feat: initial commit

vendor/github.com/charmbracelet/x/ansi/LICENSE

@@ -0,0 +1,21 @@
+MIT License
+
+Copyright (c) 2023 Charmbracelet, Inc.
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.

vendor/github.com/charmbracelet/x/ansi/ansi.go

@@ -0,0 +1,11 @@
+package ansi
+
+import "io"
+
+// Execute is a function that "execute" the given escape sequence by writing it
+// to the provided output writter.
+//
+// This is a syntactic sugar over [io.WriteString].
+func Execute(w io.Writer, s string) (int, error) {
+	return io.WriteString(w, s) //nolint:wrapcheck
+}

vendor/github.com/charmbracelet/x/ansi/ascii.go

@@ -0,0 +1,8 @@
+package ansi
+
+const (
+	// SP is the space character (Char: \x20).
+	SP = 0x20
+	// DEL is the delete character (Caret: ^?, Char: \x7f).
+	DEL = 0x7F
+)

vendor/github.com/charmbracelet/x/ansi/background.go

@@ -0,0 +1,178 @@
+package ansi
+
+import (
+	"fmt"
+	"image/color"
+
+	"github.com/lucasb-eyer/go-colorful"
+)
+
+// HexColor is a [color.Color] that can be formatted as a hex string.
+type HexColor string
+
+// RGBA returns the RGBA values of the color.
+func (h HexColor) RGBA() (r, g, b, a uint32) {
+	hex := h.color()
+	if hex == nil {
+		return 0, 0, 0, 0
+	}
+	return hex.RGBA()
+}
+
+// Hex returns the hex representation of the color. If the color is invalid, it
+// returns an empty string.
+func (h HexColor) Hex() string {
+	hex := h.color()
+	if hex == nil {
+		return ""
+	}
+	return hex.Hex()
+}
+
+// String returns the color as a hex string. If the color is nil, an empty
+// string is returned.
+func (h HexColor) String() string {
+	return h.Hex()
+}
+
+// color returns the underlying color of the HexColor.
+func (h HexColor) color() *colorful.Color {
+	hex, err := colorful.Hex(string(h))
+	if err != nil {
+		return nil
+	}
+	return &hex
+}
+
+// XRGBColor is a [color.Color] that can be formatted as an XParseColor
+// rgb: string.
+//
+// See: https://linux.die.net/man/3/xparsecolor
+type XRGBColor struct {
+	color.Color
+}
+
+// RGBA returns the RGBA values of the color.
+func (x XRGBColor) RGBA() (r, g, b, a uint32) {
+	if x.Color == nil {
+		return 0, 0, 0, 0
+	}
+	return x.Color.RGBA()
+}
+
+// String returns the color as an XParseColor rgb: string. If the color is nil,
+// an empty string is returned.
+func (x XRGBColor) String() string {
+	if x.Color == nil {
+		return ""
+	}
+	r, g, b, _ := x.Color.RGBA()
+	// Get the lower 8 bits
+	return fmt.Sprintf("rgb:%04x/%04x/%04x", r, g, b)
+}
+
+// XRGBAColor is a [color.Color] that can be formatted as an XParseColor
+// rgba: string.
+//
+// See: https://linux.die.net/man/3/xparsecolor
+type XRGBAColor struct {
+	color.Color
+}
+
+// RGBA returns the RGBA values of the color.
+func (x XRGBAColor) RGBA() (r, g, b, a uint32) {
+	if x.Color == nil {
+		return 0, 0, 0, 0
+	}
+	return x.Color.RGBA()
+}
+
+// String returns the color as an XParseColor rgba: string. If the color is nil,
+// an empty string is returned.
+func (x XRGBAColor) String() string {
+	if x.Color == nil {
+		return ""
+	}
+	r, g, b, a := x.RGBA()
+	// Get the lower 8 bits
+	return fmt.Sprintf("rgba:%04x/%04x/%04x/%04x", r, g, b, a)
+}
+
+// SetForegroundColor returns a sequence that sets the default terminal
+// foreground color.
+//
+//	OSC 10 ; color ST
+//	OSC 10 ; color BEL
+//
+// Where color is the encoded color number. Most terminals support hex,
+// XParseColor rgb: and rgba: strings. You could use [HexColor], [XRGBColor],
+// or [XRGBAColor] to format the color.
+//
+// See: https://invisible-island.net/xterm/ctlseqs/ctlseqs.html#h3-Operating-System-Commands
+func SetForegroundColor(s string) string {
+	return "\x1b]10;" + s + "\x07"
+}
+
+// RequestForegroundColor is a sequence that requests the current default
+// terminal foreground color.
+//
+// See: https://invisible-island.net/xterm/ctlseqs/ctlseqs.html#h3-Operating-System-Commands
+const RequestForegroundColor = "\x1b]10;?\x07"
+
+// ResetForegroundColor is a sequence that resets the default terminal
+// foreground color.
+//
+// See: https://invisible-island.net/xterm/ctlseqs/ctlseqs.html#h3-Operating-System-Commands
+const ResetForegroundColor = "\x1b]110\x07"
+
+// SetBackgroundColor returns a sequence that sets the default terminal
+// background color.
+//
+//	OSC 11 ; color ST
+//	OSC 11 ; color BEL
+//
+// Where color is the encoded color number. Most terminals support hex,
+// XParseColor rgb: and rgba: strings. You could use [HexColor], [XRGBColor],
+// or [XRGBAColor] to format the color.
+//
+// See: https://invisible-island.net/xterm/ctlseqs/ctlseqs.html#h3-Operating-System-Commands
+func SetBackgroundColor(s string) string {
+	return "\x1b]11;" + s + "\x07"
+}
+
+// RequestBackgroundColor is a sequence that requests the current default
+// terminal background color.
+//
+// See: https://invisible-island.net/xterm/ctlseqs/ctlseqs.html#h3-Operating-System-Commands
+const RequestBackgroundColor = "\x1b]11;?\x07"
+
+// ResetBackgroundColor is a sequence that resets the default terminal
+// background color.
+//
+// See: https://invisible-island.net/xterm/ctlseqs/ctlseqs.html#h3-Operating-System-Commands
+const ResetBackgroundColor = "\x1b]111\x07"
+
+// SetCursorColor returns a sequence that sets the terminal cursor color.
+//
+//	OSC 12 ; color ST
+//	OSC 12 ; color BEL
+//
+// Where color is the encoded color number. Most terminals support hex,
+// XParseColor rgb: and rgba: strings. You could use [HexColor], [XRGBColor],
+// or [XRGBAColor] to format the color.
+//
+// See: https://invisible-island.net/xterm/ctlseqs/ctlseqs.html#h3-Operating-System-Commands
+func SetCursorColor(s string) string {
+	return "\x1b]12;" + s + "\x07"
+}
+
+// RequestCursorColor is a sequence that requests the current terminal cursor
+// color.
+//
+// See: https://invisible-island.net/xterm/ctlseqs/ctlseqs.html#h3-Operating-System-Commands
+const RequestCursorColor = "\x1b]12;?\x07"
+
+// ResetCursorColor is a sequence that resets the terminal cursor color.
+//
+// See: https://invisible-island.net/xterm/ctlseqs/ctlseqs.html#h3-Operating-System-Commands
+const ResetCursorColor = "\x1b]112\x07"

vendor/github.com/charmbracelet/x/ansi/c0.go

@@ -0,0 +1,79 @@
+package ansi
+
+// C0 control characters.
+//
+// These range from (0x00-0x1F) as defined in ISO 646 (ASCII).
+// See: https://en.wikipedia.org/wiki/C0_and_C1_control_codes
+const (
+	// NUL is the null character (Caret: ^@, Char: \0).
+	NUL = 0x00
+	// SOH is the start of heading character (Caret: ^A).
+	SOH = 0x01
+	// STX is the start of text character (Caret: ^B).
+	STX = 0x02
+	// ETX is the end of text character (Caret: ^C).
+	ETX = 0x03
+	// EOT is the end of transmission character (Caret: ^D).
+	EOT = 0x04
+	// ENQ is the enquiry character (Caret: ^E).
+	ENQ = 0x05
+	// ACK is the acknowledge character (Caret: ^F).
+	ACK = 0x06
+	// BEL is the bell character (Caret: ^G, Char: \a).
+	BEL = 0x07
+	// BS is the backspace character (Caret: ^H, Char: \b).
+	BS = 0x08
+	// HT is the horizontal tab character (Caret: ^I, Char: \t).
+	HT = 0x09
+	// LF is the line feed character (Caret: ^J, Char: \n).
+	LF = 0x0A
+	// VT is the vertical tab character (Caret: ^K, Char: \v).
+	VT = 0x0B
+	// FF is the form feed character (Caret: ^L, Char: \f).
+	FF = 0x0C
+	// CR is the carriage return character (Caret: ^M, Char: \r).
+	CR = 0x0D
+	// SO is the shift out character (Caret: ^N).
+	SO = 0x0E
+	// SI is the shift in character (Caret: ^O).
+	SI = 0x0F
+	// DLE is the data link escape character (Caret: ^P).
+	DLE = 0x10
+	// DC1 is the device control 1 character (Caret: ^Q).
+	DC1 = 0x11
+	// DC2 is the device control 2 character (Caret: ^R).
+	DC2 = 0x12
+	// DC3 is the device control 3 character (Caret: ^S).
+	DC3 = 0x13
+	// DC4 is the device control 4 character (Caret: ^T).
+	DC4 = 0x14
+	// NAK is the negative acknowledge character (Caret: ^U).
+	NAK = 0x15
+	// SYN is the synchronous idle character (Caret: ^V).
+	SYN = 0x16
+	// ETB is the end of transmission block character (Caret: ^W).
+	ETB = 0x17
+	// CAN is the cancel character (Caret: ^X).
+	CAN = 0x18
+	// EM is the end of medium character (Caret: ^Y).
+	EM = 0x19
+	// SUB is the substitute character (Caret: ^Z).
+	SUB = 0x1A
+	// ESC is the escape character (Caret: ^[, Char: \e).
+	ESC = 0x1B
+	// FS is the file separator character (Caret: ^\).
+	FS = 0x1C
+	// GS is the group separator character (Caret: ^]).
+	GS = 0x1D
+	// RS is the record separator character (Caret: ^^).
+	RS = 0x1E
+	// US is the unit separator character (Caret: ^_).
+	US = 0x1F
+
+	// LS0 is the locking shift 0 character.
+	// This is an alias for [SI].
+	LS0 = SI
+	// LS1 is the locking shift 1 character.
+	// This is an alias for [SO].
+	LS1 = SO
+)

vendor/github.com/charmbracelet/x/ansi/c1.go

@@ -0,0 +1,72 @@
+package ansi
+
+// C1 control characters.
+//
+// These range from (0x80-0x9F) as defined in ISO 6429 (ECMA-48).
+// See: https://en.wikipedia.org/wiki/C0_and_C1_control_codes
+const (
+	// PAD is the padding character.
+	PAD = 0x80
+	// HOP is the high octet preset character.
+	HOP = 0x81
+	// BPH is the break permitted here character.
+	BPH = 0x82
+	// NBH is the no break here character.
+	NBH = 0x83
+	// IND is the index character.
+	IND = 0x84
+	// NEL is the next line character.
+	NEL = 0x85
+	// SSA is the start of selected area character.
+	SSA = 0x86
+	// ESA is the end of selected area character.
+	ESA = 0x87
+	// HTS is the horizontal tab set character.
+	HTS = 0x88
+	// HTJ is the horizontal tab with justification character.
+	HTJ = 0x89
+	// VTS is the vertical tab set character.
+	VTS = 0x8A
+	// PLD is the partial line forward character.
+	PLD = 0x8B
+	// PLU is the partial line backward character.
+	PLU = 0x8C
+	// RI is the reverse index character.
+	RI = 0x8D
+	// SS2 is the single shift 2 character.
+	SS2 = 0x8E
+	// SS3 is the single shift 3 character.
+	SS3 = 0x8F
+	// DCS is the device control string character.
+	DCS = 0x90
+	// PU1 is the private use 1 character.
+	PU1 = 0x91
+	// PU2 is the private use 2 character.
+	PU2 = 0x92
+	// STS is the set transmit state character.
+	STS = 0x93
+	// CCH is the cancel character.
+	CCH = 0x94
+	// MW is the message waiting character.
+	MW = 0x95
+	// SPA is the start of guarded area character.
+	SPA = 0x96
+	// EPA is the end of guarded area character.
+	EPA = 0x97
+	// SOS is the start of string character.
+	SOS = 0x98
+	// SGCI is the single graphic character introducer character.
+	SGCI = 0x99
+	// SCI is the single character introducer character.
+	SCI = 0x9A
+	// CSI is the control sequence introducer character.
+	CSI = 0x9B
+	// ST is the string terminator character.
+	ST = 0x9C
+	// OSC is the operating system command character.
+	OSC = 0x9D
+	// PM is the privacy message character.
+	PM = 0x9E
+	// APC is the application program command character.
+	APC = 0x9F
+)

vendor/github.com/charmbracelet/x/ansi/charset.go

@@ -0,0 +1,55 @@
+package ansi
+
+// SelectCharacterSet sets the G-set character designator to the specified
+// character set.
+//
+//	ESC Ps Pd
+//
+// Where Ps is the G-set character designator, and Pd is the identifier.
+// For 94-character sets, the designator can be one of:
+//   - ( G0
+//   - ) G1
+//   - * G2
+//   - + G3
+//
+// For 96-character sets, the designator can be one of:
+//   - - G1
+//   - . G2
+//   - / G3
+//
+// Some common 94-character sets are:
+//   - 0 DEC Special Drawing Set
+//   - A United Kingdom (UK)
+//   - B United States (USASCII)
+//
+// Examples:
+//
+//	ESC ( B  Select character set G0 = United States (USASCII)
+//	ESC ( 0  Select character set G0 = Special Character and Line Drawing Set
+//	ESC ) 0  Select character set G1 = Special Character and Line Drawing Set
+//	ESC * A  Select character set G2 = United Kingdom (UK)
+//
+// See: https://vt100.net/docs/vt510-rm/SCS.html
+func SelectCharacterSet(gset byte, charset byte) string {
+	return "\x1b" + string(gset) + string(charset)
+}
+
+// SCS is an alias for SelectCharacterSet.
+func SCS(gset byte, charset byte) string {
+	return SelectCharacterSet(gset, charset)
+}
+
+// LS1R (Locking Shift 1 Right) shifts G1 into GR character set.
+const LS1R = "\x1b~"
+
+// LS2 (Locking Shift 2) shifts G2 into GL character set.
+const LS2 = "\x1bn"
+
+// LS2R (Locking Shift 2 Right) shifts G2 into GR character set.
+const LS2R = "\x1b}"
+
+// LS3 (Locking Shift 3) shifts G3 into GL character set.
+const LS3 = "\x1bo"
+
+// LS3R (Locking Shift 3 Right) shifts G3 into GR character set.
+const LS3R = "\x1b|"

vendor/github.com/charmbracelet/x/ansi/clipboard.go

@@ -0,0 +1,75 @@
+package ansi
+
+import "encoding/base64"
+
+// Clipboard names.
+const (
+	SystemClipboard  = 'c'
+	PrimaryClipboard = 'p'
+)
+
+// SetClipboard returns a sequence for manipulating the clipboard.
+//
+//	OSC 52 ; Pc ; Pd ST
+//	OSC 52 ; Pc ; Pd BEL
+//
+// Where Pc is the clipboard name and Pd is the base64 encoded data.
+// Empty data or invalid base64 data will reset the clipboard.
+//
+// See: https://invisible-island.net/xterm/ctlseqs/ctlseqs.html#h3-Operating-System-Commands
+func SetClipboard(c byte, d string) string {
+	if d != "" {
+		d = base64.StdEncoding.EncodeToString([]byte(d))
+	}
+	return "\x1b]52;" + string(c) + ";" + d + "\x07"
+}
+
+// SetSystemClipboard returns a sequence for setting the system clipboard.
+//
+// This is equivalent to SetClipboard(SystemClipboard, d).
+func SetSystemClipboard(d string) string {
+	return SetClipboard(SystemClipboard, d)
+}
+
+// SetPrimaryClipboard returns a sequence for setting the primary clipboard.
+//
+// This is equivalent to SetClipboard(PrimaryClipboard, d).
+func SetPrimaryClipboard(d string) string {
+	return SetClipboard(PrimaryClipboard, d)
+}
+
+// ResetClipboard returns a sequence for resetting the clipboard.
+//
+// This is equivalent to SetClipboard(c, "").
+//
+// See: https://invisible-island.net/xterm/ctlseqs/ctlseqs.html#h3-Operating-System-Commands
+func ResetClipboard(c byte) string {
+	return SetClipboard(c, "")
+}
+
+// ResetSystemClipboard is a sequence for resetting the system clipboard.
+//
+// This is equivalent to ResetClipboard(SystemClipboard).
+const ResetSystemClipboard = "\x1b]52;c;\x07"
+
+// ResetPrimaryClipboard is a sequence for resetting the primary clipboard.
+//
+// This is equivalent to ResetClipboard(PrimaryClipboard).
+const ResetPrimaryClipboard = "\x1b]52;p;\x07"
+
+// RequestClipboard returns a sequence for requesting the clipboard.
+//
+// See: https://invisible-island.net/xterm/ctlseqs/ctlseqs.html#h3-Operating-System-Commands
+func RequestClipboard(c byte) string {
+	return "\x1b]52;" + string(c) + ";?\x07"
+}
+
+// RequestSystemClipboard is a sequence for requesting the system clipboard.
+//
+// This is equivalent to RequestClipboard(SystemClipboard).
+const RequestSystemClipboard = "\x1b]52;c;?\x07"
+
+// RequestPrimaryClipboard is a sequence for requesting the primary clipboard.
+//
+// This is equivalent to RequestClipboard(PrimaryClipboard).
+const RequestPrimaryClipboard = "\x1b]52;p;?\x07"

vendor/github.com/charmbracelet/x/ansi/color.go

@@ -0,0 +1,784 @@
+package ansi
+
+import (
+	"image/color"
+
+	"github.com/lucasb-eyer/go-colorful"
+)
+
+// Color is a color that can be used in a terminal. ANSI (including
+// ANSI256) and 24-bit "true colors" fall under this category.
+type Color interface {
+	color.Color
+}
+
+// BasicColor is an ANSI 3-bit or 4-bit color with a value from 0 to 15.
+type BasicColor uint8
+
+var _ Color = BasicColor(0)
+
+const (
+	// Black is the ANSI black color.
+	Black BasicColor = iota
+
+	// Red is the ANSI red color.
+	Red
+
+	// Green is the ANSI green color.
+	Green
+
+	// Yellow is the ANSI yellow color.
+	Yellow
+
+	// Blue is the ANSI blue color.
+	Blue
+
+	// Magenta is the ANSI magenta color.
+	Magenta
+
+	// Cyan is the ANSI cyan color.
+	Cyan
+
+	// White is the ANSI white color.
+	White
+
+	// BrightBlack is the ANSI bright black color.
+	BrightBlack
+
+	// BrightRed is the ANSI bright red color.
+	BrightRed
+
+	// BrightGreen is the ANSI bright green color.
+	BrightGreen
+
+	// BrightYellow is the ANSI bright yellow color.
+	BrightYellow
+
+	// BrightBlue is the ANSI bright blue color.
+	BrightBlue
+
+	// BrightMagenta is the ANSI bright magenta color.
+	BrightMagenta
+
+	// BrightCyan is the ANSI bright cyan color.
+	BrightCyan
+
+	// BrightWhite is the ANSI bright white color.
+	BrightWhite
+)
+
+// RGBA returns the red, green, blue and alpha components of the color. It
+// satisfies the color.Color interface.
+func (c BasicColor) RGBA() (uint32, uint32, uint32, uint32) {
+	ansi := uint32(c)
+	if ansi > 15 {
+		return 0, 0, 0, 0xffff
+	}
+
+	return ansiToRGB(byte(ansi)).RGBA()
+}
+
+// IndexedColor is an ANSI 256 (8-bit) color with a value from 0 to 255.
+type IndexedColor uint8
+
+var _ Color = IndexedColor(0)
+
+// RGBA returns the red, green, blue and alpha components of the color. It
+// satisfies the color.Color interface.
+func (c IndexedColor) RGBA() (uint32, uint32, uint32, uint32) {
+	return ansiToRGB(byte(c)).RGBA()
+}
+
+// ExtendedColor is an ANSI 256 (8-bit) color with a value from 0 to 255.
+//
+// Deprecated: use [IndexedColor] instead.
+type ExtendedColor = IndexedColor
+
+// TrueColor is a 24-bit color that can be used in the terminal.
+// This can be used to represent RGB colors.
+//
+// For example, the color red can be represented as:
+//
+//	TrueColor(0xff0000)
+//
+// Deprecated: use [RGBColor] instead.
+type TrueColor uint32
+
+var _ Color = TrueColor(0)
+
+// RGBA returns the red, green, blue and alpha components of the color. It
+// satisfies the color.Color interface.
+func (c TrueColor) RGBA() (uint32, uint32, uint32, uint32) {
+	r, g, b := hexToRGB(uint32(c))
+	return toRGBA(r, g, b)
+}
+
+// RGBColor is a 24-bit color that can be used in the terminal.
+// This can be used to represent RGB colors.
+type RGBColor struct {
+	R uint8
+	G uint8
+	B uint8
+}
+
+// RGBA returns the red, green, blue and alpha components of the color. It
+// satisfies the color.Color interface.
+func (c RGBColor) RGBA() (uint32, uint32, uint32, uint32) {
+	return toRGBA(uint32(c.R), uint32(c.G), uint32(c.B))
+}
+
+// ansiToRGB converts an ANSI color to a 24-bit RGB color.
+//
+//	r, g, b := ansiToRGB(57)
+func ansiToRGB(ansi byte) color.Color {
+	return ansiHex[ansi]
+}
+
+// hexToRGB converts a number in hexadecimal format to red, green, and blue
+// values.
+//
+//	r, g, b := hexToRGB(0x0000FF)
+func hexToRGB(hex uint32) (uint32, uint32, uint32) {
+	return hex >> 16 & 0xff, hex >> 8 & 0xff, hex & 0xff
+}
+
+// toRGBA converts an RGB 8-bit color values to 32-bit color values suitable
+// for color.Color.
+//
+// color.Color requires 16-bit color values, so we duplicate the 8-bit values
+// to fill the 16-bit values.
+//
+// This always returns 0xffff (opaque) for the alpha channel.
+func toRGBA(r, g, b uint32) (uint32, uint32, uint32, uint32) {
+	r |= r << 8
+	g |= g << 8
+	b |= b << 8
+	return r, g, b, 0xffff
+}
+
+//nolint:unused
+func distSq(r1, g1, b1, r2, g2, b2 int) int {
+	return ((r1-r2)*(r1-r2) + (g1-g2)*(g1-g2) + (b1-b2)*(b1-b2))
+}
+
+func to6Cube[T int | float64](v T) int {
+	if v < 48 {
+		return 0
+	}
+	if v < 115 {
+		return 1
+	}
+	return int((v - 35) / 40)
+}
+
+// Convert256 converts a [color.Color], usually a 24-bit color, to xterm(1) 256
+// color palette.
+//
+// xterm provides a 6x6x6 color cube (16 - 231) and 24 greys (232 - 255). We
+// map our RGB color to the closest in the cube, also work out the closest
+// grey, and use the nearest of the two based on the lightness of the color.
+//
+// Note that the xterm has much lower resolution for darker colors (they are
+// not evenly spread out), so our 6 levels are not evenly spread: 0x0, 0x5f
+// (95), 0x87 (135), 0xaf (175), 0xd7 (215) and 0xff (255). Greys are more
+// evenly spread (8, 18, 28 ... 238).
+func Convert256(c color.Color) IndexedColor {
+	// If the color is already an IndexedColor, return it.
+	if i, ok := c.(IndexedColor); ok {
+		return i
+	}
+
+	// Note: this is mostly ported from tmux/colour.c.
+	col, ok := colorful.MakeColor(c)
+	if !ok {
+		return IndexedColor(0)
+	}
+
+	r := col.R * 255
+	g := col.G * 255
+	b := col.B * 255
+
+	q2c := [6]int{0x00, 0x5f, 0x87, 0xaf, 0xd7, 0xff}
+
+	// Map RGB to 6x6x6 cube.
+	qr := to6Cube(r)
+	cr := q2c[qr]
+	qg := to6Cube(g)
+	cg := q2c[qg]
+	qb := to6Cube(b)
+	cb := q2c[qb]
+
+	// If we have hit the color exactly, return early.
+	ci := (36 * qr) + (6 * qg) + qb
+	if cr == int(r) && cg == int(g) && cb == int(b) {
+		return IndexedColor(16 + ci) //nolint:gosec
+	}
+
+	// Work out the closest grey (average of RGB).
+	greyAvg := int(r+g+b) / 3
+	var greyIdx int
+	if greyAvg > 238 {
+		greyIdx = 23
+	} else {
+		greyIdx = (greyAvg - 3) / 10
+	}
+	grey := 8 + (10 * greyIdx)
+
+	// Return the one which is nearer to the original input rgb value
+	// XXX: This is where it differs from tmux's implementation, we prefer the
+	// closer color to the original in terms of light distances rather than the
+	// cube distance.
+	c2 := colorful.Color{R: float64(cr) / 255.0, G: float64(cg) / 255.0, B: float64(cb) / 255.0}
+	g2 := colorful.Color{R: float64(grey) / 255.0, G: float64(grey) / 255.0, B: float64(grey) / 255.0}
+	colorDist := col.DistanceHSLuv(c2)
+	grayDist := col.DistanceHSLuv(g2)
+
+	if colorDist <= grayDist {
+		return IndexedColor(16 + ci) //nolint:gosec
+	}
+	return IndexedColor(232 + greyIdx) //nolint:gosec
+
+	// // Is grey or 6x6x6 color closest?
+	// d := distSq(cr, cg, cb, int(r), int(g), int(b))
+	// if distSq(grey, grey, grey, int(r), int(g), int(b)) < d {
+	// 	return IndexedColor(232 + greyIdx) //nolint:gosec
+	// }
+	// return IndexedColor(16 + ci) //nolint:gosec
+}
+
+// Convert16 converts a [color.Color] to a 16-color ANSI color. It will first
+// try to find a match in the 256 xterm(1) color palette, and then map that to
+// the 16-color ANSI palette.
+func Convert16(c color.Color) BasicColor {
+	switch c := c.(type) {
+	case BasicColor:
+		// If the color is already a BasicColor, return it.
+		return c
+	case IndexedColor:
+		// If the color is already an IndexedColor, return the corresponding
+		// BasicColor.
+		return ansi256To16[c]
+	default:
+		c256 := Convert256(c)
+		return ansi256To16[c256]
+	}
+}
+
+// RGB values of ANSI colors (0-255).
+var ansiHex = [...]color.RGBA{
+	0:   {R: 0x00, G: 0x00, B: 0x00, A: 0xff}, //   "#000000"
+	1:   {R: 0x80, G: 0x00, B: 0x00, A: 0xff}, //   "#800000"
+	2:   {R: 0x00, G: 0x80, B: 0x00, A: 0xff}, //   "#008000"
+	3:   {R: 0x80, G: 0x80, B: 0x00, A: 0xff}, //   "#808000"
+	4:   {R: 0x00, G: 0x00, B: 0x80, A: 0xff}, //   "#000080"
+	5:   {R: 0x80, G: 0x00, B: 0x80, A: 0xff}, //   "#800080"
+	6:   {R: 0x00, G: 0x80, B: 0x80, A: 0xff}, //   "#008080"
+	7:   {R: 0xc0, G: 0xc0, B: 0xc0, A: 0xff}, //   "#c0c0c0"
+	8:   {R: 0x80, G: 0x80, B: 0x80, A: 0xff}, //   "#808080"
+	9:   {R: 0xff, G: 0x00, B: 0x00, A: 0xff}, //   "#ff0000"
+	10:  {R: 0x00, G: 0xff, B: 0x00, A: 0xff}, //  "#00ff00"
+	11:  {R: 0xff, G: 0xff, B: 0x00, A: 0xff}, //  "#ffff00"
+	12:  {R: 0x00, G: 0x00, B: 0xff, A: 0xff}, //  "#0000ff"
+	13:  {R: 0xff, G: 0x00, B: 0xff, A: 0xff}, //  "#ff00ff"
+	14:  {R: 0x00, G: 0xff, B: 0xff, A: 0xff}, //  "#00ffff"
+	15:  {R: 0xff, G: 0xff, B: 0xff, A: 0xff}, //  "#ffffff"
+	16:  {R: 0x00, G: 0x00, B: 0x00, A: 0xff}, //  "#000000"
+	17:  {R: 0x00, G: 0x00, B: 0x5f, A: 0xff}, //  "#00005f"
+	18:  {R: 0x00, G: 0x00, B: 0x87, A: 0xff}, //  "#000087"
+	19:  {R: 0x00, G: 0x00, B: 0xaf, A: 0xff}, //  "#0000af"
+	20:  {R: 0x00, G: 0x00, B: 0xd7, A: 0xff}, //  "#0000d7"
+	21:  {R: 0x00, G: 0x00, B: 0xff, A: 0xff}, //  "#0000ff"
+	22:  {R: 0x00, G: 0x5f, B: 0x00, A: 0xff}, //  "#005f00"
+	23:  {R: 0x00, G: 0x5f, B: 0x5f, A: 0xff}, //  "#005f5f"
+	24:  {R: 0x00, G: 0x5f, B: 0x87, A: 0xff}, //  "#005f87"
+	25:  {R: 0x00, G: 0x5f, B: 0xaf, A: 0xff}, //  "#005faf"
+	26:  {R: 0x00, G: 0x5f, B: 0xd7, A: 0xff}, //  "#005fd7"
+	27:  {R: 0x00, G: 0x5f, B: 0xff, A: 0xff}, //  "#005fff"
+	28:  {R: 0x00, G: 0x87, B: 0x00, A: 0xff}, //  "#008700"
+	29:  {R: 0x00, G: 0x87, B: 0x5f, A: 0xff}, //  "#00875f"
+	30:  {R: 0x00, G: 0x87, B: 0x87, A: 0xff}, //  "#008787"
+	31:  {R: 0x00, G: 0x87, B: 0xaf, A: 0xff}, //  "#0087af"
+	32:  {R: 0x00, G: 0x87, B: 0xd7, A: 0xff}, //  "#0087d7"
+	33:  {R: 0x00, G: 0x87, B: 0xff, A: 0xff}, //  "#0087ff"
+	34:  {R: 0x00, G: 0xaf, B: 0x00, A: 0xff}, //  "#00af00"
+	35:  {R: 0x00, G: 0xaf, B: 0x5f, A: 0xff}, //  "#00af5f"
+	36:  {R: 0x00, G: 0xaf, B: 0x87, A: 0xff}, //  "#00af87"
+	37:  {R: 0x00, G: 0xaf, B: 0xaf, A: 0xff}, //  "#00afaf"
+	38:  {R: 0x00, G: 0xaf, B: 0xd7, A: 0xff}, //  "#00afd7"
+	39:  {R: 0x00, G: 0xaf, B: 0xff, A: 0xff}, //  "#00afff"
+	40:  {R: 0x00, G: 0xd7, B: 0x00, A: 0xff}, //  "#00d700"
+	41:  {R: 0x00, G: 0xd7, B: 0x5f, A: 0xff}, //  "#00d75f"
+	42:  {R: 0x00, G: 0xd7, B: 0x87, A: 0xff}, //  "#00d787"
+	43:  {R: 0x00, G: 0xd7, B: 0xaf, A: 0xff}, //  "#00d7af"
+	44:  {R: 0x00, G: 0xd7, B: 0xd7, A: 0xff}, //  "#00d7d7"
+	45:  {R: 0x00, G: 0xd7, B: 0xff, A: 0xff}, //  "#00d7ff"
+	46:  {R: 0x00, G: 0xff, B: 0x00, A: 0xff}, //  "#00ff00"
+	47:  {R: 0x00, G: 0xff, B: 0x5f, A: 0xff}, //  "#00ff5f"
+	48:  {R: 0x00, G: 0xff, B: 0x87, A: 0xff}, //  "#00ff87"
+	49:  {R: 0x00, G: 0xff, B: 0xaf, A: 0xff}, //  "#00ffaf"
+	50:  {R: 0x00, G: 0xff, B: 0xd7, A: 0xff}, //  "#00ffd7"
+	51:  {R: 0x00, G: 0xff, B: 0xff, A: 0xff}, //  "#00ffff"
+	52:  {R: 0x5f, G: 0x00, B: 0x00, A: 0xff}, //  "#5f0000"
+	53:  {R: 0x5f, G: 0x00, B: 0x5f, A: 0xff}, //  "#5f005f"
+	54:  {R: 0x5f, G: 0x00, B: 0x87, A: 0xff}, //  "#5f0087"
+	55:  {R: 0x5f, G: 0x00, B: 0xaf, A: 0xff}, //  "#5f00af"
+	56:  {R: 0x5f, G: 0x00, B: 0xd7, A: 0xff}, //  "#5f00d7"
+	57:  {R: 0x5f, G: 0x00, B: 0xff, A: 0xff}, //  "#5f00ff"
+	58:  {R: 0x5f, G: 0x5f, B: 0x00, A: 0xff}, //  "#5f5f00"
+	59:  {R: 0x5f, G: 0x5f, B: 0x5f, A: 0xff}, //  "#5f5f5f"
+	60:  {R: 0x5f, G: 0x5f, B: 0x87, A: 0xff}, //  "#5f5f87"
+	61:  {R: 0x5f, G: 0x5f, B: 0xaf, A: 0xff}, //  "#5f5faf"
+	62:  {R: 0x5f, G: 0x5f, B: 0xd7, A: 0xff}, //  "#5f5fd7"
+	63:  {R: 0x5f, G: 0x5f, B: 0xff, A: 0xff}, //  "#5f5fff"
+	64:  {R: 0x5f, G: 0x87, B: 0x00, A: 0xff}, //  "#5f8700"
+	65:  {R: 0x5f, G: 0x87, B: 0x5f, A: 0xff}, //  "#5f875f"
+	66:  {R: 0x5f, G: 0x87, B: 0x87, A: 0xff}, //  "#5f8787"
+	67:  {R: 0x5f, G: 0x87, B: 0xaf, A: 0xff}, //  "#5f87af"
+	68:  {R: 0x5f, G: 0x87, B: 0xd7, A: 0xff}, //  "#5f87d7"
+	69:  {R: 0x5f, G: 0x87, B: 0xff, A: 0xff}, //  "#5f87ff"
+	70:  {R: 0x5f, G: 0xaf, B: 0x00, A: 0xff}, //  "#5faf00"
+	71:  {R: 0x5f, G: 0xaf, B: 0x5f, A: 0xff}, //  "#5faf5f"
+	72:  {R: 0x5f, G: 0xaf, B: 0x87, A: 0xff}, //  "#5faf87"
+	73:  {R: 0x5f, G: 0xaf, B: 0xaf, A: 0xff}, //  "#5fafaf"
+	74:  {R: 0x5f, G: 0xaf, B: 0xd7, A: 0xff}, //  "#5fafd7"
+	75:  {R: 0x5f, G: 0xaf, B: 0xff, A: 0xff}, //  "#5fafff"
+	76:  {R: 0x5f, G: 0xd7, B: 0x00, A: 0xff}, //  "#5fd700"
+	77:  {R: 0x5f, G: 0xd7, B: 0x5f, A: 0xff}, //  "#5fd75f"
+	78:  {R: 0x5f, G: 0xd7, B: 0x87, A: 0xff}, //  "#5fd787"
+	79:  {R: 0x5f, G: 0xd7, B: 0xaf, A: 0xff}, //  "#5fd7af"
+	80:  {R: 0x5f, G: 0xd7, B: 0xd7, A: 0xff}, //  "#5fd7d7"
+	81:  {R: 0x5f, G: 0xd7, B: 0xff, A: 0xff}, //  "#5fd7ff"
+	82:  {R: 0x5f, G: 0xff, B: 0x00, A: 0xff}, //  "#5fff00"
+	83:  {R: 0x5f, G: 0xff, B: 0x5f, A: 0xff}, //  "#5fff5f"
+	84:  {R: 0x5f, G: 0xff, B: 0x87, A: 0xff}, //  "#5fff87"
+	85:  {R: 0x5f, G: 0xff, B: 0xaf, A: 0xff}, //  "#5fffaf"
+	86:  {R: 0x5f, G: 0xff, B: 0xd7, A: 0xff}, //  "#5fffd7"
+	87:  {R: 0x5f, G: 0xff, B: 0xff, A: 0xff}, //  "#5fffff"
+	88:  {R: 0x87, G: 0x00, B: 0x00, A: 0xff}, //  "#870000"
+	89:  {R: 0x87, G: 0x00, B: 0x5f, A: 0xff}, //  "#87005f"
+	90:  {R: 0x87, G: 0x00, B: 0x87, A: 0xff}, //  "#870087"
+	91:  {R: 0x87, G: 0x00, B: 0xaf, A: 0xff}, //  "#8700af"
+	92:  {R: 0x87, G: 0x00, B: 0xd7, A: 0xff}, //  "#8700d7"
+	93:  {R: 0x87, G: 0x00, B: 0xff, A: 0xff}, //  "#8700ff"
+	94:  {R: 0x87, G: 0x5f, B: 0x00, A: 0xff}, //  "#875f00"
+	95:  {R: 0x87, G: 0x5f, B: 0x5f, A: 0xff}, //  "#875f5f"
+	96:  {R: 0x87, G: 0x5f, B: 0x87, A: 0xff}, //  "#875f87"
+	97:  {R: 0x87, G: 0x5f, B: 0xaf, A: 0xff}, //  "#875faf"
+	98:  {R: 0x87, G: 0x5f, B: 0xd7, A: 0xff}, //  "#875fd7"
+	99:  {R: 0x87, G: 0x5f, B: 0xff, A: 0xff}, //  "#875fff"
+	100: {R: 0x87, G: 0x87, B: 0x00, A: 0xff}, // "#878700"
+	101: {R: 0x87, G: 0x87, B: 0x5f, A: 0xff}, // "#87875f"
+	102: {R: 0x87, G: 0x87, B: 0x87, A: 0xff}, // "#878787"
+	103: {R: 0x87, G: 0x87, B: 0xaf, A: 0xff}, // "#8787af"
+	104: {R: 0x87, G: 0x87, B: 0xd7, A: 0xff}, // "#8787d7"
+	105: {R: 0x87, G: 0x87, B: 0xff, A: 0xff}, // "#8787ff"
+	106: {R: 0x87, G: 0xaf, B: 0x00, A: 0xff}, // "#87af00"
+	107: {R: 0x87, G: 0xaf, B: 0x5f, A: 0xff}, // "#87af5f"
+	108: {R: 0x87, G: 0xaf, B: 0x87, A: 0xff}, // "#87af87"
+	109: {R: 0x87, G: 0xaf, B: 0xaf, A: 0xff}, // "#87afaf"
+	110: {R: 0x87, G: 0xaf, B: 0xd7, A: 0xff}, // "#87afd7"
+	111: {R: 0x87, G: 0xaf, B: 0xff, A: 0xff}, // "#87afff"
+	112: {R: 0x87, G: 0xd7, B: 0x00, A: 0xff}, // "#87d700"
+	113: {R: 0x87, G: 0xd7, B: 0x5f, A: 0xff}, // "#87d75f"
+	114: {R: 0x87, G: 0xd7, B: 0x87, A: 0xff}, // "#87d787"
+	115: {R: 0x87, G: 0xd7, B: 0xaf, A: 0xff}, // "#87d7af"
+	116: {R: 0x87, G: 0xd7, B: 0xd7, A: 0xff}, // "#87d7d7"
+	117: {R: 0x87, G: 0xd7, B: 0xff, A: 0xff}, // "#87d7ff"
+	118: {R: 0x87, G: 0xff, B: 0x00, A: 0xff}, // "#87ff00"
+	119: {R: 0x87, G: 0xff, B: 0x5f, A: 0xff}, // "#87ff5f"
+	120: {R: 0x87, G: 0xff, B: 0x87, A: 0xff}, // "#87ff87"
+	121: {R: 0x87, G: 0xff, B: 0xaf, A: 0xff}, // "#87ffaf"
+	122: {R: 0x87, G: 0xff, B: 0xd7, A: 0xff}, // "#87ffd7"
+	123: {R: 0x87, G: 0xff, B: 0xff, A: 0xff}, // "#87ffff"
+	124: {R: 0xaf, G: 0x00, B: 0x00, A: 0xff}, // "#af0000"
+	125: {R: 0xaf, G: 0x00, B: 0x5f, A: 0xff}, // "#af005f"
+	126: {R: 0xaf, G: 0x00, B: 0x87, A: 0xff}, // "#af0087"
+	127: {R: 0xaf, G: 0x00, B: 0xaf, A: 0xff}, // "#af00af"
+	128: {R: 0xaf, G: 0x00, B: 0xd7, A: 0xff}, // "#af00d7"
+	129: {R: 0xaf, G: 0x00, B: 0xff, A: 0xff}, // "#af00ff"
+	130: {R: 0xaf, G: 0x5f, B: 0x00, A: 0xff}, // "#af5f00"
+	131: {R: 0xaf, G: 0x5f, B: 0x5f, A: 0xff}, // "#af5f5f"
+	132: {R: 0xaf, G: 0x5f, B: 0x87, A: 0xff}, // "#af5f87"
+	133: {R: 0xaf, G: 0x5f, B: 0xaf, A: 0xff}, // "#af5faf"
+	134: {R: 0xaf, G: 0x5f, B: 0xd7, A: 0xff}, // "#af5fd7"
+	135: {R: 0xaf, G: 0x5f, B: 0xff, A: 0xff}, // "#af5fff"
+	136: {R: 0xaf, G: 0x87, B: 0x00, A: 0xff}, // "#af8700"
+	137: {R: 0xaf, G: 0x87, B: 0x5f, A: 0xff}, // "#af875f"
+	138: {R: 0xaf, G: 0x87, B: 0x87, A: 0xff}, // "#af8787"
+	139: {R: 0xaf, G: 0x87, B: 0xaf, A: 0xff}, // "#af87af"
+	140: {R: 0xaf, G: 0x87, B: 0xd7, A: 0xff}, // "#af87d7"
+	141: {R: 0xaf, G: 0x87, B: 0xff, A: 0xff}, // "#af87ff"
+	142: {R: 0xaf, G: 0xaf, B: 0x00, A: 0xff}, // "#afaf00"
+	143: {R: 0xaf, G: 0xaf, B: 0x5f, A: 0xff}, // "#afaf5f"
+	144: {R: 0xaf, G: 0xaf, B: 0x87, A: 0xff}, // "#afaf87"
+	145: {R: 0xaf, G: 0xaf, B: 0xaf, A: 0xff}, // "#afafaf"
+	146: {R: 0xaf, G: 0xaf, B: 0xd7, A: 0xff}, // "#afafd7"
+	147: {R: 0xaf, G: 0xaf, B: 0xff, A: 0xff}, // "#afafff"
+	148: {R: 0xaf, G: 0xd7, B: 0x00, A: 0xff}, // "#afd700"
+	149: {R: 0xaf, G: 0xd7, B: 0x5f, A: 0xff}, // "#afd75f"
+	150: {R: 0xaf, G: 0xd7, B: 0x87, A: 0xff}, // "#afd787"
+	151: {R: 0xaf, G: 0xd7, B: 0xaf, A: 0xff}, // "#afd7af"
+	152: {R: 0xaf, G: 0xd7, B: 0xd7, A: 0xff}, // "#afd7d7"
+	153: {R: 0xaf, G: 0xd7, B: 0xff, A: 0xff}, // "#afd7ff"
+	154: {R: 0xaf, G: 0xff, B: 0x00, A: 0xff}, // "#afff00"
+	155: {R: 0xaf, G: 0xff, B: 0x5f, A: 0xff}, // "#afff5f"
+	156: {R: 0xaf, G: 0xff, B: 0x87, A: 0xff}, // "#afff87"
+	157: {R: 0xaf, G: 0xff, B: 0xaf, A: 0xff}, // "#afffaf"
+	158: {R: 0xaf, G: 0xff, B: 0xd7, A: 0xff}, // "#afffd7"
+	159: {R: 0xaf, G: 0xff, B: 0xff, A: 0xff}, // "#afffff"
+	160: {R: 0xd7, G: 0x00, B: 0x00, A: 0xff}, // "#d70000"
+	161: {R: 0xd7, G: 0x00, B: 0x5f, A: 0xff}, // "#d7005f"
+	162: {R: 0xd7, G: 0x00, B: 0x87, A: 0xff}, // "#d70087"
+	163: {R: 0xd7, G: 0x00, B: 0xaf, A: 0xff}, // "#d700af"
+	164: {R: 0xd7, G: 0x00, B: 0xd7, A: 0xff}, // "#d700d7"
+	165: {R: 0xd7, G: 0x00, B: 0xff, A: 0xff}, // "#d700ff"
+	166: {R: 0xd7, G: 0x5f, B: 0x00, A: 0xff}, // "#d75f00"
+	167: {R: 0xd7, G: 0x5f, B: 0x5f, A: 0xff}, // "#d75f5f"
+	168: {R: 0xd7, G: 0x5f, B: 0x87, A: 0xff}, // "#d75f87"
+	169: {R: 0xd7, G: 0x5f, B: 0xaf, A: 0xff}, // "#d75faf"
+	170: {R: 0xd7, G: 0x5f, B: 0xd7, A: 0xff}, // "#d75fd7"
+	171: {R: 0xd7, G: 0x5f, B: 0xff, A: 0xff}, // "#d75fff"
+	172: {R: 0xd7, G: 0x87, B: 0x00, A: 0xff}, // "#d78700"
+	173: {R: 0xd7, G: 0x87, B: 0x5f, A: 0xff}, // "#d7875f"
+	174: {R: 0xd7, G: 0x87, B: 0x87, A: 0xff}, // "#d78787"
+	175: {R: 0xd7, G: 0x87, B: 0xaf, A: 0xff}, // "#d787af"
+	176: {R: 0xd7, G: 0x87, B: 0xd7, A: 0xff}, // "#d787d7"
+	177: {R: 0xd7, G: 0x87, B: 0xff, A: 0xff}, // "#d787ff"
+	178: {R: 0xd7, G: 0xaf, B: 0x00, A: 0xff}, // "#d7af00"
+	179: {R: 0xd7, G: 0xaf, B: 0x5f, A: 0xff}, // "#d7af5f"
+	180: {R: 0xd7, G: 0xaf, B: 0x87, A: 0xff}, // "#d7af87"
+	181: {R: 0xd7, G: 0xaf, B: 0xaf, A: 0xff}, // "#d7afaf"
+	182: {R: 0xd7, G: 0xaf, B: 0xd7, A: 0xff}, // "#d7afd7"
+	183: {R: 0xd7, G: 0xaf, B: 0xff, A: 0xff}, // "#d7afff"
+	184: {R: 0xd7, G: 0xd7, B: 0x00, A: 0xff}, // "#d7d700"
+	185: {R: 0xd7, G: 0xd7, B: 0x5f, A: 0xff}, // "#d7d75f"
+	186: {R: 0xd7, G: 0xd7, B: 0x87, A: 0xff}, // "#d7d787"
+	187: {R: 0xd7, G: 0xd7, B: 0xaf, A: 0xff}, // "#d7d7af"
+	188: {R: 0xd7, G: 0xd7, B: 0xd7, A: 0xff}, // "#d7d7d7"
+	189: {R: 0xd7, G: 0xd7, B: 0xff, A: 0xff}, // "#d7d7ff"
+	190: {R: 0xd7, G: 0xff, B: 0x00, A: 0xff}, // "#d7ff00"
+	191: {R: 0xd7, G: 0xff, B: 0x5f, A: 0xff}, // "#d7ff5f"
+	192: {R: 0xd7, G: 0xff, B: 0x87, A: 0xff}, // "#d7ff87"
+	193: {R: 0xd7, G: 0xff, B: 0xaf, A: 0xff}, // "#d7ffaf"
+	194: {R: 0xd7, G: 0xff, B: 0xd7, A: 0xff}, // "#d7ffd7"
+	195: {R: 0xd7, G: 0xff, B: 0xff, A: 0xff}, // "#d7ffff"
+	196: {R: 0xff, G: 0x00, B: 0x00, A: 0xff}, // "#ff0000"
+	197: {R: 0xff, G: 0x00, B: 0x5f, A: 0xff}, // "#ff005f"
+	198: {R: 0xff, G: 0x00, B: 0x87, A: 0xff}, // "#ff0087"
+	199: {R: 0xff, G: 0x00, B: 0xaf, A: 0xff}, // "#ff00af"
+	200: {R: 0xff, G: 0x00, B: 0xd7, A: 0xff}, // "#ff00d7"
+	201: {R: 0xff, G: 0x00, B: 0xff, A: 0xff}, // "#ff00ff"
+	202: {R: 0xff, G: 0x5f, B: 0x00, A: 0xff}, // "#ff5f00"
+	203: {R: 0xff, G: 0x5f, B: 0x5f, A: 0xff}, // "#ff5f5f"
+	204: {R: 0xff, G: 0x5f, B: 0x87, A: 0xff}, // "#ff5f87"
+	205: {R: 0xff, G: 0x5f, B: 0xaf, A: 0xff}, // "#ff5faf"
+	206: {R: 0xff, G: 0x5f, B: 0xd7, A: 0xff}, // "#ff5fd7"
+	207: {R: 0xff, G: 0x5f, B: 0xff, A: 0xff}, // "#ff5fff"
+	208: {R: 0xff, G: 0x87, B: 0x00, A: 0xff}, // "#ff8700"
+	209: {R: 0xff, G: 0x87, B: 0x5f, A: 0xff}, // "#ff875f"
+	210: {R: 0xff, G: 0x87, B: 0x87, A: 0xff}, // "#ff8787"
+	211: {R: 0xff, G: 0x87, B: 0xaf, A: 0xff}, // "#ff87af"
+	212: {R: 0xff, G: 0x87, B: 0xd7, A: 0xff}, // "#ff87d7"
+	213: {R: 0xff, G: 0x87, B: 0xff, A: 0xff}, // "#ff87ff"
+	214: {R: 0xff, G: 0xaf, B: 0x00, A: 0xff}, // "#ffaf00"
+	215: {R: 0xff, G: 0xaf, B: 0x5f, A: 0xff}, // "#ffaf5f"
+	216: {R: 0xff, G: 0xaf, B: 0x87, A: 0xff}, // "#ffaf87"
+	217: {R: 0xff, G: 0xaf, B: 0xaf, A: 0xff}, // "#ffafaf"
+	218: {R: 0xff, G: 0xaf, B: 0xd7, A: 0xff}, // "#ffafd7"
+	219: {R: 0xff, G: 0xaf, B: 0xff, A: 0xff}, // "#ffafff"
+	220: {R: 0xff, G: 0xd7, B: 0x00, A: 0xff}, // "#ffd700"
+	221: {R: 0xff, G: 0xd7, B: 0x5f, A: 0xff}, // "#ffd75f"
+	222: {R: 0xff, G: 0xd7, B: 0x87, A: 0xff}, // "#ffd787"
+	223: {R: 0xff, G: 0xd7, B: 0xaf, A: 0xff}, // "#ffd7af"
+	224: {R: 0xff, G: 0xd7, B: 0xd7, A: 0xff}, // "#ffd7d7"
+	225: {R: 0xff, G: 0xd7, B: 0xff, A: 0xff}, // "#ffd7ff"
+	226: {R: 0xff, G: 0xff, B: 0x00, A: 0xff}, // "#ffff00"
+	227: {R: 0xff, G: 0xff, B: 0x5f, A: 0xff}, // "#ffff5f"
+	228: {R: 0xff, G: 0xff, B: 0x87, A: 0xff}, // "#ffff87"
+	229: {R: 0xff, G: 0xff, B: 0xaf, A: 0xff}, // "#ffffaf"
+	230: {R: 0xff, G: 0xff, B: 0xd7, A: 0xff}, // "#ffffd7"
+	231: {R: 0xff, G: 0xff, B: 0xff, A: 0xff}, // "#ffffff"
+	232: {R: 0x08, G: 0x08, B: 0x08, A: 0xff}, // "#080808"
+	233: {R: 0x12, G: 0x12, B: 0x12, A: 0xff}, // "#121212"
+	234: {R: 0x1c, G: 0x1c, B: 0x1c, A: 0xff}, // "#1c1c1c"
+	235: {R: 0x26, G: 0x26, B: 0x26, A: 0xff}, // "#262626"
+	236: {R: 0x30, G: 0x30, B: 0x30, A: 0xff}, // "#303030"
+	237: {R: 0x3a, G: 0x3a, B: 0x3a, A: 0xff}, // "#3a3a3a"
+	238: {R: 0x44, G: 0x44, B: 0x44, A: 0xff}, // "#444444"
+	239: {R: 0x4e, G: 0x4e, B: 0x4e, A: 0xff}, // "#4e4e4e"
+	240: {R: 0x58, G: 0x58, B: 0x58, A: 0xff}, // "#585858"
+	241: {R: 0x62, G: 0x62, B: 0x62, A: 0xff}, // "#626262"
+	242: {R: 0x6c, G: 0x6c, B: 0x6c, A: 0xff}, // "#6c6c6c"
+	243: {R: 0x76, G: 0x76, B: 0x76, A: 0xff}, // "#767676"
+	244: {R: 0x80, G: 0x80, B: 0x80, A: 0xff}, // "#808080"
+	245: {R: 0x8a, G: 0x8a, B: 0x8a, A: 0xff}, // "#8a8a8a"
+	246: {R: 0x94, G: 0x94, B: 0x94, A: 0xff}, // "#949494"
+	247: {R: 0x9e, G: 0x9e, B: 0x9e, A: 0xff}, // "#9e9e9e"
+	248: {R: 0xa8, G: 0xa8, B: 0xa8, A: 0xff}, // "#a8a8a8"
+	249: {R: 0xb2, G: 0xb2, B: 0xb2, A: 0xff}, // "#b2b2b2"
+	250: {R: 0xbc, G: 0xbc, B: 0xbc, A: 0xff}, // "#bcbcbc"
+	251: {R: 0xc6, G: 0xc6, B: 0xc6, A: 0xff}, // "#c6c6c6"
+	252: {R: 0xd0, G: 0xd0, B: 0xd0, A: 0xff}, // "#d0d0d0"
+	253: {R: 0xda, G: 0xda, B: 0xda, A: 0xff}, // "#dadada"
+	254: {R: 0xe4, G: 0xe4, B: 0xe4, A: 0xff}, // "#e4e4e4"
+	255: {R: 0xee, G: 0xee, B: 0xee, A: 0xff}, // "#eeeeee"
+}
+
+var ansi256To16 = [...]BasicColor{
+	0:   0,
+	1:   1,
+	2:   2,
+	3:   3,
+	4:   4,
+	5:   5,
+	6:   6,
+	7:   7,
+	8:   8,
+	9:   9,
+	10:  10,
+	11:  11,
+	12:  12,
+	13:  13,
+	14:  14,
+	15:  15,
+	16:  0,
+	17:  4,
+	18:  4,
+	19:  4,
+	20:  12,
+	21:  12,
+	22:  2,
+	23:  6,
+	24:  4,
+	25:  4,
+	26:  12,
+	27:  12,
+	28:  2,
+	29:  2,
+	30:  6,
+	31:  4,
+	32:  12,
+	33:  12,
+	34:  2,
+	35:  2,
+	36:  2,
+	37:  6,
+	38:  12,
+	39:  12,
+	40:  10,
+	41:  10,
+	42:  10,
+	43:  10,
+	44:  14,
+	45:  12,
+	46:  10,
+	47:  10,
+	48:  10,
+	49:  10,
+	50:  10,
+	51:  14,
+	52:  1,
+	53:  5,
+	54:  4,
+	55:  4,
+	56:  12,
+	57:  12,
+	58:  3,
+	59:  8,
+	60:  4,
+	61:  4,
+	62:  12,
+	63:  12,
+	64:  2,
+	65:  2,
+	66:  6,
+	67:  4,
+	68:  12,
+	69:  12,
+	70:  2,
+	71:  2,
+	72:  2,
+	73:  6,
+	74:  12,
+	75:  12,
+	76:  10,
+	77:  10,
+	78:  10,
+	79:  10,
+	80:  14,
+	81:  12,
+	82:  10,
+	83:  10,
+	84:  10,
+	85:  10,
+	86:  10,
+	87:  14,
+	88:  1,
+	89:  1,
+	90:  5,
+	91:  4,
+	92:  12,
+	93:  12,
+	94:  1,
+	95:  1,
+	96:  5,
+	97:  4,
+	98:  12,
+	99:  12,
+	100: 3,
+	101: 3,
+	102: 8,
+	103: 4,
+	104: 12,
+	105: 12,
+	106: 2,
+	107: 2,
+	108: 2,
+	109: 6,
+	110: 12,
+	111: 12,
+	112: 10,
+	113: 10,
+	114: 10,
+	115: 10,
+	116: 14,
+	117: 12,
+	118: 10,
+	119: 10,
+	120: 10,
+	121: 10,
+	122: 10,
+	123: 14,
+	124: 1,
+	125: 1,
+	126: 1,
+	127: 5,
+	128: 12,
+	129: 12,
+	130: 1,
+	131: 1,
+	132: 1,
+	133: 5,
+	134: 12,
+	135: 12,
+	136: 1,
+	137: 1,
+	138: 1,
+	139: 5,
+	140: 12,
+	141: 12,
+	142: 3,
+	143: 3,
+	144: 3,
+	145: 7,
+	146: 12,
+	147: 12,
+	148: 10,
+	149: 10,
+	150: 10,
+	151: 10,
+	152: 14,
+	153: 12,
+	154: 10,
+	155: 10,
+	156: 10,
+	157: 10,
+	158: 10,
+	159: 14,
+	160: 9,
+	161: 9,
+	162: 9,
+	163: 9,
+	164: 13,
+	165: 12,
+	166: 9,
+	167: 9,
+	168: 9,
+	169: 9,
+	170: 13,
+	171: 12,
+	172: 9,
+	173: 9,
+	174: 9,
+	175: 9,
+	176: 13,
+	177: 12,
+	178: 9,
+	179: 9,
+	180: 9,
+	181: 9,
+	182: 13,
+	183: 12,
+	184: 11,
+	185: 11,
+	186: 11,
+	187: 11,
+	188: 7,
+	189: 12,
+	190: 10,
+	191: 10,
+	192: 10,
+	193: 10,
+	194: 10,
+	195: 14,
+	196: 9,
+	197: 9,
+	198: 9,
+	199: 9,
+	200: 9,
+	201: 13,
+	202: 9,
+	203: 9,
+	204: 9,
+	205: 9,
+	206: 9,
+	207: 13,
+	208: 9,
+	209: 9,
+	210: 9,
+	211: 9,
+	212: 9,
+	213: 13,
+	214: 9,
+	215: 9,
+	216: 9,
+	217: 9,
+	218: 9,
+	219: 13,
+	220: 9,
+	221: 9,
+	222: 9,
+	223: 9,
+	224: 9,
+	225: 13,
+	226: 11,
+	227: 11,
+	228: 11,
+	229: 11,
+	230: 11,
+	231: 15,
+	232: 0,
+	233: 0,
+	234: 0,
+	235: 0,
+	236: 0,
+	237: 0,
+	238: 8,
+	239: 8,
+	240: 8,
+	241: 8,
+	242: 8,
+	243: 8,
+	244: 7,
+	245: 7,
+	246: 7,
+	247: 7,
+	248: 7,
+	249: 7,
+	250: 15,
+	251: 15,
+	252: 15,
+	253: 15,
+	254: 15,
+	255: 15,
+}

vendor/github.com/charmbracelet/x/ansi/ctrl.go

@@ -0,0 +1,156 @@
+package ansi
+
+import (
+	"strconv"
+	"strings"
+)
+
+// RequestNameVersion (XTVERSION) is a control sequence that requests the
+// terminal's name and version. It responds with a DSR sequence identifying the
+// terminal.
+//
+//	CSI > 0 q
+//	DCS > | text ST
+//
+// See https://invisible-island.net/xterm/ctlseqs/ctlseqs.html#h3-PC-Style-Function-Keys
+const (
+	RequestNameVersion = "\x1b[>q"
+	XTVERSION          = RequestNameVersion
+)
+
+// RequestXTVersion is a control sequence that requests the terminal's XTVERSION. It responds with a DSR sequence identifying the version.
+//
+//	CSI > Ps q
+//	DCS > | text ST
+//
+// See https://invisible-island.net/xterm/ctlseqs/ctlseqs.html#h3-PC-Style-Function-Keys
+//
+// Deprecated: use [RequestNameVersion] instead.
+const RequestXTVersion = RequestNameVersion
+
+// PrimaryDeviceAttributes (DA1) is a control sequence that reports the
+// terminal's primary device attributes.
+//
+//	CSI c
+//	CSI 0 c
+//	CSI ? Ps ; ... c
+//
+// If no attributes are given, or if the attribute is 0, this function returns
+// the request sequence. Otherwise, it returns the response sequence.
+//
+// Common attributes include:
+//   - 1	132 columns
+//   - 2	Printer port
+//   - 4	Sixel
+//   - 6	Selective erase
+//   - 7	Soft character set (DRCS)
+//   - 8	User-defined keys (UDKs)
+//   - 9	National replacement character sets (NRCS) (International terminal only)
+//   - 12	Yugoslavian (SCS)
+//   - 15	Technical character set
+//   - 18	Windowing capability
+//   - 21	Horizontal scrolling
+//   - 23	Greek
+//   - 24	Turkish
+//   - 42	ISO Latin-2 character set
+//   - 44	PCTerm
+//   - 45	Soft key map
+//   - 46	ASCII emulation
+//
+// See https://vt100.net/docs/vt510-rm/DA1.html
+func PrimaryDeviceAttributes(attrs ...int) string {
+	if len(attrs) == 0 {
+		return RequestPrimaryDeviceAttributes
+	} else if len(attrs) == 1 && attrs[0] == 0 {
+		return "\x1b[0c"
+	}
+
+	as := make([]string, len(attrs))
+	for i, a := range attrs {
+		as[i] = strconv.Itoa(a)
+	}
+	return "\x1b[?" + strings.Join(as, ";") + "c"
+}
+
+// DA1 is an alias for [PrimaryDeviceAttributes].
+func DA1(attrs ...int) string {
+	return PrimaryDeviceAttributes(attrs...)
+}
+
+// RequestPrimaryDeviceAttributes is a control sequence that requests the
+// terminal's primary device attributes (DA1).
+//
+//	CSI c
+//
+// See https://vt100.net/docs/vt510-rm/DA1.html
+const RequestPrimaryDeviceAttributes = "\x1b[c"
+
+// SecondaryDeviceAttributes (DA2) is a control sequence that reports the
+// terminal's secondary device attributes.
+//
+//	CSI > c
+//	CSI > 0 c
+//	CSI > Ps ; ... c
+//
+// See https://vt100.net/docs/vt510-rm/DA2.html
+func SecondaryDeviceAttributes(attrs ...int) string {
+	if len(attrs) == 0 {
+		return RequestSecondaryDeviceAttributes
+	}
+
+	as := make([]string, len(attrs))
+	for i, a := range attrs {
+		as[i] = strconv.Itoa(a)
+	}
+	return "\x1b[>" + strings.Join(as, ";") + "c"
+}
+
+// DA2 is an alias for [SecondaryDeviceAttributes].
+func DA2(attrs ...int) string {
+	return SecondaryDeviceAttributes(attrs...)
+}
+
+// RequestSecondaryDeviceAttributes is a control sequence that requests the
+// terminal's secondary device attributes (DA2).
+//
+//	CSI > c
+//
+// See https://vt100.net/docs/vt510-rm/DA2.html
+const RequestSecondaryDeviceAttributes = "\x1b[>c"
+
+// TertiaryDeviceAttributes (DA3) is a control sequence that reports the
+// terminal's tertiary device attributes.
+//
+//	CSI = c
+//	CSI = 0 c
+//	DCS ! | Text ST
+//
+// Where Text is the unit ID for the terminal.
+//
+// If no unit ID is given, or if the unit ID is 0, this function returns the
+// request sequence. Otherwise, it returns the response sequence.
+//
+// See https://vt100.net/docs/vt510-rm/DA3.html
+func TertiaryDeviceAttributes(unitID string) string {
+	switch unitID {
+	case "":
+		return RequestTertiaryDeviceAttributes
+	case "0":
+		return "\x1b[=0c"
+	}
+
+	return "\x1bP!|" + unitID + "\x1b\\"
+}
+
+// DA3 is an alias for [TertiaryDeviceAttributes].
+func DA3(unitID string) string {
+	return TertiaryDeviceAttributes(unitID)
+}
+
+// RequestTertiaryDeviceAttributes is a control sequence that requests the
+// terminal's tertiary device attributes (DA3).
+//
+//	CSI = c
+//
+// See https://vt100.net/docs/vt510-rm/DA3.html
+const RequestTertiaryDeviceAttributes = "\x1b[=c"

vendor/github.com/charmbracelet/x/ansi/cursor.go

@@ -0,0 +1,635 @@
+package ansi
+
+import (
+	"strconv"
+)
+
+// SaveCursor (DECSC) is an escape sequence that saves the current cursor
+// position.
+//
+//	ESC 7
+//
+// See: https://vt100.net/docs/vt510-rm/DECSC.html
+const (
+	SaveCursor = "\x1b7"
+	DECSC      = SaveCursor
+)
+
+// RestoreCursor (DECRC) is an escape sequence that restores the cursor
+// position.
+//
+//	ESC 8
+//
+// See: https://vt100.net/docs/vt510-rm/DECRC.html
+const (
+	RestoreCursor = "\x1b8"
+	DECRC         = RestoreCursor
+)
+
+// RequestCursorPosition is an escape sequence that requests the current cursor
+// position.
+//
+//	CSI 6 n
+//
+// The terminal will report the cursor position as a CSI sequence in the
+// following format:
+//
+//	CSI Pl ; Pc R
+//
+// Where Pl is the line number and Pc is the column number.
+// See: https://vt100.net/docs/vt510-rm/CPR.html
+//
+// Deprecated: use [RequestCursorPositionReport] instead.
+const RequestCursorPosition = "\x1b[6n"
+
+// RequestExtendedCursorPosition (DECXCPR) is a sequence for requesting the
+// cursor position report including the current page number.
+//
+//	CSI ? 6 n
+//
+// The terminal will report the cursor position as a CSI sequence in the
+// following format:
+//
+//	CSI ? Pl ; Pc ; Pp R
+//
+// Where Pl is the line number, Pc is the column number, and Pp is the page
+// number.
+// See: https://vt100.net/docs/vt510-rm/DECXCPR.html
+//
+// Deprecated: use [RequestExtendedCursorPositionReport] instead.
+const RequestExtendedCursorPosition = "\x1b[?6n"
+
+// CursorUp (CUU) returns a sequence for moving the cursor up n cells.
+//
+//	CSI n A
+//
+// See: https://vt100.net/docs/vt510-rm/CUU.html
+func CursorUp(n int) string {
+	var s string
+	if n > 1 {
+		s = strconv.Itoa(n)
+	}
+	return "\x1b[" + s + "A"
+}
+
+// CUU is an alias for [CursorUp].
+func CUU(n int) string {
+	return CursorUp(n)
+}
+
+// CUU1 is a sequence for moving the cursor up one cell.
+const CUU1 = "\x1b[A"
+
+// CursorUp1 is a sequence for moving the cursor up one cell.
+//
+// This is equivalent to CursorUp(1).
+//
+// Deprecated: use [CUU1] instead.
+const CursorUp1 = "\x1b[A"
+
+// CursorDown (CUD) returns a sequence for moving the cursor down n cells.
+//
+//	CSI n B
+//
+// See: https://vt100.net/docs/vt510-rm/CUD.html
+func CursorDown(n int) string {
+	var s string
+	if n > 1 {
+		s = strconv.Itoa(n)
+	}
+	return "\x1b[" + s + "B"
+}
+
+// CUD is an alias for [CursorDown].
+func CUD(n int) string {
+	return CursorDown(n)
+}
+
+// CUD1 is a sequence for moving the cursor down one cell.
+const CUD1 = "\x1b[B"
+
+// CursorDown1 is a sequence for moving the cursor down one cell.
+//
+// This is equivalent to CursorDown(1).
+//
+// Deprecated: use [CUD1] instead.
+const CursorDown1 = "\x1b[B"
+
+// CursorForward (CUF) returns a sequence for moving the cursor right n cells.
+//
+// # CSI n C
+//
+// See: https://vt100.net/docs/vt510-rm/CUF.html
+func CursorForward(n int) string {
+	var s string
+	if n > 1 {
+		s = strconv.Itoa(n)
+	}
+	return "\x1b[" + s + "C"
+}
+
+// CUF is an alias for [CursorForward].
+func CUF(n int) string {
+	return CursorForward(n)
+}
+
+// CUF1 is a sequence for moving the cursor right one cell.
+const CUF1 = "\x1b[C"
+
+// CursorRight (CUF) returns a sequence for moving the cursor right n cells.
+//
+//	CSI n C
+//
+// See: https://vt100.net/docs/vt510-rm/CUF.html
+//
+// Deprecated: use [CursorForward] instead.
+func CursorRight(n int) string {
+	return CursorForward(n)
+}
+
+// CursorRight1 is a sequence for moving the cursor right one cell.
+//
+// This is equivalent to CursorRight(1).
+//
+// Deprecated: use [CUF1] instead.
+const CursorRight1 = CUF1
+
+// CursorBackward (CUB) returns a sequence for moving the cursor left n cells.
+//
+// # CSI n D
+//
+// See: https://vt100.net/docs/vt510-rm/CUB.html
+func CursorBackward(n int) string {
+	var s string
+	if n > 1 {
+		s = strconv.Itoa(n)
+	}
+	return "\x1b[" + s + "D"
+}
+
+// CUB is an alias for [CursorBackward].
+func CUB(n int) string {
+	return CursorBackward(n)
+}
+
+// CUB1 is a sequence for moving the cursor left one cell.
+const CUB1 = "\x1b[D"
+
+// CursorLeft (CUB) returns a sequence for moving the cursor left n cells.
+//
+//	CSI n D
+//
+// See: https://vt100.net/docs/vt510-rm/CUB.html
+//
+// Deprecated: use [CursorBackward] instead.
+func CursorLeft(n int) string {
+	return CursorBackward(n)
+}
+
+// CursorLeft1 is a sequence for moving the cursor left one cell.
+//
+// This is equivalent to CursorLeft(1).
+//
+// Deprecated: use [CUB1] instead.
+const CursorLeft1 = CUB1
+
+// CursorNextLine (CNL) returns a sequence for moving the cursor to the
+// beginning of the next line n times.
+//
+//	CSI n E
+//
+// See: https://vt100.net/docs/vt510-rm/CNL.html
+func CursorNextLine(n int) string {
+	var s string
+	if n > 1 {
+		s = strconv.Itoa(n)
+	}
+	return "\x1b[" + s + "E"
+}
+
+// CNL is an alias for [CursorNextLine].
+func CNL(n int) string {
+	return CursorNextLine(n)
+}
+
+// CursorPreviousLine (CPL) returns a sequence for moving the cursor to the
+// beginning of the previous line n times.
+//
+//	CSI n F
+//
+// See: https://vt100.net/docs/vt510-rm/CPL.html
+func CursorPreviousLine(n int) string {
+	var s string
+	if n > 1 {
+		s = strconv.Itoa(n)
+	}
+	return "\x1b[" + s + "F"
+}
+
+// CPL is an alias for [CursorPreviousLine].
+func CPL(n int) string {
+	return CursorPreviousLine(n)
+}
+
+// CursorHorizontalAbsolute (CHA) returns a sequence for moving the cursor to
+// the given column.
+//
+// Default is 1.
+//
+//	CSI n G
+//
+// See: https://vt100.net/docs/vt510-rm/CHA.html
+func CursorHorizontalAbsolute(col int) string {
+	var s string
+	if col > 0 {
+		s = strconv.Itoa(col)
+	}
+	return "\x1b[" + s + "G"
+}
+
+// CHA is an alias for [CursorHorizontalAbsolute].
+func CHA(col int) string {
+	return CursorHorizontalAbsolute(col)
+}
+
+// CursorPosition (CUP) returns a sequence for setting the cursor to the
+// given row and column.
+//
+// Default is 1,1.
+//
+//	CSI n ; m H
+//
+// See: https://vt100.net/docs/vt510-rm/CUP.html
+func CursorPosition(col, row int) string {
+	if row <= 0 && col <= 0 {
+		return CursorHomePosition
+	}
+
+	var r, c string
+	if row > 0 {
+		r = strconv.Itoa(row)
+	}
+	if col > 0 {
+		c = strconv.Itoa(col)
+	}
+	return "\x1b[" + r + ";" + c + "H"
+}
+
+// CUP is an alias for [CursorPosition].
+func CUP(col, row int) string {
+	return CursorPosition(col, row)
+}
+
+// CursorHomePosition is a sequence for moving the cursor to the upper left
+// corner of the scrolling region. This is equivalent to `CursorPosition(1, 1)`.
+const CursorHomePosition = "\x1b[H"
+
+// SetCursorPosition (CUP) returns a sequence for setting the cursor to the
+// given row and column.
+//
+//	CSI n ; m H
+//
+// See: https://vt100.net/docs/vt510-rm/CUP.html
+//
+// Deprecated: use [CursorPosition] instead.
+func SetCursorPosition(col, row int) string {
+	if row <= 0 && col <= 0 {
+		return HomeCursorPosition
+	}
+
+	var r, c string
+	if row > 0 {
+		r = strconv.Itoa(row)
+	}
+	if col > 0 {
+		c = strconv.Itoa(col)
+	}
+	return "\x1b[" + r + ";" + c + "H"
+}
+
+// HomeCursorPosition is a sequence for moving the cursor to the upper left
+// corner of the scrolling region. This is equivalent to `SetCursorPosition(1, 1)`.
+//
+// Deprecated: use [CursorHomePosition] instead.
+const HomeCursorPosition = CursorHomePosition
+
+// MoveCursor (CUP) returns a sequence for setting the cursor to the
+// given row and column.
+//
+//	CSI n ; m H
+//
+// See: https://vt100.net/docs/vt510-rm/CUP.html
+//
+// Deprecated: use [CursorPosition] instead.
+func MoveCursor(col, row int) string {
+	return SetCursorPosition(col, row)
+}
+
+// CursorOrigin is a sequence for moving the cursor to the upper left corner of
+// the display. This is equivalent to `SetCursorPosition(1, 1)`.
+//
+// Deprecated: use [CursorHomePosition] instead.
+const CursorOrigin = "\x1b[1;1H"
+
+// MoveCursorOrigin is a sequence for moving the cursor to the upper left
+// corner of the display. This is equivalent to `SetCursorPosition(1, 1)`.
+//
+// Deprecated: use [CursorHomePosition] instead.
+const MoveCursorOrigin = CursorOrigin
+
+// CursorHorizontalForwardTab (CHT) returns a sequence for moving the cursor to
+// the next tab stop n times.
+//
+// Default is 1.
+//
+//	CSI n I
+//
+// See: https://vt100.net/docs/vt510-rm/CHT.html
+func CursorHorizontalForwardTab(n int) string {
+	var s string
+	if n > 1 {
+		s = strconv.Itoa(n)
+	}
+	return "\x1b[" + s + "I"
+}
+
+// CHT is an alias for [CursorHorizontalForwardTab].
+func CHT(n int) string {
+	return CursorHorizontalForwardTab(n)
+}
+
+// EraseCharacter (ECH) returns a sequence for erasing n characters from the
+// screen. This doesn't affect other cell attributes.
+//
+// Default is 1.
+//
+//	CSI n X
+//
+// See: https://vt100.net/docs/vt510-rm/ECH.html
+func EraseCharacter(n int) string {
+	var s string
+	if n > 1 {
+		s = strconv.Itoa(n)
+	}
+	return "\x1b[" + s + "X"
+}
+
+// ECH is an alias for [EraseCharacter].
+func ECH(n int) string {
+	return EraseCharacter(n)
+}
+
+// CursorBackwardTab (CBT) returns a sequence for moving the cursor to the
+// previous tab stop n times.
+//
+// Default is 1.
+//
+//	CSI n Z
+//
+// See: https://vt100.net/docs/vt510-rm/CBT.html
+func CursorBackwardTab(n int) string {
+	var s string
+	if n > 1 {
+		s = strconv.Itoa(n)
+	}
+	return "\x1b[" + s + "Z"
+}
+
+// CBT is an alias for [CursorBackwardTab].
+func CBT(n int) string {
+	return CursorBackwardTab(n)
+}
+
+// VerticalPositionAbsolute (VPA) returns a sequence for moving the cursor to
+// the given row.
+//
+// Default is 1.
+//
+//	CSI n d
+//
+// See: https://vt100.net/docs/vt510-rm/VPA.html
+func VerticalPositionAbsolute(row int) string {
+	var s string
+	if row > 0 {
+		s = strconv.Itoa(row)
+	}
+	return "\x1b[" + s + "d"
+}
+
+// VPA is an alias for [VerticalPositionAbsolute].
+func VPA(row int) string {
+	return VerticalPositionAbsolute(row)
+}
+
+// VerticalPositionRelative (VPR) returns a sequence for moving the cursor down
+// n rows relative to the current position.
+//
+// Default is 1.
+//
+//	CSI n e
+//
+// See: https://vt100.net/docs/vt510-rm/VPR.html
+func VerticalPositionRelative(n int) string {
+	var s string
+	if n > 1 {
+		s = strconv.Itoa(n)
+	}
+	return "\x1b[" + s + "e"
+}
+
+// VPR is an alias for [VerticalPositionRelative].
+func VPR(n int) string {
+	return VerticalPositionRelative(n)
+}
+
+// HorizontalVerticalPosition (HVP) returns a sequence for moving the cursor to
+// the given row and column.
+//
+// Default is 1,1.
+//
+//	CSI n ; m f
+//
+// This has the same effect as [CursorPosition].
+//
+// See: https://vt100.net/docs/vt510-rm/HVP.html
+func HorizontalVerticalPosition(col, row int) string {
+	var r, c string
+	if row > 0 {
+		r = strconv.Itoa(row)
+	}
+	if col > 0 {
+		c = strconv.Itoa(col)
+	}
+	return "\x1b[" + r + ";" + c + "f"
+}
+
+// HVP is an alias for [HorizontalVerticalPosition].
+func HVP(col, row int) string {
+	return HorizontalVerticalPosition(col, row)
+}
+
+// HorizontalVerticalHomePosition is a sequence for moving the cursor to the
+// upper left corner of the scrolling region. This is equivalent to
+// `HorizontalVerticalPosition(1, 1)`.
+const HorizontalVerticalHomePosition = "\x1b[f"
+
+// SaveCurrentCursorPosition (SCOSC) is a sequence for saving the current cursor
+// position for SCO console mode.
+//
+//	CSI s
+//
+// This acts like [DECSC], except the page number where the cursor is located
+// is not saved.
+//
+// See: https://vt100.net/docs/vt510-rm/SCOSC.html
+const (
+	SaveCurrentCursorPosition = "\x1b[s"
+	SCOSC                     = SaveCurrentCursorPosition
+)
+
+// SaveCursorPosition (SCP or SCOSC) is a sequence for saving the cursor
+// position.
+//
+//	CSI s
+//
+// This acts like Save, except the page number where the cursor is located is
+// not saved.
+//
+// See: https://vt100.net/docs/vt510-rm/SCOSC.html
+//
+// Deprecated: use [SaveCurrentCursorPosition] instead.
+const SaveCursorPosition = "\x1b[s"
+
+// RestoreCurrentCursorPosition (SCORC) is a sequence for restoring the current
+// cursor position for SCO console mode.
+//
+//	CSI u
+//
+// This acts like [DECRC], except the page number where the cursor was saved is
+// not restored.
+//
+// See: https://vt100.net/docs/vt510-rm/SCORC.html
+const (
+	RestoreCurrentCursorPosition = "\x1b[u"
+	SCORC                        = RestoreCurrentCursorPosition
+)
+
+// RestoreCursorPosition (RCP or SCORC) is a sequence for restoring the cursor
+// position.
+//
+//	CSI u
+//
+// This acts like Restore, except the cursor stays on the same page where the
+// cursor was saved.
+//
+// See: https://vt100.net/docs/vt510-rm/SCORC.html
+//
+// Deprecated: use [RestoreCurrentCursorPosition] instead.
+const RestoreCursorPosition = "\x1b[u"
+
+// SetCursorStyle (DECSCUSR) returns a sequence for changing the cursor style.
+//
+// Default is 1.
+//
+//	CSI Ps SP q
+//
+// Where Ps is the cursor style:
+//
+//	0: Blinking block
+//	1: Blinking block (default)
+//	2: Steady block
+//	3: Blinking underline
+//	4: Steady underline
+//	5: Blinking bar (xterm)
+//	6: Steady bar (xterm)
+//
+// See: https://vt100.net/docs/vt510-rm/DECSCUSR.html
+// See: https://invisible-island.net/xterm/ctlseqs/ctlseqs.html#h4-Functions-using-CSI-_-ordered-by-the-final-character-lparen-s-rparen:CSI-Ps-SP-q.1D81
+func SetCursorStyle(style int) string {
+	if style < 0 {
+		style = 0
+	}
+	return "\x1b[" + strconv.Itoa(style) + " q"
+}
+
+// DECSCUSR is an alias for [SetCursorStyle].
+func DECSCUSR(style int) string {
+	return SetCursorStyle(style)
+}
+
+// SetPointerShape returns a sequence for changing the mouse pointer cursor
+// shape. Use "default" for the default pointer shape.
+//
+//	OSC 22 ; Pt ST
+//	OSC 22 ; Pt BEL
+//
+// Where Pt is the pointer shape name. The name can be anything that the
+// operating system can understand. Some common names are:
+//
+//   - copy
+//   - crosshair
+//   - default
+//   - ew-resize
+//   - n-resize
+//   - text
+//   - wait
+//
+// See: https://invisible-island.net/xterm/ctlseqs/ctlseqs.html#h2-Operating-System-Commands
+func SetPointerShape(shape string) string {
+	return "\x1b]22;" + shape + "\x07"
+}
+
+// ReverseIndex (RI) is an escape sequence for moving the cursor up one line in
+// the same column. If the cursor is at the top margin, the screen scrolls
+// down.
+//
+// This has the same effect as [RI].
+const ReverseIndex = "\x1bM"
+
+// HorizontalPositionAbsolute (HPA) returns a sequence for moving the cursor to
+// the given column. This has the same effect as [CUP].
+//
+// Default is 1.
+//
+//	CSI n \`
+//
+// See: https://vt100.net/docs/vt510-rm/HPA.html
+func HorizontalPositionAbsolute(col int) string {
+	var s string
+	if col > 0 {
+		s = strconv.Itoa(col)
+	}
+	return "\x1b[" + s + "`"
+}
+
+// HPA is an alias for [HorizontalPositionAbsolute].
+func HPA(col int) string {
+	return HorizontalPositionAbsolute(col)
+}
+
+// HorizontalPositionRelative (HPR) returns a sequence for moving the cursor
+// right n columns relative to the current position. This has the same effect
+// as [CUP].
+//
+// Default is 1.
+//
+//	CSI n a
+//
+// See: https://vt100.net/docs/vt510-rm/HPR.html
+func HorizontalPositionRelative(n int) string {
+	var s string
+	if n > 0 {
+		s = strconv.Itoa(n)
+	}
+	return "\x1b[" + s + "a"
+}
+
+// HPR is an alias for [HorizontalPositionRelative].
+func HPR(n int) string {
+	return HorizontalPositionRelative(n)
+}
+
+// Index (IND) is an escape sequence for moving the cursor down one line in the
+// same column. If the cursor is at the bottom margin, the screen scrolls up.
+// This has the same effect as [IND].
+const Index = "\x1bD"

vendor/github.com/charmbracelet/x/ansi/cwd.go

@@ -0,0 +1,26 @@
+package ansi
+
+import (
+	"net/url"
+	"path"
+)
+
+// NotifyWorkingDirectory returns a sequence that notifies the terminal
+// of the current working directory.
+//
+//	OSC 7 ; Pt BEL
+//
+// Where Pt is a URL in the format "file://[host]/[path]".
+// Set host to "localhost" if this is a path on the local computer.
+//
+// See: https://wezfurlong.org/wezterm/shell-integration.html#osc-7-escape-sequence-to-set-the-working-directory
+// See: https://iterm2.com/documentation-escape-codes.html#:~:text=RemoteHost%20and%20CurrentDir%3A-,OSC%207,-%3B%20%5BPs%5D%20ST
+func NotifyWorkingDirectory(host string, paths ...string) string {
+	path := path.Join(paths...)
+	u := &url.URL{
+		Scheme: "file",
+		Host:   host,
+		Path:   path,
+	}
+	return "\x1b]7;" + u.String() + "\x07"
+}

vendor/github.com/charmbracelet/x/ansi/doc.go

@@ -0,0 +1,7 @@
+// Package ansi defines common ANSI escape sequences based on the ECMA-48
+// specs.
+//
+// All sequences use 7-bit C1 control codes, which are supported by most
+// terminal emulators. OSC sequences are terminated by a BEL for wider
+// compatibility with terminals.
+package ansi

vendor/github.com/charmbracelet/x/ansi/finalterm.go

@@ -0,0 +1,67 @@
+package ansi
+
+import "strings"
+
+// FinalTerm returns an escape sequence that is used for shell integrations.
+// Originally, FinalTerm designed the protocol hence the name.
+//
+//	OSC 133 ; Ps ; Pm ST
+//	OSC 133 ; Ps ; Pm BEL
+//
+// See: https://iterm2.com/documentation-shell-integration.html
+func FinalTerm(pm ...string) string {
+	return "\x1b]133;" + strings.Join(pm, ";") + "\x07"
+}
+
+// FinalTermPrompt returns an escape sequence that is used for shell
+// integrations prompt marks. This is sent just before the start of the shell
+// prompt.
+//
+// This is an alias for FinalTerm("A").
+func FinalTermPrompt(pm ...string) string {
+	if len(pm) == 0 {
+		return FinalTerm("A")
+	}
+	return FinalTerm(append([]string{"A"}, pm...)...)
+}
+
+// FinalTermCmdStart returns an escape sequence that is used for shell
+// integrations command start marks. This is sent just after the end of the
+// shell prompt, before the user enters a command.
+//
+// This is an alias for FinalTerm("B").
+func FinalTermCmdStart(pm ...string) string {
+	if len(pm) == 0 {
+		return FinalTerm("B")
+	}
+	return FinalTerm(append([]string{"B"}, pm...)...)
+}
+
+// FinalTermCmdExecuted returns an escape sequence that is used for shell
+// integrations command executed marks. This is sent just before the start of
+// the command output.
+//
+// This is an alias for FinalTerm("C").
+func FinalTermCmdExecuted(pm ...string) string {
+	if len(pm) == 0 {
+		return FinalTerm("C")
+	}
+	return FinalTerm(append([]string{"C"}, pm...)...)
+}
+
+// FinalTermCmdFinished returns an escape sequence that is used for shell
+// integrations command finished marks.
+//
+// If the command was sent after
+// [FinalTermCmdStart], it indicates that the command was aborted. If the
+// command was sent after [FinalTermCmdExecuted], it indicates the end of the
+// command output. If neither was sent, [FinalTermCmdFinished] should be
+// ignored.
+//
+// This is an alias for FinalTerm("D").
+func FinalTermCmdFinished(pm ...string) string {
+	if len(pm) == 0 {
+		return FinalTerm("D")
+	}
+	return FinalTerm(append([]string{"D"}, pm...)...)
+}

vendor/github.com/charmbracelet/x/ansi/focus.go

@@ -0,0 +1,9 @@
+package ansi
+
+// Focus is an escape sequence to notify the terminal that it has focus.
+// This is used with [FocusEventMode].
+const Focus = "\x1b[I"
+
+// Blur is an escape sequence to notify the terminal that it has lost focus.
+// This is used with [FocusEventMode].
+const Blur = "\x1b[O"

vendor/github.com/charmbracelet/x/ansi/graphics.go

@@ -0,0 +1,62 @@
+package ansi
+
+import (
+	"bytes"
+	"strconv"
+	"strings"
+)
+
+// SixelGraphics returns a sequence that encodes the given sixel image payload to
+// a DCS sixel sequence.
+//
+//	DCS p1; p2; p3; q [sixel payload] ST
+//
+// p1 = pixel aspect ratio, deprecated and replaced by pixel metrics in the payload
+//
+// p2 = This is supposed to be 0 for transparency, but terminals don't seem to
+// to use it properly. Value 0 leaves an unsightly black bar on all terminals
+// I've tried and looks correct with value 1.
+//
+// p3 = Horizontal grid size parameter. Everyone ignores this and uses a fixed grid
+// size, as far as I can tell.
+//
+// See https://shuford.invisible-island.net/all_about_sixels.txt
+func SixelGraphics(p1, p2, p3 int, payload []byte) string {
+	var buf bytes.Buffer
+
+	buf.WriteString("\x1bP")
+	if p1 >= 0 {
+		buf.WriteString(strconv.Itoa(p1))
+	}
+	buf.WriteByte(';')
+	if p2 >= 0 {
+		buf.WriteString(strconv.Itoa(p2))
+	}
+	if p3 > 0 {
+		buf.WriteByte(';')
+		buf.WriteString(strconv.Itoa(p3))
+	}
+	buf.WriteByte('q')
+	buf.Write(payload)
+	buf.WriteString("\x1b\\")
+
+	return buf.String()
+}
+
+// KittyGraphics returns a sequence that encodes the given image in the Kitty
+// graphics protocol.
+//
+//	APC G [comma separated options] ; [base64 encoded payload] ST
+//
+// See https://sw.kovidgoyal.net/kitty/graphics-protocol/
+func KittyGraphics(payload []byte, opts ...string) string {
+	var buf bytes.Buffer
+	buf.WriteString("\x1b_G")
+	buf.WriteString(strings.Join(opts, ","))
+	if len(payload) > 0 {
+		buf.WriteString(";")
+		buf.Write(payload)
+	}
+	buf.WriteString("\x1b\\")
+	return buf.String()
+}

vendor/github.com/charmbracelet/x/ansi/hyperlink.go

@@ -0,0 +1,28 @@
+package ansi
+
+import "strings"
+
+// SetHyperlink returns a sequence for starting a hyperlink.
+//
+//	OSC 8 ; Params ; Uri ST
+//	OSC 8 ; Params ; Uri BEL
+//
+// To reset the hyperlink, omit the URI.
+//
+// See: https://gist.github.com/egmontkob/eb114294efbcd5adb1944c9f3cb5feda
+func SetHyperlink(uri string, params ...string) string {
+	var p string
+	if len(params) > 0 {
+		p = strings.Join(params, ":")
+	}
+	return "\x1b]8;" + p + ";" + uri + "\x07"
+}
+
+// ResetHyperlink returns a sequence for resetting the hyperlink.
+//
+// This is equivalent to SetHyperlink("", params...).
+//
+// See: https://gist.github.com/egmontkob/eb114294efbcd5adb1944c9f3cb5feda
+func ResetHyperlink(params ...string) string {
+	return SetHyperlink("", params...)
+}

vendor/github.com/charmbracelet/x/ansi/iterm2.go

@@ -0,0 +1,18 @@
+package ansi
+
+import "fmt"
+
+// ITerm2 returns a sequence that uses the iTerm2 proprietary protocol. Use the
+// iterm2 package for a more convenient API.
+//
+//	OSC 1337 ; key = value ST
+//
+// Example:
+//
+//	ITerm2(iterm2.File{...})
+//
+// See https://iterm2.com/documentation-escape-codes.html
+// See https://iterm2.com/documentation-images.html
+func ITerm2(data any) string {
+	return "\x1b]1337;" + fmt.Sprint(data) + "\x07"
+}

vendor/github.com/charmbracelet/x/ansi/keypad.go

@@ -0,0 +1,28 @@
+package ansi
+
+// Keypad Application Mode (DECKPAM) is a mode that determines whether the
+// keypad sends application sequences or ANSI sequences.
+//
+// This works like enabling [DECNKM].
+// Use [NumericKeypadMode] to set the numeric keypad mode.
+//
+//	ESC =
+//
+// See: https://vt100.net/docs/vt510-rm/DECKPAM.html
+const (
+	KeypadApplicationMode = "\x1b="
+	DECKPAM               = KeypadApplicationMode
+)
+
+// Keypad Numeric Mode (DECKPNM) is a mode that determines whether the keypad
+// sends application sequences or ANSI sequences.
+//
+// This works the same as disabling [DECNKM].
+//
+//	ESC >
+//
+// See: https://vt100.net/docs/vt510-rm/DECKPNM.html
+const (
+	KeypadNumericMode = "\x1b>"
+	DECKPNM           = KeypadNumericMode
+)

vendor/github.com/charmbracelet/x/ansi/kitty.go

@@ -0,0 +1,90 @@
+package ansi
+
+import "strconv"
+
+// Kitty keyboard protocol progressive enhancement flags.
+// See: https://sw.kovidgoyal.net/kitty/keyboard-protocol/#progressive-enhancement
+const (
+	KittyDisambiguateEscapeCodes = 1 << iota
+	KittyReportEventTypes
+	KittyReportAlternateKeys
+	KittyReportAllKeysAsEscapeCodes
+	KittyReportAssociatedKeys
+
+	KittyAllFlags = KittyDisambiguateEscapeCodes | KittyReportEventTypes |
+		KittyReportAlternateKeys | KittyReportAllKeysAsEscapeCodes | KittyReportAssociatedKeys
+)
+
+// RequestKittyKeyboard is a sequence to request the terminal Kitty keyboard
+// protocol enabled flags.
+//
+// See: https://sw.kovidgoyal.net/kitty/keyboard-protocol/
+const RequestKittyKeyboard = "\x1b[?u"
+
+// KittyKeyboard returns a sequence to request keyboard enhancements from the terminal.
+// The flags argument is a bitmask of the Kitty keyboard protocol flags. While
+// mode specifies how the flags should be interpreted.
+//
+// Possible values for flags mask:
+//
+//	1:  Disambiguate escape codes
+//	2:  Report event types
+//	4:  Report alternate keys
+//	8:  Report all keys as escape codes
+//	16: Report associated text
+//
+// Possible values for mode:
+//
+//	1: Set given flags and unset all others
+//	2: Set given flags and keep existing flags unchanged
+//	3: Unset given flags and keep existing flags unchanged
+//
+// See https://sw.kovidgoyal.net/kitty/keyboard-protocol/#progressive-enhancement
+func KittyKeyboard(flags, mode int) string {
+	return "\x1b[=" + strconv.Itoa(flags) + ";" + strconv.Itoa(mode) + "u"
+}
+
+// PushKittyKeyboard returns a sequence to push the given flags to the terminal
+// Kitty Keyboard stack.
+//
+// Possible values for flags mask:
+//
+//	0:  Disable all features
+//	1:  Disambiguate escape codes
+//	2:  Report event types
+//	4:  Report alternate keys
+//	8:  Report all keys as escape codes
+//	16: Report associated text
+//
+//	CSI > flags u
+//
+// See https://sw.kovidgoyal.net/kitty/keyboard-protocol/#progressive-enhancement
+func PushKittyKeyboard(flags int) string {
+	var f string
+	if flags > 0 {
+		f = strconv.Itoa(flags)
+	}
+
+	return "\x1b[>" + f + "u"
+}
+
+// DisableKittyKeyboard is a sequence to push zero into the terminal Kitty
+// Keyboard stack to disable the protocol.
+//
+// This is equivalent to PushKittyKeyboard(0).
+const DisableKittyKeyboard = "\x1b[>u"
+
+// PopKittyKeyboard returns a sequence to pop n number of flags from the
+// terminal Kitty Keyboard stack.
+//
+//	CSI < flags u
+//
+// See https://sw.kovidgoyal.net/kitty/keyboard-protocol/#progressive-enhancement
+func PopKittyKeyboard(n int) string {
+	var num string
+	if n > 0 {
+		num = strconv.Itoa(n)
+	}
+
+	return "\x1b[<" + num + "u"
+}

vendor/github.com/charmbracelet/x/ansi/method.go

@@ -0,0 +1,172 @@
+package ansi
+
+// Method is a type that represents the how the renderer should calculate the
+// display width of cells.
+type Method uint8
+
+// Display width modes.
+const (
+	WcWidth Method = iota
+	GraphemeWidth
+)
+
+// StringWidth returns the width of a string in cells. This is the number of
+// cells that the string will occupy when printed in a terminal. ANSI escape
+// codes are ignored and wide characters (such as East Asians and emojis) are
+// accounted for.
+func (m Method) StringWidth(s string) int {
+	return stringWidth(m, s)
+}
+
+// Truncate truncates a string to a given length, adding a tail to the end if
+// the string is longer than the given length. This function is aware of ANSI
+// escape codes and will not break them, and accounts for wide-characters (such
+// as East-Asian characters and emojis).
+func (m Method) Truncate(s string, length int, tail string) string {
+	return truncate(m, s, length, tail)
+}
+
+// TruncateLeft truncates a string to a given length, adding a prefix to the
+// beginning if the string is longer than the given length. This function is
+// aware of ANSI escape codes and will not break them, and accounts for
+// wide-characters (such as East-Asian characters and emojis).
+func (m Method) TruncateLeft(s string, length int, prefix string) string {
+	return truncateLeft(m, s, length, prefix)
+}
+
+// Cut the string, without adding any prefix or tail strings. This function is
+// aware of ANSI escape codes and will not break them, and accounts for
+// wide-characters (such as East-Asian characters and emojis). Note that the
+// [left] parameter is inclusive, while [right] isn't.
+func (m Method) Cut(s string, left, right int) string {
+	return cut(m, s, left, right)
+}
+
+// Hardwrap wraps a string or a block of text to a given line length, breaking
+// word boundaries. This will preserve ANSI escape codes and will account for
+// wide-characters in the string.
+// When preserveSpace is true, spaces at the beginning of a line will be
+// preserved.
+// This treats the text as a sequence of graphemes.
+func (m Method) Hardwrap(s string, length int, preserveSpace bool) string {
+	return hardwrap(m, s, length, preserveSpace)
+}
+
+// Wordwrap wraps a string or a block of text to a given line length, not
+// breaking word boundaries. This will preserve ANSI escape codes and will
+// account for wide-characters in the string.
+// The breakpoints string is a list of characters that are considered
+// breakpoints for word wrapping. A hyphen (-) is always considered a
+// breakpoint.
+//
+// Note: breakpoints must be a string of 1-cell wide rune characters.
+func (m Method) Wordwrap(s string, length int, breakpoints string) string {
+	return wordwrap(m, s, length, breakpoints)
+}
+
+// Wrap wraps a string or a block of text to a given line length, breaking word
+// boundaries if necessary. This will preserve ANSI escape codes and will
+// account for wide-characters in the string. The breakpoints string is a list
+// of characters that are considered breakpoints for word wrapping. A hyphen
+// (-) is always considered a breakpoint.
+//
+// Note: breakpoints must be a string of 1-cell wide rune characters.
+func (m Method) Wrap(s string, length int, breakpoints string) string {
+	return wrap(m, s, length, breakpoints)
+}
+
+// DecodeSequence decodes the first ANSI escape sequence or a printable
+// grapheme from the given data. It returns the sequence slice, the number of
+// bytes read, the cell width for each sequence, and the new state.
+//
+// The cell width will always be 0 for control and escape sequences, 1 for
+// ASCII printable characters, and the number of cells other Unicode characters
+// occupy. It uses the uniseg package to calculate the width of Unicode
+// graphemes and characters. This means it will always do grapheme clustering
+// (mode 2027).
+//
+// Passing a non-nil [*Parser] as the last argument will allow the decoder to
+// collect sequence parameters, data, and commands. The parser cmd will have
+// the packed command value that contains intermediate and prefix characters.
+// In the case of a OSC sequence, the cmd will be the OSC command number. Use
+// [Cmd] and [Param] types to unpack command intermediates and prefixes as well
+// as parameters.
+//
+// Zero [Cmd] means the CSI, DCS, or ESC sequence is invalid. Moreover, checking the
+// validity of other data sequences, OSC, DCS, etc, will require checking for
+// the returned sequence terminator bytes such as ST (ESC \\) and BEL).
+//
+// We store the command byte in [Cmd] in the most significant byte, the
+// prefix byte in the next byte, and the intermediate byte in the least
+// significant byte. This is done to avoid using a struct to store the command
+// and its intermediates and prefixes. The command byte is always the least
+// significant byte i.e. [Cmd & 0xff]. Use the [Cmd] type to unpack the
+// command, intermediate, and prefix bytes. Note that we only collect the last
+// prefix character and intermediate byte.
+//
+// The [p.Params] slice will contain the parameters of the sequence. Any
+// sub-parameter will have the [parser.HasMoreFlag] set. Use the [Param] type
+// to unpack the parameters.
+//
+// Example:
+//
+//	var state byte // the initial state is always zero [NormalState]
+//	p := NewParser(32, 1024) // create a new parser with a 32 params buffer and 1024 data buffer (optional)
+//	input := []byte("\x1b[31mHello, World!\x1b[0m")
+//	for len(input) > 0 {
+//		seq, width, n, newState := DecodeSequence(input, state, p)
+//		log.Printf("seq: %q, width: %d", seq, width)
+//		state = newState
+//		input = input[n:]
+//	}
+func (m Method) DecodeSequence(data []byte, state byte, p *Parser) (seq []byte, width, n int, newState byte) {
+	return decodeSequence(m, data, state, p)
+}
+
+// DecodeSequenceInString decodes the first ANSI escape sequence or a printable
+// grapheme from the given data. It returns the sequence slice, the number of
+// bytes read, the cell width for each sequence, and the new state.
+//
+// The cell width will always be 0 for control and escape sequences, 1 for
+// ASCII printable characters, and the number of cells other Unicode characters
+// occupy. It uses the uniseg package to calculate the width of Unicode
+// graphemes and characters. This means it will always do grapheme clustering
+// (mode 2027).
+//
+// Passing a non-nil [*Parser] as the last argument will allow the decoder to
+// collect sequence parameters, data, and commands. The parser cmd will have
+// the packed command value that contains intermediate and prefix characters.
+// In the case of a OSC sequence, the cmd will be the OSC command number. Use
+// [Cmd] and [Param] types to unpack command intermediates and prefixes as well
+// as parameters.
+//
+// Zero [Cmd] means the CSI, DCS, or ESC sequence is invalid. Moreover, checking the
+// validity of other data sequences, OSC, DCS, etc, will require checking for
+// the returned sequence terminator bytes such as ST (ESC \\) and BEL).
+//
+// We store the command byte in [Cmd] in the most significant byte, the
+// prefix byte in the next byte, and the intermediate byte in the least
+// significant byte. This is done to avoid using a struct to store the command
+// and its intermediates and prefixes. The command byte is always the least
+// significant byte i.e. [Cmd & 0xff]. Use the [Cmd] type to unpack the
+// command, intermediate, and prefix bytes. Note that we only collect the last
+// prefix character and intermediate byte.
+//
+// The [p.Params] slice will contain the parameters of the sequence. Any
+// sub-parameter will have the [parser.HasMoreFlag] set. Use the [Param] type
+// to unpack the parameters.
+//
+// Example:
+//
+//	var state byte // the initial state is always zero [NormalState]
+//	p := NewParser(32, 1024) // create a new parser with a 32 params buffer and 1024 data buffer (optional)
+//	input := []byte("\x1b[31mHello, World!\x1b[0m")
+//	for len(input) > 0 {
+//		seq, width, n, newState := DecodeSequenceInString(input, state, p)
+//		log.Printf("seq: %q, width: %d", seq, width)
+//		state = newState
+//		input = input[n:]
+//	}
+func (m Method) DecodeSequenceInString(data string, state byte, p *Parser) (seq string, width, n int, newState byte) {
+	return decodeSequence(m, data, state, p)
+}

vendor/github.com/charmbracelet/x/ansi/mode.go

@@ -0,0 +1,847 @@
+package ansi
+
+import (
+	"strconv"
+	"strings"
+)
+
+// ModeSetting represents a mode setting.
+type ModeSetting byte
+
+// ModeSetting constants.
+const (
+	ModeNotRecognized ModeSetting = iota
+	ModeSet
+	ModeReset
+	ModePermanentlySet
+	ModePermanentlyReset
+)
+
+// IsNotRecognized returns true if the mode is not recognized.
+func (m ModeSetting) IsNotRecognized() bool {
+	return m == ModeNotRecognized
+}
+
+// IsSet returns true if the mode is set or permanently set.
+func (m ModeSetting) IsSet() bool {
+	return m == ModeSet || m == ModePermanentlySet
+}
+
+// IsReset returns true if the mode is reset or permanently reset.
+func (m ModeSetting) IsReset() bool {
+	return m == ModeReset || m == ModePermanentlyReset
+}
+
+// IsPermanentlySet returns true if the mode is permanently set.
+func (m ModeSetting) IsPermanentlySet() bool {
+	return m == ModePermanentlySet
+}
+
+// IsPermanentlyReset returns true if the mode is permanently reset.
+func (m ModeSetting) IsPermanentlyReset() bool {
+	return m == ModePermanentlyReset
+}
+
+// Mode represents an interface for terminal modes.
+// Modes can be set, reset, and requested.
+type Mode interface {
+	Mode() int
+}
+
+// SetMode (SM) or (DECSET) returns a sequence to set a mode.
+// The mode arguments are a list of modes to set.
+//
+// If one of the modes is a [DECMode], the function will returns two escape
+// sequences.
+//
+// ANSI format:
+//
+//	CSI Pd ; ... ; Pd h
+//
+// DEC format:
+//
+//	CSI ? Pd ; ... ; Pd h
+//
+// See: https://vt100.net/docs/vt510-rm/SM.html
+func SetMode(modes ...Mode) string {
+	return setMode(false, modes...)
+}
+
+// SM is an alias for [SetMode].
+func SM(modes ...Mode) string {
+	return SetMode(modes...)
+}
+
+// DECSET is an alias for [SetMode].
+func DECSET(modes ...Mode) string {
+	return SetMode(modes...)
+}
+
+// ResetMode (RM) or (DECRST) returns a sequence to reset a mode.
+// The mode arguments are a list of modes to reset.
+//
+// If one of the modes is a [DECMode], the function will returns two escape
+// sequences.
+//
+// ANSI format:
+//
+//	CSI Pd ; ... ; Pd l
+//
+// DEC format:
+//
+//	CSI ? Pd ; ... ; Pd l
+//
+// See: https://vt100.net/docs/vt510-rm/RM.html
+func ResetMode(modes ...Mode) string {
+	return setMode(true, modes...)
+}
+
+// RM is an alias for [ResetMode].
+func RM(modes ...Mode) string {
+	return ResetMode(modes...)
+}
+
+// DECRST is an alias for [ResetMode].
+func DECRST(modes ...Mode) string {
+	return ResetMode(modes...)
+}
+
+func setMode(reset bool, modes ...Mode) (s string) {
+	if len(modes) == 0 {
+		return //nolint:nakedret
+	}
+
+	cmd := "h"
+	if reset {
+		cmd = "l"
+	}
+
+	seq := "\x1b["
+	if len(modes) == 1 {
+		switch modes[0].(type) {
+		case DECMode:
+			seq += "?"
+		}
+		return seq + strconv.Itoa(modes[0].Mode()) + cmd
+	}
+
+	dec := make([]string, 0, len(modes)/2)
+	ansi := make([]string, 0, len(modes)/2)
+	for _, m := range modes {
+		switch m.(type) {
+		case DECMode:
+			dec = append(dec, strconv.Itoa(m.Mode()))
+		case ANSIMode:
+			ansi = append(ansi, strconv.Itoa(m.Mode()))
+		}
+	}
+
+	if len(ansi) > 0 {
+		s += seq + strings.Join(ansi, ";") + cmd
+	}
+	if len(dec) > 0 {
+		s += seq + "?" + strings.Join(dec, ";") + cmd
+	}
+	return //nolint:nakedret
+}
+
+// RequestMode (DECRQM) returns a sequence to request a mode from the terminal.
+// The terminal responds with a report mode function [DECRPM].
+//
+// ANSI format:
+//
+//	CSI Pa $ p
+//
+// DEC format:
+//
+//	CSI ? Pa $ p
+//
+// See: https://vt100.net/docs/vt510-rm/DECRQM.html
+func RequestMode(m Mode) string {
+	seq := "\x1b["
+	switch m.(type) {
+	case DECMode:
+		seq += "?"
+	}
+	return seq + strconv.Itoa(m.Mode()) + "$p"
+}
+
+// DECRQM is an alias for [RequestMode].
+func DECRQM(m Mode) string {
+	return RequestMode(m)
+}
+
+// ReportMode (DECRPM) returns a sequence that the terminal sends to the host
+// in response to a mode request [DECRQM].
+//
+// ANSI format:
+//
+//	CSI Pa ; Ps ; $ y
+//
+// DEC format:
+//
+//	CSI ? Pa ; Ps $ y
+//
+// Where Pa is the mode number, and Ps is the mode value.
+//
+//	0: Not recognized
+//	1: Set
+//	2: Reset
+//	3: Permanent set
+//	4: Permanent reset
+//
+// See: https://vt100.net/docs/vt510-rm/DECRPM.html
+func ReportMode(mode Mode, value ModeSetting) string {
+	if value > 4 {
+		value = 0
+	}
+	switch mode.(type) {
+	case DECMode:
+		return "\x1b[?" + strconv.Itoa(mode.Mode()) + ";" + strconv.Itoa(int(value)) + "$y"
+	}
+	return "\x1b[" + strconv.Itoa(mode.Mode()) + ";" + strconv.Itoa(int(value)) + "$y"
+}
+
+// DECRPM is an alias for [ReportMode].
+func DECRPM(mode Mode, value ModeSetting) string {
+	return ReportMode(mode, value)
+}
+
+// ANSIMode represents an ANSI terminal mode.
+type ANSIMode int //nolint:revive
+
+// Mode returns the ANSI mode as an integer.
+func (m ANSIMode) Mode() int {
+	return int(m)
+}
+
+// DECMode represents a private DEC terminal mode.
+type DECMode int
+
+// Mode returns the DEC mode as an integer.
+func (m DECMode) Mode() int {
+	return int(m)
+}
+
+// Keyboard Action Mode (KAM) is a mode that controls locking of the keyboard.
+// When the keyboard is locked, it cannot send data to the terminal.
+//
+// See: https://vt100.net/docs/vt510-rm/KAM.html
+const (
+	KeyboardActionMode = ANSIMode(2)
+	KAM                = KeyboardActionMode
+
+	SetKeyboardActionMode     = "\x1b[2h"
+	ResetKeyboardActionMode   = "\x1b[2l"
+	RequestKeyboardActionMode = "\x1b[2$p"
+)
+
+// Insert/Replace Mode (IRM) is a mode that determines whether characters are
+// inserted or replaced when typed.
+//
+// When enabled, characters are inserted at the cursor position pushing the
+// characters to the right. When disabled, characters replace the character at
+// the cursor position.
+//
+// See: https://vt100.net/docs/vt510-rm/IRM.html
+const (
+	InsertReplaceMode = ANSIMode(4)
+	IRM               = InsertReplaceMode
+
+	SetInsertReplaceMode     = "\x1b[4h"
+	ResetInsertReplaceMode   = "\x1b[4l"
+	RequestInsertReplaceMode = "\x1b[4$p"
+)
+
+// BiDirectional Support Mode (BDSM) is a mode that determines whether the
+// terminal supports bidirectional text. When enabled, the terminal supports
+// bidirectional text and is set to implicit bidirectional mode. When disabled,
+// the terminal does not support bidirectional text.
+//
+// See ECMA-48 7.2.1.
+const (
+	BiDirectionalSupportMode = ANSIMode(8)
+	BDSM                     = BiDirectionalSupportMode
+
+	SetBiDirectionalSupportMode     = "\x1b[8h"
+	ResetBiDirectionalSupportMode   = "\x1b[8l"
+	RequestBiDirectionalSupportMode = "\x1b[8$p"
+)
+
+// Send Receive Mode (SRM) or Local Echo Mode is a mode that determines whether
+// the terminal echoes characters back to the host. When enabled, the terminal
+// sends characters to the host as they are typed.
+//
+// See: https://vt100.net/docs/vt510-rm/SRM.html
+const (
+	SendReceiveMode = ANSIMode(12)
+	LocalEchoMode   = SendReceiveMode
+	SRM             = SendReceiveMode
+
+	SetSendReceiveMode     = "\x1b[12h"
+	ResetSendReceiveMode   = "\x1b[12l"
+	RequestSendReceiveMode = "\x1b[12$p"
+
+	SetLocalEchoMode     = "\x1b[12h"
+	ResetLocalEchoMode   = "\x1b[12l"
+	RequestLocalEchoMode = "\x1b[12$p"
+)
+
+// Line Feed/New Line Mode (LNM) is a mode that determines whether the terminal
+// interprets the line feed character as a new line.
+//
+// When enabled, the terminal interprets the line feed character as a new line.
+// When disabled, the terminal interprets the line feed character as a line feed.
+//
+// A new line moves the cursor to the first position of the next line.
+// A line feed moves the cursor down one line without changing the column
+// scrolling the screen if necessary.
+//
+// See: https://vt100.net/docs/vt510-rm/LNM.html
+const (
+	LineFeedNewLineMode = ANSIMode(20)
+	LNM                 = LineFeedNewLineMode
+
+	SetLineFeedNewLineMode     = "\x1b[20h"
+	ResetLineFeedNewLineMode   = "\x1b[20l"
+	RequestLineFeedNewLineMode = "\x1b[20$p"
+)
+
+// Cursor Keys Mode (DECCKM) is a mode that determines whether the cursor keys
+// send ANSI cursor sequences or application sequences.
+//
+// See: https://vt100.net/docs/vt510-rm/DECCKM.html
+const (
+	CursorKeysMode = DECMode(1)
+	DECCKM         = CursorKeysMode
+
+	SetCursorKeysMode     = "\x1b[?1h"
+	ResetCursorKeysMode   = "\x1b[?1l"
+	RequestCursorKeysMode = "\x1b[?1$p"
+)
+
+// Deprecated: use [SetCursorKeysMode] and [ResetCursorKeysMode] instead.
+const (
+	EnableCursorKeys  = "\x1b[?1h" //nolint:revive // grouped constants
+	DisableCursorKeys = "\x1b[?1l"
+)
+
+// Origin Mode (DECOM) is a mode that determines whether the cursor moves to the
+// home position or the margin position.
+//
+// See: https://vt100.net/docs/vt510-rm/DECOM.html
+const (
+	OriginMode = DECMode(6)
+	DECOM      = OriginMode
+
+	SetOriginMode     = "\x1b[?6h"
+	ResetOriginMode   = "\x1b[?6l"
+	RequestOriginMode = "\x1b[?6$p"
+)
+
+// Auto Wrap Mode (DECAWM) is a mode that determines whether the cursor wraps
+// to the next line when it reaches the right margin.
+//
+// See: https://vt100.net/docs/vt510-rm/DECAWM.html
+const (
+	AutoWrapMode = DECMode(7)
+	DECAWM       = AutoWrapMode
+
+	SetAutoWrapMode     = "\x1b[?7h"
+	ResetAutoWrapMode   = "\x1b[?7l"
+	RequestAutoWrapMode = "\x1b[?7$p"
+)
+
+// X10 Mouse Mode is a mode that determines whether the mouse reports on button
+// presses.
+//
+// The terminal responds with the following encoding:
+//
+//	CSI M CbCxCy
+//
+// Where Cb is the button-1, where it can be 1, 2, or 3.
+// Cx and Cy are the x and y coordinates of the mouse event.
+//
+// See: https://invisible-island.net/xterm/ctlseqs/ctlseqs.html#h2-Mouse-Tracking
+const (
+	X10MouseMode = DECMode(9)
+
+	SetX10MouseMode     = "\x1b[?9h"
+	ResetX10MouseMode   = "\x1b[?9l"
+	RequestX10MouseMode = "\x1b[?9$p"
+)
+
+// Text Cursor Enable Mode (DECTCEM) is a mode that shows/hides the cursor.
+//
+// See: https://vt100.net/docs/vt510-rm/DECTCEM.html
+const (
+	TextCursorEnableMode = DECMode(25)
+	DECTCEM              = TextCursorEnableMode
+
+	SetTextCursorEnableMode     = "\x1b[?25h"
+	ResetTextCursorEnableMode   = "\x1b[?25l"
+	RequestTextCursorEnableMode = "\x1b[?25$p"
+)
+
+// These are aliases for [SetTextCursorEnableMode] and [ResetTextCursorEnableMode].
+const (
+	ShowCursor = SetTextCursorEnableMode
+	HideCursor = ResetTextCursorEnableMode
+)
+
+// Text Cursor Enable Mode (DECTCEM) is a mode that shows/hides the cursor.
+//
+// See: https://vt100.net/docs/vt510-rm/DECTCEM.html
+//
+// Deprecated: use [SetTextCursorEnableMode] and [ResetTextCursorEnableMode] instead.
+const (
+	CursorEnableMode        = DECMode(25)
+	RequestCursorVisibility = "\x1b[?25$p"
+)
+
+// Numeric Keypad Mode (DECNKM) is a mode that determines whether the keypad
+// sends application sequences or numeric sequences.
+//
+// This works like [DECKPAM] and [DECKPNM], but uses different sequences.
+//
+// See: https://vt100.net/docs/vt510-rm/DECNKM.html
+const (
+	NumericKeypadMode = DECMode(66)
+	DECNKM            = NumericKeypadMode
+
+	SetNumericKeypadMode     = "\x1b[?66h"
+	ResetNumericKeypadMode   = "\x1b[?66l"
+	RequestNumericKeypadMode = "\x1b[?66$p"
+)
+
+// Backarrow Key Mode (DECBKM) is a mode that determines whether the backspace
+// key sends a backspace or delete character. Disabled by default.
+//
+// See: https://vt100.net/docs/vt510-rm/DECBKM.html
+const (
+	BackarrowKeyMode = DECMode(67)
+	DECBKM           = BackarrowKeyMode
+
+	SetBackarrowKeyMode     = "\x1b[?67h"
+	ResetBackarrowKeyMode   = "\x1b[?67l"
+	RequestBackarrowKeyMode = "\x1b[?67$p"
+)
+
+// Left Right Margin Mode (DECLRMM) is a mode that determines whether the left
+// and right margins can be set with [DECSLRM].
+//
+// See: https://vt100.net/docs/vt510-rm/DECLRMM.html
+const (
+	LeftRightMarginMode = DECMode(69)
+	DECLRMM             = LeftRightMarginMode
+
+	SetLeftRightMarginMode     = "\x1b[?69h"
+	ResetLeftRightMarginMode   = "\x1b[?69l"
+	RequestLeftRightMarginMode = "\x1b[?69$p"
+)
+
+// Normal Mouse Mode is a mode that determines whether the mouse reports on
+// button presses and releases. It will also report modifier keys, wheel
+// events, and extra buttons.
+//
+// It uses the same encoding as [X10MouseMode] with a few differences:
+//
+// See: https://invisible-island.net/xterm/ctlseqs/ctlseqs.html#h2-Mouse-Tracking
+const (
+	NormalMouseMode = DECMode(1000)
+
+	SetNormalMouseMode     = "\x1b[?1000h"
+	ResetNormalMouseMode   = "\x1b[?1000l"
+	RequestNormalMouseMode = "\x1b[?1000$p"
+)
+
+// VT Mouse Tracking is a mode that determines whether the mouse reports on
+// button press and release.
+//
+// See: https://invisible-island.net/xterm/ctlseqs/ctlseqs.html#h2-Mouse-Tracking
+//
+// Deprecated: use [NormalMouseMode] instead.
+const (
+	MouseMode = DECMode(1000)
+
+	EnableMouse  = "\x1b[?1000h"
+	DisableMouse = "\x1b[?1000l"
+	RequestMouse = "\x1b[?1000$p"
+)
+
+// Highlight Mouse Tracking is a mode that determines whether the mouse reports
+// on button presses, releases, and highlighted cells.
+//
+// It uses the same encoding as [NormalMouseMode] with a few differences:
+//
+// On highlight events, the terminal responds with the following encoding:
+//
+//	CSI t CxCy
+//	CSI T CxCyCxCyCxCy
+//
+// Where the parameters are startx, starty, endx, endy, mousex, and mousey.
+const (
+	HighlightMouseMode = DECMode(1001)
+
+	SetHighlightMouseMode     = "\x1b[?1001h"
+	ResetHighlightMouseMode   = "\x1b[?1001l"
+	RequestHighlightMouseMode = "\x1b[?1001$p"
+)
+
+// VT Hilite Mouse Tracking is a mode that determines whether the mouse reports on
+// button presses, releases, and highlighted cells.
+//
+// See: https://invisible-island.net/xterm/ctlseqs/ctlseqs.html#h2-Mouse-Tracking
+//
+// Deprecated: use [HighlightMouseMode] instead.
+const (
+	MouseHiliteMode = DECMode(1001)
+
+	EnableMouseHilite  = "\x1b[?1001h"
+	DisableMouseHilite = "\x1b[?1001l"
+	RequestMouseHilite = "\x1b[?1001$p"
+)
+
+// Button Event Mouse Tracking is essentially the same as [NormalMouseMode],
+// but it also reports button-motion events when a button is pressed.
+//
+// See: https://invisible-island.net/xterm/ctlseqs/ctlseqs.html#h2-Mouse-Tracking
+const (
+	ButtonEventMouseMode = DECMode(1002)
+
+	SetButtonEventMouseMode     = "\x1b[?1002h"
+	ResetButtonEventMouseMode   = "\x1b[?1002l"
+	RequestButtonEventMouseMode = "\x1b[?1002$p"
+)
+
+// Cell Motion Mouse Tracking is a mode that determines whether the mouse
+// reports on button press, release, and motion events.
+//
+// See: https://invisible-island.net/xterm/ctlseqs/ctlseqs.html#h2-Mouse-Tracking
+//
+// Deprecated: use [ButtonEventMouseMode] instead.
+const (
+	MouseCellMotionMode = DECMode(1002)
+
+	EnableMouseCellMotion  = "\x1b[?1002h"
+	DisableMouseCellMotion = "\x1b[?1002l"
+	RequestMouseCellMotion = "\x1b[?1002$p"
+)
+
+// Any Event Mouse Tracking is the same as [ButtonEventMouseMode], except that
+// all motion events are reported even if no mouse buttons are pressed.
+//
+// See: https://invisible-island.net/xterm/ctlseqs/ctlseqs.html#h2-Mouse-Tracking
+const (
+	AnyEventMouseMode = DECMode(1003)
+
+	SetAnyEventMouseMode     = "\x1b[?1003h"
+	ResetAnyEventMouseMode   = "\x1b[?1003l"
+	RequestAnyEventMouseMode = "\x1b[?1003$p"
+)
+
+// All Mouse Tracking is a mode that determines whether the mouse reports on
+// button press, release, motion, and highlight events.
+//
+// See: https://invisible-island.net/xterm/ctlseqs/ctlseqs.html#h2-Mouse-Tracking
+//
+// Deprecated: use [AnyEventMouseMode] instead.
+const (
+	MouseAllMotionMode = DECMode(1003)
+
+	EnableMouseAllMotion  = "\x1b[?1003h"
+	DisableMouseAllMotion = "\x1b[?1003l"
+	RequestMouseAllMotion = "\x1b[?1003$p"
+)
+
+// Focus Event Mode is a mode that determines whether the terminal reports focus
+// and blur events.
+//
+// The terminal sends the following encoding:
+//
+//	CSI I // Focus In
+//	CSI O // Focus Out
+//
+// See: https://invisible-island.net/xterm/ctlseqs/ctlseqs.html#h2-Focus-Tracking
+const (
+	FocusEventMode = DECMode(1004)
+
+	SetFocusEventMode     = "\x1b[?1004h"
+	ResetFocusEventMode   = "\x1b[?1004l"
+	RequestFocusEventMode = "\x1b[?1004$p"
+)
+
+// Deprecated: use [SetFocusEventMode], [ResetFocusEventMode], and
+// [RequestFocusEventMode] instead.
+// Focus reporting mode constants.
+const (
+	ReportFocusMode = DECMode(1004) //nolint:revive // grouped constants
+
+	EnableReportFocus  = "\x1b[?1004h"
+	DisableReportFocus = "\x1b[?1004l"
+	RequestReportFocus = "\x1b[?1004$p"
+)
+
+// SGR Extended Mouse Mode is a mode that changes the mouse tracking encoding
+// to use SGR parameters.
+//
+// The terminal responds with the following encoding:
+//
+//	CSI < Cb ; Cx ; Cy M
+//
+// Where Cb is the same as [NormalMouseMode], and Cx and Cy are the x and y.
+//
+// See: https://invisible-island.net/xterm/ctlseqs/ctlseqs.html#h2-Mouse-Tracking
+const (
+	SgrExtMouseMode = DECMode(1006)
+
+	SetSgrExtMouseMode     = "\x1b[?1006h"
+	ResetSgrExtMouseMode   = "\x1b[?1006l"
+	RequestSgrExtMouseMode = "\x1b[?1006$p"
+)
+
+// Deprecated: use [SgrExtMouseMode] [SetSgrExtMouseMode],
+// [ResetSgrExtMouseMode], and [RequestSgrExtMouseMode] instead.
+const (
+	MouseSgrExtMode    = DECMode(1006) //nolint:revive // grouped constants
+	EnableMouseSgrExt  = "\x1b[?1006h"
+	DisableMouseSgrExt = "\x1b[?1006l"
+	RequestMouseSgrExt = "\x1b[?1006$p"
+)
+
+// UTF-8 Extended Mouse Mode is a mode that changes the mouse tracking encoding
+// to use UTF-8 parameters.
+//
+// See: https://invisible-island.net/xterm/ctlseqs/ctlseqs.html#h2-Mouse-Tracking
+const (
+	Utf8ExtMouseMode = DECMode(1005)
+
+	SetUtf8ExtMouseMode     = "\x1b[?1005h"
+	ResetUtf8ExtMouseMode   = "\x1b[?1005l"
+	RequestUtf8ExtMouseMode = "\x1b[?1005$p"
+)
+
+// URXVT Extended Mouse Mode is a mode that changes the mouse tracking encoding
+// to use an alternate encoding.
+//
+// See: https://invisible-island.net/xterm/ctlseqs/ctlseqs.html#h2-Mouse-Tracking
+const (
+	UrxvtExtMouseMode = DECMode(1015)
+
+	SetUrxvtExtMouseMode     = "\x1b[?1015h"
+	ResetUrxvtExtMouseMode   = "\x1b[?1015l"
+	RequestUrxvtExtMouseMode = "\x1b[?1015$p"
+)
+
+// SGR Pixel Extended Mouse Mode is a mode that changes the mouse tracking
+// encoding to use SGR parameters with pixel coordinates.
+//
+// This is similar to [SgrExtMouseMode], but also reports pixel coordinates.
+//
+// See: https://invisible-island.net/xterm/ctlseqs/ctlseqs.html#h2-Mouse-Tracking
+const (
+	SgrPixelExtMouseMode = DECMode(1016)
+
+	SetSgrPixelExtMouseMode     = "\x1b[?1016h"
+	ResetSgrPixelExtMouseMode   = "\x1b[?1016l"
+	RequestSgrPixelExtMouseMode = "\x1b[?1016$p"
+)
+
+// Alternate Screen Mode is a mode that determines whether the alternate screen
+// buffer is active. When this mode is enabled, the alternate screen buffer is
+// cleared.
+//
+// See: https://invisible-island.net/xterm/ctlseqs/ctlseqs.html#h2-The-Alternate-Screen-Buffer
+const (
+	AltScreenMode = DECMode(1047)
+
+	SetAltScreenMode     = "\x1b[?1047h"
+	ResetAltScreenMode   = "\x1b[?1047l"
+	RequestAltScreenMode = "\x1b[?1047$p"
+)
+
+// Save Cursor Mode is a mode that saves the cursor position.
+// This is equivalent to [SaveCursor] and [RestoreCursor].
+//
+// See: https://invisible-island.net/xterm/ctlseqs/ctlseqs.html#h2-The-Alternate-Screen-Buffer
+const (
+	SaveCursorMode = DECMode(1048)
+
+	SetSaveCursorMode     = "\x1b[?1048h"
+	ResetSaveCursorMode   = "\x1b[?1048l"
+	RequestSaveCursorMode = "\x1b[?1048$p"
+)
+
+// Alternate Screen Save Cursor Mode is a mode that saves the cursor position as in
+// [SaveCursorMode], switches to the alternate screen buffer as in [AltScreenMode],
+// and clears the screen on switch.
+//
+// See: https://invisible-island.net/xterm/ctlseqs/ctlseqs.html#h2-The-Alternate-Screen-Buffer
+const (
+	AltScreenSaveCursorMode = DECMode(1049)
+
+	SetAltScreenSaveCursorMode     = "\x1b[?1049h"
+	ResetAltScreenSaveCursorMode   = "\x1b[?1049l"
+	RequestAltScreenSaveCursorMode = "\x1b[?1049$p"
+)
+
+// Alternate Screen Buffer is a mode that determines whether the alternate screen
+// buffer is active.
+//
+// See: https://invisible-island.net/xterm/ctlseqs/ctlseqs.html#h2-The-Alternate-Screen-Buffer
+//
+// Deprecated: use [AltScreenSaveCursorMode] instead.
+const (
+	AltScreenBufferMode = DECMode(1049)
+
+	SetAltScreenBufferMode     = "\x1b[?1049h"
+	ResetAltScreenBufferMode   = "\x1b[?1049l"
+	RequestAltScreenBufferMode = "\x1b[?1049$p"
+
+	EnableAltScreenBuffer  = "\x1b[?1049h"
+	DisableAltScreenBuffer = "\x1b[?1049l"
+	RequestAltScreenBuffer = "\x1b[?1049$p"
+)
+
+// Bracketed Paste Mode is a mode that determines whether pasted text is
+// bracketed with escape sequences.
+//
+// See: https://cirw.in/blog/bracketed-paste
+// See: https://invisible-island.net/xterm/ctlseqs/ctlseqs.html#h2-Bracketed-Paste-Mode
+const (
+	BracketedPasteMode = DECMode(2004)
+
+	SetBracketedPasteMode     = "\x1b[?2004h"
+	ResetBracketedPasteMode   = "\x1b[?2004l"
+	RequestBracketedPasteMode = "\x1b[?2004$p"
+)
+
+// Deprecated: use [SetBracketedPasteMode], [ResetBracketedPasteMode], and
+// [RequestBracketedPasteMode] instead.
+const (
+	EnableBracketedPaste  = "\x1b[?2004h" //nolint:revive // grouped constants
+	DisableBracketedPaste = "\x1b[?2004l"
+	RequestBracketedPaste = "\x1b[?2004$p"
+)
+
+// Synchronized Output Mode is a mode that determines whether output is
+// synchronized with the terminal.
+//
+// See: https://gist.github.com/christianparpart/d8a62cc1ab659194337d73e399004036
+const (
+	SynchronizedOutputMode = DECMode(2026)
+
+	SetSynchronizedOutputMode     = "\x1b[?2026h"
+	ResetSynchronizedOutputMode   = "\x1b[?2026l"
+	RequestSynchronizedOutputMode = "\x1b[?2026$p"
+)
+
+// Synchronized Output Mode. See [SynchronizedOutputMode].
+//
+// Deprecated: use [SynchronizedOutputMode], [SetSynchronizedOutputMode], and
+// [ResetSynchronizedOutputMode], and [RequestSynchronizedOutputMode] instead.
+const (
+	SyncdOutputMode = DECMode(2026)
+
+	EnableSyncdOutput  = "\x1b[?2026h"
+	DisableSyncdOutput = "\x1b[?2026l"
+	RequestSyncdOutput = "\x1b[?2026$p"
+)
+
+// Unicode Core Mode is a mode that determines whether the terminal should use
+// Unicode grapheme clustering to calculate the width of glyphs for each
+// terminal cell.
+//
+// See: https://github.com/contour-terminal/terminal-unicode-core
+const (
+	UnicodeCoreMode = DECMode(2027)
+
+	SetUnicodeCoreMode     = "\x1b[?2027h"
+	ResetUnicodeCoreMode   = "\x1b[?2027l"
+	RequestUnicodeCoreMode = "\x1b[?2027$p"
+)
+
+// Grapheme Clustering Mode is a mode that determines whether the terminal
+// should look for grapheme clusters instead of single runes in the rendered
+// text. This makes the terminal properly render combining characters such as
+// emojis.
+//
+// See: https://github.com/contour-terminal/terminal-unicode-core
+//
+// Deprecated: use [GraphemeClusteringMode], [SetUnicodeCoreMode],
+// [ResetUnicodeCoreMode], and [RequestUnicodeCoreMode] instead.
+const (
+	GraphemeClusteringMode = DECMode(2027)
+
+	SetGraphemeClusteringMode     = "\x1b[?2027h"
+	ResetGraphemeClusteringMode   = "\x1b[?2027l"
+	RequestGraphemeClusteringMode = "\x1b[?2027$p"
+)
+
+// Grapheme Clustering Mode. See [GraphemeClusteringMode].
+//
+// Deprecated: use [SetUnicodeCoreMode], [ResetUnicodeCoreMode], and
+// [RequestUnicodeCoreMode] instead.
+const (
+	EnableGraphemeClustering  = "\x1b[?2027h"
+	DisableGraphemeClustering = "\x1b[?2027l"
+	RequestGraphemeClustering = "\x1b[?2027$p"
+)
+
+// LightDarkMode is a mode that enables reporting the operating system's color
+// scheme (light or dark) preference. It reports the color scheme as a [DSR]
+// and [LightDarkReport] escape sequences encoded as follows:
+//
+//	CSI ? 997 ; 1 n   for dark mode
+//	CSI ? 997 ; 2 n   for light mode
+//
+// The color preference can also be requested via the following [DSR] and
+// [RequestLightDarkReport] escape sequences:
+//
+//	CSI ? 996 n
+//
+// See: https://contour-terminal.org/vt-extensions/color-palette-update-notifications/
+const (
+	LightDarkMode = DECMode(2031)
+
+	SetLightDarkMode     = "\x1b[?2031h"
+	ResetLightDarkMode   = "\x1b[?2031l"
+	RequestLightDarkMode = "\x1b[?2031$p"
+)
+
+// InBandResizeMode is a mode that reports terminal resize events as escape
+// sequences. This is useful for systems that do not support [SIGWINCH] like
+// Windows.
+//
+// The terminal then sends the following encoding:
+//
+//	CSI 48 ; cellsHeight ; cellsWidth ; pixelHeight ; pixelWidth t
+//
+// See: https://gist.github.com/rockorager/e695fb2924d36b2bcf1fff4a3704bd83
+const (
+	InBandResizeMode = DECMode(2048)
+
+	SetInBandResizeMode     = "\x1b[?2048h"
+	ResetInBandResizeMode   = "\x1b[?2048l"
+	RequestInBandResizeMode = "\x1b[?2048$p"
+)
+
+// Win32Input is a mode that determines whether input is processed by the
+// Win32 console and Conpty.
+//
+// See: https://github.com/microsoft/terminal/blob/main/doc/specs/%234999%20-%20Improved%20keyboard%20handling%20in%20Conpty.md
+const (
+	Win32InputMode = DECMode(9001)
+
+	SetWin32InputMode     = "\x1b[?9001h"
+	ResetWin32InputMode   = "\x1b[?9001l"
+	RequestWin32InputMode = "\x1b[?9001$p"
+)
+
+// Deprecated: use [SetWin32InputMode], [ResetWin32InputMode], and
+// [RequestWin32InputMode] instead.
+const (
+	EnableWin32Input  = "\x1b[?9001h" //nolint:revive // grouped constants
+	DisableWin32Input = "\x1b[?9001l"
+	RequestWin32Input = "\x1b[?9001$p"
+)

vendor/github.com/charmbracelet/x/ansi/modes.go

@@ -0,0 +1,65 @@
+package ansi
+
+// Modes represents the terminal modes that can be set or reset. By default,
+// all modes are [ModeNotRecognized].
+type Modes map[Mode]ModeSetting
+
+// Get returns the setting of a terminal mode. If the mode is not set, it
+// returns [ModeNotRecognized].
+func (m Modes) Get(mode Mode) ModeSetting {
+	return m[mode]
+}
+
+// Delete deletes a terminal mode. This has the same effect as setting the mode
+// to [ModeNotRecognized].
+func (m Modes) Delete(mode Mode) {
+	delete(m, mode)
+}
+
+// Set sets a terminal mode to [ModeSet].
+func (m Modes) Set(modes ...Mode) {
+	for _, mode := range modes {
+		m[mode] = ModeSet
+	}
+}
+
+// PermanentlySet sets a terminal mode to [ModePermanentlySet].
+func (m Modes) PermanentlySet(modes ...Mode) {
+	for _, mode := range modes {
+		m[mode] = ModePermanentlySet
+	}
+}
+
+// Reset sets a terminal mode to [ModeReset].
+func (m Modes) Reset(modes ...Mode) {
+	for _, mode := range modes {
+		m[mode] = ModeReset
+	}
+}
+
+// PermanentlyReset sets a terminal mode to [ModePermanentlyReset].
+func (m Modes) PermanentlyReset(modes ...Mode) {
+	for _, mode := range modes {
+		m[mode] = ModePermanentlyReset
+	}
+}
+
+// IsSet returns true if the mode is set to [ModeSet] or [ModePermanentlySet].
+func (m Modes) IsSet(mode Mode) bool {
+	return m[mode].IsSet()
+}
+
+// IsPermanentlySet returns true if the mode is set to [ModePermanentlySet].
+func (m Modes) IsPermanentlySet(mode Mode) bool {
+	return m[mode].IsPermanentlySet()
+}
+
+// IsReset returns true if the mode is set to [ModeReset] or [ModePermanentlyReset].
+func (m Modes) IsReset(mode Mode) bool {
+	return m[mode].IsReset()
+}
+
+// IsPermanentlyReset returns true if the mode is set to [ModePermanentlyReset].
+func (m Modes) IsPermanentlyReset(mode Mode) bool {
+	return m[mode].IsPermanentlyReset()
+}

vendor/github.com/charmbracelet/x/ansi/mouse.go

@@ -0,0 +1,172 @@
+package ansi
+
+import (
+	"fmt"
+)
+
+// MouseButton represents the button that was pressed during a mouse message.
+type MouseButton byte
+
+// Mouse event buttons
+//
+// This is based on X11 mouse button codes.
+//
+//	1 = left button
+//	2 = middle button (pressing the scroll wheel)
+//	3 = right button
+//	4 = turn scroll wheel up
+//	5 = turn scroll wheel down
+//	6 = push scroll wheel left
+//	7 = push scroll wheel right
+//	8 = 4th button (aka browser backward button)
+//	9 = 5th button (aka browser forward button)
+//	10
+//	11
+//
+// Other buttons are not supported.
+const (
+	MouseNone MouseButton = iota
+	MouseButton1
+	MouseButton2
+	MouseButton3
+	MouseButton4
+	MouseButton5
+	MouseButton6
+	MouseButton7
+	MouseButton8
+	MouseButton9
+	MouseButton10
+	MouseButton11
+
+	MouseLeft       = MouseButton1
+	MouseMiddle     = MouseButton2
+	MouseRight      = MouseButton3
+	MouseWheelUp    = MouseButton4
+	MouseWheelDown  = MouseButton5
+	MouseWheelLeft  = MouseButton6
+	MouseWheelRight = MouseButton7
+	MouseBackward   = MouseButton8
+	MouseForward    = MouseButton9
+	MouseRelease    = MouseNone
+)
+
+var mouseButtons = map[MouseButton]string{
+	MouseNone:       "none",
+	MouseLeft:       "left",
+	MouseMiddle:     "middle",
+	MouseRight:      "right",
+	MouseWheelUp:    "wheelup",
+	MouseWheelDown:  "wheeldown",
+	MouseWheelLeft:  "wheelleft",
+	MouseWheelRight: "wheelright",
+	MouseBackward:   "backward",
+	MouseForward:    "forward",
+	MouseButton10:   "button10",
+	MouseButton11:   "button11",
+}
+
+// String returns a string representation of the mouse button.
+func (b MouseButton) String() string {
+	return mouseButtons[b]
+}
+
+// EncodeMouseButton returns a byte representing a mouse button.
+// The button is a bitmask of the following leftmost values:
+//
+//   - The first two bits are the button number:
+//     0 = left button, wheel up, or button no. 8 aka (backwards)
+//     1 = middle button, wheel down, or button no. 9 aka (forwards)
+//     2 = right button, wheel left, or button no. 10
+//     3 = release event, wheel right, or button no. 11
+//
+//   - The third bit indicates whether the shift key was pressed.
+//
+//   - The fourth bit indicates the alt key was pressed.
+//
+//   - The fifth bit indicates the control key was pressed.
+//
+//   - The sixth bit indicates motion events. Combined with button number 3, i.e.
+//     release event, it represents a drag event.
+//
+//   - The seventh bit indicates a wheel event.
+//
+//   - The eighth bit indicates additional buttons.
+//
+// If button is [MouseNone], and motion is false, this returns a release event.
+// If button is undefined, this function returns 0xff.
+func EncodeMouseButton(b MouseButton, motion, shift, alt, ctrl bool) (m byte) {
+	// mouse bit shifts
+	const (
+		bitShift  = 0b0000_0100
+		bitAlt    = 0b0000_1000
+		bitCtrl   = 0b0001_0000
+		bitMotion = 0b0010_0000
+		bitWheel  = 0b0100_0000
+		bitAdd    = 0b1000_0000 // additional buttons 8-11
+
+		bitsMask = 0b0000_0011
+	)
+
+	if b == MouseNone {
+		m = bitsMask
+	} else if b >= MouseLeft && b <= MouseRight {
+		m = byte(b - MouseLeft)
+	} else if b >= MouseWheelUp && b <= MouseWheelRight {
+		m = byte(b - MouseWheelUp)
+		m |= bitWheel
+	} else if b >= MouseBackward && b <= MouseButton11 {
+		m = byte(b - MouseBackward)
+		m |= bitAdd
+	} else {
+		m = 0xff // invalid button
+	}
+
+	if shift {
+		m |= bitShift
+	}
+	if alt {
+		m |= bitAlt
+	}
+	if ctrl {
+		m |= bitCtrl
+	}
+	if motion {
+		m |= bitMotion
+	}
+
+	return //nolint:nakedret
+}
+
+// x10Offset is the offset for X10 mouse events.
+// See https://invisible-island.net/xterm/ctlseqs/ctlseqs.html#Mouse%20Tracking
+const x10Offset = 32
+
+// MouseX10 returns an escape sequence representing a mouse event in X10 mode.
+// Note that this requires the terminal support X10 mouse modes.
+//
+//	CSI M Cb Cx Cy
+//
+// See: https://invisible-island.net/xterm/ctlseqs/ctlseqs.html#Mouse%20Tracking
+func MouseX10(b byte, x, y int) string {
+	return "\x1b[M" + string(b+x10Offset) + string(byte(x)+x10Offset+1) + string(byte(y)+x10Offset+1)
+}
+
+// MouseSgr returns an escape sequence representing a mouse event in SGR mode.
+//
+//	CSI < Cb ; Cx ; Cy M
+//	CSI < Cb ; Cx ; Cy m (release)
+//
+// See: https://invisible-island.net/xterm/ctlseqs/ctlseqs.html#Mouse%20Tracking
+func MouseSgr(b byte, x, y int, release bool) string {
+	s := 'M'
+	if release {
+		s = 'm'
+	}
+	if x < 0 {
+		x = -x
+	}
+	if y < 0 {
+		y = -y
+	}
+	return fmt.Sprintf("\x1b[<%d;%d;%d%c", b, x+1, y+1, s)
+}

vendor/github.com/charmbracelet/x/ansi/notification.go

@@ -0,0 +1,13 @@
+package ansi
+
+// Notify sends a desktop notification using iTerm's OSC 9.
+//
+//	OSC 9 ; Mc ST
+//	OSC 9 ; Mc BEL
+//
+// Where Mc is the notification body.
+//
+// See: https://iterm2.com/documentation-escape-codes.html
+func Notify(s string) string {
+	return "\x1b]9;" + s + "\x07"
+}

vendor/github.com/charmbracelet/x/ansi/parser.go

@@ -0,0 +1,417 @@
+package ansi
+
+import (
+	"unicode/utf8"
+	"unsafe"
+
+	"github.com/charmbracelet/x/ansi/parser"
+)
+
+// Parser represents a DEC ANSI compatible sequence parser.
+//
+// It uses a state machine to parse ANSI escape sequences and control
+// characters. The parser is designed to be used with a terminal emulator or
+// similar application that needs to parse ANSI escape sequences and control
+// characters.
+// See package [parser] for more information.
+//
+//go:generate go run ./gen.go
+type Parser struct {
+	handler Handler
+
+	// params contains the raw parameters of the sequence.
+	// These parameters used when constructing CSI and DCS sequences.
+	params []int
+
+	// data contains the raw data of the sequence.
+	// These data used when constructing OSC, DCS, SOS, PM, and APC sequences.
+	data []byte
+
+	// dataLen keeps track of the length of the data buffer.
+	// If dataLen is -1, the data buffer is unlimited and will grow as needed.
+	// Otherwise, dataLen is limited by the size of the data buffer.
+	dataLen int
+
+	// paramsLen keeps track of the number of parameters.
+	// This is limited by the size of the params buffer.
+	//
+	// This is also used when collecting UTF-8 runes to keep track of the
+	// number of rune bytes collected.
+	paramsLen int
+
+	// cmd contains the raw command along with the private prefix and
+	// intermediate bytes of the sequence.
+	// The first lower byte contains the command byte, the next byte contains
+	// the private prefix, and the next byte contains the intermediate byte.
+	//
+	// This is also used when collecting UTF-8 runes treating it as a slice of
+	// 4 bytes.
+	cmd int
+
+	// state is the current state of the parser.
+	state byte
+}
+
+// NewParser returns a new parser with the default settings.
+// The [Parser] uses a default size of 32 for the parameters and 64KB for the
+// data buffer. Use [Parser.SetParamsSize] and [Parser.SetDataSize] to set the
+// size of the parameters and data buffer respectively.
+func NewParser() *Parser {
+	p := new(Parser)
+	p.SetParamsSize(parser.MaxParamsSize)
+	p.SetDataSize(1024 * 64) // 64KB data buffer
+	return p
+}
+
+// SetParamsSize sets the size of the parameters buffer.
+// This is used when constructing CSI and DCS sequences.
+func (p *Parser) SetParamsSize(size int) {
+	p.params = make([]int, size)
+}
+
+// SetDataSize sets the size of the data buffer.
+// This is used when constructing OSC, DCS, SOS, PM, and APC sequences.
+// If size is less than or equal to 0, the data buffer is unlimited and will
+// grow as needed.
+func (p *Parser) SetDataSize(size int) {
+	if size <= 0 {
+		size = 0
+		p.dataLen = -1
+	}
+	p.data = make([]byte, size)
+}
+
+// Params returns the list of parsed packed parameters.
+func (p *Parser) Params() Params {
+	return unsafe.Slice((*Param)(unsafe.Pointer(&p.params[0])), p.paramsLen)
+}
+
+// Param returns the parameter at the given index and falls back to the default
+// value if the parameter is missing. If the index is out of bounds, it returns
+// the default value and false.
+func (p *Parser) Param(i, def int) (int, bool) {
+	if i < 0 || i >= p.paramsLen {
+		return def, false
+	}
+	return Param(p.params[i]).Param(def), true
+}
+
+// Command returns the packed command of the last dispatched sequence. Use
+// [Cmd] to unpack the command.
+func (p *Parser) Command() int {
+	return p.cmd
+}
+
+// Rune returns the last dispatched sequence as a rune.
+func (p *Parser) Rune() rune {
+	rw := utf8ByteLen(byte(p.cmd & 0xff))
+	if rw == -1 {
+		return utf8.RuneError
+	}
+	r, _ := utf8.DecodeRune((*[utf8.UTFMax]byte)(unsafe.Pointer(&p.cmd))[:rw])
+	return r
+}
+
+// Control returns the last dispatched sequence as a control code.
+func (p *Parser) Control() byte {
+	return byte(p.cmd & 0xff)
+}
+
+// Data returns the raw data of the last dispatched sequence.
+func (p *Parser) Data() []byte {
+	return p.data[:p.dataLen]
+}
+
+// Reset resets the parser to its initial state.
+func (p *Parser) Reset() {
+	p.clear()
+	p.state = parser.GroundState
+}
+
+// clear clears the parser parameters and command.
+func (p *Parser) clear() {
+	if len(p.params) > 0 {
+		p.params[0] = parser.MissingParam
+	}
+	p.paramsLen = 0
+	p.cmd = 0
+}
+
+// State returns the current state of the parser.
+func (p *Parser) State() parser.State {
+	return p.state
+}
+
+// StateName returns the name of the current state.
+func (p *Parser) StateName() string {
+	return parser.StateNames[p.state]
+}
+
+// Parse parses the given dispatcher and byte buffer.
+// Deprecated: Loop over the buffer and call [Parser.Advance] instead.
+func (p *Parser) Parse(b []byte) {
+	for i := range b {
+		p.Advance(b[i])
+	}
+}
+
+// Advance advances the parser using the given byte. It	returns the action
+// performed by the parser.
+func (p *Parser) Advance(b byte) parser.Action {
+	switch p.state {
+	case parser.Utf8State:
+		// We handle UTF-8 here.
+		return p.advanceUtf8(b)
+	default:
+		return p.advance(b)
+	}
+}
+
+func (p *Parser) collectRune(b byte) {
+	if p.paramsLen >= utf8.UTFMax {
+		return
+	}
+
+	shift := p.paramsLen * 8
+	p.cmd &^= 0xff << shift
+	p.cmd |= int(b) << shift
+	p.paramsLen++
+}
+
+func (p *Parser) advanceUtf8(b byte) parser.Action {
+	// Collect UTF-8 rune bytes.
+	p.collectRune(b)
+	rw := utf8ByteLen(byte(p.cmd & 0xff))
+	if rw == -1 {
+		// We panic here because the first byte comes from the state machine,
+		// if this panics, it means there is a bug in the state machine!
+		panic("invalid rune") // unreachable
+	}
+
+	if p.paramsLen < rw {
+		return parser.CollectAction
+	}
+
+	// We have enough bytes to decode the rune using unsafe
+	if p.handler.Print != nil {
+		p.handler.Print(p.Rune())
+	}
+
+	p.state = parser.GroundState
+	p.paramsLen = 0
+
+	return parser.PrintAction
+}
+
+func (p *Parser) advance(b byte) parser.Action {
+	state, action := parser.Table.Transition(p.state, b)
+
+	// We need to clear the parser state if the state changes from EscapeState.
+	// This is because when we enter the EscapeState, we don't get a chance to
+	// clear the parser state. For example, when a sequence terminates with a
+	// ST (\x1b\\ or \x9c), we dispatch the current sequence and transition to
+	// EscapeState. However, the parser state is not cleared in this case and
+	// we need to clear it here before dispatching the esc sequence.
+	if p.state != state {
+		if p.state == parser.EscapeState {
+			p.performAction(parser.ClearAction, state, b)
+		}
+		if action == parser.PutAction &&
+			p.state == parser.DcsEntryState && state == parser.DcsStringState {
+			// XXX: This is a special case where we need to start collecting
+			// non-string parameterized data i.e. doesn't follow the ECMA-48 §
+			// 5.4.1 string parameters format.
+			p.performAction(parser.StartAction, state, 0)
+		}
+	}
+
+	// Handle special cases
+	switch {
+	case b == ESC && p.state == parser.EscapeState:
+		// Two ESCs in a row
+		p.performAction(parser.ExecuteAction, state, b)
+	default:
+		p.performAction(action, state, b)
+	}
+
+	p.state = state
+
+	return action
+}
+
+func (p *Parser) parseStringCmd() {
+	// Try to parse the command
+	datalen := len(p.data)
+	if p.dataLen >= 0 {
+		datalen = p.dataLen
+	}
+	for i := range datalen {
+		d := p.data[i]
+		if d < '0' || d > '9' {
+			break
+		}
+		if p.cmd == parser.MissingCommand {
+			p.cmd = 0
+		}
+		p.cmd *= 10
+		p.cmd += int(d - '0')
+	}
+}
+
+func (p *Parser) performAction(action parser.Action, state parser.State, b byte) {
+	switch action {
+	case parser.IgnoreAction:
+		break
+
+	case parser.ClearAction:
+		p.clear()
+
+	case parser.PrintAction:
+		p.cmd = int(b)
+		if p.handler.Print != nil {
+			p.handler.Print(rune(b))
+		}
+
+	case parser.ExecuteAction:
+		p.cmd = int(b)
+		if p.handler.Execute != nil {
+			p.handler.Execute(b)
+		}
+
+	case parser.PrefixAction:
+		// Collect private prefix
+		// we only store the last prefix
+		p.cmd &^= 0xff << parser.PrefixShift
+		p.cmd |= int(b) << parser.PrefixShift
+
+	case parser.CollectAction:
+		if state == parser.Utf8State {
+			// Reset the UTF-8 counter
+			p.paramsLen = 0
+			p.collectRune(b)
+		} else {
+			// Collect intermediate bytes
+			// we only store the last intermediate byte
+			p.cmd &^= 0xff << parser.IntermedShift
+			p.cmd |= int(b) << parser.IntermedShift
+		}
+
+	case parser.ParamAction:
+		// Collect parameters
+		if p.paramsLen >= len(p.params) {
+			break
+		}
+
+		if b >= '0' && b <= '9' {
+			if p.params[p.paramsLen] == parser.MissingParam {
+				p.params[p.paramsLen] = 0
+			}
+
+			p.params[p.paramsLen] *= 10
+			p.params[p.paramsLen] += int(b - '0')
+		}
+
+		if b == ':' {
+			p.params[p.paramsLen] |= parser.HasMoreFlag
+		}
+
+		if b == ';' || b == ':' {
+			p.paramsLen++
+			if p.paramsLen < len(p.params) {
+				p.params[p.paramsLen] = parser.MissingParam
+			}
+		}
+
+	case parser.StartAction:
+		if p.dataLen < 0 && p.data != nil {
+			p.data = p.data[:0]
+		} else {
+			p.dataLen = 0
+		}
+		if p.state >= parser.DcsEntryState && p.state <= parser.DcsStringState {
+			// Collect the command byte for DCS
+			p.cmd |= int(b)
+		} else {
+			p.cmd = parser.MissingCommand
+		}
+
+	case parser.PutAction:
+		switch p.state {
+		case parser.OscStringState:
+			if b == ';' && p.cmd == parser.MissingCommand {
+				p.parseStringCmd()
+			}
+		}
+
+		if p.dataLen < 0 {
+			p.data = append(p.data, b)
+		} else {
+			if p.dataLen < len(p.data) {
+				p.data[p.dataLen] = b
+				p.dataLen++
+			}
+		}
+
+	case parser.DispatchAction:
+		// Increment the last parameter
+		if p.paramsLen > 0 && p.paramsLen < len(p.params)-1 ||
+			p.paramsLen == 0 && len(p.params) > 0 && p.params[0] != parser.MissingParam {
+			p.paramsLen++
+		}
+
+		if p.state == parser.OscStringState && p.cmd == parser.MissingCommand {
+			// Ensure we have a command for OSC
+			p.parseStringCmd()
+		}
+
+		data := p.data
+		if p.dataLen >= 0 {
+			data = data[:p.dataLen]
+		}
+		switch p.state {
+		case parser.CsiEntryState, parser.CsiParamState, parser.CsiIntermediateState:
+			p.cmd |= int(b)
+			if p.handler.HandleCsi != nil {
+				p.handler.HandleCsi(Cmd(p.cmd), p.Params())
+			}
+		case parser.EscapeState, parser.EscapeIntermediateState:
+			p.cmd |= int(b)
+			if p.handler.HandleEsc != nil {
+				p.handler.HandleEsc(Cmd(p.cmd))
+			}
+		case parser.DcsEntryState, parser.DcsParamState, parser.DcsIntermediateState, parser.DcsStringState:
+			if p.handler.HandleDcs != nil {
+				p.handler.HandleDcs(Cmd(p.cmd), p.Params(), data)
+			}
+		case parser.OscStringState:
+			if p.handler.HandleOsc != nil {
+				p.handler.HandleOsc(p.cmd, data)
+			}
+		case parser.SosStringState:
+			if p.handler.HandleSos != nil {
+				p.handler.HandleSos(data)
+			}
+		case parser.PmStringState:
+			if p.handler.HandlePm != nil {
+				p.handler.HandlePm(data)
+			}
+		case parser.ApcStringState:
+			if p.handler.HandleApc != nil {
+				p.handler.HandleApc(data)
+			}
+		}
+	}
+}
+
+func utf8ByteLen(b byte) int {
+	if b <= 0b0111_1111 { // 0x00-0x7F
+		return 1
+	} else if b >= 0b1100_0000 && b <= 0b1101_1111 { // 0xC0-0xDF
+		return 2
+	} else if b >= 0b1110_0000 && b <= 0b1110_1111 { // 0xE0-0xEF
+		return 3
+	} else if b >= 0b1111_0000 && b <= 0b1111_0111 { // 0xF0-0xF7
+		return 4
+	}
+	return -1
+}

vendor/github.com/charmbracelet/x/ansi/parser/const.go

@@ -0,0 +1,79 @@
+// Package parser provides ANSI escape sequence parsing functionality.
+package parser
+
+// Action is a DEC ANSI parser action.
+type Action = byte
+
+// These are the actions that the parser can take.
+const (
+	NoneAction Action = iota
+	ClearAction
+	CollectAction
+	PrefixAction
+	DispatchAction
+	ExecuteAction
+	StartAction // Start of a data string
+	PutAction   // Put into the data string
+	ParamAction
+	PrintAction
+
+	IgnoreAction = NoneAction
+)
+
+// ActionNames provides string names for parser actions.
+var ActionNames = []string{
+	"NoneAction",
+	"ClearAction",
+	"CollectAction",
+	"PrefixAction",
+	"DispatchAction",
+	"ExecuteAction",
+	"StartAction",
+	"PutAction",
+	"ParamAction",
+	"PrintAction",
+}
+
+// State is a DEC ANSI parser state.
+type State = byte
+
+// These are the states that the parser can be in.
+const (
+	GroundState State = iota
+	CsiEntryState
+	CsiIntermediateState
+	CsiParamState
+	DcsEntryState
+	DcsIntermediateState
+	DcsParamState
+	DcsStringState
+	EscapeState
+	EscapeIntermediateState
+	OscStringState
+	SosStringState
+	PmStringState
+	ApcStringState
+
+	// Utf8State is not part of the DEC ANSI standard. It is used to handle
+	// UTF-8 sequences.
+	Utf8State
+)
+
+// StateNames provides string names for parser states.
+var StateNames = []string{
+	"GroundState",
+	"CsiEntryState",
+	"CsiIntermediateState",
+	"CsiParamState",
+	"DcsEntryState",
+	"DcsIntermediateState",
+	"DcsParamState",
+	"DcsStringState",
+	"EscapeState",
+	"EscapeIntermediateState",
+	"OscStringState",
+	"SosStringState",
+	"PmStringState",
+	"ApcStringState",
+	"Utf8State",
+}

vendor/github.com/charmbracelet/x/ansi/parser/seq.go

@@ -0,0 +1,136 @@
+package parser
+
+import "math"
+
+// Shift and masks for sequence parameters and intermediates.
+const (
+	PrefixShift    = 8
+	IntermedShift  = 16
+	FinalMask      = 0xff
+	HasMoreFlag    = math.MinInt32
+	ParamMask      = ^HasMoreFlag
+	MissingParam   = ParamMask
+	MissingCommand = MissingParam
+	MaxParam       = math.MaxUint16 // the maximum value a parameter can have
+)
+
+const (
+	// MaxParamsSize is the maximum number of parameters a sequence can have.
+	MaxParamsSize = 32
+
+	// DefaultParamValue is the default value used for missing parameters.
+	DefaultParamValue = 0
+)
+
+// Prefix returns the prefix byte of the sequence.
+// This is always gonna be one of the following '<' '=' '>' '?' and in the
+// range of 0x3C-0x3F.
+// Zero is returned if the sequence does not have a prefix.
+func Prefix(cmd int) int {
+	return (cmd >> PrefixShift) & FinalMask
+}
+
+// Intermediate returns the intermediate byte of the sequence.
+// An intermediate byte is in the range of 0x20-0x2F. This includes these
+// characters from ' ', '!', '"', '#', '$', '%', '&', ”', '(', ')', '*', '+',
+// ',', '-', '.', '/'.
+// Zero is returned if the sequence does not have an intermediate byte.
+func Intermediate(cmd int) int {
+	return (cmd >> IntermedShift) & FinalMask
+}
+
+// Command returns the command byte of the CSI sequence.
+func Command(cmd int) int {
+	return cmd & FinalMask
+}
+
+// Param returns the parameter at the given index.
+// It returns -1 if the parameter does not exist.
+func Param(params []int, i int) int {
+	if len(params) == 0 || i < 0 || i >= len(params) {
+		return -1
+	}
+
+	p := params[i] & ParamMask
+	if p == MissingParam {
+		return -1
+	}
+
+	return p
+}
+
+// HasMore returns true if the parameter has more sub-parameters.
+func HasMore(params []int, i int) bool {
+	if len(params) == 0 || i >= len(params) {
+		return false
+	}
+
+	return params[i]&HasMoreFlag != 0
+}
+
+// Subparams returns the sub-parameters of the given parameter.
+// It returns nil if the parameter does not exist.
+func Subparams(params []int, i int) []int {
+	if len(params) == 0 || i < 0 || i >= len(params) {
+		return nil
+	}
+
+	// Count the number of parameters before the given parameter index.
+	var count int
+	var j int
+	for j = range params {
+		if count == i {
+			break
+		}
+		if !HasMore(params, j) {
+			count++
+		}
+	}
+
+	if count > i || j >= len(params) {
+		return nil
+	}
+
+	var subs []int
+	for ; j < len(params); j++ {
+		if !HasMore(params, j) {
+			break
+		}
+		p := Param(params, j)
+		if p == -1 {
+			p = DefaultParamValue
+		}
+		subs = append(subs, p)
+	}
+
+	p := Param(params, j)
+	if p == -1 {
+		p = DefaultParamValue
+	}
+
+	return append(subs, p)
+}
+
+// Len returns the number of parameters in the sequence.
+// This will return the number of parameters in the sequence, excluding any
+// sub-parameters.
+func Len(params []int) int {
+	var n int
+	for i := range params {
+		if !HasMore(params, i) {
+			n++
+		}
+	}
+	return n
+}
+
+// Range iterates over the parameters of the sequence and calls the given
+// function for each parameter.
+// The function should return false to stop the iteration.
+func Range(params []int, fn func(i int, param int, hasMore bool) bool) {
+	for i := range params {
+		if !fn(i, Param(params, i), HasMore(params, i)) {
+			break
+		}
+	}
+}

vendor/github.com/charmbracelet/x/ansi/parser/transition_table.go

@@ -0,0 +1,273 @@
+package parser
+
+// Table values are generated like this:
+//
+//	index:  currentState << IndexStateShift | charCode
+//	value:  action << TransitionActionShift | nextState
+const (
+	TransitionActionShift = 4
+	TransitionStateMask   = 15
+	IndexStateShift       = 8
+
+	// DefaultTableSize is the default size of the transition table.
+	DefaultTableSize = 4096
+)
+
+// Table is a DEC ANSI transition table.
+var Table = GenerateTransitionTable()
+
+// TransitionTable is a DEC ANSI transition table.
+// https://vt100.net/emu/dec_ansi_parser
+type TransitionTable []byte
+
+// NewTransitionTable returns a new DEC ANSI transition table.
+func NewTransitionTable(size int) TransitionTable {
+	if size <= 0 {
+		size = DefaultTableSize
+	}
+	return TransitionTable(make([]byte, size))
+}
+
+// SetDefault sets default transition.
+func (t TransitionTable) SetDefault(action Action, state State) {
+	for i := range t {
+		t[i] = action<<TransitionActionShift | state
+	}
+}
+
+// AddOne adds a transition.
+func (t TransitionTable) AddOne(code byte, state State, action Action, next State) {
+	idx := int(state)<<IndexStateShift | int(code)
+	value := action<<TransitionActionShift | next
+	t[idx] = value
+}
+
+// AddMany adds many transitions.
+func (t TransitionTable) AddMany(codes []byte, state State, action Action, next State) {
+	for _, code := range codes {
+		t.AddOne(code, state, action, next)
+	}
+}
+
+// AddRange adds a range of transitions.
+func (t TransitionTable) AddRange(start, end byte, state State, action Action, next State) {
+	for i := int(start); i <= int(end); i++ {
+		t.AddOne(byte(i), state, action, next)
+	}
+}
+
+// Transition returns the next state and action for the given state and byte.
+func (t TransitionTable) Transition(state State, code byte) (State, Action) {
+	index := int(state)<<IndexStateShift | int(code)
+	value := t[index]
+	return value & TransitionStateMask, value >> TransitionActionShift
+}
+
+// byte range macro.
+func r(start, end byte) []byte {
+	var a []byte
+	for i := int(start); i <= int(end); i++ {
+		a = append(a, byte(i))
+	}
+	return a
+}
+
+// GenerateTransitionTable generates a DEC ANSI transition table compatible
+// with the VT500-series of terminals. This implementation includes a few
+// modifications that include:
+//   - A new Utf8State is introduced to handle UTF8 sequences.
+//   - Osc and Dcs data accept UTF8 sequences by extending the printable range
+//     to 0xFF and 0xFE respectively.
+//   - We don't ignore 0x3A (':') when building Csi and Dcs parameters and
+//     instead use it to denote sub-parameters.
+//   - Support dispatching SosPmApc sequences.
+//   - The DEL (0x7F) character is executed in the Ground state.
+//   - The DEL (0x7F) character is collected in the DcsPassthrough string state.
+//   - The ST C1 control character (0x9C) is executed and not ignored.
+func GenerateTransitionTable() TransitionTable {
+	table := NewTransitionTable(DefaultTableSize)
+	table.SetDefault(NoneAction, GroundState)
+
+	// Anywhere
+	for _, state := range r(GroundState, Utf8State) {
+		// Anywhere -> Ground
+		table.AddMany([]byte{0x18, 0x1a, 0x99, 0x9a}, state, ExecuteAction, GroundState)
+		table.AddRange(0x80, 0x8F, state, ExecuteAction, GroundState)
+		table.AddRange(0x90, 0x97, state, ExecuteAction, GroundState)
+		table.AddOne(0x9C, state, ExecuteAction, GroundState)
+		// Anywhere -> Escape
+		table.AddOne(0x1B, state, ClearAction, EscapeState)
+		// Anywhere -> SosStringState
+		table.AddOne(0x98, state, StartAction, SosStringState)
+		// Anywhere -> PmStringState
+		table.AddOne(0x9E, state, StartAction, PmStringState)
+		// Anywhere -> ApcStringState
+		table.AddOne(0x9F, state, StartAction, ApcStringState)
+		// Anywhere -> CsiEntry
+		table.AddOne(0x9B, state, ClearAction, CsiEntryState)
+		// Anywhere -> DcsEntry
+		table.AddOne(0x90, state, ClearAction, DcsEntryState)
+		// Anywhere -> OscString
+		table.AddOne(0x9D, state, StartAction, OscStringState)
+		// Anywhere -> Utf8
+		table.AddRange(0xC2, 0xDF, state, CollectAction, Utf8State) // UTF8 2 byte sequence
+		table.AddRange(0xE0, 0xEF, state, CollectAction, Utf8State) // UTF8 3 byte sequence
+		table.AddRange(0xF0, 0xF4, state, CollectAction, Utf8State) // UTF8 4 byte sequence
+	}
+
+	// Ground
+	table.AddRange(0x00, 0x17, GroundState, ExecuteAction, GroundState)
+	table.AddOne(0x19, GroundState, ExecuteAction, GroundState)
+	table.AddRange(0x1C, 0x1F, GroundState, ExecuteAction, GroundState)
+	table.AddRange(0x20, 0x7E, GroundState, PrintAction, GroundState)
+	table.AddOne(0x7F, GroundState, ExecuteAction, GroundState)
+
+	// EscapeIntermediate
+	table.AddRange(0x00, 0x17, EscapeIntermediateState, ExecuteAction, EscapeIntermediateState)
+	table.AddOne(0x19, EscapeIntermediateState, ExecuteAction, EscapeIntermediateState)
+	table.AddRange(0x1C, 0x1F, EscapeIntermediateState, ExecuteAction, EscapeIntermediateState)
+	table.AddRange(0x20, 0x2F, EscapeIntermediateState, CollectAction, EscapeIntermediateState)
+	table.AddOne(0x7F, EscapeIntermediateState, IgnoreAction, EscapeIntermediateState)
+	// EscapeIntermediate -> Ground
+	table.AddRange(0x30, 0x7E, EscapeIntermediateState, DispatchAction, GroundState)
+
+	// Escape
+	table.AddRange(0x00, 0x17, EscapeState, ExecuteAction, EscapeState)
+	table.AddOne(0x19, EscapeState, ExecuteAction, EscapeState)
+	table.AddRange(0x1C, 0x1F, EscapeState, ExecuteAction, EscapeState)
+	table.AddOne(0x7F, EscapeState, IgnoreAction, EscapeState)
+	// Escape -> Ground
+	table.AddRange(0x30, 0x4F, EscapeState, DispatchAction, GroundState)
+	table.AddRange(0x51, 0x57, EscapeState, DispatchAction, GroundState)
+	table.AddOne(0x59, EscapeState, DispatchAction, GroundState)
+	table.AddOne(0x5A, EscapeState, DispatchAction, GroundState)
+	table.AddOne(0x5C, EscapeState, DispatchAction, GroundState)
+	table.AddRange(0x60, 0x7E, EscapeState, DispatchAction, GroundState)
+	// Escape -> Escape_intermediate
+	table.AddRange(0x20, 0x2F, EscapeState, CollectAction, EscapeIntermediateState)
+	// Escape -> Sos_pm_apc_string
+	table.AddOne('X', EscapeState, StartAction, SosStringState) // SOS
+	table.AddOne('^', EscapeState, StartAction, PmStringState)  // PM
+	table.AddOne('_', EscapeState, StartAction, ApcStringState) // APC
+	// Escape -> Dcs_entry
+	table.AddOne('P', EscapeState, ClearAction, DcsEntryState)
+	// Escape -> Csi_entry
+	table.AddOne('[', EscapeState, ClearAction, CsiEntryState)
+	// Escape -> Osc_string
+	table.AddOne(']', EscapeState, StartAction, OscStringState)
+
+	// Sos_pm_apc_string
+	for _, state := range r(SosStringState, ApcStringState) {
+		table.AddRange(0x00, 0x17, state, PutAction, state)
+		table.AddOne(0x19, state, PutAction, state)
+		table.AddRange(0x1C, 0x1F, state, PutAction, state)
+		table.AddRange(0x20, 0x7F, state, PutAction, state)
+		// ESC, ST, CAN, and SUB terminate the sequence
+		table.AddOne(0x1B, state, DispatchAction, EscapeState)
+		table.AddOne(0x9C, state, DispatchAction, GroundState)
+		table.AddMany([]byte{0x18, 0x1A}, state, IgnoreAction, GroundState)
+	}
+
+	// Dcs_entry
+	table.AddRange(0x00, 0x07, DcsEntryState, IgnoreAction, DcsEntryState)
+	table.AddRange(0x0E, 0x17, DcsEntryState, IgnoreAction, DcsEntryState)
+	table.AddOne(0x19, DcsEntryState, IgnoreAction, DcsEntryState)
+	table.AddRange(0x1C, 0x1F, DcsEntryState, IgnoreAction, DcsEntryState)
+	table.AddOne(0x7F, DcsEntryState, IgnoreAction, DcsEntryState)
+	// Dcs_entry -> Dcs_intermediate
+	table.AddRange(0x20, 0x2F, DcsEntryState, CollectAction, DcsIntermediateState)
+	// Dcs_entry -> Dcs_param
+	table.AddRange(0x30, 0x3B, DcsEntryState, ParamAction, DcsParamState)
+	table.AddRange(0x3C, 0x3F, DcsEntryState, PrefixAction, DcsParamState)
+	// Dcs_entry -> Dcs_passthrough
+	table.AddRange(0x08, 0x0D, DcsEntryState, PutAction, DcsStringState) // Follows ECMA-48 § 8.3.27
+	// XXX: allows passing ESC (not a ECMA-48 standard) this to allow for
+	// passthrough of ANSI sequences like in Screen or Tmux passthrough mode.
+	table.AddOne(0x1B, DcsEntryState, PutAction, DcsStringState)
+	table.AddRange(0x40, 0x7E, DcsEntryState, StartAction, DcsStringState)
+
+	// Dcs_intermediate
+	table.AddRange(0x00, 0x17, DcsIntermediateState, IgnoreAction, DcsIntermediateState)
+	table.AddOne(0x19, DcsIntermediateState, IgnoreAction, DcsIntermediateState)
+	table.AddRange(0x1C, 0x1F, DcsIntermediateState, IgnoreAction, DcsIntermediateState)
+	table.AddRange(0x20, 0x2F, DcsIntermediateState, CollectAction, DcsIntermediateState)
+	table.AddOne(0x7F, DcsIntermediateState, IgnoreAction, DcsIntermediateState)
+	// Dcs_intermediate -> Dcs_passthrough
+	table.AddRange(0x30, 0x3F, DcsIntermediateState, StartAction, DcsStringState)
+	table.AddRange(0x40, 0x7E, DcsIntermediateState, StartAction, DcsStringState)
+
+	// Dcs_param
+	table.AddRange(0x00, 0x17, DcsParamState, IgnoreAction, DcsParamState)
+	table.AddOne(0x19, DcsParamState, IgnoreAction, DcsParamState)
+	table.AddRange(0x1C, 0x1F, DcsParamState, IgnoreAction, DcsParamState)
+	table.AddRange(0x30, 0x3B, DcsParamState, ParamAction, DcsParamState)
+	table.AddOne(0x7F, DcsParamState, IgnoreAction, DcsParamState)
+	table.AddRange(0x3C, 0x3F, DcsParamState, IgnoreAction, DcsParamState)
+	// Dcs_param -> Dcs_intermediate
+	table.AddRange(0x20, 0x2F, DcsParamState, CollectAction, DcsIntermediateState)
+	// Dcs_param -> Dcs_passthrough
+	table.AddRange(0x40, 0x7E, DcsParamState, StartAction, DcsStringState)
+
+	// Dcs_passthrough
+	table.AddRange(0x00, 0x17, DcsStringState, PutAction, DcsStringState)
+	table.AddOne(0x19, DcsStringState, PutAction, DcsStringState)
+	table.AddRange(0x1C, 0x1F, DcsStringState, PutAction, DcsStringState)
+	table.AddRange(0x20, 0x7E, DcsStringState, PutAction, DcsStringState)
+	table.AddOne(0x7F, DcsStringState, PutAction, DcsStringState)
+	table.AddRange(0x80, 0xFF, DcsStringState, PutAction, DcsStringState) // Allow Utf8 characters by extending the printable range from 0x7F to 0xFF
+	// ST, CAN, SUB, and ESC terminate the sequence
+	table.AddOne(0x1B, DcsStringState, DispatchAction, EscapeState)
+	table.AddOne(0x9C, DcsStringState, DispatchAction, GroundState)
+	table.AddMany([]byte{0x18, 0x1A}, DcsStringState, IgnoreAction, GroundState)
+
+	// Csi_param
+	table.AddRange(0x00, 0x17, CsiParamState, ExecuteAction, CsiParamState)
+	table.AddOne(0x19, CsiParamState, ExecuteAction, CsiParamState)
+	table.AddRange(0x1C, 0x1F, CsiParamState, ExecuteAction, CsiParamState)
+	table.AddRange(0x30, 0x3B, CsiParamState, ParamAction, CsiParamState)
+	table.AddOne(0x7F, CsiParamState, IgnoreAction, CsiParamState)
+	table.AddRange(0x3C, 0x3F, CsiParamState, IgnoreAction, CsiParamState)
+	// Csi_param -> Ground
+	table.AddRange(0x40, 0x7E, CsiParamState, DispatchAction, GroundState)
+	// Csi_param -> Csi_intermediate
+	table.AddRange(0x20, 0x2F, CsiParamState, CollectAction, CsiIntermediateState)
+
+	// Csi_intermediate
+	table.AddRange(0x00, 0x17, CsiIntermediateState, ExecuteAction, CsiIntermediateState)
+	table.AddOne(0x19, CsiIntermediateState, ExecuteAction, CsiIntermediateState)
+	table.AddRange(0x1C, 0x1F, CsiIntermediateState, ExecuteAction, CsiIntermediateState)
+	table.AddRange(0x20, 0x2F, CsiIntermediateState, CollectAction, CsiIntermediateState)
+	table.AddOne(0x7F, CsiIntermediateState, IgnoreAction, CsiIntermediateState)
+	// Csi_intermediate -> Ground
+	table.AddRange(0x40, 0x7E, CsiIntermediateState, DispatchAction, GroundState)
+	// Csi_intermediate -> Csi_ignore
+	table.AddRange(0x30, 0x3F, CsiIntermediateState, IgnoreAction, GroundState)
+
+	// Csi_entry
+	table.AddRange(0x00, 0x17, CsiEntryState, ExecuteAction, CsiEntryState)
+	table.AddOne(0x19, CsiEntryState, ExecuteAction, CsiEntryState)
+	table.AddRange(0x1C, 0x1F, CsiEntryState, ExecuteAction, CsiEntryState)
+	table.AddOne(0x7F, CsiEntryState, IgnoreAction, CsiEntryState)
+	// Csi_entry -> Ground
+	table.AddRange(0x40, 0x7E, CsiEntryState, DispatchAction, GroundState)
+	// Csi_entry -> Csi_intermediate
+	table.AddRange(0x20, 0x2F, CsiEntryState, CollectAction, CsiIntermediateState)
+	// Csi_entry -> Csi_param
+	table.AddRange(0x30, 0x3B, CsiEntryState, ParamAction, CsiParamState)
+	table.AddRange(0x3C, 0x3F, CsiEntryState, PrefixAction, CsiParamState)
+
+	// Osc_string
+	table.AddRange(0x00, 0x06, OscStringState, IgnoreAction, OscStringState)
+	table.AddRange(0x08, 0x17, OscStringState, IgnoreAction, OscStringState)
+	table.AddOne(0x19, OscStringState, IgnoreAction, OscStringState)
+	table.AddRange(0x1C, 0x1F, OscStringState, IgnoreAction, OscStringState)
+	table.AddRange(0x20, 0xFF, OscStringState, PutAction, OscStringState) // Allow Utf8 characters by extending the printable range from 0x7F to 0xFF
+
+	// ST, CAN, SUB, ESC, and BEL terminate the sequence
+	table.AddOne(0x1B, OscStringState, DispatchAction, EscapeState)
+	table.AddOne(0x07, OscStringState, DispatchAction, GroundState)
+	table.AddOne(0x9C, OscStringState, DispatchAction, GroundState)
+	table.AddMany([]byte{0x18, 0x1A}, OscStringState, IgnoreAction, GroundState)
+
+	return table
+}

vendor/github.com/charmbracelet/x/ansi/parser_decode.go

@@ -0,0 +1,524 @@
+package ansi
+
+import (
+	"unicode/utf8"
+
+	"github.com/charmbracelet/x/ansi/parser"
+	"github.com/mattn/go-runewidth"
+	"github.com/rivo/uniseg"
+)
+
+// State represents the state of the ANSI escape sequence parser used by
+// [DecodeSequence].
+type State = byte
+
+// ANSI escape sequence states used by [DecodeSequence].
+const (
+	NormalState State = iota
+	PrefixState
+	ParamsState
+	IntermedState
+	EscapeState
+	StringState
+)
+
+// DecodeSequence decodes the first ANSI escape sequence or a printable
+// grapheme from the given data. It returns the sequence slice, the number of
+// bytes read, the cell width for each sequence, and the new state.
+//
+// The cell width will always be 0 for control and escape sequences, 1 for
+// ASCII printable characters, and the number of cells other Unicode characters
+// occupy. It uses the uniseg package to calculate the width of Unicode
+// graphemes and characters. This means it will always do grapheme clustering
+// (mode 2027).
+//
+// Passing a non-nil [*Parser] as the last argument will allow the decoder to
+// collect sequence parameters, data, and commands. The parser cmd will have
+// the packed command value that contains intermediate and prefix characters.
+// In the case of a OSC sequence, the cmd will be the OSC command number. Use
+// [Cmd] and [Param] types to unpack command intermediates and prefixes as well
+// as parameters.
+//
+// Zero [Cmd] means the CSI, DCS, or ESC sequence is invalid. Moreover, checking the
+// validity of other data sequences, OSC, DCS, etc, will require checking for
+// the returned sequence terminator bytes such as ST (ESC \\) and BEL).
+//
+// We store the command byte in [Cmd] in the most significant byte, the
+// prefix byte in the next byte, and the intermediate byte in the least
+// significant byte. This is done to avoid using a struct to store the command
+// and its intermediates and prefixes. The command byte is always the least
+// significant byte i.e. [Cmd & 0xff]. Use the [Cmd] type to unpack the
+// command, intermediate, and prefix bytes. Note that we only collect the last
+// prefix character and intermediate byte.
+//
+// The [p.Params] slice will contain the parameters of the sequence. Any
+// sub-parameter will have the [parser.HasMoreFlag] set. Use the [Param] type
+// to unpack the parameters.
+//
+// Example:
+//
+//	var state byte // the initial state is always zero [NormalState]
+//	p := NewParser(32, 1024) // create a new parser with a 32 params buffer and 1024 data buffer (optional)
+//	input := []byte("\x1b[31mHello, World!\x1b[0m")
+//	for len(input) > 0 {
+//		seq, width, n, newState := DecodeSequence(input, state, p)
+//		log.Printf("seq: %q, width: %d", seq, width)
+//		state = newState
+//		input = input[n:]
+//	}
+//
+// This function treats the text as a sequence of grapheme clusters.
+func DecodeSequence[T string | []byte](b T, state byte, p *Parser) (seq T, width int, n int, newState byte) {
+	return decodeSequence(GraphemeWidth, b, state, p)
+}
+
+// DecodeSequenceWc decodes the first ANSI escape sequence or a printable
+// grapheme from the given data. It returns the sequence slice, the number of
+// bytes read, the cell width for each sequence, and the new state.
+//
+// The cell width will always be 0 for control and escape sequences, 1 for
+// ASCII printable characters, and the number of cells other Unicode characters
+// occupy. It uses the uniseg package to calculate the width of Unicode
+// graphemes and characters. This means it will always do grapheme clustering
+// (mode 2027).
+//
+// Passing a non-nil [*Parser] as the last argument will allow the decoder to
+// collect sequence parameters, data, and commands. The parser cmd will have
+// the packed command value that contains intermediate and prefix characters.
+// In the case of a OSC sequence, the cmd will be the OSC command number. Use
+// [Cmd] and [Param] types to unpack command intermediates and prefixes as well
+// as parameters.
+//
+// Zero [Cmd] means the CSI, DCS, or ESC sequence is invalid. Moreover, checking the
+// validity of other data sequences, OSC, DCS, etc, will require checking for
+// the returned sequence terminator bytes such as ST (ESC \\) and BEL).
+//
+// We store the command byte in [Cmd] in the most significant byte, the
+// prefix byte in the next byte, and the intermediate byte in the least
+// significant byte. This is done to avoid using a struct to store the command
+// and its intermediates and prefixes. The command byte is always the least
+// significant byte i.e. [Cmd & 0xff]. Use the [Cmd] type to unpack the
+// command, intermediate, and prefix bytes. Note that we only collect the last
+// prefix character and intermediate byte.
+//
+// The [p.Params] slice will contain the parameters of the sequence. Any
+// sub-parameter will have the [parser.HasMoreFlag] set. Use the [Param] type
+// to unpack the parameters.
+//
+// Example:
+//
+//	var state byte // the initial state is always zero [NormalState]
+//	p := NewParser(32, 1024) // create a new parser with a 32 params buffer and 1024 data buffer (optional)
+//	input := []byte("\x1b[31mHello, World!\x1b[0m")
+//	for len(input) > 0 {
+//		seq, width, n, newState := DecodeSequenceWc(input, state, p)
+//		log.Printf("seq: %q, width: %d", seq, width)
+//		state = newState
+//		input = input[n:]
+//	}
+//
+// This function treats the text as a sequence of wide characters and runes.
+func DecodeSequenceWc[T string | []byte](b T, state byte, p *Parser) (seq T, width int, n int, newState byte) {
+	return decodeSequence(WcWidth, b, state, p)
+}
+
+func decodeSequence[T string | []byte](m Method, b T, state State, p *Parser) (seq T, width int, n int, newState byte) {
+	for i := 0; i < len(b); i++ {
+		c := b[i]
+
+		switch state {
+		case NormalState:
+			switch c {
+			case ESC:
+				if p != nil {
+					if len(p.params) > 0 {
+						p.params[0] = parser.MissingParam
+					}
+					p.cmd = 0
+					p.paramsLen = 0
+					p.dataLen = 0
+				}
+				state = EscapeState
+				continue
+			case CSI, DCS:
+				if p != nil {
+					if len(p.params) > 0 {
+						p.params[0] = parser.MissingParam
+					}
+					p.cmd = 0
+					p.paramsLen = 0
+					p.dataLen = 0
+				}
+				state = PrefixState
+				continue
+			case OSC, APC, SOS, PM:
+				if p != nil {
+					p.cmd = parser.MissingCommand
+					p.dataLen = 0
+				}
+				state = StringState
+				continue
+			}
+
+			if p != nil {
+				p.dataLen = 0
+				p.paramsLen = 0
+				p.cmd = 0
+			}
+			if c > US && c < DEL {
+				// ASCII printable characters
+				return b[i : i+1], 1, 1, NormalState
+			}
+
+			if c <= US || c == DEL || c < 0xC0 {
+				// C0 & C1 control characters & DEL
+				return b[i : i+1], 0, 1, NormalState
+			}
+
+			if utf8.RuneStart(c) {
+				seq, _, width, _ = FirstGraphemeCluster(b, -1)
+				if m == WcWidth {
+					width = runewidth.StringWidth(string(seq))
+				}
+				i += len(seq)
+				return b[:i], width, i, NormalState
+			}
+
+			// Invalid UTF-8 sequence
+			return b[:i], 0, i, NormalState
+		case PrefixState:
+			if c >= '<' && c <= '?' {
+				if p != nil {
+					// We only collect the last prefix character.
+					p.cmd &^= 0xff << parser.PrefixShift
+					p.cmd |= int(c) << parser.PrefixShift
+				}
+				break
+			}
+
+			state = ParamsState
+			fallthrough
+		case ParamsState:
+			if c >= '0' && c <= '9' {
+				if p != nil {
+					if p.params[p.paramsLen] == parser.MissingParam {
+						p.params[p.paramsLen] = 0
+					}
+
+					p.params[p.paramsLen] *= 10
+					p.params[p.paramsLen] += int(c - '0')
+				}
+				break
+			}
+
+			if c == ':' {
+				if p != nil {
+					p.params[p.paramsLen] |= parser.HasMoreFlag
+				}
+			}
+
+			if c == ';' || c == ':' {
+				if p != nil {
+					p.paramsLen++
+					if p.paramsLen < len(p.params) {
+						p.params[p.paramsLen] = parser.MissingParam
+					}
+				}
+				break
+			}
+
+			state = IntermedState
+			fallthrough
+		case IntermedState:
+			if c >= ' ' && c <= '/' {
+				if p != nil {
+					p.cmd &^= 0xff << parser.IntermedShift
+					p.cmd |= int(c) << parser.IntermedShift
+				}
+				break
+			}
+
+			if p != nil {
+				// Increment the last parameter
+				if p.paramsLen > 0 && p.paramsLen < len(p.params)-1 ||
+					p.paramsLen == 0 && len(p.params) > 0 && p.params[0] != parser.MissingParam {
+					p.paramsLen++
+				}
+			}
+
+			if c >= '@' && c <= '~' {
+				if p != nil {
+					p.cmd &^= 0xff
+					p.cmd |= int(c)
+				}
+
+				if HasDcsPrefix(b) {
+					// Continue to collect DCS data
+					if p != nil {
+						p.dataLen = 0
+					}
+					state = StringState
+					continue
+				}
+
+				return b[:i+1], 0, i + 1, NormalState
+			}
+
+			// Invalid CSI/DCS sequence
+			return b[:i], 0, i, NormalState
+		case EscapeState:
+			switch c {
+			case '[', 'P':
+				if p != nil {
+					if len(p.params) > 0 {
+						p.params[0] = parser.MissingParam
+					}
+					p.paramsLen = 0
+					p.cmd = 0
+				}
+				state = PrefixState
+				continue
+			case ']', 'X', '^', '_':
+				if p != nil {
+					p.cmd = parser.MissingCommand
+					p.dataLen = 0
+				}
+				state = StringState
+				continue
+			}
+
+			if c >= ' ' && c <= '/' {
+				if p != nil {
+					p.cmd &^= 0xff << parser.IntermedShift
+					p.cmd |= int(c) << parser.IntermedShift
+				}
+				continue
+			} else if c >= '0' && c <= '~' {
+				if p != nil {
+					p.cmd &^= 0xff
+					p.cmd |= int(c)
+				}
+				return b[:i+1], 0, i + 1, NormalState
+			}
+
+			// Invalid escape sequence
+			return b[:i], 0, i, NormalState
+		case StringState:
+			switch c {
+			case BEL:
+				if HasOscPrefix(b) {
+					parseOscCmd(p)
+					return b[:i+1], 0, i + 1, NormalState
+				}
+			case CAN, SUB:
+				if HasOscPrefix(b) {
+					// Ensure we parse the OSC command number
+					parseOscCmd(p)
+				}
+
+				// Cancel the sequence
+				return b[:i], 0, i, NormalState
+			case ST:
+				if HasOscPrefix(b) {
+					// Ensure we parse the OSC command number
+					parseOscCmd(p)
+				}
+
+				return b[:i+1], 0, i + 1, NormalState
+			case ESC:
+				if HasStPrefix(b[i:]) {
+					if HasOscPrefix(b) {
+						// Ensure we parse the OSC command number
+						parseOscCmd(p)
+					}
+
+					// End of string 7-bit (ST)
+					return b[:i+2], 0, i + 2, NormalState
+				}
+
+				// Otherwise, cancel the sequence
+				return b[:i], 0, i, NormalState
+			}
+
+			if p != nil && p.dataLen < len(p.data) {
+				p.data[p.dataLen] = c
+				p.dataLen++
+
+				// Parse the OSC command number
+				if c == ';' && HasOscPrefix(b) {
+					parseOscCmd(p)
+				}
+			}
+		}
+	}
+
+	return b, 0, len(b), state
+}
+
+func parseOscCmd(p *Parser) {
+	if p == nil || p.cmd != parser.MissingCommand {
+		return
+	}
+	for j := range p.dataLen {
+		d := p.data[j]
+		if d < '0' || d > '9' {
+			break
+		}
+		if p.cmd == parser.MissingCommand {
+			p.cmd = 0
+		}
+		p.cmd *= 10
+		p.cmd += int(d - '0')
+	}
+}
+
+// Equal returns true if the given byte slices are equal.
+func Equal[T string | []byte](a, b T) bool {
+	return string(a) == string(b)
+}
+
+// HasPrefix returns true if the given byte slice has prefix.
+func HasPrefix[T string | []byte](b, prefix T) bool {
+	return len(b) >= len(prefix) && Equal(b[0:len(prefix)], prefix)
+}
+
+// HasSuffix returns true if the given byte slice has suffix.
+func HasSuffix[T string | []byte](b, suffix T) bool {
+	return len(b) >= len(suffix) && Equal(b[len(b)-len(suffix):], suffix)
+}
+
+// HasCsiPrefix returns true if the given byte slice has a CSI prefix.
+func HasCsiPrefix[T string | []byte](b T) bool {
+	return (len(b) > 0 && b[0] == CSI) ||
+		(len(b) > 1 && b[0] == ESC && b[1] == '[')
+}
+
+// HasOscPrefix returns true if the given byte slice has an OSC prefix.
+func HasOscPrefix[T string | []byte](b T) bool {
+	return (len(b) > 0 && b[0] == OSC) ||
+		(len(b) > 1 && b[0] == ESC && b[1] == ']')
+}
+
+// HasApcPrefix returns true if the given byte slice has an APC prefix.
+func HasApcPrefix[T string | []byte](b T) bool {
+	return (len(b) > 0 && b[0] == APC) ||
+		(len(b) > 1 && b[0] == ESC && b[1] == '_')
+}
+
+// HasDcsPrefix returns true if the given byte slice has a DCS prefix.
+func HasDcsPrefix[T string | []byte](b T) bool {
+	return (len(b) > 0 && b[0] == DCS) ||
+		(len(b) > 1 && b[0] == ESC && b[1] == 'P')
+}
+
+// HasSosPrefix returns true if the given byte slice has a SOS prefix.
+func HasSosPrefix[T string | []byte](b T) bool {
+	return (len(b) > 0 && b[0] == SOS) ||
+		(len(b) > 1 && b[0] == ESC && b[1] == 'X')
+}
+
+// HasPmPrefix returns true if the given byte slice has a PM prefix.
+func HasPmPrefix[T string | []byte](b T) bool {
+	return (len(b) > 0 && b[0] == PM) ||
+		(len(b) > 1 && b[0] == ESC && b[1] == '^')
+}
+
+// HasStPrefix returns true if the given byte slice has a ST prefix.
+func HasStPrefix[T string | []byte](b T) bool {
+	return (len(b) > 0 && b[0] == ST) ||
+		(len(b) > 1 && b[0] == ESC && b[1] == '\\')
+}
+
+// HasEscPrefix returns true if the given byte slice has an ESC prefix.
+func HasEscPrefix[T string | []byte](b T) bool {
+	return len(b) > 0 && b[0] == ESC
+}
+
+// FirstGraphemeCluster returns the first grapheme cluster in the given string or byte slice.
+// This is a syntactic sugar function that wraps
+// uniseg.FirstGraphemeClusterInString and uniseg.FirstGraphemeCluster.
+func FirstGraphemeCluster[T string | []byte](b T, state int) (T, T, int, int) {
+	switch b := any(b).(type) {
+	case string:
+		cluster, rest, width, newState := uniseg.FirstGraphemeClusterInString(b, state)
+		return T(cluster), T(rest), width, newState
+	case []byte:
+		cluster, rest, width, newState := uniseg.FirstGraphemeCluster(b, state)
+		return T(cluster), T(rest), width, newState
+	}
+	panic("unreachable")
+}
+
+// Cmd represents a sequence command. This is used to pack/unpack a sequence
+// command with its intermediate and prefix characters. Those are commonly
+// found in CSI and DCS sequences.
+type Cmd int
+
+// Prefix returns the unpacked prefix byte of the CSI sequence.
+// This is always gonna be one of the following '<' '=' '>' '?' and in the
+// range of 0x3C-0x3F.
+// Zero is returned if the sequence does not have a prefix.
+func (c Cmd) Prefix() byte {
+	return byte(parser.Prefix(int(c)))
+}
+
+// Intermediate returns the unpacked intermediate byte of the CSI sequence.
+// An intermediate byte is in the range of 0x20-0x2F. This includes these
+// characters from ' ', '!', '"', '#', '$', '%', '&', ”', '(', ')', '*', '+',
+// ',', '-', '.', '/'.
+// Zero is returned if the sequence does not have an intermediate byte.
+func (c Cmd) Intermediate() byte {
+	return byte(parser.Intermediate(int(c)))
+}
+
+// Final returns the unpacked command byte of the CSI sequence.
+func (c Cmd) Final() byte {
+	return byte(parser.Command(int(c)))
+}
+
+// Command packs a command with the given prefix, intermediate, and final. A
+// zero byte means the sequence does not have a prefix or intermediate.
+//
+// Prefixes are in the range of 0x3C-0x3F that is one of `<=>?`.
+//
+// Intermediates are in the range of 0x20-0x2F that is anything in
+// `!"#$%&'()*+,-./`.
+//
+// Final bytes are in the range of 0x40-0x7E that is anything in the range
+// `@A–Z[\]^_`a–z{|}~`.
+func Command(prefix, inter, final byte) (c int) {
+	c = int(final)
+	c |= int(prefix) << parser.PrefixShift
+	c |= int(inter) << parser.IntermedShift
+	return
+}
+
+// Param represents a sequence parameter. Sequence parameters with
+// sub-parameters are packed with the HasMoreFlag set. This is used to unpack
+// the parameters from a CSI and DCS sequences.
+type Param int
+
+// Param returns the unpacked parameter at the given index.
+// It returns the default value if the parameter is missing.
+func (s Param) Param(def int) int {
+	p := int(s) & parser.ParamMask
+	if p == parser.MissingParam {
+		return def
+	}
+	return p
+}
+
+// HasMore unpacks the HasMoreFlag from the parameter.
+func (s Param) HasMore() bool {
+	return s&parser.HasMoreFlag != 0
+}
+
+// Parameter packs an escape code parameter with the given parameter and
+// whether this parameter has following sub-parameters.
+func Parameter(p int, hasMore bool) (s int) {
+	s = p & parser.ParamMask
+	if hasMore {
+		s |= parser.HasMoreFlag
+	}
+	return
+}

vendor/github.com/charmbracelet/x/ansi/parser_handler.go

@@ -0,0 +1,60 @@
+package ansi
+
+import "unsafe"
+
+// Params represents a list of packed parameters.
+type Params []Param
+
+// Param returns the parameter at the given index and if it is part of a
+// sub-parameters. It falls back to the default value if the parameter is
+// missing. If the index is out of bounds, it returns the default value and
+// false.
+func (p Params) Param(i, def int) (int, bool, bool) {
+	if i < 0 || i >= len(p) {
+		return def, false, false
+	}
+	return p[i].Param(def), p[i].HasMore(), true
+}
+
+// ForEach iterates over the parameters and calls the given function for each
+// parameter. If a parameter is part of a sub-parameter, it will be called with
+// hasMore set to true.
+// Use def to set a default value for missing parameters.
+func (p Params) ForEach(def int, f func(i, param int, hasMore bool)) {
+	for i := range p {
+		f(i, p[i].Param(def), p[i].HasMore())
+	}
+}
+
+// ToParams converts a list of integers to a list of parameters.
+func ToParams(params []int) Params {
+	return unsafe.Slice((*Param)(unsafe.Pointer(&params[0])), len(params))
+}
+
+// Handler handles actions performed by the parser.
+// It is used to handle ANSI escape sequences, control characters, and runes.
+type Handler struct {
+	// Print is called when a printable rune is encountered.
+	Print func(r rune)
+	// Execute is called when a control character is encountered.
+	Execute func(b byte)
+	// HandleCsi is called when a CSI sequence is encountered.
+	HandleCsi func(cmd Cmd, params Params)
+	// HandleEsc is called when an ESC sequence is encountered.
+	HandleEsc func(cmd Cmd)
+	// HandleDcs is called when a DCS sequence is encountered.
+	HandleDcs func(cmd Cmd, params Params, data []byte)
+	// HandleOsc is called when an OSC sequence is encountered.
+	HandleOsc func(cmd int, data []byte)
+	// HandlePm is called when a PM sequence is encountered.
+	HandlePm func(data []byte)
+	// HandleApc is called when an APC sequence is encountered.
+	HandleApc func(data []byte)
+	// HandleSos is called when a SOS sequence is encountered.
+	HandleSos func(data []byte)
+}
+
+// SetHandler sets the handler for the parser.
+func (p *Parser) SetHandler(h Handler) {
+	p.handler = h
+}

vendor/github.com/charmbracelet/x/ansi/parser_sync.go

@@ -0,0 +1,29 @@
+package ansi
+
+import (
+	"sync"
+
+	"github.com/charmbracelet/x/ansi/parser"
+)
+
+var parserPool = sync.Pool{
+	New: func() any {
+		p := NewParser()
+		p.SetParamsSize(parser.MaxParamsSize)
+		p.SetDataSize(1024 * 1024 * 4) // 4MB of data buffer
+		return p
+	},
+}
+
+// GetParser returns a parser from a sync pool.
+func GetParser() *Parser {
+	return parserPool.Get().(*Parser)
+}
+
+// PutParser returns a parser to a sync pool. The parser is reset
+// automatically.
+func PutParser(p *Parser) {
+	p.Reset()
+	p.dataLen = 0
+	parserPool.Put(p)
+}

vendor/github.com/charmbracelet/x/ansi/passthrough.go

@@ -0,0 +1,60 @@
+package ansi
+
+import (
+	"bytes"
+)
+
+// ScreenPassthrough wraps the given ANSI sequence in a DCS passthrough
+// sequence to be sent to the outer terminal. This is used to send raw escape
+// sequences to the outer terminal when running inside GNU Screen.
+//
+//	DCS <data> ST
+//
+// Note: Screen limits the length of string sequences to 768 bytes (since 2014).
+// Use zero to indicate no limit, otherwise, this will chunk the returned
+// string into limit sized chunks.
+//
+// See: https://www.gnu.org/software/screen/manual/screen.html#String-Escapes
+// See: https://git.savannah.gnu.org/cgit/screen.git/tree/src/screen.h?id=c184c6ec27683ff1a860c45be5cf520d896fd2ef#n44
+func ScreenPassthrough(seq string, limit int) string {
+	var b bytes.Buffer
+	b.WriteString("\x1bP")
+	if limit > 0 {
+		for i := 0; i < len(seq); i += limit {
+			end := min(i+limit, len(seq))
+			b.WriteString(seq[i:end])
+			if end < len(seq) {
+				b.WriteString("\x1b\\\x1bP")
+			}
+		}
+	} else {
+		b.WriteString(seq)
+	}
+	b.WriteString("\x1b\\")
+	return b.String()
+}
+
+// TmuxPassthrough wraps the given ANSI sequence in a special DCS passthrough
+// sequence to be sent to the outer terminal. This is used to send raw escape
+// sequences to the outer terminal when running inside Tmux.
+//
+//	DCS tmux ; <escaped-data> ST
+//
+// Where <escaped-data> is the given sequence in which all occurrences of ESC
+// (0x1b) are doubled i.e. replaced with ESC ESC (0x1b 0x1b).
+//
+// Note: this needs the `allow-passthrough` option to be set to `on`.
+//
+// See: https://github.com/tmux/tmux/wiki/FAQ#what-is-the-passthrough-escape-sequence-and-how-do-i-use-it
+func TmuxPassthrough(seq string) string {
+	var b bytes.Buffer
+	b.WriteString("\x1bPtmux;")
+	for i := range len(seq) {
+		if seq[i] == ESC {
+			b.WriteByte(ESC)
+		}
+		b.WriteByte(seq[i])
+	}
+	b.WriteString("\x1b\\")
+	return b.String()
+}

vendor/github.com/charmbracelet/x/ansi/paste.go

@@ -0,0 +1,7 @@
+package ansi
+
+// BracketedPasteStart is the control sequence to enable bracketed paste mode.
+const BracketedPasteStart = "\x1b[200~"
+
+// BracketedPasteEnd is the control sequence to disable bracketed paste mode.
+const BracketedPasteEnd = "\x1b[201~"

vendor/github.com/charmbracelet/x/ansi/reset.go

@@ -0,0 +1,11 @@
+package ansi
+
+// ResetInitialState (RIS) resets the terminal to its initial state.
+//
+//	ESC c
+//
+// See: https://vt100.net/docs/vt510-rm/RIS.html
+const (
+	ResetInitialState = "\x1bc"
+	RIS               = ResetInitialState
+)

vendor/github.com/charmbracelet/x/ansi/screen.go

@@ -0,0 +1,410 @@
+package ansi
+
+import (
+	"strconv"
+	"strings"
+)
+
+// EraseDisplay (ED) clears the display or parts of the display. A screen is
+// the shown part of the terminal display excluding the scrollback buffer.
+// Possible values:
+//
+// Default is 0.
+//
+//	 0: Clear from cursor to end of screen.
+//	 1: Clear from cursor to beginning of the screen.
+//	 2: Clear entire screen (and moves cursor to upper left on DOS).
+//	 3: Clear entire display which delete all lines saved in the scrollback buffer (xterm).
+//
+//	CSI <n> J
+//
+// See: https://vt100.net/docs/vt510-rm/ED.html
+func EraseDisplay(n int) string {
+	var s string
+	if n > 0 {
+		s = strconv.Itoa(n)
+	}
+	return "\x1b[" + s + "J"
+}
+
+// ED is an alias for [EraseDisplay].
+func ED(n int) string {
+	return EraseDisplay(n)
+}
+
+// EraseDisplay constants.
+// These are the possible values for the EraseDisplay function.
+const (
+	EraseScreenBelow   = "\x1b[J"
+	EraseScreenAbove   = "\x1b[1J"
+	EraseEntireScreen  = "\x1b[2J"
+	EraseEntireDisplay = "\x1b[3J"
+)
+
+// EraseLine (EL) clears the current line or parts of the line. Possible values:
+//
+//	0: Clear from cursor to end of line.
+//	1: Clear from cursor to beginning of the line.
+//	2: Clear entire line.
+//
+// The cursor position is not affected.
+//
+//	CSI <n> K
+//
+// See: https://vt100.net/docs/vt510-rm/EL.html
+func EraseLine(n int) string {
+	var s string
+	if n > 0 {
+		s = strconv.Itoa(n)
+	}
+	return "\x1b[" + s + "K"
+}
+
+// EL is an alias for [EraseLine].
+func EL(n int) string {
+	return EraseLine(n)
+}
+
+// EraseLine constants.
+// These are the possible values for the EraseLine function.
+const (
+	EraseLineRight  = "\x1b[K"
+	EraseLineLeft   = "\x1b[1K"
+	EraseEntireLine = "\x1b[2K"
+)
+
+// ScrollUp (SU) scrolls the screen up n lines. New lines are added at the
+// bottom of the screen.
+//
+//	CSI Pn S
+//
+// See: https://vt100.net/docs/vt510-rm/SU.html
+func ScrollUp(n int) string {
+	var s string
+	if n > 1 {
+		s = strconv.Itoa(n)
+	}
+	return "\x1b[" + s + "S"
+}
+
+// PanDown is an alias for [ScrollUp].
+func PanDown(n int) string {
+	return ScrollUp(n)
+}
+
+// SU is an alias for [ScrollUp].
+func SU(n int) string {
+	return ScrollUp(n)
+}
+
+// ScrollDown (SD) scrolls the screen down n lines. New lines are added at the
+// top of the screen.
+//
+//	CSI Pn T
+//
+// See: https://vt100.net/docs/vt510-rm/SD.html
+func ScrollDown(n int) string {
+	var s string
+	if n > 1 {
+		s = strconv.Itoa(n)
+	}
+	return "\x1b[" + s + "T"
+}
+
+// PanUp is an alias for [ScrollDown].
+func PanUp(n int) string {
+	return ScrollDown(n)
+}
+
+// SD is an alias for [ScrollDown].
+func SD(n int) string {
+	return ScrollDown(n)
+}
+
+// InsertLine (IL) inserts n blank lines at the current cursor position.
+// Existing lines are moved down.
+//
+//	CSI Pn L
+//
+// See: https://vt100.net/docs/vt510-rm/IL.html
+func InsertLine(n int) string {
+	var s string
+	if n > 1 {
+		s = strconv.Itoa(n)
+	}
+	return "\x1b[" + s + "L"
+}
+
+// IL is an alias for [InsertLine].
+func IL(n int) string {
+	return InsertLine(n)
+}
+
+// DeleteLine (DL) deletes n lines at the current cursor position. Existing
+// lines are moved up.
+//
+//	CSI Pn M
+//
+// See: https://vt100.net/docs/vt510-rm/DL.html
+func DeleteLine(n int) string {
+	var s string
+	if n > 1 {
+		s = strconv.Itoa(n)
+	}
+	return "\x1b[" + s + "M"
+}
+
+// DL is an alias for [DeleteLine].
+func DL(n int) string {
+	return DeleteLine(n)
+}
+
+// SetTopBottomMargins (DECSTBM) sets the top and bottom margins for the scrolling
+// region. The default is the entire screen.
+//
+// Default is 1 and the bottom of the screen.
+//
+//	CSI Pt ; Pb r
+//
+// See: https://vt100.net/docs/vt510-rm/DECSTBM.html
+func SetTopBottomMargins(top, bot int) string {
+	var t, b string
+	if top > 0 {
+		t = strconv.Itoa(top)
+	}
+	if bot > 0 {
+		b = strconv.Itoa(bot)
+	}
+	return "\x1b[" + t + ";" + b + "r"
+}
+
+// DECSTBM is an alias for [SetTopBottomMargins].
+func DECSTBM(top, bot int) string {
+	return SetTopBottomMargins(top, bot)
+}
+
+// SetLeftRightMargins (DECSLRM) sets the left and right margins for the scrolling
+// region.
+//
+// Default is 1 and the right of the screen.
+//
+//	CSI Pl ; Pr s
+//
+// See: https://vt100.net/docs/vt510-rm/DECSLRM.html
+func SetLeftRightMargins(left, right int) string {
+	var l, r string
+	if left > 0 {
+		l = strconv.Itoa(left)
+	}
+	if right > 0 {
+		r = strconv.Itoa(right)
+	}
+	return "\x1b[" + l + ";" + r + "s"
+}
+
+// DECSLRM is an alias for [SetLeftRightMargins].
+func DECSLRM(left, right int) string {
+	return SetLeftRightMargins(left, right)
+}
+
+// SetScrollingRegion (DECSTBM) sets the top and bottom margins for the scrolling
+// region. The default is the entire screen.
+//
+//	CSI <top> ; <bottom> r
+//
+// See: https://vt100.net/docs/vt510-rm/DECSTBM.html
+//
+// Deprecated: use [SetTopBottomMargins] instead.
+func SetScrollingRegion(t, b int) string {
+	if t < 0 {
+		t = 0
+	}
+	if b < 0 {
+		b = 0
+	}
+	return "\x1b[" + strconv.Itoa(t) + ";" + strconv.Itoa(b) + "r"
+}
+
+// InsertCharacter (ICH) inserts n blank characters at the current cursor
+// position. Existing characters move to the right. Characters moved past the
+// right margin are lost. ICH has no effect outside the scrolling margins.
+//
+// Default is 1.
+//
+//	CSI Pn @
+//
+// See: https://vt100.net/docs/vt510-rm/ICH.html
+func InsertCharacter(n int) string {
+	var s string
+	if n > 1 {
+		s = strconv.Itoa(n)
+	}
+	return "\x1b[" + s + "@"
+}
+
+// ICH is an alias for [InsertCharacter].
+func ICH(n int) string {
+	return InsertCharacter(n)
+}
+
+// DeleteCharacter (DCH) deletes n characters at the current cursor position.
+// As the characters are deleted, the remaining characters move to the left and
+// the cursor remains at the same position.
+//
+// Default is 1.
+//
+//	CSI Pn P
+//
+// See: https://vt100.net/docs/vt510-rm/DCH.html
+func DeleteCharacter(n int) string {
+	var s string
+	if n > 1 {
+		s = strconv.Itoa(n)
+	}
+	return "\x1b[" + s + "P"
+}
+
+// DCH is an alias for [DeleteCharacter].
+func DCH(n int) string {
+	return DeleteCharacter(n)
+}
+
+// SetTabEvery8Columns (DECST8C) sets the tab stops at every 8 columns.
+//
+//	CSI ? 5 W
+//
+// See: https://vt100.net/docs/vt510-rm/DECST8C.html
+const (
+	SetTabEvery8Columns = "\x1b[?5W"
+	DECST8C             = SetTabEvery8Columns
+)
+
+// HorizontalTabSet (HTS) sets a horizontal tab stop at the current cursor
+// column.
+//
+// This is equivalent to [HTS].
+//
+//	ESC H
+//
+// See: https://vt100.net/docs/vt510-rm/HTS.html
+const HorizontalTabSet = "\x1bH"
+
+// TabClear (TBC) clears tab stops.
+//
+// Default is 0.
+//
+// Possible values:
+// 0: Clear tab stop at the current column. (default)
+// 3: Clear all tab stops.
+//
+//	CSI Pn g
+//
+// See: https://vt100.net/docs/vt510-rm/TBC.html
+func TabClear(n int) string {
+	var s string
+	if n > 0 {
+		s = strconv.Itoa(n)
+	}
+	return "\x1b[" + s + "g"
+}
+
+// TBC is an alias for [TabClear].
+func TBC(n int) string {
+	return TabClear(n)
+}
+
+// RequestPresentationStateReport (DECRQPSR) requests the terminal to send a
+// report of the presentation state. This includes the cursor information [DECCIR],
+// and tab stop [DECTABSR] reports.
+//
+// Default is 0.
+//
+// Possible values:
+// 0: Error, request ignored.
+// 1: Cursor information report [DECCIR].
+// 2: Tab stop report [DECTABSR].
+//
+//	CSI Ps $ w
+//
+// See: https://vt100.net/docs/vt510-rm/DECRQPSR.html
+func RequestPresentationStateReport(n int) string {
+	var s string
+	if n > 0 {
+		s = strconv.Itoa(n)
+	}
+	return "\x1b[" + s + "$w"
+}
+
+// DECRQPSR is an alias for [RequestPresentationStateReport].
+func DECRQPSR(n int) string {
+	return RequestPresentationStateReport(n)
+}
+
+// TabStopReport (DECTABSR) is the response to a tab stop report request.
+// It reports the tab stops set in the terminal.
+//
+// The response is a list of tab stops separated by a slash (/) character.
+//
+//	DCS 2 $ u D ... D ST
+//
+// Where D is a decimal number representing a tab stop.
+//
+// See: https://vt100.net/docs/vt510-rm/DECTABSR.html
+func TabStopReport(stops ...int) string {
+	var s []string //nolint:prealloc
+	for _, v := range stops {
+		s = append(s, strconv.Itoa(v))
+	}
+	return "\x1bP2$u" + strings.Join(s, "/") + "\x1b\\"
+}
+
+// DECTABSR is an alias for [TabStopReport].
+func DECTABSR(stops ...int) string {
+	return TabStopReport(stops...)
+}
+
+// CursorInformationReport (DECCIR) is the response to a cursor information
+// report request. It reports the cursor position, visual attributes, and
+// character protection attributes. It also reports the status of origin mode
+// [DECOM] and the current active character set.
+//
+// The response is a list of values separated by a semicolon (;) character.
+//
+//	DCS 1 $ u D ... D ST
+//
+// Where D is a decimal number representing a value.
+//
+// See: https://vt100.net/docs/vt510-rm/DECCIR.html
+func CursorInformationReport(values ...int) string {
+	var s []string //nolint:prealloc
+	for _, v := range values {
+		s = append(s, strconv.Itoa(v))
+	}
+	return "\x1bP1$u" + strings.Join(s, ";") + "\x1b\\"
+}
+
+// DECCIR is an alias for [CursorInformationReport].
+func DECCIR(values ...int) string {
+	return CursorInformationReport(values...)
+}
+
+// RepeatPreviousCharacter (REP) repeats the previous character n times.
+// This is identical to typing the same character n times.
+//
+// Default is 1.
+//
+//	CSI Pn b
+//
+// See: ECMA-48 § 8.3.103.
+func RepeatPreviousCharacter(n int) string {
+	var s string
+	if n > 1 {
+		s = strconv.Itoa(n)
+	}
+	return "\x1b[" + s + "b"
+}
+
+// REP is an alias for [RepeatPreviousCharacter].
+func REP(n int) string {
+	return RepeatPreviousCharacter(n)
+}

vendor/github.com/charmbracelet/x/ansi/sgr.go

@@ -0,0 +1,79 @@
+package ansi
+
+// SelectGraphicRendition (SGR) is a command that sets display attributes.
+//
+// Default is 0.
+//
+//	CSI Ps ; Ps ... m
+//
+// See: https://vt100.net/docs/vt510-rm/SGR.html
+func SelectGraphicRendition(ps ...Attr) string {
+	if len(ps) == 0 {
+		return ResetStyle
+	}
+
+	return NewStyle(ps...).String()
+}
+
+// SGR is an alias for [SelectGraphicRendition].
+func SGR(ps ...Attr) string {
+	return SelectGraphicRendition(ps...)
+}
+
+var attrStrings = map[int]string{
+	ResetAttr:                        resetAttr,
+	BoldAttr:                         boldAttr,
+	FaintAttr:                        faintAttr,
+	ItalicAttr:                       italicAttr,
+	UnderlineAttr:                    underlineAttr,
+	SlowBlinkAttr:                    slowBlinkAttr,
+	RapidBlinkAttr:                   rapidBlinkAttr,
+	ReverseAttr:                      reverseAttr,
+	ConcealAttr:                      concealAttr,
+	StrikethroughAttr:                strikethroughAttr,
+	NormalIntensityAttr:              normalIntensityAttr,
+	NoItalicAttr:                     noItalicAttr,
+	NoUnderlineAttr:                  noUnderlineAttr,
+	NoBlinkAttr:                      noBlinkAttr,
+	NoReverseAttr:                    noReverseAttr,
+	NoConcealAttr:                    noConcealAttr,
+	NoStrikethroughAttr:              noStrikethroughAttr,
+	BlackForegroundColorAttr:         blackForegroundColorAttr,
+	RedForegroundColorAttr:           redForegroundColorAttr,
+	GreenForegroundColorAttr:         greenForegroundColorAttr,
+	YellowForegroundColorAttr:        yellowForegroundColorAttr,
+	BlueForegroundColorAttr:          blueForegroundColorAttr,
+	MagentaForegroundColorAttr:       magentaForegroundColorAttr,
+	CyanForegroundColorAttr:          cyanForegroundColorAttr,
+	WhiteForegroundColorAttr:         whiteForegroundColorAttr,
+	ExtendedForegroundColorAttr:      extendedForegroundColorAttr,
+	DefaultForegroundColorAttr:       defaultForegroundColorAttr,
+	BlackBackgroundColorAttr:         blackBackgroundColorAttr,
+	RedBackgroundColorAttr:           redBackgroundColorAttr,
+	GreenBackgroundColorAttr:         greenBackgroundColorAttr,
+	YellowBackgroundColorAttr:        yellowBackgroundColorAttr,
+	BlueBackgroundColorAttr:          blueBackgroundColorAttr,
+	MagentaBackgroundColorAttr:       magentaBackgroundColorAttr,
+	CyanBackgroundColorAttr:          cyanBackgroundColorAttr,
+	WhiteBackgroundColorAttr:         whiteBackgroundColorAttr,
+	ExtendedBackgroundColorAttr:      extendedBackgroundColorAttr,
+	DefaultBackgroundColorAttr:       defaultBackgroundColorAttr,
+	ExtendedUnderlineColorAttr:       extendedUnderlineColorAttr,
+	DefaultUnderlineColorAttr:        defaultUnderlineColorAttr,
+	BrightBlackForegroundColorAttr:   brightBlackForegroundColorAttr,
+	BrightRedForegroundColorAttr:     brightRedForegroundColorAttr,
+	BrightGreenForegroundColorAttr:   brightGreenForegroundColorAttr,
+	BrightYellowForegroundColorAttr:  brightYellowForegroundColorAttr,
+	BrightBlueForegroundColorAttr:    brightBlueForegroundColorAttr,
+	BrightMagentaForegroundColorAttr: brightMagentaForegroundColorAttr,
+	BrightCyanForegroundColorAttr:    brightCyanForegroundColorAttr,
+	BrightWhiteForegroundColorAttr:   brightWhiteForegroundColorAttr,
+	BrightBlackBackgroundColorAttr:   brightBlackBackgroundColorAttr,
+	BrightRedBackgroundColorAttr:     brightRedBackgroundColorAttr,
+	BrightGreenBackgroundColorAttr:   brightGreenBackgroundColorAttr,
+	BrightYellowBackgroundColorAttr:  brightYellowBackgroundColorAttr,
+	BrightBlueBackgroundColorAttr:    brightBlueBackgroundColorAttr,
+	BrightMagentaBackgroundColorAttr: brightMagentaBackgroundColorAttr,
+	BrightCyanBackgroundColorAttr:    brightCyanBackgroundColorAttr,
+	BrightWhiteBackgroundColorAttr:   brightWhiteBackgroundColorAttr,
+}

vendor/github.com/charmbracelet/x/ansi/status.go

@@ -0,0 +1,168 @@
+package ansi
+
+import (
+	"strconv"
+	"strings"
+)
+
+// StatusReport represents a terminal status report.
+type StatusReport interface {
+	// StatusReport returns the status report identifier.
+	StatusReport() int
+}
+
+// ANSIStatusReport represents an ANSI terminal status report.
+type ANSIStatusReport int //nolint:revive
+
+// StatusReport returns the status report identifier.
+func (s ANSIStatusReport) StatusReport() int {
+	return int(s)
+}
+
+// DECStatusReport represents a DEC terminal status report.
+type DECStatusReport int
+
+// StatusReport returns the status report identifier.
+func (s DECStatusReport) StatusReport() int {
+	return int(s)
+}
+
+// DeviceStatusReport (DSR) is a control sequence that reports the terminal's
+// status.
+// The terminal responds with a DSR sequence.
+//
+//	CSI Ps n
+//	CSI ? Ps n
+//
+// If one of the statuses is a [DECStatus], the sequence will use the DEC
+// format.
+//
+// See also https://vt100.net/docs/vt510-rm/DSR.html
+func DeviceStatusReport(statues ...StatusReport) string {
+	var dec bool
+	list := make([]string, len(statues))
+	seq := "\x1b["
+	for i, status := range statues {
+		list[i] = strconv.Itoa(status.StatusReport())
+		switch status.(type) {
+		case DECStatusReport:
+			dec = true
+		}
+	}
+	if dec {
+		seq += "?"
+	}
+	return seq + strings.Join(list, ";") + "n"
+}
+
+// DSR is an alias for [DeviceStatusReport].
+func DSR(status StatusReport) string {
+	return DeviceStatusReport(status)
+}
+
+// RequestCursorPositionReport is an escape sequence that requests the current
+// cursor position.
+//
+//	CSI 6 n
+//
+// The terminal will report the cursor position as a CSI sequence in the
+// following format:
+//
+//	CSI Pl ; Pc R
+//
+// Where Pl is the line number and Pc is the column number.
+// See: https://vt100.net/docs/vt510-rm/CPR.html
+const RequestCursorPositionReport = "\x1b[6n"
+
+// RequestExtendedCursorPositionReport (DECXCPR) is a sequence for requesting
+// the cursor position report including the current page number.
+//
+//	CSI ? 6 n
+//
+// The terminal will report the cursor position as a CSI sequence in the
+// following format:
+//
+//	CSI ? Pl ; Pc ; Pp R
+//
+// Where Pl is the line number, Pc is the column number, and Pp is the page
+// number.
+// See: https://vt100.net/docs/vt510-rm/DECXCPR.html
+const RequestExtendedCursorPositionReport = "\x1b[?6n"
+
+// RequestLightDarkReport is a control sequence that requests the terminal to
+// report its operating system light/dark color preference. Supported terminals
+// should respond with a [LightDarkReport] sequence as follows:
+//
+//	CSI ? 997 ; 1 n   for dark mode
+//	CSI ? 997 ; 2 n   for light mode
+//
+// See: https://contour-terminal.org/vt-extensions/color-palette-update-notifications/
+const RequestLightDarkReport = "\x1b[?996n"
+
+// CursorPositionReport (CPR) is a control sequence that reports the cursor's
+// position.
+//
+//	CSI Pl ; Pc R
+//
+// Where Pl is the line number and Pc is the column number.
+//
+// See also https://vt100.net/docs/vt510-rm/CPR.html
+func CursorPositionReport(line, column int) string {
+	if line < 1 {
+		line = 1
+	}
+	if column < 1 {
+		column = 1
+	}
+	return "\x1b[" + strconv.Itoa(line) + ";" + strconv.Itoa(column) + "R"
+}
+
+// CPR is an alias for [CursorPositionReport].
+func CPR(line, column int) string {
+	return CursorPositionReport(line, column)
+}
+
+// ExtendedCursorPositionReport (DECXCPR) is a control sequence that reports the
+// cursor's position along with the page number (optional).
+//
+//	CSI ? Pl ; Pc R
+//	CSI ? Pl ; Pc ; Pv R
+//
+// Where Pl is the line number, Pc is the column number, and Pv is the page
+// number.
+//
+// If the page number is zero or negative, the returned sequence won't include
+// the page number.
+//
+// See also https://vt100.net/docs/vt510-rm/DECXCPR.html
+func ExtendedCursorPositionReport(line, column, page int) string {
+	if line < 1 {
+		line = 1
+	}
+	if column < 1 {
+		column = 1
+	}
+	if page < 1 {
+		return "\x1b[?" + strconv.Itoa(line) + ";" + strconv.Itoa(column) + "R"
+	}
+	return "\x1b[?" + strconv.Itoa(line) + ";" + strconv.Itoa(column) + ";" + strconv.Itoa(page) + "R"
+}
+
+// DECXCPR is an alias for [ExtendedCursorPositionReport].
+func DECXCPR(line, column, page int) string {
+	return ExtendedCursorPositionReport(line, column, page)
+}
+
+// LightDarkReport is a control sequence that reports the terminal's operating
+// system light/dark color preference.
+//
+//	CSI ? 997 ; 1 n   for dark mode
+//	CSI ? 997 ; 2 n   for light mode
+//
+// See: https://contour-terminal.org/vt-extensions/color-palette-update-notifications/
+func LightDarkReport(dark bool) string {
+	if dark {
+		return "\x1b[?997;1n"
+	}
+	return "\x1b[?997;2n"
+}

vendor/github.com/charmbracelet/x/ansi/style.go

@@ -0,0 +1,673 @@
+package ansi
+
+import (
+	"image/color"
+	"strconv"
+	"strings"
+)
+
+// ResetStyle is a SGR (Select Graphic Rendition) style sequence that resets
+// all attributes.
+// See: https://en.wikipedia.org/wiki/ANSI_escape_code#SGR_(Select_Graphic_Rendition)_parameters
+const ResetStyle = "\x1b[m"
+
+// Attr is a SGR (Select Graphic Rendition) style attribute.
+type Attr = int
+
+// Style represents an ANSI SGR (Select Graphic Rendition) style.
+type Style []string
+
+// NewStyle returns a new style with the given attributes.
+func NewStyle(attrs ...Attr) Style {
+	if len(attrs) == 0 {
+		return Style{}
+	}
+	s := make(Style, 0, len(attrs))
+	for _, a := range attrs {
+		attr, ok := attrStrings[a]
+		if ok {
+			s = append(s, attr)
+		} else {
+			if a < 0 {
+				a = 0
+			}
+			s = append(s, strconv.Itoa(a))
+		}
+	}
+	return s
+}
+
+// String returns the ANSI SGR (Select Graphic Rendition) style sequence for
+// the given style.
+func (s Style) String() string {
+	if len(s) == 0 {
+		return ResetStyle
+	}
+	return "\x1b[" + strings.Join(s, ";") + "m"
+}
+
+// Styled returns a styled string with the given style applied.
+func (s Style) Styled(str string) string {
+	if len(s) == 0 {
+		return str
+	}
+	return s.String() + str + ResetStyle
+}
+
+// Reset appends the reset style attribute to the style.
+func (s Style) Reset() Style {
+	return append(s, resetAttr)
+}
+
+// Bold appends the bold style attribute to the style.
+func (s Style) Bold() Style {
+	return append(s, boldAttr)
+}
+
+// Faint appends the faint style attribute to the style.
+func (s Style) Faint() Style {
+	return append(s, faintAttr)
+}
+
+// Italic appends the italic style attribute to the style.
+func (s Style) Italic() Style {
+	return append(s, italicAttr)
+}
+
+// Underline appends the underline style attribute to the style.
+func (s Style) Underline() Style {
+	return append(s, underlineAttr)
+}
+
+// UnderlineStyle appends the underline style attribute to the style.
+func (s Style) UnderlineStyle(u UnderlineStyle) Style {
+	switch u {
+	case NoUnderlineStyle:
+		return s.NoUnderline()
+	case SingleUnderlineStyle:
+		return s.Underline()
+	case DoubleUnderlineStyle:
+		return append(s, doubleUnderlineStyle)
+	case CurlyUnderlineStyle:
+		return append(s, curlyUnderlineStyle)
+	case DottedUnderlineStyle:
+		return append(s, dottedUnderlineStyle)
+	case DashedUnderlineStyle:
+		return append(s, dashedUnderlineStyle)
+	}
+	return s
+}
+
+// DoubleUnderline appends the double underline style attribute to the style.
+// This is a convenience method for UnderlineStyle(DoubleUnderlineStyle).
+func (s Style) DoubleUnderline() Style {
+	return s.UnderlineStyle(DoubleUnderlineStyle)
+}
+
+// CurlyUnderline appends the curly underline style attribute to the style.
+// This is a convenience method for UnderlineStyle(CurlyUnderlineStyle).
+func (s Style) CurlyUnderline() Style {
+	return s.UnderlineStyle(CurlyUnderlineStyle)
+}
+
+// DottedUnderline appends the dotted underline style attribute to the style.
+// This is a convenience method for UnderlineStyle(DottedUnderlineStyle).
+func (s Style) DottedUnderline() Style {
+	return s.UnderlineStyle(DottedUnderlineStyle)
+}
+
+// DashedUnderline appends the dashed underline style attribute to the style.
+// This is a convenience method for UnderlineStyle(DashedUnderlineStyle).
+func (s Style) DashedUnderline() Style {
+	return s.UnderlineStyle(DashedUnderlineStyle)
+}
+
+// SlowBlink appends the slow blink style attribute to the style.
+func (s Style) SlowBlink() Style {
+	return append(s, slowBlinkAttr)
+}
+
+// RapidBlink appends the rapid blink style attribute to the style.
+func (s Style) RapidBlink() Style {
+	return append(s, rapidBlinkAttr)
+}
+
+// Reverse appends the reverse style attribute to the style.
+func (s Style) Reverse() Style {
+	return append(s, reverseAttr)
+}
+
+// Conceal appends the conceal style attribute to the style.
+func (s Style) Conceal() Style {
+	return append(s, concealAttr)
+}
+
+// Strikethrough appends the strikethrough style attribute to the style.
+func (s Style) Strikethrough() Style {
+	return append(s, strikethroughAttr)
+}
+
+// NormalIntensity appends the normal intensity style attribute to the style.
+func (s Style) NormalIntensity() Style {
+	return append(s, normalIntensityAttr)
+}
+
+// NoItalic appends the no italic style attribute to the style.
+func (s Style) NoItalic() Style {
+	return append(s, noItalicAttr)
+}
+
+// NoUnderline appends the no underline style attribute to the style.
+func (s Style) NoUnderline() Style {
+	return append(s, noUnderlineAttr)
+}
+
+// NoBlink appends the no blink style attribute to the style.
+func (s Style) NoBlink() Style {
+	return append(s, noBlinkAttr)
+}
+
+// NoReverse appends the no reverse style attribute to the style.
+func (s Style) NoReverse() Style {
+	return append(s, noReverseAttr)
+}
+
+// NoConceal appends the no conceal style attribute to the style.
+func (s Style) NoConceal() Style {
+	return append(s, noConcealAttr)
+}
+
+// NoStrikethrough appends the no strikethrough style attribute to the style.
+func (s Style) NoStrikethrough() Style {
+	return append(s, noStrikethroughAttr)
+}
+
+// DefaultForegroundColor appends the default foreground color style attribute to the style.
+func (s Style) DefaultForegroundColor() Style {
+	return append(s, defaultForegroundColorAttr)
+}
+
+// DefaultBackgroundColor appends the default background color style attribute to the style.
+func (s Style) DefaultBackgroundColor() Style {
+	return append(s, defaultBackgroundColorAttr)
+}
+
+// DefaultUnderlineColor appends the default underline color style attribute to the style.
+func (s Style) DefaultUnderlineColor() Style {
+	return append(s, defaultUnderlineColorAttr)
+}
+
+// ForegroundColor appends the foreground color style attribute to the style.
+func (s Style) ForegroundColor(c Color) Style {
+	return append(s, foregroundColorString(c))
+}
+
+// BackgroundColor appends the background color style attribute to the style.
+func (s Style) BackgroundColor(c Color) Style {
+	return append(s, backgroundColorString(c))
+}
+
+// UnderlineColor appends the underline color style attribute to the style.
+func (s Style) UnderlineColor(c Color) Style {
+	return append(s, underlineColorString(c))
+}
+
+// UnderlineStyle represents an ANSI SGR (Select Graphic Rendition) underline
+// style.
+type UnderlineStyle = byte
+
+const (
+	doubleUnderlineStyle = "4:2"
+	curlyUnderlineStyle  = "4:3"
+	dottedUnderlineStyle = "4:4"
+	dashedUnderlineStyle = "4:5"
+)
+
+const (
+	// NoUnderlineStyle is the default underline style.
+	NoUnderlineStyle UnderlineStyle = iota
+	// SingleUnderlineStyle is a single underline style.
+	SingleUnderlineStyle
+	// DoubleUnderlineStyle is a double underline style.
+	DoubleUnderlineStyle
+	// CurlyUnderlineStyle is a curly underline style.
+	CurlyUnderlineStyle
+	// DottedUnderlineStyle is a dotted underline style.
+	DottedUnderlineStyle
+	// DashedUnderlineStyle is a dashed underline style.
+	DashedUnderlineStyle
+)
+
+// SGR (Select Graphic Rendition) style attributes.
+// See: https://en.wikipedia.org/wiki/ANSI_escape_code#SGR_(Select_Graphic_Rendition)_parameters
+const (
+	ResetAttr                        Attr = 0
+	BoldAttr                         Attr = 1
+	FaintAttr                        Attr = 2
+	ItalicAttr                       Attr = 3
+	UnderlineAttr                    Attr = 4
+	SlowBlinkAttr                    Attr = 5
+	RapidBlinkAttr                   Attr = 6
+	ReverseAttr                      Attr = 7
+	ConcealAttr                      Attr = 8
+	StrikethroughAttr                Attr = 9
+	NormalIntensityAttr              Attr = 22
+	NoItalicAttr                     Attr = 23
+	NoUnderlineAttr                  Attr = 24
+	NoBlinkAttr                      Attr = 25
+	NoReverseAttr                    Attr = 27
+	NoConcealAttr                    Attr = 28
+	NoStrikethroughAttr              Attr = 29
+	BlackForegroundColorAttr         Attr = 30
+	RedForegroundColorAttr           Attr = 31
+	GreenForegroundColorAttr         Attr = 32
+	YellowForegroundColorAttr        Attr = 33
+	BlueForegroundColorAttr          Attr = 34
+	MagentaForegroundColorAttr       Attr = 35
+	CyanForegroundColorAttr          Attr = 36
+	WhiteForegroundColorAttr         Attr = 37
+	ExtendedForegroundColorAttr      Attr = 38
+	DefaultForegroundColorAttr       Attr = 39
+	BlackBackgroundColorAttr         Attr = 40
+	RedBackgroundColorAttr           Attr = 41
+	GreenBackgroundColorAttr         Attr = 42
+	YellowBackgroundColorAttr        Attr = 43
+	BlueBackgroundColorAttr          Attr = 44
+	MagentaBackgroundColorAttr       Attr = 45
+	CyanBackgroundColorAttr          Attr = 46
+	WhiteBackgroundColorAttr         Attr = 47
+	ExtendedBackgroundColorAttr      Attr = 48
+	DefaultBackgroundColorAttr       Attr = 49
+	ExtendedUnderlineColorAttr       Attr = 58
+	DefaultUnderlineColorAttr        Attr = 59
+	BrightBlackForegroundColorAttr   Attr = 90
+	BrightRedForegroundColorAttr     Attr = 91
+	BrightGreenForegroundColorAttr   Attr = 92
+	BrightYellowForegroundColorAttr  Attr = 93
+	BrightBlueForegroundColorAttr    Attr = 94
+	BrightMagentaForegroundColorAttr Attr = 95
+	BrightCyanForegroundColorAttr    Attr = 96
+	BrightWhiteForegroundColorAttr   Attr = 97
+	BrightBlackBackgroundColorAttr   Attr = 100
+	BrightRedBackgroundColorAttr     Attr = 101
+	BrightGreenBackgroundColorAttr   Attr = 102
+	BrightYellowBackgroundColorAttr  Attr = 103
+	BrightBlueBackgroundColorAttr    Attr = 104
+	BrightMagentaBackgroundColorAttr Attr = 105
+	BrightCyanBackgroundColorAttr    Attr = 106
+	BrightWhiteBackgroundColorAttr   Attr = 107
+
+	RGBColorIntroducerAttr      Attr = 2
+	ExtendedColorIntroducerAttr Attr = 5
+)
+
+const (
+	resetAttr                        = "0"
+	boldAttr                         = "1"
+	faintAttr                        = "2"
+	italicAttr                       = "3"
+	underlineAttr                    = "4"
+	slowBlinkAttr                    = "5"
+	rapidBlinkAttr                   = "6"
+	reverseAttr                      = "7"
+	concealAttr                      = "8"
+	strikethroughAttr                = "9"
+	normalIntensityAttr              = "22"
+	noItalicAttr                     = "23"
+	noUnderlineAttr                  = "24"
+	noBlinkAttr                      = "25"
+	noReverseAttr                    = "27"
+	noConcealAttr                    = "28"
+	noStrikethroughAttr              = "29"
+	blackForegroundColorAttr         = "30"
+	redForegroundColorAttr           = "31"
+	greenForegroundColorAttr         = "32"
+	yellowForegroundColorAttr        = "33"
+	blueForegroundColorAttr          = "34"
+	magentaForegroundColorAttr       = "35"
+	cyanForegroundColorAttr          = "36"
+	whiteForegroundColorAttr         = "37"
+	extendedForegroundColorAttr      = "38"
+	defaultForegroundColorAttr       = "39"
+	blackBackgroundColorAttr         = "40"
+	redBackgroundColorAttr           = "41"
+	greenBackgroundColorAttr         = "42"
+	yellowBackgroundColorAttr        = "43"
+	blueBackgroundColorAttr          = "44"
+	magentaBackgroundColorAttr       = "45"
+	cyanBackgroundColorAttr          = "46"
+	whiteBackgroundColorAttr         = "47"
+	extendedBackgroundColorAttr      = "48"
+	defaultBackgroundColorAttr       = "49"
+	extendedUnderlineColorAttr       = "58"
+	defaultUnderlineColorAttr        = "59"
+	brightBlackForegroundColorAttr   = "90"
+	brightRedForegroundColorAttr     = "91"
+	brightGreenForegroundColorAttr   = "92"
+	brightYellowForegroundColorAttr  = "93"
+	brightBlueForegroundColorAttr    = "94"
+	brightMagentaForegroundColorAttr = "95"
+	brightCyanForegroundColorAttr    = "96"
+	brightWhiteForegroundColorAttr   = "97"
+	brightBlackBackgroundColorAttr   = "100"
+	brightRedBackgroundColorAttr     = "101"
+	brightGreenBackgroundColorAttr   = "102"
+	brightYellowBackgroundColorAttr  = "103"
+	brightBlueBackgroundColorAttr    = "104"
+	brightMagentaBackgroundColorAttr = "105"
+	brightCyanBackgroundColorAttr    = "106"
+	brightWhiteBackgroundColorAttr   = "107"
+)
+
+// foregroundColorString returns the style SGR attribute for the given
+// foreground color.
+// See: https://en.wikipedia.org/wiki/ANSI_escape_code#SGR_(Select_Graphic_Rendition)_parameters
+func foregroundColorString(c Color) string {
+	switch c := c.(type) {
+	case BasicColor:
+		// 3-bit or 4-bit ANSI foreground
+		// "3<n>" or "9<n>" where n is the color number from 0 to 7
+		switch c {
+		case Black:
+			return blackForegroundColorAttr
+		case Red:
+			return redForegroundColorAttr
+		case Green:
+			return greenForegroundColorAttr
+		case Yellow:
+			return yellowForegroundColorAttr
+		case Blue:
+			return blueForegroundColorAttr
+		case Magenta:
+			return magentaForegroundColorAttr
+		case Cyan:
+			return cyanForegroundColorAttr
+		case White:
+			return whiteForegroundColorAttr
+		case BrightBlack:
+			return brightBlackForegroundColorAttr
+		case BrightRed:
+			return brightRedForegroundColorAttr
+		case BrightGreen:
+			return brightGreenForegroundColorAttr
+		case BrightYellow:
+			return brightYellowForegroundColorAttr
+		case BrightBlue:
+			return brightBlueForegroundColorAttr
+		case BrightMagenta:
+			return brightMagentaForegroundColorAttr
+		case BrightCyan:
+			return brightCyanForegroundColorAttr
+		case BrightWhite:
+			return brightWhiteForegroundColorAttr
+		}
+	case ExtendedColor:
+		// 256-color ANSI foreground
+		// "38;5;<n>"
+		return "38;5;" + strconv.FormatUint(uint64(c), 10)
+	case TrueColor, color.Color:
+		// 24-bit "true color" foreground
+		// "38;2;<r>;<g>;<b>"
+		r, g, b, _ := c.RGBA()
+		return "38;2;" +
+			strconv.FormatUint(uint64(shift(r)), 10) + ";" +
+			strconv.FormatUint(uint64(shift(g)), 10) + ";" +
+			strconv.FormatUint(uint64(shift(b)), 10)
+	}
+	return defaultForegroundColorAttr
+}
+
+// backgroundColorString returns the style SGR attribute for the given
+// background color.
+// See: https://en.wikipedia.org/wiki/ANSI_escape_code#SGR_(Select_Graphic_Rendition)_parameters
+func backgroundColorString(c Color) string {
+	switch c := c.(type) {
+	case BasicColor:
+		// 3-bit or 4-bit ANSI foreground
+		// "4<n>" or "10<n>" where n is the color number from 0 to 7
+		switch c {
+		case Black:
+			return blackBackgroundColorAttr
+		case Red:
+			return redBackgroundColorAttr
+		case Green:
+			return greenBackgroundColorAttr
+		case Yellow:
+			return yellowBackgroundColorAttr
+		case Blue:
+			return blueBackgroundColorAttr
+		case Magenta:
+			return magentaBackgroundColorAttr
+		case Cyan:
+			return cyanBackgroundColorAttr
+		case White:
+			return whiteBackgroundColorAttr
+		case BrightBlack:
+			return brightBlackBackgroundColorAttr
+		case BrightRed:
+			return brightRedBackgroundColorAttr
+		case BrightGreen:
+			return brightGreenBackgroundColorAttr
+		case BrightYellow:
+			return brightYellowBackgroundColorAttr
+		case BrightBlue:
+			return brightBlueBackgroundColorAttr
+		case BrightMagenta:
+			return brightMagentaBackgroundColorAttr
+		case BrightCyan:
+			return brightCyanBackgroundColorAttr
+		case BrightWhite:
+			return brightWhiteBackgroundColorAttr
+		}
+	case ExtendedColor:
+		// 256-color ANSI foreground
+		// "48;5;<n>"
+		return "48;5;" + strconv.FormatUint(uint64(c), 10)
+	case TrueColor, color.Color:
+		// 24-bit "true color" foreground
+		// "38;2;<r>;<g>;<b>"
+		r, g, b, _ := c.RGBA()
+		return "48;2;" +
+			strconv.FormatUint(uint64(shift(r)), 10) + ";" +
+			strconv.FormatUint(uint64(shift(g)), 10) + ";" +
+			strconv.FormatUint(uint64(shift(b)), 10)
+	}
+	return defaultBackgroundColorAttr
+}
+
+// underlineColorString returns the style SGR attribute for the given underline
+// color.
+// See: https://en.wikipedia.org/wiki/ANSI_escape_code#SGR_(Select_Graphic_Rendition)_parameters
+func underlineColorString(c Color) string {
+	switch c := c.(type) {
+	// NOTE: we can't use 3-bit and 4-bit ANSI color codes with underline
+	// color, use 256-color instead.
+	//
+	// 256-color ANSI underline color
+	// "58;5;<n>"
+	case BasicColor:
+		return "58;5;" + strconv.FormatUint(uint64(c), 10)
+	case ExtendedColor:
+		return "58;5;" + strconv.FormatUint(uint64(c), 10)
+	case TrueColor, color.Color:
+		// 24-bit "true color" foreground
+		// "38;2;<r>;<g>;<b>"
+		r, g, b, _ := c.RGBA()
+		return "58;2;" +
+			strconv.FormatUint(uint64(shift(r)), 10) + ";" +
+			strconv.FormatUint(uint64(shift(g)), 10) + ";" +
+			strconv.FormatUint(uint64(shift(b)), 10)
+	}
+	return defaultUnderlineColorAttr
+}
+
+// ReadStyleColor decodes a color from a slice of parameters. It returns the
+// number of parameters read and the color. This function is used to read SGR
+// color parameters following the ITU T.416 standard.
+//
+// It supports reading the following color types:
+//   - 0: implementation defined
+//   - 1: transparent
+//   - 2: RGB direct color
+//   - 3: CMY direct color
+//   - 4: CMYK direct color
+//   - 5: indexed color
+//   - 6: RGBA direct color (WezTerm extension)
+//
+// The parameters can be separated by semicolons (;) or colons (:). Mixing
+// separators is not allowed.
+//
+// The specs supports defining a color space id, a color tolerance value, and a
+// tolerance color space id. However, these values have no effect on the
+// returned color and will be ignored.
+//
+// This implementation includes a few modifications to the specs:
+//  1. Support for legacy color values separated by semicolons (;) with respect to RGB, and indexed colors
+//  2. Support ignoring and omitting the color space id (second parameter) with respect to RGB colors
+//  3. Support ignoring and omitting the 6th parameter with respect to RGB and CMY colors
+//  4. Support reading RGBA colors
+func ReadStyleColor(params Params, co *color.Color) (n int) {
+	if len(params) < 2 { // Need at least SGR type and color type
+		return 0
+	}
+
+	// First parameter indicates one of 38, 48, or 58 (foreground, background, or underline)
+	s := params[0]
+	p := params[1]
+	colorType := p.Param(0)
+	n = 2
+
+	paramsfn := func() (p1, p2, p3, p4 int) {
+		// Where should we start reading the color?
+		switch {
+		case s.HasMore() && p.HasMore() && len(params) > 8 && params[2].HasMore() && params[3].HasMore() && params[4].HasMore() && params[5].HasMore() && params[6].HasMore() && params[7].HasMore():
+			// We have color space id, a 6th parameter, a tolerance value, and a tolerance color space
+			n += 7
+			return params[3].Param(0), params[4].Param(0), params[5].Param(0), params[6].Param(0)
+		case s.HasMore() && p.HasMore() && len(params) > 7 && params[2].HasMore() && params[3].HasMore() && params[4].HasMore() && params[5].HasMore() && params[6].HasMore():
+			// We have color space id, a 6th parameter, and a tolerance value
+			n += 6
+			return params[3].Param(0), params[4].Param(0), params[5].Param(0), params[6].Param(0)
+		case s.HasMore() && p.HasMore() && len(params) > 6 && params[2].HasMore() && params[3].HasMore() && params[4].HasMore() && params[5].HasMore():
+			// We have color space id and a 6th parameter
+			// 48 : 4 : : 1 : 2 : 3 :4
+			n += 5
+			return params[3].Param(0), params[4].Param(0), params[5].Param(0), params[6].Param(0)
+		case s.HasMore() && p.HasMore() && len(params) > 5 && params[2].HasMore() && params[3].HasMore() && params[4].HasMore() && !params[5].HasMore():
+			// We have color space
+			// 48 : 3 : : 1 : 2 : 3
+			n += 4
+			return params[3].Param(0), params[4].Param(0), params[5].Param(0), -1
+		case s.HasMore() && p.HasMore() && p.Param(0) == 2 && params[2].HasMore() && params[3].HasMore() && !params[4].HasMore():
+			// We have color values separated by colons (:)
+			// 48 : 2 : 1 : 2 : 3
+			fallthrough
+		case !s.HasMore() && !p.HasMore() && p.Param(0) == 2 && !params[2].HasMore() && !params[3].HasMore() && !params[4].HasMore():
+			// Support legacy color values separated by semicolons (;)
+			// 48 ; 2 ; 1 ; 2 ; 3
+			n += 3
+			return params[2].Param(0), params[3].Param(0), params[4].Param(0), -1
+		}
+		// Ambiguous SGR color
+		return -1, -1, -1, -1
+	}
+
+	switch colorType {
+	case 0: // implementation defined
+		return 2
+	case 1: // transparent
+		*co = color.Transparent
+		return 2
+	case 2: // RGB direct color
+		if len(params) < 5 {
+			return 0
+		}
+
+		r, g, b, _ := paramsfn()
+		if r == -1 || g == -1 || b == -1 {
+			return 0
+		}
+
+		*co = color.RGBA{
+			R: uint8(r), //nolint:gosec
+			G: uint8(g), //nolint:gosec
+			B: uint8(b), //nolint:gosec
+			A: 0xff,
+		}
+		return //nolint:nakedret
+
+	case 3: // CMY direct color
+		if len(params) < 5 {
+			return 0
+		}
+
+		c, m, y, _ := paramsfn()
+		if c == -1 || m == -1 || y == -1 {
+			return 0
+		}
+
+		*co = color.CMYK{
+			C: uint8(c), //nolint:gosec
+			M: uint8(m), //nolint:gosec
+			Y: uint8(y), //nolint:gosec
+			K: 0,
+		}
+		return //nolint:nakedret
+
+	case 4: // CMYK direct color
+		if len(params) < 6 {
+			return 0
+		}
+
+		c, m, y, k := paramsfn()
+		if c == -1 || m == -1 || y == -1 || k == -1 {
+			return 0
+		}
+
+		*co = color.CMYK{
+			C: uint8(c), //nolint:gosec
+			M: uint8(m), //nolint:gosec
+			Y: uint8(y), //nolint:gosec
+			K: uint8(k), //nolint:gosec
+		}
+		return //nolint:nakedret
+
+	case 5: // indexed color
+		if len(params) < 3 {
+			return 0
+		}
+		switch {
+		case s.HasMore() && p.HasMore() && !params[2].HasMore():
+			// Colon separated indexed color
+			// 38 : 5 : 234
+		case !s.HasMore() && !p.HasMore() && !params[2].HasMore():
+			// Legacy semicolon indexed color
+			// 38 ; 5 ; 234
+		default:
+			return 0
+		}
+		*co = ExtendedColor(params[2].Param(0)) //nolint:gosec
+		return 3
+
+	case 6: // RGBA direct color
+		if len(params) < 6 {
+			return 0
+		}
+
+		r, g, b, a := paramsfn()
+		if r == -1 || g == -1 || b == -1 || a == -1 {
+			return 0
+		}
+
+		*co = color.RGBA{
+			R: uint8(r), //nolint:gosec
+			G: uint8(g), //nolint:gosec
+			B: uint8(b), //nolint:gosec
+			A: uint8(a), //nolint:gosec
+		}
+		return //nolint:nakedret
+
+	default:
+		return 0
+	}
+}

vendor/github.com/charmbracelet/x/ansi/termcap.go

@@ -0,0 +1,41 @@
+package ansi
+
+import (
+	"encoding/hex"
+	"strings"
+)
+
+// XTGETTCAP (RequestTermcap) requests Termcap/Terminfo strings.
+//
+//	DCS + q <Pt> ST
+//
+// Where <Pt> is a list of Termcap/Terminfo capabilities, encoded in 2-digit
+// hexadecimals, separated by semicolons.
+//
+// See: https://man7.org/linux/man-pages/man5/terminfo.5.html
+// See: https://invisible-island.net/xterm/ctlseqs/ctlseqs.html#h3-Operating-System-Commands
+func XTGETTCAP(caps ...string) string {
+	if len(caps) == 0 {
+		return ""
+	}
+
+	s := "\x1bP+q"
+	for i, c := range caps {
+		if i > 0 {
+			s += ";"
+		}
+		s += strings.ToUpper(hex.EncodeToString([]byte(c)))
+	}
+
+	return s + "\x1b\\"
+}
+
+// RequestTermcap is an alias for [XTGETTCAP].
+func RequestTermcap(caps ...string) string {
+	return XTGETTCAP(caps...)
+}
+
+// RequestTerminfo is an alias for [XTGETTCAP].
+func RequestTerminfo(caps ...string) string {
+	return XTGETTCAP(caps...)
+}

vendor/github.com/charmbracelet/x/ansi/title.go

@@ -0,0 +1,48 @@
+package ansi
+
+// SetIconNameWindowTitle returns a sequence for setting the icon name and
+// window title.
+//
+//	OSC 0 ; title ST
+//	OSC 0 ; title BEL
+//
+// See: https://invisible-island.net/xterm/ctlseqs/ctlseqs.html#h2-Operating-System-Commands
+func SetIconNameWindowTitle(s string) string {
+	return "\x1b]0;" + s + "\x07"
+}
+
+// SetIconName returns a sequence for setting the icon name.
+//
+//	OSC 1 ; title ST
+//	OSC 1 ; title BEL
+//
+// See: https://invisible-island.net/xterm/ctlseqs/ctlseqs.html#h2-Operating-System-Commands
+func SetIconName(s string) string {
+	return "\x1b]1;" + s + "\x07"
+}
+
+// SetWindowTitle returns a sequence for setting the window title.
+//
+//	OSC 2 ; title ST
+//	OSC 2 ; title BEL
+//
+// See: https://invisible-island.net/xterm/ctlseqs/ctlseqs.html#h2-Operating-System-Commands
+func SetWindowTitle(s string) string {
+	return "\x1b]2;" + s + "\x07"
+}
+
+// DECSWT is a sequence for setting the window title.
+//
+// This is an alias for [SetWindowTitle]("1;<name>").
+// See: EK-VT520-RM 5–156 https://vt100.net/dec/ek-vt520-rm.pdf
+func DECSWT(name string) string {
+	return SetWindowTitle("1;" + name)
+}
+
+// DECSIN is a sequence for setting the icon name.
+//
+// This is an alias for [SetWindowTitle]("L;<name>").
+// See: EK-VT520-RM 5–134 https://vt100.net/dec/ek-vt520-rm.pdf
+func DECSIN(name string) string {
+	return SetWindowTitle("L;" + name)
+}

vendor/github.com/charmbracelet/x/ansi/truncate.go

@@ -0,0 +1,299 @@
+package ansi
+
+import (
+	"bytes"
+
+	"github.com/charmbracelet/x/ansi/parser"
+	"github.com/mattn/go-runewidth"
+	"github.com/rivo/uniseg"
+)
+
+// Cut the string, without adding any prefix or tail strings. This function is
+// aware of ANSI escape codes and will not break them, and accounts for
+// wide-characters (such as East-Asian characters and emojis).
+// This treats the text as a sequence of graphemes.
+func Cut(s string, left, right int) string {
+	return cut(GraphemeWidth, s, left, right)
+}
+
+// CutWc the string, without adding any prefix or tail strings. This function is
+// aware of ANSI escape codes and will not break them, and accounts for
+// wide-characters (such as East-Asian characters and emojis).
+// Note that the [left] parameter is inclusive, while [right] isn't,
+// which is to say it'll return `[left, right)`.
+//
+// This treats the text as a sequence of wide characters and runes.
+func CutWc(s string, left, right int) string {
+	return cut(WcWidth, s, left, right)
+}
+
+func cut(m Method, s string, left, right int) string {
+	if right <= left {
+		return ""
+	}
+
+	truncate := Truncate
+	truncateLeft := TruncateLeft
+	if m == WcWidth {
+		truncate = TruncateWc
+		truncateLeft = TruncateWc
+	}
+
+	if left == 0 {
+		return truncate(s, right, "")
+	}
+	return truncateLeft(truncate(s, right, ""), left, "")
+}
+
+// Truncate truncates a string to a given length, adding a tail to the end if
+// the string is longer than the given length. This function is aware of ANSI
+// escape codes and will not break them, and accounts for wide-characters (such
+// as East-Asian characters and emojis).
+// This treats the text as a sequence of graphemes.
+func Truncate(s string, length int, tail string) string {
+	return truncate(GraphemeWidth, s, length, tail)
+}
+
+// TruncateWc truncates a string to a given length, adding a tail to the end if
+// the string is longer than the given length. This function is aware of ANSI
+// escape codes and will not break them, and accounts for wide-characters (such
+// as East-Asian characters and emojis).
+// This treats the text as a sequence of wide characters and runes.
+func TruncateWc(s string, length int, tail string) string {
+	return truncate(WcWidth, s, length, tail)
+}
+
+func truncate(m Method, s string, length int, tail string) string {
+	if sw := StringWidth(s); sw <= length {
+		return s
+	}
+
+	tw := StringWidth(tail)
+	length -= tw
+	if length < 0 {
+		return ""
+	}
+
+	var cluster []byte
+	var buf bytes.Buffer
+	curWidth := 0
+	ignoring := false
+	pstate := parser.GroundState // initial state
+	b := []byte(s)
+	i := 0
+
+	// Here we iterate over the bytes of the string and collect printable
+	// characters and runes. We also keep track of the width of the string
+	// in cells.
+	//
+	// Once we reach the given length, we start ignoring characters and only
+	// collect ANSI escape codes until we reach the end of string.
+	for i < len(b) {
+		state, action := parser.Table.Transition(pstate, b[i])
+		if state == parser.Utf8State {
+			// This action happens when we transition to the Utf8State.
+			var width int
+			cluster, _, width, _ = uniseg.FirstGraphemeCluster(b[i:], -1)
+			if m == WcWidth {
+				width = runewidth.StringWidth(string(cluster))
+			}
+
+			// increment the index by the length of the cluster
+			i += len(cluster)
+			curWidth += width
+
+			// Are we ignoring? Skip to the next byte
+			if ignoring {
+				continue
+			}
+
+			// Is this gonna be too wide?
+			// If so write the tail and stop collecting.
+			if curWidth > length && !ignoring {
+				ignoring = true
+				buf.WriteString(tail)
+			}
+
+			if curWidth > length {
+				continue
+			}
+
+			buf.Write(cluster)
+
+			// Done collecting, now we're back in the ground state.
+			pstate = parser.GroundState
+			continue
+		}
+
+		switch action {
+		case parser.PrintAction:
+			// Is this gonna be too wide?
+			// If so write the tail and stop collecting.
+			if curWidth >= length && !ignoring {
+				ignoring = true
+				buf.WriteString(tail)
+			}
+
+			// Skip to the next byte if we're ignoring
+			if ignoring {
+				i++
+				continue
+			}
+
+			// collects printable ASCII
+			curWidth++
+			fallthrough
+		case parser.ExecuteAction:
+			// execute action will be things like \n, which, if outside the cut,
+			// should be ignored.
+			if ignoring {
+				i++
+				continue
+			}
+			fallthrough
+		default:
+			buf.WriteByte(b[i])
+			i++
+		}
+
+		// Transition to the next state.
+		pstate = state
+
+		// Once we reach the given length, we start ignoring runes and write
+		// the tail to the buffer.
+		if curWidth > length && !ignoring {
+			ignoring = true
+			buf.WriteString(tail)
+		}
+	}
+
+	return buf.String()
+}
+
+// TruncateLeft truncates a string from the left side by removing n characters,
+// adding a prefix to the beginning if the string is longer than n.
+// This function is aware of ANSI escape codes and will not break them, and
+// accounts for wide-characters (such as East-Asian characters and emojis).
+// This treats the text as a sequence of graphemes.
+func TruncateLeft(s string, n int, prefix string) string {
+	return truncateLeft(GraphemeWidth, s, n, prefix)
+}
+
+// TruncateLeftWc truncates a string from the left side by removing n characters,
+// adding a prefix to the beginning if the string is longer than n.
+// This function is aware of ANSI escape codes and will not break them, and
+// accounts for wide-characters (such as East-Asian characters and emojis).
+// This treats the text as a sequence of wide characters and runes.
+func TruncateLeftWc(s string, n int, prefix string) string {
+	return truncateLeft(WcWidth, s, n, prefix)
+}
+
+func truncateLeft(m Method, s string, n int, prefix string) string {
+	if n <= 0 {
+		return s
+	}
+
+	var cluster []byte
+	var buf bytes.Buffer
+	curWidth := 0
+	ignoring := true
+	pstate := parser.GroundState
+	b := []byte(s)
+	i := 0
+
+	for i < len(b) {
+		if !ignoring {
+			buf.Write(b[i:])
+			break
+		}
+
+		state, action := parser.Table.Transition(pstate, b[i])
+		if state == parser.Utf8State {
+			var width int
+			cluster, _, width, _ = uniseg.FirstGraphemeCluster(b[i:], -1)
+			if m == WcWidth {
+				width = runewidth.StringWidth(string(cluster))
+			}
+
+			i += len(cluster)
+			curWidth += width
+
+			if curWidth > n && ignoring {
+				ignoring = false
+				buf.WriteString(prefix)
+			}
+
+			if curWidth > n {
+				buf.Write(cluster)
+			}
+
+			if ignoring {
+				continue
+			}
+
+			pstate = parser.GroundState
+			continue
+		}
+
+		switch action {
+		case parser.PrintAction:
+			curWidth++
+
+			if curWidth > n && ignoring {
+				ignoring = false
+				buf.WriteString(prefix)
+			}
+
+			if ignoring {
+				i++
+				continue
+			}
+
+			fallthrough
+		case parser.ExecuteAction:
+			// execute action will be things like \n, which, if outside the cut,
+			// should be ignored.
+			if ignoring {
+				i++
+				continue
+			}
+			fallthrough
+		default:
+			buf.WriteByte(b[i])
+			i++
+		}
+
+		pstate = state
+		if curWidth > n && ignoring {
+			ignoring = false
+			buf.WriteString(prefix)
+		}
+	}
+
+	return buf.String()
+}
+
+// ByteToGraphemeRange takes start and stop byte positions and converts them to
+// grapheme-aware char positions.
+// You can use this with [Truncate], [TruncateLeft], and [Cut].
+func ByteToGraphemeRange(str string, byteStart, byteStop int) (charStart, charStop int) {
+	bytePos, charPos := 0, 0
+	gr := uniseg.NewGraphemes(str)
+	for byteStart > bytePos {
+		if !gr.Next() {
+			break
+		}
+		bytePos += len(gr.Str())
+		charPos += max(1, gr.Width())
+	}
+	charStart = charPos
+	for byteStop > bytePos {
+		if !gr.Next() {
+			break
+		}
+		bytePos += len(gr.Str())
+		charPos += max(1, gr.Width())
+	}
+	charStop = charPos
+	return
+}

vendor/github.com/charmbracelet/x/ansi/util.go

@@ -0,0 +1,92 @@
+package ansi
+
+import (
+	"fmt"
+	"image/color"
+	"strconv"
+	"strings"
+
+	"github.com/lucasb-eyer/go-colorful"
+)
+
+// colorToHexString returns a hex string representation of a color.
+func colorToHexString(c color.Color) string { //nolint:unused
+	if c == nil {
+		return ""
+	}
+	shift := func(v uint32) uint32 {
+		if v > 0xff {
+			return v >> 8
+		}
+		return v
+	}
+	r, g, b, _ := c.RGBA()
+	r, g, b = shift(r), shift(g), shift(b)
+	return fmt.Sprintf("#%02x%02x%02x", r, g, b)
+}
+
+// rgbToHex converts red, green, and blue values to a hexadecimal value.
+//
+//	hex := rgbToHex(0, 0, 255) // 0x0000FF
+func rgbToHex(r, g, b uint32) uint32 { //nolint:unused
+	return r<<16 + g<<8 + b
+}
+
+type shiftable interface {
+	~uint | ~uint16 | ~uint32 | ~uint64
+}
+
+func shift[T shiftable](x T) T {
+	if x > 0xff {
+		x >>= 8
+	}
+	return x
+}
+
+// XParseColor is a helper function that parses a string into a color.Color. It
+// provides a similar interface to the XParseColor function in Xlib. It
+// supports the following formats:
+//
+//   - #RGB
+//   - #RRGGBB
+//   - rgb:RRRR/GGGG/BBBB
+//   - rgba:RRRR/GGGG/BBBB/AAAA
+//
+// If the string is not a valid color, nil is returned.
+//
+// See: https://linux.die.net/man/3/xparsecolor
+func XParseColor(s string) color.Color {
+	switch {
+	case strings.HasPrefix(s, "#"):
+		c, err := colorful.Hex(s)
+		if err != nil {
+			return nil
+		}
+
+		return c
+	case strings.HasPrefix(s, "rgb:"):
+		parts := strings.Split(s[4:], "/")
+		if len(parts) != 3 {
+			return nil
+		}
+
+		r, _ := strconv.ParseUint(parts[0], 16, 32)
+		g, _ := strconv.ParseUint(parts[1], 16, 32)
+		b, _ := strconv.ParseUint(parts[2], 16, 32)
+
+		return color.RGBA{uint8(shift(r)), uint8(shift(g)), uint8(shift(b)), 255} //nolint:gosec
+	case strings.HasPrefix(s, "rgba:"):
+		parts := strings.Split(s[5:], "/")
+		if len(parts) != 4 {
+			return nil
+		}
+
+		r, _ := strconv.ParseUint(parts[0], 16, 32)
+		g, _ := strconv.ParseUint(parts[1], 16, 32)
+		b, _ := strconv.ParseUint(parts[2], 16, 32)
+		a, _ := strconv.ParseUint(parts[3], 16, 32)
+
+		return color.RGBA{uint8(shift(r)), uint8(shift(g)), uint8(shift(b)), uint8(shift(a))} //nolint:gosec
+	}
+	return nil
+}

vendor/github.com/charmbracelet/x/ansi/width.go

@@ -0,0 +1,113 @@
+package ansi
+
+import (
+	"bytes"
+
+	"github.com/charmbracelet/x/ansi/parser"
+	"github.com/mattn/go-runewidth"
+	"github.com/rivo/uniseg"
+)
+
+// Strip removes ANSI escape codes from a string.
+func Strip(s string) string {
+	var (
+		buf    bytes.Buffer         // buffer for collecting printable characters
+		ri     int                  // rune index
+		rw     int                  // rune width
+		pstate = parser.GroundState // initial state
+	)
+
+	// This implements a subset of the Parser to only collect runes and
+	// printable characters.
+	for i := range len(s) {
+		if pstate == parser.Utf8State {
+			// During this state, collect rw bytes to form a valid rune in the
+			// buffer. After getting all the rune bytes into the buffer,
+			// transition to GroundState and reset the counters.
+			buf.WriteByte(s[i])
+			ri++
+			if ri < rw {
+				continue
+			}
+			pstate = parser.GroundState
+			ri = 0
+			rw = 0
+			continue
+		}
+
+		state, action := parser.Table.Transition(pstate, s[i])
+		switch action {
+		case parser.CollectAction:
+			if state == parser.Utf8State {
+				// This action happens when we transition to the Utf8State.
+				rw = utf8ByteLen(s[i])
+				buf.WriteByte(s[i])
+				ri++
+			}
+		case parser.PrintAction, parser.ExecuteAction:
+			// collects printable ASCII and non-printable characters
+			buf.WriteByte(s[i])
+		}
+
+		// Transition to the next state.
+		// The Utf8State is managed separately above.
+		if pstate != parser.Utf8State {
+			pstate = state
+		}
+	}
+
+	return buf.String()
+}
+
+// StringWidth returns the width of a string in cells. This is the number of
+// cells that the string will occupy when printed in a terminal. ANSI escape
+// codes are ignored and wide characters (such as East Asians and emojis) are
+// accounted for.
+// This treats the text as a sequence of grapheme clusters.
+func StringWidth(s string) int {
+	return stringWidth(GraphemeWidth, s)
+}
+
+// StringWidthWc returns the width of a string in cells. This is the number of
+// cells that the string will occupy when printed in a terminal. ANSI escape
+// codes are ignored and wide characters (such as East Asians and emojis) are
+// accounted for.
+// This treats the text as a sequence of wide characters and runes.
+func StringWidthWc(s string) int {
+	return stringWidth(WcWidth, s)
+}
+
+func stringWidth(m Method, s string) int {
+	if s == "" {
+		return 0
+	}
+
+	var (
+		pstate  = parser.GroundState // initial state
+		cluster string
+		width   int
+	)
+
+	for i := 0; i < len(s); i++ {
+		state, action := parser.Table.Transition(pstate, s[i])
+		if state == parser.Utf8State {
+			var w int
+			cluster, _, w, _ = uniseg.FirstGraphemeClusterInString(s[i:], -1)
+			if m == WcWidth {
+				w = runewidth.StringWidth(cluster)
+			}
+			width += w
+			i += len(cluster) - 1
+			pstate = parser.GroundState
+			continue
+		}
+
+		if action == parser.PrintAction {
+			width++
+		}
+
+		pstate = state
+	}
+
+	return width
+}

vendor/github.com/charmbracelet/x/ansi/winop.go

@@ -0,0 +1,53 @@
+package ansi
+
+import (
+	"strconv"
+	"strings"
+)
+
+const (
+	// ResizeWindowWinOp is a window operation that resizes the terminal
+	// window.
+	ResizeWindowWinOp = 4
+
+	// RequestWindowSizeWinOp is a window operation that requests a report of
+	// the size of the terminal window in pixels. The response is in the form:
+	//  CSI 4 ; height ; width t
+	RequestWindowSizeWinOp = 14
+
+	// RequestCellSizeWinOp is a window operation that requests a report of
+	// the size of the terminal cell size in pixels. The response is in the form:
+	//  CSI 6 ; height ; width t
+	RequestCellSizeWinOp = 16
+)
+
+// WindowOp (XTWINOPS) is a sequence that manipulates the terminal window.
+//
+//	CSI Ps ; Ps ; Ps t
+//
+// Ps is a semicolon-separated list of parameters.
+// See https://invisible-island.net/xterm/ctlseqs/ctlseqs.html#h4-Functions-using-CSI-_-ordered-by-the-final-character-lparen-s-rparen:CSI-Ps;Ps;Ps-t.1EB0
+func WindowOp(p int, ps ...int) string {
+	if p <= 0 {
+		return ""
+	}
+
+	if len(ps) == 0 {
+		return "\x1b[" + strconv.Itoa(p) + "t"
+	}
+
+	params := make([]string, 0, len(ps)+1)
+	params = append(params, strconv.Itoa(p))
+	for _, p := range ps {
+		if p >= 0 {
+			params = append(params, strconv.Itoa(p))
+		}
+	}
+
+	return "\x1b[" + strings.Join(params, ";") + "t"
+}
+
+// XTWINOPS is an alias for [WindowOp].
+func XTWINOPS(p int, ps ...int) string {
+	return WindowOp(p, ps...)
+}

vendor/github.com/charmbracelet/x/ansi/wrap.go

@@ -0,0 +1,474 @@
+package ansi
+
+import (
+	"bytes"
+	"unicode"
+	"unicode/utf8"
+
+	"github.com/charmbracelet/x/ansi/parser"
+	"github.com/mattn/go-runewidth"
+	"github.com/rivo/uniseg"
+)
+
+// nbsp is a non-breaking space.
+const nbsp = 0xA0
+
+// Hardwrap wraps a string or a block of text to a given line length, breaking
+// word boundaries. This will preserve ANSI escape codes and will account for
+// wide-characters in the string.
+// When preserveSpace is true, spaces at the beginning of a line will be
+// preserved.
+// This treats the text as a sequence of graphemes.
+func Hardwrap(s string, limit int, preserveSpace bool) string {
+	return hardwrap(GraphemeWidth, s, limit, preserveSpace)
+}
+
+// HardwrapWc wraps a string or a block of text to a given line length, breaking
+// word boundaries. This will preserve ANSI escape codes and will account for
+// wide-characters in the string.
+// When preserveSpace is true, spaces at the beginning of a line will be
+// preserved.
+// This treats the text as a sequence of wide characters and runes.
+func HardwrapWc(s string, limit int, preserveSpace bool) string {
+	return hardwrap(WcWidth, s, limit, preserveSpace)
+}
+
+func hardwrap(m Method, s string, limit int, preserveSpace bool) string {
+	if limit < 1 {
+		return s
+	}
+
+	var (
+		cluster      []byte
+		buf          bytes.Buffer
+		curWidth     int
+		forceNewline bool
+		pstate       = parser.GroundState // initial state
+		b            = []byte(s)
+	)
+
+	addNewline := func() {
+		buf.WriteByte('\n')
+		curWidth = 0
+	}
+
+	i := 0
+	for i < len(b) {
+		state, action := parser.Table.Transition(pstate, b[i])
+		if state == parser.Utf8State { //nolint:nestif
+			var width int
+			cluster, _, width, _ = uniseg.FirstGraphemeCluster(b[i:], -1)
+			if m == WcWidth {
+				width = runewidth.StringWidth(string(cluster))
+			}
+			i += len(cluster)
+
+			if curWidth+width > limit {
+				addNewline()
+			}
+			if !preserveSpace && curWidth == 0 && len(cluster) <= 4 {
+				// Skip spaces at the beginning of a line
+				if r, _ := utf8.DecodeRune(cluster); r != utf8.RuneError && unicode.IsSpace(r) {
+					pstate = parser.GroundState
+					continue
+				}
+			}
+
+			buf.Write(cluster)
+			curWidth += width
+			pstate = parser.GroundState
+			continue
+		}
+
+		switch action {
+		case parser.PrintAction, parser.ExecuteAction:
+			if b[i] == '\n' {
+				addNewline()
+				forceNewline = false
+				break
+			}
+
+			if curWidth+1 > limit {
+				addNewline()
+				forceNewline = true
+			}
+
+			// Skip spaces at the beginning of a line
+			if curWidth == 0 {
+				if !preserveSpace && forceNewline && unicode.IsSpace(rune(b[i])) {
+					break
+				}
+				forceNewline = false
+			}
+
+			buf.WriteByte(b[i])
+			if action == parser.PrintAction {
+				curWidth++
+			}
+		default:
+			buf.WriteByte(b[i])
+		}
+
+		// We manage the UTF8 state separately manually above.
+		if pstate != parser.Utf8State {
+			pstate = state
+		}
+		i++
+	}
+
+	return buf.String()
+}
+
+// Wordwrap wraps a string or a block of text to a given line length, not
+// breaking word boundaries. This will preserve ANSI escape codes and will
+// account for wide-characters in the string.
+// The breakpoints string is a list of characters that are considered
+// breakpoints for word wrapping. A hyphen (-) is always considered a
+// breakpoint.
+//
+// Note: breakpoints must be a string of 1-cell wide rune characters.
+//
+// This treats the text as a sequence of graphemes.
+func Wordwrap(s string, limit int, breakpoints string) string {
+	return wordwrap(GraphemeWidth, s, limit, breakpoints)
+}
+
+// WordwrapWc wraps a string or a block of text to a given line length, not
+// breaking word boundaries. This will preserve ANSI escape codes and will
+// account for wide-characters in the string.
+// The breakpoints string is a list of characters that are considered
+// breakpoints for word wrapping. A hyphen (-) is always considered a
+// breakpoint.
+//
+// Note: breakpoints must be a string of 1-cell wide rune characters.
+//
+// This treats the text as a sequence of wide characters and runes.
+func WordwrapWc(s string, limit int, breakpoints string) string {
+	return wordwrap(WcWidth, s, limit, breakpoints)
+}
+
+func wordwrap(m Method, s string, limit int, breakpoints string) string {
+	if limit < 1 {
+		return s
+	}
+
+	var (
+		cluster  []byte
+		buf      bytes.Buffer
+		word     bytes.Buffer
+		space    bytes.Buffer
+		curWidth int
+		wordLen  int
+		pstate   = parser.GroundState // initial state
+		b        = []byte(s)
+	)
+
+	addSpace := func() {
+		curWidth += space.Len()
+		buf.Write(space.Bytes())
+		space.Reset()
+	}
+
+	addWord := func() {
+		if word.Len() == 0 {
+			return
+		}
+
+		addSpace()
+		curWidth += wordLen
+		buf.Write(word.Bytes())
+		word.Reset()
+		wordLen = 0
+	}
+
+	addNewline := func() {
+		buf.WriteByte('\n')
+		curWidth = 0
+		space.Reset()
+	}
+
+	i := 0
+	for i < len(b) {
+		state, action := parser.Table.Transition(pstate, b[i])
+		if state == parser.Utf8State { //nolint:nestif
+			var width int
+			cluster, _, width, _ = uniseg.FirstGraphemeCluster(b[i:], -1)
+			if m == WcWidth {
+				width = runewidth.StringWidth(string(cluster))
+			}
+			i += len(cluster)
+
+			r, _ := utf8.DecodeRune(cluster)
+			if r != utf8.RuneError && unicode.IsSpace(r) && r != nbsp {
+				addWord()
+				space.WriteRune(r)
+			} else if bytes.ContainsAny(cluster, breakpoints) {
+				addSpace()
+				addWord()
+				buf.Write(cluster)
+				curWidth++
+			} else {
+				word.Write(cluster)
+				wordLen += width
+				if curWidth+space.Len()+wordLen > limit &&
+					wordLen < limit {
+					addNewline()
+				}
+			}
+
+			pstate = parser.GroundState
+			continue
+		}
+
+		switch action {
+		case parser.PrintAction, parser.ExecuteAction:
+			r := rune(b[i])
+			switch {
+			case r == '\n':
+				if wordLen == 0 {
+					if curWidth+space.Len() > limit {
+						curWidth = 0
+					} else {
+						buf.Write(space.Bytes())
+					}
+					space.Reset()
+				}
+
+				addWord()
+				addNewline()
+			case unicode.IsSpace(r):
+				addWord()
+				space.WriteByte(b[i])
+			case r == '-':
+				fallthrough
+			case runeContainsAny(r, breakpoints):
+				addSpace()
+				addWord()
+				buf.WriteByte(b[i])
+				curWidth++
+			default:
+				word.WriteByte(b[i])
+				wordLen++
+				if curWidth+space.Len()+wordLen > limit &&
+					wordLen < limit {
+					addNewline()
+				}
+			}
+
+		default:
+			word.WriteByte(b[i])
+		}
+
+		// We manage the UTF8 state separately manually above.
+		if pstate != parser.Utf8State {
+			pstate = state
+		}
+		i++
+	}
+
+	addWord()
+
+	return buf.String()
+}
+
+// Wrap wraps a string or a block of text to a given line length, breaking word
+// boundaries if necessary. This will preserve ANSI escape codes and will
+// account for wide-characters in the string. The breakpoints string is a list
+// of characters that are considered breakpoints for word wrapping. A hyphen
+// (-) is always considered a breakpoint.
+//
+// Note: breakpoints must be a string of 1-cell wide rune characters.
+//
+// This treats the text as a sequence of graphemes.
+func Wrap(s string, limit int, breakpoints string) string {
+	return wrap(GraphemeWidth, s, limit, breakpoints)
+}
+
+// WrapWc wraps a string or a block of text to a given line length, breaking word
+// boundaries if necessary. This will preserve ANSI escape codes and will
+// account for wide-characters in the string. The breakpoints string is a list
+// of characters that are considered breakpoints for word wrapping. A hyphen
+// (-) is always considered a breakpoint.
+//
+// Note: breakpoints must be a string of 1-cell wide rune characters.
+//
+// This treats the text as a sequence of wide characters and runes.
+func WrapWc(s string, limit int, breakpoints string) string {
+	return wrap(WcWidth, s, limit, breakpoints)
+}
+
+func wrap(m Method, s string, limit int, breakpoints string) string {
+	if limit < 1 {
+		return s
+	}
+
+	var (
+		cluster    []byte
+		buf        bytes.Buffer
+		word       bytes.Buffer
+		space      bytes.Buffer
+		spaceWidth int                  // width of the space buffer
+		curWidth   int                  // written width of the line
+		wordLen    int                  // word buffer len without ANSI escape codes
+		pstate     = parser.GroundState // initial state
+		b          = []byte(s)
+	)
+
+	addSpace := func() {
+		curWidth += spaceWidth
+		buf.Write(space.Bytes())
+		space.Reset()
+		spaceWidth = 0
+	}
+
+	addWord := func() {
+		if word.Len() == 0 {
+			return
+		}
+
+		addSpace()
+		curWidth += wordLen
+		buf.Write(word.Bytes())
+		word.Reset()
+		wordLen = 0
+	}
+
+	addNewline := func() {
+		buf.WriteByte('\n')
+		curWidth = 0
+		space.Reset()
+		spaceWidth = 0
+	}
+
+	i := 0
+	for i < len(b) {
+		state, action := parser.Table.Transition(pstate, b[i])
+		if state == parser.Utf8State { //nolint:nestif
+			var width int
+			cluster, _, width, _ = uniseg.FirstGraphemeCluster(b[i:], -1)
+			if m == WcWidth {
+				width = runewidth.StringWidth(string(cluster))
+			}
+			i += len(cluster)
+
+			r, _ := utf8.DecodeRune(cluster)
+			switch {
+			case r != utf8.RuneError && unicode.IsSpace(r) && r != nbsp: // nbsp is a non-breaking space
+				addWord()
+				space.WriteRune(r)
+				spaceWidth += width
+			case bytes.ContainsAny(cluster, breakpoints):
+				addSpace()
+				if curWidth+wordLen+width > limit {
+					word.Write(cluster)
+					wordLen += width
+				} else {
+					addWord()
+					buf.Write(cluster)
+					curWidth += width
+				}
+			default:
+				if wordLen+width > limit {
+					// Hardwrap the word if it's too long
+					addWord()
+				}
+
+				word.Write(cluster)
+				wordLen += width
+
+				if curWidth+wordLen+spaceWidth > limit {
+					addNewline()
+				}
+			}
+
+			pstate = parser.GroundState
+			continue
+		}
+
+		switch action {
+		case parser.PrintAction, parser.ExecuteAction:
+			switch r := rune(b[i]); {
+			case r == '\n':
+				if wordLen == 0 {
+					if curWidth+spaceWidth > limit {
+						curWidth = 0
+					} else {
+						// preserve whitespaces
+						buf.Write(space.Bytes())
+					}
+					space.Reset()
+					spaceWidth = 0
+				}
+
+				addWord()
+				addNewline()
+			case unicode.IsSpace(r):
+				addWord()
+				space.WriteRune(r)
+				spaceWidth++
+			case r == '-':
+				fallthrough
+			case runeContainsAny(r, breakpoints):
+				addSpace()
+				if curWidth+wordLen >= limit {
+					// We can't fit the breakpoint in the current line, treat
+					// it as part of the word.
+					word.WriteRune(r)
+					wordLen++
+				} else {
+					addWord()
+					buf.WriteRune(r)
+					curWidth++
+				}
+			default:
+				if curWidth == limit {
+					addNewline()
+				}
+				word.WriteRune(r)
+				wordLen++
+
+				if wordLen == limit {
+					// Hardwrap the word if it's too long
+					addWord()
+				}
+
+				if curWidth+wordLen+spaceWidth > limit {
+					addNewline()
+				}
+			}
+
+		default:
+			word.WriteByte(b[i])
+		}
+
+		// We manage the UTF8 state separately manually above.
+		if pstate != parser.Utf8State {
+			pstate = state
+		}
+		i++
+	}
+
+	if wordLen == 0 {
+		if curWidth+spaceWidth > limit {
+			curWidth = 0
+		} else {
+			// preserve whitespaces
+			buf.Write(space.Bytes())
+		}
+		space.Reset()
+		spaceWidth = 0
+	}
+
+	addWord()
+
+	return buf.String()
+}
+
+func runeContainsAny(r rune, s string) bool {
+	for _, c := range s {
+		if c == r {
+			return true
+		}
+	}
+	return false
+}

vendor/github.com/charmbracelet/x/ansi/xterm.go

@@ -0,0 +1,138 @@
+package ansi
+
+import "strconv"
+
+// KeyModifierOptions (XTMODKEYS) sets/resets xterm key modifier options.
+//
+// Default is 0.
+//
+//	CSI > Pp m
+//	CSI > Pp ; Pv m
+//
+// If Pv is omitted, the resource is reset to its initial value.
+//
+// See: https://invisible-island.net/xterm/ctlseqs/ctlseqs.html#h3-Functions-using-CSI-_-ordered-by-the-final-character_s_
+func KeyModifierOptions(p int, vs ...int) string {
+	var pp, pv string
+	if p > 0 {
+		pp = strconv.Itoa(p)
+	}
+
+	if len(vs) == 0 {
+		return "\x1b[>" + strconv.Itoa(p) + "m"
+	}
+
+	v := vs[0]
+	if v > 0 {
+		pv = strconv.Itoa(v)
+		return "\x1b[>" + pp + ";" + pv + "m"
+	}
+
+	return "\x1b[>" + pp + "m"
+}
+
+// XTMODKEYS is an alias for [KeyModifierOptions].
+func XTMODKEYS(p int, vs ...int) string {
+	return KeyModifierOptions(p, vs...)
+}
+
+// SetKeyModifierOptions sets xterm key modifier options.
+// This is an alias for [KeyModifierOptions].
+func SetKeyModifierOptions(pp int, pv int) string {
+	return KeyModifierOptions(pp, pv)
+}
+
+// ResetKeyModifierOptions resets xterm key modifier options.
+// This is an alias for [KeyModifierOptions].
+func ResetKeyModifierOptions(pp int) string {
+	return KeyModifierOptions(pp)
+}
+
+// QueryKeyModifierOptions (XTQMODKEYS) requests xterm key modifier options.
+//
+// Default is 0.
+//
+//	CSI ? Pp m
+//
+// See: https://invisible-island.net/xterm/ctlseqs/ctlseqs.html#h3-Functions-using-CSI-_-ordered-by-the-final-character_s_
+func QueryKeyModifierOptions(pp int) string {
+	var p string
+	if pp > 0 {
+		p = strconv.Itoa(pp)
+	}
+	return "\x1b[?" + p + "m"
+}
+
+// XTQMODKEYS is an alias for [QueryKeyModifierOptions].
+func XTQMODKEYS(pp int) string {
+	return QueryKeyModifierOptions(pp)
+}
+
+// Modify Other Keys (modifyOtherKeys) is an xterm feature that allows the
+// terminal to modify the behavior of certain keys to send different escape
+// sequences when pressed.
+//
+// See: https://invisible-island.net/xterm/manpage/xterm.html#VT100-Widget-Resources:modifyOtherKeys
+const (
+	SetModifyOtherKeys1  = "\x1b[>4;1m"
+	SetModifyOtherKeys2  = "\x1b[>4;2m"
+	ResetModifyOtherKeys = "\x1b[>4m"
+	QueryModifyOtherKeys = "\x1b[?4m"
+)
+
+// ModifyOtherKeys returns a sequence that sets XTerm modifyOtherKeys mode.
+// The mode argument specifies the mode to set.
+//
+//	0: Disable modifyOtherKeys mode.
+//	1: Enable modifyOtherKeys mode 1.
+//	2: Enable modifyOtherKeys mode 2.
+//
+//	CSI > 4 ; mode m
+//
+// See: https://invisible-island.net/xterm/ctlseqs/ctlseqs.html#h3-Functions-using-CSI-_-ordered-by-the-final-character_s_
+// See: https://invisible-island.net/xterm/manpage/xterm.html#VT100-Widget-Resources:modifyOtherKeys
+//
+// Deprecated: use [SetModifyOtherKeys1] or [SetModifyOtherKeys2] instead.
+func ModifyOtherKeys(mode int) string {
+	return "\x1b[>4;" + strconv.Itoa(mode) + "m"
+}
+
+// DisableModifyOtherKeys disables the modifyOtherKeys mode.
+//
+//	CSI > 4 ; 0 m
+//
+// See: https://invisible-island.net/xterm/ctlseqs/ctlseqs.html#h3-Functions-using-CSI-_-ordered-by-the-final-character_s_
+// See: https://invisible-island.net/xterm/manpage/xterm.html#VT100-Widget-Resources:modifyOtherKeys
+//
+// Deprecated: use [ResetModifyOtherKeys] instead.
+const DisableModifyOtherKeys = "\x1b[>4;0m"
+
+// EnableModifyOtherKeys1 enables the modifyOtherKeys mode 1.
+//
+//	CSI > 4 ; 1 m
+//
+// See: https://invisible-island.net/xterm/ctlseqs/ctlseqs.html#h3-Functions-using-CSI-_-ordered-by-the-final-character_s_
+// See: https://invisible-island.net/xterm/manpage/xterm.html#VT100-Widget-Resources:modifyOtherKeys
+//
+// Deprecated: use [SetModifyOtherKeys1] instead.
+const EnableModifyOtherKeys1 = "\x1b[>4;1m"
+
+// EnableModifyOtherKeys2 enables the modifyOtherKeys mode 2.
+//
+//	CSI > 4 ; 2 m
+//
+// See: https://invisible-island.net/xterm/ctlseqs/ctlseqs.html#h3-Functions-using-CSI-_-ordered-by-the-final-character_s_
+// See: https://invisible-island.net/xterm/manpage/xterm.html#VT100-Widget-Resources:modifyOtherKeys
+//
+// Deprecated: use [SetModifyOtherKeys2] instead.
+const EnableModifyOtherKeys2 = "\x1b[>4;2m"
+
+// RequestModifyOtherKeys requests the modifyOtherKeys mode.
+//
+//	CSI ? 4  m
+//
+// See: https://invisible-island.net/xterm/ctlseqs/ctlseqs.html#h3-Functions-using-CSI-_-ordered-by-the-final-character_s_
+// See: https://invisible-island.net/xterm/manpage/xterm.html#VT100-Widget-Resources:modifyOtherKeys
+//
+// Deprecated: use [QueryModifyOtherKeys] instead.
+const RequestModifyOtherKeys = "\x1b[?4m"

vendor/github.com/charmbracelet/x/cellbuf/LICENSE

@@ -0,0 +1,21 @@
+MIT License
+
+Copyright (c) 2023 Charmbracelet, Inc.
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.

vendor/github.com/charmbracelet/x/cellbuf/buffer.go

@@ -0,0 +1,473 @@
+package cellbuf
+
+import (
+	"strings"
+
+	"github.com/mattn/go-runewidth"
+	"github.com/rivo/uniseg"
+)
+
+// NewCell returns a new cell. This is a convenience function that initializes a
+// new cell with the given content. The cell's width is determined by the
+// content using [runewidth.RuneWidth].
+// This will only account for the first combined rune in the content. If the
+// content is empty, it will return an empty cell with a width of 0.
+func NewCell(r rune, comb ...rune) (c *Cell) {
+	c = new(Cell)
+	c.Rune = r
+	c.Width = runewidth.RuneWidth(r)
+	for _, r := range comb {
+		if runewidth.RuneWidth(r) > 0 {
+			break
+		}
+		c.Comb = append(c.Comb, r)
+	}
+	c.Comb = comb
+	c.Width = runewidth.StringWidth(string(append([]rune{r}, comb...)))
+	return
+}
+
+// NewCellString returns a new cell with the given string content. This is a
+// convenience function that initializes a new cell with the given content. The
+// cell's width is determined by the content using [runewidth.StringWidth].
+// This will only use the first combined rune in the string. If the string is
+// empty, it will return an empty cell with a width of 0.
+func NewCellString(s string) (c *Cell) {
+	c = new(Cell)
+	for i, r := range s {
+		if i == 0 {
+			c.Rune = r
+			// We only care about the first rune's width
+			c.Width = runewidth.RuneWidth(r)
+		} else {
+			if runewidth.RuneWidth(r) > 0 {
+				break
+			}
+			c.Comb = append(c.Comb, r)
+		}
+	}
+	return
+}
+
+// NewGraphemeCell returns a new cell. This is a convenience function that
+// initializes a new cell with the given content. The cell's width is determined
+// by the content using [uniseg.FirstGraphemeClusterInString].
+// This is used when the content is a grapheme cluster i.e. a sequence of runes
+// that form a single visual unit.
+// This will only return the first grapheme cluster in the string. If the
+// string is empty, it will return an empty cell with a width of 0.
+func NewGraphemeCell(s string) (c *Cell) {
+	g, _, w, _ := uniseg.FirstGraphemeClusterInString(s, -1)
+	return newGraphemeCell(g, w)
+}
+
+func newGraphemeCell(s string, w int) (c *Cell) {
+	c = new(Cell)
+	c.Width = w
+	for i, r := range s {
+		if i == 0 {
+			c.Rune = r
+		} else {
+			c.Comb = append(c.Comb, r)
+		}
+	}
+	return
+}
+
+// Line represents a line in the terminal.
+// A nil cell represents an blank cell, a cell with a space character and a
+// width of 1.
+// If a cell has no content and a width of 0, it is a placeholder for a wide
+// cell.
+type Line []*Cell
+
+// Width returns the width of the line.
+func (l Line) Width() int {
+	return len(l)
+}
+
+// Len returns the length of the line.
+func (l Line) Len() int {
+	return len(l)
+}
+
+// String returns the string representation of the line. Any trailing spaces
+// are removed.
+func (l Line) String() (s string) {
+	for _, c := range l {
+		if c == nil {
+			s += " "
+		} else if c.Empty() {
+			continue
+		} else {
+			s += c.String()
+		}
+	}
+	s = strings.TrimRight(s, " ")
+	return
+}
+
+// At returns the cell at the given x position.
+// If the cell does not exist, it returns nil.
+func (l Line) At(x int) *Cell {
+	if x < 0 || x >= len(l) {
+		return nil
+	}
+
+	c := l[x]
+	if c == nil {
+		newCell := BlankCell
+		return &newCell
+	}
+
+	return c
+}
+
+// Set sets the cell at the given x position. If a wide cell is given, it will
+// set the cell and the following cells to [EmptyCell]. It returns true if the
+// cell was set.
+func (l Line) Set(x int, c *Cell) bool {
+	return l.set(x, c, true)
+}
+
+func (l Line) set(x int, c *Cell, clone bool) bool {
+	width := l.Width()
+	if x < 0 || x >= width {
+		return false
+	}
+
+	// When a wide cell is partially overwritten, we need
+	// to fill the rest of the cell with space cells to
+	// avoid rendering issues.
+	prev := l.At(x)
+	if prev != nil && prev.Width > 1 {
+		// Writing to the first wide cell
+		for j := 0; j < prev.Width && x+j < l.Width(); j++ {
+			l[x+j] = prev.Clone().Blank()
+		}
+	} else if prev != nil && prev.Width == 0 {
+		// Writing to wide cell placeholders
+		for j := 1; j < maxCellWidth && x-j >= 0; j++ {
+			wide := l.At(x - j)
+			if wide != nil && wide.Width > 1 && j < wide.Width {
+				for k := 0; k < wide.Width; k++ {
+					l[x-j+k] = wide.Clone().Blank()
+				}
+				break
+			}
+		}
+	}
+
+	if clone && c != nil {
+		// Clone the cell if not nil.
+		c = c.Clone()
+	}
+
+	if c != nil && x+c.Width > width {
+		// If the cell is too wide, we write blanks with the same style.
+		for i := 0; i < c.Width && x+i < width; i++ {
+			l[x+i] = c.Clone().Blank()
+		}
+	} else {
+		l[x] = c
+
+		// Mark wide cells with an empty cell zero width
+		// We set the wide cell down below
+		if c != nil && c.Width > 1 {
+			for j := 1; j < c.Width && x+j < l.Width(); j++ {
+				var wide Cell
+				l[x+j] = &wide
+			}
+		}
+	}
+
+	return true
+}
+
+// Buffer is a 2D grid of cells representing a screen or terminal.
+type Buffer struct {
+	// Lines holds the lines of the buffer.
+	Lines []Line
+}
+
+// NewBuffer creates a new buffer with the given width and height.
+// This is a convenience function that initializes a new buffer and resizes it.
+func NewBuffer(width int, height int) *Buffer {
+	b := new(Buffer)
+	b.Resize(width, height)
+	return b
+}
+
+// String returns the string representation of the buffer.
+func (b *Buffer) String() (s string) {
+	for i, l := range b.Lines {
+		s += l.String()
+		if i < len(b.Lines)-1 {
+			s += "\r\n"
+		}
+	}
+	return
+}
+
+// Line returns a pointer to the line at the given y position.
+// If the line does not exist, it returns nil.
+func (b *Buffer) Line(y int) Line {
+	if y < 0 || y >= len(b.Lines) {
+		return nil
+	}
+	return b.Lines[y]
+}
+
+// Cell implements Screen.
+func (b *Buffer) Cell(x int, y int) *Cell {
+	if y < 0 || y >= len(b.Lines) {
+		return nil
+	}
+	return b.Lines[y].At(x)
+}
+
+// maxCellWidth is the maximum width a terminal cell can get.
+const maxCellWidth = 4
+
+// SetCell sets the cell at the given x, y position.
+func (b *Buffer) SetCell(x, y int, c *Cell) bool {
+	return b.setCell(x, y, c, true)
+}
+
+// setCell sets the cell at the given x, y position. This will always clone and
+// allocates a new cell if c is not nil.
+func (b *Buffer) setCell(x, y int, c *Cell, clone bool) bool {
+	if y < 0 || y >= len(b.Lines) {
+		return false
+	}
+	return b.Lines[y].set(x, c, clone)
+}
+
+// Height implements Screen.
+func (b *Buffer) Height() int {
+	return len(b.Lines)
+}
+
+// Width implements Screen.
+func (b *Buffer) Width() int {
+	if len(b.Lines) == 0 {
+		return 0
+	}
+	return b.Lines[0].Width()
+}
+
+// Bounds returns the bounds of the buffer.
+func (b *Buffer) Bounds() Rectangle {
+	return Rect(0, 0, b.Width(), b.Height())
+}
+
+// Resize resizes the buffer to the given width and height.
+func (b *Buffer) Resize(width int, height int) {
+	if width == 0 || height == 0 {
+		b.Lines = nil
+		return
+	}
+
+	if width > b.Width() {
+		line := make(Line, width-b.Width())
+		for i := range b.Lines {
+			b.Lines[i] = append(b.Lines[i], line...)
+		}
+	} else if width < b.Width() {
+		for i := range b.Lines {
+			b.Lines[i] = b.Lines[i][:width]
+		}
+	}
+
+	if height > len(b.Lines) {
+		for i := len(b.Lines); i < height; i++ {
+			b.Lines = append(b.Lines, make(Line, width))
+		}
+	} else if height < len(b.Lines) {
+		b.Lines = b.Lines[:height]
+	}
+}
+
+// FillRect fills the buffer with the given cell and rectangle.
+func (b *Buffer) FillRect(c *Cell, rect Rectangle) {
+	cellWidth := 1
+	if c != nil && c.Width > 1 {
+		cellWidth = c.Width
+	}
+	for y := rect.Min.Y; y < rect.Max.Y; y++ {
+		for x := rect.Min.X; x < rect.Max.X; x += cellWidth {
+			b.setCell(x, y, c, false) //nolint:errcheck
+		}
+	}
+}
+
+// Fill fills the buffer with the given cell and rectangle.
+func (b *Buffer) Fill(c *Cell) {
+	b.FillRect(c, b.Bounds())
+}
+
+// Clear clears the buffer with space cells and rectangle.
+func (b *Buffer) Clear() {
+	b.ClearRect(b.Bounds())
+}
+
+// ClearRect clears the buffer with space cells within the specified
+// rectangles. Only cells within the rectangle's bounds are affected.
+func (b *Buffer) ClearRect(rect Rectangle) {
+	b.FillRect(nil, rect)
+}
+
+// InsertLine inserts n lines at the given line position, with the given
+// optional cell, within the specified rectangles. If no rectangles are
+// specified, it inserts lines in the entire buffer. Only cells within the
+// rectangle's horizontal bounds are affected. Lines are pushed out of the
+// rectangle bounds and lost. This follows terminal [ansi.IL] behavior.
+// It returns the pushed out lines.
+func (b *Buffer) InsertLine(y, n int, c *Cell) {
+	b.InsertLineRect(y, n, c, b.Bounds())
+}
+
+// InsertLineRect inserts new lines at the given line position, with the
+// given optional cell, within the rectangle bounds. Only cells within the
+// rectangle's horizontal bounds are affected. Lines are pushed out of the
+// rectangle bounds and lost. This follows terminal [ansi.IL] behavior.
+func (b *Buffer) InsertLineRect(y, n int, c *Cell, rect Rectangle) {
+	if n <= 0 || y < rect.Min.Y || y >= rect.Max.Y || y >= b.Height() {
+		return
+	}
+
+	// Limit number of lines to insert to available space
+	if y+n > rect.Max.Y {
+		n = rect.Max.Y - y
+	}
+
+	// Move existing lines down within the bounds
+	for i := rect.Max.Y - 1; i >= y+n; i-- {
+		for x := rect.Min.X; x < rect.Max.X; x++ {
+			// We don't need to clone c here because we're just moving lines down.
+			b.setCell(x, i, b.Lines[i-n][x], false)
+		}
+	}
+
+	// Clear the newly inserted lines within bounds
+	for i := y; i < y+n; i++ {
+		for x := rect.Min.X; x < rect.Max.X; x++ {
+			b.setCell(x, i, c, true)
+		}
+	}
+}
+
+// DeleteLineRect deletes lines at the given line position, with the given
+// optional cell, within the rectangle bounds. Only cells within the
+// rectangle's bounds are affected. Lines are shifted up within the bounds and
+// new blank lines are created at the bottom. This follows terminal [ansi.DL]
+// behavior.
+func (b *Buffer) DeleteLineRect(y, n int, c *Cell, rect Rectangle) {
+	if n <= 0 || y < rect.Min.Y || y >= rect.Max.Y || y >= b.Height() {
+		return
+	}
+
+	// Limit deletion count to available space in scroll region
+	if n > rect.Max.Y-y {
+		n = rect.Max.Y - y
+	}
+
+	// Shift cells up within the bounds
+	for dst := y; dst < rect.Max.Y-n; dst++ {
+		src := dst + n
+		for x := rect.Min.X; x < rect.Max.X; x++ {
+			// We don't need to clone c here because we're just moving cells up.
+			// b.lines[dst][x] = b.lines[src][x]
+			b.setCell(x, dst, b.Lines[src][x], false)
+		}
+	}
+
+	// Fill the bottom n lines with blank cells
+	for i := rect.Max.Y - n; i < rect.Max.Y; i++ {
+		for x := rect.Min.X; x < rect.Max.X; x++ {
+			b.setCell(x, i, c, true)
+		}
+	}
+}
+
+// DeleteLine deletes n lines at the given line position, with the given
+// optional cell, within the specified rectangles. If no rectangles are
+// specified, it deletes lines in the entire buffer.
+func (b *Buffer) DeleteLine(y, n int, c *Cell) {
+	b.DeleteLineRect(y, n, c, b.Bounds())
+}
+
+// InsertCell inserts new cells at the given position, with the given optional
+// cell, within the specified rectangles. If no rectangles are specified, it
+// inserts cells in the entire buffer. This follows terminal [ansi.ICH]
+// behavior.
+func (b *Buffer) InsertCell(x, y, n int, c *Cell) {
+	b.InsertCellRect(x, y, n, c, b.Bounds())
+}
+
+// InsertCellRect inserts new cells at the given position, with the given
+// optional cell, within the rectangle bounds. Only cells within the
+// rectangle's bounds are affected, following terminal [ansi.ICH] behavior.
+func (b *Buffer) InsertCellRect(x, y, n int, c *Cell, rect Rectangle) {
+	if n <= 0 || y < rect.Min.Y || y >= rect.Max.Y || y >= b.Height() ||
+		x < rect.Min.X || x >= rect.Max.X || x >= b.Width() {
+		return
+	}
+
+	// Limit number of cells to insert to available space
+	if x+n > rect.Max.X {
+		n = rect.Max.X - x
+	}
+
+	// Move existing cells within rectangle bounds to the right
+	for i := rect.Max.X - 1; i >= x+n && i-n >= rect.Min.X; i-- {
+		// We don't need to clone c here because we're just moving cells to the
+		// right.
+		// b.lines[y][i] = b.lines[y][i-n]
+		b.setCell(i, y, b.Lines[y][i-n], false)
+	}
+
+	// Clear the newly inserted cells within rectangle bounds
+	for i := x; i < x+n && i < rect.Max.X; i++ {
+		b.setCell(i, y, c, true)
+	}
+}
+
+// DeleteCell deletes cells at the given position, with the given optional
+// cell, within the specified rectangles. If no rectangles are specified, it
+// deletes cells in the entire buffer. This follows terminal [ansi.DCH]
+// behavior.
+func (b *Buffer) DeleteCell(x, y, n int, c *Cell) {
+	b.DeleteCellRect(x, y, n, c, b.Bounds())
+}
+
+// DeleteCellRect deletes cells at the given position, with the given
+// optional cell, within the rectangle bounds. Only cells within the
+// rectangle's bounds are affected, following terminal [ansi.DCH] behavior.
+func (b *Buffer) DeleteCellRect(x, y, n int, c *Cell, rect Rectangle) {
+	if n <= 0 || y < rect.Min.Y || y >= rect.Max.Y || y >= b.Height() ||
+		x < rect.Min.X || x >= rect.Max.X || x >= b.Width() {
+		return
+	}
+
+	// Calculate how many positions we can actually delete
+	remainingCells := rect.Max.X - x
+	if n > remainingCells {
+		n = remainingCells
+	}
+
+	// Shift the remaining cells to the left
+	for i := x; i < rect.Max.X-n; i++ {
+		if i+n < rect.Max.X {
+			// We don't need to clone c here because we're just moving cells to
+			// the left.
+			// b.lines[y][i] = b.lines[y][i+n]
+			b.setCell(i, y, b.Lines[y][i+n], false)
+		}
+	}
+
+	// Fill the vacated positions with the given cell
+	for i := rect.Max.X - n; i < rect.Max.X; i++ {
+		b.setCell(i, y, c, true)
+	}
+}

vendor/github.com/charmbracelet/x/cellbuf/cell.go

@@ -0,0 +1,503 @@
+package cellbuf
+
+import (
+	"github.com/charmbracelet/x/ansi"
+)
+
+var (
+	// BlankCell is a cell with a single space, width of 1, and no style or link.
+	BlankCell = Cell{Rune: ' ', Width: 1}
+
+	// EmptyCell is just an empty cell used for comparisons and as a placeholder
+	// for wide cells.
+	EmptyCell = Cell{}
+)
+
+// Cell represents a single cell in the terminal screen.
+type Cell struct {
+	// The style of the cell. Nil style means no style. Zero value prints a
+	// reset sequence.
+	Style Style
+
+	// Link is the hyperlink of the cell.
+	Link Link
+
+	// Comb is the combining runes of the cell. This is nil if the cell is a
+	// single rune or if it's a zero width cell that is part of a wider cell.
+	Comb []rune
+
+	// Width is the mono-space width of the grapheme cluster.
+	Width int
+
+	// Rune is the main rune of the cell. This is zero if the cell is part of a
+	// wider cell.
+	Rune rune
+}
+
+// Append appends runes to the cell without changing the width. This is useful
+// when we want to use the cell to store escape sequences or other runes that
+// don't affect the width of the cell.
+func (c *Cell) Append(r ...rune) {
+	for i, r := range r {
+		if i == 0 && c.Rune == 0 {
+			c.Rune = r
+			continue
+		}
+		c.Comb = append(c.Comb, r)
+	}
+}
+
+// String returns the string content of the cell excluding any styles, links,
+// and escape sequences.
+func (c Cell) String() string {
+	if c.Rune == 0 {
+		return ""
+	}
+	if len(c.Comb) == 0 {
+		return string(c.Rune)
+	}
+	return string(append([]rune{c.Rune}, c.Comb...))
+}
+
+// Equal returns whether the cell is equal to the other cell.
+func (c *Cell) Equal(o *Cell) bool {
+	return o != nil &&
+		c.Width == o.Width &&
+		c.Rune == o.Rune &&
+		runesEqual(c.Comb, o.Comb) &&
+		c.Style.Equal(&o.Style) &&
+		c.Link.Equal(&o.Link)
+}
+
+// Empty returns whether the cell is an empty cell. An empty cell is a cell
+// with a width of 0, a rune of 0, and no combining runes.
+func (c Cell) Empty() bool {
+	return c.Width == 0 &&
+		c.Rune == 0 &&
+		len(c.Comb) == 0
+}
+
+// Reset resets the cell to the default state zero value.
+func (c *Cell) Reset() {
+	c.Rune = 0
+	c.Comb = nil
+	c.Width = 0
+	c.Style.Reset()
+	c.Link.Reset()
+}
+
+// Clear returns whether the cell consists of only attributes that don't
+// affect appearance of a space character.
+func (c *Cell) Clear() bool {
+	return c.Rune == ' ' && len(c.Comb) == 0 && c.Width == 1 && c.Style.Clear() && c.Link.Empty()
+}
+
+// Clone returns a copy of the cell.
+func (c *Cell) Clone() (n *Cell) {
+	n = new(Cell)
+	*n = *c
+	return
+}
+
+// Blank makes the cell a blank cell by setting the rune to a space, comb to
+// nil, and the width to 1.
+func (c *Cell) Blank() *Cell {
+	c.Rune = ' '
+	c.Comb = nil
+	c.Width = 1
+	return c
+}
+
+// Link represents a hyperlink in the terminal screen.
+type Link struct {
+	URL    string
+	Params string
+}
+
+// String returns a string representation of the hyperlink.
+func (h Link) String() string {
+	return h.URL
+}
+
+// Reset resets the hyperlink to the default state zero value.
+func (h *Link) Reset() {
+	h.URL = ""
+	h.Params = ""
+}
+
+// Equal returns whether the hyperlink is equal to the other hyperlink.
+func (h *Link) Equal(o *Link) bool {
+	return o != nil && h.URL == o.URL && h.Params == o.Params
+}
+
+// Empty returns whether the hyperlink is empty.
+func (h Link) Empty() bool {
+	return h.URL == "" && h.Params == ""
+}
+
+// AttrMask is a bitmask for text attributes that can change the look of text.
+// These attributes can be combined to create different styles.
+type AttrMask uint8
+
+// These are the available text attributes that can be combined to create
+// different styles.
+const (
+	BoldAttr AttrMask = 1 << iota
+	FaintAttr
+	ItalicAttr
+	SlowBlinkAttr
+	RapidBlinkAttr
+	ReverseAttr
+	ConcealAttr
+	StrikethroughAttr
+
+	ResetAttr AttrMask = 0
+)
+
+// UnderlineStyle is the style of underline to use for text.
+type UnderlineStyle = ansi.UnderlineStyle
+
+// These are the available underline styles.
+const (
+	NoUnderline     = ansi.NoUnderlineStyle
+	SingleUnderline = ansi.SingleUnderlineStyle
+	DoubleUnderline = ansi.DoubleUnderlineStyle
+	CurlyUnderline  = ansi.CurlyUnderlineStyle
+	DottedUnderline = ansi.DottedUnderlineStyle
+	DashedUnderline = ansi.DashedUnderlineStyle
+)
+
+// Style represents the Style of a cell.
+type Style struct {
+	Fg      ansi.Color
+	Bg      ansi.Color
+	Ul      ansi.Color
+	Attrs   AttrMask
+	UlStyle UnderlineStyle
+}
+
+// Sequence returns the ANSI sequence that sets the style.
+func (s Style) Sequence() string {
+	if s.Empty() {
+		return ansi.ResetStyle
+	}
+
+	var b ansi.Style
+
+	if s.Attrs != 0 {
+		if s.Attrs&BoldAttr != 0 {
+			b = b.Bold()
+		}
+		if s.Attrs&FaintAttr != 0 {
+			b = b.Faint()
+		}
+		if s.Attrs&ItalicAttr != 0 {
+			b = b.Italic()
+		}
+		if s.Attrs&SlowBlinkAttr != 0 {
+			b = b.SlowBlink()
+		}
+		if s.Attrs&RapidBlinkAttr != 0 {
+			b = b.RapidBlink()
+		}
+		if s.Attrs&ReverseAttr != 0 {
+			b = b.Reverse()
+		}
+		if s.Attrs&ConcealAttr != 0 {
+			b = b.Conceal()
+		}
+		if s.Attrs&StrikethroughAttr != 0 {
+			b = b.Strikethrough()
+		}
+	}
+	if s.UlStyle != NoUnderline {
+		switch s.UlStyle {
+		case SingleUnderline:
+			b = b.Underline()
+		case DoubleUnderline:
+			b = b.DoubleUnderline()
+		case CurlyUnderline:
+			b = b.CurlyUnderline()
+		case DottedUnderline:
+			b = b.DottedUnderline()
+		case DashedUnderline:
+			b = b.DashedUnderline()
+		}
+	}
+	if s.Fg != nil {
+		b = b.ForegroundColor(s.Fg)
+	}
+	if s.Bg != nil {
+		b = b.BackgroundColor(s.Bg)
+	}
+	if s.Ul != nil {
+		b = b.UnderlineColor(s.Ul)
+	}
+
+	return b.String()
+}
+
+// DiffSequence returns the ANSI sequence that sets the style as a diff from
+// another style.
+func (s Style) DiffSequence(o Style) string {
+	if o.Empty() {
+		return s.Sequence()
+	}
+
+	var b ansi.Style
+
+	if !colorEqual(s.Fg, o.Fg) {
+		b = b.ForegroundColor(s.Fg)
+	}
+
+	if !colorEqual(s.Bg, o.Bg) {
+		b = b.BackgroundColor(s.Bg)
+	}
+
+	if !colorEqual(s.Ul, o.Ul) {
+		b = b.UnderlineColor(s.Ul)
+	}
+
+	var (
+		noBlink  bool
+		isNormal bool
+	)
+
+	if s.Attrs != o.Attrs {
+		if s.Attrs&BoldAttr != o.Attrs&BoldAttr {
+			if s.Attrs&BoldAttr != 0 {
+				b = b.Bold()
+			} else if !isNormal {
+				isNormal = true
+				b = b.NormalIntensity()
+			}
+		}
+		if s.Attrs&FaintAttr != o.Attrs&FaintAttr {
+			if s.Attrs&FaintAttr != 0 {
+				b = b.Faint()
+			} else if !isNormal {
+				b = b.NormalIntensity()
+			}
+		}
+		if s.Attrs&ItalicAttr != o.Attrs&ItalicAttr {
+			if s.Attrs&ItalicAttr != 0 {
+				b = b.Italic()
+			} else {
+				b = b.NoItalic()
+			}
+		}
+		if s.Attrs&SlowBlinkAttr != o.Attrs&SlowBlinkAttr {
+			if s.Attrs&SlowBlinkAttr != 0 {
+				b = b.SlowBlink()
+			} else if !noBlink {
+				noBlink = true
+				b = b.NoBlink()
+			}
+		}
+		if s.Attrs&RapidBlinkAttr != o.Attrs&RapidBlinkAttr {
+			if s.Attrs&RapidBlinkAttr != 0 {
+				b = b.RapidBlink()
+			} else if !noBlink {
+				b = b.NoBlink()
+			}
+		}
+		if s.Attrs&ReverseAttr != o.Attrs&ReverseAttr {
+			if s.Attrs&ReverseAttr != 0 {
+				b = b.Reverse()
+			} else {
+				b = b.NoReverse()
+			}
+		}
+		if s.Attrs&ConcealAttr != o.Attrs&ConcealAttr {
+			if s.Attrs&ConcealAttr != 0 {
+				b = b.Conceal()
+			} else {
+				b = b.NoConceal()
+			}
+		}
+		if s.Attrs&StrikethroughAttr != o.Attrs&StrikethroughAttr {
+			if s.Attrs&StrikethroughAttr != 0 {
+				b = b.Strikethrough()
+			} else {
+				b = b.NoStrikethrough()
+			}
+		}
+	}
+
+	if s.UlStyle != o.UlStyle {
+		b = b.UnderlineStyle(s.UlStyle)
+	}
+
+	return b.String()
+}
+
+// Equal returns true if the style is equal to the other style.
+func (s *Style) Equal(o *Style) bool {
+	return s.Attrs == o.Attrs &&
+		s.UlStyle == o.UlStyle &&
+		colorEqual(s.Fg, o.Fg) &&
+		colorEqual(s.Bg, o.Bg) &&
+		colorEqual(s.Ul, o.Ul)
+}
+
+func colorEqual(c, o ansi.Color) bool {
+	if c == nil && o == nil {
+		return true
+	}
+	if c == nil || o == nil {
+		return false
+	}
+	cr, cg, cb, ca := c.RGBA()
+	or, og, ob, oa := o.RGBA()
+	return cr == or && cg == og && cb == ob && ca == oa
+}
+
+// Bold sets the bold attribute.
+func (s *Style) Bold(v bool) *Style {
+	if v {
+		s.Attrs |= BoldAttr
+	} else {
+		s.Attrs &^= BoldAttr
+	}
+	return s
+}
+
+// Faint sets the faint attribute.
+func (s *Style) Faint(v bool) *Style {
+	if v {
+		s.Attrs |= FaintAttr
+	} else {
+		s.Attrs &^= FaintAttr
+	}
+	return s
+}
+
+// Italic sets the italic attribute.
+func (s *Style) Italic(v bool) *Style {
+	if v {
+		s.Attrs |= ItalicAttr
+	} else {
+		s.Attrs &^= ItalicAttr
+	}
+	return s
+}
+
+// SlowBlink sets the slow blink attribute.
+func (s *Style) SlowBlink(v bool) *Style {
+	if v {
+		s.Attrs |= SlowBlinkAttr
+	} else {
+		s.Attrs &^= SlowBlinkAttr
+	}
+	return s
+}
+
+// RapidBlink sets the rapid blink attribute.
+func (s *Style) RapidBlink(v bool) *Style {
+	if v {
+		s.Attrs |= RapidBlinkAttr
+	} else {
+		s.Attrs &^= RapidBlinkAttr
+	}
+	return s
+}
+
+// Reverse sets the reverse attribute.
+func (s *Style) Reverse(v bool) *Style {
+	if v {
+		s.Attrs |= ReverseAttr
+	} else {
+		s.Attrs &^= ReverseAttr
+	}
+	return s
+}
+
+// Conceal sets the conceal attribute.
+func (s *Style) Conceal(v bool) *Style {
+	if v {
+		s.Attrs |= ConcealAttr
+	} else {
+		s.Attrs &^= ConcealAttr
+	}
+	return s
+}
+
+// Strikethrough sets the strikethrough attribute.
+func (s *Style) Strikethrough(v bool) *Style {
+	if v {
+		s.Attrs |= StrikethroughAttr
+	} else {
+		s.Attrs &^= StrikethroughAttr
+	}
+	return s
+}
+
+// UnderlineStyle sets the underline style.
+func (s *Style) UnderlineStyle(style UnderlineStyle) *Style {
+	s.UlStyle = style
+	return s
+}
+
+// Underline sets the underline attribute.
+// This is a syntactic sugar for [UnderlineStyle].
+func (s *Style) Underline(v bool) *Style {
+	if v {
+		return s.UnderlineStyle(SingleUnderline)
+	}
+	return s.UnderlineStyle(NoUnderline)
+}
+
+// Foreground sets the foreground color.
+func (s *Style) Foreground(c ansi.Color) *Style {
+	s.Fg = c
+	return s
+}
+
+// Background sets the background color.
+func (s *Style) Background(c ansi.Color) *Style {
+	s.Bg = c
+	return s
+}
+
+// UnderlineColor sets the underline color.
+func (s *Style) UnderlineColor(c ansi.Color) *Style {
+	s.Ul = c
+	return s
+}
+
+// Reset resets the style to default.
+func (s *Style) Reset() *Style {
+	s.Fg = nil
+	s.Bg = nil
+	s.Ul = nil
+	s.Attrs = ResetAttr
+	s.UlStyle = NoUnderline
+	return s
+}
+
+// Empty returns true if the style is empty.
+func (s *Style) Empty() bool {
+	return s.Fg == nil && s.Bg == nil && s.Ul == nil && s.Attrs == ResetAttr && s.UlStyle == NoUnderline
+}
+
+// Clear returns whether the style consists of only attributes that don't
+// affect appearance of a space character.
+func (s *Style) Clear() bool {
+	return s.UlStyle == NoUnderline &&
+		s.Attrs&^(BoldAttr|FaintAttr|ItalicAttr|SlowBlinkAttr|RapidBlinkAttr) == 0 &&
+		s.Fg == nil &&
+		s.Bg == nil &&
+		s.Ul == nil
+}
+
+func runesEqual(a, b []rune) bool {
+	if len(a) != len(b) {
+		return false
+	}
+	for i, r := range a {
+		if r != b[i] {
+			return false
+		}
+	}
+	return true
+}

vendor/github.com/charmbracelet/x/cellbuf/errors.go

@@ -0,0 +1,6 @@
+package cellbuf
+
+import "errors"
+
+// ErrOutOfBounds is returned when the given x, y position is out of bounds.
+var ErrOutOfBounds = errors.New("out of bounds")

vendor/github.com/charmbracelet/x/cellbuf/geom.go

@@ -0,0 +1,21 @@
+package cellbuf
+
+import (
+	"image"
+)
+
+// Position represents an x, y position.
+type Position = image.Point
+
+// Pos is a shorthand for Position{X: x, Y: y}.
+func Pos(x, y int) Position {
+	return image.Pt(x, y)
+}
+
+// Rectange represents a rectangle.
+type Rectangle = image.Rectangle
+
+// Rect is a shorthand for Rectangle.
+func Rect(x, y, w, h int) Rectangle {
+	return image.Rect(x, y, x+w, y+h)
+}

vendor/github.com/charmbracelet/x/cellbuf/hardscroll.go

@@ -0,0 +1,272 @@
+package cellbuf
+
+import (
+	"strings"
+
+	"github.com/charmbracelet/x/ansi"
+)
+
+// scrollOptimize optimizes the screen to transform the old buffer into the new
+// buffer.
+func (s *Screen) scrollOptimize() {
+	height := s.newbuf.Height()
+	if s.oldnum == nil || len(s.oldnum) < height {
+		s.oldnum = make([]int, height)
+	}
+
+	// Calculate the indices
+	s.updateHashmap()
+	if len(s.hashtab) < height {
+		return
+	}
+
+	// Pass 1 - from top to bottom scrolling up
+	for i := 0; i < height; {
+		for i < height && (s.oldnum[i] == newIndex || s.oldnum[i] <= i) {
+			i++
+		}
+		if i >= height {
+			break
+		}
+
+		shift := s.oldnum[i] - i // shift > 0
+		start := i
+
+		i++
+		for i < height && s.oldnum[i] != newIndex && s.oldnum[i]-i == shift {
+			i++
+		}
+		end := i - 1 + shift
+
+		if !s.scrolln(shift, start, end, height-1) {
+			continue
+		}
+	}
+
+	// Pass 2 - from bottom to top scrolling down
+	for i := height - 1; i >= 0; {
+		for i >= 0 && (s.oldnum[i] == newIndex || s.oldnum[i] >= i) {
+			i--
+		}
+		if i < 0 {
+			break
+		}
+
+		shift := s.oldnum[i] - i // shift < 0
+		end := i
+
+		i--
+		for i >= 0 && s.oldnum[i] != newIndex && s.oldnum[i]-i == shift {
+			i--
+		}
+
+		start := i + 1 - (-shift)
+		if !s.scrolln(shift, start, end, height-1) {
+			continue
+		}
+	}
+}
+
+// scrolln scrolls the screen up by n lines.
+func (s *Screen) scrolln(n, top, bot, maxY int) (v bool) { //nolint:unparam
+	const (
+		nonDestScrollRegion = false
+		memoryBelow         = false
+	)
+
+	blank := s.clearBlank()
+	if n > 0 {
+		// Scroll up (forward)
+		v = s.scrollUp(n, top, bot, 0, maxY, blank)
+		if !v {
+			s.buf.WriteString(ansi.SetTopBottomMargins(top+1, bot+1))
+
+			// XXX: How should we handle this in inline mode when not using alternate screen?
+			s.cur.X, s.cur.Y = -1, -1
+			v = s.scrollUp(n, top, bot, top, bot, blank)
+			s.buf.WriteString(ansi.SetTopBottomMargins(1, maxY+1))
+			s.cur.X, s.cur.Y = -1, -1
+		}
+
+		if !v {
+			v = s.scrollIdl(n, top, bot-n+1, blank)
+		}
+
+		// Clear newly shifted-in lines.
+		if v &&
+			(nonDestScrollRegion || (memoryBelow && bot == maxY)) {
+			if bot == maxY {
+				s.move(0, bot-n+1)
+				s.clearToBottom(nil)
+			} else {
+				for i := 0; i < n; i++ {
+					s.move(0, bot-i)
+					s.clearToEnd(nil, false)
+				}
+			}
+		}
+	} else if n < 0 {
+		// Scroll down (backward)
+		v = s.scrollDown(-n, top, bot, 0, maxY, blank)
+		if !v {
+			s.buf.WriteString(ansi.SetTopBottomMargins(top+1, bot+1))
+
+			// XXX: How should we handle this in inline mode when not using alternate screen?
+			s.cur.X, s.cur.Y = -1, -1
+			v = s.scrollDown(-n, top, bot, top, bot, blank)
+			s.buf.WriteString(ansi.SetTopBottomMargins(1, maxY+1))
+			s.cur.X, s.cur.Y = -1, -1
+
+			if !v {
+				v = s.scrollIdl(-n, bot+n+1, top, blank)
+			}
+
+			// Clear newly shifted-in lines.
+			if v &&
+				(nonDestScrollRegion || (memoryBelow && top == 0)) {
+				for i := 0; i < -n; i++ {
+					s.move(0, top+i)
+					s.clearToEnd(nil, false)
+				}
+			}
+		}
+	}
+
+	if !v {
+		return
+	}
+
+	s.scrollBuffer(s.curbuf, n, top, bot, blank)
+
+	// shift hash values too, they can be reused
+	s.scrollOldhash(n, top, bot)
+
+	return true
+}
+
+// scrollBuffer scrolls the buffer by n lines.
+func (s *Screen) scrollBuffer(b *Buffer, n, top, bot int, blank *Cell) {
+	if top < 0 || bot < top || bot >= b.Height() {
+		// Nothing to scroll
+		return
+	}
+
+	if n < 0 {
+		// shift n lines downwards
+		limit := top - n
+		for line := bot; line >= limit && line >= 0 && line >= top; line-- {
+			copy(b.Lines[line], b.Lines[line+n])
+		}
+		for line := top; line < limit && line <= b.Height()-1 && line <= bot; line++ {
+			b.FillRect(blank, Rect(0, line, b.Width(), 1))
+		}
+	}
+
+	if n > 0 {
+		// shift n lines upwards
+		limit := bot - n
+		for line := top; line <= limit && line <= b.Height()-1 && line <= bot; line++ {
+			copy(b.Lines[line], b.Lines[line+n])
+		}
+		for line := bot; line > limit && line >= 0 && line >= top; line-- {
+			b.FillRect(blank, Rect(0, line, b.Width(), 1))
+		}
+	}
+
+	s.touchLine(b.Width(), b.Height(), top, bot-top+1, true)
+}
+
+// touchLine marks the line as touched.
+func (s *Screen) touchLine(width, height, y, n int, changed bool) {
+	if n < 0 || y < 0 || y >= height {
+		return // Nothing to touch
+	}
+
+	for i := y; i < y+n && i < height; i++ {
+		if changed {
+			s.touch[i] = lineData{firstCell: 0, lastCell: width - 1}
+		} else {
+			delete(s.touch, i)
+		}
+	}
+}
+
+// scrollUp scrolls the screen up by n lines.
+func (s *Screen) scrollUp(n, top, bot, minY, maxY int, blank *Cell) bool {
+	if n == 1 && top == minY && bot == maxY {
+		s.move(0, bot)
+		s.updatePen(blank)
+		s.buf.WriteByte('\n')
+	} else if n == 1 && bot == maxY {
+		s.move(0, top)
+		s.updatePen(blank)
+		s.buf.WriteString(ansi.DeleteLine(1))
+	} else if top == minY && bot == maxY {
+		if s.xtermLike {
+			s.move(0, bot)
+		} else {
+			s.move(0, top)
+		}
+		s.updatePen(blank)
+		if s.xtermLike {
+			s.buf.WriteString(ansi.ScrollUp(n))
+		} else {
+			s.buf.WriteString(strings.Repeat("\n", n))
+		}
+	} else if bot == maxY {
+		s.move(0, top)
+		s.updatePen(blank)
+		s.buf.WriteString(ansi.DeleteLine(n))
+	} else {
+		return false
+	}
+	return true
+}
+
+// scrollDown scrolls the screen down by n lines.
+func (s *Screen) scrollDown(n, top, bot, minY, maxY int, blank *Cell) bool {
+	if n == 1 && top == minY && bot == maxY {
+		s.move(0, top)
+		s.updatePen(blank)
+		s.buf.WriteString(ansi.ReverseIndex)
+	} else if n == 1 && bot == maxY {
+		s.move(0, top)
+		s.updatePen(blank)
+		s.buf.WriteString(ansi.InsertLine(1))
+	} else if top == minY && bot == maxY {
+		s.move(0, top)
+		s.updatePen(blank)
+		if s.xtermLike {
+			s.buf.WriteString(ansi.ScrollDown(n))
+		} else {
+			s.buf.WriteString(strings.Repeat(ansi.ReverseIndex, n))
+		}
+	} else if bot == maxY {
+		s.move(0, top)
+		s.updatePen(blank)
+		s.buf.WriteString(ansi.InsertLine(n))
+	} else {
+		return false
+	}
+	return true
+}
+
+// scrollIdl scrolls the screen n lines by using [ansi.DL] at del and using
+// [ansi.IL] at ins.
+func (s *Screen) scrollIdl(n, del, ins int, blank *Cell) bool {
+	if n < 0 {
+		return false
+	}
+
+	// Delete lines
+	s.move(0, del)
+	s.updatePen(blank)
+	s.buf.WriteString(ansi.DeleteLine(n))
+
+	// Insert lines
+	s.move(0, ins)
+	s.updatePen(blank)
+	s.buf.WriteString(ansi.InsertLine(n))
+
+	return true
+}

vendor/github.com/charmbracelet/x/cellbuf/hashmap.go

@@ -0,0 +1,301 @@
+package cellbuf
+
+import (
+	"github.com/charmbracelet/x/ansi"
+)
+
+// hash returns the hash value of a [Line].
+func hash(l Line) (h uint64) {
+	for _, c := range l {
+		var r rune
+		if c == nil {
+			r = ansi.SP
+		} else {
+			r = c.Rune
+		}
+		h += (h << 5) + uint64(r)
+	}
+	return
+}
+
+// hashmap represents a single [Line] hash.
+type hashmap struct {
+	value              uint64
+	oldcount, newcount int
+	oldindex, newindex int
+}
+
+// The value used to indicate lines created by insertions and scrolls.
+const newIndex = -1
+
+// updateHashmap updates the hashmap with the new hash value.
+func (s *Screen) updateHashmap() {
+	height := s.newbuf.Height()
+	if len(s.oldhash) >= height && len(s.newhash) >= height {
+		// rehash changed lines
+		for i := 0; i < height; i++ {
+			_, ok := s.touch[i]
+			if ok {
+				s.oldhash[i] = hash(s.curbuf.Line(i))
+				s.newhash[i] = hash(s.newbuf.Line(i))
+			}
+		}
+	} else {
+		// rehash all
+		if len(s.oldhash) != height {
+			s.oldhash = make([]uint64, height)
+		}
+		if len(s.newhash) != height {
+			s.newhash = make([]uint64, height)
+		}
+		for i := 0; i < height; i++ {
+			s.oldhash[i] = hash(s.curbuf.Line(i))
+			s.newhash[i] = hash(s.newbuf.Line(i))
+		}
+	}
+
+	s.hashtab = make([]hashmap, height*2)
+	for i := 0; i < height; i++ {
+		hashval := s.oldhash[i]
+
+		// Find matching hash or empty slot
+		idx := 0
+		for idx < len(s.hashtab) && s.hashtab[idx].value != 0 {
+			if s.hashtab[idx].value == hashval {
+				break
+			}
+			idx++
+		}
+
+		s.hashtab[idx].value = hashval // in case this is a new hash
+		s.hashtab[idx].oldcount++
+		s.hashtab[idx].oldindex = i
+	}
+	for i := 0; i < height; i++ {
+		hashval := s.newhash[i]
+
+		// Find matching hash or empty slot
+		idx := 0
+		for idx < len(s.hashtab) && s.hashtab[idx].value != 0 {
+			if s.hashtab[idx].value == hashval {
+				break
+			}
+			idx++
+		}
+
+		s.hashtab[idx].value = hashval // in case this is a new hash
+		s.hashtab[idx].newcount++
+		s.hashtab[idx].newindex = i
+
+		s.oldnum[i] = newIndex // init old indices slice
+	}
+
+	// Mark line pair corresponding to unique hash pairs.
+	for i := 0; i < len(s.hashtab) && s.hashtab[i].value != 0; i++ {
+		hsp := &s.hashtab[i]
+		if hsp.oldcount == 1 && hsp.newcount == 1 && hsp.oldindex != hsp.newindex {
+			s.oldnum[hsp.newindex] = hsp.oldindex
+		}
+	}
+
+	s.growHunks()
+
+	// Eliminate bad or impossible shifts. This includes removing those hunks
+	// which could not grow because of conflicts, as well those which are to be
+	// moved too far, they are likely to destroy more than carry.
+	for i := 0; i < height; {
+		var start, shift, size int
+		for i < height && s.oldnum[i] == newIndex {
+			i++
+		}
+		if i >= height {
+			break
+		}
+		start = i
+		shift = s.oldnum[i] - i
+		i++
+		for i < height && s.oldnum[i] != newIndex && s.oldnum[i]-i == shift {
+			i++
+		}
+		size = i - start
+		if size < 3 || size+min(size/8, 2) < abs(shift) {
+			for start < i {
+				s.oldnum[start] = newIndex
+				start++
+			}
+		}
+	}
+
+	// After clearing invalid hunks, try grow the rest.
+	s.growHunks()
+}
+
+// scrollOldhash
+func (s *Screen) scrollOldhash(n, top, bot int) {
+	if len(s.oldhash) == 0 {
+		return
+	}
+
+	size := bot - top + 1 - abs(n)
+	if n > 0 {
+		// Move existing hashes up
+		copy(s.oldhash[top:], s.oldhash[top+n:top+n+size])
+		// Recalculate hashes for newly shifted-in lines
+		for i := bot; i > bot-n; i-- {
+			s.oldhash[i] = hash(s.curbuf.Line(i))
+		}
+	} else {
+		// Move existing hashes down
+		copy(s.oldhash[top-n:], s.oldhash[top:top+size])
+		// Recalculate hashes for newly shifted-in lines
+		for i := top; i < top-n; i++ {
+			s.oldhash[i] = hash(s.curbuf.Line(i))
+		}
+	}
+}
+
+func (s *Screen) growHunks() {
+	var (
+		backLimit    int // limits for cells to fill
+		backRefLimit int // limit for references
+		i            int
+		nextHunk     int
+	)
+
+	height := s.newbuf.Height()
+	for i < height && s.oldnum[i] == newIndex {
+		i++
+	}
+	for ; i < height; i = nextHunk {
+		var (
+			forwardLimit    int
+			forwardRefLimit int
+			end             int
+			start           = i
+			shift           = s.oldnum[i] - i
+		)
+
+		// get forward limit
+		i = start + 1
+		for i < height &&
+			s.oldnum[i] != newIndex &&
+			s.oldnum[i]-i == shift {
+			i++
+		}
+
+		end = i
+		for i < height && s.oldnum[i] == newIndex {
+			i++
+		}
+
+		nextHunk = i
+		forwardLimit = i
+		if i >= height || s.oldnum[i] >= i {
+			forwardRefLimit = i
+		} else {
+			forwardRefLimit = s.oldnum[i]
+		}
+
+		i = start - 1
+
+		// grow back
+		if shift < 0 {
+			backLimit = backRefLimit + (-shift)
+		}
+		for i >= backLimit {
+			if s.newhash[i] == s.oldhash[i+shift] ||
+				s.costEffective(i+shift, i, shift < 0) {
+				s.oldnum[i] = i + shift
+			} else {
+				break
+			}
+			i--
+		}
+
+		i = end
+		// grow forward
+		if shift > 0 {
+			forwardLimit = forwardRefLimit - shift
+		}
+		for i < forwardLimit {
+			if s.newhash[i] == s.oldhash[i+shift] ||
+				s.costEffective(i+shift, i, shift > 0) {
+				s.oldnum[i] = i + shift
+			} else {
+				break
+			}
+			i++
+		}
+
+		backLimit = i
+		backRefLimit = backLimit
+		if shift > 0 {
+			backRefLimit += shift
+		}
+	}
+}
+
+// costEffective returns true if the cost of moving line 'from' to line 'to' seems to be
+// cost effective. 'blank' indicates whether the line 'to' would become blank.
+func (s *Screen) costEffective(from, to int, blank bool) bool {
+	if from == to {
+		return false
+	}
+
+	newFrom := s.oldnum[from]
+	if newFrom == newIndex {
+		newFrom = from
+	}
+
+	// On the left side of >= is the cost before moving. On the right side --
+	// cost after moving.
+
+	// Calculate costs before moving.
+	var costBeforeMove int
+	if blank {
+		// Cost of updating blank line at destination.
+		costBeforeMove = s.updateCostBlank(s.newbuf.Line(to))
+	} else {
+		// Cost of updating exiting line at destination.
+		costBeforeMove = s.updateCost(s.curbuf.Line(to), s.newbuf.Line(to))
+	}
+
+	// Add cost of updating source line
+	costBeforeMove += s.updateCost(s.curbuf.Line(newFrom), s.newbuf.Line(from))
+
+	// Calculate costs after moving.
+	var costAfterMove int
+	if newFrom == from {
+		// Source becomes blank after move
+		costAfterMove = s.updateCostBlank(s.newbuf.Line(from))
+	} else {
+		// Source gets updated from another line
+		costAfterMove = s.updateCost(s.curbuf.Line(newFrom), s.newbuf.Line(from))
+	}
+
+	// Add cost of moving source line to destination
+	costAfterMove += s.updateCost(s.curbuf.Line(from), s.newbuf.Line(to))
+
+	// Return true if moving is cost effective (costs less or equal)
+	return costBeforeMove >= costAfterMove
+}
+
+func (s *Screen) updateCost(from, to Line) (cost int) {
+	var fidx, tidx int
+	for i := s.newbuf.Width() - 1; i > 0; i, fidx, tidx = i-1, fidx+1, tidx+1 {
+		if !cellEqual(from.At(fidx), to.At(tidx)) {
+			cost++
+		}
+	}
+	return
+}
+
+func (s *Screen) updateCostBlank(to Line) (cost int) {
+	var tidx int
+	for i := s.newbuf.Width() - 1; i > 0; i, tidx = i-1, tidx+1 {
+		if !cellEqual(nil, to.At(tidx)) {
+			cost++
+		}
+	}
+	return
+}

vendor/github.com/charmbracelet/x/cellbuf/link.go

@@ -0,0 +1,14 @@
+package cellbuf
+
+import (
+	"github.com/charmbracelet/colorprofile"
+)
+
+// Convert converts a hyperlink to respect the given color profile.
+func ConvertLink(h Link, p colorprofile.Profile) Link {
+	if p == colorprofile.NoTTY {
+		return Link{}
+	}
+
+	return h
+}

vendor/github.com/charmbracelet/x/cellbuf/sequence.go

@@ -0,0 +1,131 @@
+package cellbuf
+
+import (
+	"bytes"
+	"image/color"
+
+	"github.com/charmbracelet/x/ansi"
+)
+
+// ReadStyle reads a Select Graphic Rendition (SGR) escape sequences from a
+// list of parameters.
+func ReadStyle(params ansi.Params, pen *Style) {
+	if len(params) == 0 {
+		pen.Reset()
+		return
+	}
+
+	for i := 0; i < len(params); i++ {
+		param, hasMore, _ := params.Param(i, 0)
+		switch param {
+		case 0: // Reset
+			pen.Reset()
+		case 1: // Bold
+			pen.Bold(true)
+		case 2: // Dim/Faint
+			pen.Faint(true)
+		case 3: // Italic
+			pen.Italic(true)
+		case 4: // Underline
+			nextParam, _, ok := params.Param(i+1, 0)
+			if hasMore && ok { // Only accept subparameters i.e. separated by ":"
+				switch nextParam {
+				case 0, 1, 2, 3, 4, 5:
+					i++
+					switch nextParam {
+					case 0: // No Underline
+						pen.UnderlineStyle(NoUnderline)
+					case 1: // Single Underline
+						pen.UnderlineStyle(SingleUnderline)
+					case 2: // Double Underline
+						pen.UnderlineStyle(DoubleUnderline)
+					case 3: // Curly Underline
+						pen.UnderlineStyle(CurlyUnderline)
+					case 4: // Dotted Underline
+						pen.UnderlineStyle(DottedUnderline)
+					case 5: // Dashed Underline
+						pen.UnderlineStyle(DashedUnderline)
+					}
+				}
+			} else {
+				// Single Underline
+				pen.Underline(true)
+			}
+		case 5: // Slow Blink
+			pen.SlowBlink(true)
+		case 6: // Rapid Blink
+			pen.RapidBlink(true)
+		case 7: // Reverse
+			pen.Reverse(true)
+		case 8: // Conceal
+			pen.Conceal(true)
+		case 9: // Crossed-out/Strikethrough
+			pen.Strikethrough(true)
+		case 22: // Normal Intensity (not bold or faint)
+			pen.Bold(false).Faint(false)
+		case 23: // Not italic, not Fraktur
+			pen.Italic(false)
+		case 24: // Not underlined
+			pen.Underline(false)
+		case 25: // Blink off
+			pen.SlowBlink(false).RapidBlink(false)
+		case 27: // Positive (not reverse)
+			pen.Reverse(false)
+		case 28: // Reveal
+			pen.Conceal(false)
+		case 29: // Not crossed out
+			pen.Strikethrough(false)
+		case 30, 31, 32, 33, 34, 35, 36, 37: // Set foreground
+			pen.Foreground(ansi.Black + ansi.BasicColor(param-30)) //nolint:gosec
+		case 38: // Set foreground 256 or truecolor
+			var c color.Color
+			n := ReadStyleColor(params[i:], &c)
+			if n > 0 {
+				pen.Foreground(c)
+				i += n - 1
+			}
+		case 39: // Default foreground
+			pen.Foreground(nil)
+		case 40, 41, 42, 43, 44, 45, 46, 47: // Set background
+			pen.Background(ansi.Black + ansi.BasicColor(param-40)) //nolint:gosec
+		case 48: // Set background 256 or truecolor
+			var c color.Color
+			n := ReadStyleColor(params[i:], &c)
+			if n > 0 {
+				pen.Background(c)
+				i += n - 1
+			}
+		case 49: // Default Background
+			pen.Background(nil)
+		case 58: // Set underline color
+			var c color.Color
+			n := ReadStyleColor(params[i:], &c)
+			if n > 0 {
+				pen.UnderlineColor(c)
+				i += n - 1
+			}
+		case 59: // Default underline color
+			pen.UnderlineColor(nil)
+		case 90, 91, 92, 93, 94, 95, 96, 97: // Set bright foreground
+			pen.Foreground(ansi.BrightBlack + ansi.BasicColor(param-90)) //nolint:gosec
+		case 100, 101, 102, 103, 104, 105, 106, 107: // Set bright background
+			pen.Background(ansi.BrightBlack + ansi.BasicColor(param-100)) //nolint:gosec
+		}
+	}
+}
+
+// ReadLink reads a hyperlink escape sequence from a data buffer.
+func ReadLink(p []byte, link *Link) {
+	params := bytes.Split(p, []byte{';'})
+	if len(params) != 3 {
+		return
+	}
+	link.Params = string(params[1])
+	link.URL = string(params[2])
+}
+
+// ReadStyleColor reads a color from a list of parameters.
+// See [ansi.ReadStyleColor] for more information.
+func ReadStyleColor(params ansi.Params, c *color.Color) int {
+	return ansi.ReadStyleColor(params, c)
+}

vendor/github.com/charmbracelet/x/cellbuf/style.go

@@ -0,0 +1,31 @@
+package cellbuf
+
+import (
+	"github.com/charmbracelet/colorprofile"
+)
+
+// Convert converts a style to respect the given color profile.
+func ConvertStyle(s Style, p colorprofile.Profile) Style {
+	switch p {
+	case colorprofile.TrueColor:
+		return s
+	case colorprofile.Ascii:
+		s.Fg = nil
+		s.Bg = nil
+		s.Ul = nil
+	case colorprofile.NoTTY:
+		return Style{}
+	}
+
+	if s.Fg != nil {
+		s.Fg = p.Convert(s.Fg)
+	}
+	if s.Bg != nil {
+		s.Bg = p.Convert(s.Bg)
+	}
+	if s.Ul != nil {
+		s.Ul = p.Convert(s.Ul)
+	}
+
+	return s
+}

vendor/github.com/charmbracelet/x/cellbuf/tabstop.go

@@ -0,0 +1,137 @@
+package cellbuf
+
+// DefaultTabInterval is the default tab interval.
+const DefaultTabInterval = 8
+
+// TabStops represents horizontal line tab stops.
+type TabStops struct {
+	stops    []int
+	interval int
+	width    int
+}
+
+// NewTabStops creates a new set of tab stops from a number of columns and an
+// interval.
+func NewTabStops(width, interval int) *TabStops {
+	ts := new(TabStops)
+	ts.interval = interval
+	ts.width = width
+	ts.stops = make([]int, (width+(interval-1))/interval)
+	ts.init(0, width)
+	return ts
+}
+
+// DefaultTabStops creates a new set of tab stops with the default interval.
+func DefaultTabStops(cols int) *TabStops {
+	return NewTabStops(cols, DefaultTabInterval)
+}
+
+// Resize resizes the tab stops to the given width.
+func (ts *TabStops) Resize(width int) {
+	if width == ts.width {
+		return
+	}
+
+	if width < ts.width {
+		size := (width + (ts.interval - 1)) / ts.interval
+		ts.stops = ts.stops[:size]
+	} else {
+		size := (width - ts.width + (ts.interval - 1)) / ts.interval
+		ts.stops = append(ts.stops, make([]int, size)...)
+	}
+
+	ts.init(ts.width, width)
+	ts.width = width
+}
+
+// IsStop returns true if the given column is a tab stop.
+func (ts TabStops) IsStop(col int) bool {
+	mask := ts.mask(col)
+	i := col >> 3
+	if i < 0 || i >= len(ts.stops) {
+		return false
+	}
+	return ts.stops[i]&mask != 0
+}
+
+// Next returns the next tab stop after the given column.
+func (ts TabStops) Next(col int) int {
+	return ts.Find(col, 1)
+}
+
+// Prev returns the previous tab stop before the given column.
+func (ts TabStops) Prev(col int) int {
+	return ts.Find(col, -1)
+}
+
+// Find returns the prev/next tab stop before/after the given column and delta.
+// If delta is positive, it returns the next tab stop after the given column.
+// If delta is negative, it returns the previous tab stop before the given column.
+// If delta is zero, it returns the given column.
+func (ts TabStops) Find(col, delta int) int {
+	if delta == 0 {
+		return col
+	}
+
+	var prev bool
+	count := delta
+	if count < 0 {
+		count = -count
+		prev = true
+	}
+
+	for count > 0 {
+		if !prev {
+			if col >= ts.width-1 {
+				return col
+			}
+
+			col++
+		} else {
+			if col < 1 {
+				return col
+			}
+
+			col--
+		}
+
+		if ts.IsStop(col) {
+			count--
+		}
+	}
+
+	return col
+}
+
+// Set adds a tab stop at the given column.
+func (ts *TabStops) Set(col int) {
+	mask := ts.mask(col)
+	ts.stops[col>>3] |= mask
+}
+
+// Reset removes the tab stop at the given column.
+func (ts *TabStops) Reset(col int) {
+	mask := ts.mask(col)
+	ts.stops[col>>3] &= ^mask
+}
+
+// Clear removes all tab stops.
+func (ts *TabStops) Clear() {
+	ts.stops = make([]int, len(ts.stops))
+}
+
+// mask returns the mask for the given column.
+func (ts *TabStops) mask(col int) int {
+	return 1 << (col & (ts.interval - 1))
+}
+
+// init initializes the tab stops starting from col until width.
+func (ts *TabStops) init(col, width int) {
+	for x := col; x < width; x++ {
+		if x%ts.interval == 0 {
+			ts.Set(x)
+		} else {
+			ts.Reset(x)
+		}
+	}
+}

vendor/github.com/charmbracelet/x/cellbuf/utils.go

@@ -0,0 +1,38 @@
+package cellbuf
+
+import (
+	"strings"
+)
+
+// Height returns the height of a string.
+func Height(s string) int {
+	return strings.Count(s, "\n") + 1
+}
+
+func min(a, b int) int { //nolint:predeclared
+	if a > b {
+		return b
+	}
+	return a
+}
+
+func max(a, b int) int { //nolint:predeclared
+	if a > b {
+		return a
+	}
+	return b
+}
+
+func clamp(v, low, high int) int {
+	if high < low {
+		low, high = high, low
+	}
+	return min(high, max(low, v))
+}
+
+func abs(a int) int {
+	if a < 0 {
+		return -a
+	}
+	return a
+}

vendor/github.com/charmbracelet/x/cellbuf/wrap.go

@@ -0,0 +1,178 @@
+package cellbuf
+
+import (
+	"bytes"
+	"unicode"
+	"unicode/utf8"
+
+	"github.com/charmbracelet/x/ansi"
+)
+
+// Wrap returns a string that is wrapped to the specified limit applying any
+// ANSI escape sequences in the string. It tries to wrap the string at word
+// boundaries, but will break words if necessary.
+//
+// The breakpoints string is a list of characters that are considered
+// breakpoints for word wrapping. A hyphen (-) is always considered a
+// breakpoint.
+//
+// Note: breakpoints must be a string of 1-cell wide rune characters.
+func Wrap(s string, limit int, breakpoints string) string {
+	if len(s) == 0 {
+		return ""
+	}
+
+	if limit < 1 {
+		return s
+	}
+
+	p := ansi.GetParser()
+	defer ansi.PutParser(p)
+
+	var (
+		buf             bytes.Buffer
+		word            bytes.Buffer
+		space           bytes.Buffer
+		style, curStyle Style
+		link, curLink   Link
+		curWidth        int
+		wordLen         int
+	)
+
+	addSpace := func() {
+		curWidth += space.Len()
+		buf.Write(space.Bytes())
+		space.Reset()
+	}
+
+	addWord := func() {
+		if word.Len() == 0 {
+			return
+		}
+
+		curLink = link
+		curStyle = style
+
+		addSpace()
+		curWidth += wordLen
+		buf.Write(word.Bytes())
+		word.Reset()
+		wordLen = 0
+	}
+
+	addNewline := func() {
+		if !curStyle.Empty() {
+			buf.WriteString(ansi.ResetStyle)
+		}
+		if !curLink.Empty() {
+			buf.WriteString(ansi.ResetHyperlink())
+		}
+		buf.WriteByte('\n')
+		if !curLink.Empty() {
+			buf.WriteString(ansi.SetHyperlink(curLink.URL, curLink.Params))
+		}
+		if !curStyle.Empty() {
+			buf.WriteString(curStyle.Sequence())
+		}
+		curWidth = 0
+		space.Reset()
+	}
+
+	var state byte
+	for len(s) > 0 {
+		seq, width, n, newState := ansi.DecodeSequence(s, state, p)
+		switch width {
+		case 0:
+			if ansi.Equal(seq, "\t") {
+				addWord()
+				space.WriteString(seq)
+				break
+			} else if ansi.Equal(seq, "\n") {
+				if wordLen == 0 {
+					if curWidth+space.Len() > limit {
+						curWidth = 0
+					} else {
+						// preserve whitespaces
+						buf.Write(space.Bytes())
+					}
+					space.Reset()
+				}
+
+				addWord()
+				addNewline()
+				break
+			} else if ansi.HasCsiPrefix(seq) && p.Command() == 'm' {
+				// SGR style sequence [ansi.SGR]
+				ReadStyle(p.Params(), &style)
+			} else if ansi.HasOscPrefix(seq) && p.Command() == 8 {
+				// Hyperlink sequence [ansi.SetHyperlink]
+				ReadLink(p.Data(), &link)
+			}
+
+			word.WriteString(seq)
+		default:
+			if len(seq) == 1 {
+				// ASCII
+				r, _ := utf8.DecodeRuneInString(seq)
+				if unicode.IsSpace(r) {
+					addWord()
+					space.WriteRune(r)
+					break
+				} else if r == '-' || runeContainsAny(r, breakpoints) {
+					addSpace()
+					if curWidth+wordLen+width <= limit {
+						addWord()
+						buf.WriteString(seq)
+						curWidth += width
+						break
+					}
+				}
+			}
+
+			if wordLen+width > limit {
+				// Hardwrap the word if it's too long
+				addWord()
+			}
+
+			word.WriteString(seq)
+			wordLen += width
+
+			if curWidth+wordLen+space.Len() > limit {
+				addNewline()
+			}
+		}
+
+		s = s[n:]
+		state = newState
+	}
+
+	if wordLen == 0 {
+		if curWidth+space.Len() > limit {
+			curWidth = 0
+		} else {
+			// preserve whitespaces
+			buf.Write(space.Bytes())
+		}
+		space.Reset()
+	}
+
+	addWord()
+
+	if !curLink.Empty() {
+		buf.WriteString(ansi.ResetHyperlink())
+	}
+	if !curStyle.Empty() {
+		buf.WriteString(ansi.ResetStyle)
+	}
+
+	return buf.String()
+}
+
+func runeContainsAny[T string | []rune](r rune, s T) bool {
+	for _, c := range []rune(s) {
+		if c == r {
+			return true
+		}
+	}
+	return false
+}

vendor/github.com/charmbracelet/x/cellbuf/writer.go

@@ -0,0 +1,339 @@
+package cellbuf
+
+import (
+	"bytes"
+	"fmt"
+	"strings"
+
+	"github.com/charmbracelet/x/ansi"
+)
+
+// CellBuffer is a cell buffer that represents a set of cells in a screen or a
+// grid.
+type CellBuffer interface {
+	// Cell returns the cell at the given position.
+	Cell(x, y int) *Cell
+	// SetCell sets the cell at the given position to the given cell. It
+	// returns whether the cell was set successfully.
+	SetCell(x, y int, c *Cell) bool
+	// Bounds returns the bounds of the cell buffer.
+	Bounds() Rectangle
+}
+
+// FillRect fills the rectangle within the cell buffer with the given cell.
+// This will not fill cells outside the bounds of the cell buffer.
+func FillRect(s CellBuffer, c *Cell, rect Rectangle) {
+	for y := rect.Min.Y; y < rect.Max.Y; y++ {
+		for x := rect.Min.X; x < rect.Max.X; x++ {
+			s.SetCell(x, y, c) //nolint:errcheck
+		}
+	}
+}
+
+// Fill fills the cell buffer with the given cell.
+func Fill(s CellBuffer, c *Cell) {
+	FillRect(s, c, s.Bounds())
+}
+
+// ClearRect clears the rectangle within the cell buffer with blank cells.
+func ClearRect(s CellBuffer, rect Rectangle) {
+	FillRect(s, nil, rect)
+}
+
+// Clear clears the cell buffer with blank cells.
+func Clear(s CellBuffer) {
+	Fill(s, nil)
+}
+
+// SetContentRect clears the rectangle within the cell buffer with blank cells,
+// and sets the given string as its content. If the height or width of the
+// string exceeds the height or width of the cell buffer, it will be truncated.
+func SetContentRect(s CellBuffer, str string, rect Rectangle) {
+	// Replace all "\n" with "\r\n" to ensure the cursor is reset to the start
+	// of the line. Make sure we don't replace "\r\n" with "\r\r\n".
+	str = strings.ReplaceAll(str, "\r\n", "\n")
+	str = strings.ReplaceAll(str, "\n", "\r\n")
+	ClearRect(s, rect)
+	printString(s, ansi.GraphemeWidth, rect.Min.X, rect.Min.Y, rect, str, true, "")
+}
+
+// SetContent clears the cell buffer with blank cells, and sets the given string
+// as its content. If the height or width of the string exceeds the height or
+// width of the cell buffer, it will be truncated.
+func SetContent(s CellBuffer, str string) {
+	SetContentRect(s, str, s.Bounds())
+}
+
+// Render returns a string representation of the grid with ANSI escape sequences.
+func Render(d CellBuffer) string {
+	var buf bytes.Buffer
+	height := d.Bounds().Dy()
+	for y := 0; y < height; y++ {
+		_, line := RenderLine(d, y)
+		buf.WriteString(line)
+		if y < height-1 {
+			buf.WriteString("\r\n")
+		}
+	}
+	return buf.String()
+}
+
+// RenderLine returns a string representation of the yth line of the grid along
+// with the width of the line.
+func RenderLine(d CellBuffer, n int) (w int, line string) {
+	var pen Style
+	var link Link
+	var buf bytes.Buffer
+	var pendingLine string
+	var pendingWidth int // this ignores space cells until we hit a non-space cell
+
+	writePending := func() {
+		// If there's no pending line, we don't need to do anything.
+		if len(pendingLine) == 0 {
+			return
+		}
+		buf.WriteString(pendingLine)
+		w += pendingWidth
+		pendingWidth = 0
+		pendingLine = ""
+	}
+
+	for x := 0; x < d.Bounds().Dx(); x++ {
+		if cell := d.Cell(x, n); cell != nil && cell.Width > 0 {
+			// Convert the cell's style and link to the given color profile.
+			cellStyle := cell.Style
+			cellLink := cell.Link
+			if cellStyle.Empty() && !pen.Empty() {
+				writePending()
+				buf.WriteString(ansi.ResetStyle) //nolint:errcheck
+				pen.Reset()
+			}
+			if !cellStyle.Equal(&pen) {
+				writePending()
+				seq := cellStyle.DiffSequence(pen)
+				buf.WriteString(seq) // nolint:errcheck
+				pen = cellStyle
+			}
+
+			// Write the URL escape sequence
+			if cellLink != link && link.URL != "" {
+				writePending()
+				buf.WriteString(ansi.ResetHyperlink()) //nolint:errcheck
+				link.Reset()
+			}
+			if cellLink != link {
+				writePending()
+				buf.WriteString(ansi.SetHyperlink(cellLink.URL, cellLink.Params)) //nolint:errcheck
+				link = cellLink
+			}
+
+			// We only write the cell content if it's not empty. If it is, we
+			// append it to the pending line and width to be evaluated later.
+			if cell.Equal(&BlankCell) {
+				pendingLine += cell.String()
+				pendingWidth += cell.Width
+			} else {
+				writePending()
+				buf.WriteString(cell.String())
+				w += cell.Width
+			}
+		}
+	}
+	if link.URL != "" {
+		buf.WriteString(ansi.ResetHyperlink()) //nolint:errcheck
+	}
+	if !pen.Empty() {
+		buf.WriteString(ansi.ResetStyle) //nolint:errcheck
+	}
+	return w, strings.TrimRight(buf.String(), " ") // Trim trailing spaces
+}
+
+// ScreenWriter represents a writer that writes to a [Screen] parsing ANSI
+// escape sequences and Unicode characters and converting them into cells that
+// can be written to a cell [Buffer].
+type ScreenWriter struct {
+	*Screen
+}
+
+// NewScreenWriter creates a new ScreenWriter that writes to the given Screen.
+// This is a convenience function for creating a ScreenWriter.
+func NewScreenWriter(s *Screen) *ScreenWriter {
+	return &ScreenWriter{s}
+}
+
+// Write writes the given bytes to the screen.
+// This will recognize ANSI [ansi.SGR] style and [ansi.SetHyperlink] escape
+// sequences.
+func (s *ScreenWriter) Write(p []byte) (n int, err error) {
+	printString(s.Screen, s.method,
+		s.cur.X, s.cur.Y, s.Bounds(),
+		p, false, "")
+	return len(p), nil
+}
+
+// SetContent clears the screen with blank cells, and sets the given string as
+// its content. If the height or width of the string exceeds the height or
+// width of the screen, it will be truncated.
+//
+// This will recognize ANSI [ansi.SGR] style and [ansi.SetHyperlink] escape sequences.
+func (s *ScreenWriter) SetContent(str string) {
+	s.SetContentRect(str, s.Bounds())
+}
+
+// SetContentRect clears the rectangle within the screen with blank cells, and
+// sets the given string as its content. If the height or width of the string
+// exceeds the height or width of the screen, it will be truncated.
+//
+// This will recognize ANSI [ansi.SGR] style and [ansi.SetHyperlink] escape
+// sequences.
+func (s *ScreenWriter) SetContentRect(str string, rect Rectangle) {
+	// Replace all "\n" with "\r\n" to ensure the cursor is reset to the start
+	// of the line. Make sure we don't replace "\r\n" with "\r\r\n".
+	str = strings.ReplaceAll(str, "\r\n", "\n")
+	str = strings.ReplaceAll(str, "\n", "\r\n")
+	s.ClearRect(rect)
+	printString(s.Screen, s.method,
+		rect.Min.X, rect.Min.Y, rect,
+		str, true, "")
+}
+
+// Print prints the string at the current cursor position. It will wrap the
+// string to the width of the screen if it exceeds the width of the screen.
+// This will recognize ANSI [ansi.SGR] style and [ansi.SetHyperlink] escape
+// sequences.
+func (s *ScreenWriter) Print(str string, v ...interface{}) {
+	if len(v) > 0 {
+		str = fmt.Sprintf(str, v...)
+	}
+	printString(s.Screen, s.method,
+		s.cur.X, s.cur.Y, s.Bounds(),
+		str, false, "")
+}
+
+// PrintAt prints the string at the given position. It will wrap the string to
+// the width of the screen if it exceeds the width of the screen.
+// This will recognize ANSI [ansi.SGR] style and [ansi.SetHyperlink] escape
+// sequences.
+func (s *ScreenWriter) PrintAt(x, y int, str string, v ...interface{}) {
+	if len(v) > 0 {
+		str = fmt.Sprintf(str, v...)
+	}
+	printString(s.Screen, s.method,
+		x, y, s.Bounds(),
+		str, false, "")
+}
+
+// PrintCrop prints the string at the current cursor position and truncates the
+// text if it exceeds the width of the screen. Use tail to specify a string to
+// append if the string is truncated.
+// This will recognize ANSI [ansi.SGR] style and [ansi.SetHyperlink] escape
+// sequences.
+func (s *ScreenWriter) PrintCrop(str string, tail string) {
+	printString(s.Screen, s.method,
+		s.cur.X, s.cur.Y, s.Bounds(),
+		str, true, tail)
+}
+
+// PrintCropAt prints the string at the given position and truncates the text
+// if it exceeds the width of the screen. Use tail to specify a string to append
+// if the string is truncated.
+// This will recognize ANSI [ansi.SGR] style and [ansi.SetHyperlink] escape
+// sequences.
+func (s *ScreenWriter) PrintCropAt(x, y int, str string, tail string) {
+	printString(s.Screen, s.method,
+		x, y, s.Bounds(),
+		str, true, tail)
+}
+
+// printString draws a string starting at the given position.
+func printString[T []byte | string](
+	s CellBuffer,
+	m ansi.Method,
+	x, y int,
+	bounds Rectangle, str T,
+	truncate bool, tail string,
+) {
+	p := ansi.GetParser()
+	defer ansi.PutParser(p)
+
+	var tailc Cell
+	if truncate && len(tail) > 0 {
+		if m == ansi.WcWidth {
+			tailc = *NewCellString(tail)
+		} else {
+			tailc = *NewGraphemeCell(tail)
+		}
+	}
+
+	decoder := ansi.DecodeSequenceWc[T]
+	if m == ansi.GraphemeWidth {
+		decoder = ansi.DecodeSequence[T]
+	}
+
+	var cell Cell
+	var style Style
+	var link Link
+	var state byte
+	for len(str) > 0 {
+		seq, width, n, newState := decoder(str, state, p)
+
+		switch width {
+		case 1, 2, 3, 4: // wide cells can go up to 4 cells wide
+			cell.Width += width
+			cell.Append([]rune(string(seq))...)
+
+			if !truncate && x+cell.Width > bounds.Max.X && y+1 < bounds.Max.Y {
+				// Wrap the string to the width of the window
+				x = bounds.Min.X
+				y++
+			}
+			if Pos(x, y).In(bounds) {
+				if truncate && tailc.Width > 0 && x+cell.Width > bounds.Max.X-tailc.Width {
+					// Truncate the string and append the tail if any.
+					cell := tailc
+					cell.Style = style
+					cell.Link = link
+					s.SetCell(x, y, &cell)
+					x += tailc.Width
+				} else {
+					// Print the cell to the screen
+					cell.Style = style
+					cell.Link = link
+					s.SetCell(x, y, &cell) //nolint:errcheck
+					x += width
+				}
+			}
+
+			// String is too long for the line, truncate it.
+			// Make sure we reset the cell for the next iteration.
+			cell.Reset()
+		default:
+			// Valid sequences always have a non-zero Cmd.
+			// TODO: Handle cursor movement and other sequences
+			switch {
+			case ansi.HasCsiPrefix(seq) && p.Command() == 'm':
+				// SGR - Select Graphic Rendition
+				ReadStyle(p.Params(), &style)
+			case ansi.HasOscPrefix(seq) && p.Command() == 8:
+				// Hyperlinks
+				ReadLink(p.Data(), &link)
+			case ansi.Equal(seq, T("\n")):
+				y++
+			case ansi.Equal(seq, T("\r")):
+				x = bounds.Min.X
+			default:
+				cell.Append([]rune(string(seq))...)
+			}
+		}
+
+		// Advance the state and data
+		state = newState
+		str = str[n:]
+	}
+
+	// Make sure to set the last cell if it's not empty.
+	if !cell.Empty() {
+		s.SetCell(x, y, &cell) //nolint:errcheck
+		cell.Reset()
+	}
+}

vendor/github.com/charmbracelet/x/term/LICENSE

@@ -0,0 +1,21 @@
+MIT License
+
+Copyright (c) 2023 Charmbracelet, Inc.
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.

vendor/github.com/charmbracelet/x/term/term.go

@@ -0,0 +1,49 @@
+package term
+
+// State contains platform-specific state of a terminal.
+type State struct {
+	state
+}
+
+// IsTerminal returns whether the given file descriptor is a terminal.
+func IsTerminal(fd uintptr) bool {
+	return isTerminal(fd)
+}
+
+// MakeRaw puts the terminal connected to the given file descriptor into raw
+// mode and returns the previous state of the terminal so that it can be
+// restored.
+func MakeRaw(fd uintptr) (*State, error) {
+	return makeRaw(fd)
+}
+
+// GetState returns the current state of a terminal which may be useful to
+// restore the terminal after a signal.
+func GetState(fd uintptr) (*State, error) {
+	return getState(fd)
+}
+
+// SetState sets the given state of the terminal.
+func SetState(fd uintptr, state *State) error {
+	return setState(fd, state)
+}
+
+// Restore restores the terminal connected to the given file descriptor to a
+// previous state.
+func Restore(fd uintptr, oldState *State) error {
+	return restore(fd, oldState)
+}
+
+// GetSize returns the visible dimensions of the given terminal.
+//
+// These dimensions don't include any scrollback buffer height.
+func GetSize(fd uintptr) (width, height int, err error) {
+	return getSize(fd)
+}
+
+// ReadPassword reads a line of input from a terminal without local echo.  This
+// is commonly used for inputting passwords and other sensitive data. The slice
+// returned does not include the \n.
+func ReadPassword(fd uintptr) ([]byte, error) {
+	return readPassword(fd)
+}

vendor/github.com/charmbracelet/x/term/term_other.go

@@ -0,0 +1,39 @@
+//go:build !aix && !darwin && !dragonfly && !freebsd && !linux && !netbsd && !openbsd && !zos && !windows && !solaris && !plan9
+// +build !aix,!darwin,!dragonfly,!freebsd,!linux,!netbsd,!openbsd,!zos,!windows,!solaris,!plan9
+
+package term
+
+import (
+	"fmt"
+	"runtime"
+)
+
+type state struct{}
+
+func isTerminal(fd uintptr) bool {
+	return false
+}
+
+func makeRaw(fd uintptr) (*State, error) {
+	return nil, fmt.Errorf("terminal: MakeRaw not implemented on %s/%s", runtime.GOOS, runtime.GOARCH)
+}
+
+func getState(fd uintptr) (*State, error) {
+	return nil, fmt.Errorf("terminal: GetState not implemented on %s/%s", runtime.GOOS, runtime.GOARCH)
+}
+
+func restore(fd uintptr, state *State) error {
+	return fmt.Errorf("terminal: Restore not implemented on %s/%s", runtime.GOOS, runtime.GOARCH)
+}
+
+func getSize(fd uintptr) (width, height int, err error) {
+	return 0, 0, fmt.Errorf("terminal: GetSize not implemented on %s/%s", runtime.GOOS, runtime.GOARCH)
+}
+
+func setState(fd uintptr, state *State) error {
+	return fmt.Errorf("terminal: SetState not implemented on %s/%s", runtime.GOOS, runtime.GOARCH)
+}
+
+func readPassword(fd uintptr) ([]byte, error) {
+	return nil, fmt.Errorf("terminal: ReadPassword not implemented on %s/%s", runtime.GOOS, runtime.GOARCH)
+}

vendor/github.com/charmbracelet/x/term/term_unix.go

@@ -0,0 +1,96 @@
+//go:build aix || darwin || dragonfly || freebsd || linux || netbsd || openbsd || solaris || zos
+// +build aix darwin dragonfly freebsd linux netbsd openbsd solaris zos
+
+package term
+
+import (
+	"golang.org/x/sys/unix"
+)
+
+type state struct {
+	unix.Termios
+}
+
+func isTerminal(fd uintptr) bool {
+	_, err := unix.IoctlGetTermios(int(fd), ioctlReadTermios)
+	return err == nil
+}
+
+func makeRaw(fd uintptr) (*State, error) {
+	termios, err := unix.IoctlGetTermios(int(fd), ioctlReadTermios)
+	if err != nil {
+		return nil, err
+	}
+
+	oldState := State{state{Termios: *termios}}
+
+	// This attempts to replicate the behaviour documented for cfmakeraw in
+	// the termios(3) manpage.
+	termios.Iflag &^= unix.IGNBRK | unix.BRKINT | unix.PARMRK | unix.ISTRIP | unix.INLCR | unix.IGNCR | unix.ICRNL | unix.IXON
+	termios.Oflag &^= unix.OPOST
+	termios.Lflag &^= unix.ECHO | unix.ECHONL | unix.ICANON | unix.ISIG | unix.IEXTEN
+	termios.Cflag &^= unix.CSIZE | unix.PARENB
+	termios.Cflag |= unix.CS8
+	termios.Cc[unix.VMIN] = 1
+	termios.Cc[unix.VTIME] = 0
+	if err := unix.IoctlSetTermios(int(fd), ioctlWriteTermios, termios); err != nil {
+		return nil, err
+	}
+
+	return &oldState, nil
+}
+
+func setState(fd uintptr, state *State) error {
+	var termios *unix.Termios
+	if state != nil {
+		termios = &state.Termios
+	}
+	return unix.IoctlSetTermios(int(fd), ioctlWriteTermios, termios)
+}
+
+func getState(fd uintptr) (*State, error) {
+	termios, err := unix.IoctlGetTermios(int(fd), ioctlReadTermios)
+	if err != nil {
+		return nil, err
+	}
+
+	return &State{state{Termios: *termios}}, nil
+}
+
+func restore(fd uintptr, state *State) error {
+	return unix.IoctlSetTermios(int(fd), ioctlWriteTermios, &state.Termios)
+}
+
+func getSize(fd uintptr) (width, height int, err error) {
+	ws, err := unix.IoctlGetWinsize(int(fd), unix.TIOCGWINSZ)
+	if err != nil {
+		return 0, 0, err
+	}
+	return int(ws.Col), int(ws.Row), nil
+}
+
+// passwordReader is an io.Reader that reads from a specific file descriptor.
+type passwordReader int
+
+func (r passwordReader) Read(buf []byte) (int, error) {
+	return unix.Read(int(r), buf)
+}
+
+func readPassword(fd uintptr) ([]byte, error) {
+	termios, err := unix.IoctlGetTermios(int(fd), ioctlReadTermios)
+	if err != nil {
+		return nil, err
+	}
+
+	newState := *termios
+	newState.Lflag &^= unix.ECHO
+	newState.Lflag |= unix.ICANON | unix.ISIG
+	newState.Iflag |= unix.ICRNL
+	if err := unix.IoctlSetTermios(int(fd), ioctlWriteTermios, &newState); err != nil {
+		return nil, err
+	}
+
+	defer unix.IoctlSetTermios(int(fd), ioctlWriteTermios, termios)
+
+	return readPasswordLine(passwordReader(fd))
+}

vendor/github.com/charmbracelet/x/term/term_unix_bsd.go

@@ -0,0 +1,11 @@
+//go:build darwin || dragonfly || freebsd || netbsd || openbsd
+// +build darwin dragonfly freebsd netbsd openbsd
+
+package term
+
+import "golang.org/x/sys/unix"
+
+const (
+	ioctlReadTermios  = unix.TIOCGETA
+	ioctlWriteTermios = unix.TIOCSETA
+)

vendor/github.com/charmbracelet/x/term/term_unix_other.go

@@ -0,0 +1,11 @@
+//go:build aix || linux || solaris || zos
+// +build aix linux solaris zos
+
+package term
+
+import "golang.org/x/sys/unix"
+
+const (
+	ioctlReadTermios  = unix.TCGETS
+	ioctlWriteTermios = unix.TCSETS
+)

vendor/github.com/charmbracelet/x/term/term_windows.go

@@ -0,0 +1,87 @@
+//go:build windows
+// +build windows
+
+package term
+
+import (
+	"os"
+
+	"golang.org/x/sys/windows"
+)
+
+type state struct {
+	Mode uint32
+}
+
+func isTerminal(fd uintptr) bool {
+	var st uint32
+	err := windows.GetConsoleMode(windows.Handle(fd), &st)
+	return err == nil
+}
+
+func makeRaw(fd uintptr) (*State, error) {
+	var st uint32
+	if err := windows.GetConsoleMode(windows.Handle(fd), &st); err != nil {
+		return nil, err
+	}
+	raw := st &^ (windows.ENABLE_ECHO_INPUT | windows.ENABLE_PROCESSED_INPUT | windows.ENABLE_LINE_INPUT | windows.ENABLE_PROCESSED_OUTPUT)
+	raw |= windows.ENABLE_VIRTUAL_TERMINAL_INPUT
+	if err := windows.SetConsoleMode(windows.Handle(fd), raw); err != nil {
+		return nil, err
+	}
+	return &State{state{st}}, nil
+}
+
+func setState(fd uintptr, state *State) error {
+	var mode uint32
+	if state != nil {
+		mode = state.Mode
+	}
+	return windows.SetConsoleMode(windows.Handle(fd), mode)
+}
+
+func getState(fd uintptr) (*State, error) {
+	var st uint32
+	if err := windows.GetConsoleMode(windows.Handle(fd), &st); err != nil {
+		return nil, err
+	}
+	return &State{state{st}}, nil
+}
+
+func restore(fd uintptr, state *State) error {
+	return windows.SetConsoleMode(windows.Handle(fd), state.Mode)
+}
+
+func getSize(fd uintptr) (width, height int, err error) {
+	var info windows.ConsoleScreenBufferInfo
+	if err := windows.GetConsoleScreenBufferInfo(windows.Handle(fd), &info); err != nil {
+		return 0, 0, err
+	}
+	return int(info.Window.Right - info.Window.Left + 1), int(info.Window.Bottom - info.Window.Top + 1), nil
+}
+
+func readPassword(fd uintptr) ([]byte, error) {
+	var st uint32
+	if err := windows.GetConsoleMode(windows.Handle(fd), &st); err != nil {
+		return nil, err
+	}
+	old := st
+
+	st &^= (windows.ENABLE_ECHO_INPUT | windows.ENABLE_LINE_INPUT)
+	st |= (windows.ENABLE_PROCESSED_OUTPUT | windows.ENABLE_PROCESSED_INPUT)
+	if err := windows.SetConsoleMode(windows.Handle(fd), st); err != nil {
+		return nil, err
+	}
+
+	defer windows.SetConsoleMode(windows.Handle(fd), old)
+
+	var h windows.Handle
+	p, _ := windows.GetCurrentProcess()
+	if err := windows.DuplicateHandle(p, windows.Handle(fd), p, &h, 0, false, windows.DUPLICATE_SAME_ACCESS); err != nil {
+		return nil, err
+	}
+
+	f := os.NewFile(uintptr(h), "stdin")
+	defer f.Close()
+	return readPasswordLine(f)
+}

vendor/github.com/charmbracelet/x/term/terminal.go

@@ -0,0 +1,12 @@
+package term
+
+import (
+	"io"
+)
+
+// File represents a file that has a file descriptor and can be read from,
+// written to, and closed.
+type File interface {
+	io.ReadWriteCloser
+	Fd() uintptr
+}

vendor/github.com/charmbracelet/x/term/util.go

@@ -0,0 +1,47 @@
+package term
+
+import (
+	"io"
+	"runtime"
+)
+
+// readPasswordLine reads from reader until it finds \n or io.EOF.
+// The slice returned does not include the \n.
+// readPasswordLine also ignores any \r it finds.
+// Windows uses \r as end of line. So, on Windows, readPasswordLine
+// reads until it finds \r and ignores any \n it finds during processing.
+func readPasswordLine(reader io.Reader) ([]byte, error) {
+	var buf [1]byte
+	var ret []byte
+
+	for {
+		n, err := reader.Read(buf[:])
+		if n > 0 {
+			switch buf[0] {
+			case '\b':
+				if len(ret) > 0 {
+					ret = ret[:len(ret)-1]
+				}
+			case '\n':
+				if runtime.GOOS != "windows" {
+					return ret, nil
+				}
+				// otherwise ignore \n
+			case '\r':
+				if runtime.GOOS == "windows" {
+					return ret, nil
+				}
+				// otherwise ignore \r
+			default:
+				ret = append(ret, buf[0])
+			}
+			continue
+		}
+		if err != nil {
+			if err == io.EOF && len(ret) > 0 {
+				return ret, nil
+			}
+			return ret, err
+		}
+	}
+}