add damage tracking to vt

vt/csi_mode.go

@@ -44,7 +44,7 @@
 		e.scr = &e.scrs[1]
 		e.scrs[1].cur = e.scrs[0].cur
 		e.scr.Clear()
-		e.scr.buf.Touched = nil
+		e.scr.ClearTouched()
 		e.setCursor(0, 0)
 	} else {
 		e.scr = &e.scrs[0]
@@ -72,17 +72,17 @@
 	e.logf("setting mode %T(%v) to %v", mode, mode, setting)
 	e.modes[mode] = setting
 	switch mode {
 	case ansi.TextCursorEnableMode:
 		e.scr.setCursorHidden(!setting.IsSet())
 	case ansi.AltScreenMode:
 		e.setAltScreenMode(setting.IsSet())
 	case ansi.SaveCursorMode:
 		if setting.IsSet() {
 			e.saveCursor()
 		} else {
 			e.restoreCursor()
 		}
 	case ansi.AltScreenSaveCursorMode: // Alternate Screen Save Cursor (1047 & 1048)
 		// Save primary screen cursor position
 		// Switch to alternate screen
 		// Doesn't support scrollback
@@ -90,7 +90,7 @@
 			e.saveCursor()
 		}
 		e.setAltScreenMode(setting.IsSet())
 	case ansi.InBandResizeMode:
 		if setting.IsSet() {
 			_, _ = io.WriteString(e.pw, ansi.InBandResize(e.Height(), e.Width(), 0, 0))
 		}

vt/go.mod

@@ -3,25 +3,25 @@ module github.com/charmbracelet/x/vt
 go 1.24.2
 
 require (
-	github.com/charmbracelet/ultraviolet v0.0.0-20251106193841-7889546fc720
+	github.com/charmbracelet/ultraviolet v0.0.0-20260303162955-0b88c25f3fff
 	github.com/charmbracelet/x/ansi v0.11.6
 	github.com/charmbracelet/x/exp/ordered v0.1.0
 )
 
 require (
-	github.com/charmbracelet/colorprofile v0.3.3 // indirect
+	github.com/charmbracelet/colorprofile v0.4.2 // indirect
 	github.com/charmbracelet/x/term v0.2.2 // indirect
 	github.com/charmbracelet/x/termios v0.1.1 // indirect
 	github.com/charmbracelet/x/windows v0.2.2 // indirect
 	github.com/clipperhouse/displaywidth v0.9.0 // indirect
 	github.com/clipperhouse/stringish v0.1.1 // indirect
-	github.com/clipperhouse/uax29/v2 v2.5.0 // indirect
+	github.com/clipperhouse/uax29/v2 v2.7.0 // indirect
 	github.com/lucasb-eyer/go-colorful v1.3.0 // indirect
 	github.com/mattn/go-runewidth v0.0.19 // indirect
 	github.com/muesli/cancelreader v0.2.2 // indirect
 	github.com/rivo/uniseg v0.4.7 // indirect
 	github.com/xo/terminfo v0.0.0-20220910002029-abceb7e1c41e // indirect
 	golang.org/x/exp v0.0.0-20231006140011-7918f672742d // indirect
-	golang.org/x/sync v0.17.0 // indirect
-	golang.org/x/sys v0.37.0 // indirect
+	golang.org/x/sync v0.19.0 // indirect
+	golang.org/x/sys v0.41.0 // indirect
 )

vt/go.sum

@@ -1,7 +1,11 @@
 github.com/charmbracelet/colorprofile v0.3.3 h1:DjJzJtLP6/NZ8p7Cgjno0CKGr7wwRJGxWUwh2IyhfAI=
 github.com/charmbracelet/colorprofile v0.3.3/go.mod h1:nB1FugsAbzq284eJcjfah2nhdSLppN2NqvfotkfRYP4=
+github.com/charmbracelet/colorprofile v0.4.2 h1:BdSNuMjRbotnxHSfxy+PCSa4xAmz7szw70ktAtWRYrY=
+github.com/charmbracelet/colorprofile v0.4.2/go.mod h1:0rTi81QpwDElInthtrQ6Ni7cG0sDtwAd4C4le060fT8=
 github.com/charmbracelet/ultraviolet v0.0.0-20251106193841-7889546fc720 h1:Pny/vp+ySKst82CWEME1oP6YEFs/17tlH+QOjqW7VUY=
 github.com/charmbracelet/ultraviolet v0.0.0-20251106193841-7889546fc720/go.mod h1:Y8B4DzWeTb0ama8l3+KyopZtkE8fZjwRQ3aEAPEXHE0=
+github.com/charmbracelet/ultraviolet v0.0.0-20260303162955-0b88c25f3fff h1:uY7A6hTokHPJBHfq7rj9Y/wm+IAjOghZTxKfVW6QLvw=
+github.com/charmbracelet/ultraviolet v0.0.0-20260303162955-0b88c25f3fff/go.mod h1:E6/0abq9uG2SnM8IbLB9Y5SW09uIgfaFETk8aRzgXUQ=
 github.com/charmbracelet/x/ansi v0.11.6 h1:GhV21SiDz/45W9AnV2R61xZMRri5NlLnl6CVF7ihZW8=
 github.com/charmbracelet/x/ansi v0.11.6/go.mod h1:2JNYLgQUsyqaiLovhU2Rv/pb8r6ydXKS3NIttu3VGZQ=
 github.com/charmbracelet/x/exp/ordered v0.1.0 h1:55/qLwjIh0gL0Vni+QAWk7T/qRVP6sBf+2agPBgnOFE=
@@ -18,6 +22,8 @@ github.com/clipperhouse/stringish v0.1.1 h1:+NSqMOr3GR6k1FdRhhnXrLfztGzuG+VuFDfa
 github.com/clipperhouse/stringish v0.1.1/go.mod h1:v/WhFtE1q0ovMta2+m+UbpZ+2/HEXNWYXQgCt4hdOzA=
 github.com/clipperhouse/uax29/v2 v2.5.0 h1:x7T0T4eTHDONxFJsL94uKNKPHrclyFI0lm7+w94cO8U=
 github.com/clipperhouse/uax29/v2 v2.5.0/go.mod h1:Wn1g7MK6OoeDT0vL+Q0SQLDz/KpfsVRgg6W7ihQeh4g=
+github.com/clipperhouse/uax29/v2 v2.7.0 h1:+gs4oBZ2gPfVrKPthwbMzWZDaAFPGYK72F0NJv2v7Vk=
+github.com/clipperhouse/uax29/v2 v2.7.0/go.mod h1:EFJ2TJMRUaplDxHKj1qAEhCtQPW2tJSwu5BF98AuoVM=
 github.com/lucasb-eyer/go-colorful v1.3.0 h1:2/yBRLdWBZKrf7gB40FoiKfAWYQ0lqNcbuQwVHXptag=
 github.com/lucasb-eyer/go-colorful v1.3.0/go.mod h1:R4dSotOR9KMtayYi1e77YzuveK+i7ruzyGqttikkLy0=
 github.com/mattn/go-runewidth v0.0.19 h1:v++JhqYnZuu5jSKrk9RbgF5v4CGUjqRfBm05byFGLdw=
@@ -32,5 +38,9 @@ golang.org/x/exp v0.0.0-20231006140011-7918f672742d h1:jtJma62tbqLibJ5sFQz8bKtEM
 golang.org/x/exp v0.0.0-20231006140011-7918f672742d/go.mod h1:ldy0pHrwJyGW56pPQzzkH36rKxoZW1tw7ZJpeKx+hdo=
 golang.org/x/sync v0.17.0 h1:l60nONMj9l5drqw6jlhIELNv9I0A4OFgRsG9k2oT9Ug=
 golang.org/x/sync v0.17.0/go.mod h1:9KTHXmSnoGruLpwFjVSX0lNNA75CykiMECbovNTZqGI=
+golang.org/x/sync v0.19.0 h1:vV+1eWNmZ5geRlYjzm2adRgW2/mcpevXNg50YZtPCE4=
+golang.org/x/sync v0.19.0/go.mod h1:9KTHXmSnoGruLpwFjVSX0lNNA75CykiMECbovNTZqGI=
 golang.org/x/sys v0.37.0 h1:fdNQudmxPjkdUTPnLn5mdQv7Zwvbvpaxqs831goi9kQ=
 golang.org/x/sys v0.37.0/go.mod h1:OgkHotnGiDImocRcuBABYBEXf8A9a87e/uXjp9XT3ks=
+golang.org/x/sys v0.41.0 h1:Ivj+2Cp/ylzLiEU89QhWblYnOE9zerudt9Ftecq2C6k=
+golang.org/x/sys v0.41.0/go.mod h1:OgkHotnGiDImocRcuBABYBEXf8A9a87e/uXjp9XT3ks=

vt/screen.go

@@ -10,7 +10,7 @@ type Screen struct {
 	// cb is the callbacks struct to use.
 	cb *Callbacks
 	// The buffer of the screen.
-	buf uv.Buffer
+	buf *uv.RenderBuffer
 	// The cur of the screen.
 	cur, saved Cursor
 	// scroll is the scroll region.
@@ -19,8 +19,10 @@ type Screen struct {
 
 // NewScreen creates a new screen.
 func NewScreen(w, h int) *Screen {
-	s := Screen{}
-	s.Resize(w, h)
+	s := Screen{
+		buf: uv.NewRenderBuffer(w, h),
+	}
+	s.scroll = s.buf.Bounds()
 	return &s
 }
 
@@ -32,6 +34,7 @@ func (s *Screen) Reset() {
 	s.cur = Cursor{}
 	s.saved = Cursor{}
 	s.scroll = s.buf.Bounds()
+	s.buf.Touched = nil
 }
 
 // Bounds returns the bounds of the screen.
@@ -44,6 +47,11 @@ func (s *Screen) Touched() []*uv.LineData {
 	return s.buf.Touched
 }
 
+// ClearTouched clears the touched state.
+func (s *Screen) ClearTouched() {
+	s.buf.Touched = nil
+}
+
 // CellAt returns the cell at the given x, y position.
 func (s *Screen) CellAt(x int, y int) *uv.Cell {
 	return s.buf.CellAt(x, y)
@@ -61,7 +69,12 @@ func (s *Screen) Height() int {
 
 // Resize resizes the screen.
 func (s *Screen) Resize(width int, height int) {
-	s.buf.Resize(width, height)
+	if s.buf == nil {
+		s.buf = uv.NewRenderBuffer(width, height)
+	} else {
+		s.buf.Resize(width, height)
+		s.buf.Touched = nil
+	}
 	s.scroll = s.buf.Bounds()
 }
 
@@ -78,6 +91,7 @@ func (s *Screen) Clear() {
 // ClearArea clears the given area.
 func (s *Screen) ClearArea(area uv.Rectangle) {
 	s.buf.ClearArea(area)
+	s.touchArea(area)
 }
 
 // Fill fills the screen or part of it.
@@ -88,6 +102,7 @@ func (s *Screen) Fill(c *uv.Cell) {
 // FillArea fills the given area with the given cell.
 func (s *Screen) FillArea(c *uv.Cell, area uv.Rectangle) {
 	s.buf.FillArea(c, area)
+	s.touchArea(area)
 }
 
 // setHorizontalMargins sets the horizontal margins.
@@ -327,3 +342,10 @@ func (s *Screen) blankCell() *uv.Cell {
 	c.Style.Bg = s.cur.Pen.Bg
 	return &c
 }
+
+// touchArea marks all lines in the given area as touched.
+func (s *Screen) touchArea(area uv.Rectangle) {
+	for y := area.Min.Y; y < area.Max.Y; y++ {
+		s.buf.TouchLine(area.Min.X, y, area.Max.X-area.Min.X)
+	}
+}