Use shaper.Shape() and shaper.Bitmaps() to draw glyphs directly (no double-shaping)

Co-authored-by: Qwen-Coder <qwen-coder@alibabacloud.com>

internal/ui/render.go

@@ -2,10 +2,13 @@ package ui
 
 import (
 	"image"
+	"image/color"
 
+	"gioui.org/f32"
 	"gioui.org/layout"
 	"gioui.org/op"
 	"gioui.org/op/clip"
+	"gioui.org/op/paint"
 	"gioui.org/text"
 	"gioui.org/unit"
 	"gioui.org/widget/material"
@@ -107,10 +110,8 @@ func (r *Renderer) drawStatusBar(gtx layout.Context, sb StatusBar) {
 		}
 	}
 
-	// Position filename at (reg.X + 8, filenameLineY)
-	call1 := op.Offset(image.Point{X: int(reg.X + unit.Dp(8)), Y: int(filenameLineY)}).Push(gtx.Ops)
-	material.Label(th, r.theme.FontSize, displayFilename).Layout(gtx)
-	call1.Pop()
+	// Position filename at (reg.X + 8, filenameLineY) - draw using shaper to avoid double-shaping
+	r.drawText(gtx, th.Shaper, displayFilename, r.theme.FontSize, reg.X+unit.Dp(8), filenameLineY, color.NRGBA{R: 0, G: 0, B: 0, A: 255})
 
 	// Line 2: Icons
 	iconsLineY := filenameLineY + filenameLineH
@@ -120,21 +121,15 @@ func (r *Renderer) drawStatusBar(gtx layout.Context, sb StatusBar) {
 	iconY := iconsLineY
 
 	if sb.CutCopy {
-		call := op.Offset(image.Point{X: int(leftX), Y: int(iconY)}).Push(gtx.Ops)
-		material.Label(th, r.theme.FontSize, "✂").Layout(gtx)
-		call.Pop()
+		r.drawText(gtx, th.Shaper, "✂", r.theme.FontSize, leftX, iconY, color.NRGBA{R: 0, G: 0, B: 0, A: 255})
 		leftX += unit.Dp(36)
 	}
 	if sb.Copy {
-		call := op.Offset(image.Point{X: int(leftX), Y: int(iconY)}).Push(gtx.Ops)
-		material.Label(th, r.theme.FontSize, "⎘").Layout(gtx)
-		call.Pop()
+		r.drawText(gtx, th.Shaper, "⎘", r.theme.FontSize, leftX, iconY, color.NRGBA{R: 0, G: 0, B: 0, A: 255})
 		leftX += unit.Dp(36)
 	}
 	if sb.Paste {
-		call := op.Offset(image.Point{X: int(leftX), Y: int(iconY)}).Push(gtx.Ops)
-		material.Label(th, r.theme.FontSize, "⎘").Layout(gtx)
-		call.Pop()
+		r.drawText(gtx, th.Shaper, "⎘", r.theme.FontSize, leftX, iconY, color.NRGBA{R: 0, G: 0, B: 0, A: 255})
 		leftX += unit.Dp(36)
 	}
 
@@ -142,15 +137,11 @@ func (r *Renderer) drawStatusBar(gtx layout.Context, sb StatusBar) {
 	rightX := reg.X + reg.W - unit.Dp(8)
 	if sb.Search {
 		rightX -= unit.Dp(36)
-		call := op.Offset(image.Point{X: int(rightX), Y: int(iconY)}).Push(gtx.Ops)
-		material.Label(th, r.theme.FontSize, "🔍").Layout(gtx)
-		call.Pop()
+		r.drawText(gtx, th.Shaper, "🔍", r.theme.FontSize, rightX, iconY, color.NRGBA{R: 0, G: 0, B: 0, A: 255})
 	}
 	if sb.ConflictIcon {
 		rightX -= unit.Dp(36)
-		call := op.Offset(image.Point{X: int(rightX), Y: int(iconY)}).Push(gtx.Ops)
-		material.Label(th, r.theme.FontSize, "⚠").Layout(gtx)
-		call.Pop()
+		r.drawText(gtx, th.Shaper, "⚠", r.theme.FontSize, rightX, iconY, color.NRGBA{R: 0, G: 0, B: 0, A: 255})
 	}
 
 	c.Pop()
@@ -205,6 +196,48 @@ func boolToString(b bool) string {
 	return "Off"
 }
 
+// drawText draws text using the same approach as Gio's textView:
+// layout text, iterate glyphs, buffer into lines, and draw using shaper.Shape().
+func (r *Renderer) drawText(gtx layout.Context, shp *text.Shaper, str string, size unit.Sp, x, y unit.Dp, col color.NRGBA) {
+	// Layout text
+	shp.LayoutString(text.Parameters{PxPerEm: fixed.I(gtx.Sp(size))}, str)
+
+	// Draw glyphs using the same approach as Gio's textView
+	var glyphs [32]text.Glyph
+	line := glyphs[:0]
+	for g, ok := shp.NextGlyph(); ok; g, ok = shp.NextGlyph() {
+		line = append(line, g)
+		if g.Flags&text.FlagLineBreak != 0 || cap(line)-len(line) == 0 {
+			r.drawLine(gtx, shp, line, x, y, col)
+			line = line[:0]
+		}
+	}
+	if len(line) > 0 {
+		r.drawLine(gtx, shp, line, x, y, col)
+	}
+}
+
+// drawLine draws a line of glyphs using shaper.Shape() and shaper.Bitmaps().
+func (r *Renderer) drawLine(gtx layout.Context, shp *text.Shaper, line []text.Glyph, x, y unit.Dp, col color.NRGBA) {
+	// Apply offset transform
+	off := f32.Point{X: float32(x), Y: float32(y)}
+	t := op.Affine(f32.Affine2D{}.Offset(off)).Push(gtx.Ops)
+
+	// Draw vector glyphs
+	path := shp.Shape(line)
+	outline := clip.Outline{Path: path}.Op().Push(gtx.Ops)
+	paint.ColorOp{Color: col}.Add(gtx.Ops)
+	paint.PaintOp{}.Add(gtx.Ops)
+	outline.Pop()
+
+	// Draw bitmap glyphs (emoji, etc.)
+	if call := shp.Bitmaps(line); call != (op.CallOp{}) {
+		call.Add(gtx.Ops)
+	}
+
+	t.Pop()
+}
+
 // charWidths returns the cumulative width after each rune in str.
 func charWidths(gtx layout.Context, shp *text.Shaper, str string, size unit.Sp) []int {
 	// Match Gio's textView: PxPerEm = font size in device pixels