Add --preview-wrap-sign

CHANGELOG.md

@@ -32,6 +32,8 @@ CHANGELOG
   # In the preview window
   fzf --preview "printf '\e[4:3;58;2;255;0;0mRed curly underline\e[0m\n'"
   ```
+- Added `--preview-wrap-sign` to set a different wrap indicator for the preview
+  window
 - Added `alt-gutter` color option (#4602) (@hedgieinsocks)
 - Added fish completion support (#4605) (@lalvarezt)
 - zsh: Handle multi-line history selection (#4595) (@LangLangBart)

man/man1/fzf.1

@@ -919,6 +919,11 @@ Should be used with one of the following \fB\-\-preview\-window\fR options.
 .B * border\-bottom
 .br
 
+.TP
+.BI "\-\-preview\-wrap\-sign" =INDICATOR
+Indicator for wrapped lines in the preview window. If not set, the value of
+\fB\-\-wrap\-sign\fR is used.
+
 .TP
 .BI "\-\-preview\-label\-pos" [=N[:top|bottom]]
 Position of the border label on the border line of the preview window. Specify

shell/completion.bash

@@ -219,6 +219,7 @@ _fzf_opts_completion() {
     --with-shell
     --wrap
     --wrap-sign
+    --preview-wrap-sign
     --zsh
     -0 --exit-0
     -1 --select-1

src/options.go

@@ -167,6 +167,7 @@ Usage: fzf [options]
     --preview-label=LABEL
     --preview-label-pos=N    Same as --border-label and --border-label-pos,
                              but for preview window
+    --preview-wrap-sign=STR  Indicator for wrapped lines in the preview window
 
   HEADER
     --header=STR             String to print as header
@@ -608,6 +609,7 @@ type Options struct {
 	Wrap              bool
 	WrapWord          bool
 	WrapSign          *string
+	PreviewWrapSign   *string
 	MultiLine         bool
 	CursorLine        bool
 	KeepRight         bool
@@ -3113,6 +3115,12 @@ func parseOptions(index *int, opts *Options, allArgs []string) error {
 			if opts.Preview.border, err = parseBorder(arg, !hasArg); err != nil {
 				return err
 			}
+		case "--preview-wrap-sign":
+			str, err := nextString("preview wrap sign required")
+			if err != nil {
+				return err
+			}
+			opts.PreviewWrapSign = &str
 		case "--height":
 			str, err := nextString("height required: [~]HEIGHT[%]")
 			if err != nil {

src/options_test.go

@@ -464,6 +464,50 @@ func TestPreviewOpts(t *testing.T) {
 	}
 }
 
+func TestPreviewWrapSign(t *testing.T) {
+	// Default: no preview wrap sign override
+	opts := optsFor()
+	if opts.PreviewWrapSign != nil {
+		t.Errorf("expected nil PreviewWrapSign, got %v", *opts.PreviewWrapSign)
+	}
+
+	// --preview-wrap-sign sets PreviewWrapSign
+	opts = optsFor("--preview-wrap-sign", ">> ")
+	if opts.PreviewWrapSign == nil || *opts.PreviewWrapSign != ">> " {
+		t.Errorf("expected '>> ', got %v", opts.PreviewWrapSign)
+	}
+
+	// --preview-wrap-sign is independent of --wrap-sign
+	opts = optsFor("--wrap-sign", "| ", "--preview-wrap-sign", ">> ")
+	if opts.WrapSign == nil || *opts.WrapSign != "| " {
+		t.Errorf("expected WrapSign '| ', got %v", opts.WrapSign)
+	}
+	if opts.PreviewWrapSign == nil || *opts.PreviewWrapSign != ">> " {
+		t.Errorf("expected PreviewWrapSign '>> ', got %v", opts.PreviewWrapSign)
+	}
+
+	// --preview-wrap-sign without --wrap-sign
+	opts = optsFor("--preview-wrap-sign", "→ ")
+	if opts.WrapSign != nil {
+		t.Errorf("expected nil WrapSign, got %v", *opts.WrapSign)
+	}
+	if opts.PreviewWrapSign == nil || *opts.PreviewWrapSign != "→ " {
+		t.Errorf("expected PreviewWrapSign '→ ', got %v", opts.PreviewWrapSign)
+	}
+
+	// Last --preview-wrap-sign wins
+	opts = optsFor("--preview-wrap-sign", "A ", "--preview-wrap-sign", "B ")
+	if opts.PreviewWrapSign == nil || *opts.PreviewWrapSign != "B " {
+		t.Errorf("expected PreviewWrapSign 'B ', got %v", opts.PreviewWrapSign)
+	}
+
+	// Empty string is allowed
+	opts = optsFor("--preview-wrap-sign", "")
+	if opts.PreviewWrapSign == nil || *opts.PreviewWrapSign != "" {
+		t.Errorf("expected empty PreviewWrapSign, got %v", opts.PreviewWrapSign)
+	}
+}
+
 func TestAdditiveExpect(t *testing.T) {
 	opts := optsFor("--expect=a", "--expect", "b", "--expect=c")
 	if len(opts.Expect) != 3 {

src/terminal.go

@@ -253,6 +253,8 @@ type Terminal struct {
 	wrapWord             bool
 	wrapSign             string
 	wrapSignWidth        int
+	previewWrapSign      string
+	previewWrapSignWidth int
 	ghost                string
 	separator            labelPrinter
 	separatorLen         int
@@ -1251,6 +1253,11 @@ func NewTerminal(opts *Options, eventBox *util.EventBox, executor *util.Executor
 		t.wrapSign = *opts.WrapSign
 	}
 	t.wrapSign, t.wrapSignWidth = t.processTabsStr(t.wrapSign, 0)
+	t.previewWrapSign = t.wrapSign
+	t.previewWrapSignWidth = t.wrapSignWidth
+	if opts.PreviewWrapSign != nil {
+		t.previewWrapSign, t.previewWrapSignWidth = t.processTabsStr(*opts.PreviewWrapSign, 0)
+	}
 	if opts.Scrollbar == nil {
 		if t.unicode && t.borderWidth == 1 {
 			t.scrollbar = "│"
@@ -2312,7 +2319,7 @@ func (t *Terminal) resizeWindows(forcePreview bool, redrawBorder bool) {
 					pwidth -= 1
 				}
 				t.pwindow = t.tui.NewWindow(y, x, pwidth, pheight, tui.WindowPreview, noBorder, true)
-				t.pwindow.SetWrapSign(t.wrapSign, t.wrapSignWidth)
+				t.pwindow.SetWrapSign(t.previewWrapSign, t.previewWrapSignWidth)
 				if !hadPreviewWindow {
 					t.pwindow.Erase()
 				}
@@ -4130,14 +4137,14 @@ func (t *Terminal) previewLineHeight(line string, maxWidth int) int {
 	// For word-wrap mode, count the sub-lines produced by word wrapping.
 	// Each sub-line may still char-wrap if it contains a word longer than the width.
 	if t.activePreviewOpts.wrapWord {
-		subLines := t.wordWrapAnsiLine(line, maxWidth, t.wrapSignWidth)
+		subLines := t.wordWrapAnsiLine(line, maxWidth, t.previewWrapSignWidth)
 		total := 0
 		for i, sub := range subLines {
 			prefixWidth := 0
 			cols := maxWidth
 			if i > 0 {
-				prefixWidth = t.wrapSignWidth
-				cols -= t.wrapSignWidth
+				prefixWidth = t.previewWrapSignWidth
+				cols -= t.previewWrapSignWidth
 			}
 			w := t.ansiLineWidth(sub, prefixWidth)
 			if cols <= 0 {
@@ -4154,7 +4161,7 @@ func (t *Terminal) previewLineHeight(line string, maxWidth int) int {
 		return 1
 	}
 	remaining := w - maxWidth
-	contWidth := max(1, maxWidth-t.wrapSignWidth)
+	contWidth := max(1, maxWidth-t.previewWrapSignWidth)
 	return 1 + (remaining+contWidth-1)/contWidth
 }
 
@@ -4333,7 +4340,7 @@ Loop:
 			// Pre-split line into sub-lines for word wrapping
 			var subLines []string
 			if t.activePreviewOpts.wrapWord {
-				subLines = t.wordWrapAnsiLine(line, maxWidth, t.wrapSignWidth)
+				subLines = t.wordWrapAnsiLine(line, maxWidth, t.previewWrapSignWidth)
 			} else {
 				subLines = []string{line}
 			}
@@ -4341,7 +4348,7 @@ Loop:
 			var fillRet tui.FillReturn
 			wrap := t.activePreviewOpts.wrap
 			printWrapSign := func() {
-				if t.pwindow.CFill(tui.ColPreview.Fg(), tui.ColPreview.Bg(), -1, tui.Dim, t.wrapSign) == tui.FillNextLine {
+				if t.pwindow.CFill(tui.ColPreview.Fg(), tui.ColPreview.Bg(), -1, tui.Dim, t.previewWrapSign) == tui.FillNextLine {
 					t.pwindow.Move(t.pwindow.Y()-1, t.pwindow.Width())
 				}
 				fillRet = tui.FillContinue