From c5fb0c43f9222e72ff00290162b68e34a8f0d5d7 Mon Sep 17 00:00:00 2001
From: Junegunn Choi <junegunn.c@gmail.com>
Date: Tue, 7 May 2024 01:33:42 +0900
Subject: [PATCH] Add --cursor-line to highlight the whole current line

Similar to 'set cursorline' of Vim.
---
 man/man1/fzf.1  |  3 +++
 src/options.go  |  6 ++++++
 src/terminal.go | 17 ++++++++++++++---
 3 files changed, 23 insertions(+), 3 deletions(-)

diff --git a/man/man1/fzf.1 b/man/man1/fzf.1
index dd2608fb..929b161e 100644
--- a/man/man1/fzf.1
+++ b/man/man1/fzf.1
@@ -534,6 +534,9 @@ color mappings.
          --color='pointer:#E12672,marker:#E17899,prompt:#98BEDE,hl+:#98BC99'\fR
 .RE
 .TP
+.B "--cursor-line"
+Highlight the whole current line
+.TP
 .B "--no-bold"
 Do not use bold text
 .TP
diff --git a/src/options.go b/src/options.go
index d7f2b476..fda51cba 100644
--- a/src/options.go
+++ b/src/options.go
@@ -92,6 +92,7 @@ const Usage = `usage: fzf [options]
     --ansi                 Enable processing of ANSI color codes
     --tabstop=SPACES       Number of spaces for a tab character (default: 8)
     --color=COLSPEC        Base scheme (dark|light|16|bw) and/or custom colors
+    --cursor-line          Highlight the whole current line
     --no-bold              Do not use bold text
 
   History
@@ -322,6 +323,7 @@ type Options struct {
 	MinHeight    int
 	Layout       layoutType
 	Cycle        bool
+	CursorLine   bool
 	KeepRight    bool
 	Hscroll      bool
 	HscrollOff   int
@@ -1948,6 +1950,10 @@ func parseOptions(opts *Options, allArgs []string) error {
 			opts.Layout = layoutDefault
 		case "--cycle":
 			opts.Cycle = true
+		case "--cursor-line":
+			opts.CursorLine = true
+		case "--no-cursor-line":
+			opts.CursorLine = false
 		case "--no-cycle":
 			opts.Cycle = false
 		case "--keep-right":
diff --git a/src/terminal.go b/src/terminal.go
index 18915035..c5f718a2 100644
--- a/src/terminal.go
+++ b/src/terminal.go
@@ -229,6 +229,7 @@ type Terminal struct {
 	printQuery         bool
 	history            *History
 	cycle              bool
+	cursorLine         bool
 	headerVisible      bool
 	headerFirst        bool
 	headerLines        int
@@ -754,6 +755,7 @@ func NewTerminal(opts *Options, eventBox *util.EventBox, executor *util.Executor
 		executor:           executor,
 		paused:             opts.Phony,
 		cycle:              opts.Cycle,
+		cursorLine:         opts.CursorLine,
 		headerVisible:      true,
 		headerFirst:        opts.HeaderFirst,
 		headerLines:        opts.HeaderLines,
@@ -1912,9 +1914,18 @@ func (t *Terminal) printItem(result Result, line int, i int, current bool, bar b
 		}
 		newLine.width = t.printHighlighted(result, tui.ColNormal, tui.ColMatch, false, true)
 	}
-	fillSpaces := prevLine.width - newLine.width
-	if fillSpaces > 0 {
-		t.window.Print(strings.Repeat(" ", fillSpaces))
+	if current && t.cursorLine {
+		maxWidth := t.window.Width() - (t.pointerLen + t.markerLen + 1)
+		fillSpaces := maxWidth - newLine.width
+		newLine.width = maxWidth
+		if fillSpaces > 0 {
+			t.window.CPrint(tui.ColCurrent, strings.Repeat(" ", fillSpaces))
+		}
+	} else {
+		fillSpaces := prevLine.width - newLine.width
+		if fillSpaces > 0 {
+			t.window.Print(strings.Repeat(" ", fillSpaces))
+		}
 	}
 	printBar()
 	t.prevLines[i] = newLine