Support custom separator of inline info

Close #2030
Close #3084

5 files changed, 43 insertions, 17 deletions

diff --git a/CHANGELOG.md b/CHANGELOG.md
index 6233f194..4bd358c7 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -3,6 +3,10 @@ CHANGELOG
 
 0.37.0
 ------
+- Added a way to customize the separator of inline info
+  ```sh
+  fzf --info 'inline: ╱ ' --prompt '╱ ' --color prompt:bright-yellow
+  ```
 - New event
     - `focus` - Triggered when the focus changes due to a vertical cursor
       movement or a search result update
diff --git a/man/man1/fzf.1 b/man/man1/fzf.1
index a2e8c41f..8329fd51 100644
--- a/man/man1/fzf.1
+++ b/man/man1/fzf.1
@@ -337,11 +337,13 @@ e.g.
 Determines the display style of finder info (match counters).
 
 .br
-.BR default "       Display on the next line to the prompt"
+.BR default "          Display on the next line to the prompt"
 .br
-.BR inline "        Display on the same line"
+.BR inline "           Display on the same line with the default separator ' < '"
 .br
-.BR hidden "        Do not display finder info"
+.BR inline:SEPARATOR " Display on the same line with a non-default separator"
+.br
+.BR hidden "           Do not display finder info"
 .br
 
 .TP
diff --git a/src/options.go b/src/options.go
index 393f5804..deff0c8d 100644
--- a/src/options.go
+++ b/src/options.go
@@ -70,7 +70,7 @@ const usage = `usage: fzf [options]
                            (default: 0 or center)
     --margin=MARGIN        Screen margin (TRBL | TB,RL | T,RL,B | T,R,B,L)
     --padding=PADDING      Padding inside border (TRBL | TB,RL | T,RL,B | T,R,B,L)
-    --info=STYLE           Finder info style [default|inline|hidden]
+    --info=STYLE           Finder info style [default|hidden|inline|inline:SEPARATOR]
     --separator=STR        String to form horizontal separator on info line
     --no-separator         Hide info line separator
     --scrollbar[=CHAR]     Scrollbar character
@@ -125,6 +125,8 @@ const usage = `usage: fzf [options]
 
 `
 
+const defaultInfoSep = " < "
+
 // Case denotes case-sensitivity of search
 type Case int
 
@@ -277,6 +279,7 @@ type Options struct {
 	ScrollOff    int
 	FileWord     bool
 	InfoStyle    infoStyle
+	InfoSep      string
 	Separator    *string
 	JumpLabels   string
 	Prompt       string
@@ -1319,18 +1322,22 @@ func parseLayout(str string) layoutType {
 	return layoutDefault
 }
 
-func parseInfoStyle(str string) infoStyle {
+func parseInfoStyle(str string) (infoStyle, string) {
 	switch str {
 	case "default":
-		return infoDefault
+		return infoDefault, ""
 	case "inline":
-		return infoInline
+		return infoInline, defaultInfoSep
 	case "hidden":
-		return infoHidden
+		return infoHidden, ""
 	default:
-		errorExit("invalid info style (expected: default|inline|hidden)")
+		prefix := "inline:"
+		if strings.HasPrefix(str, prefix) {
+			return infoInline, strings.ReplaceAll(str[len(prefix):], "\n", " ")
+		}
+		errorExit("invalid info style (expected: default|hidden|inline|inline:SEPARATOR)")
 	}
-	return infoDefault
+	return infoDefault, ""
 }
 
 func parsePreviewWindow(opts *previewOpts, input string) {
@@ -1598,12 +1605,13 @@ func parseOptions(opts *Options, allArgs []string) {
 		case "--no-filepath-word":
 			opts.FileWord = false
 		case "--info":
-			opts.InfoStyle = parseInfoStyle(
+			opts.InfoStyle, opts.InfoSep = parseInfoStyle(
 				nextString(allArgs, &i, "info style required"))
 		case "--no-info":
 			opts.InfoStyle = infoHidden
 		case "--inline-info":
 			opts.InfoStyle = infoInline
+			opts.InfoSep = defaultInfoSep
 		case "--no-inline-info":
 			opts.InfoStyle = infoDefault
 		case "--separator":
@@ -1788,7 +1796,7 @@ func parseOptions(opts *Options, allArgs []string) {
 			} else if match, value := optString(arg, "--layout="); match {
 				opts.Layout = parseLayout(value)
 			} else if match, value := optString(arg, "--info="); match {
-				opts.InfoStyle = parseInfoStyle(value)
+				opts.InfoStyle, opts.InfoSep = parseInfoStyle(value)
 			} else if match, value := optString(arg, "--separator="); match {
 				opts.Separator = &value
 			} else if match, value := optString(arg, "--scrollbar="); match {
diff --git a/src/terminal.go b/src/terminal.go
index 62e80431..b09c47dd 100644
--- a/src/terminal.go
+++ b/src/terminal.go
@@ -147,6 +147,7 @@ type labelPrinter func(tui.Window, int)
 type Terminal struct {
 	initDelay          time.Duration
 	infoStyle          infoStyle
+	infoSep            string
 	separator          labelPrinter
 	separatorLen       int
 	spinner            []string
@@ -579,6 +580,7 @@ func NewTerminal(opts *Options, eventBox *util.EventBox) *Terminal {
 	t := Terminal{
 		initDelay:          delay,
 		infoStyle:          opts.InfoStyle,
+		infoSep:            opts.InfoSep,
 		separator:          nil,
 		spinner:            makeSpinner(opts.Unicode),
 		queryLen:           [2]int{0, 0},
@@ -1393,16 +1395,21 @@ func (t *Terminal) printInfo() {
 		pos = 2
 	case infoInline:
 		pos = t.promptLen + t.queryLen[0] + t.queryLen[1] + 1
-		if pos+len(" < ") > t.window.Width() {
-			return
+		str := t.infoSep
+		maxWidth := t.window.Width() - pos
+		width := runewidth.StringWidth(str)
+		if width > maxWidth {
+			trimmed, _ := t.trimRight([]rune(str), maxWidth)
+			str = string(trimmed)
+			width = maxWidth
 		}
 		t.move(line, pos, t.separatorLen == 0)
 		if t.reading {
-			t.window.CPrint(tui.ColSpinner, " < ")
+			t.window.CPrint(tui.ColSpinner, str)
 		} else {
-			t.window.CPrint(tui.ColPrompt, " < ")
+			t.window.CPrint(tui.ColPrompt, str)
 		}
-		pos += len(" < ")
+		pos += width
 	case infoHidden:
 		return
 	}
diff --git a/test/test_go.rb b/test/test_go.rb
index 67207fb4..3dd63579 100755
--- a/test/test_go.rb
+++ b/test/test_go.rb
@@ -1587,6 +1587,11 @@ class TestGoFZF < TestBase
     tmux.until { |lines| assert_equal '> 1', lines[-2] }
   end
 
+  def test_info_inline_separator
+    tmux.send_keys 'seq 10 | fzf --info=inline:___ --no-separator', :Enter
+    tmux.until { |lines| assert_equal '>  ___10/10', lines[-1] }
+  end
+
   def test_change_first_last
     tmux.send_keys %(seq 1000 | #{FZF} --bind change:first,alt-Z:last), :Enter
     tmux.until { |lines| assert_equal 1000, lines.match_count }