Make search toggleable

- `--phony` renamed to `--disabled` for consistency
    - `--no-phony` is now `--enabled`
- Added `enable-search`, `disable-search`, and `toggle-search` actions
  for `--bind`
- Added `--color` options: `query` and `disabled`

Close #2303

4 files changed, 52 insertions, 12 deletions

diff --git a/src/core.go b/src/core.go
index ef470a80..1c009c69 100644
--- a/src/core.go
+++ b/src/core.go
@@ -237,14 +237,16 @@ func Run(opts *Options, version string, revision string) {
 		go reader.restart(command)
 	}
 	eventBox.Watch(EvtReadNew)
+	query := []rune{}
 	for {
 		delay := true
 		ticks++
 		input := func() []rune {
-			if opts.Phony {
-				return []rune{}
+			paused, input := terminal.Input()
+			if !paused {
+				query = input
 			}
-			return []rune(terminal.Input())
+			return query
 		}
 		eventBox.Wait(func(events *util.Events) {
 			if _, fin := (*events)[EvtReadFin]; fin {
diff --git a/src/options.go b/src/options.go
index 691934ed..12c09556 100644
--- a/src/options.go
+++ b/src/options.go
@@ -33,7 +33,7 @@ const usage = `usage: fzf [options]
     -d, --delimiter=STR   Field delimiter regex (default: AWK-style)
     +s, --no-sort         Do not sort the result
     --tac                 Reverse the order of the input
-    --phony               Do not perform search
+    --disabled            Do not perform search
     --tiebreak=CRI[,..]   Comma-separated list of sort criteria to apply
                           when the scores are tied [length|begin|end|index]
                           (default: length)
@@ -682,8 +682,10 @@ func parseTheme(defaultTheme *tui.ColorTheme, str string) *tui.ColorTheme {
 				}
 			}
 			switch components[0] {
-			case "input":
+			case "query", "input":
 				mergeAttr(&theme.Input)
+			case "disabled":
+				mergeAttr(&theme.Disabled)
 			case "fg":
 				mergeAttr(&theme.Fg)
 			case "bg":
@@ -875,6 +877,8 @@ func parseKeymap(keymap map[tui.Event][]action, str string) {
 				appendAction(actToggleOut)
 			case "toggle-all":
 				appendAction(actToggleAll)
+			case "toggle-search":
+				appendAction(actToggleSearch)
 			case "select-all":
 				appendAction(actSelectAll)
 			case "deselect-all":
@@ -923,6 +927,10 @@ func parseKeymap(keymap map[tui.Event][]action, str string) {
 				appendAction(actPreviewHalfPageUp)
 			case "preview-half-page-down":
 				appendAction(actPreviewHalfPageDown)
+			case "enable-search":
+				appendAction(actEnableSearch)
+			case "disable-search":
+				appendAction(actDisableSearch)
 			default:
 				t := isExecuteAction(specLower)
 				if t == actIgnore {
@@ -1199,9 +1207,9 @@ func parseOptions(opts *Options, allArgs []string) {
 			}
 		case "--no-expect":
 			opts.Expect = make(map[tui.Event]string)
-		case "--no-phony":
+		case "--enabled", "--no-phony":
 			opts.Phony = false
-		case "--phony":
+		case "--disabled", "--phony":
 			opts.Phony = true
 		case "--tiebreak":
 			opts.Criteria = parseTiebreak(nextString(allArgs, &i, "sort criterion required"))
diff --git a/src/terminal.go b/src/terminal.go
index e630db4e..48011628 100644
--- a/src/terminal.go
+++ b/src/terminal.go
@@ -125,6 +125,7 @@ type Terminal struct {
 	unicode      bool
 	borderShape  tui.BorderShape
 	cleanExit    bool
+	paused       bool
 	border       tui.Window
 	window       tui.Window
 	pborder      tui.Window
@@ -233,6 +234,7 @@ const (
 	actSelectAll
 	actDeselectAll
 	actToggle
+	actToggleSearch
 	actToggleAll
 	actToggleDown
 	actToggleUp
@@ -270,6 +272,8 @@ const (
 	actFirst
 	actLast
 	actReload
+	actDisableSearch
+	actEnableSearch
 )
 
 type placeholderFlags struct {
@@ -488,6 +492,7 @@ func NewTerminal(opts *Options, eventBox *util.EventBox) *Terminal {
 		unicode:     opts.Unicode,
 		borderShape: opts.BorderShape,
 		cleanExit:   opts.ClearOnExit,
+		paused:      opts.Phony,
 		strong:      strongAttr,
 		cycle:       opts.Cycle,
 		header:      header,
@@ -563,10 +568,10 @@ func (t *Terminal) noInfoLine() bool {
 }
 
 // Input returns current query string
-func (t *Terminal) Input() []rune {
+func (t *Terminal) Input() (bool, []rune) {
 	t.mutex.Lock()
 	defer t.mutex.Unlock()
-	return copySlice(t.input)
+	return t.paused, copySlice(t.input)
 }
 
 // UpdateCount updates the count information
@@ -925,8 +930,12 @@ func (t *Terminal) printPrompt() {
 	t.prompt()
 
 	before, after := t.updatePromptOffset()
-	t.window.CPrint(tui.ColInput, string(before))
-	t.window.CPrint(tui.ColInput, string(after))
+	color := tui.ColInput
+	if t.paused {
+		color = tui.ColDisabled
+	}
+	t.window.CPrint(color, string(before))
+	t.window.CPrint(color, string(after))
 }
 
 func (t *Terminal) trimMessage(message string, maxWidth int) string {
@@ -1880,7 +1889,8 @@ func (t *Terminal) Loop() {
 				version++
 				// We don't display preview window if no match
 				if items[0] != nil {
-					command := t.replacePlaceholder(commandTemplate, false, string(t.Input()), items)
+					_, query := t.Input()
+					command := t.replacePlaceholder(commandTemplate, false, string(query), items)
 					initialOffset := 0
 					cmd := util.ExecCommand(command, true)
 					if pwindow != nil {
@@ -2465,6 +2475,17 @@ func (t *Terminal) Loop() {
 					t.input = trimQuery(t.history.next())
 					t.cx = len(t.input)
 				}
+			case actToggleSearch:
+				t.paused = !t.paused
+				changed = !t.paused
+				req(reqPrompt)
+			case actEnableSearch:
+				t.paused = false
+				changed = true
+				req(reqPrompt)
+			case actDisableSearch:
+				t.paused = true
+				req(reqPrompt)
 			case actSigStop:
 				p, err := os.FindProcess(os.Getpid())
 				if err == nil {
diff --git a/src/tui/tui.go b/src/tui/tui.go
index cc9c7f67..eb09da40 100644
--- a/src/tui/tui.go
+++ b/src/tui/tui.go
@@ -250,6 +250,7 @@ func (p ColorPair) MergeNonDefault(other ColorPair) ColorPair {
 type ColorTheme struct {
 	Colored      bool
 	Input        ColorAttr
+	Disabled     ColorAttr
 	Fg           ColorAttr
 	Bg           ColorAttr
 	PreviewFg    ColorAttr
@@ -421,6 +422,7 @@ var (
 	ColPrompt               ColorPair
 	ColNormal               ColorPair
 	ColInput                ColorPair
+	ColDisabled             ColorPair
 	ColMatch                ColorPair
 	ColCursor               ColorPair
 	ColCursorEmpty          ColorPair
@@ -443,6 +445,7 @@ func EmptyTheme() *ColorTheme {
 	return &ColorTheme{
 		Colored:      true,
 		Input:        ColorAttr{colUndefined, AttrUndefined},
+		Disabled:     ColorAttr{colUndefined, AttrUndefined},
 		Fg:           ColorAttr{colUndefined, AttrUndefined},
 		Bg:           ColorAttr{colUndefined, AttrUndefined},
 		PreviewFg:    ColorAttr{colUndefined, AttrUndefined},
@@ -465,6 +468,7 @@ func NoColorTheme() *ColorTheme {
 	return &ColorTheme{
 		Colored:      false,
 		Input:        ColorAttr{colDefault, AttrRegular},
+		Disabled:     ColorAttr{colDefault, AttrRegular},
 		Fg:           ColorAttr{colDefault, AttrRegular},
 		Bg:           ColorAttr{colDefault, AttrRegular},
 		PreviewFg:    ColorAttr{colDefault, AttrRegular},
@@ -492,6 +496,7 @@ func init() {
 	Default16 = &ColorTheme{
 		Colored:      true,
 		Input:        ColorAttr{colDefault, AttrUndefined},
+		Disabled:     ColorAttr{colUndefined, AttrUndefined},
 		Fg:           ColorAttr{colDefault, AttrUndefined},
 		Bg:           ColorAttr{colDefault, AttrUndefined},
 		PreviewFg:    ColorAttr{colUndefined, AttrUndefined},
@@ -511,6 +516,7 @@ func init() {
 	Dark256 = &ColorTheme{
 		Colored:      true,
 		Input:        ColorAttr{colDefault, AttrUndefined},
+		Disabled:     ColorAttr{colUndefined, AttrUndefined},
 		Fg:           ColorAttr{colDefault, AttrUndefined},
 		Bg:           ColorAttr{colDefault, AttrUndefined},
 		PreviewFg:    ColorAttr{colUndefined, AttrUndefined},
@@ -530,6 +536,7 @@ func init() {
 	Light256 = &ColorTheme{
 		Colored:      true,
 		Input:        ColorAttr{colDefault, AttrUndefined},
+		Disabled:     ColorAttr{colUndefined, AttrUndefined},
 		Fg:           ColorAttr{colDefault, AttrUndefined},
 		Bg:           ColorAttr{colDefault, AttrUndefined},
 		PreviewFg:    ColorAttr{colUndefined, AttrUndefined},
@@ -564,6 +571,7 @@ func initTheme(theme *ColorTheme, baseTheme *ColorTheme, forceBlack bool) {
 		return c
 	}
 	theme.Input = o(baseTheme.Input, theme.Input)
+	theme.Disabled = o(theme.Input, o(baseTheme.Disabled, theme.Disabled))
 	theme.Fg = o(baseTheme.Fg, theme.Fg)
 	theme.Bg = o(baseTheme.Bg, theme.Bg)
 	theme.PreviewFg = o(theme.Fg, o(baseTheme.PreviewFg, theme.PreviewFg))
@@ -597,6 +605,7 @@ func initPalette(theme *ColorTheme) {
 	ColPrompt = pair(theme.Prompt, theme.Bg)
 	ColNormal = pair(theme.Fg, theme.Bg)
 	ColInput = pair(theme.Input, theme.Bg)
+	ColDisabled = pair(theme.Disabled, theme.Bg)
 	ColMatch = pair(theme.Match, theme.Bg)
 	ColCursor = pair(theme.Cursor, theme.Gutter)
 	ColCursorEmpty = pair(blank, theme.Gutter)