Add --no-input to hide the input section (#4210)

Close #2890
Close #1396
 
You can't type in queries in this mode, and the only way to trigger an
fzf search is to use `search(...)` action.

  # Click header to trigger search
  fzf --header '[src] [test]' --no-input --layout reverse \
      --header-border bottom --input-border \
      --bind 'click-header:transform-search:echo ${FZF_CLICK_HEADER_WORD:1:-1}'

9 files changed, 126 insertions, 23 deletions

diff --git a/CHANGELOG.md b/CHANGELOG.md
index e4d51c75..c4250b42 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -28,6 +28,13 @@ CHANGELOG
   ```
     - `$FZF_KEY` was updated to expose the type of the click. e.g. `click`, `ctrl-click`, etc. You can use it to implement a more sophisticated behavior.
     - `kill` completion for bash and zsh were updated to use this feature
+- Added `--no-input` option to completely disable and hide the input section
+  ```sh
+  # Click header to trigger search
+  fzf --header '[src] [test]' --no-input --layout reverse \
+      --header-border bottom --input-border \
+      --bind 'click-header:transform-search:echo ${FZF_CLICK_HEADER_WORD:1:-1}'
+  ```
 - Extended `{q}` placeholder to support ranges. e.g. `{q:1}`, `{q:2..}`, etc.
 - Added `search(...)` and `transform-search(...)` action to trigger an fzf search with an arbitrary query string. This can be used to extend the search syntax of fzf. In the following example, fzf will use the first word of the query to trigger ripgrep search, and use the rest of the query to perform fzf search within the result.
   ```sh
diff --git a/man/man1/fzf.1 b/man/man1/fzf.1
index ad205920..3a8a107f 100644
--- a/man/man1/fzf.1
+++ b/man/man1/fzf.1
@@ -621,6 +621,11 @@ Position of the list label
 .SS INPUT SECTION
 
 .TP
+.B "\-\-no\-input"
+Disable and hide the input section. You can no longer type in queries. To
+trigger a search, use \fBsearch\fR action.
+
+.TP
 .BI "\-\-prompt=" "STR"
 Input prompt (default: '> ')
 .TP
diff --git a/src/options.go b/src/options.go
index cc627ee1..fec9596c 100644
--- a/src/options.go
+++ b/src/options.go
@@ -127,6 +127,7 @@ Usage: fzf [options]
                              (default: 0 or center)
 
   INPUT SECTION
+    --no-input               Disable and hide the input section
     --prompt=STR             Input prompt (default: '> ')
     --info=STYLE             Finder info style
                              [default|right|hidden|inline[-right][:PREFIX]]
@@ -538,6 +539,7 @@ type Options struct {
 	Scheme            string
 	Extended          bool
 	Phony             bool
+	Inputless         bool
 	Case              Case
 	Normalize         bool
 	Nth               []Range
@@ -659,6 +661,7 @@ func defaultOptions() *Options {
 		Scheme:       "", // Unknown
 		Extended:     true,
 		Phony:        false,
+		Inputless:    false,
 		Case:         CaseSmart,
 		Normalize:    true,
 		Nth:          make([]Range, 0),
@@ -2315,6 +2318,8 @@ func parseOptions(index *int, opts *Options, allArgs []string) error {
 			opts.Phony = false
 		case "--disabled", "--phony":
 			opts.Phony = true
+		case "--no-input":
+			opts.Inputless = true
 		case "--tiebreak":
 			str, err := nextString("sort criterion required")
 			if err != nil {
@@ -3064,6 +3069,9 @@ func noSeparatorLine(style infoStyle, separator bool) bool {
 }
 
 func (opts *Options) noSeparatorLine() bool {
+	if opts.Inputless {
+		return true
+	}
 	sep := opts.Separator == nil && !opts.InputBorderShape.Visible() || opts.Separator != nil && len(*opts.Separator) > 0
 	return noSeparatorLine(opts.InfoStyle, sep)
 }
@@ -3235,7 +3243,13 @@ func postProcessOptions(opts *Options) error {
 
 	// Sets --min-height automatically
 	if opts.Height.size > 0 && opts.Height.percent && opts.MinHeight < 0 {
-		opts.MinHeight = -opts.MinHeight + 1 + borderLines(opts.BorderShape) + borderLines(opts.ListBorderShape) + borderLines(opts.InputBorderShape)
+		opts.MinHeight = -opts.MinHeight + borderLines(opts.BorderShape) + borderLines(opts.ListBorderShape)
+		if !opts.Inputless {
+			opts.MinHeight += 1 + borderLines(opts.InputBorderShape)
+			if !opts.noSeparatorLine() {
+				opts.MinHeight++
+			}
+		}
 		if len(opts.Header) > 0 {
 			opts.MinHeight += borderLines(opts.HeaderBorderShape) + len(opts.Header)
 		}
@@ -3246,9 +3260,6 @@ func postProcessOptions(opts *Options) error {
 			}
 			opts.MinHeight += borderLines(borderShape) + opts.HeaderLines
 		}
-		if !opts.noSeparatorLine() {
-			opts.MinHeight++
-		}
 		if len(opts.Preview.command) > 0 && (opts.Preview.position == posUp || opts.Preview.position == posDown) && opts.Preview.Visible() && opts.Preview.position == posUp {
 			borderShape := opts.Preview.border
 			if opts.Preview.border == tui.BorderLine {
diff --git a/src/terminal.go b/src/terminal.go
index da3b863c..b63af45b 100644
--- a/src/terminal.go
+++ b/src/terminal.go
@@ -324,6 +324,7 @@ type Terminal struct {
 	cleanExit          bool
 	executor           *util.Executor
 	paused             bool
+	inputless          bool
 	border             tui.Window
 	window             tui.Window
 	inputWindow        tui.Window
@@ -810,6 +811,9 @@ func NewTerminal(opts *Options, eventBox *util.EventBox, executor *util.Executor
 	if err != nil {
 		return nil, err
 	}
+	if opts.Inputless {
+		renderer.HideCursor()
+	}
 	wordRubout := "[^\\pL\\pN][\\pL\\pN]"
 	wordNext := "[\\pL\\pN][^\\pL\\pN]|(.$)"
 	if opts.FileWord {
@@ -887,6 +891,7 @@ func NewTerminal(opts *Options, eventBox *util.EventBox, executor *util.Executor
 		cleanExit:          opts.ClearOnExit,
 		executor:           executor,
 		paused:             opts.Phony,
+		inputless:          opts.Inputless,
 		cycle:              opts.Cycle,
 		highlightLine:      opts.CursorLine,
 		headerVisible:      true,
@@ -1124,9 +1129,15 @@ func (t *Terminal) visibleHeaderLinesInList() int {
 
 // Extra number of lines needed to display fzf
 func (t *Terminal) extraLines() int {
-	extra := 1
-	if t.inputBorderShape.Visible() {
-		extra += borderLines(t.inputBorderShape)
+	extra := 0
+	if !t.inputless {
+		extra++
+		if !t.noSeparatorLine() {
+			extra++
+		}
+		if t.inputBorderShape.Visible() {
+			extra += borderLines(t.inputBorderShape)
+		}
 	}
 	if t.listBorderShape.Visible() {
 		extra += borderLines(t.listBorderShape)
@@ -1141,9 +1152,6 @@ func (t *Terminal) extraLines() int {
 		}
 		extra += t.headerLines
 	}
-	if !t.noSeparatorLine() {
-		extra++
-	}
 	return extra
 }
 
@@ -1265,7 +1273,7 @@ func (t *Terminal) parsePrompt(prompt string) (func(), int) {
 }
 
 func (t *Terminal) noSeparatorLine() bool {
-	return noSeparatorLine(t.infoStyle, t.separatorLen > 0)
+	return t.inputless || noSeparatorLine(t.infoStyle, t.separatorLen > 0)
 }
 
 func getScrollbar(perLine int, total int, height int, offset int) (int, int) {
@@ -1350,7 +1358,10 @@ func (t *Terminal) Input() (bool, []rune) {
 	t.mutex.Lock()
 	defer t.mutex.Unlock()
 	paused := t.paused
-	src := t.input
+	var src []rune
+	if !t.inputless {
+		src = t.input
+	}
 	if t.inputOverride != nil {
 		paused = false
 		src = *t.inputOverride
@@ -1635,8 +1646,11 @@ func (t *Terminal) adjustMarginAndPadding() (int, int, [4]int, [4]int) {
 
 	minAreaWidth := minWidth
 	minAreaHeight := minHeight
+	if t.inputless {
+		minAreaHeight--
+	}
 	if t.noSeparatorLine() {
-		minAreaHeight -= 1
+		minAreaHeight--
 	}
 	if t.needPreviewWindow() {
 		minPreviewWidth, minPreviewHeight := t.minPreviewSize(t.activePreviewOpts)
@@ -1756,7 +1770,7 @@ func (t *Terminal) resizeWindows(forcePreview bool, redrawBorder bool) {
 	shrink := 0
 	hasHeaderWindow := t.hasHeaderWindow()
 	hasHeaderLinesWindow := t.hasHeaderLinesWindow()
-	hasInputWindow := t.inputBorderShape.Visible() || hasHeaderWindow || hasHeaderLinesWindow
+	hasInputWindow := !t.inputless && (t.inputBorderShape.Visible() || hasHeaderWindow || hasHeaderLinesWindow)
 	if hasInputWindow {
 		inputWindowHeight := 2
 		if t.noSeparatorLine() {
@@ -1873,6 +1887,9 @@ func (t *Terminal) resizeWindows(forcePreview bool, redrawBorder bool) {
 			switch previewOpts.position {
 			case posUp, posDown:
 				minWindowHeight := minHeight
+				if t.inputless {
+					minWindowHeight--
+				}
 				if t.noSeparatorLine() {
 					minWindowHeight--
 				}
@@ -2227,6 +2244,9 @@ func (t *Terminal) promptLine() int {
 }
 
 func (t *Terminal) placeCursor() {
+	if t.inputless {
+		return
+	}
 	if t.inputWindow != nil {
 		y := t.inputWindow.Height() - 1
 		if t.layout == layoutReverse {
@@ -2239,6 +2259,9 @@ func (t *Terminal) placeCursor() {
 }
 
 func (t *Terminal) printPrompt() {
+	if t.inputless {
+		return
+	}
 	w := t.window
 	if t.inputWindow != nil {
 		w = t.inputWindow
@@ -2266,6 +2289,9 @@ func (t *Terminal) trimMessage(message string, maxWidth int) string {
 }
 
 func (t *Terminal) printInfo() {
+	if t.inputless {
+		return
+	}
 	t.withWindow(t.inputWindow, func() { t.printInfoImpl() })
 }
 
@@ -2509,7 +2535,7 @@ func (t *Terminal) headerIndent(borderShape tui.BorderShape) int {
 
 func (t *Terminal) printHeaderImpl(window tui.Window, borderShape tui.BorderShape, lines1 []string, lines2 []string) {
 	max := t.window.Height()
-	if t.inputWindow == nil && window == nil && t.headerFirst {
+	if !t.inputless && t.inputWindow == nil && window == nil && t.headerFirst {
 		max--
 		if !t.noSeparatorLine() {
 			max--
@@ -2539,7 +2565,7 @@ func (t *Terminal) printHeaderImpl(window tui.Window, borderShape tui.BorderShap
 		if needReverse && idx < len(lines1) {
 			line = len(lines1) - idx - 1
 		}
-		if t.inputWindow == nil && window == nil && !t.headerFirst {
+		if !t.inputless && t.inputWindow == nil && window == nil && !t.headerFirst {
 			line++
 			if !t.noSeparatorLine() {
 				line++
@@ -5681,7 +5707,7 @@ func (t *Terminal) Loop() error {
 					// Header
 					numLines := t.visibleHeaderLinesInList()
 					lineOffset := 0
-					if t.inputWindow == nil && !t.headerFirst {
+					if !t.inputless && t.inputWindow == nil && !t.headerFirst {
 						// offset for info line
 						if t.noSeparatorLine() {
 							lineOffset = 1
@@ -5829,7 +5855,13 @@ func (t *Terminal) Loop() error {
 			} else if !doActions(actions) {
 				continue
 			}
-			t.truncateQuery()
+			if t.inputless {
+				// Always just discard the change
+				t.input = previousInput
+				t.cx = len(t.input)
+			} else {
+				t.truncateQuery()
+			}
 			queryChanged = string(previousInput) != string(t.input)
 			if queryChanged {
 				t.inputOverride = nil
@@ -6016,6 +6048,9 @@ func (t *Terminal) vset(o int) bool {
 
 // Number of prompt lines in the list window
 func (t *Terminal) promptLines() int {
+	if t.inputless {
+		return 0
+	}
 	if t.inputWindow != nil {
 		return 0
 	}
diff --git a/src/tui/dummy.go b/src/tui/dummy.go
index 1cfb292e..8dd58457 100644
--- a/src/tui/dummy.go
+++ b/src/tui/dummy.go
@@ -45,6 +45,7 @@ func (r *FullscreenRenderer) Clear()                             {}
 func (r *FullscreenRenderer) NeedScrollbarRedraw() bool          { return false }
 func (r *FullscreenRenderer) ShouldEmitResizeEvent() bool        { return false }
 func (r *FullscreenRenderer) Bell()                              {}
+func (r *FullscreenRenderer) HideCursor()                        {}
 func (r *FullscreenRenderer) Refresh()                           {}
 func (r *FullscreenRenderer) Close()                             {}
 func (r *FullscreenRenderer) Size() TermSize                     { return TermSize{} }
diff --git a/src/tui/light.go b/src/tui/light.go
index 54c38c18..7b40efbb 100644
--- a/src/tui/light.go
+++ b/src/tui/light.go
@@ -77,7 +77,13 @@ func (r *LightRenderer) csi(code string) string {
 
 func (r *LightRenderer) flush() {
 	if r.queued.Len() > 0 {
-		r.flushRaw("\x1b[?7l\x1b[?25l" + r.queued.String() + "\x1b[?25h\x1b[?7h")
+		raw := "\x1b[?7l\x1b[?25l" + r.queued.String()
+		if r.showCursor {
+			raw += "\x1b[?25h\x1b[?7h"
+		} else {
+			raw += "\x1b[?7h"
+		}
+		r.flushRaw(raw)
 		r.queued.Reset()
 	}
 }
@@ -110,6 +116,7 @@ type LightRenderer struct {
 	y             int
 	x             int
 	maxHeightFunc func(int) int
+	showCursor    bool
 
 	// Windows only
 	ttyinChannel    chan byte
@@ -152,7 +159,8 @@ func NewLightRenderer(ttyin *os.File, theme *ColorTheme, forceBlack bool, mouse
 		tabstop:       tabstop,
 		fullscreen:    fullscreen,
 		upOneLine:     false,
-		maxHeightFunc: maxHeightFunc}
+		maxHeightFunc: maxHeightFunc,
+		showCursor:    true}
 	return &r, nil
 }
 
@@ -759,6 +767,9 @@ func (r *LightRenderer) Close() {
 	} else if !r.fullscreen {
 		r.csi("u")
 	}
+	if !r.showCursor {
+		r.csi("?25h")
+	}
 	r.disableMouse()
 	r.flush()
 	r.closePlatform()
@@ -1214,3 +1225,7 @@ func (w *LightWindow) Erase() {
 func (w *LightWindow) EraseMaybe() bool {
 	return false
 }
+
+func (r *LightRenderer) HideCursor() {
+	r.showCursor = false
+}
diff --git a/src/tui/tcell.go b/src/tui/tcell.go
index 3738214a..9d6fde80 100644
--- a/src/tui/tcell.go
+++ b/src/tui/tcell.go
@@ -52,6 +52,7 @@ type TcellWindow struct {
 	borderStyle BorderStyle
 	uri         *string
 	params      *string
+	showCursor  bool
 }
 
 func (w *TcellWindow) Top() int {
@@ -72,7 +73,9 @@ func (w *TcellWindow) Height() int {
 
 func (w *TcellWindow) Refresh() {
 	if w.moveCursor {
-		_screen.ShowCursor(w.left+w.lastX, w.top+w.lastY)
+		if w.showCursor {
+			_screen.ShowCursor(w.left+w.lastX, w.top+w.lastY)
+		}
 		w.moveCursor = false
 	}
 	w.lastX = 0
@@ -104,6 +107,10 @@ func (r *FullscreenRenderer) Bell() {
 	_screen.Beep()
 }
 
+func (r *FullscreenRenderer) HideCursor() {
+	r.showCursor = false
+}
+
 func (r *FullscreenRenderer) PassThrough(str string) {
 	// No-op
 	// https://github.com/gdamore/tcell/pull/650#issuecomment-1806442846
@@ -168,6 +175,9 @@ func (r *FullscreenRenderer) getScreen() (tcell.Screen, error) {
 		if e != nil {
 			return nil, e
 		}
+		if !r.showCursor {
+			s.HideCursor()
+		}
 		_screen = s
 	}
 	return _screen, nil
@@ -590,7 +600,8 @@ func (r *FullscreenRenderer) NewWindow(top int, left int, width int, height int,
 		width:       width,
 		height:      height,
 		normal:      normal,
-		borderStyle: borderStyle}
+		borderStyle: borderStyle,
+		showCursor:  r.showCursor}
 	w.Erase()
 	return w
 }
diff --git a/src/tui/tui.go b/src/tui/tui.go
index fe8fc243..0c778ad6 100644
--- a/src/tui/tui.go
+++ b/src/tui/tui.go
@@ -615,6 +615,7 @@ type Renderer interface {
 	NeedScrollbarRedraw() bool
 	ShouldEmitResizeEvent() bool
 	Bell()
+	HideCursor()
 
 	GetChar() Event
 
@@ -662,6 +663,7 @@ type FullscreenRenderer struct {
 	forceBlack   bool
 	prevDownTime time.Time
 	clicks       [][2]int
+	showCursor   bool
 }
 
 func NewFullscreenRenderer(theme *ColorTheme, forceBlack bool, mouse bool) Renderer {
@@ -670,7 +672,8 @@ func NewFullscreenRenderer(theme *ColorTheme, forceBlack bool, mouse bool) Rende
 		mouse:        mouse,
 		forceBlack:   forceBlack,
 		prevDownTime: time.Unix(0, 0),
-		clicks:       [][2]int{}}
+		clicks:       [][2]int{},
+		showCursor:   true}
 	return r
 }
 
diff --git a/test/test_layout.rb b/test/test_layout.rb
index dcfe1d78..6e844527 100644
--- a/test/test_layout.rb
+++ b/test/test_layout.rb
@@ -876,4 +876,19 @@ class TestLayout < TestInteractive
     BLOCK
     tmux.until { assert_block(block, _1) }
   end
+
+  def test_min_height_auto_no_input
+    tmux.send_keys %(seq 100 | #{FZF} --style full:sharp --no-input --height 1% --min-height 5+), :Enter
+
+    block = <<~BLOCK
+      ┌─────────
+      │   5
+      │   4
+      │   3
+      │   2
+      │ > 1
+      └─────────
+    BLOCK
+    tmux.until { assert_block(block, _1) }
+  end
 end