Add 'click-footer' event

6 files changed, 84 insertions, 3 deletions

diff --git a/CHANGELOG.md b/CHANGELOG.md
index 3f489606..c0e2a872 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,6 +1,27 @@
 CHANGELOG
 =========
 
+0.65.0
+------
+- Added `click-footer` event that is triggered when the footer section is clicked. When the event is triggered, the following environment variables are set:
+    - `$FZF_CLICK_FOOTER_COLUMN` - clicked column (1-based)
+    - `$FZF_CLICK_FOOTER_LINE` - clicked line (1-based)
+    - `$FZF_CLICK_FOOTER_WORD` - the word under the cursor
+  ```sh
+  fzf --footer $'[Edit] [View]\n[Copy to clipboard]' \
+      --with-shell 'bash -c' \
+      --bind 'click-footer:transform:
+        [[ $FZF_CLICK_FOOTER_WORD =~ Edit ]] && echo "execute:vim \{}"
+        [[ $FZF_CLICK_FOOTER_WORD =~ View ]] && echo "execute:view \{}"
+        (( FZF_CLICK_FOOTER_LINE == 2 )) && (( FZF_CLICK_FOOTER_COLUMN < 20 )) &&
+            echo "execute-silent(echo -n \{} | pbcopy)+bell"
+      '
+  ```
+- Added support for `{*n}` and `{*nf}` placeholder.
+    - `{*n}` evaluates to the zero-based ordinal index of all matched items.
+    - `{*nf}` evaluates to the temporary file containing that.
+- Bug fixes
+
 0.64.0
 ------
 - Added `multi` event that is triggered when the multi-selection has changed.
diff --git a/man/man1/fzf.1 b/man/man1/fzf.1
index 5ec02a76..0553fc02 100644
--- a/man/man1/fzf.1
+++ b/man/man1/fzf.1
@@ -1682,6 +1682,14 @@ e.g.
                           )'\fR
 .RE
 
+\fIclick\-footer\fR
+.RS
+Triggered when a mouse click occurs within the footer. Sets
+\fBFZF_CLICK_FOOTER_LINE\fR and \fBFZF_CLICK_FOOTER_COLUMN\fR environment
+variables starting from 1. It optionally sets \fBFZF_CLICK_FOOTER_WORD\fR
+if clicked on a word.
+.RE
+
 .SS AVAILABLE ACTIONS:
 A key or an event can be bound to one or more of the following actions.
 
diff --git a/src/options.go b/src/options.go
index 6cc13c46..3de1eefa 100644
--- a/src/options.go
+++ b/src/options.go
@@ -1008,6 +1008,8 @@ func parseKeyChordsImpl(str string, message string) (map[tui.Event]string, error
 			add(tui.JumpCancel)
 		case "click-header":
 			add(tui.ClickHeader)
+		case "click-footer":
+			add(tui.ClickFooter)
 		case "multi":
 			add(tui.Multi)
 		case "alt-enter", "alt-return":
diff --git a/src/terminal.go b/src/terminal.go
index 95977614..de134356 100644
--- a/src/terminal.go
+++ b/src/terminal.go
@@ -422,6 +422,8 @@ type Terminal struct {
 	forcePreview       bool
 	clickHeaderLine    int
 	clickHeaderColumn  int
+	clickFooterLine    int
+	clickFooterColumn  int
 	proxyScript        string
 	numLinesCache      map[int32]numLinesCacheValue
 }
@@ -1259,7 +1261,10 @@ func (t *Terminal) environImpl(forPreview bool) []string {
 	env = append(env, fmt.Sprintf("FZF_POS=%d", util.Min(t.merger.Length(), t.cy+1)))
 	env = append(env, fmt.Sprintf("FZF_CLICK_HEADER_LINE=%d", t.clickHeaderLine))
 	env = append(env, fmt.Sprintf("FZF_CLICK_HEADER_COLUMN=%d", t.clickHeaderColumn))
+	env = append(env, fmt.Sprintf("FZF_CLICK_FOOTER_LINE=%d", t.clickFooterLine))
+	env = append(env, fmt.Sprintf("FZF_CLICK_FOOTER_COLUMN=%d", t.clickFooterColumn))
 	env = t.addClickHeaderWord(env)
+	env = t.addClickFooterWord(env)
 
 	// Add preview environment variables if preview is enabled
 	pwindowSize := t.pwindowSize()
@@ -1634,6 +1639,8 @@ func (t *Terminal) changeFooter(footer string) {
 		lines = strings.Split(strings.TrimSuffix(footer, "\n"), "\n")
 	}
 	t.footer = lines
+	t.clickFooterLine = 0
+	t.clickFooterColumn = 0
 }
 
 // UpdateHeader updates the header
@@ -4803,6 +4810,35 @@ func (t *Terminal) addClickHeaderWord(env []string) []string {
 	return env
 }
 
+func (t *Terminal) addClickFooterWord(env []string) []string {
+	clickFooterLine := t.clickFooterLine - 1
+	if clickFooterLine < 0 || clickFooterLine >= len(t.footer) {
+		// Never clicked on the footer
+		return env
+	}
+
+	// NOTE: Unlike in click-header, we don't use --delimiter here, since we're
+	// only interested in the word, not nth. Does this make sense?
+	words := Tokenize(t.footer[clickFooterLine], Delimiter{})
+	colNum := t.clickFooterColumn - 1
+	for _, token := range words {
+		prefixWidth := int(token.prefixLength)
+		word := token.text.ToString()
+		trimmed := strings.TrimRightFunc(word, unicode.IsSpace)
+		trimWidth, _ := util.RunesWidth([]rune(trimmed), prefixWidth, t.tabstop, math.MaxInt32)
+
+		// Find the position of the first non-space character in the word
+		minPos := strings.IndexFunc(trimmed, func(r rune) bool {
+			return !unicode.IsSpace(r)
+		})
+		if colNum >= minPos && colNum >= prefixWidth && colNum < prefixWidth+trimWidth {
+			env = append(env, fmt.Sprintf("FZF_CLICK_FOOTER_WORD=%s", trimmed))
+			return env
+		}
+	}
+	return env
+}
+
 // Loop is called to start Terminal I/O
 func (t *Terminal) Loop() error {
 	// prof := profile.Start(profile.ProfilePath("/tmp/"))
@@ -6380,6 +6416,18 @@ func (t *Terminal) Loop() error {
 					return doActions(actionsFor(tui.ClickHeader))
 				}
 
+				// Inside the footer window
+				if clicked && t.footerWindow != nil && t.footerWindow.Enclose(my, mx) {
+					mx -= t.footerWindow.Left() + t.headerIndent(t.footerBorderShape)
+					my -= t.footerWindow.Top()
+					if mx < 0 {
+						break
+					}
+					t.clickFooterLine = my + 1
+					t.clickFooterColumn = mx + 1
+					return doActions(actionsFor(tui.ClickFooter))
+				}
+
 				// Ignored
 				if !t.window.Enclose(my, mx) && !barDragging {
 					break
diff --git a/src/tui/eventtype_string.go b/src/tui/eventtype_string.go
index b4e82f4a..9d4aa77d 100644
--- a/src/tui/eventtype_string.go
+++ b/src/tui/eventtype_string.go
@@ -110,12 +110,13 @@ func _() {
 	_ = x[Jump-99]
 	_ = x[JumpCancel-100]
 	_ = x[ClickHeader-101]
-	_ = x[Multi-102]
+	_ = x[ClickFooter-102]
+	_ = x[Multi-103]
 }
 
-const _EventType_name = "RuneCtrlACtrlBCtrlCCtrlDCtrlECtrlFCtrlGCtrlHTabCtrlJCtrlKCtrlLEnterCtrlNCtrlOCtrlPCtrlQCtrlRCtrlSCtrlTCtrlUCtrlVCtrlWCtrlXCtrlYCtrlZEscCtrlSpaceCtrlDeleteCtrlBackSlashCtrlRightBracketCtrlCaretCtrlSlashShiftTabBackspaceDeletePageUpPageDownUpDownLeftRightHomeEndInsertShiftUpShiftDownShiftLeftShiftRightShiftDeleteF1F2F3F4F5F6F7F8F9F10F11F12AltBackspaceAltUpAltDownAltLeftAltRightAltShiftUpAltShiftDownAltShiftLeftAltShiftRightAltCtrlAltInvalidFatalBracketedPasteBeginBracketedPasteEndMouseDoubleClickLeftClickRightClickSLeftClickSRightClickScrollUpScrollDownSScrollUpSScrollDownPreviewScrollUpPreviewScrollDownResizeChangeBackwardEOFStartLoadFocusOneZeroResultJumpJumpCancelClickHeaderMulti"
+const _EventType_name = "RuneCtrlACtrlBCtrlCCtrlDCtrlECtrlFCtrlGCtrlHTabCtrlJCtrlKCtrlLEnterCtrlNCtrlOCtrlPCtrlQCtrlRCtrlSCtrlTCtrlUCtrlVCtrlWCtrlXCtrlYCtrlZEscCtrlSpaceCtrlDeleteCtrlBackSlashCtrlRightBracketCtrlCaretCtrlSlashShiftTabBackspaceDeletePageUpPageDownUpDownLeftRightHomeEndInsertShiftUpShiftDownShiftLeftShiftRightShiftDeleteF1F2F3F4F5F6F7F8F9F10F11F12AltBackspaceAltUpAltDownAltLeftAltRightAltShiftUpAltShiftDownAltShiftLeftAltShiftRightAltCtrlAltInvalidFatalBracketedPasteBeginBracketedPasteEndMouseDoubleClickLeftClickRightClickSLeftClickSRightClickScrollUpScrollDownSScrollUpSScrollDownPreviewScrollUpPreviewScrollDownResizeChangeBackwardEOFStartLoadFocusOneZeroResultJumpJumpCancelClickHeaderClickFooterMulti"
 
-var _EventType_index = [...]uint16{0, 4, 9, 14, 19, 24, 29, 34, 39, 44, 47, 52, 57, 62, 67, 72, 77, 82, 87, 92, 97, 102, 107, 112, 117, 122, 127, 132, 135, 144, 154, 167, 183, 192, 201, 209, 218, 224, 230, 238, 240, 244, 248, 253, 257, 260, 266, 273, 282, 291, 301, 312, 314, 316, 318, 320, 322, 324, 326, 328, 330, 333, 336, 339, 351, 356, 363, 370, 378, 388, 400, 412, 425, 428, 435, 442, 447, 466, 483, 488, 499, 508, 518, 528, 539, 547, 557, 566, 577, 592, 609, 615, 621, 632, 637, 641, 646, 649, 653, 659, 663, 673, 684, 689}
+var _EventType_index = [...]uint16{0, 4, 9, 14, 19, 24, 29, 34, 39, 44, 47, 52, 57, 62, 67, 72, 77, 82, 87, 92, 97, 102, 107, 112, 117, 122, 127, 132, 135, 144, 154, 167, 183, 192, 201, 209, 218, 224, 230, 238, 240, 244, 248, 253, 257, 260, 266, 273, 282, 291, 301, 312, 314, 316, 318, 320, 322, 324, 326, 328, 330, 333, 336, 339, 351, 356, 363, 370, 378, 388, 400, 412, 425, 428, 435, 442, 447, 466, 483, 488, 499, 508, 518, 528, 539, 547, 557, 566, 577, 592, 609, 615, 621, 632, 637, 641, 646, 649, 653, 659, 663, 673, 684, 695, 700}
 
 func (i EventType) String() string {
 	if i < 0 || i >= EventType(len(_EventType_index)-1) {
diff --git a/src/tui/tui.go b/src/tui/tui.go
index a91e93e2..3f5d4282 100644
--- a/src/tui/tui.go
+++ b/src/tui/tui.go
@@ -132,6 +132,7 @@ const (
 	Jump
 	JumpCancel
 	ClickHeader
+	ClickFooter
 	Multi
 )