Add jump and jump-cancel events

Close #3412

    # Default behavior
    fzf --bind space:jump

    # Same as jump-accept action
    fzf --bind space:jump,jump:accept

    # Accept on jump, abort on cancel
    fzf --bind space:jump,jump:accept,jump-cancel:abort

    # Change header on jump-cancel
    fzf --bind 'space:change-header(Type jump label)+jump,jump-cancel:change-header:Jump cancelled'

man/man1/fzf.1

@@ -1160,6 +1160,7 @@ e.g.
      \fB# Move cursor to the last item and select all items
      seq 1000 | fzf --multi --sync --bind start:last+select-all\fR
 .RE
+
 \fIload\fR
 .RS
 Triggered when the input stream is complete and the initial processing of the
@@ -1169,6 +1170,7 @@ e.g.
      \fB# Change the prompt to "loaded" when the input stream is complete
      (seq 10; sleep 1; seq 11 20) | fzf --prompt 'Loading> ' --bind 'load:change-prompt:Loaded> '\fR
 .RE
+
 \fIresize\fR
 .RS
 Triggered when the terminal size is changed.
@@ -1176,6 +1178,7 @@ Triggered when the terminal size is changed.
 e.g.
      \fBfzf --bind 'resize:transform-header:echo Resized: ${FZF_COLUMNS}x${FZF_LINES}'\fR
 .RE
+
 \fIresult\fR
 .RS
 Triggered when the filtering for the current query is complete and the result list is ready.
@@ -1209,6 +1212,7 @@ e.g.
      # Beware not to introduce an infinite loop
      seq 10 | fzf --bind 'focus:up' --cycle\fR
 .RE
+
 \fIone\fR
 .RS
 Triggered when there's only one match. \fBone:accept\fR binding is comparable
@@ -1220,6 +1224,7 @@ e.g.
      \fB# Automatically select the only match
      seq 10 | fzf --bind one:accept\fR
 .RE
+
 \fIzero\fR
 .RS
 Triggered when there's no match. \fBzero:abort\fR binding is comparable to
@@ -1241,6 +1246,22 @@ e.g.
      \fBfzf --bind backward-eof:abort\fR
 .RE
 
+\fIjump\fR
+.RS
+Triggered when successfully jumped to the target item in \fB--jump\fR mode.
+
+e.g.
+     \fBfzf --bind space:jump,jump:accept\fR
+.RE
+
+\fIjump-cancel\fR
+.RS
+Triggered when \fB--jump\fR mode is cancelled.
+
+e.g.
+     \fBfzf --bind space:jump,jump:accept,jump-cancel:abort\fR
+.RE
+
 .SS AVAILABLE ACTIONS:
 A key or an event can be bound to one or more of the following actions.
 

src/options.go

@@ -698,6 +698,10 @@ func parseKeyChordsImpl(str string, message string, exit func(string)) map[tui.E
 			add(tui.One)
 		case "zero":
 			add(tui.Zero)
+		case "jump":
+			add(tui.Jump)
+		case "jump-cancel":
+			add(tui.JumpCancel)
 		case "alt-enter", "alt-return":
 			chords[tui.CtrlAltKey('m')] = key
 		case "alt-space":

src/terminal.go

@@ -4108,6 +4108,9 @@ func (t *Terminal) Loop() {
 			// Break out of jump mode if any action is submitted to the server
 			if t.jumping != jumpDisabled {
 				t.jumping = jumpDisabled
+				if acts, prs := t.keymap[tui.JumpCancel.AsEvent()]; prs && !doActions(acts) {
+					continue
+				}
 				req(reqList)
 			}
 			if len(actions) == 0 {
@@ -4121,19 +4124,17 @@ func (t *Terminal) Loop() {
 			t.truncateQuery()
 			queryChanged = string(previousInput) != string(t.input)
 			changed = changed || queryChanged
-			if onChanges, prs := t.keymap[tui.Change.AsEvent()]; queryChanged && prs {
-				if !doActions(onChanges) {
-					continue
-				}
+			if onChanges, prs := t.keymap[tui.Change.AsEvent()]; queryChanged && prs && !doActions(onChanges) {
+				continue
 			}
-			if onEOFs, prs := t.keymap[tui.BackwardEOF.AsEvent()]; beof && prs {
-				if !doActions(onEOFs) {
-					continue
-				}
+			if onEOFs, prs := t.keymap[tui.BackwardEOF.AsEvent()]; beof && prs && !doActions(onEOFs) {
+				continue
 			}
 		} else {
+			jumpEvent := tui.JumpCancel
 			if event.Type == tui.Rune {
 				if idx := strings.IndexRune(t.jumpLabels, event.Char); idx >= 0 && idx < t.maxItems() && idx < t.merger.Length() {
+					jumpEvent = tui.Jump
 					t.cy = idx + t.offset
 					if t.jumping == jumpAcceptEnabled {
 						req(reqClose)
@@ -4141,6 +4142,9 @@ func (t *Terminal) Loop() {
 				}
 			}
 			t.jumping = jumpDisabled
+			if acts, prs := t.keymap[jumpEvent.AsEvent()]; prs && !doActions(acts) {
+				continue
+			}
 			req(reqList)
 		}
 

src/tui/tui.go

@@ -108,6 +108,8 @@ const (
 	One
 	Zero
 	Result
+	Jump
+	JumpCancel
 
 	AltBS
 

test/test_go.rb

@@ -1468,6 +1468,19 @@ class TestGoFZF < TestBase
     assert_equal '3', readonce.chomp
   end
 
+  def test_jump_events
+    tmux.send_keys "seq 1000 | #{fzf("--multi --jump-labels 12345 --bind 'ctrl-j:jump,jump:preview(echo jumped to {}),jump-cancel:preview(echo jump cancelled at {})'")}", :Enter
+    tmux.until { |lines| assert_equal '  1000/1000 (0)', lines[-2] }
+    tmux.send_keys 'C-j'
+    tmux.until { |lines| assert_includes lines[-7], '5 5' }
+    tmux.send_keys '3'
+    tmux.until { |lines| assert(lines.any? { _1.include?('jumped to 3') }) }
+    tmux.send_keys 'C-j'
+    tmux.until { |lines| assert_includes lines[-7], '5 5' }
+    tmux.send_keys 'C-c'
+    tmux.until { |lines| assert(lines.any? { _1.include?('jump cancelled at 3') }) }
+  end
+
   def test_pointer
     tmux.send_keys "seq 10 | #{fzf("--pointer '>>'")}", :Enter
     # Assert that specified pointer is displayed