Action: Add DeleteSelections action and update default keybindings

This commit introduces a new `DeleteSelections` action that acts as a global check for active selections across all cursors.
If any selections exist, it deletes them and returns true, preventing subsequent chained actions from executing.

The default keybindings for `deleteWordLeft` (Alt-Backspace/Ctrl-H) have been  updated to chain `DeleteSelections|DeleteWordLeft`.
This ensures predictable behavior in multi-cursor scenarios:
If any cursor has a selection, the "Delete Selection" behavior takes precedence over directional word deletion, preventing accidental deletion of adjacent text when selections are present.

Author: masmu

internal/action/actions.go

@@ -828,6 +828,26 @@ func (h *BufPane) Delete() bool {
 	return true
 }
 
+// DeleteSelections checks for any active cursors selections and
+// if there are it deletes them and returns true. It returns false when
+// there are no selections.
+func (h *BufPane) DeleteSelections() bool {
+	hasSelection := false
+	for _, c := range h.Buf.GetCursors() {
+		if c.HasSelection() {
+			c.DeleteSelection()
+			c.ResetSelection()
+			hasSelection = true
+		}
+	}
+
+	if hasSelection {
+		h.Relocate()
+		return true
+	}
+	return false
+}
+
 // IndentSelection indents the current selection
 func (h *BufPane) IndentSelection() bool {
 	if h.Cursor.HasSelection() {

internal/action/bufpane.go

@@ -762,6 +762,7 @@ var BufKeyActions = map[string]BufKeyAction{
 	"InsertNewline":             (*BufPane).InsertNewline,
 	"Backspace":                 (*BufPane).Backspace,
 	"Delete":                    (*BufPane).Delete,
+	"DeleteSelections":          (*BufPane).DeleteSelections,
 	"InsertTab":                 (*BufPane).InsertTab,
 	"Save":                      (*BufPane).Save,
 	"SaveAll":                   (*BufPane).SaveAll,

internal/action/defaults_darwin.go

@@ -31,8 +31,8 @@ var bufdefaults = map[string]string{
 	"CtrlH":          "Backspace",
 	"Backspace":      "Backspace",
 	"OldBackspace":   "Backspace",
-	"Alt-CtrlH":      "DeleteWordLeft",
-	"Alt-Backspace":  "DeleteWordLeft",
+	"Alt-CtrlH":      "DeleteSelections|DeleteWordLeft",
+	"Alt-Backspace":  "DeleteSelections|DeleteWordLeft",
 	"Tab":            "Autocomplete|IndentSelection|InsertTab",
 	"Backtab":        "CycleAutocompleteBack|OutdentSelection|OutdentLine",
 	"Ctrl-o":         "OpenFile",

internal/action/defaults_other.go

@@ -34,8 +34,8 @@ var bufdefaults = map[string]string{
 	"CtrlH":          "Backspace",
 	"Backspace":      "Backspace",
 	"OldBackspace":   "Backspace",
-	"Alt-CtrlH":      "DeleteWordLeft",
-	"Alt-Backspace":  "DeleteWordLeft",
+	"Alt-CtrlH":      "DeleteSelections|DeleteWordLeft",
+	"Alt-Backspace":  "DeleteSelections|DeleteWordLeft",
 	"Tab":            "Autocomplete|IndentSelection|InsertTab",
 	"Backtab":        "CycleAutocompleteBack|OutdentSelection|OutdentLine",
 	"Ctrl-o":         "OpenFile",

runtime/help/keybindings.md

@@ -252,6 +252,7 @@ SelectToParagraphNext
 InsertNewline
 Backspace
 Delete
+DeleteSelections
 InsertTab
 Save
 SaveAll
@@ -559,8 +560,8 @@ conventions for text editing defaults.
     "Enter":          "InsertNewline",
     "Ctrl-h":         "Backspace",
     "Backspace":      "Backspace",
-    "Alt-CtrlH":      "DeleteWordLeft",
-    "Alt-Backspace":  "DeleteWordLeft",
+    "Alt-CtrlH":      "DeleteSelections|DeleteWordLeft",
+    "Alt-Backspace":  "DeleteSelections|DeleteWordLeft",
     "Tab":            "Autocomplete|IndentSelection|InsertTab",
     "Backtab":        "OutdentSelection|OutdentLine",
     "Ctrl-o":         "OpenFile",
@@ -693,8 +694,8 @@ are given below:
         "CtrlH":          "Backspace",
         "Backspace":      "Backspace",
         "OldBackspace":   "Backspace",
-        "Alt-CtrlH":      "DeleteWordLeft",
-        "Alt-Backspace":  "DeleteWordLeft",
+        "Alt-CtrlH":      "DeleteSelections|DeleteWordLeft",
+        "Alt-Backspace":  "DeleteSelections|DeleteWordLeft",
         "Tab":            "CommandComplete",
         "Backtab":        "CycleAutocompleteBack",
         "Ctrl-z":         "Undo",