Support block delete with word and line modifiers (#79973)

Adds support for overridable delete/backspace keyboard shortcuts

packages/flutter/lib/src/widgets/default_text_editing_actions.dart

@@ -36,6 +36,12 @@ class DefaultTextEditingActions extends Actions{
   // are called on which platform.
   static final Map<Type, Action<Intent>> _shortcutsActions = <Type, Action<Intent>>{
     DoNothingAndStopPropagationTextIntent: _DoNothingAndStopPropagationTextAction(),
+    DeleteTextIntent: _DeleteTextAction(),
+    DeleteByWordTextIntent: _DeleteByWordTextAction(),
+    DeleteByLineTextIntent: _DeleteByLineTextAction(),
+    DeleteForwardTextIntent: _DeleteForwardTextAction(),
+    DeleteForwardByWordTextIntent: _DeleteForwardByWordTextAction(),
+    DeleteForwardByLineTextIntent: _DeleteForwardByLineTextAction(),
     ExtendSelectionDownTextIntent: _ExtendSelectionDownTextAction(),
     ExtendSelectionLeftByLineTextIntent: _ExtendSelectionLeftByLineTextAction(),
     ExtendSelectionLeftByWordTextIntent: _ExtendSelectionLeftByWordTextAction(),
@@ -76,6 +82,48 @@ class _DoNothingAndStopPropagationTextAction extends TextEditingAction<DoNothing
   void invoke(DoNothingAndStopPropagationTextIntent intent, [BuildContext? context]) {}
 }
 
+class _DeleteTextAction extends TextEditingAction<DeleteTextIntent> {
+  @override
+  Object? invoke(DeleteTextIntent intent, [BuildContext? context]) {
+    textEditingActionTarget!.renderEditable.delete(SelectionChangedCause.keyboard);
+  }
+}
+
+class _DeleteByWordTextAction extends TextEditingAction<DeleteByWordTextIntent> {
+  @override
+  Object? invoke(DeleteByWordTextIntent intent, [BuildContext? context]) {
+    textEditingActionTarget!.renderEditable.deleteByWord(SelectionChangedCause.keyboard, false);
+  }
+}
+
+class _DeleteByLineTextAction extends TextEditingAction<DeleteByLineTextIntent> {
+  @override
+  Object? invoke(DeleteByLineTextIntent intent, [BuildContext? context]) {
+    textEditingActionTarget!.renderEditable.deleteByLine(SelectionChangedCause.keyboard);
+  }
+}
+
+class _DeleteForwardTextAction extends TextEditingAction<DeleteForwardTextIntent> {
+  @override
+  Object? invoke(DeleteForwardTextIntent intent, [BuildContext? context]) {
+    textEditingActionTarget!.renderEditable.deleteForward(SelectionChangedCause.keyboard);
+  }
+}
+
+class _DeleteForwardByWordTextAction extends TextEditingAction<DeleteForwardByWordTextIntent> {
+  @override
+  Object? invoke(DeleteForwardByWordTextIntent intent, [BuildContext? context]) {
+    textEditingActionTarget!.renderEditable.deleteForwardByWord(SelectionChangedCause.keyboard, false);
+  }
+}
+
+class _DeleteForwardByLineTextAction extends TextEditingAction<DeleteForwardByLineTextIntent> {
+  @override
+  Object? invoke(DeleteForwardByLineTextIntent intent, [BuildContext? context]) {
+    textEditingActionTarget!.renderEditable.deleteForwardByLine(SelectionChangedCause.keyboard);
+  }
+}
+
 class _ExpandSelectionLeftByLineTextAction extends TextEditingAction<ExpandSelectionLeftByLineTextIntent> {
   @override
   Object? invoke(ExpandSelectionLeftByLineTextIntent intent, [BuildContext? context]) {

packages/flutter/lib/src/widgets/default_text_editing_shortcuts.dart

@@ -161,6 +161,12 @@ class DefaultTextEditingShortcuts extends Shortcuts {
   );
 
   static final Map<LogicalKeySet, Intent> _androidShortcuts = <LogicalKeySet, Intent>{
+    LogicalKeySet(LogicalKeyboardKey.backspace): const DeleteTextIntent(),
+    LogicalKeySet(LogicalKeyboardKey.control, LogicalKeyboardKey.backspace): const DeleteByWordTextIntent(),
+    LogicalKeySet(LogicalKeyboardKey.alt, LogicalKeyboardKey.backspace): const DeleteByLineTextIntent(),
+    LogicalKeySet(LogicalKeyboardKey.delete): const DeleteForwardTextIntent(),
+    LogicalKeySet(LogicalKeyboardKey.control, LogicalKeyboardKey.delete): const DeleteForwardByWordTextIntent(),
+    LogicalKeySet(LogicalKeyboardKey.alt, LogicalKeyboardKey.delete): const DeleteForwardByLineTextIntent(),
     LogicalKeySet(LogicalKeyboardKey.alt, LogicalKeyboardKey.arrowDown): const MoveSelectionToEndTextIntent(),
     LogicalKeySet(LogicalKeyboardKey.alt, LogicalKeyboardKey.arrowLeft): const MoveSelectionLeftByLineTextIntent(),
     LogicalKeySet(LogicalKeyboardKey.alt, LogicalKeyboardKey.arrowRight): const MoveSelectionRightByLineTextIntent(),
@@ -195,9 +201,17 @@ class DefaultTextEditingShortcuts extends Shortcuts {
     //   * Meta + shift + arrow up
     //   * Shift + end
     //   * Shift + home
+    //   * Meta + delete
+    //   * Meta + backspace
   };
 
   static final Map<LogicalKeySet, Intent> _fuchsiaShortcuts = <LogicalKeySet, Intent>{
+    LogicalKeySet(LogicalKeyboardKey.backspace): const DeleteTextIntent(),
+    LogicalKeySet(LogicalKeyboardKey.control, LogicalKeyboardKey.backspace): const DeleteByWordTextIntent(),
+    LogicalKeySet(LogicalKeyboardKey.alt, LogicalKeyboardKey.backspace): const DeleteByLineTextIntent(),
+    LogicalKeySet(LogicalKeyboardKey.delete): const DeleteForwardTextIntent(),
+    LogicalKeySet(LogicalKeyboardKey.control, LogicalKeyboardKey.delete): const DeleteForwardByWordTextIntent(),
+    LogicalKeySet(LogicalKeyboardKey.alt, LogicalKeyboardKey.delete): const DeleteForwardByLineTextIntent(),
     LogicalKeySet(LogicalKeyboardKey.alt, LogicalKeyboardKey.arrowDown): const MoveSelectionToEndTextIntent(),
     LogicalKeySet(LogicalKeyboardKey.alt, LogicalKeyboardKey.arrowLeft): const MoveSelectionLeftByLineTextIntent(),
     LogicalKeySet(LogicalKeyboardKey.alt, LogicalKeyboardKey.arrowRight): const MoveSelectionRightByLineTextIntent(),
@@ -232,9 +246,17 @@ class DefaultTextEditingShortcuts extends Shortcuts {
     //   * Meta + shift + arrow up
     //   * Shift + end
     //   * Shift + home
+    //   * Meta + delete
+    //   * Meta + backspace
   };
 
   static final Map<LogicalKeySet, Intent> _iOSShortcuts = <LogicalKeySet, Intent>{
+    LogicalKeySet(LogicalKeyboardKey.backspace): const DeleteTextIntent(),
+    LogicalKeySet(LogicalKeyboardKey.control, LogicalKeyboardKey.backspace): const DeleteByWordTextIntent(),
+    LogicalKeySet(LogicalKeyboardKey.alt, LogicalKeyboardKey.backspace): const DeleteByLineTextIntent(),
+    LogicalKeySet(LogicalKeyboardKey.delete): const DeleteForwardTextIntent(),
+    LogicalKeySet(LogicalKeyboardKey.control, LogicalKeyboardKey.delete): const DeleteForwardByWordTextIntent(),
+    LogicalKeySet(LogicalKeyboardKey.alt, LogicalKeyboardKey.delete): const DeleteForwardByLineTextIntent(),
     LogicalKeySet(LogicalKeyboardKey.alt, LogicalKeyboardKey.arrowDown): const MoveSelectionToEndTextIntent(),
     LogicalKeySet(LogicalKeyboardKey.alt, LogicalKeyboardKey.arrowLeft): const MoveSelectionLeftByLineTextIntent(),
     LogicalKeySet(LogicalKeyboardKey.alt, LogicalKeyboardKey.arrowRight): const MoveSelectionRightByLineTextIntent(),
@@ -269,9 +291,17 @@ class DefaultTextEditingShortcuts extends Shortcuts {
     //   * Meta + shift + arrow up
     //   * Shift + end
     //   * Shift + home
+    //   * Meta + delete
+    //   * Meta + backspace
   };
 
   static final Map<LogicalKeySet, Intent> _linuxShortcuts = <LogicalKeySet, Intent>{
+    LogicalKeySet(LogicalKeyboardKey.backspace): const DeleteTextIntent(),
+    LogicalKeySet(LogicalKeyboardKey.control, LogicalKeyboardKey.backspace): const DeleteByWordTextIntent(),
+    LogicalKeySet(LogicalKeyboardKey.alt, LogicalKeyboardKey.backspace): const DeleteByLineTextIntent(),
+    LogicalKeySet(LogicalKeyboardKey.delete): const DeleteForwardTextIntent(),
+    LogicalKeySet(LogicalKeyboardKey.control, LogicalKeyboardKey.delete): const DeleteForwardByWordTextIntent(),
+    LogicalKeySet(LogicalKeyboardKey.alt, LogicalKeyboardKey.delete): const DeleteForwardByLineTextIntent(),
     LogicalKeySet(LogicalKeyboardKey.alt, LogicalKeyboardKey.arrowDown): const MoveSelectionToEndTextIntent(),
     LogicalKeySet(LogicalKeyboardKey.alt, LogicalKeyboardKey.arrowLeft): const MoveSelectionLeftByLineTextIntent(),
     LogicalKeySet(LogicalKeyboardKey.alt, LogicalKeyboardKey.arrowRight): const MoveSelectionRightByLineTextIntent(),
@@ -306,9 +336,17 @@ class DefaultTextEditingShortcuts extends Shortcuts {
     //   * Meta + shift + arrow up
     //   * Shift + end
     //   * Shift + home
+    //   * Meta + delete
+    //   * Meta + backspace
   };
 
   static final Map<LogicalKeySet, Intent> _macShortcuts = <LogicalKeySet, Intent>{
+    LogicalKeySet(LogicalKeyboardKey.backspace): const DeleteTextIntent(),
+    LogicalKeySet(LogicalKeyboardKey.alt, LogicalKeyboardKey.backspace): const DeleteByWordTextIntent(),
+    LogicalKeySet(LogicalKeyboardKey.meta, LogicalKeyboardKey.backspace): const DeleteByLineTextIntent(),
+    LogicalKeySet(LogicalKeyboardKey.delete): const DeleteForwardTextIntent(),
+    LogicalKeySet(LogicalKeyboardKey.alt, LogicalKeyboardKey.delete): const DeleteForwardByWordTextIntent(),
+    LogicalKeySet(LogicalKeyboardKey.meta, LogicalKeyboardKey.delete): const DeleteForwardByLineTextIntent(),
     LogicalKeySet(LogicalKeyboardKey.alt, LogicalKeyboardKey.arrowDown): const MoveSelectionRightByLineTextIntent(),
     LogicalKeySet(LogicalKeyboardKey.alt, LogicalKeyboardKey.arrowLeft): const MoveSelectionLeftByWordTextIntent(),
     LogicalKeySet(LogicalKeyboardKey.alt, LogicalKeyboardKey.arrowRight): const MoveSelectionRightByWordTextIntent(),
@@ -343,9 +381,17 @@ class DefaultTextEditingShortcuts extends Shortcuts {
     //   * Home
     //   * Shift + end
     //   * Shift + home
+    //   * Control + delete
+    //   * Control + backspace
   };
 
   static final Map<LogicalKeySet, Intent> _windowsShortcuts = <LogicalKeySet, Intent>{
+    LogicalKeySet(LogicalKeyboardKey.backspace): const DeleteTextIntent(),
+    LogicalKeySet(LogicalKeyboardKey.control, LogicalKeyboardKey.backspace): const DeleteByWordTextIntent(),
+    LogicalKeySet(LogicalKeyboardKey.alt, LogicalKeyboardKey.backspace): const DeleteByLineTextIntent(),
+    LogicalKeySet(LogicalKeyboardKey.delete): const DeleteForwardTextIntent(),
+    LogicalKeySet(LogicalKeyboardKey.control, LogicalKeyboardKey.delete): const DeleteForwardByWordTextIntent(),
+    LogicalKeySet(LogicalKeyboardKey.alt, LogicalKeyboardKey.delete): const DeleteForwardByLineTextIntent(),
     LogicalKeySet(LogicalKeyboardKey.alt, LogicalKeyboardKey.arrowDown): const MoveSelectionToEndTextIntent(),
     LogicalKeySet(LogicalKeyboardKey.alt, LogicalKeyboardKey.arrowLeft): const MoveSelectionLeftByLineTextIntent(),
     LogicalKeySet(LogicalKeyboardKey.alt, LogicalKeyboardKey.arrowRight): const MoveSelectionRightByLineTextIntent(),
@@ -380,11 +426,21 @@ class DefaultTextEditingShortcuts extends Shortcuts {
     //   * Meta + shift + arrow left
     //   * Meta + shift + arrow right
     //   * Meta + shift + arrow up
+    //   * Meta + delete
+    //   * Meta + backspace
   };
 
   // Web handles its text selection natively and doesn't use any of these
   // shortcuts in Flutter.
   static final Map<LogicalKeySet, Intent> _webShortcuts = <LogicalKeySet, Intent>{
+    LogicalKeySet(LogicalKeyboardKey.backspace): const DoNothingAndStopPropagationTextIntent(),
+    LogicalKeySet(LogicalKeyboardKey.delete): const DoNothingAndStopPropagationTextIntent(),
+    LogicalKeySet(LogicalKeyboardKey.alt, LogicalKeyboardKey.backspace): const DoNothingAndStopPropagationTextIntent(),
+    LogicalKeySet(LogicalKeyboardKey.alt, LogicalKeyboardKey.delete): const DoNothingAndStopPropagationTextIntent(),
+    LogicalKeySet(LogicalKeyboardKey.control, LogicalKeyboardKey.backspace): const DoNothingAndStopPropagationTextIntent(),
+    LogicalKeySet(LogicalKeyboardKey.control, LogicalKeyboardKey.delete): const DoNothingAndStopPropagationTextIntent(),
+    LogicalKeySet(LogicalKeyboardKey.meta, LogicalKeyboardKey.backspace): const DoNothingAndStopPropagationTextIntent(),
+    LogicalKeySet(LogicalKeyboardKey.meta, LogicalKeyboardKey.delete): const DoNothingAndStopPropagationTextIntent(),
     LogicalKeySet(LogicalKeyboardKey.alt, LogicalKeyboardKey.arrowDown): const DoNothingAndStopPropagationTextIntent(),
     LogicalKeySet(LogicalKeyboardKey.alt, LogicalKeyboardKey.arrowLeft): const DoNothingAndStopPropagationTextIntent(),
     LogicalKeySet(LogicalKeyboardKey.alt, LogicalKeyboardKey.arrowRight): const DoNothingAndStopPropagationTextIntent(),

packages/flutter/lib/src/widgets/text_editing_intents.dart

@@ -4,6 +4,54 @@
 
 import 'actions.dart';
 
+/// An [Intent] to delete a character in the backwards direction.
+///
+/// {@macro flutter.widgets.TextEditingIntents.seeAlso}
+class DeleteTextIntent extends Intent{
+  /// Creates an instance of DeleteTextIntent.
+  const DeleteTextIntent();
+}
+
+/// An [Intent] to delete a word in the backwards direction.
+///
+/// {@macro flutter.widgets.TextEditingIntents.seeAlso}
+class DeleteByWordTextIntent extends Intent{
+  /// Creates an instance of DeleteByWordTextIntent.
+  const DeleteByWordTextIntent();
+}
+
+/// An [Intent] to delete a line in the backwards direction.
+///
+/// {@macro flutter.widgets.TextEditingIntents.seeAlso}
+class DeleteByLineTextIntent extends Intent{
+  /// Creates an instance of DeleteByLineTextIntent.
+  const DeleteByLineTextIntent();
+}
+
+/// An [Intent] to delete in the forward direction.
+///
+/// {@macro flutter.widgets.TextEditingIntents.seeAlso}
+class DeleteForwardTextIntent extends Intent{
+  /// Creates an instance of DeleteForwardTextIntent.
+  const DeleteForwardTextIntent();
+}
+
+/// An [Intent] to delete a word in the forward direction.
+///
+/// {@macro flutter.widgets.TextEditingIntents.seeAlso}
+class DeleteForwardByWordTextIntent extends Intent{
+  /// Creates an instance of DeleteByWordTextIntent.
+  const DeleteForwardByWordTextIntent();
+}
+
+/// An [Intent] to delete a line in the forward direction.
+///
+/// {@macro flutter.widgets.TextEditingIntents.seeAlso}
+class DeleteForwardByLineTextIntent extends Intent{
+  /// Creates an instance of DeleteByLineTextIntent.
+  const DeleteForwardByLineTextIntent();
+}
+
 /// An [Intent] to send the event straight to the engine, but only if a
 /// TextEditingTarget is focused.
 ///