/// <summary>
/// Creates a new TextArea instance.
/// </summary>
protected TextArea(TextView textView)
{
if (textView == null)
{
throw new ArgumentNullException("textView");
}
this.textView = textView;
Options = textView.Options;
selection = emptySelection = new EmptySelection(this);
textView.Services.AddService(typeof(TextArea), this);
textView.LineTransformers.Add(new SelectionColorizer(this));
textView.InsertLayer(new SelectionLayer(this), KnownLayer.Selection, LayerInsertionPosition.Replace);
caret = new Caret(this);
caret.PositionChanged += (sender, e) => RequestSelectionValidation();
caret.PositionChanged += CaretPositionChanged;
AttachTypingEvents();
ime = new ImeSupport(this);
leftMargins.CollectionChanged += leftMargins_CollectionChanged;
DefaultInputHandler = new TextAreaDefaultInputHandler(this);
ActiveInputHandler = DefaultInputHandler;
}
static EditingCommandHandler()
{
CommandBindings.Add(new CommandBinding(ApplicationCommands.Delete, OnDelete(CaretMovementType.None), CanDelete));
AddBinding(EditingCommands.Delete, ModifierKeys.None, Key.Delete, OnDelete(CaretMovementType.CharRight));
AddBinding(EditingCommands.DeleteNextWord, ModifierKeys.Control, Key.Delete, OnDelete(CaretMovementType.WordRight));
AddBinding(EditingCommands.Backspace, ModifierKeys.None, Key.Back, OnDelete(CaretMovementType.Backspace));
InputBindings.Add(TextAreaDefaultInputHandler.CreateFrozenKeyBinding(EditingCommands.Backspace, ModifierKeys.Shift, Key.Back)); // make Shift-Backspace do the same as plain backspace
AddBinding(EditingCommands.DeletePreviousWord, ModifierKeys.Control, Key.Back, OnDelete(CaretMovementType.WordLeft));
AddBinding(EditingCommands.EnterParagraphBreak, ModifierKeys.None, Key.Enter, OnEnter);
AddBinding(EditingCommands.EnterLineBreak, ModifierKeys.Shift, Key.Enter, OnEnter);
AddBinding(EditingCommands.TabForward, ModifierKeys.None, Key.Tab, OnTab);
AddBinding(EditingCommands.TabBackward, ModifierKeys.Shift, Key.Tab, OnShiftTab);
CommandBindings.Add(new CommandBinding(ApplicationCommands.Copy, OnCopy, CanCutOrCopy));
CommandBindings.Add(new CommandBinding(ApplicationCommands.Cut, OnCut, CanCutOrCopy));
CommandBindings.Add(new CommandBinding(ApplicationCommands.Paste, OnPaste, CanPaste));
CommandBindings.Add(new CommandBinding(EditorCommands.ToggleOverstrike, OnToggleOverstrike));
CommandBindings.Add(new CommandBinding(EditorCommands.DeleteLine, OnDeleteLine));
CommandBindings.Add(new CommandBinding(EditorCommands.RemoveLeadingWhitespace, OnRemoveLeadingWhitespace));
CommandBindings.Add(new CommandBinding(EditorCommands.RemoveTrailingWhitespace, OnRemoveTrailingWhitespace));
CommandBindings.Add(new CommandBinding(EditorCommands.ConvertToUppercase, OnConvertToUpperCase));
CommandBindings.Add(new CommandBinding(EditorCommands.ConvertToLowercase, OnConvertToLowerCase));
CommandBindings.Add(new CommandBinding(EditorCommands.ConvertToTitleCase, OnConvertToTitleCase));
CommandBindings.Add(new CommandBinding(EditorCommands.InvertCase, OnInvertCase));
CommandBindings.Add(new CommandBinding(EditorCommands.ConvertTabsToSpaces, OnConvertTabsToSpaces));
CommandBindings.Add(new CommandBinding(EditorCommands.ConvertSpacesToTabs, OnConvertSpacesToTabs));
CommandBindings.Add(new CommandBinding(EditorCommands.ConvertLeadingTabsToSpaces, OnConvertLeadingTabsToSpaces));
CommandBindings.Add(new CommandBinding(EditorCommands.ConvertLeadingSpacesToTabs, OnConvertLeadingSpacesToTabs));
CommandBindings.Add(new CommandBinding(EditorCommands.IndentSelection, OnIndentSelection));
TextAreaDefaultInputHandler.WorkaroundWPFMemoryLeak(InputBindings);
}
static CaretNavigationCommandHandler()
{
const ModifierKeys None = ModifierKeys.None;
const ModifierKeys Ctrl = ModifierKeys.Control;
const ModifierKeys Shift = ModifierKeys.Shift;
const ModifierKeys Alt = ModifierKeys.Alt;
AddBinding(EditingCommands.MoveLeftByCharacter, None, Key.Left, OnMoveCaret(CaretMovementType.CharLeft));
AddBinding(EditingCommands.SelectLeftByCharacter, Shift, Key.Left, OnMoveCaretExtendSelection(CaretMovementType.CharLeft));
AddBinding(RectangleSelection.BoxSelectLeftByCharacter, Alt | Shift, Key.Left, OnMoveCaretBoxSelection(CaretMovementType.CharLeft));
AddBinding(EditingCommands.MoveRightByCharacter, None, Key.Right, OnMoveCaret(CaretMovementType.CharRight));
AddBinding(EditingCommands.SelectRightByCharacter, Shift, Key.Right, OnMoveCaretExtendSelection(CaretMovementType.CharRight));
AddBinding(RectangleSelection.BoxSelectRightByCharacter, Alt | Shift, Key.Right, OnMoveCaretBoxSelection(CaretMovementType.CharRight));
AddBinding(EditingCommands.MoveLeftByWord, Ctrl, Key.Left, OnMoveCaret(CaretMovementType.WordLeft));
AddBinding(EditingCommands.SelectLeftByWord, Ctrl | Shift, Key.Left, OnMoveCaretExtendSelection(CaretMovementType.WordLeft));
AddBinding(RectangleSelection.BoxSelectLeftByWord, Ctrl | Alt | Shift, Key.Left, OnMoveCaretBoxSelection(CaretMovementType.WordLeft));
AddBinding(EditingCommands.MoveRightByWord, Ctrl, Key.Right, OnMoveCaret(CaretMovementType.WordRight));
AddBinding(EditingCommands.SelectRightByWord, Ctrl | Shift, Key.Right, OnMoveCaretExtendSelection(CaretMovementType.WordRight));
AddBinding(RectangleSelection.BoxSelectRightByWord, Ctrl | Alt | Shift, Key.Right, OnMoveCaretBoxSelection(CaretMovementType.WordRight));
AddBinding(EditingCommands.MoveUpByLine, None, Key.Up, OnMoveCaret(CaretMovementType.LineUp));
AddBinding(EditingCommands.SelectUpByLine, Shift, Key.Up, OnMoveCaretExtendSelection(CaretMovementType.LineUp));
AddBinding(RectangleSelection.BoxSelectUpByLine, Alt | Shift, Key.Up, OnMoveCaretBoxSelection(CaretMovementType.LineUp));
AddBinding(EditingCommands.MoveDownByLine, None, Key.Down, OnMoveCaret(CaretMovementType.LineDown));
AddBinding(EditingCommands.SelectDownByLine, Shift, Key.Down, OnMoveCaretExtendSelection(CaretMovementType.LineDown));
AddBinding(RectangleSelection.BoxSelectDownByLine, Alt | Shift, Key.Down, OnMoveCaretBoxSelection(CaretMovementType.LineDown));
AddBinding(EditingCommands.MoveDownByPage, None, Key.PageDown, OnMoveCaret(CaretMovementType.PageDown));
AddBinding(EditingCommands.SelectDownByPage, Shift, Key.PageDown, OnMoveCaretExtendSelection(CaretMovementType.PageDown));
AddBinding(EditingCommands.MoveUpByPage, None, Key.PageUp, OnMoveCaret(CaretMovementType.PageUp));
AddBinding(EditingCommands.SelectUpByPage, Shift, Key.PageUp, OnMoveCaretExtendSelection(CaretMovementType.PageUp));
AddBinding(EditingCommands.MoveToLineStart, None, Key.Home, OnMoveCaret(CaretMovementType.LineStart));
AddBinding(EditingCommands.SelectToLineStart, Shift, Key.Home, OnMoveCaretExtendSelection(CaretMovementType.LineStart));
AddBinding(RectangleSelection.BoxSelectToLineStart, Alt | Shift, Key.Home, OnMoveCaretBoxSelection(CaretMovementType.LineStart));
AddBinding(EditingCommands.MoveToLineEnd, None, Key.End, OnMoveCaret(CaretMovementType.LineEnd));
AddBinding(EditingCommands.SelectToLineEnd, Shift, Key.End, OnMoveCaretExtendSelection(CaretMovementType.LineEnd));
AddBinding(RectangleSelection.BoxSelectToLineEnd, Alt | Shift, Key.End, OnMoveCaretBoxSelection(CaretMovementType.LineEnd));
AddBinding(EditingCommands.MoveToDocumentStart, Ctrl, Key.Home, OnMoveCaret(CaretMovementType.DocumentStart));
AddBinding(EditingCommands.SelectToDocumentStart, Ctrl | Shift, Key.Home, OnMoveCaretExtendSelection(CaretMovementType.DocumentStart));
AddBinding(EditingCommands.MoveToDocumentEnd, Ctrl, Key.End, OnMoveCaret(CaretMovementType.DocumentEnd));
AddBinding(EditingCommands.SelectToDocumentEnd, Ctrl | Shift, Key.End, OnMoveCaretExtendSelection(CaretMovementType.DocumentEnd));
CommandBindings.Add(new CommandBinding(ApplicationCommands.SelectAll, OnSelectAll));
TextAreaDefaultInputHandler.WorkaroundWPFMemoryLeak(InputBindings);
}
private static void AddBinding(ICommand command, ModifierKeys modifiers, Key key, ExecutedRoutedEventHandler handler)
{
CommandBindings.Add(new CommandBinding(command, handler));
InputBindings.Add(TextAreaDefaultInputHandler.CreateFrozenKeyBinding(command, modifiers, key));
}