/// <summary>
/// Creates a new TextArea instance.
/// </summary>
protected TextArea(TextView textView)
{
TextView = textView ?? throw new ArgumentNullException(nameof(textView));
Options = textView.Options;
_selection = EmptySelection = new EmptySelection(this);
textView.Services.AddService(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();
LeftMargins.CollectionChanged += LeftMargins_CollectionChanged;
DefaultInputHandler = new TextAreaDefaultInputHandler(this);
ActiveInputHandler = DefaultInputHandler;
textView.GetObservableWithHistory(TextBlock.FontSizeProperty).Subscribe(fontSizeChange =>
{
TextView.SetScrollOffset(new Vector(_offset.X, _offset.Y * TextView.DefaultLineHeight));
});
}
static EditingCommandHandler()
{
AddBinding(EditingCommands.Delete, InputModifiers.None, Key.Delete, OnDelete(CaretMovementType.CharRight));
AddBinding(EditingCommands.DeleteNextWord, InputModifiers.Control, Key.Delete,
OnDelete(CaretMovementType.WordRight));
AddBinding(EditingCommands.Backspace, InputModifiers.None, Key.Back, OnDelete(CaretMovementType.Backspace));
KeyBindings.Add(
TextAreaDefaultInputHandler.CreateKeyBinding(EditingCommands.Backspace, InputModifiers.Shift,
Key.Back)); // make Shift-Backspace do the same as plain backspace
AddBinding(EditingCommands.DeletePreviousWord, InputModifiers.Control, Key.Back,
OnDelete(CaretMovementType.WordLeft));
AddBinding(EditingCommands.EnterParagraphBreak, InputModifiers.None, Key.Enter, OnEnter);
AddBinding(EditingCommands.EnterLineBreak, InputModifiers.Shift, Key.Enter, OnEnter);
AddBinding(EditingCommands.TabForward, InputModifiers.None, Key.Tab, OnTab);
AddBinding(EditingCommands.TabBackward, InputModifiers.Shift, Key.Tab, OnShiftTab);
AddBinding(ApplicationCommands.Copy, OnCopy, CanCutOrCopy);
AddBinding(ApplicationCommands.Cut, OnCut, CanCutOrCopy);
AddBinding(ApplicationCommands.Paste, OnPaste, CanPaste);
AddBinding(AvaloniaEditCommands.ToggleOverstrike, OnToggleOverstrike);
AddBinding(AvaloniaEditCommands.DeleteLine, OnDeleteLine);
AddBinding(AvaloniaEditCommands.RemoveLeadingWhitespace, OnRemoveLeadingWhitespace);
AddBinding(AvaloniaEditCommands.RemoveTrailingWhitespace, OnRemoveTrailingWhitespace);
AddBinding(AvaloniaEditCommands.ConvertToUppercase, OnConvertToUpperCase);
AddBinding(AvaloniaEditCommands.ConvertToLowercase, OnConvertToLowerCase);
AddBinding(AvaloniaEditCommands.ConvertToTitleCase, OnConvertToTitleCase);
AddBinding(AvaloniaEditCommands.InvertCase, OnInvertCase);
AddBinding(AvaloniaEditCommands.ConvertTabsToSpaces, OnConvertTabsToSpaces);
AddBinding(AvaloniaEditCommands.ConvertSpacesToTabs, OnConvertSpacesToTabs);
AddBinding(AvaloniaEditCommands.ConvertLeadingTabsToSpaces, OnConvertLeadingTabsToSpaces);
AddBinding(AvaloniaEditCommands.ConvertLeadingSpacesToTabs, OnConvertLeadingSpacesToTabs);
AddBinding(AvaloniaEditCommands.IndentSelection, OnIndentSelection);
}
/// <summary>
/// Creates a new TextArea instance.
/// </summary>
protected TextArea(TextView textView)
{
TextView = textView ?? throw new ArgumentNullException(nameof(textView));
Options = textView.Options;
_selection = EmptySelection = new EmptySelection(this);
textView.Services.AddService(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();
LeftMargins.CollectionChanged += LeftMargins_CollectionChanged;
DefaultInputHandler = new TextAreaDefaultInputHandler(this);
ActiveInputHandler = DefaultInputHandler;
}
private static void AddBinding(RoutedCommand command, KeyModifiers modifiers, Key key,
EventHandler <ExecutedRoutedEventArgs> handler)
{
CommandBindings.Add(new RoutedCommandBinding(command, handler));
KeyBindings.Add(TextAreaDefaultInputHandler.CreateKeyBinding(command, modifiers, key));
}
private static void AddBinding(RoutedCommand command, KeyGesture gesture, EventHandler <ExecutedRoutedEventArgs> handler)
{
AddBinding(command, handler);
KeyBindings.Add(TextAreaDefaultInputHandler.CreateKeyBinding(command, gesture));
}