Browse Source
git-svn-id: svn://svn.sharpdevelop.net/sharpdevelop/trunk@3889 1ccf3a8d-04fe-1044-b7c0-cef0b8235c61shortcuts
Daniel Grunwald
17 years ago
27 changed files with 765 additions and 184 deletions
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// <file>
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// <copyright see="prj:///doc/copyright.txt"/>
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// <license see="prj:///doc/license.txt"/>
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// <author name="Daniel Grunwald"/>
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// <version>$Revision$</version>
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// </file>
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using System; |
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using System.Windows.Input; |
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using ICSharpCode.AvalonEdit.Document; |
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namespace ICSharpCode.AvalonEdit.Gui |
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{ |
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/// <summary>
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/// Contains the predefined input handlers.
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/// </summary>
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public class TextAreaDefaultInputHandler : TextAreaInputHandler |
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{ |
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/// <summary>
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/// Gets the caret navigation input handler.
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/// </summary>
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public TextAreaInputHandler CaretNavigation { get; private set; } |
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/// <summary>
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/// Gets the editing input handler.
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/// </summary>
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public TextAreaInputHandler Editing { get; private set; } |
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/// <summary>
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/// Gets the mouse selection input handler.
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/// </summary>
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public ITextAreaInputHandler MouseSelection { get; private set; } |
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/// <summary>
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/// Creates a new TextAreaDefaultInputHandler instance.
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/// </summary>
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public TextAreaDefaultInputHandler(TextArea textArea) : base(textArea) |
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{ |
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this.NestedInputHandlers.Add(CaretNavigation = CaretNavigationCommandHandler.Create(textArea)); |
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this.NestedInputHandlers.Add(Editing = EditingCommandHandler.Create(textArea)); |
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this.NestedInputHandlers.Add(MouseSelection = new SelectionMouseHandler(textArea)); |
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this.CommandBindings.Add(new CommandBinding(ApplicationCommands.Undo, ExecuteUndo, CanExecuteUndo)); |
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this.CommandBindings.Add(new CommandBinding(ApplicationCommands.Redo, ExecuteRedo, CanExecuteRedo)); |
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} |
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#region Undo / Redo
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UndoStack GetUndoStack() |
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{ |
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TextDocument document = this.TextArea.Document; |
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if (document != null) |
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return document.UndoStack; |
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else |
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return null; |
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} |
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void ExecuteUndo(object sender, ExecutedRoutedEventArgs e) |
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{ |
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var undoStack = GetUndoStack(); |
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if (undoStack != null && undoStack.CanUndo) |
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undoStack.Undo(); |
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} |
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void CanExecuteUndo(object sender, CanExecuteRoutedEventArgs e) |
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{ |
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var undoStack = GetUndoStack(); |
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e.CanExecute = undoStack != null && undoStack.CanUndo; |
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} |
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void ExecuteRedo(object sender, ExecutedRoutedEventArgs e) |
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{ |
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var undoStack = GetUndoStack(); |
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if (undoStack != null && undoStack.CanRedo) |
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undoStack.Redo(); |
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} |
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void CanExecuteRedo(object sender, CanExecuteRoutedEventArgs e) |
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{ |
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var undoStack = GetUndoStack(); |
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e.CanExecute = undoStack != null && undoStack.CanRedo; |
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} |
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#endregion
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} |
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} |
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@ -0,0 +1,184 @@ |
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// <file>
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// <copyright see="prj:///doc/copyright.txt"/>
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// <license see="prj:///doc/license.txt"/>
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// <author name="Daniel Grunwald"/>
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// <version>$Revision$</version>
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// </file>
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using ICSharpCode.AvalonEdit.Utils; |
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using System; |
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using System.Collections.Generic; |
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using System.Collections.ObjectModel; |
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using System.Windows.Input; |
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namespace ICSharpCode.AvalonEdit.Gui |
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{ |
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/// <summary>
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/// A set of input bindings and event handlers for the text area.
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/// </summary>
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public interface ITextAreaInputHandler |
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{ |
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/// <summary>
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/// Gets the text area that the input handler belongs to.
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/// </summary>
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TextArea TextArea { |
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get; |
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} |
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/// <summary>
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/// Attaches an input handler to the text area.
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/// </summary>
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void Attach(); |
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/// <summary>
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/// Detaches the input handler from the text area.
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/// </summary>
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void Detach(); |
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} |
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/// <summary>
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/// Default-implementation of <see cref="ITextAreaInputHandler"/>.
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/// </summary>
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public class TextAreaInputHandler : ITextAreaInputHandler |
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{ |
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readonly ObserveAddRemoveCollection<CommandBinding> commandBindings; |
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readonly ObserveAddRemoveCollection<InputBinding> inputBindings; |
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readonly ObserveAddRemoveCollection<ITextAreaInputHandler> nestedInputHandlers; |
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readonly TextArea textArea; |
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bool isAttached; |
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/// <summary>
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/// Creates a new TextAreaInputHandler.
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/// </summary>
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public TextAreaInputHandler(TextArea textArea) |
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{ |
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if (textArea == null) |
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throw new ArgumentNullException("textArea"); |
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this.textArea = textArea; |
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commandBindings = new ObserveAddRemoveCollection<CommandBinding>(CommandBinding_Added, CommandBinding_Removed); |
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inputBindings = new ObserveAddRemoveCollection<InputBinding>(InputBinding_Added, InputBinding_Removed); |
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nestedInputHandlers = new ObserveAddRemoveCollection<ITextAreaInputHandler>(NestedInputHandler_Added, NestedInputHandler_Removed); |
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} |
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/// <inheritdoc/>
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public TextArea TextArea { |
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get { return textArea; } |
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} |
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/// <summary>
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/// Gets whether the input handler is currently attached to the text area.
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/// </summary>
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public bool IsAttached { |
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get { return isAttached; } |
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} |
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#region CommandBindings / InputBindings
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/// <summary>
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/// Gets the command bindings of this input handler.
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/// </summary>
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public ICollection<CommandBinding> CommandBindings { |
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get { return commandBindings; } |
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} |
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void CommandBinding_Added(CommandBinding commandBinding) |
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{ |
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if (isAttached) |
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textArea.CommandBindings.Add(commandBinding); |
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} |
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void CommandBinding_Removed(CommandBinding commandBinding) |
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{ |
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if (isAttached) |
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textArea.CommandBindings.Remove(commandBinding); |
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} |
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/// <summary>
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/// Gets the input bindings of this input handler.
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/// </summary>
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public ICollection<InputBinding> InputBindings { |
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get { return inputBindings; } |
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} |
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void InputBinding_Added(InputBinding inputBinding) |
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{ |
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if (isAttached) |
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textArea.InputBindings.Add(inputBinding); |
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} |
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void InputBinding_Removed(InputBinding inputBinding) |
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{ |
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if (isAttached) |
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textArea.InputBindings.Remove(inputBinding); |
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} |
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/// <summary>
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/// Adds a command and input binding.
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/// </summary>
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/// <param name="command">The command ID.</param>
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/// <param name="modifiers">The modifiers of the keyboard shortcut.</param>
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/// <param name="key">The key of the keyboard shortcut.</param>
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/// <param name="handler">The event handler to run when the command is executed.</param>
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protected void AddBinding(ICommand command, ModifierKeys modifiers, Key key, ExecutedRoutedEventHandler handler) |
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{ |
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this.CommandBindings.Add(new CommandBinding(command, handler)); |
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this.InputBindings.Add(new KeyBinding(command, key, modifiers)); |
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} |
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#endregion
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#region NestedInputHandlers
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/// <summary>
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/// Gets the collection of nested input handlers. NestedInputHandlers are activated and deactivated
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/// together with this input handler.
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/// </summary>
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public ICollection<ITextAreaInputHandler> NestedInputHandlers { |
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get { return nestedInputHandlers; } |
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} |
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void NestedInputHandler_Added(ITextAreaInputHandler handler) |
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{ |
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if (handler == null) |
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throw new ArgumentNullException("handler"); |
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if (handler.TextArea != textArea) |
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throw new ArgumentException("The nested handler must be working for the same text area!"); |
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if (isAttached) |
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handler.Attach(); |
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} |
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void NestedInputHandler_Removed(ITextAreaInputHandler handler) |
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{ |
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if (isAttached) |
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handler.Detach(); |
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} |
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#endregion
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#region Attach/Detach
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/// <inheritdoc/>
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public virtual void Attach() |
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{ |
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if (isAttached) |
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throw new InvalidOperationException("Input handler is already attached"); |
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isAttached = true; |
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textArea.CommandBindings.AddRange(commandBindings); |
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textArea.InputBindings.AddRange(inputBindings); |
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foreach (ITextAreaInputHandler handler in nestedInputHandlers) |
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handler.Attach(); |
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} |
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/// <inheritdoc/>
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public virtual void Detach() |
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{ |
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if (!isAttached) |
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throw new InvalidOperationException("Input handler is not attached"); |
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isAttached = false; |
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foreach (CommandBinding b in commandBindings) |
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textArea.CommandBindings.Remove(b); |
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foreach (InputBinding b in inputBindings) |
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textArea.InputBindings.Remove(b); |
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foreach (ITextAreaInputHandler handler in nestedInputHandlers) |
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handler.Detach(); |
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} |
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#endregion
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} |
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} |
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@ -0,0 +1,64 @@ |
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// <file>
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// <copyright see="prj:///doc/copyright.txt"/>
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// <license see="prj:///doc/license.txt"/>
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// <author name="Daniel Grunwald"/>
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// <version>$Revision$</version>
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// </file>
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using System; |
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using System.Collections.ObjectModel; |
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namespace ICSharpCode.AvalonEdit.Utils |
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{ |
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/// <summary>
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/// A collection where adding and removing items causes a callback.
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/// </summary>
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sealed class ObserveAddRemoveCollection<T> : Collection<T> |
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{ |
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readonly Action<T> onAdd, onRemove; |
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public ObserveAddRemoveCollection(Action<T> onAdd, Action<T> onRemove) |
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{ |
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this.onAdd = onAdd; |
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this.onRemove = onRemove; |
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} |
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protected override void ClearItems() |
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{ |
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if (onRemove != null) { |
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foreach (T val in this) |
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onRemove(val); |
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} |
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base.ClearItems(); |
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} |
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protected override void InsertItem(int index, T item) |
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{ |
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if (onAdd != null) |
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onAdd(item); |
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base.InsertItem(index, item); |
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} |
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protected override void RemoveItem(int index) |
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{ |
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if (onRemove != null) |
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onRemove(this[index]); |
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base.RemoveItem(index); |
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} |
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protected override void SetItem(int index, T item) |
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{ |
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if (onRemove != null) |
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onRemove(this[index]); |
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try { |
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if (onAdd != null) |
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onAdd(item); |
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} catch { |
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// when adding the new item fails, just remove the old one
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base.RemoveAt(index); |
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throw; |
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} |
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base.SetItem(index, item); |
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} |
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} |
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} |
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