private static void OnCut(Object sender, ExecutedRoutedEventArgs e)
{
EditView editor = sender as EditView;
if (editor != null && editor.Document != null)
{
String targetText = String.Empty;
if (editor.Selection.IsEmpty)
{
// 剪切整行
CopyWholeLine(editor);
editor.SelectLine();
}
else
{
// 剪切选中的文字
CopySelectedText(editor);
}
using (editor.Document.AutoUpdate())
{
editor.RemoveSelection();
editor.Redraw();
}
e.Handled = true;
}
}
public InputHandlerGroup(EditView owner)
{
_owner = owner ?? throw new ArgumentNullException("owner");
_attached = false;
_children = new ObservableCollection <IInputHandler>();
_children.CollectionChanged += OnChildrenChanged;
}
public AnchorSelection(EditView owner, TextAnchor startAnchor, TextAnchor endAnchor)
: base(owner)
{
_startAnchor = startAnchor ?? throw new ArgumentNullException("startAnchor");
_startAnchor.MovementType = AnchorMovementType.AfterInsertion;
_endAnchor = endAnchor ?? throw new ArgumentNullException("endAnchor");
_endAnchor.MovementType = AnchorMovementType.AfterInsertion;
}
public SelectionMouseHandler(EditView owner)
{
_owner = owner ?? throw new ArgumentNullException("owner");
_scrollingTimer = new DispatcherTimer(DispatcherPriority.Input);
_scrollingTimer.Interval = TimeSpan.FromSeconds(0.1);
_scrollingTimer.Tick += OnScrolling;
_scrolling = false;
}
public InputCommandsHandler(EditView owner)
{
_owner = owner ?? throw new ArgumentNullException("owner");
_commandBindings = new ObservableCollection <CommandBinding>();
_commandBindings.CollectionChanged += OnCommandBindingsChanged;
_inputBindings = new ObservableCollection <InputBinding>();
_inputBindings.CollectionChanged += OnInputBindingsChanged;
_attached = false;
}
private static void CanRedo(Object sender, CanExecuteRoutedEventArgs e)
{
EditView editor = sender as EditView;
if (editor != null && editor.Document != null && editor.IsFocused)
{
e.CanExecute = editor.CanRedo() && editor.Document.CanRedo();
e.Handled = true;
}
}
private static void OnCancelSelection(Object sender, ExecutedRoutedEventArgs e)
{
if (e.Handled)
{
return;
}
EditView editor = sender as EditView;
editor.CancelSelection();
editor.Redraw();
e.Handled = true;
}
private static void OnRedo(Object sender, ExecutedRoutedEventArgs e)
{
EditView editor = sender as EditView;
if (editor != null && editor.Document != null)
{
editor.Redo();
editor.MoveCaretInVisual();
editor.Redraw();
e.Handled = true;
}
}
private static ExecutedRoutedEventHandler CaretHandler(CaretMovementType caretMovementType, Boolean doSelect)
{
return((sender, e) =>
{
if (e.Handled)
{
return;
}
EditView editor = sender as EditView;
editor.MoveCaret(caretMovementType, doSelect);
editor.Redraw();
e.Handled = true;
});
}
internal static IInputHandler CreateHandler(EditView owner)
{
var handler = new InputCommandsHandler(owner);
foreach (CommandBinding binding in _commandBindings)
{
handler.CommandBindings.Add(binding);
}
foreach (InputBinding binding in _inputBindings)
{
handler.InputBindings.Add(binding);
}
return(handler);
}
private static void CopySelectedText(EditView editor)
{
String text = editor.Document.GetTextAt(editor.Selection.StartOffset, editor.Selection.Length);
var obj = new DataObject(text);
try
{
Clipboard.SetDataObject(obj, true);
}
catch (ExternalException)
{
// 有时候会莫名其妙抛出这个异常，微软的控件都是忽略这个异常，所以这里也做同样的事
return;
}
}
private static void OnEnter(Object sender, ExecutedRoutedEventArgs e)
{
if (e.Handled)
{
return;
}
EditView editor = sender as EditView;
if (editor != null && editor.Document != null)
{
using (editor.Document.AutoUpdate())
{
editor.InsertText(CommonUtilities.LineBreak);
editor.Caret.RestartAnimation();
editor.Redraw();
}
e.Handled = true;
}
}
private static void CopyWholeLine(EditView editor)
{
DocumentLine line = editor.Document.GetLineByOffset(editor.Caret.DocumentOffset);
String lineText = editor.Document.GetTextAt(line.StartOffset, line._exactLength);
var obj = new DataObject(lineText);
MemoryStream ms = new MemoryStream(1);
ms.WriteByte(1);
obj.SetData(LineCopyFormat, ms, false);
try
{
Clipboard.SetDataObject(obj, true);
}
catch (ExternalException)
{
// 有时候会莫名其妙抛出这个异常，微软的控件都是忽略这个异常，所以这里也做同样的事
return;
}
}
private static void OnTabBackward(Object sender, ExecutedRoutedEventArgs e)
{
if (e.Handled)
{
return;
}
EditView editor = sender as EditView;
if (editor != null && editor.Document != null)
{
using (editor.Document.AutoUpdate())
{
editor.TabBackward();
editor.Caret.RestartAnimation();
editor.Redraw();
}
e.Handled = true;
}
}
private static void OnCopy(Object sender, ExecutedRoutedEventArgs e)
{
EditView editor = sender as EditView;
if (editor != null && editor.Document != null)
{
String targetText = String.Empty;
if (editor.Selection.IsEmpty)
{
// 拷贝整行
CopyWholeLine(editor);
}
else
{
// 拷贝选中的文字
CopySelectedText(editor);
}
e.Handled = true;
}
}
private static void OnPaste(Object sender, ExecutedRoutedEventArgs e)
{
EditView editor = sender as EditView;
if (editor != null && editor.Document != null)
{
IDataObject obj = null;
try
{
obj = Clipboard.GetDataObject();
}
catch (ExternalException)
{
return;
}
if (obj == null)
{
return;
}
String text = (String)obj.GetData(DataFormats.UnicodeText);
text = CommonUtilities.NormalizeText(new StringReader(text));
if (!String.IsNullOrEmpty(text))
{
using (editor.Document.AutoUpdate())
{
if (obj.GetDataPresent(LineCopyFormat))
{
// 粘贴整行
editor.InsertLine(text);
editor.Redraw();
}
else
{
editor.InsertText(text);
editor.Redraw();
}
}
}
e.Handled = true;
}
}
/// <summary>
/// 统一处理成删除selection，command是一个selection相关的命令。
/// </summary>
/// <param name="command"></param>
/// <returns></returns>
private static ExecutedRoutedEventHandler RemoveHandler(RoutedUICommand command)
{
return((sender, e) =>
{
if (e.Handled)
{
return;
}
EditView editor = sender as EditView;
if (editor != null && editor.Document != null)
{
using (editor.Document.AutoUpdate())
{
if (editor.Selection.IsEmpty)
{
command.Execute(e.Parameter, editor);
}
editor.RemoveSelection();
editor.Redraw();
}
e.Handled = true;
}
});
}
public FreeSelection(EditView owner)
: base(owner)
{
_startOffset = _endOffset = 0;
}