/// <inheritdoc/>
protected override void OnMouseLeftButtonDown(MouseButtonEventArgs e)
{
base.OnMouseLeftButtonDown(e);
if (!e.Handled && TextView != null && textArea != null)
{
e.Handled = true;
textArea.Focus();
SimpleSegment currentSeg = GetTextLineSegment(e);
if (currentSeg == SimpleSegment.Invalid)
{
return;
}
textArea.Caret.Offset = currentSeg.Offset + currentSeg.Length;
if (CaptureMouse())
{
selecting = true;
selectionStart = new AnchorSegment(Document, currentSeg.Offset, currentSeg.Length);
if ((Keyboard.Modifiers & ModifierKeys.Shift) == ModifierKeys.Shift)
{
SimpleSelection simpleSelection = textArea.Selection as SimpleSelection;
if (simpleSelection != null)
{
selectionStart = new AnchorSegment(Document, simpleSelection.SurroundingSegment);
}
}
textArea.Selection = Selection.Create(textArea, selectionStart);
if ((Keyboard.Modifiers & ModifierKeys.Shift) == ModifierKeys.Shift)
{
ExtendSelection(currentSeg);
}
textArea.Caret.BringCaretToView(5.0);
}
}
}
static void OnSelectAll(object target, ExecutedRoutedEventArgs args)
{
TextArea textArea = GetTextArea(target);
if (textArea != null && textArea.Document != null)
{
args.Handled = true;
textArea.Caret.Offset = textArea.Document.TextLength;
textArea.Selection = SimpleSelection.Create(textArea, 0, textArea.Document.TextLength);
}
}
/// <inheritdoc/>
public override bool Equals(object obj)
{
SimpleSelection other = obj as SimpleSelection;
if (other == null)
{
return(false);
}
return(this.start.Equals(other.start) && this.end.Equals(other.end) &&
this.startOffset == other.startOffset && this.endOffset == other.endOffset &&
this.textArea == other.textArea);
}
static ExecutedRoutedEventHandler OnDelete(CaretMovementType caretMovement)
{
return((target, args) => {
TextArea textArea = GetTextArea(target);
if (textArea != null && textArea.Document != null)
{
if (textArea.Selection.IsEmpty)
{
TextViewPosition startPos = textArea.Caret.Position;
bool enableVirtualSpace = textArea.Options.EnableVirtualSpace;
// When pressing delete; don't move the caret further into virtual space - instead delete the newline
if (caretMovement == CaretMovementType.CharRight)
{
enableVirtualSpace = false;
}
double desiredXPos = textArea.Caret.DesiredXPos;
TextViewPosition endPos = CaretNavigationCommandHandler.GetNewCaretPosition(
textArea.TextView, startPos, caretMovement, enableVirtualSpace, ref desiredXPos);
// GetNewCaretPosition may return (0,0) as new position,
// thus we need to validate endPos before using it in the selection.
if (endPos.Line < 1 || endPos.Column < 1)
{
endPos = new TextViewPosition(Math.Max(endPos.Line, 1), Math.Max(endPos.Column, 1));
}
// Don't select the text to be deleted; just reuse the ReplaceSelectionWithText logic
var sel = new SimpleSelection(textArea, startPos, endPos);
sel.ReplaceSelectionWithText(string.Empty);
}
else
{
textArea.RemoveSelectedText();
}
textArea.Caret.BringCaretToView();
args.Handled = true;
}
});
}