/*
void DemoMode()
{
foldingGenerator = new FoldingElementGenerator() { FoldingManager = fm };
foldingMargin = new FoldingMargin { FoldingManager = fm };
foldingMarginBorder = new Border {
Child = foldingMargin,
Background = new LinearGradientBrush(Colors.White, Colors.Transparent, 0)
};
foldingMarginBorder.SizeChanged += UpdateTextViewClip;
textEditor.TextArea.TextView.ElementGenerators.Add(foldingGenerator);
textEditor.TextArea.LeftMargins.Add(foldingMarginBorder);
}
void UpdateTextViewClip(object sender, SizeChangedEventArgs e)
{
textEditor.TextArea.TextView.Clip = new RectangleGeometry(
new Rect(-foldingMarginBorder.ActualWidth,
0,
textEditor.TextArea.TextView.ActualWidth + foldingMarginBorder.ActualWidth,
textEditor.TextArea.TextView.ActualHeight));
}
*/
public void Uninstall()
{
Clear();
if (textArea != null) {
textArea.Caret.PositionChanged -= textArea_Caret_PositionChanged;
textArea.LeftMargins.Remove(margin);
textArea.TextView.ElementGenerators.Remove(generator);
textArea.TextView.Services.RemoveService(typeof(FoldingManager));
margin = null;
generator = null;
textArea = null;
}
}
public FoldingManagerInstallation(TextArea textArea)
: base(textArea.Document)
{
this.textArea = textArea;
margin = new FoldingMargin() { FoldingManager = this };
generator = new FoldingElementGenerator() { FoldingManager = this };
textArea.LeftMargins.Add(margin);
textArea.TextView.Services.AddService(typeof(FoldingManager), this);
// HACK: folding only works correctly when it has highest priority
textArea.TextView.ElementGenerators.Insert(0, generator);
textArea.Caret.PositionChanged += textArea_Caret_PositionChanged;
}