/// <summary>
/// Called when ContextMenuOpening is raised on FlowDocument viewer element.
/// </summary>
internal static void OnContextMenuOpening(FlowDocument document, Control viewer, ContextMenuEventArgs e)
{
// Get ContextMenu from TargetElement, if exests. Otherwise get ContextMenu from the viewer.
ContextMenu cm = null;
if (e.TargetElement != null)
{
cm = e.TargetElement.GetValue(FrameworkElement.ContextMenuProperty) as ContextMenu;
}
if (cm == null)
{
cm = viewer.ContextMenu;
}
// Add special handling for ContextMenu, if invoked through a hotkey.
if (cm != null)
{
if (document != null)
{
// A negative offset for e.CursorLeft means the user invoked
// the menu with a hotkey (shift-F10).
// For this case place the menu relative to Selection.Start,
// otherwise do not modify it.
if (DoubleUtil.LessThan(e.CursorLeft, 0))
{
// Retrieve desired ContextMenu position. If the TextSelection is not empty and visible,
// use selection start position. Otherwise prefer TargetElements's start, if provided.
ITextContainer textContainer = (ITextContainer)((IServiceProvider)document).GetService(typeof(ITextContainer));
ITextPointer contextMenuPosition = null;
if (textContainer.TextSelection != null)
{
if ((textContainer.TextSelection.IsEmpty || !textContainer.TextSelection.TextEditor.UiScope.IsFocused) &&
e.TargetElement is TextElement)
{
contextMenuPosition = ((TextElement)e.TargetElement).ContentStart;
}
else
{
// Selection start is always normalized to have backward LogicalDirection. However, if selection starts at the beginning
// of a line this will cause the text view to return rectangle on the previous line. So we need to switch logical direction.
contextMenuPosition = textContainer.TextSelection.Start.CreatePointer(LogicalDirection.Forward);
}
}
else if (e.TargetElement is TextElement)
{
contextMenuPosition = ((TextElement)e.TargetElement).ContentStart;
}
// If ContextMenu position has been found and it is visible, show ContextMenu there.
// Otherwise let default ContextMenu handling logic handle this event.
ITextView textView = textContainer.TextView;
if (contextMenuPosition != null && textView != null && textView.IsValid && textView.Contains(contextMenuPosition))
{
Rect positionRect = textView.GetRectangleFromTextPosition(contextMenuPosition);
if (positionRect != Rect.Empty)
{
positionRect = DocumentViewerHelper.CalculateVisibleRect(positionRect, textView.RenderScope);
if (positionRect != Rect.Empty)
{
GeneralTransform transform = textView.RenderScope.TransformToAncestor(viewer);
Point contextMenuOffset = transform.Transform(positionRect.BottomLeft);
cm.Placement = PlacementMode.Relative;
cm.PlacementTarget = viewer;
cm.HorizontalOffset = contextMenuOffset.X;
cm.VerticalOffset = contextMenuOffset.Y;
cm.IsOpen = true;
e.Handled = true;
}
}
}
}
}
if (!e.Handled)
{
// Since we are not handling ContextMenu, clear all the values that
// could be set through explicit handling.
cm.ClearValue(ContextMenu.PlacementProperty);
cm.ClearValue(ContextMenu.PlacementTargetProperty);
cm.ClearValue(ContextMenu.HorizontalOffsetProperty);
cm.ClearValue(ContextMenu.VerticalOffsetProperty);
}
}
}
// Token: 0x06006FD7 RID: 28631 RVA: 0x00202514 File Offset: 0x00200714
internal static void OnContextMenuOpening(FlowDocument document, Control viewer, ContextMenuEventArgs e)
{
ContextMenu contextMenu = null;
if (e.TargetElement != null)
{
contextMenu = (e.TargetElement.GetValue(FrameworkElement.ContextMenuProperty) as ContextMenu);
}
if (contextMenu == null)
{
contextMenu = viewer.ContextMenu;
}
if (contextMenu != null)
{
if (document != null && DoubleUtil.LessThan(e.CursorLeft, 0.0))
{
ITextContainer textContainer = (ITextContainer)((IServiceProvider)document).GetService(typeof(ITextContainer));
ITextPointer textPointer = null;
if (textContainer.TextSelection != null)
{
if ((textContainer.TextSelection.IsEmpty || !textContainer.TextSelection.TextEditor.UiScope.IsFocused) && e.TargetElement is TextElement)
{
textPointer = ((TextElement)e.TargetElement).ContentStart;
}
else
{
textPointer = textContainer.TextSelection.Start.CreatePointer(LogicalDirection.Forward);
}
}
else if (e.TargetElement is TextElement)
{
textPointer = ((TextElement)e.TargetElement).ContentStart;
}
ITextView textView = textContainer.TextView;
if (textPointer != null && textView != null && textView.IsValid && textView.Contains(textPointer))
{
Rect rect = textView.GetRectangleFromTextPosition(textPointer);
if (rect != Rect.Empty)
{
rect = DocumentViewerHelper.CalculateVisibleRect(rect, textView.RenderScope);
if (rect != Rect.Empty)
{
GeneralTransform generalTransform = textView.RenderScope.TransformToAncestor(viewer);
Point point = generalTransform.Transform(rect.BottomLeft);
contextMenu.Placement = PlacementMode.Relative;
contextMenu.PlacementTarget = viewer;
contextMenu.HorizontalOffset = point.X;
contextMenu.VerticalOffset = point.Y;
contextMenu.IsOpen = true;
e.Handled = true;
}
}
}
}
if (!e.Handled)
{
contextMenu.ClearValue(ContextMenu.PlacementProperty);
contextMenu.ClearValue(ContextMenu.PlacementTargetProperty);
contextMenu.ClearValue(ContextMenu.HorizontalOffsetProperty);
contextMenu.ClearValue(ContextMenu.VerticalOffsetProperty);
}
}
}