/// <summary>
/// Fetch the next run at element end edge position.
/// ElementEndEdge; we can have 2 possibilities:
/// (1) Close edge of element associated with the text paragraph,
/// create synthetic LineBreak run to end the current line.
/// (2) End of inline element, hide CloseEdge character and continue
/// </summary>
/// <param name="position"></param>
/// Position in current text array
protected TextRun HandleElementEndEdge(StaticTextPointer position)
{
Invariant.Assert(position.GetPointerContext(LogicalDirection.Forward) == TextPointerContext.ElementEnd, "TextPointer does not point to element end edge.");
TextRun run;
if (position.Parent == _paraClient.Paragraph.Element)
{
// (1) Close edge of element associated with the text paragraph,
// create synthetic LineBreak run to end the current line.
run = new ParagraphBreakRun(_syntheticCharacterLength, PTS.FSFLRES.fsflrEndOfParagraph);
}
else
{
TextElement element = (TextElement)position.GetAdjacentElement(LogicalDirection.Forward);
Debug.Assert(element != null, "Element should be here.");
Inline inline = (Inline) element;
DependencyObject parent = inline.Parent;
FlowDirection parentFlowDirection = inline.FlowDirection;
if(parent != null)
{
parentFlowDirection = (FlowDirection)parent.GetValue(FrameworkElement.FlowDirectionProperty);
}
if (inline.FlowDirection != parentFlowDirection)
{
run = new TextEndOfSegment(_elementEdgeCharacterLength);
}
else
{
TextDecorationCollection textDecorations = DynamicPropertyReader.GetTextDecorations(inline);
if (textDecorations == null || textDecorations.Count == 0)
{
// (2) End of inline element, hide CloseEdge character and continue
run = new TextHidden(_elementEdgeCharacterLength);
}
else
{
run = new TextEndOfSegment(_elementEdgeCharacterLength);
}
}
}
return run;
}
// -----------------------------------------------------------------
// Fetch the next run at element close edge position.
//
// position - current position in the text array
// ------------------------------------------------------------------
private TextRun HandleElementEndEdge(StaticTextPointer position)
{
Debug.Assert(position.GetPointerContext(LogicalDirection.Forward) == TextPointerContext.ElementEnd, "TextPointer does not point to element end edge.");
TextRun run = null;
TextElement element = (TextElement)position.GetAdjacentElement(LogicalDirection.Forward);
Debug.Assert(element != null, "Element should be here.");
Inline inline = element as Inline;
if (inline == null)
{
run = new TextHidden(_elementEdgeCharacterLength);
}
else
{
DependencyObject parent = inline.Parent;
FlowDirection parentFlowDirection = inline.FlowDirection;
if(parent != null)
{
parentFlowDirection = (FlowDirection)parent.GetValue(FrameworkElement.FlowDirectionProperty);
}
if (inline.FlowDirection != parentFlowDirection)
{
run = new TextEndOfSegment(_elementEdgeCharacterLength);
}
else
{
TextDecorationCollection textDecorations = DynamicPropertyReader.GetTextDecorations(inline);
if (textDecorations == null || textDecorations.Count == 0)
{
// (2) End of inline element, hide CloseEdge character and continue
run = new TextHidden(_elementEdgeCharacterLength);
}
else
{
run = new TextEndOfSegment(_elementEdgeCharacterLength);
}
}
}
return run;
}