/// <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);
}
// Token: 0x0600688F RID: 26767 RVA: 0x001D802C File Offset: 0x001D622C
protected TextRun HandleElementEndEdge(StaticTextPointer position)
{
Invariant.Assert(position.GetPointerContext(LogicalDirection.Forward) == TextPointerContext.ElementEnd, "TextPointer does not point to element end edge.");
TextRun result;
if (position.Parent == this._paraClient.Paragraph.Element)
{
result = new ParagraphBreakRun(LineBase._syntheticCharacterLength, PTS.FSFLRES.fsflrEndOfParagraph);
}
else
{
TextElement textElement = (TextElement)position.GetAdjacentElement(LogicalDirection.Forward);
Inline inline = (Inline)textElement;
DependencyObject parent = inline.Parent;
FlowDirection flowDirection = inline.FlowDirection;
if (parent != null)
{
flowDirection = (FlowDirection)parent.GetValue(FrameworkElement.FlowDirectionProperty);
}
if (inline.FlowDirection != flowDirection)
{
result = new TextEndOfSegment(LineBase._elementEdgeCharacterLength);
}
else
{
TextDecorationCollection textDecorations = DynamicPropertyReader.GetTextDecorations(inline);
if (textDecorations == null || textDecorations.Count == 0)
{
result = new TextHidden(LineBase._elementEdgeCharacterLength);
}
else
{
result = new TextEndOfSegment(LineBase._elementEdgeCharacterLength);
}
}
}
return(result);
}
/// <summary>
/// Return next TextRun at element edge start position
/// </summary>
/// <param name="position">
/// Current position in text array
/// </param>
protected TextRun HandleElementStartEdge(StaticTextPointer position)
{
Invariant.Assert(position.GetPointerContext(LogicalDirection.Forward) == TextPointerContext.ElementStart, "TextPointer does not point to element start edge.");
// In the future, handle visibility collapsed.
TextRun run = null;
TextElement element = (TextElement)position.GetAdjacentElement(LogicalDirection.Forward);
Debug.Assert(element != null, "Cannot use ITextContainer that does not provide TextElement instances.");
Invariant.Assert(!(element is Block), "We do not expect any Blocks inside Paragraphs");
// Treat figure and floaters as special hidden runs.
if (element is Figure || element is Floater)
{
// Get the length of the element
int cch = TextContainerHelper.GetElementLength(_paraClient.Paragraph.StructuralCache.TextContainer, element);
// Create special hidden run.
run = new FloatingRun(cch, element is Figure);
if (element is Figure)
{
_hasFigures = true;
}
else
{
_hasFloaters = true;
}
}
else if (element is LineBreak)
{
int cch = TextContainerHelper.GetElementLength(_paraClient.Paragraph.StructuralCache.TextContainer, element);
run = new LineBreakRun(cch, PTS.FSFLRES.fsflrSoftBreak);
}
else if (element.IsEmpty)
{
// Empty TextElement should affect line metrics.
// TextFormatter does not support this feature right now, so as workaround
// TextRun with ZERO WIDTH SPACE is used.
TextProperties textProps = new TextProperties(element, position, false /* inline objects */, true /* get background */,
_paraClient.Paragraph.StructuralCache.TextFormatterHost.PixelsPerDip);
char[] textBuffer = new char[_elementEdgeCharacterLength * 2];
// Assert that _elementEdgeCharacterLength is 1 before we use hard-coded indices
Invariant.Assert(_elementEdgeCharacterLength == 1, "Expected value of _elementEdgeCharacterLength is 1");
textBuffer[0] = (char)0x200B;
textBuffer[1] = (char)0x200B;
run = new TextCharacters(textBuffer, 0, textBuffer.Length, textProps);
}
else
{
Inline inline = (Inline)element;
DependencyObject parent = inline.Parent;
FlowDirection inlineFlowDirection = inline.FlowDirection;
FlowDirection parentFlowDirection = inlineFlowDirection;
TextDecorationCollection inlineTextDecorations = DynamicPropertyReader.GetTextDecorations(inline);
if (parent != null)
{
parentFlowDirection = (FlowDirection)parent.GetValue(FrameworkElement.FlowDirectionProperty);
}
if (inlineFlowDirection != parentFlowDirection)
{
// Inline's flow direction is different from its parent. Need to create new TextSpanModifier with flow direction
if (inlineTextDecorations == null || inlineTextDecorations.Count == 0)
{
run = new TextSpanModifier(
_elementEdgeCharacterLength,
null,
null,
inlineFlowDirection
);
}
else
{
run = new TextSpanModifier(
_elementEdgeCharacterLength,
inlineTextDecorations,
inline.Foreground,
inlineFlowDirection
);
}
}
else
{
if (inlineTextDecorations == null || inlineTextDecorations.Count == 0)
{
run = new TextHidden(_elementEdgeCharacterLength);
}
else
{
run = new TextSpanModifier(
_elementEdgeCharacterLength,
inlineTextDecorations,
inline.Foreground
);
}
}
}
return(run);
}
// Token: 0x0600688E RID: 26766 RVA: 0x001D7E38 File Offset: 0x001D6038
protected TextRun HandleElementStartEdge(StaticTextPointer position)
{
Invariant.Assert(position.GetPointerContext(LogicalDirection.Forward) == TextPointerContext.ElementStart, "TextPointer does not point to element start edge.");
TextElement textElement = (TextElement)position.GetAdjacentElement(LogicalDirection.Forward);
Invariant.Assert(!(textElement is Block), "We do not expect any Blocks inside Paragraphs");
TextRun result;
if (textElement is Figure || textElement is Floater)
{
int elementLength = TextContainerHelper.GetElementLength(this._paraClient.Paragraph.StructuralCache.TextContainer, textElement);
result = new FloatingRun(elementLength, textElement is Figure);
if (textElement is Figure)
{
this._hasFigures = true;
}
else
{
this._hasFloaters = true;
}
}
else if (textElement is LineBreak)
{
int elementLength2 = TextContainerHelper.GetElementLength(this._paraClient.Paragraph.StructuralCache.TextContainer, textElement);
result = new LineBreakRun(elementLength2, PTS.FSFLRES.fsflrSoftBreak);
}
else if (textElement.IsEmpty)
{
TextProperties textRunProperties = new TextProperties(textElement, position, false, true, this._paraClient.Paragraph.StructuralCache.TextFormatterHost.PixelsPerDip);
char[] array = new char[LineBase._elementEdgeCharacterLength * 2];
Invariant.Assert(LineBase._elementEdgeCharacterLength == 1, "Expected value of _elementEdgeCharacterLength is 1");
array[0] = '';
array[1] = '';
result = new TextCharacters(array, 0, array.Length, textRunProperties);
}
else
{
Inline inline = (Inline)textElement;
DependencyObject parent = inline.Parent;
FlowDirection flowDirection = inline.FlowDirection;
FlowDirection flowDirection2 = flowDirection;
TextDecorationCollection textDecorations = DynamicPropertyReader.GetTextDecorations(inline);
if (parent != null)
{
flowDirection2 = (FlowDirection)parent.GetValue(FrameworkElement.FlowDirectionProperty);
}
if (flowDirection != flowDirection2)
{
if (textDecorations == null || textDecorations.Count == 0)
{
result = new TextSpanModifier(LineBase._elementEdgeCharacterLength, null, null, flowDirection);
}
else
{
result = new TextSpanModifier(LineBase._elementEdgeCharacterLength, textDecorations, inline.Foreground, flowDirection);
}
}
else if (textDecorations == null || textDecorations.Count == 0)
{
result = new TextHidden(LineBase._elementEdgeCharacterLength);
}
else
{
result = new TextSpanModifier(LineBase._elementEdgeCharacterLength, textDecorations, inline.Foreground);
}
}
return(result);
}
