/// <summary>
/// Returns the closest neighboring TextPointer in an indicated
/// direction where a property value calculated from an embedded
/// object, scoping text element, or scoping highlight could
/// change.
/// </summary>
/// <param name="textPosition">
/// Position to query.
/// </param>
/// <param name="direction">
/// Direction of content to query.
/// </param>
/// <returns>
/// If the following symbol is TextPointerContext.EmbeddedElement,
/// TextPointerContext.ElementBegin, or TextPointerContext.ElementEnd, returns
/// a TextPointer exactly one symbol distant.
///
/// If the following symbol is TextPointerContext.Text, the distance
/// of the returned TextPointer is the minimum of the value returned
/// by textPosition.GetTextLength and the distance to any highlight
/// start or end edge.
///
/// If the following symbol is TextPointerContext.None, returns null.
/// </returns>
internal virtual StaticTextPointer GetNextPropertyChangePosition(StaticTextPointer textPosition, LogicalDirection direction)
{
StaticTextPointer changePosition;
StaticTextPointer characterRunEndPosition;
switch (textPosition.GetPointerContext(direction))
{
case TextPointerContext.None:
changePosition = StaticTextPointer.Null;
break;
case TextPointerContext.Text:
changePosition = GetNextHighlightChangePosition(textPosition, direction);
characterRunEndPosition = textPosition.GetNextContextPosition(LogicalDirection.Forward);
if (changePosition.IsNull ||
characterRunEndPosition.CompareTo(changePosition) < 0)
{
changePosition = characterRunEndPosition;
}
break;
case TextPointerContext.EmbeddedElement:
case TextPointerContext.ElementStart:
case TextPointerContext.ElementEnd:
default:
changePosition = textPosition.CreatePointer(+1);
break;
}
return(changePosition);
}
// Token: 0x06003007 RID: 12295 RVA: 0x000D8070 File Offset: 0x000D6270
internal virtual StaticTextPointer GetNextPropertyChangePosition(StaticTextPointer textPosition, LogicalDirection direction)
{
StaticTextPointer staticTextPointer;
switch (textPosition.GetPointerContext(direction))
{
case TextPointerContext.None:
return(StaticTextPointer.Null);
case TextPointerContext.Text:
{
staticTextPointer = this.GetNextHighlightChangePosition(textPosition, direction);
StaticTextPointer nextContextPosition = textPosition.GetNextContextPosition(LogicalDirection.Forward);
if (staticTextPointer.IsNull || nextContextPosition.CompareTo(staticTextPointer) < 0)
{
return(nextContextPosition);
}
return(staticTextPointer);
}
}
staticTextPointer = textPosition.CreatePointer(1);
return(staticTextPointer);
}
/// <summary>
/// Returns the closest neighboring TextPointer in an indicated
/// direction where a property value calculated from an embedded
/// object, scoping text element, or scoping highlight could
/// change.
/// </summary>
/// <param name="textPosition">
/// Position to query.
/// </param>
/// <param name="direction">
/// Direction of content to query.
/// </param>
/// <returns>
/// If the following symbol is TextPointerContext.EmbeddedElement,
/// TextPointerContext.ElementBegin, or TextPointerContext.ElementEnd, returns
/// a TextPointer exactly one symbol distant.
///
/// If the following symbol is TextPointerContext.Text, the distance
/// of the returned TextPointer is the minimum of the value returned
/// by textPosition.GetTextLength and the distance to any highlight
/// start or end edge.
///
/// If the following symbol is TextPointerContext.None, returns null.
/// </returns>
internal virtual StaticTextPointer GetNextPropertyChangePosition(StaticTextPointer textPosition, LogicalDirection direction)
{
StaticTextPointer changePosition;
StaticTextPointer characterRunEndPosition;
switch (textPosition.GetPointerContext(direction))
{
case TextPointerContext.None:
changePosition = StaticTextPointer.Null;
break;
case TextPointerContext.Text:
changePosition = GetNextHighlightChangePosition(textPosition, direction);
characterRunEndPosition = textPosition.GetNextContextPosition(LogicalDirection.Forward);
if (changePosition.IsNull ||
characterRunEndPosition.CompareTo(changePosition) < 0)
{
changePosition = characterRunEndPosition;
}
break;
case TextPointerContext.EmbeddedElement:
case TextPointerContext.ElementStart:
case TextPointerContext.ElementEnd:
default:
changePosition = textPosition.CreatePointer(+1);
break;
}
return changePosition;
}