// Token: 0x06006FB2 RID: 28594 RVA: 0x00201C3C File Offset: 0x001FFE3C
internal override bool Validate(ITextPointer position)
{
FlowDocumentView flowDocumentView = this._owner as FlowDocumentView;
bool result;
if (flowDocumentView == null || flowDocumentView.Document == null)
{
result = base.Validate(position);
}
else
{
if (this.Validate())
{
BackgroundFormatInfo backgroundFormatInfo = flowDocumentView.Document.StructuralCache.BackgroundFormatInfo;
FlowDocumentFormatter bottomlessFormatter = flowDocumentView.Document.BottomlessFormatter;
int num = -1;
while (this.IsValid && !this.Contains(position))
{
backgroundFormatInfo.BackgroundFormat(bottomlessFormatter, true);
this._owner.UpdateLayout();
if (backgroundFormatInfo.CPInterrupted <= num)
{
break;
}
num = backgroundFormatInfo.CPInterrupted;
}
}
result = (this.IsValid && this.Contains(position));
}
return(result);
}
/// <summary>
/// <see cref="ITextView.Validate(ITextPointer)"/>
/// </summary>
internal override bool Validate(ITextPointer position)
{
FlowDocumentView owner = _owner as FlowDocumentView;
bool isValid;
if (owner == null || owner.Document == null)
{
isValid = base.Validate(position);
}
else
{
if (Validate())
{
BackgroundFormatInfo backgroundFormatInfo = owner.Document.StructuralCache.BackgroundFormatInfo;
FlowDocumentFormatter formatter = owner.Document.BottomlessFormatter;
int lastCPInterrupted = -1;
while (this.IsValid && !Contains(position))
{
backgroundFormatInfo.BackgroundFormat(formatter, true /* ignoreThrottle */);
_owner.UpdateLayout(); // May invalidate the view.
// Break if background layout is not progressing.
// There are some edge cases where Validate() == true, but background
// layout will not progress (such as collapsed text in a tree view).
if (backgroundFormatInfo.CPInterrupted <= lastCPInterrupted)
{
// CPInterrupted is reset to -1 when background layout finishes, so
// check explicitly below to see if the position is valid or not.
break;
}
lastCPInterrupted = backgroundFormatInfo.CPInterrupted;
}
}
isValid = this.IsValid && Contains(position);
}
return(isValid);
}
