/// <summary>
/// <see cref="System.Windows.Documents.TextRange.EndChange"/>
/// </summary>
internal static void EndChange(ITextRange thisRange, bool disableScroll, bool skipEvents)
{
ChangeBlockUndoRecord changeBlockUndoRecord;
bool isChanged;
ITextContainer textContainer;
Invariant.Assert(thisRange._ChangeBlockLevel > 0, "Unmatched EndChange call!");
textContainer = thisRange.Start.TextContainer;
try
{
//
// Complete the content changed block.
//
try
{
// Raise first public event -- TextContainer.EndChange.
textContainer.EndChange(skipEvents);
}
finally
{
// Always drop the ChangeBlockLevel, no matter what happens.
// This ensures that we won't ignore future events if the
// application recovers from an exception.
thisRange._ChangeBlockLevel--;
// Clear out thisRange.IsChanged now so that it isn't
// left dangling if TextContainer.EndChange throws
// an exception.
isChanged = thisRange._IsChanged;
if (thisRange._ChangeBlockLevel == 0)
{
thisRange._IsChanged = false;
}
}
//
// Complete the range repositioned block.
//
if (thisRange._ChangeBlockLevel == 0 && isChanged)
{
// Raise the second public event -- TextRange.Changed.
thisRange.NotifyChanged(disableScroll, skipEvents);
}
}
finally
{
// Make sure we close the undo record no matter what happened.
changeBlockUndoRecord = (ChangeBlockUndoRecord)thisRange._ChangeBlockUndoRecord;
if (changeBlockUndoRecord != null && thisRange._ChangeBlockLevel == 0)
{
try
{
changeBlockUndoRecord.OnEndChange();
}
finally
{
thisRange._ChangeBlockUndoRecord = null;
}
}
}
}
