internal void Delete(ref DeferredEventList deferredEventList)
{
// we cannot fire an event here because this method is called while the LineManager adjusts the
// lineCollection, so an event handler could see inconsistent state
_lineSegment = null;
deferredEventList.AddDeletedAnchor(this);
}
/// <summary>
/// Replaces the specified offset.
/// </summary>
/// <param name="offset">The offset.</param>
/// <param name="length">The length.</param>
/// <param name="text">The text.</param>
public void Replace(int offset, int length, string text)
{
int lineStart = GetLineNumberForOffset(offset);
int oldNumberOfLines = TotalNumberOfLines;
DeferredEventList deferredEventList = new DeferredEventList();
RemoveInternal(ref deferredEventList, offset, length);
int numberOfLinesAfterRemoving = TotalNumberOfLines;
if (!string.IsNullOrEmpty(text))
{
InsertInternal(offset, text);
}
// Only fire events after RemoveInternal+InsertInternal finished completely:
// Otherwise we would expose inconsistent state to the event handlers.
RunHighlighter(lineStart, 1 + Math.Max(0, TotalNumberOfLines - numberOfLinesAfterRemoving));
if (deferredEventList.RemovedLines != null)
{
foreach (LineSegment ls in deferredEventList.RemovedLines)
{
OnLineDeleted(new LineEventArgs(_document, ls));
}
}
deferredEventList.RaiseEvents();
if (TotalNumberOfLines != oldNumberOfLines)
{
OnLineCountChanged(new LineCountChangedEventArgs(_document, lineStart, TotalNumberOfLines - oldNumberOfLines));
}
}
void RemoveInternal(ref DeferredEventList deferredEventList, int offset, int length)
{
Debug.Assert(length >= 0);
if (length == 0)
{
return;
}
LineSegmentTree.Enumerator it = _lineSegments.GetEnumeratorForOffset(offset);
LineSegment startSegment = it.Current;
int startSegmentOffset = startSegment.Offset;
if (offset + length < startSegmentOffset + startSegment.TotalLength)
{
// just removing a part of this line segment
startSegment.RemovedLinePart(ref deferredEventList, offset - startSegmentOffset, length);
SetSegmentLength(startSegment, startSegment.TotalLength - length);
return;
}
// merge startSegment with another line segment because startSegment's delimiter was deleted
// possibly remove lines in between if multiple delimiters were deleted
int charactersRemovedInStartLine = startSegmentOffset + startSegment.TotalLength - offset;
Debug.Assert(charactersRemovedInStartLine > 0);
startSegment.RemovedLinePart(ref deferredEventList, offset - startSegmentOffset, charactersRemovedInStartLine);
LineSegment endSegment = _lineSegments.GetByOffset(offset + length);
if (endSegment == startSegment)
{
// special case: we are removing a part of the last line up to the
// end of the document
SetSegmentLength(startSegment, startSegment.TotalLength - length);
return;
}
int endSegmentOffset = endSegment.Offset;
int charactersLeftInEndLine = endSegmentOffset + endSegment.TotalLength - (offset + length);
endSegment.RemovedLinePart(ref deferredEventList, 0, endSegment.TotalLength - charactersLeftInEndLine);
startSegment.MergedWith(endSegment, offset - startSegmentOffset);
SetSegmentLength(startSegment, startSegment.TotalLength - charactersRemovedInStartLine + charactersLeftInEndLine);
startSegment.DelimiterLength = endSegment.DelimiterLength;
// remove all segments between startSegment (excl.) and endSegment (incl.)
it.MoveNext();
LineSegment segmentToRemove;
do
{
segmentToRemove = it.Current;
it.MoveNext();
_lineSegments.RemoveSegment(segmentToRemove);
segmentToRemove.Deleted(ref deferredEventList);
} while (segmentToRemove != endSegment);
}
/// <summary>
/// Is called when the <see cref="LineSegment"/> is deleted.
/// </summary>
/// <param name="deferredEventList">The deferred event list.</param>
internal void Deleted(ref DeferredEventList deferredEventList)
{
//Console.WriteLine("Deleted");
_treeEntry = LineSegmentTree.Enumerator.Invalid;
if (_anchors != null)
{
foreach (TextAnchor anchor in _anchors)
{
anchor.Delete(ref deferredEventList);
}
_anchors = null;
}
}
/// <summary>
/// Is called when a part of the line is removed.
/// </summary>
internal void RemovedLinePart(ref DeferredEventList deferredEventList, int startColumn, int length)
{
if (length == 0)
{
return;
}
Debug.Assert(length > 0);
if (_anchors != null)
{
List <TextAnchor> deletedAnchors = null;
foreach (TextAnchor anchor in _anchors)
{
if (anchor.ColumnNumber > startColumn)
{
if (anchor.ColumnNumber >= startColumn + length)
{
anchor.ColumnNumber -= length;
}
else
{
if (deletedAnchors == null)
{
deletedAnchors = new List <TextAnchor>();
}
anchor.Delete(ref deferredEventList);
deletedAnchors.Add(anchor);
}
}
}
if (deletedAnchors != null)
{
foreach (TextAnchor anchor in deletedAnchors)
{
_anchors.Remove(anchor);
}
}
}
}
/// <summary>
/// Is called when a part of the line is removed.
/// </summary>
internal void RemovedLinePart(ref DeferredEventList deferredEventList, int startColumn, int length)
{
if (length == 0)
return;
Debug.Assert(length > 0);
if (_anchors != null)
{
List<TextAnchor> deletedAnchors = null;
foreach (TextAnchor anchor in _anchors)
{
if (anchor.ColumnNumber > startColumn)
{
if (anchor.ColumnNumber >= startColumn + length)
{
anchor.ColumnNumber -= length;
}
else
{
if (deletedAnchors == null)
deletedAnchors = new List<TextAnchor>();
anchor.Delete(ref deferredEventList);
deletedAnchors.Add(anchor);
}
}
}
if (deletedAnchors != null)
{
foreach (TextAnchor anchor in deletedAnchors)
{
_anchors.Remove(anchor);
}
}
}
}
/// <summary>
/// Is called when the <see cref="LineSegment"/> is deleted.
/// </summary>
/// <param name="deferredEventList">The deferred event list.</param>
internal void Deleted(ref DeferredEventList deferredEventList)
{
//Console.WriteLine("Deleted");
_treeEntry = LineSegmentTree.Enumerator.Invalid;
if (_anchors != null)
{
foreach (TextAnchor anchor in _anchors)
{
anchor.Delete(ref deferredEventList);
}
_anchors = null;
}
}
internal void Delete(ref DeferredEventList deferredEventList)
{
// we cannot fire an event here because this method is called while the LineManager adjusts the
// lineCollection, so an event handler could see inconsistent state
_lineSegment = null;
deferredEventList.AddDeletedAnchor(this);
}
void RemoveInternal(ref DeferredEventList deferredEventList, int offset, int length)
{
Debug.Assert(length >= 0);
if (length == 0) return;
LineSegmentTree.Enumerator it = _lineSegments.GetEnumeratorForOffset(offset);
LineSegment startSegment = it.Current;
int startSegmentOffset = startSegment.Offset;
if (offset + length < startSegmentOffset + startSegment.TotalLength)
{
// just removing a part of this line segment
startSegment.RemovedLinePart(ref deferredEventList, offset - startSegmentOffset, length);
SetSegmentLength(startSegment, startSegment.TotalLength - length);
return;
}
// merge startSegment with another line segment because startSegment's delimiter was deleted
// possibly remove lines in between if multiple delimiters were deleted
int charactersRemovedInStartLine = startSegmentOffset + startSegment.TotalLength - offset;
Debug.Assert(charactersRemovedInStartLine > 0);
startSegment.RemovedLinePart(ref deferredEventList, offset - startSegmentOffset, charactersRemovedInStartLine);
LineSegment endSegment = _lineSegments.GetByOffset(offset + length);
if (endSegment == startSegment)
{
// special case: we are removing a part of the last line up to the
// end of the document
SetSegmentLength(startSegment, startSegment.TotalLength - length);
return;
}
int endSegmentOffset = endSegment.Offset;
int charactersLeftInEndLine = endSegmentOffset + endSegment.TotalLength - (offset + length);
endSegment.RemovedLinePart(ref deferredEventList, 0, endSegment.TotalLength - charactersLeftInEndLine);
startSegment.MergedWith(endSegment, offset - startSegmentOffset);
SetSegmentLength(startSegment, startSegment.TotalLength - charactersRemovedInStartLine + charactersLeftInEndLine);
startSegment.DelimiterLength = endSegment.DelimiterLength;
// remove all segments between startSegment (excl.) and endSegment (incl.)
it.MoveNext();
LineSegment segmentToRemove;
do
{
segmentToRemove = it.Current;
it.MoveNext();
_lineSegments.RemoveSegment(segmentToRemove);
segmentToRemove.Deleted(ref deferredEventList);
} while (segmentToRemove != endSegment);
}
/// <summary>
/// Replaces the specified offset.
/// </summary>
/// <param name="offset">The offset.</param>
/// <param name="length">The length.</param>
/// <param name="text">The text.</param>
public void Replace(int offset, int length, string text)
{
int lineStart = GetLineNumberForOffset(offset);
int oldNumberOfLines = TotalNumberOfLines;
DeferredEventList deferredEventList = new DeferredEventList();
RemoveInternal(ref deferredEventList, offset, length);
int numberOfLinesAfterRemoving = TotalNumberOfLines;
if (!string.IsNullOrEmpty(text))
{
InsertInternal(offset, text);
}
// Only fire events after RemoveInternal+InsertInternal finished completely:
// Otherwise we would expose inconsistent state to the event handlers.
RunHighlighter(lineStart, 1 + Math.Max(0, TotalNumberOfLines - numberOfLinesAfterRemoving));
if (deferredEventList.RemovedLines != null)
{
foreach (LineSegment ls in deferredEventList.RemovedLines)
OnLineDeleted(new LineEventArgs(_document, ls));
}
deferredEventList.RaiseEvents();
if (TotalNumberOfLines != oldNumberOfLines)
{
OnLineCountChanged(new LineCountChangedEventArgs(_document, lineStart, TotalNumberOfLines - oldNumberOfLines));
}
}