public ElisionMap IncorporateChanges(INormalizedTextChangeCollection sourceChanges,
FrugalList <TextChange> projectedChanges,
ITextSnapshot beforeSourceSnapshot,
ITextSnapshot sourceSnapshot,
ITextSnapshot beforeElisionSnapshot)
{
ElisionMapNode newRoot = this.root;
int accumulatedProjectedDelta = 0;
foreach (ITextChange sourceChange in sourceChanges)
{
int accumulatedDelete = 0;
int incrementalAccumulatedProjectedDelta = 0;
StringRebuilder newText = TextChange.NewStringRebuilder(sourceChange);
newRoot = newRoot.IncorporateChange(beforeSourceSnapshot: beforeSourceSnapshot,
afterSourceSnapshot: sourceSnapshot,
beforeElisionSnapshot: beforeElisionSnapshot,
sourceInsertionPosition: sourceChange.NewLength > 0 ? sourceChange.NewPosition : (int?)null,
newText: newText,
sourceDeletionSpan: new Span(sourceChange.NewPosition, sourceChange.OldLength),
absoluteSourceOldPosition: sourceChange.OldPosition,
absoluteSourceNewPosition: sourceChange.NewPosition,
projectedPrefixSize: 0,
projectedChanges: projectedChanges,
incomingAccumulatedDelta: accumulatedProjectedDelta,
outgoingAccumulatedDelta: ref incrementalAccumulatedProjectedDelta,
accumulatedDelete: ref accumulatedDelete);
accumulatedProjectedDelta += incrementalAccumulatedProjectedDelta;
}
if (newRoot.TotalSourceSize != sourceSnapshot.Length)
{
Debug.Fail(String.Format(System.Globalization.CultureInfo.InvariantCulture,
"Change incorporation length inconsistency. Elision:{0} Source:{1}", newRoot.TotalSourceSize, sourceSnapshot.Length));
throw new InvalidOperationException(Strings.InvalidLengthCalculation);
}
if (newRoot.TotalSourceLineBreakCount + 1 != sourceSnapshot.LineCount)
{
Debug.Fail(String.Format(System.Globalization.CultureInfo.InvariantCulture,
"Change incorporation line count inconsistency. Elision:{0} Source:{1}", newRoot.TotalSourceLineBreakCount + 1, sourceSnapshot.LineCount));
throw new InvalidOperationException(Strings.InvalidLineCountCalculation);
}
return(new ElisionMap(newRoot, this.spanCount));
}