void ReParse( )
{
m_regionStack.Clear();
ITextSnapshot newSnapshot = buffer.CurrentSnapshot;
List <Region> newRegions = new List <Region>();
//keep the current (deepest) partial region, which will have
// references to any parent partial regions.
PartialRegion currentRegion = null;
foreach (var line in newSnapshot.Lines)
{
int regionStart = -1;
int signStart = -1;
string text = line.GetText();
signStart = SimpleNasmLineParser.SkipSpace(text, 0);
int currentLevel = (currentRegion != null) ? currentRegion.Level : 0;
Region rgn = null;
// %if, open a new region
if ((regionStart = text.IndexOf(ConditionKeywords[0], StringComparison.InvariantCultureIgnoreCase)) != -1 &&
regionStart == signStart)
{
m_regionStack.Push(new Region()
{
StartLine = line.LineNumber,
StartOffset = line.Length
});
}
// %endif, close current region
else if ((regionStart = text.IndexOf(ConditionKeywords[3], StringComparison.InvariantCultureIgnoreCase)) != -1 &&
regionStart == signStart)
{
if (m_regionStack.Count == 0)
{
continue;
}
rgn = m_regionStack.Pop();
rgn.EndLine = line.LineNumber;
newRegions.Add(rgn);
}
// %elif. %else, close current region and open a new region
else if (((regionStart = text.IndexOf(ConditionKeywords[1], StringComparison.InvariantCultureIgnoreCase)) != -1 ||
(regionStart = text.IndexOf(ConditionKeywords[2], StringComparison.InvariantCultureIgnoreCase)) != -1) && regionStart == signStart)
{
if (m_regionStack.Count == 0)
{
continue;
}
rgn = m_regionStack.Pop();
rgn.EndLine = line.LineNumber - 1;
newRegions.Add(rgn);
m_regionStack.Push(new Region()
{
StartLine = line.LineNumber,
StartOffset = line.Length
});
}
}
newRegions = newRegions.Where(r => r.EndLine > -1).OrderBy(r => r.StartLine).ToList();
//determine the changed span, and send a changed event with the new spans
List <Span> oldSpans =
new List <Span>(this.regions.Select(r => AsSnapshotSpan(r, this.snapshot)
.TranslateTo(newSnapshot, SpanTrackingMode.EdgeExclusive)
.Span));
List <Span> newSpans =
new List <Span>(newRegions.Select(r => AsSnapshotSpan(r, newSnapshot).Span));
NormalizedSpanCollection oldSpanCollection = new NormalizedSpanCollection(oldSpans);
NormalizedSpanCollection newSpanCollection = new NormalizedSpanCollection(newSpans);
//the changed regions are regions that appear in one set or the other, but not both.
NormalizedSpanCollection removed =
NormalizedSpanCollection.Difference(oldSpanCollection, newSpanCollection);
int changeStart = int.MaxValue;
int changeEnd = -1;
if (removed.Count > 0)
{
changeStart = removed[0].Start;
changeEnd = removed[removed.Count - 1].End;
}
if (newSpans.Count > 0)
{
changeStart = Math.Min(changeStart, newSpans[0].Start);
changeEnd = Math.Max(changeEnd, newSpans[newSpans.Count - 1].End);
}
this.snapshot = newSnapshot;
this.regions = newRegions;
if (changeStart <= changeEnd)
{
ITextSnapshot snap = this.snapshot;
if (this.TagsChanged != null)
{
this.TagsChanged(this, new SnapshotSpanEventArgs(
new SnapshotSpan(this.snapshot, Span.FromBounds(changeStart, changeEnd))));
}
}
}
void ReParse( )
{
ITextSnapshot newSnapshot = buffer.CurrentSnapshot;
List <Region> newRegions = new List <Region>();
//keep the current (deepest) partial region, which will have
// references to any parent partial regions.
PartialRegion currentRegion = null;
foreach (var line in newSnapshot.Lines)
{
int regionStart = -1;
string text = line.GetText();
//lines that contain a "[" denote the start of a new region.
if ((regionStart = text.IndexOf(startHide, StringComparison.Ordinal)) != -1)
{
int currentLevel = (currentRegion != null) ? currentRegion.Level : 1;
int newLevel;
if (!TryGetLevel(text, regionStart, out newLevel))
{
newLevel = currentLevel + 1;
}
//levels are the same and we have an existing region;
//end the current region and start the next
if (currentLevel == newLevel && currentRegion != null)
{
newRegions.Add(new Region()
{
Level = currentRegion.Level,
StartLine = currentRegion.StartLine,
StartOffset = currentRegion.StartOffset,
EndLine = line.LineNumber
});
currentRegion = new PartialRegion()
{
Level = newLevel,
StartLine = line.LineNumber,
StartOffset = line.Length,
PartialParent = currentRegion.PartialParent
};
}
//this is a new (sub)region
else
{
currentRegion = new PartialRegion()
{
Level = newLevel,
StartLine = line.LineNumber,
StartOffset = line.Length,
PartialParent = currentRegion
};
}
}
//lines that contain "]" denote the end of a region
else if ((regionStart = text.IndexOf(endHide, StringComparison.Ordinal)) != -1)
{
int currentLevel = (currentRegion != null) ? currentRegion.Level : 1;
int closingLevel;
if (!TryGetLevel(text, regionStart, out closingLevel))
{
closingLevel = currentLevel;
}
//the regions match
if (currentRegion != null &&
currentLevel == closingLevel)
{
newRegions.Add(new Region()
{
Level = currentLevel,
StartLine = currentRegion.StartLine,
StartOffset = currentRegion.StartOffset,
EndLine = line.LineNumber
});
currentRegion = currentRegion.PartialParent;
}
}
}
//determine the changed span, and send a changed event with the new spans
List <Span> oldSpans =
new List <Span>(this.regions.Select(r => AsSnapshotSpan(r, this.snapshot)
.TranslateTo(newSnapshot, SpanTrackingMode.EdgeExclusive)
.Span));
List <Span> newSpans =
new List <Span>(newRegions.Select(r => AsSnapshotSpan(r, newSnapshot).Span));
NormalizedSpanCollection oldSpanCollection = new NormalizedSpanCollection(oldSpans);
NormalizedSpanCollection newSpanCollection = new NormalizedSpanCollection(newSpans);
//the changed regions are regions that appear in one set or the other, but not both.
NormalizedSpanCollection removed =
NormalizedSpanCollection.Difference(oldSpanCollection, newSpanCollection);
int changeStart = int.MaxValue;
int changeEnd = -1;
if (removed.Count > 0)
{
changeStart = removed[0].Start;
changeEnd = removed[removed.Count - 1].End;
}
if (newSpans.Count > 0)
{
changeStart = Math.Min(changeStart, newSpans[0].Start);
changeEnd = Math.Max(changeEnd, newSpans[newSpans.Count - 1].End);
}
this.snapshot = newSnapshot;
this.regions = newRegions;
if (changeStart <= changeEnd)
{
ITextSnapshot snap = this.snapshot;
if (this.TagsChanged != null)
{
this.TagsChanged(this, new SnapshotSpanEventArgs(
new SnapshotSpan(this.snapshot, Span.FromBounds(changeStart, changeEnd))));
}
}
}