/// <summary>
/// tries to close region
/// </summary>
/// <param name="parser">parser</param>
/// <returns>whether region was closed</returns>
public bool TryComplete(SnapshotParser parser)
{
SnapshotPoint point = parser.CurrentPoint;
//ClassificationSpan span = parser.CurrentSpan;
//if (span == null)
{
char c = point.GetChar();
if (RegionType == TextRegionType.Block && c == '}')
{
EndPoint = point + 1;
}
}
return Complete;
}
/// <summary>
/// parses buffer
/// </summary>
/// <param name="parser"></param>
/// <param name="parent">parent region or null</param>
/// <returns>a region with its children or null</returns>
public static TextRegion ParseBuffer(SnapshotParser parser, TextRegion parent)
{
for (; !parser.AtEnd(); parser.MoveNext())
{
TextRegion r = TextRegion.TryCreateRegion(parser);
if (r != null)
{
parser.MoveNext();
//found the start of the region
if (!r.Complete)
{
//searching for child regions
while (TextRegion.ParseBuffer(parser, r) != null) ;
//found everything
r.ExtendStartPoint();
}
//adding to children or merging with last child
r.Parent = parent;
parent.Children.Add(r);
return r;
}
//found parent's end - terminating parsing
if (parent.TryComplete(parser))
{
parser.MoveNext();
return null;
}
}
return null;
}
/// <summary>
/// parses input buffer, searches for region start
/// </summary>
/// <param name="parser"></param>
/// <returns>created region or null</returns>
public static TextRegion TryCreateRegion(SnapshotParser parser)
{
SnapshotPoint point = parser.CurrentPoint;
//ClassificationSpan span = parser.CurrentSpan;
//if (span == null)
{
char c = point.GetChar();
switch (c)
{
case '{':
return new TextRegion(point, TextRegionType.Block);
}
}
return null;
}
