private void UpdateLineCache( UserLine line )
{
line.CachedLines = new List<CachedLine>();
line.CachedWrapAt = CharsPerLine;
int len = 0;
CachedLine cachedLine = null;
foreach( var origSpan in line.Spans )
{
if( cachedLine == null )
{
cachedLine = new CachedLine( line );
line.CachedLines.Add( cachedLine );
}
if( (origSpan.Text.Length + len) < CharsPerLine )
{
cachedLine.Spans.Add( origSpan );
len += origSpan.Text.Length;
}
else
{
string spanText = origSpan.Text;
while( spanText.Length > 0 )
{
string substring = spanText.Substring( 0, Math.Min( CharsPerLine - len, spanText.Length ) );
spanText = spanText.Substring( Math.Min( CharsPerLine - len, spanText.Length ) );
len = 0;
var cachedSpan = new Span( substring, origSpan.ForegroundColour, origSpan.BackgroundColour );
cachedLine.Spans.Add( cachedSpan );
if( spanText.Length > 0 )
{
cachedLine = new CachedLine( line );
line.CachedLines.Add( cachedLine );
cachedLine.Spans.Add( line.IsOutput ? PromptOutputWrap : PromptWrap );
len += line.IsOutput ? PromptOutputWrap.Text.Length : PromptWrap.Text.Length;
}
}
}
}
}
HighlightedLine DoHighlightLine(int lineNumber, IDocumentLine documentLine, CachedLine cachedLine, ITextSourceVersion newVersion)
{
if (parseInfo == null) {
if (forceParseOnNextRefresh) {
forceParseOnNextRefresh = false;
parseInfo = SD.ParserService.Parse(FileName.Create(document.FileName), document) as CSharpFullParseInformation;
} else {
parseInfo = SD.ParserService.GetCachedParseInformation(FileName.Create(document.FileName), newVersion) as CSharpFullParseInformation;
}
}
if (parseInfo == null) {
if (invalidLines != null && !invalidLines.Contains(documentLine)) {
invalidLines.Add(documentLine);
//Debug.WriteLine("Semantic highlighting for line {0} - marking as invalid", lineNumber);
}
if (cachedLine != null) {
// If there's a cached version, adjust it to the latest document changes and return it.
// This avoids flickering when changing a line that contains semantic highlighting.
cachedLine.Update(newVersion);
#if DEBUG
cachedLine.HighlightedLine.ValidateInvariants();
#endif
return cachedLine.HighlightedLine;
} else {
return null;
}
}
if (visitor.Resolver == null) {
var compilation = SD.ParserService.GetCompilationForFile(parseInfo.FileName);
visitor.Resolver = parseInfo.GetResolver(compilation);
}
line = new HighlightedLine(document, documentLine);
this.lineNumber = lineNumber;
visitor.UpdateLineInformation(lineNumber);
if (Debugger.IsAttached) {
parseInfo.SyntaxTree.AcceptVisitor(visitor);
#if DEBUG
line.ValidateInvariants();
#endif
} else {
try {
parseInfo.SyntaxTree.AcceptVisitor(visitor);
#if DEBUG
line.ValidateInvariants();
#endif
} catch (Exception ex) {
hasCrashed = true;
throw new ApplicationException("Error highlighting line " + lineNumber, ex);
}
}
//Debug.WriteLine("Semantic highlighting for line {0} - added {1} sections", lineNumber, line.Sections.Count);
if (cachedLines != null && document.Version != null) {
cachedLines.Add(new CachedLine(line, document.Version));
}
return line;
}
