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using System;
using Microsoft.VisualStudio.Package;
using Irony.Parsing;
namespace Demo
{
public class LineScanner : IScanner
{
private Parser parser;
public LineScanner(Grammar grammar)
{
this.parser = new Parser(grammar);
this.parser.Context.Mode = ParseMode.VsLineScan;
}
public bool ScanTokenAndProvideInfoAboutIt(TokenInfo tokenInfo, ref int state)
{
// Reads each token in a source line and performs syntax coloring. It will continue to
// be called for the source until false is returned.
Token token = parser.Scanner.VsReadToken(ref state);
// !EOL and !EOF
if (token != null && token.Terminal != Grammar.CurrentGrammar.Eof && token.Category != TokenCategory.Error)
{
tokenInfo.StartIndex = token.Location.Position;
tokenInfo.EndIndex = tokenInfo.StartIndex + token.Length - 1;
if (token.EditorInfo != null) {
tokenInfo.Color = (Microsoft.VisualStudio.Package.TokenColor)token.EditorInfo.Color;
tokenInfo.Type = (Microsoft.VisualStudio.Package.TokenType)token.EditorInfo.Type;
}
if (token.KeyTerm != null && token.KeyTerm.EditorInfo != null)
{
tokenInfo.Trigger =
(Microsoft.VisualStudio.Package.TokenTriggers)token.KeyTerm.EditorInfo.Triggers;
}
else
{
if (token.EditorInfo != null) {
tokenInfo.Trigger =
(Microsoft.VisualStudio.Package.TokenTriggers)token.EditorInfo.Triggers;
}
}
return true;
}
return false;
}
public void SetSource(string source, int offset)
{
// Stores line of source to be used by ScanTokenAndProvideInfoAboutIt.
parser.Scanner.VsSetSource(source, offset);
}
}
}
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