public override int Style(CodeEditor editor, int pos, int endPos)
{
ILexer lex = null;
// Find a lexer that can continue lexing.
// Use the previous state to select the right lexer.
// As long as no lexer can be found, move the start position backward.
while (pos >= 0 && lex == null)
lex = FindLexerForStyle(editor.GetStyleAt(pos--));
// start lexing from the newly determined start position
return (lex ?? lexer.First()).Style(editor, pos + 1, endPos);
}
/// <summary>
/// Find last position in the text that has the specified style.
/// </summary>
/// <param name="editor"></param>
/// <param name="style"></param>
/// <param name="from"></param>
/// <returns></returns>
protected int FindLastStyleOf(CodeEditor editor, int style, int from)
{
while (from > 0 && editor.GetStyleAt(from) != style)
from--;
return editor.GetStyleAt(from) == style ? from : -1;
}
private int ProcessBraceState(CodeEditor editor, Region c)
{
// is a closing brace
if (c[-1] == '}')
{
int i, count, style;
// find matching brace position
for (i = c.Pos - 1, count = 0; i >= 0; i--)
{
switch (editor.GetCharAt(i))
{
case '{': count--; break;
case '}': count++; break;
}
if (count == 0) break;
}
// if no matching brace found, exit
if (count != 0 || i < 0)
return -1;
// go to first non base state before the matching brace position
for (style = editor.GetStyleAt(--i);
i >= 0 && firstBaseStyle <= style && style <= lastBaseStyle;
style = editor.GetStyleAt(--i))
{
var C = editor.GetCharAt(i);
if (C == '{' || C == '}')
break;
}
// if no function lexer state found, exit
if ((i < 0 || style < firstStyle || lastStyle < style) && style != BraceStyle)
return -1;
}
return ProcessDefaultState(editor, c);
}