jsx
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a faster, safer, easier JavaScript
32 lines (31 loc) • 1.27 kB
JavaScript
CodeMirror.braceRangeFinder = function(cm, start) {
var line = start.line, lineText = cm.getLine(line);
var at = lineText.length, startChar, tokenType;
for (; at > 0;) {
var found = lineText.lastIndexOf("{", at);
if (found < start.ch) break;
tokenType = cm.getTokenAt(CodeMirror.Pos(line, found + 1)).type;
if (!/^(comment|string)/.test(tokenType)) { startChar = found; break; }
at = found - 1;
}
if (startChar == null || lineText.lastIndexOf("}") > startChar) return;
var count = 1, lastLine = cm.lineCount(), end, endCh;
outer: for (var i = line + 1; i < lastLine; ++i) {
var text = cm.getLine(i), pos = 0;
for (;;) {
var nextOpen = text.indexOf("{", pos), nextClose = text.indexOf("}", pos);
if (nextOpen < 0) nextOpen = text.length;
if (nextClose < 0) nextClose = text.length;
pos = Math.min(nextOpen, nextClose);
if (pos == text.length) break;
if (cm.getTokenAt(CodeMirror.Pos(i, pos + 1)).type == tokenType) {
if (pos == nextOpen) ++count;
else if (!--count) { end = i; endCh = pos; break outer; }
}
++pos;
}
}
if (end == null || end == line + 1) return;
return {from: CodeMirror.Pos(line, startChar + 1),
to: CodeMirror.Pos(end, endCh)};
};