--- /dev/null
+(function() {
+ var ie_lt8 = /MSIE \d/.test(navigator.userAgent) &&
+ (document.documentMode == null || document.documentMode < 8);
+
+ var Pos = CodeMirror.Pos;
+
+ var matching = {"(": ")>", ")": "(<", "[": "]>", "]": "[<", "{": "}>", "}": "{<"};
+ function findMatchingBracket(cm, where, strict) {
+ var state = cm.state.matchBrackets;
+ var maxScanLen = (state && state.maxScanLineLength) || 10000;
+
+ var cur = where || cm.getCursor(), line = cm.getLineHandle(cur.line), pos = cur.ch - 1;
+ var match = (pos >= 0 && matching[line.text.charAt(pos)]) || matching[line.text.charAt(++pos)];
+ if (!match) return null;
+ var forward = match.charAt(1) == ">", d = forward ? 1 : -1;
+ if (strict && forward != (pos == cur.ch)) return null;
+ var style = cm.getTokenTypeAt(Pos(cur.line, pos + 1));
+
+ var stack = [line.text.charAt(pos)], re = /[(){}[\]]/;
+ function scan(line, lineNo, start) {
+ if (!line.text) return;
+ var pos = forward ? 0 : line.text.length - 1, end = forward ? line.text.length : -1;
+ if (line.text.length > maxScanLen) return null;
+ if (start != null) pos = start + d;
+ for (; pos != end; pos += d) {
+ var ch = line.text.charAt(pos);
+ if (re.test(ch) && cm.getTokenTypeAt(Pos(lineNo, pos + 1)) == style) {
+ var match = matching[ch];
+ if (match.charAt(1) == ">" == forward) stack.push(ch);
+ else if (stack.pop() != match.charAt(0)) return {pos: pos, match: false};
+ else if (!stack.length) return {pos: pos, match: true};
+ }
+ }
+ }
+ for (var i = cur.line, found, e = forward ? Math.min(i + 100, cm.lineCount()) : Math.max(-1, i - 100); i != e; i+=d) {
+ if (i == cur.line) found = scan(line, i, pos);
+ else found = scan(cm.getLineHandle(i), i);
+ if (found) break;
+ }
+ return {from: Pos(cur.line, pos), to: found && Pos(i, found.pos),
+ match: found && found.match, forward: forward};
+ }
+
+ function matchBrackets(cm, autoclear) {
+ // Disable brace matching in long lines, since it'll cause hugely slow updates
+ var maxHighlightLen = cm.state.matchBrackets.maxHighlightLineLength || 1000;
+ var found = findMatchingBracket(cm);
+ if (!found || cm.getLine(found.from.line).length > maxHighlightLen ||
+ found.to && cm.getLine(found.to.line).length > maxHighlightLen)
+ return;
+
+ var style = found.match ? "CodeMirror-matchingbracket" : "CodeMirror-nonmatchingbracket";
+ var one = cm.markText(found.from, Pos(found.from.line, found.from.ch + 1), {className: style});
+ var two = found.to && cm.markText(found.to, Pos(found.to.line, found.to.ch + 1), {className: style});
+ // Kludge to work around the IE bug from issue #1193, where text
+ // input stops going to the textare whever this fires.
+ if (ie_lt8 && cm.state.focused) cm.display.input.focus();
+ var clear = function() {
+ cm.operation(function() { one.clear(); two && two.clear(); });
+ };
+ if (autoclear) setTimeout(clear, 800);
+ else return clear;
+ }
+
+ var currentlyHighlighted = null;
+ function doMatchBrackets(cm) {
+ cm.operation(function() {
+ if (currentlyHighlighted) {currentlyHighlighted(); currentlyHighlighted = null;}
+ if (!cm.somethingSelected()) currentlyHighlighted = matchBrackets(cm, false);
+ });
+ }
+
+ CodeMirror.defineOption("matchBrackets", false, function(cm, val, old) {
+ if (old && old != CodeMirror.Init)
+ cm.off("cursorActivity", doMatchBrackets);
+ if (val) {
+ cm.state.matchBrackets = typeof val == "object" ? val : {};
+ cm.on("cursorActivity", doMatchBrackets);
+ }
+ });
+
+ CodeMirror.defineExtension("matchBrackets", function() {matchBrackets(this, true);});
+ CodeMirror.defineExtension("findMatchingBracket", function(pos, strict){
+ return findMatchingBracket(this, pos, strict);
+ });
+})();