| (function() { |
| var matching = {"(": ")>", ")": "(<", "[": "]>", "]": "[<", "{": "}>", "}": "{<"}; |
| function findMatchingBracket(cm) { |
| var cur = 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; |
| var style = cm.getTokenAt({line: cur.line, ch: pos + 1}).type; |
| |
| 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 (start != null) pos = start + d; |
| for (; pos != end; pos += d) { |
| var ch = line.text.charAt(pos); |
| if (re.test(ch) && cm.getTokenAt({line: lineNo, ch: pos + 1}).type == 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: {line: cur.line, ch: pos}, to: found && {line: i, ch: found.pos}, match: found && found.match}; |
| } |
| |
| function matchBrackets(cm, autoclear) { |
| var found = findMatchingBracket(cm); |
| if (!found) return; |
| var style = found.match ? "CodeMirror-matchingbracket" : "CodeMirror-nonmatchingbracket"; |
| var one = cm.markText(found.from, {line: found.from.line, ch: found.from.ch + 1}, |
| {className: style}); |
| var two = found.to && cm.markText(found.to, {line: found.to.line, ch: found.to.ch + 1}, |
| {className: style}); |
| 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) { |
| if (val) cm.on("cursorActivity", doMatchBrackets); |
| else cm.off("cursorActivity", doMatchBrackets); |
| }); |
| |
| CodeMirror.defineExtension("matchBrackets", function() {matchBrackets(this, true);}); |
| CodeMirror.defineExtension("findMatchingBracket", function(){return findMatchingBracket(this);}); |
| })(); |