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