1(function() { 2 var ie_lt8 = /MSIE \d/.test(navigator.userAgent) && 3 (document.documentMode == null || document.documentMode < 8); 4 5 var Pos = CodeMirror.Pos; 6 7 var matching = {"(": ")>", ")": "(<", "[": "]>", "]": "[<", "{": "}>", "}": "{<"}; 8 function findMatchingBracket(cm, where, strict) { 9 var state = cm.state.matchBrackets; 10 var maxScanLen = (state && state.maxScanLineLength) || 10000; 11 12 var cur = where || cm.getCursor(), line = cm.getLineHandle(cur.line), pos = cur.ch - 1; 13 var match = (pos >= 0 && matching[line.text.charAt(pos)]) || matching[line.text.charAt(++pos)]; 14 if (!match) return null; 15 var forward = match.charAt(1) == ">", d = forward ? 1 : -1; 16 if (strict && forward != (pos == cur.ch)) return null; 17 var style = cm.getTokenTypeAt(Pos(cur.line, pos + 1)); 18 19 var stack = [line.text.charAt(pos)], re = /[(){}[\]]/; 20 function scan(line, lineNo, start) { 21 if (!line.text) return; 22 var pos = forward ? 0 : line.text.length - 1, end = forward ? line.text.length : -1; 23 if (line.text.length > maxScanLen) return null; 24 if (start != null) pos = start + d; 25 for (; pos != end; pos += d) { 26 var ch = line.text.charAt(pos); 27 if (re.test(ch) && cm.getTokenTypeAt(Pos(lineNo, pos + 1)) == style) { 28 var match = matching[ch]; 29 if (match.charAt(1) == ">" == forward) stack.push(ch); 30 else if (stack.pop() != match.charAt(0)) return {pos: pos, match: false}; 31 else if (!stack.length) return {pos: pos, match: true}; 32 } 33 } 34 } 35 for (var i = cur.line, found, e = forward ? Math.min(i + 100, cm.lineCount()) : Math.max(-1, i - 100); i != e; i+=d) { 36 if (i == cur.line) found = scan(line, i, pos); 37 else found = scan(cm.getLineHandle(i), i); 38 if (found) break; 39 } 40 return {from: Pos(cur.line, pos), to: found && Pos(i, found.pos), 41 match: found && found.match, forward: forward}; 42 } 43 44 function matchBrackets(cm, autoclear) { 45 // Disable brace matching in long lines, since it'll cause hugely slow updates 46 var maxHighlightLen = cm.state.matchBrackets.maxHighlightLineLength || 1000; 47 var found = findMatchingBracket(cm); 48 if (!found || cm.getLine(found.from.line).length > maxHighlightLen || 49 found.to && cm.getLine(found.to.line).length > maxHighlightLen) 50 return; 51 52 var style = found.match ? "CodeMirror-matchingbracket" : "CodeMirror-nonmatchingbracket"; 53 var one = cm.markText(found.from, Pos(found.from.line, found.from.ch + 1), {className: style}); 54 var two = found.to && cm.markText(found.to, Pos(found.to.line, found.to.ch + 1), {className: style}); 55 // Kludge to work around the IE bug from issue #1193, where text 56 // input stops going to the textare whever this fires. 57 if (ie_lt8 && cm.state.focused) cm.display.input.focus(); 58 var clear = function() { 59 cm.operation(function() { one.clear(); two && two.clear(); }); 60 }; 61 if (autoclear) setTimeout(clear, 800); 62 else return clear; 63 } 64 65 var currentlyHighlighted = null; 66 function doMatchBrackets(cm) { 67 cm.operation(function() { 68 if (currentlyHighlighted) {currentlyHighlighted(); currentlyHighlighted = null;} 69 if (!cm.somethingSelected()) currentlyHighlighted = matchBrackets(cm, false); 70 }); 71 } 72 73 CodeMirror.defineOption("matchBrackets", false, function(cm, val, old) { 74 if (old && old != CodeMirror.Init) 75 cm.off("cursorActivity", doMatchBrackets); 76 if (val) { 77 cm.state.matchBrackets = typeof val == "object" ? val : {}; 78 cm.on("cursorActivity", doMatchBrackets); 79 } 80 }); 81 82 CodeMirror.defineExtension("matchBrackets", function() {matchBrackets(this, true);}); 83 CodeMirror.defineExtension("findMatchingBracket", function(pos, strict){ 84 return findMatchingBracket(this, pos, strict); 85 }); 86})(); 87