]> iEval git - gruntmaster-page.git/blob - js/95-matchbrackets.js
Merge branch 'master' into mindcoding
[gruntmaster-page.git] / js / 95-matchbrackets.js
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 var maxScanLines = (state && state.maxScanLines) || 100;
12
13 var cur = where || cm.getCursor(), line = cm.getLineHandle(cur.line), pos = cur.ch - 1;
14 var match = (pos >= 0 && matching[line.text.charAt(pos)]) || matching[line.text.charAt(++pos)];
15 if (!match) return null;
16 var forward = match.charAt(1) == ">", d = forward ? 1 : -1;
17 if (strict && forward != (pos == cur.ch)) return null;
18 var style = cm.getTokenTypeAt(Pos(cur.line, pos + 1));
19
20 var stack = [line.text.charAt(pos)], re = /[(){}[\]]/;
21 function scan(line, lineNo, start) {
22 if (!line.text) return;
23 var pos = forward ? 0 : line.text.length - 1, end = forward ? line.text.length : -1;
24 if (line.text.length > maxScanLen) return null;
25 if (start != null) pos = start + d;
26 for (; pos != end; pos += d) {
27 var ch = line.text.charAt(pos);
28 if (re.test(ch) && cm.getTokenTypeAt(Pos(lineNo, pos + 1)) == style) {
29 var match = matching[ch];
30 if (match.charAt(1) == ">" == forward) stack.push(ch);
31 else if (stack.pop() != match.charAt(0)) return {pos: pos, match: false};
32 else if (!stack.length) return {pos: pos, match: true};
33 }
34 }
35 }
36 for (var i = cur.line, found, e = forward ? Math.min(i + maxScanLines, cm.lineCount()) : Math.max(-1, i - maxScanLines); i != e; i+=d) {
37 if (i == cur.line) found = scan(line, i, pos);
38 else found = scan(cm.getLineHandle(i), i);
39 if (found) break;
40 }
41 return {from: Pos(cur.line, pos), to: found && Pos(i, found.pos),
42 match: found && found.match, forward: forward};
43 }
44
45 function matchBrackets(cm, autoclear) {
46 // Disable brace matching in long lines, since it'll cause hugely slow updates
47 var maxHighlightLen = cm.state.matchBrackets.maxHighlightLineLength || 1000;
48 var found = findMatchingBracket(cm);
49 if (!found || cm.getLine(found.from.line).length > maxHighlightLen ||
50 found.to && cm.getLine(found.to.line).length > maxHighlightLen)
51 return;
52
53 var style = found.match ? "CodeMirror-matchingbracket" : "CodeMirror-nonmatchingbracket";
54 var one = cm.markText(found.from, Pos(found.from.line, found.from.ch + 1), {className: style});
55 var two = found.to && cm.markText(found.to, Pos(found.to.line, found.to.ch + 1), {className: style});
56 // Kludge to work around the IE bug from issue #1193, where text
57 // input stops going to the textarea whenever this fires.
58 if (ie_lt8 && cm.state.focused) cm.display.input.focus();
59 var clear = function() {
60 cm.operation(function() { one.clear(); two && two.clear(); });
61 };
62 if (autoclear) setTimeout(clear, 800);
63 else return clear;
64 }
65
66 var currentlyHighlighted = null;
67 function doMatchBrackets(cm) {
68 cm.operation(function() {
69 if (currentlyHighlighted) {currentlyHighlighted(); currentlyHighlighted = null;}
70 if (!cm.somethingSelected()) currentlyHighlighted = matchBrackets(cm, false);
71 });
72 }
73
74 CodeMirror.defineOption("matchBrackets", false, function(cm, val, old) {
75 if (old && old != CodeMirror.Init)
76 cm.off("cursorActivity", doMatchBrackets);
77 if (val) {
78 cm.state.matchBrackets = typeof val == "object" ? val : {};
79 cm.on("cursorActivity", doMatchBrackets);
80 }
81 });
82
83 CodeMirror.defineExtension("matchBrackets", function() {matchBrackets(this, true);});
84 CodeMirror.defineExtension("findMatchingBracket", function(pos, strict){
85 return findMatchingBracket(this, pos, strict);
86 });
87 })();
This page took 0.064584 seconds and 5 git commands to generate.