browser/devtools/sourceeditor/codemirror/matchbrackets.js@6474c204b198
browser/devtools/sourceeditor/codemirror/matchbrackets.js
Wed, 31 Dec 2014 06:09:35 +0100
- author
- Michael Schloh von Bennewitz <michael@schloh.com>
- date
- Wed, 31 Dec 2014 06:09:35 +0100
- changeset 0
- 6474c204b198
- permissions
- -rw-r--r--
Cloned upstream origin tor-browser at tor-browser-31.3.0esr-4.5-1-build1
revision ID fc1c9ff7c1b2defdbc039f12214767608f46423f for hacking purpose.
1 (function(mod) {
2 if (typeof exports == "object" && typeof module == "object") // CommonJS
3 mod(require("../../lib/codemirror"));
4 else if (typeof define == "function" && define.amd) // AMD
5 define(["../../lib/codemirror"], mod);
6 else // Plain browser env
7 mod(CodeMirror);
8 })(function(CodeMirror) {
9 var ie_lt8 = /MSIE \d/.test(navigator.userAgent) &&
10 (document.documentMode == null || document.documentMode < 8);
12 var Pos = CodeMirror.Pos;
14 var matching = {"(": ")>", ")": "(<", "[": "]>", "]": "[<", "{": "}>", "}": "{<"};
16 function findMatchingBracket(cm, where, strict, config) {
17 var line = cm.getLineHandle(where.line), pos = where.ch - 1;
18 var match = (pos >= 0 && matching[line.text.charAt(pos)]) || matching[line.text.charAt(++pos)];
19 if (!match) return null;
20 var dir = match.charAt(1) == ">" ? 1 : -1;
21 if (strict && (dir > 0) != (pos == where.ch)) return null;
22 var style = cm.getTokenTypeAt(Pos(where.line, pos + 1));
24 var found = scanForBracket(cm, Pos(where.line, pos + (dir > 0 ? 1 : 0)), dir, style || null, config);
25 return {from: Pos(where.line, pos), to: found && found.pos,
26 match: found && found.ch == match.charAt(0), forward: dir > 0};
27 }
29 function scanForBracket(cm, where, dir, style, config) {
30 var maxScanLen = (config && config.maxScanLineLength) || 10000;
31 var maxScanLines = (config && config.maxScanLines) || 500;
33 var stack = [], re = /[(){}[\]]/;
34 var lineEnd = dir > 0 ? Math.min(where.line + maxScanLines, cm.lastLine() + 1)
35 : Math.max(cm.firstLine() - 1, where.line - maxScanLines);
36 for (var lineNo = where.line; lineNo != lineEnd; lineNo += dir) {
37 var line = cm.getLine(lineNo);
38 if (!line) continue;
39 var pos = dir > 0 ? 0 : line.length - 1, end = dir > 0 ? line.length : -1;
40 if (line.length > maxScanLen) continue;
41 if (lineNo == where.line) pos = where.ch - (dir < 0 ? 1 : 0);
42 for (; pos != end; pos += dir) {
43 var ch = line.charAt(pos);
44 if (re.test(ch) && (style === undefined || cm.getTokenTypeAt(Pos(lineNo, pos + 1)) == style)) {
45 var match = matching[ch];
46 if ((match.charAt(1) == ">") == (dir > 0)) stack.push(ch);
47 else if (!stack.length) return {pos: Pos(lineNo, pos), ch: ch};
48 else stack.pop();
49 }
50 }
51 }
52 }
54 function matchBrackets(cm, autoclear, config) {
55 // Disable brace matching in long lines, since it'll cause hugely slow updates
56 var maxHighlightLen = cm.state.matchBrackets.maxHighlightLineLength || 1000;
57 var marks = [], ranges = cm.listSelections();
58 for (var i = 0; i < ranges.length; i++) {
59 var match = ranges[i].empty() && findMatchingBracket(cm, ranges[i].head, false, config);
60 if (match && cm.getLine(match.from.line).length <= maxHighlightLen &&
61 match.to && cm.getLine(match.to.line).length <= maxHighlightLen) {
62 var style = match.match ? "CodeMirror-matchingbracket" : "CodeMirror-nonmatchingbracket";
63 marks.push(cm.markText(match.from, Pos(match.from.line, match.from.ch + 1), {className: style}));
64 if (match.to)
65 marks.push(cm.markText(match.to, Pos(match.to.line, match.to.ch + 1), {className: style}));
66 }
67 }
69 if (marks.length) {
70 // Kludge to work around the IE bug from issue #1193, where text
71 // input stops going to the textare whever this fires.
72 if (ie_lt8 && cm.state.focused) cm.display.input.focus();
74 var clear = function() {
75 cm.operation(function() {
76 for (var i = 0; i < marks.length; i++) marks[i].clear();
77 });
78 };
79 if (autoclear) setTimeout(clear, 800);
80 else return clear;
81 }
82 }
84 var currentlyHighlighted = null;
85 function doMatchBrackets(cm) {
86 cm.operation(function() {
87 if (currentlyHighlighted) {currentlyHighlighted(); currentlyHighlighted = null;}
88 currentlyHighlighted = matchBrackets(cm, false, cm.state.matchBrackets);
89 });
90 }
92 CodeMirror.defineOption("matchBrackets", false, function(cm, val, old) {
93 if (old && old != CodeMirror.Init)
94 cm.off("cursorActivity", doMatchBrackets);
95 if (val) {
96 cm.state.matchBrackets = typeof val == "object" ? val : {};
97 cm.on("cursorActivity", doMatchBrackets);
98 }
99 });
101 CodeMirror.defineExtension("matchBrackets", function() {matchBrackets(this, true);});
102 CodeMirror.defineExtension("findMatchingBracket", function(pos, strict){
103 return findMatchingBracket(this, pos, strict);
104 });
105 CodeMirror.defineExtension("scanForBracket", function(pos, dir, style){
106 return scanForBracket(this, pos, dir, style);
107 });
108 });
