The Tor Browser: browser/devtools/sourceeditor/codemirror/matchbrackets.js@6474c204b198 (annotated)

browser/devtools/sourceeditor/codemirror/matchbrackets.js@6474c204b198 (annotated)

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.

 (function(mod) {
   if (typeof exports == "object" && typeof module == "object") // CommonJS
     mod(require("../../lib/codemirror"));
   else if (typeof define == "function" && define.amd) // AMD
     define(["../../lib/codemirror"], mod);
   else // Plain browser env
     mod(CodeMirror);
 })(function(CodeMirror) {
   var ie_lt8 = /MSIE \d/.test(navigator.userAgent) &&
     (document.documentMode == null || document.documentMode < 8);
   var Pos = CodeMirror.Pos;
   var matching = {"(": ")>", ")": "(<", "[": "]>", "]": "[<", "{": "}>", "}": "{<"};
   function findMatchingBracket(cm, where, strict, config) {
     var line = cm.getLineHandle(where.line), pos = where.ch - 1;
     var match = (pos >= 0 && matching[line.text.charAt(pos)]) || matching[line.text.charAt(++pos)];
     if (!match) return null;
     var dir = match.charAt(1) == ">" ? 1 : -1;
     if (strict && (dir > 0) != (pos == where.ch)) return null;
     var style = cm.getTokenTypeAt(Pos(where.line, pos + 1));
     var found = scanForBracket(cm, Pos(where.line, pos + (dir > 0 ? 1 : 0)), dir, style || null, config);
     return {from: Pos(where.line, pos), to: found && found.pos,
             match: found && found.ch == match.charAt(0), forward: dir > 0};
   }
   function scanForBracket(cm, where, dir, style, config) {
     var maxScanLen = (config && config.maxScanLineLength) || 10000;
     var maxScanLines = (config && config.maxScanLines) || 500;
     var stack = [], re = /[(){}[\]]/;
     var lineEnd = dir > 0 ? Math.min(where.line + maxScanLines, cm.lastLine() + 1)
                           : Math.max(cm.firstLine() - 1, where.line - maxScanLines);
     for (var lineNo = where.line; lineNo != lineEnd; lineNo += dir) {
       var line = cm.getLine(lineNo);
       if (!line) continue;
       var pos = dir > 0 ? 0 : line.length - 1, end = dir > 0 ? line.length : -1;
       if (line.length > maxScanLen) continue;
       if (lineNo == where.line) pos = where.ch - (dir < 0 ? 1 : 0);
       for (; pos != end; pos += dir) {
         var ch = line.charAt(pos);
         if (re.test(ch) && (style === undefined || cm.getTokenTypeAt(Pos(lineNo, pos + 1)) == style)) {
           var match = matching[ch];
           if ((match.charAt(1) == ">") == (dir > 0)) stack.push(ch);
           else if (!stack.length) return {pos: Pos(lineNo, pos), ch: ch};
           else stack.pop();
         }
       }
     }
   }
   function matchBrackets(cm, autoclear, config) {
     // Disable brace matching in long lines, since it'll cause hugely slow updates
     var maxHighlightLen = cm.state.matchBrackets.maxHighlightLineLength || 1000;
     var marks = [], ranges = cm.listSelections();
     for (var i = 0; i < ranges.length; i++) {
       var match = ranges[i].empty() && findMatchingBracket(cm, ranges[i].head, false, config);
       if (match && cm.getLine(match.from.line).length <= maxHighlightLen &&
           match.to && cm.getLine(match.to.line).length <= maxHighlightLen) {
         var style = match.match ? "CodeMirror-matchingbracket" : "CodeMirror-nonmatchingbracket";
         marks.push(cm.markText(match.from, Pos(match.from.line, match.from.ch + 1), {className: style}));
         if (match.to)
           marks.push(cm.markText(match.to, Pos(match.to.line, match.to.ch + 1), {className: style}));
       }
     }
     if (marks.length) {
       // Kludge to work around the IE bug from issue #1193, where text
       // input stops going to the textare whever this fires.
       if (ie_lt8 && cm.state.focused) cm.display.input.focus();
       var clear = function() {
         cm.operation(function() {
           for (var i = 0; i < marks.length; i++) marks[i].clear();
         });
       };
       if (autoclear) setTimeout(clear, 800);
       else return clear;
     }
   }
   var currentlyHighlighted = null;
   function doMatchBrackets(cm) {
     cm.operation(function() {
       if (currentlyHighlighted) {currentlyHighlighted(); currentlyHighlighted = null;}
       currentlyHighlighted = matchBrackets(cm, false, cm.state.matchBrackets);
     });
   }
   CodeMirror.defineOption("matchBrackets", false, function(cm, val, old) {
     if (old && old != CodeMirror.Init)
       cm.off("cursorActivity", doMatchBrackets);
     if (val) {
       cm.state.matchBrackets = typeof val == "object" ? val : {};
       cm.on("cursorActivity", doMatchBrackets);
     }
   });
   CodeMirror.defineExtension("matchBrackets", function() {matchBrackets(this, true);});
   CodeMirror.defineExtension("findMatchingBracket", function(pos, strict){
     return findMatchingBracket(this, pos, strict);
   });
   CodeMirror.defineExtension("scanForBracket", function(pos, dir, style){
     return scanForBracket(this, pos, dir, style);
   });
 });