DevTools: [CodeMirror] roll CodeMirror to version @e20d175

Source/devtools/front_end/cm/matchbrackets.js

+// CodeMirror, copyright (c) by Marijn Haverbeke and others
+// Distributed under an MIT license: http://codemirror.net/LICENSE
+
 (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);
+    if (found == null) return null;
     return {from: Pos(where.line, pos), to: found && found.pos,
             match: found && found.ch == match.charAt(0), forward: dir > 0};
   }
 
   // bracketRegex is used to specify which type of bracket to scan
   // should be a regexp, e.g. /[[\]]/
   //
   // Note: If "where" is on an open bracket, then this bracket is ignored.
+  //
+  // Returns false when no bracket was found, null when it reached
+  // maxScanLines and gave up
   function scanForBracket(cm, where, dir, style, config) {
     var maxScanLen = (config && config.maxScanLineLength) || 10000;
-    var maxScanLines = (config && config.maxScanLines) || 500;
+    var maxScanLines = (config && config.maxScanLines) || 1000;
 
     var stack = [];
     var re = config && config.bracketRegex ? config.bracketRegex : /[(){}[\]]/;
     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();
         }
       }
     }
+    return lineNo - dir == (dir > 0 ? cm.lastLine() : cm.firstLine()) ? false : null;
   }
 
   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) {
+      if (match && cm.getLine(match.from.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)
+        if (match.to && cm.getLine(match.to.line).length <= maxHighlightLen)
           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() {
@@ skipping 24 matching lines @@
   });
 
   CodeMirror.defineExtension("matchBrackets", function() {matchBrackets(this, true);});
   CodeMirror.defineExtension("findMatchingBracket", function(pos, strict, config){
     return findMatchingBracket(this, pos, strict, config);
   });
   CodeMirror.defineExtension("scanForBracket", function(pos, dir, style, config){
     return scanForBracket(this, pos, dir, style, config);
   });
 });