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