git.r.bdr.sh - rbdr/dotfiles/blob

   1 (function() {
   2   var matching = {"(": ")>", ")": "(<", "[": "]>", "]": "[<", "{": "}>", "}": "{<"};
   3   function findMatchingBracket(cm) {
   4     var cur = cm.getCursor(), line = cm.getLineHandle(cur.line), pos = cur.ch - 1;
   5     var match = (pos >= 0 && matching[line.text.charAt(pos)]) || matching[line.text.charAt(++pos)];
   6     if (!match) return null;
   7     var forward = match.charAt(1) == ">", d = forward ? 1 : -1;
   8     var style = cm.getTokenAt({line: cur.line, ch: pos + 1}).type;
   9
  10     var stack = [line.text.charAt(pos)], re = /[(){}[\]]/;
  11     function scan(line, lineNo, start) {
  12       if (!line.text) return;
  13       var pos = forward ? 0 : line.text.length - 1, end = forward ? line.text.length : -1;
  14       if (start != null) pos = start + d;
  15       for (; pos != end; pos += d) {
  16         var ch = line.text.charAt(pos);
  17         if (re.test(ch) && cm.getTokenAt({line: lineNo, ch: pos + 1}).type == style) {
  18           var match = matching[ch];
  19           if (match.charAt(1) == ">" == forward) stack.push(ch);
  20           else if (stack.pop() != match.charAt(0)) return {pos: pos, match: false};
  21           else if (!stack.length) return {pos: pos, match: true};
  22         }
  23       }
  24     }
  25     for (var i = cur.line, found, e = forward ? Math.min(i + 100, cm.lineCount()) : Math.max(-1, i - 100); i != e; i+=d) {
  26       if (i == cur.line) found = scan(line, i, pos);
  27       else found = scan(cm.getLineHandle(i), i);
  28       if (found) break;
  29     }
  30     return {from: {line: cur.line, ch: pos}, to: found && {line: i, ch: found.pos}, match: found && found.match};
  31   }
  32
  33   function matchBrackets(cm, autoclear) {
  34     var found = findMatchingBracket(cm);
  35     if (!found) return;
  36     var style = found.match ? "CodeMirror-matchingbracket" : "CodeMirror-nonmatchingbracket";
  37     var one = cm.markText(found.from, {line: found.from.line, ch: found.from.ch + 1},
  38                           {className: style});
  39     var two = found.to && cm.markText(found.to, {line: found.to.line, ch: found.to.ch + 1},
  40                                       {className: style});
  41     var clear = function() {
  42       cm.operation(function() { one.clear(); two && two.clear(); });
  43     };
  44     if (autoclear) setTimeout(clear, 800);
  45     else return clear;
  46   }
  47
  48   var currentlyHighlighted = null;
  49   function doMatchBrackets(cm) {
  50     cm.operation(function() {
  51       if (currentlyHighlighted) {currentlyHighlighted(); currentlyHighlighted = null;}
  52       if (!cm.somethingSelected()) currentlyHighlighted = matchBrackets(cm, false);
  53     });
  54   }
  55
  56   CodeMirror.defineOption("matchBrackets", false, function(cm, val) {
  57     if (val) cm.on("cursorActivity", doMatchBrackets);
  58     else cm.off("cursorActivity", doMatchBrackets);
  59   });
  60
  61   CodeMirror.defineExtension("matchBrackets", function() {matchBrackets(this, true);});
  62   CodeMirror.defineExtension("findMatchingBracket", function(){return findMatchingBracket(this);});
  63 })();