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

   1 (function(){
   2   function SearchCursor(cm, query, pos, caseFold) {
   3     this.atOccurrence = false; this.cm = cm;
   4     if (caseFold == null && typeof query == "string") caseFold = false;
   5
   6     pos = pos ? cm.clipPos(pos) : {line: 0, ch: 0};
   7     this.pos = {from: pos, to: pos};
   8
   9     // The matches method is filled in based on the type of query.
  10     // It takes a position and a direction, and returns an object
  11     // describing the next occurrence of the query, or null if no
  12     // more matches were found.
  13     if (typeof query != "string") { // Regexp match
  14       if (!query.global) query = new RegExp(query.source, query.ignoreCase ? "ig" : "g");
  15       this.matches = function(reverse, pos) {
  16         if (reverse) {
  17           query.lastIndex = 0;
  18           var line = cm.getLine(pos.line).slice(0, pos.ch), match = query.exec(line), start = 0;
  19           while (match) {
  20             start += match.index + 1;
  21             line = line.slice(start);
  22             query.lastIndex = 0;
  23             var newmatch = query.exec(line);
  24             if (newmatch) match = newmatch;
  25             else break;
  26           }
  27           start--;
  28         } else {
  29           query.lastIndex = pos.ch;
  30           var line = cm.getLine(pos.line), match = query.exec(line),
  31           start = match && match.index;
  32         }
  33         if (match)
  34           return {from: {line: pos.line, ch: start},
  35                   to: {line: pos.line, ch: start + match[0].length},
  36                   match: match};
  37       };
  38     } else { // String query
  39       if (caseFold) query = query.toLowerCase();
  40       var fold = caseFold ? function(str){return str.toLowerCase();} : function(str){return str;};
  41       var target = query.split("\n");
  42       // Different methods for single-line and multi-line queries
  43       if (target.length == 1)
  44         this.matches = function(reverse, pos) {
  45           var line = fold(cm.getLine(pos.line)), len = query.length, match;
  46           if (reverse ? (pos.ch >= len && (match = line.lastIndexOf(query, pos.ch - len)) != -1)
  47               : (match = line.indexOf(query, pos.ch)) != -1)
  48             return {from: {line: pos.line, ch: match},
  49                     to: {line: pos.line, ch: match + len}};
  50         };
  51       else
  52         this.matches = function(reverse, pos) {
  53           var ln = pos.line, idx = (reverse ? target.length - 1 : 0), match = target[idx], line = fold(cm.getLine(ln));
  54           var offsetA = (reverse ? line.indexOf(match) + match.length : line.lastIndexOf(match));
  55           if (reverse ? offsetA >= pos.ch || offsetA != match.length
  56               : offsetA <= pos.ch || offsetA != line.length - match.length)
  57             return;
  58           for (;;) {
  59             if (reverse ? !ln : ln == cm.lineCount() - 1) return;
  60             line = fold(cm.getLine(ln += reverse ? -1 : 1));
  61             match = target[reverse ? --idx : ++idx];
  62             if (idx > 0 && idx < target.length - 1) {
  63               if (line != match) return;
  64               else continue;
  65             }
  66             var offsetB = (reverse ? line.lastIndexOf(match) : line.indexOf(match) + match.length);
  67             if (reverse ? offsetB != line.length - match.length : offsetB != match.length)
  68               return;
  69             var start = {line: pos.line, ch: offsetA}, end = {line: ln, ch: offsetB};
  70             return {from: reverse ? end : start, to: reverse ? start : end};
  71           }
  72         };
  73     }
  74   }
  75
  76   SearchCursor.prototype = {
  77     findNext: function() {return this.find(false);},
  78     findPrevious: function() {return this.find(true);},
  79
  80     find: function(reverse) {
  81       var self = this, pos = this.cm.clipPos(reverse ? this.pos.from : this.pos.to);
  82       function savePosAndFail(line) {
  83         var pos = {line: line, ch: 0};
  84         self.pos = {from: pos, to: pos};
  85         self.atOccurrence = false;
  86         return false;
  87       }
  88
  89       for (;;) {
  90         if (this.pos = this.matches(reverse, pos)) {
  91           this.atOccurrence = true;
  92           return this.pos.match || true;
  93         }
  94         if (reverse) {
  95           if (!pos.line) return savePosAndFail(0);
  96           pos = {line: pos.line-1, ch: this.cm.getLine(pos.line-1).length};
  97         }
  98         else {
  99           var maxLine = this.cm.lineCount();
 100           if (pos.line == maxLine - 1) return savePosAndFail(maxLine);
 101           pos = {line: pos.line+1, ch: 0};
 102         }
 103       }
 104     },
 105
 106     from: function() {if (this.atOccurrence) return this.pos.from;},
 107     to: function() {if (this.atOccurrence) return this.pos.to;},
 108
 109     replace: function(newText) {
 110       var self = this;
 111       if (this.atOccurrence)
 112         self.pos.to = this.cm.replaceRange(newText, self.pos.from, self.pos.to);
 113     }
 114   };
 115
 116   CodeMirror.defineExtension("getSearchCursor", function(query, pos, caseFold) {
 117     return new SearchCursor(this, query, pos, caseFold);
 118   });
 119 })();