wcfsetup/install/files/js/3rdParty/codemirror/addon/search/searchcursor.js

   1 (function(){
   2   var Pos = CodeMirror.Pos;
   3
   4   function SearchCursor(doc, query, pos, caseFold) {
   5     this.atOccurrence = false; this.doc = doc;
   6     if (caseFold == null && typeof query == "string") caseFold = false;
   7
   8     pos = pos ? doc.clipPos(pos) : Pos(0, 0);
   9     this.pos = {from: pos, to: pos};
  10
  11     // The matches method is filled in based on the type of query.
  12     // It takes a position and a direction, and returns an object
  13     // describing the next occurrence of the query, or null if no
  14     // more matches were found.
  15     if (typeof query != "string") { // Regexp match
  16       if (!query.global) query = new RegExp(query.source, query.ignoreCase ? "ig" : "g");
  17       this.matches = function(reverse, pos) {
  18         if (reverse) {
  19           query.lastIndex = 0;
  20           var line = doc.getLine(pos.line).slice(0, pos.ch), cutOff = 0, match, start;
  21           for (;;) {
  22             query.lastIndex = cutOff;
  23             var newMatch = query.exec(line);
  24             if (!newMatch) break;
  25             match = newMatch;
  26             start = match.index;
  27             cutOff = match.index + (match[0].length || 1);
  28             if (cutOff == line.length) break;
  29           }
  30           var matchLen = (match && match[0].length) || 0;
  31           if (!matchLen) {
  32             if (start == 0 && line.length == 0) {match = undefined;}
  33             else if (start != doc.getLine(pos.line).length) {
  34               matchLen++;
  35             }
  36           }
  37         } else {
  38           query.lastIndex = pos.ch;
  39           var line = doc.getLine(pos.line), match = query.exec(line);
  40           var matchLen = (match && match[0].length) || 0;
  41           var start = match && match.index;
  42           if (start + matchLen != line.length && !matchLen) matchLen = 1;
  43         }
  44         if (match && matchLen)
  45           return {from: Pos(pos.line, start),
  46                   to: Pos(pos.line, start + matchLen),
  47                   match: match};
  48       };
  49     } else { // String query
  50       if (caseFold) query = query.toLowerCase();
  51       var fold = caseFold ? function(str){return str.toLowerCase();} : function(str){return str;};
  52       var target = query.split("\n");
  53       // Different methods for single-line and multi-line queries
  54       if (target.length == 1) {
  55         if (!query.length) {
  56           // Empty string would match anything and never progress, so
  57           // we define it to match nothing instead.
  58           this.matches = function() {};
  59         } else {
  60           this.matches = function(reverse, pos) {
  61             var line = fold(doc.getLine(pos.line)), len = query.length, match;
  62             if (reverse ? (pos.ch >= len && (match = line.lastIndexOf(query, pos.ch - len)) != -1)
  63                         : (match = line.indexOf(query, pos.ch)) != -1)
  64               return {from: Pos(pos.line, match),
  65                       to: Pos(pos.line, match + len)};
  66           };
  67         }
  68       } else {
  69         this.matches = function(reverse, pos) {
  70           var ln = pos.line, idx = (reverse ? target.length - 1 : 0), match = target[idx], line = fold(doc.getLine(ln));
  71           var offsetA = (reverse ? line.indexOf(match) + match.length : line.lastIndexOf(match));
  72           if (reverse ? offsetA >= pos.ch || offsetA != match.length
  73               : offsetA <= pos.ch || offsetA != line.length - match.length)
  74             return;
  75           for (;;) {
  76             if (reverse ? !ln : ln == doc.lineCount() - 1) return;
  77             line = fold(doc.getLine(ln += reverse ? -1 : 1));
  78             match = target[reverse ? --idx : ++idx];
  79             if (idx > 0 && idx < target.length - 1) {
  80               if (line != match) return;
  81               else continue;
  82             }
  83             var offsetB = (reverse ? line.lastIndexOf(match) : line.indexOf(match) + match.length);
  84             if (reverse ? offsetB != line.length - match.length : offsetB != match.length)
  85               return;
  86             var start = Pos(pos.line, offsetA), end = Pos(ln, offsetB);
  87             return {from: reverse ? end : start, to: reverse ? start : end};
  88           }
  89         };
  90       }
  91     }
  92   }
  93
  94   SearchCursor.prototype = {
  95     findNext: function() {return this.find(false);},
  96     findPrevious: function() {return this.find(true);},
  97
  98     find: function(reverse) {
  99       var self = this, pos = this.doc.clipPos(reverse ? this.pos.from : this.pos.to);
 100       function savePosAndFail(line) {
 101         var pos = Pos(line, 0);
 102         self.pos = {from: pos, to: pos};
 103         self.atOccurrence = false;
 104         return false;
 105       }
 106
 107       for (;;) {
 108         if (this.pos = this.matches(reverse, pos)) {
 109           if (!this.pos.from || !this.pos.to) { console.log(this.matches, this.pos); }
 110           this.atOccurrence = true;
 111           return this.pos.match || true;
 112         }
 113         if (reverse) {
 114           if (!pos.line) return savePosAndFail(0);
 115           pos = Pos(pos.line-1, this.doc.getLine(pos.line-1).length);
 116         }
 117         else {
 118           var maxLine = this.doc.lineCount();
 119           if (pos.line == maxLine - 1) return savePosAndFail(maxLine);
 120           pos = Pos(pos.line + 1, 0);
 121         }
 122       }
 123     },
 124
 125     from: function() {if (this.atOccurrence) return this.pos.from;},
 126     to: function() {if (this.atOccurrence) return this.pos.to;},
 127
 128     replace: function(newText) {
 129       if (!this.atOccurrence) return;
 130       var lines = CodeMirror.splitLines(newText);
 131       this.doc.replaceRange(lines, this.pos.from, this.pos.to);
 132       this.pos.to = Pos(this.pos.from.line + lines.length - 1,
 133                         lines[lines.length - 1].length + (lines.length == 1 ? this.pos.from.ch : 0));
 134     }
 135   };
 136
 137   CodeMirror.defineExtension("getSearchCursor", function(query, pos, caseFold) {
 138     return new SearchCursor(this.doc, query, pos, caseFold);
 139   });
 140   CodeMirror.defineDocExtension("getSearchCursor", function(query, pos, caseFold) {
 141     return new SearchCursor(this, query, pos, caseFold);
 142   });
 143 })();