1 files changed, 117 insertions, 0 deletions

diff --git a/imports/codemirror/lib/util/searchcursor.js b/imports/codemirror/lib/util/searchcursor.js
new file mode 100755
index 00000000..3b77829f
--- /dev/null
+++ b/imports/codemirror/lib/util/searchcursor.js
@@ -0,0 +1,117 @@
+(function(){
+  function SearchCursor(cm, query, pos, caseFold) {
+    this.atOccurrence = false; this.cm = cm;
+    if (caseFold == null) caseFold = typeof query == "string" && query == query.toLowerCase();
+
+    pos = pos ? cm.clipPos(pos) : {line: 0, ch: 0};
+    this.pos = {from: pos, to: pos};
+
+    // The matches method is filled in based on the type of query.
+    // It takes a position and a direction, and returns an object
+    // describing the next occurrence of the query, or null if no
+    // more matches were found.
+    if (typeof query != "string") // Regexp match
+      this.matches = function(reverse, pos) {
+        if (reverse) {
+          var line = cm.getLine(pos.line).slice(0, pos.ch), match = line.match(query), start = 0;
+          while (match) {
+            var ind = line.indexOf(match[0]);
+            start += ind;
+            line = line.slice(ind + 1);
+            var newmatch = line.match(query);
+            if (newmatch) match = newmatch;
+            else break;
+            start++;
+          }
+        }
+        else {
+          var line = cm.getLine(pos.line).slice(pos.ch), match = line.match(query),
+          start = match && pos.ch + line.indexOf(match[0]);
+        }
+        if (match)
+          return {from: {line: pos.line, ch: start},
+                  to: {line: pos.line, ch: start + match[0].length},
+                  match: match};
+      };
+    else { // String query
+      if (caseFold) query = query.toLowerCase();
+      var fold = caseFold ? function(str){return str.toLowerCase();} : function(str){return str;};
+      var target = query.split("\n");
+      // Different methods for single-line and multi-line queries
+      if (target.length == 1)
+        this.matches = function(reverse, pos) {
+          var line = fold(cm.getLine(pos.line)), len = query.length, match;
+          if (reverse ? (pos.ch >= len && (match = line.lastIndexOf(query, pos.ch - len)) != -1)
+              : (match = line.indexOf(query, pos.ch)) != -1)
+            return {from: {line: pos.line, ch: match},
+                    to: {line: pos.line, ch: match + len}};
+        };
+      else
+        this.matches = function(reverse, pos) {
+          var ln = pos.line, idx = (reverse ? target.length - 1 : 0), match = target[idx], line = fold(cm.getLine(ln));
+          var offsetA = (reverse ? line.indexOf(match) + match.length : line.lastIndexOf(match));
+          if (reverse ? offsetA >= pos.ch || offsetA != match.length
+              : offsetA <= pos.ch || offsetA != line.length - match.length)
+            return;
+          for (;;) {
+            if (reverse ? !ln : ln == cm.lineCount() - 1) return;
+            line = fold(cm.getLine(ln += reverse ? -1 : 1));
+            match = target[reverse ? --idx : ++idx];
+            if (idx > 0 && idx < target.length - 1) {
+              if (line != match) return;
+              else continue;
+            }
+            var offsetB = (reverse ? line.lastIndexOf(match) : line.indexOf(match) + match.length);
+            if (reverse ? offsetB != line.length - match.length : offsetB != match.length)
+              return;
+            var start = {line: pos.line, ch: offsetA}, end = {line: ln, ch: offsetB};
+            return {from: reverse ? end : start, to: reverse ? start : end};
+          }
+        };
+    }
+  }
+
+  SearchCursor.prototype = {
+    findNext: function() {return this.find(false);},
+    findPrevious: function() {return this.find(true);},
+
+    find: function(reverse) {
+      var self = this, pos = this.cm.clipPos(reverse ? this.pos.from : this.pos.to);
+      function savePosAndFail(line) {
+        var pos = {line: line, ch: 0};
+        self.pos = {from: pos, to: pos};
+        self.atOccurrence = false;
+        return false;
+      }
+
+      for (;;) {
+        if (this.pos = this.matches(reverse, pos)) {
+          this.atOccurrence = true;
+          return this.pos.match || true;
+        }
+        if (reverse) {
+          if (!pos.line) return savePosAndFail(0);
+          pos = {line: pos.line-1, ch: this.cm.getLine(pos.line-1).length};
+        }
+        else {
+          var maxLine = this.cm.lineCount();
+          if (pos.line == maxLine - 1) return savePosAndFail(maxLine);
+          pos = {line: pos.line+1, ch: 0};
+        }
+      }
+    },
+
+    from: function() {if (this.atOccurrence) return this.pos.from;},
+    to: function() {if (this.atOccurrence) return this.pos.to;},
+
+    replace: function(newText) {
+      var self = this;
+      if (this.atOccurrence)
+        self.pos.to = this.cm.replaceRange(newText, self.pos.from, self.pos.to);
+    }
+  };
+
+  CodeMirror.defineExtension("getSearchCursor", function(query, pos, caseFold) {
+    return new SearchCursor(this, query, pos, caseFold);
+  });
+})();