[search addon] Fix highlighting around \b markers in regexp search

Issue #2475

addon/search/search.js

@@ -16,21 +16,21 @@
 })(function(CodeMirror) {
   "use strict";
   function searchOverlay(query, caseInsensitive) {
-    var startChar;
-    if (typeof query == "string") {
-      startChar = query.charAt(0);
-      query = new RegExp("^" + query.replace(/[\-\[\]\/\{\}\(\)\*\+\?\.\\\^\$\|]/g, "\\$&"),
-                         caseInsensitive ? "i" : "");
-    } else {
-      query = new RegExp("^(?:" + query.source + ")", query.ignoreCase ? "i" : "");
-    }
+    if (typeof query == "string")
+      query = new RegExp(query.replace(/[\-\[\]\/\{\}\(\)\*\+\?\.\\\^\$\|]/g, "\\$&"), caseInsensitive ? "gi" : "g");
+    else if (!query.global)
+      query = new RegExp(query.source, query.ignoreCase ? "gi" : "g");
+
     return {token: function(stream) {
-      if (stream.match(query)) return "searching";
-      while (!stream.eol()) {
-        stream.next();
-        if (startChar && !caseInsensitive)
-          stream.skipTo(startChar) || stream.skipToEnd();
-        if (stream.match(query, false)) break;
+      query.lastIndex = stream.pos;
+      var match = query.exec(stream.string);
+      if (match && match.index == stream.pos) {
+        stream.pos += match[0].length;
+        return "searching";
+      } else if (match) {
+        stream.pos = match.index;
+      } else {
+        stream.skipToEnd();
       }
     }};
   }