1 files changed, 70 insertions, 0 deletions
diff --git a/apps/system/js/mouse2touch.js b/apps/system/js/mouse2touch.js
new file mode 100644
index 0000000..b9d6a89
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+++ b/apps/system/js/mouse2touch.js
@@ -0,0 +1,70 @@
+/* -*- Mode: Java; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- /
+/* vim: set shiftwidth=2 tabstop=2 autoindent cindent expandtab: */
+
+'use strict';
+
+/*
+*  Mouse2Touch is a shim that listens to MouseEvent but passes
+*  fake TouchEvent object to touch event handler
+*
+*  XXX: remove this if we are not going to support testing on
+*  non-touch devices, e.g. B2G Desktop, Nightly, or,
+*  make the creation of this object optional if we can reliably detect
+*  touch support by evaluate (document instanceof DocumentTouch)
+*
+*/
+var Mouse2Touch = (function m2t() {
+  var Mouse2TouchEvent = {
+   'mousedown': 'touchstart',
+   'mousemove': 'touchmove',
+   'mouseup': 'touchend'
+  };
+
+  var Touch2MouseEvent = {
+   'touchstart': 'mousedown',
+   'touchmove': 'mousemove',
+   'touchend': 'mouseup'
+  };
+
+  var ForceOnWindow = {
+   'touchmove': true,
+   'touchend': true
+  };
+
+  var addEventHandler = function m2t_addEventHandlers(target,
+                                                      name,
+                                                      listener) {
+   target = ForceOnWindow[name] ? window : target;
+   name = Touch2MouseEvent[name] || name;
+   target.addEventListener(name, {
+     handleEvent: function m2t_handleEvent(evt) {
+       if (Mouse2TouchEvent[evt.type]) {
+         var original = evt;
+         evt = {
+           type: Mouse2TouchEvent[original.type],
+           target: original.target,
+           touches: [original],
+           preventDefault: function() {
+             original.preventDefault();
+           }
+         };
+         evt.changedTouches = evt.touches;
+       }
+       return listener.handleEvent(evt);
+     }
+   }, true);
+  };
+
+  var removeEventHandler = function m2t_removeEventHandler(target,
+                                                           name,
+                                                           listener) {
+   target = ForceOnWindow[name] ? window : target;
+   name = Touch2MouseEvent[name] || name;
+   target.removeEventListener(name, listener);
+  };
+
+  return {
+    addEventHandler: addEventHandler,
+    removeEventHandler: removeEventHandler
+  };
+})();