1 files changed, 35 insertions, 0 deletions
diff --git a/frontend/gamma/js/Zepto/gesture.js b/frontend/gamma/js/Zepto/gesture.js
new file mode 100644
index 0000000..035455b
--- a/dev/null
+++ b/frontend/gamma/js/Zepto/gesture.js
@@ -0,0 +1,35 @@
+//     Zepto.js
+//     (c) 2010-2012 Thomas Fuchs
+//     Zepto.js may be freely distributed under the MIT license.
+
+;(function($){
+  if ($.os.ios) {
+    var gesture = {}, gestureTimeout
+
+    function parentIfText(node){
+      return 'tagName' in node ? node : node.parentNode
+    }
+
+    $(document).bind('gesturestart', function(e){
+      var now = Date.now(), delta = now - (gesture.last || now)
+      gesture.target = parentIfText(e.target)
+      gestureTimeout && clearTimeout(gestureTimeout)
+      gesture.e1 = e.scale
+      gesture.last = now
+    }).bind('gesturechange', function(e){
+      gesture.e2 = e.scale
+    }).bind('gestureend', function(e){
+      if (gesture.e2 > 0) {
+        Math.abs(gesture.e1 - gesture.e2) != 0 && $(gesture.target).trigger('pinch') &&
+          $(gesture.target).trigger('pinch' + (gesture.e1 - gesture.e2 > 0 ? 'In' : 'Out'))
+        gesture.e1 = gesture.e2 = gesture.last = 0
+      } else if ('last' in gesture) {
+        gesture = {}
+      }
+    })
+
+    ;['pinch', 'pinchIn', 'pinchOut'].forEach(function(m){
+      $.fn[m] = function(callback){ return this.bind(m, callback) }
+    })
+  }
+})(Zepto)