chore(ngMobile): rename module ngTouch and file to angular-touch.js

BREAKING CHANGE: since all the code in the ngMobile module is touch related,
we are renaming the module to ngTouch.

To migrate, please replace all references to "ngMobile" with "ngTouch" and
"angular-mobile.js" to "angular-touch.js".

Closes #3526

1 files changed, 114 insertions, 0 deletions

diff --git a/src/ngTouch/directive/ngSwipe.js b/src/ngTouch/directive/ngSwipe.js
new file mode 100644
index 00000000..e754113c
--- /dev/null
+++ b/src/ngTouch/directive/ngSwipe.js
@@ -0,0 +1,114 @@
+'use strict';
+
+/**
+ * @ngdoc directive
+ * @name ngTouch.directive:ngSwipeLeft
+ *
+ * @description
+ * Specify custom behavior when an element is swiped to the left on a touchscreen device.
+ * A leftward swipe is a quick, right-to-left slide of the finger.
+ * Though ngSwipeLeft is designed for touch-based devices, it will work with a mouse click and drag too.
+ *
+ * @element ANY
+ * @param {expression} ngSwipeLeft {@link guide/expression Expression} to evaluate
+ * upon left swipe. (Event object is available as `$event`)
+ *
+ * @example
+    <doc:example>
+      <doc:source>
+        <div ng-show="!showActions" ng-swipe-left="showActions = true">
+          Some list content, like an email in the inbox
+        </div>
+        <div ng-show="showActions" ng-swipe-right="showActions = false">
+          <button ng-click="reply()">Reply</button>
+          <button ng-click="delete()">Delete</button>
+        </div>
+      </doc:source>
+    </doc:example>
+ */
+
+/**
+ * @ngdoc directive
+ * @name ngTouch.directive:ngSwipeRight
+ *
+ * @description
+ * Specify custom behavior when an element is swiped to the right on a touchscreen device.
+ * A rightward swipe is a quick, left-to-right slide of the finger.
+ * Though ngSwipeRight is designed for touch-based devices, it will work with a mouse click and drag too.
+ *
+ * @element ANY
+ * @param {expression} ngSwipeRight {@link guide/expression Expression} to evaluate
+ * upon right swipe. (Event object is available as `$event`)
+ *
+ * @example
+    <doc:example>
+      <doc:source>
+        <div ng-show="!showActions" ng-swipe-left="showActions = true">
+          Some list content, like an email in the inbox
+        </div>
+        <div ng-show="showActions" ng-swipe-right="showActions = false">
+          <button ng-click="reply()">Reply</button>
+          <button ng-click="delete()">Delete</button>
+        </div>
+      </doc:source>
+    </doc:example>
+ */
+
+function makeSwipeDirective(directiveName, direction, eventName) {
+  ngTouch.directive(directiveName, ['$parse', '$swipe', function($parse, $swipe) {
+    // The maximum vertical delta for a swipe should be less than 75px.
+    var MAX_VERTICAL_DISTANCE = 75;
+    // Vertical distance should not be more than a fraction of the horizontal distance.
+    var MAX_VERTICAL_RATIO = 0.3;
+    // At least a 30px lateral motion is necessary for a swipe.
+    var MIN_HORIZONTAL_DISTANCE = 30;
+
+    return function(scope, element, attr) {
+      var swipeHandler = $parse(attr[directiveName]);
+
+      var startCoords, valid;
+
+      function validSwipe(coords) {
+        // Check that it's within the coordinates.
+        // Absolute vertical distance must be within tolerances.
+        // Horizontal distance, we take the current X - the starting X.
+        // This is negative for leftward swipes and positive for rightward swipes.
+        // After multiplying by the direction (-1 for left, +1 for right), legal swipes
+        // (ie. same direction as the directive wants) will have a positive delta and
+        // illegal ones a negative delta.
+        // Therefore this delta must be positive, and larger than the minimum.
+        if (!startCoords) return false;
+        var deltaY = Math.abs(coords.y - startCoords.y);
+        var deltaX = (coords.x - startCoords.x) * direction;
+        return valid && // Short circuit for already-invalidated swipes.
+            deltaY < MAX_VERTICAL_DISTANCE &&
+            deltaX > 0 &&
+            deltaX > MIN_HORIZONTAL_DISTANCE &&
+            deltaY / deltaX < MAX_VERTICAL_RATIO;
+      }
+
+      $swipe.bind(element, {
+        'start': function(coords) {
+          startCoords = coords;
+          valid = true;
+        },
+        'cancel': function() {
+          valid = false;
+        },
+        'end': function(coords) {
+          if (validSwipe(coords)) {
+            scope.$apply(function() {
+              element.triggerHandler(eventName);
+              swipeHandler(scope);
+            });
+          }
+        }
+      });
+    };
+  }]);
+}
+
+// Left is negative X-coordinate, right is positive.
+makeSwipeDirective('ngSwipeLeft', -1, 'swipeleft');
+makeSwipeDirective('ngSwipeRight', 1, 'swiperight');
+