npm_modules: Fork bower_components into Polymer 0.4.0 and 0.5.0 versions

polymer_0.5.0/bower_components/paper-dropdown/paper-dropdown-transition.html

+<!--
+Copyright (c) 2014 The Polymer Project Authors. All rights reserved.
+This code may only be used under the BSD style license found at http://polymer.github.io/LICENSE.txt
+The complete set of authors may be found at http://polymer.github.io/AUTHORS.txt
+The complete set of contributors may be found at http://polymer.github.io/CONTRIBUTORS.txt
+Code distributed by Google as part of the polymer project is also
+subject to an additional IP rights grant found at http://polymer.github.io/PATENTS.txt
+-->
+<!--
+
+`paper-dropdown-transition` is a transition for `paper-dropdown`.
+
+Add the class `menu` to a `core-selector` child of the `paper-dropdown` to
+enable the optional list cascade transition.
+
+@group Paper Elements
+@class paper-dropdown-transition
+@extends core-transition-css
+@status unstable
+-->
+<link href="../polymer/polymer.html" rel="import">
+<link href="../core-transition/core-transition-css.html" rel="import">
+<link href="../core-animation/web-animations.html" rel="import">
+
+<polymer-element name="paper-dropdown-transition" extends="core-transition-css">
+  <template>
+    <link href="paper-dropdown-transition.css" rel="stylesheet" no-shim>
+  </template>
+  <script>
+    Polymer('paper-dropdown-transition', {
+
+      publish: {
+
+        /**
+         * The duration of the transition in ms. You can also set the duration by
+         * setting a `duration` attribute on the target:
+         *
+         *    <paper-dropdown duration="1000"></paper-dropdown>
+         *
+         * @attribute duration
+         * @type number
+         * @default 500
+         */
+        duration: 500
+
+      },
+
+      setup: function(node) {
+        this.super(arguments);
+
+        var to = {
+          'top': '0%',
+          'left': '0%',
+          'bottom': '100%',
+          'right': '100%'
+        };
+
+        var bg = node.$.background;
+        bg.style.webkitTransformOrigin = to[node.halign] + ' ' + to[node.valign];
+        bg.style.transformOrigin = to[node.halign] + ' ' + to[node.valign];
+      },
+
+      transitionOpened: function(node, opened) {
+        this.super(arguments);
+
+        if (opened) {
+          if (this.player) {
+            this.player.cancel();
+          }
+
+          var duration = Number(node.getAttribute('duration')) || this.duration;
+
+          var anims = [];
+
+          var size = node.getBoundingClientRect();
+
+          var ink = node.$.ripple;
+          // var offset = 40 / Math.max(size.width, size.height);
+          var offset = 0.2;
+          anims.push(new Animation(ink, [{
+            'opacity': 0.9,
+            'transform': 'scale(0)',
+          }, {
+            'opacity': 0.9,
+            'transform': 'scale(1)'
+          }], {
+            duration: duration * offset
+          }));
+
+          var bg = node.$.background;
+          var sx = 40 / size.width;
+          var sy = 40 / size.height;
+          anims.push(new Animation(bg, [{
+            'opacity': 0.9,
+            'transform': 'scale(' + sx + ',' + sy + ')',
+          }, {
+            'opacity': 1,
+            'transform': 'scale(' + Math.max(sx, 0.95) + ',' + Math.max(sy, 0.5) + ')'
+          }, {
+            'opacity': 1,
+            'transform': 'scale(1, 1)'
+          }], {
+            delay: duration * offset,
+            duration: duration * (1 - offset),
+            fill: 'forwards'
+          }));
+
+          var menu = node.querySelector('.menu');
+          if (menu) {
+            var items = menu.items || menu.children.array();
+            var itemDelay = offset + (1 - offset) / 2;
+            var itemDuration = duration * (1 - itemDelay) / items.length;
+            var reverse = this.valign === 'bottom';
+
+            items.forEach(function(item, i) {
+              anims.push(new Animation(item, [{
+                'opacity': 0
+              }, {
+                'opacity': 1
+              }], {
+                delay: duration * itemDelay + itemDuration * (reverse ? items.length - 1 - i : i),
+                duration: itemDuration,
+                fill: 'both'
+              }));
+            }.bind(this));
+
+            anims.push(new Animation(node.$.scroller, [{
+              'opacity': 1
+            }, {
+              'opacity': 1
+            }], {
+              delay: duration * itemDelay,
+              duration: itemDuration * items.length,
+              fill: 'both'
+            }));
+
+          } else {
+            anims.push(new Animation(node.$.scroller, [{
+              'opacity': 0
+            }, {
+              'opacity': 1
+            }], {
+              delay: duration * (offset + (1 - offset) / 2),
+              duration: duration * 0.5,
+              fill: 'both'
+            }));
+          }
+
+          var group = new AnimationGroup(anims, {
+            easing: 'cubic-bezier(0.4, 0, 0.2, 1)'
+          });
+          this.player = document.timeline.play(group);
+          this.player.onfinish = function() {
+            this.fire('core-transitionend', this, node);
+          }.bind(this);
+
+        } else {
+          this.fire('core-transitionend', this, node);
+        }
+      },
+
+    });
+  </script>
+</polymer-element>
+
+<paper-dropdown-transition id="paper-dropdown-transition"></paper-dropdown-transition>