Polymer elements added to third_party/polymer.

third_party/polymer/components/core-animated-pages/transitions/core-transition-pages.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
+-->
+
+<link href="../../polymer/polymer.html" rel="import">
+<link href="../../core-style/core-style.html" rel="import">
+<link href="../../core-transition/core-transition.html" rel="import">
+
+<!--
+
+`core-transition-pages` represents a page transition, which may include CSS and/or
+script. It will look for a `core-style` element with the same `id` to install in the
+scope of the `core-animated-pages` that's using the transition.
+
+Example:
+
+    <core-style id="fooTransition">
+        // some CSS here
+    </core-style>
+    <core-transition-pages id="fooTransition"></core-transition-pages>
+
+There are three stages to a page transition:
+
+1. `prepare`: Called to set up the incoming and outgoing pages to the "before" state,
+  e.g. setting the incoming page to `opacity: 0` for `cross-fade` or find and
+  measure hero elements for `hero-transition`.
+
+2. `go`: Called to run the transition. For CSS-based transitions, this generally
+  applies a CSS `transition` property.
+
+3. `complete`: Called when the elements are finished transitioning.
+
+See the individual transition documentation for specific details.
+
+@element core-transition-pages
+@extends core-transition
+@status beta
+@homepage github.io
+-->
+<!--
+Fired when the transition completes.
+
+@event core-transitionend
+-->
+<polymer-element name="core-transition-pages" extends="core-transition">
+<script>
+
+(function () {
+
+// create some basic transition styling data.
+var transitions = CoreStyle.g.transitions = CoreStyle.g.transitions || {};
+transitions.duration = '500ms';
+transitions.heroDelay = '50ms';
+transitions.scaleDelay = '500ms';
+transitions.cascadeFadeDuration = '250ms';
+
+Polymer({
+
+  publish: {
+    /**
+     * This class will be applied to the scope element in the `prepare` function.
+     * It is removed in the `complete` function. Used to activate a set of CSS
+     * rules that need to apply before the transition runs, e.g. a default opacity
+     * or transform for the non-active pages.
+     *
+     * @attribute scopeClass
+     * @type string
+     * @default ''
+     */
+    scopeClass: '',
+
+    /**
+     * This class will be applied to the scope element in the `go` function. It is
+     * remoived in the `complete' function. Generally used to apply a CSS transition
+     * rule only during the transition.
+     *
+     * @attribute activeClass
+     * @type string
+     * @default ''
+     */
+    activeClass: '',
+
+    /**
+     * Specifies which CSS property to look for when it receives a `transitionEnd` event
+     * to determine whether the transition is complete. If not specified, the first
+     * transitionEnd event received will complete the transition.
+     *
+     * @attribute transitionProperty
+     * @type string
+     * @default ''
+     */
+    transitionProperty: ''
+  },
+
+  /**
+   * True if this transition is complete.
+   *
+   * @attribute completed
+   * @type boolean
+   * @default false
+   */
+  completed: false,
+
+  prepare: function(scope, options) {
+    this.boundCompleteFn = this.complete.bind(this, scope);
+    if (this.scopeClass) {
+      scope.classList.add(this.scopeClass);
+    }
+  },
+
+  go: function(scope, options) {
+    this.completed = false;
+    if (this.activeClass) {
+      scope.classList.add(this.activeClass);
+    }
+    scope.addEventListener('transitionend', this.boundCompleteFn, false);
+  },
+
+  setup: function(scope) {
+    if (!scope._pageTransitionStyles) {
+      scope._pageTransitionStyles = {};
+    }
+
+    var name = this.calcStyleName();
+    
+    if (!scope._pageTransitionStyles[name]) {
+      this.installStyleInScope(scope, name);
+      scope._pageTransitionStyles[name] = true;
+    }
+  },
+
+  calcStyleName: function() {
+    return this.id || this.localName;
+  },
+
+  installStyleInScope: function(scope, id) {
+    if (!scope.shadowRoot) {
+      scope.createShadowRoot().innerHTML = '<content></content>';
+    }
+    var root = scope.shadowRoot;
+    var scopeStyle = document.createElement('core-style');
+    root.insertBefore(scopeStyle, root.firstChild);
+    scopeStyle.applyRef(id);
+  },
+
+  complete: function(scope, e) {
+    // TODO(yvonne): hack, need to manage completion better
+    if (e.propertyName !== 'box-shadow' && (!this.transitionProperty || e.propertyName.indexOf(this.transitionProperty) !== -1)) {
+      this.completed = true;
+      this.fire('core-transitionend', this, scope);
+    }
+  },
+
+  // TODO(sorvell): ideally we do this in complete.
+  ensureComplete: function(scope) {
+    scope.removeEventListener('transitionend', this.boundCompleteFn, false);
+    if (this.scopeClass) {
+      scope.classList.remove(this.scopeClass);
+    }
+    if (this.activeClass) {
+      scope.classList.remove(this.activeClass);
+    }
+  }
+
+});
+
+})();
+
+</script>
+</polymer-element>