Index: polymer_1.0.4/bower_components/iron-resizable-behavior/iron-resizable-behavior.html |
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+<!-- |
+@license |
+Copyright (c) 2015 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 rel="import" href="../polymer/polymer.html"> |
+ |
+<script> |
+ /** |
+ * `IronResizableBehavior` is a behavior that can be used in Polymer elements to |
+ * coordinate the flow of resize events between "resizers" (elements that control the |
+ * size or hidden state of their children) and "resizables" (elements that need to be |
+ * notified when they are resized or un-hidden by their parents in order to take |
+ * action on their new measurements). |
+ * Elements that perform measurement should add the `IronResizableBehavior` behavior to |
+ * their element definition and listen for the `iron-resize` event on themselves. |
+ * This event will be fired when they become showing after having been hidden, |
+ * when they are resized explicitly by another resizable, or when the window has been |
+ * resized. |
+ * Note, the `iron-resize` event is non-bubbling. |
+ * |
+ * @polymerBehavior Polymer.IronResizableBehavior |
+ * @demo demo/index.html |
+ **/ |
+ Polymer.IronResizableBehavior = { |
+ properties: { |
+ /** |
+ * The closest ancestor element that implements `IronResizableBehavior`. |
+ */ |
+ _parentResizable: { |
+ type: Object, |
+ observer: '_parentResizableChanged' |
+ }, |
+ |
+ /** |
+ * True if this element is currently notifying its descedant elements of |
+ * resize. |
+ */ |
+ _notifyingDescendant: { |
+ type: Boolean, |
+ value: false |
+ } |
+ }, |
+ |
+ listeners: { |
+ 'iron-request-resize-notifications': '_onIronRequestResizeNotifications' |
+ }, |
+ |
+ created: function() { |
+ // We don't really need property effects on these, and also we want them |
+ // to be created before the `_parentResizable` observer fires: |
+ this._interestedResizables = []; |
+ this._boundNotifyResize = this.notifyResize.bind(this); |
+ }, |
+ |
+ attached: function() { |
+ this.fire('iron-request-resize-notifications', null, { |
+ node: this, |
+ bubbles: true, |
+ cancelable: true |
+ }); |
+ |
+ if (!this._parentResizable) { |
+ window.addEventListener('resize', this._boundNotifyResize); |
+ this.notifyResize(); |
+ } |
+ }, |
+ |
+ detached: function() { |
+ if (this._parentResizable) { |
+ this._parentResizable.stopResizeNotificationsFor(this); |
+ } else { |
+ window.removeEventListener('resize', this._boundNotifyResize); |
+ } |
+ |
+ this._parentResizable = null; |
+ }, |
+ |
+ /** |
+ * Can be called to manually notify a resizable and its descendant |
+ * resizables of a resize change. |
+ */ |
+ notifyResize: function() { |
+ if (!this.isAttached) { |
+ return; |
+ } |
+ |
+ this._interestedResizables.forEach(function(resizable) { |
+ if (this.resizerShouldNotify(resizable)) { |
+ this._notifyDescendant(resizable); |
+ } |
+ }, this); |
+ |
+ this._fireResize(); |
+ }, |
+ |
+ /** |
+ * Used to assign the closest resizable ancestor to this resizable |
+ * if the ancestor detects a request for notifications. |
+ */ |
+ assignParentResizable: function(parentResizable) { |
+ this._parentResizable = parentResizable; |
+ }, |
+ |
+ /** |
+ * Used to remove a resizable descendant from the list of descendants |
+ * that should be notified of a resize change. |
+ */ |
+ stopResizeNotificationsFor: function(target) { |
+ var index = this._interestedResizables.indexOf(target); |
+ |
+ if (index > -1) { |
+ this._interestedResizables.splice(index, 1); |
+ this.unlisten(target, 'iron-resize', '_onDescendantIronResize'); |
+ } |
+ }, |
+ |
+ /** |
+ * This method can be overridden to filter nested elements that should or |
+ * should not be notified by the current element. Return true if an element |
+ * should be notified, or false if it should not be notified. |
+ * |
+ * @param {HTMLElement} element A candidate descendant element that |
+ * implements `IronResizableBehavior`. |
+ * @return {boolean} True if the `element` should be notified of resize. |
+ */ |
+ resizerShouldNotify: function(element) { return true; }, |
+ |
+ _onDescendantIronResize: function(event) { |
+ if (this._notifyingDescendant) { |
+ event.stopPropagation(); |
+ return; |
+ } |
+ |
+ // NOTE(cdata): In ShadowDOM, event retargetting makes echoing of the |
+ // otherwise non-bubbling event "just work." We do it manually here for |
+ // the case where Polymer is not using shadow roots for whatever reason: |
+ if (!Polymer.Settings.useShadow) { |
+ this._fireResize(); |
+ } |
+ }, |
+ |
+ _fireResize: function() { |
+ this.fire('iron-resize', null, { |
+ node: this, |
+ bubbles: false |
+ }); |
+ }, |
+ |
+ _onIronRequestResizeNotifications: function(event) { |
+ var target = event.path ? event.path[0] : event.target; |
+ |
+ if (target === this) { |
+ return; |
+ } |
+ |
+ if (this._interestedResizables.indexOf(target) === -1) { |
+ this._interestedResizables.push(target); |
+ this.listen(target, 'iron-resize', '_onDescendantIronResize'); |
+ } |
+ |
+ target.assignParentResizable(this); |
+ this._notifyDescendant(target); |
+ |
+ event.stopPropagation(); |
+ }, |
+ |
+ _parentResizableChanged: function(parentResizable) { |
+ if (parentResizable) { |
+ window.removeEventListener('resize', this._boundNotifyResize); |
+ } |
+ }, |
+ |
+ _notifyDescendant: function(descendant) { |
+ // NOTE(cdata): In IE10, attached is fired on children first, so it's |
+ // important not to notify them if the parent is not attached yet (or |
+ // else they will get redundantly notified when the parent attaches). |
+ if (!this.isAttached) { |
+ return; |
+ } |
+ |
+ this._notifyingDescendant = true; |
+ descendant.notifyResize(); |
+ this._notifyingDescendant = false; |
+ } |
+ }; |
+</script> |
+ |