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Merge pull request #50 from plumelo/feature/NEOV-198-template-support
Cosmoz tabbed template behavior
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,108 @@ | ||
| <link rel="import" href="../polymer/polymer.html"> | ||
| <link rel="import" href="../cosmoz-templatize/cosmoz-templatize.html"> | ||
|
|
||
| <script> | ||
| /** | ||
| `Cosmoz.TabbedTemplateBehavior` | ||
| */ | ||
| (function () { | ||
| 'use strict'; | ||
|
|
||
| window.Cosmoz = window.Cosmoz || {}; | ||
|
|
||
| /** | ||
| * @polymerBehavior Cosmoz.TabbedTemplateBehavior | ||
| */ | ||
| Cosmoz.TabbedTemplateBehaviorImpl = { | ||
| properties: { | ||
|
|
||
| /** | ||
| * Set to true to render the template with a small delay even if the tab has never been selected. | ||
| */ | ||
| prerender: { | ||
| type: Boolean, | ||
| value: false, | ||
| observer: '_prerenderChanged' | ||
| } | ||
| }, | ||
|
|
||
| created() { | ||
| this._pendingProps = {}; | ||
| }, | ||
|
|
||
| attached() { | ||
| this._observer = Polymer.dom(this).observeNodes(this._onNodesChanged); | ||
| }, | ||
|
|
||
| detached() { | ||
| if (this._observer) { | ||
| Polymer.dom(this).unobserveNodes(this._observer); | ||
| this._observer = null; | ||
| } | ||
| this._templateInstance = null; | ||
| }, | ||
|
|
||
| _onNodesChanged() { | ||
| if (this._userTemplate) { | ||
| return; | ||
| } | ||
| const template = this.queryEffectiveChildren('template'); | ||
| if (!template) { | ||
| return; | ||
| } | ||
| this._userTemplate = template; | ||
| this._instanceCtor = Cosmoz.Templatize.templatize(template, this, { | ||
| instanceProps: {}, | ||
| parentModel: true, | ||
| forwardParentProp: this._forwardHostProp, | ||
| forwardHostProp: this._forwardHostProp | ||
| }); | ||
| if (!this.prerender && !this._shouldRender) { | ||
| return; | ||
| } | ||
| this.render(); | ||
| }, | ||
|
|
||
| render() { | ||
| this._shouldRender = true; | ||
| if (!this._userTemplate || this._templateInstance) { | ||
| return; | ||
| } | ||
| this.debounce('_createInstance', this._createInstance, 16); | ||
| }, | ||
|
|
||
| _prerenderChanged(prerender) { | ||
| if (!prerender) { | ||
| return; | ||
| } | ||
| this.render(); | ||
| }, | ||
|
|
||
| _createInstance() { | ||
| if (this._templateInstance || !this._instanceCtor) { | ||
| return; | ||
| } | ||
| const instance = new this._instanceCtor(this._pendingProps || {}); | ||
| this._templateInstance = instance; | ||
| Polymer.dom(this).appendChild(instance.root); | ||
| if (instance._flushProperties) { | ||
| instance._flushProperties(true); | ||
| } | ||
| }, | ||
|
|
||
| _forwardHostProp(prop, value) { | ||
| const instance = this._templateInstance; | ||
| if (!instance) { | ||
| this._pendingProps[prop] = value; | ||
| return; | ||
| } | ||
| if (instance.forwardHostProp) { | ||
| instance.forwardHostProp(prop, value); | ||
| return; | ||
| } | ||
| instance[prop] = value; | ||
| } | ||
| }; | ||
| Cosmoz.TabbedTemplateBehavior = [Cosmoz.TabbedTemplateBehaviorImpl]; | ||
| })(); | ||
| </script> |
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