WidgetRendition.ts
130 lines
| 4.8 KiB
| video/mp2t
|
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r65 | import { argumentNotNull } from "@implab/core-amd/safe"; | ||
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r97 | import { RenditionBase } from "./RenditionBase"; | ||
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r96 | import { DojoNodePosition, isElementNode, isInPage, isWidget, placeAt } from "./traits"; | ||
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r65 | import registry = require("dijit/registry"); | ||
import ContentPane = require("dijit/layout/ContentPane"); | ||||
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r102 | import { getItemDom, refHook } from "./render"; | ||
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r65 | |||
// tslint:disable-next-line: class-name | ||||
export interface _Widget { | ||||
domNode: Node; | ||||
containerNode?: Node; | ||||
placeAt?(refNode: string | Node, position?: DojoNodePosition): void; | ||||
startup?(): void; | ||||
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r101 | addChild?(widget: unknown, index?: number): void; | ||
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r65 | } | ||
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r109 | export type _WidgetCtor = new (attrs: object, srcNode?: string | Node) => _Widget; | ||
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r65 | |||
export class WidgetRendition extends RenditionBase<Node> { | ||||
readonly widgetClass: _WidgetCtor; | ||||
_instance: _Widget | undefined; | ||||
constructor(widgetClass: _WidgetCtor) { | ||||
super(); | ||||
argumentNotNull(widgetClass, "widgetClass"); | ||||
this.widgetClass = widgetClass; | ||||
} | ||||
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r102 | _addChild(child: unknown): void { | ||
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r65 | const instance = this._getInstance(); | ||
if (instance.addChild) { | ||||
if (child instanceof WidgetRendition) { | ||||
// layout containers add custom logic to addChild methods | ||||
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r102 | instance.addChild(child.getWidgetInstance()); | ||
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r65 | } else if (isWidget(child)) { | ||
instance.addChild(child); | ||||
} else { | ||||
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r101 | const childDom = getItemDom(child); | ||
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r91 | const w = isElementNode(childDom) ? registry.byNode(childDom) : undefined; | ||
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r65 | |||
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r91 | if (w) { | ||
instance.addChild(w); | ||||
} else { | ||||
if (!instance.containerNode) | ||||
throw new Error("Failed to add DOM content. The widget doesn't have a containerNode"); | ||||
// the current widget isn't started, it's children shouldn't start too | ||||
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r101 | placeAt(getItemDom(child), instance.containerNode, "last"); | ||
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r91 | } | ||
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r65 | } | ||
} else { | ||||
if (!instance.containerNode) | ||||
throw new Error("The widget doesn't have neither addChild nor containerNode"); | ||||
// the current widget isn't started, it's children shouldn't start too | ||||
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r101 | placeAt(getItemDom(child), instance.containerNode, "last"); | ||
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r65 | } | ||
} | ||||
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r102 | protected _create({ref, ...attrs}: {ref?: JSX.Ref<_Widget>}, children: unknown[]) { | ||
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r65 | if (this.widgetClass.prototype instanceof ContentPane) { | ||
// a special case for the ContentPane this is for | ||||
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r101 | // compatibility with that heavy widget, all | ||
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r65 | // regular containers could be easily manipulated | ||
// through `containerNode` property or `addChild` method. | ||||
// render children to the DocumentFragment | ||||
const content = document.createDocumentFragment(); | ||||
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r101 | children.forEach(child => content.appendChild(getItemDom(child))); | ||
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r65 | |||
// set the content property to the parameters of the widget | ||||
const _attrs = { ...attrs, content }; | ||||
this._instance = new this.widgetClass(_attrs); | ||||
} else { | ||||
this._instance = new this.widgetClass(attrs); | ||||
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r102 | children.forEach(x => this._addChild(x)); | ||
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r65 | } | ||
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r102 | if (ref) | ||
refHook(this._instance, ref); | ||||
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r65 | } | ||
private _getInstance() { | ||||
if (!this._instance) | ||||
throw new Error("The instance of the widget isn't created"); | ||||
return this._instance; | ||||
} | ||||
protected _getDomNode() { | ||||
if (!this._instance) | ||||
throw new Error("The instance of the widget isn't created"); | ||||
return this._instance.domNode; | ||||
} | ||||
/** Overrides default placeAt implementation. Calls placeAt of the | ||||
* widget and then starts it. | ||||
* | ||||
* @param refNode A node or id of the node where the widget should be placed. | ||||
* @param position A position relative to refNode. | ||||
*/ | ||||
placeAt(refNode: string | Node, position?: DojoNodePosition) { | ||||
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r102 | this.ensureCreated(); | ||
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r65 | const instance = this._getInstance(); | ||
if (typeof instance.placeAt === "function") { | ||||
instance.placeAt(refNode, position); | ||||
// fix the dojo startup behavior when the widget is placed | ||||
// directly to the document and doesn't have any enclosing widgets | ||||
const parentWidget = instance.domNode.parentNode ? | ||||
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r79 | registry.getEnclosingWidget(instance.domNode.parentNode) : null; | ||
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r65 | if (!parentWidget && isInPage(instance.domNode) && typeof instance.startup === "function") | ||
instance.startup(); | ||||
} else { | ||||
// the widget doesn't have a placeAt method, strange but whatever | ||||
super.placeAt(refNode, position); | ||||
} | ||||
} | ||||
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r102 | getWidgetInstance() { | ||
this.ensureCreated(); | ||||
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r65 | return this._getInstance(); | ||
} | ||||
} | ||||