RenditionBase.ts
73 lines
| 2.4 KiB
| video/mp2t
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r65 | import { isNull, mixin } from "@implab/core-amd/safe"; | ||
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r96 | import { isPlainObject, DojoNodePosition, Rendition, isDocumentFragmentNode, placeAt, collectNodes, autostartWidgets } from "./traits"; | ||
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r96 | import { IScope } from "./Scope"; | ||
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r98 | import { getScope } from "./render"; | ||
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r65 | |||
| export abstract class RenditionBase<TNode extends Node> implements Rendition<TNode> { | ||||
| private _attrs = {}; | ||||
| private _children = new Array(); | ||||
| private _created: boolean = false; | ||||
| visitNext(v: any) { | ||||
| if (this._created) | ||||
| throw new Error("The Element is already created"); | ||||
| if (isNull(v) || typeof v === "boolean") | ||||
| // skip null, undefined, booleans ( this will work: {value && <span>{value}</span>} ) | ||||
| return; | ||||
| if (isPlainObject(v)) { | ||||
| mixin(this._attrs, v); | ||||
| } else if (v instanceof Array) { | ||||
| v.forEach(x => this.visitNext(x)); | ||||
| } else { | ||||
| this._children.push(v); | ||||
| } | ||||
| } | ||||
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r96 | ensureCreated(scope: IScope) { | ||
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r65 | if (!this._created) { | ||
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r96 | this._create(this._attrs, this._children, scope); | ||
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r65 | this._children = []; | ||
| this._attrs = {}; | ||||
| this._created = true; | ||||
| } | ||||
| } | ||||
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r93 | /** Is rendition was instantiated to the DOM node */ | ||
| isCreated() { | ||||
| return this._created; | ||||
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r65 | } | ||
| /** Creates DOM node if not created. No additional actions are taken. */ | ||||
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r96 | getDomNode(scope?: IScope) { | ||
| this.ensureCreated(scope || getScope()); | ||||
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r65 | return this._getDomNode(); | ||
| } | ||||
| /** Creates DOM node if not created, places it to the specified position | ||||
| * and calls startup() method for all widgets contained by this node. | ||||
| * | ||||
| * @param {string | Node} refNode The reference node where the created | ||||
| * DOM should be placed. | ||||
| * @param {DojoNodePosition} position Optional parameter, specifies the | ||||
| * position relative to refNode. Default is "last" (i.e. last child). | ||||
| */ | ||||
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r96 | placeAt(refNode: string | Node, position: DojoNodePosition = "last") { | ||
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r65 | const domNode = this.getDomNode(); | ||
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r96 | const startupPending = isDocumentFragmentNode(domNode) ? collectNodes(domNode.children) : [domNode]; | ||
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r96 | placeAt(domNode, refNode, position); | ||
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r96 | startupPending.forEach(autostartWidgets); | ||
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r67 | |||
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r65 | } | ||
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r96 | protected abstract _create(attrs: object, children: unknown[], scope: IScope): void; | ||
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r65 | |||
| protected abstract _getDomNode(): TNode; | ||||
| } | ||||