44 lines
1.6 KiB
TypeScript
44 lines
1.6 KiB
TypeScript
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/**
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* @license
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* Copyright Google Inc. All Rights Reserved.
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*
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* Use of this source code is governed by an MIT-style license that can be
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* found in the LICENSE file at https://angular.io/license
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*/
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import {StyleSanitizeFn} from '../../sanitization/style_sanitizer';
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import {LContext, getContext} from '../context_discovery';
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import {LElementNode} from '../interfaces/node';
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import {PlayerContext} from '../interfaces/player';
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import {InitialStyles, StylingContext, StylingIndex} from '../interfaces/styling';
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export const EMPTY_ARR: any[] = [];
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export const EMPTY_OBJ: {[key: string]: any} = {};
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export function createEmptyStylingContext(
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element?: LElementNode | null, sanitizer?: StyleSanitizeFn | null,
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initialStylingValues?: InitialStyles): StylingContext {
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return [
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element || null, null, sanitizer || null, initialStylingValues || [null], 0, 0, null, null
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];
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}
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export function getOrCreatePlayerContext(target: {}, context?: LContext | null): PlayerContext {
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context = context || getContext(target) !;
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if (ngDevMode && !context) {
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throw new Error(
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'Only elements that exist in an Angular application can be used for player access');
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}
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const {lViewData, lNodeIndex} = context;
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const value = lViewData[lNodeIndex];
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let stylingContext = value as StylingContext;
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if (!Array.isArray(value)) {
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stylingContext = lViewData[lNodeIndex] = createEmptyStylingContext(value as LElementNode);
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}
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return stylingContext[StylingIndex.PlayerContext] || allocPlayerContext(stylingContext);
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}
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function allocPlayerContext(data: StylingContext): PlayerContext {
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return data[StylingIndex.PlayerContext] = [];
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}
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