124 lines
3.8 KiB
TypeScript
124 lines
3.8 KiB
TypeScript
import {Injectable, ViewMetadata, Type, BaseException} from '@angular/core';
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import {ViewResolver} from '../index';
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import {Map} from '../src/facade/collection';
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import {isPresent, stringify, isBlank, isArray} from '../src/facade/lang';
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import {resolveForwardRef} from '@angular/core';
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@Injectable()
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export class MockViewResolver extends ViewResolver {
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/** @internal */
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_views = new Map<Type, ViewMetadata>();
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/** @internal */
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_inlineTemplates = new Map<Type, string>();
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/** @internal */
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_viewCache = new Map<Type, ViewMetadata>();
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/** @internal */
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_directiveOverrides = new Map<Type, Map<Type, Type>>();
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constructor() { super(); }
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/**
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* Overrides the {@link ViewMetadata} for a component.
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*/
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setView(component: Type, view: ViewMetadata): void {
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this._checkOverrideable(component);
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this._views.set(component, view);
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}
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/**
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* Overrides the inline template for a component - other configuration remains unchanged.
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*/
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setInlineTemplate(component: Type, template: string): void {
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this._checkOverrideable(component);
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this._inlineTemplates.set(component, template);
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}
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/**
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* Overrides a directive from the component {@link ViewMetadata}.
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*/
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overrideViewDirective(component: Type, from: Type, to: Type): void {
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this._checkOverrideable(component);
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var overrides = this._directiveOverrides.get(component);
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if (isBlank(overrides)) {
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overrides = new Map<Type, Type>();
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this._directiveOverrides.set(component, overrides);
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}
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overrides.set(from, to);
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}
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/**
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* Returns the {@link ViewMetadata} for a component:
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* - Set the {@link ViewMetadata} to the overridden view when it exists or fallback to the default
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* `ViewResolver`,
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* see `setView`.
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* - Override the directives, see `overrideViewDirective`.
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* - Override the @View definition, see `setInlineTemplate`.
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*/
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resolve(component: Type): ViewMetadata {
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var view = this._viewCache.get(component);
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if (isPresent(view)) return view;
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view = this._views.get(component);
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if (isBlank(view)) {
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view = super.resolve(component);
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}
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var directives = [];
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var overrides = this._directiveOverrides.get(component);
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if (isPresent(overrides) && isPresent(view.directives)) {
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flattenArray(view.directives, directives);
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overrides.forEach((to, from) => {
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var srcIndex = directives.indexOf(from);
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if (srcIndex == -1) {
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throw new BaseException(
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`Overriden directive ${stringify(from)} not found in the template of ${stringify(component)}`);
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}
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directives[srcIndex] = to;
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});
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view = new ViewMetadata(
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{template: view.template, templateUrl: view.templateUrl, directives: directives});
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}
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var inlineTemplate = this._inlineTemplates.get(component);
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if (isPresent(inlineTemplate)) {
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view = new ViewMetadata(
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{template: inlineTemplate, templateUrl: null, directives: view.directives});
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}
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this._viewCache.set(component, view);
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return view;
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}
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/**
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* @internal
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*
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* Once a component has been compiled, the AppProtoView is stored in the compiler cache.
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*
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* Then it should not be possible to override the component configuration after the component
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* has been compiled.
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*/
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_checkOverrideable(component: Type): void {
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var cached = this._viewCache.get(component);
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if (isPresent(cached)) {
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throw new BaseException(
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`The component ${stringify(component)} has already been compiled, its configuration can not be changed`);
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}
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}
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}
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function flattenArray(tree: any[], out: Array<Type | any[]>): void {
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for (var i = 0; i < tree.length; i++) {
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var item = resolveForwardRef(tree[i]);
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if (isArray(item)) {
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flattenArray(item, out);
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} else {
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out.push(item);
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}
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}
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}
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