angular2
Version:
Angular 2 - a web framework for modern web apps
110 lines • 14.7 kB
JavaScript
import { Map, ListWrapper } from 'angular2/src/facade/collection';
import { isPresent, stringify, isBlank } from 'angular2/src/facade/lang';
import { BaseException } from 'angular2/src/facade/exceptions';
import { ViewMetadata } from '../core/metadata';
import { ViewResolver } from 'angular2/src/core/linker/view_resolver';
export class MockViewResolver extends ViewResolver {
constructor() {
super();
/** @internal */
this._views = new Map();
/** @internal */
this._inlineTemplates = new Map();
/** @internal */
this._viewCache = new Map();
/** @internal */
this._directiveOverrides = new Map();
}
/**
* Overrides the {@link ViewMetadata} for a component.
*
* @param {Type} component
* @param {ViewDefinition} view
*/
setView(component, view) {
this._checkOverrideable(component);
this._views.set(component, view);
}
/**
* Overrides the inline template for a component - other configuration remains unchanged.
*
* @param {Type} component
* @param {string} template
*/
setInlineTemplate(component, template) {
this._checkOverrideable(component);
this._inlineTemplates.set(component, template);
}
/**
* Overrides a directive from the component {@link ViewMetadata}.
*
* @param {Type} component
* @param {Type} from
* @param {Type} to
*/
overrideViewDirective(component, from, to) {
this._checkOverrideable(component);
var overrides = this._directiveOverrides.get(component);
if (isBlank(overrides)) {
overrides = new Map();
this._directiveOverrides.set(component, overrides);
}
overrides.set(from, to);
}
/**
* Returns the {@link ViewMetadata} for a component:
* - Set the {@link ViewMetadata} to the overridden view when it exists or fallback to the default
* `ViewResolver`,
* see `setView`.
* - Override the directives, see `overrideViewDirective`.
* - Override the @View definition, see `setInlineTemplate`.
*
* @param component
* @returns {ViewDefinition}
*/
resolve(component) {
var view = this._viewCache.get(component);
if (isPresent(view))
return view;
view = this._views.get(component);
if (isBlank(view)) {
view = super.resolve(component);
}
var directives = view.directives;
var overrides = this._directiveOverrides.get(component);
if (isPresent(overrides) && isPresent(directives)) {
directives = ListWrapper.clone(view.directives);
overrides.forEach((to, from) => {
var srcIndex = directives.indexOf(from);
if (srcIndex == -1) {
throw new BaseException(`Overriden directive ${stringify(from)} not found in the template of ${stringify(component)}`);
}
directives[srcIndex] = to;
});
view = new ViewMetadata({ template: view.template, templateUrl: view.templateUrl, directives: directives });
}
var inlineTemplate = this._inlineTemplates.get(component);
if (isPresent(inlineTemplate)) {
view = new ViewMetadata({ template: inlineTemplate, templateUrl: null, directives: view.directives });
}
this._viewCache.set(component, view);
return view;
}
/**
* @internal
*
* Once a component has been compiled, the AppProtoView is stored in the compiler cache.
*
* Then it should not be possible to override the component configuration after the component
* has been compiled.
*
* @param {Type} component
*/
_checkOverrideable(component) {
var cached = this._viewCache.get(component);
if (isPresent(cached)) {
throw new BaseException(`The component ${stringify(component)} has already been compiled, its configuration can not be changed`);
}
}
}
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}\n\n  /**\n   * Overrides the {@link ViewMetadata} for a component.\n   *\n   * @param {Type} component\n   * @param {ViewDefinition} view\n   */\n  setView(component: Type, view: ViewMetadata): void {\n    this._checkOverrideable(component);\n    this._views.set(component, view);\n  }\n\n  /**\n   * Overrides the inline template for a component - other configuration remains unchanged.\n   *\n   * @param {Type} component\n   * @param {string} template\n   */\n  setInlineTemplate(component: Type, template: string): void {\n    this._checkOverrideable(component);\n    this._inlineTemplates.set(component, template);\n  }\n\n  /**\n   * Overrides a directive from the component {@link ViewMetadata}.\n   *\n   * @param {Type} component\n   * @param {Type} from\n   * @param {Type} to\n   */\n  overrideViewDirective(component: Type, from: Type, to: Type): void {\n    this._checkOverrideable(component);\n\n    var overrides = this._directiveOverrides.get(component);\n\n    if (isBlank(overrides)) {\n      overrides = new Map<Type, Type>();\n      this._directiveOverrides.set(component, overrides);\n    }\n\n    overrides.set(from, to);\n  }\n\n  /**\n   * Returns the {@link ViewMetadata} for a component:\n   * - Set the {@link ViewMetadata} to the overridden view when it exists or fallback to the default\n   * `ViewResolver`,\n   *   see `setView`.\n   * - Override the directives, see `overrideViewDirective`.\n   * - Override the @View definition, see `setInlineTemplate`.\n   *\n   * @param component\n   * @returns {ViewDefinition}\n   */\n  resolve(component: Type): ViewMetadata {\n    var view = this._viewCache.get(component);\n    if (isPresent(view)) return view;\n\n    view = this._views.get(component);\n    if (isBlank(view)) {\n      view = super.resolve(component);\n    }\n\n    var directives = view.directives;\n    var overrides = this._directiveOverrides.get(component);\n\n    if (isPresent(overrides) && isPresent(directives)) {\n      directives = ListWrapper.clone(view.directives);\n      overrides.forEach((to, from) => {\n        var srcIndex = directives.indexOf(from);\n        if (srcIndex == -1) {\n          throw new BaseException(\n              `Overriden directive ${stringify(from)} not found in the template of ${stringify(component)}`);\n        }\n        directives[srcIndex] = to;\n      });\n      view = new ViewMetadata(\n          {template: view.template, templateUrl: view.templateUrl, directives: directives});\n    }\n\n    var inlineTemplate = this._inlineTemplates.get(component);\n    if (isPresent(inlineTemplate)) {\n      view = new ViewMetadata(\n          {template: inlineTemplate, templateUrl: null, directives: view.directives});\n    }\n\n    this._viewCache.set(component, view);\n    return view;\n  }\n\n  /**\n   * @internal\n   *\n   * Once a component has been compiled, the AppProtoView is stored in the compiler cache.\n   *\n   * Then it should not be possible to override the component configuration after the component\n   * has been compiled.\n   *\n   * @param {Type} component\n   */\n  _checkOverrideable(component: Type): void {\n    var cached = this._viewCache.get(component);\n\n    if (isPresent(cached)) {\n      throw new BaseException(\n          `The component ${stringify(component)} has already been compiled, its configuration can not be changed`);\n    }\n  }\n}\n"]}