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@angular/core

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Angular - the core framework

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/** * @fileoverview added by tsickle * @suppress {checkTypes,extraRequire,missingOverride,missingReturn,unusedPrivateMembers,uselessCode} checked by tsc */ /** * @license * Copyright Google Inc. All Rights Reserved. * * Use of this source code is governed by an MIT-style license that can be * found in the LICENSE file at https://angular.io/license */ /** * Used to resolve resource URLs on `\@Component` when used with JIT compilation. * * Example: * ``` * \@Component({ * selector: 'my-comp', * templateUrl: 'my-comp.html', // This requires asynchronous resolution * }) * class MyComponent{ * } * * // Calling `renderComponent` will fail because `renderComponent` is a synchronous process * // and `MyComponent`'s `\@Component.templateUrl` needs to be resolved asynchronously. * * // Calling `resolveComponentResources()` will resolve `\@Component.templateUrl` into * // `\@Component.template`, which allows `renderComponent` to proceed in a synchronous manner. * * // Use browser's `fetch()` function as the default resource resolution strategy. * resolveComponentResources(fetch).then(() => { * // After resolution all URLs have been converted into `template` strings. * renderComponent(MyComponent); * }); * * ``` * * NOTE: In AOT the resolution happens during compilation, and so there should be no need * to call this method outside JIT mode. * * @param {?} resourceResolver a function which is responsible for returning a `Promise` to the * contents of the resolved URL. Browser's `fetch()` method is a good default implementation. * @return {?} */ export function resolveComponentResources(resourceResolver) { // Store all promises which are fetching the resources. /** @type {?} */ const componentResolved = []; // Cache so that we don't fetch the same resource more than once. /** @type {?} */ const urlMap = new Map(); /** * @param {?} url * @return {?} */ function cachedResourceResolve(url) { /** @type {?} */ let promise = urlMap.get(url); if (!promise) { /** @type {?} */ const resp = resourceResolver(url); urlMap.set(url, promise = resp.then(unwrapResponse)); } return promise; } componentResourceResolutionQueue.forEach((/** * @param {?} component * @param {?} type * @return {?} */ (component, type) => { /** @type {?} */ const promises = []; if (component.templateUrl) { promises.push(cachedResourceResolve(component.templateUrl).then((/** * @param {?} template * @return {?} */ (template) => { component.template = template; }))); } /** @type {?} */ const styleUrls = component.styleUrls; /** @type {?} */ const styles = component.styles || (component.styles = []); /** @type {?} */ const styleOffset = component.styles.length; styleUrls && styleUrls.forEach((/** * @param {?} styleUrl * @param {?} index * @return {?} */ (styleUrl, index) => { styles.push(''); // pre-allocate array. promises.push(cachedResourceResolve(styleUrl).then((/** * @param {?} style * @return {?} */ (style) => { styles[styleOffset + index] = style; styleUrls.splice(styleUrls.indexOf(styleUrl), 1); if (styleUrls.length == 0) { component.styleUrls = undefined; } }))); })); /** @type {?} */ const fullyResolved = Promise.all(promises).then((/** * @return {?} */ () => componentDefResolved(type))); componentResolved.push(fullyResolved); })); clearResolutionOfComponentResourcesQueue(); return Promise.all(componentResolved).then((/** * @return {?} */ () => undefined)); } /** @type {?} */ let componentResourceResolutionQueue = new Map(); // Track when existing ngComponentDef for a Type is waiting on resources. /** @type {?} */ const componentDefPendingResolution = new Set(); /** * @param {?} type * @param {?} metadata * @return {?} */ export function maybeQueueResolutionOfComponentResources(type, metadata) { if (componentNeedsResolution(metadata)) { componentResourceResolutionQueue.set(type, metadata); componentDefPendingResolution.add(type); } } /** * @param {?} type * @return {?} */ export function isComponentDefPendingResolution(type) { return componentDefPendingResolution.has(type); } /** * @param {?} component * @return {?} */ export function componentNeedsResolution(component) { return !!((component.templateUrl && !component.hasOwnProperty('template')) || component.styleUrls && component.styleUrls.length); } /** * @return {?} */ export function clearResolutionOfComponentResourcesQueue() { /** @type {?} */ const old = componentResourceResolutionQueue; componentResourceResolutionQueue = new Map(); return old; } /** * @param {?} queue * @return {?} */ export function restoreComponentResolutionQueue(queue) { componentDefPendingResolution.clear(); queue.forEach((/** * @param {?} _ * @param {?} type * @return {?} */ (_, type) => componentDefPendingResolution.add(type))); componentResourceResolutionQueue = queue; } /** * @return {?} */ export function isComponentResourceResolutionQueueEmpty() { return componentResourceResolutionQueue.size === 0; } /** * @param {?} response * @return {?} */ function unwrapResponse(response) { return typeof response == 'string' ? 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All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {Type} from '../interface/type';\nimport {Component} from './directives';\n\n\n/**\n * Used to resolve resource URLs on `@Component` when used with JIT compilation.\n *\n * Example:\n * ```\n * @Component({\n *   selector: 'my-comp',\n *   templateUrl: 'my-comp.html', // This requires asynchronous resolution\n * })\n * class MyComponent{\n * }\n *\n * // Calling `renderComponent` will fail because `renderComponent` is a synchronous process\n * // and `MyComponent`'s `@Component.templateUrl` needs to be resolved asynchronously.\n *\n * // Calling `resolveComponentResources()` will resolve `@Component.templateUrl` into\n * // `@Component.template`, which allows `renderComponent` to proceed in a synchronous manner.\n *\n * // Use browser's `fetch()` function as the default resource resolution strategy.\n * resolveComponentResources(fetch).then(() => {\n *   // After resolution all URLs have been converted into `template` strings.\n *   renderComponent(MyComponent);\n * });\n *\n * ```\n *\n * NOTE: In AOT the resolution happens during compilation, and so there should be no need\n * to call this method outside JIT mode.\n *\n * @param resourceResolver a function which is responsible for returning a `Promise` to the\n * contents of the resolved URL. Browser's `fetch()` method is a good default implementation.\n */\nexport function resolveComponentResources(\n    resourceResolver: (url: string) => (Promise<string|{text(): Promise<string>}>)): Promise<void> {\n  // Store all promises which are fetching the resources.\n  const componentResolved: Promise<void>[] = [];\n\n  // Cache so that we don't fetch the same resource more than once.\n  const urlMap = new Map<string, Promise<string>>();\n  function cachedResourceResolve(url: string): Promise<string> {\n    let promise = urlMap.get(url);\n    if (!promise) {\n      const resp = resourceResolver(url);\n      urlMap.set(url, promise = resp.then(unwrapResponse));\n    }\n    return promise;\n  }\n\n  componentResourceResolutionQueue.forEach((component: Component, type: Type<any>) => {\n    const promises: Promise<void>[] = [];\n    if (component.templateUrl) {\n      promises.push(cachedResourceResolve(component.templateUrl).then((template) => {\n        component.template = template;\n      }));\n    }\n    const styleUrls = component.styleUrls;\n    const styles = component.styles || (component.styles = []);\n    const styleOffset = component.styles.length;\n    styleUrls && styleUrls.forEach((styleUrl, index) => {\n      styles.push('');  // pre-allocate array.\n      promises.push(cachedResourceResolve(styleUrl).then((style) => {\n        styles[styleOffset + index] = style;\n        styleUrls.splice(styleUrls.indexOf(styleUrl), 1);\n        if (styleUrls.length == 0) {\n          component.styleUrls = undefined;\n        }\n      }));\n    });\n    const fullyResolved = Promise.all(promises).then(() => componentDefResolved(type));\n    componentResolved.push(fullyResolved);\n  });\n  clearResolutionOfComponentResourcesQueue();\n  return Promise.all(componentResolved).then(() => undefined);\n}\n\nlet componentResourceResolutionQueue = new Map<Type<any>, Component>();\n\n// Track when existing ngComponentDef for a Type is waiting on resources.\nconst componentDefPendingResolution = new Set<Type<any>>();\n\nexport function maybeQueueResolutionOfComponentResources(type: Type<any>, metadata: Component) {\n  if (componentNeedsResolution(metadata)) {\n    componentResourceResolutionQueue.set(type, metadata);\n    componentDefPendingResolution.add(type);\n  }\n}\n\nexport function isComponentDefPendingResolution(type: Type<any>): boolean {\n  return componentDefPendingResolution.has(type);\n}\n\nexport function componentNeedsResolution(component: Component): boolean {\n  return !!(\n      (component.templateUrl && !component.hasOwnProperty('template')) ||\n      component.styleUrls && component.styleUrls.length);\n}\nexport function clearResolutionOfComponentResourcesQueue(): Map<Type<any>, Component> {\n  const old = componentResourceResolutionQueue;\n  componentResourceResolutionQueue = new Map();\n  return old;\n}\n\nexport function restoreComponentResolutionQueue(queue: Map<Type<any>, Component>): void {\n  componentDefPendingResolution.clear();\n  queue.forEach((_, type) => componentDefPendingResolution.add(type));\n  componentResourceResolutionQueue = queue;\n}\n\nexport function isComponentResourceResolutionQueueEmpty() {\n  return componentResourceResolutionQueue.size === 0;\n}\n\nfunction unwrapResponse(response: string | {text(): Promise<string>}): string|Promise<string> {\n  return typeof response == 'string' ? response : response.text();\n}\n\nfunction componentDefResolved(type: Type<any>): void {\n  componentDefPendingResolution.delete(type);\n}"]}