1408 lines
52 KiB
TypeScript
1408 lines
52 KiB
TypeScript
/**
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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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/**
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* Suppress closure compiler errors about unknown 'global' variable
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* @fileoverview
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* @suppress {undefinedVars}
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*/
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/**
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* Zone is a mechanism for intercepting and keeping track of asynchronous work.
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*
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* A Zone is a global object which is configured with rules about how to intercept and keep track
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* of the asynchronous callbacks. Zone has these responsibilities:
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*
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* 1. Intercept asynchronous task scheduling
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* 2. Wrap callbacks for error-handling and zone tracking across async operations.
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* 3. Provide a way to attach data to zones
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* 4. Provide a context specific last frame error handling
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* 5. (Intercept blocking methods)
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*
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* A zone by itself does not do anything, instead it relies on some other code to route existing
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* platform API through it. (The zone library ships with code which monkey patches all of the
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* browsers's asynchronous API and redirects them through the zone for interception.)
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*
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* In its simplest form a zone allows one to intercept the scheduling and calling of asynchronous
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* operations, and execute additional code before as well as after the asynchronous task. The rules
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* of interception are configured using [ZoneConfig]. There can be many different zone instances in
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* a system, but only one zone is active at any given time which can be retrieved using
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* [Zone#current].
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*
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*
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*
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* ## Callback Wrapping
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*
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* An important aspect of the zones is that they should persist across asynchronous operations. To
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* achieve this, when a future work is scheduled through async API, it is necessary to capture, and
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* subsequently restore the current zone. For example if a code is running in zone `b` and it
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* invokes `setTimeout` to scheduleTask work later, the `setTimeout` method needs to 1) capture the
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* current zone and 2) wrap the `wrapCallback` in code which will restore the current zone `b` once
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* the wrapCallback executes. In this way the rules which govern the current code are preserved in
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* all future asynchronous tasks. There could be a different zone `c` which has different rules and
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* is associated with different asynchronous tasks. As these tasks are processed, each asynchronous
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* wrapCallback correctly restores the correct zone, as well as preserves the zone for future
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* asynchronous callbacks.
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*
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* Example: Suppose a browser page consist of application code as well as third-party
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* advertisement code. (These two code bases are independent, developed by different mutually
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* unaware developers.) The application code may be interested in doing global error handling and
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* so it configures the `app` zone to send all of the errors to the server for analysis, and then
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* executes the application in the `app` zone. The advertising code is interested in the same
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* error processing but it needs to send the errors to a different third-party. So it creates the
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* `ads` zone with a different error handler. Now both advertising as well as application code
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* create many asynchronous operations, but the [Zone] will ensure that all of the asynchronous
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* operations created from the application code will execute in `app` zone with its error
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* handler and all of the advertisement code will execute in the `ads` zone with its error handler.
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* This will not only work for the async operations created directly, but also for all subsequent
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* asynchronous operations.
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*
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* If you think of chain of asynchronous operations as a thread of execution (bit of a stretch)
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* then [Zone#current] will act as a thread local variable.
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*
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*
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*
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* ## Asynchronous operation scheduling
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*
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* In addition to wrapping the callbacks to restore the zone, all operations which cause a
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* scheduling of work for later are routed through the current zone which is allowed to intercept
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* them by adding work before or after the wrapCallback as well as using different means of
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* achieving the request. (Useful for unit testing, or tracking of requests). In some instances
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* such as `setTimeout` the wrapping of the wrapCallback and scheduling is done in the same
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* wrapCallback, but there are other examples such as `Promises` where the `then` wrapCallback is
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* wrapped, but the execution of `then` is triggered by `Promise` scheduling `resolve` work.
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*
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* Fundamentally there are three kinds of tasks which can be scheduled:
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*
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* 1. [MicroTask] used for doing work right after the current task. This is non-cancelable which is
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* guaranteed to run exactly once and immediately.
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* 2. [MacroTask] used for doing work later. Such as `setTimeout`. This is typically cancelable
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* which is guaranteed to execute at least once after some well understood delay.
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* 3. [EventTask] used for listening on some future event. This may execute zero or more times, with
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* an unknown delay.
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*
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* Each asynchronous API is modeled and routed through one of these APIs.
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*
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*
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* ### [MicroTask]
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*
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* [MicroTask]s represent work which will be done in current VM turn as soon as possible, before VM
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* yielding.
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*
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*
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* ### [MacroTask]
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*
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* [MacroTask]s represent work which will be done after some delay. (Sometimes the delay is
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* approximate such as on next available animation frame). Typically these methods include:
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* `setTimeout`, `setImmediate`, `setInterval`, `requestAnimationFrame`, and all browser specific
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* variants.
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*
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*
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* ### [EventTask]
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*
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* [EventTask]s represent a request to create a listener on an event. Unlike the other task
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* events they may never be executed, but typically execute more than once. There is no queue of
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* events, rather their callbacks are unpredictable both in order and time.
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*
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*
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* ## Global Error Handling
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*
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*
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* ## Composability
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*
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* Zones can be composed together through [Zone.fork()]. A child zone may create its own set of
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* rules. A child zone is expected to either:
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*
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* 1. Delegate the interception to a parent zone, and optionally add before and after wrapCallback
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* hooks.
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* 2. Process the request itself without delegation.
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*
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* Composability allows zones to keep their concerns clean. For example a top most zone may choose
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* to handle error handling, while child zones may choose to do user action tracking.
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*
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*
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* ## Root Zone
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*
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* At the start the browser will run in a special root zone, which is configured to behave exactly
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* like the platform, making any existing code which is not zone-aware behave as expected. All
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* zones are children of the root zone.
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*
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*/
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interface Zone {
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/**
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*
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* @returns {Zone} The parent Zone.
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*/
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parent: Zone|null;
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/**
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* @returns {string} The Zone name (useful for debugging)
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*/
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name: string;
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/**
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* Returns a value associated with the `key`.
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*
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* If the current zone does not have a key, the request is delegated to the parent zone. Use
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* [ZoneSpec.properties] to configure the set of properties associated with the current zone.
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*
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* @param key The key to retrieve.
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* @returns {any} The value for the key, or `undefined` if not found.
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*/
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get(key: string): any;
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/**
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* Returns a Zone which defines a `key`.
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*
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* Recursively search the parent Zone until a Zone which has a property `key` is found.
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*
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* @param key The key to use for identification of the returned zone.
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* @returns {Zone} The Zone which defines the `key`, `null` if not found.
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*/
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getZoneWith(key: string): Zone|null;
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/**
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* Used to create a child zone.
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*
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* @param zoneSpec A set of rules which the child zone should follow.
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* @returns {Zone} A new child zone.
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*/
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fork(zoneSpec: ZoneSpec): Zone;
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/**
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* Wraps a callback function in a new function which will properly restore the current zone upon
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* invocation.
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*
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* The wrapped function will properly forward `this` as well as `arguments` to the `callback`.
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*
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* Before the function is wrapped the zone can intercept the `callback` by declaring
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* [ZoneSpec.onIntercept].
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*
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* @param callback the function which will be wrapped in the zone.
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* @param source A unique debug location of the API being wrapped.
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* @returns {function(): *} A function which will invoke the `callback` through [Zone.runGuarded].
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*/
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wrap<F extends Function>(callback: F, source: string): F;
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/**
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* Invokes a function in a given zone.
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*
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* The invocation of `callback` can be intercepted by declaring [ZoneSpec.onInvoke].
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*
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* @param callback The function to invoke.
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* @param applyThis
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* @param applyArgs
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* @param source A unique debug location of the API being invoked.
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* @returns {any} Value from the `callback` function.
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*/
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run<T>(callback: Function, applyThis?: any, applyArgs?: any[], source?: string): T;
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/**
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* Invokes a function in a given zone and catches any exceptions.
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*
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* Any exceptions thrown will be forwarded to [Zone.HandleError].
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*
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* The invocation of `callback` can be intercepted by declaring [ZoneSpec.onInvoke]. The
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* handling of exceptions can be intercepted by declaring [ZoneSpec.handleError].
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*
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* @param callback The function to invoke.
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* @param applyThis
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* @param applyArgs
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* @param source A unique debug location of the API being invoked.
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* @returns {any} Value from the `callback` function.
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*/
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runGuarded<T>(callback: Function, applyThis?: any, applyArgs?: any[], source?: string): T;
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/**
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* Execute the Task by restoring the [Zone.currentTask] in the Task's zone.
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*
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* @param task to run
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* @param applyThis
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* @param applyArgs
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* @returns {*}
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*/
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runTask(task: Task, applyThis?: any, applyArgs?: any): any;
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/**
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* Schedule a MicroTask.
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*
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* @param source
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* @param callback
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* @param data
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* @param customSchedule
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*/
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scheduleMicroTask(
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source: string, callback: Function, data?: TaskData,
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customSchedule?: (task: Task) => void): MicroTask;
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/**
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* Schedule a MacroTask.
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*
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* @param source
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* @param callback
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* @param data
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* @param customSchedule
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* @param customCancel
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*/
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scheduleMacroTask(
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source: string, callback: Function, data?: TaskData, customSchedule?: (task: Task) => void,
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customCancel?: (task: Task) => void): MacroTask;
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/**
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* Schedule an EventTask.
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*
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* @param source
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* @param callback
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* @param data
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* @param customSchedule
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* @param customCancel
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*/
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scheduleEventTask(
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source: string, callback: Function, data?: TaskData, customSchedule?: (task: Task) => void,
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customCancel?: (task: Task) => void): EventTask;
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/**
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* Schedule an existing Task.
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*
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* Useful for rescheduling a task which was already canceled.
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*
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* @param task
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*/
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scheduleTask<T extends Task>(task: T): T;
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/**
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* Allows the zone to intercept canceling of scheduled Task.
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*
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* The interception is configured using [ZoneSpec.onCancelTask]. The default canceler invokes
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* the [Task.cancelFn].
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*
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* @param task
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* @returns {any}
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*/
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cancelTask(task: Task): any;
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}
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interface ZoneType {
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/**
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* @returns {Zone} Returns the current [Zone]. The only way to change
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* the current zone is by invoking a run() method, which will update the current zone for the
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* duration of the run method callback.
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*/
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current: Zone;
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/**
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* @returns {Task} The task associated with the current execution.
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*/
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currentTask: Task|null;
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/**
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* Verify that Zone has been correctly patched. Specifically that Promise is zone aware.
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*/
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assertZonePatched(): void;
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/**
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* Return the root zone.
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*/
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root: Zone;
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/** @internal */
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__load_patch(name: string, fn: _PatchFn): void;
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/** Was @ internal but this prevents compiling tests as separate unit */
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__symbol__(name: string): string;
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}
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/** @internal */
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type _PatchFn = (global: Window, Zone: ZoneType, api: _ZonePrivate) => void;
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/** @internal */
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interface _ZonePrivate {
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currentZoneFrame: () => _ZoneFrame;
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symbol: (name: string) => string;
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scheduleMicroTask: (task?: MicroTask) => void;
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onUnhandledError: (error: Error) => void;
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microtaskDrainDone: () => void;
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showUncaughtError: () => boolean;
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patchEventTarget: (global: any, apis: any[], options?: any) => boolean[];
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patchOnProperties: (obj: any, properties: string[]|null, prototype?: any) => void;
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patchThen: (ctro: Function) => void;
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setNativePromise: (nativePromise: any) => void;
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patchMethod:
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(target: any, name: string,
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patchFn: (delegate: Function, delegateName: string, name: string) =>
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(self: any, args: any[]) => any) => Function | null;
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bindArguments: (args: any[], source: string) => any[];
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patchMacroTask:
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(obj: any, funcName: string, metaCreator: (self: any, args: any[]) => any) => void;
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patchEventPrototype: (_global: any, api: _ZonePrivate) => void;
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isIEOrEdge: () => boolean;
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ObjectDefineProperty:
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(o: any, p: PropertyKey, attributes: PropertyDescriptor&ThisType<any>) => any;
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ObjectGetOwnPropertyDescriptor: (o: any, p: PropertyKey) => PropertyDescriptor | undefined;
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ObjectCreate(o: object|null, properties?: PropertyDescriptorMap&ThisType<any>): any;
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ArraySlice(start?: number, end?: number): any[];
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patchClass: (className: string) => void;
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wrapWithCurrentZone: (callback: any, source: string) => any;
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filterProperties: (target: any, onProperties: string[], ignoreProperties: any[]) => string[];
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attachOriginToPatched: (target: any, origin: any) => void;
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_redefineProperty: (target: any, callback: string, desc: any) => void;
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patchCallbacks:
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(api: _ZonePrivate, target: any, targetName: string, method: string,
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callbacks: string[]) => void;
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getGlobalObjects: () => {
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globalSources: any, zoneSymbolEventNames: any, eventNames: string[], isBrowser: boolean,
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isMix: boolean, isNode: boolean, TRUE_STR: string, FALSE_STR: string,
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ZONE_SYMBOL_PREFIX: string, ADD_EVENT_LISTENER_STR: string,
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REMOVE_EVENT_LISTENER_STR: string
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} | undefined;
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}
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/** @internal */
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interface _ZoneFrame {
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parent: _ZoneFrame|null;
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zone: Zone;
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}
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interface UncaughtPromiseError extends Error {
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zone: Zone;
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task: Task;
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promise: Promise<any>;
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rejection: any;
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}
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/**
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* Provides a way to configure the interception of zone events.
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*
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* Only the `name` property is required (all other are optional).
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*/
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interface ZoneSpec {
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/**
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* The name of the zone. Useful when debugging Zones.
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*/
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name: string;
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/**
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* A set of properties to be associated with Zone. Use [Zone.get] to retrieve them.
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*/
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properties?: {[key: string]: any};
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/**
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* Allows the interception of zone forking.
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*
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* When the zone is being forked, the request is forwarded to this method for interception.
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*
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* @param parentZoneDelegate Delegate which performs the parent [ZoneSpec] operation.
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* @param currentZone The current [Zone] where the current interceptor has been declared.
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* @param targetZone The [Zone] which originally received the request.
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* @param zoneSpec The argument passed into the `fork` method.
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*/
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onFork?:
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(parentZoneDelegate: ZoneDelegate, currentZone: Zone, targetZone: Zone,
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zoneSpec: ZoneSpec) => Zone;
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/**
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* Allows interception of the wrapping of the callback.
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*
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* @param parentZoneDelegate Delegate which performs the parent [ZoneSpec] operation.
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* @param currentZone The current [Zone] where the current interceptor has been declared.
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* @param targetZone The [Zone] which originally received the request.
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* @param delegate The argument passed into the `wrap` method.
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* @param source The argument passed into the `wrap` method.
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*/
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onIntercept?:
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(parentZoneDelegate: ZoneDelegate, currentZone: Zone, targetZone: Zone, delegate: Function,
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source: string) => Function;
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/**
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* Allows interception of the callback invocation.
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*
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* @param parentZoneDelegate Delegate which performs the parent [ZoneSpec] operation.
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* @param currentZone The current [Zone] where the current interceptor has been declared.
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* @param targetZone The [Zone] which originally received the request.
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* @param delegate The argument passed into the `run` method.
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* @param applyThis The argument passed into the `run` method.
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* @param applyArgs The argument passed into the `run` method.
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* @param source The argument passed into the `run` method.
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*/
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onInvoke?:
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(parentZoneDelegate: ZoneDelegate, currentZone: Zone, targetZone: Zone, delegate: Function,
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applyThis: any, applyArgs?: any[], source?: string) => any;
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/**
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* Allows interception of the error handling.
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*
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* @param parentZoneDelegate Delegate which performs the parent [ZoneSpec] operation.
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* @param currentZone The current [Zone] where the current interceptor has been declared.
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* @param targetZone The [Zone] which originally received the request.
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* @param error The argument passed into the `handleError` method.
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*/
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onHandleError?:
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(parentZoneDelegate: ZoneDelegate, currentZone: Zone, targetZone: Zone,
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error: any) => boolean;
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/**
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* Allows interception of task scheduling.
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*
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* @param parentZoneDelegate Delegate which performs the parent [ZoneSpec] operation.
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* @param currentZone The current [Zone] where the current interceptor has been declared.
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* @param targetZone The [Zone] which originally received the request.
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* @param task The argument passed into the `scheduleTask` method.
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*/
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onScheduleTask?:
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(parentZoneDelegate: ZoneDelegate, currentZone: Zone, targetZone: Zone, task: Task) => Task;
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onInvokeTask?:
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(parentZoneDelegate: ZoneDelegate, currentZone: Zone, targetZone: Zone, task: Task,
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applyThis: any, applyArgs?: any[]) => any;
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/**
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* Allows interception of task cancellation.
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*
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* @param parentZoneDelegate Delegate which performs the parent [ZoneSpec] operation.
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* @param currentZone The current [Zone] where the current interceptor has been declared.
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* @param targetZone The [Zone] which originally received the request.
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* @param task The argument passed into the `cancelTask` method.
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*/
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onCancelTask?:
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(parentZoneDelegate: ZoneDelegate, currentZone: Zone, targetZone: Zone, task: Task) => any;
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/**
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* Notifies of changes to the task queue empty status.
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*
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* @param parentZoneDelegate Delegate which performs the parent [ZoneSpec] operation.
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* @param currentZone The current [Zone] where the current interceptor has been declared.
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* @param targetZone The [Zone] which originally received the request.
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* @param hasTaskState
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*/
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onHasTask?:
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(parentZoneDelegate: ZoneDelegate, currentZone: Zone, targetZone: Zone,
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hasTaskState: HasTaskState) => void;
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}
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/**
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* A delegate when intercepting zone operations.
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*
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* A ZoneDelegate is needed because a child zone can't simply invoke a method on a parent zone. For
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* example a child zone wrap can't just call parent zone wrap. Doing so would create a callback
|
|
* which is bound to the parent zone. What we are interested in is intercepting the callback before
|
|
* it is bound to any zone. Furthermore, we also need to pass the targetZone (zone which received
|
|
* the original request) to the delegate.
|
|
*
|
|
* The ZoneDelegate methods mirror those of Zone with an addition of extra targetZone argument in
|
|
* the method signature. (The original Zone which received the request.) Some methods are renamed
|
|
* to prevent confusion, because they have slightly different semantics and arguments.
|
|
*
|
|
* - `wrap` => `intercept`: The `wrap` method delegates to `intercept`. The `wrap` method returns
|
|
* a callback which will run in a given zone, where as intercept allows wrapping the callback
|
|
* so that additional code can be run before and after, but does not associate the callback
|
|
* with the zone.
|
|
* - `run` => `invoke`: The `run` method delegates to `invoke` to perform the actual execution of
|
|
* the callback. The `run` method switches to new zone; saves and restores the `Zone.current`;
|
|
* and optionally performs error handling. The invoke is not responsible for error handling,
|
|
* or zone management.
|
|
*
|
|
* Not every method is usually overwritten in the child zone, for this reason the ZoneDelegate
|
|
* stores the closest zone which overwrites this behavior along with the closest ZoneSpec.
|
|
*
|
|
* NOTE: We have tried to make this API analogous to Event bubbling with target and current
|
|
* properties.
|
|
*
|
|
* Note: The ZoneDelegate treats ZoneSpec as class. This allows the ZoneSpec to use its `this` to
|
|
* store internal state.
|
|
*/
|
|
interface ZoneDelegate {
|
|
zone: Zone;
|
|
fork(targetZone: Zone, zoneSpec: ZoneSpec): Zone;
|
|
intercept(targetZone: Zone, callback: Function, source: string): Function;
|
|
invoke(targetZone: Zone, callback: Function, applyThis?: any, applyArgs?: any[], source?: string):
|
|
any;
|
|
handleError(targetZone: Zone, error: any): boolean;
|
|
scheduleTask(targetZone: Zone, task: Task): Task;
|
|
invokeTask(targetZone: Zone, task: Task, applyThis?: any, applyArgs?: any[]): any;
|
|
cancelTask(targetZone: Zone, task: Task): any;
|
|
hasTask(targetZone: Zone, isEmpty: HasTaskState): void;
|
|
}
|
|
|
|
type HasTaskState = {
|
|
microTask: boolean; macroTask: boolean; eventTask: boolean; change: TaskType;
|
|
};
|
|
|
|
/**
|
|
* Task type: `microTask`, `macroTask`, `eventTask`.
|
|
*/
|
|
type TaskType = 'microTask' | 'macroTask' | 'eventTask';
|
|
|
|
/**
|
|
* Task type: `notScheduled`, `scheduling`, `scheduled`, `running`, `canceling`, 'unknown'.
|
|
*/
|
|
type TaskState = 'notScheduled' | 'scheduling' | 'scheduled' | 'running' | 'canceling' | 'unknown';
|
|
|
|
|
|
/**
|
|
*/
|
|
interface TaskData {
|
|
/**
|
|
* A periodic [MacroTask] is such which get automatically rescheduled after it is executed.
|
|
*/
|
|
isPeriodic?: boolean;
|
|
|
|
/**
|
|
* Delay in milliseconds when the Task will run.
|
|
*/
|
|
delay?: number;
|
|
|
|
/**
|
|
* identifier returned by the native setTimeout.
|
|
*/
|
|
handleId?: number;
|
|
}
|
|
|
|
/**
|
|
* Represents work which is executed with a clean stack.
|
|
*
|
|
* Tasks are used in Zones to mark work which is performed on clean stack frame. There are three
|
|
* kinds of task. [MicroTask], [MacroTask], and [EventTask].
|
|
*
|
|
* A JS VM can be modeled as a [MicroTask] queue, [MacroTask] queue, and [EventTask] set.
|
|
*
|
|
* - [MicroTask] queue represents a set of tasks which are executing right after the current stack
|
|
* frame becomes clean and before a VM yield. All [MicroTask]s execute in order of insertion
|
|
* before VM yield and the next [MacroTask] is executed.
|
|
* - [MacroTask] queue represents a set of tasks which are executed one at a time after each VM
|
|
* yield. The queue is ordered by time, and insertions can happen in any location.
|
|
* - [EventTask] is a set of tasks which can at any time be inserted to the end of the [MacroTask]
|
|
* queue. This happens when the event fires.
|
|
*
|
|
*/
|
|
interface Task {
|
|
/**
|
|
* Task type: `microTask`, `macroTask`, `eventTask`.
|
|
*/
|
|
type: TaskType;
|
|
|
|
/**
|
|
* Task state: `notScheduled`, `scheduling`, `scheduled`, `running`, `canceling`, `unknown`.
|
|
*/
|
|
state: TaskState;
|
|
|
|
/**
|
|
* Debug string representing the API which requested the scheduling of the task.
|
|
*/
|
|
source: string;
|
|
|
|
/**
|
|
* The Function to be used by the VM upon entering the [Task]. This function will delegate to
|
|
* [Zone.runTask] and delegate to `callback`.
|
|
*/
|
|
invoke: Function;
|
|
|
|
/**
|
|
* Function which needs to be executed by the Task after the [Zone.currentTask] has been set to
|
|
* the current task.
|
|
*/
|
|
callback: Function;
|
|
|
|
/**
|
|
* Task specific options associated with the current task. This is passed to the `scheduleFn`.
|
|
*/
|
|
data?: TaskData;
|
|
|
|
/**
|
|
* Represents the default work which needs to be done to schedule the Task by the VM.
|
|
*
|
|
* A zone may choose to intercept this function and perform its own scheduling.
|
|
*/
|
|
scheduleFn?: (task: Task) => void;
|
|
|
|
/**
|
|
* Represents the default work which needs to be done to un-schedule the Task from the VM. Not all
|
|
* Tasks are cancelable, and therefore this method is optional.
|
|
*
|
|
* A zone may chose to intercept this function and perform its own un-scheduling.
|
|
*/
|
|
cancelFn?: (task: Task) => void;
|
|
|
|
/**
|
|
* @type {Zone} The zone which will be used to invoke the `callback`. The Zone is captured
|
|
* at the time of Task creation.
|
|
*/
|
|
readonly zone: Zone;
|
|
|
|
/**
|
|
* Number of times the task has been executed, or -1 if canceled.
|
|
*/
|
|
runCount: number;
|
|
|
|
/**
|
|
* Cancel the scheduling request. This method can be called from `ZoneSpec.onScheduleTask` to
|
|
* cancel the current scheduling interception. Once canceled the task can be discarded or
|
|
* rescheduled using `Zone.scheduleTask` on a different zone.
|
|
*/
|
|
cancelScheduleRequest(): void;
|
|
}
|
|
|
|
interface MicroTask extends Task {
|
|
type: 'microTask';
|
|
}
|
|
|
|
interface MacroTask extends Task {
|
|
type: 'macroTask';
|
|
}
|
|
|
|
interface EventTask extends Task {
|
|
type: 'eventTask';
|
|
}
|
|
|
|
/** @internal */
|
|
type AmbientZone = Zone;
|
|
/** @internal */
|
|
type AmbientZoneDelegate = ZoneDelegate;
|
|
|
|
const Zone: ZoneType = (function(global: any) {
|
|
const performance: {mark(name: string): void; measure(name: string, label: string): void;} =
|
|
global['performance'];
|
|
function mark(name: string) { performance && performance['mark'] && performance['mark'](name); }
|
|
function performanceMeasure(name: string, label: string) {
|
|
performance && performance['measure'] && performance['measure'](name, label);
|
|
}
|
|
mark('Zone');
|
|
|
|
// Initialize before it's accessed below.
|
|
// __Zone_symbol_prefix global can be used to override the default zone
|
|
// symbol prefix with a custom one if needed.
|
|
const symbolPrefix = global['__Zone_symbol_prefix'] || '__zone_symbol__';
|
|
|
|
function __symbol__(name: string) { return symbolPrefix + name; }
|
|
|
|
const checkDuplicate = global[__symbol__('forceDuplicateZoneCheck')] === true;
|
|
if (global['Zone']) {
|
|
// if global['Zone'] already exists (maybe zone.js was already loaded or
|
|
// some other lib also registered a global object named Zone), we may need
|
|
// to throw an error, but sometimes user may not want this error.
|
|
// For example,
|
|
// we have two web pages, page1 includes zone.js, page2 doesn't.
|
|
// and the 1st time user load page1 and page2, everything work fine,
|
|
// but when user load page2 again, error occurs because global['Zone'] already exists.
|
|
// so we add a flag to let user choose whether to throw this error or not.
|
|
// By default, if existing Zone is from zone.js, we will not throw the error.
|
|
if (checkDuplicate || typeof global['Zone'].__symbol__ !== 'function') {
|
|
throw new Error('Zone already loaded.');
|
|
} else {
|
|
return global['Zone'];
|
|
}
|
|
}
|
|
|
|
class Zone implements AmbientZone {
|
|
static __symbol__: (name: string) => string = __symbol__;
|
|
|
|
static assertZonePatched() {
|
|
if (global['Promise'] !== patches['ZoneAwarePromise']) {
|
|
throw new Error(
|
|
'Zone.js has detected that ZoneAwarePromise `(window|global).Promise` ' +
|
|
'has been overwritten.\n' +
|
|
'Most likely cause is that a Promise polyfill has been loaded ' +
|
|
'after Zone.js (Polyfilling Promise api is not necessary when zone.js is loaded. ' +
|
|
'If you must load one, do so before loading zone.js.)');
|
|
}
|
|
}
|
|
|
|
static get root(): AmbientZone {
|
|
let zone = Zone.current;
|
|
while (zone.parent) {
|
|
zone = zone.parent;
|
|
}
|
|
return zone;
|
|
}
|
|
|
|
static get current(): AmbientZone { return _currentZoneFrame.zone; }
|
|
|
|
static get currentTask(): Task|null { return _currentTask; }
|
|
|
|
static __load_patch(name: string, fn: _PatchFn): void {
|
|
if (patches.hasOwnProperty(name)) {
|
|
if (checkDuplicate) {
|
|
throw Error('Already loaded patch: ' + name);
|
|
}
|
|
} else if (!global['__Zone_disable_' + name]) {
|
|
const perfName = 'Zone:' + name;
|
|
mark(perfName);
|
|
patches[name] = fn(global, Zone, _api);
|
|
performanceMeasure(perfName, perfName);
|
|
}
|
|
}
|
|
|
|
public get parent(): AmbientZone|null { return this._parent; }
|
|
|
|
public get name(): string { return this._name; }
|
|
|
|
|
|
private _parent: Zone|null;
|
|
private _name: string;
|
|
private _properties: {[key: string]: any};
|
|
private _zoneDelegate: ZoneDelegate;
|
|
|
|
constructor(parent: Zone|null, zoneSpec: ZoneSpec|null) {
|
|
this._parent = parent;
|
|
this._name = zoneSpec ? zoneSpec.name || 'unnamed' : '<root>';
|
|
this._properties = zoneSpec && zoneSpec.properties || {};
|
|
this._zoneDelegate =
|
|
new ZoneDelegate(this, this._parent && this._parent._zoneDelegate, zoneSpec);
|
|
}
|
|
|
|
public get(key: string): any {
|
|
const zone: Zone = this.getZoneWith(key) as Zone;
|
|
if (zone) return zone._properties[key];
|
|
}
|
|
|
|
public getZoneWith(key: string): AmbientZone|null {
|
|
let current: Zone|null = this;
|
|
while (current) {
|
|
if (current._properties.hasOwnProperty(key)) {
|
|
return current;
|
|
}
|
|
current = current._parent;
|
|
}
|
|
return null;
|
|
}
|
|
|
|
public fork(zoneSpec: ZoneSpec): AmbientZone {
|
|
if (!zoneSpec) throw new Error('ZoneSpec required!');
|
|
return this._zoneDelegate.fork(this, zoneSpec);
|
|
}
|
|
|
|
public wrap<T extends Function>(callback: T, source: string): T {
|
|
if (typeof callback !== 'function') {
|
|
throw new Error('Expecting function got: ' + callback);
|
|
}
|
|
const _callback = this._zoneDelegate.intercept(this, callback, source);
|
|
const zone: Zone = this;
|
|
return function() {
|
|
return zone.runGuarded(_callback, (this as any), <any>arguments, source);
|
|
} as any as T;
|
|
}
|
|
|
|
public run(callback: Function, applyThis?: any, applyArgs?: any[], source?: string): any;
|
|
public run<T>(
|
|
callback: (...args: any[]) => T, applyThis?: any, applyArgs?: any[], source?: string): T {
|
|
_currentZoneFrame = {parent: _currentZoneFrame, zone: this};
|
|
try {
|
|
return this._zoneDelegate.invoke(this, callback, applyThis, applyArgs, source);
|
|
} finally {
|
|
_currentZoneFrame = _currentZoneFrame.parent !;
|
|
}
|
|
}
|
|
|
|
public runGuarded(callback: Function, applyThis?: any, applyArgs?: any[], source?: string): any;
|
|
public runGuarded<T>(
|
|
callback: (...args: any[]) => T, applyThis: any = null, applyArgs?: any[],
|
|
source?: string) {
|
|
_currentZoneFrame = {parent: _currentZoneFrame, zone: this};
|
|
try {
|
|
try {
|
|
return this._zoneDelegate.invoke(this, callback, applyThis, applyArgs, source);
|
|
} catch (error) {
|
|
if (this._zoneDelegate.handleError(this, error)) {
|
|
throw error;
|
|
}
|
|
}
|
|
} finally {
|
|
_currentZoneFrame = _currentZoneFrame.parent !;
|
|
}
|
|
}
|
|
|
|
|
|
runTask(task: Task, applyThis?: any, applyArgs?: any): any {
|
|
if (task.zone != this) {
|
|
throw new Error(
|
|
'A task can only be run in the zone of creation! (Creation: ' +
|
|
(task.zone || NO_ZONE).name + '; Execution: ' + this.name + ')');
|
|
}
|
|
// https://github.com/angular/zone.js/issues/778, sometimes eventTask
|
|
// will run in notScheduled(canceled) state, we should not try to
|
|
// run such kind of task but just return
|
|
|
|
if (task.state === notScheduled && (task.type === eventTask || task.type === macroTask)) {
|
|
return;
|
|
}
|
|
|
|
const reEntryGuard = task.state != running;
|
|
reEntryGuard && (task as ZoneTask<any>)._transitionTo(running, scheduled);
|
|
task.runCount++;
|
|
const previousTask = _currentTask;
|
|
_currentTask = task;
|
|
_currentZoneFrame = {parent: _currentZoneFrame, zone: this};
|
|
try {
|
|
if (task.type == macroTask && task.data && !task.data.isPeriodic) {
|
|
task.cancelFn = undefined;
|
|
}
|
|
try {
|
|
return this._zoneDelegate.invokeTask(this, task, applyThis, applyArgs);
|
|
} catch (error) {
|
|
if (this._zoneDelegate.handleError(this, error)) {
|
|
throw error;
|
|
}
|
|
}
|
|
} finally {
|
|
// if the task's state is notScheduled or unknown, then it has already been cancelled
|
|
// we should not reset the state to scheduled
|
|
if (task.state !== notScheduled && task.state !== unknown) {
|
|
if (task.type == eventTask || (task.data && task.data.isPeriodic)) {
|
|
reEntryGuard && (task as ZoneTask<any>)._transitionTo(scheduled, running);
|
|
} else {
|
|
task.runCount = 0;
|
|
this._updateTaskCount(task as ZoneTask<any>, -1);
|
|
reEntryGuard &&
|
|
(task as ZoneTask<any>)._transitionTo(notScheduled, running, notScheduled);
|
|
}
|
|
}
|
|
_currentZoneFrame = _currentZoneFrame.parent !;
|
|
_currentTask = previousTask;
|
|
}
|
|
}
|
|
|
|
scheduleTask<T extends Task>(task: T): T {
|
|
if (task.zone && task.zone !== this) {
|
|
// check if the task was rescheduled, the newZone
|
|
// should not be the children of the original zone
|
|
let newZone: any = this;
|
|
while (newZone) {
|
|
if (newZone === task.zone) {
|
|
throw Error(`can not reschedule task to ${
|
|
this.name} which is descendants of the original zone ${task.zone.name}`);
|
|
}
|
|
newZone = newZone.parent;
|
|
}
|
|
}
|
|
(task as any as ZoneTask<any>)._transitionTo(scheduling, notScheduled);
|
|
const zoneDelegates: ZoneDelegate[] = [];
|
|
(task as any as ZoneTask<any>)._zoneDelegates = zoneDelegates;
|
|
(task as any as ZoneTask<any>)._zone = this;
|
|
try {
|
|
task = this._zoneDelegate.scheduleTask(this, task) as T;
|
|
} catch (err) {
|
|
// should set task's state to unknown when scheduleTask throw error
|
|
// because the err may from reschedule, so the fromState maybe notScheduled
|
|
(task as any as ZoneTask<any>)._transitionTo(unknown, scheduling, notScheduled);
|
|
// TODO: @JiaLiPassion, should we check the result from handleError?
|
|
this._zoneDelegate.handleError(this, err);
|
|
throw err;
|
|
}
|
|
if ((task as any as ZoneTask<any>)._zoneDelegates === zoneDelegates) {
|
|
// we have to check because internally the delegate can reschedule the task.
|
|
this._updateTaskCount(task as any as ZoneTask<any>, 1);
|
|
}
|
|
if ((task as any as ZoneTask<any>).state == scheduling) {
|
|
(task as any as ZoneTask<any>)._transitionTo(scheduled, scheduling);
|
|
}
|
|
return task;
|
|
}
|
|
|
|
scheduleMicroTask(
|
|
source: string, callback: Function, data?: TaskData,
|
|
customSchedule?: (task: Task) => void): MicroTask {
|
|
return this.scheduleTask(
|
|
new ZoneTask(microTask, source, callback, data, customSchedule, undefined));
|
|
}
|
|
|
|
scheduleMacroTask(
|
|
source: string, callback: Function, data?: TaskData, customSchedule?: (task: Task) => void,
|
|
customCancel?: (task: Task) => void): MacroTask {
|
|
return this.scheduleTask(
|
|
new ZoneTask(macroTask, source, callback, data, customSchedule, customCancel));
|
|
}
|
|
|
|
scheduleEventTask(
|
|
source: string, callback: Function, data?: TaskData, customSchedule?: (task: Task) => void,
|
|
customCancel?: (task: Task) => void): EventTask {
|
|
return this.scheduleTask(
|
|
new ZoneTask(eventTask, source, callback, data, customSchedule, customCancel));
|
|
}
|
|
|
|
cancelTask(task: Task): any {
|
|
if (task.zone != this)
|
|
throw new Error(
|
|
'A task can only be cancelled in the zone of creation! (Creation: ' +
|
|
(task.zone || NO_ZONE).name + '; Execution: ' + this.name + ')');
|
|
(task as ZoneTask<any>)._transitionTo(canceling, scheduled, running);
|
|
try {
|
|
this._zoneDelegate.cancelTask(this, task);
|
|
} catch (err) {
|
|
// if error occurs when cancelTask, transit the state to unknown
|
|
(task as ZoneTask<any>)._transitionTo(unknown, canceling);
|
|
this._zoneDelegate.handleError(this, err);
|
|
throw err;
|
|
}
|
|
this._updateTaskCount(task as ZoneTask<any>, -1);
|
|
(task as ZoneTask<any>)._transitionTo(notScheduled, canceling);
|
|
task.runCount = 0;
|
|
return task;
|
|
}
|
|
|
|
private _updateTaskCount(task: ZoneTask<any>, count: number) {
|
|
const zoneDelegates = task._zoneDelegates !;
|
|
if (count == -1) {
|
|
task._zoneDelegates = null;
|
|
}
|
|
for (let i = 0; i < zoneDelegates.length; i++) {
|
|
zoneDelegates[i]._updateTaskCount(task.type, count);
|
|
}
|
|
}
|
|
}
|
|
|
|
const DELEGATE_ZS: ZoneSpec = {
|
|
name: '',
|
|
onHasTask: (delegate: AmbientZoneDelegate, _: AmbientZone, target: AmbientZone,
|
|
hasTaskState: HasTaskState): void => delegate.hasTask(target, hasTaskState),
|
|
onScheduleTask: (delegate: AmbientZoneDelegate, _: AmbientZone, target: AmbientZone,
|
|
task: Task): Task => delegate.scheduleTask(target, task),
|
|
onInvokeTask: (delegate: AmbientZoneDelegate, _: AmbientZone, target: AmbientZone, task: Task,
|
|
applyThis: any, applyArgs: any): any =>
|
|
delegate.invokeTask(target, task, applyThis, applyArgs),
|
|
onCancelTask: (delegate: AmbientZoneDelegate, _: AmbientZone, target: AmbientZone, task: Task):
|
|
any => delegate.cancelTask(target, task)
|
|
};
|
|
|
|
class ZoneDelegate implements AmbientZoneDelegate {
|
|
public zone: Zone;
|
|
|
|
private _taskCounts: {microTask: number,
|
|
macroTask: number,
|
|
eventTask: number} = {'microTask': 0, 'macroTask': 0, 'eventTask': 0};
|
|
|
|
private _parentDelegate: ZoneDelegate|null;
|
|
|
|
private _forkDlgt: ZoneDelegate|null;
|
|
private _forkZS: ZoneSpec|null;
|
|
private _forkCurrZone: Zone|null;
|
|
|
|
private _interceptDlgt: ZoneDelegate|null;
|
|
private _interceptZS: ZoneSpec|null;
|
|
private _interceptCurrZone: Zone|null;
|
|
|
|
private _invokeDlgt: ZoneDelegate|null;
|
|
private _invokeZS: ZoneSpec|null;
|
|
private _invokeCurrZone: Zone|null;
|
|
|
|
private _handleErrorDlgt: ZoneDelegate|null;
|
|
private _handleErrorZS: ZoneSpec|null;
|
|
private _handleErrorCurrZone: Zone|null;
|
|
|
|
private _scheduleTaskDlgt: ZoneDelegate|null;
|
|
private _scheduleTaskZS: ZoneSpec|null;
|
|
private _scheduleTaskCurrZone: Zone|null;
|
|
|
|
private _invokeTaskDlgt: ZoneDelegate|null;
|
|
private _invokeTaskZS: ZoneSpec|null;
|
|
private _invokeTaskCurrZone: Zone|null;
|
|
|
|
private _cancelTaskDlgt: ZoneDelegate|null;
|
|
private _cancelTaskZS: ZoneSpec|null;
|
|
private _cancelTaskCurrZone: Zone|null;
|
|
|
|
private _hasTaskDlgt: ZoneDelegate|null;
|
|
private _hasTaskDlgtOwner: ZoneDelegate|null;
|
|
private _hasTaskZS: ZoneSpec|null;
|
|
private _hasTaskCurrZone: Zone|null;
|
|
|
|
constructor(zone: Zone, parentDelegate: ZoneDelegate|null, zoneSpec: ZoneSpec|null) {
|
|
this.zone = zone;
|
|
this._parentDelegate = parentDelegate;
|
|
|
|
this._forkZS =
|
|
zoneSpec && (zoneSpec && zoneSpec.onFork ? zoneSpec : parentDelegate !._forkZS);
|
|
this._forkDlgt = zoneSpec && (zoneSpec.onFork ? parentDelegate : parentDelegate !._forkDlgt);
|
|
this._forkCurrZone = zoneSpec && (zoneSpec.onFork ? this.zone : parentDelegate !.zone);
|
|
|
|
this._interceptZS =
|
|
zoneSpec && (zoneSpec.onIntercept ? zoneSpec : parentDelegate !._interceptZS);
|
|
this._interceptDlgt =
|
|
zoneSpec && (zoneSpec.onIntercept ? parentDelegate : parentDelegate !._interceptDlgt);
|
|
this._interceptCurrZone =
|
|
zoneSpec && (zoneSpec.onIntercept ? this.zone : parentDelegate !.zone);
|
|
|
|
this._invokeZS = zoneSpec && (zoneSpec.onInvoke ? zoneSpec : parentDelegate !._invokeZS);
|
|
this._invokeDlgt =
|
|
zoneSpec && (zoneSpec.onInvoke ? parentDelegate ! : parentDelegate !._invokeDlgt);
|
|
this._invokeCurrZone = zoneSpec && (zoneSpec.onInvoke ? this.zone : parentDelegate !.zone);
|
|
|
|
this._handleErrorZS =
|
|
zoneSpec && (zoneSpec.onHandleError ? zoneSpec : parentDelegate !._handleErrorZS);
|
|
this._handleErrorDlgt = zoneSpec &&
|
|
(zoneSpec.onHandleError ? parentDelegate ! : parentDelegate !._handleErrorDlgt);
|
|
this._handleErrorCurrZone =
|
|
zoneSpec && (zoneSpec.onHandleError ? this.zone : parentDelegate !.zone);
|
|
|
|
this._scheduleTaskZS =
|
|
zoneSpec && (zoneSpec.onScheduleTask ? zoneSpec : parentDelegate !._scheduleTaskZS);
|
|
this._scheduleTaskDlgt = zoneSpec &&
|
|
(zoneSpec.onScheduleTask ? parentDelegate ! : parentDelegate !._scheduleTaskDlgt);
|
|
this._scheduleTaskCurrZone =
|
|
zoneSpec && (zoneSpec.onScheduleTask ? this.zone : parentDelegate !.zone);
|
|
|
|
this._invokeTaskZS =
|
|
zoneSpec && (zoneSpec.onInvokeTask ? zoneSpec : parentDelegate !._invokeTaskZS);
|
|
this._invokeTaskDlgt =
|
|
zoneSpec && (zoneSpec.onInvokeTask ? parentDelegate ! : parentDelegate !._invokeTaskDlgt);
|
|
this._invokeTaskCurrZone =
|
|
zoneSpec && (zoneSpec.onInvokeTask ? this.zone : parentDelegate !.zone);
|
|
|
|
this._cancelTaskZS =
|
|
zoneSpec && (zoneSpec.onCancelTask ? zoneSpec : parentDelegate !._cancelTaskZS);
|
|
this._cancelTaskDlgt =
|
|
zoneSpec && (zoneSpec.onCancelTask ? parentDelegate ! : parentDelegate !._cancelTaskDlgt);
|
|
this._cancelTaskCurrZone =
|
|
zoneSpec && (zoneSpec.onCancelTask ? this.zone : parentDelegate !.zone);
|
|
|
|
this._hasTaskZS = null;
|
|
this._hasTaskDlgt = null;
|
|
this._hasTaskDlgtOwner = null;
|
|
this._hasTaskCurrZone = null;
|
|
|
|
const zoneSpecHasTask = zoneSpec && zoneSpec.onHasTask;
|
|
const parentHasTask = parentDelegate && parentDelegate._hasTaskZS;
|
|
if (zoneSpecHasTask || parentHasTask) {
|
|
// If we need to report hasTask, than this ZS needs to do ref counting on tasks. In such
|
|
// a case all task related interceptors must go through this ZD. We can't short circuit it.
|
|
this._hasTaskZS = zoneSpecHasTask ? zoneSpec : DELEGATE_ZS;
|
|
this._hasTaskDlgt = parentDelegate;
|
|
this._hasTaskDlgtOwner = this;
|
|
this._hasTaskCurrZone = zone;
|
|
if (!zoneSpec !.onScheduleTask) {
|
|
this._scheduleTaskZS = DELEGATE_ZS;
|
|
this._scheduleTaskDlgt = parentDelegate !;
|
|
this._scheduleTaskCurrZone = this.zone;
|
|
}
|
|
if (!zoneSpec !.onInvokeTask) {
|
|
this._invokeTaskZS = DELEGATE_ZS;
|
|
this._invokeTaskDlgt = parentDelegate !;
|
|
this._invokeTaskCurrZone = this.zone;
|
|
}
|
|
if (!zoneSpec !.onCancelTask) {
|
|
this._cancelTaskZS = DELEGATE_ZS;
|
|
this._cancelTaskDlgt = parentDelegate !;
|
|
this._cancelTaskCurrZone = this.zone;
|
|
}
|
|
}
|
|
}
|
|
|
|
fork(targetZone: Zone, zoneSpec: ZoneSpec): AmbientZone {
|
|
return this._forkZS ?
|
|
this._forkZS.onFork !(this._forkDlgt !, this.zone, targetZone, zoneSpec) :
|
|
new Zone(targetZone, zoneSpec);
|
|
}
|
|
|
|
intercept(targetZone: Zone, callback: Function, source: string): Function {
|
|
return this._interceptZS ?
|
|
this._interceptZS.onIntercept !(
|
|
this._interceptDlgt !, this._interceptCurrZone !, targetZone, callback, source) :
|
|
callback;
|
|
}
|
|
|
|
invoke(
|
|
targetZone: Zone, callback: Function, applyThis: any, applyArgs?: any[],
|
|
source?: string): any {
|
|
return this._invokeZS ?
|
|
this._invokeZS.onInvoke !(
|
|
this._invokeDlgt !, this._invokeCurrZone !, targetZone, callback, applyThis,
|
|
applyArgs, source) :
|
|
callback.apply(applyThis, applyArgs);
|
|
}
|
|
|
|
handleError(targetZone: Zone, error: any): boolean {
|
|
return this._handleErrorZS ?
|
|
this._handleErrorZS.onHandleError !(
|
|
this._handleErrorDlgt !, this._handleErrorCurrZone !, targetZone, error) :
|
|
true;
|
|
}
|
|
|
|
scheduleTask(targetZone: Zone, task: Task): Task {
|
|
let returnTask: ZoneTask<any> = task as ZoneTask<any>;
|
|
if (this._scheduleTaskZS) {
|
|
if (this._hasTaskZS) {
|
|
returnTask._zoneDelegates !.push(this._hasTaskDlgtOwner !);
|
|
}
|
|
// clang-format off
|
|
returnTask = this._scheduleTaskZS.onScheduleTask !(
|
|
this._scheduleTaskDlgt !, this._scheduleTaskCurrZone !, targetZone, task) as ZoneTask<any>;
|
|
// clang-format on
|
|
if (!returnTask) returnTask = task as ZoneTask<any>;
|
|
} else {
|
|
if (task.scheduleFn) {
|
|
task.scheduleFn(task);
|
|
} else if (task.type == microTask) {
|
|
scheduleMicroTask(<MicroTask>task);
|
|
} else {
|
|
throw new Error('Task is missing scheduleFn.');
|
|
}
|
|
}
|
|
return returnTask;
|
|
}
|
|
|
|
invokeTask(targetZone: Zone, task: Task, applyThis: any, applyArgs?: any[]): any {
|
|
return this._invokeTaskZS ?
|
|
this._invokeTaskZS.onInvokeTask !(
|
|
this._invokeTaskDlgt !, this._invokeTaskCurrZone !, targetZone, task, applyThis,
|
|
applyArgs) :
|
|
task.callback.apply(applyThis, applyArgs);
|
|
}
|
|
|
|
cancelTask(targetZone: Zone, task: Task): any {
|
|
let value: any;
|
|
if (this._cancelTaskZS) {
|
|
value = this._cancelTaskZS.onCancelTask !(
|
|
this._cancelTaskDlgt !, this._cancelTaskCurrZone !, targetZone, task);
|
|
} else {
|
|
if (!task.cancelFn) {
|
|
throw Error('Task is not cancelable');
|
|
}
|
|
value = task.cancelFn(task);
|
|
}
|
|
return value;
|
|
}
|
|
|
|
hasTask(targetZone: Zone, isEmpty: HasTaskState) {
|
|
// hasTask should not throw error so other ZoneDelegate
|
|
// can still trigger hasTask callback
|
|
try {
|
|
this._hasTaskZS &&
|
|
this._hasTaskZS.onHasTask !(
|
|
this._hasTaskDlgt !, this._hasTaskCurrZone !, targetZone, isEmpty);
|
|
} catch (err) {
|
|
this.handleError(targetZone, err);
|
|
}
|
|
}
|
|
|
|
_updateTaskCount(type: TaskType, count: number) {
|
|
const counts = this._taskCounts;
|
|
const prev = counts[type];
|
|
const next = counts[type] = prev + count;
|
|
if (next < 0) {
|
|
throw new Error('More tasks executed then were scheduled.');
|
|
}
|
|
if (prev == 0 || next == 0) {
|
|
const isEmpty: HasTaskState = {
|
|
microTask: counts['microTask'] > 0,
|
|
macroTask: counts['macroTask'] > 0,
|
|
eventTask: counts['eventTask'] > 0,
|
|
change: type
|
|
};
|
|
this.hasTask(this.zone, isEmpty);
|
|
}
|
|
}
|
|
}
|
|
|
|
class ZoneTask<T extends TaskType> implements Task {
|
|
public type: T;
|
|
public source: string;
|
|
public invoke: Function;
|
|
public callback: Function;
|
|
public data: TaskData|undefined;
|
|
public scheduleFn: ((task: Task) => void)|undefined;
|
|
public cancelFn: ((task: Task) => void)|undefined;
|
|
_zone: Zone|null = null;
|
|
public runCount: number = 0;
|
|
_zoneDelegates: ZoneDelegate[]|null = null;
|
|
_state: TaskState = 'notScheduled';
|
|
|
|
constructor(
|
|
type: T, source: string, callback: Function, options: TaskData|undefined,
|
|
scheduleFn: ((task: Task) => void)|undefined, cancelFn: ((task: Task) => void)|undefined) {
|
|
this.type = type;
|
|
this.source = source;
|
|
this.data = options;
|
|
this.scheduleFn = scheduleFn;
|
|
this.cancelFn = cancelFn;
|
|
if (!callback) {
|
|
throw new Error('callback is not defined');
|
|
}
|
|
this.callback = callback;
|
|
const self = this;
|
|
// TODO: @JiaLiPassion options should have interface
|
|
if (type === eventTask && options && (options as any).useG) {
|
|
this.invoke = ZoneTask.invokeTask;
|
|
} else {
|
|
this.invoke = function() {
|
|
return ZoneTask.invokeTask.call(global, self, this, <any>arguments);
|
|
};
|
|
}
|
|
}
|
|
|
|
static invokeTask(task: any, target: any, args: any): any {
|
|
if (!task) {
|
|
task = this;
|
|
}
|
|
_numberOfNestedTaskFrames++;
|
|
try {
|
|
task.runCount++;
|
|
return task.zone.runTask(task, target, args);
|
|
} finally {
|
|
if (_numberOfNestedTaskFrames == 1) {
|
|
drainMicroTaskQueue();
|
|
}
|
|
_numberOfNestedTaskFrames--;
|
|
}
|
|
}
|
|
|
|
get zone(): Zone { return this._zone !; }
|
|
|
|
get state(): TaskState { return this._state; }
|
|
|
|
public cancelScheduleRequest() { this._transitionTo(notScheduled, scheduling); }
|
|
|
|
_transitionTo(toState: TaskState, fromState1: TaskState, fromState2?: TaskState) {
|
|
if (this._state === fromState1 || this._state === fromState2) {
|
|
this._state = toState;
|
|
if (toState == notScheduled) {
|
|
this._zoneDelegates = null;
|
|
}
|
|
} else {
|
|
throw new Error(`${this.type} '${this.source}': can not transition to '${
|
|
toState}', expecting state '${fromState1}'${
|
|
fromState2 ? ' or \'' + fromState2 + '\'' : ''}, was '${this._state}'.`);
|
|
}
|
|
}
|
|
|
|
public toString() {
|
|
if (this.data && typeof this.data.handleId !== 'undefined') {
|
|
return this.data.handleId.toString();
|
|
} else {
|
|
return Object.prototype.toString.call(this);
|
|
}
|
|
}
|
|
|
|
// add toJSON method to prevent cyclic error when
|
|
// call JSON.stringify(zoneTask)
|
|
public toJSON() {
|
|
return {
|
|
type: this.type,
|
|
state: this.state,
|
|
source: this.source,
|
|
zone: this.zone.name,
|
|
runCount: this.runCount
|
|
};
|
|
}
|
|
}
|
|
|
|
|
|
//////////////////////////////////////////////////////
|
|
//////////////////////////////////////////////////////
|
|
/// MICROTASK QUEUE
|
|
//////////////////////////////////////////////////////
|
|
//////////////////////////////////////////////////////
|
|
const symbolSetTimeout = __symbol__('setTimeout');
|
|
const symbolPromise = __symbol__('Promise');
|
|
const symbolThen = __symbol__('then');
|
|
let _microTaskQueue: Task[] = [];
|
|
let _isDrainingMicrotaskQueue: boolean = false;
|
|
let nativeMicroTaskQueuePromise: any;
|
|
|
|
function scheduleMicroTask(task?: MicroTask) {
|
|
// if we are not running in any task, and there has not been anything scheduled
|
|
// we must bootstrap the initial task creation by manually scheduling the drain
|
|
if (_numberOfNestedTaskFrames === 0 && _microTaskQueue.length === 0) {
|
|
// We are not running in Task, so we need to kickstart the microtask queue.
|
|
if (!nativeMicroTaskQueuePromise) {
|
|
if (global[symbolPromise]) {
|
|
nativeMicroTaskQueuePromise = global[symbolPromise].resolve(0);
|
|
}
|
|
}
|
|
if (nativeMicroTaskQueuePromise) {
|
|
let nativeThen = nativeMicroTaskQueuePromise[symbolThen];
|
|
if (!nativeThen) {
|
|
// native Promise is not patchable, we need to use `then` directly
|
|
// issue 1078
|
|
nativeThen = nativeMicroTaskQueuePromise['then'];
|
|
}
|
|
nativeThen.call(nativeMicroTaskQueuePromise, drainMicroTaskQueue);
|
|
} else {
|
|
global[symbolSetTimeout](drainMicroTaskQueue, 0);
|
|
}
|
|
}
|
|
task && _microTaskQueue.push(task);
|
|
}
|
|
|
|
function drainMicroTaskQueue() {
|
|
if (!_isDrainingMicrotaskQueue) {
|
|
_isDrainingMicrotaskQueue = true;
|
|
while (_microTaskQueue.length) {
|
|
const queue = _microTaskQueue;
|
|
_microTaskQueue = [];
|
|
for (let i = 0; i < queue.length; i++) {
|
|
const task = queue[i];
|
|
try {
|
|
task.zone.runTask(task, null, null);
|
|
} catch (error) {
|
|
_api.onUnhandledError(error);
|
|
}
|
|
}
|
|
}
|
|
_api.microtaskDrainDone();
|
|
_isDrainingMicrotaskQueue = false;
|
|
}
|
|
}
|
|
|
|
//////////////////////////////////////////////////////
|
|
//////////////////////////////////////////////////////
|
|
/// BOOTSTRAP
|
|
//////////////////////////////////////////////////////
|
|
//////////////////////////////////////////////////////
|
|
|
|
|
|
const NO_ZONE = {name: 'NO ZONE'};
|
|
const notScheduled: 'notScheduled' = 'notScheduled', scheduling: 'scheduling' = 'scheduling',
|
|
scheduled: 'scheduled' = 'scheduled', running: 'running' = 'running',
|
|
canceling: 'canceling' = 'canceling', unknown: 'unknown' = 'unknown';
|
|
const microTask: 'microTask' = 'microTask', macroTask: 'macroTask' = 'macroTask',
|
|
eventTask: 'eventTask' = 'eventTask';
|
|
|
|
const patches: {[key: string]: any} = {};
|
|
const _api: _ZonePrivate = {
|
|
symbol: __symbol__,
|
|
currentZoneFrame: () => _currentZoneFrame,
|
|
onUnhandledError: noop,
|
|
microtaskDrainDone: noop,
|
|
scheduleMicroTask: scheduleMicroTask,
|
|
showUncaughtError: () => !(Zone as any)[__symbol__('ignoreConsoleErrorUncaughtError')],
|
|
patchEventTarget: () => [],
|
|
patchOnProperties: noop,
|
|
patchMethod: () => noop,
|
|
bindArguments: () => [],
|
|
patchThen: () => noop,
|
|
patchMacroTask: () => noop,
|
|
setNativePromise: (NativePromise: any) => {
|
|
// sometimes NativePromise.resolve static function
|
|
// is not ready yet, (such as core-js/es6.promise)
|
|
// so we need to check here.
|
|
if (NativePromise && typeof NativePromise.resolve === 'function') {
|
|
nativeMicroTaskQueuePromise = NativePromise.resolve(0);
|
|
}
|
|
},
|
|
patchEventPrototype: () => noop,
|
|
isIEOrEdge: () => false,
|
|
getGlobalObjects: () => undefined,
|
|
ObjectDefineProperty: () => noop,
|
|
ObjectGetOwnPropertyDescriptor: () => undefined,
|
|
ObjectCreate: () => undefined,
|
|
ArraySlice: () => [],
|
|
patchClass: () => noop,
|
|
wrapWithCurrentZone: () => noop,
|
|
filterProperties: () => [],
|
|
attachOriginToPatched: () => noop,
|
|
_redefineProperty: () => noop,
|
|
patchCallbacks: () => noop
|
|
};
|
|
let _currentZoneFrame: _ZoneFrame = {parent: null, zone: new Zone(null, null)};
|
|
let _currentTask: Task|null = null;
|
|
let _numberOfNestedTaskFrames = 0;
|
|
|
|
function noop() {}
|
|
|
|
performanceMeasure('Zone', 'Zone');
|
|
return global['Zone'] = Zone;
|
|
})(typeof window !== 'undefined' && window || typeof self !== 'undefined' && self || global);
|