angular-cn/packages/zone.js/lib/zone-spec/proxy.ts

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/**
* @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
*/
class ProxyZoneSpec implements ZoneSpec {
name: string = 'ProxyZone';
private _delegateSpec: ZoneSpec|null = null;
properties: {[k: string]: any} = {'ProxyZoneSpec': this};
propertyKeys: string[]|null = null;
lastTaskState: HasTaskState|null = null;
isNeedToTriggerHasTask = false;
private tasks: Task[] = [];
static get(): ProxyZoneSpec { return Zone.current.get('ProxyZoneSpec'); }
static isLoaded(): boolean { return ProxyZoneSpec.get() instanceof ProxyZoneSpec; }
static assertPresent(): ProxyZoneSpec {
if (!ProxyZoneSpec.isLoaded()) {
throw new Error(`Expected to be running in 'ProxyZone', but it was not found.`);
}
return ProxyZoneSpec.get();
}
constructor(private defaultSpecDelegate: ZoneSpec|null = null) {
this.setDelegate(defaultSpecDelegate);
}
setDelegate(delegateSpec: ZoneSpec|null) {
const isNewDelegate = this._delegateSpec !== delegateSpec;
this._delegateSpec = delegateSpec;
this.propertyKeys && this.propertyKeys.forEach((key) => delete this.properties[key]);
this.propertyKeys = null;
if (delegateSpec && delegateSpec.properties) {
this.propertyKeys = Object.keys(delegateSpec.properties);
this.propertyKeys.forEach((k) => this.properties[k] = delegateSpec.properties ![k]);
}
// if set a new delegateSpec, shoulde check whether need to
// trigger hasTask or not
if (isNewDelegate && this.lastTaskState &&
(this.lastTaskState.macroTask || this.lastTaskState.microTask)) {
this.isNeedToTriggerHasTask = true;
}
}
getDelegate() { return this._delegateSpec; }
resetDelegate() {
const delegateSpec = this.getDelegate();
this.setDelegate(this.defaultSpecDelegate);
}
tryTriggerHasTask(parentZoneDelegate: ZoneDelegate, currentZone: Zone, targetZone: Zone) {
if (this.isNeedToTriggerHasTask && this.lastTaskState) {
// last delegateSpec has microTask or macroTask
// should call onHasTask in current delegateSpec
this.isNeedToTriggerHasTask = false;
this.onHasTask(parentZoneDelegate, currentZone, targetZone, this.lastTaskState);
}
}
removeFromTasks(task: Task) {
if (!this.tasks) {
return;
}
for (let i = 0; i < this.tasks.length; i++) {
if (this.tasks[i] === task) {
this.tasks.splice(i, 1);
return;
}
}
}
getAndClearPendingTasksInfo() {
if (this.tasks.length === 0) {
return '';
}
const taskInfo = this.tasks.map((task: Task) => {
const dataInfo = task.data &&
Object.keys(task.data)
.map((key: string) => { return key + ':' + (task.data as any)[key]; })
.join(',');
return `type: ${task.type}, source: ${task.source}, args: {${dataInfo}}`;
});
const pendingTasksInfo = '--Pendng async tasks are: [' + taskInfo + ']';
// clear tasks
this.tasks = [];
return pendingTasksInfo;
}
onFork(parentZoneDelegate: ZoneDelegate, currentZone: Zone, targetZone: Zone, zoneSpec: ZoneSpec):
Zone {
if (this._delegateSpec && this._delegateSpec.onFork) {
return this._delegateSpec.onFork(parentZoneDelegate, currentZone, targetZone, zoneSpec);
} else {
return parentZoneDelegate.fork(targetZone, zoneSpec);
}
}
onIntercept(
parentZoneDelegate: ZoneDelegate, currentZone: Zone, targetZone: Zone, delegate: Function,
source: string): Function {
if (this._delegateSpec && this._delegateSpec.onIntercept) {
return this._delegateSpec.onIntercept(
parentZoneDelegate, currentZone, targetZone, delegate, source);
} else {
return parentZoneDelegate.intercept(targetZone, delegate, source);
}
}
onInvoke(
parentZoneDelegate: ZoneDelegate, currentZone: Zone, targetZone: Zone, delegate: Function,
applyThis: any, applyArgs?: any[], source?: string): any {
this.tryTriggerHasTask(parentZoneDelegate, currentZone, targetZone);
if (this._delegateSpec && this._delegateSpec.onInvoke) {
return this._delegateSpec.onInvoke(
parentZoneDelegate, currentZone, targetZone, delegate, applyThis, applyArgs, source);
} else {
return parentZoneDelegate.invoke(targetZone, delegate, applyThis, applyArgs, source);
}
}
onHandleError(parentZoneDelegate: ZoneDelegate, currentZone: Zone, targetZone: Zone, error: any):
boolean {
if (this._delegateSpec && this._delegateSpec.onHandleError) {
return this._delegateSpec.onHandleError(parentZoneDelegate, currentZone, targetZone, error);
} else {
return parentZoneDelegate.handleError(targetZone, error);
}
}
onScheduleTask(parentZoneDelegate: ZoneDelegate, currentZone: Zone, targetZone: Zone, task: Task):
Task {
if (task.type !== 'eventTask') {
this.tasks.push(task);
}
if (this._delegateSpec && this._delegateSpec.onScheduleTask) {
return this._delegateSpec.onScheduleTask(parentZoneDelegate, currentZone, targetZone, task);
} else {
return parentZoneDelegate.scheduleTask(targetZone, task);
}
}
onInvokeTask(
parentZoneDelegate: ZoneDelegate, currentZone: Zone, targetZone: Zone, task: Task,
applyThis: any, applyArgs: any): any {
if (task.type !== 'eventTask') {
this.removeFromTasks(task);
}
this.tryTriggerHasTask(parentZoneDelegate, currentZone, targetZone);
if (this._delegateSpec && this._delegateSpec.onInvokeTask) {
return this._delegateSpec.onInvokeTask(
parentZoneDelegate, currentZone, targetZone, task, applyThis, applyArgs);
} else {
return parentZoneDelegate.invokeTask(targetZone, task, applyThis, applyArgs);
}
}
onCancelTask(parentZoneDelegate: ZoneDelegate, currentZone: Zone, targetZone: Zone, task: Task):
any {
if (task.type !== 'eventTask') {
this.removeFromTasks(task);
}
this.tryTriggerHasTask(parentZoneDelegate, currentZone, targetZone);
if (this._delegateSpec && this._delegateSpec.onCancelTask) {
return this._delegateSpec.onCancelTask(parentZoneDelegate, currentZone, targetZone, task);
} else {
return parentZoneDelegate.cancelTask(targetZone, task);
}
}
onHasTask(delegate: ZoneDelegate, current: Zone, target: Zone, hasTaskState: HasTaskState): void {
this.lastTaskState = hasTaskState;
if (this._delegateSpec && this._delegateSpec.onHasTask) {
this._delegateSpec.onHasTask(delegate, current, target, hasTaskState);
} else {
delegate.hasTask(target, hasTaskState);
}
}
}
// Export the class so that new instances can be created with proper
// constructor params.
(Zone as any)['ProxyZoneSpec'] = ProxyZoneSpec;