92 lines
3.1 KiB
TypeScript
92 lines
3.1 KiB
TypeScript
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/**
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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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Zone.__load_patch('ResizeObserver', (global: any, Zone: any, api: _ZonePrivate) => {
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const ResizeObserver = global['ResizeObserver'];
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if (!ResizeObserver) {
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return;
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}
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const resizeObserverSymbol = api.symbol('ResizeObserver');
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api.patchMethod(global, 'ResizeObserver', (delegate: Function) => (self: any, args: any[]) => {
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const callback = args.length > 0 ? args[0] : null;
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if (callback) {
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args[0] = function(entries: any, observer: any) {
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const zones: {[zoneName: string]: any} = {};
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const currZone = Zone.current;
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for (let entry of entries) {
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let zone = entry.target[resizeObserverSymbol];
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if (!zone) {
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zone = currZone;
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}
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let zoneEntriesInfo = zones[zone.name];
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if (!zoneEntriesInfo) {
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zones[zone.name] = zoneEntriesInfo = {entries: [], zone: zone};
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}
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zoneEntriesInfo.entries.push(entry);
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}
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Object.keys(zones).forEach(zoneName => {
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const zoneEntriesInfo = zones[zoneName];
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if (zoneEntriesInfo.zone !== Zone.current) {
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zoneEntriesInfo.zone.run(
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callback, this, [zoneEntriesInfo.entries, observer], 'ResizeObserver');
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} else {
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callback.call(this, zoneEntriesInfo.entries, observer);
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}
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});
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};
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}
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return args.length > 0 ? new ResizeObserver(args[0]) : new ResizeObserver();
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});
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api.patchMethod(
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ResizeObserver.prototype, 'observe', (delegate: Function) => (self: any, args: any[]) => {
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const target = args.length > 0 ? args[0] : null;
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if (!target) {
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return delegate.apply(self, args);
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}
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let targets = self[resizeObserverSymbol];
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if (!targets) {
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targets = self[resizeObserverSymbol] = [];
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}
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targets.push(target);
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target[resizeObserverSymbol] = Zone.current;
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return delegate.apply(self, args);
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});
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api.patchMethod(
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ResizeObserver.prototype, 'unobserve', (delegate: Function) => (self: any, args: any[]) => {
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const target = args.length > 0 ? args[0] : null;
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if (!target) {
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return delegate.apply(self, args);
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}
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let targets = self[resizeObserverSymbol];
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if (targets) {
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for (let i = 0; i < targets.length; i++) {
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if (targets[i] === target) {
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targets.splice(i, 1);
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break;
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}
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}
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}
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target[resizeObserverSymbol] = undefined;
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return delegate.apply(self, args);
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});
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api.patchMethod(
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ResizeObserver.prototype, 'disconnect', (delegate: Function) => (self: any, args: any[]) => {
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const targets = self[resizeObserverSymbol];
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if (targets) {
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targets.forEach((target: any) => { target[resizeObserverSymbol] = undefined; });
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self[resizeObserverSymbol] = undefined;
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}
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return delegate.apply(self, args);
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});
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});
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