86 lines
3.3 KiB
JavaScript
86 lines
3.3 KiB
JavaScript
/**
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* @license
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* Copyright 2020 Google Inc.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*/
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/**
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* AnimationFrame provides a user-friendly abstraction around requesting
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* and canceling animation frames.
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*/
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var AnimationFrame = /** @class */ (function () {
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function AnimationFrame() {
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this.rafIDs = new Map();
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}
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/**
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* Requests an animation frame. Cancels any existing frame with the same key.
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* @param {string} key The key for this callback.
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* @param {FrameRequestCallback} callback The callback to be executed.
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*/
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AnimationFrame.prototype.request = function (key, callback) {
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var _this = this;
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this.cancel(key);
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var frameID = requestAnimationFrame(function (frame) {
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_this.rafIDs.delete(key);
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// Callback must come *after* the key is deleted so that nested calls to
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// request with the same key are not deleted.
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callback(frame);
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});
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this.rafIDs.set(key, frameID);
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};
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/**
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* Cancels a queued callback with the given key.
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* @param {string} key The key for this callback.
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*/
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AnimationFrame.prototype.cancel = function (key) {
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var rafID = this.rafIDs.get(key);
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if (rafID) {
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cancelAnimationFrame(rafID);
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this.rafIDs.delete(key);
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}
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};
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/**
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* Cancels all queued callback.
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*/
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AnimationFrame.prototype.cancelAll = function () {
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var _this = this;
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// Need to use forEach because it's the only iteration method supported
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// by IE11. Suppress the underscore because we don't need it.
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// tslint:disable-next-line:enforce-name-casing
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this.rafIDs.forEach(function (_, key) {
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_this.cancel(key);
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});
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};
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/**
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* Returns the queue of unexecuted callback keys.
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*/
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AnimationFrame.prototype.getQueue = function () {
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var queue = [];
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// Need to use forEach because it's the only iteration method supported
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// by IE11. Suppress the underscore because we don't need it.
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// tslint:disable-next-line:enforce-name-casing
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this.rafIDs.forEach(function (_, key) {
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queue.push(key);
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});
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return queue;
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};
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return AnimationFrame;
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}());
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export { AnimationFrame };
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//# sourceMappingURL=animationframe.js.map
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