/**
* @license
* Copyright 2016 Google Inc.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
goog.provide('shaka.util.Platform');
/**
* A wrapper for platform-specific functions.
*
* @final
*/
shaka.util.Platform = class {
/**
* Check if the current platform is MS Edge.
*
* @return {boolean}
*/
static isEdge() {
return shaka.util.Platform.userAgentContains_('Edge/');
}
/**
* Check if the current platform is MS IE.
*
* @return {boolean}
*/
static isIE() {
return shaka.util.Platform.userAgentContains_('Trident/');
}
/**
* Check if the current platform is a Tizen TV.
*
* @return {boolean}
*/
static isTizen() {
return shaka.util.Platform.userAgentContains_('Tizen');
}
/**
* Check if the current platform is a Tizen 3 TV.
*
* @return {boolean}
*/
static isTizen3() {
return shaka.util.Platform.userAgentContains_('Tizen 3');
}
/**
* Check if the current platform is a Google Chromecast.
*
* @return {boolean}
*/
static isChromecast() {
return shaka.util.Platform.userAgentContains_('CrKey');
}
/**
* Check if the current platform is Google Chrome.
*
* @return {boolean}
*/
static isChrome() {
// The Edge user agent will also contain the "Chrome" keyword, so we need
// to make sure this is not Edge.
return shaka.util.Platform.userAgentContains_('Chrome') &&
!shaka.util.Platform.isEdge();
}
/**
* Check if the user agent contains a key. This is the best way we know of
* right now to detect platforms. If there is a better way, please send a
* PR.
*
* @param {string} key
* @return {boolean}
* @private
*/
static userAgentContains_(key) {
const userAgent = navigator.userAgent || '';
return userAgent.includes(key);
}
};