// Copyright 2008 The Closure Library Authors. All Rights Reserved.
//
// 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.

/**
 * @fileoverview Detects the specific browser and not just the rendering engine.
 *
 */

goog.provide('goog.userAgent.product');

goog.require('goog.labs.userAgent.browser');
goog.require('goog.labs.userAgent.platform');
goog.require('goog.userAgent');


/**
 * @define {boolean} Whether the code is running on the Firefox web browser.
 */
goog.define('goog.userAgent.product.ASSUME_FIREFOX', false);


/**
 * @define {boolean} Whether we know at compile-time that the product is an
 *     iPhone.
 */
goog.define('goog.userAgent.product.ASSUME_IPHONE', false);


/**
 * @define {boolean} Whether we know at compile-time that the product is an
 *     iPad.
 */
goog.define('goog.userAgent.product.ASSUME_IPAD', false);


/**
 * @define {boolean} Whether we know at compile-time that the product is an
 *     AOSP browser or WebView inside a pre KitKat Android phone or tablet.
 */
goog.define('goog.userAgent.product.ASSUME_ANDROID', false);


/**
 * @define {boolean} Whether the code is running on the Chrome web browser on
 * any platform or AOSP browser or WebView in a KitKat+ Android phone or tablet.
 */
goog.define('goog.userAgent.product.ASSUME_CHROME', false);


/**
 * @define {boolean} Whether the code is running on the Safari web browser.
 */
goog.define('goog.userAgent.product.ASSUME_SAFARI', false);


/**
 * Whether we know the product type at compile-time.
 * @type {boolean}
 * @private
 */
goog.userAgent.product.PRODUCT_KNOWN_ =
    goog.userAgent.ASSUME_IE ||
    goog.userAgent.ASSUME_OPERA ||
    goog.userAgent.product.ASSUME_FIREFOX ||
    goog.userAgent.product.ASSUME_IPHONE ||
    goog.userAgent.product.ASSUME_IPAD ||
    goog.userAgent.product.ASSUME_ANDROID ||
    goog.userAgent.product.ASSUME_CHROME ||
    goog.userAgent.product.ASSUME_SAFARI;


/**
 * Whether the code is running on the Opera web browser.
 * @type {boolean}
 */
goog.userAgent.product.OPERA = goog.userAgent.OPERA;


/**
 * Whether the code is running on an IE web browser.
 * @type {boolean}
 */
goog.userAgent.product.IE = goog.userAgent.IE;


/**
 * Whether the code is running on the Firefox web browser.
 * @type {boolean}
 */
goog.userAgent.product.FIREFOX = goog.userAgent.product.PRODUCT_KNOWN_ ?
    goog.userAgent.product.ASSUME_FIREFOX :
    goog.labs.userAgent.browser.isFirefox();


/**
 * Whether the user agent is an iPhone or iPod (as in iPod touch).
 * @return {boolean}
 * @private
 */
goog.userAgent.product.isIphoneOrIpod_ = function() {
  return goog.labs.userAgent.platform.isIphone() ||
      goog.labs.userAgent.platform.isIpod();
};


/**
 * Whether the code is running on an iPhone or iPod touch.
 *
 * iPod touch is considered an iPhone for legacy reasons.
 * @type {boolean}
 */
goog.userAgent.product.IPHONE = goog.userAgent.product.PRODUCT_KNOWN_ ?
    goog.userAgent.product.ASSUME_IPHONE :
    goog.userAgent.product.isIphoneOrIpod_();


/**
 * Whether the code is running on an iPad.
 * @type {boolean}
 */
goog.userAgent.product.IPAD = goog.userAgent.product.PRODUCT_KNOWN_ ?
    goog.userAgent.product.ASSUME_IPAD :
    goog.labs.userAgent.platform.isIpad();


/**
 * Whether the code is running on AOSP browser or WebView inside
 * a pre KitKat Android phone or tablet.
 * @type {boolean}
 */
goog.userAgent.product.ANDROID = goog.userAgent.product.PRODUCT_KNOWN_ ?
    goog.userAgent.product.ASSUME_ANDROID :
    goog.labs.userAgent.browser.isAndroidBrowser();


/**
 * Whether the code is running on the Chrome web browser on any platform
 * or AOSP browser or WebView in a KitKat+ Android phone or tablet.
 * @type {boolean}
 */
goog.userAgent.product.CHROME = goog.userAgent.product.PRODUCT_KNOWN_ ?
    goog.userAgent.product.ASSUME_CHROME :
    goog.labs.userAgent.browser.isChrome();


/**
 * @return {boolean} Whether the browser is Safari on desktop.
 * @private
 */
goog.userAgent.product.isSafariDesktop_ = function() {
  return goog.labs.userAgent.browser.isSafari() &&
      !goog.labs.userAgent.platform.isIos();
};


/**
 * Whether the code is running on the desktop Safari web browser.
 * Note: the legacy behavior here is only true for Safari not running
 * on iOS.
 * @type {boolean}
 */
goog.userAgent.product.SAFARI = goog.userAgent.product.PRODUCT_KNOWN_ ?
    goog.userAgent.product.ASSUME_SAFARI :
    goog.userAgent.product.isSafariDesktop_();
