Automattic / jetpack

	/*

	 is_webkit() can be used to check the User Agent for an webkit generic browser

	 */

	static function is_webkit() {

		if ( empty( $_SERVER['HTTP_USER_AGENT'] ) )

		return false;

		$agent = strtolower( $_SERVER['HTTP_USER_AGENT'] );

		$pos_webkit = strpos( $agent, 'webkit' );

		if ( $pos_webkit !== false )

			return true;

		else

			return false;

	}

    /**

     * Detects if the current browser is the Native Android browser.

 	*

 	* @return boolean true if the browser is Kindle monochrome Native browser otherwise false

 	*/

 	static function is_kindle_touch( ) {

 		if ( empty( $_SERVER['HTTP_USER_AGENT'] ) )

 			return false;

 		$agent = strtolower( $_SERVER['HTTP_USER_AGENT'] );

 		$pos_kindle_touch = strpos( $agent, 'kindle/3.0+' );

 		if ( false !== $pos_kindle_touch && false === self::is_kindle_fire() )

 			return true;

 		else

 			return false;

 		}

	// Detect if user agent is the WordPress.com Windows 8 app (used ONLY on the custom oauth stylesheet)

	// Detect if user agent is the WordPress.com Windows 8 app (used ONLY on the custom oauth stylesheet)

	static function is_windows8_auth( ) {

		if ( empty( $_SERVER['HTTP_USER_AGENT'] ) )

			return false;

		$agent = strtolower( $_SERVER['HTTP_USER_AGENT'] );

		$pos = strpos( $agent, 'msauthhost' );

		if ( false !== $pos )

	   		return true;

		else

			return false;

	}

	// Detect if user agent is the WordPress.com Windows 8 app.

	static function is_wordpress_for_win8( ) {

	}

	// Detect if user agent is the WordPress.com Windows 8 app.

	static function is_wordpress_for_win8( ) {

		if ( empty( $_SERVER['HTTP_USER_AGENT'] ) )

			return false;

		$agent = strtolower( $_SERVER['HTTP_USER_AGENT'] );

		$pos   = strpos( $agent, 'wp-windows8' );

		if ( false !== $pos )

			return true;

		else

			return false;

	}

	// Detect if user agent is the WordPress.com Desktop app.