/*

File: qtp_movie.js

Version: <2.0>

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*/ 

if (typeof(QTP) == "undefined") { 
	/** QTP is a namespace for QuickTime Player javascript objects. */
	QTP = {}; 
}

/**
 * @fileoverview This file contains functions to generate a JavaScript-based QuickTime movie 
 * object, compatable with both Desktop and iPhone platforms. 
 *
 * @requires Prototype.Browser (Prototype.js or Mini_prototype.js)
 * @requires Event.observe (Prototype.js or Mini_prototype.js)
 */

/** 
 * Movie is an class which abstracts the creation of embed/object/video tags.
 * The correct tag will be created depending on the user's browser.
 * @param {Object} hash a key-value dictionary of attributes
 * @constructor
 * @example
 * var movie = new Movie({src: 'myMovie.mov', autoplay: 'false', scale: 'aspect'});
 * document.body.appendChild(movie.element);
 */
QTP.Movie = function(hash)
{
	
	// Create a <video> tag for builds of Safari which support it:
	if( QTP.Movie.useVideoTag && QTP.Movie.isVideoTagSupported() )
	{
		this.element = document.createElement( 'video' );
		this.addParameters(hash);
	}
	else
	{
		this.element = document.createElement( 'object' );
	
		if( Prototype.Browser.IE )
		{
			this.element.setAttribute('codebase', 'http://www.apple.com/qtactivex/qtplugin.cab#version=7,1,6,0');
		}
		else
		{
			this.element.setAttribute('type', 'video/quicktime');
		}
		
		this.addParameters(hash);
		
		if( Prototype.Browser.IE )
		{
			this.element.setAttribute('classid', 'clsid:02BF25D5-8C17-4B23-BC80-D3488ABDDC6B');
		}
	}
};

/**
 * Determines whether to use the &lt;video&gt; tag where supported.  Defaults to true.
 * @type boolean
 */
QTP.Movie.useVideoTag = true;
	
/**
 * The DOM element created by Movie, either an embed, object, or video tag
 * depending on the user's browser.
 * @type DOMElement
 */
QTP.Movie.prototype.element = null;

/**
 *
 */
QTP.Movie.isVideoTagSupported = function()
{
	try {
		if (typeof(window.HTMLVideoElement) == 'undefined')
			return false;
			
		var video = document.createElement('video');
        if (video instanceof HTMLVideoElement && video.canPlayType)
            return video.canPlayType("video/quicktime");
		else
			return false;
	} catch(err) {
		return false;
	}	
}
	
/**
 * Adds the specified attribute key and value to the DOM element. Keys of the type 
 * "obj#xxx" and "emb#xxx" are supported and will be added only if the DOM element 
 * type is appropriate.  The parameter will be of the form of a tag attribute, or a child
 * param object, depending on the DOM element type and the parameter key.
 * @param {String} key The attribute name
 * @param {String} value The attribute value
 */
QTP.Movie.prototype.addParameter = function(key, value)
{
	if( this.element.tagName.toLowerCase() == 'embed' )
	{
		if(key.toLowerCase().indexOf('obj#') == 0)
			return; // Do not add obj-specific tags to embeds
		this.element.setAttribute(key, value);
	}
	else if( this.element.tagName.toLowerCase() == 'object' )
	{
		if(key.toLowerCase().indexOf('emb#') == 0)
			return; // Do not add emb-specific tags to objects
		if(key.toLowerCase() == 'width' || key.toLowerCase() == 'height' || key.toLowerCase() == 'id' || key.toLowerCase() == 'data')
			this.element.setAttribute(key, value);
		else if(key.toLowerCase() == 'src' && Prototype.Browser.Gecko)
		{
			this.element.setAttribute('data', value);
		}
		else
		{
			var param = document.createElement('param');
			param.setAttribute('name', key);
			param.setAttribute('value', value);
			this.element.appendChild(param);
		}
	}
	else if( this.element.tagName.toLowerCase() == 'video' )
	{
		if(key.toLowerCase().indexOf('emb#') == 0 || key.toLowerCase().indexOf('obj#') == 0)
			return; // Do not add emb- or obj-specific tags to objects
			
		// convert from embed-style keys to video tag keys
		switch(key.toLowerCase()) {
			case 'controller':
				key = 'controls';
			case 'autoplay':
				if(value.toLowerCase() == 'false')
					return; // for the <video> tag, the presence of a boolean attribute == 'true'
				break;
		}

		this.element.setAttribute(key, value);					
	}
};

/**
 * Removes the specified attribute from the DOM element, whether the attribute is
 * a tag attribute, or a child param tag.
 * @param {String} key The attribute name
 */
QTP.Movie.prototype.removeParameter = function(key)
{
	if( this.element.hasAttribute(key) )
		this.element.removeAttribute(key);
	else
	{
		for(i in childNodes)
		{
			if(childNodes[i].getAttribute('name') == key)
			{
				this.element.removeChild(childNodes[i]);
			}
		}
	}
};

/** 
 * Replaces an existing parameter value with a new one.  The new value is set
 * whether or not the previous value exists.
 * @param {String} key The attribute name
 * @param {String} value The attribute value
 */
QTP.Movie.prototype.replaceParameter = function(key, value)
{
	this.removeParameter(key);
	this.addParameter(key, value);
};

/**
 * Adds the specified attribute key and value to the DOM element.
 * @param {Object} pair A key-value pair
 * @config {String} key The attribute name
 * @config {String} value The attribute value
 */
QTP.Movie.prototype.addParameterPair = function(pair)
{
	return this.addParameter(pair.key, pair.value);
};
	
/**
 * Adds the specified attributes to the DOM element.
 * @param {Array} pair An array of key-value pairs
 * @config {String} key The attribute name
 * @config {String} value The attribute value
 */
QTP.Movie.prototype.addParameters = function(hash)
{
	for(var key in hash )
	{
		this.addParameter(key, hash[key]);
	}
};

/**
 * Determines whether the DOM element has enabled DOM media events.
 * @returns {boolean} true, if elements have been enabled.
 */
QTP.Movie.prototype.areEventsEnabled = function()
{
	switch(this.element.tagName.toLowerCase())
	{
	case 'video':
	case 'embed':
		return this.element.getAttribute('postdomevents').toLowerCase() == 'true';
	case 'object':
		var params = this.element.getElementsByTagName('param');
		for(var index in params)
			if(params[index].name == 'postdomevents' && params[index].value == 'true')
				return true;
	}
	return false;
}

/**
 * Determines whether the DOM element supports HTML5-style media events.
 * @returns {boolean} true, if elements are supported. false, if elements are not supported.
 * undefined, if the plugin is not sufficiently loaded to make a determination.
 */
QTP.Movie.prototype.areEventsSupported = function()
{
	if(typeof(this._eventsSupported) != 'undefined')
		return this._eventsSupported;
		
	if(QTP.isMobileSafari() && this.areEventsEnabled())
	{
		this._eventsSupported = true;
		return this._eventsSupported;
	}
	
	$A(navigator.plugins).each(function(plugin) {
		if(plugin.name.indexOf('QuickTime Plug-In ') != 0)
			return;
		var version = plugin.name.slice(18).split('.');
		if(version.length < 3)
			version[2] = 0;
		if(!(version[0] < 7 || version[1] < 2 || version[2] < 1))
			this._evenstSupported = true;
	}.bind(this));
	
	return this._eventsSupported;
};

/**
 * Detects if the browser is an iPhone/iPod Touch
 * @returns bool <code>true</code> if the browser user agent is Mobile Safari, <code>false</code> otherwise.
 */
QTP.isMobileSafari = function()
{
	var ua = navigator.userAgent;
	return RegExp(" AppleWebKit/").test(ua) && RegExp(" Mobile/").test(ua)
};