/*
* jQuery Media Plugin for converting elements into rich media content.
*
* Examples and documentation at: http://malsup.com/jquery/media/
* Copyright (c) 2007-2008 M. Alsup
* Dual licensed under the MIT and GPL licenses:
* http://www.opensource.org/licenses/mit-license.php
* http://www.gnu.org/licenses/gpl.html
*
* @author: M. Alsup
* @version: 0.84 (12/01/2008)
* @requires jQuery v1.1.2 or later
* $Id: jquery.media.js 2460 2007-07-23 02:53:15Z malsup $
*
* Supported Media Players:
*    - Flash
*    - Quicktime
*    - Real Player
*    - Silverlight
*    - Windows Media Player
*    - iframe
*
* Supported Media Formats:
*   Any types supported by the above players, such as:
*     Video: asf, avi, flv, mov, mpg, mpeg, mp4, qt, smil, swf, wmv, 3g2, 3gp
*     Audio: aif, aac, au, gsm, mid, midi, mov, mp3, m4a, snd, rm, wav, wma
*     Other: bmp, html, pdf, psd, qif, qtif, qti, tif, tiff, xaml
*
* Thanks to Mark Hicken and Brent Pedersen for helping me debug this on the Mac!
* Thanks to Dan Rossi for numerous bug reports and code bits!
*/
;(function($) {

	/**
	* Chainable method for converting elements into rich media.
	*
	* @param options
	* @param callback fn invoked for each matched element before conversion
	* @param callback fn invoked for each matched element after conversion
	*/
	$.fn.media = function(options, f1, f2) {
		return this.each(function() {
			if (typeof options == 'function') {
				f2 = f1;
				f1 = options;
				options = {};
			}
			var o = getSettings(this, options);
			// pre-conversion callback, passes original element and fully populated options
			if (typeof f1 == 'function') f1(this, o);

			var r = getTypesRegExp();
			var m = r.exec(o.src) || [''];
			o.type ? m[0] = o.type : m.shift();
			for (var i=0; i < m.length; i++) {
				fn = m[i].toLowerCase();
				if (isDigit(fn[0])) fn = 'fn' + fn; // fns can't begin with numbers
				if (!$.fn.media[fn])
				continue;  // unrecognized media type
				// normalize autoplay settings
				var player = $.fn.media[fn+'_player'];
				if (!o.params) o.params = {};
				if (player) {
					var num = player.autoplayAttr == 'autostart';
					o.params[player.autoplayAttr || 'autoplay'] = num ? (o.autoplay ? 1 : 0) : o.autoplay ? true : false;
				}
				var $div = $.fn.media[fn](this, o);

				$div.css('backgroundColor', o.bgColor).width(o.width);
				// post-conversion callback, passes original element, new div element and fully populated options
				if (typeof f2 == 'function') f2(this, $div[0], o, player.name);
				break;
			}
		});
	};

	/**
	* Non-chainable method for adding or changing file format / player mapping
	* @name mapFormat
	* @param String format File format extension (ie: mov, wav, mp3)
	* @param String player Player name to use for the format (one of: flash, quicktime, realplayer, winmedia, silverlight or iframe
	*/
	$.fn.media.mapFormat = function(format, player) {
		if (!format || !player || !$.fn.media.defaults.players[player]) return; // invalid
		format = format.toLowerCase();
		if (isDigit(format[0])) format = 'fn' + format;
		$.fn.media[format] = $.fn.media[player];
		$.fn.media[format+'_player'] = $.fn.media.defaults.players[player];
	};

	// global defautls; override as needed
	$.fn.media.defaults = {
		width:         400,
		height:        400,
		autoplay:      0,         // normalized cross-player setting
		bgColor:       '#ffffff', // background color
		params:        { wmode: 'transparent'},  // added to object element as param elements; added to embed element as attrs
		attrs:         {},        // added to object and embed elements as attrs
		flvKeyName:    'file',    // key used for object src param (thanks to Andrea Ercolino)
		flashvars:     {},        // added to flash content as flashvars param/attr
		flashVersion:  '7',       // required flash version
		expressInstaller: null,   // src for express installer

		// default flash video and mp3 player (@see: http://jeroenwijering.com/?item=Flash_Media_Player)
		flvPlayer:     'mediaplayer.swf',
		mp3Player:     'mediaplayer.swf',

		// @see http://msdn2.microsoft.com/en-us/library/bb412401.aspx
		silverlight: {
			inplaceInstallPrompt: 'true', // display in-place install prompt?
			isWindowless:         'true', // windowless mode (false for wrapping markup)
			framerate:            '24',   // maximum framerate
			version:              '0.9',  // Silverlight version
			onError:              null,   // onError callback
			onLoad:               null,   // onLoad callback
			initParams:           null,   // object init params
			userContext:          null    // callback arg passed to the load callback
		}
	};

	// Media Players; think twice before overriding
	$.fn.media.defaults.players = {
		flash: {
			name:         'flash',
			types:        'flv,mp3,swf',
			oAttrs:   {
				classid:  'clsid:d27cdb6e-ae6d-11cf-96b8-444553540000',
				type:     'application/x-oleobject',
				codebase: 'http://fpdownload.macromedia.com/pub/shockwave/cabs/flash/swflash.cab#version=' + $.fn.media.defaults.flashVersion
			},
			eAttrs: {
				type:         'application/x-shockwave-flash',
				pluginspage:  'http://www.adobe.com/go/getflashplayer'
			}
		},
		quicktime: {
			name:         'quicktime',
			types:        'aif,aiff,aac,au,bmp,gsm,mov,mid,midi,mpg,mpeg,mp4,m4a,psd,qt,qtif,qif,qti,snd,tif,tiff,wav,3g2,3gp',
			oAttrs:   {
				classid:  'clsid:02BF25D5-8C17-4B23-BC80-D3488ABDDC6B',
				codebase: 'http://www.apple.com/qtactivex/qtplugin.cab'
			},
			eAttrs: {
				pluginspage:  'http://www.apple.com/quicktime/download/'
			}
		},
		realplayer: {
			name:         'real',
			types:        'ra,ram,rm,rpm,rv,smi,smil',
			autoplayAttr: 'autostart',
			oAttrs:   {
				classid:  'clsid:CFCDAA03-8BE4-11cf-B84B-0020AFBBCCFA'
			},
			eAttrs: {
				type:         'audio/x-pn-realaudio-plugin',
				pluginspage:  'http://www.real.com/player/'
			}
		},
		winmedia: {
			name:         'winmedia',
			types:        'asf,avi,wma,wmv',
			autoplayAttr: 'autostart',
			oUrl:         'url',
			oAttrs:   {
				classid:  'clsid:6BF52A52-394A-11d3-B153-00C04F79FAA6',
				type:     'application/x-oleobject'
			},
			eAttrs: {
				type:         $.browser.mozilla && isFirefoxWMPPluginInstalled() ? 'application/x-ms-wmp' : 'application/x-mplayer2',
				pluginspage:  'http://www.microsoft.com/Windows/MediaPlayer/'
			}
		},
		// special cases
		iframe: {
			name:  'iframe',
			types: 'html,pdf'
		},
		silverlight: {
			name:  'silverlight',
			types: 'xaml'
		}
	};

	//
	//  everything below here is private
	//


	// detection script for FF WMP plugin (http://www.therossman.org/experiments/wmp_play.html)
	// (hat tip to Mark Ross for this script)
	function isFirefoxWMPPluginInstalled() {
		var plugs = navigator.plugins;
		for (i = 0; i < plugs.length; i++) {
			var plugin = plugs[i];
			if (plugin['filename'] == 'np-mswmp.dll')
			return true;
		}
		return false;
	}

	var counter = 1;

	for (var player in $.fn.media.defaults.players) {
		var types = $.fn.media.defaults.players[player].types;
		$.each(types.split(','), function(i,o) {
			if (isDigit(o[0])) o = 'fn' + o;
			$.fn.media[o] = $.fn.media[player] = getGenerator(player);
			$.fn.media[o+'_player'] = $.fn.media.defaults.players[player];
		});
	};

	function getTypesRegExp() {
		var types = '';
		for (var player in $.fn.media.defaults.players) {
			if (types.length) types += ',';
			types += $.fn.media.defaults.players[player].types;
		};
		return new RegExp('\\.(' + types.replace(/,/g,'|') + ')$\\b');
	};

	function getGenerator(player) {
		return function(el, options) {
			return generate(el, options, player);
		};
	};

	function isDigit(c) {
		return '0123456789'.indexOf(c) > -1;
	};

	// flatten all possible options: global defaults, meta, option obj
	function getSettings(el, options) {
		options = options || {};
		var $el = $(el);
		var cls = el.className || '';
		// support metadata plugin (v1.0 and v2.0)
		var meta = $.metadata ? $el.metadata() : $.meta ? $el.data() : {};
		meta = meta || {};
		var w = meta.width  || parseInt(((cls.match(/w:(\d+)/)||[])[1]||0));
		var h = meta.height || parseInt(((cls.match(/h:(\d+)/)||[])[1]||0));

		if (w) meta.width  = w;
		if (h) meta.height = h;
		if (cls) meta.cls = cls;

		var a = $.fn.media.defaults;
		var b = options;
		var c = meta;

		var p = { params: { bgColor: options.bgColor || $.fn.media.defaults.bgColor } };
		var opts = $.extend({}, a, b, c);
		$.each(['attrs','params','flashvars','silverlight'], function(i,o) {
			opts[o] = $.extend({}, p[o] || {}, a[o] || {}, b[o] || {}, c[o] || {});
		});

		if (typeof opts.caption == 'undefined') opts.caption = $el.text();

		// make sure we have a source!
		opts.src = opts.src || $el.attr('href') || $el.attr('src') || 'unknown';
		return opts;
	};

	//
	//  Flash Player
	//

	// generate flash using SWFObject library if possible
	$.fn.media.swf = function(el, opts) {
		if (!window.SWFObject && !window.swfobject) {
			// roll our own
			if (opts.flashvars) {
				var a = [];
				for (var f in opts.flashvars)
				a.push(f + '=' + opts.flashvars[f]);
				if (!opts.params) opts.params = {};
				opts.params.flashvars = a.join('&');
			}
			return generate(el, opts, 'flash');
		}

		var id = el.id ? (' id="'+el.id+'"') : '';
		var cls = opts.cls ? (' class="' + opts.cls + '"') : '';
		var $div = $('<div' + id + cls + '>');

		// swfobject v2+
		if (window.swfobject) {
			$(el).after($div).appendTo($div);
			if (!el.id) el.id = 'movie_player_' + counter++;

			// replace el with swfobject content
			swfobject.embedSWF(opts.src, el.id, opts.width, opts.height, opts.flashVersion,
			opts.expressInstaller, opts.flashvars, opts.params, opts.attrs);
		}
		// swfobject < v2
		else {
			$(el).after($div).remove();
			var so = new SWFObject(opts.src, 'movie_player_' + counter++, opts.width, opts.height, opts.flashVersion, opts.bgColor);
			if (opts.expressInstaller) so.useExpressInstall(opts.expressInstaller);

			for (var p in opts.params)
			if (p != 'bgColor') so.addParam(p, opts.params[p]);
			for (var f in opts.flashvars)
			so.addVariable(f, opts.flashvars[f]);
			so.write($div[0]);
		}

		if (opts.caption) $('<div>').appendTo($div).html(opts.caption);
		return $div;
	};

	// map flv and mp3 files to the swf player by default
	$.fn.media.flv = $.fn.media.mp3 = function(el, opts) {
		var src = opts.src;
		var player = /\.mp3\b/i.test(src) ? $.fn.media.defaults.mp3Player : $.fn.media.defaults.flvPlayer;
		var key = opts.flvKeyName;
		src = encodeURIComponent(src);
		opts.src = player;
		opts.src = opts.src + '?'+key+'=' + (src);
		var srcObj = {};
		srcObj[key] = src;
		opts.flashvars = $.extend({}, srcObj, opts.flashvars );
		return $.fn.media.swf(el, opts);
	};

	//
	//  Silverlight
	//
	$.fn.media.xaml = function(el, opts) {
		if (!window.Sys || !window.Sys.Silverlight) {
			if ($.fn.media.xaml.warning) return;
			$.fn.media.xaml.warning = 1;
			alert('You must include the Silverlight.js script.');
			return;
		}

		var props = {
			width: opts.width,
			height: opts.height,
			background: opts.bgColor,
			inplaceInstallPrompt: opts.silverlight.inplaceInstallPrompt,
			isWindowless: opts.silverlight.isWindowless,
			framerate: opts.silverlight.framerate,
			version: opts.silverlight.version
		};
		var events = {
			onError: opts.silverlight.onError,
			onLoad: opts.silverlight.onLoad
		};

		var id1 = el.id ? (' id="'+el.id+'"') : '';
		var id2 = opts.id || 'AG' + counter++;
		// convert element to div
		var cls = opts.cls ? (' class="' + opts.cls + '"') : '';
		var $div = $('<div' + id1 + cls + '>');
		$(el).after($div).remove();

		Sys.Silverlight.createObjectEx({
			source: opts.src,
			initParams: opts.silverlight.initParams,
			userContext: opts.silverlight.userContext,
			id: id2,
			parentElement: $div[0],
			properties: props,
			events: events
		});

		if (opts.caption) $('<div>').appendTo($div).html(opts.caption);
		return $div;
	};

	//
	// generate object/embed markup
	//
	function generate(el, opts, player) {
		var $el = $(el);
		var o = $.fn.media.defaults.players[player];

		if (player == 'iframe') {
			var o = $('<iframe' + ' width="' + opts.width + '" height="' + opts.height + '" >');
			o.attr('src', opts.src);
			o.css('backgroundColor', o.bgColor);
		}
		else if ($.browser.msie) {
			var a = ['<object width="' + opts.width + '" height="' + opts.height + '" '];
			for (var key in opts.attrs)
			a.push(key + '="'+opts.attrs[key]+'" ');
			for (var key in o.oAttrs || {}) {
				var v = o.oAttrs[key];
				if (key == 'codebase' && window.location.protocol == 'https')
				v = v.replace('http','https');
				a.push(key + '="'+v+'" ');
			}
			a.push('></ob'+'ject'+'>');
			var p = ['<param name="' + (o.oUrl || 'src') +'" value="' + opts.src + '">'];
			for (var key in opts.params)
			p.push('<param name="'+ key +'" value="' + opts.params[key] + '">');
			var o = document.createElement(a.join(''));
			for (var i=0; i < p.length; i++)
			o.appendChild(document.createElement(p[i]));
		}
		else {
			var a = ['<embed width="' + opts.width + '" height="' + opts.height + '" style="display:block"'];
			if (opts.src) a.push(' src="' + opts.src + '" ');
			for (var key in opts.attrs)
			a.push(key + '="'+opts.attrs[key]+'" ');
			for (var key in o.eAttrs || {})
			a.push(key + '="'+o.eAttrs[key]+'" ');
			for (var key in opts.params)
			if (key != 'wmode') // FF3/Quicktime borks on wmode
			a.push(key + '="'+opts.params[key]+'" ');
			a.push('></em'+'bed'+'>');
		}
		// convert element to div
		var id = el.id ? (' id="'+el.id+'"') : '';
		var cls = opts.cls ? (' class="' + opts.cls + '"') : '';
		var $div = $('<div' + id + cls + '>');
		$el.after($div).remove();
		($.browser.msie || player == 'iframe') ? $div.append(o) : $div.html(a.join(''));
		if (opts.caption) $('<div>').appendTo($div).html(opts.caption);
		return $div;
	};


})(jQuery);