path: root/js/jquery.media.js

/*
 * 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: 0.92 (24-SEP-2009)
 * @requires jQuery v1.1.2 or later
 *
 * 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!
 * Thanks to Skye Giordano for several great suggestions!
 * Thanks to Richard Connamacher for excellent improvements to the non-IE behavior!
 */
;(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) {
	if (options == 'undo') {
		return this.each(function() {
			var $this = $(this);
			var html = $this.data('media.origHTML');
			if (html)
				$this.replaceWith(html);
		});
	}
	
	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.toLowerCase()) || [''];

		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);
			
			if (o.canUndo) {
				var $temp = $('<div></div>').append(this);
				$div.data('media.origHTML', $temp.html()); // store original markup
			}
			
			// 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 = {
	standards:  false,      // use object tags only (no embeds for non-IE browsers)
	canUndo:    true,       // tells plugin to store the original markup so it can be reverted via: $(sel).mediaUndo()
	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',
		title:		 'Flash',
		types:		 'flv,mp3,swf',
		mimetype:	 'application/x-shockwave-flash',
		pluginspage: 'http://www.adobe.com/go/getflashplayer',
		ieAttrs: {
			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
		}
	},
	quicktime: {
		name:		 'quicktime',
		title:		 'QuickTime',
		mimetype:	 'video/quicktime',
		pluginspage: 'http://www.apple.com/quicktime/download/',
		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',
		ieAttrs: {
			classid:  'clsid:02BF25D5-8C17-4B23-BC80-D3488ABDDC6B',
			codebase: 'http://www.apple.com/qtactivex/qtplugin.cab'
		}
	},
	realplayer: {
		name:		  'real',
		title:		  'RealPlayer',
		types:		  'ra,ram,rm,rpm,rv,smi,smil',
		mimetype:	  'audio/x-pn-realaudio-plugin',
		pluginspage:  'http://www.real.com/player/',
		autoplayAttr: 'autostart',
		ieAttrs: {
			classid: 'clsid:CFCDAA03-8BE4-11cf-B84B-0020AFBBCCFA'
		}
	},
	winmedia: {
		name:		  'winmedia',
		title:		  'Windows Media',
		types:		  'asx,asf,avi,wma,wmv',
		mimetype:	  $.browser.mozilla && isFirefoxWMPPluginInstalled() ? 'application/x-ms-wmp' : 'application/x-mplayer2',
		pluginspage:  'http://www.microsoft.com/Windows/MediaPlayer/',
		autoplayAttr: 'autostart',
		oUrl:		  'url',
		ieAttrs: {
			classid:  'clsid:6BF52A52-394A-11d3-B153-00C04F79FAA6',
			type:	  'application/x-oleobject'
		}
	},
	// 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 (var 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 += $.fn.media.defaults.players[player].types;
	};
	return new RegExp('\\.(' + types.replace(/,/ig,'|') + ')\\b$');
};

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.ieAttrs || {}) {
			var v = o.ieAttrs[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 if (o.standards) {
		// Rewritten to be standards compliant by Richard Connamacher
		var a = ['<object type="' + o.mimetype +'" width="' + opts.width + '" height="' + opts.height +'"'];
		if (opts.src) a.push(' data="' + opts.src + '" ');
		a.push('>');
		a.push('<param name="' + (o.oUrl || 'src') +'" value="' + opts.src + '">');
		for (var key in opts.params) {
			if (key == 'wmode' && player != 'flash') // FF3/Quicktime borks on wmode
				continue;
			a.push('<param name="'+ key +'" value="' + opts.params[key] + '">');
		}
		// Alternate HTML
		a.push('<div><p><strong>'+o.title+' Required</strong></p><p>'+o.title+' is required to view this media. <a href="'+o.pluginspage+'">Download Here</a>.</p></div>');
		a.push('</ob'+'ject'+'>');
	}
	 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' && player != 'flash') // FF3/Quicktime borks on wmode
	            	continue;
	            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);