/*
* 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: 0.85 (07-FEB-2009)
* @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: 720,
        height: 420,
        autoplay: 1,         // normalized cross-player setting
        bgColor: '#000000', // 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
        caption: false,

        // 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/',
                controller: 'true'
            }
        },
        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: 'asx,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);