/*

        File: AC_QuickTime.js

        Abstract: This file contains functions to generate OBJECT and EMBED tags for QuickTime content.

        Version: <1.2>

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        */

        /*
         * This file contains functions to generate OBJECT and EMBED tags for QuickTime content.
         */

        /************** LOCALIZABLE GLOBAL VARIABLES ****************/

        var gArgCountErr =	'The "%%" function requires an even number of arguments.'
                        +	'\nArguments should be in the form "atttributeName", "attributeValue", ...';

        /******************** END LOCALIZABLE **********************/

        var gTagAttrs				= null;
        var gQTGeneratorVersion		= 1.2;
        var gQTBehaviorID			= "qt_event_source";
        var gQTEventsEnabled		= false;

        function AC_QuickTimeVersion()	{ return gQTGeneratorVersion; }

        function _QTComplain(callingFcnName, errMsg)
        {
            errMsg = errMsg.replace("%%", callingFcnName);
            alert(errMsg);
        }

        function _QTIsMSIE()
        {
            var ua = navigator.userAgent.toLowerCase();
            var msie = /msie/.test(ua) && !/opera/.test(ua);

            return msie;
        }


        function _QTGenerateBehavior()
        {
            return objTag = '<!--[if IE]>'
                         + '<object id="' + gQTBehaviorID + '" classid="clsid:CB927D12-4FF7-4a9e-A169-56E4B8A75598"></object>'
                         + '<![endif]-->';
        }

        function _QTPageHasBehaviorObject(callingFcnName, args)
        {
            var haveBehavior = false;
            var objects = document.getElementsByTagName('object');

            for ( var ndx = 0, obj; obj = objects[ndx]; ndx++ )
            {
                if ( obj.getAttribute('classid') == "clsid:CB927D12-4FF7-4a9e-A169-56E4B8A75598" )
                {
                    if ( obj.getAttribute('id') == gQTBehaviorID )
                        haveBehavior = false;
                    break;
                }
            }

            return haveBehavior;
        }


        function _QTShouldInsertBehavior()
        {
            var		shouldDo = false;

            if ( gQTEventsEnabled && _QTIsMSIE() && !_QTPageHasBehaviorObject() )
                shouldDo = true;

            return shouldDo;
        }


        function _QTAddAttribute(prefix, slotName, tagName)
        {
            var		value;

            value = gTagAttrs[prefix + slotName];
            if ( null == value )
                value = gTagAttrs[slotName];

            if ( null != value )
            {
                if ( 0 == slotName.indexOf(prefix) && (null == tagName) )
                    tagName = slotName.substring(prefix.length);
                if ( null == tagName )
                    tagName = slotName;
                return ' ' + tagName + '="' + value + '"';
            }
            else
                return "";
        }

        function _QTAddObjectAttr(slotName, tagName)
        {
            // don't bother if it is only for the embed tag
            if ( 0 == slotName.indexOf("emb#") )
                return "";

            if ( 0 == slotName.indexOf("obj#") && (null == tagName) )
                tagName = slotName.substring(4);

            return _QTAddAttribute("obj#", slotName, tagName);
        }

        function _QTAddEmbedAttr(slotName, tagName)
        {
            // don't bother if it is only for the object tag
            if ( 0 == slotName.indexOf("obj#") )
                return "";

            if ( 0 == slotName.indexOf("emb#") && (null == tagName) )
                tagName = slotName.substring(4);

            return _QTAddAttribute("emb#", slotName, tagName);
        }


        function _QTAddObjectParam(slotName, generateXHTML)
        {
            var		paramValue;
            var		paramStr = "";
            var		endTagChar = (generateXHTML) ? ' />' : '>';

            if ( -1 == slotName.indexOf("emb#") )
            {
                // look for the OBJECT-only param first. if there is none, look for a generic one
                paramValue = gTagAttrs["obj#" + slotName];
                if ( null == paramValue )
                    paramValue = gTagAttrs[slotName];

                if ( 0 == slotName.indexOf("obj#") )
                    slotName = slotName.substring(4);

                if ( null != paramValue )
                    paramStr = '<param name="' + slotName + '" value="' + paramValue + '"' + endTagChar;
            }

            return paramStr;
        }

        function _QTDeleteTagAttrs()
        {
            for ( var ndx = 0; ndx < arguments.length; ndx++ )
            {
                var attrName = arguments[ndx];
                delete gTagAttrs[attrName];
                delete gTagAttrs["emb#" + attrName];
                delete gTagAttrs["obj#" + attrName];
            }
        }


        // generate an embed and object tag, return as a string
        function _QTGenerate(callingFcnName, generateXHTML, args)
        {
            // is the number of optional arguments even?
            if ( args.length < 4 || (0 != (args.length % 2)) )
            {
                _QTComplain(callingFcnName, gArgCountErr);
                return "";
            }

            // allocate an array, fill in the required attributes with fixed place params and defaults
            gTagAttrs = new Object();
            gTagAttrs["src"] = args[0];
            gTagAttrs["width"] = args[1];
            gTagAttrs["height"] = args[2];
            gTagAttrs["classid"] = "clsid:02BF25D5-8C17-4B23-BC80-D3488ABDDC6B";
                //Impportant note: It is recommended that you use this exact classid in order to ensure a seamless experience for all viewers
            gTagAttrs["pluginspage"] = "http://www.apple.com/quicktime/download/";

            // set up codebase attribute with specified or default version before parsing args so
            //  anything passed in will override
            var activexVers = args[3]
            if ( (null == activexVers) || ("" == activexVers) )
                activexVers = "7,3,0,0";
            gTagAttrs["codebase"] = "http://www.apple.com/qtactivex/qtplugin.cab#version=" + activexVers;

            var	attrName,
                attrValue;

            // add all of the optional attributes to the array
            for ( var ndx = 4; ndx < args.length; ndx += 2)
            {
                attrName = args[ndx].toLowerCase();
                attrValue = args[ndx + 1];

                gTagAttrs[attrName] = attrValue;

                if ( ("postdomevents" == attrName) && (attrValue.toLowerCase() != "false") )
                {
                    gQTEventsEnabled = true;
                    if ( _QTIsMSIE() )
                        gTagAttrs["obj#style"] = "behavior:url(#" + gQTBehaviorID + ")";
                }
            }

            // init both tags with the required and "special" attributes
            var objTag =  '<object '
                            + _QTAddObjectAttr("classid")
                            + _QTAddObjectAttr("width")
                            + _QTAddObjectAttr("height")
                            + _QTAddObjectAttr("codebase")
                            + _QTAddObjectAttr("name")
                            + _QTAddObjectAttr("id")
                            + _QTAddObjectAttr("tabindex")
                            + _QTAddObjectAttr("hspace")
                            + _QTAddObjectAttr("vspace")
                            + _QTAddObjectAttr("border")
                            + _QTAddObjectAttr("align")
                            + _QTAddObjectAttr("class")
                            + _QTAddObjectAttr("title")
                            + _QTAddObjectAttr("accesskey")
                            + _QTAddObjectAttr("noexternaldata")
                            + _QTAddObjectAttr("obj#style")
                            + '>'
                            + _QTAddObjectParam("src", generateXHTML);
            var embedTag = '<embed '
                            + _QTAddEmbedAttr("src")
                            + _QTAddEmbedAttr("width")
                            + _QTAddEmbedAttr("height")
                            + _QTAddEmbedAttr("pluginspage")
                            + _QTAddEmbedAttr("name")
                            + _QTAddEmbedAttr("id")
                            + _QTAddEmbedAttr("align")
                            + _QTAddEmbedAttr("tabindex");

            // delete the attributes/params we have already added
            _QTDeleteTagAttrs("src","width","height","pluginspage","classid","codebase","name","tabindex",
                            "hspace","vspace","border","align","noexternaldata","class","title","accesskey","id","style");

            // and finally, add all of the remaining attributes to the embed and object
            for ( var attrName in gTagAttrs )
            {
                attrValue = gTagAttrs[attrName];
                if ( null != attrValue )
                {
                    embedTag += _QTAddEmbedAttr(attrName);
                    objTag += _QTAddObjectParam(attrName, generateXHTML);
                }
            }

            // end both tags, we're done
            return objTag + embedTag + '></em' + 'bed></ob' + 'ject' + '>';
        }


        // return the object/embed as a string
        function QT_GenerateOBJECTText()
        {
            var	txt = _QTGenerate("QT_GenerateOBJECTText", false, arguments);
            if ( _QTShouldInsertBehavior() )
                txt = _QTGenerateBehavior() + txt;
            return txt;
        }

        function QT_GenerateOBJECTText_XHTML()
        {
            var	txt = _QTGenerate("QT_GenerateOBJECTText_XHTML", true, arguments);
            if ( _QTShouldInsertBehavior() )
                txt = _QTGenerateBehavior() + txt;
            return txt;
        }

        function QT_WriteOBJECT()
        {
            var	txt = _QTGenerate("QT_WriteOBJECT", false, arguments);
            if ( _QTShouldInsertBehavior() )
                document.writeln(_QTGenerateBehavior());
            document.writeln(txt);
        }

        function QT_WriteOBJECT_XHTML()
        {
            var	txt = _QTGenerate("QT_WriteOBJECT_XHTML", true, arguments);
            if ( _QTShouldInsertBehavior() )
                document.writeln(_QTGenerateBehavior());
            document.writeln(txt);
        }

        function QT_GenerateBehaviorOBJECT()
        {
            return _QTGenerateBehavior();
        }

        function QT_ReplaceElementContents()
        {
            var element = arguments[0];
            var args = [];

            // copy all other arguments we want to pass through to the fcn
            for ( var ndx = 1; ndx < arguments.length; ndx++ )
                args.push(arguments[ndx]);

            var	txt = _QTGenerate("QT_ReplaceElementContents", false, args);
            if ( txt.length > 0 )
                element.innerHTML = txt;
        }


        function QT_ReplaceElementContents_XHTML()
        {
            var element = arguments[0];
            var args = [];

            // copy all other arguments we want to pass through to the fcn
            for ( var ndx = 1; ndx < arguments.length; ndx++ )
                args.push(arguments[ndx]);

            var	txt = _QTGenerate("QT_ReplaceElementContents_XHTML", true, args);
            if ( txt.length > 0 )
                element.innerHTML = txt;
        }