/*
* 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  = 1.0;

function AC_QuickTimeVersion() { return gQTGeneratorVersion; }

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

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 + '\n';
}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 Array();
gTagAttrs["src"] = args[0];
gTagAttrs["width"] = args[1];
gTagAttrs["height"] = args[2];
gTagAttrs["classid"] = "clsid:02BF25D5-8C17-4B23-BC80-D3488ABDDC6B";
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 = "6,0,2,0";
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];
// "name" and "id" should have the same value, the former goes in the embed and the later goes in
//  the object. use one array slot
if ( "name" == attrName || "id" == attrName )
gTagAttrs["name"] = attrValue;
else
gTagAttrs[attrName] = attrValue;
}

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

// 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>\n</ob' + 'ject' + '>';
}

// return the object/embed as a string
function QT_GenerateOBJECTText()
{
return _QTGenerate("QT_GenerateOBJECTText", false, arguments);
}

function QT_GenerateOBJECTText_XHTML()
{
return _QTGenerate("QT_GenerateOBJECTText_XHTML", true, arguments);
}

function QT_WriteOBJECT()
{
document.writeln(_QTGenerate("QT_WriteOBJECT", false, arguments));
}

function QT_WriteOBJECT_XHTML()
{
document.writeln(_QTGenerate("QT_WriteOBJECT_XHTML", true, arguments));
}