Bug 86682 – <embed> and <object> width and height do not interact properly

• Status: NEW
• Component: Layout and Rendering

[Robert Hogan]

Reduction:

   <OBJECT classid>
   <PARAM NAME=movie VALUE="eat.swf"> <PARAM NAME=menu VALUE=false> <PARAM  NAME=quality VALUE=high> <PARAM NAME=bgcolor VALUE=#231f1c> <EMBED src="eat.swf" menu=false quality=high bgcolor=#231f1c  WIDTH="100" HEIGHT="180" NAME="eat" ALIGN=""
 TYPE="application/x-shockwave-flash" PLUGINSPAGE="http://www.macromedia.com/go/getflashplayer"></EMBED>
    </OBJECT>
​
See also https://bugs.webkit.org/show_bug.cgi?id=17688#add_comment

[Robert Hogan]

http://www.whatwg.org/specs/web-apps/current-work/#the-embed-element

[Robert Hogan]

The culprit seems to be:

<object><PARAM NAME=movie VALUE="eat.swf">

Specifying a source for the object element results in the dimensions for the embedded object getting ignored.

[Robert Hogan]

If you try this reduction you can see different results for Opera/FF/IE8 vs WebKit: http://jsfiddle.net/yZ6zV/

HTMLObjectElement::parametersForPlugin() special-cases 'movie' as a PARAM NAME and attempts to load the value passed to it - it looks like no other browser does this. It's done for 'compatibility' - presumably with WebKit-apps rather than other browsers.

Adobe says that flash requires a width and height parameter in the OBJECT element and these are missing in the site reporting the issue (http://helpx.adobe.com/flash/kb/flash-object-embed-tag-attributes.html).

So this looks like a combination of WebKit-specific behaviour and invalid code from the reporter.

Is the bug invalid?