169512 - object tag doesn't return width or height when displaying image

Status: RESOLVED INVALID

(Core :: DOM: Core & HTML, defect, P3)

Description

[Neil Marshall]

If I use an <object> tag to display an image and I try to read the width and
height, I just get an empty string.  When I do the exact same thing with an
<img> tag I get the actual width and height of the image, even if it wasn't
specified.

Comment 1

[Neil Marshall]

Attachment: Displays the width and height of an img image and an object image.

Comment 2

[Boris Zbarsky [:bzbarsky]]

I suspect the only reason that .height/.width on image reflects the "actual"
size instead of the attr is for DOM0 reasons....

In any case, making <object> and <img> use the same code here would not be too
hard if we decided we want it.

Comment 3

[Sivakiran Tummala]

http://mozilla.org/quality/ngdriver/suites/dom-html/hobj017.html is a testcase
which sets the height and tries to read the value, It is working fine.

Boris,
you added the qawanted keyword, what are you expecting from QA.

Comment 4

[Boris Zbarsky [:bzbarsky]]

The point is, for images you can read the "displayed height" without setting the
value manually.

I'm expecting an evaluation of what the spec says on this issue and what our
behavior should be....

Comment 5

[Sivakiran Tummala]

Object is a generic element and can be used for specific elements like "img,
applet, iframe". So i think "object" should have the same behaviour as an
img|applet|iframe.

Comment 6

[Boris Zbarsky [:bzbarsky]]

Well, those three are inconsistent in how they treat the width/height
properties, as far as I can tell.

Comment 7

[Sivakiran Tummala]

Well, object element being generic of those three elements, it should be
consistant across all these elements.

Comment 8

[Johnny Stenback (:jst)]

Mass-reassigning bugs.

Comment 9

[Boris Zbarsky [:bzbarsky]]

Taking this so I can keep track of this.  I have sent mail to [e-mail]
requesting clarification (which is what I was requesting QA do, as it
happens.... see comment 4)

Comment 10

[Boris Zbarsky [:bzbarsky]]

This could use a testcase that compares with IE behavior (the testcase at
http://mozilla.org/quality/ngdriver/suites/dom-html/hobj017.html makes IE barf).

Comment 11

[Christian :Biesinger (don't email me, ping me on IRC)]

actually... that url works in my ie (tested using 6.0sp1), it gives the expected
result

what does make ie barf for me is the attachment to this bug

Comment 12

[Boris Zbarsky [:bzbarsky]]

> it gives the expected result

Oh, right.  That one actually sets the values... so it's not very useful for
this bug.

Comment 13

[Boris Zbarsky [:bzbarsky]]

OK, I see no reason to change our behavior, since it follows the DOM spec and IE
apparently has the same behavior we do.  So....