206229 - <span> handled differently than other inline elements when overlapped

Status: RESOLVED WONTFIX

(Core :: DOM: HTML Parser, enhancement)

Description

[Ernest Cline]

User-Agent:       Mozilla/5.0 (Windows; U; Win98; en-US; rv:1.3.1) Gecko/20030425
Build Identifier: Mozilla/5.0 (Windows; U; Win98; en-US; rv:1.3.1) Gecko/20030425

I was playing around with some invalid HTML to see what Mozilla would make of
it.  I tried the following:
 <div>
  T <b>T <i>T <span>T <u>T</b> T</i> T </span> T</u> T
 </div>
The effect of <span> was terminated by the </b> altho <i> and <u> were not.
Granted, this is invlaid HTML, but it would seem to me that <span> should be
treated the same as <b> and <i> when trying to parse this. As a point of
comparison, IE treats <span> the same as the other inline elements in this case,
continuing the effect of <span> until </span> is encountered.

Since this is dealing with invalid HTML, I can't argue that what Mozilla is
doing is wrong, only that it is inconsistent and and that it is different from
how IE handles it.

Reproducible: Always

Steps to Reproduce:
1. Create an example HTML document with overlaping inline elements.
2. Display it in the browser.

Actual Results:  
Mozilla parsed the given example as if it had been the following valid HTML:
<div>
 T <b>T <i>T <span>T <u>T</u></span></i></b><i><u> T</u></i><u> T T</u> T
</div>

Expected Results:  
Mozilla should parse the example as if were the following valid HTML:
<div>
 T <b>T <i>T <span>T <u>T</u></span></i></b><i><span><u>
 T</u></span></i><span><u> T</u></span></u> T</u> T
</div>

Comment 1

[Christopher Hoess (gone)]

AFAIK, that's intentional; "residual style" is/was intended only for
presentational elements, so that people trying to wrap blocks in <font>, <b>,
etc. would still get that styling. I think this is WONTFIX; harish?

Comment 2

[Mark R. Bannister]

Attachment: simplified testcase

Re-tested Mozilla 1.8a2 build 2004062508 on WinME this is still a problem. 
Testcase attached.  Needs decision whether to fix this behaviour to be
consistent or not.

Comment 3

[Mark R. Bannister]

Changing status to NEW.

Comment 4

[William Wang]

<span style="background-color:green;">
<img src="http://img.photobucket.com/albums/v448/sunose/small_world_nature_4.gif">
</span>

IE 6.01 render is expect. but FireFox 1.0 (include PR,rc1) render is not expect.

because the gif is transparence format picture.

so is this a bug?

Comment 5

[Henri Sivonen (:hsivonen)]

WONTFIXing per HTML5. If you disagree, please file a bug against the HTML5 spec in W3C's Bugzilla and cite sites that need <span> to behave like <font>.