132252 - multilined <img> alt/title attribute

Status: VERIFIED DUPLICATE of bug 67127

(SeaMonkey :: General, defect)

Description

[greg]

If you insert *real* linefeeds in the alt attribute of the img tag, ie (6 afai 
tested) will display it on multiple lines. That is probably not wanted 
behaviour anyway, but the problem is that when that happens, Mozilla displays 
strange square where those linefeeds are, and if the file was edited in dos 
environment, you also get a note icon(yes, the musical thingie) with those 
squares... (due to \n\l or something i guess)
See attached file.

Comment 1

[greg]

Attachment: testcase html file

Comment 2

[Russell Odom]

Confirming W2K 2002031104: I see strange characters in the place of newlines in
the tooltips for the images with title attributes. In the case of the broken
image, I see the alt text on one line, which I think is correct behaviour.

http://www.w3.org/TR/html4/types.html#type-cdata sez:
User agents should interpret attribute values as follows: [...] Ignore line feeds

Therefore, I think these newlines not be shown. For 'nice' behaviour, they
should be replaced with a space, otherwise we'll get things like 'hellothis isa
test'.

Severity -> minor, though.

harishd, moied, should the component be Parser?

Can anyone confirm this on a non-Windows system? If so, please change Platform
and OS accordingly.

I've just tried it in IE5.5 and it shows newlines as newlines in both tooltips
and the placeholder for the missing image - not that this is necessarily the
correct behaviour :-)

Comment 3

[Nick Kocharhook]

0.9.9 on Mac OS X is exhibiting this behavior as well. (I cannot change the
platform, however.) The newline characters look to me like the delete characters
on old IBM electric typewriters. Quite odd. :-)

Is there any particular reason we need to prevent users from providing
multi-line title attributes?

Comment 4

[Nick Kocharhook]

If only I had waited. :-)

HTML 4.01 says that in this case we should:

  o Replace character entities with characters,
  o Ignore line feeds,
  o Replace each carriage return or tab with a single space.

http://www.w3.org/TR/html4/types.html#type-cdata

Comment 5

[Christopher Aillon (sabbatical, not receiving bugmail)]

*** This bug has been marked as a duplicate of 67127 ***

Comment 6

[:deanis74]

v