18403 - Rendering Engine: font and hr

Status: VERIFIED DUPLICATE of bug 991

(Core :: Layout, defect, P3)

Description

[Neil Conway]

Sorry for the bad title, this is difficult to describe.

The following HTML is rendered incorrectly by Seamonkey Nov/08/99 on Linux and
Nov/07/99 on Windows 98.

<FONT color=red>
<FONT color=green>(1)Some green text</FONT>
<HR>
(2)Some red text, which can't be highlighted by the mouse<P>
(3)Some text that should be red, but isn't</P>
</font>

The (1) is rendered correctly, and can be hightlighted. (2) is rendered visably
correct, but can't be highlighted by the mouse. (3) has no formatting, but can
be highlighted.

When you remove the <hr>, the 2nd block of text can be hightlighted correctly,
but the 3rd block still has no formatting.

For a real-life example of this, see any message in any "Ultimate Bulletin
Board", such as http://forum.arstechnica.com.

Comment 1

[Sean Richardson]

Attachment: Reporter's reduced testcase as an attachment

Comment 2

[Sean Richardson]

Confirmed with 1999-11-08-09-M11 nightly binary on Windows NT.

Added an attachment for the reporter's simplified testcase.
Removing the <HR> from the testcase makes the (2) text highlightable,
but the lack of colour in (3) remains.

Note that the <HR> element is a block-level element and <FONT> elements cannot
span blocks, so really the <FONT> element should be closed before the <HR>
and a new <FONT> element opened after. Testing... with that modification, the
(2) text can be highlighted. (Without the modification, the real question is
why (2) is red at all.)

The HTML 4 spec is uninformative about what can be expected for <FONT> as
it is completely deprecated:
<URL:http://www.w3.org/TR/REC-html40/present/graphics.html#h-15.2.2>

OTOH, the attachment has an HTML 3.2 DOCTYPE purposefully...
OTO,OH, <HR> has always been a block-level element...

Not sure that the testcase was ever valid html - is this INVALID?

Comment 3

[rickg]

There is certainly a residual style bug here. Harish, please check out the HR
issue.

Comment 4

[harishd]

*** This bug has been marked as a duplicate of 991 ***

Comment 5

[Chris Petersen]

Agreed. Marking as verified dup of 991.

Comment 6

[Heikki Toivonen (remove -bugzilla when emailing directly)]

SPAM. HTML Element component deprecated, changing component to Layout. See bug
88132 for details.