[ tidy-Bugs-1604555 ] PRE block reordering produces visually different output

Bugs item #1604555, was opened at 2006-11-28 17:18
Message generated for change (Comment added) made by hoehrmann
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Category: HTML/XHTML Parser
Group: None
Status: Open
Resolution: None
Priority: 5
Private: No
Submitted By: Christopher M. Woods (cmwoods)
Assigned to: Nobody/Anonymous (nobody)
Summary: PRE block reordering produces visually different output

Initial Comment:
I've stumbled onto a situation in which Tidying an HTML file (of which I have 
no control) is producing output that renders visually inconsistent when 
compared to the input document.

It appears that Tidy is taking:

...
<PRE>
<DIV>
Content Data               Spaced Data
</DIV>
</PRE>

and rearranging it to be:

<DIV>
Content Data               Spaced Data
</DIV>
<PRE>

</PRE>

For both MSIE (7.0) and Firefox (2.0) are in agreement with how they render 
these two snippets.  The "Content Data" block in the former appears as being 
within the PRE block (courier new, 10pt, whitespace maintained); in the latter 
it appears as being within a DIV block (default font, 16pt, whitespace 
compressed).

At first glance, it appears that these browsers are discarding the DIV.  
However more extensive testing will be needed in order to determine if it is 
completely discarded, just moved as an empty block, or whether the block 
actually remains (but that the browsers override the properties as needed).

I've attached a sample with input, output, log, and tree representation.

----------------------------------------------------------------------

>Comment By: Björn Höhrmann (hoehrmann)
Date: 2007-05-25 05:46

Message:
Logged In: YES 
user_id=188003
Originator: NO

What do you suggest should Tidy's output look like?

----------------------------------------------------------------------

Comment By: Christopher M. Woods (cmwoods)
Date: 2006-12-06 18:03

Message:
Logged In: YES 
user_id=576763
Originator: YES

I just noticed that Sourceforge removed the extra whitespace in my bug
report that was supposed to appear between the "Content Data" and the
"Spaced Data".  This was supposed to show that the issue is resulting in
the loss of significant whitespace of a pre-formatted block due to the fact
that the enclosed DIV is being moved to _before_ the PRE.



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