38088 - <?xml-stylesheet?> PI not recognized

Status: VERIFIED DUPLICATE of bug 48351

(Core :: XML, defect, P3)

Description

[sytobinh]

I am using build 050111.  When I used <link rel=..> the associated stylesheet is
used.  However, when I use <?xml-stylesheet href=...> nothing happens.  This
used to work, but I'm not sure when it stopped.

Comment 1

[David Baron :dbaron: (⌚️UTC-4, no longer working on Mozilla)]

Do you have a testcase?  Was the file being served as HTML or XML?

Comment 2

[sytobinh]

Some additional info.  
What is happening is that the <?xml-stylesheet?> PI is only recognized if the
document has an <?xml?> declaration at the beginning.  However, if you have the
<?xml?> declaration, then Mozilla wants a style for each element.  
What I want to do is include a stylesheet in and XHTML document via the
<?xml-stylesheet?> PI.  Currently, this is impossible in Mozilla.  

Comment 3

[David Baron :dbaron: (⌚️UTC-4, no longer working on Mozilla)]

I've done many times the things that you say don't work, so you're going to have
to provide more detail.  I've used xml-stylesheet PIs (in documents served as
text/xml, not text/html), and I've used the styles from the UA stylesheet in XML
documents (via namespaces).  Do you have a testcase that demonstrates this bug? 
I suspect what you're seeing is with a file on your hard disk, where the browser
has to (well, it doesn't always have to, but I think it does??) guess the
content type.  An XML document needs to use namespaces to use HTML elements, and
xml-stylesheet won't work in HTML documents.

Comment 4

[sytobinh]

As I have discoved, the bug I am really reporting is not that well described.
In order to use <?xml-stylesheet?> you have to have <?xml?>.  However, if you
have <?xml?> then Mozilla won't render it as HTML (even if it is declared as
XHTML).  I think the correct solution would be if Mozilla, upon looking at the
doctype, realized that these documents were HTML, despite also being XML,
and then used its tools (which work just fine) to process it.  This is really
a recognition bug.

Comment 5

[David Baron :dbaron: (⌚️UTC-4, no longer working on Mozilla)]

Do you have a testcase?  As what MIME type are the files sent (or, if off a
local disk, what extension is used)?

Comment 6

[sytobinh]

Sorry about not responding.
Here's a good example.  At the XML Schema Checker at http://cgi.w3.org/cgi-bin/xmlschema-check-new
there is an option to return XML as MIME type text/plain.  Now, Mozilla
ignores this MIME type (in fact, it recently seems to refuse to
display most text files) and just outputs some element text.  It does
this because the document begins with <?xml version='1.0'?>.  I think
that Mozilla should look at the document, and if it is HTML or has
a full stylesheet render it, otherwise display as text.

Comment 7

[David Baron :dbaron: (⌚️UTC-4, no longer working on Mozilla)]

If a file is sent as text/plain, it should be displayed as text.

But what does that have to do with this bug, which is about the xml-stylesheet
PI?  Do you have a testcase for the xml-stylesheet PI not working?  Or is the
bug different from the original description?

Comment 8

[sytobinh]

Here's the problem.  <?xml-stylesheet?> doesn't work unless you have <?xml?>
(which is incorrect behavior, <?xml?> is optional). But if you include <?xml?>
mozilla goes into XML display mode, which means that (1) it won't render the
document as HTML (even when it is declared HTML).  (2) if it is some sort of XML
Mozilla does not recognize it doesn't display at all, unless there is a
stylesheet sufficent to display it.

What should happen is that if a document is HTML (with appropriate DOCTYPE and
all) it should be rendered as HTML, and use <?xml-stylesheet?>.  If it is not
recognized XML, and has no stylesheet, it should display the text of the document.

Comment 9

[Blake Ross]

David, you seem to know the most about this.  Can you respond to the reporter's 
last comment?

Comment 10

[Hixie (not reading bugmail)]

[e-mail]: Please use the "Create a new attachment" link above to 
add a testcase to this bug report. The testcase should clearly show the problem
that occurs. We cannot fix the bug unless we have a testcase.

Comment 11

[David Baron :dbaron: (⌚️UTC-4, no longer working on Mozilla)]

Is the document being served as text/html or text/xml?

Comment 12

[Andreas Franke (gone)]

[e-mail]: Is this still a problem? Build 050111 is rather old right
now, and a better handling for strict dtds has been incoporated into mozilla. If
this problem is solved, please close this bug (e.g. as fixed or worksforme).
Thanks.

Comment 13

[Eliot Landrum]

I'm getting weird behaviour in Linux 2000070308. I'm attaching four testcases to
illustrate.

Here's what Mozilla does for each:

Test 1 (uses <link />, no <?xml?> prolog) - renders correctly
Test 2 (uses <link />, <?xml?> prolog) - renders correctly
Test 3 (uses <?xml-stylesheet?>, no <?xml?> prolog) - does not load
stylesheet
Test 4 (uses <?xml-stylesheet?>, <?xml?> prolog) - does not load
stylesheet

Hmm, ok, from those results, it looks like Moz doesn't even understand
<?xml-stylesheet?>. Did I do something wrong? The http://w3.org validator
says I'm good and the "<a
href="http://www.w3.org/TR/xml-stylesheet/">Associating Style Sheets with XML
documents</a>" doc says I'm good.

About to attach the four test cases. All are available from
http://eliot.landrum.cx/mozilla/38088/

Comment 14

[Eliot Landrum]

Attachment: Test 1 - <link />, no <?xml?>

Comment 15

[Eliot Landrum]

Attachment: Test 2 - <link />, <?xml?>

Comment 16

[Eliot Landrum]

Attachment: Test 3 - <?xml-stylesheet?>, no <?xml?>

Comment 17

[Eliot Landrum]

Attachment: Test 4 - <?xml-stylesheet?>, <?xml?>

Comment 18

[Eliot Landrum]

One last spam..

I told bugzilla to serve all of the testcases as text/html as it was never
specified otherwise by the reporter.

Reporter, [e-mail], please go through these testcases and let us
know your results and which of these cases describe your problem. If none, then
please attach one that does. We need this bug cleared out if you are not
interested in following up on it.

Comment 19

[David Baron :dbaron: (⌚️UTC-4, no longer working on Mozilla)]

Thanks for the testcases.  The behavior of those 4 cases is as I think it should
be.  Content sent as text/html should (IMO) be treated as HTML, not as XHTML.
The XHTML spec is useless for answering this question.

What happens if they're attached as "text/xml"?

Comment 20

[Eliot Landrum]

Attachment: Test 3 (text/xml)

Comment 21

[Eliot Landrum]

Attachment: Test 4 (text/xml)

Comment 22

[Eliot Landrum]

Ok, David.. the behaviour with these text/xml cases seems to be at least
consistant. Is it correct? If so, let's resolve as invalid.

Comment 23

[Eliot Landrum]

Marking invalid. Feel free to discuss further and possibly reopen if needed.

Comment 24

[David Baron :dbaron: (⌚️UTC-4, no longer working on Mozilla)]

Reopening from invalid...

Comment 25

[David Baron :dbaron: (⌚️UTC-4, no longer working on Mozilla)]

... and marking duplicate.

*** This bug has been marked as a duplicate of 48351 ***

Comment 26

[Christine Hoffman]

Adding keyword 'verifyme' to bug.

Comment 27

[Scott Brodmerkle]

Verified dupe.