font-lock-fontify-syntactically-region: could someone check?

font-lock-fontify-syntactically-region: could someone check?

[T. V. Raman]

Hi,

I'm seeing the following bug in conjunction with emacspeak, and
at this point  have almost convinced myself that it's not
emacspeak.

Could someone try the following test for me:

Create a file foo.tex 
with something like the following:

%this is a comment
This is not a comment 

and see if the second line (which is not a comment) gets

I find that in my environment, once font-lock finds a comment in
a .tex file, all lines following the comment get fontified as a
comment -- unless I set font-lock-keywords-only to t.

It's somewhat difficult for me to check this without emacspeak
loaded, since I'm  basically dead in the water if emacspeak isn't loaded.
fontified as a comment?
 Thanks, 
 --Raman

-- 
Best Regards,
--raman

      
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Re: font-lock-fontify-syntactically-region: could someone check?

[Miles Bader]

"T. V. Raman" <raman@users.sf.net> writes:
> %this is a comment
> This is not a comment 
>
> and see if the second line (which is not a comment) gets

Seems to work properly in my emacs (version 23, from CVS about 01-feb):

The first line is fontified as a comment, the second line is not.

-miles

-- 
"Don't just question authority,
Don't forget to question me."
-- Jello Biafra

Re: font-lock-fontify-syntactically-region: could someone check?

[Ralf Angeli]

* T. V. Raman (2007-02-25) writes:

> Could someone try the following test for me:
>
> Create a file foo.tex 
> with something like the following:
>
> %this is a comment
> This is not a comment 
>
> and see if the second line (which is not a comment) gets
> fontified as a comment?

With `emacs -Q' this is working correctly.

> It's somewhat difficult for me to check this without emacspeak
> loaded, since I'm  basically dead in the water if emacspeak isn't loaded.

What version of emacspeak are you using?  Older versions included a
buggy version of `regexp-opt'.

-- 
Ralf

Re: font-lock-fontify-syntactically-region: could someone check?

[T. V. Raman]

I'm using the version out of the Emacspeak svn repository --- and
the buggy regexp-opt was nuked a long time ago:-)

Incidentally the bug doesn't manifest itself in anything but the
tex derived modes, so I'm suspecting  there is bad interaction
between the tex-specific syntatic fontifier and emacspeak; the
bug does not happen in any of the other modes e.g. lisp, python,
perl, or c (or their derivatives).

I stepped through the code with debug-on-entry but got very
confused by the complexity in font-lock --- so I'm still at a
loss.

The bug shows up in vanilla tex-mode (i.e. the one that ships
with emacs 22), texinfo-mode -- as well as all modes provided by
auctex. (from comments in the auctex code, it looks like the
cloned and later adopted the syntactic fontifier from tex-mode.el)

>>>>> "Ralf" == Ralf Angeli <angeli@caeruleus.net> writes:
    Ralf> * T. V. Raman (2007-02-25) writes:
    >> Could someone try the following test for me:
    >> 
    >> Create a file foo.tex with something like the following:
    >> 
    >> %this is a comment This is not a comment
    >> 
    >> and see if the second line (which is not a comment) gets
    >> fontified as a comment?
    Ralf> 
    Ralf> With `emacs -Q' this is working correctly.
    Ralf> 
    >> It's somewhat difficult for me to check this without
    >> emacspeak loaded, since I'm basically dead in the water if
    >> emacspeak isn't loaded.
    Ralf> 
    Ralf> What version of emacspeak are you using?  Older
    Ralf> versions included a buggy version of `regexp-opt'.
    Ralf> 
    Ralf> -- Ralf

-- 
Best Regards,
--raman

      
Email:  raman@users.sf.net
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Re: font-lock-fontify-syntactically-region: could someone check?

[Ralf Angeli]

* T. V. Raman (2007-02-25) writes:

> I stepped through the code with debug-on-entry but got very
> confused by the complexity in font-lock --- so I'm still at a
> loss.
>
> The bug shows up in vanilla tex-mode (i.e. the one that ships
> with emacs 22), texinfo-mode -- as well as all modes provided by
> auctex. (from comments in the auctex code, it looks like the
> cloned and later adopted the syntactic fontifier from tex-mode.el)

emacspeak-advice.el contains the following code:

(add-hook 'text-mode-hook
          (function (lambda ()
                      (modify-syntax-entry 10 " "))))

In TeX-related modes a newline is considered the end of a comment.
The code above sets its syntax to whitespace, though.  Like this no
comment end can be found.

-- 
Ralf

Re: font-lock-fontify-syntactically-region: could someone check?

[T. V. Raman]

Yes, I think this is it.

Thanks for catching it for me -- I was looking in all the wrong places.

>>>>> "Ralf" == Ralf Angeli <angeli@caeruleus.net> writes:
    Ralf> * T. V. Raman (2007-02-25) writes:
    >> I stepped through the code with debug-on-entry but got
    >> very confused by the complexity in font-lock --- so I'm
    >> still at a loss.
    >> 
    >> The bug shows up in vanilla tex-mode (i.e. the one that
    >> ships with emacs 22), texinfo-mode -- as well as all modes
    >> provided by auctex. (from comments in the auctex code, it
    >> looks like the cloned and later adopted the syntactic
    >> fontifier from tex-mode.el)
    Ralf> 
    Ralf> emacspeak-advice.el contains the following code:
    Ralf> 
    Ralf> (add-hook 'text-mode-hook (function (lambda ()
    Ralf> (modify-syntax-entry 10 " "))))
    Ralf> 
    Ralf> In TeX-related modes a newline is considered the end of
    Ralf> a comment.  The code above sets its syntax to
    Ralf> whitespace, though.  Like this no comment end can be
    Ralf> found.
    Ralf> 
    Ralf> -- Ralf

-- 
Best Regards,
--raman

      
Email:  raman@users.sf.net
WWW:    http://emacspeak.sf.net/raman/
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