Re: Colorizing

Hello!

>>>>> "PF" == Peter Flynn <[email protected]> writes:

    PF> D. D. Brierton wrote:
    >> On Tue, 2002-11-26 at 19:04, Artiom Neganov wrote:

    AN> In short, when colorizing will work in Emacs? :)

    PF> [...]

    DDB> I can't help agreeing that syntax highlighting could be much
    DDB> improved in PSGML. It is also a regularly requested
    DDB> feature. Is it hard to do?

    PF> I don't understand the problem. Syntactic fontification
    PF> (colorizing) I thought is ALREADY IN the major modes (psgml,
    PF> xxml, xslide, etc).

    PF> Maybe the OP's question was really "how do I turn it on", not
    PF> "has anyone ever implemented it". In fact, looking at the
    PF> wording "when colorizing will work" (aside from the inversion)
    PF> I think the answer is actually:

    PF> Add the following to your .emacs file:

    PF>               (require 'font-lock) (global-font-lock-mode t)
    PF> (setq font-lock-maximum-decoration t) (turn-on-font-lock)

You should be able to set something like that via the Options menu,
too.


    PF> I can't guarantee it will work because I don't understand
    PF> Elisp, but that's what's in my .emacs, and I get color.


If you want to go deeper, I recommend Markus Hoenicka's 'SGML Tools
under Windows NT' page (which is a slight misnomer, as it starts out
by installing CygWin ;-).  The section on psgml explains how to set up
and customize font-locking:

http://ourworld.compuserve.com/homepages/hoenicka_markus/cygx646.html

(take the 'cygx646.html' part with a grain of salt; Markus seems to
have worked on this since I last visited the site.)


This, however, does not highlight attributes.  For this, I have added
the following (simplistic) bits:

......................................................................
(defvar i3-xml-font-lock-keywords
  (list
   '(" \\([^> ]+\\) *=" 1 font-lock-variable-name-face t)
   '("=[ \t\n]*\\(\"[^\"]+\"\\)" 1 font-lock-string-face t)
   )
  "Additional expressions to highlight in XML mode.
Remotely based on the one for psgml-html, basically an extended
version of attribute definitions.  The remainder is fontified by psgml
itself.  See `sgml-markup-faces' and `sgml-set-face'.")


(defun sgml-activate-syntax-highlighting ()
  "Activate syntax highlighting based on psgml parsing.

This is a general configuration function intended to abstract from all
that setup business.  It is not intended to be called from mode hooks.

This is based on
http://ourworld.compuserve.com/homepages/hoenicka_markus/cygx646.html,
Step 6, \"Enable syntax coloring\", which is based on code by David
Megginson.  Edited to be more minimal and integrated into the general
font-locking mechanism."
  (interactive)

  ;; In sgml documents, parse dtd immediately to allow immediate
  ;; syntax coloring.  Off by default.
  (setq sgml-auto-activate-dtd t)

  ;; Actually have syntax coloring applied by psgml.
  (setq-default sgml-set-face t)

  (put 'xml-mode  'font-lock-defaults '(i3-xml-font-lock-keywords nil t))
  ;; So it's not really SGML font-locking --- watch me care.
  (put 'sgml-mode 'font-lock-defaults '(i3-xml-font-lock-keywords nil t))
  )
......................................................................

(I recommend you play around a little with
sgml-activate-syntax-highlighting, commenting out s-expressions one by
one to see wether it does anything useful for you.)

You'll notice soon that this simplistic font-locking is very
nonperfect.  Things like

  <!-- ======================= -->

while not really uncommon, look a bit funny.  But I'm reluctant to
play around with the font-locking regexps, as they do tend to eat up
enough startup time already.


HTH,

-- 
Felix H. Gatzemeier                   [email protected]
Office Phone: (0(049)241)80-21313
Disclaimer: I do not speak for anyone but myself.
Please do not send me mails containing documents in proprietary
formats (such as Microsoft Word) unless you really need to.


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