* lisp-font-lock-syntactic-face-function
@ 2005-05-18 9:11 martin rudalics
2005-05-18 23:49 ` lisp-font-lock-syntactic-face-function Stefan Monnier
0 siblings, 1 reply; 6+ messages in thread
From: martin rudalics @ 2005-05-18 9:11 UTC (permalink / raw)
In `lisp-font-lock-syntactic-face-function' the expression
(eq n (or (get sym 'doc-string-elt) 3))
causes to paint _every_ third string subexpression of a top-level
expression with `font-lock-doc-face'. That's annoying in a number of
cases like, for example, `define-abbrev'. Why not simplify this to
(eq n (get sym 'doc-string-elt))
and provide the necessary additional doc-string-elts like,
(put 'defgroup 'doc-string-elt 3)
(put 'defface 'doc-string-elt 3)
(put 'defalias 'doc-string-elt 3)
(put 'defvaralias 'doc-string-elt 3)
(put 'define-obsolete-function-alias 'doc-string-elt 4)
(put 'define-obsolete-variable-alias 'doc-string-elt 4)
(put 'defimage 'doc-string-elt 3)
(put 'define-category 'doc-string-elt 2)
(put 'define-widget 'doc-string-elt 3)
Also, the while loop in `lisp-font-lock-syntactic-face-function' seems
overly expensive: For example, any top-level expression terminating with
a string requires to backward-sexp from the start of the string to the
start of the expression just to find out that the string is not a
doc-string.
I tried the following with the puts from above and encountered no
problems so far:
(defun lisp-font-lock-syntactic-face-function (state)
(if (nth 3 state)
(if (and (eq (nth 0 state) 1)
(nth 1 state) ; is this needed ???
(save-excursion
(let* ((from (1+ (nth 1 state))) ; is 1+ OK here ???
(sym (intern-soft
(buffer-substring
from
(progn
(goto-char from) (forward-sexp 1) (point)))))
(doc-string-elt (get sym 'doc-string-elt)))
(and (numberp doc-string-elt) ; check for > 0 too ???
(condition-case nil
(progn
(forward-sexp (1- doc-string-elt))
(forward-comment (buffer-size))
;; the last two lines could be replaced by:
;; (forward-sexp doc-string-elt)
;; (backward-sexp)
(= (point) (nth 8 state)))
(scan-error nil))))))
font-lock-doc-face
font-lock-string-face)
font-lock-comment-face))
^ permalink raw reply [flat|nested] 6+ messages in thread* Re: lisp-font-lock-syntactic-face-function
2005-05-18 9:11 lisp-font-lock-syntactic-face-function martin rudalics
@ 2005-05-18 23:49 ` Stefan Monnier
2005-10-21 8:05 ` lisp-font-lock-syntactic-face-function martin rudalics
0 siblings, 1 reply; 6+ messages in thread
From: Stefan Monnier @ 2005-05-18 23:49 UTC (permalink / raw)
Cc: emacs-devel
> In `lisp-font-lock-syntactic-face-function' the expression
> (eq n (or (get sym 'doc-string-elt) 3))
> causes to paint _every_ third string subexpression of a top-level
> expression with `font-lock-doc-face'. That's annoying in a number of
> cases like, for example, `define-abbrev'. Why not simplify this to
> (eq n (get sym 'doc-string-elt))
> and provide the necessary additional doc-string-elts like,
> (put 'defgroup 'doc-string-elt 3)
> (put 'defface 'doc-string-elt 3)
> (put 'defalias 'doc-string-elt 3)
> (put 'defvaralias 'doc-string-elt 3)
> (put 'define-obsolete-function-alias 'doc-string-elt 4)
> (put 'define-obsolete-variable-alias 'doc-string-elt 4)
> (put 'defimage 'doc-string-elt 3)
> (put 'define-category 'doc-string-elt 2)
> (put 'define-widget 'doc-string-elt 3)
[ I wrote the code ]
I have no opinion on this.
> Also, the while loop in `lisp-font-lock-syntactic-face-function' seems
> overly expensive: For example, any top-level expression terminating with
> a string requires to backward-sexp from the start of the string to the
> start of the expression just to find out that the string is not a
> doc-string.
> I tried the following with the puts from above and encountered no
> problems so far:
> (defun lisp-font-lock-syntactic-face-function (state)
> (if (nth 3 state)
> (if (and (eq (nth 0 state) 1)
> (nth 1 state) ; is this needed ???
> (save-excursion
> (let* ((from (1+ (nth 1 state))) ; is 1+ OK here ???
> (sym (intern-soft
> (buffer-substring
> from
> (progn
> (goto-char from) (forward-sexp 1) (point)))))
> (doc-string-elt (get sym 'doc-string-elt)))
> (and (numberp doc-string-elt) ; check for > 0 too ???
> (condition-case nil
> (progn
> (forward-sexp (1- doc-string-elt))
> (forward-comment (buffer-size))
> ;; the last two lines could be replaced by:
> ;; (forward-sexp doc-string-elt)
> ;; (backward-sexp)
> (= (point) (nth 8 state)))
> (scan-error nil))))))
> font-lock-doc-face
> font-lock-string-face)
> font-lock-comment-face))
I don't have time to look into it in detail, but the approach looks fine.
Stefan
^ permalink raw reply [flat|nested] 6+ messages in thread* Re: lisp-font-lock-syntactic-face-function
2005-05-18 23:49 ` lisp-font-lock-syntactic-face-function Stefan Monnier
@ 2005-10-21 8:05 ` martin rudalics
2005-10-24 16:48 ` lisp-font-lock-syntactic-face-function Stefan Monnier
0 siblings, 1 reply; 6+ messages in thread
From: martin rudalics @ 2005-10-21 8:05 UTC (permalink / raw)
Cc: emacs-devel
Thanks for the careful revision. However, a number of doc-strings don't
get highlighted properly anymore due to the "Don't mark as docstring the
3rd elem of an unknown toplevel form" change - among them those for
`defface' and `defalias'. I earlier proposed to add
(put 'defadvice 'doc-string-elt 3)
(put 'defgroup 'doc-string-elt 3)
(put 'defface 'doc-string-elt 3)
(put 'defalias 'doc-string-elt 3)
(put 'defvaralias 'doc-string-elt 3)
(put 'define-obsolete-function-alias 'doc-string-elt 4)
(put 'define-obsolete-variable-alias 'doc-string-elt 4)
(put 'defimage 'doc-string-elt 3)
(put 'define-category 'doc-string-elt 2)
(put 'define-widget 'doc-string-elt 3)
Maybe this is the moment to do that. You might also consider replacing
the remaining (nth 8 state) with `startpos'.
^ permalink raw reply [flat|nested] 6+ messages in thread
end of thread, other threads:[~2005-11-21 0:02 UTC | newest]
Thread overview: 6+ messages (download: mbox.gz follow: Atom feed
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2005-05-18 9:11 lisp-font-lock-syntactic-face-function martin rudalics
2005-05-18 23:49 ` lisp-font-lock-syntactic-face-function Stefan Monnier
2005-10-21 8:05 ` lisp-font-lock-syntactic-face-function martin rudalics
2005-10-24 16:48 ` lisp-font-lock-syntactic-face-function Stefan Monnier
2005-11-18 10:49 ` lisp-font-lock-syntactic-face-function martin rudalics
2005-11-21 0:02 ` lisp-font-lock-syntactic-face-function Stefan Monnier
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