From: Noam Postavsky <npostavs@gmail.com>
To: Vincent Lefevre <vincent@vinc17.net>
Cc: Stefan Monnier <monnier@iro.umontreal.ca>, 33887@debbugs.gnu.org
Subject: bug#33887: 26.1; Emacs hangs for several seconds when going to the end of an XML file in nXML mode
Date: Mon, 27 May 2019 08:02:18 -0400 [thread overview]
Message-ID: <87y32s6r79.fsf@gmail.com> (raw)
In-Reply-To: <20190527091850.GA5676@zira.vinc17.org> (Vincent Lefevre's message of "Mon, 27 May 2019 11:18:50 +0200")
[-- Attachment #1: Type: text/plain, Size: 864 bytes --]
Vincent Lefevre <vincent@vinc17.net> writes:
> On 2019-05-26 18:17:55 -0400, Noam Postavsky wrote:
>> And about the highlighting of quoted text outside tags, we can just
>> disable fontification, while leaving the syntax code untouched:
> [...]
>
> I've applied it with a minor change against Emacs 26 (context lines
> for hunk #1 of sgml-mode.el are different), but the comments are
> no longer highlighted as comments.
Ah, I guess reusing the default font-lock-syntactic-face-function
doesn't really make sense after all. So sgml-font-lock-syntactic-face
should be like this:
(defun sgml-font-lock-syntactic-face (state)
"`font-lock-syntactic-face-function' for `sgml-mode'."
;; Don't use string face outside of tags.
(cond ((and (nth 9 state) (nth 3 state)) font-lock-string-face)
((nth 4 state) font-lock-comment-face)))
[-- Attachment #2: patch --]
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From 0c3e6a97f92dec31e7e186dae933c86700034089 Mon Sep 17 00:00:00 2001
From: Noam Postavsky <npostavs@gmail.com>
Date: Sun, 26 May 2019 17:41:22 -0400
Subject: [PATCH] Don't fontify text outside of SGML/XML tags (Bug#33887)
* lisp/font-lock.el (font-lock-syntactic-face-function-default): New
function.
(font-lock-syntactic-face-function): Use it as default value.
* lisp/textmodes/sgml-mode.el (sgml-font-lock-syntactic-face): New
function.
(sgml-mode):
* lisp/nxml/nxml-mode.el (nxml-mode): Use it as
font-lock-syntactic-face-function value.
---
lisp/font-lock.el | 7 +++++--
lisp/nxml/nxml-mode.el | 4 +++-
lisp/textmodes/sgml-mode.el | 12 ++++++++++--
3 files changed, 18 insertions(+), 5 deletions(-)
diff --git a/lisp/font-lock.el b/lisp/font-lock.el
index 3991a4ee8e..ddf1cbdb9f 100644
--- a/lisp/font-lock.el
+++ b/lisp/font-lock.el
@@ -527,9 +527,12 @@ (defvar font-lock-syntactically-fontified 0
sometimes be slightly incorrect.")
(make-variable-buffer-local 'font-lock-syntactically-fontified)
+(defun font-lock-syntactic-face-function-default (state)
+ "Default value for `font-lock-syntactic-face-function'."
+ (if (nth 3 state) font-lock-string-face font-lock-comment-face))
+
(defvar font-lock-syntactic-face-function
- (lambda (state)
- (if (nth 3 state) font-lock-string-face font-lock-comment-face))
+ #'font-lock-syntactic-face-function-default
"Function to determine which face to use when fontifying syntactically.
The function is called with a single parameter (the state as returned by
`parse-partial-sexp' at the beginning of the region to highlight) and
diff --git a/lisp/nxml/nxml-mode.el b/lisp/nxml/nxml-mode.el
index da01b2a342..05044d66df 100644
--- a/lisp/nxml/nxml-mode.el
+++ b/lisp/nxml/nxml-mode.el
@@ -551,7 +551,9 @@ (define-derived-mode nxml-mode text-mode "nXML"
nil ; no special syntax table
(font-lock-extend-region-functions . (nxml-extend-region))
(jit-lock-contextually . t)
- (font-lock-unfontify-region-function . nxml-unfontify-region)))
+ (font-lock-unfontify-region-function . nxml-unfontify-region)
+ (font-lock-syntactic-face-function
+ . sgml-font-lock-syntactic-face)))
(with-demoted-errors (rng-nxml-mode-init)))
diff --git a/lisp/textmodes/sgml-mode.el b/lisp/textmodes/sgml-mode.el
index 1df7e78afc..da25665e62 100644
--- a/lisp/textmodes/sgml-mode.el
+++ b/lisp/textmodes/sgml-mode.el
@@ -329,6 +329,12 @@ (defconst sgml-font-lock-keywords-2
(defvar sgml-font-lock-keywords sgml-font-lock-keywords-1
"Rules for highlighting SGML code. See also `sgml-tag-face-alist'.")
+(defun sgml-font-lock-syntactic-face (state)
+ "`font-lock-syntactic-face-function' for `sgml-mode'."
+ ;; Don't use string face outside of tags.
+ (cond ((and (nth 9 state) (nth 3 state)) font-lock-string-face)
+ ((nth 4 state) font-lock-comment-face)))
+
(defvar-local sgml--syntax-propertize-ppss nil)
(defun sgml--syntax-propertize-ppss (pos)
@@ -573,7 +579,7 @@ (define-derived-mode sgml-mode text-mode '(sgml-xml-mode "XML" "SGML")
;; This is desirable because SGML discards a newline that appears
;; immediately after a start tag or immediately before an end tag.
(setq-local paragraph-start (concat "[ \t]*$\\|\
-[ \t]*</?\\(" sgml-name-re sgml-attrs-re "\\)?>"))
+\[ \t]*</?\\(" sgml-name-re sgml-attrs-re "\\)?>"))
(setq-local paragraph-separate (concat paragraph-start "$"))
(setq-local adaptive-fill-regexp "[ \t]*")
(add-hook 'fill-nobreak-predicate 'sgml-fill-nobreak nil t)
@@ -591,7 +597,9 @@ (define-derived-mode sgml-mode text-mode '(sgml-xml-mode "XML" "SGML")
(setq font-lock-defaults '((sgml-font-lock-keywords
sgml-font-lock-keywords-1
sgml-font-lock-keywords-2)
- nil t))
+ nil t nil
+ (font-lock-syntactic-face-function
+ . sgml-font-lock-syntactic-face)))
(setq-local syntax-propertize-function #'sgml-syntax-propertize)
(setq-local facemenu-add-face-function 'sgml-mode-facemenu-add-face-function)
(setq-local sgml-xml-mode (sgml-xml-guess))
--
2.11.0
next prev parent reply other threads:[~2019-05-27 12:02 UTC|newest]
Thread overview: 42+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-12-27 10:13 bug#33887: 26.1; Emacs hangs for several seconds when going to the end of an XML file in nXML mode Vincent Lefevre
2018-12-27 16:02 ` Eli Zaretskii
2018-12-27 16:39 ` Stefan Monnier
2018-12-27 16:43 ` Eli Zaretskii
2018-12-27 17:32 ` Stefan Monnier
2018-12-27 17:47 ` Eli Zaretskii
2018-12-27 18:43 ` Vincent Lefevre
2018-12-28 17:18 ` Stefan Monnier
2019-01-17 22:57 ` Stefan Monnier
2019-01-08 22:11 ` Fernando Jascovich
2019-01-10 15:09 ` Eli Zaretskii
2019-01-17 23:25 ` Stefan Monnier
2019-05-15 23:53 ` Noam Postavsky
2019-05-16 10:54 ` Vincent Lefevre
2019-05-16 12:15 ` Noam Postavsky
2019-05-17 21:36 ` Vincent Lefevre
2019-05-18 4:15 ` Noam Postavsky
2019-05-18 14:47 ` Vincent Lefevre
2019-05-18 14:55 ` Vincent Lefevre
2019-05-18 14:57 ` Vincent Lefevre
2019-05-18 15:01 ` Vincent Lefevre
2019-05-18 18:49 ` Noam Postavsky
2019-05-19 0:17 ` Vincent Lefevre
2019-05-19 17:43 ` Noam Postavsky
2019-05-19 18:48 ` Stefan Monnier
2019-05-19 19:03 ` Noam Postavsky
2019-05-19 19:24 ` Stefan Monnier
2019-05-20 20:47 ` Noam Postavsky
2019-05-21 1:06 ` Vincent Lefevre
2019-05-21 12:27 ` Noam Postavsky
2019-05-22 13:58 ` Stefan Monnier
2019-05-22 15:44 ` Vincent Lefevre
2019-05-22 16:01 ` Stefan Monnier
2019-05-22 22:37 ` Stefan Monnier
2019-05-26 22:17 ` Noam Postavsky
2019-05-27 9:18 ` Vincent Lefevre
2019-05-27 12:02 ` Noam Postavsky [this message]
2019-05-29 0:30 ` Vincent Lefevre
2019-06-04 12:55 ` Noam Postavsky
2019-05-22 21:44 ` Stefan Monnier
2019-05-20 11:47 ` Vincent Lefevre
2019-05-16 14:01 ` Eli Zaretskii
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