From: Dmitry Gutov <dgutov@yandex.ru>
To: "Wedler, Christoph" <christoph.wedler@sap.com>,
Eli Zaretskii <eliz@gnu.org>,
"monnier@iro.umontreal.ca" <monnier@iro.umontreal.ca>,
"emacs-devel@gnu.org" <emacs-devel@gnu.org>
Subject: Re: [Emacs-diffs] scratch/widen-less a4ba846: Replace prog-widen with consolidating widen calls
Date: Sat, 16 Dec 2017 19:34:16 +0200 [thread overview]
Message-ID: <8e5adcd7-e085-e8d2-085f-398c660cd34d@yandex.ru> (raw)
In-Reply-To: <BEE4F6ED-B90A-4767-BA60-64758E37F642@sap.com>
[-- Attachment #1: Type: text/plain, Size: 3421 bytes --]
Hi Christoph,
On 12/15/17 5:48 PM, Wedler, Christoph wrote:
> Sorry for not having followed this discussion earlier - as the one who
> has somehow introduced `prog-indentation-context', I probably should have...
You checked out early from the previous discussion, so I didn't want to
drag you in again. Hope that's okay.
> If it works and you tell me how to do it, I have no issues with an
> alternative way to make the indentation function of a "sub mode" work
> for code chunks inside an "outer language" (like ANTLR grammar files).
Is there a reason why you called narrow-to-region in
antlr-python-indent-action-line anyway, even when using
prog-indentation-context?
Because you do that, though, the "new way" should work with your code
automatically. I'm attaching a patch with some minor cleanup, though.
Please try it with a build of Emacs from the 'widen-less' branch. Do you
know how to build it?
> I you want to try some ANTLR grammar examples yourself, I would
> recommend:
>
> - antlr-mode 3.1.4
> from https://sourceforge.net/projects/antlr-mode/files/
>
> - example grammar files, especially lines 46 to 51 in
> https://github.com/antlr/examples-v3/blob/master/Python/C/C.g
>
> - and others in that repo (mentioned in line 100 of antlr-mode.el)
antlr-mode.el says these examples are to see the syntax highlighting.
Any particular file and place to see how indentation works out? I
couldn't find one from a cursory search.
> Now to the elements in `prog-indentation-context':
>
> - FIRST-COLUMN: I understood that you want to keep (s/th like) that...
>
> - (START . END) = the region of the code chunk: well, some indentation
> engines got confused to see unknown code before code written in the
> "sub-modes" - for some I could do `narrow-to-region' myself, other
> engines did widen, like python. IMHO, modes with widening provide a
> better indentation experience than those without, see below.
>
> - PREVIOUS-CHUNKS: well, I was told to introduce this to be more
> general... - some modes (like cc-mode) could be told that the code is
> not some usual "top-level" code, but just some "normal statement".
> (antlr-mode includes some ugly hack for cc-mode).
>
> If all this is covered by a better way - fine with me! Even if does not cover
> PREVIOUS-CHUNKS…
Yup.
> Now to a mode with non-widening indentation function: emacs-lisp mode:
>
> Consider the following code
> (defun foo ()
> (+ 1 3))
>
> I would assume that the indentation of line 2 does not change
> when I narrow to line 2 - but Emacs-25.1.1 now deletes the first 2
> spaces of line 2... (yes; I also need to update to a newer Emacs)
Try out the widen-less branch!
And also, can we get your help with the manual? It still says:
Examples include
@dfn{literate programming} source files that combine documentation and
snippets of source code, Yacc/Bison programs that include snippets of
plain C code, etc. To correctly indent the embedded chunks, the primary
mode needs to delegate the indentation to another mode's indentation
engine (e.g., call @code{c-indent-defun} for C code or
@code{python-indent-line} for Python)
I.e., it still mentions C and c-indent-defun (?). But c-indent-defun
does not work for embedded chunks (yet)!
Can we replace that mentions with JS and js-indent-line, for instance?
Would that still make sense?
[-- Attachment #2: antlr-mode-cleanup.diff --]
[-- Type: text/x-patch, Size: 1135 bytes --]
diff -u --label /home/dgutov/examples/antlr/antlr-mode.el --label \#\<buffer\ antlr-mode.el\> /home/dgutov/examples/antlr/antlr-mode.el /tmp/buffer-content-4j5MsU
--- /home/dgutov/examples/antlr/antlr-mode.el
+++ #<buffer antlr-mode.el>
@@ -3408,12 +3408,10 @@
(when (and boa
(eq antlr-indent-comment t) ; indent-region
(boundp 'prog-indentation-context)) ; Emacs 24.5 or later
- (let ((syntax-ppss-cache nil) ;#dynamic
- (syntax-ppss-last nil) ;#dynamic
- ;; TODO: do we also need to call `syntax-propertize'?
- ;; and/or bind `syntax-propertize-function'?
- (prog-indentation-context ;#dynamic
- (list (+ leftouter c-basic-offset) (list (1+ boa)))))
+ (let ((prog-indentation-context ;#dynamic
+ (list (+ leftouter c-basic-offset))))
+ ;; TODO: do we also need to call `syntax-propertize'?
+ ;; and/or bind `syntax-propertize-function'?
(narrow-to-region (1+ boa) (point-max))
(python-indent-line (eq this-command 'antlr-indent-command))))))
Diff finished. Sat Dec 16 19:27:17 2017
next prev parent reply other threads:[~2017-12-16 17:34 UTC|newest]
Thread overview: 115+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-12-15 15:48 [Emacs-diffs] scratch/widen-less a4ba846: Replace prog-widen with consolidating widen calls Wedler, Christoph
2017-12-16 15:00 ` Stefan Monnier
2017-12-16 17:34 ` Dmitry Gutov [this message]
2017-12-18 12:39 ` Wedler, Christoph
2017-12-18 14:50 ` Dmitry Gutov
2017-12-18 17:41 ` Wedler, Christoph
2017-12-19 0:27 ` Dmitry Gutov
2017-12-19 11:27 ` Wedler, Christoph
2017-12-20 0:07 ` Dmitry Gutov
[not found] <20171129233237.27462.23351@vcs0.savannah.gnu.org>
[not found] ` <20171129233238.504B5204F1@vcs0.savannah.gnu.org>
2017-11-30 1:53 ` Stefan Monnier
2017-11-30 8:59 ` Dmitry Gutov
2017-11-30 10:58 ` Dmitry Gutov
2017-11-30 15:31 ` Tom Tromey
2017-11-30 21:28 ` Dmitry Gutov
2017-11-30 21:46 ` Alan Mackenzie
2017-11-30 23:09 ` Dmitry Gutov
2017-12-01 15:49 ` Alan Mackenzie
2017-12-01 16:26 ` Stefan Monnier
2017-12-01 18:20 ` Alan Mackenzie
2017-12-01 18:59 ` Dmitry Gutov
2017-12-01 19:51 ` Stefan Monnier
2017-12-01 20:50 ` Dmitry Gutov
2017-12-02 2:24 ` Stefan Monnier
2017-12-02 20:01 ` Dmitry Gutov
2017-12-02 23:47 ` Stefan Monnier
2017-12-03 3:38 ` Eli Zaretskii
2017-12-03 23:43 ` Dmitry Gutov
2017-12-04 3:38 ` Eli Zaretskii
2017-12-04 11:53 ` Dmitry Gutov
2017-12-04 16:41 ` Eli Zaretskii
2017-12-04 17:45 ` Stefan Monnier
2017-12-05 0:10 ` Dmitry Gutov
2017-12-03 16:42 ` Dmitry Gutov
2017-12-03 21:23 ` Stefan Monnier
2017-12-03 23:58 ` Dmitry Gutov
2017-12-01 17:06 ` Drew Adams
2017-12-01 18:03 ` Stefan Monnier
2017-12-01 21:27 ` Vitalie Spinu
2017-12-01 21:38 ` Dmitry Gutov
2017-12-01 22:45 ` Alan Mackenzie
2017-12-02 2:53 ` Stefan Monnier
2017-12-02 14:02 ` Tom Tromey
2017-12-02 23:48 ` Richard Stallman
2017-12-01 19:13 ` Dmitry Gutov
2017-12-01 22:35 ` Alan Mackenzie
2017-12-01 23:24 ` Dmitry Gutov
2017-12-02 2:47 ` Stefan Monnier
2017-12-02 20:28 ` Alan Mackenzie
2017-12-03 0:03 ` Stefan Monnier
2017-12-03 12:18 ` Alan Mackenzie
2017-12-03 16:02 ` Dmitry Gutov
2017-12-03 3:52 ` Dmitry Gutov
2017-12-03 14:54 ` Alan Mackenzie
2017-12-03 18:40 ` Stefan Monnier
2017-12-03 22:26 ` Alan Mackenzie
2017-12-03 23:42 ` Stefan Monnier
2017-12-03 23:53 ` Dmitry Gutov
2017-12-02 8:27 ` Eli Zaretskii
2017-12-02 10:50 ` Dmitry Gutov
2017-12-02 11:10 ` Eli Zaretskii
2017-12-02 16:41 ` Stefan Monnier
2017-12-02 17:13 ` Eli Zaretskii
2017-12-02 17:53 ` Stefan Monnier
2017-12-02 18:33 ` Eli Zaretskii
2017-12-02 20:18 ` Dmitry Gutov
2017-12-02 20:14 ` Dmitry Gutov
2017-12-02 20:58 ` Eli Zaretskii
2017-12-02 21:35 ` Dmitry Gutov
2017-12-03 15:28 ` Eli Zaretskii
2017-12-03 16:35 ` Dmitry Gutov
2017-12-03 17:20 ` Eli Zaretskii
2017-12-03 19:43 ` Dmitry Gutov
2017-12-04 15:52 ` Eli Zaretskii
2017-12-04 16:35 ` Stefan Monnier
2017-12-04 16:56 ` Eli Zaretskii
2017-12-04 22:57 ` Dmitry Gutov
2017-12-04 23:27 ` Dmitry Gutov
2017-12-03 18:59 ` Alan Mackenzie
2017-12-03 19:25 ` Eli Zaretskii
2017-12-03 21:20 ` Alan Mackenzie
2017-12-04 16:10 ` Eli Zaretskii
2017-12-04 16:23 ` Alan Mackenzie
2017-12-04 16:48 ` Eli Zaretskii
2017-12-03 22:01 ` Stefan Monnier
2017-12-04 0:37 ` Dmitry Gutov
2017-12-04 15:52 ` Alan Mackenzie
2017-12-04 16:46 ` Eli Zaretskii
2017-12-05 13:08 ` Dmitry Gutov
2017-12-03 21:52 ` Stefan Monnier
2017-12-04 0:03 ` Dmitry Gutov
2017-12-04 16:12 ` Eli Zaretskii
2017-12-04 16:49 ` Stefan Monnier
2017-12-04 17:28 ` Eli Zaretskii
2017-12-04 21:52 ` Dmitry Gutov
2017-12-05 5:08 ` Eli Zaretskii
2017-12-05 5:33 ` Eli Zaretskii
2017-12-05 10:55 ` Dmitry Gutov
2017-12-05 17:53 ` Eli Zaretskii
2017-12-05 18:40 ` Dmitry Gutov
2017-12-05 20:49 ` Eli Zaretskii
2017-12-05 23:16 ` Dmitry Gutov
2017-12-06 9:28 ` Eli Zaretskii
2017-12-06 13:36 ` Dmitry Gutov
2017-12-08 16:41 ` Eli Zaretskii
2017-12-09 15:17 ` Dmitry Gutov
2017-12-09 15:43 ` Eli Zaretskii
2017-12-10 19:59 ` Dmitry Gutov
2017-12-10 20:04 ` Eli Zaretskii
2017-12-05 12:55 ` Dmitry Gutov
2017-12-05 17:57 ` Eli Zaretskii
2017-12-05 18:54 ` Dmitry Gutov
2017-12-05 20:48 ` Eli Zaretskii
2017-12-05 21:08 ` Ingo Lohmar
2017-12-06 9:26 ` Eli Zaretskii
2017-12-06 13:37 ` Dmitry Gutov
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