From: Stefan Monnier <monnier@iro.umontreal.ca>
To: JunJie Nan <nanjunjie@gmail.com>
Cc: emacs-devel@gnu.org
Subject: Re: A patch for enforcing double-width CJK character display
Date: Tue, 29 Apr 2014 01:39:39 -0400 [thread overview]
Message-ID: <jwvwqe8r9w2.fsf-monnier+emacs@gnu.org> (raw)
In-Reply-To: <CA+Gegu_J9EFD6WhiXvA8C+5EA2BwvpRD0Y_HLe_Lgb35kBkM0g@mail.gmail.com> (JunJie Nan's message of "Mon, 28 Apr 2014 13:35:03 +0800")
> Do not know why the patch is still not installed, although from the
> discussion thread nobody oppose it indeed.
Sorry, I can't remember seeing your patch before, I must have overlooked
it. Is it related to http://debbugs.gnu.org/10179?
This said, I don't know much of anything about the font drivers, so
I can't really comment on the substance of the code, but while waiting
for someone like Jan or Handa to look at it, I can give you some trivial
cosmetic recommendations (most of them documented in the "GNU Coding
Standards").
If you resubmit a new patch, I recommend you send it to
bug-gnu-emacs@gnu.org (so that it gets a tracking number) or directly to
10179@debbugs.gnu.org if it's related to that bug.
> + struct frame *frame; /* hold frame ptr, cjk double width fix need it */
Please capitalize and punctuate your comments.
> + int is_cjk; /* Flag to tell if it is CJK font or not. */
Thanks for capitalizing and punctuating this comment, this one is good.
We usually prefer to two spaces after the final ".", in case you feel
like polishing it yet a bit more.
> + because Korean fonts may not have any Chinese characters at all.
> + codes from xterm.*/
Here we do need spacing (ideally two spaces) between "." and "*/"
I don't understand exactly what is meant by "codes from xterm".
Maybe that should be "Code inspired by similar logic in XTerm"?
> +static int
> +xftfont_is_cjk_font(struct xftfont_info *xftfont_info)
Always put a space before the open parenthesis.
> +{
> + if(XftCharExists(xftfont_info->display, xftfont_info->xftfont, 0x4E00) ||
> + XftCharExists(xftfont_info->display, xftfont_info->xftfont, 0xAC00))
Same here. Additionally, please but the line before "||" rather than after.
> + return 1;
> + return 0;
Please make the return type "bool", then. And use "true" and "false"
rather than 1 and 0. Also, you can apply eta-reduction to the above
code and just write
return (XftCharExists (xftfont_info->display, xftfont_info->xftfont, 0x4E00)
|| XftCharExists (xftfont_info->display, xftfont_info->xftfont, 0xAC00));
[ Tho that would step over the 80 columns limit, so you may then want to
introduce a local var to hold xftfont_info->display, maybe. ]
> + if(half_width_cjk)
> + *half_width_cjk = 0;
I think half_width_cjk should be a pointer to "bool" and we should use
"false" here.
> + if( default_width == 0 || /* something wrong */
Please don't put a space after an open paren (but do put one before).
> + if( char_width < default_width) {
The "{" should be on a line of its own.
> + } else /* get the padding, all cjk symbols is DOUBLE width */
And the "}" should also be on its own line.
> + xftfont_info->is_cjk = xftfont_is_cjk_font(xftfont_info);
`is_cjk' should be a `bool' field.
Stefan
next prev parent reply other threads:[~2014-04-29 5:39 UTC|newest]
Thread overview: 53+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-04-28 5:35 A patch for enforcing double-width CJK character display JunJie Nan
2014-04-29 5:39 ` Stefan Monnier [this message]
2014-04-29 6:36 ` Jan D.
2014-04-29 8:16 ` Thien-Thi Nguyen
2014-04-29 20:41 ` Liang Wang
-- strict thread matches above, loose matches on Subject: below --
2014-10-04 3:26 Feng Shu
2014-04-30 2:00 Hui Liu
2014-04-30 17:08 ` Liang Wang
[not found] <4F85A138.6090900@i-soft.com.cn>
2012-04-11 15:48 ` Kan-Ru Chen
2012-04-11 16:16 ` 黄建忠
2012-04-12 8:56 ` 黄建忠
2012-04-12 9:53 ` Eli Zaretskii
2012-04-12 11:18 ` 黄建忠
2012-04-12 14:27 ` Eli Zaretskii
2012-04-12 17:56 ` 黄建忠
2012-04-12 20:33 ` Stefan Monnier
[not found] ` <4F8782C8.2030005@i-soft.com.cn>
2012-04-13 11:42 ` 黄建忠
2012-04-13 12:03 ` 黄建忠
2012-04-13 13:27 ` Stefan Monnier
2012-04-15 5:10 ` Miles Bader
2012-04-15 13:27 ` 黄建忠
2012-04-15 16:08 ` William Xu
2012-04-15 22:19 ` Miles Bader
2012-04-16 0:51 ` 黄建忠
2012-04-16 5:27 ` Miles Bader
2012-04-16 5:40 ` 黄建忠
2012-04-16 6:37 ` 黄建忠
2012-04-16 9:21 ` 黄建忠
2012-04-17 2:16 ` 黄建忠
2012-04-17 0:13 ` Miles Bader
2012-04-17 0:39 ` Miles Bader
2012-04-17 2:00 ` 黄建忠
2012-04-17 2:30 ` Miles Bader
2012-04-17 3:00 ` 黄建忠
2012-04-17 4:08 ` Miles Bader
2012-04-17 4:56 ` Werner LEMBERG
2012-04-17 5:02 ` 黄建忠
2012-04-17 6:33 ` Miles Bader
2012-04-17 7:03 ` Werner LEMBERG
2012-04-17 5:52 ` Miles Bader
2012-04-17 6:10 ` 黄建忠
2012-04-17 7:02 ` Miles Bader
2012-04-17 8:06 ` Werner LEMBERG
2012-04-17 8:25 ` Miles Bader
2012-04-17 9:06 ` Werner LEMBERG
2012-04-17 8:51 ` 黄建忠
2012-04-17 6:45 ` Werner LEMBERG
2012-04-17 9:07 ` James Cloos
2012-04-17 9:27 ` 黄建忠
2012-04-17 1:47 ` 黄建忠
2012-04-18 6:54 ` Kenichi Handa
2012-04-18 8:13 ` 黄建忠
2012-04-18 13:58 ` Miles Bader
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