From: Kenichi Handa <handa@gnu.org>
To: emacs-devel@gnu.org
Subject: Re: compose-region docstring update (was: using glyphs by default in perl-mode)
Date: Sun, 09 Jun 2013 08:45:48 -0400 [thread overview]
Message-ID: <yw7hah7311f.fsf@fencepost.gnu.org> (raw)
In-Reply-To: <877gi6qa57.fsf_-_@lifelogs.com> (message from Ted Zlatanov on Fri, 07 Jun 2013 10:16:04 -0400)
In article <877gi6qa57.fsf_-_@lifelogs.com>, Ted Zlatanov <tzz@lifelogs.com> writes:
KH> Yes. And, here are simple examples:
KH> (insert (compose-string "." 0 1 '(?+ (tc . bc) ?o)))
KH> (insert (compose-string "." 0 1 '(?+ (cc . cc) ?o)))
> Thanks for the examples. Can you explain them (I think I do, but your
> words would be welcome help)? I will update the docstring once I
> understand this well enough.
I'll try to explain the first example. In it,
compose-string has the optional 4th argument COMPONENTS.
The explanation of COMPONENTS (of type "list") is explained in
compose-region as below:
If it is a vector or list, it is a sequence of alternate characters and
composition rules, where (2N)th elements are characters and (2N+1)th
elements are composition rules to specify how to compose (2N+2)th
elements with previously composed N glyphs.
So, as for (?+ (tc . bc) ?o), ?+ is the first alternate
character, (tc . bc) is the first composition rule, ?o is
the second alternate character. This means ?o is composed
with ?+ by the rule (tc . bc).
And the docstring of reference-point-alist explains the meaing of (tc
. bc). According to the docstring, it means that ?o is compose with ?+
by aligning the top-center point of the glyphs of ?+ and the
bottom-center point of the glyph of ?o. That yeilds a glyph whose
lower part is ?+ and upper part is ?o.
---
Kenichi Handa
handa@gnu.org
next prev parent reply other threads:[~2013-06-09 12:45 UTC|newest]
Thread overview: 71+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-04-30 0:50 using glyphs by default in perl-mode Dan Nicolaescu
2013-05-05 4:37 ` Stefan Monnier
2013-05-05 7:34 ` James Cloos
2013-05-06 1:09 ` Stefan Monnier
2013-05-06 4:26 ` Dan Nicolaescu
2013-05-06 15:09 ` Stefan Monnier
2013-05-07 16:32 ` Dan Nicolaescu
2013-05-07 21:20 ` Stefan Monnier
2013-05-08 3:22 ` Dan Nicolaescu
2013-05-08 4:02 ` Stefan Monnier
2013-05-09 16:31 ` Dan Nicolaescu
2013-05-09 16:39 ` Eli Zaretskii
2013-05-09 17:22 ` Stefan Monnier
2013-05-09 18:39 ` Dan Nicolaescu
2013-05-09 18:58 ` Andreas Röhler
2013-05-09 19:31 ` James Cloos
2013-05-17 13:01 ` Ted Zlatanov
2013-05-17 15:48 ` Stefan Monnier
2013-05-19 2:50 ` Ted Zlatanov
2013-05-30 0:01 ` Dan Nicolaescu
2013-05-30 14:47 ` Ted Zlatanov
2013-05-30 17:18 ` Stefan Monnier
2013-05-30 20:32 ` Ted Zlatanov
2013-06-01 6:29 ` Dan Nicolaescu
2013-06-01 13:46 ` Ted Zlatanov
2013-06-01 14:47 ` Stefan Monnier
2013-06-02 12:35 ` Ted Zlatanov
2013-06-02 15:52 ` Stefan Monnier
2013-06-03 2:02 ` Ted Zlatanov
2013-06-03 2:04 ` Ted Zlatanov
2013-06-03 7:04 ` Stefan Monnier
2013-06-04 1:52 ` Ted Zlatanov
2013-06-04 14:28 ` Davis Herring
2013-06-04 17:20 ` Stefan Monnier
2013-06-04 20:06 ` Ted Zlatanov
2013-06-05 1:27 ` Stefan Monnier
2013-06-05 14:45 ` Ted Zlatanov
2013-06-05 16:13 ` Stefan Monnier
2013-06-05 17:28 ` Ted Zlatanov
2013-06-05 17:42 ` joakim
2013-06-05 17:58 ` Ted Zlatanov
2013-06-05 17:50 ` Ted Zlatanov
2013-06-05 18:52 ` Stefan Monnier
2013-06-05 19:36 ` Ted Zlatanov
2013-06-05 20:13 ` joakim
2013-06-05 16:43 ` Glenn Morris
2013-06-05 17:52 ` Ted Zlatanov
2013-06-05 18:07 ` Glenn Morris
2013-06-05 18:33 ` Ted Zlatanov
2013-06-05 18:55 ` Stefan Monnier
2013-06-05 19:34 ` Ted Zlatanov
2013-06-05 20:19 ` Stefan Monnier
2013-06-07 7:36 ` Eli Zaretskii
2013-06-07 7:45 ` bug#13189: " Jambunathan K
2013-06-07 13:05 ` Ted Zlatanov
2013-06-07 16:07 ` Stefan Monnier
2013-06-07 16:07 ` Stefan Monnier
2013-06-07 16:44 ` Glenn Morris
2013-06-07 18:03 ` Ted Zlatanov
2013-06-07 19:14 ` Jambunathan K
2013-06-07 20:04 ` Glenn Morris
2013-06-07 19:15 ` Stefan Monnier
2013-06-07 7:45 ` Jambunathan K
2013-06-07 12:48 ` Ted Zlatanov
2013-06-07 14:52 ` Eli Zaretskii
2013-06-07 15:39 ` Ted Zlatanov
2013-06-07 12:53 ` Kenichi Handa
2013-06-07 14:16 ` compose-region docstring update (was: using glyphs by default in perl-mode) Ted Zlatanov
2013-06-09 12:45 ` Kenichi Handa [this message]
2013-05-09 18:30 ` using glyphs by default in perl-mode Dan Nicolaescu
2013-05-10 0:23 ` Richard Stallman
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