From: "Clément Pit-Claudel" <cpitclaudel@gmail.com>
To: Stephen Berman <stephen.berman@gmx.net>
Cc: 40687@debbugs.gnu.org
Subject: bug#40687: Missing right border on composed text used in 'display property
Date: Fri, 17 Apr 2020 17:11:41 -0400 [thread overview]
Message-ID: <38186fd8-f181-4299-660b-252f7f8c1e23@gmail.com> (raw)
In-Reply-To: <875zdxvolv.fsf@gmx.net>
On 17/04/2020 16.33, Stephen Berman wrote:
> On Fri, 17 Apr 2020 15:44:36 -0400 Clément Pit-Claudel <cpitclaudel@gmail.com> wrote:
>
>> Hi all,
>>
>> With the following sample code, I observe the results shown in the attached image. The first two "ab" have a border, but the last one only has three-quarters of its border: the right side is missing.
>>
>> (defface my-button
>> '((t :box(:line-width -4 :style released-button)
>> :background"lightgrey":foreground"black"))
>> "Button face")
>>
>> (with-current-buffer (get-buffer-create "button")
>> (insert "\n")
>> (insert (propertize "ab" 'face 'my-button))
>> (insert " ")
>> (insert (propertize (compose-chars ?a '(Br . Bl) ?b) 'face 'my-button))
>> (insert " ")
>> (insert (propertize "ab" 'display (compose-chars ?a '(Br . Bl) ?b) 'face 'my-button))
>> (insert " ")
>> (pop-to-buffer-same-window (current-buffer)))
>
> I see the same thing, but I noticed that when you add a space to
> composed characters of the display property, ie.:
> (compose-chars ?a '(Br . Bl) ?b ? )
> then right side border appears.
IIUC, this space is read as the number 32 and considered as the encoded version of the rule (tr . br). Indeed, this gives the same result:
(insert (propertize "ab" 'display (compose-chars ?a '(Bc . Bc) ?b '(tr . br)) 'face 'my-button))
But is that even a valid composition rule?It seems to break with non-trivial composition, like the following:
(insert (propertize "ab" 'display (compose-chars ?a '(Bc . Bc) ?b ? ) 'face 'my-button))
(instead of being stacked, a and b are side by side)
next prev parent reply other threads:[~2020-04-17 21:11 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-04-17 19:44 bug#40687: Missing right border on composed text used in 'display property Clément Pit-Claudel
2020-04-17 20:33 ` Stephen Berman
2020-04-17 21:11 ` Clément Pit-Claudel [this message]
2020-04-23 15:49 ` Eli Zaretskii
2020-04-23 15:48 ` Eli Zaretskii
2020-04-23 20:07 ` Stephen Berman
2020-04-23 20:25 ` Clément Pit-Claudel
2020-04-24 6:43 ` Eli Zaretskii
2020-04-24 6:33 ` Eli Zaretskii
2020-04-24 12:10 ` Robert Pluim
2020-04-24 12:26 ` Eli Zaretskii
2020-04-24 14:01 ` Clément Pit-Claudel
2020-04-24 14:06 ` Eli Zaretskii
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