GNU bug report logs - #28595
In mode-line-format, `:propertize' drops some existing text properties

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From: help-debbugs <at> gnu.org (GNU bug Tracking System)
To: Clément Pit--Claudel <clement.pitclaudel <at> live.com>
Cc: tracker <at> debbugs.gnu.org
Subject: bug#28595: closed (In mode-line-format, `:propertize' drops some
 existing text properties)
Date: Tue, 26 Sep 2017 14:34:02 +0000

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Your message dated Tue, 26 Sep 2017 01:10:40 +0200
with message-id <23591a71-d89d-1a61-cc7b-5ca448103b39 <at> live.com>
and subject line Re: bug#28595: In mode-line-format, `:propertize' drops some existing text properties
has caused the debbugs.gnu.org bug report #28595,
regarding In mode-line-format, `:propertize' drops some existing text properties
to be marked as done.

(If you believe you have received this mail in error, please contact
help-debbugs <at> gnu.org.)


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28595: http://debbugs.gnu.org/cgi/bugreport.cgi?bug=28595
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From: Clément Pit--Claudel <clement.pitclaudel <at> live.com>
To: bug-gnu-emacs <at> gnu.org
Subject: In mode-line-format, `:propertize' drops some existing text properties
Date: Sun, 24 Sep 2017 15:03:02 +0200

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Hi all,

Based on the docs, the three following forms should yield the same results:

(format-mode-line `(:propertize #("AB" 1 2 (x 0)) y 0))
(format-mode-line `(:propertize ("A" #("B" 0 1 (x 0))) y 0))
(format-mode-line '(:propertize ("A" (:propertize "B" x 0)) y 0))

But they don't:

(format-mode-line `(:propertize #("AB" 1 2 (x 0)) y 0))
=> #("AB" 0 2 (y 0)) ;; x 0 is dropped

(format-mode-line '(:propertize ("A" (:propertize "B" x 0)) y 0))
⇒ #("AB" 0 1 (y 0) 1 2 (x 0)) ;; y 0 is dropped on 1..2

(format-mode-line `(:propertize ("A" #("B" 0 1 (x 0))) y 0))
⇒ #("AB" 0 1 (y 0) 1 2 (y 0 x 0)) ;; Seems right

Am I misreading the docs?
Clément.

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From: Clément Pit--Claudel <clement.pitclaudel <at> live.com>
To: Eli Zaretskii <eliz <at> gnu.org>, bug-gnu-emacs <at> gnu.org,
 28595-done <at> debbugs.gnu.org
Subject: Re: bug#28595: In mode-line-format, `:propertize' drops some existing
 text properties
Date: Tue, 26 Sep 2017 01:10:40 +0200

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On 2017-09-25 20:52, Eli Zaretskii wrote:
> On September 24, 2017 2:03:02 PM GMT+01:00, "Clément Pit--Claudel" <clement.pitclaudel <at> live.com> wrote:
>> Hi all,
>>
>> Based on the docs, the three following forms should yield the same
>> results:
>>
>> (format-mode-line `(:propertize #("AB" 1 2 (x 0)) y 0))
>> (format-mode-line `(:propertize ("A" #("B" 0 1 (x 0))) y 0))
>> (format-mode-line '(:propertize ("A" (:propertize "B" x 0)) y 0))
>>
>> But they don't:
>>
>> (format-mode-line `(:propertize #("AB" 1 2 (x 0)) y 0))
>> => #("AB" 0 2 (y 0)) ;; x 0 is dropped
>>
>> (format-mode-line '(:propertize ("A" (:propertize "B" x 0)) y 0))
>> ⇒ #("AB" 0 1 (y 0) 1 2 (x 0)) ;; y 0 is dropped on 1..2
>>
>> (format-mode-line `(:propertize ("A" #("B" 0 1 (x 0))) y 0))
>> ⇒ #("AB" 0 1 (y 0) 1 2 (y 0 x 0)) ;; Seems right
>>
>> Am I misreading the docs?
>> Clément.
> 
> You already asked the same in bug#26291.

Ouch. Sorry.

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