GNU bug report logs - #26291
In mode-line-format, `:propertize' drops some existing text properties

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Message #10 received at control <at> debbugs.gnu.org (full text, mbox):

From: Noam Postavsky <npostavs <at> users.sourceforge.net>
To: control <at> debbugs.gnu.org
Subject: Re: bug#28595: In mode-line-format,
 `:propertize' drops some existing text properties
Date: Mon, 25 Sep 2017 19:52:23 -0400

forcemerge 26291 28559
quit

Eli Zaretskii <eliz <at> gnu.org> writes:

> 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.

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