Re: [Texmacs-dev] The default mimeType seems overly aggressive.

[Massimiliano Gubinelli]

It is not clear to me what is the proper way to handle this issue.

On one hand LyX lists only its own format:

https://www.lyx.org/trac/browser/lyxgit/lib/lyx.desktop.in?rev=20e1fe4674cdcd0164c74f76dddd882d95ea3c88

While on the other the freedesktop site says explicitly 

https://specifications.freedesktop.org/desktop-entry-spec/0.9.5/ar01s07.html

"It is also worth noting who this mechanism is defined for. It is primarily 
intended for use by distributors/sysadmins to provide a sane set of defaults 
for their users. Additionally, users themselves can use this mechanism to 
override the user defaults. We intentionally don't provide a way for 
application authors themselves to list themselves as the default for a given 
type, as we felt that that cannot work."

So it seems that we can list the text/plain type since we actually can handle 
it and there is somewhere else a problem when our declaration is taken as a 
request to set a system default.

Can it be that is something else causing the problem?

my 2 cents.

Best,

Max


> On 15. Mar 2021, at 18:17, Ingolf Schäfer <in_sc11@uni-bremen.de> wrote:
> 
> Dear Darcy,
> 
> may I jump in?
> 
> I can't name all systems, but it happens on Arch-based systems with KDE 
> (including my computers) and likely with Kubuntu, too. Denis explained why 
> very well. It is likely happening on most Linux distros with KDE and LXQt, if 
> the developers of that distro use the default mime settings for those desktop 
> environments.
> 
> Best wishes,
> 
> 
> 
> Ingolf
> 
> 
> 
> Am 15.03.21 um 16:43 schrieb Darcy Shen via Texmacs-dev:
>> > Some system will treat _text/plain_ very serious and override default
>> app for all text files, including .sh .py .cpp .h .conf .ini .xml
>> .html etc.
>> 
>> slbtty, could you explicitly list these systems?
>> 
>> 
>> ---- On Mon, 2021-03-15 19:39:14 denis Raux 
>> <denis.raux@lix.polytechnique.fr> wrote ----
>> 
>> As I’m not a Linux user I cannot really see the tricky side effects.  As far 
>> I  remember desktop environment behaves differently according the linux 
>> distribution and desktop manager. As far I remember, it was quite difficult 
>> to overload the defaults mime types (defined for tex or historic texmacs)  
>> and that is done by InitialPreference=99 for KDE Environment. Unfortunately 
>> this priority applies to every mime types defined  in texmacs.desktop.
>> 
>> On the most downloaded/used Linux distributions (Ubuntu), texmacs 
>> installation doesn’t change the default text/plain manager (at least with 
>> gnome desktop).
>> 
>> That’s said, texmacs is capable of dealing perfectly with text files but 
>> it’s true there are plenty others set in Linux systems.
>> 
>> I wonder if simply remove texmacs as support of text/plain cannot have side 
>> effect for example cut/paste functionality.
>> The solution would be to lower the texmacs priority for text/plain type in 
>> order to keep the current default. I’ll investigate in this way.
>> 
>> 
>> Denis
>> 
>> Le 13 mars 2021 à 16:29, Darcy Shen <sadhen@zoho.com.cn> a écrit :
>> 
>> I agree with you.
>> 
>> And here is your PR: https://github.com/texmacs/texmacs/pull/50
>> 
>> Thanks for your contribution.
>> 
>> If your PR actually fixes a bug, I would like to review and apply the patch 
>> to SVN.
>> 
>> -------
>> 
>> Denis, what's your opinion?
>> 
>> 
>> ---- On Wed, 2021-02-17 16:56:47 slb <shenlebantongying@gmail.com> wrote ----
>> 
>> Hi,
>> 
>> According to `TeXmacs/misc/mime/texmacs.desktop` [0], texmacs will set
>> 
>> > MimeType=text/x-texmacs.doc;text/x-texmacs.sty;text/plain;text/x-tex;
>> 
>> It includes a _text/plain_ !
>> 
>> Some system will treat _text/plain_ very serious and override default
>> app for all text files, including .sh .py .cpp .h .conf .ini .xml
>> .html etc.
>> 
>> The reason is that text/x-python, text/x-c++src, text/html are all
>> subtype of _text/plain_.
>> 
>> TeXmacs is obviously not a general purpose text editor like VIM or
>> Emacs. I do not want to use TeXmacs as source code editor or editing
>> my configuration files.
>> 
>> Please remove _text/plain_.
>> 
>> ---
>> 
>> In the same time, texmacs rely on scheme source codes, I suggest to
>> include an "x-scheme".
>> 
>> x-scheme are defined at xdg-shared-mime-info.xml [1] as below. The
>> shared-mime-info database should be included on most of the modern
>> GNU/linux distros.
>> <comment>Scheme source code</comment>
>> <sub-class-of type="text/plain"/>
>> <glob pattern="*.scm"/>
>> <glob pattern="*.ss"/>
>> </mime-type>
>> <mime-type type="text/x-scheme">
>> 
>> [0] 
>> http://svn.savannah.gnu.org/viewvc/texmacs/trunk/src/TeXmacs/misc/mime/texmacs.desktop?view=markup
>> [1] 
>> https://github.com/freedesktop/xdg-shared-mime-info/blob/103b3058353ee7ca2b154b2e3d26d12cd1de958d/data/freedesktop.org.xml.in#L6462
>> [3] Shared MIME-info Database specification from freedesktop.org
>> https://www.freedesktop.org/wiki/Specifications/shared-mime-info-spec/
>> 
>> Thanks for great software BTW :)
>> slbtty
>> 
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>> 
>> 
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> -- 
> Dr. Ingolf Schäfer
> Universitätslektor für Mathematik
> Fachbereich 3, Universität Bremen
> Gebäude Unicom 2 (Oxford), Raum 2.0090
> Postfach 105
> Tel: +49 (421) 218 63718
> 
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