Re: Preparation for work on translations

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Just let us know when the translation files are ready (with minimal
instructions of where they are located and how to upload them once

translated) and I translate them into Spanish and so correct that

even today there are phrases here and there in English using R14.0.5
in Spanish (a friend who is not on the list can translate into French,
if no person in the list is presented as a candidate). Hopefully more
people will join and we will keep the translations up to date (users
without programming skills in C / C ++ can help only in a few areas).

A hug.


_______________________________
De: Slávek Banko <slavek.banko@xxxxxxx>
Para: trinity-devel@xxxxxxxxxxxxxxxxxxxxxxxxxx 
Enviado: Domingo 25 de noviembre de 2018 2:57
Asunto:  Preparation for work on translations


Hi all,

those of you who have been here for a long time might recall that when I 
joined the community I assumed that my tasks would be only two: backport 
patches to the stable TDE series and work on translation. Over time, it 
turned out that my tasks on the project would be bigger. However, work
on translations is still a postponed task.

Recently, I have devoted some time to the tasks that are essential to move 
us forward with the work on translations. Therefore, I would like to 
inform you about the results and related plans.

I apologize for long email.


1. Unnecessary updates of POT files during package build

I observed that during the DEB packages build, an attempt was made to 
update POT files. However, this step makes no sense. Bundling usually 
takes place in dedicated pure chroot. Therefore, the result of updating 
POT files would be discarded anyway. So this is unnecessary work.

At the same time, the extractrc tool is used during the POT files update. 
But this tool is part of the tdesdk-scripts-trinity package. Therefore, 
when building other packages, it is usually not present. So updating POT 
files during building could not work well.

That's why I already removed these unnecessary updates of POT files while 
building DEB packages.


2. Do we still need to use the old modified version of xgettext?

I found out what the current status is and whether there are still reasons 
to use the old modified version of xgettext (kde-xgettext). Patches for 
the old version solve two things:

a) adding a way to enter plural forms of strings

b) adding a way to enter translation context

The current versions of gexttext already have both of these options, but 
they seem to be implemented in a different way. Before we can start using 
standard xgettext in TDE, we will need to add support for a new way of 
plural forms of strings and translation contexts.

So far, we need to continue using an old modified version of kde-xgettext.


3. Can modern gettext replace the extractrc tool?

Modern versions of gettext can handle XML files. We use XML files 
for 'kcfg', 'rc' and 'ui'. Using ITS support in gettext, there is a way 
to define which texts are to be extracted for translations. I tested this 
option, but I encountered some problems:

a) Tags are written in strings as html entities: &lt; / &gt; / &amp;. 
After extraction using xgettext, are left in this form. But the extractrc 
tool convert them to the appropriate characters '<', '>', '&'. I did not 
find a way to do this with xgettext and ITS.

b) XPath is used to determine which strings are to be extracted from XML 
files. Files 'kcfg' use their own XML namespace and I did not find a way 
how to enter XPath to work properly with ITS in xgettext.

That's why I decided it was better to continue using the extractrc tool.


4. How do we create and update POT files?

In order to provide strings for translation, we first need to create and 
update POT files. The best place for these files is right in the source 
code – in GIT. Therefore, these files need to be maintained independently 
of the building binaries. Therefore, it is obvious that for this task it 
is not a good time during the build binary packages, nor the usual use of 
Automake or CMake.

Although the usual use of CMake with CMakeLists.txt for updating POT files 
is not a good choice, using CMake as such seems to be a good idea. CMake 
allows using the -P option to process a different file than the usual 
CMakeLists.txt. In this case, it does not create build folder, it does 
not create a cache - exactly as it suits us for our purpose.

I decided to use the name CMakeL10n.txt. I have prepared the CMake module 
TDEL10n.cmake. This module provides functions for simplifing directories 
handling – function tde_add_l10n_subdirectory as the equivalent for 
add_subdirectory and function tde_auto_add_l10n_subdirectories as an 
equivalent for tde_auto_add_subdirectories. And above all, the 
tde_create_l10n_template macro that provides POT files generation.

This macro provides some benefits that seemed useful:

a) If resource files are processed – for example, *.ui, the work 
file "rc.cpp" is commonly used to save extracted strings for translation. 
This file is then processed by kde-xgettext. Links to the original 
location of strings in the resulting POT file then refer to 
this "rc.cpp", which is not very useful.

The tde_create_l10n_template macro performs additional processing by 
replacing references to "rc.cpp" with references to the original resource 
files. Therefore, the POT file does not refer to a non-existent "rc.cpp" 
file, but to real locations in resource files.

b) When a new POT file is generated, a comparison is made with the 
original POT file. If only the date of POT file generation is changed, 
the original POT file will be left unchanged.

This prevents unnecessary POT file updates. This will allow to run a 
regular update of POT files without causing unnecessary commits.


5. What's next?

For revisions and comments, I created a pull request containing a CMake 
module TDEL10n.cmake:

https://mirror.git.trinitydesktop.org/gitea/TDE/tde-common-cmake/pulls/2

...and pull requests with a demonstration of use CMakeL10n in two modules:

https://mirror.git.trinitydesktop.org/gitea/TDE/abakus/pulls/1
https://mirror.git.trinitydesktop.org/gitea/TDE/tdebase/pulls/19

After testing, we will need to add CMakeL10n.txt to generate POT files in 
all other modules. Once we have automated updating of POT files, 
translation work can begin!


6. How can users work on translations?

I will leave the answer to this question for later. Whoever was more 
attentive could have noticed in several earlier commits that "something 
is being prepared" :)


Cheers
-- 
Slávek

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