Rare: Improve translation handling

* Remove base Qt translations from repo, load translations from Qt itself
* Prefix translation `qm` files with `rare_`.
* Rename `translation_source.ts` to simply `source.ts`
* If the selected language matches the system local, remove the option from the configuration.

.tx/config

@@ -2,9 +2,9 @@
 host = https://www.transifex.com
 
 [o:rare-1:p:rare:r:placeholder-ts]
-file_filter  = rare/resources/languages/<lang>.ts
-source_file  = rare/resources/languages/translation_source.ts
-source_lang  = en_US
+file_filter  = rare/resources/languages/rare_<lang>.ts
+source_file  = rare/resources/languages/source.ts
+source_lang  = en
 type         = QT
 minimum_perc = 50
 

misc/py2ts.sh

@@ -3,6 +3,9 @@
 cwd="$(pwd)"
 cd "$(dirname "$0")"/.. || exit
 
-pylupdate5 -noobsolete $(find rare/ -iname "*.py") -ts rare/resources/languages/translation_source.ts
+#py_files=$(find rare -iname "*.py" -not -path rare/ui)
+#ui_files=$(find rare/ui -iname "*.ui")
+
+pylupdate5 -noobsolete $(find rare/ -iname "*.py") -ts rare/resources/languages/source.ts
 
 cd "$cwd" || exit

rare/components/tabs/settings/rare.py

@@ -1,6 +1,7 @@
 import os
 import platform
 import subprocess
+import locale
 import sys
 from logging import getLogger
 
@@ -33,9 +34,9 @@ def __init__(self, parent=None):
 
         # Select lang
         language = self.settings.value(*options.language)
-        self.lang_select.addItem(self.tr("System default"), "")
-        for locale, title in get_translations():
-            self.lang_select.addItem(title, locale)
+        self.lang_select.addItem(self.tr("System default"), options.language.default)
+        for lang_code, title in get_translations():
+            self.lang_select.addItem(title, lang_code)
         if (index := self.lang_select.findData(language, Qt.UserRole)) > 0:
             self.lang_select.setCurrentIndex(index)
         else:
@@ -212,8 +213,8 @@ def save_window_size(self):
         self.settings.remove(options.window_size.key)
 
     def on_lang_changed(self, index: int):
-        if not index:
+        lang_code = self.lang_select.itemData(index, Qt.UserRole)
+        if lang_code == locale.getlocale()[0]:
             self.settings.remove(options.language.key)
-            return
-        language = self.lang_select.itemData(index, Qt.UserRole)
-        self.settings.setValue(options.language.key, language)
+        else:
+            self.settings.setValue(options.language.key, lang_code)