Use Qt's locale instead of Python's

Python locale (on Windows) is a mess, and doesn't return a proper RFC
1766 language code.

src/photini/address.py

@@ -17,7 +17,6 @@
 ##  <http://www.gnu.org/licenses/>.
 
 from collections import defaultdict
-import locale
 import logging
 import os
 
@@ -97,9 +96,8 @@ def query(self, params):
 
     def get_address(self, coords):
         params = {'q': '{:.5f},{:.5f}'.format(*coords)}
-        lang, encoding = locale.getlocale()
-        if lang:
-            params['language'] = lang
+        lang = self.app.locale.bcp47Name()
+        params['language'] = lang
         results = self.cached_query(params)
         if not results:
             return None

src/photini/azuremap.py

@@ -18,7 +18,6 @@
 #  along with Photini.  If not, see <http://www.gnu.org/licenses/>.
 
 import base64
-import locale
 import logging
 import os
 
@@ -67,11 +66,10 @@ def search(self, search_string, bounds=None):
             north, east, south, west = bounds
             params['bbox'] = '{:.4f},{:.4f},{:.4f},{:.4f}'.format(
                 west, south, east, north)
-        lang, encoding = locale.getlocale()
-        if lang:
-            lang, sep, country = lang.partition('_')
-            if country:
-                params['view'] = country
+        lang = self.app.locale.bcp47Name()
+        lang, sep, country = lang.partition('-')
+        if country:
+            params['view'] = country
         for feature in self.cached_query(
                 params, 'https://atlas.microsoft.com/geocode'):
             properties = feature['properties']
@@ -150,10 +148,9 @@ def get_options(self):
                 'subscriptionKey': self.api_key,
                 },
             }
-        language, encoding = locale.getlocale()
-        if language:
-            options['language'] = language.replace('_', '-')
-            language, sep, country = language.partition('_')
-            if country:
-                options['View'] = country
+        language = self.locale().bcp47Name()
+        options['language'] = language
+        language, sep, country = language.partition('_')
+        if country:
+            options['View'] = country
         return options

src/photini/bingmap.py

@@ -16,7 +16,6 @@
 ##  along with this program.  If not, see
 ##  <http://www.gnu.org/licenses/>.
 
-import locale
 import logging
 
 import requests
@@ -76,9 +75,8 @@ def search(self, search_string, bounds=None):
             'query' : search_string,
             'maxRes': '20',
             }
-        lang, encoding = locale.getlocale()
-        if lang:
-            params['culture'] = lang.replace('_', '-')
+        lang = self.app.locale.bcp47Name()
+        params['culture'] = lang
         if bounds:
             north, east, south, west = bounds
             params['userMapView'] = '{:.4f},{:.4f},{:.4f},{:.4f}'.format(
@@ -113,12 +111,10 @@ def get_geocoder(self):
     def get_head(self):
         url = 'http://www.bing.com/api/maps/mapcontrol?callback=initialize'
         url += '&key=' + self.api_key
-        lang, encoding = locale.getlocale()
-        if lang:
-            culture = lang.replace('_', '-')
-            url += '&setMkt=' + culture
-            language, sep, region = culture.partition('-')
-            url += '&setLang=' + language
+        lang = self.locale().bcp47Name()
+        url += '&setMkt=' + lang
+        lang, sep, region = lang.partition('-')
+        url += '&setLang=' + lang
         if self.app.options.test:
             url += '&branch=experimental'
         return '''    <script type="text/javascript"

src/photini/editor.py

@@ -369,6 +369,7 @@ def __init__(self, options, initial_files):
         # create shared global objects
         self.app = QtWidgets.QApplication.instance()
         self.app.config_store = ConfigStore('editor', parent=self)
+        self.app.locale = QtCore.QLocale.system()
         self.app.spell_check = SpellCheck(parent=self)
         if GpxImporter:
             self.app.gpx_importer = GpxImporter(parent=self)

src/photini/googlemap.py

@@ -16,7 +16,6 @@
 ##  along with this program.  If not, see
 ##  <http://www.gnu.org/licenses/>.
 
-import locale
 import logging
 import re
 
@@ -68,9 +67,8 @@ def get_altitude(self, coords):
 
     def search(self, search_string, bounds=None):
         params = {'address': search_string}
-        lang, encoding = locale.getlocale()
-        if lang:
-            params['language'] = lang.replace('_', '-')
+        lang = self.app.locale.bcp47Name()
+        params['language'] = lang
         if bounds:
             north, east, south, west = bounds
             params['bounds'] = '{:.4f},{:.4f}|{:.4f},{:.4f}'.format(
@@ -118,12 +116,11 @@ def get_head(self):
         if self.app.options.test:
             url += '&v=beta'
         url += '&key=' + self.api_key
-        lang, encoding = locale.getlocale()
-        if lang:
-            language, sep, region = lang.replace('_', '-').partition('-')
-            url += '&language=' + language
-            if region:
-                url += '&region=' + region
+        lang = self.locale().bcp47Name()
+        lang, sep, region = lang.partition('-')
+        url += '&language=' + lang
+        if region:
+            url += '&region=' + region
         return '''    <script type="text/javascript">
       const use_old_markers = {use_old_markers};
     </script>

src/photini/mapboxmap.py

@@ -16,7 +16,6 @@
 ##  along with this program.  If not, see
 ##  <http://www.gnu.org/licenses/>.
 
-import locale
 import logging
 
 import requests
@@ -40,9 +39,8 @@ def query(self, params):
         del params['query']
         params['access_token'] = self.api_key
         params['autocomplete '] = 'false'
-        lang, encoding = locale.getlocale()
-        if lang:
-            params['language'] = lang
+        lang = self.app.locale.bcp47Name()
+        params['language'] = lang
         query += '.json'
         url = 'https://api.mapbox.com/geocoding/v5/mapbox.places/' + query
         with Busy():
@@ -159,11 +157,9 @@ def get_body(self, text_dir):
 
     def get_options(self):
         options = {'accessToken': self.api_key}
-        lang, encoding = locale.getlocale()
-        if lang:
-            lang = lang.replace('_', '-')
-            options['language'] = lang
-            language, sep, region = lang.partition('-')
-            if region:
-                options['worldview'] = region
+        lang = self.locale().bcp47Name()
+        options['language'] = lang
+        lang, sep, region = lang.partition('-')
+        if region:
+            options['worldview'] = region
         return options

src/photini/photinimap.py

@@ -17,7 +17,6 @@
 ##  <http://www.gnu.org/licenses/>.
 
 from datetime import timezone
-import locale
 import logging
 import os
 import pickle
@@ -306,9 +305,7 @@ def get_options(self):
     def initialise(self):
         lat, lng = self.app.config_store.get('map', 'centre', (51.0, 0.0))
         zoom = float(self.app.config_store.get('map', 'zoom', 11))
-        lang, encoding = locale.getlocale()
-        lang = lang or 'en-GB'
-        lang = lang.replace('_', '-')
+        lang = self.locale().bcp47Name()
         text_dir = ('ltr', 'rtl')[
             self.use_layout_direction and
             self.layoutDirection() == Qt.LayoutDirection.RightToLeft]