Added preference for changing interface language

blink/preferences.py

 
 import os
+import re
 import urllib.parse
 
 from PyQt5 import uic
 from PyQt5.QtCore import Qt, QEvent, QRegExp
 from PyQt5.QtGui import QFont, QRegExpValidator, QValidator
-from PyQt5.QtWidgets import QActionGroup, QButtonGroup, QFileDialog, QListView, QListWidgetItem, QMessageBox, QSpinBox, QStyle, QStyleOptionComboBox, QStyledItemDelegate
+from PyQt5.QtWidgets import QActionGroup, QApplication, QButtonGroup, QFileDialog, QListView, QListWidgetItem, QMessageBox, QSpinBox, QStyle, QStyleOptionComboBox, QStyledItemDelegate
 
 from application import log
 from application.notification import IObserver, NotificationCenter
@@ -33,6 +34,35 @@ from blink.util import QSingleton, call_in_gui_thread, run_in_gui_thread
 __all__ = ['PreferencesWindow', 'AccountListView', 'SIPPortEditor']
 
 
+class LanguageError(Exception): pass
+
+
+class Language(object):
+    filename_regex = re.compile(r'(\w+)_(\w+).*\.(\w+$)')
+    mapping = {"default": "System default",
+               "en": "English",
+               "nl": "Nederlands",
+               "ro": "Română"}
+
+    def __init__(self, file):
+        print(file)
+        if file in ['default', 'en']:
+            self.name = self.mapping[file]
+            self.language_code = file
+            return
+
+        match = self.filename_regex.match(file)
+        if match[3] != 'qm':
+            raise LanguageError('Unsupported file')
+
+        try:
+            self.name = self.mapping[match[2]]
+        except KeyError:
+            raise LanguageError('Unsupported file')
+
+        self.language_code = match[2]
+
+
 # LineEdit and ComboBox validators
 #
 class IDDPrefixValidator(QRegExpValidator):
@@ -354,6 +384,7 @@ class PreferencesWindow(base_class, ui_class, metaclass=QSingleton):
 
         # Interface
         self.history_name_and_uri_button.clicked.connect(self._SH_HistoryNameAndUriButtonClicked)
+        self.language_button.activated[int].connect(self._SH_LanguageButtonActivated)
 
         # Setup initial state (show the accounts page right after start)
         self.accounts_action.trigger()
@@ -439,6 +470,19 @@ class PreferencesWindow(base_class, ui_class, metaclass=QSingleton):
         self.idd_prefix_button.setValidator(IDDPrefixValidator(self))
         self.prefix_button.setValidator(PrefixValidator(self))
 
+        # Languages
+        self.language_button.clear()
+        languages_path = Resources.get('i18n')
+        self.language_button.addItem('System Default', Language('default'))
+        self.language_button.addItem('English', Language('en'))
+        for language_file in os.listdir(languages_path):
+            try:
+                language = Language(language_file)
+            except LanguageError:
+                pass
+            else:
+                self.language_button.addItem(language.name, language)
+
         # Adding the button group in designer has issues on Ubuntu 10.04
         self.sip_transports_button_group = QButtonGroup(self)
         self.sip_transports_button_group.setObjectName("sip_transports_button_group")
@@ -781,6 +825,13 @@ class PreferencesWindow(base_class, ui_class, metaclass=QSingleton):
 
         self.history_name_and_uri_button.setChecked(blink_settings.interface.show_history_name_and_uri)
 
+        language_index = self.language_button.findText(Language.mapping[blink_settings.interface.language])
+        if language_index == -1:
+            language_index = 0
+            blink_settings.interface.language = self.language_button.itemData(language_index).language_code
+            blink_settings.save()
+        self.language_button.setCurrentIndex(language_index)
+
     def load_account_settings(self, account):
         """Load the account settings from configuration into the UI controls"""
         settings = SIPSimpleSettings()
@@ -1871,6 +1922,20 @@ class PreferencesWindow(base_class, ui_class, metaclass=QSingleton):
         settings.interface.show_history_name_and_uri = checked
         settings.save()
 
+    def _SH_LanguageButtonActivated(self, index):
+        data = self.language_button.itemData(index)
+        settings = BlinkSettings()
+        if data.language_code != settings.interface.language:
+            settings.interface.language = data.language_code
+            settings.save()
+            title = "Restart required"
+            question = "The application language was changed. A restart is required to apply the change. Would you like to restart now?"
+            if QMessageBox.question(self, title, question) == QMessageBox.No:
+                return
+
+            blink = QApplication.instance()
+            blink.restart()
+
     @run_in_gui_thread
     def handle_notification(self, notification):
         handler = getattr(self, '_NH_%s' % notification.name, Null)

resources/preferences.ui

@@ -3724,6 +3724,19 @@
             <property name="spacing">
              <number>5</number>
             </property>
+            <item row="1" column="0">
+             <widget class="Line" name="line_14">
+              <property name="baseSize">
+               <size>
+                <width>0</width>
+                <height>10</height>
+               </size>
+              </property>
+              <property name="orientation">
+               <enum>Qt::Horizontal</enum>
+              </property>
+             </widget>
+            </item>
             <item row="0" column="0">
              <widget class="QLabel" name="label_6">
               <property name="font">
@@ -3737,7 +3750,86 @@
               </property>
              </widget>
             </item>
-            <item row="3" column="0">
+            <item row="6" column="0">
+             <layout class="QHBoxLayout" name="horizontalLayout">
+              <item>
+               <widget class="QLabel" name="label_8">
+                <property name="sizePolicy">
+                 <sizepolicy hsizetype="Preferred" vsizetype="Preferred">
+                  <horstretch>0</horstretch>
+                  <verstretch>0</verstretch>
+                 </sizepolicy>
+                </property>
+                <property name="font">
+                 <font>
+                  <weight>50</weight>
+                  <bold>false</bold>
+                 </font>
+                </property>
+                <property name="text">
+                 <string>Interface Language:</string>
+                </property>
+                <property name="alignment">
+                 <set>Qt::AlignRight|Qt::AlignTrailing|Qt::AlignVCenter</set>
+                </property>
+               </widget>
+              </item>
+              <item>
+               <widget class="QComboBox" name="language_button">
+                <property name="currentText">
+                 <string>System Default</string>
+                </property>
+                <property name="currentIndex">
+                 <number>0</number>
+                </property>
+                <property name="sizeAdjustPolicy">
+                 <enum>QComboBox::AdjustToContents</enum>
+                </property>
+                <item>
+                 <property name="text">
+                  <string>System Default</string>
+                 </property>
+                </item>
+                <item>
+                 <property name="text">
+                  <string notr="true">English</string>
+                 </property>
+                </item>
+                <item>
+                 <property name="text">
+                  <string notr="true" comment="nl">Nederlands</string>
+                 </property>
+                </item>
+                <item>
+                 <property name="text">
+                  <string notr="true" comment="ro">Română</string>
+                 </property>
+                </item>
+               </widget>
+              </item>
+              <item>
+               <spacer name="horizontalSpacer_2">
+                <property name="orientation">
+                 <enum>Qt::Horizontal</enum>
+                </property>
+                <property name="sizeHint" stdset="0">
+                 <size>
+                  <width>40</width>
+                  <height>20</height>
+                 </size>
+                </property>
+               </spacer>
+              </item>
+             </layout>
+            </item>
+            <item row="5" column="0">
+             <widget class="Line" name="line_15">
+              <property name="orientation">
+               <enum>Qt::Horizontal</enum>
+              </property>
+             </widget>
+            </item>
+            <item row="8" column="0">
              <spacer name="verticalSpacer_5">
               <property name="orientation">
                <enum>Qt::Vertical</enum>
@@ -3757,16 +3849,16 @@
               </property>
              </widget>
             </item>
-            <item row="1" column="0">
-             <widget class="Line" name="line_14">
-              <property name="baseSize">
-               <size>
-                <width>0</width>
-                <height>10</height>
-               </size>
+            <item row="4" column="0">
+             <widget class="QLabel" name="label_7">
+              <property name="font">
+               <font>
+                <weight>75</weight>
+                <bold>true</bold>
+               </font>
               </property>
-              <property name="orientation">
-               <enum>Qt::Horizontal</enum>
+              <property name="text">
+               <string>Localization</string>
               </property>
              </widget>
             </item>