Make copying text work with different layouts

This makes it possible so text can be copied from the conversation textview with other keyboard layouts than english

gajim/chat_control_base.py

@@ -55,6 +55,7 @@
 from gajim.gtk.dialogs import NonModalConfirmationDialog
 from gajim.gtk.util import convert_rgb_to_hex
 from gajim.gtk.util import get_primary_accel_mod
+from gajim.gtk.util import get_hardware_key_codes
 
 from gajim.gtk.emoji_chooser import emoji_chooser
 
@@ -80,6 +81,13 @@ class ChatControlBase(MessageControl, ChatCommandProcessor, CommandTools):
     A base class containing a banner, ConversationTextview, MessageTextView
     """
 
+    # This is needed so copying text from the conversation textview
+    # works with different language layouts. Pressing the key c on a russian
+    # layout yields another keyval than with the english layout.
+    # So we match hardware keycodes instead of keyvals.
+    # Multiple hardware keycodes can trigger a keyval like Gdk.KEY_c.
+    keycodes_c = get_hardware_key_codes(Gdk.KEY_c)
+
     def make_href(self, match):
         url_color = app.css_config.get_value('.gajim-url', StyleAttr.COLOR)
         color = convert_rgb_to_hex(url_color)
@@ -570,7 +578,7 @@ def _on_banner_eventbox_button_press_event(self, widget, event):
 
     def _conv_textview_key_press_event(self, _widget, event):
         if (event.get_state() & get_primary_accel_mod() and
-                event.keyval in (Gdk.KEY_c, Gdk.KEY_Insert)):
+                event.hardware_keycode in self.keycodes_c):
             return Gdk.EVENT_PROPAGATE
 
         if (event.get_state() & Gdk.ModifierType.SHIFT_MASK and

gajim/gtk/util.py

@@ -255,3 +255,12 @@ def get_primary_accel_mod():
     cmd on osx, ctrl everywhere else.
     """
     return Gtk.accelerator_parse("<Primary>")[1]
+
+
+def get_hardware_key_codes(keyval):
+    keymap = Gdk.Keymap.get_for_display(Gdk.Display.get_default())
+
+    valid, key_map_keys = keymap.get_entries_for_keyval(keyval)
+    if not valid:
+        return []
+    return [key.keycode for key in key_map_keys]