[omemo] Polish GUI

- Port Fingerprint dialog from openpgp plugin
- Add an InfoBar for errors and informations
- Add tooltip for device clearing
- Remove fingerprints tab from plugin config dialog

omemo/gtk/util.py

@@ -0,0 +1,73 @@
+# This file is part of Gajim-OMEMO.
+#
+# Gajim-OMEMO is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published
+# by the Free Software Foundation; version 3 only.
+#
+# Gajim-OMEMO is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with Gajim-OMEMO. If not, see <http://www.gnu.org/licenses/>.
+
+
+from collections import namedtuple
+from enum import IntEnum
+from enum import Enum
+
+from gi.repository import Gtk
+
+DialogButton = namedtuple('DialogButton', 'text callback action')
+DialogButton.__new__.__defaults__ = (None, None)  # type: ignore
+
+
+class ButtonAction(Enum):
+    DESTRUCTIVE = 'destructive-action'
+    SUGGESTED = 'suggested-action'
+
+
+class Trust(IntEnum):
+    NOT_TRUSTED = 0
+    VERIFIED = 1
+    UNKNOWN = 2
+
+
+class NewConfirmationDialog(Gtk.MessageDialog):
+    def __init__(self, text, sec_text, buttons, transient_for=None):
+        Gtk.MessageDialog.__init__(self,
+                                   transient_for=transient_for,
+                                   message_type=Gtk.MessageType.QUESTION,
+                                   text=text)
+
+        self._buttons = buttons
+
+        for response, button in buttons.items():
+            self.add_button(button.text, response)
+            if button.action is not None:
+                widget = self.get_widget_for_response(response)
+                widget.get_style_context().add_class(button.action.value)
+
+        self.format_secondary_markup(sec_text)
+
+        self.connect('response', self._on_response)
+
+        self.run()
+
+    def _on_response(self, dialog, response):
+        if response == Gtk.ResponseType.DELETE_EVENT:
+            # Look if DELETE_EVENT is mapped to another response
+            response = self._buttons.get(response, None)
+            if response is None:
+                # If DELETE_EVENT was not mapped we assume CANCEL
+                response = Gtk.ResponseType.CANCEL
+
+        button = self._buttons.get(response, None)
+        if button is None:
+            self.destroy()
+            return
+
+        if button.callback is not None:
+            button.callback()
+        self.destroy()