shift + click on a GC occupant print his nick in textview. For #1933

src/groupchat_control.py

@@ -1584,6 +1584,22 @@ class GroupchatControl(ChatControlBase):
 						widget.collapse_row(path)
 					else:
 						widget.expand_row(path, False)
+			elif event.state & gtk.gdk.SHIFT_MASK:
+				message_buffer = self.msg_textview.get_buffer()
+				start_iter, end_iter = message_buffer.get_bounds()
+				cursor_position = message_buffer.get_insert()
+				end_iter = message_buffer.get_iter_at_mark(cursor_position)
+				text = message_buffer.get_text(start_iter, end_iter, False)
+				start = ''
+				if text: # Cursor is not at first position
+					if not text[-1] in (' ', '\n', '\t'):
+						start = ' '
+					add = ' '
+				else:
+					add = self.gc_refer_to_nick_char + ' '
+				message_buffer.insert_at_cursor(start + nick + add)
+				self.msg_textview.grab_focus()
+				return True
 
 	def on_list_treeview_motion_notify_event(self, widget, event):
 		model = widget.get_model()