In all modes, if Tor isn't connected display a message instead of showing the mode content

desktop/src/onionshare/gui_common.py

@@ -281,6 +281,11 @@ class GuiCommon:
                 QLabel {
                     color: #cc0000;
                 }""",
+            "tor_not_connected_label": """
+                QLabel {
+                    font-size: 16px;
+                    font-style: italic;
+                }""",
             # New tab
             "new_tab_button_image": """
                 QLabel {

desktop/src/onionshare/resources/locale/en.json

@@ -229,5 +229,6 @@
     "moat_captcha_reload": "Reload",
     "moat_bridgedb_error": "Error contacting BridgeDB.",
     "moat_captcha_error": "The solution is not correct. Please try again.",
-    "moat_solution_empty_error": "You must enter the characters from the image"
+    "moat_solution_empty_error": "You must enter the characters from the image",
+    "mode_tor_not_connected_label": "OnionShare is not connected to the Tor network"
 }

desktop/src/onionshare/tab/mode/__init__.py

@@ -28,7 +28,7 @@ from .mode_settings_widget import ModeSettingsWidget
 from ..server_status import ServerStatus
 from ... import strings
 from ...threads import OnionThread, AutoStartTimer
-from ...widgets import Alert
+from ...widgets import Alert, MinimumSizeWidget
 
 
 class Mode(QtWidgets.QWidget):
@@ -101,6 +101,35 @@ class Mode(QtWidgets.QWidget):
         self.primary_action = QtWidgets.QWidget()
         self.primary_action.setLayout(self.primary_action_layout)
 
+        # It's up to the downstream Mode to add stuff to self.content_layout
+        # self.content_layout shows the actual content of the mode
+        # self.tor_not_connected_layout is displayed when Tor isn't connected
+        self.content_layout = QtWidgets.QVBoxLayout()
+        self.content_widget = QtWidgets.QWidget()
+        self.content_widget.setLayout(self.content_layout)
+
+        tor_not_connected_label = QtWidgets.QLabel(
+            strings._("mode_tor_not_connected_label")
+        )
+        tor_not_connected_label.setAlignment(QtCore.Qt.AlignHCenter)
+        tor_not_connected_label.setStyleSheet(
+            self.common.gui.css["tor_not_connected_label"]
+        )
+        self.tor_not_connected_layout = QtWidgets.QVBoxLayout()
+        self.tor_not_connected_layout.addStretch()
+        self.tor_not_connected_layout.addWidget(tor_not_connected_label)
+        self.tor_not_connected_layout.addWidget(MinimumSizeWidget(700, 0))
+        self.tor_not_connected_layout.addStretch()
+        self.tor_not_connected_widget = QtWidgets.QWidget()
+        self.tor_not_connected_widget.setLayout(self.tor_not_connected_layout)
+
+        self.wrapper_layout = QtWidgets.QVBoxLayout()
+        self.wrapper_layout.addWidget(self.content_widget)
+        self.wrapper_layout.addWidget(self.tor_not_connected_widget)
+        self.setLayout(self.wrapper_layout)
+
+        self.tor_connection_init()
+
     def init(self):
         """
         Add custom initialization here.
@@ -524,3 +553,26 @@ class Mode(QtWidgets.QWidget):
         Used in both Share and Website modes, so implemented here.
         """
         self.history.cancel(event["data"]["id"])
+
+    def tor_connection_init(self):
+        """
+        Figure out if Tor is connected and display the right widget
+        """
+        if self.common.gui.onion.is_authenticated():
+            self.tor_connection_started()
+        else:
+            self.tor_connection_stopped()
+
+    def tor_connection_started(self):
+        """
+        This is called on every Mode when Tor is connected
+        """
+        self.content_widget.show()
+        self.tor_not_connected_widget.hide()
+
+    def tor_connection_stopped(self):
+        """
+        This is called on every Mode when Tor is disconnected
+        """
+        self.content_widget.hide()
+        self.tor_not_connected_widget.show()

desktop/src/onionshare/tab/mode/chat_mode/__init__.py

@@ -98,10 +98,8 @@ class ChatMode(Mode):
         self.column_layout.addWidget(self.image)
         self.column_layout.addLayout(self.main_layout)
 
-        # Wrapper layout
+        # Content layout
-        self.wrapper_layout = QtWidgets.QVBoxLayout()
+        self.content_layout.addLayout(self.column_layout)
-        self.wrapper_layout.addLayout(self.column_layout)
-        self.setLayout(self.wrapper_layout)
 
     def get_type(self):
         """

desktop/src/onionshare/tab/mode/receive_mode/__init__.py

@@ -198,10 +198,8 @@ class ReceiveMode(Mode):
         self.column_layout.addLayout(row_layout)
         self.column_layout.addWidget(self.history, stretch=1)
 
-        # Wrapper layout
+        # Content layout
-        self.wrapper_layout = QtWidgets.QVBoxLayout()
+        self.content_layout.addLayout(self.column_layout)
-        self.wrapper_layout.addLayout(self.column_layout)
-        self.setLayout(self.wrapper_layout)
 
     def get_type(self):
         """

desktop/src/onionshare/tab/mode/share_mode/__init__.py

@@ -169,10 +169,8 @@ class ShareMode(Mode):
         self.column_layout.addLayout(self.main_layout)
         self.column_layout.addWidget(self.history, stretch=1)
 
-        # Wrapper layout
+        # Content layout
-        self.wrapper_layout = QtWidgets.QVBoxLayout()
+        self.content_layout.addLayout(self.column_layout)
-        self.wrapper_layout.addLayout(self.column_layout)
-        self.setLayout(self.wrapper_layout)
 
         # Always start with focus on file selection
         self.file_selection.setFocus()

desktop/src/onionshare/tab/mode/website_mode/__init__.py

@@ -167,10 +167,8 @@ class WebsiteMode(Mode):
         self.column_layout.addLayout(self.main_layout)
         self.column_layout.addWidget(self.history, stretch=1)
 
-        # Wrapper layout
+        # Content layout
-        self.wrapper_layout = QtWidgets.QVBoxLayout()
+        self.content_layout.addLayout(self.column_layout)
-        self.wrapper_layout.addLayout(self.column_layout)
-        self.setLayout(self.wrapper_layout)
 
         # Always start with focus on file selection
         self.file_selection.setFocus()

desktop/src/onionshare/tab/tab.py

@@ -96,7 +96,6 @@ class Tab(QtWidgets.QWidget):
         tab_id,
         system_tray,
         status_bar,
-        mode_settings=None,
         filenames=None,
     ):
         super(Tab, self).__init__()

desktop/src/onionshare/tab_widget.py

@@ -235,6 +235,8 @@ class TabWidget(QtWidgets.QTabWidget):
             self.common, self.current_tab_id, self.are_tabs_active(), self.status_bar
         )
         self.tor_settings_tab.close_this_tab.connect(self.close_tor_settings_tab)
+        self.tor_settings_tab.tor_is_connected.connect(self.tor_is_connected)
+        self.tor_settings_tab.tor_is_disconnected.connect(self.tor_is_disconnected)
         self.tabs[self.current_tab_id] = self.tor_settings_tab
         self.current_tab_id += 1
         index = self.addTab(
@@ -399,6 +401,26 @@ class TabWidget(QtWidgets.QTabWidget):
         close_button.clicked.connect(close_tab)
         self.tabBar().setTabButton(index, QtWidgets.QTabBar.RightSide, tab.close_button)
 
+    def tor_is_connected(self):
+        for tab_id in self.tabs:
+            if not (
+                type(self.tabs[tab_id]) is SettingsTab
+                or type(self.tabs[tab_id]) is TorSettingsTab
+            ):
+                mode = self.tabs[tab_id].get_mode()
+                if mode:
+                    mode.tor_connection_started()
+
+    def tor_is_disconnected(self):
+        for tab_id in self.tabs:
+            if not (
+                type(self.tabs[tab_id]) is SettingsTab
+                or type(self.tabs[tab_id]) is TorSettingsTab
+            ):
+                mode = self.tabs[tab_id].get_mode()
+                if mode:
+                    mode.tor_connection_stopped()
+
 
 class TabBar(QtWidgets.QTabBar):
     """

desktop/src/onionshare/tor_settings_tab.py

@@ -40,6 +40,8 @@ class TorSettingsTab(QtWidgets.QWidget):
     """
 
     close_this_tab = QtCore.Signal()
+    tor_is_connected = QtCore.Signal()
+    tor_is_disconnected = QtCore.Signal()
 
     def __init__(self, common, tab_id, are_tabs_active, status_bar):
         super(TorSettingsTab, self).__init__()
@@ -699,6 +701,9 @@ class TorSettingsTab(QtWidgets.QWidget):
 
                 # Do we need to reinitialize Tor?
                 if reboot_onion:
+                    # Tell the tabs that Tor is disconnected
+                    self.tor_is_disconnected.emit()
+
                     # Reinitialize the Onion object
                     self.common.log(
                         "TorSettingsTab", "save_clicked", "rebooting the Onion"
@@ -742,6 +747,9 @@ class TorSettingsTab(QtWidgets.QWidget):
                 self.common.gui.onion.is_authenticated()
                 and not self.tor_con.wasCanceled()
             ):
+                # Tell the tabs that Tor is connected
+                self.tor_is_connected.emit()
+                # Close the tab
                 self.close_this_tab.emit()
 
         self.tor_con_type = None