GODT-2010: add Cocoa app delegate handler for second application instance.

internal/frontend/bridge-gui/bridge-gui/MacOS/DockIcon.mm

@@ -0,0 +1,54 @@
+// Copyright (c) 2022 Proton AG
+//
+// This file is part of Proton Mail Bridge.
+//
+// Proton Mail Bridge 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, either version 3 of the License, or
+// (at your option) any later version.
+//
+// Proton Mail Bridge 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 Proton Mail Bridge. If not, see <https://www.gnu.org/licenses/>.
+
+#pragma clang diagnostic push
+#pragma clang diagnostic ignored "-Wavailability"
+#pragma clang diagnostic ignored "-Wdeprecated-declarations"
+#pragma clang diagnostic ignored "-Wnullability-completeness"
+#pragma clang diagnostic ignored "-Wdeprecated-anon-enum-enum-conversion"
+#include <Cocoa/Cocoa.h>
+#pragma clang diagnostic pop
+
+#include "DockIcon.h"
+
+
+#ifdef Q_OS_MACOS
+
+
+void setDockIconVisibleState(bool visible) {
+    if (visible) {
+        [NSApp setActivationPolicy: NSApplicationActivationPolicyRegular];
+        return;
+    } else {
+        [NSApp setActivationPolicy: NSApplicationActivationPolicyAccessory];
+        return;
+    }
+}
+
+
+bool getDockIconVisibleState() {
+    switch ([NSApp activationPolicy]) {
+    case NSApplicationActivationPolicyAccessory:
+    case NSApplicationActivationPolicyProhibited:
+        return false;
+    case NSApplicationActivationPolicyRegular:
+        return true;
+    }
+}
+
+
+#endif // #ifdef Q_OS_MACOS