Add CallsEncryptionIndicator

This will be used in the next commit to let a call display indicate
whether the call is encrypted or not.

src/calls-encryption-indicator.h

@@ -0,0 +1,45 @@
+/*
+ * Copyright (C) 2018 Purism SPC
+ *
+ * This file is part of Calls.
+ *
+ * Calls 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.
+ *
+ * Calls 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 Calls.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ * Author: Adrien Plazas <adrien.plazas@puri.sm>
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ *
+ */
+
+#ifndef CALLS_ENCRYPTION_INDICATOR_H__
+#define CALLS_ENCRYPTION_INDICATOR_H__
+
+#include <gtk/gtk.h>
+
+G_BEGIN_DECLS
+
+#define CALLS_TYPE_ENCRYPTION_INDICATOR (calls_encryption_indicator_get_type ())
+
+G_DECLARE_FINAL_TYPE (CallsEncryptionIndicator, calls_encryption_indicator, CALLS, ENCRYPTION_INDICATOR, GtkStack);
+
+
+void     calls_encryption_indicator_set_encrypted (CallsEncryptionIndicator *self,
+                                                   gboolean                  encrypted);
+gboolean calls_encryption_indicator_get_encrypted (CallsEncryptionIndicator *self);
+
+
+G_END_DECLS
+
+#endif /* CALLS_ENCRYPTION_INDICATOR_H__ */
+