fix undo history getting cleared when deleting tracks

Fixes https://todo.sr.ht/~alextee/zrythm-bug/870.

inc/audio/automation_point.h

@@ -1,21 +1,5 @@
-/*
- * Copyright (C) 2018-2022 Alexandros Theodotou <alex at zrythm dot org>
- *
- * This file is part of Zrythm
- *
- * Zrythm is free software: you can redistribute it and/or modify
- * it under the terms of the GNU Affero General Public License as published by
- * the Free Software Foundation, either version 3 of the License, or
- * (at your option) any later version.
- *
- * Zrythm 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 Affero General Public License for more details.
- *
- * You should have received a copy of the GNU Affero General Public License
- * along with Zrythm.  If not, see <https://www.gnu.org/licenses/>.
- */
+// SPDX-FileCopyrightText: © 2018-2022 Alexandros Theodotou <alex@zrythm.org>
+// SPDX-License-Identifier: LicenseRef-ZrythmLicense
 
 /**
  * \file

inc/utils/stack.h

@@ -1,21 +1,5 @@
-/*
- * Copyright (C) 2019-2021 Alexandros Theodotou <alex at zrythm dot org>
- *
- * This file is part of Zrythm
- *
- * Zrythm is free software: you can redistribute it and/or modify
- * it under the terms of the GNU Affero General Public License as published by
- * the Free Software Foundation, either version 3 of the License, or
- * (at your option) any later version.
- *
- * Zrythm 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 Affero General Public License for more details.
- *
- * You should have received a copy of the GNU Affero General Public License
- * along with Zrythm.  If not, see <https://www.gnu.org/licenses/>.
- */
+// SPDX-FileCopyrightText: © 2019-2021 Alexandros Theodotou <alex@zrythm.org>
+// SPDX-License-Identifier: LicenseRef-ZrythmLicense
 
 /**
  * \file

src/actions/actions.c

@@ -1860,8 +1860,20 @@ activate_delete_selected_tracks (
       return;
     }
 
-  on_delete_tracks_response (
-    NULL, GTK_RESPONSE_YES, NULL);
+  GError * err = NULL;
+  bool     ret =
+    tracklist_selections_action_perform_delete (
+      TRACKLIST_SELECTIONS, PORT_CONNECTIONS_MGR,
+      &err);
+  if (ret)
+    {
+      EVENTS_PUSH (ET_UNDO_REDO_ACTION_DONE, NULL);
+    }
+  else
+    {
+      HANDLE_ERROR (
+        err, "%s", _ ("Failed to delete tracks"));
+    }
 }
 
 DEFINE_SIMPLE (activate_hide_selected_tracks)

src/gui/widgets/automation_point.c

@@ -133,7 +133,6 @@ automation_point_draw (
 
   int upslope =
     next_ap && ap->fvalue < next_ap->fvalue;
-  (void) upslope;
   (void) next_obj;
 
   if (next_ap)

tests/actions/tracklist_selections.c

@@ -1039,6 +1039,10 @@ test_no_visible_tracks_after_track_deletion (void)
   g_assert_cmpint (
     TRACKLIST_SELECTIONS->num_tracks, >, 0);
 
+  /* assert undo history is not empty */
+  g_assert_false (undo_stack_is_empty (
+    UNDO_MANAGER->undo_stack));
+
   test_helper_zrythm_cleanup ();
 }
 
@@ -3189,15 +3193,15 @@ main (int argc, char * argv[])
 #define TEST_PREFIX \
   "/actions/tracklist_selections/"
 
-  g_test_add_func (
-    TEST_PREFIX
-    "test track deletion with lv2 worker",
-    (GTestFunc) test_track_deletion_with_lv2_worker);
   g_test_add_func (
     TEST_PREFIX
     "test no visible tracks after track deletion",
     (GTestFunc)
       test_no_visible_tracks_after_track_deletion);
+  g_test_add_func (
+    TEST_PREFIX
+    "test track deletion with lv2 worker",
+    (GTestFunc) test_track_deletion_with_lv2_worker);
   g_test_add_func (
     TEST_PREFIX
     "test track deletion w mixer selections",