[gnome-games/wip/exalm/subprocess: 6/6] display-view: Handle runner crashes

[Alexander Mikhaylenko <alexm src gnome org>]

commit 854935f41885a1dca0b8f7061d6a039497870006
Author: Alexander Mikhaylenko <alexm gnome org>
Date:   Fri Jan 10 18:58:29 2020 +0500

    display-view: Handle runner crashes

 src/core/runner.vala        |  1 +
 src/retro/retro-runner.vala | 18 ++++++++++++++----
 src/ui/display-box.vala     |  7 +++++++
 src/ui/display-view.vala    | 26 +++++++++++++++++++++++++-
 4 files changed, 47 insertions(+), 5 deletions(-)
---
diff --git a/src/core/runner.vala b/src/core/runner.vala
index 1bedceca..83b4e3b2 100644
--- a/src/core/runner.vala
+++ b/src/core/runner.vala
@@ -3,6 +3,7 @@
 public interface Games.Runner : Object {
        public signal void new_savestate_created ();
        public signal void stopped ();
+       public signal void crash (string message);
 
        public abstract bool can_fullscreen { get; }
        public abstract bool can_resume { get; }
diff --git a/src/retro/retro-runner.vala b/src/retro/retro-runner.vala
index b6205096..aaa54176 100644
--- a/src/retro/retro-runner.vala
+++ b/src/retro/retro-runner.vala
@@ -62,6 +62,7 @@ public class Games.RetroRunner : Object, Runner {
 
        private bool is_initialized;
        private bool is_ready;
+       private bool is_error;
 
        public RetroRunnerBuilder builder {
                construct {
@@ -275,6 +276,10 @@ public class Games.RetroRunner : Object, Runner {
                _input_mode = input_manager.input_mode;
 
                core.shutdown.connect (stop);
+               core.crashed.connect ((core, error) => {
+                       is_error = true;
+                       crash (error);
+               });
 
                running = false;
 
@@ -288,8 +293,11 @@ public class Games.RetroRunner : Object, Runner {
                settings.changed["video-filter"].disconnect (on_video_filter_changed);
 
                core = null;
-               view.set_core (null);
-               view = null;
+
+               if (view != null) {
+                       view.set_core (null);
+                       view = null;
+               }
 
                input_manager = null;
 
@@ -353,8 +361,10 @@ public class Games.RetroRunner : Object, Runner {
                if (!running)
                        return;
 
-               current_state_pixbuf = view.get_pixbuf ();
-               core.stop ();
+               if (!is_error) {
+                       current_state_pixbuf = view.get_pixbuf ();
+                       core.stop ();
+               }
 
                //FIXME:
                // In the future here there will be code which updates the currently
diff --git a/src/ui/display-box.vala b/src/ui/display-box.vala
index 45db5c9a..261faf1f 100644
--- a/src/ui/display-box.vala
+++ b/src/ui/display-box.vala
@@ -4,6 +4,7 @@
 private class Games.DisplayBox : Gtk.Bin {
        public signal void back ();
        public signal void snapshots_hidden ();
+       public signal void restart ();
 
        private bool _is_fullscreen;
        public bool is_fullscreen {
@@ -78,6 +79,12 @@ private class Games.DisplayBox : Gtk.Bin {
                error_display.running_game_failed (game, error_message);
        }
 
+       public void display_game_crashed (Game game, string error_message) {
+               stack.visible_child = error_display;
+               is_showing_snapshots = false;
+               error_display.game_crashed (game, error_message);
+       }
+
        [GtkCallback]
        private void on_fullscreen_header_bar_back () {
                back ();
diff --git a/src/ui/display-view.vala b/src/ui/display-view.vala
index e7421ee3..5c08a753 100644
--- a/src/ui/display-view.vala
+++ b/src/ui/display-view.vala
@@ -57,6 +57,7 @@ private class Games.DisplayView : Object, UiView {
        private QuitDialog quit_dialog;
 
        private long focus_out_timeout_id;
+       private Game game;
 
        private SimpleActionGroup action_group;
        private const ActionEntry[] action_entries = {
@@ -164,6 +165,9 @@ private class Games.DisplayView : Object, UiView {
                }
 
                // Shortcuts for the Savestates manager
+               if (runner == null)
+                       return false;
+
                if (!runner.supports_savestates)
                        return false;
 
@@ -284,6 +288,8 @@ private class Games.DisplayView : Object, UiView {
                if (runner != null && !quit_game ())
                        return;
 
+               this.game = game;
+
                if (run_game_cancellable != null)
                        run_game_cancellable.cancel ();
 
@@ -312,6 +318,19 @@ private class Games.DisplayView : Object, UiView {
                header_bar.media_set = runner.media_set;
                box.header_bar.media_set = runner.media_set;
 
+               runner.crash.connect (message => {
+                       runner.stop ();
+                       reset_display_page ();
+
+                       if (run_game_cancellable != null)
+                               run_game_cancellable.cancel ();
+
+                       if (quit_game_cancellable != null)
+                               quit_game_cancellable.cancel ();
+
+                       box.display_game_crashed (game, message);
+               });
+
                update_actions ();
 
                is_fullscreen = settings.get_boolean ("fullscreen") && can_fullscreen;
@@ -585,7 +604,12 @@ private class Games.DisplayView : Object, UiView {
        }
 
        private void restart () {
-               if (runner != null && runner.is_integrated)
+               if (runner != null && runner.is_integrated) {
                        runner.restart ();
+                       return;
+               }
+
+               if (game != null)
+                       run_game (game);
        }
 }