[gnome-games] runner: Add 'can-quit-safely' prop

[Adrien Plazas <aplazas src gnome org>]

commit 0ec51d9187840d035d91838566e7c1abee750f59
Author: Adrien Plazas <kekun plazas laposte net>
Date:   Sun Mar 6 19:29:30 2016 +0100

    runner: Add 'can-quit-safely' prop
    
    This will be used in a subsequent commit to check if we can quit a game
    safely.

 plugins/steam/src/steam-runner.vala |    4 ++++
 src/command/command-runner.vala     |    4 ++++
 src/core/runner.vala                |    1 +
 src/dummy/dummy-runner.vala         |    4 ++++
 src/retro/retro-runner.vala         |    4 ++++
 5 files changed, 17 insertions(+), 0 deletions(-)
---
diff --git a/plugins/steam/src/steam-runner.vala b/plugins/steam/src/steam-runner.vala
index da4aff9..e0d523d 100644
--- a/plugins/steam/src/steam-runner.vala
+++ b/plugins/steam/src/steam-runner.vala
@@ -1,6 +1,10 @@
 // This file is part of GNOME Games. License: GPLv3
 
 private class Games.SteamRunner : Object, Runner {
+       public bool can_quit_safely {
+               get { return true; }
+       }
+
        public bool can_resume {
                get { return false; }
        }
diff --git a/src/command/command-runner.vala b/src/command/command-runner.vala
index c68bf92..15fc398 100644
--- a/src/command/command-runner.vala
+++ b/src/command/command-runner.vala
@@ -1,6 +1,10 @@
 // This file is part of GNOME Games. License: GPLv3
 
 public class Games.CommandRunner : Object, Runner {
+       public bool can_quit_safely {
+               get { return true; }
+       }
+
        public bool can_resume {
                get { return false; }
        }
diff --git a/src/core/runner.vala b/src/core/runner.vala
index c6f2de9..258a07d 100644
--- a/src/core/runner.vala
+++ b/src/core/runner.vala
@@ -3,6 +3,7 @@
 public interface Games.Runner : Object {
        public signal void stopped ();
 
+       public abstract bool can_quit_safely { get; }
        public abstract bool can_resume { get; }
 
        public abstract void check_is_valid () throws Error;
diff --git a/src/dummy/dummy-runner.vala b/src/dummy/dummy-runner.vala
index ba82971..a3ef3e3 100644
--- a/src/dummy/dummy-runner.vala
+++ b/src/dummy/dummy-runner.vala
@@ -1,6 +1,10 @@
 // This file is part of GNOME Games. License: GPLv3
 
 private class Games.DummyRunner : Object, Runner {
+       public bool can_quit_safely {
+               get { return true; }
+       }
+
        public bool can_resume {
                get { return false; }
        }
diff --git a/src/retro/retro-runner.vala b/src/retro/retro-runner.vala
index 0c87340..b04edf1 100644
--- a/src/retro/retro-runner.vala
+++ b/src/retro/retro-runner.vala
@@ -1,6 +1,10 @@
 // This file is part of GNOME Games. License: GPLv3
 
 public class Games.RetroRunner : Object, Runner {
+       public bool can_quit_safely {
+               get { return core_supports_snapshotting || !should_save; }
+       }
+
        public bool can_resume {
                get {
                        if (!core_supports_snapshotting)