[gnome-games] runner: Add can_support_savestates property

[Alexander Mikhaylenko <alexm src gnome org>]

commit 9223932ae9e26af559833d6cacb5ad545bbe934b
Author: Yetizone <andreii lisita gmail com>
Date:   Thu Aug 8 12:08:09 2019 +0300

    runner: Add can_support_savestates property

 src/command/command-runner.vala | 4 ++++
 src/core/runner.vala            | 1 +
 src/dummy/dummy-runner.vala     | 4 ++++
 src/retro/retro-runner.vala     | 4 ++++
 4 files changed, 13 insertions(+)
---
diff --git a/src/command/command-runner.vala b/src/command/command-runner.vala
index 469a25de..9257cc58 100644
--- a/src/command/command-runner.vala
+++ b/src/command/command-runner.vala
@@ -17,6 +17,10 @@ public class Games.CommandRunner : Object, Runner {
                get { return false; }
        }
 
+       public bool can_support_savestates {
+               get { return false; }
+       }
+
        public MediaSet? media_set {
                get { return null; }
        }
diff --git a/src/core/runner.vala b/src/core/runner.vala
index c432ddca..cbecc5c9 100644
--- a/src/core/runner.vala
+++ b/src/core/runner.vala
@@ -7,6 +7,7 @@ public interface Games.Runner : Object {
        public abstract bool can_quit_safely { get; }
        public abstract bool can_resume { get; }
        public abstract bool supports_savestates { get; }
+       public abstract bool can_support_savestates { get; } // Now or in the future
        public abstract MediaSet? media_set { get; }
        public abstract InputMode input_mode { get; set; }
 
diff --git a/src/dummy/dummy-runner.vala b/src/dummy/dummy-runner.vala
index 3434727c..c64d1041 100644
--- a/src/dummy/dummy-runner.vala
+++ b/src/dummy/dummy-runner.vala
@@ -17,6 +17,10 @@ private class Games.DummyRunner : Object, Runner {
                get { return false; }
        }
 
+       public bool can_support_savestates {
+               get { return false; }
+       }
+
        public MediaSet? media_set {
                get { return null; }
        }
diff --git a/src/retro/retro-runner.vala b/src/retro/retro-runner.vala
index 432968f5..74d97627 100644
--- a/src/retro/retro-runner.vala
+++ b/src/retro/retro-runner.vala
@@ -20,6 +20,10 @@ public class Games.RetroRunner : Object, Runner {
                get { return core.get_can_access_state (); }
        }
 
+       public bool can_support_savestates {
+               get { return true; }
+       }
+
        private MediaSet _media_set;
        public MediaSet? media_set {
                get { return _media_set; }