[gnome-games] display-view: Add shortcuts for controlling savestates

[Alexander Mikhaylenko <alexm src gnome org>]

commit 053afd44706d52807cc0e6242d8be09e88658612
Author: Yetizone <andreii lisita gmail com>
Date:   Mon Aug 12 18:52:52 2019 +0300

    display-view: Add shortcuts for controlling savestates
    
    Ctrl+A or F4 => Reveal the savestates menu
    Esc or Alt+left arrow => Hide the savestates menu if it's open
    Ctrl+S or F2 => Create new savestate
    Ctrl+d or F3 => Load latest savestate

 src/ui/display-view.vala | 70 ++++++++++++++++++++++++++++++++++++++++++++----
 1 file changed, 65 insertions(+), 5 deletions(-)
---
diff --git a/src/ui/display-view.vala b/src/ui/display-view.vala
index 89a8d75b..adf874ef 100644
--- a/src/ui/display-view.vala
+++ b/src/ui/display-view.vala
@@ -101,9 +101,9 @@ private class Games.DisplayView : Object, UiView {
                var keymap = Gdk.Keymap.get_for_display (window.get_display ());
                keymap.translate_keyboard_state (event.hardware_keycode, event.state,
                                                 event.group, out keyval, null, null, null);
+               var ctrl_pressed = (event.state & default_modifiers) == Gdk.ModifierType.CONTROL_MASK;
 
-               if ((keyval == Gdk.Key.f || keyval == Gdk.Key.F) &&
-                   (event.state & default_modifiers) == Gdk.ModifierType.CONTROL_MASK &&
+               if ((keyval == Gdk.Key.f || keyval == Gdk.Key.F) && ctrl_pressed &&
                    header_bar.can_fullscreen && !savestates_list_state.is_revealed) {
                        is_fullscreen = !is_fullscreen;
                        settings.set_boolean ("fullscreen", is_fullscreen);
@@ -119,9 +119,8 @@ private class Games.DisplayView : Object, UiView {
                        return true;
                }
 
-               if (keyval == Gdk.Key.Escape && header_bar.can_fullscreen) {
-                       is_fullscreen = false;
-                       settings.set_boolean ("fullscreen", false);
+               if (keyval == Gdk.Key.Escape) {
+                       on_escape_key_pressed ();
 
                        return true;
                }
@@ -134,9 +133,70 @@ private class Games.DisplayView : Object, UiView {
                        return true;
                }
 
+               // Shortcuts for the Savestates manager
+               if (savestates_list_state.is_revealed)
+                       return false;
+
+               if (((keyval == Gdk.Key.a || keyval == Gdk.Key.A) && ctrl_pressed) ||
+                    (keyval == Gdk.Key.F4)) {
+                       savestates_list_state.is_revealed = true;
+
+                       return true;
+               }
+
+               if (((keyval == Gdk.Key.s || keyval == Gdk.Key.S) && ctrl_pressed) ||
+                    (keyval == Gdk.Key.F2)){
+                       create_new_savestate ();
+
+                       return true;
+               }
+
+               if ((keyval == Gdk.Key.d || keyval == Gdk.Key.D) && ctrl_pressed ||
+                   (keyval == Gdk.Key.F3)) {
+                       load_latest_savestate ();
+
+                       return true;
+               }
+
                return false;
        }
 
+       private void on_escape_key_pressed () {
+               if (savestates_list_state.is_revealed)
+                       on_display_back (); // Hide Savestates menu
+               else if (header_bar.can_fullscreen) {
+                       is_fullscreen = false;
+                       settings.set_boolean ("fullscreen", false);
+               }
+       }
+
+       private void create_new_savestate () {
+               box.runner.pause ();
+               box.runner.try_create_savestate (false);
+               box.runner.resume ();
+               box.runner.get_display ().grab_focus ();
+       }
+
+       private void load_latest_savestate () {
+               var savestates = box.runner.get_savestates ();
+
+               if (savestates.length == 0)
+                       return;
+
+               box.runner.pause ();
+               box.runner.preview_savestate (savestates[0]);
+
+               try {
+                       box.runner.load_previewed_savestate ();
+               }
+               catch (Error e) {
+                       warning ("Failed to load savestate: %s", e.message);
+               }
+
+               box.runner.resume ();
+               box.runner.get_display ().grab_focus ();
+       }
+
        public bool gamepad_button_press_event (Manette.Event event) {
                if (resume_dialog != null)
                        return resume_dialog.is_active && resume_dialog.gamepad_button_press_event (event);