[gnome-usage] Add support for GameMode

[Felipe Borges <felipeborges src gnome org>]

commit b8890b28f24d5b7d629adbd989d3b0bec3a781e1
Author: Christian Kellner <christian kellner me>
Date:   Mon Jul 15 19:26:13 2019 +0200

    Add support for GameMode
    
    Indicate if a process has requested GameMode by displaying the
    applications-games-symbolic icon next to the load level.

 data/ui/process-row.ui  |  16 +++++++
 src/app-item.vala       |   6 +++
 src/game-mode.vala      | 123 ++++++++++++++++++++++++++++++++++++++++++++++++
 src/meson.build         |   1 +
 src/process-row.vala    |   4 ++
 src/process.vala        |   2 +
 src/system-monitor.vala |   3 ++
 7 files changed, 155 insertions(+)
---
diff --git a/data/ui/process-row.ui b/data/ui/process-row.ui
index ab19f7c..eed02d2 100644
--- a/data/ui/process-row.ui
+++ b/data/ui/process-row.ui
@@ -57,6 +57,22 @@
                 <property name="position">3</property>
               </packing>
             </child>
+           <child>
+              <object class="GtkImage" id="gamemode">
+                <property name="visible">True</property>
+                <property name="can_focus">False</property>
+                <property name="margin_left">10</property>
+                <property name="margin_right">10</property>
+                <property name="pixel_size">24</property>
+                <property name="icon_name">applications-games-symbolic</property>
+              </object>
+              <packing>
+                <property name="expand">False</property>
+                <property name="fill">False</property>
+               <property name="pack_type">end</property>
+                <property name="position">3</property>
+              </packing>
+            </child>
             <child>
               <object class="GtkBox" id="user_tag_box">
                 <property name="visible">False</property>
diff --git a/src/app-item.vala b/src/app-item.vala
index 244218f..d25fb8c 100644
--- a/src/app-item.vala
+++ b/src/app-item.vala
@@ -9,6 +9,7 @@ namespace Usage
         public double cpu_load { get; private set; }
         public uint64 mem_usage { get; private set; }
         public Fdo.AccountsUser? user { get; private set; default = null; }
+        public bool gamemode {get; private set; }
 
         private static HashTable<string, AppInfo>? apps_info;
         private AppInfo? app_info = null;
@@ -37,6 +38,7 @@ namespace Usage
             display_name = find_display_name();
             processes.insert(process.pid, process);
             load_user_account.begin();
+            gamemode = process.gamemode;
         }
 
         public AppItem.system() {
@@ -85,6 +87,7 @@ namespace Usage
         public void remove_processes() {
             cpu_load = 0;
             mem_usage = 0;
+            int games = 0;
 
             foreach(var process in processes.get_values()) {
                 if(!process.mark_as_updated)
@@ -93,8 +96,11 @@ namespace Usage
                     cpu_load += process.cpu_load;
                     mem_usage += process.mem_usage;
                 }
+                if(process.gamemode)
+                    games++;
             }
 
+            gamemode = games > 0;
             cpu_load = double.min(100, cpu_load);
         }
 
diff --git a/src/game-mode.vala b/src/game-mode.vala
new file mode 100644
index 0000000..af85388
--- /dev/null
+++ b/src/game-mode.vala
@@ -0,0 +1,123 @@
+/* Generated by vala-dbus-binding-tool 1.0-aa2fb. Do not modify! Haha, but I did. Beat me! */
+/* Generated with: vala-dbus-binding-tool --no-synced --api-path=com.feralinteractive.GameMode.xml */
+using GLib;
+
+[DBus (name = "com.feralinteractive.GameMode.Game", timeout = 120000)]
+public interface GameMode.Game : GLib.Object {
+
+    [DBus (name = "ProcessId")]
+    public abstract int process_id {  get; }
+
+    [DBus (name = "Executable")]
+    public abstract string executable { owned get; }
+}
+
+[DBus (name = "com.feralinteractive.GameMode", timeout = 120000)]
+public interface GameMode.Client : GLib.Object {
+
+    [DBus (name = "ClientCount")]
+    public abstract int client_count {  get; }
+
+    [DBus (name = "RegisterGame")]
+    public abstract int register_game(int pid) throws DBusError, IOError;
+
+    [DBus (name = "UnregisterGame")]
+    public abstract int unregister_game(int pid) throws DBusError, IOError;
+
+    [DBus (name = "QueryStatus")]
+    public abstract int query_status(int pid) throws DBusError, IOError;
+
+    [DBus (name = "RegisterGameByPID")]
+    public abstract int register_game_by_pid(int pid, int requestor) throws DBusError, IOError;
+
+    [DBus (name = "UnregisterGameByPID")]
+    public abstract int unregister_game_by_pid(int pid, int requestor) throws DBusError, IOError;
+
+    [DBus (name = "QueryStatusByPID")]
+    public abstract int query_status_by_pid(int pid, int requestor) throws DBusError, IOError;
+
+    [DBus (name = "RefreshConfig")]
+    public abstract int refresh_config() throws DBusError, IOError;
+
+    [DBus (name = "ListGames")]
+    public abstract GameInfo[] list_games() throws DBusError, IOError;
+
+    [DBus (name = "GameRegistered")]
+    public signal void game_registered(int pid, GLib.ObjectPath path);
+
+    [DBus (name = "GameUnregistered")]
+    public signal void game_unregistered(int pid, GLib.ObjectPath path);
+}
+
+public struct GameMode.GameInfo {
+    public int pid;
+    public GLib.ObjectPath path;
+}
+
+public class GameMode.PidList : GLib.Object {
+
+    private Client client;
+    private HashTable<int, GLib.ObjectPath> _pids;
+
+    /* singelton */
+    private static PidList singelton;
+
+    public static PidList get_default() {
+        if (singelton == null)
+            singelton = new PidList();
+
+        return singelton;
+    }
+
+    /* construction */
+    construct {
+        _pids = new HashTable<int, GLib.ObjectPath>(direct_hash, direct_equal);
+    }
+
+    public PidList() {
+
+        try {
+            client = Bus.get_proxy_sync(BusType.SESSION,
+                                        "com.feralinteractive.GameMode",
+                                        "/com/feralinteractive/GameMode");
+
+            client.game_registered.connect(this.on_game_registered);
+            client.game_unregistered.connect(this.on_game_unregistered);
+
+            var games = client.list_games();
+            foreach (GameMode.GameInfo info in games) {
+                _pids.insert(info.pid, info.path);
+            }
+
+        } catch(IOError e) {
+            warning("GameMode Proxy creation failed: %s", e.message);
+        } catch(GLib.DBusError e) {
+            warning("GameMode D-Bus error: %s", e.message);
+        }
+    }
+
+    /* public */
+    public int[] pids {
+        owned get {
+            return _pids.get_keys_as_array();
+        }
+    }
+
+    public bool contains(int pid) {
+        return pid in _pids;
+    }
+
+    [Signal (detailed = true)]
+    public signal void changed(int pid, bool added);
+
+    /* Signals */
+    private void on_game_registered(int pid,  GLib.ObjectPath path) {
+        _pids.insert(pid, path);
+        changed["added"](pid, true);
+    }
+
+    private void on_game_unregistered(int pid, GLib.ObjectPath path) {
+        _pids.remove(pid);
+        changed["removed"](pid, false);
+    }
+}
\ No newline at end of file
diff --git a/src/meson.build b/src/meson.build
index 404a467..932fdfd 100644
--- a/src/meson.build
+++ b/src/meson.build
@@ -8,6 +8,7 @@ vala_sources = [
   'cpu-monitor.vala',
   'cpu-sub-view.vala',
   'gnome-usage.vala',
+  'game-mode.vala',
   'graph-box.vala',
   'graph-stacked-renderer.vala',
   'graph-stack-switcher.vala',
diff --git a/src/process-row.vala b/src/process-row.vala
index b9de945..e526501 100644
--- a/src/process-row.vala
+++ b/src/process-row.vala
@@ -39,6 +39,9 @@ namespace Usage
         [GtkChild]
         private Gtk.Box user_tag_box;
 
+        [GtkChild]
+        private Gtk.Image gamemode;
+
         [GtkChild]
         private Gtk.Label user_tag_label;
 
@@ -52,6 +55,7 @@ namespace Usage
             this.type = type;
             this.app = app;
             this.icon.gicon = app.get_icon();
+            this.app.bind_property("gamemode", gamemode, "visible", BindingFlags.SYNC_CREATE);
             update();
         }
 
diff --git a/src/process.vala b/src/process.vala
index 0f89c8f..890ac5a 100644
--- a/src/process.vala
+++ b/src/process.vala
@@ -34,6 +34,8 @@ namespace Usage
 
         public uint64 mem_usage { get; set; default = 0; }
 
+        public bool gamemode { get; set; }
+
         public bool mark_as_updated { get; set; default = true; }
         public ProcessStatus status { get; private set; default = ProcessStatus.SLEEPING; }
 
diff --git a/src/system-monitor.vala b/src/system-monitor.vala
index 30f9d37..d92752b 100644
--- a/src/system-monitor.vala
+++ b/src/system-monitor.vala
@@ -33,6 +33,7 @@ namespace Usage
 
         private CpuMonitor cpu_monitor;
         private MemoryMonitor memory_monitor;
+        private GameMode.PidList gamemode_pids;
 
         private HashTable<string, AppItem> app_table;
         private int process_mode = GTop.KERN_PROC_ALL;
@@ -63,6 +64,7 @@ namespace Usage
 
             cpu_monitor = new CpuMonitor();
             memory_monitor = new MemoryMonitor();
+            gamemode_pids = new GameMode.PidList();
 
             app_table = new HashTable<string, AppItem>(str_hash, str_equal);
             var settings = Settings.get_default();
@@ -157,6 +159,7 @@ namespace Usage
             cpu_monitor.update_process(ref process);
             memory_monitor.update_process(ref process);
             process.update_status();
+            process.gamemode = gamemode_pids.contains((int) process.pid);
         }
 
         private string? sanity_cmd(string commandline)