[gnome-games] steam: Add SteamIcon

[Adrien Plazas <aplazas src gnome org>]

commit 69ed1cf9035cc2754b82768ee28fdeda2d25a32b
Author: Adrien Plazas <kekun plazas laposte net>
Date:   Wed May 11 23:33:13 2016 +0200

    steam: Add SteamIcon
    
    This will be used in subsequent commits to represent Steam games icons.

 plugins/steam/src/Makefile.am     |    1 +
 plugins/steam/src/steam-icon.vala |   43 +++++++++++++++++++++++++++++++++++++
 2 files changed, 44 insertions(+), 0 deletions(-)
---
diff --git a/plugins/steam/src/Makefile.am b/plugins/steam/src/Makefile.am
index e081305..3f21aff 100644
--- a/plugins/steam/src/Makefile.am
+++ b/plugins/steam/src/Makefile.am
@@ -8,6 +8,7 @@ libgames_steam_plugin_la_DEPENDENCIES = \
 libgames_steam_plugin_la_SOURCES = \
        steam-game.vala \
        steam-game-source.vala \
+       steam-icon.vala \
        steam-plugin.vala \
        steam-registry.vala \
        steam-runner.vala \
diff --git a/plugins/steam/src/steam-icon.vala b/plugins/steam/src/steam-icon.vala
new file mode 100644
index 0000000..479d26e
--- /dev/null
+++ b/plugins/steam/src/steam-icon.vala
@@ -0,0 +1,43 @@
+// This file is part of GNOME Games. License: GPLv3
+
+private class Games.SteamIcon : Object, Icon {
+       private static GLib.Icon? steam_icon;
+
+       private string game_id;
+       private GLib.Icon? icon;
+       private bool searched;
+
+       static construct {
+               try {
+                       steam_icon = GLib.Icon.new_for_string ("steam");
+               }
+               catch (Error e) {
+                       warning ("%s\n", e.message);
+               }
+       }
+
+       public SteamIcon (string game_id) {
+               this.game_id = game_id;
+
+               searched = false;
+       }
+
+       public GLib.Icon? get_icon () {
+               if (searched)
+                       return icon ?? steam_icon;
+
+               searched = true;
+
+               try {
+                       var icon_name = "steam_icon_" + game_id;
+                       var theme = Gtk.IconTheme.get_default ();
+                       if (theme.has_icon (icon_name))
+                               icon = GLib.Icon.new_for_string (icon_name);
+               }
+               catch (Error e) {
+                       warning ("%s\n", e.message);
+               }
+
+               return icon ?? steam_icon;
+       }
+}