[gnome-shell] app-system: Add back StartupWMClass matching

[Jasper St. Pierre <jstpierre src gnome org>]

commit ad03fb081525b9461f694a7b1d8adbef9a0a99b0
Author: Jasper St. Pierre <jstpierre mecheye net>
Date:   Thu Sep 26 17:19:21 2013 -0400

    app-system: Add back StartupWMClass matching
    
    While unfortunate that we still have to scan all apps with get_all(),
    support for this feature will be short-lived, so hopefully we can drop
    it in the future as new apps adapt to the desktop file / app ID
    recommendations.
    
    For now, simply scan all desktop IDs.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=711631

 src/shell-app-system.c |   25 +++++++++++++++++++++++++
 1 files changed, 25 insertions(+), 0 deletions(-)
---
diff --git a/src/shell-app-system.c b/src/shell-app-system.c
index d9c57e0..feca09c 100644
--- a/src/shell-app-system.c
+++ b/src/shell-app-system.c
@@ -72,11 +72,36 @@ static void shell_app_system_class_init(ShellAppSystemClass *klass)
 }
 
 static void
+scan_startup_wm_class_to_id (ShellAppSystem *self)
+{
+  ShellAppSystemPrivate *priv = self->priv;
+  GList *apps, *l;
+
+  g_hash_table_remove_all (priv->startup_wm_class_to_id);
+
+  apps = g_app_info_get_all ();
+  for (l = apps; l != NULL; l = l->next)
+    {
+      GAppInfo *info = l->data;
+      const char *startup_wm_class, *id;
+
+      id = g_app_info_get_id (info);
+      startup_wm_class = g_desktop_app_info_get_startup_wm_class (G_DESKTOP_APP_INFO (info));
+      if (startup_wm_class != NULL)
+        g_hash_table_insert (priv->startup_wm_class_to_id, (char *) startup_wm_class, (char *) id);
+    }
+
+  g_list_free_full (apps, g_object_unref);
+}
+
+static void
 installed_changed (GAppInfoMonitor *monitor,
                    gpointer         user_data)
 {
   ShellAppSystem *self = user_data;
 
+  scan_startup_wm_class_to_id (self);
+
   g_signal_emit (self, signals[INSTALLED_CHANGED], 0, NULL);
 }