Get categories from the desktop files for all applications

and use them when finding matching applications for the search in the overlay mode.

svn path=/trunk/; revision=159

js/ui/appDisplay.js

@@ -110,6 +110,10 @@ AppDisplay.prototype = {
 
     _init : function(width, height) {
         GenericDisplay.GenericDisplay.prototype._init.call(this, width, height);
+
+        // map<itemId, array of category names>
+        this._categories = {};
+  
         let me = this;
         this._appMonitor = new Shell.AppMonitor();
         this._appsStale = true;
@@ -134,11 +138,15 @@ AppDisplay.prototype = {
         if (!this._appsStale)
             return;
         this._allItems = {};
+        this._categories = {}; 
         let apps = Gio.app_info_get_all();
         for (let i = 0; i < apps.length; i++) {
             let appInfo = apps[i];
             let appId = appInfo.get_id();
             this._allItems[appId] = appInfo;
+            // [] is returned if we could not get the categories or the list of categories was empty
+            let categories = Shell.get_categories_for_desktop_file(appId);
+            this._categories[appId] = categories;
         }
         this._appsStale = false;
     },
@@ -169,24 +177,36 @@ AppDisplay.prototype = {
     },
 
     // Checks if the item info can be a match for the search string by checking
-    // the name, description, and execution command for the application. 
+    // the name, description, execution command, and categories for the application. 
     // Item info is expected to be GAppInfo.
     // Returns a boolean flag indicating if itemInfo is a match.
     _isInfoMatching : function(itemInfo, search) {
         if (search == null || search == '')
             return true;
+
         let name = itemInfo.get_name().toLowerCase();
         if (name.indexOf(search) >= 0)
             return true;
+
         let description = itemInfo.get_description();
         if (description) {
             description = description.toLowerCase();
             if (description.indexOf(search) >= 0)
                 return true;
         }
+
         let exec = itemInfo.get_executable().toLowerCase();
         if (exec.indexOf(search) >= 0)
             return true;
+        
+        // we expect this._categories.hasOwnProperty(itemInfo.get_id()) to always be true here     
+        let categories = this._categories[itemInfo.get_id()]; 
+        for (let i = 0; i < categories.length; i++) {
+            let category = categories[i].toLowerCase();
+            if (category.indexOf(search) >= 0)
+                return true;
+        }
+       
         return false;
     },
 

src/shell-global.c

@@ -9,8 +9,6 @@
 #include <errno.h>
 #include <stdlib.h>
 #include <string.h>
-#include <math.h>
-#include <libgnomeui-2.0/libgnomeui/gnome-thumbnail.h>
 #include <dbus/dbus-glib.h>
 #include <libgnomeui/gnome-thumbnail.h>
 
@@ -222,6 +220,49 @@ shell_global_class_init (ShellGlobalClass *klass)
                                                         G_PARAM_READABLE));
 }
 
+/**
+ * search_path_init:
+ *
+ * search_path_init and get_applications_search_path below were copied from glib/gio/gdesktopappinfo.c
+ * copyright Red Hat, Inc., written by Alex Larsson, licensed under the LGPL
+ *
+ * Return value: location of an array with user and system application directories.
+ */ 
+static gpointer
+search_path_init (gpointer data)
+{ 	
+    char **args = NULL;
+    const char * const *data_dirs;
+    const char *user_data_dir;
+    int i, length, j;
+ 	 
+    data_dirs = g_get_system_data_dirs ();
+    length = g_strv_length ((char **)data_dirs);
+ 	
+    args = g_new (char *, length + 2);
+ 	
+    j = 0;
+    user_data_dir = g_get_user_data_dir ();
+    args[j++] = g_build_filename (user_data_dir, "applications", NULL);
+    for (i = 0; i < length; i++)
+      args[j++] = g_build_filename (data_dirs[i],
+ 	                            "applications", NULL);
+    args[j++] = NULL;
+ 	 	
+    return args;
+}
+/**
+ * get_applications_search_path:
+ *
+ * Return value: location of an array with user and system application directories.
+ */
+static const char * const *
+get_applications_search_path (void)
+{
+    static GOnce once_init = G_ONCE_INIT;
+    return g_once (&once_init, search_path_init, NULL);
+} 
+
 /**
  * shell_clutter_texture_set_from_pixbuf: 
  * texture: #ClutterTexture to be modified
@@ -298,6 +339,68 @@ shell_get_thumbnail_for_recent_info(GtkRecentInfo  *recent_info)
     return pixbuf;   
 }
 
+/**
+ * shell_get_categories_for_desktop_file:
+ *
+ * @desktop_file_name: name of the desktop file for which to retrieve categories
+ *
+ * Return value: (element-type char*) (transfer full): List of categories
+ *
+ */
+GSList *
+shell_get_categories_for_desktop_file(const char *desktop_file_name)
+{
+    GKeyFile *key_file;
+    const char * const *search_dirs;
+    char **categories = NULL;
+    GSList *categories_list = NULL; 
+    char *full_path = NULL;   
+    GError *error = NULL;
+    gsize len;  
+    int i; 
+
+    key_file = g_key_file_new (); 
+    search_dirs = get_applications_search_path();
+   
+    g_key_file_load_from_dirs (key_file, desktop_file_name, (const char **)search_dirs, &full_path, 0, &error);
+
+    if (error != NULL) 
+      {
+        g_warning ("Error when loading a key file for %s: %s", desktop_file_name, error->message);
+        g_clear_error (&error);
+      }
+    else 
+      {
+        categories = g_key_file_get_string_list (key_file,
+                                                 "Desktop Entry",
+                                                 "Categories",
+                                                 &len,
+                                                 &error);
+        if (error != NULL)
+          {
+            g_warning ("Error when getting 'Categories' from a key file %s: %s", desktop_file_name, error->message);
+            g_clear_error (&error);
+          } 
+      }
+
+    g_key_file_free (key_file);
+ 
+    if (categories == NULL)
+      return NULL;
+
+    // gjs currently does not support returning arrays (other than a NULL value for an array), so we need 
+    // to convert the array we are returning to GSList, returning which gjs supports. 
+    // See http://bugzilla.gnome.org/show_bug.cgi?id=560567 for more info on gjs array support.
+    for (i = 0; categories[i]; i++)
+      {
+        categories_list = g_slist_prepend (categories_list, g_strdup (categories[i])); 
+      }
+
+    g_strfreev (categories);
+
+    return categories_list;
+}
+
 /**
  * shell_global_get:
  *

src/shell-global.h

@@ -36,6 +36,8 @@ gboolean shell_clutter_texture_set_from_pixbuf (ClutterTexture *texture,
 
 GdkPixbuf *shell_get_thumbnail_for_recent_info(GtkRecentInfo  *recent_info);
 
+GSList *shell_get_categories_for_desktop_file(const char *desktop_file_name);
+
 ShellGlobal *shell_global_get (void);
 
 void shell_global_grab_dbus_service (ShellGlobal *global);