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gnome-shell/src/shell-app-system.c
Florian Müllner b990ed2c23 app-system: Don't assume that gmenu_tree_load_sync() sets error 
The function may return FALSE without setting the GError, so don't
assume it is set to prevent a crash in that case. While at it, free
the GError we were leaking before.

https://bugzilla.gnome.org/show_bug.cgi?id=670418
2012-02-20 11:41:57 +01:00

835 lines
23 KiB
C
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/* -*- mode: C; c-file-style: "gnu"; indent-tabs-mode: nil; -*- */
#include "config.h"
#include "shell-app-system.h"
#include "shell-app-usage.h"
#include <string.h>
#include <gio/gio.h>
#include <gio/gdesktopappinfo.h>
#include <gtk/gtk.h>
#include <clutter/clutter.h>
#include <glib/gi18n.h>
#include <meta/display.h>
#include "shell-app-private.h"
#include "shell-window-tracker-private.h"
#include "shell-app-system-private.h"
#include "shell-global.h"
#include "shell-util.h"
#include "st.h"
/* Vendor prefixes are something that can be preprended to a .desktop
* file name. Undo this.
*/
static const char*const vendor_prefixes[] = { "gnome-",
"fedora-",
"mozilla-",
"debian-",
NULL };
enum {
PROP_0,
};
enum {
APP_STATE_CHANGED,
INSTALLED_CHANGED,
LAST_SIGNAL
};
static guint signals[LAST_SIGNAL] = { 0 };
struct _ShellAppSystemPrivate {
GMenuTree *apps_tree;
GHashTable *running_apps;
GHashTable *id_to_app;
GSList *known_vendor_prefixes;
GMenuTree *settings_tree;
GHashTable *setting_id_to_app;
};
static void shell_app_system_finalize (GObject *object);
static void on_apps_tree_changed_cb (GMenuTree *tree, gpointer user_data);
static void on_settings_tree_changed_cb (GMenuTree *tree, gpointer user_data);
G_DEFINE_TYPE(ShellAppSystem, shell_app_system, G_TYPE_OBJECT);
static void shell_app_system_class_init(ShellAppSystemClass *klass)
{
GObjectClass *gobject_class = (GObjectClass *)klass;
gobject_class->finalize = shell_app_system_finalize;
signals[APP_STATE_CHANGED] = g_signal_new ("app-state-changed",
SHELL_TYPE_APP_SYSTEM,
G_SIGNAL_RUN_LAST,
0,
NULL, NULL, NULL,
G_TYPE_NONE, 1,
SHELL_TYPE_APP);
signals[INSTALLED_CHANGED] =
g_signal_new ("installed-changed",
SHELL_TYPE_APP_SYSTEM,
G_SIGNAL_RUN_LAST,
G_STRUCT_OFFSET (ShellAppSystemClass, installed_changed),
NULL, NULL, NULL,
G_TYPE_NONE, 0);
g_type_class_add_private (gobject_class, sizeof (ShellAppSystemPrivate));
}
static void
shell_app_system_init (ShellAppSystem *self)
{
ShellAppSystemPrivate *priv;
self->priv = priv = G_TYPE_INSTANCE_GET_PRIVATE (self,
SHELL_TYPE_APP_SYSTEM,
ShellAppSystemPrivate);
priv->running_apps = g_hash_table_new_full (NULL, NULL, (GDestroyNotify) g_object_unref, NULL);
priv->id_to_app = g_hash_table_new_full (g_str_hash, g_str_equal,
NULL,
(GDestroyNotify)g_object_unref);
priv->setting_id_to_app = g_hash_table_new_full (g_str_hash, g_str_equal,
NULL,
(GDestroyNotify)g_object_unref);
/* For now, we want to pick up Evince, Nautilus, etc. We'll
* handle NODISPLAY semantics at a higher level or investigate them
* case by case.
*/
priv->apps_tree = gmenu_tree_new ("applications.menu", GMENU_TREE_FLAGS_INCLUDE_NODISPLAY);
g_signal_connect (priv->apps_tree, "changed", G_CALLBACK (on_apps_tree_changed_cb), self);
priv->settings_tree = gmenu_tree_new ("gnomecc.menu", 0);
g_signal_connect (priv->settings_tree, "changed", G_CALLBACK (on_settings_tree_changed_cb), self);
on_apps_tree_changed_cb (priv->apps_tree, self);
on_settings_tree_changed_cb (priv->settings_tree, self);
}
static void
shell_app_system_finalize (GObject *object)
{
ShellAppSystem *self = SHELL_APP_SYSTEM (object);
ShellAppSystemPrivate *priv = self->priv;
g_object_unref (priv->apps_tree);
g_object_unref (priv->settings_tree);
g_hash_table_destroy (priv->running_apps);
g_hash_table_destroy (priv->id_to_app);
g_hash_table_destroy (priv->setting_id_to_app);
g_slist_foreach (priv->known_vendor_prefixes, (GFunc)g_free, NULL);
g_slist_free (priv->known_vendor_prefixes);
priv->known_vendor_prefixes = NULL;
G_OBJECT_CLASS (shell_app_system_parent_class)->finalize (object);
}
static char *
get_prefix_for_entry (GMenuTreeEntry *entry)
{
char *prefix = NULL, *file_prefix = NULL;
const char *id;
GFile *file;
char *name;
int i = 0;
id = gmenu_tree_entry_get_desktop_file_id (entry);
file = g_file_new_for_path (gmenu_tree_entry_get_desktop_file_path (entry));
name = g_file_get_basename (file);
if (!name)
{
g_object_unref (file);
return NULL;
}
for (i = 0; vendor_prefixes[i]; i++)
{
if (g_str_has_prefix (name, vendor_prefixes[i]))
{
file_prefix = g_strdup (vendor_prefixes[i]);
break;
}
}
while (strcmp (name, id) != 0)
{
char *t;
char *pname;
GFile *parent = g_file_get_parent (file);
if (!parent)
{
g_warn_if_reached ();
break;
}
pname = g_file_get_basename (parent);
if (!pname)
{
g_object_unref (parent);
break;
}
if (!g_strstr_len (id, -1, pname))
{
/* handle <LegacyDir prefix="..."> */
char *t;
size_t name_len = strlen (name);
size_t id_len = strlen (id);
char *t_id = g_strdup (id);
t_id[id_len - name_len] = '\0';
t = g_strdup(t_id);
g_free (prefix);
g_free (t_id);
g_free (name);
name = g_strdup (id);
prefix = t;
g_object_unref (file);
file = parent;
g_free (pname);
g_free (file_prefix);
file_prefix = NULL;
break;
}
t = g_strconcat (pname, "-", name, NULL);
g_free (name);
name = t;
t = g_strconcat (pname, "-", prefix, NULL);
g_free (prefix);
prefix = t;
g_object_unref (file);
file = parent;
g_free (pname);
}
if (file)
g_object_unref (file);
if (strcmp (name, id) == 0)
{
g_free (name);
if (file_prefix && !prefix)
return file_prefix;
if (file_prefix)
{
char *t = g_strconcat (prefix, "-", file_prefix, NULL);
g_free (prefix);
g_free (file_prefix);
prefix = t;
}
return prefix;
}
g_free (name);
g_free (prefix);
g_free (file_prefix);
g_return_val_if_reached (NULL);
}
static void
get_flattened_entries_recurse (GMenuTreeDirectory *dir,
GHashTable *entry_set)
{
GMenuTreeIter *iter = gmenu_tree_directory_iter (dir);
GMenuTreeItemType next_type;
while ((next_type = gmenu_tree_iter_next (iter)) != GMENU_TREE_ITEM_INVALID)
{
gpointer item = NULL;
switch (next_type)
{
case GMENU_TREE_ITEM_ENTRY:
{
GMenuTreeEntry *entry;
item = entry = gmenu_tree_iter_get_entry (iter);
/* Key is owned by entry */
g_hash_table_replace (entry_set,
(char*)gmenu_tree_entry_get_desktop_file_id (entry),
gmenu_tree_item_ref (entry));
}
break;
case GMENU_TREE_ITEM_DIRECTORY:
{
item = gmenu_tree_iter_get_directory (iter);
get_flattened_entries_recurse ((GMenuTreeDirectory*)item, entry_set);
}
break;
default:
break;
}
if (item != NULL)
gmenu_tree_item_unref (item);
}
gmenu_tree_iter_unref (iter);
}
static GHashTable *
get_flattened_entries_from_tree (GMenuTree *tree)
{
GHashTable *table;
GMenuTreeDirectory *root;
table = g_hash_table_new_full (g_str_hash, g_str_equal,
(GDestroyNotify) NULL,
(GDestroyNotify) gmenu_tree_item_unref);
root = gmenu_tree_get_root_directory (tree);
if (root != NULL)
get_flattened_entries_recurse (root, table);
gmenu_tree_item_unref (root);
return table;
}
static void
on_apps_tree_changed_cb (GMenuTree *tree,
gpointer user_data)
{
ShellAppSystem *self = SHELL_APP_SYSTEM (user_data);
GError *error = NULL;
GHashTable *new_apps;
GHashTableIter iter;
gpointer key, value;
GSList *removed_apps = NULL;
GSList *removed_node;
g_assert (tree == self->priv->apps_tree);
g_slist_foreach (self->priv->known_vendor_prefixes, (GFunc)g_free, NULL);
g_slist_free (self->priv->known_vendor_prefixes);
self->priv->known_vendor_prefixes = NULL;
if (!gmenu_tree_load_sync (self->priv->apps_tree, &error))
{
if (error)
{
g_warning ("Failed to load apps: %s", error->message);
g_error_free (error);
}
else
{
g_warning ("Failed to load apps");
}
return;
}
new_apps = get_flattened_entries_from_tree (self->priv->apps_tree);
g_hash_table_iter_init (&iter, new_apps);
while (g_hash_table_iter_next (&iter, &key, &value))
{
const char *id = key;
GMenuTreeEntry *entry = value;
GMenuTreeEntry *old_entry;
char *prefix;
ShellApp *app;
prefix = get_prefix_for_entry (entry);
if (prefix != NULL
&& !g_slist_find_custom (self->priv->known_vendor_prefixes, prefix,
(GCompareFunc)g_strcmp0))
self->priv->known_vendor_prefixes = g_slist_append (self->priv->known_vendor_prefixes,
prefix);
else
g_free (prefix);
app = g_hash_table_lookup (self->priv->id_to_app, id);
if (app != NULL)
{
/* We hold a reference to the original entry temporarily,
* because otherwise the hash table would be referencing
* potentially free'd memory until we replace it below with
* the new data.
*/
old_entry = shell_app_get_tree_entry (app);
gmenu_tree_item_ref (old_entry);
_shell_app_set_entry (app, entry);
g_object_ref (app); /* Extra ref, removed in _replace below */
}
else
{
old_entry = NULL;
app = _shell_app_new (entry);
}
/* Note that "id" is owned by app->entry. Since we're always
* setting a new entry, even if the app already exists in the
* hash table we need to replace the key so that the new id
* string is pointed to.
*/
g_hash_table_replace (self->priv->id_to_app, (char*)id, app);
if (old_entry)
gmenu_tree_item_unref (old_entry);
}
/* Now iterate over the apps again; we need to unreference any apps
* which have been removed. The JS code may still be holding a
* reference; that's fine.
*/
g_hash_table_iter_init (&iter, self->priv->id_to_app);
while (g_hash_table_iter_next (&iter, &key, &value))
{
const char *id = key;
if (!g_hash_table_lookup (new_apps, id))
removed_apps = g_slist_prepend (removed_apps, (char*)id);
}
for (removed_node = removed_apps; removed_node; removed_node = removed_node->next)
{
const char *id = removed_node->data;
g_hash_table_remove (self->priv->id_to_app, id);
}
g_slist_free (removed_apps);
g_hash_table_destroy (new_apps);
g_signal_emit (self, signals[INSTALLED_CHANGED], 0);
}
static void
on_settings_tree_changed_cb (GMenuTree *tree,
gpointer user_data)
{
ShellAppSystem *self = SHELL_APP_SYSTEM (user_data);
GError *error = NULL;
GHashTable *new_settings;
GHashTableIter iter;
gpointer key, value;
g_assert (tree == self->priv->settings_tree);
g_hash_table_remove_all (self->priv->setting_id_to_app);
if (!gmenu_tree_load_sync (self->priv->settings_tree, &error))
{
if (error)
{
g_warning ("Failed to load apps: %s", error->message);
g_error_free (error);
}
else
{
g_warning ("Failed to load apps");
}
return;
}
new_settings = get_flattened_entries_from_tree (tree);
g_hash_table_iter_init (&iter, new_settings);
while (g_hash_table_iter_next (&iter, &key, &value))
{
const char *id = key;
GMenuTreeEntry *entry = value;
ShellApp *app;
app = _shell_app_new (entry);
g_hash_table_replace (self->priv->setting_id_to_app, (char*)id, app);
}
g_hash_table_destroy (new_settings);
}
/**
* shell_app_system_get_tree:
*
* Return Value: (transfer none): The #GMenuTree for apps
*/
GMenuTree *
shell_app_system_get_tree (ShellAppSystem *self)
{
return self->priv->apps_tree;
}
/**
* shell_app_system_get_settings_tree:
*
* Return Value: (transfer none): The #GMenuTree for apps
*/
GMenuTree *
shell_app_system_get_settings_tree (ShellAppSystem *self)
{
return self->priv->settings_tree;
}
/**
* shell_app_system_lookup_setting:
* @self:
* @id: desktop file id
*
* Returns: (transfer none): Application in gnomecc.menu, or %NULL if none
*/
ShellApp *
shell_app_system_lookup_setting (ShellAppSystem *self,
const char *id)
{
ShellApp *app;
/* Actually defer to the main app set if there's overlap */
app = shell_app_system_lookup_app (self, id);
if (app != NULL)
return app;
return g_hash_table_lookup (self->priv->setting_id_to_app, id);
}
/**
* shell_app_system_get_default:
*
* Return Value: (transfer none): The global #ShellAppSystem singleton
*/
ShellAppSystem *
shell_app_system_get_default ()
{
static ShellAppSystem *instance = NULL;
if (instance == NULL)
instance = g_object_new (SHELL_TYPE_APP_SYSTEM, NULL);
return instance;
}
/**
* shell_app_system_lookup_app:
*
* Find a #ShellApp corresponding to an id.
*
* Return value: (transfer none): The #ShellApp for id, or %NULL if none
*/
ShellApp *
shell_app_system_lookup_app (ShellAppSystem *self,
const char *id)
{
return g_hash_table_lookup (self->priv->id_to_app, id);
}
/**
* shell_app_system_lookup_app_by_tree_entry:
* @system: a #ShellAppSystem
* @entry: a #GMenuTreeEntry
*
* Find a #ShellApp corresponding to a #GMenuTreeEntry.
*
* Return value: (transfer none): The #ShellApp for @entry, or %NULL if none
*/
ShellApp *
shell_app_system_lookup_app_by_tree_entry (ShellAppSystem *self,
GMenuTreeEntry *entry)
{
/* If we looked up directly in ->entry_to_app, we'd lose the
* override of running apps. Thus, indirect through the id.
*/
return shell_app_system_lookup_app (self, gmenu_tree_entry_get_desktop_file_id (entry));
}
/**
* shell_app_system_lookup_app_for_path:
* @system: a #ShellAppSystem
* @desktop_path: (type utf8): UTF-8 encoded absolute file name
*
* Find or create a #ShellApp corresponding to a given absolute file
* name which must be in the standard paths (XDG_DATA_DIRS). For
* files outside the datadirs, this function returns %NULL.
*
* Return value: (transfer none): The #ShellApp for id, or %NULL if none
*/
ShellApp *
shell_app_system_lookup_app_for_path (ShellAppSystem *system,
const char *desktop_path)
{
const char *basename;
const char *app_path;
ShellApp *app;
basename = g_strrstr (desktop_path, "/");
if (basename)
basename += 1;
else
basename = desktop_path;
app = shell_app_system_lookup_app (system, basename);
if (!app)
return NULL;
app_path = gmenu_tree_entry_get_desktop_file_path (shell_app_get_tree_entry (app));
if (strcmp (desktop_path, app_path) != 0)
return NULL;
return app;
}
/**
* shell_app_system_lookup_heuristic_basename:
* @system: a #ShellAppSystem
* @id: Probable application identifier
*
* Find a valid application corresponding to a given
* heuristically determined application identifier
* string, or %NULL if none.
*
* Returns: (transfer none): A #ShellApp for @name
*/
ShellApp *
shell_app_system_lookup_heuristic_basename (ShellAppSystem *system,
const char *name)
{
ShellApp *result;
GSList *prefix;
result = shell_app_system_lookup_app (system, name);
if (result != NULL)
return result;
for (prefix = system->priv->known_vendor_prefixes; prefix; prefix = g_slist_next (prefix))
{
char *tmpid = g_strconcat ((char*)prefix->data, name, NULL);
result = shell_app_system_lookup_app (system, tmpid);
g_free (tmpid);
if (result != NULL)
return result;
}
return NULL;
}
/**
* shell_app_system_get_all:
* @self:
*
* Returns: (transfer container) (element-type ShellApp): All installed applications
*/
GSList *
shell_app_system_get_all (ShellAppSystem *self)
{
GSList *result = NULL;
GHashTableIter iter;
gpointer key, value;
g_hash_table_iter_init (&iter, self->priv->id_to_app);
while (g_hash_table_iter_next (&iter, &key, &value))
{
ShellApp *app = value;
if (!g_desktop_app_info_get_nodisplay (shell_app_get_app_info (app)))
result = g_slist_prepend (result, app);
}
return result;
}
void
_shell_app_system_notify_app_state_changed (ShellAppSystem *self,
ShellApp *app)
{
ShellAppState state = shell_app_get_state (app);
switch (state)
{
case SHELL_APP_STATE_RUNNING:
g_hash_table_insert (self->priv->running_apps, g_object_ref (app), NULL);
break;
case SHELL_APP_STATE_STARTING:
break;
case SHELL_APP_STATE_STOPPED:
g_hash_table_remove (self->priv->running_apps, app);
break;
}
g_signal_emit (self, signals[APP_STATE_CHANGED], 0, app);
}
/**
* shell_app_system_get_running:
* @self: A #ShellAppSystem
*
* Returns the set of applications which currently have at least one
* open window in the given context. The returned list will be sorted
* by shell_app_compare().
*
* Returns: (element-type ShellApp) (transfer container): Active applications
*/
GSList *
shell_app_system_get_running (ShellAppSystem *self)
{
gpointer key, value;
GSList *ret;
GHashTableIter iter;
g_hash_table_iter_init (&iter, self->priv->running_apps);
ret = NULL;
while (g_hash_table_iter_next (&iter, &key, &value))
{
ShellApp *app = key;
ret = g_slist_prepend (ret, app);
}
ret = g_slist_sort (ret, (GCompareFunc)shell_app_compare);
return ret;
}
static gint
compare_apps_by_usage (gconstpointer a,
gconstpointer b,
gpointer data)
{
ShellAppUsage *usage = shell_app_usage_get_default ();
ShellApp *app_a = (ShellApp*)a;
ShellApp *app_b = (ShellApp*)b;
return shell_app_usage_compare (usage, "", app_a, app_b);
}
static GSList *
sort_and_concat_results (ShellAppSystem *system,
GSList *prefix_matches,
GSList *substring_matches)
{
prefix_matches = g_slist_sort_with_data (prefix_matches,
compare_apps_by_usage,
system);
substring_matches = g_slist_sort_with_data (substring_matches,
compare_apps_by_usage,
system);
return g_slist_concat (prefix_matches, substring_matches);
}
/**
* normalize_terms:
* @terms: (element-type utf8): Input search terms
*
* Returns: (element-type utf8) (transfer full): Unicode-normalized and lowercased terms
*/
static GSList *
normalize_terms (GSList *terms)
{
GSList *normalized_terms = NULL;
GSList *iter;
for (iter = terms; iter; iter = iter->next)
{
const char *term = iter->data;
normalized_terms = g_slist_prepend (normalized_terms, shell_util_normalize_and_casefold (term));
}
return normalized_terms;
}
static GSList *
search_tree (ShellAppSystem *self,
GSList *terms,
GHashTable *apps)
{
GSList *prefix_results = NULL;
GSList *substring_results = NULL;
GSList *normalized_terms;
GHashTableIter iter;
gpointer key, value;
normalized_terms = normalize_terms (terms);
g_hash_table_iter_init (&iter, apps);
while (g_hash_table_iter_next (&iter, &key, &value))
{
const char *id = key;
ShellApp *app = value;
(void)id;
_shell_app_do_match (app, normalized_terms,
&prefix_results,
&substring_results);
}
g_slist_foreach (normalized_terms, (GFunc)g_free, NULL);
g_slist_free (normalized_terms);
return sort_and_concat_results (self, prefix_results, substring_results);
}
/**
* shell_app_system_initial_search:
* @system: A #ShellAppSystem
* @terms: (element-type utf8): List of terms, logical AND
*
* Search through applications for the given search terms.
*
* Returns: (transfer container) (element-type ShellApp): List of applications
*/
GSList *
shell_app_system_initial_search (ShellAppSystem *self,
GSList *terms)
{
return search_tree (self, terms, self->priv->id_to_app);
}
/**
* shell_app_system_subsearch:
* @system: A #ShellAppSystem
* @previous_results: (element-type ShellApp): List of previous results
* @terms: (element-type utf8): List of terms, logical AND
*
* Search through a previous result set; for more information, see
* js/ui/search.js. Note the value of @prefs must be
* the same as passed to shell_app_system_initial_search(). Note that returned
* strings are only valid until a return to the main loop.
*
* Returns: (transfer container) (element-type ShellApp): List of application identifiers
*/
GSList *
shell_app_system_subsearch (ShellAppSystem *system,
GSList *previous_results,
GSList *terms)
{
GSList *iter;
GSList *prefix_results = NULL;
GSList *substring_results = NULL;
GSList *normalized_terms = normalize_terms (terms);
for (iter = previous_results; iter; iter = iter->next)
{
ShellApp *app = iter->data;
_shell_app_do_match (app, normalized_terms,
&prefix_results,
&substring_results);
}
g_slist_foreach (normalized_terms, (GFunc)g_free, NULL);
g_slist_free (normalized_terms);
/* Note that a shorter term might have matched as a prefix, but
when extended only as a substring, so we have to redo the
sort rather than reusing the existing ordering */
return sort_and_concat_results (system, prefix_results, substring_results);
}
/**
* shell_app_system_search_settings:
* @system: A #ShellAppSystem
* @terms: (element-type utf8): List of terms, logical AND
*
* Search through settings for the given search terms.
*
* Returns: (transfer container) (element-type ShellApp): List of setting applications
*/
GSList *
shell_app_system_search_settings (ShellAppSystem *self,
GSList *terms)
{
return search_tree (self, terms, self->priv->setting_id_to_app);
}
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