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add reset virtual method

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This commit is contained in:
Ryan Lortie
2010-04-15 09:56:54 -04:00
parent d8245e2b36
commit d04bc3b39d
5 changed files with 98 additions and 37 deletions
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26
gio/gsettings.c
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@@ -679,32 +679,10 @@ g_settings_get_value (GSettings *settings,
{
const gchar *category = g_variant_get_string (value, NULL);
if (strcmp (category, "ctype") == 0)
lc_category = LC_CTYPE;
else if (strcmp (category, "numeric") == 0)
lc_category = LC_NUMERIC;
if (strcmp (category, "message") == 0)
lc_category = LC_MESSAGES;
else if (strcmp (category, "time") == 0)
lc_category = LC_TIME;
else if (strcmp (category, "collate") == 0)
lc_category = LC_COLLATE;
else if (strcmp (category, "monetary") == 0)
lc_category = LC_MONETARY;
else if (strcmp (category, "messages") == 0)
lc_category = LC_MESSAGES;
else if (strcmp (category, "all") == 0)
lc_category = LC_ALL;
else if (strcmp (category, "paper") == 0)
lc_category = LC_PAPER;
else if (strcmp (category, "name") == 0)
lc_category = LC_NAME;
else if (strcmp (category, "address") == 0)
lc_category = LC_ADDRESS;
else if (strcmp (category, "telephone") == 0)
lc_category = LC_TELEPHONE;
else if (strcmp (category, "measurement") == 0)
lc_category = LC_MEASUREMENT;
else if (strcmp (category, "identification") == 0)
lc_category = LC_IDENTIFICATION;
else
g_error ("schema requests unsupported l10n category: %s",
category);

4
gio/gsettings.h
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@@ -93,6 +93,10 @@ void g_settings_get (GSettin
GSettings * g_settings_get_child (GSettings *settings,
const gchar *name);
void g_settings_reset (GSettings *settings,
const gchar *key);
void g_settings_reset_all (GSettings *settings);
gboolean g_settings_is_writable (GSettings *settings,
const gchar *name);

99
gio/gsettingsbackend.c
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@@ -367,12 +367,62 @@ g_settings_backend_path_writable_changed (GSettingsBackend *backend,
watch->path_writable_changed (backend, path, watch->user_data);
}
static gboolean
g_settings_backend_append_to_list (gpointer key,
gpointer value,
gpointer user_data)
typedef struct
{
return (*((*((gchar ***) user_data))++) = key, FALSE);
gint prefix_len;
gchar *prefix;
gchar **items;
} GetKeysState;
static gboolean
tree_get_keys (gpointer key,
gpointer value,
gpointer user_data)
{
GetKeysState *state = user_data;
const gchar *skey = key;
gint i;
g_return_val_if_fail (is_key (key), TRUE);
/* calculate longest common prefix */
if (state->prefix == NULL)
{
gchar *last_byte;
/* first key? just take the prefix up to the last '/' */
state->prefix = g_strdup (skey);
last_byte = strrchr (state->prefix, '/') + 1;
state->prefix_len = last_byte - state->prefix;
*last_byte = '\0';
}
else
{
/* find the first character that does not match. we will
* definitely find one because the prefix ends in '/' and the key
* does not. also: no two keys in the tree are the same.
*/
for (i = 0; state->prefix[i] == skey[i]; i++);
/* check if we need to shorten the prefix */
if (state->prefix[i] != '\0')
{
/* find the nearest '/', terminate after it */
while (state->prefix[i - 1] != '/')
i--;
state->prefix[i] = '\0';
state->prefix_len = i;
}
}
/* save the entire item into the array.
* the prefixes will be removed later.
*/
*state->items++ = key;
return FALSE;
}
/**
@@ -393,20 +443,21 @@ g_settings_backend_changed_tree (GSettingsBackend *backend,
gpointer origin_tag)
{
GSettingsBackendWatch *watch;
GetKeysState state = { 0, };
gchar **list;
list = g_new (gchar *, g_tree_nnodes (tree) + 1);
state.items = list;
{
gchar **ptr = list;
g_tree_foreach (tree, g_settings_backend_append_to_list, &ptr);
*ptr = NULL;
g_tree_foreach (tree, tree_get_keys, &state);
g_return_if_fail (list + g_tree_nnodes (tree) == state.items);
*state.items = NULL;
g_assert (list + g_tree_nnodes (tree) == ptr);
}
while (state.items-- != list)
*state.items += state.prefix_len;
for (watch = backend->priv->watches; watch; watch = watch->next)
watch->keys_changed (backend, "/",
watch->keys_changed (backend, state.prefix,
(const gchar * const *) list,
origin_tag, watch->user_data);
g_free (list);
@@ -502,10 +553,32 @@ g_settings_backend_write_keys (GSettingsBackend *backend,
->write_keys (backend, tree, origin_tag);
}
/*< private >
* g_settings_backend_reset:
* @backend: a #GSettingsBackend implementation
* @name: the name of a key or path
* @origin_tag: the origin tag
*
* "Resets" the named key or path. For a key this means that it is
* reverted to its "default" value (ie: after system-wide defaults,
* mandatory keys, etc. have been taken into account) or possibly unsets
* it.
*
* For paths, it means that every key under the path is reset.
*/
void
g_settings_backend_reset (GSettingsBackend *backend,
const gchar *name,
gpointer origin_tag)
{
G_SETTINGS_BACKEND_GET_CLASS (backend)
->reset (backend, name, origin_tag);
}
/*< private >
* g_settings_backend_get_writable:
* @backend: a #GSettingsBackend implementation
* @name: the name of a key, relative to the root of the backend
* @name: the name of a key
* @returns: %TRUE if the key is writable
*
* Finds out if a key is available for writing to. This is the

3
gio/gsettingsbackend.h
View File

@@ -77,6 +77,9 @@ struct _GSettingsBackendClass
void (*write_keys) (GSettingsBackend *backend,
GTree *tree,
gpointer origin_tag);
void (*reset) (GSettingsBackend *backend,
const gchar *name,
gpointer origin_tag);
gboolean (*get_writable) (GSettingsBackend *backend,
const gchar *name);
void (*subscribe) (GSettingsBackend *backend,

3
gio/gsettingsbackendinternal.h
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@@ -69,6 +69,9 @@ void g_settings_backend_write (GSettin
void g_settings_backend_write_keys (GSettingsBackend *backend,
GTree *tree,
gpointer origin_tag);
void g_settings_backend_reset (GSettingsBackend *backend,
const gchar *name,
gpointer origin_tag);
gboolean g_settings_backend_get_writable (GSettingsBackend *backend,
const char *name);