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GSettingsBackend API/ABI change

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- add list() virtual method
  - add 'default_value' flag to read() call
This commit is contained in:
Ryan Lortie 2010-04-25 22:00:28 -05:00
parent 9ba690b386
commit 8dddf6499e
9 changed files with 96 additions and 35 deletions
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8
gio/gdelayedsettingsbackend.c
View File

@ -42,16 +42,18 @@ G_DEFINE_TYPE (GDelayedSettingsBackend,
static GVariant *
g_delayed_settings_backend_read (GSettingsBackend *backend,
const gchar *key,
const GVariantType *expected_type)
const GVariantType *expected_type,
gboolean default_value)
{
GDelayedSettingsBackend *delayed = G_DELAYED_SETTINGS_BACKEND (backend);
GVariant *result;
if ((result = g_tree_lookup (delayed->priv->delayed, key)))
if (!default_value &&
(result = g_tree_lookup (delayed->priv->delayed, key)))
return g_variant_ref (result);
return g_settings_backend_read (delayed->priv->backend,
key, expected_type);
key, expected_type, default_value);
}
static gboolean
g_delayed_settings_backend_write (GSettingsBackend *backend,

1
gio/gio.symbols
View File

@ -1387,6 +1387,7 @@ g_settings_backend_setup_keyfile
g_settings_backend_setup
g_settings_backend_get_type
g_settings_backend_changed
g_settings_backend_flatten_tree
g_settings_backend_keys_changed
g_settings_backend_path_changed
g_settings_backend_path_writable_changed

6
gio/gkeyfilesettingsbackend.c
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@ -54,11 +54,15 @@ struct _GKeyfileSettingsBackendPrivate
static GVariant *
g_keyfile_settings_backend_read (GSettingsBackend *backend,
const gchar *key,
const GVariantType *expected_type)
const GVariantType *expected_type,
gboolean default_value)
{
GKeyfileSettingsBackend *kf_backend = G_KEYFILE_SETTINGS_BACKEND (backend);
GVariant *value;
if (default_value)
return NULL;
value = g_hash_table_lookup (kf_backend->priv->table, key);
if (value != NULL)

7
gio/gmemorysettingsbackend.c
View File

@ -48,11 +48,14 @@ G_DEFINE_TYPE_WITH_CODE (GMemorySettingsBackend,
static GVariant *
g_memory_settings_backend_read (GSettingsBackend *backend,
const gchar *key,
const GVariantType *expected_type)
const GVariantType *expected_type,
gboolean default_value)
{
GMemorySettingsBackend *memory = G_MEMORY_SETTINGS_BACKEND (backend);
GVariant *value;
GMemorySettingsBackend *memory = G_MEMORY_SETTINGS_BACKEND (backend);
if (default_value)
return NULL;
value = g_hash_table_lookup (memory->table, key);

3
gio/gnullsettingsbackend.c
View File

@ -42,7 +42,8 @@ G_DEFINE_TYPE (GNullSettingsBackend,
static GVariant *
g_null_settings_backend_read (GSettingsBackend *backend,
const gchar *key,
const GVariantType *expected_type)
const GVariantType *expected_type,
gboolean default_value)
{
return NULL;
}

2
gio/gsettings.c
View File

@ -751,7 +751,7 @@ g_settings_get_value (GSettings *settings,
path = g_strconcat (settings->priv->path, key, NULL);
type = g_variant_get_type (sval);
value = g_settings_backend_read (settings->priv->backend, path, type);
value = g_settings_backend_read (settings->priv->backend, path, type, FALSE);
g_free (path);
if (options != NULL)

91
gio/gsettingsbackend.c
View File

@ -368,17 +368,18 @@ g_settings_backend_path_writable_changed (GSettingsBackend *backend,
typedef struct
{
const gchar **keys;
GVariant **values;
gint prefix_len;
gchar *prefix;
gchar **items;
} GetKeysState;
} FlattenState;
static gboolean
tree_get_keys (gpointer key,
gpointer value,
gpointer user_data)
g_settings_backend_flatten_one (gpointer key,
gpointer value,
gpointer user_data)
{
GetKeysState *state = user_data;
FlattenState *state = user_data;
const gchar *skey = key;
gint i;
@ -419,11 +420,60 @@ tree_get_keys (gpointer key,
/* save the entire item into the array.
* the prefixes will be removed later.
*/
*state->items++ = key;
*state->keys++ = key;
if (state->values)
*state->values++ = value;
return FALSE;
}
/**
* g_settings_backend_flatten_tree:
* @tree: a #GTree containing the changes
* @path: the location to save the path
* @keys: the location to save the relative keys
* @values: the location to save the values, or %NULL
*
* Calculate the longest common prefix of all keys in a tree and write
* out an array of the key names relative to that prefix and,
* optionally, the value to store at each of those keys.
*
* You must free the value returned in @path, @keys and @values using
* g_free(). You should not attempt to free or unref the contents of
* @keys or @values.
*
* Since: 2.26
**/
void
g_settings_backend_flatten_tree (GTree *tree,
gchar **path,
const gchar ***keys,
GVariant ***values)
{
FlattenState state = { 0, };
gsize nnodes;
gsize i;
nnodes = g_tree_nnodes (tree);
*keys = state.keys = g_new (const gchar *, nnodes + 1);
state.keys[nnodes] = NULL;
if (values != NULL)
{
*values = state.values = g_new (GVariant *, nnodes + 1);
state.values[nnodes] = NULL;
}
g_tree_foreach (tree, g_settings_backend_flatten_one, &state);
g_return_if_fail (*keys + nnodes == state.keys);
*path = state.prefix;
for (i = 0; i < nnodes; i++)
state.keys[i] += state.prefix_len;
}
/**
* g_settings_backend_changed_tree:
* @backend: a #GSettingsBackend implementation
@ -442,28 +492,18 @@ g_settings_backend_changed_tree (GSettingsBackend *backend,
gpointer origin_tag)
{
GSettingsBackendWatch *watch;
GetKeysState state = { 0, };
gchar **list;
const gchar **keys;
gchar *path;
g_return_if_fail (G_IS_SETTINGS_BACKEND (backend));
list = g_new (gchar *, g_tree_nnodes (tree) + 1);
state.items = list;
g_tree_foreach (tree, tree_get_keys, &state);
g_return_if_fail (list + g_tree_nnodes (tree) == state.items);
*state.items = NULL;
while (state.items-- != list)
*state.items += state.prefix_len;
g_settings_backend_flatten_tree (tree, &path, &keys, NULL);
for (watch = backend->priv->watches; watch; watch = watch->next)
watch->keys_changed (backend, state.prefix,
(const gchar * const *) list,
origin_tag, watch->user_data);
watch->keys_changed (backend, path, keys, origin_tag, watch->user_data);
g_free (list);
g_free (state.prefix);
g_free (path);
g_free (keys);
}
/*< private >
@ -487,10 +527,11 @@ g_settings_backend_changed_tree (GSettingsBackend *backend,
GVariant *
g_settings_backend_read (GSettingsBackend *backend,
const gchar *key,
const GVariantType *expected_type)
const GVariantType *expected_type,
gboolean default_value)
{
return G_SETTINGS_BACKEND_GET_CLASS (backend)
->read (backend, key, expected_type);
->read (backend, key, expected_type, default_value);
}
/*< private >

10
gio/gsettingsbackend.h
View File

@ -69,7 +69,11 @@ struct _GSettingsBackendClass
GVariant * (*read) (GSettingsBackend *backend,
const gchar *key,
const GVariantType *expected_type);
const GVariantType *expected_type,
gboolean default_value);
gchar ** (*list) (GSettingsBackend *backend,
const gchar *path,
gsize *length);
gboolean (*write) (GSettingsBackend *backend,
const gchar *key,
GVariant *value,
@ -112,6 +116,10 @@ void g_settings_backend_changed (GSettin
void g_settings_backend_path_changed (GSettingsBackend *backend,
const gchar *path,
gpointer origin_tag);
void g_settings_backend_flatten_tree (GTree *tree,
gchar **path,
const gchar ***keys,
GVariant ***values);
void g_settings_backend_keys_changed (GSettingsBackend *backend,
const gchar *path,
gchar const * const *items,

3
gio/gsettingsbackendinternal.h
View File

@ -67,7 +67,8 @@ GTree * g_settings_backend_create_tree (void);
G_GNUC_INTERNAL
GVariant * g_settings_backend_read (GSettingsBackend *backend,
const gchar *key,
const GVariantType *expected_type);
const GVariantType *expected_type,
gboolean default_value);
G_GNUC_INTERNAL
gboolean g_settings_backend_write (GSettingsBackend *backend,
const gchar *key,