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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
#include "nsGSettingsService.h"
#include "nsString.h"
#include "nsCOMPtr.h"
#include "prlink.h"
#include "nsComponentManagerUtils.h"
#include "nsIMutableArray.h"
#include "nsISupportsPrimitives.h"
#include <glib.h>
#include <glib-object.h>
using namespace mozilla;
typedef struct _GSettings GSettings;
typedef struct _GVariantType GVariantType;
typedef struct _GVariant GVariant;
#ifndef G_VARIANT_TYPE_INT32
# define G_VARIANT_TYPE_INT32 ((const GVariantType*)"i")
# define G_VARIANT_TYPE_BOOLEAN ((const GVariantType*)"b")
# define G_VARIANT_TYPE_STRING ((const GVariantType*)"s")
# define G_VARIANT_TYPE_OBJECT_PATH ((const GVariantType*)"o")
# define G_VARIANT_TYPE_SIGNATURE ((const GVariantType*)"g")
#endif
#ifndef G_VARIANT_TYPE_STRING_ARRAY
# define G_VARIANT_TYPE_STRING_ARRAY ((const GVariantType*)"as")
#endif
#define GSETTINGS_FUNCTIONS \
FUNC(g_settings_new, GSettings*, (const char* schema)) \
FUNC(g_settings_list_schemas, const char* const*, (void)) \
FUNC(g_settings_list_keys, char**, (GSettings * settings)) \
FUNC(g_settings_get_value, GVariant*, \
(GSettings * settings, const char* key)) \
FUNC(g_settings_set_value, gboolean, \
(GSettings * settings, const char* key, GVariant* value)) \
FUNC(g_settings_range_check, gboolean, \
(GSettings * settings, const char* key, GVariant* value)) \
FUNC(g_variant_get_int32, gint32, (GVariant * variant)) \
FUNC(g_variant_get_boolean, gboolean, (GVariant * variant)) \
FUNC(g_variant_get_string, const char*, (GVariant * value, gsize * length)) \
FUNC(g_variant_get_strv, const char**, (GVariant * value, gsize * length)) \
FUNC(g_variant_is_of_type, gboolean, \
(GVariant * value, const GVariantType* type)) \
FUNC(g_variant_new_int32, GVariant*, (gint32 value)) \
FUNC(g_variant_new_boolean, GVariant*, (gboolean value)) \
FUNC(g_variant_new_string, GVariant*, (const char* string)) \
FUNC(g_variant_unref, void, (GVariant * value))
#define FUNC(name, type, params) \
typedef type(*_##name##_fn) params; \
static _##name##_fn _##name;
GSETTINGS_FUNCTIONS
#undef FUNC
#define g_settings_new _g_settings_new
#define g_settings_list_schemas _g_settings_list_schemas
#define g_settings_list_keys _g_settings_list_keys
#define g_settings_get_value _g_settings_get_value
#define g_settings_set_value _g_settings_set_value
#define g_settings_range_check _g_settings_range_check
#define g_variant_get_int32 _g_variant_get_int32
#define g_variant_get_boolean _g_variant_get_boolean
#define g_variant_get_string _g_variant_get_string
#define g_variant_get_strv _g_variant_get_strv
#define g_variant_is_of_type _g_variant_is_of_type
#define g_variant_new_int32 _g_variant_new_int32
#define g_variant_new_boolean _g_variant_new_boolean
#define g_variant_new_string _g_variant_new_string
#define g_variant_unref _g_variant_unref
static PRLibrary* gioLib = nullptr;
class nsGSettingsCollection final : public nsIGSettingsCollection {
public:
NS_DECL_ISUPPORTS
NS_DECL_NSIGSETTINGSCOLLECTION
explicit nsGSettingsCollection(GSettings* aSettings)
: mSettings(aSettings), mKeys(nullptr) {}
private:
~nsGSettingsCollection();
bool KeyExists(const nsACString& aKey);
bool SetValue(const nsACString& aKey, GVariant* aValue);
GSettings* mSettings;
char** mKeys;
};
nsGSettingsCollection::~nsGSettingsCollection() {
g_strfreev(mKeys);
g_object_unref(mSettings);
}
bool nsGSettingsCollection::KeyExists(const nsACString& aKey) {
if (!mKeys) mKeys = g_settings_list_keys(mSettings);
for (uint32_t i = 0; mKeys[i] != nullptr; i++) {
if (aKey.Equals(mKeys[i])) return true;
}
return false;
}
bool nsGSettingsCollection::SetValue(const nsACString& aKey, GVariant* aValue) {
if (!KeyExists(aKey) ||
!g_settings_range_check(mSettings, PromiseFlatCString(aKey).get(),
aValue)) {
g_variant_unref(aValue);
return false;
}
return g_settings_set_value(mSettings, PromiseFlatCString(aKey).get(),
aValue);
}
NS_IMPL_ISUPPORTS(nsGSettingsCollection, nsIGSettingsCollection)
NS_IMETHODIMP
nsGSettingsCollection::SetString(const nsACString& aKey,
const nsACString& aValue) {
GVariant* value = g_variant_new_string(PromiseFlatCString(aValue).get());
if (!value) return NS_ERROR_OUT_OF_MEMORY;
bool res = SetValue(aKey, value);
return res ? NS_OK : NS_ERROR_FAILURE;
}
NS_IMETHODIMP
nsGSettingsCollection::SetBoolean(const nsACString& aKey, bool aValue) {
GVariant* value = g_variant_new_boolean(aValue);
if (!value) return NS_ERROR_OUT_OF_MEMORY;
bool res = SetValue(aKey, value);
return res ? NS_OK : NS_ERROR_FAILURE;
}
NS_IMETHODIMP
nsGSettingsCollection::SetInt(const nsACString& aKey, int32_t aValue) {
GVariant* value = g_variant_new_int32(aValue);
if (!value) return NS_ERROR_OUT_OF_MEMORY;
bool res = SetValue(aKey, value);
return res ? NS_OK : NS_ERROR_FAILURE;
}
NS_IMETHODIMP
nsGSettingsCollection::GetString(const nsACString& aKey, nsACString& aResult) {
if (!KeyExists(aKey)) return NS_ERROR_INVALID_ARG;
GVariant* value =
g_settings_get_value(mSettings, PromiseFlatCString(aKey).get());
if (!g_variant_is_of_type(value, G_VARIANT_TYPE_STRING) &&
!g_variant_is_of_type(value, G_VARIANT_TYPE_OBJECT_PATH) &&
!g_variant_is_of_type(value, G_VARIANT_TYPE_SIGNATURE)) {
g_variant_unref(value);
return NS_ERROR_FAILURE;
}
aResult.Assign(g_variant_get_string(value, nullptr));
g_variant_unref(value);
return NS_OK;
}
NS_IMETHODIMP
nsGSettingsCollection::GetBoolean(const nsACString& aKey, bool* aResult) {
NS_ENSURE_ARG_POINTER(aResult);
if (!KeyExists(aKey)) return NS_ERROR_INVALID_ARG;
GVariant* value =
g_settings_get_value(mSettings, PromiseFlatCString(aKey).get());
if (!g_variant_is_of_type(value, G_VARIANT_TYPE_BOOLEAN)) {
g_variant_unref(value);
return NS_ERROR_FAILURE;
}
gboolean res = g_variant_get_boolean(value);
*aResult = res ? true : false;
g_variant_unref(value);
return NS_OK;
}
NS_IMETHODIMP
nsGSettingsCollection::GetInt(const nsACString& aKey, int32_t* aResult) {
NS_ENSURE_ARG_POINTER(aResult);
if (!KeyExists(aKey)) return NS_ERROR_INVALID_ARG;
GVariant* value =
g_settings_get_value(mSettings, PromiseFlatCString(aKey).get());
if (!g_variant_is_of_type(value, G_VARIANT_TYPE_INT32)) {
g_variant_unref(value);
return NS_ERROR_FAILURE;
}
*aResult = g_variant_get_int32(value);
g_variant_unref(value);
return NS_OK;
}
// These types are local to nsGSettingsService::Init, but ISO C++98 doesn't
// allow a template (ArrayLength) to be instantiated based on a local type.
// Boo-urns!
typedef void (*nsGSettingsFunc)();
struct nsGSettingsDynamicFunction {
const char* functionName;
nsGSettingsFunc* function;
};
NS_IMETHODIMP
nsGSettingsCollection::GetStringList(const nsACString& aKey,
nsIArray** aResult) {
if (!KeyExists(aKey)) return NS_ERROR_INVALID_ARG;
nsCOMPtr<nsIMutableArray> items(do_CreateInstance(NS_ARRAY_CONTRACTID));
if (!items) {
return NS_ERROR_OUT_OF_MEMORY;
}
GVariant* value =
g_settings_get_value(mSettings, PromiseFlatCString(aKey).get());
if (!g_variant_is_of_type(value, G_VARIANT_TYPE_STRING_ARRAY)) {
g_variant_unref(value);
return NS_ERROR_FAILURE;
}
const gchar** gs_strings = g_variant_get_strv(value, nullptr);
if (!gs_strings) {
// empty array
items.forget(aResult);
g_variant_unref(value);
return NS_OK;
}
const gchar** p_gs_strings = gs_strings;
while (*p_gs_strings != nullptr) {
nsCOMPtr<nsISupportsCString> obj(
do_CreateInstance(NS_SUPPORTS_CSTRING_CONTRACTID));
if (obj) {
obj->SetData(nsDependentCString(*p_gs_strings));
items->AppendElement(obj);
}
p_gs_strings++;
}
g_free(gs_strings);
items.forget(aResult);
g_variant_unref(value);
return NS_OK;
}
nsresult nsGSettingsService::Init() {
#define FUNC(name, type, params) {#name, (nsGSettingsFunc*)&_##name},
static const nsGSettingsDynamicFunction kGSettingsSymbols[] = {
GSETTINGS_FUNCTIONS};
#undef FUNC
if (!gioLib) {
gioLib = PR_LoadLibrary("libgio-2.0.so.0");
if (!gioLib) return NS_ERROR_FAILURE;
}
for (auto GSettingsSymbol : kGSettingsSymbols) {
*GSettingsSymbol.function =
PR_FindFunctionSymbol(gioLib, GSettingsSymbol.functionName);
if (!*GSettingsSymbol.function) {
return NS_ERROR_FAILURE;
}
}
return NS_OK;
}
NS_IMPL_ISUPPORTS(nsGSettingsService, nsIGSettingsService)
nsGSettingsService::~nsGSettingsService() {
if (gioLib) {
PR_UnloadLibrary(gioLib);
gioLib = nullptr;
}
}
NS_IMETHODIMP
nsGSettingsService::GetCollectionForSchema(
const nsACString& schema, nsIGSettingsCollection** collection) {
NS_ENSURE_ARG_POINTER(collection);
const char* const* schemas = g_settings_list_schemas();
for (uint32_t i = 0; schemas[i] != nullptr; i++) {
if (schema.Equals(schemas[i])) {
GSettings* settings = g_settings_new(PromiseFlatCString(schema).get());
nsGSettingsCollection* mozGSettings = new nsGSettingsCollection(settings);
NS_ADDREF(*collection = mozGSettings);
return NS_OK;
}
}
return NS_ERROR_FAILURE;
}