1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/toolkit/system/gnome/nsGSettingsService.cpp Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,350 @@
1.4 +/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
1.5 +/* This Source Code Form is subject to the terms of the Mozilla Public
1.6 + * License, v. 2.0. If a copy of the MPL was not distributed with this
1.7 + * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
1.8 +
1.9 +#include "mozilla/ArrayUtils.h"
1.10 +
1.11 +#include "nsGSettingsService.h"
1.12 +#include "nsStringAPI.h"
1.13 +#include "nsCOMPtr.h"
1.14 +#include "nsMemory.h"
1.15 +#include "prlink.h"
1.16 +#include "nsComponentManagerUtils.h"
1.17 +#include "nsIMutableArray.h"
1.18 +#include "nsISupportsPrimitives.h"
1.19 +
1.20 +#include <glib.h>
1.21 +#include <glib-object.h>
1.22 +
1.23 +using namespace mozilla;
1.24 +
1.25 +typedef struct _GSettings GSettings;
1.26 +typedef struct _GVariantType GVariantType;
1.27 +typedef struct _GVariant GVariant;
1.28 +
1.29 +#ifndef G_VARIANT_TYPE_INT32
1.30 +# define G_VARIANT_TYPE_INT32 ((const GVariantType *) "i")
1.31 +# define G_VARIANT_TYPE_BOOLEAN ((const GVariantType *) "b")
1.32 +# define G_VARIANT_TYPE_STRING ((const GVariantType *) "s")
1.33 +# define G_VARIANT_TYPE_OBJECT_PATH ((const GVariantType *) "o")
1.34 +# define G_VARIANT_TYPE_SIGNATURE ((const GVariantType *) "g")
1.35 +#endif
1.36 +#ifndef G_VARIANT_TYPE_STRING_ARRAY
1.37 +# define G_VARIANT_TYPE_STRING_ARRAY ((const GVariantType *) "as")
1.38 +#endif
1.39 +
1.40 +#define GSETTINGS_FUNCTIONS \
1.41 + FUNC(g_settings_new, GSettings *, (const char* schema)) \
1.42 + FUNC(g_settings_list_schemas, const char * const *, (void)) \
1.43 + FUNC(g_settings_list_keys, char **, (GSettings* settings)) \
1.44 + FUNC(g_settings_get_value, GVariant *, (GSettings* settings, const char* key)) \
1.45 + FUNC(g_settings_set_value, gboolean, (GSettings* settings, const char* key, GVariant* value)) \
1.46 + FUNC(g_settings_range_check, gboolean, (GSettings* settings, const char* key, GVariant* value)) \
1.47 + FUNC(g_variant_get_int32, gint32, (GVariant* variant)) \
1.48 + FUNC(g_variant_get_boolean, gboolean, (GVariant* variant)) \
1.49 + FUNC(g_variant_get_string, const char *, (GVariant* value, gsize* length)) \
1.50 + FUNC(g_variant_get_strv, const char **, (GVariant* value, gsize* length)) \
1.51 + FUNC(g_variant_is_of_type, gboolean, (GVariant* value, const GVariantType* type)) \
1.52 + FUNC(g_variant_new_int32, GVariant *, (gint32 value)) \
1.53 + FUNC(g_variant_new_boolean, GVariant *, (gboolean value)) \
1.54 + FUNC(g_variant_new_string, GVariant *, (const char* string)) \
1.55 + FUNC(g_variant_unref, void, (GVariant* value))
1.56 +
1.57 +#define FUNC(name, type, params) \
1.58 + typedef type (*_##name##_fn) params; \
1.59 + static _##name##_fn _##name;
1.60 +
1.61 +GSETTINGS_FUNCTIONS
1.62 +
1.63 +#undef FUNC
1.64 +
1.65 +#define g_settings_new _g_settings_new
1.66 +#define g_settings_list_schemas _g_settings_list_schemas
1.67 +#define g_settings_list_keys _g_settings_list_keys
1.68 +#define g_settings_get_value _g_settings_get_value
1.69 +#define g_settings_set_value _g_settings_set_value
1.70 +#define g_settings_range_check _g_settings_range_check
1.71 +#define g_variant_get_int32 _g_variant_get_int32
1.72 +#define g_variant_get_boolean _g_variant_get_boolean
1.73 +#define g_variant_get_string _g_variant_get_string
1.74 +#define g_variant_get_strv _g_variant_get_strv
1.75 +#define g_variant_is_of_type _g_variant_is_of_type
1.76 +#define g_variant_new_int32 _g_variant_new_int32
1.77 +#define g_variant_new_boolean _g_variant_new_boolean
1.78 +#define g_variant_new_string _g_variant_new_string
1.79 +#define g_variant_unref _g_variant_unref
1.80 +
1.81 +static PRLibrary *gioLib = nullptr;
1.82 +
1.83 +class nsGSettingsCollection MOZ_FINAL : public nsIGSettingsCollection
1.84 +{
1.85 +public:
1.86 + NS_DECL_ISUPPORTS
1.87 + NS_DECL_NSIGSETTINGSCOLLECTION
1.88 +
1.89 + nsGSettingsCollection(GSettings* aSettings) : mSettings(aSettings),
1.90 + mKeys(nullptr) {}
1.91 + ~nsGSettingsCollection();
1.92 +
1.93 +private:
1.94 + bool KeyExists(const nsACString& aKey);
1.95 + bool SetValue(const nsACString& aKey,
1.96 + GVariant *aValue);
1.97 +
1.98 + GSettings *mSettings;
1.99 + char **mKeys;
1.100 +};
1.101 +
1.102 +nsGSettingsCollection::~nsGSettingsCollection()
1.103 +{
1.104 + g_strfreev(mKeys);
1.105 + g_object_unref(mSettings);
1.106 +}
1.107 +
1.108 +bool
1.109 +nsGSettingsCollection::KeyExists(const nsACString& aKey)
1.110 +{
1.111 + if (!mKeys)
1.112 + mKeys = g_settings_list_keys(mSettings);
1.113 +
1.114 + for (uint32_t i = 0; mKeys[i] != nullptr; i++) {
1.115 + if (aKey.Equals(mKeys[i]))
1.116 + return true;
1.117 + }
1.118 +
1.119 + return false;
1.120 +}
1.121 +
1.122 +bool
1.123 +nsGSettingsCollection::SetValue(const nsACString& aKey,
1.124 + GVariant *aValue)
1.125 +{
1.126 + if (!KeyExists(aKey) ||
1.127 + !g_settings_range_check(mSettings,
1.128 + PromiseFlatCString(aKey).get(),
1.129 + aValue)) {
1.130 + g_variant_unref(aValue);
1.131 + return false;
1.132 + }
1.133 +
1.134 + return g_settings_set_value(mSettings,
1.135 + PromiseFlatCString(aKey).get(),
1.136 + aValue);
1.137 +}
1.138 +
1.139 +NS_IMPL_ISUPPORTS(nsGSettingsCollection, nsIGSettingsCollection)
1.140 +
1.141 +NS_IMETHODIMP
1.142 +nsGSettingsCollection::SetString(const nsACString& aKey,
1.143 + const nsACString& aValue)
1.144 +{
1.145 + GVariant *value = g_variant_new_string(PromiseFlatCString(aValue).get());
1.146 + if (!value)
1.147 + return NS_ERROR_OUT_OF_MEMORY;
1.148 +
1.149 + bool res = SetValue(aKey, value);
1.150 +
1.151 + return res ? NS_OK : NS_ERROR_FAILURE;
1.152 +}
1.153 +
1.154 +NS_IMETHODIMP
1.155 +nsGSettingsCollection::SetBoolean(const nsACString& aKey,
1.156 + bool aValue)
1.157 +{
1.158 + GVariant *value = g_variant_new_boolean(aValue);
1.159 + if (!value)
1.160 + return NS_ERROR_OUT_OF_MEMORY;
1.161 +
1.162 + bool res = SetValue(aKey, value);
1.163 +
1.164 + return res ? NS_OK : NS_ERROR_FAILURE;
1.165 +}
1.166 +
1.167 +NS_IMETHODIMP
1.168 +nsGSettingsCollection::SetInt(const nsACString& aKey,
1.169 + int32_t aValue)
1.170 +{
1.171 + GVariant *value = g_variant_new_int32(aValue);
1.172 + if (!value)
1.173 + return NS_ERROR_OUT_OF_MEMORY;
1.174 +
1.175 + bool res = SetValue(aKey, value);
1.176 +
1.177 + return res ? NS_OK : NS_ERROR_FAILURE;
1.178 +}
1.179 +
1.180 +NS_IMETHODIMP
1.181 +nsGSettingsCollection::GetString(const nsACString& aKey,
1.182 + nsACString& aResult)
1.183 +{
1.184 + if (!KeyExists(aKey))
1.185 + return NS_ERROR_INVALID_ARG;
1.186 +
1.187 + GVariant *value = g_settings_get_value(mSettings,
1.188 + PromiseFlatCString(aKey).get());
1.189 + if (!g_variant_is_of_type(value, G_VARIANT_TYPE_STRING) &&
1.190 + !g_variant_is_of_type(value, G_VARIANT_TYPE_OBJECT_PATH) &&
1.191 + !g_variant_is_of_type(value, G_VARIANT_TYPE_SIGNATURE)) {
1.192 + g_variant_unref(value);
1.193 + return NS_ERROR_FAILURE;
1.194 + }
1.195 +
1.196 + aResult.Assign(g_variant_get_string(value, nullptr));
1.197 + g_variant_unref(value);
1.198 +
1.199 + return NS_OK;
1.200 +}
1.201 +
1.202 +NS_IMETHODIMP
1.203 +nsGSettingsCollection::GetBoolean(const nsACString& aKey,
1.204 + bool* aResult)
1.205 +{
1.206 + NS_ENSURE_ARG_POINTER(aResult);
1.207 +
1.208 + if (!KeyExists(aKey))
1.209 + return NS_ERROR_INVALID_ARG;
1.210 +
1.211 + GVariant *value = g_settings_get_value(mSettings,
1.212 + PromiseFlatCString(aKey).get());
1.213 + if (!g_variant_is_of_type(value, G_VARIANT_TYPE_BOOLEAN)) {
1.214 + g_variant_unref(value);
1.215 + return NS_ERROR_FAILURE;
1.216 + }
1.217 +
1.218 + gboolean res = g_variant_get_boolean(value);
1.219 + *aResult = res ? true : false;
1.220 + g_variant_unref(value);
1.221 +
1.222 + return NS_OK;
1.223 +}
1.224 +
1.225 +NS_IMETHODIMP
1.226 +nsGSettingsCollection::GetInt(const nsACString& aKey,
1.227 + int32_t* aResult)
1.228 +{
1.229 + NS_ENSURE_ARG_POINTER(aResult);
1.230 +
1.231 + if (!KeyExists(aKey))
1.232 + return NS_ERROR_INVALID_ARG;
1.233 +
1.234 + GVariant *value = g_settings_get_value(mSettings,
1.235 + PromiseFlatCString(aKey).get());
1.236 + if (!g_variant_is_of_type(value, G_VARIANT_TYPE_INT32)) {
1.237 + g_variant_unref(value);
1.238 + return NS_ERROR_FAILURE;
1.239 + }
1.240 +
1.241 + *aResult = g_variant_get_int32(value);
1.242 + g_variant_unref(value);
1.243 +
1.244 + return NS_OK;
1.245 +}
1.246 +
1.247 +// These types are local to nsGSettingsService::Init, but ISO C++98 doesn't
1.248 +// allow a template (ArrayLength) to be instantiated based on a local type.
1.249 +// Boo-urns!
1.250 +typedef void (*nsGSettingsFunc)();
1.251 +struct nsGSettingsDynamicFunction {
1.252 + const char *functionName;
1.253 + nsGSettingsFunc *function;
1.254 +};
1.255 +
1.256 +NS_IMETHODIMP
1.257 +nsGSettingsCollection::GetStringList(const nsACString& aKey, nsIArray** aResult)
1.258 +{
1.259 + if (!KeyExists(aKey))
1.260 + return NS_ERROR_INVALID_ARG;
1.261 +
1.262 + nsCOMPtr<nsIMutableArray> items(do_CreateInstance(NS_ARRAY_CONTRACTID));
1.263 + if (!items) {
1.264 + return NS_ERROR_OUT_OF_MEMORY;
1.265 + }
1.266 +
1.267 + GVariant *value = g_settings_get_value(mSettings,
1.268 + PromiseFlatCString(aKey).get());
1.269 +
1.270 + if (!g_variant_is_of_type(value, G_VARIANT_TYPE_STRING_ARRAY)) {
1.271 + g_variant_unref(value);
1.272 + return NS_ERROR_FAILURE;
1.273 + }
1.274 +
1.275 + const gchar ** gs_strings = g_variant_get_strv(value, nullptr);
1.276 + if (!gs_strings) {
1.277 + // empty array
1.278 + NS_ADDREF(*aResult = items);
1.279 + g_variant_unref(value);
1.280 + return NS_OK;
1.281 + }
1.282 +
1.283 + const gchar** p_gs_strings = gs_strings;
1.284 + while (*p_gs_strings != nullptr)
1.285 + {
1.286 + nsCOMPtr<nsISupportsCString> obj(do_CreateInstance(NS_SUPPORTS_CSTRING_CONTRACTID));
1.287 + if (obj) {
1.288 + obj->SetData(nsDependentCString(*p_gs_strings));
1.289 + items->AppendElement(obj, false);
1.290 + }
1.291 + p_gs_strings++;
1.292 + }
1.293 + g_free(gs_strings);
1.294 + NS_ADDREF(*aResult = items);
1.295 + g_variant_unref(value);
1.296 + return NS_OK;
1.297 +}
1.298 +
1.299 +nsresult
1.300 +nsGSettingsService::Init()
1.301 +{
1.302 +#define FUNC(name, type, params) { #name, (nsGSettingsFunc *)&_##name },
1.303 + static const nsGSettingsDynamicFunction kGSettingsSymbols[] = {
1.304 + GSETTINGS_FUNCTIONS
1.305 + };
1.306 +#undef FUNC
1.307 +
1.308 + if (!gioLib) {
1.309 + gioLib = PR_LoadLibrary("libgio-2.0.so.0");
1.310 + if (!gioLib)
1.311 + return NS_ERROR_FAILURE;
1.312 + }
1.313 +
1.314 + for (uint32_t i = 0; i < ArrayLength(kGSettingsSymbols); i++) {
1.315 + *kGSettingsSymbols[i].function =
1.316 + PR_FindFunctionSymbol(gioLib, kGSettingsSymbols[i].functionName);
1.317 + if (!*kGSettingsSymbols[i].function) {
1.318 + return NS_ERROR_FAILURE;
1.319 + }
1.320 + }
1.321 +
1.322 + return NS_OK;
1.323 +}
1.324 +
1.325 +NS_IMPL_ISUPPORTS(nsGSettingsService, nsIGSettingsService)
1.326 +
1.327 +nsGSettingsService::~nsGSettingsService()
1.328 +{
1.329 + if (gioLib) {
1.330 + PR_UnloadLibrary(gioLib);
1.331 + gioLib = nullptr;
1.332 + }
1.333 +}
1.334 +
1.335 +NS_IMETHODIMP
1.336 +nsGSettingsService::GetCollectionForSchema(const nsACString& schema,
1.337 + nsIGSettingsCollection** collection)
1.338 +{
1.339 + NS_ENSURE_ARG_POINTER(collection);
1.340 +
1.341 + const char * const *schemas = g_settings_list_schemas();
1.342 +
1.343 + for (uint32_t i = 0; schemas[i] != nullptr; i++) {
1.344 + if (schema.Equals(schemas[i])) {
1.345 + GSettings *settings = g_settings_new(PromiseFlatCString(schema).get());
1.346 + nsGSettingsCollection *mozGSettings = new nsGSettingsCollection(settings);
1.347 + NS_ADDREF(*collection = mozGSettings);
1.348 + return NS_OK;
1.349 + }
1.350 + }
1.351 +
1.352 + return NS_ERROR_FAILURE;
1.353 +}
