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