The Tor Browser: toolkit/system/gnome/nsGSettingsService.cpp@b8a032363ba2 (annotated)

toolkit/system/gnome/nsGSettingsService.cpp@b8a032363ba2 (annotated)

toolkit/system/gnome/nsGSettingsService.cpp

Thu, 22 Jan 2015 13:21:57 +0100

author: Michael Schloh von Bennewitz <michael@schloh.com>
date: Thu, 22 Jan 2015 13:21:57 +0100
branch: TOR_BUG_9701
changeset 15: b8a032363ba2
permissions: -rw-r--r--

Incorporate requested changes from Mozilla in review:
https://bugzilla.mozilla.org/show_bug.cgi?id=1123480#c6

 /* -*- 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
  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
 #include "mozilla/ArrayUtils.h"
 #include "nsGSettingsService.h"
 #include "nsStringAPI.h"
 #include "nsCOMPtr.h"
 #include "nsMemory.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 MOZ_FINAL : public nsIGSettingsCollection
 {
 public:
   NS_DECL_ISUPPORTS
   NS_DECL_NSIGSETTINGSCOLLECTION
   nsGSettingsCollection(GSettings* aSettings) : mSettings(aSettings),
                                                 mKeys(nullptr) {}
   ~nsGSettingsCollection();
 private:
   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
     NS_ADDREF(*aResult = items);
     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, false);
     }
     p_gs_strings++;
   }
   g_free(gs_strings);
   NS_ADDREF(*aResult = items);
   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 (uint32_t i = 0; i < ArrayLength(kGSettingsSymbols); i++) {
     *kGSettingsSymbols[i].function =
       PR_FindFunctionSymbol(gioLib, kGSettingsSymbols[i].functionName);
     if (!*kGSettingsSymbols[i].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;
 }

The Tor Browser / annotate

toolkit/system/gnome/nsGSettingsService.cpp@b8a032363ba2 (annotated)

toolkit/system/gnome/nsGSettingsService.cpp