84 lines
1.6 KiB
C++
84 lines
1.6 KiB
C++
/*
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* Copyright 2010, Oliver Ruiz Dorantes. All rights reserved.
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* Distributed under the terms of the MIT License.
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*/
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#ifndef _PREFERENCES_CONTAINER_H
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#define _PREFERENCES_CONTAINER_H
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#include <libsupport/Singleton.h>
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#include <Directory.h>
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#include <File.h>
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#include <FindDirectory.h>
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#include <Path.h>
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// TODO: added to main singleton class?
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template<typename T> T* Singleton<T>::fInstance = 0;
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template<class SettingsType>
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class PreferencesContainer : public Singleton<PreferencesContainer<SettingsType> > {
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public:
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static SettingsType*
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Item()
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{
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return &(Singleton<PreferencesContainer<SettingsType> >::Get()->fSettings);
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}
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status_t Load()
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{
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if (fPreferencesFile.SetTo(&fDirectory, fFilename,
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B_READ_WRITE | B_FAIL_IF_EXISTS) == B_OK) {
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// reset the file pointer
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fPreferencesFile.Seek(0, SEEK_SET);
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if (fPreferencesFile.Read(&fSettings, sizeof(SettingsType)) > 0)
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return B_OK;
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}
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return B_ERROR;
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}
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status_t Save()
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{
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if (fPreferencesFile.SetTo(&fDirectory, fFilename,
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B_READ_WRITE | B_CREATE_FILE | B_ERASE_FILE) == B_OK) {
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if (fPreferencesFile.Write(&fSettings, sizeof(SettingsType)) > 0)
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return B_OK;
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}
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return B_ERROR;
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}
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private:
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PreferencesContainer<SettingsType>()
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: Singleton<PreferencesContainer<SettingsType> >()
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{
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BPath path;
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find_directory(B_USER_SETTINGS_DIRECTORY, &path);
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path.Append(fFolder);
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fDirectory.SetTo(path.Path());
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Load();
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}
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friend class Singleton<PreferencesContainer<SettingsType> >;
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SettingsType fSettings;
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BFile fPreferencesFile;
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BDirectory fDirectory;
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static const char* fFilename;
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static const char* fFolder;
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};
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#endif // _PREFERENCES_CONTAINER_H
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