X-Git-Url: https://git.quassel-irc.org/?p=quassel.git;a=blobdiff_plain;f=src%2Fcommon%2Fsettings.h;h=ed815dc472ff4649d5fb14137ea93842f6de3717;hp=ebd36c22c45aefc74f90ef3a786410e4a85b318b;hb=cc6e7c08709c4e761e2fd9c2e322751015497003;hpb=e50ae7a06fc4e5d3a911c361d30953410deab609 diff --git a/src/common/settings.h b/src/common/settings.h index ebd36c22..ed815dc4 100644 --- a/src/common/settings.h +++ b/src/common/settings.h @@ -1,5 +1,5 @@ /*************************************************************************** - * Copyright (C) 2005-2015 by the Quassel Project * + * Copyright (C) 2005-2019 by the Quassel Project * * devel@quassel-irc.org * * * * This program is free software; you can redistribute it and/or modify * @@ -18,8 +18,13 @@ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. * ***************************************************************************/ -#ifndef SETTINGS_H -#define SETTINGS_H +#pragma once + +#include "common-export.h" + +#include +#include +#include #include #include @@ -29,110 +34,169 @@ #include "quassel.h" -class SettingsChangeNotifier : public QObject +class COMMON_EXPORT SettingsChangeNotifier : public QObject { Q_OBJECT signals: - void valueChanged(const QVariant &newValue); + void valueChanged(const QVariant& newValue); private: friend class Settings; }; - -class Settings +class COMMON_EXPORT Settings { public: - enum Mode { Default, Custom }; + enum Mode + { + Default, + Custom + }; public: - //! Call the given slot on change of the given key - virtual void notify(const QString &key, QObject *receiver, const char *slot); + //! Calls the given slot on change of the given key + template + void notify(const QString& key, const Receiver* receiver, Slot slot) const + { + static_assert(!std::is_same::value, "Old-style slots not supported"); + QObject::connect(notifier(normalizedKey(_group, keyForNotify(key))), &SettingsChangeNotifier::valueChanged, receiver, slot); + } //! Sets up notification and calls the given slot to set the initial value - void initAndNotify(const QString &key, QObject *receiver, const char *slot, const QVariant &defaultValue = QVariant()); + template + void initAndNotify(const QString& key, const Receiver* receiver, Slot slot, const QVariant& defaultValue = {}) const + { + notify(key, receiver, std::move(slot)); + auto notifyKey = keyForNotify(key); + emit notifier(normalizedKey(_group, notifyKey))->valueChanged(localValue(notifyKey, defaultValue)); + } - virtual uint version(); + /** + * Get the major configuration version + * + * This indicates the backwards/forwards incompatible version of configuration. + * + * @return Major configuration version (the X in XX.YY) + */ + virtual uint version() const; + + /** + * Get the minor configuration version + * + * This indicates the backwards/forwards compatible version of configuration. + * + * @see Settings::setVersionMinor() + * @return Minor configuration version (the Y in XX.YY) + */ + virtual uint versionMinor() const; + + /** + * Set the minor configuration version + * + * When making backwards/forwards compatible changes, call this with the new version number. + * This does not implement any upgrade logic; implement that when checking Settings::version(), + * e.g. in Core::Core() and QtUiApplication::init(). + * + * @param[in] versionMinor New minor version number + */ + virtual void setVersionMinor(const uint versionMinor); + + /** + * Persist unsaved changes to permanent storage + * + * @return true if succeeded, false otherwise + */ + bool sync(); + + /** + * Check if the configuration storage is writable. + * + * @return true if writable, false otherwise + */ + bool isWritable() const; protected: - inline Settings(QString group_, QString appName_) : group(group_), appName(appName_) {} - inline virtual ~Settings() {} + Settings(QString group, QString appName); + virtual ~Settings() = default; - inline void setGroup(const QString &group_) { group = group_; } + void setGroup(QString group); - virtual QStringList allLocalKeys(); - virtual QStringList localChildKeys(const QString &rootkey = QString()); - virtual QStringList localChildGroups(const QString &rootkey = QString()); + /** + * Allows subclasses to transform the key given to notify(). + * + * Default implementation just returns the given key. + * + * @param key Key given to notify() + * @returns Key that should be used for notfication + */ + virtual QString keyForNotify(const QString& key) const; - virtual void setLocalValue(const QString &key, const QVariant &data); - virtual const QVariant &localValue(const QString &key, const QVariant &def = QVariant()); + virtual QStringList allLocalKeys() const; + virtual QStringList localChildKeys(const QString& rootkey = QString()) const; + virtual QStringList localChildGroups(const QString& rootkey = QString()) const; - virtual void removeLocalKey(const QString &key); + virtual void setLocalValue(const QString& key, const QVariant& data); + virtual QVariant localValue(const QString& key, const QVariant& def = QVariant()) const; - QString group; - QString appName; + /** + * Gets if a key exists in settings + * + * @param[in] key ID of local settings key + * @returns True if key exists in settings, otherwise false + */ + virtual bool localKeyExists(const QString& key) const; -private: - inline QSettings::Format format() - { -#ifdef Q_OS_WIN - return QSettings::IniFormat; -#else - return QSettings::NativeFormat; -#endif - } + virtual void removeLocalKey(const QString& key); + QString _group; + QString _appName; - inline QString fileName() - { - return Quassel::configDirPath() + appName - + ((format() == QSettings::NativeFormat) ? QLatin1String(".conf") : QLatin1String(".ini")); - } +private: + QSettings::Format format() const; + QString fileName() const; - static QHash settingsCache; - static QHash settingsChangeNotifier; + QString normalizedKey(const QString& group, const QString& key) const; - inline QString normalizedKey(const QString &group, const QString &key) - { - if (group.isEmpty()) - return key; - return group + '/' + key; - } + /** + * Update the cache of whether or not a given settings key persists on disk + * + * @param normKey Normalized settings key ID + * @param exists True if key exists, otherwise false + */ + void setCacheKeyPersisted(const QString& normKey, bool exists) const; + /** + * Check if the given settings key ID persists on disk (rather than being a default value) + * + * @see Settings::localKeyExists() + * + * @param normKey Normalized settings key ID + * @return True if key exists and persistence has been cached, otherwise false + */ + bool cacheKeyPersisted(const QString& normKey) const; - inline void setCacheValue(const QString &normKey, const QVariant &data) - { - settingsCache[normKey] = data; - } + /** + * Check if the persistence of the given settings key ID has been cached + * + * @param normKey Normalized settings key ID + * @return True if key persistence has been cached, otherwise false + */ + bool isKeyPersistedCached(const QString& normKey) const; + void setCacheValue(const QString& normKey, const QVariant& data) const; - inline const QVariant &cacheValue(const QString &normKey) - { - return settingsCache[normKey]; - } + QVariant cacheValue(const QString& normKey) const; + bool isCached(const QString& normKey) const; - inline bool isCached(const QString &normKey) - { - return settingsCache.contains(normKey); - } + SettingsChangeNotifier* notifier(const QString& normKey) const; + bool hasNotifier(const QString& normKey) const; - inline SettingsChangeNotifier *notifier(const QString &normKey) - { - if (!hasNotifier(normKey)) - settingsChangeNotifier[normKey] = new SettingsChangeNotifier(); - return settingsChangeNotifier[normKey]; - } - - - inline bool hasNotifier(const QString &normKey) - { - return settingsChangeNotifier.contains(normKey); - } +private: + static QHash _settingsCache; ///< Cached settings values + static QHash _settingsKeyPersistedCache; ///< Cached settings key exists on disk + static QHash> _settingsChangeNotifier; }; - - -#endif