1 files changed, 88 insertions, 0 deletions
diff --git a/xbmc/settings/lib/ISettingCallback.h b/xbmc/settings/lib/ISettingCallback.h
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+++ b/xbmc/settings/lib/ISettingCallback.h
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+/*
+ *  Copyright (C) 2013-2018 Team Kodi
+ *  This file is part of Kodi - https://kodi.tv
+ *
+ *  SPDX-License-Identifier: GPL-2.0-or-later
+ *  See LICENSES/README.md for more information.
+ */
+
+#pragma once
+
+#include <memory>
+
+class CSetting;
+class TiXmlNode;
+
+class ISettingCallback
+{
+public:
+  virtual ~ISettingCallback() = default;
+
+  /*!
+   \brief The value of the given setting is being changed.
+
+   This callback is triggered whenever the value of a setting is being
+   changed. The given CSetting already contains the new value and the handler
+   of the callback has the possibility to allow or revert changing the value
+   of the setting. In case of a revert OnSettingChanging() is called again to
+   inform all listeners that the value change has been reverted.
+
+   \param setting The setting whose value is being changed (already containing the changed value)
+   \return True if the new value is acceptable otherwise false
+   */
+  virtual bool OnSettingChanging(const std::shared_ptr<const CSetting>& setting) { return true; }
+
+  /*!
+   \brief The value of the given setting has changed.
+
+   This callback is triggered whenever the value of a setting has been
+   successfully changed (i.e. none of the OnSettingChanging() handlers)
+   has reverted the change.
+
+   \param setting The setting whose value has been changed
+   */
+  virtual void OnSettingChanged(const std::shared_ptr<const CSetting>& setting) {}
+
+  /*!
+   \brief The given setting has been activated.
+
+   This callback is triggered whenever the given setting has been activated.
+   This callback is only fired for CSettingAction settings.
+
+   \param setting The setting which has been activated.
+   */
+  virtual void OnSettingAction(const std::shared_ptr<const CSetting>& setting) {}
+
+  /*!
+   \brief The given setting needs to be updated.
+
+   This callback is triggered when a setting needs to be updated because its
+   value is outdated. This only happens when initially loading the value of a
+   setting and will not be triggered afterwards.
+
+   \param setting The setting which needs to be updated.
+   \param oldSettingId The id of the previous setting.
+   \param oldSettingNode The old setting node
+   \return True if the setting has been successfully updated otherwise false
+   */
+  virtual bool OnSettingUpdate(const std::shared_ptr<CSetting>& setting,
+                               const char* oldSettingId,
+                               const TiXmlNode* oldSettingNode)
+  {
+    return false;
+  }
+
+  /*!
+   \brief The given property of the given setting has changed
+
+   This callback is triggered when a property (e.g. enabled or the list of
+   dynamic options) has changed.
+
+   \param setting The setting which has a changed property
+   \param propertyName The string representation of the changed property
+   */
+  virtual void OnSettingPropertyChanged(const std::shared_ptr<const CSetting>& setting,
+                                        const char* propertyName)
+  {
+  }
+};