mirror of https://github.com/aseprite/aseprite.git
63 lines
1.2 KiB
C
63 lines
1.2 KiB
C
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// Aseprite
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// Copyright (C) 2025 Igara Studio S.A.
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//
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// This program is distributed under the terms of
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// the End-User License Agreement for Aseprite.
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#ifndef APP_CMD_WITH_SUSPEND_H_INCLUDED
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#define APP_CMD_WITH_SUSPEND_H_INCLUDED
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#pragma once
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#include "doc/object.h"
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#include <type_traits>
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namespace app { namespace cmd {
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// Auxiliary class to keep a doc::Object in memory but without IDs,
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// and to restore all its IDs when it's required.
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template<typename T>
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class WithSuspended {
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public:
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~WithSuspended()
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{
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// If the object is suspended it's not included in the Sprite
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// hierarchy, so it will not be automatically deleted, thereby we
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// have to delete the object to avoid a memory leak.
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if constexpr (std::is_pointer_v<T>)
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delete m_object;
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}
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T object() { return m_object; }
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size_t size() const { return m_size; }
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void suspend(T object)
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{
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ASSERT(!m_object);
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m_object = object;
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m_size = m_object->getMemSize();
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m_object->suspendObject();
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}
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T restore()
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{
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ASSERT(m_object);
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T object = m_object;
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m_object->restoreObject();
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m_object = nullptr;
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m_size = 0;
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return object;
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}
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private:
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size_t m_size = 0;
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T m_object = nullptr;
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};
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}} // namespace app::cmd
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#endif
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