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/*
* Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice, this
* list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#pragma once
#include <AK/String.h>
#include <AK/Function.h>
#include <AK/Types.h>
#include <AK/WeakPtr.h>
class CObject;
class CEvent {
public:
enum Type {
Invalid = 0,
Quit,
Timer,
NotifierRead,
NotifierWrite,
DeferredInvoke,
ChildAdded,
ChildRemoved,
Custom,
};
CEvent() {}
explicit CEvent(unsigned type)
: m_type(type)
{
}
virtual ~CEvent() {}
unsigned type() const { return m_type; }
bool is_accepted() const { return m_accepted; }
void accept() { m_accepted = true; }
void ignore() { m_accepted = false; }
private:
unsigned m_type { Type::Invalid };
bool m_accepted { true };
};
class CDeferredInvocationEvent : public CEvent {
friend class CEventLoop;
public:
CDeferredInvocationEvent(Function<void(CObject&)> invokee)
: CEvent(CEvent::Type::DeferredInvoke)
, m_invokee(move(invokee))
{
}
private:
Function<void(CObject&)> m_invokee;
};
class CTimerEvent final : public CEvent {
public:
explicit CTimerEvent(int timer_id)
: CEvent(CEvent::Timer)
, m_timer_id(timer_id)
{
}
~CTimerEvent() {}
int timer_id() const { return m_timer_id; }
private:
int m_timer_id;
};
class CNotifierReadEvent final : public CEvent {
public:
explicit CNotifierReadEvent(int fd)
: CEvent(CEvent::NotifierRead)
, m_fd(fd)
{
}
~CNotifierReadEvent() {}
int fd() const { return m_fd; }
private:
int m_fd;
};
class CNotifierWriteEvent final : public CEvent {
public:
explicit CNotifierWriteEvent(int fd)
: CEvent(CEvent::NotifierWrite)
, m_fd(fd)
{
}
~CNotifierWriteEvent() {}
int fd() const { return m_fd; }
private:
int m_fd;
};
class CChildEvent final : public CEvent {
public:
CChildEvent(Type, CObject& child, CObject* insertion_before_child = nullptr);
~CChildEvent();
CObject* child() { return m_child.ptr(); }
const CObject* child() const { return m_child.ptr(); }
CObject* insertion_before_child() { return m_insertion_before_child.ptr(); }
const CObject* insertion_before_child() const { return m_insertion_before_child.ptr(); }
private:
WeakPtr<CObject> m_child;
WeakPtr<CObject> m_insertion_before_child;
};
class CCustomEvent : public CEvent {
public:
CCustomEvent(int custom_type, void* data = nullptr)
: CEvent(CEvent::Type::Custom)
, m_custom_type(custom_type)
, m_data(data)
{
}
~CCustomEvent() {}
int custom_type() const { return m_custom_type; }
void* data() { return m_data; }
const void* data() const { return m_data; }
private:
int m_custom_type { 0 };
void* m_data { nullptr };
};
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