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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/Function.h>
#include <AK/String.h>
#include <AK/Types.h>
#include <AK/WeakPtr.h>
#include <LibCore/Forward.h>
namespace Core {
class Event {
public:
enum Type {
Invalid = 0,
Quit,
Timer,
NotifierRead,
NotifierWrite,
DeferredInvoke,
ChildAdded,
ChildRemoved,
Custom,
};
Event() {}
explicit Event(unsigned type)
: m_type(type)
{
}
virtual ~Event() {}
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 DeferredInvocationEvent : public Event {
friend class EventLoop;
public:
DeferredInvocationEvent(Function<void(Object&)> invokee)
: Event(Event::Type::DeferredInvoke)
, m_invokee(move(invokee))
{
}
private:
Function<void(Object&)> m_invokee;
};
class TimerEvent final : public Event {
public:
explicit TimerEvent(int timer_id)
: Event(Event::Timer)
, m_timer_id(timer_id)
{
}
~TimerEvent() {}
int timer_id() const { return m_timer_id; }
private:
int m_timer_id;
};
class NotifierReadEvent final : public Event {
public:
explicit NotifierReadEvent(int fd)
: Event(Event::NotifierRead)
, m_fd(fd)
{
}
~NotifierReadEvent() {}
int fd() const { return m_fd; }
private:
int m_fd;
};
class NotifierWriteEvent final : public Event {
public:
explicit NotifierWriteEvent(int fd)
: Event(Event::NotifierWrite)
, m_fd(fd)
{
}
~NotifierWriteEvent() {}
int fd() const { return m_fd; }
private:
int m_fd;
};
class ChildEvent final : public Event {
public:
ChildEvent(Type, Object& child, Object* insertion_before_child = nullptr);
~ChildEvent();
Object* child() { return m_child.ptr(); }
const Object* child() const { return m_child.ptr(); }
Object* insertion_before_child() { return m_insertion_before_child.ptr(); }
const Object* insertion_before_child() const { return m_insertion_before_child.ptr(); }
private:
WeakPtr<Object> m_child;
WeakPtr<Object> m_insertion_before_child;
};
class CustomEvent : public Event {
public:
CustomEvent(int custom_type, void* data = nullptr)
: Event(Event::Type::Custom)
, m_custom_type(custom_type)
, m_data(data)
{
}
~CustomEvent() {}
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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