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// Aseprite Base Library
// Copyright (c) 2001-2013 David Capello
//
// This file is released under the terms of the MIT license.
// Read LICENSE.txt for more information.
#ifndef BASE_SIGNAL_H_INCLUDED
#define BASE_SIGNAL_H_INCLUDED
#pragma once
//#include "base/slot.h"
//#include "base/remove_from_container.h"
#include "./slot.h"
#include "./remove_from_container.h"
#include <vector>
// Signal0_base<R> - Base class to delegate responsibility to
// functions of zero arguments.
template<typename R>
class Signal0_base
{
public:
typedef R ReturnType;
typedef Slot0<R> SlotType;
typedef std::vector<SlotType*> SlotList;
protected:
SlotList m_slots;
public:
Signal0_base() { }
Signal0_base(const Signal0_base<R>& s)
{
copy(s);
}
~Signal0_base()
{
disconnectAll();
}
SlotType* addSlot(SlotType* slot)
{
m_slots.push_back(slot);
return slot;
}
template<typename F>
SlotType* connect(const F& f)
{
return addSlot(new Slot0_fun<R, F>(f));
}
template<class T>
SlotType* connect(R (T::*m)(), T* t)
{
return addSlot(new Slot0_mem<R, T>(m, t));
}
const SlotList& getSlots() const
{
return m_slots;
}
void disconnect(SlotType* slot)
{
base::remove_from_container(m_slots, slot);
}
void disconnectAll()
{
typename SlotList::iterator end = m_slots.end();
for (typename SlotList::iterator
it = m_slots.begin(); it != end; ++it)
delete *it;
m_slots.clear();
}
bool empty() const
{
return m_slots.empty();
}
Signal0_base& operator=(const Signal0_base<R>& s) {
copy(s);
return *this;
}
private:
void copy(const Signal0_base<R>& s)
{
typename SlotList::const_iterator end = s.m_slots.end();
for (typename SlotList::const_iterator
it = s.m_slots.begin(); it != end; ++it) {
m_slots.push_back((*it)->clone());
}
}
};
// Signal0<R>
template<typename R>
class Signal0 : public Signal0_base<R>
{
public:
Signal0() { }
Signal0(const Signal0<R>& s)
: Signal0_base<R>(s) { }
R operator()(R default_result = R())
{
R result(default_result);
typename Signal0_base<R>::SlotList::iterator end = Signal0_base<R>::m_slots.end();
for (typename Signal0_base<R>::SlotList::iterator
it = Signal0_base<R>::m_slots.begin(); it != end; ++it) {
typename Signal0_base<R>::SlotType* slot = *it;
result = (*slot)();
}
return result;
}
template<typename Merger>
R operator()(R default_result, const Merger& m)
{
R result(default_result);
Merger merger(m);
typename Signal0_base<R>::SlotList::iterator end = Signal0_base<R>::m_slots.end();
for (typename Signal0_base<R>::SlotList::iterator
it = Signal0_base<R>::m_slots.begin(); it != end; ++it) {
typename Signal0_base<R>::SlotType* slot = *it;
result = merger(result, (*slot)());
}
return result;
}
};
// Signal0<void>
template<>
class Signal0<void> : public Signal0_base<void>
{
public:
Signal0() { }
Signal0(const Signal0<void>& s)
: Signal0_base<void>(s) { }
void operator()()
{
SlotList::iterator end = m_slots.end();
for (SlotList::iterator
it = m_slots.begin(); it != end; ++it) {
SlotType* slot = *it;
(*slot)();
}
}
};
// Signal1_base<R, A1> - Base class to delegate responsibility to
// functions of one argument.
template<typename R, typename A1>
class Signal1_base
{
public:
typedef R ReturnType;
typedef Slot1<R, A1> SlotType;
typedef std::vector<SlotType*> SlotList;
protected:
SlotList m_slots;
public:
Signal1_base() { }
Signal1_base(const Signal1_base<R, A1>& s)
{
copy(s);
}
~Signal1_base()
{
disconnectAll();
}
SlotType* addSlot(SlotType* slot)
{
m_slots.push_back(slot);
return slot;
}
template<typename F>
SlotType* connect(const F& f)
{
return addSlot(new Slot1_fun<R, F, A1>(f));
}
template<class T>
SlotType* connect(R (T::*m)(A1), T* t)
{
return addSlot(new Slot1_mem<R, T, A1>(m, t));
}
const SlotList& getSlots() const
{
return m_slots;
}
void disconnect(SlotType* slot)
{
base::remove_from_container(m_slots, slot);
}
void disconnectAll()
{
typename SlotList::iterator end = m_slots.end();
for (typename SlotList::iterator
it = m_slots.begin(); it != end; ++it)
delete *it;
m_slots.clear();
}
bool empty() const
{
return m_slots.empty();
}
Signal1_base& operator=(const Signal1_base<R, A1>& s) {
copy(s);
return *this;
}
private:
void copy(const Signal1_base<R, A1>& s)
{
typename SlotList::const_iterator end = s.m_slots.end();
for (typename SlotList::const_iterator
it = s.m_slots.begin(); it != end; ++it) {
m_slots.push_back((*it)->clone());
}
}
};
// Signal1<R, A1>
template<typename R, typename A1>
class Signal1 : public Signal1_base<R, A1>
{
public:
Signal1() { }
Signal1(const Signal1<R, A1>& s)
: Signal1_base<R, A1>(s) { }
R operator()(A1 a1, R default_result = R())
{
R result(default_result);
typename Signal1_base<R, A1>::SlotList::iterator end = Signal1_base<R, A1>::m_slots.end();
for (typename Signal1_base<R, A1>::SlotList::iterator
it = Signal1_base<R, A1>::m_slots.begin(); it != end; ++it) {
typename Signal1_base<R, A1>::SlotType* slot = *it;
result = (*slot)(a1);
}
return result;
}
template<typename Merger>
R operator()(A1 a1, R default_result, const Merger& m)
{
R result(default_result);
Merger merger(m);
typename Signal1_base<R, A1>::SlotList::iterator end = Signal1_base<R, A1>::m_slots.end();
for (typename Signal1_base<R, A1>::SlotList::iterator
it = Signal1_base<R, A1>::m_slots.begin(); it != end; ++it) {
typename Signal1_base<R, A1>::SlotType* slot = *it;
result = merger(result, (*slot)(a1));
}
return result;
}
};
// Signal1<void, A1>
template<typename A1>
class Signal1<void, A1> : public Signal1_base<void, A1>
{
public:
Signal1() { }
Signal1(const Signal1<void, A1>& s)
: Signal1_base<void, A1>(s) { }
void operator()(A1 a1)
{
typename Signal1_base<void, A1>::SlotList::iterator end = Signal1_base<void, A1>::m_slots.end();
for (typename Signal1_base<void, A1>::SlotList::iterator
it = Signal1_base<void, A1>::m_slots.begin(); it != end; ++it) {
typename Signal1_base<void, A1>::SlotType* slot = *it;
(*slot)(a1);
}
}
};
// Signal2_base<R, A1, A2> - Base class to delegate responsibility to
// functions of two arguments.
template<typename R, typename A1, typename A2>
class Signal2_base
{
public:
typedef R ReturnType;
typedef Slot2<R, A1, A2> SlotType;
typedef std::vector<SlotType*> SlotList;
protected:
SlotList m_slots;
public:
Signal2_base() { }
Signal2_base(const Signal2_base<R, A1, A2>& s)
{
copy(s);
}
~Signal2_base()
{
disconnectAll();
}
SlotType* addSlot(SlotType* slot)
{
m_slots.push_back(slot);
return slot;
}
template<typename F>
SlotType* connect(const F& f)
{
return addSlot(new Slot2_fun<R, F, A1, A2>(f));
}
template<class T>
SlotType* connect(R (T::*m)(A1, A2), T* t)
{
return addSlot(new Slot2_mem<R, T, A1, A2>(m, t));
}
const SlotList& getSlots() const
{
return m_slots;
}
void disconnect(SlotType* slot)
{
base::remove_from_container(m_slots, slot);
}
void disconnectAll()
{
typename SlotList::iterator end = m_slots.end();
for (typename SlotList::iterator
it = m_slots.begin(); it != end; ++it)
delete *it;
m_slots.clear();
}
bool empty() const
{
return m_slots.empty();
}
Signal2_base& operator=(const Signal2_base<R, A1, A2>& s) {
copy(s);
return *this;
}
private:
void copy(const Signal2_base<R, A1, A2>& s)
{
typename SlotList::const_iterator end = s.m_slots.end();
for (typename SlotList::const_iterator
it = s.m_slots.begin(); it != end; ++it) {
m_slots.push_back((*it)->clone());
}
}
};
// Signal2<R, A1>
template<typename R, typename A1, typename A2>
class Signal2 : public Signal2_base<R, A1, A2>
{
public:
Signal2() { }
Signal2(const Signal2<R, A1, A2>& s)
: Signal2_base<R, A1, A2>(s) { }
R operator()(A1 a1, A2 a2, R default_result = R())
{
R result(default_result);
typename Signal2_base<R, A1, A2>::SlotList::iterator end = Signal2_base<R, A1, A2>::m_slots.end();
for (typename Signal2_base<R, A1, A2>::SlotList::iterator
it = Signal2_base<R, A1, A2>::m_slots.begin(); it != end; ++it) {
typename Signal2_base<R, A1, A2>::SlotType* slot = *it;
result = (*slot)(a1, a2);
}
return result;
}
template<typename Merger>
R operator()(A1 a1, A2 a2, R default_result, const Merger& m)
{
R result(default_result);
Merger merger(m);
typename Signal2_base<R, A1, A2>::SlotList::iterator end = Signal2_base<R, A1, A2>::m_slots.end();
for (typename Signal2_base<R, A1, A2>::SlotList::iterator
it = Signal2_base<R, A1, A2>::m_slots.begin(); it != end; ++it) {
typename Signal2_base<R, A1, A2>::SlotType* slot = *it;
result = merger(result, (*slot)(a1, a2));
}
return result;
}
};
// Signal2<void, A1>
template<typename A1, typename A2>
class Signal2<void, A1, A2> : public Signal2_base<void, A1, A2>
{
public:
Signal2() { }
Signal2(const Signal2<void, A1, A2>& s)
: Signal2_base<void, A1, A2>(s) { }
void operator()(A1 a1, A2 a2)
{
typename Signal2_base<void, A1, A2>::SlotList::iterator end = Signal2_base<void, A1, A2>::m_slots.end();
for (typename Signal2_base<void, A1, A2>::SlotList::iterator
it = Signal2_base<void, A1, A2>::m_slots.begin(); it != end; ++it) {
typename Signal2_base<void, A1, A2>::SlotType* slot = *it;
(*slot)(a1, a2);
}
}
};
#endif
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