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170 | #include "fsIMessageDispatcher.h"
#include <algorithm>
#include <fsCore/src/debug/fsAssert.h>
#include "src/components/gui/elements/fsCButtonComponent.h"
typedef std::map<fsCUniqueId, std::vector<fsIMessageListener*>>::iterator messageTypeIter;
fsIMessageDispatcher::sMessageParameters fsIMessageDispatcher::mNullParam;
void fsIMessageDispatcher::priorityListenerButtonClear()
{
if (fsCButtonComponent* const gestComp = dynamic_cast<fsCButtonComponent*>(mPriorityListener))
{
gestComp->reset();
}
}
void fsIMessageDispatcher::priorityListenerRegister(fsIMessageListener* const pListener)
{
fsAssert(mPriorityListener == nullptr, "Priority listener already set.\n");
mPriorityListener = pListener;
}
void fsIMessageDispatcher::priorityListenerDeregister(fsIMessageListener* const pListener)<--- Parameter 'pListener' can be declared as pointer to const
{
fsAssert((!mPriorityListener || mPriorityListener == pListener),
"Incorrect listener is trying to release the priority listener.\n");
if (mPriorityListener == pListener)
{
mPriorityListener = nullptr;
}
}
void fsIMessageDispatcher::listenerRegister(const fsCUniqueId& pMessageType, fsIMessageListener* const pListener)
{
if (mInDispatch)
{
if (mListenersToRegister.end() == std::find(mListenersToRegister.begin(), mListenersToRegister.end(),
std::pair<fsIMessageListener*, fsCUniqueId>(pListener, pMessageType)))
{
mListenersToRegister.push_back(std::pair<fsIMessageListener*, fsCUniqueId>(pListener, pMessageType));
}
return;
}
auto msgTypeIt = mMsgTypes.find(pMessageType);
if (msgTypeIt == mMsgTypes.end())
{
std::vector<fsIMessageListener*> listeners;
listeners.push_back(pListener);
mMsgTypes.insert(std::pair<fsCUniqueId, std::vector<fsIMessageListener*>>(pMessageType, listeners));
}
else
{
fsAssert(std::find(msgTypeIt->second.begin(), msgTypeIt->second.end(), pListener) == msgTypeIt->second.end(),
"Listener already registered.\n");
if (std::end(msgTypeIt->second) == std::find(std::begin(msgTypeIt->second), std::end(msgTypeIt->second), pListener))
{
msgTypeIt->second.push_back(pListener);
std::stable_sort(msgTypeIt->second.begin(), msgTypeIt->second.end(), fsIMessageListener::lessThan);
}
}
}
void fsIMessageDispatcher::listenerDeregister(const fsCUniqueId& pMessageType, fsIMessageListener* const pListener)
{
if (mInDispatch)
{
if (mListenersToDeregister.end() == std::find(mListenersToDeregister.begin(), mListenersToDeregister.end(),
std::pair<fsIMessageListener*, fsCUniqueId>(
pListener, pMessageType)))
{
mListenersToDeregister.push_back(std::pair<fsIMessageListener*, fsCUniqueId>(pListener, pMessageType));
}
return;
}
if (mPriorityListener == pListener)
{
mPriorityListener = nullptr;
}
auto msgTypeIt = mMsgTypes.find(pMessageType);
if (msgTypeIt != mMsgTypes.end())
{
auto listener = std::find(msgTypeIt->second.begin(), msgTypeIt->second.end(), pListener);
if (msgTypeIt->second.end() != listener)
{
msgTypeIt->second.erase(listener);
return;
}
}
fsAssert(false, "Listener not found. Are you sure it was registered?\n");
}
void fsIMessageDispatcher::pendingListenerRegistrationsProcess()
{
if (!mListenersToDeregister.empty())
{
std::for_each(mListenersToDeregister.begin(), mListenersToDeregister.end(),
[this](std::pair<fsIMessageListener*, fsCUniqueId> pending)
{
listenerDeregister(pending.second, pending.first);
});
mListenersToDeregister.clear();
}
if (!mListenersToRegister.empty())
{
std::for_each(mListenersToRegister.begin(), mListenersToRegister.end(),
[this](std::pair<fsIMessageListener*, fsCUniqueId> pending)
{
listenerRegister(pending.second, pending.first);
});
mListenersToRegister.clear();
}
}
fsBool fsIMessageDispatcher::messageDispatch(const fsCUniqueId& pMessageType, const sMessageParameters& pParam)
{
return messageDispatchDo(pMessageType, pParam);
}
fsBool fsIMessageDispatcher::messageDispatchDo(const fsCUniqueId& pMessageType, const sMessageParameters& pParam)
{
mInDispatch = true;
fsBool needToCheckPriority = mPriorityListener != nullptr;
messageTypeIter msgTypeIt = mMsgTypes.find(pMessageType);
if (msgTypeIt != mMsgTypes.end())
{
for (auto listener = msgTypeIt->second.rbegin(); listener != msgTypeIt->second.rend(); ++listener)
{
if (needToCheckPriority && ((*listener)->mPriority == fsIMessageListener::ePRIORITY_NORMAL))
{
if (mPriorityListener->messageProcess(pMessageType, pParam))
{
mInDispatch = false;
pendingListenerRegistrationsProcess();
return true;
}
needToCheckPriority = false;
}
if ((*listener)->messageProcess(pMessageType, pParam))
{
mInDispatch = false;
pendingListenerRegistrationsProcess();
return true;
}
}
}
mInDispatch = false;
pendingListenerRegistrationsProcess();
return false;
}
fsIMessageDispatcher::fsIMessageDispatcher() :
mInDispatch(false),
mPriorityListener(nullptr)
{
}
fsIMessageDispatcher::~fsIMessageDispatcher()
{
}
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