interfacecontainer4.hxx

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#ifndef INCLUDED_COMPHELPER_INTERFACECONTAINER3_H
#define INCLUDED_COMPHELPER_INTERFACECONTAINER3_H

#include <sal/config.h>

#include <com/sun/star/lang/EventObject.hpp>
#include <com/sun/star/lang/DisposedException.hpp>
#include <o3tl/cow_wrapper.hxx>
#include <mutex>
#include <vector>

namespace com::sun::star::uno
{
class XInterface;
}
 //for docpp
namespace comphelper
{
template <class ListenerT> class OInterfaceContainerHelper4;
template <class ListenerT> class OInterfaceIteratorHelper4
{
public:
    OInterfaceIteratorHelper4(OInterfaceContainerHelper4<ListenerT>& rCont_)
        : rCont(rCont_)
        , maData(rCont.maData)
        , nRemain(maData->size())
    {
    }

    bool hasMoreElements() const { return nRemain != 0; }
    css::uno::Reference<ListenerT> const& next();

    void remove();

private:
    OInterfaceContainerHelper4<ListenerT>& rCont;
    o3tl::cow_wrapper<std::vector<css::uno::Reference<ListenerT>>> maData;
    sal_Int32 nRemain;

    OInterfaceIteratorHelper4(const OInterfaceIteratorHelper4&) = delete;
    OInterfaceIteratorHelper4& operator=(const OInterfaceIteratorHelper4&) = delete;
};

template <class ListenerT>
const css::uno::Reference<ListenerT>& OInterfaceIteratorHelper4<ListenerT>::next()
{
    nRemain--;
    return (*maData)[nRemain];
}

template <class ListenerT> void OInterfaceIteratorHelper4<ListenerT>::remove()
{
    rCont.removeInterface((*maData)[nRemain]);
}

template <class ListenerT> class OInterfaceContainerHelper4
{
public:
    OInterfaceContainerHelper4() {}
    sal_Int32 getLength() const;

    std::vector<css::uno::Reference<ListenerT>> getElements() const;

    sal_Int32 addInterface(const css::uno::Reference<ListenerT>& rxIFace);
    sal_Int32 removeInterface(const css::uno::Reference<ListenerT>& rxIFace);
    void disposeAndClear(::std::unique_lock<::std::mutex>& rGuard,
                         const css::lang::EventObject& rEvt);
    void clear();

    template <typename FuncT> inline void forEach(FuncT const& func);

    template <typename EventT>
    inline void notifyEach(void (SAL_CALL ListenerT::*NotificationMethod)(const EventT&),
                           const EventT& Event);

private:
    friend class OInterfaceIteratorHelper4<ListenerT>;
    o3tl::cow_wrapper<std::vector<css::uno::Reference<ListenerT>>> maData;
    OInterfaceContainerHelper4(const OInterfaceContainerHelper4&) = delete;
    OInterfaceContainerHelper4& operator=(const OInterfaceContainerHelper4&) = delete;

private:
    template <typename EventT> class NotifySingleListener
    {
    private:
        typedef void (SAL_CALL ListenerT::*NotificationMethod)(const EventT&);
        NotificationMethod const m_pMethod;
        const EventT& m_rEvent;

    public:
        NotifySingleListener(NotificationMethod method, const EventT& event)
            : m_pMethod(method)
            , m_rEvent(event)
        {
        }

        void operator()(const css::uno::Reference<ListenerT>& listener) const
        {
            (listener.get()->*m_pMethod)(m_rEvent);
        }
    };
};

template <class T>
template <typename FuncT>
inline void OInterfaceContainerHelper4<T>::forEach(FuncT const& func)
{
    OInterfaceIteratorHelper4<T> iter(*this);
    while (iter.hasMoreElements())
    {
        auto xListener = iter.next();
        try
        {
            func(xListener);
        }
        catch (css::lang::DisposedException const& exc)
        {
            if (exc.Context == xListener)
                iter.remove();
        }
    }
}

template <class ListenerT>
template <typename EventT>
inline void OInterfaceContainerHelper4<ListenerT>::notifyEach(
    void (SAL_CALL ListenerT::*NotificationMethod)(const EventT&), const EventT& Event)
{
    forEach<NotifySingleListener<EventT>>(NotifySingleListener<EventT>(NotificationMethod, Event));
}

template <class ListenerT> sal_Int32 OInterfaceContainerHelper4<ListenerT>::getLength() const
{
    return maData->size();
}

template <class ListenerT>
std::vector<css::uno::Reference<ListenerT>>
OInterfaceContainerHelper4<ListenerT>::getElements() const
{
    return *maData;
}

template <class ListenerT>
sal_Int32
OInterfaceContainerHelper4<ListenerT>::addInterface(const css::uno::Reference<ListenerT>& rListener)
{
    assert(rListener.is());
    maData->push_back(rListener);
    return maData->size();
}

template <class ListenerT>
sal_Int32 OInterfaceContainerHelper4<ListenerT>::removeInterface(
    const css::uno::Reference<ListenerT>& rListener)
{
    assert(rListener.is());

    // It is not valid to compare the pointer directly, but it's faster.
    auto it = std::find_if(maData->begin(), maData->end(),
                           [&rListener](const css::uno::Reference<css::uno::XInterface>& rItem) {
                               return rItem.get() == rListener.get();
                           });

    // interface not found, use the correct compare method
    if (it == maData->end())
        it = std::find(maData->begin(), maData->end(), rListener);

    if (it != maData->end())
        maData->erase(it);

    return maData->size();
}

template <class ListenerT>
void OInterfaceContainerHelper4<ListenerT>::disposeAndClear(std::unique_lock<std::mutex>& rGuard,
                                                            const css::lang::EventObject& rEvt)
{
    OInterfaceIteratorHelper4<ListenerT> aIt(*this);
    maData->clear();
    rGuard.unlock();
    while (aIt.hasMoreElements())
    {
        try
        {
            aIt.next()->disposing(rEvt);
        }
        catch (css::uno::RuntimeException&)
        {
            // be robust, if e.g. a remote bridge has disposed already.
            // there is no way to delegate the error to the caller :o(.
        }
    }
}

template <class ListenerT> void OInterfaceContainerHelper4<ListenerT>::clear() { maData->clear(); }
}
#endif

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