SlotStateListener.cxx

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#include <tools/SlotStateListener.hxx>
#include <com/sun/star/frame/XDispatchProvider.hpp>
#include <com/sun/star/frame/XDispatch.hpp>
#include <com/sun/star/util/URLTransformer.hpp>
#include <com/sun/star/util/XURLTransformer.hpp>
 
#include <comphelper/processfactory.hxx>
 
using namespace ::com::sun::star;
 
namespace sd::tools {
 
SlotStateListener::SlotStateListener (
    Link<const OUString&,void> const & rCallback,
    const uno::Reference<frame::XDispatchProvider>& rxDispatchProvider,
    const OUString& rSlotName)
    : mxDispatchProviderWeak(nullptr)
{
    SetCallback(rCallback);
    ConnectToDispatchProvider(rxDispatchProvider);
    ObserveSlot(rSlotName);
}
 
SlotStateListener::~SlotStateListener()
{
    ReleaseListeners();
}
 
void SlotStateListener::SetCallback (const Link<const OUString&,void>& rCallback)
{
    ThrowIfDisposed();
 
    maCallback = rCallback;
}
 
void SlotStateListener::ConnectToDispatchProvider (
    const uno::Reference<frame::XDispatchProvider>& rxDispatchProvider)
{
    ThrowIfDisposed();
 
    // When we are listening to state changes of slots of another frame then
    // release these listeners first.
    if ( ! maRegisteredURLList.empty())
        ReleaseListeners();
 
    mxDispatchProviderWeak = rxDispatchProvider;
}
 
void SlotStateListener::ObserveSlot (const OUString& rSlotName)
{
    ThrowIfDisposed();
 
    if (maCallback.IsSet())
    {
        // Connect the state change listener.
        util::URL aURL (MakeURL(rSlotName));
        uno::Reference<frame::XDispatch> xDispatch (GetDispatch(aURL));
        if (xDispatch.is())
        {
            maRegisteredURLList.push_back(aURL);
            xDispatch->addStatusListener(this,aURL);
        }
    }
}
 
void SlotStateListener::disposing(std::unique_lock<std::mutex>&)
{
    ReleaseListeners();
    mxDispatchProviderWeak.clear();
    maCallback = Link<const OUString&,void>();
}
 
util::URL SlotStateListener::MakeURL (const OUString& rSlotName)
{
    util::URL aURL;
    aURL.Complete = rSlotName;
 
    uno::Reference<util::XURLTransformer> xTransformer(util::URLTransformer::create(::comphelper::getProcessComponentContext()));
    xTransformer->parseStrict(aURL);
 
    return aURL;
}
 
uno::Reference<frame::XDispatch>
    SlotStateListener::GetDispatch (const util::URL& rURL) const
{
    uno::Reference<frame::XDispatch> xDispatch;
 
    uno::Reference<frame::XDispatchProvider> xDispatchProvider (mxDispatchProviderWeak);
    if (xDispatchProvider.is())
        xDispatch = xDispatchProvider->queryDispatch(rURL, OUString(), 0);
 
    return xDispatch;
}
 
void SlotStateListener::statusChanged (
    const frame::FeatureStateEvent& rState)
{
    ThrowIfDisposed();
    OUString sSlotName (rState.FeatureURL.Complete);
    maCallback.Call(sSlotName);
}
 
void SlotStateListener::ReleaseListeners()
{
    for (const auto& rURL : maRegisteredURLList)
    {
        uno::Reference<frame::XDispatch> xDispatch (GetDispatch(rURL));
        if (xDispatch.is())
        {
            xDispatch->removeStatusListener(this,rURL);
        }
    }
}
 
//=====  lang::XEventListener  ================================================
 
void SAL_CALL SlotStateListener::disposing (
    const lang::EventObject& )
{
}
 
void SlotStateListener::ThrowIfDisposed()
{
    if (m_bDisposed)
    {
        throw lang::DisposedException ("SlideSorterController object has already been disposed",
            static_cast<uno::XWeak*>(this));
    }
}
 
} // end of namespace ::sd::tools
 
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