listenercalls.cxx

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 *
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#include <com/sun/star/util/XModifyListener.hpp>
#include <osl/diagnose.h>
 
#include <listenercalls.hxx>
 
using namespace com::sun::star;
 
ScUnoListenerCalls::ScUnoListenerCalls() {}
 
ScUnoListenerCalls::~ScUnoListenerCalls()
{
    OSL_ENSURE(aEntries.empty(), "unhandled listener calls remaining");
}
 
void ScUnoListenerCalls::Add(const uno::Reference<util::XModifyListener>& rListener,
                             const lang::EventObject& rEvent)
{
    if (rListener.is())
        aEntries.emplace_back(rListener, rEvent);
}
 
void ScUnoListenerCalls::ExecuteAndClear()
{
    //  Execute all stored calls and remove them from the list.
    //  During each modified() call, Add may be called again.
    //  These new calls are executed here, too.
 
    std::list<ScUnoListenerEntry>::iterator aItr(aEntries.begin());
    while (aItr != aEntries.end())
    {
        ScUnoListenerEntry aEntry = *aItr;
        try
        {
            aEntry.xListener->modified(aEntry.aEvent);
        }
        catch (const uno::RuntimeException&)
        {
            // the listener is an external object and may throw a RuntimeException
            // for reasons we don't know
        }
 
        //  New calls that are added during the modified() call are appended to the end
        //  of aEntries, so the loop will catch them, too (as long as erase happens
        //  after modified).
 
        aItr = aEntries.erase(aItr);
    }
}
 
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