servicehandler.cxx

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/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
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 *
 *   Licensed to the Apache Software Foundation (ASF) under one or more
 *   contributor license agreements. See the NOTICE file distributed
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 *   ownership. The ASF licenses this file to you under the Apache
 *   License, Version 2.0 (the "License"); you may not use this file
 *   except in compliance with the License. You may obtain a copy of
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#include <dispatch/servicehandler.hxx>
#include <services.h>
 
#include <com/sun/star/frame/DispatchResultState.hpp>
#include <com/sun/star/task/XJobExecutor.hpp>
#include <com/sun/star/lang/XMultiServiceFactory.hpp>
 
#include <comphelper/diagnose_ex.hxx>
#include <cppuhelper/supportsservice.hxx>
#include <utility>
 
namespace framework{
 
constexpr OUStringLiteral PROTOCOL_VALUE = u"service:";
 
// XInterface, XTypeProvider, XServiceInfo
 
OUString SAL_CALL ServiceHandler::getImplementationName()
{
    return "com.sun.star.comp.framework.ServiceHandler";
}
 
sal_Bool SAL_CALL ServiceHandler::supportsService( const OUString& sServiceName )
{
    return cppu::supportsService(this, sServiceName);
}
 
css::uno::Sequence< OUString > SAL_CALL ServiceHandler::getSupportedServiceNames()
{
    return { SERVICENAME_PROTOCOLHANDLER };
}
 
 
ServiceHandler::ServiceHandler( css::uno::Reference< css::uno::XComponentContext > xContext )
        : m_xContext    (std::move( xContext                      ))
{
}
 
ServiceHandler::~ServiceHandler()
{
}
 
css::uno::Reference< css::frame::XDispatch > SAL_CALL ServiceHandler::queryDispatch( const css::util::URL&  aURL    ,
                                                                                     const OUString& /*sTarget*/ ,
                                                                                           sal_Int32        /*nFlags*/  )
{
    css::uno::Reference< css::frame::XDispatch > xDispatcher;
    if (aURL.Complete.startsWith(PROTOCOL_VALUE))
        xDispatcher = this;
    return xDispatcher;
}
 
css::uno::Sequence< css::uno::Reference< css::frame::XDispatch > > SAL_CALL ServiceHandler::queryDispatches( const css::uno::Sequence< css::frame::DispatchDescriptor >& lDescriptor )
{
    sal_Int32 nCount = lDescriptor.getLength();
    css::uno::Sequence< css::uno::Reference< css::frame::XDispatch > > lDispatcher( nCount );
    auto lDispatcherRange = asNonConstRange(lDispatcher);
    for( sal_Int32 i=0; i<nCount; ++i )
    {
        lDispatcherRange[i] = queryDispatch(
                            lDescriptor[i].FeatureURL,
                            lDescriptor[i].FrameName,
                            lDescriptor[i].SearchFlags);
    }
    return lDispatcher;
}
 
void SAL_CALL ServiceHandler::dispatch( const css::util::URL&                                  aURL       ,
                                        const css::uno::Sequence< css::beans::PropertyValue >& /*lArguments*/ )
{
    // dispatch() is an [oneway] call ... and may our user release his reference to us immediately.
    // So we should hold us self alive till this call ends.
    css::uno::Reference< css::frame::XNotifyingDispatch > xSelfHold(this);
    implts_dispatch(aURL);
    // No notification for status listener!
}
 
void SAL_CALL ServiceHandler::dispatchWithNotification( const css::util::URL&                                             aURL      ,
                                                        const css::uno::Sequence< css::beans::PropertyValue >&            /*lArguments*/,
                                                        const css::uno::Reference< css::frame::XDispatchResultListener >& xListener )
{
    // This class was designed to die by reference. And if user release his reference to us immediately after calling this method
    // we can run into some problems. So we hold us self alive till this method ends.
    // Another reason: We can use this reference as source of sending event at the end too.
    css::uno::Reference< css::frame::XNotifyingDispatch > xThis(this);
 
    css::uno::Reference< css::uno::XInterface > xService = implts_dispatch(aURL);
    if (xListener.is())
    {
        css::frame::DispatchResultEvent aEvent;
        if (xService.is())
            aEvent.State = css::frame::DispatchResultState::SUCCESS;
        else
            aEvent.State = css::frame::DispatchResultState::FAILURE;
        aEvent.Result <<= xService; // may NULL for state=FAILED!
        aEvent.Source = xThis;
 
        xListener->dispatchFinished( aEvent );
    }
}
 
css::uno::Reference< css::uno::XInterface > ServiceHandler::implts_dispatch( const css::util::URL& aURL )
{
    // extract service name and may optional given parameters from given URL
    // and use it to create and start the component
    OUString sServiceAndArguments = aURL.Complete.copy(PROTOCOL_VALUE.getLength());
    OUString sServiceName;
    OUString sArguments;
 
    sal_Int32 nArgStart = sServiceAndArguments.indexOf('?');
    if (nArgStart!=-1)
    {
        sServiceName = sServiceAndArguments.copy(0,nArgStart);
        ++nArgStart; // ignore '?'!
        sArguments   = sServiceAndArguments.copy(nArgStart);
    }
    else
    {
        sServiceName = sServiceAndArguments;
    }
 
    if (sServiceName.isEmpty())
        return css::uno::Reference< css::uno::XInterface >();
 
    // If a service doesn't support an optional job executor interface - he can't get
    // any given parameters!
    // Because we can't know if we must call createInstanceWithArguments() or XJobExecutor::trigger() ...
 
    css::uno::Reference< css::uno::XInterface > xService;
    try
    {
        // => a) a service starts running inside his own ctor and we create it only
        xService = m_xContext->getServiceManager()->createInstanceWithContext(sServiceName, m_xContext);
        // or b) he implements the right interface and starts there (may with optional parameters)
        css::uno::Reference< css::task::XJobExecutor > xExecutable(xService, css::uno::UNO_QUERY);
        if (xExecutable.is())
            xExecutable->trigger(sArguments);
    }
    // ignore all errors - inclusive runtime errors!
    // E.g. a script based service (written in Python) could not be executed
    // because it contains syntax errors, which was detected at runtime...
    catch(const css::uno::Exception&)
    {
        TOOLS_WARN_EXCEPTION("fwk.dispatch", "ignored");
        xService.clear();
    }
 
    return xService;
}
 
void SAL_CALL ServiceHandler::addStatusListener( const css::uno::Reference< css::frame::XStatusListener >& /*xListener*/ ,
                                                 const css::util::URL&                                     /*aURL*/      )
{
    // not supported yet
}
 
void SAL_CALL ServiceHandler::removeStatusListener( const css::uno::Reference< css::frame::XStatusListener >& /*xListener*/ ,
                                                    const css::util::URL&                                     /*aURL*/      )
{
    // not supported yet
}
 
}       //  namespace framework
 
 
extern "C" SAL_DLLPUBLIC_EXPORT css::uno::XInterface*
framework_ServiceHandler_get_implementation(
    css::uno::XComponentContext* context, css::uno::Sequence<css::uno::Any> const& )
{
    return cppu::acquire(new framework::ServiceHandler(context));
}
 
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