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| -rw-r--r-- | framework/source/dispatch/interceptionhelper.cxx | 257 |
1 files changed, 257 insertions, 0 deletions
diff --git a/framework/source/dispatch/interceptionhelper.cxx b/framework/source/dispatch/interceptionhelper.cxx new file mode 100644 index 000000000..899ce2440 --- /dev/null +++ b/framework/source/dispatch/interceptionhelper.cxx @@ -0,0 +1,257 @@ +/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */ +/* + * This file is part of the LibreOffice project. + * + * This Source Code Form is subject to the terms of the Mozilla Public + * License, v. 2.0. If a copy of the MPL was not distributed with this + * file, You can obtain one at http://mozilla.org/MPL/2.0/. + * + * This file incorporates work covered by the following license notice: + * + * Licensed to the Apache Software Foundation (ASF) under one or more + * contributor license agreements. See the NOTICE file distributed + * with this work for additional information regarding copyright + * 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 + * the License at http://www.apache.org/licenses/LICENSE-2.0 . + */ + +#include <dispatch/interceptionhelper.hxx> + +#include <com/sun/star/frame/XInterceptorInfo.hpp> +#include <osl/diagnose.h> +#include <vcl/svapp.hxx> + +namespace framework{ + +InterceptionHelper::InterceptionHelper(const css::uno::Reference< css::frame::XFrame >& xOwner, + const css::uno::Reference< css::frame::XDispatchProvider >& xSlave) + : m_xOwnerWeak (xOwner ) + , m_xSlave (xSlave ) +{ +} + +InterceptionHelper::~InterceptionHelper() +{ +} + +css::uno::Reference< css::frame::XDispatch > SAL_CALL InterceptionHelper::queryDispatch(const css::util::URL& aURL , + const OUString& sTargetFrameName, + sal_Int32 nSearchFlags ) +{ + css::uno::Reference<css::frame::XDispatchProvider> xInterceptor; + // SAFE { + { + SolarMutexGuard aReadLock; + + // a) first search an interceptor, which match to this URL by its URL pattern registration + // Note: if it return NULL - it does not mean an empty interceptor list automatically! + InterceptorList::const_iterator pIt = m_lInterceptionRegs.findByPattern(aURL.Complete); + if (pIt != m_lInterceptionRegs.end()) + xInterceptor = pIt->xInterceptor; + + // b) No match by registration - but a valid interceptor list. + // Find first interceptor w/o pattern, so we need to query it + if (!xInterceptor.is()) + { + for (auto const& lInterceptionReg : m_lInterceptionRegs) + { + if (!lInterceptionReg.lURLPattern.hasElements()) + { + // no pattern -> need to ask this guy! + xInterceptor = lInterceptionReg.xInterceptor; + break; + } + } + // if we didn't find any non-pattern interceptor, there's no-one + // registered for this command url (we already searched for matching + // patterns above) + } + // c) No registered interceptor => use our direct slave. + // This helper exist by design and must be valid everytimes ... + // But to be more feature proof - we should check that .-) + if (!xInterceptor.is() && m_xSlave.is()) + xInterceptor = m_xSlave; + } + // } SAFE + + css::uno::Reference< css::frame::XDispatch > xReturn; + if (xInterceptor.is()) + xReturn = xInterceptor->queryDispatch(aURL, sTargetFrameName, nSearchFlags); + return xReturn; +} + +css::uno::Sequence< css::uno::Reference< css::frame::XDispatch > > SAL_CALL InterceptionHelper::queryDispatches( const css::uno::Sequence< css::frame::DispatchDescriptor >& lDescriptor ) +{ + sal_Int32 c = lDescriptor.getLength(); + css::uno::Sequence< css::uno::Reference< css::frame::XDispatch > > lDispatches (c); + css::uno::Reference< css::frame::XDispatch >* pDispatches = lDispatches.getArray(); + const css::frame::DispatchDescriptor* pDescriptor = lDescriptor.getConstArray(); + + for (sal_Int32 i=0; i<c; ++i) + pDispatches[i] = queryDispatch(pDescriptor[i].FeatureURL, pDescriptor[i].FrameName, pDescriptor[i].SearchFlags); + + return lDispatches; +} + +void SAL_CALL InterceptionHelper::registerDispatchProviderInterceptor(const css::uno::Reference< css::frame::XDispatchProviderInterceptor >& xInterceptor) +{ + // reject incorrect calls of this interface method + css::uno::Reference< css::frame::XDispatchProvider > xThis(static_cast< ::cppu::OWeakObject* >(this), css::uno::UNO_QUERY); + if (!xInterceptor.is()) + throw css::uno::RuntimeException("NULL references not allowed as in parameter", xThis); + + // Fill a new info structure for new interceptor. + // Save his reference and try to get an additional URL/pattern list from him. + // If no list exist register these interceptor for all dispatch events with "*"! + InterceptorInfo aInfo; + + aInfo.xInterceptor = xInterceptor; + css::uno::Reference< css::frame::XInterceptorInfo > xInfo(xInterceptor, css::uno::UNO_QUERY); + if (xInfo.is()) + aInfo.lURLPattern = xInfo->getInterceptedURLs(); + else + { + aInfo.lURLPattern.realloc(1); + aInfo.lURLPattern[0] = "*"; + } + + // SAFE { + SolarMutexClearableGuard aWriteLock; + + // a) no interceptor at all - set this instance as master for given interceptor + // and set our slave as its slave - and put this interceptor to the list. + // Its place there doesn't matter. Because this list is currently empty. + if (m_lInterceptionRegs.empty()) + { + xInterceptor->setMasterDispatchProvider(xThis ); + xInterceptor->setSlaveDispatchProvider (m_xSlave); + m_lInterceptionRegs.push_back(aInfo); + } + + // b) OK - there is at least one interceptor already registered. + // It's slave and it's master must be valid references ... + // because we created it. + + // insert it before any other existing interceptor - means at the beginning of our list. + else + { + css::uno::Reference< css::frame::XDispatchProvider > xSlaveD = m_lInterceptionRegs.begin()->xInterceptor; + css::uno::Reference< css::frame::XDispatchProviderInterceptor > xSlaveI (xSlaveD , css::uno::UNO_QUERY); + + xInterceptor->setMasterDispatchProvider(xThis ); + xInterceptor->setSlaveDispatchProvider (xSlaveD ); + xSlaveI->setMasterDispatchProvider (aInfo.xInterceptor); + + m_lInterceptionRegs.push_front(aInfo); + } + + css::uno::Reference< css::frame::XFrame > xOwner(m_xOwnerWeak.get(), css::uno::UNO_QUERY); + + aWriteLock.clear(); + // } SAFE + + // Don't forget to send a frame action event "context changed". + // Any cached dispatch objects must be validated now! + if (xOwner.is()) + xOwner->contextChanged(); +} + +void SAL_CALL InterceptionHelper::releaseDispatchProviderInterceptor(const css::uno::Reference< css::frame::XDispatchProviderInterceptor >& xInterceptor) +{ + // reject wrong calling of this interface method + css::uno::Reference< css::frame::XDispatchProvider > xThis(static_cast< ::cppu::OWeakObject* >(this), css::uno::UNO_QUERY); + if (!xInterceptor.is()) + throw css::uno::RuntimeException("NULL references not allowed as in parameter", xThis); + + // SAFE { + SolarMutexClearableGuard aWriteLock; + + // search this interceptor ... + // If it could be located inside cache - + // use its slave/master relations to update the interception list; + // set empty references for it as new master and slave; + // and release it from out cache. + InterceptorList::iterator pIt = m_lInterceptionRegs.findByReference(xInterceptor); + if (pIt != m_lInterceptionRegs.end()) + { + css::uno::Reference< css::frame::XDispatchProvider > xSlaveD = xInterceptor->getSlaveDispatchProvider(); + css::uno::Reference< css::frame::XDispatchProvider > xMasterD = xInterceptor->getMasterDispatchProvider(); + css::uno::Reference< css::frame::XDispatchProviderInterceptor > xSlaveI (xSlaveD , css::uno::UNO_QUERY); + css::uno::Reference< css::frame::XDispatchProviderInterceptor > xMasterI (xMasterD , css::uno::UNO_QUERY); + + if (xMasterI.is()) + xMasterI->setSlaveDispatchProvider(xSlaveD); + + if (xSlaveI.is()) + xSlaveI->setMasterDispatchProvider(xMasterD); + + xInterceptor->setSlaveDispatchProvider (css::uno::Reference< css::frame::XDispatchProvider >()); + xInterceptor->setMasterDispatchProvider(css::uno::Reference< css::frame::XDispatchProvider >()); + + m_lInterceptionRegs.erase(pIt); + } + + css::uno::Reference< css::frame::XFrame > xOwner(m_xOwnerWeak.get(), css::uno::UNO_QUERY); + + aWriteLock.clear(); + // } SAFE + + // Don't forget to send a frame action event "context changed". + // Any cached dispatch objects must be validated now! + if (xOwner.is()) + xOwner->contextChanged(); +} + +#define FORCE_DESTRUCTION_OF_INTERCEPTION_CHAIN +void SAL_CALL InterceptionHelper::disposing(const css::lang::EventObject& aEvent) +{ + #ifdef FORCE_DESTRUCTION_OF_INTERCEPTION_CHAIN + // SAFE -> + SolarMutexResettableGuard aReadLock; + + // check call... we accept such disposing calls only from our owner frame. + css::uno::Reference< css::frame::XFrame > xOwner(m_xOwnerWeak.get(), css::uno::UNO_QUERY); + if (aEvent.Source != xOwner) + return; + + // Because every interceptor hold at least one reference to us ... and we destruct this list + // of interception objects ... we should hold ourself alive .-) + css::uno::Reference< css::frame::XDispatchProvider > xThis(static_cast< ::cppu::OWeakObject* >(this), css::uno::UNO_QUERY_THROW); + + // We need a full copy of all currently registered interceptor objects. + // Otherwise we can't iterate over this vector without the risk, that our iterator will be invalid. + // Because this vetor will be influenced by every deregistered interceptor. + InterceptionHelper::InterceptorList aCopy = m_lInterceptionRegs; + + aReadLock.clear(); + // <- SAFE + + for (auto & elem : aCopy) + { + if (elem.xInterceptor.is()) + { + css::uno::Reference< css::frame::XDispatchProviderInterceptor > xInterceptor(elem.xInterceptor, css::uno::UNO_QUERY_THROW); + releaseDispatchProviderInterceptor(xInterceptor); + elem.xInterceptor.clear(); + } + } + + aCopy.clear(); + + #if OSL_DEBUG_LEVEL > 0 + // SAFE -> + aReadLock.reset(); + if (!m_lInterceptionRegs.empty() ) + OSL_FAIL("There are some pending interceptor objects, which seems to be registered during (!) the destruction of a frame."); + aReadLock.clear(); + // <- SAFE + #endif // ODL_DEBUG_LEVEL>0 + + #endif // FORCE_DESTRUCTION_OF_INTERCEPTION_CHAIN +} + +} // namespace framework + +/* vim:set shiftwidth=4 softtabstop=4 expandtab: */ |