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Diffstat (limited to 'framework/source/dispatch/dispatchprovider.cxx')
| -rw-r--r-- | framework/source/dispatch/dispatchprovider.cxx | 585 |
1 files changed, 585 insertions, 0 deletions
diff --git a/framework/source/dispatch/dispatchprovider.cxx b/framework/source/dispatch/dispatchprovider.cxx new file mode 100644 index 000000000..8328e9c42 --- /dev/null +++ b/framework/source/dispatch/dispatchprovider.cxx @@ -0,0 +1,585 @@ +/* -*- 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/dispatchprovider.hxx> +#include <loadenv/loadenv.hxx> +#include <dispatch/loaddispatcher.hxx> +#include <dispatch/closedispatcher.hxx> +#include <dispatch/startmoduledispatcher.hxx> + +#include <pattern/window.hxx> +#include <targets.h> +#include "isstartmoduledispatch.hxx" + +#include <com/sun/star/frame/XDesktop.hpp> +#include <com/sun/star/frame/FrameSearchFlag.hpp> +#include <com/sun/star/uno/Exception.hpp> +#include <com/sun/star/lang/XMultiServiceFactory.hpp> +#include <com/sun/star/lang/XInitialization.hpp> +#include <com/sun/star/util/XCacheInfo.hpp> + +#include <rtl/ustring.hxx> +#include <utility> +#include <vcl/svapp.hxx> +#include <sal/log.hxx> +#include <framework/dispatchhelper.hxx> + +namespace framework{ + +/** + @short standard ctor/dtor + @descr These initialize a new instance of this class with needed information for work. + We hold a weakreference to our owner frame which start dispatches at us. + We can't use a normal reference because he hold a reference of us too ... + nobody can die so ...! + + @seealso using at owner + + @param rxContext + reference to servicemanager to create new services. + @param xFrame + reference to our owner frame. +*/ +DispatchProvider::DispatchProvider( css::uno::Reference< css::uno::XComponentContext > xContext , + const css::uno::Reference< css::frame::XFrame >& xFrame ) + : m_xContext (std::move( xContext )) + , m_xFrame ( xFrame ) +{ +} + +/** + @short protected(!) dtor for deinitializing + @descr We made it protected to prevent using of us as base class instead as a member. + */ +DispatchProvider::~DispatchProvider() +{ +} + +/** + @interface XDispatchProvider + @short search a dispatcher for given URL + @descr If no interceptor is set on owner, we search for right frame and dispatch URL to it. + If no frame was found, we do nothing. + But we don't do it directly here. We detect the type of our owner frame and calls + specialized queryDispatch() helper dependen from that. Because a Desktop handle some + requests in another way then a normal frame. + + @param aURL + URL to dispatch. + @param sTargetFrameName + name of searched frame. + @param nSearchFlags + flags for searching. + @return A reference to a dispatch object for this URL (if someone was found!). + + @threadsafe yes +*/ +css::uno::Reference< css::frame::XDispatch > SAL_CALL DispatchProvider::queryDispatch( const css::util::URL& aURL , + const OUString& sTargetFrameName , + sal_Int32 nSearchFlags ) +{ + css::uno::Reference< css::frame::XDispatch > xDispatcher; + + css::uno::Reference< css::frame::XFrame > xOwner(m_xFrame); + + css::uno::Reference< css::frame::XDesktop > xDesktopCheck( xOwner, css::uno::UNO_QUERY ); + + if (xDesktopCheck.is()) + xDispatcher = implts_queryDesktopDispatch(xOwner, aURL, sTargetFrameName, nSearchFlags); + else + xDispatcher = implts_queryFrameDispatch(xOwner, aURL, sTargetFrameName, nSearchFlags); + + return xDispatcher; +} + +/** + @interface XDispatchProvider + @short do the same like queryDispatch() ... but handle multiple dispatches at the same time + @descr It's an optimism. User give us a list of queries ... and we return a list of dispatcher. + If one of given queries couldn't be solved to a real existing dispatcher ... + we return a list with empty references in it! Order of both lists will be retained! + + @seealso method queryDispatch() + + @param lDescriptions + a list of all dispatch parameters for multiple requests + @return A reference a list of dispatch objects for these URLs - may with some <NULL/> values inside. + + @threadsafe yes +*/ +css::uno::Sequence< css::uno::Reference< css::frame::XDispatch > > SAL_CALL DispatchProvider::queryDispatches( const css::uno::Sequence< css::frame::DispatchDescriptor >& lDescriptions ) +{ + // Create return list - which must have same size then the given descriptor + // It's not allowed to pack it! + sal_Int32 nCount = lDescriptions.getLength(); + css::uno::Sequence< css::uno::Reference< css::frame::XDispatch > > lDispatcher( nCount ); + auto lDispatcherRange = asNonConstRange(lDispatcher); + // Step over all descriptors and try to get any dispatcher for it. + for( sal_Int32 i=0; i<nCount; ++i ) + { + lDispatcherRange[i] = queryDispatch( lDescriptions[i].FeatureURL , + lDescriptions[i].FrameName , + lDescriptions[i].SearchFlags ); + } + + return lDispatcher; +} + +/** + @short helper for queryDispatch() + @descr Every member of the frame tree (frame, desktop) must handle such request + in another way. So we implement different specialized methods for everyone. + + @threadsafe yes + */ +css::uno::Reference< css::frame::XDispatch > DispatchProvider::implts_queryDesktopDispatch( const css::uno::Reference< css::frame::XFrame >& xDesktop , + const css::util::URL& aURL , + const OUString& sTargetFrameName , + sal_Int32 nSearchFlags ) +{ + css::uno::Reference< css::frame::XDispatch > xDispatcher; + + // ignore wrong requests which are not supported + if ( + (sTargetFrameName==SPECIALTARGET_PARENT ) || // we have no parent by definition + (sTargetFrameName==SPECIALTARGET_BEAMER ) // beamer frames are allowed as child of tasks only - + // and they exist more than ones. We have no idea which our sub tasks is the right one + ) + { + return nullptr; + } + + // I) handle special cases which not right for using findFrame() first + + // I.I) "_blank" + // It's not the right place to create a new task here - because we are queried for a dispatch object + // only, which can handle such request. Such dispatcher should create the required task on demand. + // Normally the functionality for "_blank" is provided by findFrame() - but that would create it directly + // here. that's why we must "intercept" here. + + if (sTargetFrameName==SPECIALTARGET_BLANK) + { + if (implts_isLoadableContent(aURL)) + xDispatcher = implts_getOrCreateDispatchHelper( E_BLANKDISPATCHER, xDesktop ); + } + + // I.II) "_default" + // This is a combination of search an empty task for recycling - or create a new one. + + else if (sTargetFrameName==SPECIALTARGET_DEFAULT) + { + if (implts_isLoadableContent(aURL)) + xDispatcher = implts_getOrCreateDispatchHelper( E_DEFAULTDISPATCHER, xDesktop ); + + if (isStartModuleDispatch(aURL)) + xDispatcher = implts_getOrCreateDispatchHelper( E_STARTMODULEDISPATCHER, xDesktop ); + } + + // I.III) "_self", "", "_top" + // The desktop can't load any document - but he can handle some special protocols like "uno", "slot" ... + // Why is "top" here handled too? Because the desktop is the topest frame. Normally it's superfluous + // to use this target - but we can handle it in the same manner then "_self". + + else if ( + (sTargetFrameName==SPECIALTARGET_SELF) || + (sTargetFrameName==SPECIALTARGET_TOP ) || + (sTargetFrameName.isEmpty()) + ) + { + xDispatcher = implts_searchProtocolHandler(aURL); + } + + // I.IV) no further special targets exist + // Now we have to search for the right target frame by calling findFrame() - but should provide our code + // against creation of a new task if no frame could be found. + // I said it before - it's allowed for dispatch() only. + + else + { + sal_Int32 nRightFlags = nSearchFlags & ~css::frame::FrameSearchFlag::CREATE; + + // try to find any existing target and ask him for his dispatcher + css::uno::Reference< css::frame::XFrame > xFoundFrame = xDesktop->findFrame(sTargetFrameName, nRightFlags); + if (xFoundFrame.is()) + { + css::uno::Reference< css::frame::XDispatchProvider > xProvider( xFoundFrame, css::uno::UNO_QUERY ); + xDispatcher = xProvider->queryDispatch(aURL,SPECIALTARGET_SELF,0); + } + // if it couldn't be found - but creation was allowed + // use special dispatcher for creation or forwarding to the browser + else if (nSearchFlags & css::frame::FrameSearchFlag::CREATE) + xDispatcher = implts_getOrCreateDispatchHelper( E_CREATEDISPATCHER, xDesktop, sTargetFrameName, nSearchFlags ); + } + + return xDispatcher; +} + +css::uno::Reference< css::frame::XDispatch > DispatchProvider::implts_queryFrameDispatch( const css::uno::Reference< css::frame::XFrame >& xFrame , + const css::util::URL& aURL , + const OUString& sTargetFrameName , + sal_Int32 nSearchFlags ) +{ + css::uno::Reference< css::frame::XDispatch > xDispatcher; + + // 0) Some URLs are dispatched in a generic way (e.g. by the menu) using the default target "". + // But they are specified to use her own fix target. Detect such URLs here and use the correct target. + + // I) handle special cases which not right for using findFrame() first + + // I.I) "_blank", "_default" + // It's not the right place to create a new task here. Only the desktop can do that. + // Normally the functionality for "_blank" is provided by findFrame() - but that would create it directly + // here. that's why we must "intercept" here. + + if ( + (sTargetFrameName==SPECIALTARGET_BLANK ) || + (sTargetFrameName==SPECIALTARGET_DEFAULT) + ) + { + css::uno::Reference< css::frame::XDispatchProvider > xParent( xFrame->getCreator(), css::uno::UNO_QUERY ); + if (xParent.is()) + xDispatcher = xParent->queryDispatch(aURL, sTargetFrameName, 0); // it's a special target - ignore search flags + } + + // I.II) "_beamer" + // Special sub frame of a top frame only. Search or create it. ... OK it's currently a little bit HACKI. + // Only the sfx (means the controller) can create it. + + else if (sTargetFrameName==SPECIALTARGET_BEAMER) + { + css::uno::Reference< css::frame::XDispatchProvider > xBeamer( xFrame->findFrame( SPECIALTARGET_BEAMER, css::frame::FrameSearchFlag::CHILDREN | css::frame::FrameSearchFlag::SELF ), css::uno::UNO_QUERY ); + if (xBeamer.is()) + { + xDispatcher = xBeamer->queryDispatch(aURL, SPECIALTARGET_SELF, 0); + } + else + { + css::uno::Reference< css::frame::XDispatchProvider > xController( xFrame->getController(), css::uno::UNO_QUERY ); + if (xController.is()) + // force using of special target - but use original search flags + // May the caller used the CREATE flag or not! + xDispatcher = xController->queryDispatch(aURL, SPECIALTARGET_BEAMER, nSearchFlags); + } + } + + // I.IV) "_parent" + // Our parent frame (if it exist) should handle this URL. + + else if (sTargetFrameName==SPECIALTARGET_PARENT) + { + css::uno::Reference< css::frame::XDispatchProvider > xParent( xFrame->getCreator(), css::uno::UNO_QUERY ); + if (xParent.is()) + // SELF => we must address the parent directly... and not his parent or any other parent! + xDispatcher = xParent->queryDispatch(aURL, SPECIALTARGET_SELF, 0); + } + + // I.V) "_top" + // This request must be forwarded to any parent frame, till we reach a top frame. + // If no parent exist, we can handle itself. + + else if (sTargetFrameName==SPECIALTARGET_TOP) + { + if (xFrame->isTop()) + { + // If we are this top frame itself (means our owner frame) + // we should call ourself recursiv with a better target "_self". + // So we can share the same code! (see reaction for "_self" inside this method too.) + xDispatcher = queryDispatch(aURL,SPECIALTARGET_SELF,0); + } + else + { + css::uno::Reference< css::frame::XDispatchProvider > xParent( xFrame->getCreator(), css::uno::UNO_QUERY ); + // Normally if isTop() returned sal_False ... the parent frame MUST(!) exist ... + // But it seems to be better to check that here to prevent us against an access violation. + if (xParent.is()) + xDispatcher = xParent->queryDispatch(aURL, SPECIALTARGET_TOP, 0); + } + } + + // I.VI) "_self", "" + // Our owner frame should handle this URL. But we can't do it for all of them. + // So we ask the internal set controller first. If he disagree we try to find a registered + // protocol handler. If this failed too - we check for a loadable content and in case of true + // we load it into the frame by returning specialized dispatch object. + + else if ( + (sTargetFrameName==SPECIALTARGET_SELF) || + (sTargetFrameName.isEmpty()) + ) + { + // There exist a hard coded interception for special URLs. + if ( aURL.Complete == ".uno:CloseDoc" || aURL.Complete == ".uno:CloseWin" ) + { + css::uno::Reference< css::frame::XDispatchProvider > xParent( xFrame->getCreator(), css::uno::UNO_QUERY ); + // In case the frame is not a top one, is not based on system window and has a parent, + // the parent frame should be queried for the correct dispatcher. + // See i93473 + if ( + !WindowHelper::isTopWindow(xFrame->getContainerWindow()) && + !VCLUnoHelper::GetWindow(xFrame->getContainerWindow())->IsSystemWindow() && + xParent.is() + ) + xDispatcher = xParent->queryDispatch(aURL, SPECIALTARGET_SELF, 0); + else + xDispatcher = implts_getOrCreateDispatchHelper( E_CLOSEDISPATCHER, xFrame ); + } + else if ( aURL.Complete == ".uno:CloseFrame" ) + xDispatcher = implts_getOrCreateDispatchHelper( E_CLOSEDISPATCHER, xFrame ); + + if ( ! xDispatcher.is()) + { + // Ask our controller for his agreement for these dispatched URL ... + // because some URLs are internal and can be handled faster by SFX - which most is the current controller! + // But in case of e.g. the bibliography not all queries will be handled successfully here. + css::uno::Reference< css::frame::XDispatchProvider > xController( xFrame->getController(), css::uno::UNO_QUERY ); + if (xController.is()) + xDispatcher = xController->queryDispatch(aURL, SPECIALTARGET_SELF, 0); + } + + // If controller has no fun to dispatch these URL - we must search another right dispatcher. + // Search for any registered protocol handler first. + if (!xDispatcher.is()) + xDispatcher = implts_searchProtocolHandler(aURL); + + // Not for controller - not for protocol handler + // It should be a loadable content - may be a file. Check it ... + // This check is necessary to found out, that + // support for some protocols isn't installed by user. May be + // "ftp" isn't available. So we suppress creation of our self dispatcher. + // The result will be clear. He can't handle it - but he would try it. + if ( + ( ! xDispatcher.is() ) && + ( implts_isLoadableContent(aURL) ) + ) + { + xDispatcher = implts_getOrCreateDispatchHelper( E_SELFDISPATCHER, xFrame ); + } + } + + // I.VII) no further special handlings exist + // Now we have to search for the right target frame by calling findFrame() - but should provide our code + // against creation of a new task if no frame could be found. + // I said it before - it's allowed for dispatch() only. + + else + { + sal_Int32 nRightFlags = nSearchFlags & ~css::frame::FrameSearchFlag::CREATE; + + // try to find any existing target and ask him for his dispatcher + css::uno::Reference< css::frame::XFrame > xFoundFrame = xFrame->findFrame(sTargetFrameName, nRightFlags); + if (xFoundFrame.is()) + { + // Attention: Found target is our own owner frame! + // Don't ask him for his dispatcher. We know it already - it's our self dispatch helper. + // Otherwise we can start a never ending recursiv call. Why? + // Somewhere called our owner frame - he called some interceptor objects - and may by this dispatch provider + // is called. If wa use queryDispatch() on our owner frame again - we start this call stack again ... and again. + if (xFoundFrame==xFrame) + xDispatcher = implts_getOrCreateDispatchHelper( E_SELFDISPATCHER, xFrame ); + else + { + css::uno::Reference< css::frame::XDispatchProvider > xProvider( xFoundFrame, css::uno::UNO_QUERY ); + xDispatcher = xProvider->queryDispatch(aURL,SPECIALTARGET_SELF,0); + } + } + else + // if it couldn't be found - but creation was allowed + // forward request to the desktop. + // Note: The given target name must be used to set the name on new created task! + // Don't forward request by changing it to a special one e.g _blank. + // Use the CREATE flag only to prevent call against further searches. + // We already know it - the target must be created new. + if (nSearchFlags & css::frame::FrameSearchFlag::CREATE) + { + css::uno::Reference< css::frame::XDispatchProvider > xParent( xFrame->getCreator(), css::uno::UNO_QUERY ); + if (xParent.is()) + xDispatcher = xParent->queryDispatch(aURL, sTargetFrameName, css::frame::FrameSearchFlag::CREATE); + } + } + + return xDispatcher; +} + +/** + @short search for a registered protocol handler and ask him for a dispatch object + @descr We search a suitable handler inside our cfg package org.openoffice.Office.ProtocolHandler. + If we found anyone, we create and initialize it. Initialize means: we set our owner frame on it + as context information. He can use it or leave it. Of course - we are aware of handler implementations, + which doesn't support initialization. It's an optional feature. + + @param aURL + the dispatch URL for which may a handler is registered + + @return A dispatch object if a handler was found and agree with the given URL or <NULL/> otherwise. + + @threadsafe yes +*/ +css::uno::Reference< css::frame::XDispatch > DispatchProvider::implts_searchProtocolHandler( const css::util::URL& aURL ) +{ + css::uno::Reference< css::frame::XDispatch > xDispatcher; + ProtocolHandler aHandler; + + // This member is threadsafe by himself and lives if we live - we don't need any mutex here. + if (m_aProtocolHandlerCache.search(aURL,&aHandler)) + { + css::uno::Reference< css::frame::XDispatchProvider > xHandler; + { + SolarMutexGuard g; + + // create it + bool bInitialize = true; + try + { + // Only create the protocol handler instance once, the creation is expensive. + auto it = m_aProtocolHandlers.find(aHandler.m_sUNOName); + if (it == m_aProtocolHandlers.end()) + { + xHandler.set( + css::uno::Reference<css::lang::XMultiServiceFactory>(m_xContext->getServiceManager(), css::uno::UNO_QUERY_THROW) + ->createInstance(aHandler.m_sUNOName), + css::uno::UNO_QUERY); + + // Check if the handler explicitly requested to avoid caching. + css::uno::Reference<css::util::XCacheInfo> xCacheInfo(xHandler, css::uno::UNO_QUERY); + if (!xCacheInfo.is() || xCacheInfo->isCachingAllowed()) + { + m_aProtocolHandlers.emplace(aHandler.m_sUNOName, xHandler); + } + } + else + { + xHandler = it->second; + bInitialize = false; + } + } + catch(const css::uno::Exception&) {} + + // look if initialization is necessary + css::uno::Reference< css::lang::XInitialization > xInit( xHandler, css::uno::UNO_QUERY ); + if (xInit.is() && bInitialize) + { + css::uno::Reference< css::frame::XFrame > xOwner( m_xFrame.get(), css::uno::UNO_QUERY ); + SAL_WARN_IF(!xOwner.is(), "fwk", "DispatchProvider::implts_searchProtocolHandler(): Couldn't get reference to my owner frame. So I can't set may needed context information for this protocol handler."); + if (xOwner.is()) + { + try + { + // but do it only, if all context information is OK + css::uno::Sequence< css::uno::Any > lContext{ css::uno::Any(xOwner) }; + xInit->initialize(lContext); + } + catch(const css::uno::Exception&) {} + } + } + } + + // ask for his (sub)dispatcher for the given URL + if (xHandler.is()) + xDispatcher = xHandler->queryDispatch(aURL,SPECIALTARGET_SELF,0); + } + + return xDispatcher; +} + +/** + @short get or create new dispatch helper + @descr Sometimes we need some helper implementations to support dispatching of special URLs or commands. + But it's not a good idea to hold these services for the whole life time of this provider instance. + We should create it on demand... + That's why we implement this method. It return an already existing helper or create a new one otherwise. + + @attention The parameter sTarget and nSearchFlags are defaulted to "" and 0! + Mostly it depends from the parameter eHelper is they are required or not. + + @param eHelper + specify the requested dispatch helper + @param xOwner + the target of possible dispatch() call on created dispatch helper + @param sTarget + the target parameter of the original queryDispatch() request + @param nSearchFlags + the flags parameter of the original queryDispatch() request + @return A reference to a dispatch helper. + + @threadsafe yes +*/ +css::uno::Reference< css::frame::XDispatch > DispatchProvider::implts_getOrCreateDispatchHelper( EDispatchHelper eHelper , + const css::uno::Reference< css::frame::XFrame >& xOwner , + const OUString& sTarget , + sal_Int32 nSearchFlags) +{ + css::uno::Reference< css::frame::XDispatch > xDispatchHelper; + + switch (eHelper) + { + case E_CREATEDISPATCHER : + xDispatchHelper = new LoadDispatcher(m_xContext, xOwner, sTarget, nSearchFlags); + break; + + case E_BLANKDISPATCHER : + { + if (xOwner.is()) + xDispatchHelper = new LoadDispatcher(m_xContext, xOwner, SPECIALTARGET_BLANK, 0); + } + break; + + case E_DEFAULTDISPATCHER : + { + if (xOwner.is()) + xDispatchHelper = new LoadDispatcher(m_xContext, xOwner, SPECIALTARGET_DEFAULT, 0); + } + break; + + case E_SELFDISPATCHER : + xDispatchHelper = new LoadDispatcher(m_xContext, xOwner, SPECIALTARGET_SELF, 0); + break; + + case E_CLOSEDISPATCHER : + xDispatchHelper = new CloseDispatcher( m_xContext, xOwner, sTarget ); + break; + + case E_STARTMODULEDISPATCHER : + xDispatchHelper = new StartModuleDispatcher( m_xContext ); + break; + } + + return xDispatchHelper; +} + +/** + @short check URL for support by our used loader or handler + @descr If we must return our own dispatch helper implementations (self, blank, create dispatcher!) + we should be sure, that URL describe any loadable content. Otherwise slot/uno URLs + will be detected... but there exist nothing for real loading into a target frame! + + @param aURL + URL which should be "detected" + @return <TRUE/> if somewhere could handle that - <FALSE/> otherwise. + + @threadsafe yes +*/ +bool DispatchProvider::implts_isLoadableContent( const css::util::URL& aURL ) +{ + LoadEnv::EContentType eType = LoadEnv::classifyContent(aURL.Complete, css::uno::Sequence< css::beans::PropertyValue >()); + return ( eType == LoadEnv::E_CAN_BE_LOADED ); +} + +} // namespace framework + +/* vim:set shiftwidth=4 softtabstop=4 expandtab: */ |