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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 09:06:44 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 09:06:44 +0000
commited5640d8b587fbcfed7dd7967f3de04b37a76f26 (patch)
tree7a5f7c6c9d02226d7471cb3cc8fbbf631b415303 /include/comphelper/interfacecontainer3.hxx
parentInitial commit. (diff)
downloadlibreoffice-ed5640d8b587fbcfed7dd7967f3de04b37a76f26.tar.xz
libreoffice-ed5640d8b587fbcfed7dd7967f3de04b37a76f26.zip
Adding upstream version 4:7.4.7.upstream/4%7.4.7upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
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+/* -*- 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 .
+ */
+#pragma once
+
+#include <sal/config.h>
+
+#include <com/sun/star/lang/EventObject.hpp>
+#include <com/sun/star/lang/DisposedException.hpp>
+#include <o3tl/cow_wrapper.hxx>
+#include <vector>
+
+namespace com::sun::star::uno
+{
+class XInterface;
+}
+namespace osl
+{
+class Mutex;
+}
+
+namespace comphelper
+{
+template <class ListenerT> class OInterfaceContainerHelper3;
+/**
+ This is the iterator of an OInterfaceContainerHelper3. Typically
+ one constructs an instance on the stack for one firing session.
+ It is not allowed to assign or copy an instance of this class.
+
+ @tparam ListenerT UNO event listener type
+ @see OInterfaceContainerHelper3
+ */
+template <class ListenerT> class OInterfaceIteratorHelper3
+{
+public:
+ /**
+ Create an iterator over the elements of the container. The iterator
+ copies the elements of the container. A change to the container
+ during the lifetime of an iterator is allowed and does not
+ affect the iterator-instance. The iterator and the container take cares
+ themself for concurrent access, no additional guarding is necessary.
+
+ Remark: The copy is on demand. The iterator copy the elements only if the container
+ change the contents...
+
+ @param rCont the container of the elements.
+ */
+ OInterfaceIteratorHelper3(OInterfaceContainerHelper3<ListenerT>& rCont_)
+ : rCont(rCont_)
+ , maData(rCont.maData)
+ , nRemain(maData->size())
+ {
+ }
+
+ /** Return true, if there are more elements in the iterator. */
+ bool hasMoreElements() const { return nRemain != 0; }
+ /** Return the next element of the iterator. Calling this method if
+ hasMoreElements() has returned false, is an error.
+ */
+ css::uno::Reference<ListenerT> const& next();
+
+ /** Removes the current element (the last one returned by next())
+ from the underlying container. Calling this method before
+ next() has been called or calling it twice with no next()
+ in between is an error.
+ */
+ void remove();
+
+private:
+ OInterfaceContainerHelper3<ListenerT>& rCont;
+ o3tl::cow_wrapper<std::vector<css::uno::Reference<ListenerT>>,
+ o3tl::ThreadSafeRefCountingPolicy>
+ maData;
+ sal_Int32 nRemain;
+
+ OInterfaceIteratorHelper3(const OInterfaceIteratorHelper3&) = delete;
+ OInterfaceIteratorHelper3& operator=(const OInterfaceIteratorHelper3&) = delete;
+};
+
+template <class ListenerT>
+const css::uno::Reference<ListenerT>& OInterfaceIteratorHelper3<ListenerT>::next()
+{
+ nRemain--;
+ return (*maData)[nRemain];
+}
+
+template <class ListenerT> void OInterfaceIteratorHelper3<ListenerT>::remove()
+{
+ rCont.removeInterface((*maData)[nRemain]);
+}
+
+/**
+ A container of interfaces. To access the elements use an iterator.
+ This implementation is thread-safe.
+
+ This is a copy of the code at include/comphelper/interfacecontainer2.hxx,
+ except that it is templatized on the type of the listener, which allows
+ some parts of the code to avoid doing an UNO_QUERY that can be expensive
+ in bulk.
+
+ @tparam ListenerT UNO event listener type
+ @see OInterfaceIteratorHelper
+ */
+template <class ListenerT> class OInterfaceContainerHelper3
+{
+public:
+ /**
+ Create an interface container.
+
+ @param rMutex the mutex to protect multi thread access.
+ The lifetime must be longer than the lifetime
+ of this object.
+ */
+ inline OInterfaceContainerHelper3(::osl::Mutex& rMutex_);
+
+ /**
+ Return the number of Elements in the container. Only useful if you have acquired
+ the mutex.
+ */
+ sal_Int32 getLength() const;
+
+ /**
+ Return all interfaces added to this container.
+ **/
+ std::vector<css::uno::Reference<ListenerT>> getElements() const;
+
+ /** Inserts an element into the container. The position is not specified, thus it is not
+ specified in which order events are fired.
+
+ @attention
+ If you add the same interface more than once, then it will be added to the elements list
+ more than once and thus if you want to remove that interface from the list, you have to call
+ removeInterface() the same number of times.
+ In the latter case, you will also get events fired more than once (if the interface is a
+ listener interface).
+
+ @param rxIFace
+ interface to be added; it is allowed to insert
+ the same interface more than once
+ @return
+ the new count of elements in the container
+ */
+ sal_Int32 addInterface(const css::uno::Reference<ListenerT>& rxIFace);
+ /** Removes an element from the container. It uses interface equality to remove the interface.
+
+ @param rxIFace
+ interface to be removed
+ @return
+ the new count of elements in the container
+ */
+ sal_Int32 removeInterface(const css::uno::Reference<ListenerT>& rxIFace);
+ /** Return an interface by index
+ */
+ const css::uno::Reference<ListenerT>& getInterface(sal_Int32 nIndex) const;
+ /**
+ Call disposing on all object in the container that
+ support XEventListener. Then clear the container.
+ */
+ void disposeAndClear(const css::lang::EventObject& rEvt);
+ /**
+ Clears the container without calling disposing().
+ */
+ void clear();
+
+ /** Executes a functor for each contained listener of specified type, e.g.
+ <code>forEach<awt::XPaintListener>(...</code>.
+
+ If a css::lang::DisposedException occurs which relates to
+ the called listener, then that listener is removed from the container.
+
+ @tparam FuncT unary functor type, let your compiler deduce this for you
+ @param func unary functor object expecting an argument of type
+ css::uno::Reference<ListenerT>
+ */
+ template <typename FuncT> inline void forEach(FuncT const& func);
+
+ /** Calls a UNO listener method for each contained listener.
+
+ The listener method must take a single argument of type EventT,
+ and return <code>void</code>.
+
+ If a css::lang::DisposedException occurs which relates to
+ the called listener, then that listener is removed from the container.
+
+ @tparam EventT event type, let your compiler deduce this for you
+ @param NotificationMethod
+ Pointer to a method of a ListenerT interface.
+ @param Event
+ Event to notify to all contained listeners
+
+ Example:
+@code
+ awt::PaintEvent aEvent( static_cast< cppu::OWeakObject* >( this ), ... );
+ listeners.notifyEach( &XPaintListener::windowPaint, aEvent );
+@endcode
+ */
+ template <typename EventT>
+ inline void notifyEach(void (SAL_CALL ListenerT::*NotificationMethod)(const EventT&),
+ const EventT& Event);
+
+private:
+ friend class OInterfaceIteratorHelper3<ListenerT>;
+ o3tl::cow_wrapper<std::vector<css::uno::Reference<ListenerT>>,
+ o3tl::ThreadSafeRefCountingPolicy>
+ maData;
+ ::osl::Mutex& mrMutex;
+ OInterfaceContainerHelper3(const OInterfaceContainerHelper3&) = delete;
+ OInterfaceContainerHelper3& operator=(const OInterfaceContainerHelper3&) = delete;
+
+ static o3tl::cow_wrapper<std::vector<css::uno::Reference<ListenerT>>,
+ o3tl::ThreadSafeRefCountingPolicy>&
+ DEFAULT()
+ {
+ static o3tl::cow_wrapper<std::vector<css::uno::Reference<ListenerT>>,
+ o3tl::ThreadSafeRefCountingPolicy>
+ SINGLETON;
+ return SINGLETON;
+ }
+
+private:
+ template <typename EventT> class NotifySingleListener
+ {
+ private:
+ typedef void (SAL_CALL ListenerT::*NotificationMethod)(const EventT&);
+ NotificationMethod const m_pMethod;
+ const EventT& m_rEvent;
+
+ public:
+ NotifySingleListener(NotificationMethod method, const EventT& event)
+ : m_pMethod(method)
+ , m_rEvent(event)
+ {
+ }
+
+ void operator()(const css::uno::Reference<ListenerT>& listener) const
+ {
+ (listener.get()->*m_pMethod)(m_rEvent);
+ }
+ };
+};
+
+template <class T>
+inline OInterfaceContainerHelper3<T>::OInterfaceContainerHelper3(::osl::Mutex& rMutex_)
+ : maData(OInterfaceContainerHelper3<T>::DEFAULT())
+ , mrMutex(rMutex_)
+{
+}
+
+template <class T>
+template <typename FuncT>
+inline void OInterfaceContainerHelper3<T>::forEach(FuncT const& func)
+{
+ OInterfaceIteratorHelper3<T> iter(*this);
+ while (iter.hasMoreElements())
+ {
+ auto xListener = iter.next();
+ try
+ {
+ func(xListener);
+ }
+ catch (css::lang::DisposedException const& exc)
+ {
+ if (exc.Context == xListener)
+ iter.remove();
+ }
+ }
+}
+
+template <class ListenerT>
+template <typename EventT>
+inline void OInterfaceContainerHelper3<ListenerT>::notifyEach(
+ void (SAL_CALL ListenerT::*NotificationMethod)(const EventT&), const EventT& Event)
+{
+ forEach<NotifySingleListener<EventT>>(NotifySingleListener<EventT>(NotificationMethod, Event));
+}
+
+template <class ListenerT> sal_Int32 OInterfaceContainerHelper3<ListenerT>::getLength() const
+{
+ osl::MutexGuard aGuard(mrMutex);
+ return maData->size();
+}
+
+template <class ListenerT>
+std::vector<css::uno::Reference<ListenerT>>
+OInterfaceContainerHelper3<ListenerT>::getElements() const
+{
+ std::vector<css::uno::Reference<ListenerT>> rVec;
+ osl::MutexGuard aGuard(mrMutex);
+ rVec = *maData;
+ return rVec;
+}
+
+template <class ListenerT>
+sal_Int32
+OInterfaceContainerHelper3<ListenerT>::addInterface(const css::uno::Reference<ListenerT>& rListener)
+{
+ assert(rListener.is());
+ osl::MutexGuard aGuard(mrMutex);
+
+ maData->push_back(rListener);
+ return maData->size();
+}
+
+template <class ListenerT>
+sal_Int32 OInterfaceContainerHelper3<ListenerT>::removeInterface(
+ const css::uno::Reference<ListenerT>& rListener)
+{
+ assert(rListener.is());
+ osl::MutexGuard aGuard(mrMutex);
+
+ // It is not valid to compare the pointer directly, but it's faster.
+ auto it = std::find_if(maData->begin(), maData->end(),
+ [&rListener](const css::uno::Reference<css::uno::XInterface>& rItem) {
+ return rItem.get() == rListener.get();
+ });
+
+ // interface not found, use the correct compare method
+ if (it == maData->end())
+ it = std::find(maData->begin(), maData->end(), rListener);
+
+ if (it != maData->end())
+ maData->erase(it);
+
+ return maData->size();
+}
+
+template <class ListenerT>
+const css::uno::Reference<ListenerT>&
+OInterfaceContainerHelper3<ListenerT>::getInterface(sal_Int32 nIndex) const
+{
+ osl::MutexGuard aGuard(mrMutex);
+
+ return (*maData)[nIndex];
+}
+
+template <class ListenerT>
+void OInterfaceContainerHelper3<ListenerT>::disposeAndClear(const css::lang::EventObject& rEvt)
+{
+ osl::ClearableMutexGuard aGuard(mrMutex);
+ OInterfaceIteratorHelper3<ListenerT> aIt(*this);
+ maData->clear();
+ aGuard.clear();
+ while (aIt.hasMoreElements())
+ {
+ try
+ {
+ aIt.next()->disposing(rEvt);
+ }
+ catch (css::uno::RuntimeException&)
+ {
+ // be robust, if e.g. a remote bridge has disposed already.
+ // there is no way to delegate the error to the caller :o(.
+ }
+ }
+}
+
+template <class ListenerT> void OInterfaceContainerHelper3<ListenerT>::clear()
+{
+ osl::MutexGuard aGuard(mrMutex);
+ maData->clear();
+}
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */