Adding upstream version 4:7.4.7.upstream/4%7.4.7upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 290 insertions, 0 deletions

diff --git a/include/comphelper/interfacecontainer2.hxx b/include/comphelper/interfacecontainer2.hxx
new file mode 100644
index 000000000..3df7c71d4
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+++ b/include/comphelper/interfacecontainer2.hxx
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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 .
+ */
+#ifndef INCLUDED_COMPHELPER_INTERFACECONTAINER2_H
+#define INCLUDED_COMPHELPER_INTERFACECONTAINER2_H
+
+#include <sal/config.h>
+
+#include <vector>
+
+#include <com/sun/star/lang/EventObject.hpp>
+
+#include <com/sun/star/lang/DisposedException.hpp>
+#include <comphelper/comphelperdllapi.h>
+
+namespace com::sun::star::uno { class XInterface; }
+namespace osl { class Mutex; }
+
+namespace comphelper
+{
+
+namespace detail {
+
+    /**
+      This is here to optimise space in the common case that there are zero or one
+      listeners.
+    */
+    union element_alias2
+    {
+        std::vector< css::uno::Reference< css::uno::XInterface > > *pAsVector;
+        css::uno::XInterface * pAsInterface;
+        element_alias2() : pAsInterface(nullptr) {}
+    };
+
+}
+
+
+class OInterfaceContainerHelper2;
+/**
+  This is the iterator of an OInterfaceContainerHelper2. 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.
+
+  @see OInterfaceContainerHelper2
+ */
+class COMPHELPER_DLLPUBLIC OInterfaceIteratorHelper2
+{
+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. It is not allowed to destroy the container as long
+       as an iterator exist.
+
+       @param rCont the container of the elements.
+     */
+    OInterfaceIteratorHelper2( OInterfaceContainerHelper2 & rCont );
+
+    /**
+      Releases the connection to the container.
+     */
+    ~OInterfaceIteratorHelper2();
+
+    /** 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. Cast the
+        returned pointer to the
+     */
+    css::uno::XInterface * 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()
+        inbetween is an error.
+    */
+    void remove();
+
+private:
+    OInterfaceContainerHelper2 & rCont;
+    detail::element_alias2       aData;
+    sal_Int32                    nRemain;
+    bool                         bIsList;
+
+    OInterfaceIteratorHelper2( const OInterfaceIteratorHelper2 & ) = delete;
+    OInterfaceIteratorHelper2 &  operator = ( const OInterfaceIteratorHelper2 & ) = delete;
+};
+
+
+/**
+  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/cppuhelper/interfacecontainer.h,
+  Except that it uses a std::vector instead of a Sequence for the mutable listener
+  list, which provides far better performance.
+
+  @see OInterfaceIteratorHelper2
+ */
+class COMPHELPER_DLLPUBLIC OInterfaceContainerHelper2
+{
+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.
+     */
+    OInterfaceContainerHelper2( ::osl::Mutex & rMutex );
+    /**
+      Release all interfaces. All iterators must be destroyed before
+      the container is destructed.
+     */
+    ~OInterfaceContainerHelper2();
+    /**
+      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< css::uno::XInterface > > 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 null or
+               the same interface more than once
+        @return
+                the new count of elements in the container
+    */
+    sal_Int32 addInterface( const css::uno::Reference< css::uno::XInterface > & 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< css::uno::XInterface > & rxIFace );
+    /** Return an interface by index */
+    css::uno::Reference< css::uno::XInterface > 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 ListenerT listener type
+        @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 ListenerT, 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 ListenerT UNO event listener type, let your compiler deduce this for you
+        @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 ListenerT, typename EventT >
+    inline void notifyEach( void ( SAL_CALL ListenerT::*NotificationMethod )( const EventT& ), const EventT& Event );
+
+private:
+friend class OInterfaceIteratorHelper2;
+    /**
+      bIsList == TRUE -> aData.pAsVector of type vector< XInterfaceSequence >,
+      otherwise aData.pAsInterface == of type (XEventListener *)
+     */
+    detail::element_alias2  aData;
+    ::osl::Mutex &          rMutex;
+    /** TRUE -> used by an iterator. */
+    bool                    bInUse;
+    /** TRUE -> aData.pAsVector is of type Sequence< XInterfaceSequence >. */
+    bool                    bIsList;
+
+    OInterfaceContainerHelper2( const OInterfaceContainerHelper2 & ) = delete;
+    OInterfaceContainerHelper2 & operator = ( const OInterfaceContainerHelper2 & ) = delete;
+
+    /*
+      Duplicate content of the container and release the old one without destroying.
+      The mutex must be locked and the memberbInUse must be true.
+     */
+    void copyAndResetInUse();
+
+private:
+    template< typename ListenerT, 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 <typename ListenerT, typename FuncT>
+inline void OInterfaceContainerHelper2::forEach( FuncT const& func )
+{
+    OInterfaceIteratorHelper2 iter( *this );
+    while (iter.hasMoreElements()) {
+        css::uno::Reference<ListenerT> const xListener( iter.next(), css::uno::UNO_QUERY );
+        if (xListener.is()) {
+            try {
+                func( xListener );
+            }
+            catch (css::lang::DisposedException const& exc) {
+                if (exc.Context == xListener)
+                    iter.remove();
+            }
+        }
+    }
+}
+
+template< typename ListenerT, typename EventT >
+inline void OInterfaceContainerHelper2::notifyEach( void ( SAL_CALL ListenerT::*NotificationMethod )( const EventT& ), const EventT& Event )
+{
+    forEach< ListenerT, NotifySingleListener< ListenerT, EventT > >( NotifySingleListener< ListenerT, EventT >( NotificationMethod, Event ) );
+}
+
+}
+#endif
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */