131 lines
4 KiB
C++
131 lines
4 KiB
C++
/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
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/*
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* This file is part of the LibreOffice project.
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*
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* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/.
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*
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* This file incorporates work covered by the following license notice:
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*
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* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed
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* with this work for additional information regarding copyright
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* ownership. The ASF licenses this file to you under the Apache
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* License, Version 2.0 (the "License"); you may not use this file
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* except in compliance with the License. You may obtain a copy of
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* the License at http://www.apache.org/licenses/LICENSE-2.0 .
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*/
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#include "CanvasUpdateRequester.hxx"
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#include <vcl/svapp.hxx>
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#include <com/sun/star/lang/XComponent.hpp>
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#include <com/sun/star/rendering/XSpriteCanvas.hpp>
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#include <cppuhelper/weakref.hxx>
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#include <vector>
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using namespace ::com::sun::star;
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using namespace ::com::sun::star::uno;
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namespace sd::presenter {
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//===== CanvasUpdateRequester::Deleter ========================================
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class CanvasUpdateRequester::Deleter
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{
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public:
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void operator() (CanvasUpdateRequester* pObject) { delete pObject; }
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};
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//===== CanvasUpdateRequester =================================================
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std::shared_ptr<CanvasUpdateRequester> CanvasUpdateRequester::Instance (
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const Reference<rendering::XSpriteCanvas>& rxSharedCanvas)
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{
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// this global must not own anything or we crash on shutdown
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static std::vector<std::pair<
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uno::WeakReference<rendering::XSpriteCanvas>,
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std::weak_ptr<CanvasUpdateRequester>>> s_RequesterMap;
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for (auto it = s_RequesterMap.begin(); it != s_RequesterMap.end(); )
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{
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uno::Reference<rendering::XSpriteCanvas> const xCanvas(it->first);
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if (!xCanvas.is())
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{
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it = s_RequesterMap.erase(it); // remove stale entry
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}
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else if (xCanvas == rxSharedCanvas)
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{
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std::shared_ptr<CanvasUpdateRequester> pRequester(it->second);
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if (pRequester)
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{
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return pRequester;
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}
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else
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{
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std::shared_ptr<CanvasUpdateRequester> const pNew(
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new CanvasUpdateRequester(rxSharedCanvas), Deleter());
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it->second = pNew;
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return pNew;
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}
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}
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else
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{
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++it;
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}
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}
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// No requester for the given canvas found. Create a new one.
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std::shared_ptr<CanvasUpdateRequester> pRequester (
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new CanvasUpdateRequester(rxSharedCanvas), Deleter());
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s_RequesterMap.emplace_back(rxSharedCanvas, pRequester);
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return pRequester;
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}
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CanvasUpdateRequester::CanvasUpdateRequester (
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const Reference<rendering::XSpriteCanvas>& rxCanvas)
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: mxCanvas(rxCanvas)
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, m_pUserEventId(nullptr)
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, mbUpdateFlag(false)
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{
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Reference<lang::XComponent> xComponent (mxCanvas, UNO_QUERY);
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if (xComponent.is())
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{
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//xComponent->addEventListener(this);
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}
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}
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CanvasUpdateRequester::~CanvasUpdateRequester()
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{
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assert(m_pUserEventId == nullptr);
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}
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void CanvasUpdateRequester::RequestUpdate (const bool bUpdateAll)
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{
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if (m_pUserEventId == nullptr)
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{
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m_pThis = shared_from_this(); // keep instance alive until dispatch
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mbUpdateFlag = bUpdateAll;
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m_pUserEventId = Application::PostUserEvent(LINK(this, CanvasUpdateRequester, Callback));
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}
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else
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{
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mbUpdateFlag |= bUpdateAll;
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}
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}
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IMPL_LINK_NOARG(CanvasUpdateRequester, Callback, void*, void)
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{
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m_pUserEventId = nullptr;
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if (mxCanvas.is())
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{
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mxCanvas->updateScreen(mbUpdateFlag);
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mbUpdateFlag = false;
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}
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assert(m_pThis);
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m_pThis.reset(); // possibly delete "this"
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}
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} // end of namespace ::sd::presenter
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/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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