1 files changed, 360 insertions, 0 deletions
diff --git a/sd/source/ui/presenter/PresenterPreviewCache.cxx b/sd/source/ui/presenter/PresenterPreviewCache.cxx
new file mode 100644
index 000000000..fd29cdbfa
--- /dev/null
+++ b/sd/source/ui/presenter/PresenterPreviewCache.cxx
@@ -0,0 +1,360 @@
+/* -*- 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 "PresenterPreviewCache.hxx"
+
+#include <cache/SlsPageCache.hxx>
+#include <cache/SlsCacheContext.hxx>
+#include <vcl/bitmapex.hxx>
+#include <sdpage.hxx>
+#include <cppcanvas/vclfactory.hxx>
+#include <com/sun/star/drawing/XDrawPage.hpp>
+#include <osl/diagnose.h>
+
+namespace com::sun::star::uno { class XComponentContext; }
+
+using namespace ::com::sun::star;
+using namespace ::com::sun::star::uno;
+using namespace ::sd::slidesorter::cache;
+
+namespace sd::presenter {
+
+class PresenterPreviewCache::PresenterCacheContext : public CacheContext
+{
+public:
+    PresenterCacheContext();
+
+    void SetDocumentSlides (
+        const Reference<container::XIndexAccess>& rxSlides,
+        const Reference<XInterface>& rxDocument);
+    void SetVisibleSlideRange (
+        const sal_Int32 nFirstVisibleSlideIndex,
+        const sal_Int32 nLastVisibleSlideIndex);
+    const SdrPage* GetPage (const sal_Int32 nSlideIndex) const;
+    void AddPreviewCreationNotifyListener (const Reference<drawing::XSlidePreviewCacheListener>& rxListener);
+    void RemovePreviewCreationNotifyListener (const Reference<drawing::XSlidePreviewCacheListener>& rxListener);
+
+    // CacheContext
+    virtual void NotifyPreviewCreation (CacheKey aKey) override;
+    virtual bool IsIdle() override;
+    virtual bool IsVisible (CacheKey aKey) override;
+    virtual const SdrPage* GetPage (CacheKey aKey) override;
+    virtual std::shared_ptr<std::vector<CacheKey> > GetEntryList (bool bVisible) override;
+    virtual sal_Int32 GetPriority (CacheKey aKey) override;
+    virtual css::uno::Reference<css::uno::XInterface> GetModel() override;
+
+private:
+    Reference<container::XIndexAccess> mxSlides;
+    Reference<XInterface> mxDocument;
+    sal_Int32 mnFirstVisibleSlideIndex;
+    sal_Int32 mnLastVisibleSlideIndex;
+    typedef ::std::vector<css::uno::Reference<css::drawing::XSlidePreviewCacheListener> > ListenerContainer;
+    ListenerContainer maListeners;
+
+    void CallListeners (const sal_Int32 nSlideIndex);
+};
+
+//===== PresenterPreviewCache =================================================
+
+PresenterPreviewCache::PresenterPreviewCache ()
+    : maPreviewSize(Size(200,200)),
+      mpCacheContext(std::make_shared<PresenterCacheContext>()),
+      mpCache(std::make_shared<PageCache>(maPreviewSize, Bitmap::HasFastScale(), mpCacheContext))
+{
+}
+
+PresenterPreviewCache::~PresenterPreviewCache()
+{
+}
+
+//----- XInitialize -----------------------------------------------------------
+
+void SAL_CALL PresenterPreviewCache::initialize (const Sequence<Any>& rArguments)
+{
+    if (rArguments.hasElements())
+        throw RuntimeException();
+}
+
+//----- XSlidePreviewCache ----------------------------------------------------
+
+void SAL_CALL PresenterPreviewCache::setDocumentSlides (
+    const Reference<container::XIndexAccess>& rxSlides,
+    const Reference<XInterface>& rxDocument)
+{
+    ThrowIfDisposed();
+    OSL_ASSERT(mpCacheContext != nullptr);
+
+    mpCacheContext->SetDocumentSlides(rxSlides, rxDocument);
+}
+
+void SAL_CALL PresenterPreviewCache::setVisibleRange (
+    sal_Int32 nFirstVisibleSlideIndex,
+    sal_Int32 nLastVisibleSlideIndex)
+{
+    ThrowIfDisposed();
+    OSL_ASSERT(mpCacheContext != nullptr);
+
+    mpCacheContext->SetVisibleSlideRange (nFirstVisibleSlideIndex, nLastVisibleSlideIndex);
+}
+
+void SAL_CALL PresenterPreviewCache::setPreviewSize (
+    const css::geometry::IntegerSize2D& rSize)
+{
+    ThrowIfDisposed();
+    OSL_ASSERT(mpCache != nullptr);
+
+    maPreviewSize = Size(rSize.Width, rSize.Height);
+    mpCache->ChangeSize(maPreviewSize, Bitmap::HasFastScale());
+}
+
+Reference<rendering::XBitmap> SAL_CALL PresenterPreviewCache::getSlidePreview (
+    sal_Int32 nSlideIndex,
+    const Reference<rendering::XCanvas>& rxCanvas)
+{
+    ThrowIfDisposed();
+    OSL_ASSERT(mpCacheContext != nullptr);
+
+    cppcanvas::CanvasSharedPtr pCanvas (
+        cppcanvas::VCLFactory::createCanvas(rxCanvas));
+
+    const SdrPage* pPage = mpCacheContext->GetPage(nSlideIndex);
+    if (pPage == nullptr)
+        throw RuntimeException();
+
+    const BitmapEx aPreview (mpCache->GetPreviewBitmap(pPage,true));
+    if (aPreview.IsEmpty())
+        return nullptr;
+    else
+        return cppcanvas::VCLFactory::createBitmap(
+            pCanvas,
+            aPreview)->getUNOBitmap();
+}
+
+void SAL_CALL PresenterPreviewCache::addPreviewCreationNotifyListener (
+    const Reference<drawing::XSlidePreviewCacheListener>& rxListener)
+{
+    if (m_bDisposed)
+        return;
+    if (rxListener.is())
+        mpCacheContext->AddPreviewCreationNotifyListener(rxListener);
+}
+
+void SAL_CALL PresenterPreviewCache::removePreviewCreationNotifyListener (
+    const css::uno::Reference<css::drawing::XSlidePreviewCacheListener>& rxListener)
+{
+    ThrowIfDisposed();
+    mpCacheContext->RemovePreviewCreationNotifyListener(rxListener);
+}
+
+void SAL_CALL PresenterPreviewCache::pause()
+{
+    ThrowIfDisposed();
+    OSL_ASSERT(mpCache != nullptr);
+    mpCache->Pause();
+}
+
+void SAL_CALL PresenterPreviewCache::resume()
+{
+    ThrowIfDisposed();
+    OSL_ASSERT(mpCache != nullptr);
+    mpCache->Resume();
+}
+
+void PresenterPreviewCache::ThrowIfDisposed()
+{
+    if (m_bDisposed)
+    {
+        throw lang::DisposedException ("PresenterPreviewCache object has already been disposed",
+            static_cast<uno::XWeak*>(this));
+    }
+}
+
+//===== PresenterPreviewCache::PresenterCacheContext ==========================
+
+PresenterPreviewCache::PresenterCacheContext::PresenterCacheContext()
+    : mnFirstVisibleSlideIndex(-1),
+      mnLastVisibleSlideIndex(-1)
+{
+}
+
+void PresenterPreviewCache::PresenterCacheContext::SetDocumentSlides (
+    const Reference<container::XIndexAccess>& rxSlides,
+    const Reference<XInterface>& rxDocument)
+{
+    mxSlides = rxSlides;
+    mxDocument = rxDocument;
+    mnFirstVisibleSlideIndex = -1;
+    mnLastVisibleSlideIndex = -1;
+}
+
+void PresenterPreviewCache::PresenterCacheContext::SetVisibleSlideRange (
+    const sal_Int32 nFirstVisibleSlideIndex,
+    const sal_Int32 nLastVisibleSlideIndex)
+{
+    if (nFirstVisibleSlideIndex > nLastVisibleSlideIndex || nFirstVisibleSlideIndex<0)
+    {
+        mnFirstVisibleSlideIndex = -1;
+        mnLastVisibleSlideIndex = -1;
+    }
+    else
+    {
+        mnFirstVisibleSlideIndex = nFirstVisibleSlideIndex;
+        mnLastVisibleSlideIndex = nLastVisibleSlideIndex;
+    }
+    if (mxSlides.is() && mnLastVisibleSlideIndex >= mxSlides->getCount())
+        mnLastVisibleSlideIndex = mxSlides->getCount() - 1;
+}
+
+void PresenterPreviewCache::PresenterCacheContext::AddPreviewCreationNotifyListener (
+    const Reference<drawing::XSlidePreviewCacheListener>& rxListener)
+{
+    maListeners.push_back(rxListener);
+}
+
+void PresenterPreviewCache::PresenterCacheContext::RemovePreviewCreationNotifyListener (
+    const Reference<drawing::XSlidePreviewCacheListener>& rxListener)
+{
+    auto iListener = std::find(maListeners.begin(), maListeners.end(), rxListener);
+    if (iListener != maListeners.end())
+        maListeners.erase(iListener);
+}
+
+//----- CacheContext ----------------------------------------------------------
+
+void PresenterPreviewCache::PresenterCacheContext::NotifyPreviewCreation (
+    CacheKey aKey)
+{
+    if ( ! mxSlides.is())
+        return;
+    const sal_Int32 nCount(mxSlides->getCount());
+    for (sal_Int32 nIndex=0; nIndex<nCount; ++nIndex)
+        if (aKey == GetPage(nIndex))
+            CallListeners(nIndex);
+}
+
+bool PresenterPreviewCache::PresenterCacheContext::IsIdle()
+{
+    return true;
+}
+
+bool PresenterPreviewCache::PresenterCacheContext::IsVisible (CacheKey aKey)
+{
+    if (mnFirstVisibleSlideIndex < 0)
+        return false;
+    for (sal_Int32 nIndex=mnFirstVisibleSlideIndex; nIndex<=mnLastVisibleSlideIndex; ++nIndex)
+    {
+        const SdrPage* pPage = GetPage(nIndex);
+        if (pPage == aKey)
+            return true;
+    }
+    return false;
+}
+
+const SdrPage* PresenterPreviewCache::PresenterCacheContext::GetPage (CacheKey aKey)
+{
+    return aKey;
+}
+
+std::shared_ptr<std::vector<CacheKey> >
+    PresenterPreviewCache::PresenterCacheContext::GetEntryList (bool bVisible)
+{
+    auto pKeys = std::make_shared<std::vector<CacheKey>>();
+
+    if ( ! mxSlides.is())
+        return pKeys;
+
+    const sal_Int32 nFirstIndex (bVisible ? mnFirstVisibleSlideIndex : 0);
+    const sal_Int32 nLastIndex (bVisible ? mnLastVisibleSlideIndex : mxSlides->getCount()-1);
+
+    if (nFirstIndex < 0)
+        return pKeys;
+
+    for (sal_Int32 nIndex=nFirstIndex; nIndex<=nLastIndex; ++nIndex)
+    {
+        pKeys->push_back(GetPage(nIndex));
+    }
+
+    return pKeys;
+}
+
+sal_Int32 PresenterPreviewCache::PresenterCacheContext::GetPriority (CacheKey aKey)
+{
+    if ( ! mxSlides.is())
+        return 0;
+
+    const sal_Int32 nCount (mxSlides->getCount());
+
+    for (sal_Int32 nIndex=mnFirstVisibleSlideIndex; nIndex<=mnLastVisibleSlideIndex; ++nIndex)
+        if (aKey == GetPage(nIndex))
+            return -nCount-1+nIndex;
+
+    for (sal_Int32 nIndex=0; nIndex<=nCount; ++nIndex)
+        if (aKey == GetPage(nIndex))
+            return nIndex;
+
+    return 0;
+}
+
+Reference<XInterface> PresenterPreviewCache::PresenterCacheContext::GetModel()
+{
+    return mxDocument;
+}
+
+const SdrPage* PresenterPreviewCache::PresenterCacheContext::GetPage (
+    const sal_Int32 nSlideIndex) const
+{
+    if ( ! mxSlides.is())
+        return nullptr;
+    if (nSlideIndex < 0 || nSlideIndex >= mxSlides->getCount())
+        return nullptr;
+
+    Reference<drawing::XDrawPage> xSlide (mxSlides->getByIndex(nSlideIndex), UNO_QUERY);
+    const SdPage* pPage = SdPage::getImplementation(xSlide);
+    return pPage;
+}
+
+void PresenterPreviewCache::PresenterCacheContext::CallListeners (
+    const sal_Int32 nIndex)
+{
+    ListenerContainer aListeners (maListeners);
+    for (const auto& rxListener : aListeners)
+    {
+        try
+        {
+            rxListener->notifyPreviewCreation(nIndex);
+        }
+        catch (lang::DisposedException&)
+        {
+            RemovePreviewCreationNotifyListener(rxListener);
+        }
+    }
+}
+
+} // end of namespace ::sd::presenter
+
+
+extern "C" SAL_DLLPUBLIC_EXPORT css::uno::XInterface*
+com_sun_star_comp_Draw_PresenterPreviewCache_get_implementation(css::uno::XComponentContext*,
+                                                                css::uno::Sequence<css::uno::Any> const &)
+{
+    return cppu::acquire(new sd::presenter::PresenterPreviewCache);
+}
+
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */