1 files changed, 175 insertions, 0 deletions
diff --git a/xmloff/source/core/xmlmultiimagehelper.cxx b/xmloff/source/core/xmlmultiimagehelper.cxx
new file mode 100644
index 000000000..000c6151e
--- /dev/null
+++ b/xmloff/source/core/xmlmultiimagehelper.cxx
@@ -0,0 +1,175 @@
+/* -*- 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 <rtl/ustring.hxx>
+#include <xmlmultiimagehelper.hxx>
+#include <o3tl/string_view.hxx>
+#include <comphelper/graphicmimetype.hxx>
+
+using namespace ::com::sun::star;
+
+namespace
+{
+    OUString getMimeTypeForURL(std::u16string_view rString)
+    {
+        OUString sMimeType;
+        if (o3tl::starts_with(rString, u"vnd.sun.star.Package"))
+        {
+            OString aExtension = OUStringToOString(rString.substr(rString.rfind('.') + 1), RTL_TEXTENCODING_ASCII_US);
+            sMimeType = comphelper::GraphicMimeTypeHelper::GetMimeTypeForExtension(aExtension);
+        }
+        return sMimeType;
+    }
+
+    sal_uInt32 getQualityIndex(std::u16string_view rMimeType)
+    {
+        // pixel formats first
+        if (rMimeType == u"image/bmp")
+        {
+            return 10;
+        }
+        if (rMimeType == u"image/gif")
+        {
+            return 20;
+        }
+        if (rMimeType == u"image/jpeg")
+        {
+            return 30;
+        }
+        if (rMimeType == u"image/png")
+        {
+            return 40;
+        }
+
+        // vector formats, prefer always
+        if (rMimeType == u"image/x-vclgraphic") // MIMETYPE_VCLGRAPHIC
+        {
+            return 990;
+        }
+        if (rMimeType == u"image/x-svm")
+        {
+            return 1000;
+        }
+        if (rMimeType == u"image/x-wmf")
+        {
+            return 1010;
+        }
+        if (rMimeType == u"image/x-emf")
+        {
+            return 1020;
+        }
+        if (rMimeType == u"image/x-eps")
+        {
+            return 1025;
+        }
+        if (rMimeType == u"application/pdf")
+        {
+            return 1030;
+        }
+        if (rMimeType == u"image/svg+xml")
+        {
+            return 1040;
+        }
+
+        return 0;
+    }
+}
+
+MultiImageImportHelper::MultiImageImportHelper()
+:   mbSupportsMultipleContents(false)
+{
+}
+
+MultiImageImportHelper::~MultiImageImportHelper()
+{
+}
+
+SvXMLImportContextRef MultiImageImportHelper::solveMultipleImages()
+{
+    SvXMLImportContextRef pContext;
+    if(maImplContextVector.size() > 1)
+    {
+        // multiple child contexts were imported, decide which is the most valuable one
+        // and remove the rest
+        std::vector<SvXMLImportContextRef>::size_type nIndexOfPreferred(maImplContextVector.size());
+        sal_uInt32 nBestQuality(0);
+
+        for(std::vector<SvXMLImportContextRef>::size_type a = 0; a < maImplContextVector.size(); a++)
+        {
+            const SvXMLImportContext& rContext = *maImplContextVector[a];
+
+
+            OUString sMimeType;
+
+            const OUString aStreamURL(getGraphicPackageURLFromImportContext(rContext));
+            if (!aStreamURL.isEmpty())
+            {
+                sMimeType = getMimeTypeForURL(aStreamURL);
+            }
+            else
+            {
+                uno::Reference<graphic::XGraphic> xGraphic(getGraphicFromImportContext(rContext));
+                if (xGraphic.is())
+                    sMimeType = comphelper::GraphicMimeTypeHelper::GetMimeTypeForXGraphic(xGraphic);
+            }
+
+            sal_uInt32 nNewQuality = getQualityIndex(sMimeType);
+            if (nNewQuality > nBestQuality)
+            {
+                nBestQuality = nNewQuality;
+                nIndexOfPreferred = a;
+            }
+        }
+
+        // correct if needed, default is to use the last entry
+        if(nIndexOfPreferred >= maImplContextVector.size())
+        {
+            nIndexOfPreferred = maImplContextVector.size() - 1;
+        }
+
+        // Take out the most valuable one
+        const std::vector< SvXMLImportContextRef >::iterator aRemove(maImplContextVector.begin() + nIndexOfPreferred);
+        pContext = *aRemove;
+        maImplContextVector.erase(aRemove);
+
+        // remove the rest from parent
+        for(std::vector<SvXMLImportContextRef>::size_type a = 0; a < maImplContextVector.size(); a++)
+        {
+            SvXMLImportContext& rCandidate = *maImplContextVector[a];
+
+            removeGraphicFromImportContext(rCandidate);
+        }
+        // re-insert it so that solveMultipleImages is idempotent
+        maImplContextVector.clear();
+        maImplContextVector.push_back(pContext);
+    }
+    else if (maImplContextVector.size() == 1)
+    {
+        pContext = maImplContextVector.front();
+    }
+
+    return pContext;
+}
+
+void MultiImageImportHelper::addContent(const SvXMLImportContext& rSvXMLImportContext)
+{
+    maImplContextVector.emplace_back(const_cast< SvXMLImportContext* >(&rSvXMLImportContext));
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */