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diff --git a/sd/source/ui/sidebar/DocumentHelper.hxx b/sd/source/ui/sidebar/DocumentHelper.hxx
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+/**************************************************************
+ *
+ * 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
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ *
+ *************************************************************/
+
+#ifndef SD_SIDEBAR_PANELS_DCUMENT_HELPER_HXX
+#define SD_SIDEBAR_PANELS_DCUMENT_HELPER_HXX
+
+#include <tools/solar.h>
+#include <boost/shared_ptr.hpp>
+#include <vector>
+
+class SdDrawDocument;
+class SdPage;
+class String;
+
+namespace sd { namespace sidebar {
+
+/** A collection of methods supporting the handling of master pages.
+*/
+class DocumentHelper
+{
+public:
+    /** Return a copy of the given master page in the given document.
+    */
+    static SdPage* CopyMasterPageToLocalDocument (
+        SdDrawDocument& rTargetDocument,
+        SdPage* pMasterPage);
+
+    /** Return and, when not yet present, create a slide that uses the given
+        masster page.
+    */
+    static SdPage* GetSlideForMasterPage (SdPage* pMasterPage);
+
+    /** Copy the styles used by the given page from the source document to
+        the target document.
+    */
+    static void ProvideStyles (
+        SdDrawDocument& rSourceDocument,
+        SdDrawDocument& rTargetDocument,
+        SdPage* pPage);
+
+    /** Assign the given master page to the list of pages.
+        @param rTargetDocument
+            The document that is the owner of the pages in rPageList.
+        @param pMasterPage
+            This master page will usually be a member of the list of all
+            available master pages as provided by the MasterPageContainer.
+        @param rPageList
+            The pages to which to assign the master page.  These pages may
+            be slides or master pages themselves.
+    */
+    static void AssignMasterPageToPageList (
+        SdDrawDocument& rTargetDocument,
+        SdPage* pMasterPage,
+        const ::boost::shared_ptr<std::vector<SdPage*> >& rPageList);
+
+private:
+    static SdPage* AddMasterPage (
+        SdDrawDocument& rTargetDocument,
+        SdPage* pMasterPage);
+    static SdPage* AddMasterPage (
+        SdDrawDocument& rTargetDocument,
+        SdPage* pMasterPage,
+        sal_uInt16 nInsertionIndex);
+    static SdPage* ProvideMasterPage (
+        SdDrawDocument& rTargetDocument,
+        SdPage* pMasterPage,
+        const ::boost::shared_ptr<std::vector<SdPage*> >& rpPageList);
+
+    /** Assign the given master page to the given page.
+        @param pMasterPage
+            In contrast to AssignMasterPageToPageList() this page is assumed
+            to be in the target document, i.e. the same document that pPage
+            is in.  The caller will usually call AddMasterPage() to create a
+            clone of a master page in a another document to create it.
+        @param rsBaseLayoutName
+            The layout name of the given master page.  It is given so that
+            it has not to be created on every call.  It could be generated
+            from the given master page, though.
+        @param pPage
+            The page to which to assign the master page.  It can be a slide
+            or a master page itself.
+    */
+    static void AssignMasterPageToPage (
+        SdPage* pMasterPage,
+        const String& rsBaseLayoutName,
+        SdPage* pPage);
+};
+
+
+} } // end of namespace sd::sidebar
+
+#endif