Create the SfxRedactionHelper class

And move some code pieces, related to the redaction functionality,
from objserv.cxx to the new SfxRedactionHelper.cxx file.

Change-Id: I6491c9b581ea6d3a05a72117c5b72e1dc19025dc
Reviewed-on: https://gerrit.libreoffice.org/68338
Tested-by: Jenkins
Reviewed-by: Muhammet Kara <muhammet.kara@collabora.com>

4 files changed, 261 insertions, 136 deletions

diff --git a/sfx2/Library_sfx.mk b/sfx2/Library_sfx.mk
index aefc85202685..6b10dfa021ee 100644
--- a/sfx2/Library_sfx.mk
+++ b/sfx2/Library_sfx.mk
@@ -226,6 +226,7 @@ $(eval $(call gb_Library_add_exception_objects,sfx,\
     sfx2/source/doc/docundomanager \
     sfx2/source/doc/sfxbasemodel \
     sfx2/source/doc/sfxmodelfactory \
+    sfx2/source/doc/SfxRedactionHelper \
     sfx2/source/doc/syspath \
     sfx2/source/doc/zoomitem \
     sfx2/source/doc/templatedlg \
diff --git a/sfx2/inc/SfxRedactionHelper.hxx b/sfx2/inc/SfxRedactionHelper.hxx
new file mode 100644
index 000000000000..d338143c608e
--- /dev/null
+++ b/sfx2/inc/SfxRedactionHelper.hxx
@@ -0,0 +1,69 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4; fill-column: 100 -*- */
+/*
+ * 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/.
+ */
+
+#ifndef INCLUDED_CUI_SOURCE_INC_SFXREDACTIONHELPER_HXX
+#define INCLUDED_CUI_SOURCE_INC_SFXREDACTIONHELPER_HXX
+
+#include <com/sun/star/uno/Reference.hxx>
+#include <com/sun/star/lang/XComponent.hpp>
+
+#include <sal/types.h>
+#include <rtl/ustring.hxx>
+
+#include <vector>
+
+using namespace ::com::sun::star;
+using namespace ::com::sun::star::lang;
+using namespace ::com::sun::star::uno;
+
+class SfxRequest;
+class SfxStringItem;
+class GDIMetaFile;
+class DocumentToGraphicRenderer;
+class SfxViewFrame;
+
+/*
+ * Mostly a bunch of static methods to handle the redaction functionality at
+ * different points of the process.
+ **/
+class SfxRedactionHelper
+{
+public:
+    /// Checks to see if the request has a parameter of IsRedactMode:bool=true
+    static bool isRedactMode(const SfxRequest& rReq);
+    /*
+     * Returns the value of the given string param as an OUString
+     * Returns empty OUString if no param
+     * */
+    static OUString getStringParam(const SfxRequest& rReq, const sal_uInt16& nParamId);
+    /*
+     * Creates metafiles from the pages of the given document,
+     * and pushes into the given vector.
+     * */
+    static void getPageMetaFilesFromDoc(std::vector<GDIMetaFile>& aMetaFiles,
+                                        const sal_Int32& nPages,
+                                        DocumentToGraphicRenderer& aRenderer, bool bIsWriter,
+                                        bool bIsCalc);
+    /*
+     * Creates one shape and one draw page for each gdimetafile,
+     * and inserts the shapes into the newly created draw pages.
+     * */
+    static void addPagesToDraw(uno::Reference<XComponent>& xComponent, const sal_Int32& nPages,
+                               const std::vector<GDIMetaFile>& aMetaFiles, bool bIsCalc);
+    /*
+     * Makes the Redaction toolbar visible to the user.
+     * Meant to be called after converting a document to a Draw doc
+     * for redaction purposes.
+     * */
+    static void showRedactionToolbar(SfxViewFrame* pViewFrame);
+};
+
+#endif // INCLUDED_CUI_SOURCE_INC_SFXREDACTIONHELPER_HXX
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab cinoptions=b1,g0,N-s cinkeys+=0=break: */
diff --git a/sfx2/source/doc/SfxRedactionHelper.cxx b/sfx2/source/doc/SfxRedactionHelper.cxx
new file mode 100644
index 000000000000..b23ed271eb87
--- /dev/null
+++ b/sfx2/source/doc/SfxRedactionHelper.cxx
@@ -0,0 +1,180 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4; fill-column: 100 -*- */
+/*
+ * 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/.
+ */
+
+#include <SfxRedactionHelper.hxx>
+
+#include <com/sun/star/drawing/XDrawPagesSupplier.hpp>
+#include <com/sun/star/lang/XMultiServiceFactory.hpp>
+#include <com/sun/star/beans/XPropertySet.hpp>
+#include <com/sun/star/graphic/XGraphic.hpp>
+#include <com/sun/star/frame/XLayoutManager.hpp>
+
+#include <sfx2/request.hxx>
+#include <sfx2/sfxsids.hrc>
+#include <sfx2/viewfrm.hxx>
+
+#include <svl/eitem.hxx>
+#include <svl/stritem.hxx>
+
+#include <svtools/DocumentToGraphicRenderer.hxx>
+
+#include <vcl/gdimtf.hxx>
+#include <vcl/graph.hxx>
+
+using namespace ::com::sun::star;
+using namespace ::com::sun::star::lang;
+using namespace ::com::sun::star::uno;
+
+bool SfxRedactionHelper::isRedactMode(const SfxRequest& rReq)
+{
+    const SfxItemSet* pArgs = rReq.GetArgs();
+    if (pArgs)
+    {
+        const SfxBoolItem* pIsRedactMode = rReq.GetArg<SfxBoolItem>(SID_IS_REDACT_MODE);
+        if (pIsRedactMode && pIsRedactMode->GetValue())
+            return true;
+    }
+
+    return false;
+}
+
+OUString SfxRedactionHelper::getStringParam(const SfxRequest& rReq, const sal_uInt16& nParamId)
+{
+    OUString sStringParam;
+
+    const SfxItemSet* pArgs = rReq.GetArgs();
+    if (!pArgs)
+        return sStringParam;
+
+    const SfxStringItem* pStringArg = rReq.GetArg<SfxStringItem>(nParamId);
+    if (!pStringArg)
+        return sStringParam;
+
+    sStringParam = pStringArg->GetValue();
+    return sStringParam;
+}
+
+void SfxRedactionHelper::getPageMetaFilesFromDoc(std::vector<GDIMetaFile>& aMetaFiles,
+                                                 const sal_Int32& nPages,
+                                                 DocumentToGraphicRenderer& aRenderer,
+                                                 bool bIsWriter, bool bIsCalc)
+{
+    for (sal_Int32 nPage = 1; nPage <= nPages; ++nPage)
+    {
+        ::Size aDocumentSizePixel = aRenderer.getDocumentSizeInPixels(nPage);
+        ::Point aLogicPos;
+        ::Point aCalcPageLogicPos;
+        ::Size aCalcPageContentSize;
+        ::Size aLogic = aRenderer.getDocumentSizeIn100mm(nPage, &aLogicPos, &aCalcPageLogicPos,
+                                                         &aCalcPageContentSize);
+        // FIXME: This is a temporary hack. Need to figure out a proper way to derive this scale factor.
+        ::Size aTargetSize(aDocumentSizePixel.Width() * 1.23, aDocumentSizePixel.Height() * 1.23);
+
+        Graphic aGraphic = aRenderer.renderToGraphic(nPage, aDocumentSizePixel, aTargetSize,
+                                                     COL_TRANSPARENT, true);
+        auto& rGDIMetaFile = const_cast<GDIMetaFile&>(aGraphic.GetGDIMetaFile());
+
+        // Set preferred map unit and size on the metafile, so the Shape size
+        // will be correct in MM.
+        MapMode aMapMode;
+        aMapMode.SetMapUnit(MapUnit::Map100thMM);
+        // FIXME: This is a temporary hack. Need to figure out a proper way to derive these magic numbers.
+        if (bIsWriter)
+            aMapMode.SetOrigin(::Point(-(aLogicPos.getX() - 512) * 1.53,
+                                       -((aLogicPos.getY() - 501) * 1.53 + (nPage - 1) * 740)));
+        else if (bIsCalc)
+            rGDIMetaFile.Scale(0.566, 0.566);
+
+        rGDIMetaFile.SetPrefMapMode(aMapMode);
+
+        if (bIsCalc)
+        {
+            double aWidthRatio = static_cast<double>(aCalcPageContentSize.Width()) / aLogic.Width();
+            // FIXME: Get rid of these magic numbers. Also watch for floating point rounding errors
+            rGDIMetaFile.Move(-2400 + aCalcPageLogicPos.X() * (aWidthRatio - 0.0887),
+                              -3300 + aCalcPageLogicPos.Y() * 0.64175);
+        }
+
+        rGDIMetaFile.SetPrefSize(bIsCalc ? aCalcPageContentSize : aLogic);
+
+        aMetaFiles.push_back(rGDIMetaFile);
+    }
+}
+
+void SfxRedactionHelper::addPagesToDraw(uno::Reference<XComponent>& xComponent,
+                                        const sal_Int32& nPages,
+                                        const std::vector<GDIMetaFile>& aMetaFiles, bool bIsCalc)
+{
+    // Access the draw pages
+    uno::Reference<drawing::XDrawPagesSupplier> xDrawPagesSupplier(xComponent, uno::UNO_QUERY);
+    uno::Reference<drawing::XDrawPages> xDrawPages = xDrawPagesSupplier->getDrawPages();
+
+    uno::Reference<css::lang::XMultiServiceFactory> xFactory(xComponent, uno::UNO_QUERY);
+
+    for (sal_Int32 nPage = 0; nPage < nPages; ++nPage)
+    {
+        GDIMetaFile rGDIMetaFile = aMetaFiles[nPage];
+        Graphic aGraphic(rGDIMetaFile);
+
+        uno::Reference<graphic::XGraphic> xGraph = aGraphic.GetXGraphic();
+        uno::Reference<drawing::XDrawPage> xPage = xDrawPages->insertNewByIndex(nPage);
+
+        // Create and insert the shape
+        uno::Reference<drawing::XShape> xShape(
+            xFactory->createInstance("com.sun.star.drawing.GraphicObjectShape"), uno::UNO_QUERY);
+        uno::Reference<beans::XPropertySet> xShapeProperySet(xShape, uno::UNO_QUERY);
+        xShapeProperySet->setPropertyValue("Graphic", uno::Any(xGraph));
+
+        // Set size and position
+        xShape->setSize(
+            awt::Size(rGDIMetaFile.GetPrefSize().Width(), rGDIMetaFile.GetPrefSize().Height()));
+
+        xPage->add(xShape);
+
+        // Shapes from Calc have the size of the content instead of the whole standard page (like A4)
+        // so it needs positioning on the draw page
+        if (bIsCalc)
+            xShape->setPosition(awt::Point(1000, 1000));
+    }
+
+    // Remove the extra page at the beginning
+    uno::Reference<drawing::XDrawPage> xPage(xDrawPages->getByIndex(0), uno::UNO_QUERY_THROW);
+    xDrawPages->remove(xPage);
+}
+
+void SfxRedactionHelper::showRedactionToolbar(SfxViewFrame* pViewFrame)
+{
+    if (!pViewFrame)
+        return;
+
+    Reference<frame::XFrame> xFrame = pViewFrame->GetFrame().GetFrameInterface();
+    Reference<css::beans::XPropertySet> xPropSet(xFrame, UNO_QUERY);
+    Reference<css::frame::XLayoutManager> xLayoutManager;
+
+    if (xPropSet.is())
+    {
+        try
+        {
+            Any aValue = xPropSet->getPropertyValue("LayoutManager");
+            aValue >>= xLayoutManager;
+            xLayoutManager->createElement("private:resource/toolbar/redactionbar");
+            xLayoutManager->showElement("private:resource/toolbar/redactionbar");
+        }
+        catch (const css::uno::RuntimeException&)
+        {
+            throw;
+        }
+        catch (css::uno::Exception&)
+        {
+            SAL_WARN("sfx.doc", "Exception while trying to show the Redaction Toolbar!");
+        }
+    }
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab cinoptions=b1,g0,N-s cinkeys+=0=break: */
diff --git a/sfx2/source/doc/objserv.cxx b/sfx2/source/doc/objserv.cxx
index e9d477bfd3e7..99ec1b9892ee 100644
--- a/sfx2/source/doc/objserv.cxx
+++ b/sfx2/source/doc/objserv.cxx
@@ -97,6 +97,7 @@
 #include <sfx2/objface.hxx>
 #include <sfx2/checkin.hxx>
 #include <sfx2/infobar.hxx>
+#include <SfxRedactionHelper.hxx>
 
 #include <com/sun/star/document/XDocumentSubStorageSupplier.hpp>
 #include <com/sun/star/embed/XTransactedObject.hpp>
@@ -403,42 +404,6 @@ uno::Sequence< document::CmisVersion > SfxObjectShell::GetCmisVersions( )
     return uno::Sequence< document::CmisVersion > ( );
 }
 
-namespace{
-
-/// Checks to see if the request has a parameter of IsRedactMode:bool=true
-bool isRedactMode(SfxRequest& rReq)
-{
-    const SfxItemSet *pArgs = rReq.GetArgs();
-    if (pArgs)
-    {
-        const SfxBoolItem* pIsRedactMode = rReq.GetArg<SfxBoolItem>(SID_IS_REDACT_MODE);
-        if (pIsRedactMode && pIsRedactMode->GetValue())
-            return true;
-    }
-
-    return false;
-}
-
-/// Returns the value of the given string param as an OUString
-/// Returns empty OUString if no param
-OUString getStringParam(const SfxRequest& rReq, const sal_uInt16& nParamId)
-{
-    OUString sStringParam;
-
-    const SfxItemSet *pArgs = rReq.GetArgs();
-    if (!pArgs)
-        return sStringParam;
-
-    const SfxStringItem* pStringArg = rReq.GetArg<SfxStringItem>(nParamId);
-    if (!pStringArg)
-        return sStringParam;
-
-    sStringParam = pStringArg->GetValue();
-    return sStringParam;
-}
-
-}
-
 void SfxObjectShell::ExecFile_Impl(SfxRequest &rReq)
 {
     weld::Window* pDialogParent = rReq.GetFrameWeld();
@@ -598,114 +563,24 @@ void SfxObjectShell::ExecFile_Impl(SfxRequest &rReq)
             }
 
             sal_Int32 nPages = aRenderer.getPageCount();
-
             std::vector< GDIMetaFile > aMetaFiles;
 
-            for (sal_Int32 nPage = 1; nPage <= nPages; ++nPage)
-            {
-                ::Size aDocumentSizePixel = aRenderer.getDocumentSizeInPixels(nPage);
-                ::Point aLogicPos;
-                ::Point aCalcPageLogicPos;
-                ::Size aCalcPageContentSize;
-                ::Size aLogic = aRenderer.getDocumentSizeIn100mm(nPage, &aLogicPos, &aCalcPageLogicPos, &aCalcPageContentSize);
-                // FIXME: This is a temporary hack. Need to figure out a proper way to derive this scale factor.
-                ::Size aTargetSize(aDocumentSizePixel.Width() * 1.23, aDocumentSizePixel.Height() * 1.23);
-
-                Graphic aGraphic = aRenderer.renderToGraphic(nPage, aDocumentSizePixel, aTargetSize, COL_TRANSPARENT,
-                                                             true);
-                auto& rGDIMetaFile = const_cast<GDIMetaFile&>(aGraphic.GetGDIMetaFile());
-
-                // Set preferred map unit and size on the metafile, so the Shape size
-                // will be correct in MM.
-                MapMode aMapMode;
-                aMapMode.SetMapUnit(MapUnit::Map100thMM);
-                // FIXME: This is a temporary hack. Need to figure out a proper way to derive these magic numbers.
-                if (bIsWriter)
-                    aMapMode.SetOrigin(::Point(-(aLogicPos.getX() - 512) * 1.53, -((aLogicPos.getY() - 501)* 1.53 + (nPage-1)*740 )));
-                else if (bIsCalc)
-                    rGDIMetaFile.Scale(0.566, 0.566);
-
-                rGDIMetaFile.SetPrefMapMode(aMapMode);
-
-                if (bIsCalc)
-                {
-                    double aWidthRatio = static_cast<double>(aCalcPageContentSize.Width()) / aLogic.Width();
-                    // FIXME: Get rid of these magic numbers. Also watch for floating point rounding errors
-                    rGDIMetaFile.Move(-2400 + aCalcPageLogicPos.X() * (aWidthRatio - 0.0887), -3300 + aCalcPageLogicPos.Y() * 0.64175);
-                }
-
-                rGDIMetaFile.SetPrefSize( bIsCalc ? aCalcPageContentSize : aLogic );
-
-                aMetaFiles.push_back(rGDIMetaFile);
-            }
+            // Convert the pages of the document to gdimetafiles
+            SfxRedactionHelper::getPageMetaFilesFromDoc(aMetaFiles, nPages, aRenderer, bIsWriter, bIsCalc);
 
             // Create an empty Draw component.
             uno::Reference<frame::XDesktop2> xDesktop = css::frame::Desktop::create(comphelper::getProcessComponentContext());
             uno::Reference<frame::XComponentLoader> xComponentLoader(xDesktop, uno::UNO_QUERY);
             uno::Reference<lang::XComponent> xComponent = xComponentLoader->loadComponentFromURL("private:factory/sdraw", "_default", 0, {});
 
-            // Access the draw pages
-            uno::Reference<drawing::XDrawPagesSupplier> xDrawPagesSupplier(xComponent, uno::UNO_QUERY);
-            uno::Reference<drawing::XDrawPages> xDrawPages = xDrawPagesSupplier->getDrawPages();
-
-            uno::Reference<css::lang::XMultiServiceFactory> xFactory(xComponent, uno::UNO_QUERY);
-
-            for (sal_Int32 nPage = 0; nPage < nPages; ++nPage)
-            {
-                GDIMetaFile rGDIMetaFile = aMetaFiles[nPage];
-                Graphic aGraphic(rGDIMetaFile);
-
-                uno::Reference<graphic::XGraphic> xGraph = aGraphic.GetXGraphic();
-                uno::Reference< drawing::XDrawPage > xPage = xDrawPages->insertNewByIndex(nPage);
-
-                // Create and insert the shape
-                uno::Reference<drawing::XShape> xShape(
-                        xFactory->createInstance("com.sun.star.drawing.GraphicObjectShape"), uno::UNO_QUERY);
-                uno::Reference<beans::XPropertySet> xShapeProperySet(xShape, uno::UNO_QUERY);
-                xShapeProperySet->setPropertyValue("Graphic", uno::Any( xGraph ));
-
-                // Set size and position
-                xShape->setSize(awt::Size(rGDIMetaFile.GetPrefSize().Width(),rGDIMetaFile.GetPrefSize().Height()) );
-
-                xPage->add(xShape);
-
-                // Shapes from Calc have the size of the content instead of the whole standard page (like A4)
-                // so it needs positioning on the draw page
-                if (bIsCalc)
-                    xShape->setPosition(awt::Point(1000,1000));
-            }
-
-            // Remove the extra page at the beginning
-            uno::Reference< drawing::XDrawPage > xPage( xDrawPages->getByIndex( 0 ), uno::UNO_QUERY_THROW );
-            xDrawPages->remove( xPage );
+            // Add the doc pages to the new draw document
+            SfxRedactionHelper::addPagesToDraw(xComponent, nPages, aMetaFiles, bIsCalc);
 
             // Show the Redaction toolbar
             SfxViewFrame* pViewFrame = SfxViewFrame::Current();
-            if (pViewFrame)
-            {
-                Reference<frame::XFrame> xFrame = pViewFrame->GetFrame().GetFrameInterface();
-                Reference<css::beans::XPropertySet> xPropSet( xFrame, UNO_QUERY );
-                Reference<css::frame::XLayoutManager> xLayoutManager;
-
-                if ( xPropSet.is() )
-                {
-                    try
-                    {
-                        Any aValue = xPropSet->getPropertyValue( "LayoutManager" );
-                        aValue >>= xLayoutManager;
-                        xLayoutManager->createElement( "private:resource/toolbar/redactionbar" );
-                        xLayoutManager->showElement("private:resource/toolbar/redactionbar");
-                    }
-                    catch ( const css::uno::RuntimeException& )
-                    {
-                        throw;
-                    }
-                    catch ( css::uno::Exception& )
-                    {
-                         SAL_WARN( "sfx.doc", "Exception while trying to show the Redaction Toolbar!");
-                    }
-                }
-            }
+            if (!pViewFrame)
+                return;
+            SfxRedactionHelper::showRedactionToolbar(pViewFrame);
 
             return;
         }
@@ -721,9 +596,9 @@ void SfxObjectShell::ExecFile_Impl(SfxRequest &rReq)
 
             // Redaction finalization takes place in Draw
             if ( xServiceInfo.is() && xServiceInfo->supportsService("com.sun.star.drawing.DrawingDocument")
-                 && isRedactMode(rReq) )
+                 && SfxRedactionHelper::isRedactMode(rReq) )
             {
-                OUString sRedactionStyle(getStringParam(rReq, SID_REDACTION_STYLE));
+                OUString sRedactionStyle(SfxRedactionHelper::getStringParam(rReq, SID_REDACTION_STYLE));
 
                 // Access the draw pages
                 uno::Reference<drawing::XDrawPagesSupplier> xDrawPagesSupplier(xComponent, uno::UNO_QUERY);
@@ -996,7 +871,7 @@ void SfxObjectShell::ExecFile_Impl(SfxRequest &rReq)
             }
 
             if (nId == SID_DIRECTEXPORTDOCASPDF &&
-                    isRedactMode(rReq))
+                    SfxRedactionHelper::isRedactMode(rReq))
             {
                 // Return the finalized redaction shapes back to normal (gray & transparent)
                 uno::Reference< lang::XComponent > xComponent( GetCurrentComponent(), uno::UNO_QUERY );