Add ITiledRenderable.

We want to have a simple interface that allows access to tiled
rendering without digging into the internals of writer
(and in the future calc/impress/draw).

Change-Id: Ia9c278a48c919333186e5361ff25bb1ab603b846

include/vcl/ITiledRenderable.hxx

@@ -0,0 +1,48 @@
+/* -*- 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/.
+ *
+ */
+
+#ifndef INCLUDED_VCL_ITILEDRENDERABLE_HXX
+#define INCLUDED_VCL_ITILEDRENDERABLE_HXX
+
+#include <tools/gen.hxx>
+#include <vcl/virdev.hxx>
+
+namespace vcl
+{
+
+class VCL_DLLPUBLIC ITiledRenderable
+{
+public:
+    virtual ~ITiledRenderable() {};
+
+    /**
+     * Paint a tile to a given VirtualDevice.
+     *
+     * Output parameters are measured in pixels, tile parameters are in
+     * twips.
+     */
+    virtual void paintTile( VirtualDevice &rDevice,
+                            int nOutputWidth,
+                            int nOutputHeight,
+                            int nTilePosX,
+                            int nTilePosY,
+                            long nTileWidth,
+                            long nTileHeight ) = 0;
+
+    /**
+     * Get the document size in twips.
+     */
+    virtual Size getDocumentSize() = 0;
+
+};
+
+} // namespace vcl
+
+#endif // INCLUDED_VCL_ITILEDRENDERABLE_HXX

sw/inc/unotxdoc.hxx

@@ -67,6 +67,7 @@
 #include <cppuhelper/weak.hxx>
 #include <cppuhelper/implbase2.hxx>
 #include <cppuhelper/implbase4.hxx>
+#include <vcl/ITiledRenderable.hxx>
 
 #include <unobaseclass.hxx>
 #include <viewopt.hxx>
@@ -161,7 +162,8 @@ SwXTextDocumentBaseClass;
 
 class SW_DLLPUBLIC SwXTextDocument : public SwXTextDocumentBaseClass,
     public SvxFmMSFactory,
-    public SfxBaseModel
+    public SfxBaseModel,
+    public ::vcl::ITiledRenderable
 {
 private:
     class Impl;
@@ -428,6 +430,16 @@ public:
     // ::com::sun::star::util::XCloneable
     virtual ::com::sun::star::uno::Reference< ::com::sun::star::util::XCloneable > SAL_CALL createClone(  ) throw (::com::sun::star::uno::RuntimeException, std::exception) SAL_OVERRIDE;
 
+    // ITiledRenderable
+    virtual void paintTile( VirtualDevice &rDevice,
+                            int nOutputWidth,
+                            int nOutputHeight,
+                            int nTilePosX,
+                            int nTilePosY,
+                            long nTileWidth,
+                            long nTileHeight ) SAL_OVERRIDE;
+    virtual Size getDocumentSize() SAL_OVERRIDE;
+
     void                        Invalidate();
     void                        Reactivate(SwDocShell* pNewDocShell);
     SwXDocumentPropertyHelper * GetPropertyHelper ();

sw/source/uibase/uno/unotxdoc.cxx

@@ -3119,6 +3119,24 @@ uno::Reference< util::XCloneable > SwXTextDocument::createClone(  ) throw (uno::
     return uno::Reference< util::XCloneable >( xNewModel, UNO_QUERY );
 }
 
+void SwXTextDocument::paintTile( VirtualDevice &rDevice,
+                                 int nOutputWidth, int nOutputHeight,
+                                 int nTilePosX, int nTilePosY,
+                                 long nTileWidth, long nTileHeight )
+{
+    SwDoc* pDoc = pDocShell->GetDoc();
+    SwViewShell* pViewShell = pDoc->GetCurrentViewShell();
+    pViewShell->PaintTile(rDevice, nOutputWidth, nOutputHeight,
+                          nTilePosX, nTilePosY, nTileWidth, nTileHeight);
+}
+
+Size SwXTextDocument::getDocumentSize()
+{
+    SwDoc* pDoc = pDocShell->GetDoc();
+    SwViewShell* pViewShell = pDoc->GetCurrentViewShell();
+    return pViewShell->GetDocSize();
+}
+
 void * SAL_CALL SwXTextDocument::operator new( size_t t) throw()
 {
     return SwXTextDocumentBaseClass::operator new(t);