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+/* -*- 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 <svx/e3dsceneupdater.hxx>
+#include <drawinglayer/geometry/viewinformation3d.hxx>
+#include <svx/obj3d.hxx>
+#include <svx/scene3d.hxx>
+#include <svx/sdr/contact/viewcontactofe3dscene.hxx>
+
+
+E3DModifySceneSnapRectUpdater::E3DModifySceneSnapRectUpdater(const SdrObject* pObject)
+: mpScene(nullptr)
+{
+ // Secure old 3D transformation stack before modification
+ const E3dObject* pE3dObject = DynCastE3dObject(pObject);
+ if(!pE3dObject)
+ return;
+
+ mpScene = pE3dObject->getRootE3dSceneFromE3dObject();
+
+ if(nullptr == mpScene || mpScene->getRootE3dSceneFromE3dObject() != mpScene)
+ return;
+
+ // if there is a scene and it's the outmost scene, get current 3D range
+ const sdr::contact::ViewContactOfE3dScene& rVCScene = static_cast< sdr::contact::ViewContactOfE3dScene& >(mpScene->GetViewContact());
+ const basegfx::B3DRange aAllContentRange(rVCScene.getAllContentRange3D());
+
+ if(aAllContentRange.isEmpty())
+ {
+ // no content, nothing to do
+ mpScene = nullptr;
+ }
+ else
+ {
+ // secure current 3D transformation stack
+ mpViewInformation3D = rVCScene.getViewInformation3D(aAllContentRange);
+ }
+}
+
+E3DModifySceneSnapRectUpdater::~E3DModifySceneSnapRectUpdater()
+{
+ if(!(mpScene && mpViewInformation3D))
+ return;
+
+ // after changing parts of the scene, use the secured last 3d transformation stack and the new content
+ // range to calculate a new, eventually expanded or shrunk, 2D geometry for the scene and apply it.
+ // Get new content range
+ const sdr::contact::ViewContactOfE3dScene& rVCScene = static_cast< sdr::contact::ViewContactOfE3dScene& >(mpScene->GetViewContact());
+ basegfx::B3DRange aAllContentRange(rVCScene.getAllContentRange3D());
+
+ // only change when there is still content; else let scene stay at old SnapRect
+ if(aAllContentRange.isEmpty())
+ return;
+
+ // check if object transform of scene has changed
+ if(mpViewInformation3D->getObjectTransformation() != mpScene->GetTransform())
+ {
+ // If Yes, it needs to be updated since it's - for historical reasons -
+ // part of the basic 3d transformation stack of the scene
+ mpViewInformation3D = drawinglayer::geometry::ViewInformation3D(
+ mpScene->GetTransform(), // replace object transformation with new local transform
+ mpViewInformation3D->getOrientation(),
+ mpViewInformation3D->getProjection(),
+ mpViewInformation3D->getDeviceToView(),
+ mpViewInformation3D->getViewTime(),
+ mpViewInformation3D->getExtendedInformationSequence());
+ }
+
+ // transform content range to scene-relative coordinates using old 3d transformation stack
+ aAllContentRange.transform(mpViewInformation3D->getObjectToView());
+
+ // build 2d relative content range
+ basegfx::B2DRange aSnapRange(
+ aAllContentRange.getMinX(), aAllContentRange.getMinY(),
+ aAllContentRange.getMaxX(), aAllContentRange.getMaxY());
+
+ // transform to 2D world coordinates using scene's 2D transformation
+ aSnapRange.transform(rVCScene.getObjectTransformation());
+
+ // snap to (old) integer
+ const tools::Rectangle aNewSnapRect(
+ sal_Int32(floor(aSnapRange.getMinX())), sal_Int32(floor(aSnapRange.getMinY())),
+ sal_Int32(ceil(aSnapRange.getMaxX())), sal_Int32(ceil(aSnapRange.getMaxY())));
+
+ // set as new SnapRect and invalidate bound volume
+ if(mpScene->GetSnapRect() != aNewSnapRect)
+ {
+ mpScene->SetSnapRect(aNewSnapRect);
+ mpScene->InvalidateBoundVolume();
+ }
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */