diff --git a/libs/image/kis_layer_utils.cpp b/libs/image/kis_layer_utils.cpp
index 5ffd9b7446..ec1d49d91c 100644
--- a/libs/image/kis_layer_utils.cpp
+++ b/libs/image/kis_layer_utils.cpp
@@ -1,1559 +1,1571 @@
 /*
  *  Copyright (c) 2015 Dmitry Kazakov <dimula73@gmail.com>
  *
  *  This program is free software; you can redistribute it and/or modify
  *  it under the terms of the GNU General Public License as published by
  *  the Free Software Foundation; either version 2 of the License, or
  *  (at your option) any later version.
  *
  *  This program is distributed in the hope that it will be useful,
  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  *  GNU General Public License for more details.
  *
  *  You should have received a copy of the GNU General Public License
  *  along with this program; if not, write to the Free Software
  *  Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
  */
 
 #include "kis_layer_utils.h"
 
 #include <algorithm>
 
 #include <QUuid>
 #include <KoColorSpaceConstants.h>
 #include <KoProperties.h>
 
 #include "kis_painter.h"
 #include "kis_image.h"
 #include "kis_node.h"
 #include "kis_layer.h"
 #include "kis_paint_layer.h"
 #include "kis_clone_layer.h"
 #include "kis_group_layer.h"
 #include "kis_selection.h"
 #include "kis_selection_mask.h"
 #include "kis_meta_data_merge_strategy.h"
 #include <kundo2command.h>
 #include "commands/kis_image_layer_add_command.h"
 #include "commands/kis_image_layer_remove_command.h"
 #include "commands/kis_image_layer_move_command.h"
 #include "commands/kis_image_change_layers_command.h"
 #include "commands_new/kis_activate_selection_mask_command.h"
 #include "commands/kis_image_change_visibility_command.h"
 #include "kis_abstract_projection_plane.h"
 #include "kis_processing_applicator.h"
 #include "kis_image_animation_interface.h"
 #include "kis_keyframe_channel.h"
 #include "kis_command_utils.h"
 #include "commands_new/kis_change_projection_color_command.h"
 #include "kis_layer_properties_icons.h"
 #include "lazybrush/kis_colorize_mask.h"
 #include "commands/kis_node_property_list_command.h"
 #include "commands/kis_node_compositeop_command.h"
 #include <KisDelayedUpdateNodeInterface.h>
 #include "krita_utils.h"
 #include "kis_image_signal_router.h"
 
 
 namespace KisLayerUtils {
 
     void fetchSelectionMasks(KisNodeList mergedNodes, QVector<KisSelectionMaskSP> &selectionMasks)
     {
         foreach (KisNodeSP node, mergedNodes) {
 
             Q_FOREACH(KisNodeSP child, node->childNodes(QStringList("KisSelectionMask"), KoProperties())) {
 
                 KisSelectionMaskSP mask = qobject_cast<KisSelectionMask*>(child.data());
                 if (mask) {
                     selectionMasks.append(mask);
                 }
             }
         }
     }
 
     struct MergeDownInfoBase {
         MergeDownInfoBase(KisImageSP _image)
             : image(_image),
               storage(new SwitchFrameCommand::SharedStorage())
         {
         }
         virtual ~MergeDownInfoBase() {}
 
         KisImageWSP image;
 
         QVector<KisSelectionMaskSP> selectionMasks;
 
         KisNodeSP dstNode;
 
         SwitchFrameCommand::SharedStorageSP storage;
         QSet<int> frames;
         bool useInTimeline = false;
         bool enableOnionSkins = false;
 
         virtual KisNodeList allSrcNodes() = 0;
 
         KisLayerSP dstLayer() {
             return qobject_cast<KisLayer*>(dstNode.data());
         }
     };
 
     struct MergeDownInfo : public MergeDownInfoBase {
         MergeDownInfo(KisImageSP _image,
                       KisLayerSP _prevLayer,
                       KisLayerSP _currLayer)
             : MergeDownInfoBase(_image),
               prevLayer(_prevLayer),
               currLayer(_currLayer)
         {
             frames =
                 fetchLayerFramesRecursive(prevLayer) |
                 fetchLayerFramesRecursive(currLayer);
 
             useInTimeline = prevLayer->useInTimeline() || currLayer->useInTimeline();
 
             const KisPaintLayer *paintLayer = qobject_cast<KisPaintLayer*>(currLayer.data());
             if (paintLayer) enableOnionSkins |= paintLayer->onionSkinEnabled();
 
             paintLayer = qobject_cast<KisPaintLayer*>(prevLayer.data());
             if (paintLayer) enableOnionSkins |= paintLayer->onionSkinEnabled();
         }
 
         KisLayerSP prevLayer;
         KisLayerSP currLayer;
 
         KisNodeList allSrcNodes() override {
             KisNodeList mergedNodes;
             mergedNodes << currLayer;
             mergedNodes << prevLayer;
             return mergedNodes;
         }
     };
 
     struct MergeMultipleInfo : public MergeDownInfoBase {
         MergeMultipleInfo(KisImageSP _image,
                           KisNodeList _mergedNodes)
             : MergeDownInfoBase(_image),
               mergedNodes(_mergedNodes)
         {
             foreach (KisNodeSP node, mergedNodes) {
                 frames |= fetchLayerFramesRecursive(node);
                 useInTimeline |= node->useInTimeline();
 
                 const KisPaintLayer *paintLayer = qobject_cast<KisPaintLayer*>(node.data());
                 if (paintLayer) {
                     enableOnionSkins |= paintLayer->onionSkinEnabled();
                 }
             }
         }
 
         KisNodeList mergedNodes;
         bool nodesCompositingVaries = false;
 
         KisNodeList allSrcNodes() override {
             return mergedNodes;
         }
     };
 
     typedef QSharedPointer<MergeDownInfoBase> MergeDownInfoBaseSP;
     typedef QSharedPointer<MergeDownInfo> MergeDownInfoSP;
     typedef QSharedPointer<MergeMultipleInfo> MergeMultipleInfoSP;
 
     struct FillSelectionMasks : public KUndo2Command {
         FillSelectionMasks(MergeDownInfoBaseSP info) : m_info(info) {}
 
         void redo() override {
             fetchSelectionMasks(m_info->allSrcNodes(), m_info->selectionMasks);
         }
 
     private:
         MergeDownInfoBaseSP m_info;
     };
 
     struct DisableColorizeKeyStrokes : public KisCommandUtils::AggregateCommand {
         DisableColorizeKeyStrokes(MergeDownInfoBaseSP info) : m_info(info) {}
 
         void populateChildCommands() override {
             Q_FOREACH (KisNodeSP node, m_info->allSrcNodes()) {
                 recursiveApplyNodes(node,
                                     [this] (KisNodeSP node) {
                                         if (dynamic_cast<KisColorizeMask*>(node.data()) &&
                                             KisLayerPropertiesIcons::nodeProperty(node, KisLayerPropertiesIcons::colorizeEditKeyStrokes, true).toBool()) {
 
                                             KisBaseNode::PropertyList props = node->sectionModelProperties();
                                             KisLayerPropertiesIcons::setNodeProperty(&props,
                                                                                      KisLayerPropertiesIcons::colorizeEditKeyStrokes,
                                                                                      false);
 
                                             addCommand(new KisNodePropertyListCommand(node, props));
                                         }
                                     });
             }
         }
 
     private:
         MergeDownInfoBaseSP m_info;
     };
 
     struct DisableOnionSkins : public KisCommandUtils::AggregateCommand {
         DisableOnionSkins(MergeDownInfoBaseSP info) : m_info(info) {}
 
         void populateChildCommands() override {
             Q_FOREACH (KisNodeSP node, m_info->allSrcNodes()) {
                 recursiveApplyNodes(node,
                                     [this] (KisNodeSP node) {
                                         if (KisLayerPropertiesIcons::nodeProperty(node, KisLayerPropertiesIcons::onionSkins, false).toBool()) {
 
                                             KisBaseNode::PropertyList props = node->sectionModelProperties();
                                             KisLayerPropertiesIcons::setNodeProperty(&props,
                                                                                      KisLayerPropertiesIcons::onionSkins,
                                                                                      false);
 
                                             addCommand(new KisNodePropertyListCommand(node, props));
                                         }
                                     });
             }
         }
 
     private:
         MergeDownInfoBaseSP m_info;
     };
 
     struct DisableExtraCompositing : public KisCommandUtils::AggregateCommand {
         DisableExtraCompositing(MergeMultipleInfoSP info) : m_info(info) {}
 
         void populateChildCommands() override {
             /**
              * We disable extra compositing only in case all the layers have
              * the same compositing properties, therefore, we can just sum them using
              * Normal blend mode
              */
             if (m_info->nodesCompositingVaries) return;
 
             // we should disable dirty requests on **redo only**, otherwise
             // the state of the layers will not be recovered on undo
             m_info->image->disableDirtyRequests();
 
             Q_FOREACH (KisNodeSP node, m_info->allSrcNodes()) {
                 if (node->compositeOpId() != COMPOSITE_OVER) {
                     addCommand(new KisNodeCompositeOpCommand(node, node->compositeOpId(), COMPOSITE_OVER));
                 }
 
                 if (KisLayerPropertiesIcons::nodeProperty(node, KisLayerPropertiesIcons::inheritAlpha, false).toBool()) {
 
                     KisBaseNode::PropertyList props = node->sectionModelProperties();
                     KisLayerPropertiesIcons::setNodeProperty(&props,
                                                              KisLayerPropertiesIcons::inheritAlpha,
                                                              false);
 
                     addCommand(new KisNodePropertyListCommand(node, props));
                 }
             }
 
             m_info->image->enableDirtyRequests();
         }
 
     private:
         MergeMultipleInfoSP m_info;
     };
 
     struct DisablePassThroughForHeadsOnly : public KisCommandUtils::AggregateCommand {
         DisablePassThroughForHeadsOnly(MergeDownInfoBaseSP info, bool skipIfDstIsGroup = false)
             : m_info(info),
               m_skipIfDstIsGroup(skipIfDstIsGroup)
         {
         }
 
         void populateChildCommands() override {
             if (m_skipIfDstIsGroup &&
                 m_info->dstLayer() &&
                 m_info->dstLayer()->inherits("KisGroupLayer")) {
 
                 return;
             }
 
 
             Q_FOREACH (KisNodeSP node, m_info->allSrcNodes()) {
                 if (KisLayerPropertiesIcons::nodeProperty(node, KisLayerPropertiesIcons::passThrough, false).toBool()) {
 
                     KisBaseNode::PropertyList props = node->sectionModelProperties();
                     KisLayerPropertiesIcons::setNodeProperty(&props,
                                                              KisLayerPropertiesIcons::passThrough,
                                                              false);
 
                     addCommand(new KisNodePropertyListCommand(node, props));
                 }
             }
         }
 
     private:
         MergeDownInfoBaseSP m_info;
         bool m_skipIfDstIsGroup;
     };
 
     struct RefreshHiddenAreas : public KUndo2Command {
         RefreshHiddenAreas(MergeDownInfoBaseSP info) : m_info(info) {}
 
         void redo() override {
             KisImageAnimationInterface *interface = m_info->image->animationInterface();
             const QRect preparedRect = !interface->externalFrameActive() ?
                 m_info->image->bounds() : QRect();
 
             foreach (KisNodeSP node, m_info->allSrcNodes()) {
                 refreshHiddenAreaAsync(node, preparedRect);
             }
         }
 
     private:
         QRect realNodeExactBounds(KisNodeSP rootNode, QRect currentRect = QRect()) {
             KisNodeSP node = rootNode->firstChild();
 
             while(node) {
                 currentRect |= realNodeExactBounds(node, currentRect);
                 node = node->nextSibling();
             }
 
             if (!rootNode->isFakeNode()) {
                 // TODO: it would be better to count up changeRect inside
                 // node's extent() method
                 currentRect |= rootNode->projectionPlane()->changeRect(rootNode->exactBounds());
             }
 
             return currentRect;
         }
 
         void refreshHiddenAreaAsync(KisNodeSP rootNode, const QRect &preparedArea) {
             QRect realNodeRect = realNodeExactBounds(rootNode);
             if (!preparedArea.contains(realNodeRect)) {
 
                 QRegion dirtyRegion = realNodeRect;
                 dirtyRegion -= preparedArea;
 
                 foreach(const QRect &rc, dirtyRegion.rects()) {
                     m_info->image->refreshGraphAsync(rootNode, rc, realNodeRect);
                 }
             }
         }
     private:
         MergeDownInfoBaseSP m_info;
     };
 
     struct RefreshDelayedUpdateLayers : public KUndo2Command {
         RefreshDelayedUpdateLayers(MergeDownInfoBaseSP info) : m_info(info) {}
 
         void redo() override {
             foreach (KisNodeSP node, m_info->allSrcNodes()) {
                 forceAllDelayedNodesUpdate(node);
             }
         }
 
     private:
         MergeDownInfoBaseSP m_info;
     };
 
     struct KeepMergedNodesSelected : public KisCommandUtils::AggregateCommand {
         KeepMergedNodesSelected(MergeDownInfoSP info, bool finalizing)
             : m_singleInfo(info),
               m_finalizing(finalizing) {}
 
         KeepMergedNodesSelected(MergeMultipleInfoSP info, KisNodeSP putAfter, bool finalizing)
             : m_multipleInfo(info),
               m_finalizing(finalizing),
               m_putAfter(putAfter) {}
 
         void populateChildCommands() override {
             KisNodeSP prevNode;
             KisNodeSP nextNode;
             KisNodeList prevSelection;
             KisNodeList nextSelection;
             KisImageSP image;
 
             if (m_singleInfo) {
                 prevNode = m_singleInfo->currLayer;
                 nextNode = m_singleInfo->dstNode;
                 image = m_singleInfo->image;
             } else if (m_multipleInfo) {
                 prevNode = m_putAfter;
                 nextNode = m_multipleInfo->dstNode;
                 prevSelection = m_multipleInfo->allSrcNodes();
                 image = m_multipleInfo->image;
             }
 
             if (!m_finalizing) {
                 addCommand(new KeepNodesSelectedCommand(prevSelection, KisNodeList(),
                                                         prevNode, KisNodeSP(),
                                                         image, false));
             } else {
                 addCommand(new KeepNodesSelectedCommand(KisNodeList(), nextSelection,
                                                         KisNodeSP(), nextNode,
                                                         image, true));
             }
         }
 
     private:
         MergeDownInfoSP m_singleInfo;
         MergeMultipleInfoSP m_multipleInfo;
         bool m_finalizing;
         KisNodeSP m_putAfter;
     };
 
     struct CreateMergedLayer : public KisCommandUtils::AggregateCommand {
         CreateMergedLayer(MergeDownInfoSP info) : m_info(info) {}
 
         void populateChildCommands() override {
             // actual merging done by KisLayer::createMergedLayer (or specialized descendant)
             m_info->dstNode = m_info->currLayer->createMergedLayerTemplate(m_info->prevLayer);
 
             if (m_info->frames.size() > 0) {
                 m_info->dstNode->enableAnimation();
                 m_info->dstNode->getKeyframeChannel(KisKeyframeChannel::Content.id(), true);
             }
 
             m_info->dstNode->setUseInTimeline(m_info->useInTimeline);
 
             KisPaintLayer *dstPaintLayer = qobject_cast<KisPaintLayer*>(m_info->dstNode.data());
             if (dstPaintLayer) {
                 dstPaintLayer->setOnionSkinEnabled(m_info->enableOnionSkins);
             }
         }
 
     private:
         MergeDownInfoSP m_info;
     };
 
     struct CreateMergedLayerMultiple : public KisCommandUtils::AggregateCommand {
         CreateMergedLayerMultiple(MergeMultipleInfoSP info, const QString name = QString() )
             : m_info(info),
               m_name(name) {}
 
         void populateChildCommands() override {
             QString mergedLayerName;
             if (m_name.isEmpty()){
                 const QString mergedLayerSuffix = i18n("Merged");
                 mergedLayerName = m_info->mergedNodes.first()->name();
 
                 if (!mergedLayerName.endsWith(mergedLayerSuffix)) {
                     mergedLayerName = QString("%1 %2")
                         .arg(mergedLayerName).arg(mergedLayerSuffix);
                 }
             } else {
                 mergedLayerName = m_name;
             }
 
             KisPaintLayer *dstPaintLayer = new KisPaintLayer(m_info->image, mergedLayerName, OPACITY_OPAQUE_U8);
             m_info->dstNode = dstPaintLayer;
 
             if (m_info->frames.size() > 0) {
                 m_info->dstNode->enableAnimation();
                 m_info->dstNode->getKeyframeChannel(KisKeyframeChannel::Content.id(), true);
             }
 
 
             auto channelFlagsLazy = [](KisNodeSP node) {
                 KisLayer *layer = dynamic_cast<KisLayer*>(node.data());
                 return layer ? layer->channelFlags() : QBitArray();
             };
 
             QString compositeOpId;
             QBitArray channelFlags;
             bool compositionVaries = false;
             bool isFirstCycle = true;
 
             foreach (KisNodeSP node, m_info->allSrcNodes()) {
                 if (isFirstCycle) {
                     compositeOpId = node->compositeOpId();
                     channelFlags = channelFlagsLazy(node);
                     isFirstCycle = false;
                 } else if (compositeOpId != node->compositeOpId() ||
                            channelFlags != channelFlagsLazy(node)) {
                     compositionVaries = true;
                     break;
                 }
 
                 KisLayerSP layer = qobject_cast<KisLayer*>(node.data());
                 if (layer && layer->layerStyle()) {
                     compositionVaries = true;
                     break;
                 }
             }
 
             if (!compositionVaries) {
                 if (!compositeOpId.isEmpty()) {
                     m_info->dstNode->setCompositeOpId(compositeOpId);
                 }
                 if (m_info->dstLayer() && !channelFlags.isEmpty()) {
                     m_info->dstLayer()->setChannelFlags(channelFlags);
                 }
             }
 
             m_info->nodesCompositingVaries = compositionVaries;
 
             m_info->dstNode->setUseInTimeline(m_info->useInTimeline);
             dstPaintLayer->setOnionSkinEnabled(m_info->enableOnionSkins);
         }
 
     private:
         MergeMultipleInfoSP m_info;
         QString m_name;
     };
 
     struct MergeLayers : public KisCommandUtils::AggregateCommand {
         MergeLayers(MergeDownInfoSP info) : m_info(info) {}
 
         void populateChildCommands() override {
             // actual merging done by KisLayer::createMergedLayer (or specialized descendant)
             m_info->currLayer->fillMergedLayerTemplate(m_info->dstLayer(), m_info->prevLayer);
         }
 
     private:
         MergeDownInfoSP m_info;
     };
 
     struct MergeLayersMultiple : public KisCommandUtils::AggregateCommand {
         MergeLayersMultiple(MergeMultipleInfoSP info) : m_info(info) {}
 
         void populateChildCommands() override {
             KisPainter gc(m_info->dstNode->paintDevice());
 
             foreach (KisNodeSP node, m_info->allSrcNodes()) {
                 QRect rc = node->exactBounds() | m_info->image->bounds();
                 node->projectionPlane()->apply(&gc, rc);
             }
         }
 
     private:
         MergeMultipleInfoSP m_info;
     };
 
     struct MergeMetaData : public KUndo2Command {
         MergeMetaData(MergeDownInfoSP info, const KisMetaData::MergeStrategy* strategy)
             : m_info(info),
               m_strategy(strategy) {}
 
         void redo() override {
             QRect layerProjectionExtent = m_info->currLayer->projection()->extent();
             QRect prevLayerProjectionExtent = m_info->prevLayer->projection()->extent();
             int prevLayerArea = prevLayerProjectionExtent.width() * prevLayerProjectionExtent.height();
             int layerArea = layerProjectionExtent.width() * layerProjectionExtent.height();
 
             QList<double> scores;
             double norm = qMax(prevLayerArea, layerArea);
             scores.append(prevLayerArea / norm);
             scores.append(layerArea / norm);
 
             QList<const KisMetaData::Store*> srcs;
             srcs.append(m_info->prevLayer->metaData());
             srcs.append(m_info->currLayer->metaData());
             m_strategy->merge(m_info->dstLayer()->metaData(), srcs, scores);
         }
 
     private:
         MergeDownInfoSP m_info;
         const KisMetaData::MergeStrategy *m_strategy;
     };
 
     KeepNodesSelectedCommand::KeepNodesSelectedCommand(const KisNodeList &selectedBefore,
                                                        const KisNodeList &selectedAfter,
                                                        KisNodeSP activeBefore,
                                                        KisNodeSP activeAfter,
                                                        KisImageSP image,
                                                        bool finalize, KUndo2Command *parent)
         : FlipFlopCommand(finalize, parent),
           m_selectedBefore(selectedBefore),
           m_selectedAfter(selectedAfter),
           m_activeBefore(activeBefore),
           m_activeAfter(activeAfter),
           m_image(image)
     {
     }
 
     void KeepNodesSelectedCommand::partB() {
         KisImageSignalType type;
         if (getState() == State::FINALIZING) {
             type = ComplexNodeReselectionSignal(m_activeAfter, m_selectedAfter);
         } else {
             type = ComplexNodeReselectionSignal(m_activeBefore, m_selectedBefore);
         }
         m_image->signalRouter()->emitNotification(type);
     }
 
     SelectGlobalSelectionMask::SelectGlobalSelectionMask(KisImageSP image)
         : m_image(image)
     {
     }
 
     void SelectGlobalSelectionMask::redo() {
 
         KisImageSignalType type =
                 ComplexNodeReselectionSignal(m_image->rootLayer()->selectionMask(), KisNodeList());
         m_image->signalRouter()->emitNotification(type);
 
     }
 
     RemoveNodeHelper::~RemoveNodeHelper()
     {
     }
 
     /**
      * The removal of two nodes in one go may be a bit tricky, because one
      * of them may be the clone of another. If we remove the source of a
      * clone layer, it will reincarnate into a paint layer. In this case
      * the pointer to the second layer will be lost.
      *
      * That's why we need to care about the order of the nodes removal:
      * the clone --- first, the source --- last.
      */
     void RemoveNodeHelper::safeRemoveMultipleNodes(KisNodeList nodes, KisImageSP image) {
         const bool lastLayer = scanForLastLayer(image, nodes);
 
         auto isNodeWeird = [] (KisNodeSP node) {
             const bool normalCompositeMode = node->compositeOpId() == COMPOSITE_OVER;
 
             KisLayer *layer = dynamic_cast<KisLayer*>(node.data());
             const bool hasInheritAlpha = layer && layer->alphaChannelDisabled();
             return !normalCompositeMode && !hasInheritAlpha;
         };
 
         while (!nodes.isEmpty()) {
             KisNodeList::iterator it = nodes.begin();
 
             while (it != nodes.end()) {
                 if (!checkIsSourceForClone(*it, nodes)) {
                     KisNodeSP node = *it;
 
                     addCommandImpl(new KisImageLayerRemoveCommand(image, node, !isNodeWeird(node), true));
                     it = nodes.erase(it);
                 } else {
                     ++it;
                 }
             }
         }
 
         if (lastLayer) {
             KisLayerSP newLayer = new KisPaintLayer(image.data(), image->nextLayerName(), OPACITY_OPAQUE_U8, image->colorSpace());
             addCommandImpl(new KisImageLayerAddCommand(image, newLayer,
                                                        image->root(),
                                                        KisNodeSP(),
                                                        false, false));
         }
     }
 
     bool RemoveNodeHelper::checkIsSourceForClone(KisNodeSP src, const KisNodeList &nodes) {
         foreach (KisNodeSP node, nodes) {
             if (node == src) continue;
 
             KisCloneLayer *clone = dynamic_cast<KisCloneLayer*>(node.data());
 
             if (clone && KisNodeSP(clone->copyFrom()) == src) {
                 return true;
             }
         }
 
         return false;
     }
 
     bool RemoveNodeHelper::scanForLastLayer(KisImageWSP image, KisNodeList nodesToRemove) {
         bool removeLayers = false;
         Q_FOREACH(KisNodeSP nodeToRemove, nodesToRemove) {
             if (qobject_cast<KisLayer*>(nodeToRemove.data())) {
                 removeLayers = true;
                 break;
             }
         }
         if (!removeLayers) return false;
 
         bool lastLayer = true;
         KisNodeSP node = image->root()->firstChild();
         while (node) {
             if (!nodesToRemove.contains(node) &&
                 qobject_cast<KisLayer*>(node.data()) &&
                 !node->isFakeNode()) {
 
                 lastLayer = false;
                 break;
             }
             node = node->nextSibling();
         }
 
         return lastLayer;
     }
 
     SimpleRemoveLayers::SimpleRemoveLayers(const KisNodeList &nodes,
                                            KisImageSP image)
         : m_nodes(nodes),
           m_image(image)
     {
     }
 
     void SimpleRemoveLayers::populateChildCommands() {
         if (m_nodes.isEmpty()) return;
         safeRemoveMultipleNodes(m_nodes, m_image);
     }
 
     void SimpleRemoveLayers::addCommandImpl(KUndo2Command *cmd) {
         addCommand(cmd);
     }
 
     struct InsertNode : public KisCommandUtils::AggregateCommand {
         InsertNode(MergeDownInfoBaseSP info, KisNodeSP putAfter)
             : m_info(info), m_putAfter(putAfter) {}
 
         void populateChildCommands() override {
             addCommand(new KisImageLayerAddCommand(m_info->image,
                                                            m_info->dstNode,
                                                            m_putAfter->parent(),
                                                            m_putAfter,
                                                            true, false));
 
         }
 
     private:
         virtual void addCommandImpl(KUndo2Command *cmd) {
             addCommand(cmd);
         }
 
     private:
         MergeDownInfoBaseSP m_info;
         KisNodeSP m_putAfter;
     };
 
 
     struct CleanUpNodes : private RemoveNodeHelper, public KisCommandUtils::AggregateCommand {
         CleanUpNodes(MergeDownInfoBaseSP info, KisNodeSP putAfter)
             : m_info(info), m_putAfter(putAfter) {}
 
         static void findPerfectParent(KisNodeList nodesToDelete, KisNodeSP &putAfter, KisNodeSP &parent) {
             if (!putAfter) {
                 putAfter = nodesToDelete.last();
             }
 
             // Add the new merged node on top of the active node
             // -- checking all parents if they are included in nodesToDelete
             // Not every descendant is included in nodesToDelete even if in fact
             //   they are going to be deleted, so we need to check it.
             // If we consider the path from root to the putAfter node,
             //    if there are any nodes marked for deletion, any node afterwards
             //    is going to be deleted, too.
             //   example:      root . . . . . ! ! . . ! ! ! ! . . . . putAfter
             //   it should be: root . . . . . ! ! ! ! ! ! ! ! ! ! ! ! !putAfter
             //   and here:     root . . . . X ! ! . . ! ! ! ! . . . . putAfter
             //   you can see which node is "the perfect ancestor"
             //   (marked X; called "parent" in the function arguments).
             //   and here:     root . . . . . O ! . . ! ! ! ! . . . . putAfter
             //   you can see which node is "the topmost deleted ancestor" (marked 'O')
 
             KisNodeSP node = putAfter->parent();
             bool foundDeletedAncestor = false;
             KisNodeSP topmostAncestorToDelete = nullptr;
 
             while (node) {
 
                 if (nodesToDelete.contains(node)
                         && !nodesToDelete.contains(node->parent())) {
                     foundDeletedAncestor = true;
                     topmostAncestorToDelete = node;
                     // Here node is to be deleted and its parent is not,
                     // so its parent is the one of the first not deleted (="perfect") ancestors.
                     // We need the one that is closest to the top (root)
                 }
 
                 node = node->parent();
             }
 
             if (foundDeletedAncestor) {
                 parent = topmostAncestorToDelete->parent();
                 putAfter = topmostAncestorToDelete;
             }
             else {
                 parent = putAfter->parent(); // putAfter (and none of its ancestors) is to be deleted, so its parent is the first not deleted ancestor
             }
 
         }
 
         void populateChildCommands() override {
             KisNodeList nodesToDelete = m_info->allSrcNodes();
 
             KisNodeSP parent;
             findPerfectParent(nodesToDelete, m_putAfter, parent);
 
             if (!parent) {
                 KisNodeSP oldRoot = m_info->image->root();
                 KisNodeSP newRoot(new KisGroupLayer(m_info->image, "root", OPACITY_OPAQUE_U8));
 
+                // copy all fake nodes into the new image
+                KisLayerUtils::recursiveApplyNodes(oldRoot, [this, oldRoot, newRoot] (KisNodeSP node) {
+                    if (node->isFakeNode() && node->parent() == oldRoot) {
+                        addCommand(new KisImageLayerAddCommand(m_info->image,
+                                                               node->clone(),
+                                                               newRoot,
+                                                               KisNodeSP(),
+                                                               false, false));
+
+                    }
+                });
+
                 addCommand(new KisImageLayerAddCommand(m_info->image,
                                                        m_info->dstNode,
                                                        newRoot,
                                                        KisNodeSP(),
                                                        true, false));
                 addCommand(new KisImageChangeLayersCommand(m_info->image, oldRoot, newRoot));
 
             }
             else {
                 addCommand(new KisImageLayerAddCommand(m_info->image,
                                                        m_info->dstNode,
                                                        parent,
                                                        m_putAfter,
                                                        true, false));
 
 
                 /**
                  * We can merge selection masks, in this case dstLayer is not defined!
                  */
                 if (m_info->dstLayer()) {
                     reparentSelectionMasks(m_info->image,
                                            m_info->dstLayer(),
                                            m_info->selectionMasks);
                 }
 
                 KisNodeList safeNodesToDelete = m_info->allSrcNodes();
                 for (KisNodeList::iterator it = safeNodesToDelete.begin(); it != safeNodesToDelete.end(); ++it) {
                     KisNodeSP node = *it;
                     if (node->userLocked() && node->visible()) {
                         addCommand(new KisImageChangeVisibilityCommand(false, node));
                     }
                 }
 
                 KritaUtils::filterContainer<KisNodeList>(safeNodesToDelete, [](KisNodeSP node) {
                   return !node->userLocked();
                 });
                 safeRemoveMultipleNodes(safeNodesToDelete, m_info->image);
             }
 
 
         }
 
     private:
         void addCommandImpl(KUndo2Command *cmd) override {
             addCommand(cmd);
         }
 
         void reparentSelectionMasks(KisImageSP image,
                                     KisLayerSP newLayer,
                                     const QVector<KisSelectionMaskSP> &selectionMasks) {
 
             KIS_SAFE_ASSERT_RECOVER_RETURN(newLayer);
 
             foreach (KisSelectionMaskSP mask, selectionMasks) {
                 addCommand(new KisImageLayerMoveCommand(image, mask, newLayer, newLayer->lastChild()));
                 addCommand(new KisActivateSelectionMaskCommand(mask, false));
             }
         }
     private:
         MergeDownInfoBaseSP m_info;
         KisNodeSP m_putAfter;
     };
 
     SwitchFrameCommand::SharedStorage::~SharedStorage() {
     }
 
     SwitchFrameCommand::SwitchFrameCommand(KisImageSP image, int time, bool finalize, SharedStorageSP storage)
         : FlipFlopCommand(finalize),
           m_image(image),
           m_newTime(time),
           m_storage(storage) {}
 
     SwitchFrameCommand::~SwitchFrameCommand() {}
 
     void SwitchFrameCommand::partA() {
         KisImageAnimationInterface *interface = m_image->animationInterface();
         const int currentTime = interface->currentTime();
         if (currentTime == m_newTime) {
             m_storage->value = m_newTime;
             return;
         }
 
         interface->image()->disableUIUpdates();
         interface->saveAndResetCurrentTime(m_newTime, &m_storage->value);
     }
 
     void SwitchFrameCommand::partB() {
         KisImageAnimationInterface *interface = m_image->animationInterface();
         const int currentTime = interface->currentTime();
         if (currentTime == m_storage->value) {
             return;
         }
 
         interface->restoreCurrentTime(&m_storage->value);
         interface->image()->enableUIUpdates();
     }
 
     struct AddNewFrame : public KisCommandUtils::AggregateCommand {
         AddNewFrame(MergeDownInfoBaseSP info, int frame) : m_info(info), m_frame(frame) {}
 
         void populateChildCommands() override {
             KUndo2Command *cmd = new KisCommandUtils::SkipFirstRedoWrapper();
             KisKeyframeChannel *channel = m_info->dstNode->getKeyframeChannel(KisKeyframeChannel::Content.id());
             KisKeyframeSP keyframe = channel->addKeyframe(m_frame, cmd);
 
             applyKeyframeColorLabel(keyframe);
 
             addCommand(cmd);
         }
 
         void applyKeyframeColorLabel(KisKeyframeSP dstKeyframe) {
             Q_FOREACH(KisNodeSP srcNode, m_info->allSrcNodes()) {
                 Q_FOREACH(KisKeyframeChannel *channel, srcNode->keyframeChannels().values()) {
                     KisKeyframeSP keyframe = channel->keyframeAt(m_frame);
                     if (!keyframe.isNull() && keyframe->colorLabel() != 0) {
                         dstKeyframe->setColorLabel(keyframe->colorLabel());
                         return;
                     }
                 }
             }
 
             dstKeyframe->setColorLabel(0);
         }
 
     private:
         MergeDownInfoBaseSP m_info;
         int m_frame;
     };
 
     QSet<int> fetchLayerFrames(KisNodeSP node) {
         KisKeyframeChannel *channel = node->getKeyframeChannel(KisKeyframeChannel::Content.id());
         if (!channel) return QSet<int>();
 
         return channel->allKeyframeIds();
     }
 
     QSet<int> fetchLayerFramesRecursive(KisNodeSP rootNode) {
         QSet<int> frames = fetchLayerFrames(rootNode);
 
         KisNodeSP node = rootNode->firstChild();
         while(node) {
             frames |= fetchLayerFramesRecursive(node);
             node = node->nextSibling();
         }
 
         return frames;
     }
 
     void updateFrameJobs(FrameJobs *jobs, KisNodeSP node) {
         QSet<int> frames = fetchLayerFrames(node);
 
         if (frames.isEmpty()) {
             (*jobs)[0].insert(node);
         } else {
             foreach (int frame, frames) {
                 (*jobs)[frame].insert(node);
             }
         }
     }
 
     void updateFrameJobsRecursive(FrameJobs *jobs, KisNodeSP rootNode) {
         updateFrameJobs(jobs, rootNode);
 
         KisNodeSP node = rootNode->firstChild();
         while(node) {
             updateFrameJobsRecursive(jobs, node);
             node = node->nextSibling();
         }
     }
 
     void mergeDown(KisImageSP image, KisLayerSP layer, const KisMetaData::MergeStrategy* strategy)
     {
         if (!layer->prevSibling()) return;
 
         // XXX: this breaks if we allow free mixing of masks and layers
         KisLayerSP prevLayer = qobject_cast<KisLayer*>(layer->prevSibling().data());
         if (!prevLayer) return;
 
         if (!layer->visible() && !prevLayer->visible()) {
             return;
         }
 
         KisImageSignalVector emitSignals;
         emitSignals << ModifiedSignal;
 
         KisProcessingApplicator applicator(image, 0,
                                            KisProcessingApplicator::NONE,
                                            emitSignals,
                                            kundo2_i18n("Merge Down"));
 
         if (layer->visible() && prevLayer->visible()) {
             MergeDownInfoSP info(new MergeDownInfo(image, prevLayer, layer));
 
             // disable key strokes on all colorize masks, all onion skins on
             // paint layers and wait until update is finished with a barrier
             applicator.applyCommand(new DisableColorizeKeyStrokes(info));
             applicator.applyCommand(new DisableOnionSkins(info));
             applicator.applyCommand(new KUndo2Command(), KisStrokeJobData::BARRIER);
 
             applicator.applyCommand(new KeepMergedNodesSelected(info, false));
             applicator.applyCommand(new FillSelectionMasks(info));
             applicator.applyCommand(new CreateMergedLayer(info), KisStrokeJobData::BARRIER);
 
             // NOTE: shape layer may have emitted spontaneous jobs during layer creation,
             //       wait for them to complete!
             applicator.applyCommand(new RefreshDelayedUpdateLayers(info), KisStrokeJobData::BARRIER);
             applicator.applyCommand(new KUndo2Command(), KisStrokeJobData::BARRIER);
 
             // in two-layer mode we disable pass through only when the destination layer
             // is not a group layer
             applicator.applyCommand(new DisablePassThroughForHeadsOnly(info, true));
             applicator.applyCommand(new KUndo2Command(), KisStrokeJobData::BARRIER);
 
             if (info->frames.size() > 0) {
                 foreach (int frame, info->frames) {
                     applicator.applyCommand(new SwitchFrameCommand(info->image, frame, false, info->storage));
 
                     applicator.applyCommand(new AddNewFrame(info, frame));
                     applicator.applyCommand(new RefreshHiddenAreas(info));
                     applicator.applyCommand(new RefreshDelayedUpdateLayers(info), KisStrokeJobData::BARRIER);
                     applicator.applyCommand(new MergeLayers(info), KisStrokeJobData::BARRIER);
 
                     applicator.applyCommand(new SwitchFrameCommand(info->image, frame, true, info->storage));
                 }
             } else {
                 applicator.applyCommand(new RefreshHiddenAreas(info));
                 applicator.applyCommand(new RefreshDelayedUpdateLayers(info), KisStrokeJobData::BARRIER);
                 applicator.applyCommand(new MergeLayers(info), KisStrokeJobData::BARRIER);
             }
 
             applicator.applyCommand(new MergeMetaData(info, strategy), KisStrokeJobData::BARRIER);
             applicator.applyCommand(new CleanUpNodes(info, layer),
                                     KisStrokeJobData::SEQUENTIAL,
                                     KisStrokeJobData::EXCLUSIVE);
             applicator.applyCommand(new KeepMergedNodesSelected(info, true));
         } else if (layer->visible()) {
             applicator.applyCommand(new KeepNodesSelectedCommand(KisNodeList(), KisNodeList(),
                                                                  layer, KisNodeSP(),
                                                                  image, false));
 
             applicator.applyCommand(
                 new SimpleRemoveLayers(KisNodeList() << prevLayer,
                                        image),
                 KisStrokeJobData::SEQUENTIAL,
                 KisStrokeJobData::EXCLUSIVE);
 
             applicator.applyCommand(new KeepNodesSelectedCommand(KisNodeList(), KisNodeList(),
                                                                  KisNodeSP(), layer,
                                                                  image, true));
         } else if (prevLayer->visible()) {
             applicator.applyCommand(new KeepNodesSelectedCommand(KisNodeList(), KisNodeList(),
                                                                  layer, KisNodeSP(),
                                                                  image, false));
 
             applicator.applyCommand(
                 new SimpleRemoveLayers(KisNodeList() << layer,
                                        image),
                 KisStrokeJobData::SEQUENTIAL,
                 KisStrokeJobData::EXCLUSIVE);
 
             applicator.applyCommand(new KeepNodesSelectedCommand(KisNodeList(), KisNodeList(),
                                                                  KisNodeSP(), prevLayer,
                                                                  image, true));
         }
 
         applicator.end();
     }
 
     bool checkIsChildOf(KisNodeSP node, const KisNodeList &parents)
     {
         KisNodeList nodeParents;
 
         KisNodeSP parent = node->parent();
         while (parent) {
             nodeParents << parent;
             parent = parent->parent();
         }
 
         foreach(KisNodeSP perspectiveParent, parents) {
             if (nodeParents.contains(perspectiveParent)) {
                 return true;
             }
         }
 
         return false;
     }
 
     bool checkIsCloneOf(KisNodeSP node, const KisNodeList &nodes)
     {
         bool result = false;
 
         KisCloneLayer *clone = dynamic_cast<KisCloneLayer*>(node.data());
         if (clone) {
             KisNodeSP cloneSource = KisNodeSP(clone->copyFrom());
 
             Q_FOREACH(KisNodeSP subtree, nodes) {
                 result =
                     recursiveFindNode(subtree,
                                       [cloneSource](KisNodeSP node) -> bool
                                       {
                                           return node == cloneSource;
                                       });
 
                 if (!result) {
                     result = checkIsCloneOf(cloneSource, nodes);
                 }
 
                 if (result) {
                     break;
                 }
             }
         }
 
         return result;
     }
 
     void filterMergableNodes(KisNodeList &nodes, bool allowMasks)
     {
         KisNodeList::iterator it = nodes.begin();
 
         while (it != nodes.end()) {
             if ((!allowMasks && !qobject_cast<KisLayer*>(it->data())) ||
                 checkIsChildOf(*it, nodes)) {
                 //qDebug() << "Skipping node" << ppVar((*it)->name());
                 it = nodes.erase(it);
             } else {
                 ++it;
             }
         }
     }
 
     void sortMergableNodes(KisNodeSP root, KisNodeList &inputNodes, KisNodeList &outputNodes)
     {
         KisNodeList::iterator it = std::find(inputNodes.begin(), inputNodes.end(), root);
 
         if (it != inputNodes.end()) {
             outputNodes << *it;
             inputNodes.erase(it);
         }
 
         if (inputNodes.isEmpty()) {
             return;
         }
 
         KisNodeSP child = root->firstChild();
         while (child) {
             sortMergableNodes(child, inputNodes, outputNodes);
             child = child->nextSibling();
         }
 
         /**
          * By the end of recursion \p inputNodes must be empty
          */
         KIS_ASSERT_RECOVER_NOOP(root->parent() || inputNodes.isEmpty());
     }
 
     KisNodeList sortMergableNodes(KisNodeSP root, KisNodeList nodes)
     {
         KisNodeList result;
         sortMergableNodes(root, nodes, result);
         return result;
     }
 
     KisNodeList sortAndFilterMergableInternalNodes(KisNodeList nodes, bool allowMasks)
     {
         KIS_ASSERT_RECOVER(!nodes.isEmpty()) { return nodes; }
 
         KisNodeSP root;
         Q_FOREACH(KisNodeSP node, nodes) {
             KisNodeSP localRoot = node;
             while (localRoot->parent()) {
                 localRoot = localRoot->parent();
             }
 
             if (!root) {
                 root = localRoot;
             }
             KIS_ASSERT_RECOVER(root == localRoot) { return nodes; }
         }
 
         KisNodeList result;
         sortMergableNodes(root, nodes, result);
         filterMergableNodes(result, allowMasks);
         return result;
     }
 
     void addCopyOfNameTag(KisNodeSP node)
     {
         const QString prefix = i18n("Copy of");
         QString newName = node->name();
         if (!newName.startsWith(prefix)) {
             newName = QString("%1 %2").arg(prefix).arg(newName);
             node->setName(newName);
         }
     }
 
     KisNodeList findNodesWithProps(KisNodeSP root, const KoProperties &props, bool excludeRoot)
     {
         KisNodeList nodes;
 
         if ((!excludeRoot || root->parent()) && root->check(props)) {
             nodes << root;
         }
 
         KisNodeSP node = root->firstChild();
         while (node) {
             nodes += findNodesWithProps(node, props, excludeRoot);
             node = node->nextSibling();
         }
 
         return nodes;
     }
 
     KisNodeList filterInvisibleNodes(const KisNodeList &nodes, KisNodeList *invisibleNodes, KisNodeSP *putAfter)
     {
         KIS_ASSERT_RECOVER(invisibleNodes) { return nodes; }
         KIS_ASSERT_RECOVER(putAfter) { return nodes; }
 
         KisNodeList visibleNodes;
         int putAfterIndex = -1;
 
         Q_FOREACH(KisNodeSP node, nodes) {
             if (node->visible() || node->userLocked()) {
                 visibleNodes << node;
             } else {
                 *invisibleNodes << node;
 
                 if (node == *putAfter) {
                     putAfterIndex = visibleNodes.size() - 1;
                 }
             }
         }
 
         if (!visibleNodes.isEmpty() && putAfterIndex >= 0) {
             putAfterIndex = qBound(0, putAfterIndex, visibleNodes.size() - 1);
             *putAfter = visibleNodes[putAfterIndex];
         }
 
         return visibleNodes;
     }
 
     void filterUnlockedNodes(KisNodeList &nodes)
     {
         KisNodeList::iterator it = nodes.begin();
 
         while (it != nodes.end()) {
             if ((*it)->userLocked()) {
                 it = nodes.erase(it);
             } else {
                 ++it;
             }
         }
     }
 
     void changeImageDefaultProjectionColor(KisImageSP image, const KoColor &color)
     {
         KisImageSignalVector emitSignals;
         emitSignals << ModifiedSignal;
 
         KisProcessingApplicator applicator(image,
                                            image->root(),
                                            KisProcessingApplicator::RECURSIVE,
                                            emitSignals,
                                            kundo2_i18n("Change projection color"),
                                            0,
                                            142857 + 1);
         applicator.applyCommand(new KisChangeProjectionColorCommand(image, color), KisStrokeJobData::BARRIER, KisStrokeJobData::EXCLUSIVE);
         applicator.end();
     }
 
     void mergeMultipleLayersImpl(KisImageSP image, KisNodeList mergedNodes, KisNodeSP putAfter,
                                            bool flattenSingleLayer, const KUndo2MagicString &actionName,
                                            bool cleanupNodes = true, const QString layerName = QString())
     {
         if (!putAfter) {
             putAfter = mergedNodes.first();
         }
 
         filterMergableNodes(mergedNodes);
         {
             KisNodeList tempNodes;
             std::swap(mergedNodes, tempNodes);
             sortMergableNodes(image->root(), tempNodes, mergedNodes);
         }
 
         if (mergedNodes.size() <= 1 &&
             (!flattenSingleLayer && mergedNodes.size() == 1)) return;
 
         KisImageSignalVector emitSignals;
         emitSignals << ModifiedSignal;
         emitSignals << ComplexNodeReselectionSignal(KisNodeSP(), KisNodeList(), KisNodeSP(), mergedNodes);
 
         KisProcessingApplicator applicator(image, 0,
                                            KisProcessingApplicator::NONE,
                                            emitSignals,
                                            actionName);
 
 
         KisNodeList originalNodes = mergedNodes;
         KisNodeList invisibleNodes;
         mergedNodes = filterInvisibleNodes(originalNodes, &invisibleNodes, &putAfter);
 
         if (!invisibleNodes.isEmpty() && !mergedNodes.isEmpty()) {
             /* If the putAfter node is invisible,
              * we should instead pick one of the nodes
              * to be merged to avoid a null putAfter.
              */
             if (!putAfter->visible()){
                 putAfter = mergedNodes.first();
             }
 
             applicator.applyCommand(
                 new SimpleRemoveLayers(invisibleNodes,
                                        image),
                 KisStrokeJobData::SEQUENTIAL,
                 KisStrokeJobData::EXCLUSIVE);
         }
 
         if (mergedNodes.size() > 1 || invisibleNodes.isEmpty()) {
             MergeMultipleInfoSP info(new MergeMultipleInfo(image, mergedNodes));
 
             // disable key strokes on all colorize masks, all onion skins on
             // paint layers and wait until update is finished with a barrier
             applicator.applyCommand(new DisableColorizeKeyStrokes(info));
             applicator.applyCommand(new DisableOnionSkins(info));
             applicator.applyCommand(new DisablePassThroughForHeadsOnly(info));
             applicator.applyCommand(new KUndo2Command(), KisStrokeJobData::BARRIER);
 
             applicator.applyCommand(new KeepMergedNodesSelected(info, putAfter, false));
             applicator.applyCommand(new FillSelectionMasks(info));
             applicator.applyCommand(new CreateMergedLayerMultiple(info, layerName), KisStrokeJobData::BARRIER);
             applicator.applyCommand(new DisableExtraCompositing(info));
             applicator.applyCommand(new KUndo2Command(), KisStrokeJobData::BARRIER);
 
             if (!info->frames.isEmpty()) {
                 foreach (int frame, info->frames) {
                     applicator.applyCommand(new SwitchFrameCommand(info->image, frame, false, info->storage));
 
                     applicator.applyCommand(new AddNewFrame(info, frame));
                     applicator.applyCommand(new RefreshHiddenAreas(info));
                     applicator.applyCommand(new RefreshDelayedUpdateLayers(info), KisStrokeJobData::BARRIER);
                     applicator.applyCommand(new MergeLayersMultiple(info), KisStrokeJobData::BARRIER);
 
                     applicator.applyCommand(new SwitchFrameCommand(info->image, frame, true, info->storage));
                 }
             } else {
                 applicator.applyCommand(new RefreshHiddenAreas(info));
                 applicator.applyCommand(new RefreshDelayedUpdateLayers(info), KisStrokeJobData::BARRIER);
                 applicator.applyCommand(new MergeLayersMultiple(info), KisStrokeJobData::BARRIER);
             }
 
             //applicator.applyCommand(new MergeMetaData(info, strategy), KisStrokeJobData::BARRIER);
             if (cleanupNodes){
                 applicator.applyCommand(new CleanUpNodes(info, putAfter),
                                             KisStrokeJobData::SEQUENTIAL,
                                         KisStrokeJobData::EXCLUSIVE);
             } else {
                 applicator.applyCommand(new InsertNode(info, putAfter),
                                             KisStrokeJobData::SEQUENTIAL,
                                         KisStrokeJobData::EXCLUSIVE);
             }
 
             applicator.applyCommand(new KeepMergedNodesSelected(info, putAfter, true));
         }
 
         applicator.end();
 
     }
 
     void mergeMultipleLayers(KisImageSP image, KisNodeList mergedNodes, KisNodeSP putAfter)
     {
         mergeMultipleLayersImpl(image, mergedNodes, putAfter, false, kundo2_i18n("Merge Selected Nodes"));
     }
 
     void newLayerFromVisible(KisImageSP image, KisNodeSP putAfter)
     {
         KisNodeList mergedNodes;
         mergedNodes << image->root();
 
         mergeMultipleLayersImpl(image, mergedNodes, putAfter, true, kundo2_i18n("New From Visible"), false, i18nc("New layer created from all the visible layers", "Visible"));
     }
 
     struct MergeSelectionMasks : public KisCommandUtils::AggregateCommand {
         MergeSelectionMasks(MergeDownInfoBaseSP info, KisNodeSP putAfter)
             : m_info(info),
               m_putAfter(putAfter){}
 
         void populateChildCommands() override {
             KisNodeSP parent;
             CleanUpNodes::findPerfectParent(m_info->allSrcNodes(), m_putAfter, parent);
 
             KisLayerSP parentLayer;
             do {
                 parentLayer = qobject_cast<KisLayer*>(parent.data());
 
                 parent = parent->parent();
             } while(!parentLayer && parent);
 
             KisSelectionSP selection = new KisSelection();
 
             foreach (KisNodeSP node, m_info->allSrcNodes()) {
                 KisMaskSP mask = dynamic_cast<KisMask*>(node.data());
                 if (!mask) continue;
 
                 selection->pixelSelection()->applySelection(
                     mask->selection()->pixelSelection(), SELECTION_ADD);
             }
 
             KisSelectionMaskSP mergedMask = new KisSelectionMask(m_info->image);
             mergedMask->initSelection(parentLayer);
             mergedMask->setSelection(selection);
 
             m_info->dstNode = mergedMask;
         }
 
     private:
         MergeDownInfoBaseSP m_info;
         KisNodeSP m_putAfter;
     };
 
     struct ActivateSelectionMask : public KisCommandUtils::AggregateCommand {
         ActivateSelectionMask(MergeDownInfoBaseSP info)
             : m_info(info) {}
 
         void populateChildCommands() override {
             KisSelectionMaskSP mergedMask = dynamic_cast<KisSelectionMask*>(m_info->dstNode.data());
             addCommand(new KisActivateSelectionMaskCommand(mergedMask, true));
         }
 
     private:
         MergeDownInfoBaseSP m_info;
     };
 
     bool tryMergeSelectionMasks(KisImageSP image, KisNodeList mergedNodes, KisNodeSP putAfter)
     {
         QList<KisSelectionMaskSP> selectionMasks;
 
         for (auto it = mergedNodes.begin(); it != mergedNodes.end(); /*noop*/) {
             KisSelectionMaskSP mask = dynamic_cast<KisSelectionMask*>(it->data());
             if (!mask) {
                 it = mergedNodes.erase(it);
             } else {
                 selectionMasks.append(mask);
                 ++it;
             }
         }
 
         if (mergedNodes.isEmpty()) return false;
 
         KisLayerSP parentLayer = qobject_cast<KisLayer*>(selectionMasks.first()->parent().data());
         KIS_ASSERT_RECOVER(parentLayer) { return 0; }
 
         KisImageSignalVector emitSignals;
         emitSignals << ModifiedSignal;
 
         KisProcessingApplicator applicator(image, 0,
                                            KisProcessingApplicator::NONE,
                                            emitSignals,
                                            kundo2_i18n("Merge Selection Masks"));
 
         MergeMultipleInfoSP info(new MergeMultipleInfo(image, mergedNodes));
 
 
         applicator.applyCommand(new MergeSelectionMasks(info, putAfter));
         applicator.applyCommand(new CleanUpNodes(info, putAfter),
                                 KisStrokeJobData::SEQUENTIAL,
                                 KisStrokeJobData::EXCLUSIVE);
         applicator.applyCommand(new ActivateSelectionMask(info));
         applicator.end();
 
         return true;
     }
 
     void flattenLayer(KisImageSP image, KisLayerSP layer)
     {
         if (!layer->childCount() && !layer->layerStyle())
             return;
 
         KisNodeList mergedNodes;
         mergedNodes << layer;
 
         mergeMultipleLayersImpl(image, mergedNodes, layer, true, kundo2_i18n("Flatten Layer"));
     }
 
     void flattenImage(KisImageSP image, KisNodeSP activeNode)
     {
         if (!activeNode) {
             activeNode = image->root()->lastChild();
         }
 
 
         KisNodeList mergedNodes;
         mergedNodes << image->root();
 
         mergeMultipleLayersImpl(image, mergedNodes, activeNode, true, kundo2_i18n("Flatten Image"));
     }
 
     KisSimpleUpdateCommand::KisSimpleUpdateCommand(KisNodeList nodes, bool finalize, KUndo2Command *parent)
         : FlipFlopCommand(finalize, parent),
           m_nodes(nodes)
     {
     }
     void KisSimpleUpdateCommand::partB()
     {
         updateNodes(m_nodes);
     }
     void KisSimpleUpdateCommand::updateNodes(const KisNodeList &nodes)
     {
         Q_FOREACH(KisNodeSP node, nodes) {
             node->setDirty(node->extent());
         }
     }
 
     KisNodeSP recursiveFindNode(KisNodeSP node, std::function<bool(KisNodeSP)> func)
     {
         if (func(node)) {
             return node;
         }
 
         node = node->firstChild();
         while (node) {
             KisNodeSP resultNode = recursiveFindNode(node, func);
             if (resultNode) {
                 return resultNode;
             }
             node = node->nextSibling();
         }
 
         return 0;
     }
 
     KisNodeSP findNodeByUuid(KisNodeSP root, const QUuid &uuid)
     {
         return recursiveFindNode(root,
             [uuid] (KisNodeSP node) {
                 return node->uuid() == uuid;
         });
     }
 
     void forceAllDelayedNodesUpdate(KisNodeSP root)
     {
         KisLayerUtils::recursiveApplyNodes(root,
         [] (KisNodeSP node) {
             KisDelayedUpdateNodeInterface *delayedUpdate =
                     dynamic_cast<KisDelayedUpdateNodeInterface*>(node.data());
             if (delayedUpdate) {
                 delayedUpdate->forceUpdateTimedNode();
             }
         });
     }
 
     bool hasDelayedNodeWithUpdates(KisNodeSP root)
     {
         return recursiveFindNode(root,
             [] (KisNodeSP node) {
                 KisDelayedUpdateNodeInterface *delayedUpdate =
                     dynamic_cast<KisDelayedUpdateNodeInterface*>(node.data());
 
                 return delayedUpdate ? delayedUpdate->hasPendingTimedUpdates() : false;
             });
     }
 
     KisImageSP findImageByHierarchy(KisNodeSP node)
     {
         while (node) {
             const KisLayer *layer = dynamic_cast<const KisLayer*>(node.data());
             if (layer) {
                 return layer->image();
             }
 
             node = node->parent();
         }
 
         return 0;
     }
 
 }
diff --git a/libs/ui/KisDocument.cpp b/libs/ui/KisDocument.cpp
index 698853856e..85e7be645e 100644
--- a/libs/ui/KisDocument.cpp
+++ b/libs/ui/KisDocument.cpp
@@ -1,2207 +1,2217 @@
 /* This file is part of the Krita project
  *
  * Copyright (C) 2014 Boudewijn Rempt <boud@valdyas.org>
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
  * License as published by the Free Software Foundation; either
  * version 2 of the License, or (at your option) any later version.
  *
  * This library is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  * Library General Public License for more details.
  *
  * You should have received a copy of the GNU Library General Public License
  * along with this library; see the file COPYING.LIB.  If not, write to
  * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
  * Boston, MA 02110-1301, USA.
  */
 
 #include "KisMainWindow.h" // XXX: remove
 #include <QMessageBox> // XXX: remove
 
 #include <KisMimeDatabase.h>
 
 #include <KoCanvasBase.h>
 #include <KoColor.h>
 #include <KoColorProfile.h>
 #include <KoColorSpaceEngine.h>
 #include <KoColorSpace.h>
 #include <KoColorSpaceRegistry.h>
 #include <KoDocumentInfoDlg.h>
 #include <KoDocumentInfo.h>
 #include <KoDpi.h>
 #include <KoUnit.h>
 #include <KoID.h>
 #include <KoOdfReadStore.h>
 #include <KoProgressProxy.h>
 #include <KoProgressUpdater.h>
 #include <KoSelection.h>
 #include <KoShape.h>
 #include <KoShapeController.h>
 #include <KoStore.h>
 #include <KoUpdater.h>
 #include <KoXmlWriter.h>
 #include <KoXmlReader.h>
 #include <KoStoreDevice.h>
 #include <KoDialog.h>
 #include <KisImportExportErrorCode.h>
 #include <KoDocumentResourceManager.h>
 
 #include <KisUsageLogger.h>
 #include <klocalizedstring.h>
 #include <kis_debug.h>
 #include <kis_generator_layer.h>
 #include <kis_generator_registry.h>
 #include <kdesktopfile.h>
 #include <kconfiggroup.h>
 #include <kbackup.h>
 
 #include <QTextBrowser>
 #include <QApplication>
 #include <QBuffer>
 #include <QStandardPaths>
 #include <QDir>
 #include <QDomDocument>
 #include <QDomElement>
 #include <QFileInfo>
 #include <QImage>
 #include <QList>
 #include <QPainter>
 #include <QRect>
 #include <QScopedPointer>
 #include <QSize>
 #include <QStringList>
 #include <QtGlobal>
 #include <QTimer>
 #include <QWidget>
 #include <QFuture>
 #include <QFutureWatcher>
 
 // Krita Image
 #include <kis_image_animation_interface.h>
 #include <kis_config.h>
 #include <flake/kis_shape_layer.h>
 #include <kis_group_layer.h>
 #include <kis_image.h>
 #include <kis_layer.h>
 #include <kis_name_server.h>
 #include <kis_paint_layer.h>
 #include <kis_painter.h>
 #include <kis_selection.h>
 #include <kis_fill_painter.h>
 #include <kis_document_undo_store.h>
 #include <kis_idle_watcher.h>
 #include <kis_signal_auto_connection.h>
 #include <kis_canvas_widget_base.h>
 #include "kis_layer_utils.h"
 
 // Local
 #include "KisViewManager.h"
 #include "kis_clipboard.h"
 #include "widgets/kis_custom_image_widget.h"
 #include "canvas/kis_canvas2.h"
 #include "flake/kis_shape_controller.h"
 #include "kis_statusbar.h"
 #include "widgets/kis_progress_widget.h"
 #include "kis_canvas_resource_provider.h"
 #include "KisResourceServerProvider.h"
 #include "kis_node_manager.h"
 #include "KisPart.h"
 #include "KisApplication.h"
 #include "KisDocument.h"
 #include "KisImportExportManager.h"
 #include "KisView.h"
 #include "kis_grid_config.h"
 #include "kis_guides_config.h"
 #include "kis_image_barrier_lock_adapter.h"
 #include "KisReferenceImagesLayer.h"
 
 #include <mutex>
 #include "kis_config_notifier.h"
 #include "kis_async_action_feedback.h"
 #include "KisCloneDocumentStroke.h"
 
 #include <KisMirrorAxisConfig.h>
 #include <KisDecorationsWrapperLayer.h>
 #include "kis_simple_stroke_strategy.h"
 
 
 // Define the protocol used here for embedded documents' URL
 // This used to "store" but QUrl didn't like it,
 // so let's simply make it "tar" !
 #define STORE_PROTOCOL "tar"
 // The internal path is a hack to make QUrl happy and for document children
 #define INTERNAL_PROTOCOL "intern"
 #define INTERNAL_PREFIX "intern:/"
 // Warning, keep it sync in koStore.cc
 
 #include <unistd.h>
 
 using namespace std;
 
 namespace {
 constexpr int errorMessageTimeout = 5000;
 constexpr int successMessageTimeout = 1000;
 }
 
 
 /**********************************************************
  *
  * KisDocument
  *
  **********************************************************/
 
 //static
 QString KisDocument::newObjectName()
 {
     static int s_docIFNumber = 0;
     QString name; name.setNum(s_docIFNumber++); name.prepend("document_");
     return name;
 }
 
 
 class UndoStack : public KUndo2Stack
 {
 public:
     UndoStack(KisDocument *doc)
         : KUndo2Stack(doc),
           m_doc(doc)
     {
     }
 
     void setIndex(int idx) override {
         KisImageWSP image = this->image();
         image->requestStrokeCancellation();
         if(image->tryBarrierLock()) {
             KUndo2Stack::setIndex(idx);
             image->unlock();
         }
     }
 
     void notifySetIndexChangedOneCommand() override {
         KisImageWSP image = this->image();
         image->unlock();
 
         /**
          * Some very weird commands may emit blocking signals to
          * the GUI (e.g. KisGuiContextCommand). Here is the best thing
          * we can do to avoid the deadlock
          */
         while(!image->tryBarrierLock()) {
             QApplication::processEvents();
         }
     }
 
     void undo() override {
         KisImageWSP image = this->image();
         image->requestUndoDuringStroke();
 
         if (image->tryUndoUnfinishedLod0Stroke() == UNDO_OK) {
             return;
         }
 
         if(image->tryBarrierLock()) {
             KUndo2Stack::undo();
             image->unlock();
         }
     }
 
     void redo() override {
         KisImageWSP image = this->image();
         if(image->tryBarrierLock()) {
             KUndo2Stack::redo();
             image->unlock();
         }
     }
 
 private:
     KisImageWSP image() {
         KisImageWSP currentImage = m_doc->image();
         Q_ASSERT(currentImage);
         return currentImage;
     }
 
 private:
     KisDocument *m_doc;
 };
 
 class Q_DECL_HIDDEN KisDocument::Private
 {
 public:
     Private(KisDocument *_q)
         : q(_q)
         , docInfo(new KoDocumentInfo(_q)) // deleted by QObject
         , importExportManager(new KisImportExportManager(_q)) // deleted manually
         , autoSaveTimer(new QTimer(_q))
         , undoStack(new UndoStack(_q)) // deleted by QObject
         , m_bAutoDetectedMime(false)
         , modified(false)
         , readwrite(true)
         , firstMod(QDateTime::currentDateTime())
         , lastMod(firstMod)
         , nserver(new KisNameServer(1))
         , imageIdleWatcher(2000 /*ms*/)
         , globalAssistantsColor(KisConfig(true).defaultAssistantsColor())
         , savingLock(&savingMutex)
         , batchMode(false)
     {
         if (QLocale().measurementSystem() == QLocale::ImperialSystem) {
             unit = KoUnit::Inch;
         } else {
             unit = KoUnit::Centimeter;
         }
     }
 
     Private(const Private &rhs, KisDocument *_q)
         : q(_q)
         , docInfo(new KoDocumentInfo(*rhs.docInfo, _q))
         , importExportManager(new KisImportExportManager(_q))
         , autoSaveTimer(new QTimer(_q))
         , undoStack(new UndoStack(_q))
         , nserver(new KisNameServer(*rhs.nserver))
         , preActivatedNode(0) // the node is from another hierarchy!
         , imageIdleWatcher(2000 /*ms*/)
         , savingLock(&savingMutex)
     {
         copyFromImpl(rhs, _q, CONSTRUCT);
     }
 
     ~Private() {
         // Don't delete m_d->shapeController because it's in a QObject hierarchy.
         delete nserver;
     }
 
     KisDocument *q = 0;
     KoDocumentInfo *docInfo = 0;
 
     KoUnit unit;
 
     KisImportExportManager *importExportManager = 0; // The filter-manager to use when loading/saving [for the options]
 
     QByteArray mimeType; // The actual mimetype of the document
     QByteArray outputMimeType; // The mimetype to use when saving
 
     QTimer *autoSaveTimer;
     QString lastErrorMessage; // see openFile()
     QString lastWarningMessage;
     int autoSaveDelay = 300; // in seconds, 0 to disable.
     bool modifiedAfterAutosave = false;
     bool isAutosaving = false;
     bool disregardAutosaveFailure = false;
     int autoSaveFailureCount = 0;
 
     KUndo2Stack *undoStack = 0;
 
     KisGuidesConfig guidesConfig;
     KisMirrorAxisConfig mirrorAxisConfig;
 
     bool m_bAutoDetectedMime = false; // whether the mimetype in the arguments was detected by the part itself
     QUrl m_url; // local url - the one displayed to the user.
     QString m_file; // Local file - the only one the part implementation should deal with.
 
     QMutex savingMutex;
 
     bool modified = false;
     bool readwrite = false;
 
     QDateTime firstMod;
     QDateTime lastMod;
 
     KisNameServer *nserver;
 
     KisImageSP image;
     KisImageSP savingImage;
 
     KisNodeWSP preActivatedNode;
     KisShapeController* shapeController = 0;
     KoShapeController* koShapeController = 0;
     KisIdleWatcher imageIdleWatcher;
     QScopedPointer<KisSignalAutoConnection> imageIdleConnection;
 
     QList<KisPaintingAssistantSP> assistants;
 
     QColor globalAssistantsColor;
 
-    KisSharedPtr<KisReferenceImagesLayer> referenceImagesLayer;
-
     QList<KoColorSet*> paletteList;
     bool ownsPaletteList = false;
 
     KisGridConfig gridConfig;
 
     StdLockableWrapper<QMutex> savingLock;
 
     bool modifiedWhileSaving = false;
     QScopedPointer<KisDocument> backgroundSaveDocument;
     QPointer<KoUpdater> savingUpdater;
     QFuture<KisImportExportErrorCode> childSavingFuture;
     KritaUtils::ExportFileJob backgroundSaveJob;
 
     bool isRecovered = false;
 
     bool batchMode { false };
 
     void syncDecorationsWrapperLayerState();
 
     void setImageAndInitIdleWatcher(KisImageSP _image) {
         image = _image;
 
         imageIdleWatcher.setTrackedImage(image);
 
         if (image) {
             imageIdleConnection.reset(
                         new KisSignalAutoConnection(
                             &imageIdleWatcher, SIGNAL(startedIdleMode()),
                             image.data(), SLOT(explicitRegenerateLevelOfDetail())));
         }
     }
 
     void copyFrom(const Private &rhs, KisDocument *q);
     void copyFromImpl(const Private &rhs, KisDocument *q, KisDocument::CopyPolicy policy);
 
     /// clones the palette list oldList
     /// the ownership of the returned KoColorSet * belongs to the caller
     QList<KoColorSet *> clonePaletteList(const QList<KoColorSet *> &oldList);
 
     class StrippedSafeSavingLocker;
 };
 
 
 void KisDocument::Private::syncDecorationsWrapperLayerState()
 {
     if (!this->image) return;
 
     KisImageSP image = this->image;
     KisDecorationsWrapperLayerSP decorationsLayer =
         KisLayerUtils::findNodeByType<KisDecorationsWrapperLayer>(image->root());
 
     const bool needsDecorationsWrapper =
             gridConfig.showGrid() || (guidesConfig.showGuides() && guidesConfig.hasGuides()) || !assistants.isEmpty();
 
     struct SyncDecorationsWrapperStroke : public KisSimpleStrokeStrategy {
         SyncDecorationsWrapperStroke(KisDocument *document, bool needsDecorationsWrapper)
             : KisSimpleStrokeStrategy("sync-decorations-wrapper", kundo2_noi18n("start-isolated-mode")),
               m_document(document),
               m_needsDecorationsWrapper(needsDecorationsWrapper)
         {
             this->enableJob(JOB_INIT, true, KisStrokeJobData::SEQUENTIAL, KisStrokeJobData::EXCLUSIVE);
             setClearsRedoOnStart(false);
         }
 
         void initStrokeCallback() {
             KisDecorationsWrapperLayerSP decorationsLayer =
                 KisLayerUtils::findNodeByType<KisDecorationsWrapperLayer>(m_document->image()->root());
 
             if (m_needsDecorationsWrapper && !decorationsLayer) {
                 m_document->image()->addNode(new KisDecorationsWrapperLayer(m_document));
             } else if (!m_needsDecorationsWrapper && decorationsLayer) {
                 m_document->image()->removeNode(decorationsLayer);
             }
         }
 
     private:
         KisDocument *m_document = 0;
         bool m_needsDecorationsWrapper = false;
     };
 
     KisStrokeId id = image->startStroke(new SyncDecorationsWrapperStroke(q, needsDecorationsWrapper));
     image->endStroke(id);
 }
 
 void KisDocument::Private::copyFrom(const Private &rhs, KisDocument *q)
 {
     copyFromImpl(rhs, q, KisDocument::REPLACE);
 }
 
 void KisDocument::Private::copyFromImpl(const Private &rhs, KisDocument *q, KisDocument::CopyPolicy policy)
 {
     if (policy == REPLACE) {
         delete docInfo;
     }
     docInfo = (new KoDocumentInfo(*rhs.docInfo, q));
     unit = rhs.unit;
     mimeType = rhs.mimeType;
     outputMimeType = rhs.outputMimeType;
 
     if (policy == REPLACE) {
         q->setGuidesConfig(rhs.guidesConfig);
         q->setMirrorAxisConfig(rhs.mirrorAxisConfig);
         q->setModified(rhs.modified);
         q->setAssistants(KisPaintingAssistant::cloneAssistantList(rhs.assistants));
         q->setGridConfig(rhs.gridConfig);
     } else {
         // in CONSTRUCT mode, we cannot use the functions of KisDocument
         // because KisDocument does not yet have a pointer to us.
         guidesConfig = rhs.guidesConfig;
         mirrorAxisConfig = rhs.mirrorAxisConfig;
         modified = rhs.modified;
         assistants = KisPaintingAssistant::cloneAssistantList(rhs.assistants);
         gridConfig = rhs.gridConfig;
     }
     m_bAutoDetectedMime = rhs.m_bAutoDetectedMime;
     m_url = rhs.m_url;
     m_file = rhs.m_file;
     readwrite = rhs.readwrite;
     firstMod = rhs.firstMod;
     lastMod = rhs.lastMod;
     // XXX: the display properties will be shared between different snapshots
     globalAssistantsColor = rhs.globalAssistantsColor;
 
     if (policy == REPLACE) {
         QList<KoColorSet *> newPaletteList = clonePaletteList(rhs.paletteList);
         q->setPaletteList(newPaletteList, /* emitSignal = */ true);
         // we still do not own palettes if we did not
     } else {
         paletteList = rhs.paletteList;
     }
 
     batchMode = rhs.batchMode;
 }
 
 QList<KoColorSet *> KisDocument::Private::clonePaletteList(const QList<KoColorSet *> &oldList)
 {
     QList<KoColorSet *> newList;
     Q_FOREACH (KoColorSet *palette, oldList) {
         newList << new KoColorSet(*palette);
     }
     return newList;
 }
 
 class KisDocument::Private::StrippedSafeSavingLocker {
 public:
     StrippedSafeSavingLocker(QMutex *savingMutex, KisImageSP image)
         : m_locked(false)
         , m_image(image)
         , m_savingLock(savingMutex)
         , m_imageLock(image, true)
 
     {
         /**
          * Initial try to lock both objects. Locking the image guards
          * us from any image composition threads running in the
          * background, while savingMutex guards us from entering the
          * saving code twice by autosave and main threads.
          *
          * Since we are trying to lock multiple objects, so we should
          * do it in a safe manner.
          */
         m_locked = std::try_lock(m_imageLock, m_savingLock) < 0;
 
         if (!m_locked) {
             m_image->requestStrokeEnd();
             QApplication::processEvents(QEventLoop::ExcludeUserInputEvents);
 
             // one more try...
             m_locked = std::try_lock(m_imageLock, m_savingLock) < 0;
         }
     }
 
     ~StrippedSafeSavingLocker() {
         if (m_locked) {
             m_imageLock.unlock();
             m_savingLock.unlock();
         }
     }
 
     bool successfullyLocked() const {
         return m_locked;
     }
 
 private:
     bool m_locked;
     KisImageSP m_image;
     StdLockableWrapper<QMutex> m_savingLock;
     KisImageBarrierLockAdapter m_imageLock;
 };
 
 KisDocument::KisDocument()
     : d(new Private(this))
 {
     connect(KisConfigNotifier::instance(), SIGNAL(configChanged()), SLOT(slotConfigChanged()));
     connect(d->undoStack, SIGNAL(cleanChanged(bool)), this, SLOT(slotUndoStackCleanChanged(bool)));
     connect(d->autoSaveTimer, SIGNAL(timeout()), this, SLOT(slotAutoSave()));
     setObjectName(newObjectName());
 
     // preload the krita resources
     KisResourceServerProvider::instance();
 
     d->shapeController = new KisShapeController(this, d->nserver);
     d->koShapeController = new KoShapeController(0, d->shapeController);
     d->shapeController->resourceManager()->setGlobalShapeController(d->koShapeController);
 
     slotConfigChanged();
 }
 
 KisDocument::KisDocument(const KisDocument &rhs)
     : QObject(),
       d(new Private(*rhs.d, this))
 {
     copyFromDocumentImpl(rhs, CONSTRUCT);
 }
 
 KisDocument::~KisDocument()
 {
     // wait until all the pending operations are in progress
     waitForSavingToComplete();
 
     /**
      * Push a timebomb, which will try to release the memory after
      * the document has been deleted
      */
     KisPaintDevice::createMemoryReleaseObject()->deleteLater();
 
     d->autoSaveTimer->disconnect(this);
     d->autoSaveTimer->stop();
 
     delete d->importExportManager;
 
     // Despite being QObject they needs to be deleted before the image
     delete d->shapeController;
 
     delete d->koShapeController;
 
     if (d->image) {
         d->image->notifyAboutToBeDeleted();
 
         /**
          * WARNING: We should wait for all the internal image jobs to
          * finish before entering KisImage's destructor. The problem is,
          * while execution of KisImage::~KisImage, all the weak shared
          * pointers pointing to the image enter an inconsistent
          * state(!). The shared counter is already zero and destruction
          * has started, but the weak reference doesn't know about it,
          * because KisShared::~KisShared hasn't been executed yet. So all
          * the threads running in background and having weak pointers will
          * enter the KisImage's destructor as well.
          */
 
         d->image->requestStrokeCancellation();
         d->image->waitForDone();
 
         // clear undo commands that can still point to the image
         d->undoStack->clear();
         d->image->waitForDone();
 
         KisImageWSP sanityCheckPointer = d->image;
         Q_UNUSED(sanityCheckPointer);
 
         // The following line trigger the deletion of the image
         d->image.clear();
 
         // check if the image has actually been deleted
         KIS_SAFE_ASSERT_RECOVER_NOOP(!sanityCheckPointer.isValid());
     }
 
     if (d->ownsPaletteList) {
         qDeleteAll(d->paletteList);
     }
 
     delete d;
 }
 
 bool KisDocument::reload()
 {
     // XXX: reimplement!
     return false;
 }
 
 KisDocument *KisDocument::clone()
 {
     return new KisDocument(*this);
 }
 
 bool KisDocument::exportDocumentImpl(const KritaUtils::ExportFileJob &job, KisPropertiesConfigurationSP exportConfiguration)
 {
     QFileInfo filePathInfo(job.filePath);
 
     if (filePathInfo.exists() && !filePathInfo.isWritable()) {
         slotCompleteSavingDocument(job, ImportExportCodes::NoAccessToWrite,
                                    i18n("%1 cannot be written to. Please save under a different name.", job.filePath));
         //return ImportExportCodes::NoAccessToWrite;
         return false;
     }
 
     KisConfig cfg(true);
     if (cfg.backupFile() && filePathInfo.exists()) {
 
         QString backupDir;
 
         switch(cfg.readEntry<int>("backupfilelocation", 0)) {
         case 1:
             backupDir = QStandardPaths::writableLocation(QStandardPaths::HomeLocation);
             break;
         case 2:
             backupDir = QStandardPaths::writableLocation(QStandardPaths::TempLocation);
             break;
         default:
             // Do nothing: the empty string is user file location
             break;
         }
 
         int numOfBackupsKept = cfg.readEntry<int>("numberofbackupfiles", 1);
         QString suffix = cfg.readEntry<QString>("backupfilesuffix", "~");
 
         if (numOfBackupsKept == 1) {
             KBackup::simpleBackupFile(job.filePath, backupDir, suffix);
         }
         else if (numOfBackupsKept > 2) {
             KBackup::numberedBackupFile(job.filePath, backupDir, suffix, numOfBackupsKept);
         }
     }
 
     //KIS_SAFE_ASSERT_RECOVER_RETURN_VALUE(!job.mimeType.isEmpty(), false);
     if (job.mimeType.isEmpty()) {
 
         KisImportExportErrorCode error = ImportExportCodes::FileFormatIncorrect;
         slotCompleteSavingDocument(job, error, error.errorMessage());
         return false;
 
     }
 
     const QString actionName =
         job.flags & KritaUtils::SaveIsExporting ?
         i18n("Exporting Document...") :
         i18n("Saving Document...");
 
     bool started =
         initiateSavingInBackground(actionName,
                                    this, SLOT(slotCompleteSavingDocument(KritaUtils::ExportFileJob, KisImportExportErrorCode ,QString)),
                                    job, exportConfiguration);
     if (!started) {
         emit canceled(QString());
     }
 
     return started;
 }
 
 bool KisDocument::exportDocument(const QUrl &url, const QByteArray &mimeType, bool showWarnings, KisPropertiesConfigurationSP exportConfiguration)
 {
     using namespace KritaUtils;
 
     SaveFlags flags = SaveIsExporting;
     if (showWarnings) {
         flags |= SaveShowWarnings;
     }
 
     KisUsageLogger::log(QString("Exporting Document: %1 as %2. %3 * %4 pixels, %5 layers, %6 frames, %7 framerate. Export configuration: %8")
                         .arg(url.toLocalFile())
                         .arg(QString::fromLatin1(mimeType))
                         .arg(d->image->width())
                         .arg(d->image->height())
                         .arg(d->image->nlayers())
                         .arg(d->image->animationInterface()->totalLength())
                         .arg(d->image->animationInterface()->framerate())
                         .arg(exportConfiguration ? exportConfiguration->toXML() : "No configuration"));
 
     return exportDocumentImpl(KritaUtils::ExportFileJob(url.toLocalFile(),
                                                         mimeType,
                                                         flags),
                               exportConfiguration);
 
 }
 
 bool KisDocument::saveAs(const QUrl &_url, const QByteArray &mimeType, bool showWarnings, KisPropertiesConfigurationSP exportConfiguration)
 {
     using namespace KritaUtils;
 
     KisUsageLogger::log(QString("Saving Document %9 as %1 (mime: %2). %3 * %4 pixels, %5 layers.  %6 frames, %7 framerate. Export configuration: %8")
                         .arg(_url.toLocalFile())
                         .arg(QString::fromLatin1(mimeType))
                         .arg(d->image->width())
                         .arg(d->image->height())
                         .arg(d->image->nlayers())
                         .arg(d->image->animationInterface()->totalLength())
                         .arg(d->image->animationInterface()->framerate())
                         .arg(exportConfiguration ? exportConfiguration->toXML() : "No configuration")
                         .arg(url().toLocalFile()));
 
 
     return exportDocumentImpl(ExportFileJob(_url.toLocalFile(),
                                             mimeType,
                                             showWarnings ? SaveShowWarnings : SaveNone),
                               exportConfiguration);
 }
 
 bool KisDocument::save(bool showWarnings, KisPropertiesConfigurationSP exportConfiguration)
 {
     return saveAs(url(), mimeType(), showWarnings, exportConfiguration);
 }
 
 QByteArray KisDocument::serializeToNativeByteArray()
 {
     QByteArray byteArray;
     QBuffer buffer(&byteArray);
 
     QScopedPointer<KisImportExportFilter> filter(KisImportExportManager::filterForMimeType(nativeFormatMimeType(), KisImportExportManager::Export));
     filter->setBatchMode(true);
     filter->setMimeType(nativeFormatMimeType());
 
     Private::StrippedSafeSavingLocker locker(&d->savingMutex, d->image);
     if (!locker.successfullyLocked()) {
         return byteArray;
     }
 
     d->savingImage = d->image;
 
     if (!filter->convert(this, &buffer).isOk()) {
         qWarning() << "serializeToByteArray():: Could not export to our native format";
     }
 
     return byteArray;
 }
 
 void KisDocument::slotCompleteSavingDocument(const KritaUtils::ExportFileJob &job, KisImportExportErrorCode status, const QString &errorMessage)
 {
     if (status.isCancelled())
         return;
 
     const QString fileName = QFileInfo(job.filePath).fileName();
 
     if (!status.isOk()) {
         emit statusBarMessage(i18nc("%1 --- failing file name, %2 --- error message",
                                     "Error during saving %1: %2",
                                     fileName,
                                     exportErrorToUserMessage(status, errorMessage)), errorMessageTimeout);
 
         if (!fileBatchMode()) {
             const QString filePath = job.filePath;
             QMessageBox::critical(0, i18nc("@title:window", "Krita"), i18n("Could not save %1\nReason: %2", filePath, exportErrorToUserMessage(status, errorMessage)));
         }
     } else {
         if (!(job.flags & KritaUtils::SaveIsExporting)) {
             const QString existingAutoSaveBaseName = localFilePath();
             const bool wasRecovered = isRecovered();
 
             setUrl(QUrl::fromLocalFile(job.filePath));
             setLocalFilePath(job.filePath);
             setMimeType(job.mimeType);
             updateEditingTime(true);
 
             if (!d->modifiedWhileSaving) {
                 /**
                  * If undo stack is already clean/empty, it doesn't emit any
                  * signals, so we might forget update document modified state
                  * (which was set, e.g. while recovering an autosave file)
                  */
 
                 if (d->undoStack->isClean()) {
                     setModified(false);
                 } else {
                     d->undoStack->setClean();
                 }
             }
             setRecovered(false);
             removeAutoSaveFiles(existingAutoSaveBaseName, wasRecovered);
         }
 
         emit completed();
         emit sigSavingFinished();
 
         emit statusBarMessage(i18n("Finished saving %1", fileName), successMessageTimeout);
     }
 }
 
 QByteArray KisDocument::mimeType() const
 {
     return d->mimeType;
 }
 
 void KisDocument::setMimeType(const QByteArray & mimeType)
 {
     d->mimeType = mimeType;
 }
 
 bool KisDocument::fileBatchMode() const
 {
     return d->batchMode;
 }
 
 void KisDocument::setFileBatchMode(const bool batchMode)
 {
     d->batchMode = batchMode;
 }
 
 KisDocument* KisDocument::lockAndCloneForSaving()
 {
     // force update of all the asynchronous nodes before cloning
     QApplication::processEvents(QEventLoop::ExcludeUserInputEvents);
     KisLayerUtils::forceAllDelayedNodesUpdate(d->image->root());
 
     KisMainWindow *window = KisPart::instance()->currentMainwindow();
     if (window) {
         if (window->viewManager()) {
             if (!window->viewManager()->blockUntilOperationsFinished(d->image)) {
                 return 0;
             }
         }
     }
 
     Private::StrippedSafeSavingLocker locker(&d->savingMutex, d->image);
     if (!locker.successfullyLocked()) {
         return 0;
     }
 
     return new KisDocument(*this);
 }
 
 KisDocument *KisDocument::lockAndCreateSnapshot()
 {
     KisDocument *doc = lockAndCloneForSaving();
     if (doc) {
         // clone palette list
         doc->d->paletteList = doc->d->clonePaletteList(doc->d->paletteList);
         doc->d->ownsPaletteList = true;
     }
     return doc;
 }
 
 void KisDocument::copyFromDocument(const KisDocument &rhs)
 {
     copyFromDocumentImpl(rhs, REPLACE);
 }
 
 void KisDocument::copyFromDocumentImpl(const KisDocument &rhs, CopyPolicy policy)
 {
     if (policy == REPLACE) {
         d->copyFrom(*(rhs.d), this);
 
         d->undoStack->clear();
     } else {
         // in CONSTRUCT mode, d should be already initialized
         connect(KisConfigNotifier::instance(), SIGNAL(configChanged()), SLOT(slotConfigChanged()));
         connect(d->undoStack, SIGNAL(cleanChanged(bool)), this, SLOT(slotUndoStackCleanChanged(bool)));
         connect(d->autoSaveTimer, SIGNAL(timeout()), this, SLOT(slotAutoSave()));
 
         d->shapeController = new KisShapeController(this, d->nserver);
         d->koShapeController = new KoShapeController(0, d->shapeController);
         d->shapeController->resourceManager()->setGlobalShapeController(d->koShapeController);
     }
 
     setObjectName(rhs.objectName());
 
     slotConfigChanged();
 
     if (rhs.d->image) {
         if (policy == REPLACE) {
             d->image->barrierLock(/* readOnly = */ false);
             rhs.d->image->barrierLock(/* readOnly = */ true);
             d->image->copyFromImage(*(rhs.d->image));
             d->image->unlock();
             rhs.d->image->unlock();
             setCurrentImage(d->image, /* forceInitialUpdate = */ true);
         } else {
             // clone the image with keeping the GUIDs of the layers intact
             // NOTE: we expect the image to be locked!
             setCurrentImage(rhs.image()->clone(/* exactCopy = */ true), /* forceInitialUpdate = */ false);
         }
     }
 
     if (rhs.d->preActivatedNode) {
         QQueue<KisNodeSP> linearizedNodes;
         KisLayerUtils::recursiveApplyNodes(rhs.d->image->root(),
                                            [&linearizedNodes](KisNodeSP node) {
                                                linearizedNodes.enqueue(node);
                                            });
         KisLayerUtils::recursiveApplyNodes(d->image->root(),
                                            [&linearizedNodes, &rhs, this](KisNodeSP node) {
                                                KisNodeSP refNode = linearizedNodes.dequeue();
                                                if (rhs.d->preActivatedNode.data() == refNode.data()) {
                                                    d->preActivatedNode = node;
                                                }
                                            });
     }
 
-    KisNodeSP foundNode = KisLayerUtils::recursiveFindNode(image()->rootLayer(), [](KisNodeSP node) -> bool { return dynamic_cast<KisReferenceImagesLayer *>(node.data()); });
-    KisReferenceImagesLayer *refLayer = dynamic_cast<KisReferenceImagesLayer *>(foundNode.data());
-    setReferenceImagesLayer(refLayer, /* updateImage = */ false);
+    // reinitialize references' signal connection
+    KisReferenceImagesLayerSP referencesLayer = this->referenceImagesLayer();
+    setReferenceImagesLayer(referencesLayer, false);
 
     KisDecorationsWrapperLayerSP decorationsLayer =
         KisLayerUtils::findNodeByType<KisDecorationsWrapperLayer>(d->image->root());
     if (decorationsLayer) {
         decorationsLayer->setDocument(this);
     }
 
 
     if (policy == REPLACE) {
         setModified(true);
     }
 }
 
 bool KisDocument::exportDocumentSync(const QUrl &url, const QByteArray &mimeType, KisPropertiesConfigurationSP exportConfiguration)
 {
     {
 
         /**
          * The caller guarantees that noone else uses the document (usually,
          * it is a temporary docuent created specifically for exporting), so
          * we don't need to copy or lock the document. Instead we should just
          * ensure the barrier lock is synced and then released.
          */
         Private::StrippedSafeSavingLocker locker(&d->savingMutex, d->image);
         if (!locker.successfullyLocked()) {
             return false;
         }
     }
 
     d->savingImage = d->image;
 
     const QString fileName = url.toLocalFile();
 
     KisImportExportErrorCode status =
             d->importExportManager->
             exportDocument(fileName, fileName, mimeType, false, exportConfiguration);
 
     d->savingImage = 0;
 
     return status.isOk();
 }
 
 bool KisDocument::initiateSavingInBackground(const QString actionName,
                                              const QObject *receiverObject, const char *receiverMethod,
                                              const KritaUtils::ExportFileJob &job,
                                              KisPropertiesConfigurationSP exportConfiguration)
 {
     return initiateSavingInBackground(actionName, receiverObject, receiverMethod,
                                       job, exportConfiguration, std::unique_ptr<KisDocument>());
 }
 
 bool KisDocument::initiateSavingInBackground(const QString actionName,
                                              const QObject *receiverObject, const char *receiverMethod,
                                              const KritaUtils::ExportFileJob &job,
                                              KisPropertiesConfigurationSP exportConfiguration,
                                              std::unique_ptr<KisDocument> &&optionalClonedDocument)
 {
     KIS_ASSERT_RECOVER_RETURN_VALUE(job.isValid(), false);
 
     QScopedPointer<KisDocument> clonedDocument;
 
     if (!optionalClonedDocument) {
         clonedDocument.reset(lockAndCloneForSaving());
     } else {
         clonedDocument.reset(optionalClonedDocument.release());
     }
 
     // we block saving until the current saving is finished!
     if (!clonedDocument || !d->savingMutex.tryLock()) {
         return false;
     }
 
     auto waitForImage = [] (KisImageSP image) {
         KisMainWindow *window = KisPart::instance()->currentMainwindow();
         if (window) {
             if (window->viewManager()) {
                 window->viewManager()->blockUntilOperationsFinishedForced(image);
             }
         }
     };
 
     {
         KisNodeSP newRoot = clonedDocument->image()->root();
         KIS_SAFE_ASSERT_RECOVER(!KisLayerUtils::hasDelayedNodeWithUpdates(newRoot)) {
             KisLayerUtils::forceAllDelayedNodesUpdate(newRoot);
             waitForImage(clonedDocument->image());
         }
     }
 
     KIS_SAFE_ASSERT_RECOVER(clonedDocument->image()->isIdle()) {
         waitForImage(clonedDocument->image());
     }
 
     KIS_ASSERT_RECOVER_RETURN_VALUE(!d->backgroundSaveDocument, false);
     KIS_ASSERT_RECOVER_RETURN_VALUE(!d->backgroundSaveJob.isValid(), false);
     d->backgroundSaveDocument.reset(clonedDocument.take());
     d->backgroundSaveJob = job;
     d->modifiedWhileSaving = false;
 
     if (d->backgroundSaveJob.flags & KritaUtils::SaveInAutosaveMode) {
         d->backgroundSaveDocument->d->isAutosaving = true;
     }
 
     connect(d->backgroundSaveDocument.data(),
             SIGNAL(sigBackgroundSavingFinished(KisImportExportErrorCode, QString)),
             this,
             SLOT(slotChildCompletedSavingInBackground(KisImportExportErrorCode, QString)));
 
 
     connect(this, SIGNAL(sigCompleteBackgroundSaving(KritaUtils::ExportFileJob, KisImportExportErrorCode, QString)),
             receiverObject, receiverMethod, Qt::UniqueConnection);
 
     bool started =
             d->backgroundSaveDocument->startExportInBackground(actionName,
                                                                job.filePath,
                                                                job.filePath,
                                                                job.mimeType,
                                                                job.flags & KritaUtils::SaveShowWarnings,
                                                                exportConfiguration);
 
     if (!started) {
         // the state should have been deinitialized in slotChildCompletedSavingInBackground()
 
         KIS_SAFE_ASSERT_RECOVER (!d->backgroundSaveDocument && !d->backgroundSaveJob.isValid()) {
             d->backgroundSaveDocument.take()->deleteLater();
             d->savingMutex.unlock();
             d->backgroundSaveJob = KritaUtils::ExportFileJob();
         }
     }
 
     return started;
 }
 
 
 void KisDocument::slotChildCompletedSavingInBackground(KisImportExportErrorCode status, const QString &errorMessage)
 {
     KIS_ASSERT_RECOVER_RETURN(isSaving());
 
     KIS_ASSERT_RECOVER(d->backgroundSaveDocument) {
         d->savingMutex.unlock();
         return;
     }
 
     if (d->backgroundSaveJob.flags & KritaUtils::SaveInAutosaveMode) {
         d->backgroundSaveDocument->d->isAutosaving = false;
     }
 
     d->backgroundSaveDocument.take()->deleteLater();
 
     KIS_ASSERT_RECOVER(d->backgroundSaveJob.isValid()) {
         d->savingMutex.unlock();
         return;
     }
 
     const KritaUtils::ExportFileJob job = d->backgroundSaveJob;
     d->backgroundSaveJob = KritaUtils::ExportFileJob();
 
     // unlock at the very end
     d->savingMutex.unlock();
 
     KisUsageLogger::log(QString("Completed saving %1 (mime: %2). Result: %3")
                         .arg(job.filePath)
                         .arg(QString::fromLatin1(job.mimeType))
                         .arg(!status.isOk() ? exportErrorToUserMessage(status, errorMessage) : "OK"));
 
     emit sigCompleteBackgroundSaving(job, status, errorMessage);
 }
 
 void KisDocument::slotAutoSaveImpl(std::unique_ptr<KisDocument> &&optionalClonedDocument)
 {
     if (!d->modified || !d->modifiedAfterAutosave) return;
     const QString autoSaveFileName = generateAutoSaveFileName(localFilePath());
 
     emit statusBarMessage(i18n("Autosaving... %1", autoSaveFileName), successMessageTimeout);
 
     const bool hadClonedDocument = bool(optionalClonedDocument);
     bool started = false;
 
     if (d->image->isIdle() || hadClonedDocument) {
         started = initiateSavingInBackground(i18n("Autosaving..."),
                                              this, SLOT(slotCompleteAutoSaving(KritaUtils::ExportFileJob, KisImportExportErrorCode, QString)),
                                              KritaUtils::ExportFileJob(autoSaveFileName, nativeFormatMimeType(), KritaUtils::SaveIsExporting | KritaUtils::SaveInAutosaveMode),
                                              0,
                                              std::move(optionalClonedDocument));
     } else {
         emit statusBarMessage(i18n("Autosaving postponed: document is busy..."), errorMessageTimeout);
     }
 
     if (!started && !hadClonedDocument && d->autoSaveFailureCount >= 3) {
         KisCloneDocumentStroke *stroke = new KisCloneDocumentStroke(this);
         connect(stroke, SIGNAL(sigDocumentCloned(KisDocument*)),
                 this, SLOT(slotInitiateAsyncAutosaving(KisDocument*)),
                 Qt::BlockingQueuedConnection);
 
         KisStrokeId strokeId = d->image->startStroke(stroke);
         d->image->endStroke(strokeId);
 
         setInfiniteAutoSaveInterval();
 
     } else if (!started) {
         setEmergencyAutoSaveInterval();
     } else {
         d->modifiedAfterAutosave = false;
     }
 }
 
 void KisDocument::slotAutoSave()
 {
     slotAutoSaveImpl(std::unique_ptr<KisDocument>());
 }
 
 void KisDocument::slotInitiateAsyncAutosaving(KisDocument *clonedDocument)
 {
     slotAutoSaveImpl(std::unique_ptr<KisDocument>(clonedDocument));
 }
 
 void KisDocument::slotCompleteAutoSaving(const KritaUtils::ExportFileJob &job, KisImportExportErrorCode status, const QString &errorMessage)
 {
     Q_UNUSED(job);
 
     const QString fileName = QFileInfo(job.filePath).fileName();
 
     if (!status.isOk()) {
         setEmergencyAutoSaveInterval();
         emit statusBarMessage(i18nc("%1 --- failing file name, %2 --- error message",
                                     "Error during autosaving %1: %2",
                                     fileName,
                                     exportErrorToUserMessage(status, errorMessage)), errorMessageTimeout);
     } else {
         KisConfig cfg(true);
         d->autoSaveDelay = cfg.autoSaveInterval();
 
         if (!d->modifiedWhileSaving) {
             d->autoSaveTimer->stop(); // until the next change
             d->autoSaveFailureCount = 0;
         } else {
             setNormalAutoSaveInterval();
         }
 
         emit statusBarMessage(i18n("Finished autosaving %1", fileName), successMessageTimeout);
     }
 }
 
 bool KisDocument::startExportInBackground(const QString &actionName,
                                           const QString &location,
                                           const QString &realLocation,
                                           const QByteArray &mimeType,
                                           bool showWarnings,
                                           KisPropertiesConfigurationSP exportConfiguration)
 {
     d->savingImage = d->image;
 
     KisMainWindow *window = KisPart::instance()->currentMainwindow();
     if (window) {
         if (window->viewManager()) {
             d->savingUpdater = window->viewManager()->createThreadedUpdater(actionName);
             d->importExportManager->setUpdater(d->savingUpdater);
         }
     }
 
     KisImportExportErrorCode initializationStatus(ImportExportCodes::OK);
     d->childSavingFuture =
             d->importExportManager->exportDocumentAsyc(location,
                                                        realLocation,
                                                        mimeType,
                                                        initializationStatus,
                                                        showWarnings,
                                                        exportConfiguration);
 
     if (!initializationStatus.isOk()) {
         if (d->savingUpdater) {
             d->savingUpdater->cancel();
         }
         d->savingImage.clear();
         emit sigBackgroundSavingFinished(initializationStatus, initializationStatus.errorMessage());
         return false;
     }
 
     typedef QFutureWatcher<KisImportExportErrorCode> StatusWatcher;
     StatusWatcher *watcher = new StatusWatcher();
     watcher->setFuture(d->childSavingFuture);
 
     connect(watcher, SIGNAL(finished()), SLOT(finishExportInBackground()));
     connect(watcher, SIGNAL(finished()), watcher, SLOT(deleteLater()));
 
     return true;
 }
 
 void KisDocument::finishExportInBackground()
 {
     KIS_SAFE_ASSERT_RECOVER(d->childSavingFuture.isFinished()) {
         emit sigBackgroundSavingFinished(ImportExportCodes::InternalError, "");
         return;
     }
 
    KisImportExportErrorCode status =
             d->childSavingFuture.result();
     const QString errorMessage = status.errorMessage();
 
     d->savingImage.clear();
     d->childSavingFuture = QFuture<KisImportExportErrorCode>();
     d->lastErrorMessage.clear();
 
     if (d->savingUpdater) {
         d->savingUpdater->setProgress(100);
     }
 
     emit sigBackgroundSavingFinished(status, errorMessage);
 }
 
 void KisDocument::setReadWrite(bool readwrite)
 {
     d->readwrite = readwrite;
     setNormalAutoSaveInterval();
 
     Q_FOREACH (KisMainWindow *mainWindow, KisPart::instance()->mainWindows()) {
         mainWindow->setReadWrite(readwrite);
     }
 }
 
 void KisDocument::setAutoSaveDelay(int delay)
 {
     if (isReadWrite() && delay > 0) {
         d->autoSaveTimer->start(delay * 1000);
     } else {
         d->autoSaveTimer->stop();
     }
 }
 
 void KisDocument::setNormalAutoSaveInterval()
 {
     setAutoSaveDelay(d->autoSaveDelay);
     d->autoSaveFailureCount = 0;
 }
 
 void KisDocument::setEmergencyAutoSaveInterval()
 {
     const int emergencyAutoSaveInterval = 10; /* sec */
     setAutoSaveDelay(emergencyAutoSaveInterval);
     d->autoSaveFailureCount++;
 }
 
 void KisDocument::setInfiniteAutoSaveInterval()
 {
     setAutoSaveDelay(-1);
 }
 
 KoDocumentInfo *KisDocument::documentInfo() const
 {
     return d->docInfo;
 }
 
 bool KisDocument::isModified() const
 {
     return d->modified;
 }
 
 QPixmap KisDocument::generatePreview(const QSize& size)
 {
     KisImageSP image = d->image;
     if (d->savingImage) image = d->savingImage;
 
     if (image) {
         QRect bounds = image->bounds();
         QSize newSize = bounds.size();
         newSize.scale(size, Qt::KeepAspectRatio);
         QPixmap px = QPixmap::fromImage(image->convertToQImage(newSize, 0));
         if (px.size() == QSize(0,0)) {
             px = QPixmap(newSize);
             QPainter gc(&px);
             QBrush checkBrush = QBrush(KisCanvasWidgetBase::createCheckersImage(newSize.width() / 5));
             gc.fillRect(px.rect(), checkBrush);
             gc.end();
         }
         return px;
     }
     return QPixmap(size);
 }
 
 QString KisDocument::generateAutoSaveFileName(const QString & path) const
 {
     QString retval;
 
     // Using the extension allows to avoid relying on the mime magic when opening
     const QString extension (".kra");
     QString prefix = KisConfig(true).readEntry<bool>("autosavefileshidden") ? QString(".") : QString();
     QRegularExpression autosavePattern1("^\\..+-autosave.kra$");
     QRegularExpression autosavePattern2("^.+-autosave.kra$");
 
     QFileInfo fi(path);
     QString dir = fi.absolutePath();
     QString filename = fi.fileName();
 
     if (path.isEmpty() || autosavePattern1.match(filename).hasMatch() || autosavePattern2.match(filename).hasMatch() || !fi.isWritable()) {
         // Never saved?
 #ifdef Q_OS_WIN
         // On Windows, use the temp location (https://bugs.kde.org/show_bug.cgi?id=314921)
         retval = QString("%1%2%7%3-%4-%5-autosave%6").arg(QDir::tempPath()).arg(QDir::separator()).arg("krita").arg(qApp->applicationPid()).arg(objectName()).arg(extension).arg(prefix);
 #else
         // On Linux, use a temp file in $HOME then. Mark it with the pid so two instances don't overwrite each other's autosave file
         retval = QString("%1%2%7%3-%4-%5-autosave%6").arg(QDir::homePath()).arg(QDir::separator()).arg("krita").arg(qApp->applicationPid()).arg(objectName()).arg(extension).arg(prefix);
 #endif
     } else {
         retval = QString("%1%2%5%3-autosave%4").arg(dir).arg(QDir::separator()).arg(filename).arg(extension).arg(prefix);
     }
 
     //qDebug() << "generateAutoSaveFileName() for path" << path << ":" << retval;
     return retval;
 }
 
 bool KisDocument::importDocument(const QUrl &_url)
 {
     bool ret;
 
     dbgUI << "url=" << _url.url();
 
     // open...
     ret = openUrl(_url);
 
     // reset url & m_file (kindly? set by KisParts::openUrl()) to simulate a
     // File --> Import
     if (ret) {
         dbgUI << "success, resetting url";
         resetURL();
         setTitleModified();
     }
 
     return ret;
 }
 
 
 bool KisDocument::openUrl(const QUrl &_url, OpenFlags flags)
 {
     if (!_url.isLocalFile()) {
         return false;
     }
     dbgUI << "url=" << _url.url();
     d->lastErrorMessage.clear();
 
     // Reimplemented, to add a check for autosave files and to improve error reporting
     if (!_url.isValid()) {
         d->lastErrorMessage = i18n("Malformed URL\n%1", _url.url());  // ## used anywhere ?
         return false;
     }
 
     QUrl url(_url);
     bool autosaveOpened = false;
     if (url.isLocalFile() && !fileBatchMode()) {
         QString file = url.toLocalFile();
         QString asf = generateAutoSaveFileName(file);
         if (QFile::exists(asf)) {
             KisApplication *kisApp = static_cast<KisApplication*>(qApp);
             kisApp->hideSplashScreen();
             //dbgUI <<"asf=" << asf;
             // ## TODO compare timestamps ?
             int res = QMessageBox::warning(0,
                                            i18nc("@title:window", "Krita"),
                                            i18n("An autosaved file exists for this document.\nDo you want to open the autosaved file instead?"),
                                            QMessageBox::Yes | QMessageBox::No | QMessageBox::Cancel, QMessageBox::Yes);
             switch (res) {
             case QMessageBox::Yes :
                 url.setPath(asf);
                 autosaveOpened = true;
                 break;
             case QMessageBox::No :
                 QFile::remove(asf);
                 break;
             default: // Cancel
                 return false;
             }
         }
     }
 
     bool ret = openUrlInternal(url);
 
     if (autosaveOpened || flags & RecoveryFile) {
         setReadWrite(true); // enable save button
         setModified(true);
         setRecovered(true);
     }
     else {
         if (ret) {
 
             if (!(flags & DontAddToRecent)) {
                 KisPart::instance()->addRecentURLToAllMainWindows(_url);
             }
 
             // Detect readonly local-files; remote files are assumed to be writable
             QFileInfo fi(url.toLocalFile());
             setReadWrite(fi.isWritable());
         }
 
         setRecovered(false);
     }
 
     return ret;
 }
 
 class DlgLoadMessages : public KoDialog {
 public:
     DlgLoadMessages(const QString &title, const QString &message, const QStringList &warnings) {
         setWindowTitle(title);
         setWindowIcon(KisIconUtils::loadIcon("warning"));
         QWidget *page = new QWidget(this);
         QVBoxLayout *layout = new QVBoxLayout(page);
         QHBoxLayout *hlayout = new QHBoxLayout();
         QLabel *labelWarning= new QLabel();
         labelWarning->setPixmap(KisIconUtils::loadIcon("warning").pixmap(32, 32));
         hlayout->addWidget(labelWarning);
         hlayout->addWidget(new QLabel(message));
         layout->addLayout(hlayout);
         QTextBrowser *browser = new QTextBrowser();
         QString warning = "<html><body><p><b>";
         if (warnings.size() == 1) {
             warning += "</b> Reason:</p>";
         }
         else {
             warning += "</b> Reasons:</p>";
         }
         warning += "<p/><ul>";
 
         Q_FOREACH(const QString &w, warnings) {
             warning += "\n<li>" + w + "</li>";
         }
         warning += "</ul>";
         browser->setHtml(warning);
         browser->setMinimumHeight(200);
         browser->setMinimumWidth(400);
         layout->addWidget(browser);
         setMainWidget(page);
         setButtons(KoDialog::Ok);
         resize(minimumSize());
     }
 };
 
 bool KisDocument::openFile()
 {
     //dbgUI <<"for" << localFilePath();
     if (!QFile::exists(localFilePath()) && !fileBatchMode()) {
         QMessageBox::critical(0, i18nc("@title:window", "Krita"), i18n("File %1 does not exist.", localFilePath()));
         return false;
     }
 
     QString filename = localFilePath();
     QString typeName = mimeType();
 
     if (typeName.isEmpty()) {
         typeName = KisMimeDatabase::mimeTypeForFile(filename);
     }
 
     //qDebug() << "mimetypes 4:" << typeName;
 
     // Allow to open backup files, don't keep the mimetype application/x-trash.
     if (typeName == "application/x-trash") {
         QString path = filename;
         while (path.length() > 0) {
             path.chop(1);
             typeName = KisMimeDatabase::mimeTypeForFile(path);
             //qDebug() << "\t" << path << typeName;
             if (!typeName.isEmpty()) {
                 break;
             }
         }
         //qDebug() << "chopped" << filename  << "to" << path << "Was trash, is" << typeName;
     }
     dbgUI << localFilePath() << "type:" << typeName;
 
     KisMainWindow *window = KisPart::instance()->currentMainwindow();
     KoUpdaterPtr updater;
     if (window && window->viewManager()) {
         updater = window->viewManager()->createUnthreadedUpdater(i18n("Opening document"));
         d->importExportManager->setUpdater(updater);
     }
 
     KisImportExportErrorCode status = d->importExportManager->importDocument(localFilePath(), typeName);
 
     if (!status.isOk()) {
         if (window && window->viewManager()) {
             updater->cancel();
         }
         QString msg = status.errorMessage();
         if (!msg.isEmpty() && !fileBatchMode()) {
             DlgLoadMessages dlg(i18nc("@title:window", "Krita"),
                                 i18n("Could not open %2.\nReason: %1.", msg, prettyPathOrUrl()),
                                 errorMessage().split("\n") + warningMessage().split("\n"));
             dlg.exec();
         }
         return false;
     }
     else if (!warningMessage().isEmpty() && !fileBatchMode()) {
         DlgLoadMessages dlg(i18nc("@title:window", "Krita"),
                             i18n("There were problems opening %1.", prettyPathOrUrl()),
                             warningMessage().split("\n"));
         dlg.exec();
         setUrl(QUrl());
     }
 
     setMimeTypeAfterLoading(typeName);
     d->syncDecorationsWrapperLayerState();
     emit sigLoadingFinished();
 
     undoStack()->clear();
 
     return true;
 }
 
 // shared between openFile and koMainWindow's "create new empty document" code
 void KisDocument::setMimeTypeAfterLoading(const QString& mimeType)
 {
     d->mimeType = mimeType.toLatin1();
     d->outputMimeType = d->mimeType;
 }
 
 
 bool KisDocument::loadNativeFormat(const QString & file_)
 {
     return openUrl(QUrl::fromLocalFile(file_));
 }
 
 void KisDocument::setModified(bool mod)
 {
     if (mod) {
         updateEditingTime(false);
     }
 
     if (d->isAutosaving)   // ignore setModified calls due to autosaving
         return;
 
     if ( !d->readwrite && d->modified ) {
         errKrita << "Can't set a read-only document to 'modified' !" << endl;
         return;
     }
 
     //dbgUI<<" url:" << url.path();
     //dbgUI<<" mod="<<mod<<" MParts mod="<<KisParts::ReadWritePart::isModified()<<" isModified="<<isModified();
 
     if (mod && !d->autoSaveTimer->isActive()) {
         // First change since last autosave -> start the autosave timer
         setNormalAutoSaveInterval();
     }
     d->modifiedAfterAutosave = mod;
     d->modifiedWhileSaving = mod;
 
     if (mod == isModified())
         return;
 
     d->modified = mod;
 
     if (mod) {
         documentInfo()->updateParameters();
     }
 
     // This influences the title
     setTitleModified();
     emit modified(mod);
 }
 
 void KisDocument::setRecovered(bool value)
 {
     d->isRecovered = value;
 }
 
 bool KisDocument::isRecovered() const
 {
     return d->isRecovered;
 }
 
 void KisDocument::updateEditingTime(bool forceStoreElapsed)
 {
     QDateTime now = QDateTime::currentDateTime();
     int firstModDelta = d->firstMod.secsTo(now);
     int lastModDelta = d->lastMod.secsTo(now);
 
     if (lastModDelta > 30) {
         d->docInfo->setAboutInfo("editing-time", QString::number(d->docInfo->aboutInfo("editing-time").toInt() + d->firstMod.secsTo(d->lastMod)));
         d->firstMod = now;
     } else if (firstModDelta > 60 || forceStoreElapsed) {
         d->docInfo->setAboutInfo("editing-time", QString::number(d->docInfo->aboutInfo("editing-time").toInt() + firstModDelta));
         d->firstMod = now;
     }
 
     d->lastMod = now;
 }
 
 QString KisDocument::prettyPathOrUrl() const
 {
     QString _url(url().toDisplayString());
 #ifdef Q_OS_WIN
     if (url().isLocalFile()) {
         _url = QDir::toNativeSeparators(_url);
     }
 #endif
     return _url;
 }
 
 // Get caption from document info (title(), in about page)
 QString KisDocument::caption() const
 {
     QString c;
     const QString _url(url().fileName());
 
     // if URL is empty...it is probably an unsaved file
     if (_url.isEmpty()) {
         c = " [" + i18n("Not Saved") + "] ";
     } else {
         c = _url; // Fall back to document URL
     }
 
     return c;
 }
 
 void KisDocument::setTitleModified()
 {
     emit titleModified(caption(), isModified());
 }
 
 QDomDocument KisDocument::createDomDocument(const QString& tagName, const QString& version) const
 {
     return createDomDocument("krita", tagName, version);
 }
 
 //static
 QDomDocument KisDocument::createDomDocument(const QString& appName, const QString& tagName, const QString& version)
 {
     QDomImplementation impl;
     QString url = QString("http://www.calligra.org/DTD/%1-%2.dtd").arg(appName).arg(version);
     QDomDocumentType dtype = impl.createDocumentType(tagName,
                                                      QString("-//KDE//DTD %1 %2//EN").arg(appName).arg(version),
                                                      url);
     // The namespace URN doesn't need to include the version number.
     QString namespaceURN = QString("http://www.calligra.org/DTD/%1").arg(appName);
     QDomDocument doc = impl.createDocument(namespaceURN, tagName, dtype);
     doc.insertBefore(doc.createProcessingInstruction("xml", "version=\"1.0\" encoding=\"UTF-8\""), doc.documentElement());
     return doc;
 }
 
 bool KisDocument::isNativeFormat(const QByteArray& mimetype) const
 {
     if (mimetype == nativeFormatMimeType())
         return true;
     return extraNativeMimeTypes().contains(mimetype);
 }
 
 void KisDocument::setErrorMessage(const QString& errMsg)
 {
     d->lastErrorMessage = errMsg;
 }
 
 QString KisDocument::errorMessage() const
 {
     return d->lastErrorMessage;
 }
 
 void KisDocument::setWarningMessage(const QString& warningMsg)
 {
     d->lastWarningMessage = warningMsg;
 }
 
 QString KisDocument::warningMessage() const
 {
     return d->lastWarningMessage;
 }
 
 
 void KisDocument::removeAutoSaveFiles(const QString &autosaveBaseName, bool wasRecovered)
 {
     //qDebug() << "removeAutoSaveFiles";
     // Eliminate any auto-save file
     QString asf = generateAutoSaveFileName(autosaveBaseName);   // the one in the current dir
 
     //qDebug() << "\tfilename:" << asf << "exists:" << QFile::exists(asf);
     if (QFile::exists(asf)) {
         //qDebug() << "\tremoving autosavefile" << asf;
         QFile::remove(asf);
     }
     asf = generateAutoSaveFileName(QString());   // and the one in $HOME
 
     //qDebug() << "Autsavefile in $home" << asf;
     if (QFile::exists(asf)) {
         //qDebug() << "\tremoving autsavefile 2" << asf;
         QFile::remove(asf);
     }
 
     QList<QRegularExpression> expressions;
 
     expressions << QRegularExpression("^\\..+-autosave.kra$")
                 << QRegularExpression("^.+-autosave.kra$");
 
     Q_FOREACH(const QRegularExpression &rex, expressions) {
         if (wasRecovered &&
                 !autosaveBaseName.isEmpty() &&
                 rex.match(QFileInfo(autosaveBaseName).fileName()).hasMatch() &&
                 QFile::exists(autosaveBaseName)) {
 
             QFile::remove(autosaveBaseName);
         }
     }
 }
 
 KoUnit KisDocument::unit() const
 {
     return d->unit;
 }
 
 void KisDocument::setUnit(const KoUnit &unit)
 {
     if (d->unit != unit) {
         d->unit = unit;
         emit unitChanged(unit);
     }
 }
 
 KUndo2Stack *KisDocument::undoStack()
 {
     return d->undoStack;
 }
 
 KisImportExportManager *KisDocument::importExportManager() const
 {
     return d->importExportManager;
 }
 
 void KisDocument::addCommand(KUndo2Command *command)
 {
     if (command)
         d->undoStack->push(command);
 }
 
 void KisDocument::beginMacro(const KUndo2MagicString & text)
 {
     d->undoStack->beginMacro(text);
 }
 
 void KisDocument::endMacro()
 {
     d->undoStack->endMacro();
 }
 
 void KisDocument::slotUndoStackCleanChanged(bool value)
 {
     setModified(!value);
 }
 
 void KisDocument::slotConfigChanged()
 {
     KisConfig cfg(true);
 
     if (d->undoStack->undoLimit() != cfg.undoStackLimit()) {
         if (!d->undoStack->isClean()) {
             d->undoStack->clear();
         }
         d->undoStack->setUndoLimit(cfg.undoStackLimit());
     }
 
     d->autoSaveDelay = cfg.autoSaveInterval();
     setNormalAutoSaveInterval();
 }
 
 void KisDocument::slotImageRootChanged()
 {
     d->syncDecorationsWrapperLayerState();
 }
 
 void KisDocument::clearUndoHistory()
 {
     d->undoStack->clear();
 }
 
 KisGridConfig KisDocument::gridConfig() const
 {
     return d->gridConfig;
 }
 
 void KisDocument::setGridConfig(const KisGridConfig &config)
 {
     if (d->gridConfig != config) {
         d->gridConfig = config;
         d->syncDecorationsWrapperLayerState();
         emit sigGridConfigChanged(config);
     }
 }
 
 QList<KoColorSet *> &KisDocument::paletteList()
 {
     return d->paletteList;
 }
 
 void KisDocument::setPaletteList(const QList<KoColorSet *> &paletteList, bool emitSignal)
 {
     if (d->paletteList != paletteList) {
         QList<KoColorSet *> oldPaletteList = d->paletteList;
         d->paletteList = paletteList;
         if (emitSignal) {
             emit sigPaletteListChanged(oldPaletteList, paletteList);
         }
     }
 }
 
 const KisGuidesConfig& KisDocument::guidesConfig() const
 {
     return d->guidesConfig;
 }
 
 void KisDocument::setGuidesConfig(const KisGuidesConfig &data)
 {
     if (d->guidesConfig == data) return;
 
     d->guidesConfig = data;
     d->syncDecorationsWrapperLayerState();
     emit sigGuidesConfigChanged(d->guidesConfig);
 }
 
 const KisMirrorAxisConfig& KisDocument::mirrorAxisConfig() const
 {
     return d->mirrorAxisConfig;
 }
 
 void KisDocument::setMirrorAxisConfig(const KisMirrorAxisConfig &config)
 {
     if (d->mirrorAxisConfig == config) {
         return;
     }
 
     d->mirrorAxisConfig = config;
     setModified(true);
 
     emit sigMirrorAxisConfigChanged();
 }
 
 void KisDocument::resetURL() {
     setUrl(QUrl());
     setLocalFilePath(QString());
 }
 
 KoDocumentInfoDlg *KisDocument::createDocumentInfoDialog(QWidget *parent, KoDocumentInfo *docInfo) const
 {
     return new KoDocumentInfoDlg(parent, docInfo);
 }
 
 bool KisDocument::isReadWrite() const
 {
     return d->readwrite;
 }
 
 QUrl KisDocument::url() const
 {
     return d->m_url;
 }
 
 bool KisDocument::closeUrl(bool promptToSave)
 {
     if (promptToSave) {
         if ( isReadWrite() && isModified()) {
             Q_FOREACH (KisView *view, KisPart::instance()->views()) {
                 if (view && view->document() == this) {
                     if (!view->queryClose()) {
                         return false;
                     }
                 }
             }
         }
     }
     // Not modified => ok and delete temp file.
     d->mimeType = QByteArray();
 
     // It always succeeds for a read-only part,
     // but the return value exists for reimplementations
     // (e.g. pressing cancel for a modified read-write part)
     return true;
 }
 
 
 
 void KisDocument::setUrl(const QUrl &url)
 {
     d->m_url = url;
 }
 
 QString KisDocument::localFilePath() const
 {
     return d->m_file;
 }
 
 
 void KisDocument::setLocalFilePath( const QString &localFilePath )
 {
     d->m_file = localFilePath;
 }
 
 bool KisDocument::openUrlInternal(const QUrl &url)
 {
     if ( !url.isValid() ) {
         return false;
     }
 
     if (d->m_bAutoDetectedMime) {
         d->mimeType = QByteArray();
         d->m_bAutoDetectedMime = false;
     }
 
     QByteArray mimetype = d->mimeType;
 
     if ( !closeUrl() ) {
         return false;
     }
 
     d->mimeType = mimetype;
     setUrl(url);
 
     d->m_file.clear();
 
     if (d->m_url.isLocalFile()) {
         d->m_file = d->m_url.toLocalFile();
         bool ret;
         // set the mimetype only if it was not already set (for example, by the host application)
         if (d->mimeType.isEmpty()) {
             // get the mimetype of the file
             // using findByUrl() to avoid another string -> url conversion
             QString mime = KisMimeDatabase::mimeTypeForFile(d->m_url.toLocalFile());
             d->mimeType = mime.toLocal8Bit();
             d->m_bAutoDetectedMime = true;
         }
 
         setUrl(d->m_url);
         ret = openFile();
 
         if (ret) {
             emit completed();
         } else {
             emit canceled(QString());
         }
         return ret;
     }
     return false;
 }
 
 bool KisDocument::newImage(const QString& name,
                            qint32 width, qint32 height,
                            const KoColorSpace* cs,
                            const KoColor &bgColor, KisConfig::BackgroundStyle bgStyle,
                            int numberOfLayers,
                            const QString &description, const double imageResolution)
 {
     Q_ASSERT(cs);
 
     KisImageSP image;
 
     if (!cs) return false;
 
     QApplication::setOverrideCursor(Qt::BusyCursor);
 
     image = new KisImage(createUndoStore(), width, height, cs, name);
 
     Q_CHECK_PTR(image);
 
     connect(image, SIGNAL(sigImageModified()), this, SLOT(setImageModified()), Qt::UniqueConnection);
     image->setResolution(imageResolution, imageResolution);
 
     image->assignImageProfile(cs->profile());
     documentInfo()->setAboutInfo("title", name);
     documentInfo()->setAboutInfo("abstract", description);
 
     KisLayerSP layer;
     if (bgStyle == KisConfig::RASTER_LAYER || bgStyle == KisConfig::FILL_LAYER) {
         KoColor strippedAlpha = bgColor;
         strippedAlpha.setOpacity(OPACITY_OPAQUE_U8);
 
         if (bgStyle == KisConfig::RASTER_LAYER) {
             layer = new KisPaintLayer(image.data(), "Background", OPACITY_OPAQUE_U8, cs);;
             layer->paintDevice()->setDefaultPixel(strippedAlpha);
         } else if (bgStyle == KisConfig::FILL_LAYER) {
             KisFilterConfigurationSP filter_config = KisGeneratorRegistry::instance()->get("color")->defaultConfiguration();
             filter_config->setProperty("color", strippedAlpha.toQColor());
             layer = new KisGeneratorLayer(image.data(), "Background Fill", filter_config, image->globalSelection());
         }
 
         layer->setOpacity(bgColor.opacityU8());
 
         if (numberOfLayers > 1) {
             //Lock bg layer if others are present.
             layer->setUserLocked(true);
         }
     }
     else { // KisConfig::CANVAS_COLOR (needs an unlocked starting layer).
         image->setDefaultProjectionColor(bgColor);
         layer = new KisPaintLayer(image.data(), image->nextLayerName(), OPACITY_OPAQUE_U8, cs);
     }
 
     Q_CHECK_PTR(layer);
     image->addNode(layer.data(), image->rootLayer().data());
     layer->setDirty(QRect(0, 0, width, height));
 
     setCurrentImage(image);
 
     for(int i = 1; i < numberOfLayers; ++i) {
         KisPaintLayerSP layer = new KisPaintLayer(image, image->nextLayerName(), OPACITY_OPAQUE_U8, cs);
         image->addNode(layer, image->root(), i);
         layer->setDirty(QRect(0, 0, width, height));
     }
 
     KisConfig cfg(false);
     cfg.defImageWidth(width);
     cfg.defImageHeight(height);
     cfg.defImageResolution(imageResolution);
     cfg.defColorModel(image->colorSpace()->colorModelId().id());
     cfg.setDefaultColorDepth(image->colorSpace()->colorDepthId().id());
     cfg.defColorProfile(image->colorSpace()->profile()->name());
 
     KisUsageLogger::log(i18n("Created image \"%1\", %2 * %3 pixels, %4 dpi. Color model: %6 %5 (%7). Layers: %8"
                              , name
                              , width, height
                              , imageResolution * 72.0
                              , image->colorSpace()->colorModelId().name(), image->colorSpace()->colorDepthId().name()
                              , image->colorSpace()->profile()->name()
                              , numberOfLayers));
 
     QApplication::restoreOverrideCursor();
 
     return true;
 }
 
 bool KisDocument::isSaving() const
 {
     const bool result = d->savingMutex.tryLock();
     if (result) {
         d->savingMutex.unlock();
     }
     return !result;
 }
 
 void KisDocument::waitForSavingToComplete()
 {
     if (isSaving()) {
         KisAsyncActionFeedback f(i18nc("progress dialog message when the user closes the document that is being saved", "Waiting for saving to complete..."), 0);
         f.waitForMutex(&d->savingMutex);
     }
 }
 
 KoShapeControllerBase *KisDocument::shapeController() const
 {
     return d->shapeController;
 }
 
 KoShapeLayer* KisDocument::shapeForNode(KisNodeSP layer) const
 {
     return d->shapeController->shapeForNode(layer);
 }
 
 QList<KisPaintingAssistantSP> KisDocument::assistants() const
 {
     return d->assistants;
 }
 
 void KisDocument::setAssistants(const QList<KisPaintingAssistantSP> &value)
 {
     if (d->assistants != value) {
         d->assistants = value;
         d->syncDecorationsWrapperLayerState();
         emit sigAssistantsChanged();
     }
 }
 
-KisSharedPtr<KisReferenceImagesLayer> KisDocument::referenceImagesLayer() const
+KisReferenceImagesLayerSP KisDocument::referenceImagesLayer() const
 {
-    return d->referenceImagesLayer.data();
+    if (!d->image) return KisReferenceImagesLayerSP();
+
+    KisReferenceImagesLayerSP referencesLayer =
+        KisLayerUtils::findNodeByType<KisReferenceImagesLayer>(d->image->root());
+
+    return referencesLayer;
 }
 
 void KisDocument::setReferenceImagesLayer(KisSharedPtr<KisReferenceImagesLayer> layer, bool updateImage)
 {
-    if (d->referenceImagesLayer == layer) {
+    KisReferenceImagesLayerSP currentReferenceLayer = referenceImagesLayer();
+
+    if (currentReferenceLayer == layer) {
         return;
     }
 
-    if (d->referenceImagesLayer) {
-        d->referenceImagesLayer->disconnect(this);
+    if (currentReferenceLayer) {
+        currentReferenceLayer->disconnect(this);
     }
 
     if (updateImage) {
+        if (currentReferenceLayer) {
+            d->image->removeNode(currentReferenceLayer);
+        }
+
         if (layer) {
             d->image->addNode(layer);
-        } else {
-            d->image->removeNode(d->referenceImagesLayer);
         }
     }
 
-    d->referenceImagesLayer = layer;
+    currentReferenceLayer = layer;
 
-    if (d->referenceImagesLayer) {
-        connect(d->referenceImagesLayer, SIGNAL(sigUpdateCanvas(QRectF)),
+    if (currentReferenceLayer) {
+        connect(currentReferenceLayer, SIGNAL(sigUpdateCanvas(QRectF)),
                 this, SIGNAL(sigReferenceImagesChanged()));
     }
+
     emit sigReferenceImagesLayerChanged(layer);
 }
 
 void KisDocument::setPreActivatedNode(KisNodeSP activatedNode)
 {
     d->preActivatedNode = activatedNode;
 }
 
 KisNodeSP KisDocument::preActivatedNode() const
 {
     return d->preActivatedNode;
 }
 
 KisImageWSP KisDocument::image() const
 {
     return d->image;
 }
 
 KisImageSP KisDocument::savingImage() const
 {
     return d->savingImage;
 }
 
 
 void KisDocument::setCurrentImage(KisImageSP image, bool forceInitialUpdate)
 {
     if (d->image) {
         // Disconnect existing sig/slot connections
         d->image->setUndoStore(new KisDumbUndoStore());
         d->image->disconnect(this);
         d->shapeController->setImage(0);
         d->image = 0;
     }
 
     if (!image) return;
 
     d->setImageAndInitIdleWatcher(image);
     d->image->setUndoStore(new KisDocumentUndoStore(this));
     d->shapeController->setImage(image);
     setModified(false);
     connect(d->image, SIGNAL(sigImageModified()), this, SLOT(setImageModified()), Qt::UniqueConnection);
     connect(d->image, SIGNAL(sigLayersChangedAsync()), this, SLOT(slotImageRootChanged()));
 
     if (forceInitialUpdate) {
         d->image->initialRefreshGraph();
     }
 }
 
 void KisDocument::hackPreliminarySetImage(KisImageSP image)
 {
     KIS_SAFE_ASSERT_RECOVER_RETURN(!d->image);
 
     d->setImageAndInitIdleWatcher(image);
     d->shapeController->setImage(image);
 }
 
 void KisDocument::setImageModified()
 {
     // we only set as modified if undo stack is not at clean state
     setModified(!d->undoStack->isClean());
 }
 
 
 KisUndoStore* KisDocument::createUndoStore()
 {
     return new KisDocumentUndoStore(this);
 }
 
 bool KisDocument::isAutosaving() const
 {
     return d->isAutosaving;
 }
 
 QString KisDocument::exportErrorToUserMessage(KisImportExportErrorCode status, const QString &errorMessage)
 {
     return errorMessage.isEmpty() ? status.errorMessage() : errorMessage;
 }
 
 void KisDocument::setAssistantsGlobalColor(QColor color)
 {
     d->globalAssistantsColor = color;
 }
 
 QColor KisDocument::assistantsGlobalColor()
 {
     return d->globalAssistantsColor;
 }
 
 QRectF KisDocument::documentBounds() const
 {
     QRectF bounds = d->image->bounds();
 
-    if (d->referenceImagesLayer) {
-        bounds |= d->referenceImagesLayer->boundingImageRect();
+    KisReferenceImagesLayerSP referenceImagesLayer = this->referenceImagesLayer();
+
+    if (referenceImagesLayer) {
+        bounds |= referenceImagesLayer->boundingImageRect();
     }
 
     return bounds;
 }
diff --git a/libs/ui/flake/KisReferenceImagesLayer.h b/libs/ui/flake/KisReferenceImagesLayer.h
index 302f4fe7f7..a8b8eb4a94 100644
--- a/libs/ui/flake/KisReferenceImagesLayer.h
+++ b/libs/ui/flake/KisReferenceImagesLayer.h
@@ -1,72 +1,74 @@
 /*
  * Copyright (C) 2017 Jouni Pentikäinen <joupent@gmail.com>
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
  * License as published by the Free Software Foundation; either
  * version 2 of the License, or (at your option) any later version.
  *
  * This library is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  * Library General Public License for more details.
  *
  * You should have received a copy of the GNU Library General Public License
  * along with this library; see the file COPYING.LIB.  If not, write to
  * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
  * Boston, MA 02110-1301, USA.
  */
 
 #ifndef KRITA_KISREFERENCEIMAGESLAYER_H
 #define KRITA_KISREFERENCEIMAGESLAYER_H
 
 #include "kis_shape_layer.h"
 
 #include <kis_types.h>
 
 class KisDocument;
 
 class KRITAUI_EXPORT KisReferenceImagesLayer : public KisShapeLayer
 {
     Q_OBJECT
 
 public:
     KisReferenceImagesLayer(KoShapeControllerBase* shapeController, KisImageWSP image);
     KisReferenceImagesLayer(const KisReferenceImagesLayer &rhs);
 
     static KUndo2Command * addReferenceImages(KisDocument *document, QList<KoShape*> referenceImages);
     KUndo2Command * removeReferenceImages(KisDocument *document, QList<KoShape*> referenceImages);
     QVector<KisReferenceImage*> referenceImages() const;
 
     QRectF boundingImageRect() const;
     QColor getPixel(QPointF position) const;
 
     void paintReferences(QPainter &painter);
 
     bool allowAsChild(KisNodeSP) const override;
 
     bool accept(KisNodeVisitor&) override;
     void accept(KisProcessingVisitor &visitor, KisUndoAdapter *undoAdapter) override;
 
     KisNodeSP clone() const override {
         return new KisReferenceImagesLayer(*this);
     }
 
     bool isFakeNode() const override;
 
 Q_SIGNALS:
     /**
      * The content of the layer has changed, and the canvas decoration
      * needs to update.
      */
     void sigUpdateCanvas(const QRectF &rect);
 
 private:
     void signalUpdate(const QRectF &rect);
     friend struct AddReferenceImagesCommand;
     friend struct RemoveReferenceImagesCommand;
     friend class ReferenceImagesCanvas;
 };
 
+typedef KisSharedPtr<KisReferenceImagesLayer> KisReferenceImagesLayerSP;
+
 
 #endif //KRITA_KISREFERENCEIMAGESLAYER_H