Adding upstream version 1.2.2.upstream/1.2.2upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 4428 insertions, 0 deletions

diff --git a/src/selection-chemistry.cpp b/src/selection-chemistry.cpp
new file mode 100644
index 0000000..abb567a
--- /dev/null
+++ b/src/selection-chemistry.cpp
@@ -0,0 +1,4428 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/** @file
+ * Miscellaneous operations on selected items.
+ */
+/* Authors:
+ *   Lauris Kaplinski <lauris@kaplinski.com>
+ *   Frank Felfe <innerspace@iname.com>
+ *   MenTaLguY <mental@rydia.net>
+ *   bulia byak <buliabyak@users.sf.net>
+ *   Andrius R. <knutux@gmail.com>
+ *   Jon A. Cruz <jon@joncruz.org>
+ *   Martin Sucha <martin.sucha-inkscape@jts-sro.sk>
+ *   Abhishek Sharma
+ *   Kris De Gussem <Kris.DeGussem@gmail.com>
+ *   Tavmjong Bah <tavmjong@free.fr> (Symbol additions)
+ *   Adrian Boguszewski
+ *   Marc Jeanmougin
+ *
+ * Copyright (C) 1999-2016 authors
+ * Copyright (C) 2001-2002 Ximian, Inc.
+ *
+ * Released under GNU GPL v2+, read the file 'COPYING' for more information.
+ */
+
+#include "selection-chemistry.h"
+
+#include <boost/range/adaptor/reversed.hpp>
+#include <cstring>
+#include <glibmm/i18n.h>
+#include <gtkmm/clipboard.h>
+#include <map>
+#include <string>
+
+#include "actions/actions-tools.h" // Switching tools
+#include "context-fns.h"
+#include "desktop-style.h"
+#include "desktop.h"
+#include "display/cairo-utils.h"
+#include "display/control/canvas-item-bpath.h"
+#include "display/curve.h"
+#include "document-undo.h"
+#include "file.h"
+#include "filter-chemistry.h"
+#include "gradient-drag.h"
+#include "helper/pixbuf-ops.h"
+#include "io/resource.h"
+#include "layer-manager.h"
+#include "live_effects/effect.h"
+#include "live_effects/lpeobject.h"
+#include "live_effects/parameter/originalpath.h"
+#include "message-stack.h"
+#include "object/box3d.h"
+#include "object/object-set.h"
+#include "object/persp3d.h"
+#include "object/sp-clippath.h"
+#include "object/sp-conn-end.h"
+#include "object/sp-defs.h"
+#include "object/sp-ellipse.h"
+#include "object/sp-flowregion.h"
+#include "object/sp-flowtext.h"
+#include "object/sp-gradient-reference.h"
+#include "object/sp-image.h"
+#include "object/sp-item-transform.h"
+#include "object/sp-item.h"
+#include "object/sp-line.h"
+#include "object/sp-linear-gradient.h"
+#include "object/sp-marker.h"
+#include "object/sp-mask.h"
+#include "object/sp-namedview.h"
+#include "object/sp-offset.h"
+#include "object/sp-path.h"
+#include "object/sp-pattern.h"
+#include "object/sp-polyline.h"
+#include "object/sp-radial-gradient.h"
+#include "object/sp-rect.h"
+#include "object/sp-root.h"
+#include "object/sp-spiral.h"
+#include "object/sp-star.h"
+#include "object/sp-symbol.h"
+#include "object/sp-textpath.h"
+#include "object/sp-tref.h"
+#include "object/sp-tspan.h"
+#include "object/sp-use.h"
+#include "path-chemistry.h"
+#include "selection.h"
+#include "style.h"
+#include "svg/svg-color.h"
+#include "svg/svg.h"
+#include "text-chemistry.h"
+#include "text-editing.h"
+#include "ui/clipboard.h"
+#include "ui/icon-names.h"
+#include "ui/tool/control-point-selection.h"
+#include "ui/tool/multi-path-manipulator.h"
+#include "ui/tools/connector-tool.h"
+#include "ui/tools/dropper-tool.h"
+#include "ui/tools/gradient-tool.h"
+#include "ui/tools/node-tool.h"
+#include "ui/tools/text-tool.h"
+#include "ui/widget/canvas.h" // is_dragging()
+#include "xml/rebase-hrefs.h"
+#include "xml/simple-document.h"
+
+// TODO FIXME: This should be moved into preference repr
+SPCycleType SP_CYCLING = SP_CYCLE_FOCUS;
+
+using Inkscape::DocumentUndo;
+using Geom::X;
+using Geom::Y;
+using Inkscape::UI::Tools::GradientTool;
+using Inkscape::UI::Tools::NodeTool;
+using Inkscape::UI::Tools::TextTool;
+using namespace Inkscape;
+
+/* The clipboard handling is in ui/clipboard.cpp now. There are some legacy functions left here,
+because the layer manipulation code uses them. It should be rewritten specifically
+for that purpose. */
+
+
+// helper for printing error messages, regardless of whether we have a GUI or not
+// If desktop == NULL, errors will be shown on stderr
+static void
+selection_display_message(SPDesktop *desktop, Inkscape::MessageType msgType, Glib::ustring const &msg)
+{
+    if (desktop) {
+        desktop->messageStack()->flash(msgType, msg);
+    } else {
+        if (msgType == Inkscape::IMMEDIATE_MESSAGE ||
+            msgType == Inkscape::WARNING_MESSAGE ||
+            msgType == Inkscape::ERROR_MESSAGE) {
+            g_printerr("%s\n", msg.c_str());
+        }
+    }
+}
+
+namespace Inkscape {
+
+void SelectionHelper::selectAll(SPDesktop *dt)
+{
+    NodeTool *nt = dynamic_cast<NodeTool*>(dt->event_context);
+    if (nt) {
+        if (!nt->_multipath->empty()) {
+            nt->_multipath->selectSubpaths();
+            return;
+        }
+    }
+    sp_edit_select_all(dt);
+}
+
+void SelectionHelper::selectAllInAll(SPDesktop *dt)
+{
+    NodeTool *nt = dynamic_cast<NodeTool*>(dt->event_context);
+    if (nt) {
+        nt->_selected_nodes->selectAll();
+    } else {
+        sp_edit_select_all_in_all_layers(dt);
+    }
+}
+
+void SelectionHelper::selectNone(SPDesktop *dt)
+{
+    NodeTool *nt = dynamic_cast<NodeTool*>(dt->event_context);
+    if (nt && !nt->_selected_nodes->empty()) {
+        nt->_selected_nodes->clear();
+    } else if (!dt->getSelection()->isEmpty()) {
+        dt->getSelection()->clear();
+    } else {
+        // If nothing selected switch to selection tool
+        set_active_tool(dt, "Select");
+    }
+}
+
+void SelectionHelper::selectSameFillStroke(SPDesktop *dt)
+{
+    sp_select_same_fill_stroke_style(dt, true, true, true);
+}
+
+void SelectionHelper::selectSameFillColor(SPDesktop *dt)
+{
+    sp_select_same_fill_stroke_style(dt, true, false, false);
+}
+
+void SelectionHelper::selectSameStrokeColor(SPDesktop *dt)
+{
+    sp_select_same_fill_stroke_style(dt, false, true, false);
+}
+
+void SelectionHelper::selectSameStrokeStyle(SPDesktop *dt)
+{
+    sp_select_same_fill_stroke_style(dt, false, false, true);
+}
+
+void SelectionHelper::selectSameObjectType(SPDesktop *dt)
+{
+    sp_select_same_object_type(dt);
+}
+
+void SelectionHelper::invert(SPDesktop *dt)
+{
+    NodeTool *nt = dynamic_cast<NodeTool*>(dt->event_context);
+    if (nt) {
+        nt->_multipath->invertSelectionInSubpaths();
+    } else {
+        sp_edit_invert(dt);
+    }
+}
+
+void SelectionHelper::invertAllInAll(SPDesktop *dt)
+{
+    NodeTool *nt = dynamic_cast<NodeTool*>(dt->event_context);
+    if (nt) {
+        nt->_selected_nodes->invertSelection();
+    } else {
+        sp_edit_invert_in_all_layers(dt);
+    }
+}
+
+void SelectionHelper::reverse(SPDesktop *dt)
+{
+    // TODO make this a virtual method of event context!
+    NodeTool *nt = dynamic_cast<NodeTool*>(dt->event_context);
+    if (nt) {
+        nt->_multipath->reverseSubpaths();
+    } else {
+        dt->getSelection()->pathReverse();
+    }
+}
+
+/*
+ * Fixes the current selection, removing locked objects from it
+ */
+void SelectionHelper::fixSelection(SPDesktop *dt)
+{
+    if (!dt) {
+        return;
+    }
+
+    Inkscape::Selection *selection = dt->getSelection();
+
+    std::vector<SPItem*> items;
+
+    auto selList = selection->items();
+
+    for(auto i = boost::rbegin(selList); i != boost::rend(selList); ++i) {
+        SPItem *item = *i;
+        if( item &&
+            !dt->layerManager().isLayer(item) &&
+            (!item->isLocked()))
+        {
+            items.push_back(item);
+        }
+    }
+
+    selection->setList(items);
+}
+
+} // namespace Inkscape
+
+
+/**
+ * Copies repr and its inherited css style elements, along with the accumulated transform 'full_t',
+ * then prepends the copy to 'clip'.
+ */
+static void sp_selection_copy_one(Inkscape::XML::Node *repr, Geom::Affine full_t, std::vector<Inkscape::XML::Node*> &clip, Inkscape::XML::Document* xml_doc)
+{
+    Inkscape::XML::Node *copy = repr->duplicate(xml_doc);
+
+    // copy complete inherited style
+    SPCSSAttr *css = sp_repr_css_attr_inherited(repr, "style");
+    sp_repr_css_set(copy, css, "style");
+    sp_repr_css_attr_unref(css);
+
+    // write the complete accumulated transform passed to us
+    // (we're dealing with unattached repr, so we write to its attr
+    // instead of using sp_item_set_transform)
+    copy->setAttributeOrRemoveIfEmpty("transform", sp_svg_transform_write(full_t));
+
+    clip.insert(clip.begin(),copy);
+}
+
+static void sp_selection_copy_impl(std::vector<SPItem*> const &items, std::vector<Inkscape::XML::Node*> &clip, Inkscape::XML::Document* xml_doc)
+{
+    // Sort items:
+    std::vector<SPItem*> sorted_items(items);
+    sort(sorted_items.begin(),sorted_items.end(),sp_object_compare_position_bool);
+
+    // Copy item reprs:
+    for (auto item : sorted_items) {
+        if (item) {
+            sp_selection_copy_one(item->getRepr(), item->i2doc_affine(), clip, xml_doc);
+        } else {
+            g_assert_not_reached();
+        }
+    }
+    reverse(clip.begin(),clip.end());
+}
+
+// TODO check if parent parameter should be changed to SPItem, of if the code should handle non-items.
+static std::vector<Inkscape::XML::Node *> sp_selection_paste_impl(SPDocument *doc, SPObject *parent,
+                                                                  std::vector<Inkscape::XML::Node *> &clip,
+                                                                  Inkscape::XML::Node *after = nullptr)
+{
+    assert(!after || after->parent() == parent->getRepr());
+    assert(!parent->cloned);
+
+    Inkscape::XML::Document *xml_doc = doc->getReprDoc();
+
+    SPItem *parentItem = dynamic_cast<SPItem *>(parent);
+    g_assert(parentItem != nullptr);
+
+    std::vector<Inkscape::XML::Node*> copied;
+    // add objects to document
+    for (auto repr : clip) {
+        Inkscape::XML::Node *copy = repr->duplicate(xml_doc);
+
+        // premultiply the item transform by the accumulated parent transform in the paste layer
+        Geom::Affine local(parentItem->i2doc_affine());
+        if (!local.isIdentity()) {
+            gchar const *t_str = copy->attribute("transform");
+            Geom::Affine item_t(Geom::identity());
+            if (t_str)
+                sp_svg_transform_read(t_str, &item_t);
+            item_t *= local.inverse();
+            // (we're dealing with unattached repr, so we write to its attr instead of using sp_item_set_transform)
+            copy->setAttributeOrRemoveIfEmpty("transform", sp_svg_transform_write(item_t));
+        }
+
+        parent->getRepr()->addChild(copy, after);
+        after = copy;
+
+        copied.push_back(copy);
+        Inkscape::GC::release(copy);
+    }
+    return copied;
+}
+
+static void sp_selection_delete_impl(std::vector<SPItem*> const &items, bool propagate = true, bool propagate_descendants = true)
+{
+    for (auto item : items) {
+        sp_object_ref(item, nullptr);
+    }
+    for (auto item : items) {
+        item->deleteObject(propagate, propagate_descendants);
+        sp_object_unref(item, nullptr);
+    }
+}
+
+
+void ObjectSet::deleteItems()
+{
+    if (isEmpty()) {
+        selection_display_message(desktop(),Inkscape::WARNING_MESSAGE, _("<b>Nothing</b> was deleted."));
+        return;
+    }
+
+    std::vector<SPItem*> selected(items().begin(), items().end());
+    clear();
+    sp_selection_delete_impl(selected);
+    if (SPDesktop *dt = desktop()) {
+        dt->layerManager().currentLayer()->requestDisplayUpdate(SP_OBJECT_MODIFIED_FLAG);
+
+        /* A tool may have set up private information in it's selection context
+         * that depends on desktop items.  I think the only sane way to deal with
+         * this currently is to reset the event context which will reset it's
+         * associated selection context.  For example: deleting an object
+         * while moving it around the canvas.
+         */
+        dt->setEventContext(dt->getEventContext()->getPrefsPath());
+    }
+
+    if(document()) {
+        DocumentUndo::done(document(), _("Delete"), INKSCAPE_ICON("edit-delete"));
+    }
+}
+
+
+
+static void add_ids_recursive(std::vector<const gchar *> &ids, SPObject *obj)
+{
+    if (obj) {
+        ids.push_back(obj->getId());
+
+        if (dynamic_cast<SPGroup *>(obj)) {
+            for (auto& child: obj->children) {
+                add_ids_recursive(ids, &child);
+            }
+        }
+    }
+}
+
+void ObjectSet::duplicate(bool suppressDone, bool duplicateLayer)
+{
+    if(duplicateLayer && !desktop() ){
+        //TODO: understand why layer management is tied to desktop and not to document.
+        return;
+    }
+
+    SPDocument *doc = document();
+
+    if(!doc)
+        return;
+
+    Inkscape::XML::Document* xml_doc = doc->getReprDoc();
+
+    // check if something is selected
+    if (isEmpty() && !duplicateLayer) {
+        selection_display_message(desktop(),Inkscape::WARNING_MESSAGE, _("Select <b>object(s)</b> to duplicate."));
+        return;
+    }
+    std::vector<Inkscape::XML::Node*> reprs(xmlNodes().begin(), xmlNodes().end());
+
+    if(duplicateLayer){
+        reprs.clear();
+        reprs.push_back(desktop()->layerManager().currentLayer()->getRepr());
+    }
+
+    clear();
+
+    std::vector<SPItem *> items;
+    for(auto old_repr : reprs) {
+        SPItem *item = dynamic_cast<SPItem *>(doc->getObjectByRepr(old_repr));
+        if (item) {
+            items.push_back(item);
+            SPLPEItem *lpeitem = dynamic_cast<SPLPEItem *>(item);
+            if (lpeitem) {
+                for (auto satellite : lpeitem->get_satellites(false, true)) {
+                    if (satellite) {
+                        SPItem *item2 = dynamic_cast<SPItem *>(satellite);
+                        if (item2 && std::find(items.begin(), items.end(), item2) == items.end()) {
+                            items.push_back(item2);
+                        }
+                    }
+                }
+            }
+        }
+    }
+    for(auto item : items) {
+        if (std::find(reprs.begin(), reprs.end(), item->getRepr()) == reprs.end()) {
+            reprs.push_back(item->getRepr());
+        }
+    }
+    // sorting items from different parents sorts each parent's subset without possibly mixing
+    // them, just what we need
+    sort(reprs.begin(),reprs.end(),sp_repr_compare_position_bool);
+
+    std::vector<const gchar *> old_ids;
+    std::vector<const gchar *> new_ids;
+    Inkscape::Preferences *prefs = Inkscape::Preferences::get();
+    bool relink_clones = prefs->getBool("/options/relinkclonesonduplicate/value");
+    const bool fork_livepatheffects = prefs->getBool("/options/forklpeonduplicate/value", true);
+
+    // check ref-d shapes, split in defs|internal|external
+    // add external & defs to reprs
+    auto text_refs = text_categorize_refs(doc, reprs.begin(), reprs.end(),
+            static_cast<text_ref_t>(TEXT_REF_DEF | TEXT_REF_EXTERNAL | TEXT_REF_INTERNAL));
+    for (auto const &ref : text_refs) {
+        if (ref.second == TEXT_REF_DEF || ref.second == TEXT_REF_EXTERNAL) {
+            reprs.push_back(doc->getObjectById(ref.first)->getRepr());
+        }
+    }
+
+    std::vector<Inkscape::XML::Node*> copies;
+    for(auto old_repr : reprs) {
+        Inkscape::XML::Node *parent = old_repr->parent();
+        Inkscape::XML::Node *copy = old_repr->duplicate(xml_doc);
+
+        if (!duplicateLayer || sp_repr_is_def(old_repr)) {
+            parent->appendChild(copy);
+        } else if (sp_repr_is_layer(old_repr)) {
+            parent->addChild(copy, old_repr);
+        } else {
+            // duplicateLayer, non-layer, non-def
+            // external nodes -- append to new layer
+            // text_relink will ignore extra nodes in layer children
+            copies[0]->appendChild(copy);
+        }
+        SPObject *old_obj = doc->getObjectByRepr(old_repr);
+        SPObject *new_obj = doc->getObjectByRepr(copy);
+        old_obj->setSuccessor(new_obj);
+        if (relink_clones) {
+            add_ids_recursive(old_ids, old_obj);
+            add_ids_recursive(new_ids, new_obj);
+        }
+
+        copies.push_back(copy);
+        Inkscape::GC::release(copy);
+    }
+
+    // Relink copied text nodes to copied reference shapes
+    text_relink_refs(text_refs, reprs.begin(), reprs.end(), copies.begin());
+
+    // copies contains def nodes, we don't want that in our selection
+    std::vector<Inkscape::XML::Node*> newsel;
+    if (!duplicateLayer) {
+        // compute newsel, by removing def nodes from copies
+        for (auto node : copies) {
+            // hide on duple this is done to dont show autoselected hidden LPE items satellites
+            // is only a make up if at any point we think is better keep selected items reselected on duple
+            // please roll back or make some more loops to handle well, keep as it for speed
+            // and simplicity
+            SPItem *itm = dynamic_cast<SPItem *>(doc->getObjectByRepr(node));
+            if (!sp_repr_is_def(node) && (!itm || !itm->isHidden())) {
+                newsel.push_back(node);
+            }
+        }
+    }
+
+    if (relink_clones) {
+
+        g_assert(old_ids.size() == new_ids.size());
+
+        for (unsigned int i = 0; i < old_ids.size(); i++) {
+            const gchar *id = old_ids[i];
+            SPObject *old_clone = doc->getObjectById(id);
+            SPUse *use = dynamic_cast<SPUse *>(old_clone);
+            SPOffset *offset = dynamic_cast<SPOffset *>(old_clone);
+            SPText *text = dynamic_cast<SPText *>(old_clone);
+            SPPath *path = dynamic_cast<SPPath *>(old_clone);
+            if (use) {
+                SPItem *orig = use->get_original();
+                if (!orig) // orphaned
+                    continue;
+                for (unsigned int j = 0; j < old_ids.size(); j++) {
+                    if (!strcmp(orig->getId(), old_ids[j])) {
+                        // we have both orig and clone in selection, relink
+                        // std::cout << id  << " old, its ori: " << orig->getId() << "; will relink:" << new_ids[i] << " to " << new_ids[j] << "\n";
+                        SPObject *new_clone = doc->getObjectById(new_ids[i]);
+                        new_clone->setAttribute("xlink:href", Glib::ustring("#") + new_ids[j]);
+                        new_clone->requestDisplayUpdate(SP_OBJECT_MODIFIED_FLAG);
+                    }
+                }
+            } else if (offset) {
+                gchar *source_href = offset->sourceHref;
+                for (guint j = 0; j < old_ids.size(); j++) {
+                    if (source_href && source_href[0]=='#' && !strcmp(source_href+1, old_ids[j])) {
+                        doc->getObjectById(new_ids[i])->setAttribute("xlink:href", Glib::ustring("#") + new_ids[j]);
+                    }
+                }
+            } else if (text) {
+                SPTextPath *textpath = dynamic_cast<SPTextPath *>(text->firstChild());
+                if (!textpath) continue;
+                const gchar *source_href = sp_textpath_get_path_item(textpath)->getId();
+                for (guint j = 0; j < old_ids.size(); j++) {
+                    if (!strcmp(source_href, old_ids[j])) {
+                        doc->getObjectById(new_ids[i])->firstChild()->setAttribute("xlink:href", Glib::ustring("#") + new_ids[j]);
+                    }
+                }
+            } else if (path) {
+                if (old_clone->getAttribute("inkscape:connection-start") != nullptr) {
+                    const char *old_start = old_clone->getAttribute("inkscape:connection-start");
+                    const char *old_end = old_clone->getAttribute("inkscape:connection-end");
+                    SPObject *new_clone = doc->getObjectById(new_ids[i]);
+                    for (guint j = 0; j < old_ids.size(); j++) {
+                        if(old_start == Glib::ustring("#") + old_ids[j]) {
+                            new_clone->setAttribute("inkscape:connection-start", Glib::ustring("#") + new_ids[j]);
+                        }
+                        if(old_end == Glib::ustring("#") + old_ids[j]) {
+                            new_clone->setAttribute("inkscape:connection-end", Glib::ustring("#") + new_ids[j]);
+                        }
+                    }
+                }
+            }
+        }
+    }
+    for (auto node : copies) {
+        if (fork_livepatheffects) {
+            SPObject *new_obj = doc->getObjectByRepr(node);
+            SPLPEItem *newLPEObj = dynamic_cast<SPLPEItem *>(new_obj);
+            if (newLPEObj) {
+                // force always fork with 0 some issues on slices drom slices dont fork
+                newLPEObj->forkPathEffectsIfNecessary(0);
+                sp_lpe_item_update_patheffect(newLPEObj, false, true);
+            }
+        }
+    }
+    for(auto old_repr : reprs) {
+        SPObject *old_obj = doc->getObjectByRepr(old_repr);
+        if (old_obj->_successor) {
+            sp_object_unref(old_obj->_successor, nullptr);
+            old_obj->_successor = nullptr;
+            
+        }
+    }
+    if ( !suppressDone ) {
+        DocumentUndo::done(document(), _("Duplicate"), INKSCAPE_ICON("edit-duplicate"));
+    }
+    if(!duplicateLayer)
+        setReprList(newsel);
+    else{
+        SPObject* new_layer = doc->getObjectByRepr(copies[0]);
+        gchar* name = g_strdup_printf(_("%s copy"), new_layer->label());
+        desktop()->layerManager().renameLayer( new_layer, name, TRUE );
+        g_free(name);
+    }
+}
+
+void sp_edit_clear_all(Inkscape::Selection *selection)
+{
+    if (!selection)
+        return;
+
+    auto desktop = selection->desktop();
+    SPDocument *doc = desktop->getDocument();
+    selection->clear();
+
+    SPGroup *group = dynamic_cast<SPGroup *>(desktop->layerManager().currentLayer());
+    g_return_if_fail(group != nullptr);
+    std::vector<SPItem*> items = sp_item_group_item_list(group);
+
+    for(auto & item : items){
+        item->deleteObject();
+    }
+
+    DocumentUndo::done(doc, _("Delete all"), "");
+}
+
+/*
+ * Return a list of SPItems that are the children of 'list'
+ *
+ * list - source list of items to search in
+ * desktop - desktop associated with the source list
+ * exclude - list of items to exclude from result
+ * onlyvisible - TRUE includes only items visible on canvas
+ * onlysensitive - TRUE includes only non-locked items
+ * ingroups - TRUE to recursively get grouped items children
+ */
+std::vector<SPItem*> &get_all_items(std::vector<SPItem*> &list, SPObject *from, SPDesktop *desktop, bool onlyvisible, bool onlysensitive, bool ingroups, std::vector<SPItem*> const &exclude)
+{
+    for (auto& child: from->children) {
+        SPItem *item = dynamic_cast<SPItem *>(&child);
+        if (item &&
+            !desktop->layerManager().isLayer(item) &&
+            (!onlysensitive || !item->isLocked()) &&
+            (!onlyvisible || !desktop->itemIsHidden(item)) &&
+            (exclude.empty() || exclude.end() == std::find(exclude.begin(), exclude.end(), &child))
+            )
+        {
+            list.insert(list.begin(),item);
+        }
+
+        if (ingroups || (item && desktop->layerManager().isLayer(item))) {
+            list = get_all_items(list, &child, desktop, onlyvisible, onlysensitive, ingroups, exclude);
+        }
+    }
+
+    return list;
+}
+
+static void sp_edit_select_all_full(SPDesktop *dt, bool force_all_layers, bool invert)
+{
+    if (!dt)
+        return;
+
+    Inkscape::Selection *selection = dt->getSelection();
+
+    auto layer = dt->layerManager().currentLayer();
+    g_return_if_fail(layer);
+
+    Inkscape::Preferences *prefs = Inkscape::Preferences::get();
+    PrefsSelectionContext inlayer = (PrefsSelectionContext) prefs->getInt("/options/kbselection/inlayer", PREFS_SELECTION_LAYER);
+    bool onlyvisible = prefs->getBool("/options/kbselection/onlyvisible", true);
+    bool onlysensitive = prefs->getBool("/options/kbselection/onlysensitive", true);
+
+    std::vector<SPItem*> items ;
+
+    std::vector<SPItem*> exclude;
+    if (invert) {
+        exclude.insert(exclude.end(), selection->items().begin(), selection->items().end());
+    }
+
+    if (force_all_layers)
+        inlayer = PREFS_SELECTION_ALL;
+
+    switch (inlayer) {
+        case PREFS_SELECTION_LAYER: {
+        if ((onlysensitive && layer->isLocked()) || (onlyvisible && dt->itemIsHidden(layer)))
+        return;
+
+        std::vector<SPItem*> all_items = sp_item_group_item_list(layer);
+
+        for (std::vector<SPItem*>::const_reverse_iterator i=all_items.rbegin();i!=all_items.rend();++i) {
+            SPItem *item = *i;
+
+            if (item && (!onlysensitive || !item->isLocked())) {
+                if (!onlyvisible || !dt->itemIsHidden(item)) {
+                    if (!dt->layerManager().isLayer(item)) {
+                        if (!invert || exclude.end() == std::find(exclude.begin(),exclude.end(),item)) {
+                            items.push_back(item); // leave it in the list
+                        }
+                    }
+                }
+            }
+        }
+
+            break;
+        }
+        case PREFS_SELECTION_LAYER_RECURSIVE: {
+            std::vector<SPItem*> x;
+            items = get_all_items(x, dt->layerManager().currentLayer(), dt, onlyvisible, onlysensitive, FALSE, exclude);
+            break;
+        }
+        default: {
+            std::vector<SPItem*> x;
+            items = get_all_items(x, dt->layerManager().currentRoot(), dt, onlyvisible, onlysensitive, FALSE, exclude);
+            break;
+    }
+    }
+
+    selection->setList(items);
+
+}
+
+void sp_edit_select_all(SPDesktop *desktop)
+{
+    sp_edit_select_all_full(desktop, false, false);
+}
+
+void sp_edit_select_all_in_all_layers(SPDesktop *desktop)
+{
+    sp_edit_select_all_full(desktop, true, false);
+}
+
+void sp_edit_invert(SPDesktop *desktop)
+{
+    sp_edit_select_all_full(desktop, false, true);
+}
+
+void sp_edit_invert_in_all_layers(SPDesktop *desktop)
+{
+    sp_edit_select_all_full(desktop, true, true);
+}
+
+Inkscape::XML::Node* ObjectSet::group(int type) {
+    SPDocument *doc = document();
+    if(!doc)
+        return nullptr;
+    if (isEmpty()) {
+        selection_display_message(desktop(), Inkscape::WARNING_MESSAGE, _("Select <b>some objects</b> to group."));
+        return nullptr;
+    }
+    Inkscape::XML::Document *xml_doc = doc->getReprDoc();
+    Inkscape::XML::Node *group = (type == 0) ? xml_doc->createElement("svg:g") : xml_doc->createElement("svg:a");
+
+    std::vector<Inkscape::XML::Node*> p(xmlNodes().begin(), xmlNodes().end());
+    std::sort(p.begin(), p.end(), sp_repr_compare_position_bool);
+    this->clear();
+
+    // Remember the position and parent of the topmost object.
+    gint topmost = p.back()->position();
+    Inkscape::XML::Node *topmost_parent = p.back()->parent();
+
+    for(auto current : p){
+        if (current->parent() == topmost_parent) {
+            Inkscape::XML::Node *spnew = current->duplicate(xml_doc);
+            sp_repr_unparent(current);
+            group->appendChild(spnew);
+            Inkscape::GC::release(spnew);
+            topmost --; // only reduce count for those items deleted from topmost_parent
+        } else { // move it to topmost_parent first
+            std::vector<Inkscape::XML::Node*> temp_clip;
+
+            // At this point, current may already have no item, due to its being a clone whose original is already moved away
+            // So we copy it artificially calculating the transform from its repr->attr("transform") and the parent transform
+            gchar const *t_str = current->attribute("transform");
+            Geom::Affine item_t(Geom::identity());
+            if (t_str)
+                sp_svg_transform_read(t_str, &item_t);
+            auto parent_item = dynamic_cast<SPItem *>(doc->getObjectByRepr(current->parent()));
+            assert(parent_item);
+            item_t *= parent_item->i2doc_affine();
+            // FIXME: when moving both clone and original from a transformed group (either by
+            // grouping into another parent, or by cut/paste) the transform from the original's
+            // parent becomes embedded into original itself, and this affects its clones. Fix
+            // this by remembering the transform diffs we write to each item into an array and
+            // then, if this is clone, looking up its original in that array and pre-multiplying
+            // it by the inverse of that original's transform diff.
+
+            sp_selection_copy_one(current, item_t, temp_clip, xml_doc);
+            sp_repr_unparent(current);
+
+            // paste into topmost_parent (temporarily)
+            std::vector<Inkscape::XML::Node*> copied = sp_selection_paste_impl(doc, doc->getObjectByRepr(topmost_parent), temp_clip);
+            if (!temp_clip.empty())temp_clip.clear() ;
+            if (!copied.empty()) { // if success,
+                // take pasted object (now in topmost_parent)
+                Inkscape::XML::Node *in_topmost = copied.back();
+                // make a copy
+                Inkscape::XML::Node *spnew = in_topmost->duplicate(xml_doc);
+                // remove pasted
+                sp_repr_unparent(in_topmost);
+                // put its copy into group
+                group->appendChild(spnew);
+                Inkscape::GC::release(spnew);
+                copied.clear();
+            }
+        }
+    }
+
+    // Add the new group to the topmost members' parent
+    topmost_parent->addChildAtPos(group, topmost + 1);
+
+    set(doc->getObjectByRepr(group));
+    if (type == 0) {
+        DocumentUndo::done(doc, _("Group"), INKSCAPE_ICON("object-group"));
+    } else {
+        DocumentUndo::done(doc, _("Anchor"), INKSCAPE_ICON("object-group"));
+    }
+
+    return group;
+}
+
+void ObjectSet::popFromGroup(){
+    if (isEmpty()) {
+        selection_display_message(desktop(), Inkscape::WARNING_MESSAGE, _("<b>No objects selected</b> to pop out of group."));
+        return;
+    }
+
+    std::set<SPObject*> grandparents;
+
+    for (auto *obj : items()) {
+        auto parent_group = dynamic_cast<SPGroup *>(obj->parent);
+        if (!parent_group || !parent_group->parent || SP_IS_LAYER(parent_group)) {
+            selection_display_message(desktop(), Inkscape::WARNING_MESSAGE, _("Selection <b>not in a group</b>."));
+            return;
+        }
+        grandparents.insert(parent_group->parent);
+    }
+
+    assert(!grandparents.empty());
+
+    if (grandparents.size() > 1) {
+        selection_display_message(desktop(), Inkscape::WARNING_MESSAGE,
+                                  _("Objects in selection must have the same grandparents."));
+        return;
+    }
+
+    toLayer(*grandparents.begin(), true);
+
+    if(document())
+        DocumentUndo::done(document(), _("Pop selection from group"), INKSCAPE_ICON("object-ungroup-pop-selection"));
+
+}
+
+/**
+ * Finds the first clone in `objects` which references an item in `groups`.
+ * The search is recursive, the children of `objects` are searched as well.
+ * Return NULL if no such clone is found.
+ */
+template <typename Objects>
+static SPUse *find_clone_to_group(Objects const &objects, std::set<SPGroup *> const &groups)
+{
+    assert(!groups.count(nullptr));
+
+    for (auto *obj : objects) {
+        if (auto *use = dynamic_cast<SPUse *>(obj)) {
+            if (auto root = use->root()) {
+                if (groups.count(static_cast<SPGroup *>(root->clone_original))) {
+                    return use;
+                }
+            }
+        }
+
+        if (auto *use = find_clone_to_group(obj->childList(false), groups)) {
+            return use;
+        }
+    }
+
+    return nullptr;
+}
+
+/**
+ * Ungroup all groups in an object set.
+ *
+ * Clones of ungrouped groups will be unlinked.
+ *
+ * Children of groups will not be ungrouped (operation is not recursive).
+ *
+ * Unlinked clones and children of ungrouped groups will be added to the object set.
+ */
+static void ungroup_impl(ObjectSet *set)
+{
+    std::set<SPGroup *> const groups(set->groups().begin(), set->groups().end());
+
+    while (auto *use = find_clone_to_group(set->items(), groups)) {
+        bool const readd = set->includes(use);
+        auto const unlinked = use->unlink();
+        if (readd) {
+            set->add(unlinked, true);
+        }
+    }
+
+    std::vector<SPItem *> children;
+
+    for (auto *group : groups) {
+        sp_item_group_ungroup(group, children, false);
+    }
+
+    set->addList(children);
+}
+
+void ObjectSet::ungroup(bool skip_undo)
+{
+    if (isEmpty()) {
+        if(desktop())
+            selection_display_message(desktop(), Inkscape::WARNING_MESSAGE, _("Select a <b>group</b> to ungroup."));
+        return;
+    }
+
+    if (boost::distance(groups()) == 0) {
+        if(desktop())
+            selection_display_message(desktop(), Inkscape::ERROR_MESSAGE, _("<b>No groups</b> to ungroup in the selection."));
+        return;
+    }
+
+    ungroup_impl(this);
+    std::vector<SPItem*> selection(items().begin(), items().end());
+    for (auto item : selection) {
+        SPLPEItem *lpeitem = dynamic_cast<SPLPEItem *>(item);
+        if (lpeitem) {
+            for (auto *lpe : lpeitem->getPathEffects()) {
+                if (lpe) {
+                    //lpe->doOnOpen(lpeitem);
+                    for (auto & p : lpe->param_vector) {
+                        p->read_from_SVG();
+                        p->update_satellites(true);
+                    }
+                }
+            }
+        }
+    }
+    if(document() && !skip_undo)
+        DocumentUndo::done(document(), _("Ungroup"), INKSCAPE_ICON("object-ungroup"));
+}
+
+// TODO replace it with ObjectSet::degroup_list
+
+/** Replace all groups in the list with their member objects, recursively; returns a new list, frees old */
+std::vector<SPItem*>
+sp_degroup_list(std::vector<SPItem*> &items)
+{
+    std::vector<SPItem*> out;
+    bool has_groups = false;
+    for (auto item : items) {
+        SPGroup *group = dynamic_cast<SPGroup *>(item);
+        if (!group) {
+            out.push_back(item);
+        } else {
+            has_groups = true;
+            std::vector<SPItem*> members = sp_item_group_item_list(group);
+            for (auto member : members) {
+                out.push_back(member);
+            }
+            members.clear();
+        }
+    }
+
+    if (has_groups) { // recurse if we unwrapped a group - it may have contained others
+        out = sp_degroup_list(out);
+    }
+
+    return out;
+}
+
+
+/** If items in the list have a common parent, return it, otherwise return NULL */
+static SPGroup *
+sp_item_list_common_parent_group(const SPItemRange &items)
+{
+    if (items.empty()) {
+        return nullptr;
+    }
+    SPObject *parent = items.front()->parent;
+    // Strictly speaking this CAN happen, if user selects <svg> from Inkscape::XML editor
+    if (!dynamic_cast<SPGroup *>(parent)) {
+        return nullptr;
+    }
+    for (auto item=items.begin();item!=items.end();++item) {
+        if((*item)==items.front())continue;
+        if ((*item)->parent != parent) {
+            return nullptr;
+        }
+    }
+
+    return dynamic_cast<SPGroup *>(parent);
+}
+
+/** Finds out the minimum common bbox of the selected items. */
+static Geom::OptRect
+enclose_items(std::vector<SPItem*> const &items)
+{
+    g_assert(!items.empty());
+
+    Geom::OptRect r;
+    for (auto item : items) {
+        r.unionWith(item->documentVisualBounds());
+    }
+    return r;
+}
+
+// TODO determine if this is intentionally different from SPObject::getPrev()
+static SPObject *prev_sibling(SPObject *child)
+{
+    SPObject *prev = nullptr;
+    if ( child && dynamic_cast<SPGroup *>(child->parent) ) {
+        prev = child->getPrev();
+    }
+    return prev;
+}
+
+void ObjectSet::raise(bool skip_undo){
+
+    if(isEmpty()){
+        selection_display_message(desktop(), Inkscape::WARNING_MESSAGE, _("Select <b>object(s)</b> to raise."));
+        return;
+    }
+
+    SPGroup const *group = sp_item_list_common_parent_group(items());
+    if (!group) {
+        if(desktop())
+            selection_display_message(desktop(), Inkscape::ERROR_MESSAGE, _("You cannot raise/lower objects from <b>different groups</b> or <b>layers</b>."));
+        return;
+    }
+
+    std::vector<SPItem*> items_copy(items().begin(), items().end());
+    Inkscape::XML::Node *grepr = const_cast<Inkscape::XML::Node *>(items_copy.front()->parent->getRepr());
+
+    /* Construct reverse-ordered list of selected children. */
+    std::vector<SPItem*> rev(items_copy);
+    sort(rev.begin(),rev.end(),sp_item_repr_compare_position_bool);
+
+    // Determine the common bbox of the selected items.
+    Geom::OptRect selected = enclose_items(items_copy);
+
+    // Iterate over all objects in the selection (starting from top).
+    if (selected) {
+        for (auto child : rev) {
+            // for each selected object, find the next sibling
+            for (SPObject *newref = child->getNext(); newref; newref = newref->getNext()) {
+                // if the sibling is an item AND overlaps our selection,
+                SPItem *newItem = dynamic_cast<SPItem *>(newref);
+                if (newItem) {
+                    Geom::OptRect newref_bbox = newItem->documentVisualBounds();
+                    if ( newref_bbox && selected->intersects(*newref_bbox) ) {
+                        // AND if it's not one of our selected objects,
+                        if ( std::find(items_copy.begin(),items_copy.end(),newref)==items_copy.end()) {
+                            // move the selected object after that sibling
+                            grepr->changeOrder(child->getRepr(), newref->getRepr());
+                        }
+                        break;
+                    }
+                }
+            }
+        }
+    }
+    if (document() && !skip_undo) {
+        DocumentUndo::done(document(), C_("Undo action", "Raise"), INKSCAPE_ICON("selection-raise"));
+    }
+}
+
+
+void ObjectSet::raiseToTop(bool skip_undo) {
+    if (isEmpty()) {
+        selection_display_message(desktop(), Inkscape::WARNING_MESSAGE, _("Select <b>object(s)</b> to raise."));
+        return;
+    }
+
+    SPGroup const *group = sp_item_list_common_parent_group(items());
+    if (!group) {
+        selection_display_message(desktop(), Inkscape::ERROR_MESSAGE, _("You cannot raise/lower objects from <b>different groups</b> or <b>layers</b>."));
+        return;
+    }
+
+
+    std::vector<Inkscape::XML::Node*> rl(xmlNodes().begin(), xmlNodes().end());
+    sort(rl.begin(),rl.end(),sp_repr_compare_position_bool);
+
+    for (auto repr : rl) {
+        repr->setPosition(-1);
+    }
+    if (document() && !skip_undo) {
+        DocumentUndo::done(document(), _("Raise to top"), INKSCAPE_ICON("selection-top"));
+    }
+}
+
+void ObjectSet::lower(bool skip_undo){
+    if(isEmpty()){
+        selection_display_message(desktop(), Inkscape::WARNING_MESSAGE, _("Select <b>object(s)</b> to lower."));
+        return;
+    }
+
+    SPGroup const *group = sp_item_list_common_parent_group(items());
+    if (!group) {
+        selection_display_message(desktop(), Inkscape::ERROR_MESSAGE, _("You cannot raise/lower objects from <b>different groups</b> or <b>layers</b>."));
+        return;
+    }
+
+    std::vector<SPItem*> items_copy(items().begin(), items().end());
+    Inkscape::XML::Node *grepr = const_cast<Inkscape::XML::Node *>(items_copy.front()->parent->getRepr());
+
+    // Determine the common bbox of the selected items.
+    Geom::OptRect selected = enclose_items(items_copy);
+
+    /* Construct direct-ordered list of selected children. */
+    std::vector<SPItem*> rev(items_copy);
+    sort(rev.begin(),rev.end(),sp_item_repr_compare_position_bool);
+
+    // Iterate over all objects in the selection (starting from top).
+    if (selected) {
+        for (std::vector<SPItem*>::const_reverse_iterator item=rev.rbegin();item!=rev.rend();++item) {
+            SPObject *child = *item;
+            // for each selected object, find the prev sibling
+            for (SPObject *newref = prev_sibling(child); newref; newref = prev_sibling(newref)) {
+                // if the sibling is an item AND overlaps our selection,
+                SPItem *newItem = dynamic_cast<SPItem *>(newref);
+                if (newItem) {
+                    Geom::OptRect ref_bbox = newItem->documentVisualBounds();
+                    if ( ref_bbox && selected->intersects(*ref_bbox) ) {
+                        // AND if it's not one of our selected objects,
+                        if (items_copy.end()==std::find(items_copy.begin(),items_copy.end(),newref)) {
+                            // move the selected object before that sibling
+                            SPObject *put_after = prev_sibling(newref);
+                            if (put_after)
+                                grepr->changeOrder(child->getRepr(), put_after->getRepr());
+                            else
+                                child->getRepr()->setPosition(0);
+                        }
+                        break;
+                    }
+                }
+            }
+        }
+    }
+    if(document() && !skip_undo)
+        DocumentUndo::done(document(), C_("Undo action", "Lower"), INKSCAPE_ICON("selection-lower"));
+}
+
+
+void ObjectSet::lowerToBottom(bool skip_undo){
+    if(!document())
+        return;
+    if (isEmpty()) {
+        selection_display_message(desktop(), Inkscape::WARNING_MESSAGE, _("Select <b>object(s)</b> to lower to bottom."));
+        return;
+    }
+
+    SPGroup const *group = sp_item_list_common_parent_group(items());
+    if (!group) {
+        selection_display_message(desktop(), Inkscape::ERROR_MESSAGE, _("You cannot raise/lower objects from <b>different groups</b> or <b>layers</b>."));
+        return;
+    }
+
+    std::vector<Inkscape::XML::Node*> rl(xmlNodes().begin(), xmlNodes().end());
+    sort(rl.begin(),rl.end(),sp_repr_compare_position_bool);
+
+    for (std::vector<Inkscape::XML::Node*>::const_reverse_iterator l=rl.rbegin();l!=rl.rend();++l) {
+        gint minpos;
+        SPObject *pp;
+        Inkscape::XML::Node *repr = (*l);
+        pp = document()->getObjectByRepr(repr->parent());
+        minpos = 0;
+        g_assert(dynamic_cast<SPGroup *>(pp));
+        for (auto& pc: pp->children) {
+            if(dynamic_cast<SPItem *>(&pc)) {
+                break;
+            }
+            minpos += 1;
+        }
+        repr->setPosition(minpos);
+    }
+    if (document() && !skip_undo) {
+        DocumentUndo::done(document(), _("Lower to bottom"), INKSCAPE_ICON("selection-bottom"));
+    }
+}
+
+void ObjectSet::stackUp(bool skip_undo) {
+    if (isEmpty()) {
+        selection_display_message(desktop(), Inkscape::WARNING_MESSAGE, _("Select <b>object(s)</b> to stack up."));
+        return;
+    }
+
+    std::vector<SPItem*> selection(items().begin(), items().end());
+    sort(selection.begin(), selection.end(), sp_item_repr_compare_position_bool);
+
+    for (auto item: selection | boost::adaptors::reversed) {
+        if (!item->raiseOne()) { // stop if top was reached
+            if(document() && !skip_undo)
+                DocumentUndo::cancel(document());
+            selection_display_message(desktop(), Inkscape::WARNING_MESSAGE, _("We hit top."));
+            return;
+        }
+    }
+
+    if(document() && !skip_undo)
+        DocumentUndo::done(document(), C_("Undo action", "stack up"), INKSCAPE_ICON("layer-raise"));
+}
+
+void ObjectSet::stackDown(bool skip_undo) {
+    if (isEmpty()) {
+        selection_display_message(desktop(), Inkscape::WARNING_MESSAGE, _("Select <b>object(s)</b> to stack down."));
+        return;
+    }
+
+    std::vector<SPItem*> selection(items().begin(), items().end());
+    sort(selection.begin(), selection.end(), sp_item_repr_compare_position_bool);
+
+    for (auto item: selection) {
+        if (!item->lowerOne()) { // stop if bottom was reached
+            if(document() && !skip_undo)
+                DocumentUndo::cancel(document());
+            selection_display_message(desktop(), Inkscape::WARNING_MESSAGE, _("We hit bottom."));
+            return;
+        }
+    }
+
+    if (document() && !skip_undo) {
+        DocumentUndo::done(document(), C_("Undo action", "stack down"), INKSCAPE_ICON("layer-lower"));
+    }
+}
+
+void
+sp_undo(SPDesktop *desktop, SPDocument *)
+{
+    // No re/undo while dragging, too dangerous.
+    if (desktop->getCanvas()->is_dragging()) return;
+
+    if (!DocumentUndo::undo(desktop->getDocument())) {
+        desktop->messageStack()->flash(Inkscape::WARNING_MESSAGE, _("Nothing to undo."));
+    }
+}
+
+void
+sp_redo(SPDesktop *desktop, SPDocument *)
+{
+    // No re/undo while dragging, too dangerous.
+    if (desktop->getCanvas()->is_dragging()) return;
+
+    if (!DocumentUndo::redo(desktop->getDocument())) {
+        desktop->messageStack()->flash(Inkscape::WARNING_MESSAGE, _("Nothing to redo."));
+    }
+}
+
+void ObjectSet::cut()
+{
+    copy();
+
+    // Text and Node tools have their own CUT responses instead of deleteItems
+    if(dynamic_cast<TextTool*>(desktop()->event_context)) {
+        if (Inkscape::UI::Tools::sp_text_delete_selection(desktop()->event_context)) {
+            DocumentUndo::done(desktop()->getDocument(), _("Cut text"), INKSCAPE_ICON("draw-text"));
+            return;
+        }
+    }
+
+    auto node_tool = dynamic_cast<Inkscape::UI::Tools::NodeTool *>(desktop()->event_context);
+    if (node_tool && node_tool->_selected_nodes) {
+        Inkscape::Preferences *prefs = Inkscape::Preferences::get();
+        // This takes care of undo internally
+        node_tool->_multipath->deleteNodes(prefs->getBool("/tools/nodes/delete_preserves_shape", true));
+        return;
+    }
+
+    deleteItems();
+}
+
+/**
+ * \pre item != NULL
+ */
+SPCSSAttr *
+take_style_from_item(SPObject *object)
+{
+    // CPPIFY:
+    // This function should only take SPItems, but currently SPString is not an Item.
+
+    // write the complete cascaded style, context-free
+    SPCSSAttr *css = sp_css_attr_from_object(object, SP_STYLE_FLAG_ALWAYS);
+    if (css == nullptr)
+        return nullptr;
+
+    if ((dynamic_cast<SPGroup *>(object) && object->firstChild()) ||
+        (dynamic_cast<SPText *>(object) && object->firstChild() && object->firstChild()->getNext() == nullptr)) {
+        // if this is a text with exactly one tspan child, merge the style of that tspan as well
+        // If this is a group, merge the style of its topmost (last) child with style
+        auto list = object->children | boost::adaptors::reversed;
+        for (auto& element: list) {
+            if (element.style ) {
+                SPCSSAttr *temp = sp_css_attr_from_object(&element, SP_STYLE_FLAG_IFSET);
+                if (temp) {
+                    sp_repr_css_merge(css, temp);
+                    sp_repr_css_attr_unref(temp);
+                }
+                break;
+            }
+        }
+    }
+
+    // Remove black-listed properties (those that should not be used in a default style)
+    css = sp_css_attr_unset_blacklist(css);
+
+    if (!(dynamic_cast<SPText *>(object) || dynamic_cast<SPTSpan *>(object) || dynamic_cast<SPTRef *>(object) || dynamic_cast<SPString *>(object))) {
+        // do not copy text properties from non-text objects, it's confusing
+        css = sp_css_attr_unset_text(css);
+    }
+
+
+    SPItem *item = dynamic_cast<SPItem *>(object);
+    if (item) {
+        // FIXME: also transform gradient/pattern fills, by forking? NO, this must be nondestructive
+        double ex = item->i2doc_affine().descrim();
+        if (ex != 1.0) {
+            css = sp_css_attr_scale(css, ex);
+        }
+    }
+
+    return css;
+}
+
+void ObjectSet::copy()
+{
+    Inkscape::UI::ClipboardManager *cm = Inkscape::UI::ClipboardManager::get();
+    cm->copy(this);
+}
+
+void sp_selection_paste(SPDesktop *desktop, bool in_place)
+{
+    Inkscape::UI::ClipboardManager *cm = Inkscape::UI::ClipboardManager::get();
+    if (cm->paste(desktop, in_place)) {
+        DocumentUndo::done(desktop->getDocument(), _("Paste"), INKSCAPE_ICON("edit-paste"));
+    }
+}
+
+void ObjectSet::pasteStyle()
+{
+    Inkscape::UI::ClipboardManager *cm = Inkscape::UI::ClipboardManager::get();
+    if (cm->pasteStyle(this)) {
+        DocumentUndo::done(document(), _("Paste style"), INKSCAPE_ICON("edit-paste-style"));
+    }
+}
+
+void ObjectSet::pastePathEffect()
+{
+    Inkscape::UI::ClipboardManager *cm = Inkscape::UI::ClipboardManager::get();
+    if (cm->pastePathEffect(this)) {
+        DocumentUndo::done(document(), _("Paste live path effect"), "");
+    }
+}
+
+
+static void sp_selection_remove_livepatheffect_impl(SPItem *item)
+{
+    if ( SPLPEItem *lpeitem = dynamic_cast<SPLPEItem*>(item) ) {
+        if ( lpeitem->hasPathEffect() ) {
+            lpeitem->removeAllPathEffects(false);
+        }
+    }
+}
+
+void ObjectSet::removeLPE()
+{
+
+    // check if something is selected
+    if (isEmpty()) {
+        if(desktop())
+        desktop()->messageStack()->flash(Inkscape::WARNING_MESSAGE, _("Select <b>object(s)</b> to remove live path effects from."));
+        return;
+    }
+    auto list= items();
+    for (auto itemlist=list.begin();itemlist!=list.end();++itemlist) {
+        SPItem *item = *itemlist;
+
+        sp_selection_remove_livepatheffect_impl(item);
+
+    }
+
+    if (document()) {
+        DocumentUndo::done(document(), _("Remove live path effect"), "");
+    }
+}
+
+void ObjectSet::removeFilter()
+{
+    // check if something is selected
+    if (isEmpty()) {
+        if(desktop())
+            desktop()->messageStack()->flash(Inkscape::WARNING_MESSAGE, _("Select <b>object(s)</b> to remove filters from."));
+        return;
+    }
+
+    SPCSSAttr *css = sp_repr_css_attr_new();
+    sp_repr_css_unset_property(css, "filter");
+    if (SPDesktop *d = desktop()) {
+        sp_desktop_set_style(this, desktop(), css);
+        // Refreshing the current tool (by switching to same tool)
+        // will refresh tool's private information in it's selection context that
+        // depends on desktop items.
+        set_active_tool (d, get_active_tool(d));
+    } else {
+        auto list = items();
+        for (auto itemlist=list.begin();itemlist!=list.end();++itemlist) {
+            sp_desktop_apply_css_recursive(*itemlist, css, true);
+        }
+    }
+    sp_repr_css_attr_unref(css);
+    if (document()) {
+        DocumentUndo::done(document(), _("Remove filter"), "");
+    }
+}
+
+
+void ObjectSet::pasteSize(bool apply_x, bool apply_y)
+{
+    Inkscape::UI::ClipboardManager *cm = Inkscape::UI::ClipboardManager::get();
+    if (cm->pasteSize(this, false, apply_x, apply_y)) {
+        DocumentUndo::done(document(), _("Paste size"), INKSCAPE_ICON("edit-paste-size"));
+    }
+}
+
+void ObjectSet::pasteSizeSeparately(bool apply_x, bool apply_y)
+{
+    Inkscape::UI::ClipboardManager *cm = Inkscape::UI::ClipboardManager::get();
+    if (cm->pasteSize(this, true, apply_x, apply_y)) {
+        DocumentUndo::done(document(), _("Paste size separately"), INKSCAPE_ICON("edit-paste-size-separately"));
+    }
+}
+
+/**
+ * Ensures that the clones of objects are not modified when moving objects between layers.
+ * Calls the same function as ungroup
+ */
+void sp_selection_change_layer_maintain_clones(std::vector<SPItem*> const &items,SPObject *where)
+{
+    for (auto item : items) {
+        if (item) {
+            SPItem *oldparent = dynamic_cast<SPItem *>(item->parent);
+            SPItem *newparent = dynamic_cast<SPItem *>(where);
+            sp_item_group_ungroup_handle_clones(item,
+                    (oldparent->i2doc_affine())
+                    *((newparent->i2doc_affine()).inverse()));
+        }
+    }
+}
+
+void ObjectSet::toNextLayer(bool skip_undo)
+{
+    if (!desktop()) {
+        return;
+    }
+    SPDesktop *dt=desktop(); //TODO make it desktop-independent
+
+    // check if something is selected
+    if (isEmpty()) {
+        dt->messageStack()->flash(Inkscape::WARNING_MESSAGE, _("Select <b>object(s)</b> to move to the layer above."));
+        return;
+    }
+
+    std::vector<SPItem*> items_copy(items().begin(), items().end());
+
+    bool no_more = false; // Set to true, if no more layers above
+    SPObject *next=Inkscape::next_layer(dt->layerManager().currentRoot(), dt->layerManager().currentLayer());
+    if (next) {
+        clear();
+        sp_selection_change_layer_maintain_clones(items_copy,next);
+        std::vector<Inkscape::XML::Node*> temp_clip;
+        sp_selection_copy_impl(items_copy, temp_clip, dt->doc()->getReprDoc());
+        sp_selection_delete_impl(items_copy, false, false);
+        next=Inkscape::next_layer(dt->layerManager().currentRoot(), dt->layerManager().currentLayer()); // Fixes bug 1482973: crash while moving layers
+        std::vector<Inkscape::XML::Node*> copied;
+        if (next) {
+            copied = sp_selection_paste_impl(dt->getDocument(), next, temp_clip);
+        } else {
+            copied = sp_selection_paste_impl(dt->getDocument(), dt->layerManager().currentLayer(), temp_clip);
+            no_more = true;
+        }
+        setReprList(copied);
+        if (next) dt->layerManager().setCurrentLayer(next);
+        if ( !skip_undo ) {
+            DocumentUndo::done(dt->getDocument(), _("Raise to next layer"), INKSCAPE_ICON("selection-move-to-layer-above"));
+        }
+    } else {
+        no_more = true;
+    }
+
+    if (no_more) {
+        dt->messageStack()->flash(Inkscape::WARNING_MESSAGE, _("No more layers above."));
+    }
+
+}
+
+void ObjectSet::toPrevLayer(bool skip_undo)
+{
+    if (!desktop()) {
+        return;
+    }
+    SPDesktop *dt=desktop(); //TODO make it desktop-independent
+
+    // check if something is selected
+    if (isEmpty()) {
+        dt->messageStack()->flash(Inkscape::WARNING_MESSAGE, _("Select <b>object(s)</b> to move to the layer below."));
+        return;
+    }
+
+    std::vector<SPItem*> items_copy(items().begin(), items().end());
+
+    bool no_more = false; // Set to true, if no more layers below
+    SPObject *next=Inkscape::previous_layer(dt->layerManager().currentRoot(), dt->layerManager().currentLayer());
+    if (next) {
+        clear();
+        sp_selection_change_layer_maintain_clones(items_copy,next);
+        std::vector<Inkscape::XML::Node*> temp_clip;
+        sp_selection_copy_impl(items_copy, temp_clip, dt->doc()->getReprDoc()); // we're in the same doc, so no need to copy defs
+        sp_selection_delete_impl(items_copy, false, false);
+        next=Inkscape::previous_layer(dt->layerManager().currentRoot(), dt->layerManager().currentLayer()); // Fixes bug 1482973: crash while moving layers
+        std::vector<Inkscape::XML::Node*> copied;
+        if (next) {
+            copied = sp_selection_paste_impl(dt->getDocument(), next, temp_clip);
+        } else {
+            copied = sp_selection_paste_impl(dt->getDocument(), dt->layerManager().currentLayer(), temp_clip);
+            no_more = true;
+        }
+        setReprList( copied);
+        if (next) dt->layerManager().setCurrentLayer(next);
+        if ( !skip_undo ) {
+            DocumentUndo::done(dt->getDocument(), _("Lower to previous layer"), INKSCAPE_ICON("selection-move-to-layer-below"));
+        }
+    } else {
+        no_more = true;
+    }
+
+    if (no_more) {
+        dt->messageStack()->flash(Inkscape::WARNING_MESSAGE, _("No more layers below."));
+    }
+}
+
+/**
+ * Move selection to group `moveto`, after the last child of `moveto` (if it has any children).
+ *
+ * @param moveto Layer to move to
+ * @param skip_undo Don't call DocumentUndo::done
+ *
+ * @pre moveto is of type SPItem (or even SPGroup?)
+ */
+void ObjectSet::toLayer(SPObject *moveto, bool skip_undo)
+{
+    if(!document())
+        return;
+
+    if (!moveto || !moveto->getRepr()) {
+        g_warning("%s moveto is NULL", __func__);
+        g_assert_not_reached();
+        return;
+    }
+
+    toLayer(moveto, skip_undo, moveto->getRepr()->lastChild());
+}
+
+/**
+ * Move selection to group `moveto`, after child `after`.
+ */
+void ObjectSet::toLayer(SPObject *moveto, bool skip_undo, Inkscape::XML::Node *after)
+{
+    assert(moveto);
+    assert(!after || after->parent() == moveto->getRepr());
+    assert(document());
+
+    SPDesktop *dt = desktop();
+
+    // check if something is selected
+    if (isEmpty()) {
+        if(dt)
+            dt->messageStack()->flash(Inkscape::WARNING_MESSAGE, _("Select <b>object(s)</b> to move."));
+        return;
+    }
+
+    // check for aliasing: the object corresponding to `after` shouldn't belong to us:
+    if (after) {
+        auto obj = document()->getObjectByRepr(after);
+        if (obj && includes(obj)) {
+            return;
+        }
+    }
+
+    std::vector<SPItem*> items_copy(items().begin(), items().end());
+
+    if (moveto) {
+        clear();
+        sp_selection_change_layer_maintain_clones(items_copy,moveto);
+        std::vector<Inkscape::XML::Node*> temp_clip;
+        sp_selection_copy_impl(items_copy, temp_clip, document()->getReprDoc()); // we're in the same doc, so no need to copy defs
+        sp_selection_delete_impl(items_copy, false, false);
+        std::vector<Inkscape::XML::Node*> copied = sp_selection_paste_impl(document(), moveto, temp_clip, after);
+        setReprList(copied);
+        if (!temp_clip.empty()) temp_clip.clear();
+        if (moveto && dt) dt->layerManager().setCurrentLayer(moveto);
+        if (!skip_undo) {
+            DocumentUndo::done(document(), _("Move selection to layer"), INKSCAPE_ICON("selection-move-to-layer"));
+        }
+    }
+}
+
+static bool
+object_set_contains_original(SPItem *item, ObjectSet *set)
+{
+    bool contains_original = false;
+
+    SPItem *item_use = item;
+    SPItem *item_use_first = item;
+    SPUse *use = dynamic_cast<SPUse *>(item_use);
+    while (use && item_use && !contains_original)
+    {
+        item_use = use->get_original();
+        use = dynamic_cast<SPUse *>(item_use);
+        contains_original |= set->includes(item_use);
+        if (item_use == item_use_first)
+            break;
+    }
+
+    // If it's a tref, check whether the object containing the character
+    // data is part of the selection
+    SPTRef *tref = dynamic_cast<SPTRef *>(item);
+    if (!contains_original && tref) {
+        contains_original = set->includes(tref->getObjectReferredTo());
+    }
+
+    return contains_original;
+}
+
+
+static bool
+object_set_contains_both_clone_and_original(ObjectSet *set)
+{
+    bool clone_with_original = false;
+    auto items = set->items();
+    for (auto l=items.begin();l!=items.end() ;++l) {
+        SPItem *item = *l;
+        if (item) {
+            clone_with_original |= object_set_contains_original(item, set);
+            if (clone_with_original)
+                break;
+        }
+    }
+    return clone_with_original;
+}
+
+/** Apply matrix to the selection.  \a set_i2d is normally true, which means objects are in the
+original transform, synced with their reprs, and need to jump to the new transform in one go. A
+value of set_i2d==false is only used by seltrans when it's dragging objects live (not outlines); in
+that case, items are already in the new position, but the repr is in the old, and this function
+then simply updates the repr from item->transform.
+ */
+
+void ObjectSet::applyAffine(Geom::Affine const &affine, bool set_i2d, bool compensate,
+                                bool adjust_transf_center)
+{
+    if (isEmpty())
+        return;
+
+    // For each perspective with a box in selection, check whether all boxes are selected and
+    // unlink all non-selected boxes.
+    Persp3D *persp;
+    Persp3D *transf_persp;
+    std::list<Persp3D *> plist = perspList();
+    for (auto & i : plist) {
+        persp = (Persp3D *) i;
+
+        if (persp) {
+            if (!persp->has_all_boxes_in_selection (this)) {
+                // create a new perspective as a copy of the current one
+                transf_persp = Persp3D::create_xml_element (persp->document);
+
+                std::list<SPBox3D *> selboxes = box3DList(persp);
+
+                for (auto & selboxe : selboxes) {
+                    selboxe->switch_perspectives(persp, transf_persp);
+                }
+            } else {
+                transf_persp = persp;
+            }
+
+            transf_persp->apply_affine_transformation(affine);
+        }
+    }
+    auto items_copy = items();
+    std::vector<SPItem *> ordered_items;
+    for (auto l=items_copy.begin();l!=items_copy.end() ;++l) {
+        SPItem *item = *l;
+        SPLPEItem *clonelpe = dynamic_cast<SPLPEItem *>(item);
+        if (clonelpe && clonelpe->hasPathEffectOfType(Inkscape::LivePathEffect::CLONE_ORIGINAL)) {
+            ordered_items.insert(ordered_items.begin(), item);
+        } else {
+            ordered_items.push_back(item);
+        }
+    }
+    for (auto item : ordered_items) {
+        if( dynamic_cast<SPRoot *>(item) ) {
+            // An SVG element cannot have a transform. We could change 'x' and 'y' in response
+            // to a translation... but leave that for another day.
+            if(desktop())
+                desktop()->messageStack()->flash(Inkscape::WARNING_MESSAGE, _("Cannot transform an embedded SVG."));
+            break;
+        }
+
+        Geom::Point old_center(0,0);
+        if (set_i2d && item->isCenterSet())
+            old_center = item->getCenter();
+
+        // If we're moving a connector, we want to detach it
+        // from shapes that aren't part of the selection, but
+        // leave it attached if they are
+        if (Inkscape::UI::Tools::cc_item_is_connector(item)) {
+            SPPath *path = dynamic_cast<SPPath *>(item);
+            if (path) {
+                SPItem *attItem[2] = {nullptr, nullptr};
+                path->connEndPair.getAttachedItems(attItem);
+                for (int n = 0; n < 2; ++n) {
+                    if (!includes(attItem[n])) {
+                        sp_conn_end_detach(item, n);
+                    }
+                }
+            } else {
+                g_assert_not_reached();
+            }
+        }
+
+        // "clones are unmoved when original is moved" preference
+        Inkscape::Preferences *prefs = Inkscape::Preferences::get();
+        int compensation = prefs->getInt("/options/clonecompensation/value", SP_CLONE_COMPENSATION_UNMOVED);
+        bool prefs_unmoved = (compensation == SP_CLONE_COMPENSATION_UNMOVED);
+        bool prefs_parallel = (compensation == SP_CLONE_COMPENSATION_PARALLEL);
+
+        SiblingState sibling_state = getSiblingState(item);
+
+        /* If this is a clone and it's selected along with its original, do not move it;
+         * it will feel the transform of its original and respond to it itself.
+         * Without this, a clone is doubly transformed, very unintuitive.
+         *
+         * Same for textpath if we are also doing ANY transform to its path: do not touch textpath,
+         * letters cannot be squeezed or rotated anyway, they only refill the changed path.
+         * Same for linked offset if we are also moving its source: do not move it. */
+        if (sibling_state == SiblingState::SIBLING_TEXT_PATH) {
+            // Restore item->transform field from the repr, in case it was changed by seltrans.
+            item->readAttr(SPAttr::TRANSFORM);
+        } else if (sibling_state == SiblingState::SIBLING_TEXT_FLOW_FRAME) {
+            // apply the inverse of the region's transform to the <use> so that the flow remains
+            // the same (even though the output itself gets transformed)
+            for (auto& region: item->children) {
+                if (dynamic_cast<SPFlowregion *>(&region) || dynamic_cast<SPFlowregionExclude *>(&region)) {
+                    for (auto& itm: region.children) {
+                        SPUse *use = dynamic_cast<SPUse *>(&itm);
+                        if ( use ) {
+                            use->doWriteTransform(item->transform.inverse(), nullptr, compensate);
+                        }
+                    }
+                }
+            }
+        } else if (sibling_state == SiblingState::SIBLING_CLONE_ORIGINAL || sibling_state == SiblingState::SIBLING_OFFSET_SOURCE) {
+            // We are transforming a clone along with its original. The below matrix juggling is
+            // necessary to ensure that they transform as a whole, i.e. the clone's induced
+            // transform and its move compensation are both cancelled out.
+
+            // restore item->transform field from the repr, in case it was changed by seltrans
+            item->readAttr(SPAttr::TRANSFORM);
+
+            // calculate the matrix we need to apply to the clone to cancel its induced transform from its original
+            Geom::Affine parent2dt;
+            {
+                SPItem *parentItem = dynamic_cast<SPItem *>(item->parent);
+                if (parentItem) {
+                    parent2dt = parentItem->i2dt_affine();
+                } else {
+                    g_assert_not_reached();
+                }
+            }
+            Geom::Affine t = parent2dt * affine * parent2dt.inverse();
+            Geom::Affine t_inv = t.inverse();
+            Geom::Affine result = t_inv * item->transform * t;
+
+            if (sibling_state == SiblingState::SIBLING_CLONE_ORIGINAL && (prefs_parallel || prefs_unmoved) && affine.isTranslation()) {
+                // we need to cancel out the move compensation, too
+
+                // find out the clone move, same as in sp_use_move_compensate
+                Geom::Affine parent;
+                {
+                    SPUse *use = dynamic_cast<SPUse *>(item);
+                    if (use) {
+                        parent = use->get_parent_transform();
+                    } else {
+                        g_assert_not_reached();
+                    }
+                }
+                Geom::Affine clone_move = parent.inverse() * t * parent;
+
+                if (prefs_parallel) {
+                    Geom::Affine move = result * clone_move * t_inv;
+                    item->doWriteTransform(move, &move, compensate);
+
+                } else if (prefs_unmoved) {
+                    //if (dynamic_cast<SPUse *>(sp_use_get_original(dynamic_cast<SPUse *>(item))))
+                    //    clone_move = Geom::identity();
+                    Geom::Affine move = result * clone_move;
+                    item->doWriteTransform(move, &t, compensate);
+                }
+
+            } else if (sibling_state == SiblingState::SIBLING_OFFSET_SOURCE && (prefs_parallel || prefs_unmoved) && affine.isTranslation()){
+                Geom::Affine parent = item->transform;
+                Geom::Affine offset_move = parent.inverse() * t * parent;
+
+                if (prefs_parallel) {
+                    Geom::Affine move = result * offset_move * t_inv;
+                    item->doWriteTransform(move, &move, compensate);
+
+                } else if (prefs_unmoved) {
+                    Geom::Affine move = result * offset_move;
+                    item->doWriteTransform(move, &t, compensate);
+                }
+
+            } else {
+                // just apply the result
+                item->doWriteTransform(result, &t, compensate);
+            }
+        } else if (sibling_state == SiblingState::SIBLING_TEXT_SHAPE_INSIDE) {
+            item->readAttr(SPAttr::TRANSFORM);
+
+        } else {
+            if (set_i2d) {
+                item->set_i2d_affine(item->i2dt_affine() * (Geom::Affine)affine);
+            }
+            item->doWriteTransform(item->transform, nullptr, compensate);
+        }
+
+        if (adjust_transf_center) { // The transformation center should not be touched in case of pasting or importing, which is allowed by this if clause
+            // if we're moving the actual object, not just updating the repr, we can transform the
+            // center by the same matrix (only necessary for non-translations)
+            if (set_i2d && item->isCenterSet() && !(affine.isTranslation() || affine.isIdentity())) {
+                item->setCenter(old_center * affine);
+                item->updateRepr();
+            }
+        }
+    }
+}
+
+void ObjectSet::removeTransform()
+{
+    auto items = xmlNodes();
+    for (auto l=items.begin();l!=items.end() ;++l) {
+        (*l)->removeAttribute("transform");
+    }
+
+    if (document()) {
+        DocumentUndo::done(document(), _("Remove transform"), "");
+    }
+}
+
+void ObjectSet::setScaleAbsolute(double x0, double x1,double y0, double y1)
+{
+    if (isEmpty())
+        return;
+
+    Geom::OptRect bbox = visualBounds();
+    if ( !bbox ) {
+        return;
+    }
+
+    Geom::Translate const p2o(-bbox->min());
+
+    Geom::Scale const newSize(x1 - x0,
+                              y1 - y0);
+    Geom::Scale const scale( newSize * Geom::Scale(bbox->dimensions()).inverse() );
+    Geom::Translate const o2n(x0, y0);
+    Geom::Affine const final( p2o * scale * o2n );
+
+    applyAffine(final);
+}
+
+void ObjectSet::setScaleRelative(Geom::Point const &align, Geom::Scale const &scale)
+{
+    if (isEmpty())
+        return;
+
+    Geom::OptRect bbox = visualBounds();
+
+    if ( !bbox ) {
+        return;
+    }
+
+    // FIXME: ARBITRARY LIMIT: don't try to scale above 1 Mpx, it won't display properly and will crash sooner or later anyway
+    if ( bbox->dimensions()[Geom::X] * scale[Geom::X] > 1e6  ||
+         bbox->dimensions()[Geom::Y] * scale[Geom::Y] > 1e6 )
+    {
+        return;
+    }
+
+    Geom::Translate const n2d(-align);
+    Geom::Translate const d2n(align);
+    Geom::Affine const final( n2d * scale * d2n );
+    applyAffine(final);
+}
+
+void ObjectSet::rotateRelative(Geom::Point const &center, double angle_degrees)
+{
+    Geom::Translate const d2n(center);
+    Geom::Translate const n2d(-center);
+    Geom::Rotate const rotate(Geom::Rotate::from_degrees(angle_degrees));
+    Geom::Affine const final( Geom::Affine(n2d) * rotate * d2n );
+    applyAffine(final);
+}
+
+void ObjectSet::skewRelative(Geom::Point const &align, double dx, double dy)
+{
+    Geom::Translate const d2n(align);
+    Geom::Translate const n2d(-align);
+    Geom::Affine const skew(1, dy,
+                            dx, 1,
+                            0, 0);
+    Geom::Affine const final( n2d * skew * d2n );
+    applyAffine(final);
+}
+
+void ObjectSet::moveRelative(Geom::Point const &move, bool compensate)
+{
+    applyAffine(Geom::Affine(Geom::Translate(move)), true, compensate);
+}
+
+void ObjectSet::moveRelative(double dx, double dy)
+{
+    applyAffine(Geom::Affine(Geom::Translate(dx, dy)));
+}
+
+/**
+ * Rotates selected objects 90 degrees, either clock-wise or counter-clockwise, depending on the value of ccw.
+ */
+void ObjectSet::rotate90(bool ccw)
+{
+    if (isEmpty())
+        return;
+
+    auto items_copy = items();
+    double y_dir = document() ? document()->yaxisdir() : 1;
+    Geom::Rotate const rot_90(Geom::Point(0, ccw ? -y_dir : y_dir)); // pos. or neg. rotation, depending on the value of ccw
+    for (auto l=items_copy.begin();l!=items_copy.end() ;++l) {
+        SPItem *item = *l;
+        if (item) {
+            item->rotate_rel(rot_90);
+        } else {
+            g_assert_not_reached();
+        }
+    }
+
+    if (document()) {
+        DocumentUndo::done(document(),
+                           ccw ? _("Rotate 90\xc2\xb0 CCW") : _("Rotate 90\xc2\xb0 CW"),
+                           ccw ? INKSCAPE_ICON("object-rotate-left") : INKSCAPE_ICON("object-rotate-right"));
+    }
+}
+
+void ObjectSet::rotate(gdouble const angle_degrees)
+{
+    if (isEmpty())
+        return;
+
+    std::optional<Geom::Point> center_ = center();
+    if (!center_) {
+        return;
+    }
+    rotateRelative(*center_, angle_degrees);
+
+    if (document()) {
+        DocumentUndo::maybeDone(document(),
+                                ( ( angle_degrees > 0 )? "selector:rotate:ccw": "selector:rotate:cw" ),
+                                _("Rotate"), INKSCAPE_ICON("tool-pointer"));
+    }
+}
+
+/*
+ * Selects all the visible items with the same fill and/or stroke color/style as the items in the current selection
+ *
+ * Params:
+ * desktop - set the selection on this desktop
+ * fill - select objects matching fill
+ * stroke - select objects matching stroke
+ */
+void sp_select_same_fill_stroke_style(SPDesktop *desktop, gboolean fill, gboolean stroke, gboolean style)
+{
+    if (!desktop) {
+        return;
+    }
+
+    if (!fill && !stroke && !style) {
+        return;
+    }
+
+    Inkscape::Selection *selection = desktop->getSelection();
+
+    Inkscape::Preferences *prefs = Inkscape::Preferences::get();
+    bool inlayersame = prefs->getBool("/options/selection/samelikeall", false);
+    bool onlyvisible = prefs->getBool("/options/kbselection/onlyvisible", true);
+    bool onlysensitive = prefs->getBool("/options/kbselection/onlysensitive", true);
+
+    SPObject *root = desktop->layerManager().currentRoot();
+    bool ingroup = true;
+
+    // Apply the same layer logic to select same as used for select all.
+    if (inlayersame) {
+        PrefsSelectionContext inlayer = (PrefsSelectionContext)prefs->getInt("/options/kbselection/inlayer", PREFS_SELECTION_LAYER);
+        if (PREFS_SELECTION_ALL != inlayer) {
+            root = selection->activeContext();
+            ingroup = (inlayer == PREFS_SELECTION_LAYER_RECURSIVE);
+        }
+    }
+
+    std::vector<SPItem*> x,y;
+    std::vector<SPItem*> all_list = get_all_items(x, root, desktop, onlyvisible, onlysensitive, ingroup, y);
+    std::vector<SPItem*> all_matches;
+
+    auto items = selection->items();
+
+    std::vector<SPItem*> tmp;
+    for (auto iter : all_list) {
+        if(!SP_IS_GROUP(iter)){
+            tmp.push_back(iter);
+        }
+    }
+    all_list=tmp;
+
+    for (auto sel_iter=items.begin();sel_iter!=items.end();++sel_iter) {
+        SPItem *sel = *sel_iter;
+        std::vector<SPItem*> matches = all_list;
+        if (fill && stroke && style) {
+            matches = sp_get_same_style(sel, matches);
+        }
+        else if (fill) {
+            matches = sp_get_same_style(sel, matches, SP_FILL_COLOR);
+        }
+        else if (stroke) {
+            matches = sp_get_same_style(sel, matches, SP_STROKE_COLOR);
+        }
+        else if (style) {
+            matches = sp_get_same_style(sel, matches,SP_STROKE_STYLE_ALL);
+        }
+        all_matches.insert(all_matches.end(), matches.begin(),matches.end());
+    }
+
+    selection->clear();
+    selection->setList(all_matches);
+
+}
+
+
+/*
+ * Selects all the visible items with the same object type as the items in the current selection
+ *
+ * Params:
+ * desktop - set the selection on this desktop
+ */
+void sp_select_same_object_type(SPDesktop *desktop)
+{
+    if (!desktop) {
+        return;
+    }
+
+
+    Inkscape::Preferences *prefs = Inkscape::Preferences::get();
+    bool onlyvisible = prefs->getBool("/options/kbselection/onlyvisible", true);
+    bool onlysensitive = prefs->getBool("/options/kbselection/onlysensitive", true);
+    bool ingroups = TRUE;
+    std::vector<SPItem*> x,y;
+    std::vector<SPItem*> all_list = get_all_items(x, desktop->layerManager().currentRoot(), desktop, onlyvisible, onlysensitive, ingroups, y);
+    std::vector<SPItem*> matches = all_list;
+
+    Inkscape::Selection *selection = desktop->getSelection();
+
+    auto items= selection->items();
+    for (auto sel_iter=items.begin();sel_iter!=items.end();++sel_iter) {
+        SPItem *sel = *sel_iter;
+        if (sel) {
+            matches = sp_get_same_object_type(sel, matches);
+        } else {
+            g_assert_not_reached();
+        }
+    }
+
+    selection->clear();
+    selection->setList(matches);
+
+}
+
+
+
+/*
+ * Find all items in src list that have the same fill or stroke style as sel
+ * Return the list of matching items
+ */
+std::vector<SPItem*> sp_get_same_fill_or_stroke_color(SPItem *sel, std::vector<SPItem*> &src, SPSelectStrokeStyleType type)
+{
+    std::vector<SPItem*> matches ;
+    gboolean match = false;
+
+    SPIPaint *sel_paint = sel->style->getFillOrStroke(type == SP_FILL_COLOR);
+
+    for (std::vector<SPItem*>::const_reverse_iterator i=src.rbegin();i!=src.rend();++i) {
+        SPItem *iter = *i;
+        if (iter) {
+            SPIPaint *iter_paint = iter->style->getFillOrStroke(type == SP_FILL_COLOR);
+            match = false;
+            if (sel_paint->isColor() && iter_paint->isColor() // color == color comparison doesn't seem to work here.
+                && (sel_paint->value.color.toRGBA32(1.0) == iter_paint->value.color.toRGBA32(1.0))) {
+                match = true;
+            } else if (sel_paint->isPaintserver() && iter_paint->isPaintserver()) {
+
+                SPPaintServer *sel_server =
+                    (type == SP_FILL_COLOR) ? sel->style->getFillPaintServer() : sel->style->getStrokePaintServer();
+                SPPaintServer *iter_server =
+                    (type == SP_FILL_COLOR) ? iter->style->getFillPaintServer() : iter->style->getStrokePaintServer();
+
+                SPGradient *sel_gradient, *iter_gradient;
+                SPPattern *sel_pattern, *iter_pattern;
+
+                if ((sel_gradient = dynamic_cast<SPGradient *>(sel_server)) &&
+                    (iter_gradient = dynamic_cast<SPGradient *>(iter_server)) &&
+                    sel_gradient->getVector()->isSwatch() && //
+                    iter_gradient->getVector()->isSwatch()) {
+                    SPGradient *sel_vector = sel_gradient->getVector();
+                    SPGradient *iter_vector = iter_gradient->getVector();
+                    if (sel_vector == iter_vector) {
+                        match = true;
+                    }
+
+                } else if ((sel_pattern = dynamic_cast<SPPattern *>(sel_server)) &&
+                           (iter_pattern = dynamic_cast<SPPattern *>(iter_server))) {
+                    SPPattern *sel_pat = sel_pattern->rootPattern();
+                    SPPattern *iter_pat = iter_pattern->rootPattern();
+                    if (sel_pat == iter_pat) {
+                        match = true;
+                    }
+                }
+            } else if (sel_paint->isNone() && iter_paint->isNone()) {
+                match = true;
+            } else if (sel_paint->isNoneSet() && iter_paint->isNoneSet()) {
+                match = true;
+            }
+
+            if (match) {
+                matches.push_back(iter);
+            }
+        } else {
+            g_assert_not_reached();
+        }
+    }
+
+    return matches;
+}
+
+static bool item_type_match (SPItem *i, SPItem *j)
+{
+    if ( dynamic_cast<SPRect *>(i)) {
+        return ( dynamic_cast<SPRect *>(j) );
+
+    } else if (dynamic_cast<SPGenericEllipse *>(i)) {
+        return (dynamic_cast<SPGenericEllipse *>(j));
+
+    } else if (dynamic_cast<SPStar *>(i) || dynamic_cast<SPPolygon *>(i)) {
+        return (dynamic_cast<SPStar *>(j) || dynamic_cast<SPPolygon *>(j)) ;
+
+    } else if (dynamic_cast<SPSpiral *>(i)) {
+        return (dynamic_cast<SPSpiral *>(j));
+
+    } else if (dynamic_cast<SPPath *>(i) || dynamic_cast<SPLine *>(i) || dynamic_cast<SPPolyLine *>(i)) {
+        return (dynamic_cast<SPPath *>(j) || dynamic_cast<SPLine *>(j) || dynamic_cast<SPPolyLine *>(j));
+
+    } else if (dynamic_cast<SPText *>(i) || dynamic_cast<SPFlowtext *>(i) || dynamic_cast<SPTSpan *>(i) || dynamic_cast<SPTRef *>(i) || dynamic_cast<SPString *>(i)) {
+        return (dynamic_cast<SPText *>(j) || dynamic_cast<SPFlowtext *>(j) || dynamic_cast<SPTSpan *>(j) || dynamic_cast<SPTRef *>(j) || dynamic_cast<SPString *>(j));
+
+    }  else if (dynamic_cast<SPUse *>(i)) {
+        return (dynamic_cast<SPUse *>(j)) ;
+
+    } else if (dynamic_cast<SPImage *>(i)) {
+        return (dynamic_cast<SPImage *>(j));
+
+    } else if (dynamic_cast<SPOffset *>(i) && dynamic_cast<SPOffset *>(i)->sourceHref) {   // Linked offset
+        return (dynamic_cast<SPOffset *>(j) && dynamic_cast<SPOffset *>(j)->sourceHref);
+
+    }  else if (dynamic_cast<SPOffset *>(i) && !dynamic_cast<SPOffset *>(i)->sourceHref) { // Dynamic offset
+        return (dynamic_cast<SPOffset *>(j) && !dynamic_cast<SPOffset *>(j)->sourceHref);
+
+    }
+
+    return false;
+}
+
+/*
+ * Find all items in src list that have the same object type as sel by type
+ * Return the list of matching items
+ */
+std::vector<SPItem*> sp_get_same_object_type(SPItem *sel, std::vector<SPItem*> &src)
+{
+    std::vector<SPItem*> matches;
+
+    for (std::vector<SPItem*>::const_reverse_iterator i=src.rbegin();i!=src.rend();++i) {
+        SPItem *item = *i;
+        if (item && item_type_match(sel, item) && !item->cloned) {
+            matches.push_back(item);
+        }
+    }
+    return matches;
+}
+
+/*
+ * Find all items in src list that have the same stroke style as sel by type
+ * Return the list of matching items
+ */
+std::vector<SPItem*> sp_get_same_style(SPItem *sel, std::vector<SPItem*> &src, SPSelectStrokeStyleType type)
+{
+    std::vector<SPItem*> matches;
+    bool match = false;
+
+    SPStyle *sel_style = sel->style;
+
+    if (type == SP_FILL_COLOR || type == SP_STYLE_ALL) {
+        src = sp_get_same_fill_or_stroke_color(sel, src, SP_FILL_COLOR);
+    }
+    if (type == SP_STROKE_COLOR || type == SP_STYLE_ALL) {
+        src = sp_get_same_fill_or_stroke_color(sel, src, SP_STROKE_COLOR);
+    }
+
+    /*
+     * Stroke width needs to handle transformations, so call this function
+     * to get the transformed stroke width
+     */
+    std::vector<SPItem*> objects;
+    SPStyle *sel_style_for_width = nullptr;
+    if (type == SP_STROKE_STYLE_WIDTH || type == SP_STROKE_STYLE_ALL || type==SP_STYLE_ALL ) {
+        objects.push_back(sel);
+        sel_style_for_width = new SPStyle(SP_ACTIVE_DOCUMENT);
+        objects_query_strokewidth (objects, sel_style_for_width);
+    }
+    bool match_g;
+    for (auto iter : src) {
+        if (iter) {
+            match_g=true;
+            SPStyle *iter_style = iter->style;
+            match = true;
+
+            if (type == SP_STROKE_STYLE_WIDTH|| type == SP_STROKE_STYLE_ALL|| type==SP_STYLE_ALL) {
+                match = (sel_style->stroke_width.set == iter_style->stroke_width.set);
+                if (sel_style->stroke_width.set && iter_style->stroke_width.set) {
+                    std::vector<SPItem*> objects;
+                    objects.insert(objects.begin(),iter);
+                    SPStyle tmp_style(SP_ACTIVE_DOCUMENT);
+                    objects_query_strokewidth (objects, &tmp_style);
+
+                    if (sel_style_for_width) {
+                        match = (sel_style_for_width->stroke_width.computed == tmp_style.stroke_width.computed);
+                    }
+                }
+            }
+            match_g = match_g && match;
+            if (type == SP_STROKE_STYLE_DASHES|| type == SP_STROKE_STYLE_ALL || type==SP_STYLE_ALL) {
+                match = (sel_style->stroke_dasharray.set == iter_style->stroke_dasharray.set);
+                if (sel_style->stroke_dasharray.set && iter_style->stroke_dasharray.set) {
+                    match = (sel_style->stroke_dasharray == iter_style->stroke_dasharray);
+                }
+            }
+            match_g = match_g && match;
+            if (type == SP_STROKE_STYLE_MARKERS|| type == SP_STROKE_STYLE_ALL|| type==SP_STYLE_ALL) {
+                match = true;
+                int len = sizeof(sel_style->marker)/sizeof(SPIString);
+                for (int i = 0; i < len; i++) {
+                    if (g_strcmp0(sel_style->marker_ptrs[i]->value(),
+                                  iter_style->marker_ptrs[i]->value())) {
+                        match = false;
+                        break;
+                    }
+                }
+            }
+            match_g = match_g && match;
+            if (match_g) {
+                while (iter->cloned) iter=dynamic_cast<SPItem *>(iter->parent);
+                matches.insert(matches.begin(),iter);
+            }
+        } else {
+            g_assert_not_reached();
+        }
+    }
+
+    if( sel_style_for_width != nullptr ) delete sel_style_for_width;
+    return matches;
+}
+
+// helper function:
+static
+Geom::Point
+cornerFarthestFrom(Geom::Rect const &r, Geom::Point const &p){
+    Geom::Point m = r.midpoint();
+    unsigned i = 0;
+    if (p[X] < m[X]) {
+        i = 1;
+    }
+    if (p[Y] < m[Y]) {
+        i = 3 - i;
+    }
+    return r.corner(i);
+}
+
+/**
+\param  angle   the angle in "angular pixels", i.e. how many visible pixels must move the outermost point of the rotated object
+*/
+void ObjectSet::rotateScreen(double angle)
+{
+    if (isEmpty()||!desktop())
+        return;
+
+    Geom::OptRect bbox = visualBounds();
+    std::optional<Geom::Point> center_ = center();
+
+    if ( !bbox || !center_ ) {
+        return;
+    }
+
+    gdouble const zoom = desktop()->current_zoom();
+    gdouble const zmove = angle / zoom;
+    gdouble const r = Geom::L2(cornerFarthestFrom(*bbox, *center_) - *center_);
+
+    gdouble const zangle = 180 * atan2(zmove, r) / M_PI;
+
+    rotateRelative(*center_, zangle);
+
+    DocumentUndo::maybeDone(document(),
+                            ( (angle > 0) ? "selector:rotate:ccw": "selector:rotate:cw" ),
+                            _("Rotate by pixels"), INKSCAPE_ICON("tool-pointer"));
+}
+
+void ObjectSet::scaleGrow(double grow)
+{
+    if (isEmpty())
+        return;
+
+    Geom::OptRect bbox = visualBounds();
+    if (!bbox) {
+        return;
+    }
+
+    Geom::Point const center_(bbox->midpoint());
+
+    // you can't scale "do nizhe pola" (below zero)
+    double const max_len = bbox->maxExtent();
+    if ( max_len + grow <= 1e-3 ) {
+        return;
+    }
+
+    double const times = 1.0 + grow / max_len;
+    setScaleRelative(center_, Geom::Scale(times, times));
+
+    if (document()) {
+            DocumentUndo::maybeDone(document(),
+                                    ((grow > 0) ? "selector:grow:larger" : "selector:grow:smaller" ),
+                                    ((grow > 0) ? _("Grow") : _("Shrink")), INKSCAPE_ICON("tool-pointer"));
+    }
+}
+
+void ObjectSet::scaleScreen(double grow_pixels)
+{
+    if(!desktop())
+        return;
+    scaleGrow(grow_pixels / desktop()->current_zoom());
+}
+
+void ObjectSet::scale(double times)
+{
+    if (isEmpty())
+        return;
+
+    Geom::OptRect sel_bbox = visualBounds();
+
+    if (!sel_bbox) {
+        return;
+    }
+
+    Geom::Point const center_(sel_bbox->midpoint());
+    setScaleRelative(center_, Geom::Scale(times, times));
+    DocumentUndo::done(document(), _("Scale by whole factor"), INKSCAPE_ICON("tool-pointer"));
+}
+
+void ObjectSet::move(double dx, double dy)
+{
+    if (isEmpty()) {
+        return;
+    }
+
+    moveRelative(dx, dy);
+
+    if (document()) {
+        if (dx == 0) {
+            DocumentUndo::maybeDone(document(), "selector:move:vertical", _("Move vertically"), INKSCAPE_ICON("tool-pointer"));
+        } else if (dy == 0) {
+            DocumentUndo::maybeDone(document(), "selector:move:horizontal", _("Move horizontally"), INKSCAPE_ICON("tool-pointer"));
+        } else {
+            DocumentUndo::done(document(), _("Move"), INKSCAPE_ICON("tool-pointer"));
+        }
+    }
+}
+
+void ObjectSet::moveScreen(double dx, double dy)
+{
+    if (isEmpty() || !desktop()) {
+        return;
+    }
+
+    // same as sp_selection_move but divide deltas by zoom factor
+    gdouble const zoom = desktop()->current_zoom();
+    gdouble const zdx = dx / zoom;
+    gdouble const zdy = dy / zoom;
+    moveRelative(zdx, zdy);
+
+    SPDocument *doc = document();
+    if (dx == 0) {
+        DocumentUndo::maybeDone(doc, "selector:move:vertical", _("Move vertically by pixels"), INKSCAPE_ICON("tool-pointer"));
+    } else if (dy == 0) {
+        DocumentUndo::maybeDone(doc, "selector:move:horizontal", _("Move horizontally by pixels"), INKSCAPE_ICON("tool-pointer"));
+    } else {
+        DocumentUndo::done(doc, _("Move"), INKSCAPE_ICON("tool-pointer"));
+    }
+}
+
+
+
+struct Forward {
+    typedef SPObject *Iterator;
+
+    static Iterator children(SPObject *o) { return o->firstChild(); }
+    static Iterator siblings_after(SPObject *o) { return o->getNext(); }
+    static void dispose(Iterator i) {}
+
+    static SPObject *object(Iterator i) { return i; }
+    static Iterator next(Iterator i) { return i->getNext(); }
+    static bool isNull(Iterator i) {return (!i);}
+};
+
+struct ListReverse {
+    typedef std::list<SPObject *> *Iterator;
+
+    static Iterator children(SPObject *o) {
+        return make_list(o, nullptr);
+    }
+    static Iterator siblings_after(SPObject *o) {
+        return make_list(o->parent, o);
+    }
+    static void dispose(Iterator i) {
+        delete i;
+    }
+
+    static SPObject *object(Iterator i) {
+        return *(i->begin());
+    }
+    static Iterator next(Iterator i) { i->pop_front(); return i; }
+
+    static bool isNull(Iterator i) {return i->empty();}
+
+private:
+    static std::list<SPObject *> *make_list(SPObject *object, SPObject *limit) {
+        auto list = new std::list<SPObject *>;
+        for (auto &child: object->children) {
+            if (&child == limit) {
+                break;
+            }
+            list->push_front(&child);
+        }
+        return list;
+    }
+};
+
+
+
+template <typename D>
+SPItem *next_item(SPDesktop *desktop, std::vector<SPObject *> &path, SPObject *root,
+                  bool only_in_viewport, PrefsSelectionContext inlayer, bool onlyvisible, bool onlysensitive)
+{
+    typename D::Iterator children;
+    typename D::Iterator iter;
+
+    SPItem *found=nullptr;
+
+    if (!path.empty()) {
+        SPObject *object=path.back();
+        path.pop_back();
+        g_assert(object->parent == root);
+        if (desktop->layerManager().isLayer(object)) {
+            found = next_item<D>(desktop, path, object, only_in_viewport, inlayer, onlyvisible, onlysensitive);
+        }
+        iter = children = D::siblings_after(object);
+    } else {
+        iter = children = D::children(root);
+    }
+
+    while ( !D::isNull(iter) && !found ) {
+        SPObject *object=D::object(iter);
+        if (desktop->layerManager().isLayer(object)) {
+            if (PREFS_SELECTION_LAYER != inlayer) { // recurse into sublayers
+                std::vector<SPObject *> empt;
+                found = next_item<D>(desktop, empt, object, only_in_viewport, inlayer, onlyvisible, onlysensitive);
+            }
+        } else {
+            SPItem *item = dynamic_cast<SPItem *>(object);
+            if ( item &&
+                 ( !only_in_viewport || desktop->isWithinViewport(item) ) &&
+                 ( !onlyvisible || !desktop->itemIsHidden(item)) &&
+                 ( !onlysensitive || !item->isLocked()) &&
+                 !desktop->layerManager().isLayer(item) )
+            {
+                found = item;
+            }
+        }
+        iter = D::next(iter);
+    }
+
+    D::dispose(children);
+
+    return found;
+}
+
+
+template <typename D>
+SPItem *next_item_from_list(SPDesktop *desktop, std::vector<SPItem*> const &items,
+                            SPObject *root, bool only_in_viewport, PrefsSelectionContext inlayer, bool onlyvisible, bool onlysensitive)
+{
+    SPObject *current=root;
+    for(auto item : items) {
+        if ( root->isAncestorOf(item) &&
+             ( !only_in_viewport || desktop->isWithinViewport(item) ) )
+        {
+            current = item;
+            break;
+        }
+    }
+
+    std::vector<SPObject *> path;
+    while ( current != root ) {
+        path.push_back(current);
+        current = current->parent;
+    }
+
+    SPItem *next;
+    // first, try from the current object
+    next = next_item<D>(desktop, path, root, only_in_viewport, inlayer, onlyvisible, onlysensitive);
+
+    if (!next) { // if we ran out of objects, start over at the root
+        std::vector<SPObject *> empt;
+        next = next_item<D>(desktop, empt, root, only_in_viewport, inlayer, onlyvisible, onlysensitive);
+    }
+
+    return next;
+}
+
+void
+sp_selection_item_next(SPDesktop *desktop)
+{
+    g_return_if_fail(desktop != nullptr);
+    Inkscape::Selection *selection = desktop->getSelection();
+
+    Inkscape::Preferences *prefs = Inkscape::Preferences::get();
+    PrefsSelectionContext inlayer = (PrefsSelectionContext)prefs->getInt("/options/kbselection/inlayer", PREFS_SELECTION_LAYER);
+    bool onlyvisible = prefs->getBool("/options/kbselection/onlyvisible", true);
+    bool onlysensitive = prefs->getBool("/options/kbselection/onlysensitive", true);
+
+    SPObject *root;
+    if (PREFS_SELECTION_ALL != inlayer) {
+        root = selection->activeContext();
+    } else {
+        root = desktop->layerManager().currentRoot();
+    }
+
+    std::vector<SPItem *> vec(selection->items().begin(), selection->items().end());
+    SPItem *item=next_item_from_list<Forward>(desktop, vec, root, SP_CYCLING == SP_CYCLE_VISIBLE, inlayer, onlyvisible, onlysensitive);
+
+    if (item) {
+        selection->set(item, PREFS_SELECTION_LAYER_RECURSIVE == inlayer);
+        if ( SP_CYCLING == SP_CYCLE_FOCUS ) {
+            scroll_to_show_item(desktop, item);
+        }
+    }
+}
+
+void
+sp_selection_item_prev(SPDesktop *desktop)
+{
+    SPDocument *document = desktop->getDocument();
+    g_return_if_fail(document != nullptr);
+    g_return_if_fail(desktop != nullptr);
+    Inkscape::Selection *selection = desktop->getSelection();
+
+    Inkscape::Preferences *prefs = Inkscape::Preferences::get();
+    PrefsSelectionContext inlayer = (PrefsSelectionContext) prefs->getInt("/options/kbselection/inlayer", PREFS_SELECTION_LAYER);
+    bool onlyvisible = prefs->getBool("/options/kbselection/onlyvisible", true);
+    bool onlysensitive = prefs->getBool("/options/kbselection/onlysensitive", true);
+
+    SPObject *root;
+    if (PREFS_SELECTION_ALL != inlayer) {
+        root = selection->activeContext();
+    } else {
+        root = desktop->layerManager().currentRoot();
+    }
+
+    std::vector<SPItem *> vec(selection->items().begin(), selection->items().end());
+    SPItem *item=next_item_from_list<ListReverse>(desktop, vec, root, SP_CYCLING == SP_CYCLE_VISIBLE, inlayer, onlyvisible, onlysensitive);
+
+    if (item) {
+        selection->set(item, PREFS_SELECTION_LAYER_RECURSIVE == inlayer);
+        if ( SP_CYCLING == SP_CYCLE_FOCUS ) {
+            scroll_to_show_item(desktop, item);
+        }
+    }
+}
+
+void sp_selection_next_patheffect_param(SPDesktop * dt)
+{
+    if (!dt) return;
+
+    Inkscape::Selection *selection = dt->getSelection();
+    if ( selection && !selection->isEmpty() ) {
+        SPItem *item = selection->singleItem();
+        if ( SPLPEItem *lpeitem = dynamic_cast<SPLPEItem*>(item) ) {
+            if (lpeitem->hasPathEffect()) {
+                lpeitem->editNextParamOncanvas(dt);
+            } else {
+                dt->messageStack()->flash(Inkscape::WARNING_MESSAGE, _("The selection has no applied path effect."));
+            }
+        }
+    }
+}
+
+/*bool has_path_recursive(SPObject *obj)
+{
+    if (!obj) return false;
+    if (SP_IS_PATH(obj)) {
+        return true;
+    }
+    if (SP_IS_GROUP(obj) || SP_IS_OBJECTGROUP(obj)) {
+        for (SPObject *c = obj->children; c; c = c->next) {
+            if (has_path_recursive(c)) return true;
+        }
+    }
+    return false;
+}*/
+
+void ObjectSet::editMask(bool /*clip*/)
+{
+    return;
+}
+
+
+
+
+/**
+ * If \a item is not entirely visible then adjust visible area to centre on the centre on of
+ * \a item.
+ */
+void scroll_to_show_item(SPDesktop *desktop, SPItem *item)
+{
+    auto dbox = desktop->get_display_area();
+    Geom::OptRect sbox = item->desktopVisualBounds();
+
+    if ( sbox && dbox.contains(*sbox) == false ) {
+        Geom::Point const s_dt = sbox->midpoint();
+        Geom::Point const s_w = desktop->d2w(s_dt);
+        Geom::Point const d_dt = dbox.midpoint();
+        Geom::Point const d_w = desktop->d2w(d_dt);
+        Geom::Point const moved_w( d_w - s_w );
+        desktop->scroll_relative(moved_w);
+    }
+}
+
+void ObjectSet::clone()
+{
+    if (document() == nullptr) {
+        return;
+    }
+
+    Inkscape::XML::Document *xml_doc = document()->getReprDoc();
+
+    // check if something is selected
+    if (isEmpty()) {
+        if(desktop())
+            desktop()->messageStack()->flash(Inkscape::WARNING_MESSAGE, _("Select an <b>object</b> to clone."));
+        return;
+    }
+
+    // Assign IDs to selected objects that don't have an ID attribute
+    enforceIds();
+
+    std::vector<Inkscape::XML::Node*> reprs(xmlNodes().begin(), xmlNodes().end());
+
+    clear();
+
+    // sorting items from different parents sorts each parent's subset without possibly mixing them, just what we need
+    sort(reprs.begin(),reprs.end(),sp_repr_compare_position_bool);
+
+    std::vector<Inkscape::XML::Node*> newsel;
+
+    for(auto sel_repr : reprs){
+        Inkscape::XML::Node *parent = sel_repr->parent();
+
+        Inkscape::XML::Node *clone = xml_doc->createElement("svg:use");
+        clone->setAttribute("x", "0");
+        clone->setAttribute("y", "0");
+        gchar *href_str = g_strdup_printf("#%s", sel_repr->attribute("id"));
+        clone->setAttribute("xlink:href", href_str);
+        g_free(href_str);
+
+        clone->setAttribute("inkscape:transform-center-x", sel_repr->attribute("inkscape:transform-center-x"));
+        clone->setAttribute("inkscape:transform-center-y", sel_repr->attribute("inkscape:transform-center-y"));
+
+        // add the new clone to the top of the original's parent
+        parent->appendChild(clone);
+
+        newsel.push_back(clone);
+        Inkscape::GC::release(clone);
+    }
+
+    DocumentUndo::done(document(), C_("Action", "Clone"), INKSCAPE_ICON("edit-clone"));
+
+    setReprList(newsel);
+}
+
+void ObjectSet::relink()
+{
+    if (isEmpty()) {
+        if(desktop())
+            desktop()->messageStack()->flash(Inkscape::WARNING_MESSAGE, _("Select <b>clones</b> to relink."));
+        return;
+    }
+
+    Inkscape::UI::ClipboardManager *cm = Inkscape::UI::ClipboardManager::get();
+    auto newid = cm->getFirstObjectID();
+    if (newid.empty()) {
+        if(desktop())
+            desktop()->messageStack()->flash(Inkscape::WARNING_MESSAGE, _("Copy an <b>object</b> to clipboard to relink clones to."));
+        return;
+    }
+    auto newref = "#" + newid;
+
+    // Get a copy of current selection.
+    bool relinked = false;
+    auto items_= items();
+    for (auto i=items_.begin();i!=items_.end();++i){
+        SPItem *item = *i;
+
+        if (dynamic_cast<SPUse *>(item)) {
+            item->setAttribute("xlink:href", newref);
+            item->requestDisplayUpdate(SP_OBJECT_MODIFIED_FLAG);
+            relinked = true;
+        }
+    }
+
+    if (!relinked) {
+        if(desktop())
+            desktop()->messageStack()->flash(Inkscape::ERROR_MESSAGE, _("<b>No clones to relink</b> in the selection."));
+    } else {
+        DocumentUndo::done(document(), _("Relink clone"), INKSCAPE_ICON("edit-clone-unlink"));
+    }
+}
+
+
+bool ObjectSet::unlink(const bool skip_undo)
+{
+    if (isEmpty()) {
+        if(desktop())
+            desktop()->messageStack()->flash(Inkscape::WARNING_MESSAGE, _("Select <b>clones</b> to unlink."));
+        return false;
+    }
+
+    // Get a copy of current selection.
+    std::vector<SPItem*> new_select;
+    bool unlinked = false;
+    std::vector<SPItem *> items_(items().begin(), items().end());
+
+    for (auto i=items_.rbegin();i!=items_.rend();++i){
+        SPItem *item = *i;
+
+        ObjectSet tmp_set(document());
+        tmp_set.set(item);
+        auto *clip_obj = item->getClipObject();
+        auto *mask_obj = item->getMaskObject();
+        if (clip_obj) {
+            SPUse *clipuse = dynamic_cast<SPUse *>(clip_obj);
+            if (clipuse) {
+                tmp_set.unsetMask(true,true);
+                unlinked = tmp_set.unlink(true) || unlinked;
+                tmp_set.setMask(true,false,true);
+            }
+            new_select.push_back(tmp_set.singleItem());
+        } else if (mask_obj) {
+            SPUse *maskuse = dynamic_cast<SPUse *>(mask_obj);
+            if (maskuse) {
+                tmp_set.unsetMask(false,true);
+                unlinked = tmp_set.unlink(true) || unlinked;
+                tmp_set.setMask(false,false,true);
+            }
+            new_select.push_back(tmp_set.singleItem());
+        } else {
+            if (dynamic_cast<SPText *>(item)) {
+                SPObject *tspan = sp_tref_convert_to_tspan(item);
+
+                if (tspan) {
+                    item->requestDisplayUpdate(SP_OBJECT_MODIFIED_FLAG);
+                }
+
+                // Set unlink to true, and fall into the next if which
+                // will include this text item in the new selection
+                unlinked = true;
+            }
+
+            if (!(dynamic_cast<SPUse *>(item) || dynamic_cast<SPTRef *>(item))) {
+                // keep the non-use item in the new selection
+                new_select.push_back(item);
+                continue;
+            }
+
+            SPItem *unlink = nullptr;
+            SPUse *use = dynamic_cast<SPUse *>(item);
+            if (use) {
+                unlink = use->unlink();
+                // Unable to unlink use (external or invalid href?)
+                if (!unlink) {
+                    new_select.push_back(item);
+                    continue;
+                }
+            } else /*if (SP_IS_TREF(use))*/ {
+                unlink = dynamic_cast<SPItem *>(sp_tref_convert_to_tspan(item));
+                g_assert(unlink != nullptr);
+            }
+
+            unlinked = true;
+            // Add ungrouped items to the new selection.
+            new_select.push_back(unlink);
+        }
+    }
+
+    if (!new_select.empty()) { // set new selection
+        clear();
+        setList(new_select);
+    }
+    if (!unlinked) {
+        if(desktop())
+            desktop()->messageStack()->flash(Inkscape::ERROR_MESSAGE, _("<b>No clones to unlink</b> in the selection."));
+    }
+
+    if (!skip_undo) {
+        DocumentUndo::done(document(), _("Unlink clone"), INKSCAPE_ICON("edit-clone-unlink"));
+    }
+    return unlinked;
+}
+
+bool ObjectSet::unlinkRecursive(const bool skip_undo, const bool force) {
+    if (isEmpty()){
+        if (desktop())
+            desktop()->messageStack()->flash(Inkscape::WARNING_MESSAGE, _("Select <b>clones</b> to unlink."));
+        return false;
+    }
+    Inkscape::Preferences *prefs = Inkscape::Preferences::get();
+    bool pathoperationsunlink = prefs->getBool("/options/pathoperationsunlink/value", true);
+    if (!force && !pathoperationsunlink) {
+        if (desktop() && !pathoperationsunlink) {
+            desktop()->messageStack()->flash(Inkscape::WARNING_MESSAGE, _("Unable to unlink. Check the setting for 'Unlinking Clones' in your preferences."));
+        }
+        return false;
+    }
+    bool unlinked = false;
+    ObjectSet tmp_set(document());
+    std::vector<SPItem*> items_(items().begin(), items().end());
+    for (auto& it:items_) {
+        tmp_set.set(it);
+        unlinked = tmp_set.unlink(true) || unlinked;
+        it = tmp_set.singleItem();
+        if (SP_IS_GROUP(it)) {
+            std::vector<SPObject*> c = it->childList(false);
+            tmp_set.setList(c);
+            unlinked = tmp_set.unlinkRecursive(skip_undo, force) || unlinked;
+        }
+    }
+    if (!unlinked) {
+        if(desktop())
+            desktop()->messageStack()->flash(Inkscape::ERROR_MESSAGE, _("<b>No clones to unlink</b> in the selection."));
+    }
+    if (!skip_undo) {
+        DocumentUndo::done(document(), _("Unlink clone recursively"), INKSCAPE_ICON("edit-clone-unlink"));
+    }
+    setList(items_);
+    return unlinked;
+}
+
+void ObjectSet::removeLPESRecursive(bool keep_paths) {
+    if (isEmpty()){
+        return;
+    }
+
+    ObjectSet tmp_set(document());
+    std::vector<SPItem *> items_(items().begin(), items().end());
+    std::vector<SPItem *> itemsdone_;
+    for (auto& it:items_) {
+        SPLPEItem *splpeitem = dynamic_cast<SPLPEItem *>(it);
+        SPGroup *spgroup = dynamic_cast<SPGroup *>(it);
+        if (spgroup) {
+            std::vector<SPObject*> c = spgroup->childList(false);
+            tmp_set.setList(c);
+            tmp_set.removeLPESRecursive(keep_paths);
+        }
+        if (splpeitem) {
+            // Maybe the item is changed from SPShape to SPPath invalidating selection
+            // fix issue Inkscape#2321
+            char const *id = splpeitem->getAttribute("id");
+            SPDocument *document = splpeitem->document;
+            splpeitem->removeAllPathEffects(keep_paths);
+            SPItem *upditem = dynamic_cast<SPItem *>(document->getObjectById(id));
+            if (upditem) {
+                itemsdone_.push_back(upditem);
+            }
+        } else {
+            itemsdone_.push_back(it);
+        }
+        
+    }
+    setList(itemsdone_);
+}
+
+void ObjectSet::cloneOriginal()
+{
+    SPItem *item = singleItem();
+
+    gchar const *error = _("Select a <b>clone</b> to go to its original. Select a <b>linked offset</b> to go to its source. Select a <b>text on path</b> to go to the path. Select a <b>flowed text</b> to go to its frame.");
+
+    // Check if other than two objects are selected
+
+    auto items_= items();
+    if (boost::distance(items_) != 1 || !item) {
+        if(desktop())
+            desktop()->messageStack()->flash(Inkscape::WARNING_MESSAGE, error);
+        return;
+    }
+
+    SPItem *original = nullptr;
+    SPUse *use = dynamic_cast<SPUse *>(item);
+    if (use) {
+        original = use->get_original();
+    } else {
+        SPOffset *offset = dynamic_cast<SPOffset *>(item);
+        if (offset && offset->sourceHref) {
+            original = sp_offset_get_source(offset);
+        } else {
+            SPText *text = dynamic_cast<SPText *>(item);
+            SPTextPath *textpath = (text) ? dynamic_cast<SPTextPath *>(text->firstChild()) : nullptr;
+            if (text && textpath) {
+                original = sp_textpath_get_path_item(textpath);
+            } else {
+                SPFlowtext *flowtext = dynamic_cast<SPFlowtext *>(item);
+                if (flowtext) {
+                    original = flowtext->get_frame(nullptr); // first frame only
+                }
+            }
+        }
+    }
+
+    if (original == nullptr) { // it's an object that we don't know what to do with
+        if(desktop())
+            desktop()->messageStack()->flash(Inkscape::WARNING_MESSAGE, error);
+        return;
+    }
+
+    if (!original) {
+        if(desktop())
+            desktop()->messageStack()->flash(Inkscape::ERROR_MESSAGE, _("<b>Cannot find</b> the object to select (orphaned clone, offset, textpath, flowed text?)"));
+        return;
+    }
+
+    for (SPObject *o = original; o && !dynamic_cast<SPRoot *>(o); o = o->parent) {
+        if (dynamic_cast<SPDefs *>(o)) {
+            if(desktop())
+                desktop()->messageStack()->flash(Inkscape::ERROR_MESSAGE, _("The object you're trying to select is <b>not visible</b> (it is in &lt;defs&gt;)"));
+            return;
+        }
+    }
+
+    if (original) {
+        Inkscape::Preferences *prefs = Inkscape::Preferences::get();
+        bool highlight = prefs->getBool("/options/highlightoriginal/value");
+        if (highlight) {
+            Geom::OptRect a = item->desktopVisualBounds();
+            Geom::OptRect b = original->desktopVisualBounds();
+            if ( a && b && desktop()) {
+                // draw a flashing line between the objects
+                auto curve = std::make_unique<SPCurve>();
+                curve->moveto(a->midpoint());
+                curve->lineto(b->midpoint());
+
+                // We use a bpath as it supports dashes.
+                auto canvas_item_bpath = new Inkscape::CanvasItemBpath(desktop()->getCanvasTemp(), curve.get());
+                canvas_item_bpath->set_stroke(0x0000ddff);
+                static std::vector<double> dashes = { 5, 3 };
+                canvas_item_bpath->set_dashes(dashes);
+                canvas_item_bpath->show();
+                desktop()->add_temporary_canvasitem(canvas_item_bpath, 1000);
+            }
+        }
+
+        clear();
+        set(original);
+        if (SP_CYCLING == SP_CYCLE_FOCUS && desktop()) {
+            scroll_to_show_item(desktop(), original);
+        }
+    }
+}
+
+/**
+* This applies the Fill Between Many LPE, and has it refer to the selection.
+*/
+void ObjectSet::cloneOriginalPathLPE(bool allow_transforms)
+{
+
+    Inkscape::SVGOStringStream os;
+    SPObject * firstItem = nullptr;
+    auto items_= items();
+    bool multiple = false;
+    for (auto *item : items_) {
+        if (SP_IS_SHAPE(item) || SP_IS_TEXT(item) || SP_IS_GROUP(item)) {
+            if (firstItem) {
+                os << "|";
+                multiple = true;
+            } else {
+                firstItem = item;
+            }
+            os << '#' << item->getId() << ",0,1";
+        }
+    }
+    if (firstItem) {
+        Inkscape::XML::Document *xml_doc = document()->getReprDoc();
+        SPObject *parent = firstItem->parent;
+        // create the LPE
+        Inkscape::XML::Node *lpe_repr = xml_doc->createElement("inkscape:path-effect");
+        if (multiple) {
+            lpe_repr->setAttribute("effect", "fill_between_many");
+            lpe_repr->setAttributeOrRemoveIfEmpty("linkedpaths", os.str());
+        } else {
+            lpe_repr->setAttribute("effect", "clone_original");
+            lpe_repr->setAttribute("linkeditem", ((Glib::ustring)"#" + (Glib::ustring)firstItem->getId()));
+        }
+        gchar const *method_str = allow_transforms ?  "d" : "bsplinespiro";
+        lpe_repr->setAttribute("method", method_str);
+        gchar const *allow_transforms_str = allow_transforms ? "true" : "false";
+        lpe_repr->setAttribute("allow_transforms", allow_transforms_str);
+        document()->getDefs()->getRepr()->addChild(lpe_repr, nullptr); // adds to <defs> and assigns the 'id' attribute
+        std::string lpe_id_href = std::string("#") + lpe_repr->attribute("id");
+        Inkscape::GC::release(lpe_repr);
+        Inkscape::XML::Node* clone = nullptr;
+        SPGroup *firstgroup = dynamic_cast<SPGroup *>(firstItem);
+        if (firstgroup) {
+            if (!multiple) {
+                clone = firstgroup->getRepr()->duplicate(xml_doc);
+            }
+        } else {
+            // create the new path
+            clone = xml_doc->createElement("svg:path");
+            clone->setAttribute("d", "M 0 0");
+
+        }
+        if (clone) {
+            // add the new clone to the top of the original's parent
+            parent->appendChildRepr(clone);
+            // select the new object:
+            set(clone);
+            Inkscape::GC::release(clone);
+            SPObject *clone_obj = document()->getObjectById(clone->attribute("id"));
+            SPLPEItem *clone_lpeitem = dynamic_cast<SPLPEItem *>(clone_obj);
+            if (clone_lpeitem) {
+                clone_lpeitem->addPathEffect(lpe_id_href, false);
+            }
+            if (multiple) {
+                DocumentUndo::done(document(), _("Fill between many"), INKSCAPE_ICON("edit-clone-link-lpe"));
+            } else {
+                DocumentUndo::done(document(), _("Clone original"), INKSCAPE_ICON("edit-clone-link-lpe"));
+            }
+        }
+    } else {
+        if(desktop())
+            desktop()->messageStack()->flash(Inkscape::WARNING_MESSAGE, _("Select path(s) to fill."));
+    }
+}
+
+void ObjectSet::toMarker(bool apply)
+{
+    // sp_selection_tile has similar code
+
+    SPDocument *doc = document();
+    Inkscape::XML::Document *xml_doc = doc->getReprDoc();
+
+    // check if something is selected
+    if (isEmpty()) {
+        if (desktop())
+            desktop()->messageStack()->flash(Inkscape::WARNING_MESSAGE,
+                                             _("Select <b>object(s)</b> to convert to marker."));
+        return;
+    }
+
+    doc->ensureUpToDate();
+    Geom::OptRect r = visualBounds();
+    if (!r) {
+        return;
+    }
+
+    std::vector<SPItem*> items_(items().begin(), items().end());
+    sort(items_.begin(), items_.end(), sp_item_repr_compare_position_bool);
+
+    // bottommost object, after sorting
+    SPObject *parent = items_.front()->parent;
+
+    Geom::Affine parent_transform;
+    {
+        SPItem *parentItem = dynamic_cast<SPItem *>(parent);
+        if (parentItem) {
+            parent_transform = parentItem->i2doc_affine();
+        } else {
+            g_assert_not_reached();
+        }
+    }
+
+    // Create a list of duplicates, to be pasted inside marker element.
+    std::vector<Inkscape::XML::Node*> repr_copies;
+    for (auto *item : items_) {
+        auto *dup = item->getRepr()->duplicate(xml_doc);
+        repr_copies.push_back(dup);
+    }
+
+    Geom::Rect bbox(r->min() * doc->dt2doc(), r->max() * doc->dt2doc());
+
+    // calculate the transform to be applied to objects to move them to 0,0
+    // (alternative would be to define viewBox or set overflow:visible)
+    Geom::Affine const move = Geom::Translate(-bbox.min());
+    Geom::Point const center = bbox.dimensions() * 0.5;
+
+    if (apply) {
+        // Delete objects so that their clones don't get alerted;
+        // the objects will be restored inside the marker element.
+        for (auto item : items_){
+            item->deleteObject(false);
+        }
+    }
+
+    // Hack: Temporarily set clone compensation to unmoved, so that we can move clone-originals
+    // without disturbing clones.
+    // See ActorAlign::on_button_click() in src/ui/dialog/align-and-distribute.cpp
+    Inkscape::Preferences *prefs = Inkscape::Preferences::get();
+    int saved_compensation = prefs->getInt("/options/clonecompensation/value", SP_CLONE_COMPENSATION_UNMOVED);
+    prefs->setInt("/options/clonecompensation/value", SP_CLONE_COMPENSATION_UNMOVED);
+
+    gchar const *mark_id = generate_marker(repr_copies, bbox, doc, center, parent_transform * move);
+    (void)mark_id;
+
+    // restore compensation setting
+    prefs->setInt("/options/clonecompensation/value", saved_compensation);
+
+
+
+    DocumentUndo::done(doc, _("Objects to marker"), "");
+}
+
+static void sp_selection_to_guides_recursive(SPItem *item, bool wholegroups) {
+    SPGroup *group = dynamic_cast<SPGroup *>(item);
+    if (group && !dynamic_cast<SPBox3D *>(item) && !wholegroups) {
+        std::vector<SPItem*> items=sp_item_group_item_list(group);
+        for (auto item : items){
+            sp_selection_to_guides_recursive(item, wholegroups);
+        }
+    } else {
+        item->convert_to_guides();
+    }
+}
+
+void ObjectSet::toGuides()
+{
+    SPDocument *doc = document();
+    // we need to copy the list because it gets reset when objects are deleted
+    std::vector<SPItem*> items_(items().begin(), items().end());
+
+    if (isEmpty()) {
+        if(desktop())
+            desktop()->messageStack()->flash(Inkscape::WARNING_MESSAGE, _("Select <b>object(s)</b> to convert to guides."));
+        return;
+    }
+
+    Inkscape::Preferences *prefs = Inkscape::Preferences::get();
+    bool deleteitems = !prefs->getBool("/tools/cvg_keep_objects", false);
+    bool wholegroups = prefs->getBool("/tools/cvg_convert_whole_groups", false);
+
+    // If an object is earlier in the selection list than its clone, and it is deleted, then the clone will have changed
+    // and its entry in the selection list is invalid (crash).
+    // Therefore: first convert all, then delete all.
+
+    for (auto item : items_){
+        sp_selection_to_guides_recursive(item, wholegroups);
+    }
+
+    if (deleteitems) {
+        clear();
+        sp_selection_delete_impl(items_);
+    }
+
+    DocumentUndo::done(doc, _("Objects to guides"), "");
+}
+
+/*
+ * Convert objects to <symbol>. How that happens depends on what is selected:
+ *
+ * 1) A random selection of objects will be embedded into a single <symbol> element.
+ *
+ * 2) Except, a single <g> will have its content directly embedded into a <symbol>; the 'id' and
+ *    'style' of the <g> are transferred to the <symbol>.
+ *
+ * 3) Except, a single <g> with a transform that isn't a translation will keep the group when
+ *    embedded into a <symbol> (with 'id' and 'style' transferred to <symbol>). This is because a
+ *    <symbol> cannot have a transform. (If the transform is a pure translation, the translation
+ *    is moved to the referencing <use> element that is created.)
+ *
+ * Possible improvements:
+ *
+ *   Move objects inside symbol so bbox corner at 0,0 (see marker/pattern)
+ *
+ *   For SVG2, set 'refX' 'refY' to object center (with compensating shift in <use>
+ *   transformation).
+ */
+void ObjectSet::toSymbol()
+{
+
+    SPDocument *doc = document();
+    Inkscape::XML::Document *xml_doc = doc->getReprDoc();
+    // Check if something is selected.
+    if (isEmpty()) {
+      if (desktop())
+          desktop()->messageStack()->flash(Inkscape::WARNING_MESSAGE, _("Select <b>objects</b> to convert to symbol."));
+      return;
+    }
+
+    doc->ensureUpToDate();
+
+    std::vector<SPObject*> items_(objects().begin(), objects().end());
+    sort(items_.begin(),items_.end(),sp_object_compare_position_bool);
+
+    // Keep track of parent, this is where <use> will be inserted.
+    Inkscape::XML::Node *the_first_repr = items_[0]->getRepr();
+    Inkscape::XML::Node *the_parent_repr = the_first_repr->parent();
+
+    // Find out if we have a single group
+    bool single_group = false;
+    SPGroup *the_group = nullptr;
+    Geom::Affine transform;
+    if( items_.size() == 1 ) {
+        SPObject *object = items_[0];
+        the_group = dynamic_cast<SPGroup *>(object);
+        if ( the_group ) {
+            single_group = true;
+
+            if( !sp_svg_transform_read( object->getAttribute("transform"), &transform ))
+                transform = Geom::identity();
+
+            if( transform.isTranslation() ) {
+
+                // Create new list from group children.
+                items_ = object->childList(false);
+
+                // Hack: Temporarily set clone compensation to unmoved, so that we can move clone-originals
+                // without disturbing clones.
+                // See ActorAlign::on_button_click() in src/ui/dialog/align-and-distribute.cpp
+                Inkscape::Preferences *prefs = Inkscape::Preferences::get();
+                int saved_compensation = prefs->getInt("/options/clonecompensation/value", SP_CLONE_COMPENSATION_UNMOVED);
+                prefs->setInt("/options/clonecompensation/value", SP_CLONE_COMPENSATION_UNMOVED);
+
+                // Remove transform on group, updating clones.
+                the_group->doWriteTransform(Geom::identity());
+
+                // restore compensation setting
+                prefs->setInt("/options/clonecompensation/value", saved_compensation);
+            }
+        }
+    }
+
+    // Create new <symbol>
+    Inkscape::XML::Node *defsrepr = doc->getDefs()->getRepr();
+    Inkscape::XML::Node *symbol_repr = xml_doc->createElement("svg:symbol");
+    Inkscape::XML::Node *title_repr = xml_doc->createElement("svg:title");
+
+    defsrepr->appendChild(symbol_repr);
+    bool settitle = false;
+    // For a single group, copy relevant attributes.
+    if( single_group ) {
+        Glib::ustring id = the_group->getAttribute("id");
+        symbol_repr->setAttribute("style",  the_group->getAttribute("style"));
+
+        gchar * title = the_group->title();
+        if (title) {
+            symbol_repr->addChildAtPos(title_repr, 0);
+            title_repr->appendChild(xml_doc->createTextNode(title));
+            Inkscape::GC::release(title_repr);
+        }
+        g_free(title);
+
+        gchar * desc = the_group->desc();
+        if (desc) {
+            Inkscape::XML::Node *desc_repr = xml_doc->createElement("svg:desc");
+            desc_repr->setContent(desc);
+            desc_repr->appendChild(xml_doc->createTextNode(desc));
+            symbol_repr->addChildAtPos(desc_repr, 1);
+            Inkscape::GC::release(desc_repr);
+        }
+        g_free(desc);
+        symbol_repr->setAttribute("class",  the_group->getAttribute("class"));
+        the_group->setAttribute("id", id + "_transform");
+        symbol_repr->setAttribute("id", id);
+
+        // This should eventually be replaced by 'refX' and 'refY' once SVG WG approves it.
+        // It is done here for round-tripping
+        symbol_repr->setAttribute("inkscape:transform-center-x",
+                                  the_group->getAttribute("inkscape:transform-center-x"));
+        symbol_repr->setAttribute("inkscape:transform-center-y",
+                                  the_group->getAttribute("inkscape:transform-center-y"));
+
+        the_group->removeAttribute("style");
+
+    }
+
+    // Move selected items to new <symbol>
+    for (std::vector<SPObject*>::const_reverse_iterator i=items_.rbegin();i!=items_.rend();++i){
+        gchar* title = (*i)->title();
+        if (!single_group && !settitle && title) {
+            symbol_repr->addChildAtPos(title_repr, 0);
+            title_repr->appendChild(xml_doc->createTextNode(title));
+            Inkscape::GC::release(title_repr);
+            gchar * desc = (*i)->desc();
+            if (desc) {
+                Inkscape::XML::Node *desc_repr = xml_doc->createElement("svg:desc");
+                desc_repr->appendChild(xml_doc->createTextNode(desc));
+                symbol_repr->addChildAtPos(desc_repr, 1);
+                Inkscape::GC::release(desc_repr);
+            }
+            g_free(desc);
+            settitle = true;
+        }
+        g_free(title);
+        Inkscape::XML::Node *repr = (*i)->getRepr();
+        repr->parent()->removeChild(repr);
+        symbol_repr->addChild(repr, nullptr);
+    }
+
+    if( single_group && transform.isTranslation() ) {
+        the_group->deleteObject(true);
+    }
+
+    // Create <use> pointing to new symbol (to replace the moved objects).
+    Inkscape::XML::Node *clone = xml_doc->createElement("svg:use");
+
+    clone->setAttribute("xlink:href", Glib::ustring("#")+symbol_repr->attribute("id"));
+
+    the_parent_repr->appendChild(clone);
+
+    if( single_group && transform.isTranslation() ) {
+        clone->setAttributeOrRemoveIfEmpty("transform", sp_svg_transform_write(transform));
+    }
+
+    // Change selection to new <use> element.
+    set(clone);
+
+    // Clean up
+    Inkscape::GC::release(symbol_repr);
+
+    DocumentUndo::done(doc, _("Group to symbol"), "");
+}
+
+/*
+ * Takes selected <use> that reference a symbol, and unSymbol those symbols
+ */
+void ObjectSet::unSymbol()
+{
+    for (const auto obj: items()) {
+        auto use = dynamic_cast<SPUse*>(obj);
+        if (use) {
+            auto sym = dynamic_cast<SPSymbol*>(use->root());
+            if (sym) {
+                sym->unSymbol();
+            }
+        }
+    }
+    DocumentUndo::done(document(), _("unSymbol all selected symbols"), "");
+}
+
+void ObjectSet::tile(bool apply)
+{
+    // toMarker has similar code
+
+    SPDocument *doc = document();
+    Inkscape::XML::Document *xml_doc = doc->getReprDoc();
+
+    // check if something is selected
+    if (isEmpty()) {
+        if (desktop())
+            desktop()->messageStack()->flash(Inkscape::WARNING_MESSAGE,
+                                             _("Select <b>object(s)</b> to convert to pattern."));
+        return;
+    }
+
+    doc->ensureUpToDate();
+    Geom::OptRect r = visualBounds();
+    if ( !r ) {
+        return;
+    }
+
+    std::vector<SPItem*> items_(items().begin(), items().end());
+
+    sort(items_.begin(),items_.end(),sp_object_compare_position_bool);
+
+    // bottommost object, after sorting
+    SPObject *parent = items_[0]->parent;
+
+
+    Geom::Affine parent_transform;
+    {
+        SPItem *parentItem = dynamic_cast<SPItem *>(parent);
+        if (parentItem) {
+            parent_transform = parentItem->i2doc_affine();
+        } else {
+            g_assert_not_reached();
+        }
+    }
+
+    // remember the position of the first item
+    gint pos = items_[0]->getRepr()->position();
+
+    // create a list of duplicates
+    std::vector<Inkscape::XML::Node*> repr_copies;
+    for (auto item : items_){
+        Inkscape::XML::Node *dup = item->getRepr()->duplicate(xml_doc);
+        repr_copies.push_back(dup);
+    }
+
+    Geom::Rect bbox(r->min() * doc->dt2doc(), r->max() * doc->dt2doc());
+
+    if (apply) {
+        // delete objects so that their clones don't get alerted; this object will be restored shortly
+        for (auto item : items_){
+            item->deleteObject(false);
+        }
+    }
+
+    // Hack: Temporarily set clone compensation to unmoved, so that we can move clone-originals
+    // without disturbing clones.
+    // See ActorAlign::on_button_click() in src/ui/dialog/align-and-distribute.cpp
+    Inkscape::Preferences *prefs = Inkscape::Preferences::get();
+    int saved_compensation = prefs->getInt("/options/clonecompensation/value", SP_CLONE_COMPENSATION_UNMOVED);
+    prefs->setInt("/options/clonecompensation/value", SP_CLONE_COMPENSATION_UNMOVED);
+
+    Geom::Affine move = Geom::Translate(- bbox.min());
+    gchar const *pat_id = SPPattern::produce(repr_copies, bbox, doc,
+                                       move.inverse() /* patternTransform */,
+                                       parent_transform * move);
+
+    // restore compensation setting
+    prefs->setInt("/options/clonecompensation/value", saved_compensation);
+
+    if (apply) {
+        Inkscape::XML::Node *rect = xml_doc->createElement("svg:rect");
+        gchar *style_str = g_strdup_printf("stroke:none;fill:url(#%s)", pat_id);
+        rect->setAttribute("style", style_str);
+        g_free(style_str);
+
+        rect->setAttributeOrRemoveIfEmpty("transform", sp_svg_transform_write(parent_transform.inverse()));
+
+        rect->setAttributeSvgDouble("width", bbox.width());
+        rect->setAttributeSvgDouble("height", bbox.height());
+        rect->setAttributeSvgDouble("x", bbox.left());
+        rect->setAttributeSvgDouble("y", bbox.top());
+
+        // restore parent and position
+        parent->getRepr()->addChildAtPos(rect, pos);
+        SPItem *rectangle = static_cast<SPItem *>(document()->getObjectByRepr(rect));
+
+        Inkscape::GC::release(rect);
+
+        clear();
+        set(rectangle);
+    }
+
+
+    DocumentUndo::done(doc, _("Objects to pattern"), "");
+}
+
+void ObjectSet::untile()
+{
+
+    SPDocument *doc = document();
+    Inkscape::XML::Document *xml_doc = doc->getReprDoc();
+
+    // check if something is selected
+    if (isEmpty()) {
+        if(desktop())
+            desktop()->messageStack()->flash(Inkscape::WARNING_MESSAGE, _("Select an <b>object with pattern fill</b> to extract objects from."));
+        return;
+    }
+
+    std::vector<SPItem*> new_select;
+
+    bool did = false;
+
+    std::vector<SPItem*> items_(items().begin(), items().end());
+    for (std::vector<SPItem*>::const_reverse_iterator i=items_.rbegin();i!=items_.rend();++i){
+        SPItem *item = *i;
+
+        SPStyle *style = item->style;
+
+        if (!style || !style->fill.isPaintserver())
+            continue;
+
+        SPPaintServer *server = item->style->getFillPaintServer();
+
+        SPPattern *basePat = dynamic_cast<SPPattern *>(server);
+        if (!basePat) {
+            continue;
+        }
+
+        did = true;
+
+        SPPattern *pattern = basePat->rootPattern();
+
+        Geom::Affine pat_transform = basePat->getTransform();
+        pat_transform *= item->transform;
+
+        for (auto& child: pattern->children) {
+            if (dynamic_cast<SPItem *>(&child)) {
+                Inkscape::XML::Node *copy = child.getRepr()->duplicate(xml_doc);
+                SPItem *i = dynamic_cast<SPItem *>(item->parent->appendChildRepr(copy));
+
+               // FIXME: relink clones to the new canvas objects
+               // use SPObject::setid when mental finishes it to steal ids of
+
+                // this is needed to make sure the new item has curve (simply requestDisplayUpdate does not work)
+                doc->ensureUpToDate();
+
+                if (i) {
+                    Geom::Affine transform( i->transform * pat_transform );
+                    i->doWriteTransform(transform);
+
+                    new_select.push_back(i);
+                } else {
+                    g_assert_not_reached();
+                }
+            }
+        }
+
+        SPCSSAttr *css = sp_repr_css_attr_new();
+        sp_repr_css_set_property(css, "fill", "none");
+        sp_repr_css_change(item->getRepr(), css, "style");
+    }
+
+    if (!did) {
+        if(desktop())
+            desktop()->messageStack()->flash(Inkscape::ERROR_MESSAGE, _("<b>No pattern fills</b> in the selection."));
+    } else {
+        DocumentUndo::done(document(), _("Pattern to objects"), "");
+        setList(new_select);
+    }
+}
+
+void ObjectSet::createBitmapCopy()
+{
+
+    SPDocument *doc = document();
+    Inkscape::XML::Document *xml_doc = doc->getReprDoc();
+
+    // check if something is selected
+    if (isEmpty()) {
+        if(desktop())
+            desktop()->messageStack()->flash(Inkscape::WARNING_MESSAGE, _("Select <b>object(s)</b> to make a bitmap copy."));
+        return;
+    }
+
+    if (desktop()) {
+        desktop()->messageStack()->flash(Inkscape::IMMEDIATE_MESSAGE, _("Rendering bitmap..."));
+        // set "busy" cursor
+        desktop()->setWaitingCursor();
+    }
+
+    // Get the bounding box of the selection
+    doc->ensureUpToDate();
+    Geom::OptRect bbox = documentBounds(SPItem::VISUAL_BBOX);
+    if (!bbox) {
+        if(desktop())
+            desktop()->clearWaitingCursor();
+        return; // exceptional situation, so not bother with a translatable error message, just quit quietly
+    }
+
+    // List of the items to show; all others will be hidden
+    std::vector<SPItem*> items_(items().begin(), items().end());
+
+    // Sort items so that the topmost comes last
+    sort(items_.begin(), items_.end(), sp_item_repr_compare_position_bool);
+
+    // Remember parent and z-order of the topmost one
+    gint pos = items_.back()->getRepr()->position();
+    SPObject *parent_object = items_.back()->parent;
+    Inkscape::XML::Node *parent = parent_object->getRepr();
+
+    // Calculate resolution
+    Inkscape::Preferences *prefs = Inkscape::Preferences::get();
+    double res;
+    int const prefs_res = prefs->getInt("/options/createbitmap/resolution", 0);
+    int const prefs_min = prefs->getInt("/options/createbitmap/minsize", 0);
+    if (0 < prefs_res) {
+        // If it's given explicitly in prefs, take it
+        res = prefs_res;
+    } else if (0 < prefs_min) {
+        // If minsize is given, look up minimum bitmap size (default 250 pixels) and calculate resolution from it
+        res = Inkscape::Util::Quantity::convert(prefs_min, "in", "px") / MIN(bbox->width(), bbox->height());
+    } else {
+
+        // Get export DPI from the first item available
+        auto dpi = Geom::Point(0, 0);
+        for (auto &item : items_) {
+            dpi = item->getExportDpi();
+            if (dpi.x()) break;
+        }
+        if (!dpi.x()) {
+            dpi = doc->getRoot()->getExportDpi();
+        }
+        if (dpi.x()) {
+            res = dpi.x();
+        } else {
+            // if all else fails, take the default 96 dpi
+            res = Inkscape::Util::Quantity::convert(1, "in", "px");
+        }
+    }
+
+    if (res == Inkscape::Util::Quantity::convert(1, "in", "px")) { // for default 96 dpi, snap it to pixel grid
+        bbox = bbox->roundOutwards();
+    }
+
+    Inkscape::Pixbuf *pb = sp_generate_internal_bitmap(doc, *bbox, res, items_);
+
+    if (pb) {
+        // Create the repr for the image
+        Inkscape::XML::Node * repr = xml_doc->createElement("svg:image");
+        sp_embed_image(repr, pb);
+        repr->setAttributeSvgDouble("width", bbox->width());
+        repr->setAttributeSvgDouble("height", bbox->height());
+
+        // Calculate the matrix that will be applied to the image so that it exactly overlaps the source objects
+        SPItem *parentItem = dynamic_cast<SPItem *>(parent_object);
+        Geom::Affine affine = Geom::Translate(bbox->left(), bbox->top()) * parentItem->i2doc_affine().inverse();
+
+        // Write transform
+        repr->setAttributeOrRemoveIfEmpty("transform", sp_svg_transform_write(affine));
+
+        // add the new repr to the parent
+        parent->addChildAtPos(repr, pos + 1);
+
+        // Set selection to the new image
+        clear();
+        add(repr);
+
+        // Clean up
+        Inkscape::GC::release(repr);
+        delete pb;
+
+        // Complete undoable transaction
+        DocumentUndo::done(doc, _("Create bitmap"), INKSCAPE_ICON("selection-make-bitmap-copy"));
+    }
+
+    if(desktop()) {
+        desktop()->clearWaitingCursor();
+    }
+}
+
+/* Creates a mask or clipPath from selection.
+ * What is a clip group?
+ * A clip group is a tangled mess of XML that allows an object inside a group
+ * to clip the entire group using a few <use>s and generally irritating me.
+ */
+
+void ObjectSet::setClipGroup()
+{
+    SPDocument* doc = document();
+    Inkscape::XML::Document *xml_doc = doc->getReprDoc();
+
+    if (isEmpty()) {
+        if(desktop())
+            desktop()->messageStack()->flash(Inkscape::WARNING_MESSAGE, _("Select <b>object(s)</b> to create clippath or mask from."));
+        return;
+    }
+
+    std::vector<Inkscape::XML::Node*> p(xmlNodes().begin(), xmlNodes().end());
+
+    sort(p.begin(),p.end(),sp_repr_compare_position_bool);
+
+    clear();
+
+    int topmost = (p.back())->position();
+    Inkscape::XML::Node *topmost_parent = (p.back())->parent();
+
+    Inkscape::XML::Node *inner = xml_doc->createElement("svg:g");
+    inner->setAttribute("inkscape:label", "Clip");
+
+    for(auto current : p){
+        if (current->parent() == topmost_parent) {
+            Inkscape::XML::Node *spnew = current->duplicate(xml_doc);
+            sp_repr_unparent(current);
+            inner->appendChild(spnew);
+            Inkscape::GC::release(spnew);
+            topmost --; // only reduce count for those items deleted from topmost_parent
+        } else { // move it to topmost_parent first
+            std::vector<Inkscape::XML::Node*> temp_clip;
+
+            // At this point, current may already have no item, due to its being a clone whose original is already moved away
+            // So we copy it artificially calculating the transform from its repr->attr("transform") and the parent transform
+            gchar const *t_str = current->attribute("transform");
+            Geom::Affine item_t(Geom::identity());
+            if (t_str)
+                sp_svg_transform_read(t_str, &item_t);
+            item_t *= SP_ITEM(doc->getObjectByRepr(current->parent()))->i2doc_affine();
+            // FIXME: when moving both clone and original from a transformed group (either by
+            // grouping into another parent, or by cut/paste) the transform from the original's
+            // parent becomes embedded into original itself, and this affects its clones. Fix
+            // this by remembering the transform diffs we write to each item into an array and
+            // then, if this is clone, looking up its original in that array and pre-multiplying
+            // it by the inverse of that original's transform diff.
+
+            sp_selection_copy_one(current, item_t, temp_clip, xml_doc);
+            sp_repr_unparent(current);
+
+            // paste into topmost_parent (temporarily)
+            std::vector<Inkscape::XML::Node*> copied = sp_selection_paste_impl(doc, doc->getObjectByRepr(topmost_parent), temp_clip);
+            if (!copied.empty()) { // if success,
+                // take pasted object (now in topmost_parent)
+                Inkscape::XML::Node *in_topmost = copied.back();
+                // make a copy
+                Inkscape::XML::Node *spnew = in_topmost->duplicate(xml_doc);
+                // remove pasted
+                sp_repr_unparent(in_topmost);
+                // put its copy into group
+                inner->appendChild(spnew);
+                Inkscape::GC::release(spnew);
+            }
+        }
+    }
+
+    Inkscape::XML::Node *outer = xml_doc->createElement("svg:g");
+    outer->appendChild(inner);
+    topmost_parent->addChildAtPos(outer, topmost + 1);
+
+    Inkscape::XML::Node *clone = xml_doc->createElement("svg:use");
+    clone->setAttribute("x", "0");
+    clone->setAttribute("y", "0");
+    clone->setAttribute("xlink:href", g_strdup_printf("#%s", inner->attribute("id")));
+
+    clone->setAttribute("inkscape:transform-center-x", inner->attribute("inkscape:transform-center-x"));
+    clone->setAttribute("inkscape:transform-center-y", inner->attribute("inkscape:transform-center-y"));
+
+    std::vector<Inkscape::XML::Node*> templist;
+    templist.push_back(clone);
+    // add the new clone to the top of the original's parent
+    gchar const *mask_id = SPClipPath::create(templist, doc);
+
+    char* tmp = g_strdup_printf("url(#%s)", mask_id);
+    outer->setAttribute("clip-path", tmp);
+    g_free(tmp);
+
+    Inkscape::GC::release(clone);
+
+    set(outer);
+    DocumentUndo::done(doc, _("Create Clip Group"), "");
+}
+
+/**
+ * Creates a mask or clipPath from selection.
+ * Two different modes:
+ *  if applyToLayer, all selection is moved to DEFS as mask/clippath
+ *       and is applied to current layer
+ *  otherwise, topmost object is used as mask for other objects
+ * If \a apply_clip_path parameter is true, clipPath is created, otherwise mask
+ *
+ */
+ void ObjectSet::setMask(bool apply_clip_path, bool apply_to_layer, bool skip_undo)
+{
+    if(!desktop() && apply_to_layer)
+        return;
+
+    SPDocument *doc = document();
+    Inkscape::XML::Document *xml_doc = doc->getReprDoc();
+
+    // check if something is selected
+    bool is_empty = isEmpty();
+    if ( apply_to_layer && is_empty) {
+        if(desktop())
+            desktop()->messageStack()->flash(Inkscape::WARNING_MESSAGE, _("Select <b>object(s)</b> to create clippath or mask from."));
+        return;
+    } else if (!apply_to_layer && ( is_empty || boost::distance(items())==1 )) {
+        if(desktop())
+            desktop()->messageStack()->flash(Inkscape::WARNING_MESSAGE, _("Select mask object and <b>object(s)</b> to apply clippath or mask to."));
+        return;
+    }
+
+    // FIXME: temporary patch to prevent crash!
+    // Remove this when bboxes are fixed to not blow up on an item clipped/masked with its own clone
+    bool clone_with_original = object_set_contains_both_clone_and_original(this);
+    if (clone_with_original) {
+        return; // in this version, you cannot clip/mask an object with its own clone
+    }
+    // /END FIXME
+
+    doc->ensureUpToDate();
+
+    // Comment out this section because we don't need it, I think.
+    // Also updated comment code to work correctly if indeed it's needed.
+    // To reactivate, remove the next line and uncomment the section.
+    std::vector<SPItem*> items_(items().begin(), items().end());
+    /*
+    std::vector<SPItem*> items_prerect_(items().begin(), items().end());
+    std::vector<SPItem*> items_;
+
+    // convert any rects to paths
+    for (std::vector<SPItem *>::const_iterator i = items_prerect_.begin(); i != items_prerect_.end(); ++i) {
+        clear();
+        if (dynamic_cast<SPRect *>(*i)) {
+            add(*i);
+            toCurves();
+            items_.push_back(*items().begin());
+        } else {
+            items_.push_back(*i);
+        }
+    }
+    clear();
+    */
+    sort(items_.begin(),items_.end(),sp_object_compare_position_bool);
+
+    // See lp bug #542004
+    clear();
+
+    // create a list of duplicates
+    std::vector<std::pair<Inkscape::XML::Node*, Geom::Affine>> mask_items;
+    std::vector<SPItem*> apply_to_items;
+    std::vector<SPItem*> items_to_delete;
+    std::vector<SPItem*> items_to_select;
+
+    Inkscape::Preferences *prefs = Inkscape::Preferences::get();
+    bool topmost = prefs->getBool("/options/maskobject/topmost", true);
+    bool remove_original = prefs->getBool("/options/maskobject/remove", true);
+    int grouping = prefs->getInt("/options/maskobject/grouping", PREFS_MASKOBJECT_GROUPING_NONE);
+
+    if (apply_to_layer) {
+        // all selected items are used for mask, which is applied to a layer
+        apply_to_items.push_back(desktop()->layerManager().currentLayer());
+    }
+
+    for (std::vector<SPItem*>::const_iterator i=items_.begin();i!=items_.end();++i) {
+        if((!topmost && !apply_to_layer && *i == items_.front())
+                || (topmost && !apply_to_layer && *i == items_.back())
+                || apply_to_layer){
+
+            Inkscape::XML::Node *dup = (*i)->getRepr()->duplicate(xml_doc);
+            mask_items.emplace_back(dup, (*i)->i2doc_affine());
+
+            if (remove_original) {
+                items_to_delete.push_back(*i);
+            }
+            else {
+                items_to_select.push_back(*i);
+            }
+            continue;
+        }else{
+            apply_to_items.push_back(*i);
+            items_to_select.push_back(*i);
+        }
+    }
+
+    items_.clear();
+
+    if (grouping == PREFS_MASKOBJECT_GROUPING_ALL) {
+        // group all those objects into one group
+        // and apply mask to that
+        ObjectSet* set = new ObjectSet(document());
+        set->add(apply_to_items.begin(), apply_to_items.end());
+
+        items_to_select.clear();
+
+        Inkscape::XML::Node *group = set->group();
+        group->setAttribute("inkscape:groupmode", "maskhelper");
+
+        // apply clip/mask only to newly created group
+        apply_to_items.clear();
+        apply_to_items.push_back(dynamic_cast<SPItem*>(doc->getObjectByRepr(group)));
+
+        items_to_select.push_back((SPItem*)(doc->getObjectByRepr(group)));
+
+        delete set;
+        Inkscape::GC::release(group);
+    }
+    if (grouping == PREFS_MASKOBJECT_GROUPING_SEPARATE) {
+        items_to_select.clear();
+    }
+
+
+    gchar const *attributeName = apply_clip_path ? "clip-path" : "mask";
+    for (auto i = apply_to_items.rbegin(); i != apply_to_items.rend(); ++i) {
+        SPItem *item = *i;
+        std::vector<Inkscape::XML::Node*> mask_items_dup;
+        std::map<Inkscape::XML::Node*, Geom::Affine> dup_transf;
+        for (auto & mask_item : mask_items) {
+            Inkscape::XML::Node *dup = (mask_item.first)->duplicate(xml_doc);
+            mask_items_dup.push_back(dup);
+            dup_transf[dup] = mask_item.second;
+        }
+
+        Inkscape::XML::Node *current = item->getRepr();
+        // Node to apply mask to
+        Inkscape::XML::Node *apply_mask_to = current;
+
+        if (grouping == PREFS_MASKOBJECT_GROUPING_SEPARATE) {
+            // enclose current node in group, and apply crop/mask on that
+            Inkscape::XML::Node *group = xml_doc->createElement("svg:g");
+            // make a note we should ungroup this when unsetting mask
+            group->setAttribute("inkscape:groupmode", "maskhelper");
+
+            Inkscape::XML::Node *spnew = current->duplicate(xml_doc);
+            current->parent()->addChild(group, current);
+            sp_repr_unparent(current);
+            group->appendChild(spnew);
+
+            // Apply clip/mask to group instead
+            apply_mask_to = group;
+            item = dynamic_cast<SPItem*>(doc->getObjectByRepr(group));
+
+            items_to_select.push_back(item);
+            Inkscape::GC::release(spnew);
+            Inkscape::GC::release(group);
+        }
+
+        gchar const *mask_id = nullptr;
+        if (apply_clip_path) {
+            mask_id = SPClipPath::create(mask_items_dup, doc);
+        } else {
+            mask_id = sp_mask_create(mask_items_dup, doc);
+        }
+
+        // inverted object transform should be applied to a mask object,
+        // as mask is calculated in user space (after applying transform)
+        for (auto & it : mask_items_dup) {
+            SPItem *clip_item = SP_ITEM(doc->getObjectByRepr(it));
+            clip_item->doWriteTransform(dup_transf[it]);
+            clip_item->doWriteTransform(clip_item->transform * item->i2doc_affine().inverse());
+        }
+
+        apply_mask_to->setAttribute(attributeName, Glib::ustring("url(#") + mask_id + ')');
+
+    }
+
+    for (auto i : items_to_delete) {
+        SPObject *item = reinterpret_cast<SPObject*>(i);
+        item->deleteObject(false);
+        items_to_select.erase(std::remove(items_to_select.begin(), items_to_select.end(), item), items_to_select.end());
+    }
+
+    addList(items_to_select);
+    if (!skip_undo) {
+        if (apply_clip_path) {
+            DocumentUndo::done(doc, _("Set clipping path"), "");
+        } else {
+            DocumentUndo::done(doc, _("Set mask"), "");
+        }
+    }
+}
+
+void ObjectSet::unsetMask(const bool apply_clip_path, const bool skip_undo,
+                          const bool delete_helper_group)
+{
+    SPDocument *doc = document();
+    Inkscape::XML::Document *xml_doc = doc->getReprDoc();
+
+    // check if something is selected
+    if (isEmpty()) {
+        if(desktop())
+            desktop()->messageStack()->flash(Inkscape::WARNING_MESSAGE, _("Select <b>object(s)</b> to remove clippath or mask from."));
+        return;
+    }
+
+    Inkscape::Preferences *prefs = Inkscape::Preferences::get();
+    bool remove_original = prefs->getBool("/options/maskobject/remove", true);
+    bool ungroup_masked = prefs->getBool("/options/maskobject/ungrouping", true);
+    doc->ensureUpToDate();
+
+    gchar const *attributeName = apply_clip_path ? "clip-path" : "mask";
+    std::map<SPObject*,SPItem*> referenced_objects;
+
+    std::vector<SPItem*> items_(items().begin(), items().end());
+    clear();
+
+    std::vector<SPGroup *> items_to_ungroup;
+    std::vector<SPItem*> items_to_select(items_);
+
+
+    // SPObject* refers to a group containing the clipped path or mask itself,
+    // whereas SPItem* refers to the item being clipped or masked
+    for (auto i : items_){
+        if (remove_original) {
+            // remember referenced mask/clippath, so orphaned masks can be moved back to document
+            SPItem *item = i;
+            SPObject *obj_ref = nullptr;
+
+            if (apply_clip_path) {
+                obj_ref = item->getClipObject();
+            } else {
+                obj_ref = item->getMaskObject();
+            }
+
+            // collect distinct mask object (and associate with item to apply transform)
+            if (obj_ref) {
+                referenced_objects[obj_ref] = item;
+            }
+        }
+
+        i->setAttribute(attributeName, "none");
+
+        SPGroup *group = dynamic_cast<SPGroup *>(i);
+        if (ungroup_masked && group && delete_helper_group) {
+                // if we had previously enclosed masked object in group,
+                // add it to list so we can ungroup it later
+
+                // ungroup only groups we created when setting clip/mask
+                if (group->layerMode() == SPGroup::MASK_HELPER) {
+                    items_to_ungroup.push_back(group);
+                }
+
+        }
+    }
+
+    // restore mask objects into a document
+    for (auto & referenced_object : referenced_objects) {
+        SPObject *obj = referenced_object.first; // Group containing the clipped paths or masks
+        std::vector<Inkscape::XML::Node *> items_to_move;
+        for (auto& child: obj->children) {
+            // Collect all clipped paths and masks within a single group
+            Inkscape::XML::Node *copy = child.getRepr()->duplicate(xml_doc);
+            if (copy->attribute("inkscape:original-d") && copy->attribute("inkscape:path-effect")) {
+                copy->setAttribute("d", copy->attribute("inkscape:original-d"));
+            } else if (copy->attribute("inkscape:original-d")) {
+                copy->setAttribute("d", copy->attribute("inkscape:original-d"));
+                copy->removeAttribute("inkscape:original-d");
+            } else if (!copy->attribute("inkscape:path-effect") && !SP_IS_PATH(&child)) {
+                copy->removeAttribute("d");
+                copy->removeAttribute("inkscape:original-d");
+            }
+            items_to_move.push_back(copy);
+        }
+
+        if (!obj->isReferenced()) {
+            // delete from defs if no other object references this mask
+            obj->deleteObject(false);
+        }
+
+        // remember parent and position of the item to which the clippath/mask was applied
+        Inkscape::XML::Node *parent = (referenced_object.second)->getRepr()->parent();
+        Inkscape::XML::Node *ref_repr = referenced_object.second->getRepr();
+
+        // Iterate through all clipped paths / masks
+        for (auto i=items_to_move.rbegin();i!=items_to_move.rend();++i) {
+            Inkscape::XML::Node *repr = *i;
+
+            // insert into parent, restore pos
+            parent->addChild(repr, ref_repr);
+
+            SPItem *mask_item = dynamic_cast<SPItem *>(document()->getObjectByRepr(repr));
+            if (!mask_item) {
+                continue;
+            }
+            items_to_select.push_back(mask_item);
+
+            // transform mask, so it is moved the same spot where mask was applied
+            Geom::Affine transform(mask_item->transform);
+            transform *= referenced_object.second->transform;
+            mask_item->doWriteTransform(transform);
+        }
+    }
+
+    // ungroup marked groups added when setting mask
+    for (auto i=items_to_ungroup.rbegin();i!=items_to_ungroup.rend();++i) {
+        SPGroup *group = *i;
+        if (group) {
+            items_to_select.erase(std::remove(items_to_select.begin(), items_to_select.end(), group), items_to_select.end());
+            std::vector<SPItem*> children;
+            sp_item_group_ungroup(group, children, false);
+            items_to_select.insert(items_to_select.end(),children.rbegin(),children.rend());
+        } else {
+            g_assert_not_reached();
+        }
+    }
+
+    // rebuild selection
+    addList(items_to_select);
+    if (!skip_undo) {
+        if (apply_clip_path) {
+            DocumentUndo::done(doc, _("Release clipping path"), "");
+        } else {
+            DocumentUndo::done(doc, _("Release mask"), "");
+        }
+    }
+}
+
+/**
+ * \param with_margins margins defined in the xml under <sodipodi:namedview>
+ *                     "fit-margin-..." attributes.  See SPDocument::fitToRect.
+ * \return true if an undoable change should be recorded.
+ */
+bool ObjectSet::fitCanvas(bool with_margins, bool skip_undo)
+{
+    g_return_val_if_fail(document() != nullptr, false);
+
+    if (isEmpty()) {
+        if(desktop())
+            desktop()->messageStack()->flash(Inkscape::WARNING_MESSAGE, _("Select <b>object(s)</b> to fit canvas to."));
+        return false;
+    }
+    Geom::OptRect const bbox = documentBounds(SPItem::VISUAL_BBOX);
+    if (bbox) {
+        document()->fitToRect(*bbox, with_margins);
+        if(!skip_undo)
+            DocumentUndo::done(document(), _("Fit Page to Selection"), "");
+        return true;
+    } else {
+        return false;
+    }
+}
+
+void ObjectSet::swapFillStroke()
+{
+
+    SPIPaint *paint;
+    SPPaintServer *server;
+    Glib::ustring _paintserver_id;
+
+    auto list= items();
+    for (auto itemlist=list.begin();itemlist!=list.end();++itemlist) {
+        SPItem *item = *itemlist;
+
+        SPCSSAttr *css = sp_repr_css_attr_new ();
+
+        _paintserver_id.clear();
+        paint = &(item->style->fill);
+        if (paint->set && paint->isNone())
+            sp_repr_css_set_property (css, "stroke", "none");
+        else if (paint->set && paint->isColor()) {
+            guint32 color = paint->value.color.toRGBA32(SP_SCALE24_TO_FLOAT (item->style->fill_opacity.value));
+            gchar c[64];
+            sp_svg_write_color (c, sizeof(c), color);
+            sp_repr_css_set_property (css, "stroke", c);
+        }
+        else if (!paint->set)
+            sp_repr_css_unset_property (css, "stroke");
+        else if (paint->set && paint->isPaintserver()) {
+            server = SP_STYLE_FILL_SERVER(item->style);
+            if (server) {
+                Inkscape::XML::Node *srepr = server->getRepr();
+                _paintserver_id += "url(#";
+                _paintserver_id += srepr->attribute("id");
+                _paintserver_id += ")";
+                sp_repr_css_set_property (css, "stroke", _paintserver_id.c_str());
+            }
+        }
+
+        _paintserver_id.clear();
+        paint = &(item->style->stroke);
+        if (paint->set && paint->isNone())
+            sp_repr_css_set_property (css, "fill", "none");
+        else if (paint->set && paint->isColor()) {
+            guint32 color = paint->value.color.toRGBA32(SP_SCALE24_TO_FLOAT (item->style->stroke_opacity.value));
+            gchar c[64];
+            sp_svg_write_color (c, sizeof(c), color);
+            sp_repr_css_set_property (css, "fill", c);
+        }
+        else if (!paint->set)
+            sp_repr_css_unset_property (css, "fill");
+        else if (paint->set && paint->isPaintserver()) {
+            server = SP_STYLE_STROKE_SERVER(item->style);
+            if (server) {
+                Inkscape::XML::Node *srepr = server->getRepr();
+                _paintserver_id += "url(#";
+                _paintserver_id += srepr->attribute("id");
+                _paintserver_id += ")";
+                sp_repr_css_set_property (css, "fill", _paintserver_id.c_str());
+            }
+        }
+
+        if (desktop()) {
+            Inkscape::ObjectSet set{};
+            set.add(item);
+            sp_desktop_set_style(&set, desktop(), css);
+        } else {
+            sp_desktop_apply_css_recursive(item, css, true);
+        }
+
+        sp_repr_css_attr_unref (css);
+    }
+
+    DocumentUndo::done(document(), _("Swap fill and stroke of an object"), "");
+}
+
+/**
+ * Creates a linked fill between all the objects in the current selection using
+ * the "Fill Between Many" LPE. After this method completes, the linked fill
+ * created becomes the new selection, so as to facilitate quick styling of the
+ * fill.
+ *
+ * All objects referred to must have an ID. If an ID does not exist, it will be
+ * created.
+ *
+ * As an additional timesaver, the fill object is created below the bottommost
+ * object in the selection.
+ */
+void ObjectSet::fillBetweenMany()
+{
+    if (isEmpty()) {
+        if (desktop()) {
+            desktop()->messageStack()->flash(Inkscape::WARNING_MESSAGE, _("Select <b>path(s)</b> to create fill between."));
+        }
+
+        return;
+    }
+
+    SPDocument *doc  = document();
+    SPObject *defs   = doc->getDefs();
+    SPObject *effect = nullptr;
+
+    Inkscape::XML::Node *effectRepr = doc->getReprDoc()->createElement("inkscape:path-effect");
+    Inkscape::XML::Node *fillRepr   = doc->getReprDoc()->createElement("svg:path");
+
+    Glib::ustring acc;
+    Glib::ustring pathTarget;
+
+    for (auto&& item : items()) {
+        // Force-assign id if there is none present
+        if (!item->getId()) {
+            gchar *id = sp_object_get_unique_id(item, nullptr);
+            item->set(SPAttr::ID, id);
+            item->updateRepr();
+            g_free(id);
+        }
+
+        acc += "#";
+        acc += item->getId();
+        acc += ",0,1|";
+    }
+
+    effectRepr->setAttribute("effect", "fill_between_many");
+    effectRepr->setAttribute("method", "originald");
+    effectRepr->setAttribute("linkedpaths", acc.c_str());
+    defs->appendChild(effectRepr);
+
+    effect = doc->getObjectByRepr(effectRepr);
+    pathTarget += "#";
+    pathTarget += effect->getId();
+
+    fillRepr->setAttribute("inkscape:original-d", "M 0,0");
+    fillRepr->setAttribute("inkscape:path-effect", pathTarget.c_str());
+    fillRepr->setAttribute("d", "M 0,0");
+
+    // Get bottommost element in selection to create fill underneath
+    auto&& items_ = std::vector<SPObject*>(items().begin(), items().end());
+    SPObject *first = *std::min_element(items_.begin(), items_.end(), sp_object_compare_position_bool);
+    SPObject *prev  = first->getPrev();
+
+    first->parent->addChild(fillRepr, prev ? prev->getRepr() : nullptr);
+
+    doc->ensureUpToDate();
+
+    clear();
+    add(fillRepr);
+
+    DocumentUndo::done(doc, _("Create linked fill object between paths"), "");
+}
+
+/**
+ * Associates the given SPItem with a SiblingState enum
+ * Needed for handling special cases while transforming objects
+ * Inserts the [SPItem, SiblingState] pair to ObjectSet._sibling_state map
+ * @param item
+ * @return the SiblingState
+ */
+SiblingState
+ObjectSet::getSiblingState(SPItem *item) {
+    auto offset = dynamic_cast<SPOffset *>(item);
+    auto flowtext = dynamic_cast<SPFlowtext *>(item);
+
+    auto check_item = _sibling_state.find(item);
+    if (check_item != _sibling_state.end() && check_item->second > SiblingState::SIBLING_NONE) {
+        return check_item->second;
+    }
+
+    SiblingState ret = SiblingState::SIBLING_NONE;
+
+	// moving both a clone and its original or any ancestor
+    if (object_set_contains_original(item, this)) {
+        ret = SiblingState::SIBLING_CLONE_ORIGINAL;
+
+	// moving both a text-on-path and its path
+    } else if ((dynamic_cast<SPText *>(item) && item->firstChild() && dynamic_cast<SPTextPath *>(item->firstChild())) &&
+                    includes(sp_textpath_get_path_item(dynamic_cast<SPTextPath *>(item->firstChild())))) {
+        ret = SiblingState::SIBLING_TEXT_PATH;
+
+	// moving both a flowtext and its frame
+    } else if (flowtext && includes(flowtext->get_frame(nullptr))) {
+        ret = SiblingState::SIBLING_TEXT_FLOW_FRAME;
+
+	// moving both an offset and its source
+    } else if (offset && offset->sourceHref && includes(sp_offset_get_source(offset))) {
+        ret = SiblingState::SIBLING_OFFSET_SOURCE;
+
+	// moving object containing sub object
+    } else if (item->style && item->style->shape_inside.containsAnyShape(this)) {
+        ret = SiblingState::SIBLING_TEXT_SHAPE_INSIDE;
+    }
+
+	_sibling_state[item] = ret;
+
+    return ret;
+}
+
+void
+ObjectSet::clearSiblingStates()
+{
+    _sibling_state.clear();
+}
+
+/**
+ * \param with_margins margins defined in the xml under <sodipodi:namedview>
+ *                     "fit-margin-..." attributes.  See SPDocument::fitToRect.
+ *
+ * WARNING: this is a page naive and it will break multi page documents.
+ */
+bool
+fit_canvas_to_drawing(SPDocument *doc, bool with_margins)
+{
+    g_return_val_if_fail(doc != nullptr, false);
+
+    doc->ensureUpToDate();
+    SPItem const *const root = doc->getRoot();
+    Geom::OptRect bbox = root->documentVisualBounds();
+    if (bbox) {
+        doc->fitToRect(*bbox, with_margins);
+        return true;
+    } else {
+        return false;
+    }
+}
+
+void
+fit_canvas_to_drawing(SPDesktop *desktop)
+{
+    if (fit_canvas_to_drawing(desktop->getDocument())) {
+        DocumentUndo::done(desktop->getDocument(), _("Fit Page to Drawing"), "");
+    }
+}
+
+static void itemtree_map(void (*f)(SPItem *, SPDesktop *), SPObject *root, SPDesktop *desktop) {
+    // don't operate on layers
+    {
+        SPItem *item = dynamic_cast<SPItem *>(root);
+        if (item && !desktop->layerManager().isLayer(item)) {
+            f(item, desktop);
+        }
+    }
+    for (auto& child: root->children) {
+        //don't recurse into locked layers
+        SPItem *item = dynamic_cast<SPItem *>(&child);
+        if (!(item && desktop->layerManager().isLayer(item) && item->isLocked())) {
+            itemtree_map(f, &child, desktop);
+        }
+    }
+}
+
+static void unlock(SPItem *item, SPDesktop */*desktop*/) {
+    if (item->isLocked()) {
+        item->setLocked(FALSE);
+    }
+}
+
+static void unhide(SPItem *item, SPDesktop *desktop) {
+    if (desktop->itemIsHidden(item)) {
+        item->setExplicitlyHidden(FALSE);
+    }
+}
+
+static void process_all(void (*f)(SPItem *, SPDesktop *), SPDesktop *dt, bool layer_only) {
+    if (!dt) return;
+
+    SPObject *root;
+    if (layer_only) {
+        root = dt->layerManager().currentLayer();
+    } else {
+        root = dt->layerManager().currentRoot();
+    }
+
+    itemtree_map(f, root, dt);
+}
+
+void unlock_all(SPDesktop *dt) {
+    process_all(&unlock, dt, true);
+}
+
+void unlock_all_in_all_layers(SPDesktop *dt) {
+    process_all(&unlock, dt, false);
+}
+
+void unhide_all(SPDesktop *dt) {
+    process_all(&unhide, dt, true);
+}
+
+void unhide_all_in_all_layers(SPDesktop *dt) {
+    process_all(&unhide, dt, false);
+}
+
+
+/*
+  Local Variables:
+  mode:c++
+  c-file-style:"stroustrup"
+  c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
+  indent-tabs-mode:nil
+  fill-column:99
+  End:
+*/
+// vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:fileencoding=utf-8:textwidth=99 :