Adding upstream version 1.2.2.upstream/1.2.2upstream

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

1 files changed, 1877 insertions, 0 deletions

diff --git a/src/seltrans.cpp b/src/seltrans.cpp
new file mode 100644
index 0000000..e31db44
--- /dev/null
+++ b/src/seltrans.cpp
@@ -0,0 +1,1877 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/** @file
+ * Helper object for transforming selected items.
+ */
+/* Authors:
+ *   Lauris Kaplinski <lauris@kaplinski.com>
+ *   bulia byak <buliabyak@users.sf.net>
+ *   Carl Hetherington <inkscape@carlh.net>
+ *   Diederik van Lierop <mail@diedenrezi.nl>
+ *   Abhishek Sharma
+ *
+ * Copyright (C) 1999-2002 Lauris Kaplinski
+ * Copyright (C) 1999-2014 Authors
+ *
+ * Released under GNU GPL v2+, read the file 'COPYING' for more information.
+ */
+
+#include <cstring>
+#include <string>
+
+#include <gdk/gdkkeysyms.h>
+#include <glibmm/i18n.h>
+
+#include <2geom/transforms.h>
+
+#include "seltrans.h"
+
+#include "desktop-style.h"
+#include "desktop.h"
+#include "document-undo.h"
+#include "document.h"
+#include "message-stack.h"
+#include "mod360.h"
+#include "pure-transform.h"
+#include "selection-chemistry.h"
+#include "filter-chemistry.h"
+#include "selection.h"
+#include "seltrans-handles.h"
+
+#include "display/control/snap-indicator.h"
+#include "display/control/canvas-item-ctrl.h"
+#include "display/control/canvas-item-curve.h"
+#include "display/control/canvas-item-enums.h"
+#include "display/control/canvas-item-group.h"
+#include "live_effects/effect-enum.h"
+#include "live_effects/effect.h"
+#include "live_effects/lpe-bool.h"
+
+#include "object/sp-item-transform.h"
+#include "object/sp-namedview.h"
+#include "object/sp-root.h"
+
+#include "ui/icon-names.h"
+#include "ui/modifiers.h"
+#include "ui/knot/knot.h"
+#include "ui/tools/select-tool.h"
+
+using Inkscape::DocumentUndo;
+
+static void sp_sel_trans_handle_grab(SPKnot *knot, guint state, SPSelTransHandle const* data);
+static void sp_sel_trans_handle_ungrab(SPKnot *knot, guint state, SPSelTransHandle const* data);
+static void sp_sel_trans_handle_click(SPKnot *knot, guint state, SPSelTransHandle const* data);
+static void sp_sel_trans_handle_new_event(SPKnot *knot, Geom::Point const &position, guint32 state, SPSelTransHandle const* data);
+static gboolean sp_sel_trans_handle_request(SPKnot *knot, Geom::Point *p, guint state, SPSelTransHandle const *data);
+
+static gboolean sp_sel_trans_handle_event(SPKnot *knot, GdkEvent *event, SPSelTransHandle const*)
+{
+    switch (event->type) {
+        case GDK_MOTION_NOTIFY:
+            break;
+        case GDK_KEY_PRESS:
+            if (Inkscape::UI::Tools::get_latin_keyval (&event->key) == GDK_KEY_space) {
+                /* stamping mode: both mode(show content and outline) operation with knot */
+                if (!knot->is_grabbed()) {
+                    return FALSE;
+                }
+                SPDesktop *desktop = knot->desktop;
+                Inkscape::SelTrans *seltrans = SP_SELECT_CONTEXT(desktop->event_context)->_seltrans;
+                seltrans->stamp();
+                return TRUE;
+            }
+            break;
+        default:
+            break;
+    }
+
+    return FALSE;
+}
+
+Inkscape::SelTrans::BoundingBoxPrefsObserver::BoundingBoxPrefsObserver(SelTrans &sel_trans) :
+    Observer("/tools/bounding_box"),
+    _sel_trans(sel_trans)
+{
+}
+
+void Inkscape::SelTrans::BoundingBoxPrefsObserver::notify(Preferences::Entry const &val)
+{
+    _sel_trans._boundingBoxPrefsChanged(static_cast<int>(val.getBool()));
+}
+
+Inkscape::SelTrans::SelTrans(SPDesktop *desktop) :
+    _desktop(desktop),
+    _selcue(desktop),
+    _state(STATE_SCALE),
+    _show(SHOW_CONTENT),
+    _bbox(),
+    _stroked_bbox(),
+    _message_context(desktop->messageStack()),
+    _bounding_box_prefs_observer(*this)
+{
+    Inkscape::Preferences *prefs = Inkscape::Preferences::get();
+    int prefs_bbox = prefs->getBool("/tools/bounding_box");
+    _snap_bbox_type = !prefs_bbox ?
+        SPItem::VISUAL_BBOX : SPItem::GEOMETRIC_BBOX;
+
+    g_return_if_fail(desktop != nullptr);
+
+    _updateVolatileState();
+    _current_relative_affine.setIdentity();
+
+    _center_is_set = false; // reread _center from items, or set to bbox midpoint
+
+    _makeHandles();
+    _updateHandles();
+
+    _selection = desktop->getSelection();
+
+    _norm = new CanvasItemCtrl(desktop->getCanvasControls(), Inkscape::CANVAS_ITEM_CTRL_TYPE_CENTER);
+    _norm->set_fill(0x0);
+    _norm->set_stroke(0xff0000b0);
+    _norm->hide();
+
+    _grip = new CanvasItemCtrl(desktop->getCanvasControls(), Inkscape::CANVAS_ITEM_CTRL_TYPE_POINT);
+    _grip->set_fill(0xffffff7f);
+    _grip->set_stroke(0xff0000b0);
+    _grip->hide();
+
+    for (auto & i : _l) {
+        i = new Inkscape::CanvasItemCurve(desktop->getCanvasControls());
+        i->hide();
+    }
+
+    _sel_changed_connection = _selection->connectChanged(
+        sigc::mem_fun(*this, &Inkscape::SelTrans::_selChanged)
+        );
+
+    _sel_modified_connection = _selection->connectModified(
+        sigc::mem_fun(*this, &Inkscape::SelTrans::_selModified)
+        );
+
+    _all_snap_sources_iter = _all_snap_sources_sorted.end();
+
+    prefs->addObserver(_bounding_box_prefs_observer);
+}
+
+Inkscape::SelTrans::~SelTrans()
+{
+    _sel_changed_connection.disconnect();
+    _sel_modified_connection.disconnect();
+
+    for (auto & knot : knots) {
+        knot_unref(knot);
+        knot = nullptr;
+    }
+
+    if (_norm) {
+        delete _norm;
+    }
+
+    if (_grip) {
+        delete _grip;
+    }
+
+    for (auto & i : _l) {
+        if (i) {
+            delete i;
+        }
+    }
+
+    if (_stamped) {
+        for (auto old_obj :_stamp_cache) {
+            SPLPEItem *oldLPEObj = dynamic_cast<SPLPEItem *>(old_obj);
+            if (oldLPEObj) {
+                sp_lpe_item_enable_path_effects(oldLPEObj,true);
+            }
+        }
+    }
+
+    for (auto & _item : _items) {
+        sp_object_unref(_item, nullptr);
+    }
+
+    _items.clear();
+    _objects_const.clear();
+    _items_affines.clear();
+    _items_centers.clear();
+}
+
+void Inkscape::SelTrans::resetState()
+{
+    _state = STATE_SCALE;
+}
+
+void Inkscape::SelTrans::increaseState()
+{
+    Inkscape::Preferences *prefs = Inkscape::Preferences::get();
+    bool show_align = prefs->getBool("/dialogs/align/oncanvas", false);
+        
+    if (_state == STATE_SCALE) {
+        _state = STATE_ROTATE;
+    } else if (_state == STATE_ROTATE && show_align) {
+        _state = STATE_ALIGN;
+    } else {
+        _state = STATE_SCALE;
+    }
+
+    _center_is_set = true; // no need to reread center
+
+    _updateHandles();
+}
+
+void Inkscape::SelTrans::setCenter(Geom::Point const &p)
+{
+    _center = p;
+    _center_is_set = true;
+
+    // Write the new center position into all selected items
+    auto items= _desktop->selection->items();
+    for (auto it : items) {
+        it->setCenter(p);
+        // only set the value; updating repr and document_done will be done once, on ungrab
+    }
+
+    _updateHandles();
+}
+
+void Inkscape::SelTrans::grab(Geom::Point const &p, gdouble x, gdouble y, bool show_handles, bool translating)
+{
+    // While dragging a handle, we will either scale, skew, or rotate and the "translating" parameter will be false
+    // When dragging the selected item itself however, we will translate the selection and that parameter will be true
+    Inkscape::Selection *selection = _desktop->getSelection();
+    Inkscape::Preferences *prefs = Inkscape::Preferences::get();
+
+    g_return_if_fail(!_grabbed);
+
+    _grabbed = true;
+    _show_handles = show_handles;
+    _updateVolatileState();
+    _current_relative_affine.setIdentity();
+
+    _changed = false;
+
+    if (_empty) {
+        return;
+    }
+
+    auto items= _desktop->selection->items();
+    for (auto iter=items.begin();iter!=items.end(); ++iter) {
+        SPItem *it = static_cast<SPItem*>(sp_object_ref(*iter, nullptr));
+        _items.push_back(it);
+        _objects_const.push_back(it);
+        _items_affines.push_back(it->i2dt_affine());
+        _items_centers.push_back(it->getCenter()); // for content-dragging, we need to remember original centers
+        SPLPEItem *lpeitem = dynamic_cast<SPLPEItem *>(it);
+        if (lpeitem && lpeitem->hasPathEffectRecursive()) {
+            sp_lpe_item_update_patheffect(lpeitem, true, false);
+        }
+    }
+
+    if (y != -1 && _desktop->is_yaxisdown()) {
+        y = 1 - y;
+    }
+
+    _handle_x = x;
+    _handle_y = y;
+
+    // The selector tool should snap the bbox, special snappoints, and path nodes
+    // (The special points are the handles, center, rotation axis, font baseline, ends of spiral, etc.)
+
+    // First, determine the bounding box
+    _bbox = selection->bounds(_snap_bbox_type);
+    _stroked_bbox = selection->strokedBounds(); // Used for correctly scaling the strokewidth
+    _geometric_bbox = selection->geometricBounds();
+
+    _point = p;
+    if (_geometric_bbox) {
+        _point_geom = _geometric_bbox->min() + _geometric_bbox->dimensions() * Geom::Scale(x, y);
+    } else {
+        _point_geom = p;
+    }
+
+    // Next, get all points to consider for snapping
+    SnapManager const &m = _desktop->namedview->snap_manager;
+    _snap_points.clear();
+    if (m.someSnapperMightSnap(false)) { // Only search for snap sources when really needed, to avoid unnecessary delays
+        _snap_points = selection->getSnapPoints(&m.snapprefs); // This might take some time!
+    }
+    if (_snap_points.size() > 200 && !(prefs->getBool("/options/snapclosestonly/value", false))) {
+        /* Snapping a huge number of nodes will take way too long, so limit the number of snappable nodes
+        A typical user would rarely ever try to snap such a large number of nodes anyway, because
+        (s)he would hardly be able to discern which node would be snapping */
+        std::cerr << "Warning: limit of 200 snap sources reached, some will be ignored" << std::endl;
+        _snap_points.resize(200);
+        // Unfortunately, by now we will have lost the font-baseline snappoints :-(
+    }
+
+    // Find bbox hulling all special points, which excludes stroke width. Here we need to include the
+    // path nodes, for example because a rectangle which has been converted to a path doesn't have
+    // any other special points
+    Geom::OptRect snap_points_bbox = selection->bounds(SPItem::GEOMETRIC_BBOX);
+
+    _bbox_points.clear();
+    // Collect the bounding box's corners and midpoints for each selected item
+    if (m.snapprefs.isTargetSnappable(SNAPTARGET_BBOX_CATEGORY, SNAPTARGET_ALIGNMENT_CATEGORY, SNAPTARGET_DISTRIBUTION_CATEGORY)) {
+        bool c = m.snapprefs.isTargetSnappable(SNAPTARGET_BBOX_CORNER, SNAPTARGET_ALIGNMENT_CATEGORY, SNAPTARGET_DISTRIBUTION_CATEGORY);
+        bool mp = m.snapprefs.isTargetSnappable(SNAPTARGET_BBOX_MIDPOINT, SNAPTARGET_ALIGNMENT_CATEGORY, SNAPTARGET_DISTRIBUTION_CATEGORY);
+        bool emp = m.snapprefs.isTargetSnappable(SNAPTARGET_BBOX_EDGE_MIDPOINT);
+        // Preferably we'd use the bbox of each selected item, but for example 50 items will produce at least 200 bbox points,
+        // which might make Inkscape crawl(see the comment a few lines above). In that case we will use the bbox of the selection as a whole
+        bool c1 = (_items.size() > 0) && (_items.size() < 50);
+        bool c2 = prefs->getBool("/options/snapclosestonly/value", false);
+        if (translating && (c1 || c2)) {
+            // Get the bounding box points for each item in the selection
+            for (auto & _item : _items) {
+                Geom::OptRect b = _item->desktopBounds(_snap_bbox_type);
+                getBBoxPoints(b, &_bbox_points, false, c, emp, mp);
+            }
+        } else {
+            // Only get the bounding box points of the selection as a whole
+            getBBoxPoints(selection->bounds(_snap_bbox_type), &_bbox_points, false, c, emp, mp);
+        }
+    }
+
+    if (_bbox) {
+        // There are two separate "opposites" (i.e. opposite w.r.t. the handle being dragged):
+        //  - one for snapping the boundingbox, which can be either visual or geometric
+        //  - one for snapping the special points
+        // The "opposite" in case of a geometric boundingbox always coincides with the "opposite" for the special points
+        // These distinct "opposites" are needed in the snapmanager to avoid bugs such as LP167905 (in which
+        // a box is caught between two guides)
+        _opposite_for_bboxpoints = _bbox->min() + _bbox->dimensions() * Geom::Scale(1-x, 1-y);
+        if (snap_points_bbox) {
+            _opposite_for_specpoints = (*snap_points_bbox).min() + (*snap_points_bbox).dimensions() * Geom::Scale(1-x, 1-y);
+        } else {
+            _opposite_for_specpoints = _opposite_for_bboxpoints;
+        }
+        _opposite = _opposite_for_bboxpoints;
+    }
+
+    // When snapping the node closest to the mouse pointer is absolutely preferred over the closest snap
+    // (i.e. when weight == 1), then we will not even try to snap to other points and disregard those other points
+
+    if (prefs->getBool("/options/snapclosestonly/value", false)) {
+        _keepClosestPointOnly(p);
+    }
+
+    if ((x != -1) && (y != -1)) {
+        _norm->show();
+        _grip->show();
+    }
+
+    if (_show == SHOW_OUTLINE) {
+        for (auto & i : _l)
+            i->show();
+    }
+
+    _updateHandles();
+    g_return_if_fail(_stamp_cache.empty());
+}
+
+void Inkscape::SelTrans::transform(Geom::Affine const &rel_affine, Geom::Point const &norm)
+{
+    g_return_if_fail(_grabbed);
+    g_return_if_fail(!_empty);
+
+    Geom::Affine const affine( Geom::Translate(-norm) * rel_affine * Geom::Translate(norm) );
+
+    if (_show == SHOW_CONTENT) {
+        auto selection = _desktop->getSelection();
+        // update the content
+        for (unsigned i = 0; i < _items.size(); i++) {
+            SPItem &item = *_items[i];
+            if( SP_IS_ROOT(&item) ) {
+                _desktop->messageStack()->flash(Inkscape::WARNING_MESSAGE, _("Cannot transform an embedded SVG."));
+                break;
+            }
+
+            SiblingState sibling_state = selection->getSiblingState(&item);
+
+            /**
+             * Need checks for each SiblingState
+             * Outside of SIBLING_TEXT_SHAPE_INSIDE and SIBLING_TEXT_PATH,
+             * the rest of them need testing
+             * This just skips the transformation
+             */
+            if (sibling_state == SiblingState::SIBLING_TEXT_SHAPE_INSIDE || sibling_state == SiblingState::SIBLING_TEXT_PATH) {
+                continue;
+            }
+
+            Geom::Affine const &prev_transform = _items_affines[i];
+            item.set_i2d_affine(prev_transform * affine);
+            SPLPEItem *lpeitem = dynamic_cast<SPLPEItem *>(item.parent);
+            if (lpeitem && lpeitem->hasPathEffectRecursive()) {
+                sp_lpe_item_update_patheffect(lpeitem, true, false);
+            }
+            // The new affine will only have been applied if the transformation is different from the previous one, see SPItem::set_item_transform
+        }
+    } else {
+        if (_bbox) {
+            Geom::Point p[4];
+            /* update the outline */
+            for (unsigned i = 0 ; i < 4 ; i++) {
+                p[i] = _bbox->corner(i) * affine;
+            }
+            for (unsigned i = 0 ; i < 4 ; i++) {
+                _l[i]->set_coords(p[i], p[(i+1)%4]);
+            }
+        }
+    }
+
+    _current_relative_affine = affine;
+    _changed = true;
+    _updateHandles();
+}
+
+void sp_meassure_lpe_update(SPLPEItem *item, bool root) {
+    SPGroup *group = dynamic_cast<SPGroup *>(item);
+    SPLPEItem *lpeitem = dynamic_cast<SPLPEItem *>(item);
+    if (group) {
+        std::vector<SPObject*> l = group->childList(false);
+        for(auto o : l){
+            SPLPEItem *olpeitem = dynamic_cast<SPLPEItem *>(o);
+            if (olpeitem) {
+                sp_meassure_lpe_update(olpeitem, false);
+            }
+        }
+    } else if (!root && lpeitem && lpeitem->hasPathEffectOfType(Inkscape::LivePathEffect::EffectType::MEASURE_SEGMENTS)) {
+        sp_lpe_item_update_patheffect(lpeitem, false, false);
+    }
+}
+
+void Inkscape::SelTrans::ungrab()
+{
+    g_return_if_fail(_grabbed);
+    _grabbed = false;
+    _show_handles = true;
+
+    _desktop->snapindicator->remove_snapsource();
+
+    Inkscape::Selection *selection = _desktop->getSelection();
+    _updateVolatileState();
+
+    for (auto & _item : _items) {
+        sp_object_unref(_item, nullptr);
+    }
+
+    _norm->hide();
+    _grip->hide();
+
+    if (_show == SHOW_OUTLINE) {
+        for (auto & i : _l)
+            i->hide();
+    }
+    if (_stamped) {
+        _stamped = false;
+        for (auto old_obj :_stamp_cache) {
+            SPLPEItem *oldLPEObj = dynamic_cast<SPLPEItem *>(old_obj);
+            if (oldLPEObj) {
+                sp_lpe_item_enable_path_effects(oldLPEObj,true);
+            }
+        }
+    }
+    if(!_stamp_cache.empty()){
+        _stamp_cache.clear();
+    }
+
+    _message_context.clear();
+
+    if (!_empty && _changed) {
+        if (!_current_relative_affine.isIdentity()) { // we can have a identity affine
+            // when trying to stretch a perfectly vertical line in horizontal direction, which will not be allowed by the handles;
+
+            selection->applyAffine(_current_relative_affine, (_show == SHOW_OUTLINE) ? true : false);
+            if (_center) {
+                *_center *= _current_relative_affine;
+                _center_is_set = true;
+            }
+
+            // If dragging showed content live, sp_selection_apply_affine cannot change the centers
+            // appropriately - it does not know the original positions of the centers (all objects already have
+            // the new bboxes). So we need to reset the centers from our saved array.
+            if (_show != SHOW_OUTLINE && !_current_relative_affine.isTranslation()) {
+                for (unsigned i = 0; i < _items_centers.size(); i++) {
+                    SPItem *currentItem = _items[i];
+                    if (currentItem->isCenterSet()) { // only if it's already set
+                        currentItem->setCenter (_items_centers[i] * _current_relative_affine);
+                        currentItem->updateRepr();
+                    }
+                }
+            }
+            for (unsigned i = 0; i < _items_centers.size(); i++) {
+                SPLPEItem *currentItem = dynamic_cast<SPLPEItem *>(_items[i]);
+                sp_meassure_lpe_update(currentItem, true);
+            }
+        }
+
+        _items.clear();
+        _objects_const.clear();
+        _items_affines.clear();
+        _items_centers.clear();
+
+        if (!_current_relative_affine.isIdentity()) { // we can have a identity affine
+            // when trying to stretch a perfectly vertical line in horizontal direction, which will not be allowed
+            // by the handles; this would be identified as a (zero) translation by isTranslation()
+            if (_current_relative_affine.isTranslation()) {
+                DocumentUndo::done(_desktop->getDocument(), _("Move"), INKSCAPE_ICON("tool-pointer"));
+            } else if (_current_relative_affine.withoutTranslation().isScale()) {
+                DocumentUndo::done(_desktop->getDocument(), _("Scale"), INKSCAPE_ICON("tool-pointer"));
+            } else if (_current_relative_affine.withoutTranslation().isRotation()) {
+                DocumentUndo::done(_desktop->getDocument(), _("Rotate"), INKSCAPE_ICON("tool-pointer"));
+            } else {
+                DocumentUndo::done(_desktop->getDocument(), _("Skew"), INKSCAPE_ICON("tool-pointer"));
+            }
+        } else {
+            _updateHandles();
+        }
+
+    } else {
+
+        if (_center_is_set) {
+            // we were dragging center; update reprs and commit undoable action
+        	auto items= _desktop->selection->items();
+            for (auto iter=items.begin();iter!=items.end(); ++iter) {
+                SPItem *it = *iter;
+                it->updateRepr();
+            }
+            DocumentUndo::done(_desktop->getDocument(), _("Set center"), INKSCAPE_ICON("tool-pointer"));
+        }
+
+        _items.clear();
+        _objects_const.clear();
+        _items_affines.clear();
+        _items_centers.clear();
+        _updateHandles();
+    }
+
+    _desktop->snapindicator->remove_snaptarget();
+}
+
+/* fixme: This is really bad, as we compare positions for each stamp (Lauris) */
+/* fixme: IMHO the best way to keep sort cache would be to implement timestamping at last */
+
+void Inkscape::SelTrans::stamp()
+{
+    Inkscape::Selection *selection = _desktop->getSelection();
+
+    bool fixup = !_grabbed;
+    if ( fixup && !_stamp_cache.empty() ) {
+        // TODO - give a proper fix. Simple temporary work-around for the grab() issue
+        _stamp_cache.clear();
+    }
+
+    /* stamping mode */
+    if (!_empty) {
+        _stamped = true;
+    	std::vector<SPItem*> l;
+        if (!_stamp_cache.empty()) {
+            l = _stamp_cache;
+        } else {
+            /* Build cache */
+            l.insert(l.end(), selection->items().begin(), selection->items().end());
+            sort(l.begin(), l.end(), sp_object_compare_position_bool);
+            _stamp_cache = l;
+            // we disable LPE while stamping and reenable on ungrab with _stamped bool
+            for (auto old_obj : l) {
+                SPLPEItem *oldLPEObj = dynamic_cast<SPLPEItem *>(old_obj);
+                if (oldLPEObj) {
+                    sp_lpe_item_enable_path_effects(oldLPEObj, false);
+                }
+            }
+        }
+        std::vector<Inkscape::XML::Node *> copies;
+        // special case on clones when dragging a clone without its original
+        // we check if its satellite is selected. if it has a clone original
+        // to allow perform the write statement on line:616
+        bool lpewritetransforms = true;
+        for (auto old_obj : l) {
+            SPLPEItem *oldLPEObj = dynamic_cast<SPLPEItem *>(old_obj);
+            if (oldLPEObj) {
+                auto effect = oldLPEObj->getFirstPathEffectOfType(Inkscape::LivePathEffect::CLONE_ORIGINAL);
+                if (effect) {
+                    std::vector<SPObject *> satellites = effect->effect_get_satellites();
+                    for (auto obj : satellites) {
+                        if (!selection->includes(obj)) {
+                            lpewritetransforms = false;
+                        }
+                    }
+                }
+                effect = oldLPEObj->getFirstPathEffectOfType(Inkscape::LivePathEffect::BEND_PATH);
+                if (effect) {
+                    if (!oldLPEObj->optimizeTransforms() && selection->includes(oldLPEObj)) {
+                        lpewritetransforms = false;
+                        std::vector<SPObject *> satellites = effect->effect_get_satellites();
+                        for (auto obj : satellites) {
+                            if (selection->includes(obj)) {
+                                lpewritetransforms = true;
+                            }
+                        }
+                    }
+                }
+            }
+        }
+        for(auto &original_item : l) {
+            Inkscape::XML::Node *original_repr = original_item->getRepr();
+
+            // remember parent
+            Inkscape::XML::Node *parent = original_repr->parent();
+
+            Inkscape::XML::Node *copy_repr = original_repr->duplicate(parent->document());
+
+            // add the new repr to the parent
+            parent->addChild(copy_repr, original_repr->prev());
+
+            SPItem *copy_item = (SPItem *) _desktop->getDocument()->getObjectByRepr(copy_repr);
+            Geom::Affine const *new_affine;
+            if (_show == SHOW_OUTLINE) {
+                Geom::Affine const i2d(original_item->i2dt_affine());
+                Geom::Affine const i2dnew( i2d * _current_relative_affine );
+                copy_item->set_i2d_affine(i2dnew);
+                new_affine = &copy_item->transform;
+            } else {
+                new_affine = &original_item->transform;
+            }
+            original_item->setSuccessor(copy_item);
+            SPLPEItem *newLPEObj = dynamic_cast<SPLPEItem *>(copy_item);
+            if (newLPEObj) {
+                // disable LPE bool on dowrite to prevent move of selection original satellite
+                // when unselected (lpe performs a transform function that moves satellite and
+                // on unselect, goes to the wrong place)
+                if (newLPEObj->hasPathEffectOfType(Inkscape::LivePathEffect::BOOL_OP)) {
+                    sp_lpe_item_enable_path_effects(newLPEObj,false);
+                }
+            }
+            if (!newLPEObj || 
+                !lpewritetransforms || 
+                (!newLPEObj->hasPathEffectOfType(Inkscape::LivePathEffect::CLONE_ORIGINAL) &&
+                 !newLPEObj->hasPathEffectOfType(Inkscape::LivePathEffect::BEND_PATH))) 
+            {
+                copy_item->doWriteTransform(*new_affine);
+                if ( copy_item->isCenterSet() && _center ) {
+                    copy_item->setCenter(*_center * _current_relative_affine);
+                }
+            }
+            Inkscape::GC::release(copy_repr);
+            copies.push_back(copy_repr);
+        }
+        for (auto node : copies) {
+            SPObject *new_obj = _desktop->getDocument()->getObjectByRepr(node);
+            SPLPEItem *newLPEObj = dynamic_cast<SPLPEItem *>(new_obj);
+            if (newLPEObj) {
+                sp_lpe_item_enable_path_effects(newLPEObj,true);
+                // we need 0 to force fork, we are sure we need new LPE and with 
+                // 1 sometimes (slice LPE) doesn't work
+                newLPEObj->forkPathEffectsIfNecessary(0);
+                sp_lpe_item_update_patheffect(newLPEObj, false, true);
+            }
+        }
+        for(auto original_item : l) {
+            // unrefering tmp _sucessor (not needed anymore) used on fork to keep new satellite 
+            // items forked along the LPEs
+            if (original_item->_successor) {
+                sp_object_unref(original_item->_successor, nullptr);
+                original_item->_successor = nullptr;
+            }
+        }
+        DocumentUndo::done(_desktop->getDocument(), _("Stamp"), INKSCAPE_ICON("tool-pointer"));
+    }
+
+    if ( fixup && !_stamp_cache.empty() ) {
+        // TODO - give a proper fix. Simple temporary work-around for the grab() issue
+        _stamp_cache.clear();
+    }
+}
+
+void Inkscape::SelTrans::_updateHandles()
+{
+    for (auto & knot : knots)
+        knot->hide();
+
+    if ( !_show_handles || _empty ) {
+        _desktop->selection->setAnchor(0.0, 0.0, false);
+        return;
+    }
+
+    if (!_center_is_set) {
+        _center = _desktop->selection->center();
+        _center_is_set = true;
+    }
+
+    if ( _state == STATE_SCALE ) {
+        _showHandles(HANDLE_STRETCH);
+        _showHandles(HANDLE_SCALE);
+    } else if(_state == STATE_ALIGN) {
+       _showHandles(HANDLE_SIDE_ALIGN);
+       _showHandles(HANDLE_CORNER_ALIGN);
+       _showHandles(HANDLE_CENTER_ALIGN);
+    } else {
+        _showHandles(HANDLE_SKEW);
+        _showHandles(HANDLE_ROTATE);
+        _showHandles(HANDLE_CENTER);
+    }
+
+    // Set anchor point, 0.0 is always set if nothing is selected (top/left).
+    bool set = false;
+    for (int i = 0; i < NUMHANDS; i++) {
+        if (knots[i]->is_selected()) {
+            double anchor_x, anchor_y = 0.0;
+            if (hands[i].type == HANDLE_CENTER) {
+                anchor_x = (_center->x() - _bbox->min()[Geom::X]) / _bbox->dimensions()[Geom::X];
+                anchor_y = (_center->y() - _bbox->min()[Geom::Y]) / _bbox->dimensions()[Geom::Y];
+            } else {
+                anchor_x = hands[i].x;
+                anchor_y = (hands[i].y - 0.5) * (-_desktop->yaxisdir()) + 0.5;
+            }
+            set = true;
+            _desktop->selection->setAnchor(anchor_x, anchor_y);
+        }
+    }
+    if (!set)
+        _desktop->selection->setAnchor(0.0, 0.0, false);
+}
+
+void Inkscape::SelTrans::_updateVolatileState()
+{
+    Inkscape::Selection *selection = _desktop->getSelection();
+    _empty = selection->isEmpty();
+
+    if (_empty) {
+        return;
+    }
+
+    //Update the bboxes
+    _bbox = selection->bounds(_snap_bbox_type);
+    _stroked_bbox = selection->strokedBounds();
+
+    if (!_bbox) {
+        _empty = true;
+        return;
+    }
+
+    std::vector<SPItem *> vec(selection->items().begin(), selection->items().end());
+    _strokewidth = stroke_average_width(vec);
+}
+
+void Inkscape::SelTrans::_showHandles(SPSelTransType type)
+{
+    // shouldn't have nullary bbox, but knots
+    g_assert(_bbox);
+
+    auto const y_dir = _desktop->yaxisdir();
+
+    for (int i = 0; i < NUMHANDS; i++) {
+        if (hands[i].type != type)
+            continue;
+
+        // Position knots to scale the selection bbox
+        Geom::Point const bpos(hands[i].x, (hands[i].y - 0.5) * (-y_dir) + 0.5);
+        Geom::Point p(_bbox->min() + (_bbox->dimensions() * Geom::Scale(bpos)));
+        knots[i]->moveto(p);
+        knots[i]->show();
+
+        // This controls the center handle's position, because the default can
+        // be moved and needs to be remembered.
+        if( type == HANDLE_CENTER && _center )
+            knots[i]->moveto(*_center);
+    }
+}
+
+void Inkscape::SelTrans::_makeHandles()
+{
+    for (int i = 0; i < NUMHANDS; i++) {
+        using Inkscape::Modifiers::Type;
+        using Inkscape::Modifiers::Modifier;
+
+        auto confine_mod = Modifier::get(Type::TRANS_CONFINE)->get_label();
+        auto center_mod = Modifier::get(Type::TRANS_OFF_CENTER)->get_label();
+        auto increment_mod = Modifier::get(Type::TRANS_INCREMENT)->get_label();
+
+        switch (hands[i].type) {
+            case HANDLE_STRETCH:
+            case HANDLE_SCALE:
+            {
+                auto tip = Glib::ustring::compose(_("<b>Scale</b> selection; with <b>%1</b> to scale uniformly; with <b>%2</b> to scale around rotation center"), confine_mod, center_mod);
+                knots[i] = new SPKnot(_desktop, tip.c_str(), CANVAS_ITEM_CTRL_TYPE_ADJ_HANDLE, "SelTrans");
+                break;
+            }
+            case HANDLE_SKEW:
+            {
+                auto tip = Glib::ustring::compose(_("<b>Skew</b> selection; with <b>%1</b> to snap angle; with <b>%2</b> to skew around the opposite side"), increment_mod, center_mod);
+                knots[i] = new SPKnot(_desktop, tip.c_str(), CANVAS_ITEM_CTRL_TYPE_ADJ_SKEW, "SelTrans");
+                break;
+            }
+            case HANDLE_ROTATE:
+            {
+                auto tip = Glib::ustring::compose(_("<b>Rotate</b> selection; with <b>%1</b> to snap angle; with <b>%2</b> to rotate around the opposite corner"), increment_mod, center_mod);
+                knots[i] = new SPKnot(_desktop, tip.c_str(), CANVAS_ITEM_CTRL_TYPE_ADJ_ROTATE, "SelTrans");
+                break;
+            }
+            case HANDLE_CENTER:
+            {
+                auto tip = Glib::ustring::compose(_("<b>Center</b> of transformation: drag to reposition; scaling, rotation and skew with %1 also uses this center"), center_mod);
+                knots[i] = new SPKnot(_desktop, tip.c_str(), CANVAS_ITEM_CTRL_TYPE_ADJ_CENTER, "SelTrans");
+                break;
+            }
+            case HANDLE_SIDE_ALIGN:
+                knots[i] = new SPKnot(_desktop, 
+                    _("<b>Align</b> objects to the side clicked; <b>Shift</b> click to invert side; <b>Ctrl</b> to group whole selection."),
+                    CANVAS_ITEM_CTRL_TYPE_ADJ_SALIGN, "SelTrans");
+                break;
+            case HANDLE_CORNER_ALIGN:
+                knots[i] = new SPKnot(_desktop,
+                    _("<b>Align</b> objects to the corner clicked; <b>Shift</b> click to invert side; <b>Ctrl</b> to group whole selection."),
+                    CANVAS_ITEM_CTRL_TYPE_ADJ_CALIGN, "SelTrans");
+                break;
+            case HANDLE_CENTER_ALIGN:
+                knots[i] = new SPKnot(_desktop,
+                    _("<b>Align</b> objects to center; <b>Shift</b> click to center vertically instead of horizontally."),
+                    CANVAS_ITEM_CTRL_TYPE_ADJ_MALIGN, "SelTrans");
+                break;
+            default:
+                knots[i] = new SPKnot(_desktop, "", CANVAS_ITEM_CTRL_TYPE_ADJ_HANDLE, "SelTrans");
+        }
+
+        knots[i]->setAnchor(hands[i].anchor);
+        knots[i]->setMode(CANVAS_ITEM_CTRL_MODE_DESATURATED_XOR);
+        knots[i]->setFill(DEF_COLOR[0], DEF_COLOR[1], DEF_COLOR[1], DEF_COLOR[2]);
+        knots[i]->setStroke(DEF_COLOR[3], DEF_COLOR[4], DEF_COLOR[4], DEF_COLOR[4]);
+
+        knots[i]->updateCtrl();
+
+        knots[i]->request_signal.connect(sigc::bind(sigc::ptr_fun(sp_sel_trans_handle_request), &hands[i]));
+        knots[i]->moved_signal.connect(sigc::bind(sigc::ptr_fun(sp_sel_trans_handle_new_event), &hands[i]));
+        knots[i]->grabbed_signal.connect(sigc::bind(sigc::ptr_fun(sp_sel_trans_handle_grab), &hands[i]));
+        knots[i]->ungrabbed_signal.connect(sigc::bind(sigc::ptr_fun(sp_sel_trans_handle_ungrab), &hands[i]));
+        knots[i]->click_signal.connect(sigc::bind(sigc::ptr_fun(sp_sel_trans_handle_click), &hands[i]));
+        knots[i]->event_signal.connect(sigc::bind(sigc::ptr_fun(sp_sel_trans_handle_event), &hands[i]));
+    }
+}
+
+static void sp_sel_trans_handle_grab(SPKnot *knot, guint state, SPSelTransHandle const* data)
+{
+    SP_SELECT_CONTEXT(knot->desktop->event_context)->_seltrans->handleGrab(
+        knot, state, *(SPSelTransHandle const *) data
+        );
+}
+
+static void sp_sel_trans_handle_ungrab(SPKnot *knot, guint /*state*/, SPSelTransHandle const* /*data*/)
+{
+    SP_SELECT_CONTEXT(knot->desktop->event_context)->_seltrans->ungrab();
+}
+
+static void sp_sel_trans_handle_new_event(SPKnot *knot, Geom::Point const& position, guint state, SPSelTransHandle const *data)
+{
+    Geom::Point pos = position;
+
+    SP_SELECT_CONTEXT(knot->desktop->event_context)->_seltrans->handleNewEvent(
+        knot, &pos, state, *(SPSelTransHandle const *) data
+        );
+}
+
+static gboolean sp_sel_trans_handle_request(SPKnot *knot, Geom::Point *position, guint state, SPSelTransHandle const *data)
+{
+    return SP_SELECT_CONTEXT(knot->desktop->event_context)->_seltrans->handleRequest(
+        knot, position, state, *(SPSelTransHandle const *) data
+        );
+}
+
+static void sp_sel_trans_handle_click(SPKnot *knot, guint state, SPSelTransHandle const* data)
+{
+    SP_SELECT_CONTEXT(knot->desktop->event_context)->_seltrans->handleClick(
+        knot, state, *(SPSelTransHandle const *) data
+        );
+}
+
+void Inkscape::SelTrans::handleClick(SPKnot *knot, guint state, SPSelTransHandle const &handle)
+{
+    switch (handle.type) {
+        case HANDLE_CENTER:
+            if (state & GDK_SHIFT_MASK) {
+                // Unset the  center position for all selected items
+            	auto items = _desktop->selection->items();
+                for (auto iter=items.begin();iter!=items.end(); ++iter) {
+                    SPItem *it = *iter;
+                    it->unsetCenter();
+                    it->updateRepr();
+                    _center_is_set = false;  // center has changed
+                    _updateHandles();
+                }
+                DocumentUndo::done(_desktop->getDocument(), _("Reset center"), INKSCAPE_ICON("tool-pointer"));
+            }
+            // no break, continue.
+        case HANDLE_STRETCH:
+        case HANDLE_SCALE:
+            {
+                bool was_selected = knot->is_selected();
+                for (auto & child_knot : knots) {
+                    child_knot->selectKnot(false);
+                }
+                if (!was_selected) {
+                    knot->selectKnot(true);
+                }
+                _updateHandles();
+            }
+            break;
+        case HANDLE_SIDE_ALIGN:
+        case HANDLE_CORNER_ALIGN:
+        case HANDLE_CENTER_ALIGN:
+            align(state, handle);
+        default:
+            break;
+    }
+}
+
+void Inkscape::SelTrans::handleGrab(SPKnot *knot, guint /*state*/, SPSelTransHandle const &handle)
+{
+    grab(knot->position(), handle.x, handle.y, FALSE, FALSE);
+
+    // Forcing handles visibility must be done after grab() to be effective
+    switch (handle.type) {
+        case HANDLE_CENTER:
+            _grip->set_shape(Inkscape::CANVAS_ITEM_CTRL_SHAPE_PLUS);
+
+            _norm->hide();
+            _grip->show();
+            break;
+        default:
+            _grip->set_shape(Inkscape::CANVAS_ITEM_CTRL_SHAPE_CROSS);
+
+            _norm->show();
+            _grip->show();
+            break;
+    }
+}
+
+
+void Inkscape::SelTrans::handleNewEvent(SPKnot *knot, Geom::Point *position, guint state, SPSelTransHandle const &handle)
+{
+    if (!knot->is_grabbed()) {
+        return;
+    }
+
+    // in case items have been unhooked from the document, don't
+    // try to continue processing events for them.
+    for (auto & _item : _items) {
+        if ( !_item->document ) {
+            return;
+        }
+    }
+    switch (handle.type) {
+        case HANDLE_SCALE:
+            scale(*position, state);
+            break;
+        case HANDLE_STRETCH:
+            stretch(handle, *position, state);
+            break;
+        case HANDLE_SKEW:
+            skew(handle, *position, state);
+            break;
+        case HANDLE_ROTATE:
+            rotate(*position, state);
+            break;
+        case HANDLE_CENTER:
+            setCenter(*position);
+            break;
+        case HANDLE_SIDE_ALIGN:
+        case HANDLE_CORNER_ALIGN:
+        case HANDLE_CENTER_ALIGN:
+            break;
+    }
+}
+
+
+gboolean Inkscape::SelTrans::handleRequest(SPKnot *knot, Geom::Point *position, guint state, SPSelTransHandle const &handle)
+{
+    if (!knot->is_grabbed()) {
+        return TRUE;
+    }
+
+    // When holding shift while rotating or skewing, the transformation will be
+    // relative to the point opposite of the handle; otherwise it will be relative
+    // to the center as set for the selection
+    auto off_center = Modifiers::Modifier::get(Modifiers::Type::TRANS_OFF_CENTER)->active(state);
+    if ((!off_center == !(_state == STATE_ROTATE)) && (handle.type != HANDLE_CENTER)) {
+        _origin = _opposite;
+        _origin_for_bboxpoints = _opposite_for_bboxpoints;
+        _origin_for_specpoints = _opposite_for_specpoints;
+    } else if (_center) {
+        _origin = *_center;
+        _origin_for_bboxpoints = *_center;
+        _origin_for_specpoints = *_center;
+    } else {
+        // FIXME
+        return TRUE;
+    }
+    if (request(handle, *position, state)) {
+        knot->setPosition(*position, state);
+        _grip->set_position(*position);
+        if (handle.type == HANDLE_CENTER) {
+            _norm->set_position(*position);
+        } else {
+            _norm->set_position(_origin);
+        }
+    }
+
+    return TRUE;
+}
+
+
+void Inkscape::SelTrans::_selChanged(Inkscape::Selection */*selection*/)
+{
+    if (!_grabbed) {
+        Inkscape::Preferences *prefs = Inkscape::Preferences::get();
+        // reread in case it changed on the fly:
+        int prefs_bbox = prefs->getBool("/tools/bounding_box");
+         _snap_bbox_type = !prefs_bbox ?
+            SPItem::VISUAL_BBOX : SPItem::GEOMETRIC_BBOX;
+
+        _updateVolatileState();
+        _current_relative_affine.setIdentity();
+        _center_is_set = false; // center(s) may have changed
+        _updateHandles();
+    }
+}
+
+void Inkscape::SelTrans::_selModified(Inkscape::Selection */*selection*/, guint /*flags*/)
+{
+    if (!_grabbed) {
+        _updateVolatileState();
+        _current_relative_affine.setIdentity();
+
+        // reset internal flag
+        _changed = false;
+
+        _center_is_set = false;  // center(s) may have changed
+
+        _updateHandles();
+    }
+}
+
+void Inkscape::SelTrans::_boundingBoxPrefsChanged(int prefs_bbox)
+{
+    _snap_bbox_type = !prefs_bbox ?
+        SPItem::VISUAL_BBOX : SPItem::GEOMETRIC_BBOX;
+
+    _updateVolatileState();
+    _updateHandles();
+}
+
+/*
+ * handlers for handle move-request
+ */
+
+/** Returns -1 or 1 according to the sign of x.  Returns 1 for 0 and NaN. */
+static double sign(double const x)
+{
+    return ( x < 0
+             ? -1
+             : 1 );
+}
+
+gboolean Inkscape::SelTrans::scaleRequest(Geom::Point &pt, guint state)
+{
+
+    // Calculate the scale factors, which can be either visual or geometric
+    // depending on which type of bbox is currently being used (see preferences -> selector tool)
+    Geom::Scale default_scale = calcScaleFactors(_point, pt, _origin);
+
+    // Find the scale factors for the geometric bbox
+    Geom::Point pt_geom = _getGeomHandlePos(pt);
+    Geom::Scale geom_scale = calcScaleFactors(_point_geom, pt_geom, _origin_for_specpoints);
+
+    _absolute_affine = Geom::identity(); //Initialize the scaler
+
+    auto increments = Modifiers::Modifier::get(Modifiers::Type::TRANS_INCREMENT)->active(state);
+    if (increments) { // scale by an integer multiplier/divider
+        // We're scaling either the visual or the geometric bbox here (see the comment above)
+        for ( unsigned int i = 0 ; i < 2 ; i++ ) {
+            if (fabs(default_scale[i]) > 1) {
+                default_scale[i] = round(default_scale[i]);
+            } else if (default_scale[i] != 0) {
+                default_scale[i] = 1/round(1/(MIN(default_scale[i], 10)));
+            }
+        }
+        // Update the knot position
+        pt = _calcAbsAffineDefault(default_scale);
+        // When scaling by an integer, snapping is not needed
+    } else {
+        // In all other cases we should try to snap now
+        Inkscape::PureScale  *bb, *sn;
+
+        auto confine = Modifiers::Modifier::get(Modifiers::Type::TRANS_CONFINE)->active(state);
+        if (confine || _desktop->isToolboxButtonActive ("lock")) {
+            // Scale is locked to a 1:1 aspect ratio, so that s[X] must be made to equal s[Y].
+            //
+            // The aspect-ratio must be locked before snapping
+            if (fabs(default_scale[Geom::X]) > fabs(default_scale[Geom::Y])) {
+                default_scale[Geom::X] = fabs(default_scale[Geom::Y]) * sign(default_scale[Geom::X]);
+                geom_scale[Geom::X] = fabs(geom_scale[Geom::Y]) * sign(geom_scale[Geom::X]);
+            } else {
+                default_scale[Geom::Y] = fabs(default_scale[Geom::X]) * sign(default_scale[Geom::Y]);
+                geom_scale[Geom::Y] = fabs(geom_scale[Geom::X]) * sign(geom_scale[Geom::Y]);
+            }
+
+            // Snap along a suitable constraint vector from the origin.
+
+            bb = new Inkscape::PureScaleConstrained(default_scale, _origin_for_bboxpoints);
+            sn = new Inkscape::PureScaleConstrained(geom_scale, _origin_for_specpoints);
+        } else {
+            /* Scale aspect ratio is unlocked */
+            bb = new Inkscape::PureScale(default_scale, _origin_for_bboxpoints, false);
+            sn = new Inkscape::PureScale(geom_scale, _origin_for_specpoints, false);
+        }
+        SnapManager &m = _desktop->namedview->snap_manager;
+        m.setup(_desktop, false, _objects_const);
+        m.snapTransformed(_bbox_points, _point, (*bb));
+        m.snapTransformed(_snap_points, _point, (*sn));
+        m.unSetup();
+
+        // These lines below are duplicated in stretchRequest
+        //TODO: Eliminate this code duplication
+        if (bb->best_snapped_point.getSnapped() || sn->best_snapped_point.getSnapped()) {
+            if (bb->best_snapped_point.getSnapped() && !bb->best_snapped_point.isOtherSnapBetter(sn->best_snapped_point, false)) {
+                // We snapped the bbox (which is either visual or geometric)
+                _desktop->snapindicator->set_new_snaptarget(bb->best_snapped_point);
+                default_scale = bb->getScaleSnapped();
+                // Calculate the new transformation and update the handle position
+                pt = _calcAbsAffineDefault(default_scale);
+            } else if (sn->best_snapped_point.getSnapped()) {
+                _desktop->snapindicator->set_new_snaptarget(sn->best_snapped_point);
+                // We snapped the special points (e.g. nodes), which are not at the visual bbox
+                // The handle location however (pt) might however be at the visual bbox, so we
+                // will have to calculate pt taking the stroke width into account
+                geom_scale = sn->getScaleSnapped();
+                pt = _calcAbsAffineGeom(geom_scale);
+            }
+        } else {
+            // We didn't snap at all! Don't update the handle position, just calculate the new transformation
+            _calcAbsAffineDefault(default_scale);
+            _desktop->snapindicator->remove_snaptarget();
+        }
+
+        delete bb;
+        delete sn;
+    }
+
+    /* Status text */
+    auto confine_mod = Modifiers::Modifier::get(Modifiers::Type::TRANS_CONFINE)->get_label();
+    _message_context.setF(Inkscape::IMMEDIATE_MESSAGE,
+                          _("<b>Scale</b>: %0.2f%% x %0.2f%%; with <b>%s</b> to lock ratio"),
+                          100 * _absolute_affine[0], 100 * _absolute_affine[3], confine_mod.c_str());
+
+    return TRUE;
+}
+
+gboolean Inkscape::SelTrans::stretchRequest(SPSelTransHandle const &handle, Geom::Point &pt, guint state)
+{
+    Geom::Dim2 axis, perp;
+    switch (handle.cursor) {
+        case GDK_TOP_SIDE:
+        case GDK_BOTTOM_SIDE:
+            axis = Geom::Y;
+            perp = Geom::X;
+            break;
+        case GDK_LEFT_SIDE:
+        case GDK_RIGHT_SIDE:
+            axis = Geom::X;
+            perp = Geom::Y;
+            break;
+        default:
+            g_assert_not_reached();
+            return TRUE;
+    };
+
+    // Calculate the scale factors, which can be either visual or geometric
+    // depending on which type of bbox is currently being used (see preferences -> selector tool)
+    Geom::Scale default_scale = calcScaleFactors(_point, pt, _origin);
+    default_scale[perp] = 1;
+
+    // Find the scale factors for the geometric bbox
+    Geom::Point pt_geom = _getGeomHandlePos(pt);
+    Geom::Scale geom_scale = calcScaleFactors(_point_geom, pt_geom, _origin_for_specpoints);
+    geom_scale[perp] = 1;
+
+    _absolute_affine = Geom::identity(); //Initialize the scaler
+
+    auto increments = Modifiers::Modifier::get(Modifiers::Type::TRANS_INCREMENT)->active(state);
+    if (increments) { // stretch by an integer multiplier/divider
+        if (fabs(default_scale[axis]) > 1) {
+            default_scale[axis] = round(default_scale[axis]);
+        } else if (default_scale[axis] != 0) {
+            default_scale[axis] = 1/round(1/(MIN(default_scale[axis], 10)));
+        }
+        // Calculate the new transformation and update the handle position
+        pt = _calcAbsAffineDefault(default_scale);
+        // When stretching by an integer, snapping is not needed
+    } else {
+        // In all other cases we should try to snap now
+
+        SnapManager &m = _desktop->namedview->snap_manager;
+        m.setup(_desktop, false, _objects_const);
+
+        auto confine = Modifiers::Modifier::get(Modifiers::Type::TRANS_CONFINE)->active(state);
+        Inkscape::PureStretchConstrained bb = Inkscape::PureStretchConstrained(Geom::Coord(default_scale[axis]), _origin_for_bboxpoints, Geom::Dim2(axis), confine);
+        Inkscape::PureStretchConstrained sn = Inkscape::PureStretchConstrained(Geom::Coord(geom_scale[axis]), _origin_for_specpoints, Geom::Dim2(axis), confine);
+
+        m.snapTransformed(_bbox_points, _point, bb);
+        m.snapTransformed(_snap_points, _point, sn);
+        m.unSetup();
+
+        if (bb.best_snapped_point.getSnapped()) {
+            // We snapped the bbox (which is either visual or geometric)
+            default_scale[axis] = bb.getMagnitude();
+        }
+
+        if (sn.best_snapped_point.getSnapped()) {
+            geom_scale[axis] = sn.getMagnitude();
+        }
+
+        if (confine) {
+            // on scale_confine, apply symmetrical scaling instead of stretching
+            // Preserve aspect ratio, but never flip in the dimension not being edited (by using fabs())
+            default_scale[perp] = fabs(default_scale[axis]);
+            geom_scale[perp] = fabs(geom_scale[axis]);
+        }
+
+        // These lines below are duplicated in scaleRequest
+        if (bb.best_snapped_point.getSnapped() || sn.best_snapped_point.getSnapped()) {
+            if (bb.best_snapped_point.getSnapped() && !bb.best_snapped_point.isOtherSnapBetter(sn.best_snapped_point, false)) {
+                // We snapped the bbox (which is either visual or geometric)
+                _desktop->snapindicator->set_new_snaptarget(bb.best_snapped_point);
+                default_scale = bb.getStretchSnapped();
+                // Calculate the new transformation and update the handle position
+                pt = _calcAbsAffineDefault(default_scale);
+            } else if (sn.best_snapped_point.getSnapped()) {
+                _desktop->snapindicator->set_new_snaptarget(sn.best_snapped_point);
+                // We snapped the special points (e.g. nodes), which are not at the visual bbox
+                // The handle location however (pt) might however be at the visual bbox, so we
+                // will have to calculate pt taking the stroke width into account
+                geom_scale = sn.getStretchSnapped();
+                pt = _calcAbsAffineGeom(geom_scale);
+            }
+        } else {
+            // We didn't snap at all! Don't update the handle position, just calculate the new transformation
+            _calcAbsAffineDefault(default_scale);
+            _desktop->snapindicator->remove_snaptarget();
+        }
+    }
+
+    // status text
+    auto confine_mod = Modifiers::Modifier::get(Modifiers::Type::TRANS_CONFINE)->get_label();
+    _message_context.setF(Inkscape::IMMEDIATE_MESSAGE,
+                          _("<b>Scale</b>: %0.2f%% x %0.2f%%; with <b>%s</b> to lock ratio"),
+                          100 * _absolute_affine[0], 100 * _absolute_affine[3], confine_mod.c_str());
+
+    return TRUE;
+}
+
+gboolean Inkscape::SelTrans::request(SPSelTransHandle const &handle, Geom::Point &pt, guint state)
+{
+    // These _should_ be in the handstype somewhere instead
+    switch (handle.type) {
+        case HANDLE_SCALE:
+            return scaleRequest(pt, state);
+        case HANDLE_STRETCH:
+            return stretchRequest(handle, pt, state);
+        case HANDLE_SKEW:
+            return skewRequest(handle, pt, state);
+        case HANDLE_ROTATE:
+            return rotateRequest(pt, state);
+        case HANDLE_CENTER:
+            return centerRequest(pt, state);
+        case HANDLE_SIDE_ALIGN:
+        case HANDLE_CORNER_ALIGN:
+        case HANDLE_CENTER_ALIGN:
+            break; // Do nothing, no dragging
+    }
+    return FALSE;
+}
+
+gboolean Inkscape::SelTrans::skewRequest(SPSelTransHandle const &handle, Geom::Point &pt, guint state)
+{
+    /* When skewing (or rotating):
+     * 1) the stroke width will not change. This makes life much easier because we don't have to
+     *    account for that (like for scaling or stretching). As a consequence, all points will
+     *    have the same origin for the transformation and for the snapping.
+     * 2) When holding shift, the transformation will be relative to the point opposite of
+     *    the handle; otherwise it will be relative to the center as set for the selection
+     */
+
+    Geom::Dim2 dim_a;
+    Geom::Dim2 dim_b;
+
+    switch (handle.cursor) {
+        case GDK_SB_H_DOUBLE_ARROW:
+            dim_a = Geom::Y;
+            dim_b = Geom::X;
+            break;
+        case GDK_SB_V_DOUBLE_ARROW:
+            dim_a = Geom::X;
+            dim_b = Geom::Y;
+            break;
+        default:
+            g_assert_not_reached();
+            abort();
+            break;
+    }
+
+    // _point and _origin are noisy, ranging from 1 to 1e-9 or even smaller; this is due to the
+    // limited SVG output precision, which can be arbitrarily set in the preferences
+    Geom::Point const initial_delta = _point - _origin;
+
+    // The handle and the origin shouldn't be too close to each other; let's check for that!
+    // Due to the limited resolution though (see above), we'd better use a relative error here
+    if (_bbox) {
+        Geom::Coord d = (*_bbox).dimensions()[dim_a];
+        if (fabs(initial_delta[dim_a]/d) < 1e-4) {
+            return false;
+        }
+    }
+
+    // Calculate the scale factors, which can be either visual or geometric
+    // depending on which type of bbox is currently being used (see preferences -> selector tool)
+    Geom::Scale scale = calcScaleFactors(_point, pt, _origin, false);
+    Geom::Scale skew = calcScaleFactors(_point, pt, _origin, true);
+    scale[dim_b] = 1;
+    skew[dim_b] = 1;
+
+    if (fabs(scale[dim_a]) < 1) {
+        // Prevent shrinking of the selected object, while allowing mirroring
+        scale[dim_a] = sign(scale[dim_a]);
+    } else {
+        // Allow expanding of the selected object by integer multiples
+        scale[dim_a] = floor(scale[dim_a] + 0.5);
+    }
+
+    double radians = atan(skew[dim_a] / scale[dim_a]);
+
+    auto increments = Modifiers::Modifier::get(Modifiers::Type::TRANS_INCREMENT)->active(state);
+    if (increments) {
+        Inkscape::Preferences *prefs = Inkscape::Preferences::get();
+        // Snap to defined angle increments
+        int snaps = prefs->getInt("/options/rotationsnapsperpi/value", 12);
+        if (snaps) {
+            double sections = floor(radians * snaps / M_PI + .5);
+            if (fabs(sections) >= snaps / 2) {
+                sections = sign(sections) * (snaps / 2 - 1);
+            }
+            radians = (M_PI / snaps) * sections;
+        }
+        skew[dim_a] = tan(radians) * scale[dim_a];
+    } else {
+        // Snap to objects, grids, guides
+
+        SnapManager &m = _desktop->namedview->snap_manager;
+        m.setup(_desktop, false, _objects_const);
+
+        // When skewing, we cannot snap the corners of the bounding box, see the comment in PureSkewConstrained for details
+        Inkscape::PureSkewConstrained sn = Inkscape::PureSkewConstrained(skew[dim_a], scale[dim_a], _origin, Geom::Dim2(dim_b));
+        m.snapTransformed(_snap_points, _point, sn);
+
+        if (sn.best_snapped_point.getSnapped()) {
+            // We snapped something, so change the skew to reflect it
+            skew[dim_a] = sn.getSkewSnapped();
+             _desktop->snapindicator->set_new_snaptarget(sn.best_snapped_point);
+        } else {
+            _desktop->snapindicator->remove_snaptarget();
+        }
+
+        m.unSetup();
+    }
+
+    // Update the handle position
+    pt[dim_b] = initial_delta[dim_a] * skew[dim_a] + _point[dim_b];
+    pt[dim_a] = initial_delta[dim_a] * scale[dim_a] + _origin[dim_a];
+
+    // Calculate the relative affine
+    _relative_affine = Geom::identity();
+    _relative_affine[2*dim_a + dim_a] = (pt[dim_a] - _origin[dim_a]) / initial_delta[dim_a];
+    _relative_affine[2*dim_a + (dim_b)] = (pt[dim_b] - _point[dim_b]) / initial_delta[dim_a];
+    _relative_affine[2*(dim_b) + (dim_a)] = 0;
+    _relative_affine[2*(dim_b) + (dim_b)] = 1;
+
+    for (int i = 0; i < 2; i++) {
+        if (fabs(_relative_affine[3*i]) < 1e-15) {
+            _relative_affine[3*i] = 1e-15;
+        }
+    }
+
+    // Update the status text
+    auto increment_mod = Modifiers::Modifier::get(Modifiers::Type::TRANS_INCREMENT)->get_label();
+    double degrees = mod360symm(Geom::deg_from_rad(radians));
+    _message_context.setF(Inkscape::IMMEDIATE_MESSAGE,
+                          // TRANSLATORS: don't modify the first ";"
+                          // (it will NOT be displayed as ";" - only the second one will be)
+                          _("<b>Skew</b>: %0.2f&#176;; with <b>%s</b> to snap angle"),
+                          degrees, increment_mod.c_str());
+
+    return TRUE;
+}
+
+gboolean Inkscape::SelTrans::rotateRequest(Geom::Point &pt, guint state)
+{
+    /* When rotating (or skewing):
+     * 1) the stroke width will not change. This makes life much easier because we don't have to
+     *    account for that (like for scaling or stretching). As a consequence, all points will
+     *    have the same origin for the transformation and for the snapping.
+     * 2) When holding shift, the transformation will be relative to the point opposite of
+     *    the handle; otherwise it will be relative to the center as set for the selection
+     */
+
+    Inkscape::Preferences *prefs = Inkscape::Preferences::get();
+    int snaps = prefs->getInt("/options/rotationsnapsperpi/value", 12);
+
+    // rotate affine in rotate
+    Geom::Point const d1 = _point - _origin;
+    Geom::Point const d2 = pt     - _origin;
+
+    Geom::Coord const h1 = Geom::L2(d1); // initial radius
+    if (h1 < 1e-15) return FALSE;
+    Geom::Point q1 = d1 / h1; // normalized initial vector to handle
+    Geom::Coord const h2 = Geom::L2(d2); // new radius
+    if (fabs(h2) < 1e-15) return FALSE;
+    Geom::Point q2 = d2 / h2; // normalized new vector to handle
+
+    Geom::Rotate r1(q1);
+    Geom::Rotate r2(q2);
+
+    double radians = atan2(Geom::dot(Geom::rot90(d1), d2), Geom::dot(d1, d2));;
+    auto increments = Modifiers::Modifier::get(Modifiers::Type::TRANS_INCREMENT)->active(state);
+    auto confine = Modifiers::Modifier::get(Modifiers::Type::TRANS_CONFINE)->active(state);
+    // Either key will now snap the rotation to specific points
+    if (increments || confine) {
+        // Snap to defined angle increments
+        double cos_t = Geom::dot(q1, q2);
+        double sin_t = Geom::dot(Geom::rot90(q1), q2);
+        radians = atan2(sin_t, cos_t);
+        if (snaps) {
+            radians = ( M_PI / snaps ) * floor( radians * snaps / M_PI + .5 );
+        }
+        r1 = Geom::Rotate(0); //q1 = Geom::Point(1, 0);
+        r2 = Geom::Rotate(radians); //q2 = Geom::Point(cos(radians), sin(radians));
+    } else {
+        SnapManager &m = _desktop->namedview->snap_manager;
+        m.setup(_desktop, false, _objects_const);
+        // When rotating, we cannot snap the corners of the bounding box, see the comment in "constrainedSnapRotate" for details
+        Inkscape::PureRotateConstrained sn = Inkscape::PureRotateConstrained(radians, _origin);
+        m.snapTransformed(_snap_points, _point, sn);
+        m.unSetup();
+
+        if (sn.best_snapped_point.getSnapped()) {
+            _desktop->snapindicator->set_new_snaptarget(sn.best_snapped_point);
+            // We snapped something, so change the rotation to reflect it
+            radians = sn.getAngleSnapped();
+            r1 = Geom::Rotate(0);
+            r2 = Geom::Rotate(radians);
+        } else {
+            _desktop->snapindicator->remove_snaptarget();
+        }
+
+    }
+
+
+    // Calculate the relative affine
+    _relative_affine = r2 * r1.inverse();
+
+    // Update the handle position
+    pt = _point * Geom::Translate(-_origin) * _relative_affine * Geom::Translate(_origin);
+
+    // Update the status text
+    auto increment_mod = Modifiers::Modifier::get(Modifiers::Type::TRANS_INCREMENT)->get_label();
+    double degrees = mod360symm(Geom::deg_from_rad(radians));
+    _message_context.setF(Inkscape::IMMEDIATE_MESSAGE,
+                          // TRANSLATORS: don't modify the first ";"
+                          // (it will NOT be displayed as ";" - only the second one will be)
+                          _("<b>Rotate</b>: %0.2f&#176;; with <b>%s</b> to snap angle"), degrees, increment_mod.c_str());
+
+    return TRUE;
+}
+
+// Move the item's transformation center
+gboolean Inkscape::SelTrans::centerRequest(Geom::Point &pt, guint state)
+{
+    // When dragging the transformation center while multiple items have been selected, then those
+    // items will share a single center. While dragging that single center, it should never snap to the
+    // centers of any of the selected objects. Therefore we will have to pass the list of selected items
+    // to the snapper, to avoid self-snapping of the rotation center
+    std::vector<SPItem *> items(_selection->items().begin(), _selection->items().end());
+    SnapManager &m = _desktop->namedview->snap_manager;
+    m.setup(_desktop);
+    m.setRotationCenterSource(items);
+
+    auto no_snap = Modifiers::Modifier::get(Modifiers::Type::MOVE_SNAPPING)->active(state);
+    auto confine = Modifiers::Modifier::get(Modifiers::Type::MOVE_CONFINE)->active(state);
+    if (confine) {
+        std::vector<Inkscape::Snapper::SnapConstraint> constraints;
+        constraints.emplace_back(_point, Geom::Point(1, 0));
+        constraints.emplace_back(_point, Geom::Point(0, 1));
+        Inkscape::SnappedPoint sp = m.multipleConstrainedSnaps(Inkscape::SnapCandidatePoint(pt, Inkscape::SNAPSOURCE_ROTATION_CENTER), constraints, no_snap);
+        pt = sp.getPoint();
+    }
+    else if (!no_snap) {
+        m.freeSnapReturnByRef(pt, Inkscape::SNAPSOURCE_ROTATION_CENTER);
+    }
+
+    m.unSetup();
+
+    // status text
+    Inkscape::Util::Quantity x_q = Inkscape::Util::Quantity(pt[Geom::X], "px");
+    Inkscape::Util::Quantity y_q = Inkscape::Util::Quantity(pt[Geom::Y], "px");
+    Glib::ustring xs(x_q.string(_desktop->namedview->display_units));
+    Glib::ustring ys(y_q.string(_desktop->namedview->display_units));
+    _message_context.setF(Inkscape::NORMAL_MESSAGE, _("Move <b>center</b> to %s, %s"),
+            xs.c_str(), ys.c_str());
+    return TRUE;
+}
+
+void Inkscape::SelTrans::align(guint state, SPSelTransHandle const &handle)
+{
+    Glib::ustring argument;
+    int index = handle.control + ALIGN_OFFSET + ((state & GDK_SHIFT_MASK) ? ALIGN_SHIFT_OFFSET : 0);
+    if (index < 0 || index >= AlignArguments.size()) {
+        std::cerr << "Inkscape::Seltrans::align: index out of bounds! " << index << std::endl;
+        index = 0;
+    }
+
+    auto variant = Glib::Variant<Glib::ustring>::create(AlignArguments[index]);
+    auto app = Gio::Application::get_default();
+    app->activate_action("object-align", variant);
+}
+
+/*
+ * handlers for handle movement
+ *
+ */
+
+
+
+void Inkscape::SelTrans::stretch(SPSelTransHandle const &/*handle*/, Geom::Point &/*pt*/, guint /*state*/)
+{
+    transform(_absolute_affine, Geom::Point(0, 0)); // we have already accounted for origin, so pass 0,0
+}
+
+void Inkscape::SelTrans::scale(Geom::Point &/*pt*/, guint /*state*/)
+{
+    transform(_absolute_affine, Geom::Point(0, 0)); // we have already accounted for origin, so pass 0,0
+}
+
+void Inkscape::SelTrans::skew(SPSelTransHandle const &/*handle*/, Geom::Point &/*pt*/, guint /*state*/)
+{
+    transform(_relative_affine, _origin);
+}
+
+void Inkscape::SelTrans::rotate(Geom::Point &/*pt*/, guint /*state*/)
+{
+    transform(_relative_affine, _origin);
+}
+
+void Inkscape::SelTrans::moveTo(Geom::Point const &xy, guint state)
+{
+    SnapManager &m = _desktop->namedview->snap_manager;
+
+    /* The amount that we've moved by during this drag */
+    Geom::Point dxy = xy - _point;
+
+    auto increments = Modifiers::Modifier::get(Modifiers::Type::MOVE_INCREMENT)->active(state);
+    auto no_snap = Modifiers::Modifier::get(Modifiers::Type::MOVE_SNAPPING)->active(state);
+    auto confine = Modifiers::Modifier::get(Modifiers::Type::MOVE_CONFINE)->active(state);
+
+    if (confine) {
+        if (fabs(dxy[Geom::X]) > fabs(dxy[Geom::Y])) {
+            dxy[Geom::Y] = 0;
+        } else {
+            dxy[Geom::X] = 0;
+        }
+    }
+
+    if (increments) {// Alt pressed means: move only by integer multiples of the grid spacing
+        m.setup(_desktop, true, _objects_const);
+        dxy = m.multipleOfGridPitch(dxy, _point);
+        m.unSetup();
+    } else if (!no_snap) {
+        /* We're snapping to things, possibly with a constraint to horizontal or
+        ** vertical movement.  Obtain a list of possible translations and then
+        ** pick the smallest.
+        */
+
+        m.setup(_desktop, false, _objects_const);
+
+        /* This will be our list of possible translations */
+        std::list<Inkscape::SnappedPoint> s;
+
+        Inkscape::PureTranslate *bb, *sn;
+
+        if (confine) { // constrained movement with snapping
+
+            /* Snap to things, and also constrain to horizontal or vertical movement */
+
+            Geom::Dim2 dim = fabs(dxy[Geom::X]) > fabs(dxy[Geom::Y]) ? Geom::X : Geom::Y;
+            // When doing a constrained translation, all points will move in the same direction, i.e.
+            // either horizontally or vertically. Therefore we only have to specify the direction of
+            // the constraint-line once. The constraint lines are parallel, but might not be colinear.
+            // Therefore we will have to set the point through which the constraint-line runs
+            // individually for each point to be snapped; this will be handled however by snapTransformed()
+            bb = new Inkscape::PureTranslateConstrained(dxy[dim], dim);
+            sn = new Inkscape::PureTranslateConstrained(dxy[dim], dim);
+        } else {
+            /* Snap to things with no constraint */
+            bb = new Inkscape::PureTranslate(dxy);
+            sn = new Inkscape::PureTranslate(dxy);
+        }
+        // Let's leave this timer code here for a while. I'll probably need it in the near future (Diederik van Lierop)
+        /* GTimeVal starttime;
+        GTimeVal endtime;
+        g_get_current_time(&starttime); */
+
+        m.snapTransformed(_bbox_points, _point, (*bb));
+        m.snapTransformed(_snap_points, _point, (*sn));
+        m.unSetup();
+
+        /*g_get_current_time(&endtime);
+        double elapsed = ((((double)endtime.tv_sec - starttime.tv_sec) * G_USEC_PER_SEC + (endtime.tv_usec - starttime.tv_usec))) / 1000.0;
+        std::cout << "Time spent snapping: " << elapsed << std::endl; */
+
+        /* Pick one */
+        Inkscape::SnappedPoint best_snapped_point;
+
+        bool sn_is_best = sn->best_snapped_point.getSnapped();
+        bool bb_is_best = bb->best_snapped_point.getSnapped();
+
+        if (bb_is_best && sn_is_best) {
+            sn_is_best = bb->best_snapped_point.isOtherSnapBetter(sn->best_snapped_point, true);
+            bb_is_best = !sn_is_best;
+        }
+
+        if (sn_is_best) {
+            best_snapped_point = sn->best_snapped_point;
+            dxy = sn->getTranslationSnapped();
+        } else if (bb_is_best) {
+            best_snapped_point = bb->best_snapped_point;
+            dxy = bb->getTranslationSnapped();
+        }
+
+        if (best_snapped_point.getSnapped()) {
+            _desktop->snapindicator->set_new_snaptarget(best_snapped_point);
+        } else {
+            // We didn't snap, so remove any previous snap indicator
+            _desktop->snapindicator->remove_snaptarget();
+            if (confine) {
+                // If we didn't snap, then we should still constrain horizontally or vertically
+                // (When we did snap, then this constraint has already been enforced by
+                // calling constrainedSnapTranslate() above)
+                if (fabs(dxy[Geom::X]) > fabs(dxy[Geom::Y])) {
+                    dxy[Geom::Y] = 0;
+                } else {
+                    dxy[Geom::X] = 0;
+                }
+            }
+        }
+        delete bb;
+        delete sn;
+    }
+
+    Geom::Affine const move((Geom::Translate(dxy)));
+    Geom::Point const norm(0, 0);
+    transform(move, norm);
+
+    // status text
+    auto confine_mod = Modifiers::Modifier::get(Modifiers::Type::MOVE_CONFINE)->get_label();
+    auto no_snap_mod = Modifiers::Modifier::get(Modifiers::Type::MOVE_SNAPPING)->get_label();
+    Inkscape::Util::Quantity x_q = Inkscape::Util::Quantity(dxy[Geom::X], "px");
+    Inkscape::Util::Quantity y_q = Inkscape::Util::Quantity(dxy[Geom::Y], "px");
+    Glib::ustring xs(x_q.string(_desktop->namedview->display_units));
+    Glib::ustring ys(y_q.string(_desktop->namedview->display_units));
+    _message_context.setF(Inkscape::NORMAL_MESSAGE,
+            _("<b>Move</b> by %s, %s; with <b>%s</b> to restrict to horizontal/vertical; with <b>%s</b> to disable snapping"),
+            xs.c_str(), ys.c_str(), confine_mod.c_str(), no_snap_mod.c_str());
+}
+
+// Given a location of a handle at the visual bounding box, find the corresponding location at the
+// geometrical bounding box
+Geom::Point Inkscape::SelTrans::_getGeomHandlePos(Geom::Point const &visual_handle_pos)
+{
+    if ( _snap_bbox_type == SPItem::GEOMETRIC_BBOX) {
+        // When the selector tool is using geometric bboxes, then the handle is already
+        // located at one of the geometric bbox corners
+        return visual_handle_pos;
+    }
+
+    if (!_geometric_bbox) {
+        //_getGeomHandlePos() can only be used after _geometric_bbox has been defined!
+        return visual_handle_pos;
+    }
+
+    // Using the Geom::Rect constructor below ensures that "min() < max()", which is important
+    // because this will also hold for _bbox, and which is required for get_scale_transform_for_stroke()
+    Geom::Rect new_bbox = Geom::Rect(_origin_for_bboxpoints, visual_handle_pos); // new visual bounding box
+    // Please note that the new_bbox might in fact be just a single line, for example when stretching (in
+    // which case the handle and origin will be aligned vertically or horizontally)
+    Geom::Point normalized_handle_pos = (visual_handle_pos - new_bbox.min()) * Geom::Scale(new_bbox.dimensions()).inverse();
+
+    // Calculate the absolute affine while taking into account the scaling of the stroke width
+    Inkscape::Preferences *prefs = Inkscape::Preferences::get();
+    bool transform_stroke = prefs->getBool("/options/transform/stroke", true);
+    bool preserve = prefs->getBool("/options/preservetransform/value", false);
+    Geom::Affine abs_affine = get_scale_transform_for_uniform_stroke (*_bbox, _strokewidth, _strokewidth, transform_stroke, preserve,
+                    new_bbox.min()[Geom::X], new_bbox.min()[Geom::Y], new_bbox.max()[Geom::X], new_bbox.max()[Geom::Y]);
+
+    // Calculate the scaled geometrical bbox
+    Geom::Rect new_geom_bbox = Geom::Rect(_geometric_bbox->min() * abs_affine, _geometric_bbox->max() * abs_affine);
+    // Find the location of the handle on this new geometrical bbox
+    return normalized_handle_pos * Geom::Scale(new_geom_bbox.dimensions()) + new_geom_bbox.min(); //new position of the geometric handle
+}
+
+Geom::Scale Inkscape::calcScaleFactors(Geom::Point const &initial_point, Geom::Point const &new_point, Geom::Point const &origin, bool const skew)
+{
+    // Work out the new scale factors for the bbox
+
+    Geom::Point const initial_delta = initial_point - origin;
+    Geom::Point const new_delta = new_point - origin;
+    Geom::Point const offset = new_point - initial_point;
+    Geom::Scale scale(1, 1);
+
+    for ( unsigned int i = 0 ; i < 2 ; i++ ) {
+        if ( fabs(initial_delta[i]) > 1e-6 ) {
+            if (skew) {
+                scale[i] = offset[1-i] / initial_delta[i];
+            } else {
+                scale[i] = new_delta[i] / initial_delta[i];
+            }
+        }
+    }
+
+    return scale;
+}
+
+// Only for scaling/stretching
+Geom::Point Inkscape::SelTrans::_calcAbsAffineDefault(Geom::Scale const default_scale)
+{
+    Geom::Affine abs_affine = Geom::Translate(-_origin) * Geom::Affine(default_scale) * Geom::Translate(_origin);
+    Geom::Point new_bbox_min = _stroked_bbox->min() * abs_affine;
+    Geom::Point new_bbox_max = _stroked_bbox->max() * abs_affine;
+
+    bool transform_stroke = false;
+    bool preserve = false;
+    gdouble stroke_x = 0;
+    gdouble stroke_y = 0;
+
+    if ( _snap_bbox_type != SPItem::GEOMETRIC_BBOX) {
+        Inkscape::Preferences *prefs = Inkscape::Preferences::get();
+        transform_stroke = prefs->getBool("/options/transform/stroke", true);
+        preserve = prefs->getBool("/options/preservetransform/value", false);
+        stroke_x = _stroked_bbox->width() - _geometric_bbox->width();
+        stroke_y = _stroked_bbox->height() - _geometric_bbox->height();
+    }
+
+    _absolute_affine = get_scale_transform_for_uniform_stroke (*_stroked_bbox, stroke_x, stroke_y, transform_stroke, preserve,
+                    new_bbox_min[Geom::X], new_bbox_min[Geom::Y], new_bbox_max[Geom::X], new_bbox_max[Geom::Y]);
+
+    // return the new handle position
+    return ( _point - _origin ) * default_scale + _origin;
+}
+
+// Only for scaling/stretching
+Geom::Point Inkscape::SelTrans::_calcAbsAffineGeom(Geom::Scale const geom_scale)
+{
+    _relative_affine = Geom::Affine(geom_scale);
+    _absolute_affine = Geom::Translate(-_origin_for_specpoints) * _relative_affine * Geom::Translate(_origin_for_specpoints);
+
+    Inkscape::Preferences *prefs = Inkscape::Preferences::get();
+    bool const transform_stroke = prefs->getBool("/options/transform/stroke", true);
+    if (_geometric_bbox) {
+        Geom::Rect visual_bbox = get_visual_bbox(_geometric_bbox, _absolute_affine, _strokewidth, transform_stroke);
+        // return the new handle position
+        return visual_bbox.min() + visual_bbox.dimensions() * Geom::Scale(_handle_x, _handle_y);
+    }
+
+    // Fall back scenario, in case we don't have a geometric bounding box at hand;
+    // (Due to some bugs related to bounding boxes having at least one zero dimension; For more details
+    // see https://bugs.launchpad.net/inkscape/+bug/318726)
+    g_warning("No geometric bounding box has been calculated; this is a bug that needs fixing!");
+    return _calcAbsAffineDefault(geom_scale); // this is bogus, but we must return _something_
+}
+
+void Inkscape::SelTrans::_keepClosestPointOnly(Geom::Point const &p)
+{
+    SnapManager const &m = _desktop->namedview->snap_manager;
+
+    // If we're not going to snap nodes, then we might just as well get rid of their snappoints right away
+    if (!(m.snapprefs.isTargetSnappable(SNAPTARGET_NODE_CATEGORY, SNAPTARGET_OTHERS_CATEGORY) || m.snapprefs.isAnyDatumSnappable())) {
+        _snap_points.clear();
+    }
+
+    // If we're not going to snap bounding boxes, then we might just as well get rid of their snappoints right away
+    if (!m.snapprefs.isTargetSnappable(SNAPTARGET_BBOX_CATEGORY) && !m.snapprefs.isTargetSnappable(SNAPTARGET_ALIGNMENT_CATEGORY)) {
+        _bbox_points.clear();
+    }
+
+    _all_snap_sources_sorted = _snap_points;
+    _all_snap_sources_sorted.insert(_all_snap_sources_sorted.end(), _bbox_points.begin(), _bbox_points.end());
+
+    // Calculate and store the distance to the reference point for each snap candidate point
+    for(auto & i : _all_snap_sources_sorted) {
+        i.setDistance(Geom::L2(i.getPoint() - p));
+    }
+
+    // Sort them ascending, using the distance calculated above as the single criteria
+    std::sort(_all_snap_sources_sorted.begin(), _all_snap_sources_sorted.end());
+
+    // Now get the closest snap source
+    _snap_points.clear();
+    _bbox_points.clear();
+    if (!_all_snap_sources_sorted.empty()) {
+        _all_snap_sources_iter = _all_snap_sources_sorted.begin();
+        if (_all_snap_sources_sorted.front().getSourceType() & SNAPSOURCE_BBOX_CATEGORY) {
+            _bbox_points.push_back(_all_snap_sources_sorted.front());
+        } else {
+            _snap_points.push_back(_all_snap_sources_sorted.front());
+        }
+    }
+
+}
+// TODO: This code is duplicated in transform-handle-set.cpp; fix this!
+void Inkscape::SelTrans::getNextClosestPoint(bool reverse)
+{
+    Inkscape::Preferences *prefs = Inkscape::Preferences::get();
+    if (prefs->getBool("/options/snapclosestonly/value", false)) {
+        if (!_all_snap_sources_sorted.empty()) {
+            if (reverse) { // Shift-tab will find a closer point
+                if (_all_snap_sources_iter == _all_snap_sources_sorted.begin()) {
+                    _all_snap_sources_iter = _all_snap_sources_sorted.end();
+                }
+                --_all_snap_sources_iter;
+            } else { // Tab will find a point further away
+                ++_all_snap_sources_iter;
+                if (_all_snap_sources_iter == _all_snap_sources_sorted.end()) {
+                    _all_snap_sources_iter = _all_snap_sources_sorted.begin();
+                }
+            }
+
+            _snap_points.clear();
+            _bbox_points.clear();
+
+            if ((*_all_snap_sources_iter).getSourceType() & SNAPSOURCE_BBOX_CATEGORY) {
+                _bbox_points.push_back(*_all_snap_sources_iter);
+            } else {
+                _snap_points.push_back(*_all_snap_sources_iter);
+            }
+
+            // Show the updated snap source now; otherwise it won't be shown until the selection is being moved again
+            SnapManager &m = _desktop->namedview->snap_manager;
+            m.setup(_desktop);
+            m.displaySnapsource(*_all_snap_sources_iter);
+            m.unSetup();
+        }
+    }
+}
+
+/*
+  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 :