#ifdef HAVE_CONFIG_H

# include "config.h"

#endif

#include <glibmm/i18n.h>

#include <cstring>

#include <string>

#include "display/drawing-group.h"

#include "display/curve.h"

#include "xml/repr.h"

#include "svg/svg.h"

#include "document.h"

#include "document-undo.h"

#include "style.h"

#include "attributes.h"

#include "sp-item-transform.h"

#include "sp-root.h"

#include "sp-use.h"

#include "sp-offset.h"

#include "sp-clippath.h"

#include "sp-mask.h"

#include "sp-path.h"

#include "box3d.h"

#include "persp3d.h"

#include "inkscape.h"

#include "desktop-handles.h"

#include "selection.h"

#include "live_effects/effect.h"

#include "live_effects/lpeobject.h"

#include "live_effects/lpeobject-reference.h"

#include "sp-title.h"

#include "sp-desc.h"

#include "sp-switch.h"

#include "sp-defs.h"

#include "verbs.h"

#include "layer-model.h"

#include "selection-chemistry.h"

#include "sp-textpath.h"

using Inkscape::DocumentUndo;

static void sp_group_build(SPObject *object, SPDocument *document, Inkscape::XML::Node *repr);

static void sp_group_release(SPObject *object);

static void sp_group_dispose(GObject *object);

static void sp_group_child_added (SPObject * object, Inkscape::XML::Node * child, Inkscape::XML::Node * ref);

static void sp_group_remove_child (SPObject * object, Inkscape::XML::Node * child);

static void sp_group_order_changed (SPObject * object, Inkscape::XML::Node * child, Inkscape::XML::Node * old_ref, Inkscape::XML::Node * new_ref);

static void sp_group_update (SPObject *object, SPCtx *ctx, guint flags);

static void sp_group_modified (SPObject *object, guint flags);

static Inkscape::XML::Node *sp_group_write (SPObject *object, Inkscape::XML::Document *doc, Inkscape::XML::Node *repr, guint flags);

static void sp_group_set(SPObject *object, unsigned key, char const *value);

static Geom::OptRect sp_group_bbox(SPItem const *item, Geom::Affine const &transform, SPItem::BBoxType type);

static void sp_group_print (SPItem * item, SPPrintContext *ctx);

static gchar * sp_group_description (SPItem * item);

static Inkscape::DrawingItem *sp_group_show (SPItem *item, Inkscape::Drawing &drawing, unsigned int key, unsigned int flags);

static void sp_group_hide (SPItem * item, unsigned int key);

static void sp_group_snappoints (SPItem const *item, std::vector<Inkscape::SnapCandidatePoint> &p, Inkscape::SnapPreferences const *snapprefs);

static void sp_group_update_patheffect(SPLPEItem *lpeitem, bool write);

static void sp_group_perform_patheffect(SPGroup *group, SPGroup *topgroup, bool write);

G_DEFINE_TYPE(SPGroup, sp_group, SP_TYPE_LPE_ITEM);

static void

sp_group_class_init (SPGroupClass *klass)

{

GObjectClass * object_class;

SPObjectClass * sp_object_class;

SPItemClass * item_class;

SPLPEItemClass * lpe_item_class;

object_class = (GObjectClass *) klass;

sp_object_class = (SPObjectClass *) klass;

item_class = (SPItemClass *) klass;

lpe_item_class = (SPLPEItemClass *) klass;

object_class->dispose = sp_group_dispose;

sp_object_class->child_added = sp_group_child_added;

sp_object_class->remove_child = sp_group_remove_child;

sp_object_class->order_changed = sp_group_order_changed;

sp_object_class->update = sp_group_update;

sp_object_class->modified = sp_group_modified;

sp_object_class->set = sp_group_set;

sp_object_class->write = sp_group_write;

sp_object_class->release = sp_group_release;

sp_object_class->build = sp_group_build;

item_class->bbox = sp_group_bbox;

item_class->print = sp_group_print;

item_class->description = sp_group_description;

item_class->show = sp_group_show;

item_class->hide = sp_group_hide;

item_class->snappoints = sp_group_snappoints;

lpe_item_class->update_patheffect = sp_group_update_patheffect;

}

static void

sp_group_init (SPGroup *group)

{

group->_layer_mode = SPGroup::GROUP;

group->group = new CGroup(group);

new (&group->_display_modes) std::map<unsigned int, SPGroup::LayerMode>();

}

static void sp_group_build(SPObject *object, SPDocument *document, Inkscape::XML::Node *repr)

{

object->readAttr( "inkscape:groupmode" );

if (((SPObjectClass *)sp_group_parent_class)->build) {

((SPObjectClass *)sp_group_parent_class)->build(object, document, repr);

}

}

static void sp_group_release(SPObject *object) {

if ( SP_GROUP(object)->_layer_mode == SPGroup::LAYER ) {

object->document->removeResource("layer", object);

}

if (((SPObjectClass *)sp_group_parent_class)->release) {

((SPObjectClass *)sp_group_parent_class)->release(object);

}

}

static void

sp_group_dispose(GObject *object)

{

SP_GROUP(object)->_display_modes.~map();

delete SP_GROUP(object)->group;

}

static void sp_group_child_added(SPObject *object, Inkscape::XML::Node *child, Inkscape::XML::Node *ref)

{

SPGroup *group = SP_GROUP(object);

if (((SPObjectClass *) (sp_group_parent_class))->child_added) {

(* ((SPObjectClass *) (sp_group_parent_class))->child_added) (object, child, ref);

}

group->group->onChildAdded(child);

}

static void

sp_group_remove_child (SPObject * object, Inkscape::XML::Node * child)

{

if (((SPObjectClass *) (sp_group_parent_class))->remove_child)

(* ((SPObjectClass *) (sp_group_parent_class))->remove_child) (object, child);

SP_GROUP(object)->group->onChildRemoved(child);

}

static void

sp_group_order_changed (SPObject *object, Inkscape::XML::Node *child, Inkscape::XML::Node *old_ref, Inkscape::XML::Node *new_ref)

{

if (((SPObjectClass *) (sp_group_parent_class))->order_changed)

(* ((SPObjectClass *) (sp_group_parent_class))->order_changed) (object, child, old_ref, new_ref);

SP_GROUP(object)->group->onOrderChanged(child, old_ref, new_ref);

}

static void

sp_group_update (SPObject *object, SPCtx *ctx, unsigned int flags)

{

if (((SPObjectClass *) (sp_group_parent_class))->update)

((SPObjectClass *) (sp_group_parent_class))->update (object, ctx, flags);

SP_GROUP(object)->group->onUpdate(ctx, flags);

}

static void

sp_group_modified (SPObject *object, guint flags)

{

if (((SPObjectClass *) (sp_group_parent_class))->modified)

((SPObjectClass *) (sp_group_parent_class))->modified (object, flags);

SP_GROUP(object)->group->onModified(flags);

}

static Inkscape::XML::Node * sp_group_write(SPObject *object, Inkscape::XML::Document *xml_doc, Inkscape::XML::Node *repr, guint flags)

{

SPGroup *group = SP_GROUP(object);

if (flags & SP_OBJECT_WRITE_BUILD) {

GSList *l;

if (!repr) {

if (SP_IS_SWITCH(object)) {

repr = xml_doc->createElement("svg:switch");

} else {

repr = xml_doc->createElement("svg:g");

}

}

l = NULL;

for (SPObject *child = object->firstChild(); child; child = child->getNext() ) {

if ( !SP_IS_TITLE(child) && !SP_IS_DESC(child) ) {

Inkscape::XML::Node *crepr = child->updateRepr(xml_doc, NULL, flags);

if (crepr) {

l = g_slist_prepend (l, crepr);

}

}

}

while (l) {

repr->addChild((Inkscape::XML::Node *) l->data, NULL);

Inkscape::GC::release((Inkscape::XML::Node *) l->data);

l = g_slist_remove (l, l->data);

}

} else {

for (SPObject *child = object->firstChild() ; child ; child = child->getNext() ) {

if ( !SP_IS_TITLE(child) && !SP_IS_DESC(child) ) {

child->updateRepr(flags);

}

}

}

if ( flags & SP_OBJECT_WRITE_EXT ) {

const char *value;

if ( group->_layer_mode == SPGroup::LAYER ) {

value = "layer";

} else if ( group->_layer_mode == SPGroup::MASK_HELPER ) {

value = "maskhelper";

} else if ( flags & SP_OBJECT_WRITE_ALL ) {

value = "group";

} else {

value = NULL;

}

repr->setAttribute("inkscape:groupmode", value);

}

if (((SPObjectClass *) (sp_group_parent_class))->write) {

((SPObjectClass *) (sp_group_parent_class))->write (object, xml_doc, repr, flags);

}

return repr;

}

static Geom::OptRect

sp_group_bbox(SPItem const *item, Geom::Affine const &transform, SPItem::BBoxType type)

{

return SP_GROUP(item)->group->bounds(type, transform);

}

static void

sp_group_print (SPItem * item, SPPrintContext *ctx)

{

SP_GROUP(item)->group->onPrint(ctx);

}

static gchar * sp_group_description (SPItem * item)

{

return SP_GROUP(item)->group->getDescription();

}

static void sp_group_set(SPObject *object, unsigned key, char const *value) {

SPGroup *group = SP_GROUP(object);

switch (key) {

case SP_ATTR_INKSCAPE_GROUPMODE:

if ( value && !strcmp(value, "layer") ) {

group->setLayerMode(SPGroup::LAYER);

} else if ( value && !strcmp(value, "maskhelper") ) {

group->setLayerMode(SPGroup::MASK_HELPER);

} else {

group->setLayerMode(SPGroup::GROUP);

}

break;

default: {

if (((SPObjectClass *) (sp_group_parent_class))->set) {

(* ((SPObjectClass *) (sp_group_parent_class))->set)(object, key, value);

}

}

}

}

static Inkscape::DrawingItem *

sp_group_show (SPItem *item, Inkscape::Drawing &drawing, unsigned int key, unsigned int flags)

{

return SP_GROUP(item)->group->show(drawing, key, flags);

}

static void

sp_group_hide (SPItem *item, unsigned int key)

{

SP_GROUP(item)->group->hide(key);

}

static void sp_group_snappoints(SPItem const *item, std::vector<Inkscape::SnapCandidatePoint> &p, Inkscape::SnapPreferences const *snapprefs)

{

for ( SPObject const *o = item->firstChild(); o; o = o->getNext() )

{

if (SP_IS_ITEM(o)) {

SP_ITEM(o)->getSnappoints(p, snapprefs);

}

}

}

sp_item_group_ungroup (SPGroup *group, GSList **children, bool do_done)

{

g_return_if_fail (group != NULL);

g_return_if_fail (SP_IS_GROUP (group));

SPDocument *doc = group->document;

SPRoot *root = doc->getRoot();

SPObject *defs = root->defs;

SPItem *gitem = group;

Inkscape::XML::Node *grepr = gitem->getRepr();

g_return_if_fail (!strcmp (grepr->name(), "svg:g")

|| !strcmp (grepr->name(), "svg:a")

|| !strcmp (grepr->name(), "svg:switch")

|| !strcmp (grepr->name(), "svg:svg"));

// this converts the gradient/pattern fill/stroke on the group, if any, to userSpaceOnUse

gitem->adjust_paint_recursive (Geom::identity(), Geom::identity(), false);

SPItem *pitem = SP_ITEM(gitem->parent);

Inkscape::XML::Node *prepr = pitem->getRepr();

if (SP_IS_BOX3D(gitem)) {

group = box3d_convert_to_group(SP_BOX3D(gitem));

gitem = group;

}

sp_lpe_item_remove_all_path_effects(SP_LPE_ITEM(group), false);

/* Step 1 - generate lists of children objects */

GSList *items = NULL;

GSList *objects = NULL;

for (SPObject *child = group->firstChild() ; child; child = child->getNext() ) {

if (SP_IS_ITEM (child)) {

SPItem *citem = SP_ITEM (child);

/* Merging of style */

// this converts the gradient/pattern fill/stroke, if any, to userSpaceOnUse; we need to do

// it here _before_ the new transform is set, so as to use the pre-transform bbox

citem->adjust_paint_recursive (Geom::identity(), Geom::identity(), false);

sp_style_merge_from_dying_parent(child->style, gitem->style);

/*

child->updateRepr();

Inkscape::XML::Node *nrepr = child->getRepr()->duplicate(prepr->document());

// Merging transform

Geom::Affine ctrans;

Geom::Affine const g(gitem->transform);

if (SP_IS_USE(citem) && sp_use_get_original (SP_USE(citem)) &&

sp_use_get_original( SP_USE(citem) )->parent == SP_OBJECT(group)) {

// make sure a clone's effective transform is the same as was under group

ctrans = g.inverse() * citem->transform * g;

} else {

// We should not apply the group's transformation to both a linked offset AND to its source

if (SP_IS_OFFSET(citem)) { // Do we have an offset at hand (whether it's dynamic or linked)?

SPItem *source = sp_offset_get_source(SP_OFFSET(citem));

// When dealing with a chain of linked offsets, the transformation of an offset will be

// tied to the transformation of the top-most source, not to any of the intermediate

// offsets. So let's find the top-most source

while (source != NULL && SP_IS_OFFSET(source)) {

source = sp_offset_get_source(SP_OFFSET(source));

}

if (source != NULL && // If true then we must be dealing with a linked offset ...

group->isAncestorOf(source) == false) { // ... of which the source is not in the same group

ctrans = citem->transform * g; // then we should apply the transformation of the group to the offset

} else {

ctrans = citem->transform;

}

} else {

ctrans = citem->transform * g;

}

}

// FIXME: constructing a transform that would fully preserve the appearance of a

// textpath if it is ungrouped with its path seems to be impossible in general

// case. E.g. if the group was squeezed, to keep the ungrouped textpath squeezed

// as well, we'll need to relink it to some "virtual" path which is inversely

// stretched relative to the actual path, and then squeeze the textpath back so it

// would both fit the actual path _and_ be squeezed as before. It's a bummer.

// This is just a way to temporarily remember the transform in repr. When repr is

// reattached outside of the group, the transform will be written more properly

// (i.e. optimized into the object if the corresponding preference is set)

gchar *affinestr=sp_svg_transform_write(ctrans);

nrepr->setAttribute("transform", affinestr);

g_free(affinestr);

items = g_slist_prepend (items, nrepr);

} else {

Inkscape::XML::Node *nrepr = child->getRepr()->duplicate(prepr->document());

objects = g_slist_prepend (objects, nrepr);

}

}

/* Step 2 - clear group */

// remember the position of the group

gint pos = group->getRepr()->position();

// the group is leaving forever, no heir, clones should take note; its children however are going to reemerge

group->deleteObject(true, false);

/* Step 3 - add nonitems */

if (objects) {

Inkscape::XML::Node *last_def = defs->getRepr()->lastChild();

while (objects) {

Inkscape::XML::Node *repr = (Inkscape::XML::Node *) objects->data;

if (!sp_repr_is_meta_element(repr)) {

defs->getRepr()->addChild(repr, last_def);

}

Inkscape::GC::release(repr);

objects = g_slist_remove (objects, objects->data);

}

}

/* Step 4 - add items */

while (items) {

Inkscape::XML::Node *repr = (Inkscape::XML::Node *) items->data;

// add item

prepr->appendChild(repr);

// restore position; since the items list was prepended (i.e. reverse), we now add

// all children at the same pos, which inverts the order once again

repr->setPosition(pos > 0 ? pos : 0);

// fill in the children list if non-null

SPItem *item = static_cast<SPItem *>(doc->getObjectByRepr(repr));

item->doWriteTransform(repr, item->transform, NULL, false);

Inkscape::GC::release(repr);

if (children && SP_IS_ITEM(item)) {

*children = g_slist_prepend(*children, item);

}

items = g_slist_remove (items, items->data);

}

if (do_done) {

DocumentUndo::done(doc, SP_VERB_NONE, _("Ungroup"));

}

}

GSList *sp_item_group_item_list(SPGroup * group)

{

g_return_val_if_fail(group != NULL, NULL);

g_return_val_if_fail(SP_IS_GROUP(group), NULL);

GSList *s = NULL;

for (SPObject *o = group->firstChild() ; o ; o = o->getNext() ) {

if ( SP_IS_ITEM(o) ) {

s = g_slist_prepend(s, o);

}

}

return g_slist_reverse (s);

}

SPObject *sp_item_group_get_child_by_name(SPGroup *group, SPObject *ref, const gchar *name)

{

SPObject *child = (ref) ? ref->getNext() : group->firstChild();

while ( child && strcmp(child->getRepr()->name(), name) ) {

child = child->getNext();

}

return child;

}

void SPGroup::setLayerMode(LayerMode mode) {

if ( _layer_mode != mode ) {

if ( mode == LAYER ) {

this->document->addResource("layer", this);

} else if ( _layer_mode == LAYER ) {

this->document->removeResource("layer", this);

}

_layer_mode = mode;

_updateLayerMode();

}

}

SPGroup::LayerMode SPGroup::layerDisplayMode(unsigned int dkey) const {

std::map<unsigned int, LayerMode>::const_iterator iter;

iter = _display_modes.find(dkey);

if ( iter != _display_modes.end() ) {

return (*iter).second;

} else {

return GROUP;

}

}

void SPGroup::setLayerDisplayMode(unsigned int dkey, SPGroup::LayerMode mode) {

if ( layerDisplayMode(dkey) != mode ) {

_display_modes[dkey] = mode;

_updateLayerMode(dkey);

}

}

void SPGroup::_updateLayerMode(unsigned int display_key) {

SPItemView *view;

for ( view = this->display ; view ; view = view->next ) {

if ( !display_key || view->key == display_key ) {

Inkscape::DrawingGroup *g = dynamic_cast<Inkscape::DrawingGroup *>(view->arenaitem);

if (g) {

g->setPickChildren(effectiveLayerMode(view->key) == SPGroup::LAYER);

}

}

}

}

void SPGroup::translateChildItems(Geom::Translate const &tr)

{

if ( hasChildren() ) {

for (SPObject *o = firstChild() ; o ; o = o->getNext() ) {

if ( SP_IS_ITEM(o) ) {

sp_item_move_rel(reinterpret_cast<SPItem *>(o), tr);

}

}

}

}

void SPGroup::scaleChildItemsRec(Geom::Scale const &sc, Geom::Point const &p)

{

if ( hasChildren() ) {

for (SPObject *o = firstChild() ; o ; o = o->getNext() ) {

if ( SP_IS_ITEM(o) ) {

if (SP_IS_GROUP(o) && !SP_IS_BOX3D(o)) {

SP_GROUP(o)->scaleChildItemsRec(sc, p);

} else {

SPItem *item = SP_ITEM(o);

Geom::OptRect bbox = item->desktopVisualBounds();

if (bbox) {

// Scale item

Geom::Translate const s(p);

Geom::Affine final = s.inverse() * sc * s;

Geom::Point old_center(0,0);

if (item->isCenterSet()) {

old_center = item->getCenter();

}

if (SP_IS_TEXT_TEXTPATH(item) && item->transform.isIdentity()) {

if (item->transform.isIdentity()) {

SP_TEXT(item)->optimizeTextpathText();

} else {

// TODO: transformed text on textpath

}

} else if (SP_IS_BOX3D(item)) {

// Force recalculation from perspective

box3d_position_set(SP_BOX3D(item));

}

if (SP_IS_USE(item)) {

// calculate the matrix we need to apply to the clone

// to cancel its induced transform from its original

Geom::Affine move = final.inverse() * item->transform * final;

item->doWriteTransform(item->getRepr(), move, &move, true);

} else {

item->set_i2d_affine(item->i2dt_affine() * final);

item->doWriteTransform(item->getRepr(), item->transform, NULL, true);

}

if (item->isCenterSet() && !(final.isTranslation() || final.isIdentity())) {

item->setCenter(old_center * final);

item->updateRepr();

}

}

}

}

}

}

}

CGroup::CGroup(SPGroup *group) {

_group = group;

}

CGroup::~CGroup() {

}

void CGroup::onChildAdded(Inkscape::XML::Node *child) {

SPObject *last_child = _group->lastChild();

if (last_child && last_child->getRepr() == child) {

// optimization for the common special case where the child is being added at the end

SPObject *ochild = last_child;

if ( SP_IS_ITEM(ochild) ) {

/* TODO: this should be moved into SPItem somehow */

SPItemView *v;

Inkscape::DrawingItem *ac;

for (v = _group->display; v != NULL; v = v->next) {

ac = SP_ITEM (ochild)->invoke_show (v->arenaitem->drawing(), v->key, v->flags);

if (ac) {

v->arenaitem->appendChild(ac);

}

}

}

} else { // general case

SPObject *ochild = _group->get_child_by_repr(child);

if ( ochild && SP_IS_ITEM(ochild) ) {

/* TODO: this should be moved into SPItem somehow */

SPItemView *v;

Inkscape::DrawingItem *ac;

unsigned position = SP_ITEM(ochild)->pos_in_parent();

for (v = _group->display; v != NULL; v = v->next) {

ac = SP_ITEM (ochild)->invoke_show (v->arenaitem->drawing(), v->key, v->flags);

if (ac) {

v->arenaitem->prependChild(ac);

ac->setZOrder(position);

}

}

}

}

_group->requestModified(SP_OBJECT_MODIFIED_FLAG);

}

void CGroup::onChildRemoved(Inkscape::XML::Node */*child*/) {

_group->requestModified(SP_OBJECT_MODIFIED_FLAG);

}

void CGroup::onUpdate(SPCtx *ctx, unsigned int flags) {

SPItemCtx *ictx, cctx;

ictx = (SPItemCtx *) ctx;

cctx = *ictx;

if (flags & SP_OBJECT_MODIFIED_FLAG) {

flags |= SP_OBJECT_PARENT_MODIFIED_FLAG;

}

flags &= SP_OBJECT_MODIFIED_CASCADE;

if (flags & SP_OBJECT_STYLE_MODIFIED_FLAG) {

SPObject *object = _group;

for (SPItemView *v = _group->display; v != NULL; v = v->next) {

Inkscape::DrawingGroup *group = dynamic_cast<Inkscape::DrawingGroup *>(v->arenaitem);

group->setStyle(object->style);

}

}

GSList *l = g_slist_reverse(_group->childList(true, SPObject::ActionUpdate));

while (l) {

SPObject *child = SP_OBJECT (l->data);

l = g_slist_remove (l, child);

if (flags || (child->uflags & (SP_OBJECT_MODIFIED_FLAG | SP_OBJECT_CHILD_MODIFIED_FLAG))) {

if (SP_IS_ITEM (child)) {

SPItem const &chi = *SP_ITEM(child);

cctx.i2doc = chi.transform * ictx->i2doc;

cctx.i2vp = chi.transform * ictx->i2vp;

child->updateDisplay((SPCtx *)&cctx, flags);

} else {

child->updateDisplay(ctx, flags);

}

}

g_object_unref (G_OBJECT (child));

}

}

void CGroup::onModified(guint flags) {

SPObject *child;

if (flags & SP_OBJECT_MODIFIED_FLAG) flags |= SP_OBJECT_PARENT_MODIFIED_FLAG;

flags &= SP_OBJECT_MODIFIED_CASCADE;

if (flags & SP_OBJECT_STYLE_MODIFIED_FLAG) {

SPObject *object = _group;

for (SPItemView *v = _group->display; v != NULL; v = v->next) {

Inkscape::DrawingGroup *group = dynamic_cast<Inkscape::DrawingGroup *>(v->arenaitem);

group->setStyle(object->style);

}

}

GSList *l = g_slist_reverse(_group->childList(true));

while (l) {

child = SP_OBJECT (l->data);

l = g_slist_remove (l, child);

if (flags || (child->mflags & (SP_OBJECT_MODIFIED_FLAG | SP_OBJECT_CHILD_MODIFIED_FLAG))) {

child->emitModified(flags);

}

g_object_unref (G_OBJECT (child));

}

}

Geom::OptRect CGroup::bounds(SPItem::BBoxType type, Geom::Affine const &transform)

{

Geom::OptRect bbox;

GSList *l = _group->childList(false, SPObject::ActionBBox);

while (l) {

SPObject *o = SP_OBJECT (l->data);

if (SP_IS_ITEM(o) && !SP_ITEM(o)->isHidden()) {

SPItem *child = SP_ITEM(o);

Geom::Affine const ct(child->transform * transform);

bbox |= child->bounds(type, ct);

}

l = g_slist_remove (l, o);

}

return bbox;

}

void CGroup::onPrint(SPPrintContext *ctx) {

GSList *l = g_slist_reverse(_group->childList(false));

while (l) {

SPObject *o = SP_OBJECT (l->data);

if (SP_IS_ITEM(o)) {

SP_ITEM(o)->invoke_print (ctx);

}

l = g_slist_remove (l, o);

}

}

gint CGroup::getItemCount() {

gint len = 0;

for (SPObject *o = _group->firstChild() ; o ; o = o->getNext() ) {

if (SP_IS_ITEM(o)) {

len++;

}

}

return len;

}

gchar *CGroup::getDescription() {

gint len = getItemCount();

return g_strdup_printf(

ngettext("<b>Group</b> of <b>%d</b> object",

"<b>Group</b> of <b>%d</b> objects",

len), len);

}

Inkscape::DrawingItem *CGroup::show (Inkscape::Drawing &drawing, unsigned int key, unsigned int flags) {

Inkscape::DrawingGroup *ai;

SPObject *object = _group;

ai = new Inkscape::DrawingGroup(drawing);

ai->setPickChildren(_group->effectiveLayerMode(key) == SPGroup::LAYER);

ai->setStyle(object->style);

_showChildren(drawing, ai, key, flags);

return ai;

}

void CGroup::_showChildren (Inkscape::Drawing &drawing, Inkscape::DrawingItem *ai, unsigned int key, unsigned int flags) {

Inkscape::DrawingItem *ac = NULL;

SPItem * child = NULL;

GSList *l = g_slist_reverse(_group->childList(false, SPObject::ActionShow));

while (l) {

SPObject *o = SP_OBJECT (l->data);

if (SP_IS_ITEM (o)) {

child = SP_ITEM (o);

ac = child->invoke_show (drawing, key, flags);

if (ac) {

ai->appendChild(ac);

}

}

l = g_slist_remove (l, o);

}

}

void CGroup::hide (unsigned int key) {

SPItem * child;

GSList *l = g_slist_reverse(_group->childList(false, SPObject::ActionShow));

while (l) {

SPObject *o = SP_OBJECT (l->data);

if (SP_IS_ITEM (o)) {

child = SP_ITEM (o);

child->invoke_hide (key);

}

l = g_slist_remove (l, o);

}

if (((SPItemClass *) sp_group_parent_class)->hide)

((SPItemClass *) sp_group_parent_class)->hide (_group, key);

}

void CGroup::onOrderChanged (Inkscape::XML::Node *child, Inkscape::XML::Node *, Inkscape::XML::Node *)

{

SPObject *ochild = _group->get_child_by_repr(child);

if ( ochild && SP_IS_ITEM(ochild) ) {

/* TODO: this should be moved into SPItem somehow */

SPItemView *v;

unsigned position = SP_ITEM(ochild)->pos_in_parent();

for ( v = SP_ITEM (ochild)->display ; v != NULL ; v = v->next ) {

v->arenaitem->setZOrder(position);

}

}

_group->requestModified(SP_OBJECT_MODIFIED_FLAG);

}

static void

sp_group_update_patheffect (SPLPEItem *lpeitem, bool write)

{

#ifdef GROUP_VERBOSE

g_message("sp_group_update_patheffect: %p\n", lpeitem);

#endif

g_return_if_fail (lpeitem != NULL);

g_return_if_fail (SP_IS_GROUP (lpeitem));

GSList const *item_list = sp_item_group_item_list(SP_GROUP(lpeitem));

for ( GSList const *iter = item_list; iter; iter = iter->next ) {

SPObject *subitem = static_cast<SPObject *>(iter->data);

if (SP_IS_LPE_ITEM(subitem)) {

if (SP_LPE_ITEM_CLASS (G_OBJECT_GET_CLASS (subitem))->update_patheffect) {

SP_LPE_ITEM_CLASS (G_OBJECT_GET_CLASS (subitem))->update_patheffect (SP_LPE_ITEM(subitem), write);

}

}

}

if (sp_lpe_item_has_path_effect(lpeitem) && sp_lpe_item_path_effects_enabled(lpeitem)) {

for (PathEffectList::iterator it = lpeitem->path_effect_list->begin(); it != lpeitem->path_effect_list->end(); it++)

{

LivePathEffectObject *lpeobj = (*it)->lpeobject;

if (lpeobj && lpeobj->get_lpe()) {

lpeobj->get_lpe()->doBeforeEffect(lpeitem);

}

}

sp_group_perform_patheffect(SP_GROUP(lpeitem), SP_GROUP(lpeitem), write);

}

}

static void

sp_group_perform_patheffect(SPGroup *group, SPGroup *topgroup, bool write)

{

GSList const *item_list = sp_item_group_item_list(SP_GROUP(group));

for ( GSList const *iter = item_list; iter; iter = iter->next ) {

SPObject *subitem = static_cast<SPObject *>(iter->data);

if (SP_IS_GROUP(subitem)) {

sp_group_perform_patheffect(SP_GROUP(subitem), topgroup, write);

} else if (SP_IS_SHAPE(subitem)) {

SPCurve * c = NULL;

if (SP_IS_PATH(subitem)) {

c = SP_PATH(subitem)->get_original_curve();

} else {

c = SP_SHAPE(subitem)->getCurve();

}

// only run LPEs when the shape has a curve defined

if (c) {

sp_lpe_item_perform_path_effect(SP_LPE_ITEM(topgroup), c);

SP_SHAPE(subitem)->setCurve(c, TRUE);

if (write) {

Inkscape::XML::Node *repr = subitem->getRepr();

gchar *str = sp_svg_write_path(c->get_pathvector());

repr->setAttribute("d", str);

#ifdef GROUP_VERBOSE

g_message("sp_group_perform_patheffect writes 'd' attribute");

#endif

g_free(str);

}

c->unref();

}

}

}

}