#ifdef HAVE_CONFIG_H

# include <config.h>

#endif

#include <cstring>

#include <string>

#include <2geom/transforms.h>

#include <glibmm/i18n.h>

#include "display/drawing-group.h"

#include "attributes.h"

#include "document.h"

#include "sp-object-repr.h"

#include "sp-flowregion.h"

#include "uri.h"

#include "print.h"

#include "xml/repr.h"

#include "svg/svg.h"

#include "preferences.h"

#include "style.h"

#include "sp-symbol.h"

#include "sp-use.h"

#include "sp-use-reference.h"

static void sp_use_finalize(GObject *obj);

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

static void sp_use_release(SPObject *object);

static void sp_use_set(SPObject *object, unsigned key, gchar const *value);

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

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

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

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

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

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

static gchar *sp_use_description(SPItem *item);

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

static void sp_use_hide(SPItem *item, unsigned key);

static void sp_use_href_changed(SPObject *old_ref, SPObject *ref, SPUse *use);

static void sp_use_delete_self(SPObject *deleted, SPUse *self);

G_DEFINE_TYPE(SPUse, sp_use, SP_TYPE_ITEM);

static void

sp_use_class_init(SPUseClass *classname)

{

GObjectClass *gobject_class = (GObjectClass *) classname;

SPObjectClass *sp_object_class = (SPObjectClass *) classname;

SPItemClass *item_class = (SPItemClass *) classname;

gobject_class->finalize = sp_use_finalize;

sp_object_class->build = sp_use_build;

sp_object_class->release = sp_use_release;

sp_object_class->set = sp_use_set;

sp_object_class->write = sp_use_write;

sp_object_class->update = sp_use_update;

sp_object_class->modified = sp_use_modified;

item_class->bbox = sp_use_bbox;

item_class->description = sp_use_description;

item_class->print = sp_use_print;

item_class->show = sp_use_show;

item_class->hide = sp_use_hide;

item_class->snappoints = sp_use_snappoints;

}

static void

sp_use_init(SPUse *use)

{

use->x.unset();

use->y.unset();

use->width.unset(SVGLength::PERCENT, 1.0, 1.0);

use->height.unset(SVGLength::PERCENT, 1.0, 1.0);

use->href = NULL;

new (&use->_delete_connection) sigc::connection();

new (&use->_changed_connection) sigc::connection();

new (&use->_transformed_connection) sigc::connection();

use->ref = new SPUseReference(use);

use->_changed_connection = use->ref->changedSignal().connect(sigc::bind(sigc::ptr_fun(sp_use_href_changed), use));

}

static void

sp_use_finalize(GObject *obj)

{

SPUse *use = reinterpret_cast<SPUse *>(obj);

if (use->child) {

use->detach(use->child);

use->child = NULL;

}

use->ref->detach();

delete use->ref;

use->ref = 0;

use->_delete_connection.~connection();

use->_changed_connection.~connection();

use->_transformed_connection.~connection();

}

static void

sp_use_build(SPObject *object, SPDocument *document, Inkscape::XML::Node *repr)

{

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

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

}

object->readAttr( "x" );

object->readAttr( "y" );

object->readAttr( "width" );

object->readAttr( "height" );

object->readAttr( "xlink:href" );

// We don't need to create child here:

// reading xlink:href will attach ref, and that will cause the changed signal to be emitted,

// which will call sp_use_href_changed, and that will take care of the child

}

static void

sp_use_release(SPObject *object)

{

SPUse *use = SP_USE(object);

if (use->child) {

object->detach(use->child);

use->child = NULL;

}

use->_delete_connection.disconnect();

use->_changed_connection.disconnect();

use->_transformed_connection.disconnect();

g_free(use->href);

use->href = NULL;

use->ref->detach();

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

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

}

}

static void

sp_use_set(SPObject *object, unsigned key, gchar const *value)

{

SPUse *use = SP_USE(object);

switch (key) {

case SP_ATTR_X:

use->x.readOrUnset(value);

object->requestDisplayUpdate(SP_OBJECT_MODIFIED_FLAG);

break;

case SP_ATTR_Y:

use->y.readOrUnset(value);

object->requestDisplayUpdate(SP_OBJECT_MODIFIED_FLAG);

break;

case SP_ATTR_WIDTH:

use->width.readOrUnset(value, SVGLength::PERCENT, 1.0, 1.0);

object->requestDisplayUpdate(SP_OBJECT_MODIFIED_FLAG);

break;

case SP_ATTR_HEIGHT:

use->height.readOrUnset(value, SVGLength::PERCENT, 1.0, 1.0);

object->requestDisplayUpdate(SP_OBJECT_MODIFIED_FLAG);

break;

case SP_ATTR_XLINK_HREF: {

if ( value && use->href && ( strcmp(value, use->href) == 0 ) ) {

/* No change, do nothing. */

} else {

g_free(use->href);

use->href = NULL;

if (value) {

// First, set the href field, because sp_use_href_changed will need it.

use->href = g_strdup(value);

// Now do the attaching, which emits the changed signal.

try {

use->ref->attach(Inkscape::URI(value));

} catch (Inkscape::BadURIException &e) {

g_warning("%s", e.what());

use->ref->detach();

}

} else {

use->ref->detach();

}

}

break;

}

default:

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

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

}

break;

}

}

static Inkscape::XML::Node *

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

{

SPUse *use = SP_USE(object);

if ((flags & SP_OBJECT_WRITE_BUILD) && !repr) {

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

}

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

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

}

sp_repr_set_svg_double(repr, "x", use->x.computed);

sp_repr_set_svg_double(repr, "y", use->y.computed);

repr->setAttribute("width", sp_svg_length_write_with_units(use->width).c_str());

repr->setAttribute("height", sp_svg_length_write_with_units(use->height).c_str());

if (use->ref->getURI()) {

gchar *uri_string = use->ref->getURI()->toString();

repr->setAttribute("xlink:href", uri_string);

g_free(uri_string);

}

return repr;

}

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

{

SPUse const *use = SP_USE(item);

Geom::OptRect bbox;

if (use->child && SP_IS_ITEM(use->child)) {

SPItem *child = SP_ITEM(use->child);

Geom::Affine const ct( child->transform

* Geom::Translate(use->x.computed,

use->y.computed)

* transform );

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

}

return bbox;

}

static void sp_use_print(SPItem *item, SPPrintContext *ctx)

{

bool translated = false;

SPUse *use = SP_USE(item);

if ((use->x._set && use->x.computed != 0) || (use->y._set && use->y.computed != 0)) {

Geom::Affine tp(Geom::Translate(use->x.computed, use->y.computed));

sp_print_bind(ctx, tp, 1.0);

translated = true;

}

if (use->child && SP_IS_ITEM(use->child)) {

SP_ITEM(use->child)->invoke_print(ctx);

}

if (translated) {

sp_print_release(ctx);

}

}

static gchar *sp_use_description(SPItem *item)

{

SPUse *use = SP_USE(item);

if (use->child) {

if( SP_IS_SYMBOL( use->child ) ) {

char *symbol_desc = SP_ITEM(use->child)->title();

return g_strdup_printf(_("<b>'%s' Symbol</b>"), symbol_desc );

g_free(symbol_desc);

}

static unsigned recursion_depth = 0;

if (recursion_depth >= 4) {

/* TRANSLATORS: Used for statusbar description for long <use> chains:

return g_strdup(_("..."));

/* We could do better, e.g. chasing the href chain until we reach something other than

}

++recursion_depth;

char *child_desc = SP_ITEM(use->child)->description();

--recursion_depth;

char *ret = g_strdup_printf(_("<b>Clone</b> of: %s"), child_desc);

g_free(child_desc);

return ret;

} else {

return g_strdup(_("<b>Orphaned clone</b>"));

}

}

static Inkscape::DrawingItem *

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

{

SPUse *use = SP_USE(item);

Inkscape::DrawingGroup *ai = new Inkscape::DrawingGroup(drawing);

ai->setPickChildren(false);

ai->setStyle(item->style);

if (use->child) {

Inkscape::DrawingItem *ac = SP_ITEM(use->child)->invoke_show(drawing, key, flags);

if (ac) {

ai->prependChild(ac);

}

Geom::Translate t(use->x.computed,

use->y.computed);

ai->setChildTransform(t);

}

return ai;

}

static void

sp_use_hide(SPItem *item, unsigned key)

{

SPUse *use = SP_USE(item);

if (use->child) {

SP_ITEM(use->child)->invoke_hide(key);

}

if (((SPItemClass *) sp_use_parent_class)->hide) {

((SPItemClass *) sp_use_parent_class)->hide(item, key);

}

}

SPItem *

sp_use_root(SPUse *use)

{

SPObject *orig = use->child;

while (orig && SP_IS_USE(orig)) {

orig = SP_USE(orig)->child;

}

if (!orig || !SP_IS_ITEM(orig))

return NULL;

return SP_ITEM(orig);

}

Geom::Affine

sp_use_get_root_transform(SPUse *use)

{

//track the ultimate source of a chain of uses

SPObject *orig = use->child;

GSList *chain = NULL;

chain = g_slist_prepend(chain, use);

while (SP_IS_USE(orig)) {

chain = g_slist_prepend(chain, orig);

orig = SP_USE(orig)->child;

}

chain = g_slist_prepend(chain, orig);

//calculate the accummulated transform, starting from the original

Geom::Affine t(Geom::identity());

for (GSList *i = chain; i != NULL; i = i->next) {

SPItem *i_tem = SP_ITEM(i->data);

// "An additional transformation translate(x,y) is appended to the end (i.e.,

// right-side) of the transform attribute on the generated 'g', where x and y

// represent the values of the x and y attributes on the 'use' element." - http://www.w3.org/TR/SVG11/struct.html#UseElement

if (SP_IS_USE(i_tem)) {

SPUse *i_use = SP_USE(i_tem);

if ((i_use->x._set && i_use->x.computed != 0) || (i_use->y._set && i_use->y.computed != 0)) {

t = t * Geom::Translate(i_use->x._set ? i_use->x.computed : 0, i_use->y._set ? i_use->y.computed : 0);

}

}

t *= i_tem->transform;

}

g_slist_free(chain);

return t;

}

Geom::Affine

sp_use_get_parent_transform(SPUse *use)

{

Geom::Affine t(Geom::identity());

if ((use->x._set && use->x.computed != 0) || (use->y._set && use->y.computed != 0)) {

t *= Geom::Translate(use->x._set ? use->x.computed : 0,

use->y._set ? use->y.computed : 0);

}

t *= SP_ITEM(use)->transform;

return t;

}

static void

sp_use_move_compensate(Geom::Affine const *mp, SPItem */*original*/, SPUse *self)

{

// the clone is orphaned; or this is not a real use, but a clone of another use;

// we skip it, otherwise duplicate compensation will occur

if (self->cloned) {

return;

}

// never compensate uses which are used in flowtext

if (self->parent && SP_IS_FLOWREGION(self->parent)) {

return;

}

Inkscape::Preferences *prefs = Inkscape::Preferences::get();

guint mode = prefs->getInt("/options/clonecompensation/value", SP_CLONE_COMPENSATION_PARALLEL);

// user wants no compensation

if (mode == SP_CLONE_COMPENSATION_NONE)

return;

Geom::Affine m(*mp);

// this is not a simple move, do not try to compensate

if (!(m.isTranslation()))

return;

// restore item->transform field from the repr, in case it was changed by seltrans

self->readAttr ("transform");

Geom::Affine t = sp_use_get_parent_transform(self);

Geom::Affine clone_move = t.inverse() * m * t;

// calculate the compensation matrix and the advertized movement matrix

Geom::Affine advertized_move;

if (mode == SP_CLONE_COMPENSATION_PARALLEL) {

clone_move = clone_move.inverse() * m;

advertized_move = m;

} else if (mode == SP_CLONE_COMPENSATION_UNMOVED) {

clone_move = clone_move.inverse();

advertized_move.setIdentity();

} else {

g_assert_not_reached();

}

// commit the compensation

self->transform *= clone_move;

self->doWriteTransform(self->getRepr(), self->transform, &advertized_move);

self->requestDisplayUpdate(SP_OBJECT_MODIFIED_FLAG);

}

static void

sp_use_href_changed(SPObject */*old_ref*/, SPObject */*ref*/, SPUse *use)

{

SPItem *item = SP_ITEM(use);

use->_delete_connection.disconnect();

use->_transformed_connection.disconnect();

if (use->child) {

use->detach(use->child);

use->child = NULL;

}

if (use->href) {

SPItem *refobj = use->ref->getObject();

if (refobj) {

Inkscape::XML::Node *childrepr = refobj->getRepr();

GType type = sp_repr_type_lookup(childrepr);

g_return_if_fail(type > G_TYPE_NONE);

if (g_type_is_a(type, SP_TYPE_ITEM)) {

use->child = (SPObject*) g_object_new(type, 0);

use->attach(use->child, use->lastChild());

sp_object_unref(use->child, use);

(use->child)->invoke_build(use->document, childrepr, TRUE);

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

Inkscape::DrawingItem *ai;

ai = SP_ITEM(use->child)->invoke_show(v->arenaitem->drawing(), v->key, v->flags);

if (ai) {

v->arenaitem->prependChild(ai);

}

}

}

use->_delete_connection = refobj->connectDelete(sigc::bind(sigc::ptr_fun(&sp_use_delete_self), use));

use->_transformed_connection = SP_ITEM(refobj)->connectTransformed(sigc::bind(sigc::ptr_fun(&sp_use_move_compensate), use));

}

}

}

static void

sp_use_delete_self(SPObject */*deleted*/, SPUse *self)

{

// always delete uses which are used in flowtext

if (self->parent && SP_IS_FLOWREGION(self->parent)) {

self->deleteObject();

return;

}

Inkscape::Preferences *prefs = Inkscape::Preferences::get();

guint const mode = prefs->getInt("/options/cloneorphans/value",

SP_CLONE_ORPHANS_UNLINK);

if (mode == SP_CLONE_ORPHANS_UNLINK) {

sp_use_unlink(self);

} else if (mode == SP_CLONE_ORPHANS_DELETE) {

self->deleteObject();

}

}

static void

sp_use_update(SPObject *object, SPCtx *ctx, unsigned flags)

{

SPItem *item = SP_ITEM(object);

SPUse *use = SP_USE(object);

SPItemCtx *ictx = (SPItemCtx *) ctx;

SPItemCtx cctx = *ictx;

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

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

if (flags & SP_OBJECT_MODIFIED_FLAG) {

flags |= SP_OBJECT_PARENT_MODIFIED_FLAG;

}

flags &= SP_OBJECT_MODIFIED_CASCADE;

if (flags & SP_OBJECT_STYLE_MODIFIED_FLAG) {

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

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

g->setStyle(object->style);

}

}

/* Set up child viewport */

if (use->x.unit == SVGLength::PERCENT) {

use->x.computed = use->x.value * ictx->viewport.width();

}

if (use->y.unit == SVGLength::PERCENT) {

use->y.computed = use->y.value * ictx->viewport.height();

}

if (use->width.unit == SVGLength::PERCENT) {

use->width.computed = use->width.value * ictx->viewport.width();

}

if (use->height.unit == SVGLength::PERCENT) {

use->height.computed = use->height.value * ictx->viewport.height();

}

cctx.viewport = Geom::Rect::from_xywh(0, 0, use->width.computed, use->height.computed);

cctx.i2vp = Geom::identity();

flags&=~SP_OBJECT_USER_MODIFIED_FLAG_B;

if (use->child) {

g_object_ref(G_OBJECT(use->child));

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

if (SP_IS_ITEM(use->child)) {

SPItem const &chi = *SP_ITEM(use->child);

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

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

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

} else {

use->child->updateDisplay(ctx, flags);

}

}

g_object_unref(G_OBJECT(use->child));

}

/* As last step set additional transform of arena group */

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

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

Geom::Affine t(Geom::Translate(use->x.computed, use->y.computed));

g->setChildTransform(t);

}

}

static void

sp_use_modified(SPObject *object, guint flags)

{

SPUse *use_obj = SP_USE(object);

if (flags & SP_OBJECT_MODIFIED_FLAG) {

flags |= SP_OBJECT_PARENT_MODIFIED_FLAG;

}

flags &= SP_OBJECT_MODIFIED_CASCADE;

if (flags & SP_OBJECT_STYLE_MODIFIED_FLAG) {

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

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

g->setStyle(object->style);

}

}

SPObject *child = use_obj->child;

if (child) {

g_object_ref(G_OBJECT(child));

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

child->emitModified(flags);

}

g_object_unref(G_OBJECT(child));

}

}

SPItem *sp_use_unlink(SPUse *use)

{

if (!use) {

return NULL;

}

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

if (!repr) {

return NULL;

}

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

SPDocument *document = use->document;

Inkscape::XML::Document *xml_doc = document->getReprDoc();

// Track the ultimate source of a chain of uses.

SPItem *orig = sp_use_root(use);

if (!orig) {

return NULL;

}

// Calculate the accumulated transform, starting from the original.

Geom::Affine t = sp_use_get_root_transform(use);

Inkscape::XML::Node *copy = NULL;

if (SP_IS_SYMBOL(orig)) { // make a group, copy children

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

for (Inkscape::XML::Node *child = orig->getRepr()->firstChild() ; child != NULL; child = child->next()) {

Inkscape::XML::Node *newchild = child->duplicate(xml_doc);

copy->appendChild(newchild);

}

} else { // just copy

copy = orig->getRepr()->duplicate(xml_doc);

}

// Add the duplicate repr just after the existing one.

parent->addChild(copy, repr);

// Retrieve the SPItem of the resulting repr.

SPObject *unlinked = document->getObjectByRepr(copy);

// Merge style from the use.

SPStyle *unli_sty = unlinked->style;

SPStyle const *use_sty = use->style;

sp_style_merge_from_dying_parent(unli_sty, use_sty);

sp_style_merge_from_parent(unli_sty, unlinked->parent->style);

unlinked->updateRepr();

// Hold onto our SPObject and repr for now.

sp_object_ref(use, NULL);

Inkscape::GC::anchor(repr);

// Remove ourselves, not propagating delete events to avoid a

// chain-reaction with other elements that might reference us.

use->deleteObject(false);

// Give the copy our old id and let go of our old repr.

copy->setAttribute("id", repr->attribute("id"));

Inkscape::GC::release(repr);

// Remove tiled clone attrs.

copy->setAttribute("inkscape:tiled-clone-of", NULL);

copy->setAttribute("inkscape:tile-w", NULL);

copy->setAttribute("inkscape:tile-h", NULL);

copy->setAttribute("inkscape:tile-cx", NULL);

copy->setAttribute("inkscape:tile-cy", NULL);

// Establish the succession and let go of our object.

use->setSuccessor(unlinked);

sp_object_unref(use, NULL);

SPItem *item = SP_ITEM(unlinked);

// Set the accummulated transform.

{

Geom::Affine nomove(Geom::identity());

// Advertise ourselves as not moving.

item->doWriteTransform(item->getRepr(), t, &nomove);

}

return item;

}

SPItem *sp_use_get_original(SPUse *use)

{

SPItem *ref = NULL;

if (use){

if (use->ref){

ref = use->ref->getObject();

}

}

return ref;

}

static void

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

{

g_assert (item != NULL);

g_assert (SP_IS_ITEM(item));

g_assert (SP_IS_USE(item));

SPUse *use = SP_USE(item);

SPItem *root = sp_use_root(use);

if (!root)

return;

SPItemClass const &item_class = *(SPItemClass const *) G_OBJECT_GET_CLASS(root);

if (item_class.snappoints) {

item_class.snappoints(root, p, snapprefs);

}

}