#include <cstring>

#include <string>

#include "attributes.h"

#include "sp-conn-end.h"

#include "uri.h"

#include "display/curve.h"

#include "xml/repr.h"

#include "sp-path.h"

#include "libavoid/vertices.h"

#include "libavoid/router.h"

#include "document.h"

#include "sp-item-group.h"

SPConnEndPair::SPConnEndPair(SPPath *const owner)

: _invalid_path_connection()

, _path(owner)

, _connRef(NULL)

, _connType(SP_CONNECTOR_NOAVOID)

, _transformed_connection()

{

for (unsigned handle_ix = 0; handle_ix <= 1; ++handle_ix) {

this->_connEnd[handle_ix] = new SPConnEnd(SP_OBJECT(owner));

this->_connEnd[handle_ix]->_changed_connection

= this->_connEnd[handle_ix]->ref.changedSignal()

.connect(sigc::bind(sigc::ptr_fun(sp_conn_end_href_changed),

this->_connEnd[handle_ix], owner, handle_ix));

}

}

SPConnEndPair::~SPConnEndPair()

{

for (unsigned handle_ix = 0; handle_ix < 2; ++handle_ix) {

delete this->_connEnd[handle_ix];

this->_connEnd[handle_ix] = NULL;

}

if (_connRef) {

_connRef->removeFromGraph();

delete _connRef;

_connRef = NULL;

}

_invalid_path_connection.disconnect();

_transformed_connection.disconnect();

}

SPConnEndPair::release()

{

for (unsigned handle_ix = 0; handle_ix < 2; ++handle_ix) {

this->_connEnd[handle_ix]->_changed_connection.disconnect();

this->_connEnd[handle_ix]->_delete_connection.disconnect();

this->_connEnd[handle_ix]->_transformed_connection.disconnect();

g_free(this->_connEnd[handle_ix]->href);

this->_connEnd[handle_ix]->href = NULL;

this->_connEnd[handle_ix]->ref.detach();

}

}

sp_conn_end_pair_build(SPObject *object)

{

sp_object_read_attr(object, "inkscape:connector-type");

sp_object_read_attr(object, "inkscape:connection-start");

sp_object_read_attr(object, "inkscape:connection-end");

}

static void

avoid_conn_move(NR::Matrix const */*mp*/, SPItem *moved_item)

{

// Reroute connector

SPPath *path = SP_PATH(moved_item);

path->connEndPair.makePathInvalid();

sp_conn_adjust_invalid_path(path);

}

SPConnEndPair::setAttr(unsigned const key, gchar const *const value)

{

if (key == SP_ATTR_CONNECTOR_TYPE) {

if (value && (strcmp(value, "polyline") == 0)) {

_connType = SP_CONNECTOR_POLYLINE;

Avoid::Router *router = _path->document->router;

GQuark itemID = g_quark_from_string(SP_OBJECT(_path)->id);

_connRef = new Avoid::ConnRef(router, itemID);

_invalid_path_connection = connectInvalidPath(

sigc::ptr_fun(&sp_conn_adjust_invalid_path));

_transformed_connection = _path->connectTransformed(

sigc::ptr_fun(&avoid_conn_move));

}

else {

_connType = SP_CONNECTOR_NOAVOID;

if (_connRef) {

_connRef->removeFromGraph();

delete _connRef;

_connRef = NULL;

_invalid_path_connection.disconnect();

_transformed_connection.disconnect();

}

}

return;

}

unsigned const handle_ix = key - SP_ATTR_CONNECTION_START;

g_assert( handle_ix <= 1 );

this->_connEnd[handle_ix]->setAttacherHref(value);

}

SPConnEndPair::writeRepr(Inkscape::XML::Node *const repr) const

{

for (unsigned handle_ix = 0; handle_ix < 2; ++handle_ix) {

if (this->_connEnd[handle_ix]->ref.getURI()) {

char const * const attr_strs[] = {"inkscape:connection-start",

"inkscape:connection-end"};

gchar *uri_string = this->_connEnd[handle_ix]->ref.getURI()->toString();

repr->setAttribute(attr_strs[handle_ix], uri_string);

g_free(uri_string);

}

}

}

SPConnEndPair::getAttachedItems(SPItem *h2attItem[2]) const {

for (unsigned h = 0; h < 2; ++h) {

h2attItem[h] = this->_connEnd[h]->ref.getObject();

// Deal with the case of the attached object being an empty group.

// A group containing no items does not have a valid bbox, so

// causes problems for the auto-routing code. Also, since such a

// group no longer has an onscreen representation and can only be

// selected through the XML editor, it makes sense just to detach

// connectors from them.

if (SP_IS_GROUP(h2attItem[h])) {

if (SP_GROUP(h2attItem[h])->group->getItemCount() == 0) {

// This group is empty, so detach.

sp_conn_end_detach(_path, h);

h2attItem[h] = NULL;

}

}

}

}

SPConnEndPair::getEndpoints(NR::Point endPts[]) const {

SPCurve *curve = _path->curve;

SPItem *h2attItem[2];

getAttachedItems(h2attItem);

for (unsigned h = 0; h < 2; ++h) {

if ( h2attItem[h] ) {

boost::optional<NR::Rect> bbox = h2attItem[h]->getBounds(from_2geom(sp_item_i2doc_affine(h2attItem[h])));

if (bbox) {

endPts[h] = bbox->midpoint();

} else {

// FIXME

endPts[h] = NR::Point(0, 0);

}

}

else

{

if (h == 0) {

endPts[h] = curve->first_point();

}

else {

endPts[h] = curve->last_point();

}

}

}

}

sigc::connection

SPConnEndPair::connectInvalidPath(sigc::slot<void, SPPath *> slot)

{

return _invalid_path_signal.connect(slot);

}

static void emitPathInvalidationNotification(void *ptr)

{

// We emit a signal here rather than just calling the reroute function

// since this allows all the movement action computation to happen,

// then all connectors (that require it) will be rerouted. Otherwise,

// one connector could get rerouted several times as a result of

// dragging a couple of shapes.

SPPath *path = SP_PATH(ptr);

path->connEndPair._invalid_path_signal.emit(path);

}

SPConnEndPair::rerouteFromManipulation(void)

{

_connRef->makePathInvalid();

sp_conn_adjust_path(_path);

}

SPConnEndPair::reroute(void)

{

sp_conn_adjust_path(_path);

}

SPConnEndPair::update(void)

{

if (_connType != SP_CONNECTOR_NOAVOID) {

g_assert(_connRef != NULL);

if (!(_connRef->isInitialised())) {

NR::Point endPt[2];

getEndpoints(endPt);

Avoid::Point src(endPt[0][NR::X], endPt[0][NR::Y]);

Avoid::Point dst(endPt[1][NR::X], endPt[1][NR::Y]);

_connRef->lateSetup(src, dst);

_connRef->setCallback(&emitPathInvalidationNotification, _path);

}

// Store the ID of the objects attached to the connector.

storeIds();

}

}

void SPConnEndPair::storeIds(void)

{

if (_connEnd[0]->href) {

// href begins with a '#' which we don't want.

const char *startId = _connEnd[0]->href + 1;

GQuark itemId = g_quark_from_string(startId);

_connRef->setEndPointId(Avoid::VertID::src, itemId);

}

else {

_connRef->setEndPointId(Avoid::VertID::src, 0);

}

if (_connEnd[1]->href) {

// href begins with a '#' which we don't want.

const char *endId = _connEnd[1]->href + 1;

GQuark itemId = g_quark_from_string(endId);

_connRef->setEndPointId(Avoid::VertID::tar, itemId);

}

else {

_connRef->setEndPointId(Avoid::VertID::tar, 0);

}

}

SPConnEndPair::isAutoRoutingConn(void)

{

if (_connType != SP_CONNECTOR_NOAVOID) {

return true;

}

return false;

}

SPConnEndPair::makePathInvalid(void)

{

_connRef->makePathInvalid();

}

SPConnEndPair::reroutePath(void)

{

if (!isAutoRoutingConn()) {

// Do nothing

return;

}

SPCurve *curve = _path->curve;

NR::Point endPt[2];

getEndpoints(endPt);

Avoid::Point src(endPt[0][NR::X], endPt[0][NR::Y]);

Avoid::Point dst(endPt[1][NR::X], endPt[1][NR::Y]);

_connRef->updateEndPoint(Avoid::VertID::src, src);

_connRef->updateEndPoint(Avoid::VertID::tar, dst);

_connRef->generatePath(src, dst);

Avoid::PolyLine route = _connRef->route();

_connRef->calcRouteDist();

curve->reset();

curve->moveto(endPt[0]);

for (int i = 1; i < route.pn; ++i) {

NR::Point p(route.ps[i].x, route.ps[i].y);

curve->lineto(p);

}

}