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/*
* A class for handling connector endpoint movement and libavoid interaction.
*
* Authors:
* Peter Moulder <pmoulder@mail.csse.monash.edu.au>
* Michael Wybrow <mjwybrow@users.sourceforge.net>
* Abhishek Sharma
*
* * Copyright (C) 2004-2005 Monash University
*
* Released under GNU GPL, read the file 'COPYING' for more information
*/
#include <cstring>
#include <string>
#include <iostream>
#include <glibmm/stringutils.h>
#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)
: _path(owner)
, _connRef(NULL)
, _connType(SP_CONNECTOR_NOAVOID)
, _connCurvature(0.0)
, _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;
}
}
void
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();
}
// If the document is being destroyed then the router instance
// and the ConnRefs will have been destroyed with it.
const bool routerInstanceExists = (_path->document->router != NULL);
if (_connRef && routerInstanceExists) {
_connRef->removeFromGraph();
delete _connRef;
}
_connRef = NULL;
_transformed_connection.disconnect();
}
void
sp_conn_end_pair_build(SPObject *object)
{
object->readAttr( "inkscape:connector-type" );
object->readAttr( "inkscape:connection-start" );
object->readAttr( "inkscape:connection-end" );
object->readAttr( "inkscape:connector-curvature" );
}
static void
avoid_conn_transformed(Geom::Affine const */*mp*/, SPItem *moved_item)
{
SPPath *path = SP_PATH(moved_item);
if (path->connEndPair.isAutoRoutingConn()) {
path->connEndPair.tellLibavoidNewEndpoints();
}
}
void
SPConnEndPair::setAttr(unsigned const key, gchar const *const value)
{
switch (key)
{
case SP_ATTR_CONNECTOR_TYPE:
if (value && (strcmp(value, "polyline") == 0 || strcmp(value, "orthogonal") == 0)) {
int newconnType = strcmp(value, "polyline") ? SP_CONNECTOR_ORTHOGONAL : SP_CONNECTOR_POLYLINE;
if (!_connRef)
{
_connType = newconnType;
Avoid::Router *router = _path->document->router;
GQuark itemID = g_quark_from_string(_path->getId());
_connRef = new Avoid::ConnRef(router, itemID);
switch (newconnType)
{
case SP_CONNECTOR_POLYLINE:
_connRef->setRoutingType(Avoid::ConnType_PolyLine);
break;
case SP_CONNECTOR_ORTHOGONAL:
_connRef->setRoutingType(Avoid::ConnType_Orthogonal);
}
_transformed_connection = _path->connectTransformed(
sigc::ptr_fun(&avoid_conn_transformed));
}
else
if (newconnType != _connType)
{
_connType = newconnType;
switch (newconnType)
{
case SP_CONNECTOR_POLYLINE:
_connRef->setRoutingType(Avoid::ConnType_PolyLine);
break;
case SP_CONNECTOR_ORTHOGONAL:
_connRef->setRoutingType(Avoid::ConnType_Orthogonal);
}
sp_conn_reroute_path(_path);
}
}
else {
_connType = SP_CONNECTOR_NOAVOID;
if (_connRef) {
_connRef->removeFromGraph();
delete _connRef;
_connRef = NULL;
_transformed_connection.disconnect();
}
}
break;
case SP_ATTR_CONNECTOR_CURVATURE:
if (value) {
_connCurvature = g_strtod(value, NULL);
if (_connRef && _connRef->isInitialised()) {
// Redraw the connector, but only if it has been initialised.
sp_conn_reroute_path(_path);
}
}
break;
case SP_ATTR_CONNECTION_START:
case SP_ATTR_CONNECTION_END:
this->_connEnd[(key == SP_ATTR_CONNECTION_START ? 0 : 1)]->setAttacherHref(value, _path);
break;
}
}
void
SPConnEndPair::writeRepr(Inkscape::XML::Node *const repr) const
{
char const * const attr_strs[] = {"inkscape:connection-start", "inkscape:connection-end"};
for (unsigned handle_ix = 0; handle_ix < 2; ++handle_ix) {
const Inkscape::URI* U = this->_connEnd[handle_ix]->ref.getURI();
if (U) {
gchar *str = U->toString();
repr->setAttribute(attr_strs[handle_ix], str);
g_free(str);
}
}
repr->setAttribute("inkscape:connector-curvature", Glib::Ascii::dtostr(_connCurvature).c_str());
if (_connType == SP_CONNECTOR_POLYLINE || _connType == SP_CONNECTOR_ORTHOGONAL)
repr->setAttribute("inkscape:connector-type", _connType == SP_CONNECTOR_POLYLINE ? "polyline" : "orthogonal" );
}
void
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])->getItemCount() == 0) {
// This group is empty, so detach.
sp_conn_end_detach(_path, h);
h2attItem[h] = NULL;
}
}
}
}
void SPConnEndPair::getEndpoints(Geom::Point endPts[]) const
{
SPCurve const *curve = _path->get_curve_reference();
SPItem *h2attItem[2] = {0};
getAttachedItems(h2attItem);
Geom::Affine i2d = _path->i2doc_affine();
for (unsigned h = 0; h < 2; ++h) {
if ( h2attItem[h] ) {
g_assert(h2attItem[h]->avoidRef);
endPts[h] = h2attItem[h]->avoidRef->getConnectionPointPos();
}
else if (!curve->is_empty())
{
if (h == 0) {
endPts[h] = *(curve->first_point())*i2d;
}
else {
endPts[h] = *(curve->last_point())*i2d;
}
}
}
}
gdouble
SPConnEndPair::getCurvature(void) const {
return _connCurvature;
}
SPConnEnd**
SPConnEndPair::getConnEnds(void)
{
return _connEnd;
}
bool
SPConnEndPair::isOrthogonal(void) const {
return _connType == SP_CONNECTOR_ORTHOGONAL;
}
static void redrawConnectorCallback(void *ptr)
{
SPPath *path = SP_PATH(ptr);
if (path->document == NULL) {
// This can happen when the document is being destroyed.
return;
}
sp_conn_redraw_path(path);
}
void
SPConnEndPair::rerouteFromManipulation(void)
{
sp_conn_reroute_path_immediate(_path);
}
// Called from sp_path_update to initialise the endpoints.
void
SPConnEndPair::update(void)
{
if (_connType != SP_CONNECTOR_NOAVOID) {
g_assert(_connRef != NULL);
if (!(_connRef->isInitialised())) {
Geom::Point endPt[2];
getEndpoints(endPt);
Avoid::Point src(endPt[0][Geom::X], endPt[0][Geom::Y]);
Avoid::Point dst(endPt[1][Geom::X], endPt[1][Geom::Y]);
_connRef->setEndpoints(src, dst);
_connRef->setCallback(&redrawConnectorCallback, _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);
}
}
bool
SPConnEndPair::isAutoRoutingConn(void)
{
if (_connType != SP_CONNECTOR_NOAVOID) {
return true;
}
return false;
}
void
SPConnEndPair::makePathInvalid(void)
{
_connRef->makePathInvalid();
}
// Redraws the curve along the recalculated route
// Straight or curved
void recreateCurve(SPCurve *curve, Avoid::ConnRef *connRef, const gdouble curvature)
{
bool straight = curvature<1e-3;
Avoid::PolyLine route = connRef->displayRoute();
if (!straight)
route = route.curvedPolyline(curvature);
connRef->calcRouteDist();
curve->reset();
curve->moveto( Geom::Point(route.ps[0].x, route.ps[0].y) );
int pn = route.size();
for (int i = 1; i < pn; ++i) {
Geom::Point p(route.ps[i].x, route.ps[i].y);
if (straight) {
curve->lineto( p );
}
else {
switch (route.ts[i]) {
case 'M':
curve->moveto( p );
break;
case 'L':
curve->lineto( p );
break;
case 'C':
g_assert( i+2<pn );
curve->curveto( p, Geom::Point(route.ps[i+1].x, route.ps[i+1].y),
Geom::Point(route.ps[i+2].x, route.ps[i+2].y) );
i+=2;
break;
}
}
}
}
void
SPConnEndPair::tellLibavoidNewEndpoints(const bool processTransaction)
{
if (!isAutoRoutingConn()) {
// Do nothing
return;
}
makePathInvalid();
Geom::Point endPt[2];
getEndpoints(endPt);
Avoid::Point src(endPt[0][Geom::X], endPt[0][Geom::Y]);
Avoid::Point dst(endPt[1][Geom::X], endPt[1][Geom::Y]);
_connRef->setEndpoints(src, dst);
if (processTransaction)
{
_connRef->router()->processTransaction();
}
return;
}
bool
SPConnEndPair::reroutePathFromLibavoid(void)
{
if (!isAutoRoutingConn()) {
// Do nothing
return false;
}
SPCurve *curve = _path->get_curve();
recreateCurve( curve, _connRef, _connCurvature );
Geom::Affine doc2item = _path->i2doc_affine().inverse();
curve->transform(doc2item);
return true;
}
/*
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 :
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