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/*
* vim: ts=4 sw=4 et tw=0 wm=0
*
* libavoid - Fast, Incremental, Object-avoiding Line Router
*
* Copyright (C) 2010-2011 Monash University
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
* See the file LICENSE.LGPL distributed with the library.
*
* Licensees holding a valid commercial license may use this file in
* accordance with the commercial license agreement provided with the
* library.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
*
* Author(s): Michael Wybrow
*/
#include <cstdlib>
#include <algorithm>
#include "libavoid/junction.h"
#include "libavoid/router.h"
#include "libavoid/connectionpin.h"
#include "libavoid/debug.h"
namespace Avoid {
JunctionRef::JunctionRef(Router *router, Point position, const unsigned int id)
: Obstacle(router, makeRectangle(router, position), id),
m_position(position),
m_recommended_position(position),
m_position_fixed(false)
{
// For Junctions we use a single non-exclusive pin.
ShapeConnectionPin *pin = new Avoid::ShapeConnectionPin(this,
Avoid::CONNECTIONPIN_CENTRE, ConnDirAll);
pin->setExclusive(false);
m_connection_pins.insert(pin);
m_router->addJunction(this);
}
JunctionRef::~JunctionRef()
{
if (m_router->m_currently_calling_destructors == false)
{
err_printf("ERROR: JunctionRef::~JunctionRef() shouldn't be called directly.\n");
err_printf(" It is owned by the router. Call Router::deleteJunction() instead.\n");
abort();
}
}
Rectangle JunctionRef::makeRectangle(Router *router, const Point& position)
{
COLA_ASSERT(router);
// A suitably small value.
double nudgeDist = router->routingParameter(idealNudgingDistance);
nudgeDist = std::min(1.0, nudgeDist);
Point low = position;
low.x -= nudgeDist;
low.y -= nudgeDist;
Point high = position;
high.x += nudgeDist;
high.y += nudgeDist;
return Rectangle(low, high);
}
void JunctionRef::setPositionFixed(bool fixed)
{
m_position_fixed = fixed;
m_router->registerSettingsChange();
}
bool JunctionRef::positionFixed(void) const
{
return m_position_fixed;
}
void JunctionRef::preferOrthogonalDimension(const size_t dim)
{
const double smallPenalty = 1.0;
for (ShapeConnectionPinSet::iterator curr =
m_connection_pins.begin(); curr != m_connection_pins.end(); ++curr)
{
ShapeConnectionPin *pin = *curr;
if (dim == YDIM)
{
if (pin->directions() & (ConnDirLeft | ConnDirRight))
{
pin->setConnectionCost(smallPenalty);
}
}
else if (dim == XDIM)
{
if (pin->directions() & (ConnDirUp | ConnDirDown))
{
pin->setConnectionCost(smallPenalty);
}
}
}
}
Point JunctionRef::position(void) const
{
return m_position;
}
void JunctionRef::setPosition(const Point& position)
{
m_position = position;
m_recommended_position = position;
m_polygon = makeRectangle(m_router, m_position);
setNewPoly(m_polygon);
}
Point JunctionRef::recommendedPosition(void) const
{
return m_recommended_position;
}
void JunctionRef::setRecommendedPosition(const Point& position)
{
m_recommended_position = position;
}
void JunctionRef::outputCode(FILE *fp) const
{
fprintf(fp, " JunctionRef *junctionRef%u = new JunctionRef(router, "
"Point(%g, %g), %u);\n", id(), position().x, position().y, id());
if (m_position_fixed)
{
fprintf(fp, " junctionRef%u->setPositionFixed(true);\n", id());
}
fprintf(fp, " /*\n");
fprintf(fp, " // This may be useful if junction pins are modified.\n");
for (ShapeConnectionPinSet::const_iterator curr =
m_connection_pins.begin();
curr != m_connection_pins.end(); ++curr)
{
(*curr)->outputCode(fp);
}
fprintf(fp, " */\n");
fprintf(fp, "\n");
}
void JunctionRef::moveAttachedConns(const Point& newPosition)
{
// Update positions of attached connector ends.
for (std::set<ConnEnd *>::iterator curr = m_following_conns.begin();
curr != m_following_conns.end(); ++curr)
{
ConnEnd *connEnd = *curr;
COLA_ASSERT(connEnd->m_conn_ref != nullptr);
m_router->modifyConnector(connEnd->m_conn_ref, connEnd->endpointType(),
*connEnd);
}
for (ShapeConnectionPinSet::iterator curr =
m_connection_pins.begin(); curr != m_connection_pins.end(); ++curr)
{
ShapeConnectionPin *pin = *curr;
pin->updatePosition(newPosition);
}
}
ConnRef *JunctionRef::removeJunctionAndMergeConnectors(void)
{
if (m_following_conns.size() != 2)
{
return nullptr;
}
std::set<ConnEnd *>::iterator curr = m_following_conns.begin();
ConnEnd *connEnd1 = *curr;
++curr;
ConnEnd *connEnd2 = *curr;
COLA_ASSERT(connEnd2->m_conn_ref != nullptr);
COLA_ASSERT(connEnd1->m_conn_ref != nullptr);
// The second conn will be the one we will delete.
ConnRef *conn2 = connEnd2->m_conn_ref;
// Determine its endpoint that is not attached to the junction.
ConnEnd *connEnd2Other = (conn2->m_src_connend == connEnd2) ?
conn2->m_dst_connend : conn2->m_src_connend;
if (connEnd2Other == nullptr)
{
// If it doesn't have a valid other endpoint, then ignore.
return nullptr;
}
// Modify the first connector's junction endpoint to connect to the
// other end of the second connector.
m_router->modifyConnector(connEnd1->m_conn_ref,
connEnd1->endpointType(), *connEnd2Other);
// Delete the second connector.
m_router->deleteConnector(conn2);
// Remove the junction from the router scene. It should get deleted later.
m_router->deleteJunction(this);
// Return the first (i.e. merged) connector.
return connEnd1->m_conn_ref;
}
//============================================================================
}
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