/************************************************************************
 ************************************************************************
    FAUST compiler
    Copyright (C) 2003-2018 GRAME, Centre National de Creation Musicale
    ---------------------------------------------------------------------
    This program 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.

    This program 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.  See the
    GNU Lesser General Public License for more details.

    You should have received a copy of the GNU Lesser General Public License
    along with this program; if not, write to the Free Software
    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 ************************************************************************
 ************************************************************************/

#include "schema.h"

using namespace std;

void collector::computeVisibleTraits()
{
    bool modified;

    do {
        modified = false;
        for (set<trait>::iterator p = fTraits.begin(); p != fTraits.end(); p++) {
            if (fWithInput.count(*p) == 0) {  // not connected to a real output
                if (fOutputs.count(p->start) > 0) {
                    fWithInput.insert(*p);    // the cable is connected to a real output
                    fOutputs.insert(p->end);  // end become a real output too
                    modified = true;
                }
            }
            if (fWithOutput.count(*p) == 0) {  // not connected to a real input
                if (fInputs.count(p->end) > 0) {
                    fWithOutput.insert(*p);    // the cable is connected to a real input
                    fInputs.insert(p->start);  // start become a real input too
                    modified = true;
                }
            }
        }
    } while (modified);
}

bool collector::isVisible(const trait& t)
{
    return fWithInput.count(t) && fWithOutput.count(t);
}

void collector::draw(device& dev)
{
    computeVisibleTraits();
    for (set<trait>::iterator p = fTraits.begin(); p != fTraits.end(); p++) {
        if (isVisible(*p)) p->draw(dev);
    }
}
