File indexing completed on 2024-12-08 08:10:38

 /***************************************************************************
  *   Copyright (C) 2003-2004 by David Saxton                               *
  *   david@bluehaze.org                                                    *
  *                                                                         *
  *   This program is free software; you can redistribute it and/or modify  *
  *   it under the terms of the GNU General Public License as published by  *
  *   the Free Software Foundation; either version 2 of the License, or     *
  *   (at your option) any later version.                                   *
  ***************************************************************************/
 
 #include "conrouter.h"
 #include "icndocument.h"
 #include "utils.h"
 
 #include <cassert>
 #include <cmath>
 #include <cstdlib>
 
 #include <ktechlab_debug.h>
 
 ConRouter::ConRouter(ICNDocument *cv)
 {
     p_icnDocument = cv;
     m_lcx = m_lcy = 0;
 }
 
 ConRouter::~ConRouter()
 {
 }
 
 QPointList ConRouter::pointList(bool reverse) const
 {
     QPointList pointList;
 
     if (reverse) {
         bool notDone = m_cellPointList.size() > 0;
         for (QPointList::const_iterator it = (--m_cellPointList.constEnd()); notDone; --it) {
             pointList.append(toCanvas(&*it));
             if (it == m_cellPointList.begin())
                 notDone = false;
         }
     } else {
         const QPointList::const_iterator end = m_cellPointList.end();
         for (QPointList::const_iterator it = m_cellPointList.begin(); it != end; ++it) {
             pointList.append(toCanvas(&*it));
         }
     }
 
     return pointList;
 }
 
 QPointListList ConRouter::splitPoints(const QPoint &pos) const
 {
     const QPoint split = fromCanvas(&pos);
 
     QList<QPointList> list;
 
     // Check that the point is in the connector points, and not at the start or end
     bool found = false;
     QPointList::const_iterator end = m_cellPointList.end();
 
     double dl[] = {0.0, 1.1, 1.5}; // sqrt(2) < 1.5 < sqrt(5)
     for (unsigned i = 0; (i < 3) && !found; ++i) {
         for (QPointList::const_iterator it = m_cellPointList.begin(); it != end && !found; ++it) {
             QPointList::const_iterator fromLast = --m_cellPointList.constEnd();
             if (qpoint_distance(*it, split) <= dl[i] && it != m_cellPointList.begin() && it != fromLast) // m_cellPointList.fromLast() )
                 found = true;
         }
     }
 
     QPointList first;
     QPointList second;
 
     if (!found) {
         qCWarning(KTL_LOG) << "ConRouter::splitConnectorPoints: Could not find point (" << pos.x() << ", " << pos.y() << ") in connector points";
         qCWarning(KTL_LOG) << "ConRouter::splitConnectorPoints: Returning generic list";
 
         first.append(toCanvas(m_cellPointList.first()));
         first.append(pos);
         second.append(pos);
         second.append(toCanvas(m_cellPointList.last()));
 
         list.append(first);
         list.append(second);
 
         return list;
     }
 
     // Now add the points to the two lists
     bool gotToSplit = false;
     for (QPointList::const_iterator it = m_cellPointList.begin(); it != end; ++it) {
         QPoint canvasPoint = toCanvas(&*it);
         if (*it == split) {
             gotToSplit = true;
             first.append(canvasPoint);
             second.prepend(canvasPoint);
         } else if (!gotToSplit) {
             first.append(canvasPoint);
         } else /*if (gotToSplit)*/
         {
             second.append(canvasPoint);
         }
     }
 
     list.append(first);
     list.append(second);
 
     return list;
 }
 
 QPointListList ConRouter::dividePoints(uint n) const
 {
     // Divide the points up into n pieces...
 
     QPointList points = m_cellPointList;
     assert(n != 0);
     if (points.size() == 0) {
         points += QPoint(toCanvas(m_lcx), toCanvas(m_lcy));
     }
 
     const float avgLength = float(points.size() - 1) / float(n);
 
     QPointListList pll;
     for (uint i = 0; i < n; ++i) {
         QPointList pl;
         // Get the points between (pos) and (pos+avgLength)
         const int endPos = roundDouble(avgLength * (i + 1));
         const int startPos = roundDouble(avgLength * i);
         // const QPointList::iterator end = ++points.at(endPos);
         // for ( QPointList::iterator it = points.at(startPos); it != end; ++it )
         for (int pos = startPos; pos < endPos; ++pos) {
             // pl += toCanvas(*it);
             pl += toCanvas(points.at(pos));
         }
         pll += pl;
     }
     return pll;
 }
 
 void ConRouter::checkACell(int x, int y, Cell *prev, int prevX, int prevY, int nextScore)
 {
     //  if ( !p_icnDocument->isValidCellReference(x,y) ) return;
     if (!cellsPtr->haveCell(x, y))
         return;
 
     Cell *c = &cellsPtr->cell(x, y);
     if (c->permanent)
         return;
 
     int newScore = nextScore + c->CIpenalty + c->Cpenalty;
 
     // Check for changing direction
     if (x != prevX && prev->prevX == prevX)
         newScore += 5;
     else if (y != prevY && prev->prevY == prevY)
         newScore += 5;
 
     if (c->bestScore < newScore)
         return;
 
     // We only want to change the previous cell if the score is different,
     // or the score is the same but this cell allows the connector
     // to travel in the same direction
 
     if (c->bestScore == newScore && x != prevX && y != prevY)
         return;
 
     c->bestScore = newScore;
     c->prevX = prevX;
     c->prevY = prevY;
 
     if (!c->addedToLabels) {
         c->addedToLabels = true;
         Point point;
         point.x = x;
         point.y = y;
         point.prevX = prevX;
         point.prevY = prevY;
         TempLabelMap::iterator it = tempLabels.insert(std::make_pair(newScore, point));
         c->point = &it->second;
     } else {
         c->point->prevX = prevX;
         c->point->prevY = prevY;
     }
 }
 
 void ConRouter::checkCell(int x, int y)
 {
     Cell *c = &cellsPtr->cell(x, y);
 
     c->permanent = true;
     int nextScore = c->bestScore + 1;
 
     // Check the surrounding cells (up, left, right, down)
     checkACell(x, y - 1, c, x, y, nextScore);
     checkACell(x - 1, y, c, x, y, nextScore);
     checkACell(x + 1, y, c, x, y, nextScore);
     checkACell(x, y + 1, c, x, y, nextScore);
 }
 
 bool ConRouter::needsRouting(int sx, int sy, int ex, int ey) const
 {
     if (m_cellPointList.size() < 2) {
         // Better be on the safe side...
         return true;
     }
 
     const int scx = fromCanvas(sx);
     const int scy = fromCanvas(sy);
     const int ecx = fromCanvas(ex);
     const int ecy = fromCanvas(ey);
 
     const int psx = m_cellPointList.first().x();
     const int psy = m_cellPointList.first().y();
     const int pex = m_cellPointList.last().x();
     const int pey = m_cellPointList.last().y();
 
     return (psx != scx || psy != scy || pex != ecx || pey != ecy) && (pex != scx || pey != scy || psx != ecx || psy != ecy);
 }
 
 void ConRouter::setRoutePoints(const QPointList &pointList)
 {
     m_cellPointList = pointList;
     removeDuplicatePoints();
 }
 
 void ConRouter::setPoints(const QPointList &pointList, bool reverse)
 {
     if (pointList.size() == 0)
         return;
 
     QPointList cellPointList;
 
     QPoint prevCellPoint = fromCanvas(*pointList.begin());
     cellPointList.append(prevCellPoint);
     const QPointList::const_iterator end = pointList.end();
     for (QPointList::const_iterator it = pointList.begin(); it != end; ++it) {
         QPoint cellPoint = fromCanvas(*it);
 
         while (prevCellPoint != cellPoint) {
             cellPointList.append(prevCellPoint);
 
             if (prevCellPoint.x() < cellPoint.x())
                 prevCellPoint.setX(prevCellPoint.x() + 1);
             else if (prevCellPoint.x() > cellPoint.x())
                 prevCellPoint.setX(prevCellPoint.x() - 1);
             if (prevCellPoint.y() < cellPoint.y())
                 prevCellPoint.setY(prevCellPoint.y() + 1);
             else if (prevCellPoint.y() > cellPoint.y())
                 prevCellPoint.setY(prevCellPoint.y() - 1);
         };
 
         prevCellPoint = cellPoint;
     }
     cellPointList.append(prevCellPoint);
 
     if (reverse) {
         m_cellPointList.clear();
         const QPointList::iterator begin = cellPointList.begin();
         for (QPointList::iterator it = --cellPointList.end(); it != begin; --it) {
             m_cellPointList += *it;
         }
         m_cellPointList += *begin;
     } else {
         m_cellPointList = cellPointList;
     }
 
     removeDuplicatePoints();
 }
 
 void ConRouter::translateRoute(int dx, int dy)
 {
     if (dx == 0 && dy == 0)
         return;
 
     m_lcx += dx;
     m_lcy += dy;
 
     //  const QPoint ds = QPoint( fromCanvas(dx), fromCanvas(dy) );
     const QPoint ds = QPoint(dx / 8, dy / 8);
 
     QPointList::iterator end = m_cellPointList.end();
     for (QPointList::iterator it = m_cellPointList.begin(); it != end; ++it) {
         (*it) += ds;
     }
 
     removeDuplicatePoints();
 }
 
 void ConRouter::mapRoute(int sx, int sy, int ex, int ey)
 {
     const int scx = fromCanvas(sx);
     const int scy = fromCanvas(sy);
     const int ecx = fromCanvas(ex);
     const int ecy = fromCanvas(ey);
 
     cellsPtr = p_icnDocument->cells();
 
     if (!cellsPtr->haveCell(scx, scy) || !cellsPtr->haveCell(ecx, ecy)) {
         qCDebug(KTL_LOG) << "cellPtr doesn't have cells, giving up";
         return;
     }
 
     m_cellPointList.clear();
     m_lcx = ecx;
     m_lcy = ecy;
 
     // First, lets try some common connector routes (which will not necesssarily
     // be shortest, but they will be neat, and cut down on overall CPU usage)
     // If that fails, we will resort to a shortest-route algorithm to find an
     // appropriate route.
 
     // Connector configuration: Line
     {
         bool ok = checkLineRoute(scx, scy, ecx, ecy, 4 * ICNDocument::hs_connector, 0);
         if (ok) {
             return;
         } else {
             m_cellPointList.clear();
         }
     }
 
     // Corner 1
     {
         bool ok = checkLineRoute(scx, scy, ecx, ecy, 2 * ICNDocument::hs_connector, 0);
         if (!ok) {
             m_cellPointList.clear();
         } else {
             ok = checkLineRoute(scx, scy, ecx, ecy, ICNDocument::hs_connector - 1, 0);
             if (ok) {
                 return;
             } else {
                 m_cellPointList.clear();
             }
         }
     }
 
     // Corner 2
     {
         bool ok = checkLineRoute(scx, scy, ecx, ecy, 2 * ICNDocument::hs_connector, 0);
         if (!ok) {
             m_cellPointList.clear();
         } else {
             ok = checkLineRoute(scx, scy, ecx, ecy, ICNDocument::hs_connector - 1, 0);
             if (ok) {
                 return;
             } else {
                 m_cellPointList.clear();
             }
         }
     }
 
     // It seems we must resort to brute-force route-checking
     {
         cellsPtr->reset();
 
         xcells = p_icnDocument->canvas()->width() / 8;
         ycells = p_icnDocument->canvas()->height() / 8;
 
         // Now to map out the shortest routes to the cells
         Cell *const startCell = &cellsPtr->cell(ecx, ecy);
         startCell->permanent = true;
         startCell->bestScore = 0;
         startCell->prevX = startCellPos;
         startCell->prevY = startCellPos;
 
         tempLabels.clear();
         checkCell(ecx, ecy);
 
         // Daniel: I changed it from a do while to a while otherwise
         // in rare cases the iterator can end up as end().
         while (tempLabels.size() > 0 && !cellsPtr->cell(scx, scy).permanent) {
             TempLabelMap::iterator it = tempLabels.begin();
             checkCell(it->second.x, it->second.y);
             tempLabels.erase(it);
         }
 
         // Now, retrace the shortest route from the endcell to get out points :)
         int x = scx, y = scy;
         bool ok = true;
 
         do {
             m_cellPointList.append(QPoint(x, y));
             int newx = cellsPtr->cell(x, y).prevX;
             int newy = cellsPtr->cell(x, y).prevY;
             if (newx == x && newy == y) {
                 ok = false;
             }
             x = newx;
             y = newy;
         } while (cellsPtr->haveCell(x, y) && (x != startCellPos) && (y != startCellPos) && ok);
 
         // And append the last point...
         m_cellPointList.append(QPoint(ecx, ecy));
     }
 
     removeDuplicatePoints();
 }
 
 bool ConRouter::checkLineRoute(int scx, int scy, int ecx, int ecy, int maxConScore, int maxCIScore)
 {
     if ((scx != ecx) && (scy != ecy))
         return false;
 
     const bool isHorizontal = scy == ecy;
 
     int start = 0, end = 0, x = 0, y = 0, dd = 0;
     if (isHorizontal) {
         dd = (scx < ecx) ? 1 : -1;
         start = scx;
         end = ecx + dd;
         y = scy;
     } else {
         dd = (scy < ecy) ? 1 : -1;
         start = scy;
         end = ecy + dd;
         x = scx;
     }
 
     Cells *cells = p_icnDocument->cells();
 
     if (isHorizontal) {
         for (int x = start; x != end; x += dd) {
             if (std::abs(x - start) > 1 && std::abs(x - end) > 1 && (cells->cell(x, y).CIpenalty > maxCIScore || cells->cell(x, y).Cpenalty > maxConScore)) {
                 return false;
             } else
                 m_cellPointList.append(QPoint(x, y));
         }
     } else {
         for (int y = start; y != end; y += dd) {
             if (std::abs(y - start) > 1 && std::abs(y - end) > 1 && (cells->cell(x, y).CIpenalty > maxCIScore || cells->cell(x, y).Cpenalty > maxConScore)) {
                 return false;
             } else {
                 m_cellPointList.append(QPoint(x, y));
             }
         }
     }
 
     m_cellPointList.prepend(QPoint(scx, scy));
     m_cellPointList.append(QPoint(ecx, ecy));
     removeDuplicatePoints();
     return true;
 }
 
 void ConRouter::removeDuplicatePoints()
 {
     QPoint invalid(-(1 << 30), -(1 << 30));
     QPoint prev = invalid;
 
     const QPointList::iterator end = m_cellPointList.end();
     for (QPointList::iterator it = m_cellPointList.begin(); it != end; ++it) {
         if (*it == prev) {
             *it = invalid;
         } else {
             prev = *it;
         }
     }
     m_cellPointList.removeAll(invalid);
 }