/*      $NetBSD: box.cc,v 1.4 2021/12/05 09:22:45 rillig Exp $  */

/*-
* Copyright (c) 2003 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by Christos Zoulas.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
*    notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
*    notice, this list of conditions and the following disclaimer in the
*    documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/

/*
* Box computations
*/

#include "defs.h"
RCSID("$NetBSD: box.cc,v 1.4 2021/12/05 09:22:45 rillig Exp $")

#include "box.h"
#include "board.h"
#include "gamescreen.h"
#include <curses.h>

const POINT BOX::edges[BOX::last] =
   { { 0, -1 }, { 0, 1 }, { -1, 0 }, { 1, 0 } };
const POINT BOX::corners[BOX::last] =
   { { -1, -1 }, { -1, 1 }, { 1, -1 }, { 1, 1 } };
const int  BOX::syms[BOX::last] =
   { GAMESCREEN::GS_HLINE, GAMESCREEN::GS_HLINE,
     GAMESCREEN::GS_VLINE, GAMESCREEN::GS_VLINE };

BOX::BOX(size_t py, size_t px, BOARD& b) :
   _b(b)
{
   _centery = py * 2 + 1;
   _centerx = px * 2 + 1;
}

void BOX::addcorner(size_t y, size_t x)
{
   char sym;
   _b.getScrn()->moveto(y, x);
   if (x == 0) {
       if (y == 0)
           sym = GAMESCREEN::GS_ULCORNER;
       else if (y == _b.ty() - 1)
           sym = GAMESCREEN::GS_LLCORNER;
       else
           sym = GAMESCREEN::GS_LTEE;
   } else if (x == _b.tx() - 1) {
       if (y == 0)
           sym = GAMESCREEN::GS_URCORNER;
       else if (y == _b.ty() - 1)
           sym = GAMESCREEN::GS_LRCORNER;
       else
           sym = GAMESCREEN::GS_RTEE;
   } else if (y == 0)
       sym = GAMESCREEN::GS_TTEE;
   else if (y == _b.ty() - 1)
       sym = GAMESCREEN::GS_BTEE;
   else
       sym = GAMESCREEN::GS_PLUS;

   _b.getScrn()->addedge(sym);
}

// Paint a box
void BOX::paint(void)
{
   int e;
   if (_b.getScrn() == NULL)
       return;

   _b.getScrn()->moveto(_centery, _centerx);
   _b.getScrn()->addsym(name());

   for (e = BOX::first; e < BOX::last; e++) {
       addcorner(_centery + corners[e].y, _centerx + corners[e].x);
       _b.getScrn()->moveto(_centery + edges[e].y, _centerx + edges[e].x);
       _b.getScrn()->addedge(edge(static_cast<EDGE>(e)));
   }
   _b.getScrn()->redraw();
}

// Return the name
int& BOX::name(void)
{
   return _b.data(_centery, _centerx);
}

// Set an edge
void BOX::set(int e)
{
   _b.data(_centery + edges[e].y, _centerx + edges[e].x) = syms[e];
}

// Clear an edge
void BOX::clr(int e)
{
   _b.data(_centery + edges[e].y, _centerx + edges[e].x) = ' ';
}

// Test an edge
int BOX::isset(int e) const
{
   return _b.data(_centery + edges[e].y, _centerx + edges[e].x) != ' ';
}

// Return the edge
int& BOX::edge(int e)
{
   return _b.data(_centery + edges[e].y, _centerx + edges[e].x);
}

// Count the number of edges set in the box
int BOX::count(void) const
{
   int cnt = 0;

   for (int e = BOX::first; e < BOX::last; e++)
       cnt += isset(static_cast<EDGE>(e));
   return cnt;
}

// Clear the box
void BOX::reset(void)
{
   for (int e = BOX::first; e < BOX::last; e++)
       clr(static_cast<EDGE>(e));
   name() = ' ';
}