1/*	$NetBSD: box.cc,v 1.4 2021/12/05 09:22:45 rillig Exp $	*/
2
3/*-
4 * Copyright (c) 2003 The NetBSD Foundation, Inc.
5 * All rights reserved.
6 *
7 * This code is derived from software contributed to The NetBSD Foundation
8 * by Christos Zoulas.
9 *
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
13 * 1. Redistributions of source code must retain the above copyright
14 *    notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 *    notice, this list of conditions and the following disclaimer in the
17 *    documentation and/or other materials provided with the distribution.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
22 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
29 * POSSIBILITY OF SUCH DAMAGE.
30 */
31
32/*
33 * Box computations
34 */
35
36#include "defs.h"
37RCSID("$NetBSD: box.cc,v 1.4 2021/12/05 09:22:45 rillig Exp $")
38
39#include "box.h"
40#include "board.h"
41#include "gamescreen.h"
42#include <curses.h>
43
44const POINT BOX::edges[BOX::last] =
45    { { 0, -1 }, { 0, 1 }, { -1, 0 }, { 1, 0 } };
46const POINT BOX::corners[BOX::last] =
47    { { -1, -1 }, { -1, 1 }, { 1, -1 }, { 1, 1 } };
48const int  BOX::syms[BOX::last] =
49    { GAMESCREEN::GS_HLINE, GAMESCREEN::GS_HLINE,
50      GAMESCREEN::GS_VLINE, GAMESCREEN::GS_VLINE };
51
52BOX::BOX(size_t py, size_t px, BOARD& b) :
53    _b(b)
54{
55    _centery = py * 2 + 1;
56    _centerx = px * 2 + 1;
57}
58
59void BOX::addcorner(size_t y, size_t x)
60{
61    char sym;
62    _b.getScrn()->moveto(y, x);
63    if (x == 0) {
64	if (y == 0)
65	    sym = GAMESCREEN::GS_ULCORNER;
66	else if (y == _b.ty() - 1)
67	    sym = GAMESCREEN::GS_LLCORNER;
68	else
69	    sym = GAMESCREEN::GS_LTEE;
70    } else if (x == _b.tx() - 1) {
71	if (y == 0)
72	    sym = GAMESCREEN::GS_URCORNER;
73	else if (y == _b.ty() - 1)
74	    sym = GAMESCREEN::GS_LRCORNER;
75	else
76	    sym = GAMESCREEN::GS_RTEE;
77    } else if (y == 0)
78	sym = GAMESCREEN::GS_TTEE;
79    else if (y == _b.ty() - 1)
80	sym = GAMESCREEN::GS_BTEE;
81    else
82	sym = GAMESCREEN::GS_PLUS;
83
84    _b.getScrn()->addedge(sym);
85}
86
87// Paint a box
88void BOX::paint(void)
89{
90    int e;
91    if (_b.getScrn() == NULL)
92	return;
93
94    _b.getScrn()->moveto(_centery, _centerx);
95    _b.getScrn()->addsym(name());
96
97    for (e = BOX::first; e < BOX::last; e++) {
98	addcorner(_centery + corners[e].y, _centerx + corners[e].x);
99	_b.getScrn()->moveto(_centery + edges[e].y, _centerx + edges[e].x);
100	_b.getScrn()->addedge(edge(static_cast<EDGE>(e)));
101    }
102    _b.getScrn()->redraw();
103}
104
105// Return the name
106int& BOX::name(void)
107{
108    return _b.data(_centery, _centerx);
109}
110
111// Set an edge
112void BOX::set(int e)
113{
114    _b.data(_centery + edges[e].y, _centerx + edges[e].x) = syms[e];
115}
116
117// Clear an edge
118void BOX::clr(int e)
119{
120    _b.data(_centery + edges[e].y, _centerx + edges[e].x) = ' ';
121}
122
123// Test an edge
124int BOX::isset(int e) const
125{
126    return _b.data(_centery + edges[e].y, _centerx + edges[e].x) != ' ';
127}
128
129// Return the edge
130int& BOX::edge(int e)
131{
132    return _b.data(_centery + edges[e].y, _centerx + edges[e].x);
133}
134
135// Count the number of edges set in the box
136int BOX::count(void) const
137{
138    int cnt = 0;
139
140    for (int e = BOX::first; e < BOX::last; e++)
141	cnt += isset(static_cast<EDGE>(e));
142    return cnt;
143}
144
145// Clear the box
146void BOX::reset(void)
147{
148    for (int e = BOX::first; e < BOX::last; e++)
149	clr(static_cast<EDGE>(e));
150    name() = ' ';
151}
152