1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
|
// -*- C++ -*-
/* Copyright (C) 1989, 1990, 1991, 1992 Free Software Foundation, Inc.
Written by James Clark (jjc@jclark.com)
This file is part of groff.
groff 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, or (at your option) any later
version.
groff 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 General Public License
for more details.
You should have received a copy of the GNU General Public License along
with groff; see the file COPYING. If not, write to the Free Software
Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
#include "eqn.h"
#include "pbox.h"
class over_box : public box {
private:
int reduce_size;
box *num;
box *den;
public:
over_box(int small, box *, box *);
~over_box();
void debug_print();
int compute_metrics(int);
void output();
void check_tabs(int);
};
box *make_over_box(box *pp, box *qq)
{
return new over_box(0, pp, qq);
}
box *make_small_over_box(box *pp, box *qq)
{
return new over_box(1, pp, qq);
}
over_box::over_box(int is_small, box *pp, box *qq)
: num(pp), den(qq), reduce_size(is_small)
{
spacing_type = INNER_TYPE;
}
over_box::~over_box()
{
delete num;
delete den;
}
int over_box::compute_metrics(int style)
{
if (reduce_size) {
style = script_style(style);
printf(".nr " SIZE_FORMAT " \\n[.s]\n", uid);
set_script_size();
printf(".nr " SMALL_SIZE_FORMAT " \\n[.s]\n", uid);
}
int mark_uid;
int res = num->compute_metrics(style);
if (res)
mark_uid = num->uid;
int r = den->compute_metrics(cramped_style(style));
if (r && res)
error("multiple marks and lineups");
else {
mark_uid = den->uid;
res = r;
}
if (reduce_size)
printf(".ps \\n[" SIZE_FORMAT "]\n", uid);
printf(".nr " WIDTH_FORMAT " (\\n[" WIDTH_FORMAT "]>?\\n[" WIDTH_FORMAT "]",
uid, num->uid, den->uid);
// allow for \(ru being wider than both the numerator and denominator
if (!draw_flag)
fputs(">?\\w" DELIMITER_CHAR "\\(ru" DELIMITER_CHAR, stdout);
printf(")+%dM\n", null_delimiter_space*2 + over_hang*2);
// 15b
printf(".nr " SUP_RAISE_FORMAT " %dM\n",
uid, (reduce_size ? num2 : num1));
printf(".nr " SUB_LOWER_FORMAT " %dM\n",
uid, (reduce_size ? denom2 : denom1));
// 15d
printf(".nr " SUP_RAISE_FORMAT " +(\\n[" DEPTH_FORMAT
"]-\\n[" SUP_RAISE_FORMAT "]+%dM+(%dM/2)+%dM)>?0\n",
uid, num->uid, uid, axis_height, default_rule_thickness,
default_rule_thickness*(reduce_size ? 1 : 3));
printf(".nr " SUB_LOWER_FORMAT " +(\\n[" HEIGHT_FORMAT
"]-\\n[" SUB_LOWER_FORMAT "]-%dM+(%dM/2)+%dM)>?0\n",
uid, den->uid, uid, axis_height, default_rule_thickness,
default_rule_thickness*(reduce_size ? 1 : 3));
printf(".nr " HEIGHT_FORMAT " \\n[" SUP_RAISE_FORMAT "]+\\n["
HEIGHT_FORMAT "]\n",
uid, uid, num->uid);
printf(".nr " DEPTH_FORMAT " \\n[" SUB_LOWER_FORMAT "]+\\n["
DEPTH_FORMAT "]\n",
uid, uid, den->uid);
if (res)
printf(".nr " MARK_REG " +(\\n[" WIDTH_FORMAT "]-\\n["
WIDTH_FORMAT "]/2)\n", uid, mark_uid);
return res;
}
#define USE_Z
void over_box::output()
{
if (reduce_size)
printf("\\s[\\n[" SMALL_SIZE_FORMAT "]]", uid);
#ifdef USE_Z
printf("\\Z" DELIMITER_CHAR);
#endif
// move up to the numerator baseline
printf("\\v'-\\n[" SUP_RAISE_FORMAT "]u'", uid);
// move across so that it's centered
printf("\\h'\\n[" WIDTH_FORMAT "]u-\\n[" WIDTH_FORMAT "]u/2u'",
uid, num->uid);
// print the numerator
num->output();
#ifdef USE_Z
printf(DELIMITER_CHAR);
#else
// back again
printf("\\h'-\\n[" WIDTH_FORMAT "]u'", num->uid);
printf("\\h'-(\\n[" WIDTH_FORMAT "]u-\\n[" WIDTH_FORMAT "]u/2u)'",
uid, num->uid);
// down again
printf("\\v'\\n[" SUP_RAISE_FORMAT "]u'", uid);
#endif
#ifdef USE_Z
printf("\\Z" DELIMITER_CHAR);
#endif
// move down to the denominator baseline
printf("\\v'\\n[" SUB_LOWER_FORMAT "]u'", uid);
// move across so that it's centered
printf("\\h'\\n[" WIDTH_FORMAT "]u-\\n[" WIDTH_FORMAT "]u/2u'",
uid, den->uid);
// print the the denominator
den->output();
#ifdef USE_Z
printf(DELIMITER_CHAR);
#else
// back again
printf("\\h'-\\n[" WIDTH_FORMAT "]u'", den->uid);
printf("\\h'-(\\n[" WIDTH_FORMAT "]u-\\n[" WIDTH_FORMAT "]u/2u)'",
uid, den->uid);
// up again
printf("\\v'-\\n[" SUB_LOWER_FORMAT "]u'", uid);
#endif
if (reduce_size)
printf("\\s[\\n[" SIZE_FORMAT "]]", uid);
// draw the line
printf("\\h'%dM'", null_delimiter_space);
printf("\\v'-%dM'", axis_height);
fputs(draw_flag ? "\\D'l" : "\\l'", stdout);
printf("\\n[" WIDTH_FORMAT "]u-%dM",
uid, 2*null_delimiter_space);
fputs(draw_flag ? " 0'" : "\\&\\(ru'", stdout);
printf("\\v'%dM'", axis_height);
printf("\\h'%dM'", null_delimiter_space);
}
void over_box::debug_print()
{
fprintf(stderr, "{ ");
num->debug_print();
if (reduce_size)
fprintf(stderr, " } smallover { ");
else
fprintf(stderr, " } over { ");
den->debug_print();
fprintf(stderr, " }");
}
void over_box::check_tabs(int level)
{
num->check_tabs(level + 1);
den->check_tabs(level + 1);
}
|
