2 /* Copyright (C) 1989, 1990, 1991, 1992, 2001, 2002
3 Free Software Foundation, Inc.
4 Written by James Clark (jjc@jclark.com)
6 This file is part of groff.
8 groff is free software; you can redistribute it and/or modify it under
9 the terms of the GNU General Public License as published by the Free
10 Software Foundation; either version 2, or (at your option) any later
13 groff is distributed in the hope that it will be useful, but WITHOUT ANY
14 WARRANTY; without even the implied warranty of MERCHANTABILITY or
15 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
18 You should have received a copy of the GNU General Public License along
19 with groff; see the file COPYING. If not, write to the Free Software
20 Foundation, 51 Franklin St - Fifth Floor, Boston, MA 02110-1301, USA. */
25 class over_box : public box {
31 over_box(int small, box *, box *);
34 int compute_metrics(int);
39 box *make_over_box(box *pp, box *qq)
41 return new over_box(0, pp, qq);
44 box *make_small_over_box(box *pp, box *qq)
46 return new over_box(1, pp, qq);
49 over_box::over_box(int is_small, box *pp, box *qq)
50 : reduce_size(is_small), num(pp), den(qq)
52 spacing_type = INNER_TYPE;
61 int over_box::compute_metrics(int style)
64 style = script_style(style);
65 printf(".nr " SIZE_FORMAT " \\n[.ps]\n", uid);
67 printf(".nr " SMALL_SIZE_FORMAT " \\n[.ps]\n", uid);
70 int res = num->compute_metrics(style);
73 int r = den->compute_metrics(cramped_style(style));
75 error("multiple marks and lineups");
81 printf(".ps \\n[" SIZE_FORMAT "]u\n", uid);
82 printf(".nr " WIDTH_FORMAT " (\\n[" WIDTH_FORMAT "]>?\\n[" WIDTH_FORMAT "]",
83 uid, num->uid, den->uid);
84 // allow for \(ru being wider than both the numerator and denominator
86 fputs(">?\\w" DELIMITER_CHAR "\\(ru" DELIMITER_CHAR, stdout);
87 printf(")+%dM\n", null_delimiter_space*2 + over_hang*2);
89 printf(".nr " SUP_RAISE_FORMAT " %dM\n",
90 uid, (reduce_size ? num2 : num1));
91 printf(".nr " SUB_LOWER_FORMAT " %dM\n",
92 uid, (reduce_size ? denom2 : denom1));
95 printf(".nr " SUP_RAISE_FORMAT " +(\\n[" DEPTH_FORMAT
96 "]-\\n[" SUP_RAISE_FORMAT "]+%dM+(%dM/2)+%dM)>?0\n",
97 uid, num->uid, uid, axis_height, default_rule_thickness,
98 default_rule_thickness*(reduce_size ? 1 : 3));
99 printf(".nr " SUB_LOWER_FORMAT " +(\\n[" HEIGHT_FORMAT
100 "]-\\n[" SUB_LOWER_FORMAT "]-%dM+(%dM/2)+%dM)>?0\n",
101 uid, den->uid, uid, axis_height, default_rule_thickness,
102 default_rule_thickness*(reduce_size ? 1 : 3));
105 printf(".nr " HEIGHT_FORMAT " \\n[" SUP_RAISE_FORMAT "]+\\n["
108 printf(".nr " DEPTH_FORMAT " \\n[" SUB_LOWER_FORMAT "]+\\n["
112 printf(".nr " MARK_REG " +(\\n[" WIDTH_FORMAT "]-\\n["
113 WIDTH_FORMAT "]/2)\n", uid, mark_uid);
119 void over_box::output()
122 printf("\\s[\\n[" SMALL_SIZE_FORMAT "]u]", uid);
124 printf("\\Z" DELIMITER_CHAR);
126 // move up to the numerator baseline
127 printf("\\v'-\\n[" SUP_RAISE_FORMAT "]u'", uid);
128 // move across so that it's centered
129 printf("\\h'\\n[" WIDTH_FORMAT "]u-\\n[" WIDTH_FORMAT "]u/2u'",
132 // print the numerator
136 printf(DELIMITER_CHAR);
139 printf("\\h'-\\n[" WIDTH_FORMAT "]u'", num->uid);
140 printf("\\h'-(\\n[" WIDTH_FORMAT "]u-\\n[" WIDTH_FORMAT "]u/2u)'",
143 printf("\\v'\\n[" SUP_RAISE_FORMAT "]u'", uid);
146 printf("\\Z" DELIMITER_CHAR);
148 // move down to the denominator baseline
149 printf("\\v'\\n[" SUB_LOWER_FORMAT "]u'", uid);
151 // move across so that it's centered
152 printf("\\h'\\n[" WIDTH_FORMAT "]u-\\n[" WIDTH_FORMAT "]u/2u'",
155 // print the the denominator
159 printf(DELIMITER_CHAR);
162 printf("\\h'-\\n[" WIDTH_FORMAT "]u'", den->uid);
163 printf("\\h'-(\\n[" WIDTH_FORMAT "]u-\\n[" WIDTH_FORMAT "]u/2u)'",
166 printf("\\v'-\\n[" SUB_LOWER_FORMAT "]u'", uid);
169 printf("\\s[\\n[" SIZE_FORMAT "]u]", uid);
171 printf("\\h'%dM'", null_delimiter_space);
172 printf("\\v'-%dM'", axis_height);
173 fputs(draw_flag ? "\\D'l" : "\\l'", stdout);
174 printf("\\n[" WIDTH_FORMAT "]u-%dM",
175 uid, 2*null_delimiter_space);
176 fputs(draw_flag ? " 0'" : "\\&\\(ru'", stdout);
177 printf("\\v'%dM'", axis_height);
178 printf("\\h'%dM'", null_delimiter_space);
181 void over_box::debug_print()
183 fprintf(stderr, "{ ");
186 fprintf(stderr, " } smallover { ");
188 fprintf(stderr, " } over { ");
190 fprintf(stderr, " }");
193 void over_box::check_tabs(int level)
195 num->check_tabs(level + 1);
196 den->check_tabs(level + 1);