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eqn
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other.cc
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C/C++ Source or Header
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1995-06-22
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// -*- 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 accent_box : public pointer_box {
private:
box *ab;
public:
accent_box(box *, box *);
~accent_box();
int compute_metrics(int);
void output();
void debug_print();
void check_tabs(int);
};
box *make_accent_box(box *p, box *q)
{
return new accent_box(p, q);
}
accent_box::accent_box(box *pp, box *qq) : ab(qq), pointer_box(pp)
{
}
accent_box::~accent_box()
{
delete ab;
}
#if 0
int accent_box::compute_metrics(int style)
{
int r = p->compute_metrics(style);
p->compute_skew();
ab->compute_metrics(style);
printf(".nr " WIDTH_FORMAT " 0\\n[" WIDTH_FORMAT "]\n", uid, p->uid);
printf(".nr " DEPTH_FORMAT " \\n[" DEPTH_FORMAT "]\n", uid, p->uid);
printf(".nr " SUP_RAISE_FORMAT " \\n[" HEIGHT_FORMAT "]-%dM>?0\n",
uid, p->uid, x_height);
printf(".nr " HEIGHT_FORMAT " \\n[" HEIGHT_FORMAT "]+\\n["
SUP_RAISE_FORMAT "]\n",
uid, ab->uid, uid);
return r;
}
void accent_box::output()
{
printf("\\h'\\n[" WIDTH_FORMAT "]u-\\n[" WIDTH_FORMAT "]u/2u+\\n["
SKEW_FORMAT "]u'",
p->uid, ab->uid, p->uid);
printf("\\v'-\\n[" SUP_RAISE_FORMAT "]u'", uid);
ab->output();
printf("\\h'-\\n[" WIDTH_FORMAT "]u'", ab->uid);
printf("\\v'\\n[" SUP_RAISE_FORMAT "]u'", uid);
printf("\\h'-(\\n[" WIDTH_FORMAT "]u-\\n[" WIDTH_FORMAT "]u/2u+\\n["
SKEW_FORMAT "]u)'",
p->uid, ab->uid, p->uid);
p->output();
}
#endif
/* This version copes with the possibility of an accent's being wider
than its accentee. LEFT_WIDTH_FORMAT gives the distance from the
left edge of the resulting box to the middle of the accentee's box.*/
int accent_box::compute_metrics(int style)
{
int r = p->compute_metrics(style);
p->compute_skew();
ab->compute_metrics(style);
printf(".nr " LEFT_WIDTH_FORMAT " 0\\n[" WIDTH_FORMAT "]/2"
">?(\\n[" WIDTH_FORMAT "]/2-\\n[" SKEW_FORMAT "])\n",
uid, p->uid, ab->uid, p->uid);
printf(".nr " WIDTH_FORMAT " 0\\n[" WIDTH_FORMAT "]/2"
">?(\\n[" WIDTH_FORMAT "]/2+\\n[" SKEW_FORMAT "])"
"+\\n[" LEFT_WIDTH_FORMAT "]\n",
uid, p->uid, ab->uid, p->uid, uid);
printf(".nr " DEPTH_FORMAT " \\n[" DEPTH_FORMAT "]\n", uid, p->uid);
printf(".nr " SUP_RAISE_FORMAT " \\n[" HEIGHT_FORMAT "]-%dM>?0\n",
uid, p->uid, x_height);
printf(".nr " HEIGHT_FORMAT " \\n[" HEIGHT_FORMAT "]+\\n["
SUP_RAISE_FORMAT "]\n",
uid, ab->uid, uid);
if (r)
printf(".nr " MARK_REG " +\\n[" LEFT_WIDTH_FORMAT "]"
"-(\\n[" WIDTH_FORMAT "]/2)'\n",
uid, p->uid);
return r;
}
void accent_box::output()
{
printf("\\Z" DELIMITER_CHAR);
printf("\\h'\\n[" LEFT_WIDTH_FORMAT "]u+\\n[" SKEW_FORMAT "]u"
"-(\\n[" WIDTH_FORMAT "]u/2u)'",
uid, p->uid, ab->uid);
printf("\\v'-\\n[" SUP_RAISE_FORMAT "]u'", uid);
ab->output();
printf(DELIMITER_CHAR);
printf("\\Z" DELIMITER_CHAR);
printf("\\h'\\n[" LEFT_WIDTH_FORMAT "]u-(\\n[" WIDTH_FORMAT "]u/2u)'",
uid, p->uid);
p->output();
printf(DELIMITER_CHAR);
printf("\\h'\\n[" WIDTH_FORMAT "]u'", uid);
}
void accent_box::check_tabs(int level)
{
ab->check_tabs(level + 1);
p->check_tabs(level + 1);
}
void accent_box::debug_print()
{
fprintf(stderr, "{ ");
p->debug_print();
fprintf(stderr, " } accent { ");
ab->debug_print();
fprintf(stderr, " }");
}
class overline_char_box : public simple_box {
public:
overline_char_box();
void output();
void debug_print();
};
overline_char_box::overline_char_box()
{
}
void overline_char_box::output()
{
printf("\\v'-%dM/2u-%dM'", 7*default_rule_thickness, x_height);
printf((draw_flag ? "\\D'l%dM 0'" : "\\l'%dM\\&\\(ru'"),
accent_width);
printf("\\v'%dM/2u+%dM'", 7*default_rule_thickness, x_height);
}
void overline_char_box::debug_print()
{
fprintf(stderr, "<overline char>");
}
class overline_box : public pointer_box {
public:
overline_box(box *);
int compute_metrics(int);
void output();
void debug_print();
};
box *make_overline_box(box *p)
{
if (p->is_char())
return new accent_box(p, new overline_char_box);
else
return new overline_box(p);
}
overline_box::overline_box(box *pp) : pointer_box(pp)
{
}
int overline_box::compute_metrics(int style)
{
int r = p->compute_metrics(cramped_style(style));
// 9
printf(".nr " HEIGHT_FORMAT " \\n[" HEIGHT_FORMAT "]+%dM\n",
uid, p->uid, default_rule_thickness*5);
printf(".nr " WIDTH_FORMAT " 0\\n[" WIDTH_FORMAT "]\n", uid, p->uid);
printf(".nr " DEPTH_FORMAT " \\n[" DEPTH_FORMAT "]\n", uid, p->uid);
return r;
}
void overline_box::output()
{
// 9
printf("\\Z" DELIMITER_CHAR);
printf("\\v'-\\n[" HEIGHT_FORMAT "]u-(%dM/2u)'",
p->uid, 7*default_rule_thickness);
if (draw_flag)
printf("\\D'l\\n[" WIDTH_FORMAT "]u 0'", p->uid);
else
printf("\\l'\\n[" WIDTH_FORMAT "]u\\&\\(ru'", p->uid);
printf(DELIMITER_CHAR);
p->output();
}
void overline_box::debug_print()
{
fprintf(stderr, "{ ");
p->debug_print();
fprintf(stderr, " } bar");
}
class uaccent_box : public pointer_box {
box *ab;
public:
uaccent_box(box *, box *);
~uaccent_box();
int compute_metrics(int);
void output();
void compute_subscript_kern();
void check_tabs(int);
void debug_print();
};
box *make_uaccent_box(box *p, box *q)
{
return new uaccent_box(p, q);
}
uaccent_box::uaccent_box(box *pp, box *qq)
: pointer_box(pp), ab(qq)
{
}
uaccent_box::~uaccent_box()
{
delete ab;
}
int uaccent_box::compute_metrics(int style)
{
int r = p->compute_metrics(style);
ab->compute_metrics(style);
printf(".nr " LEFT_WIDTH_FORMAT " 0\\n[" WIDTH_FORMAT "]/2"
">?(\\n[" WIDTH_FORMAT "]/2)\n",
uid, p->uid, ab->uid);
printf(".nr " WIDTH_FORMAT " 0\\n[" WIDTH_FORMAT "]/2"
">?(\\n[" WIDTH_FORMAT "]/2)"
"+\\n[" LEFT_WIDTH_FORMAT "]\n",
uid, p->uid, ab->uid, uid);
printf(".nr " HEIGHT_FORMAT " \\n[" HEIGHT_FORMAT "]\n", uid, p->uid);
printf(".nr " DEPTH_FORMAT " \\n[" DEPTH_FORMAT "]"
"+\\n[" DEPTH_FORMAT "]\n",
uid, p->uid, ab->uid);
if (r)
printf(".nr " MARK_REG " +\\n[" LEFT_WIDTH_FORMAT "]"
"-(\\n[" WIDTH_FORMAT "]/2)'\n",
uid, p->uid);
return r;
}
void uaccent_box::output()
{
printf("\\Z" DELIMITER_CHAR);
printf("\\h'\\n[" LEFT_WIDTH_FORMAT "]u-(\\n[" WIDTH_FORMAT "]u/2u)'",
uid, ab->uid);
printf("\\v'\\n[" DEPTH_FORMAT "]u'", p->uid);
ab->output();
printf(DELIMITER_CHAR);
printf("\\Z" DELIMITER_CHAR);
printf("\\h'\\n[" LEFT_WIDTH_FORMAT "]u-(\\n[" WIDTH_FORMAT "]u/2u)'",
uid, p->uid);
p->output();
printf(DELIMITER_CHAR);
printf("\\h'\\n[" WIDTH_FORMAT "]u'", uid);
}
void uaccent_box::check_tabs(int level)
{
ab->check_tabs(level + 1);
p->check_tabs(level + 1);
}
void uaccent_box::compute_subscript_kern()
{
box::compute_subscript_kern(); // want 0 subscript kern
}
void uaccent_box::debug_print()
{
fprintf(stderr, "{ ");
p->debug_print();
fprintf(stderr, " } uaccent { ");
ab->debug_print();
fprintf(stderr, " }");
}
class underline_char_box : public simple_box {
public:
underline_char_box();
void output();
void debug_print();
};
underline_char_box::underline_char_box()
{
}
void underline_char_box::output()
{
printf("\\v'%dM/2u'", 7*default_rule_thickness);
printf((draw_flag ? "\\D'l%dM 0'" : "\\l'%dM\\&\\(ru'"),
accent_width);
printf("\\v'-%dM/2u'", 7*default_rule_thickness);
}
void underline_char_box::debug_print()
{
fprintf(stderr, "<underline char>");
}
class underline_box : public pointer_box {
public:
underline_box(box *);
int compute_metrics(int);
void output();
void compute_subscript_kern();
void debug_print();
};
box *make_underline_box(box *p)
{
if (p->is_char())
return new uaccent_box(p, new underline_char_box);
else
return new underline_box(p);
}
underline_box::underline_box(box *pp) : pointer_box(pp)
{
}
int underline_box::compute_metrics(int style)
{
int r = p->compute_metrics(style);
// 10
printf(".nr " DEPTH_FORMAT " \\n[" DEPTH_FORMAT "]+%dM\n",
uid, p->uid, default_rule_thickness*5);
printf(".nr " WIDTH_FORMAT " 0\\n[" WIDTH_FORMAT "]\n", uid, p->uid);
printf(".nr " HEIGHT_FORMAT " \\n[" HEIGHT_FORMAT "]\n", uid, p->uid);
return r;
}
void underline_box::output()
{
// 10
printf("\\Z" DELIMITER_CHAR);
printf("\\v'\\n[" DEPTH_FORMAT "]u+(%dM/2u)'",
p->uid, 7*default_rule_thickness);
if (draw_flag)
printf("\\D'l\\n[" WIDTH_FORMAT "]u 0'", p->uid);
else
printf("\\l'\\n[" WIDTH_FORMAT "]u\\&\\(ru'", p->uid);
printf(DELIMITER_CHAR);
p->output();
}
// we want an underline box to have 0 subscript kern
void underline_box::compute_subscript_kern()
{
box::compute_subscript_kern();
}
void underline_box::debug_print()
{
fprintf(stderr, "{ ");
p->debug_print();
fprintf(stderr, " } under");
}
size_box::size_box(char *s, box *pp) : size(s), pointer_box(pp)
{
}
int size_box::compute_metrics(int style)
{
printf(".nr " SIZE_FORMAT " \\n[.s]\n", uid);
printf(".ps %s\n", size);
printf(".nr " SMALL_SIZE_FORMAT " \\n[.s]\n", uid);
int r = p->compute_metrics(style);
printf(".ps \\n[" SIZE_FORMAT "]\n", uid);
printf(".nr " WIDTH_FORMAT " 0\\n[" WIDTH_FORMAT "]\n", uid, p->uid);
printf(".nr " HEIGHT_FORMAT " \\n[" HEIGHT_FORMAT "]\n", uid, p->uid);
printf(".nr " DEPTH_FORMAT " \\n[" DEPTH_FORMAT "]\n", uid, p->uid);
return r;
}
void size_box::output()
{
printf("\\s[\\n[" SMALL_SIZE_FORMAT "]]", uid);
p->output();
printf("\\s[\\n[" SIZE_FORMAT "]]", uid);
}
size_box::~size_box()
{
a_delete size;
}
void size_box::debug_print()
{
fprintf(stderr, "size %s { ", size);
p->debug_print();
fprintf(stderr, " }");
}
font_box::font_box(char *s, box *pp) : pointer_box(pp), f(s)
{
}
font_box::~font_box()
{
a_delete f;
}
int font_box::compute_metrics(int style)
{
const char *old_roman_font = current_roman_font;
current_roman_font = f;
printf(".nr " FONT_FORMAT " \\n[.f]\n", uid);
printf(".ft %s\n", f);
int r = p->compute_metrics(style);
current_roman_font = old_roman_font;
printf(".ft \\n[" FONT_FORMAT "]\n", uid);
printf(".nr " WIDTH_FORMAT " 0\\n[" WIDTH_FORMAT "]\n", uid, p->uid);
printf(".nr " HEIGHT_FORMAT " \\n[" HEIGHT_FORMAT "]\n", uid, p->uid);
printf(".nr " DEPTH_FORMAT " \\n[" DEPTH_FORMAT "]\n", uid, p->uid);
return r;
}
void font_box::output()
{
printf("\\f[%s]", f);
const char *old_roman_font = current_roman_font;
current_roman_font = f;
p->output();
current_roman_font = old_roman_font;
printf("\\f[\\n[" FONT_FORMAT "]]", uid);
}
void font_box::debug_print()
{
fprintf(stderr, "font %s { ", f);
p->debug_print();
fprintf(stderr, " }");
}
fat_box::fat_box(box *pp) : pointer_box(pp)
{
}
int fat_box::compute_metrics(int style)
{
int r = p->compute_metrics(style);
printf(".nr " WIDTH_FORMAT " 0\\n[" WIDTH_FORMAT "]+%dM\n",
uid, p->uid, fat_offset);
printf(".nr " HEIGHT_FORMAT " \\n[" HEIGHT_FORMAT "]\n", uid, p->uid);
printf(".nr " DEPTH_FORMAT " \\n[" DEPTH_FORMAT "]\n", uid, p->uid);
return r;
}
void fat_box::output()
{
p->output();
printf("\\h'-\\n[" WIDTH_FORMAT "]u'", p->uid);
printf("\\h'%dM'", fat_offset);
p->output();
}
void fat_box::debug_print()
{
fprintf(stderr, "fat { ");
p->debug_print();
fprintf(stderr, " }");
}
vmotion_box::vmotion_box(int i, box *pp) : n(i), pointer_box(pp)
{
}
int vmotion_box::compute_metrics(int style)
{
int r = p->compute_metrics(style);
printf(".nr " WIDTH_FORMAT " 0\\n[" WIDTH_FORMAT "]\n", uid, p->uid);
if (n > 0) {
printf(".nr " HEIGHT_FORMAT " %dM+\\n[" HEIGHT_FORMAT "]\n",
uid, n, p->uid);
printf(".nr " DEPTH_FORMAT " \\n[" DEPTH_FORMAT "]\n", uid, p->uid);
}
else {
printf(".nr " DEPTH_FORMAT " %dM+\\n[" DEPTH_FORMAT "]>?0\n",
uid, -n, p->uid);
printf(".nr " HEIGHT_FORMAT " \\n[" HEIGHT_FORMAT "]\n",
uid, p->uid);
}
return r;
}
void vmotion_box::output()
{
printf("\\v'%dM'", -n);
p->output();
printf("\\v'%dM'", n);
}
void vmotion_box::debug_print()
{
if (n >= 0)
fprintf(stderr, "up %d { ", n);
else
fprintf(stderr, "down %d { ", -n);
p->debug_print();
fprintf(stderr, " }");
}
hmotion_box::hmotion_box(int i, box *pp) : n(i), pointer_box(pp)
{
}
int hmotion_box::compute_metrics(int style)
{
int r = p->compute_metrics(style);
printf(".nr " WIDTH_FORMAT " 0\\n[" WIDTH_FORMAT "]+%dM\n",
uid, p->uid, n);
printf(".nr " HEIGHT_FORMAT " \\n[" HEIGHT_FORMAT "]\n", uid, p->uid);
printf(".nr " DEPTH_FORMAT " \\n[" DEPTH_FORMAT "]\n", uid, p->uid);
if (r)
printf(".nr " MARK_REG " +%dM\n", n);
return r;
}
void hmotion_box::output()
{
printf("\\h'%dM'", n);
p->output();
}
void hmotion_box::debug_print()
{
if (n >= 0)
fprintf(stderr, "fwd %d { ", n);
else
fprintf(stderr, "back %d { ", -n);
p->debug_print();
fprintf(stderr, " }");
}
vcenter_box::vcenter_box(box *pp) : pointer_box(pp)
{
}
int vcenter_box::compute_metrics(int style)
{
int r = p->compute_metrics(style);
printf(".nr " WIDTH_FORMAT " 0\\n[" WIDTH_FORMAT "]\n", uid, p->uid);
printf(".nr " SUP_RAISE_FORMAT " \\n[" DEPTH_FORMAT "]-\\n["
HEIGHT_FORMAT "]/2+%dM\n",
uid, p->uid, p->uid, axis_height);
printf(".nr " HEIGHT_FORMAT " \\n[" HEIGHT_FORMAT "]+\\n["
SUP_RAISE_FORMAT "]>?0\n", uid, p->uid, uid);
printf(".nr " DEPTH_FORMAT " \\n[" DEPTH_FORMAT "]-\\n["
SUP_RAISE_FORMAT "]>?0\n", uid, p->uid, uid);
return r;
}
void vcenter_box::output()
{
printf("\\v'-\\n[" SUP_RAISE_FORMAT "]u'", uid);
p->output();
printf("\\v'\\n[" SUP_RAISE_FORMAT "]u'", uid);
}
void vcenter_box::debug_print()
{
fprintf(stderr, "vcenter { ");
p->debug_print();
fprintf(stderr, " }");
}