238 lines
6.3 KiB
C++
238 lines
6.3 KiB
C++
// -*- C++ -*-
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/* Copyright (C) 1989, 1990, 1991, 1992 Free Software Foundation, Inc.
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Written by James Clark (jjc@jclark.com)
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This file is part of groff.
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groff is free software; you can redistribute it and/or modify it under
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the terms of the GNU General Public License as published by the Free
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Software Foundation; either version 2, or (at your option) any later
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version.
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groff is distributed in the hope that it will be useful, but WITHOUT ANY
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WARRANTY; without even the implied warranty of MERCHANTABILITY or
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FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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for more details.
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You should have received a copy of the GNU General Public License along
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with groff; see the file COPYING. If not, write to the Free Software
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Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
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#include "eqn.h"
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#include "pbox.h"
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list_box *box::to_list_box()
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{
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return 0;
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}
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list_box *list_box::to_list_box()
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{
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return this;
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}
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void list_box::append(box *pp)
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{
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list_box *q = pp->to_list_box();
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if (q == 0)
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list.append(pp);
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else {
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for (int i = 0; i < q->list.len; i++) {
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list.append(q->list.p[i]);
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q->list.p[i] = 0;
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}
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q->list.len = 0;
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delete q;
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}
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}
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list_box::list_box(box *pp) : list(pp), sty(-1)
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{
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list_box *q = pp->to_list_box();
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if (q != 0) {
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// flatten it
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list.p[0] = q->list.p[0];
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for (int i = 1; i < q->list.len; i++) {
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list.append(q->list.p[i]);
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q->list.p[i] = 0;
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}
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q->list.len = 0;
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delete q;
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}
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}
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static int compute_spacing(int is_script, int left, int right)
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{
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if (left == SUPPRESS_TYPE || right == SUPPRESS_TYPE)
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return 0;
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if (left == PUNCTUATION_TYPE)
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return is_script ? 0 : thin_space;
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if (left == OPENING_TYPE || right == CLOSING_TYPE)
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return 0;
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if (right == BINARY_TYPE || left == BINARY_TYPE)
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return is_script ? 0 : medium_space;
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if (right == RELATION_TYPE) {
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if (left == RELATION_TYPE)
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return 0;
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else
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return is_script ? 0 : thick_space;
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}
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if (left == RELATION_TYPE)
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return is_script ? 0 : thick_space;
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if (right == OPERATOR_TYPE)
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return thin_space;
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if (left == INNER_TYPE || right == INNER_TYPE)
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return is_script ? 0 : thin_space;
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if (left == OPERATOR_TYPE && right == ORDINARY_TYPE)
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return thin_space;
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return 0;
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}
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int list_box::compute_metrics(int style)
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{
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sty = style;
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int i;
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for (i = 0; i < list.len; i++) {
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int t = list.p[i]->spacing_type;
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// 5
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if (t == BINARY_TYPE) {
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int prevt;
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if (i == 0
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|| (prevt = list.p[i-1]->spacing_type) == BINARY_TYPE
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|| prevt == OPERATOR_TYPE
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|| prevt == RELATION_TYPE
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|| prevt == OPENING_TYPE
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|| prevt == PUNCTUATION_TYPE)
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list.p[i]->spacing_type = ORDINARY_TYPE;
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}
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// 7
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else if ((t == RELATION_TYPE || t == CLOSING_TYPE
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|| t == PUNCTUATION_TYPE)
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&& i > 0 && list.p[i-1]->spacing_type == BINARY_TYPE)
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list.p[i-1]->spacing_type = ORDINARY_TYPE;
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}
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for (i = 0; i < list.len; i++) {
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unsigned flags = 0;
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if (i - 1 >= 0 && list.p[i - 1]->right_is_italic())
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flags |= HINT_PREV_IS_ITALIC;
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if (i + 1 < list.len && list.p[i + 1]->left_is_italic())
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flags |= HINT_NEXT_IS_ITALIC;
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if (flags)
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list.p[i]->hint(flags);
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}
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is_script = (style <= SCRIPT_STYLE);
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int total_spacing = 0;
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for (i = 1; i < list.len; i++)
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total_spacing += compute_spacing(is_script, list.p[i-1]->spacing_type,
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list.p[i]->spacing_type);
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int res = 0;
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for (i = 0; i < list.len; i++)
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if (!list.p[i]->is_simple()) {
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int r = list.p[i]->compute_metrics(style);
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if (r) {
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if (res)
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error("multiple marks and lineups");
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else {
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compute_sublist_width(i);
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printf(".nr " MARK_REG " +\\n[" TEMP_REG"]\n");
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res = r;
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}
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}
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}
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printf(".nr " WIDTH_FORMAT " %dM", uid, total_spacing);
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for (i = 0; i < list.len; i++)
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if (!list.p[i]->is_simple())
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printf("+\\n[" WIDTH_FORMAT "]", list.p[i]->uid);
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printf("\n");
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printf(".nr " HEIGHT_FORMAT " 0", uid);
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for (i = 0; i < list.len; i++)
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if (!list.p[i]->is_simple())
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printf(">?\\n[" HEIGHT_FORMAT "]", list.p[i]->uid);
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printf("\n");
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printf(".nr " DEPTH_FORMAT " 0", uid);
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for (i = 0; i < list.len; i++)
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if (!list.p[i]->is_simple())
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printf(">?\\n[" DEPTH_FORMAT "]", list.p[i]->uid);
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printf("\n");
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int have_simple = 0;
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for (i = 0; i < list.len && !have_simple; i++)
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have_simple = list.p[i]->is_simple();
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if (have_simple) {
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printf(".nr " WIDTH_FORMAT " +\\w" DELIMITER_CHAR, uid);
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for (int i = 0; i < list.len; i++)
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if (list.p[i]->is_simple())
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list.p[i]->output();
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printf(DELIMITER_CHAR "\n");
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printf(".nr " HEIGHT_FORMAT " \\n[rst]>?\\n[" HEIGHT_FORMAT "]\n",
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uid, uid);
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printf(".nr " DEPTH_FORMAT " 0-\\n[rsb]>?\\n[" DEPTH_FORMAT "]\n",
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uid, uid);
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}
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return res;
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}
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void list_box::compute_sublist_width(int n)
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{
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int total_spacing = 0;
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int i;
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for (i = 1; i < n + 1 && i < list.len; i++)
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total_spacing += compute_spacing(is_script, list.p[i-1]->spacing_type,
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list.p[i]->spacing_type);
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printf(".nr " TEMP_REG " %dM", total_spacing);
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for (i = 0; i < n; i++)
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if (!list.p[i]->is_simple())
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printf("+\\n[" WIDTH_FORMAT "]", list.p[i]->uid);
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int have_simple = 0;
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for (i = 0; i < n && !have_simple; i++)
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have_simple = list.p[i]->is_simple();
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if (have_simple) {
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printf("+\\w" DELIMITER_CHAR);
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for (int i = 0; i < n; i++)
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if (list.p[i]->is_simple())
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list.p[i]->output();
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printf(DELIMITER_CHAR);
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}
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printf("\n");
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}
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void list_box::compute_subscript_kern()
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{
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// We can only call compute_subscript_kern if we have called
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// compute_metrics first.
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if (list.p[list.len-1]->is_simple())
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list.p[list.len-1]->compute_metrics(sty);
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list.p[list.len-1]->compute_subscript_kern();
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printf(".nr " SUB_KERN_FORMAT " \\n[" SUB_KERN_FORMAT "]\n",
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uid, list.p[list.len-1]->uid);
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}
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void list_box::output()
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{
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for (int i = 0; i < list.len; i++) {
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if (i > 0) {
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int n = compute_spacing(is_script,
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list.p[i-1]->spacing_type,
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list.p[i]->spacing_type);
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if (n > 0)
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printf("\\h'%dM'", n);
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}
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list.p[i]->output();
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}
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}
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void list_box::handle_char_type(int st, int ft)
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{
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for (int i = 0; i < list.len; i++)
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list.p[i]->handle_char_type(st, ft);
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}
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void list_box::debug_print()
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{
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list.list_debug_print(" ");
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}
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void list_box::check_tabs(int level)
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{
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list.list_check_tabs(level);
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}
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