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733 lines
14 KiB
C++
733 lines
14 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, 675 Mass Ave, Cambridge, MA 02139, USA. */
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#ifdef COLUMN
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#include "troff.h"
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#include "symbol.h"
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#include "dictionary.h"
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#include "hvunits.h"
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#include "env.h"
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#include "request.h"
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#include "node.h"
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#include "token.h"
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#include "div.h"
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#include "reg.h"
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#include "stringclass.h"
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void output_file::vjustify(vunits, symbol)
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{
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// do nothing
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}
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struct justification_spec;
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struct output_line;
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class column : public output_file {
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private:
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output_file *out;
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vunits bottom;
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output_line *col;
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output_line **tail;
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void add_output_line(output_line *);
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void begin_page(int pageno, vunits page_length);
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void flush();
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void print_line(hunits, vunits, node *, vunits, vunits);
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void vjustify(vunits, symbol);
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void transparent_char(unsigned char c);
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void copy_file(hunits, vunits, const char *);
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int is_printing();
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void check_bottom();
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public:
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column();
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~column();
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void start();
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void output();
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void justify(const justification_spec &);
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void trim();
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void reset();
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vunits get_bottom();
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vunits get_last_extra_space();
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int is_active() { return out != 0; }
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};
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column *the_column = 0;
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struct transparent_output_line;
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struct vjustify_output_line;
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class output_line {
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output_line *next;
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public:
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output_line();
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virtual ~output_line();
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virtual void output(output_file *, vunits);
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virtual transparent_output_line *as_transparent_output_line();
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virtual vjustify_output_line *as_vjustify_output_line();
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virtual vunits distance();
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virtual vunits height();
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virtual void reset();
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virtual vunits extra_space(); // post line
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friend class column;
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friend class justification_spec;
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};
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class position_output_line : public output_line {
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vunits dist;
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public:
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position_output_line(vunits);
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vunits distance();
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};
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class node_output_line : public position_output_line {
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node *nd;
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hunits page_offset;
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vunits before;
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vunits after;
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public:
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node_output_line(vunits, node *, hunits, vunits, vunits);
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~node_output_line();
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void output(output_file *, vunits);
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vunits height();
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vunits extra_space();
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};
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class vjustify_output_line : public position_output_line {
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vunits current;
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symbol typ;
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public:
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vjustify_output_line(vunits dist, symbol);
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vunits height();
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vjustify_output_line *as_vjustify_output_line();
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void vary(vunits amount);
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void reset();
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symbol type();
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};
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inline symbol vjustify_output_line::type()
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{
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return typ;
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}
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class copy_file_output_line : public position_output_line {
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symbol filename;
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hunits hpos;
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public:
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copy_file_output_line(vunits, const char *, hunits);
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void output(output_file *, vunits);
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};
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class transparent_output_line : public output_line {
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string buf;
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public:
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transparent_output_line();
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void output(output_file *, vunits);
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void append_char(unsigned char c);
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transparent_output_line *as_transparent_output_line();
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};
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output_line::output_line() : next(0)
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{
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}
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output_line::~output_line()
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{
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}
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void output_line::reset()
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{
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}
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transparent_output_line *output_line::as_transparent_output_line()
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{
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return 0;
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}
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vjustify_output_line *output_line::as_vjustify_output_line()
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{
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return 0;
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}
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void output_line::output(output_file *, vunits)
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{
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}
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vunits output_line::distance()
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{
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return V0;
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}
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vunits output_line::height()
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{
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return V0;
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}
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vunits output_line::extra_space()
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{
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return V0;
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}
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position_output_line::position_output_line(vunits d)
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: dist(d)
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{
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}
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vunits position_output_line::distance()
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{
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return dist;
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}
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node_output_line::node_output_line(vunits d, node *n, hunits po, vunits b, vunits a)
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: position_output_line(d), nd(n), page_offset(po), before(b), after(a)
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{
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}
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node_output_line::~node_output_line()
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{
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delete_node_list(nd);
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}
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void node_output_line::output(output_file *out, vunits pos)
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{
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out->print_line(page_offset, pos, nd, before, after);
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nd = 0;
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}
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vunits node_output_line::height()
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{
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return after;
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}
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vunits node_output_line::extra_space()
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{
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return after;
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}
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vjustify_output_line::vjustify_output_line(vunits d, symbol t)
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: position_output_line(d), typ(t)
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{
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}
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void vjustify_output_line::reset()
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{
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current = V0;
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}
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vunits vjustify_output_line::height()
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{
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return current;
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}
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vjustify_output_line *vjustify_output_line::as_vjustify_output_line()
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{
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return this;
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}
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inline void vjustify_output_line::vary(vunits amount)
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{
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current += amount;
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}
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transparent_output_line::transparent_output_line()
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{
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}
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transparent_output_line *transparent_output_line::as_transparent_output_line()
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{
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return this;
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}
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void transparent_output_line::append_char(unsigned char c)
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{
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assert(c != 0);
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buf += c;
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}
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void transparent_output_line::output(output_file *out, vunits)
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{
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int len = buf.length();
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for (int i = 0; i < len; i++)
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out->transparent_char(buf[i]);
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}
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copy_file_output_line::copy_file_output_line(vunits d, const char *f, hunits h)
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: position_output_line(d), hpos(h), filename(f)
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{
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}
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void copy_file_output_line::output(output_file *out, vunits pos)
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{
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out->copy_file(hpos, pos, filename.contents());
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}
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column::column()
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: bottom(V0), col(0), tail(&col), out(0)
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{
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}
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column::~column()
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{
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assert(out != 0);
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error("automatically outputting column before exiting");
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output();
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delete the_output;
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}
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void column::start()
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{
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assert(out == 0);
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if (!the_output)
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init_output();
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assert(the_output != 0);
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out = the_output;
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the_output = this;
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}
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void column::begin_page(int pageno, vunits page_length)
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{
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assert(out != 0);
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if (col) {
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error("automatically outputting column before beginning next page");
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output();
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the_output->begin_page(pageno, page_length);
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}
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else
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out->begin_page(pageno, page_length);
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}
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void column::flush()
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{
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assert(out != 0);
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out->flush();
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}
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int column::is_printing()
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{
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assert(out != 0);
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return out->is_printing();
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}
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vunits column::get_bottom()
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{
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return bottom;
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}
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void column::add_output_line(output_line *ln)
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{
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*tail = ln;
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bottom += ln->distance();
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bottom += ln->height();
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ln->next = 0;
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tail = &(*tail)->next;
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}
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void column::print_line(hunits page_offset, vunits pos, node *nd,
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vunits before, vunits after)
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{
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assert(out != 0);
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add_output_line(new node_output_line(pos - bottom, nd, page_offset, before, after));
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}
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void column::vjustify(vunits pos, symbol typ)
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{
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assert(out != 0);
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add_output_line(new vjustify_output_line(pos - bottom, typ));
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}
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void column::transparent_char(unsigned char c)
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{
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assert(out != 0);
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transparent_output_line *tl = 0;
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if (*tail)
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tl = (*tail)->as_transparent_output_line();
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if (!tl) {
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tl = new transparent_output_line;
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add_output_line(tl);
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}
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tl->append_char(c);
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}
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void column::copy_file(hunits page_offset, vunits pos, const char *filename)
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{
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assert(out != 0);
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add_output_line(new copy_file_output_line(pos - bottom, filename, page_offset));
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}
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void column::trim()
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{
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output_line **spp = 0;
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for (output_line **pp = &col; *pp; pp = &(*pp)->next)
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if ((*pp)->as_vjustify_output_line() == 0)
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spp = 0;
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else if (!spp)
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spp = pp;
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if (spp) {
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output_line *ln = *spp;
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*spp = 0;
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tail = spp;
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while (ln) {
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output_line *tem = ln->next;
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bottom -= ln->distance();
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bottom -= ln->height();
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delete ln;
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ln = tem;
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}
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}
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}
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void column::reset()
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{
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bottom = V0;
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for (output_line *ln = col; ln; ln = ln->next) {
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bottom += ln->distance();
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ln->reset();
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bottom += ln->height();
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}
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}
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void column::check_bottom()
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{
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vunits b;
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for (output_line *ln = col; ln; ln = ln->next) {
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b += ln->distance();
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b += ln->height();
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}
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assert(b == bottom);
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}
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void column::output()
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{
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assert(out != 0);
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vunits vpos(V0);
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output_line *ln = col;
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while (ln) {
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vpos += ln->distance();
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ln->output(out, vpos);
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vpos += ln->height();
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output_line *tem = ln->next;
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delete ln;
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ln = tem;
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}
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tail = &col;
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bottom = V0;
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col = 0;
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the_output = out;
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out = 0;
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}
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vunits column::get_last_extra_space()
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{
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if (!col)
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return V0;
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for (output_line *p = col; p->next; p = p->next)
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;
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return p->extra_space();
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}
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class justification_spec {
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vunits height;
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symbol *type;
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vunits *amount;
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int n;
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int maxn;
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public:
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justification_spec(vunits);
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~justification_spec();
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void append(symbol t, vunits v);
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void justify(output_line *, vunits *bottomp) const;
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};
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justification_spec::justification_spec(vunits h)
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: height(h), n(0), maxn(10)
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{
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type = new symbol[maxn];
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amount = new vunits[maxn];
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}
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justification_spec::~justification_spec()
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{
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a_delete type;
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a_delete amount;
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}
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void justification_spec::append(symbol t, vunits v)
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{
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if (v <= V0) {
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if (v < V0)
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warning(WARN_RANGE,
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"maximum space for vertical justification must not be negative");
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else
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warning(WARN_RANGE,
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"maximum space for vertical justification must not be zero");
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return;
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}
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if (n >= maxn) {
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maxn *= 2;
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symbol *old_type = type;
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type = new symbol[maxn];
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int i;
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for (i = 0; i < n; i++)
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type[i] = old_type[i];
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a_delete old_type;
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vunits *old_amount = amount;
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amount = new vunits[maxn];
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for (i = 0; i < n; i++)
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amount[i] = old_amount[i];
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a_delete old_amount;
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}
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assert(n < maxn);
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type[n] = t;
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amount[n] = v;
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n++;
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}
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void justification_spec::justify(output_line *col, vunits *bottomp) const
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{
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if (*bottomp >= height)
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return;
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vunits total;
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output_line *p;
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for (p = col; p; p = p->next) {
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vjustify_output_line *sp = p->as_vjustify_output_line();
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if (sp) {
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symbol t = sp->type();
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for (int i = 0; i < n; i++) {
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if (t == type[i])
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total += amount[i];
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}
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}
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}
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vunits gap = height - *bottomp;
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for (p = col; p; p = p->next) {
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vjustify_output_line *sp = p->as_vjustify_output_line();
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if (sp) {
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symbol t = sp->type();
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for (int i = 0; i < n; i++) {
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if (t == type[i]) {
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if (total <= gap) {
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sp->vary(amount[i]);
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gap -= amount[i];
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}
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else {
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// gap < total
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vunits v = scale(amount[i], gap, total);
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sp->vary(v);
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gap -= v;
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}
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total -= amount[i];
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}
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}
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}
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}
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assert(total == V0);
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*bottomp = height - gap;
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}
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void column::justify(const justification_spec &js)
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{
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check_bottom();
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js.justify(col, &bottom);
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check_bottom();
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}
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void column_justify()
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{
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vunits height;
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if (!the_column->is_active())
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error("can't justify column - column not active");
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else if (get_vunits(&height, 'v')) {
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justification_spec js(height);
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symbol nm = get_long_name(1);
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if (!nm.is_null()) {
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vunits v;
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if (get_vunits(&v, 'v')) {
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js.append(nm, v);
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int err = 0;
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while (has_arg()) {
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nm = get_long_name(1);
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if (nm.is_null()) {
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err = 1;
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break;
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}
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if (!get_vunits(&v, 'v')) {
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err = 1;
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break;
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}
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js.append(nm, v);
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}
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if (!err)
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the_column->justify(js);
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}
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}
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}
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skip_line();
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}
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void column_start()
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{
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if (the_column->is_active())
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error("can't start column - column already active");
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else
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the_column->start();
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skip_line();
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}
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void column_output()
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{
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if (!the_column->is_active())
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error("can't output column - column not active");
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else
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the_column->output();
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skip_line();
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}
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void column_trim()
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{
|
|
if (!the_column->is_active())
|
|
error("can't trim column - column not active");
|
|
else
|
|
the_column->trim();
|
|
skip_line();
|
|
}
|
|
|
|
void column_reset()
|
|
{
|
|
if (!the_column->is_active())
|
|
error("can't reset column - column not active");
|
|
else
|
|
the_column->reset();
|
|
skip_line();
|
|
}
|
|
|
|
class column_bottom_reg : public reg {
|
|
public:
|
|
const char *get_string();
|
|
};
|
|
|
|
const char *column_bottom_reg::get_string()
|
|
{
|
|
return itoa(the_column->get_bottom().to_units());
|
|
}
|
|
|
|
class column_extra_space_reg : public reg {
|
|
public:
|
|
const char *get_string();
|
|
};
|
|
|
|
const char *column_extra_space_reg::get_string()
|
|
{
|
|
return itoa(the_column->get_last_extra_space().to_units());
|
|
}
|
|
|
|
class column_active_reg : public reg {
|
|
public:
|
|
const char *get_string();
|
|
};
|
|
|
|
const char *column_active_reg::get_string()
|
|
{
|
|
return the_column->is_active() ? "1" : "0";
|
|
}
|
|
|
|
static int no_vjustify_mode = 0;
|
|
|
|
class vjustify_node : public node {
|
|
symbol typ;
|
|
public:
|
|
vjustify_node(symbol);
|
|
int reread(int *);
|
|
const char *type();
|
|
int same(node *);
|
|
node *copy();
|
|
};
|
|
|
|
vjustify_node::vjustify_node(symbol t)
|
|
: typ(t)
|
|
{
|
|
}
|
|
|
|
node *vjustify_node::copy()
|
|
{
|
|
return new vjustify_node(typ);
|
|
}
|
|
|
|
const char *vjustify_node::type()
|
|
{
|
|
return "vjustify_node";
|
|
}
|
|
|
|
int vjustify_node::same(node *nd)
|
|
{
|
|
return typ == ((vjustify_node *)nd)->typ;
|
|
}
|
|
|
|
int vjustify_node::reread(int *bolp)
|
|
{
|
|
curdiv->vjustify(typ);
|
|
*bolp = 1;
|
|
return 1;
|
|
}
|
|
|
|
void macro_diversion::vjustify(symbol type)
|
|
{
|
|
if (!no_vjustify_mode)
|
|
mac->append(new vjustify_node(type));
|
|
}
|
|
|
|
void top_level_diversion::vjustify(symbol type)
|
|
{
|
|
if (no_space_mode || no_vjustify_mode)
|
|
return;
|
|
assert(first_page_begun); // I'm not sure about this.
|
|
the_output->vjustify(vertical_position, type);
|
|
}
|
|
|
|
void no_vjustify()
|
|
{
|
|
skip_line();
|
|
no_vjustify_mode = 1;
|
|
}
|
|
|
|
void restore_vjustify()
|
|
{
|
|
skip_line();
|
|
no_vjustify_mode = 0;
|
|
}
|
|
|
|
void init_column_requests()
|
|
{
|
|
the_column = new column;
|
|
init_request("cols", column_start);
|
|
init_request("colo", column_output);
|
|
init_request("colj", column_justify);
|
|
init_request("colr", column_reset);
|
|
init_request("colt", column_trim);
|
|
init_request("nvj", no_vjustify);
|
|
init_request("rvj", restore_vjustify);
|
|
number_reg_dictionary.define(".colb", new column_bottom_reg);
|
|
number_reg_dictionary.define(".colx", new column_extra_space_reg);
|
|
number_reg_dictionary.define(".cola", new column_active_reg);
|
|
number_reg_dictionary.define(".nvj",
|
|
new constant_int_reg(&no_vjustify_mode));
|
|
}
|
|
|
|
#endif /* COLUMN */
|