freebsd-skq/contrib/groff/troff/env.h

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1996-09-07 16:18:32 +00:00
// -*- 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. */
struct size_range {
int min;
int max;
};
class font_size {
static size_range *size_table;
static int nranges;
int p;
public:
font_size();
font_size(int points);
int to_points();
int to_scaled_points();
int to_units();
int operator==(font_size);
int operator!=(font_size);
static void init_size_table(int *sizes);
};
inline font_size::font_size() : p(0)
{
}
inline int font_size::operator==(font_size fs)
{
return p == fs.p;
}
inline int font_size::operator!=(font_size fs)
{
return p != fs.p;
}
inline int font_size::to_scaled_points()
{
return p;
}
inline int font_size::to_points()
{
return p/sizescale;
}
struct environment;
hunits env_digit_width(environment *);
hunits env_space_width(environment *);
hunits env_sentence_space_width(environment *);
hunits env_narrow_space_width(environment *);
hunits env_half_narrow_space_width(environment *);
struct tab;
enum tab_type { TAB_NONE, TAB_LEFT, TAB_CENTER, TAB_RIGHT };
class tab_stops {
tab *initial_list;
tab *repeated_list;
public:
tab_stops();
tab_stops(hunits distance, tab_type type);
tab_stops(const tab_stops &);
~tab_stops();
void operator=(const tab_stops &);
tab_type distance_to_next_tab(hunits pos, hunits *distance);
void clear();
void add_tab(hunits pos, tab_type type, int repeated);
const char *to_string();
};
const unsigned MARGIN_CHARACTER_ON = 1;
const unsigned MARGIN_CHARACTER_NEXT = 2;
struct charinfo;
struct node;
struct breakpoint;
struct font_family;
struct pending_output_line;
class environment {
int dummy; // dummy environment used for \w
hunits prev_line_length;
hunits line_length;
hunits prev_title_length;
hunits title_length;
font_size prev_size;
font_size size;
int requested_size;
int prev_requested_size;
int char_height;
int char_slant;
int prev_fontno;
int fontno;
font_family *prev_family;
font_family *family;
int space_size; // in 36ths of an em
int sentence_space_size; // same but for spaces at the end of sentences
int adjust_mode;
int fill;
int interrupted;
int prev_line_interrupted;
int center_lines;
int right_justify_lines;
vunits prev_vertical_spacing;
vunits vertical_spacing;
vunits prev_post_vertical_spacing;
vunits post_vertical_spacing;
int prev_line_spacing;
int line_spacing;
hunits prev_indent;
hunits indent;
hunits temporary_indent;
int have_temporary_indent;
hunits saved_indent;
hunits target_text_length;
int pre_underline_fontno;
int underline_lines;
symbol input_trap;
int input_trap_count;
node *line; // in reverse order
hunits prev_text_length;
hunits width_total;
int space_total;
hunits input_line_start;
tab_stops tabs;
node *tab_contents;
hunits tab_width;
hunits tab_distance;
tab_type current_tab;
node *leader_node;
charinfo *tab_char;
charinfo *leader_char;
int current_field; // is there a current field?
hunits field_distance;
hunits pre_field_width;
int field_spaces;
int tab_field_spaces;
int tab_precedes_field;
int discarding;
int spread_flag; // set by \p
unsigned margin_character_flags;
node *margin_character_node;
hunits margin_character_distance;
node *numbering_nodes;
hunits line_number_digit_width;
int number_text_separation; // in digit spaces
int line_number_indent; // in digit spaces
int line_number_multiple;
int no_number_count;
unsigned hyphenation_flags;
int hyphen_line_count;
int hyphen_line_max;
hunits hyphenation_space;
hunits hyphenation_margin;
int composite; // used for construction of composite char?
pending_output_line *pending_lines;
#ifdef WIDOW_CONTROL
int widow_control;
#endif /* WIDOW_CONTROL */
tab_type distance_to_next_tab(hunits *);
void start_line();
void output_line(node *, hunits);
void output(node *nd, int retain_size, vunits vs, vunits post_vs,
hunits width);
void output_title(node *nd, int retain_size, vunits vs, vunits post_vs,
hunits width);
#ifdef WIDOW_CONTROL
void mark_last_line();
#endif /* WIDOW_CONTROL */
void possibly_break_line(int forced = 0);
breakpoint *choose_breakpoint();
void hyphenate_line();
void start_field();
void wrap_up_field();
void add_padding();
node *make_tab_node(hunits d, node *next = 0);
node *get_prev_char();
public:
const symbol name;
unsigned char control_char;
unsigned char no_break_control_char;
charinfo *hyphen_indicator_char;
environment(symbol);
environment(const environment *); // for temporary environment
~environment();
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void copy(const environment *);
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int is_dummy() { return dummy; }
int is_empty();
int is_composite() { return composite; }
void set_composite() { composite = 1; }
vunits get_vertical_spacing(); // .v
vunits get_post_vertical_spacing(); // .pvs
int get_line_spacing(); // .L
vunits total_post_vertical_spacing();
int get_point_size() { return size.to_scaled_points(); }
font_size get_font_size() { return size; }
int get_size() { return size.to_units(); }
int get_requested_point_size() { return requested_size; }
int get_char_height() { return char_height; }
int get_char_slant() { return char_slant; }
hunits get_digit_width();
int get_font() { return fontno; }; // .f
font_family *get_family() { return family; }
int get_bold(); // .b
int get_adjust_mode(); // .j
int get_fill(); // .u
hunits get_indent(); // .i
hunits get_temporary_indent();
hunits get_line_length(); // .l
hunits get_saved_line_length(); // .ll
hunits get_saved_indent(); // .in
hunits get_title_length();
hunits get_prev_char_width(); // .w
hunits get_prev_char_skew();
vunits get_prev_char_height();
vunits get_prev_char_depth();
hunits get_text_length(); // .k
hunits get_prev_text_length(); // .n
hunits get_space_width() { return env_space_width(this); }
int get_space_size() { return space_size; } // in ems/36
int get_sentence_space_size() { return sentence_space_size; }
hunits get_narrow_space_width() { return env_narrow_space_width(this); }
hunits get_half_narrow_space_width()
{ return env_half_narrow_space_width(this); }
hunits get_input_line_position();
const char *get_tabs();
int get_hyphenation_flags();
int get_hyphen_line_max();
int get_hyphen_line_count();
hunits get_hyphenation_space();
hunits get_hyphenation_margin();
int get_center_lines();
int get_right_justify_lines();
int get_prev_line_interrupted() { return prev_line_interrupted; }
node *make_char_node(charinfo *);
node *extract_output_line();
void width_registers();
void wrap_up_tab();
void set_font(int);
void set_font(symbol);
void set_family(symbol);
void set_size(int);
void set_char_height(int);
void set_char_slant(int);
void set_input_line_position(hunits); // used by \n(hp
void interrupt();
void spread() { spread_flag = 1; }
void do_break(); // .br
void final_break();
void newline();
void handle_tab(int is_leader = 0); // do a tab or leader
void add_node(node *);
void add_char(charinfo *);
void add_hyphen_indicator();
void add_italic_correction();
void space();
void space_newline();
const char *get_font_family_string();
const char *get_name_string();
const char *get_point_size_string();
const char *get_requested_point_size_string();
void output_pending_lines();
friend void title_length();
friend void space_size();
friend void fill();
friend void no_fill();
friend void adjust();
friend void no_adjust();
friend void center();
friend void right_justify();
friend void vertical_spacing();
friend void post_vertical_spacing();
friend void line_spacing();
friend void line_length();
friend void indent();
friend void temporary_indent();
friend void underline();
friend void input_trap();
friend void set_tabs();
friend void margin_character();
friend void no_number();
friend void number_lines();
friend void leader_character();
friend void tab_character();
friend void hyphenate_request();
friend void no_hyphenate();
friend void hyphen_line_max_request();
friend void hyphenation_space_request();
friend void hyphenation_margin_request();
friend void line_width();
#if 0
friend void tabs_save();
friend void tabs_restore();
#endif
friend void title();
#ifdef WIDOW_CONTROL
friend void widow_control_request();
#endif /* WIDOW_CONTROL */
};
extern environment *curenv;
extern void pop_env();
extern void push_env(int);
void init_environments();
void read_hyphen_file(const char *name);
extern int break_flag;
extern symbol default_family;
extern int translate_space_to_dummy;