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| Current File : //usr/src/contrib/groff/src/devices/grohtml/post-html.cpp |
// -*- C++ -*-
/* Copyright (C) 2000, 2001, 2002, 2003, 2004, 2005
* Free Software Foundation, Inc.
*
* Gaius Mulley (gaius@glam.ac.uk) wrote post-html.cpp
* but it owes a huge amount of ideas and raw code from
* James Clark (jjc@jclark.com) grops/ps.cpp.
*/
/*
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, 51 Franklin St - Fifth Floor, Boston, MA 02110-1301, USA. */
#include "driver.h"
#include "stringclass.h"
#include "cset.h"
#include "html.h"
#include "html-text.h"
#include "html-table.h"
#include <time.h>
#ifdef HAVE_UNISTD_H
#include <unistd.h>
#endif
#include <stdio.h>
#include <fcntl.h>
#include <string.h>
extern "C" const char *Version_string;
#if !defined(TRUE)
# define TRUE (1==1)
#endif
#if !defined(FALSE)
# define FALSE (1==0)
#endif
#define MAX_LINE_LENGTH 60 /* maximum characters we want in a line */
#define SIZE_INCREMENT 2 /* font size increment <big> = +2 */
#define CENTER_TOLERANCE 2 /* how many pixels off center do we allow */
#define ANCHOR_TEMPLATE "heading" /* if simple anchor is set we use this */
#define UNICODE_DESC_START 0x80 /* all character entities above this are */
/* either encoded by their glyph names or if */
/* there is no name then we use &#nnn; */
typedef enum {CENTERED, LEFT, RIGHT, INLINE} TAG_ALIGNMENT;
typedef enum {col_tag, tab_tag, tab0_tag, none} colType;
#undef DEBUG_TABLES
// #define DEBUG_TABLES
/*
* prototypes
*/
char *get_html_translation (font *f, const string &name);
int char_translate_to_html (font *f, char *buf, int buflen, unsigned char ch, int b, int and_single);
static int auto_links = TRUE; /* by default we enable automatic links at */
/* top of the document. */
static int auto_rule = TRUE; /* by default we enable an automatic rule */
/* at the top and bottom of the document */
static int simple_anchors = FALSE; /* default to anchors with heading text */
static int manufacture_headings = FALSE; /* default is to use the Hn html headings, */
/* rather than manufacture our own. */
static color *default_background = NULL; /* has user requested initial bg color? */
static string job_name; /* if set then the output is split into */
/* multiple files with `job_name'-%d.html */
static int multiple_files = FALSE; /* must we the output be divided into */
/* multiple html files, one for each */
/* heading? */
static int base_point_size = 0; /* which troff font size maps onto html */
/* size 3? */
static int split_level = 2; /* what heading level to split at? */
static string head_info; /* user supplied information to be placed */
/* into <head> </head> */
/*
* start with a few favorites
*/
void stop () {}
static int min (int a, int b)
{
if (a < b)
return a;
else
return b;
}
static int max (int a, int b)
{
if (a > b)
return a;
else
return b;
}
/*
* is_intersection - returns TRUE if range a1..a2 intersects with b1..b2
*/
static int is_intersection (int a1, int a2, int b1, int b2)
{
// easier to prove NOT outside limits
return ! ((a1 > b2) || (a2 < b1));
}
/*
* is_digit - returns TRUE if character, ch, is a digit.
*/
static int is_digit (char ch)
{
return (ch >= '0') && (ch <= '9');
}
/*
* the classes and methods for maintaining a list of files.
*/
struct file {
FILE *fp;
file *next;
int new_output_file;
int require_links;
string output_file_name;
file (FILE *f);
};
/*
* file - initialize all fields to NULL
*/
file::file (FILE *f)
: fp(f), next(NULL), new_output_file(FALSE),
require_links(FALSE), output_file_name("")
{
}
class files {
public:
files ();
FILE *get_file (void);
void start_of_list (void);
void move_next (void);
void add_new_file (FILE *f);
void set_file_name (string name);
void set_links_required (void);
int are_links_required (void);
int is_new_output_file (void);
string file_name (void);
string next_file_name (void);
private:
file *head;
file *tail;
file *ptr;
};
/*
* files - create an empty list of files.
*/
files::files ()
: head(NULL), tail(NULL), ptr(NULL)
{
}
/*
* get_file - returns the FILE associated with ptr.
*/
FILE *files::get_file (void)
{
if (ptr)
return ptr->fp;
else
return NULL;
}
/*
* start_of_list - reset the ptr to the start of the list.
*/
void files::start_of_list (void)
{
ptr = head;
}
/*
* move_next - moves the ptr to the next element on the list.
*/
void files::move_next (void)
{
if (ptr != NULL)
ptr = ptr->next;
}
/*
* add_new_file - adds a new file, f, to the list.
*/
void files::add_new_file (FILE *f)
{
if (head == NULL) {
head = new file(f);
tail = head;
} else {
tail->next = new file(f);
tail = tail->next;
}
ptr = tail;
}
/*
* set_file_name - sets the final file name to contain the html
* data to name.
*/
void files::set_file_name (string name)
{
if (ptr != NULL) {
ptr->output_file_name = name;
ptr->new_output_file = TRUE;
}
}
/*
* set_links_required - issue links when processing this component
* of the file.
*/
void files::set_links_required (void)
{
if (ptr != NULL)
ptr->require_links = TRUE;
}
/*
* are_links_required - returns TRUE if this section of the file
* requires that links should be issued.
*/
int files::are_links_required (void)
{
if (ptr != NULL)
return ptr->require_links;
return FALSE;
}
/*
* is_new_output_file - returns TRUE if this component of the file
* is the start of a new output file.
*/
int files::is_new_output_file (void)
{
if (ptr != NULL)
return ptr->new_output_file;
return FALSE;
}
/*
* file_name - returns the name of the file.
*/
string files::file_name (void)
{
if (ptr != NULL)
return ptr->output_file_name;
return string("");
}
/*
* next_file_name - returns the name of the next file.
*/
string files::next_file_name (void)
{
if (ptr != NULL && ptr->next != NULL)
return ptr->next->output_file_name;
return string("");
}
/*
* the class and methods for styles
*/
struct style {
font *f;
int point_size;
int font_no;
int height;
int slant;
color col;
style ();
style (font *, int, int, int, int, color);
int operator == (const style &) const;
int operator != (const style &) const;
};
style::style()
: f(NULL)
{
}
style::style(font *p, int sz, int h, int sl, int no, color c)
: f(p), point_size(sz), font_no(no), height(h), slant(sl), col(c)
{
}
int style::operator==(const style &s) const
{
return (f == s.f && point_size == s.point_size
&& height == s.height && slant == s.slant && col == s.col);
}
int style::operator!=(const style &s) const
{
return !(*this == s);
}
/*
* the class and methods for retaining ascii text
*/
struct char_block {
enum { SIZE = 256 };
char *buffer;
int used;
char_block *next;
char_block();
char_block(int length);
~char_block();
};
char_block::char_block()
: buffer(NULL), used(0), next(NULL)
{
}
char_block::char_block(int length)
: used(0), next(NULL)
{
buffer = new char[max(length, char_block::SIZE)];
if (buffer == NULL)
fatal("out of memory error");
}
char_block::~char_block()
{
if (buffer != NULL)
a_delete buffer;
}
class char_buffer {
public:
char_buffer();
~char_buffer();
char *add_string(const char *, unsigned int);
char *add_string(const string &);
private:
char_block *head;
char_block *tail;
};
char_buffer::char_buffer()
: head(NULL), tail(NULL)
{
}
char_buffer::~char_buffer()
{
while (head != NULL) {
char_block *temp = head;
head = head->next;
delete temp;
}
}
char *char_buffer::add_string (const char *s, unsigned int length)
{
int i=0;
unsigned int old_used;
if (s == NULL || length == 0)
return NULL;
if (tail == NULL) {
tail = new char_block(length+1);
head = tail;
} else {
if (tail->used + length+1 > char_block::SIZE) {
tail->next = new char_block(length+1);
tail = tail->next;
}
}
old_used = tail->used;
do {
tail->buffer[tail->used] = s[i];
tail->used++;
i++;
length--;
} while (length>0);
// add terminating nul character
tail->buffer[tail->used] = '\0';
tail->used++;
// and return start of new string
return &tail->buffer[old_used];
}
char *char_buffer::add_string (const string &s)
{
return add_string(s.contents(), s.length());
}
/*
* the classes and methods for maintaining glyph positions.
*/
class text_glob {
public:
void text_glob_html (style *s, char *str, int length,
int min_vertical, int min_horizontal,
int max_vertical, int max_horizontal);
void text_glob_special (style *s, char *str, int length,
int min_vertical, int min_horizontal,
int max_vertical, int max_horizontal);
void text_glob_line (style *s,
int min_vertical, int min_horizontal,
int max_vertical, int max_horizontal,
int thickness);
void text_glob_auto_image(style *s, char *str, int length,
int min_vertical, int min_horizontal,
int max_vertical, int max_horizontal);
void text_glob_tag (style *s, char *str, int length,
int min_vertical, int min_horizontal,
int max_vertical, int max_horizontal);
text_glob (void);
~text_glob (void);
int is_a_line (void);
int is_a_tag (void);
int is_eol (void);
int is_auto_img (void);
int is_br (void);
int is_in (void);
int is_po (void);
int is_ti (void);
int is_ll (void);
int is_ce (void);
int is_tl (void);
int is_eo_tl (void);
int is_eol_ce (void);
int is_col (void);
int is_tab (void);
int is_tab0 (void);
int is_ta (void);
int is_tab_ts (void);
int is_tab_te (void);
int is_nf (void);
int is_fi (void);
int is_eo_h (void);
int get_arg (void);
int get_tab_args (char *align);
void remember_table (html_table *t);
html_table *get_table (void);
style text_style;
const char *text_string;
unsigned int text_length;
int minv, minh, maxv, maxh;
int is_tag; // is this a .br, .sp, .tl etc
int is_img_auto; // image created by eqn delim
int is_special; // text has come via 'x X html:'
int is_line; // is the command a <line>?
int thickness; // the thickness of a line
html_table *tab; // table description
private:
text_glob (style *s, const char *str, int length,
int min_vertical , int min_horizontal,
int max_vertical , int max_horizontal,
bool is_troff_command,
bool is_auto_image, bool is_special_command,
bool is_a_line , int thickness);
};
text_glob::text_glob (style *s, const char *str, int length,
int min_vertical, int min_horizontal,
int max_vertical, int max_horizontal,
bool is_troff_command,
bool is_auto_image, bool is_special_command,
bool is_a_line_flag, int line_thickness)
: text_style(*s), text_string(str), text_length(length),
minv(min_vertical), minh(min_horizontal), maxv(max_vertical), maxh(max_horizontal),
is_tag(is_troff_command), is_img_auto(is_auto_image), is_special(is_special_command),
is_line(is_a_line_flag), thickness(line_thickness), tab(NULL)
{
}
text_glob::text_glob ()
: text_string(NULL), text_length(0), minv(-1), minh(-1), maxv(-1), maxh(-1),
is_tag(FALSE), is_special(FALSE), is_line(FALSE), thickness(0), tab(NULL)
{
}
text_glob::~text_glob ()
{
if (tab != NULL)
delete tab;
}
/*
* text_glob_html - used to place html text into the glob buffer.
*/
void text_glob::text_glob_html (style *s, char *str, int length,
int min_vertical , int min_horizontal,
int max_vertical , int max_horizontal)
{
text_glob *g = new text_glob(s, str, length,
min_vertical, min_horizontal, max_vertical, max_horizontal,
FALSE, FALSE, FALSE, FALSE, 0);
*this = *g;
delete g;
}
/*
* text_glob_html - used to place html specials into the glob buffer.
* This text is essentially html commands coming through
* from the macro sets, with special designated sequences of
* characters translated into html. See add_and_encode.
*/
void text_glob::text_glob_special (style *s, char *str, int length,
int min_vertical , int min_horizontal,
int max_vertical , int max_horizontal)
{
text_glob *g = new text_glob(s, str, length,
min_vertical, min_horizontal, max_vertical, max_horizontal,
FALSE, FALSE, TRUE, FALSE, 0);
*this = *g;
delete g;
}
/*
* text_glob_line - record horizontal draw line commands.
*/
void text_glob::text_glob_line (style *s,
int min_vertical , int min_horizontal,
int max_vertical , int max_horizontal,
int thickness_value)
{
text_glob *g = new text_glob(s, "", 0,
min_vertical, min_horizontal, max_vertical, max_horizontal,
FALSE, FALSE, FALSE, TRUE, thickness_value);
*this = *g;
delete g;
}
/*
* text_glob_auto_image - record the presence of a .auto-image tag command.
* Used to mark that an image has been created automatically
* by a preprocessor and (pre-grohtml/troff) combination.
* Under some circumstances images may not be created.
* (consider .EQ
* delim $$
* .EN
* .TS
* tab(!), center;
* l!l.
* $1 over x$!recripical of x
* .TE
*
* the first auto-image marker is created via .EQ/.EN pair
* and no image is created.
* The second auto-image marker occurs at $1 over x$
* Currently this image will not be created
* as the whole of the table is created as an image.
* (Once html tables are handled by grohtml this will change.
* Shortly this will be the case).
*/
void text_glob::text_glob_auto_image(style *s, char *str, int length,
int min_vertical, int min_horizontal,
int max_vertical, int max_horizontal)
{
text_glob *g = new text_glob(s, str, length,
min_vertical, min_horizontal, max_vertical, max_horizontal,
TRUE, TRUE, FALSE, FALSE, 0);
*this = *g;
delete g;
}
/*
* text_glob_tag - records a troff tag.
*/
void text_glob::text_glob_tag (style *s, char *str, int length,
int min_vertical, int min_horizontal,
int max_vertical, int max_horizontal)
{
text_glob *g = new text_glob(s, str, length,
min_vertical, min_horizontal, max_vertical, max_horizontal,
TRUE, FALSE, FALSE, FALSE, 0);
*this = *g;
delete g;
}
/*
* is_a_line - returns TRUE if glob should be converted into an <hr>
*/
int text_glob::is_a_line (void)
{
return is_line;
}
/*
* is_a_tag - returns TRUE if glob contains a troff directive.
*/
int text_glob::is_a_tag (void)
{
return is_tag;
}
/*
* is_eol - returns TRUE if glob contains the tag eol
*/
int text_glob::is_eol (void)
{
return is_tag && (strcmp(text_string, "devtag:.eol") == 0);
}
/*
* is_eol_ce - returns TRUE if glob contains the tag eol.ce
*/
int text_glob::is_eol_ce (void)
{
return is_tag && (strcmp(text_string, "devtag:eol.ce") == 0);
}
/*
* is_tl - returns TRUE if glob contains the tag .tl
*/
int text_glob::is_tl (void)
{
return is_tag && (strcmp(text_string, "devtag:.tl") == 0);
}
/*
* is_eo_tl - returns TRUE if glob contains the tag eo.tl
*/
int text_glob::is_eo_tl (void)
{
return is_tag && (strcmp(text_string, "devtag:.eo.tl") == 0);
}
/*
* is_nf - returns TRUE if glob contains the tag .fi 0
*/
int text_glob::is_nf (void)
{
return is_tag && (strncmp(text_string, "devtag:.fi",
strlen("devtag:.fi")) == 0) &&
(get_arg() == 0);
}
/*
* is_fi - returns TRUE if glob contains the tag .fi 1
*/
int text_glob::is_fi (void)
{
return( is_tag && (strncmp(text_string, "devtag:.fi",
strlen("devtag:.fi")) == 0) &&
(get_arg() == 1) );
}
/*
* is_eo_h - returns TRUE if glob contains the tag .eo.h
*/
int text_glob::is_eo_h (void)
{
return is_tag && (strcmp(text_string, "devtag:.eo.h") == 0);
}
/*
* is_ce - returns TRUE if glob contains the tag .ce
*/
int text_glob::is_ce (void)
{
return is_tag && (strncmp(text_string, "devtag:.ce",
strlen("devtag:.ce")) == 0);
}
/*
* is_in - returns TRUE if glob contains the tag .in
*/
int text_glob::is_in (void)
{
return is_tag && (strncmp(text_string, "devtag:.in ",
strlen("devtag:.in ")) == 0);
}
/*
* is_po - returns TRUE if glob contains the tag .po
*/
int text_glob::is_po (void)
{
return is_tag && (strncmp(text_string, "devtag:.po ",
strlen("devtag:.po ")) == 0);
}
/*
* is_ti - returns TRUE if glob contains the tag .ti
*/
int text_glob::is_ti (void)
{
return is_tag && (strncmp(text_string, "devtag:.ti ",
strlen("devtag:.ti ")) == 0);
}
/*
* is_ll - returns TRUE if glob contains the tag .ll
*/
int text_glob::is_ll (void)
{
return is_tag && (strncmp(text_string, "devtag:.ll ",
strlen("devtag:.ll ")) == 0);
}
/*
* is_col - returns TRUE if glob contains the tag .col
*/
int text_glob::is_col (void)
{
return is_tag && (strncmp(text_string, "devtag:.col",
strlen("devtag:.col")) == 0);
}
/*
* is_tab_ts - returns TRUE if glob contains the tag .tab_ts
*/
int text_glob::is_tab_ts (void)
{
return is_tag && (strcmp(text_string, "devtag:.tab-ts") == 0);
}
/*
* is_tab_te - returns TRUE if glob contains the tag .tab_te
*/
int text_glob::is_tab_te (void)
{
return is_tag && (strcmp(text_string, "devtag:.tab-te") == 0);
}
/*
* is_ta - returns TRUE if glob contains the tag .ta
*/
int text_glob::is_ta (void)
{
return is_tag && (strncmp(text_string, "devtag:.ta ",
strlen("devtag:.ta ")) == 0);
}
/*
* is_tab - returns TRUE if glob contains the tag tab
*/
int text_glob::is_tab (void)
{
return is_tag && (strncmp(text_string, "devtag:tab ",
strlen("devtag:tab ")) == 0);
}
/*
* is_tab0 - returns TRUE if glob contains the tag tab0
*/
int text_glob::is_tab0 (void)
{
return is_tag && (strncmp(text_string, "devtag:tab0",
strlen("devtag:tab0")) == 0);
}
/*
* is_auto_img - returns TRUE if the glob contains an automatically
* generated image.
*/
int text_glob::is_auto_img (void)
{
return is_img_auto;
}
/*
* is_br - returns TRUE if the glob is a tag containing a .br
* or an implied .br. Note that we do not include .nf or .fi
* as grohtml will place a .br after these commands if they
* should break the line.
*/
int text_glob::is_br (void)
{
return is_a_tag() && ((strcmp ("devtag:.br", text_string) == 0) ||
(strncmp("devtag:.sp", text_string,
strlen("devtag:.sp")) == 0));
}
int text_glob::get_arg (void)
{
if (strncmp("devtag:", text_string, strlen("devtag:")) == 0) {
const char *p = text_string;
while ((*p != (char)0) && (!isspace(*p)))
p++;
while ((*p != (char)0) && (isspace(*p)))
p++;
if (*p == (char)0)
return -1;
return atoi(p);
}
return -1;
}
/*
* get_tab_args - returns the tab position and alignment of the tab tag
*/
int text_glob::get_tab_args (char *align)
{
if (strncmp("devtag:", text_string, strlen("devtag:")) == 0) {
const char *p = text_string;
// firstly the alignment C|R|L
while ((*p != (char)0) && (!isspace(*p)))
p++;
while ((*p != (char)0) && (isspace(*p)))
p++;
*align = *p;
// now the int value
while ((*p != (char)0) && (!isspace(*p)))
p++;
while ((*p != (char)0) && (isspace(*p)))
p++;
if (*p == (char)0)
return -1;
return atoi(p);
}
return -1;
}
/*
* remember_table - saves table, t, in the text_glob.
*/
void text_glob::remember_table (html_table *t)
{
if (tab != NULL)
delete tab;
tab = t;
}
/*
* get_table - returns the stored table description.
*/
html_table *text_glob::get_table (void)
{
return tab;
}
/*
* the class and methods used to construct ordered double linked
* lists. In a previous implementation we used templates via
* #include "ordered-list.h", but this does assume that all C++
* compilers can handle this feature. Pragmatically it is safer to
* assume this is not the case.
*/
struct element_list {
element_list *right;
element_list *left;
text_glob *datum;
int lineno;
int minv, minh, maxv, maxh;
element_list (text_glob *d,
int line_number,
int min_vertical, int min_horizontal,
int max_vertical, int max_horizontal);
element_list ();
~element_list ();
};
element_list::element_list ()
: right(0), left(0), datum(0), lineno(0), minv(-1), minh(-1), maxv(-1), maxh(-1)
{
}
/*
* element_list - create a list element assigning the datum and region parameters.
*/
element_list::element_list (text_glob *in,
int line_number,
int min_vertical, int min_horizontal,
int max_vertical, int max_horizontal)
: right(0), left(0), datum(in), lineno(line_number),
minv(min_vertical), minh(min_horizontal), maxv(max_vertical), maxh(max_horizontal)
{
}
element_list::~element_list ()
{
if (datum != NULL)
delete datum;
}
class list {
public:
list ();
~list ();
int is_less (element_list *a, element_list *b);
void add (text_glob *in,
int line_number,
int min_vertical, int min_horizontal,
int max_vertical, int max_horizontal);
void sub_move_right (void);
void move_right (void);
void move_left (void);
int is_empty (void);
int is_equal_to_tail (void);
int is_equal_to_head (void);
void start_from_head (void);
void start_from_tail (void);
void insert (text_glob *in);
void move_to (text_glob *in);
text_glob *move_right_get_data (void);
text_glob *move_left_get_data (void);
text_glob *get_data (void);
private:
element_list *head;
element_list *tail;
element_list *ptr;
};
/*
* list - construct an empty list.
*/
list::list ()
: head(NULL), tail(NULL), ptr(NULL)
{
}
/*
* ~list - destroy a complete list.
*/
list::~list()
{
element_list *temp=head;
do {
temp = head;
if (temp != NULL) {
head = head->right;
delete temp;
}
} while ((head != NULL) && (head != tail));
}
/*
* is_less - returns TRUE if a is left of b if on the same line or
* if a is higher up the page than b.
*/
int list::is_less (element_list *a, element_list *b)
{
// was if (is_intersection(a->minv+1, a->maxv-1, b->minv+1, b->maxv-1)) {
if (a->lineno < b->lineno) {
return( TRUE );
} else if (a->lineno > b->lineno) {
return( FALSE );
} else if (is_intersection(a->minv, a->maxv, b->minv, b->maxv)) {
return( a->minh < b->minh );
} else {
return( a->maxv < b->maxv );
}
}
/*
* add - adds a datum to the list in the order specified by the
* region position.
*/
void list::add (text_glob *in, int line_number, int min_vertical, int min_horizontal, int max_vertical, int max_horizontal)
{
// create a new list element with datum and position fields initialized
element_list *t = new element_list(in, line_number, min_vertical, min_horizontal, max_vertical, max_horizontal);
element_list *last;
#if 0
fprintf(stderr, "[%s %d,%d,%d,%d] ",
in->text_string, min_vertical, min_horizontal, max_vertical, max_horizontal);
fflush(stderr);
#endif
if (head == NULL) {
head = t;
tail = t;
ptr = t;
t->left = t;
t->right = t;
} else {
last = tail;
while ((last != head) && (is_less(t, last)))
last = last->left;
if (is_less(t, last)) {
t->right = last;
last->left->right = t;
t->left = last->left;
last->left = t;
// now check for a new head
if (last == head)
head = t;
} else {
// add t beyond last
t->right = last->right;
t->left = last;
last->right->left = t;
last->right = t;
// now check for a new tail
if (last == tail)
tail = t;
}
}
}
/*
* sub_move_right - removes the element which is currently pointed to by ptr
* from the list and moves ptr to the right.
*/
void list::sub_move_right (void)
{
element_list *t=ptr->right;
if (head == tail) {
head = NULL;
if (tail != NULL)
delete tail;
tail = NULL;
ptr = NULL;
} else {
if (head == ptr)
head = head->right;
if (tail == ptr)
tail = tail->left;
ptr->left->right = ptr->right;
ptr->right->left = ptr->left;
ptr = t;
}
}
/*
* start_from_head - assigns ptr to the head.
*/
void list::start_from_head (void)
{
ptr = head;
}
/*
* start_from_tail - assigns ptr to the tail.
*/
void list::start_from_tail (void)
{
ptr = tail;
}
/*
* is_empty - returns TRUE if the list has no elements.
*/
int list::is_empty (void)
{
return head == NULL;
}
/*
* is_equal_to_tail - returns TRUE if the ptr equals the tail.
*/
int list::is_equal_to_tail (void)
{
return ptr == tail;
}
/*
* is_equal_to_head - returns TRUE if the ptr equals the head.
*/
int list::is_equal_to_head (void)
{
return ptr == head;
}
/*
* move_left - moves the ptr left.
*/
void list::move_left (void)
{
ptr = ptr->left;
}
/*
* move_right - moves the ptr right.
*/
void list::move_right (void)
{
ptr = ptr->right;
}
/*
* get_datum - returns the datum referenced via ptr.
*/
text_glob* list::get_data (void)
{
return ptr->datum;
}
/*
* move_right_get_data - returns the datum referenced via ptr and moves
* ptr right.
*/
text_glob* list::move_right_get_data (void)
{
ptr = ptr->right;
if (ptr == head)
return NULL;
else
return ptr->datum;
}
/*
* move_left_get_data - returns the datum referenced via ptr and moves
* ptr right.
*/
text_glob* list::move_left_get_data (void)
{
ptr = ptr->left;
if (ptr == tail)
return NULL;
else
return ptr->datum;
}
/*
* insert - inserts data after the current position.
*/
void list::insert (text_glob *in)
{
if (is_empty())
fatal("list must not be empty if we are inserting data");
else {
if (ptr == NULL)
ptr = head;
element_list *t = new element_list(in, ptr->lineno, ptr->minv, ptr->minh, ptr->maxv, ptr->maxh);
if (ptr == tail)
tail = t;
ptr->right->left = t;
t->right = ptr->right;
ptr->right = t;
t->left = ptr;
}
}
/*
* move_to - moves the current position to the point where data, in, exists.
* This is an expensive method and should be used sparingly.
*/
void list::move_to (text_glob *in)
{
ptr = head;
while (ptr != tail && ptr->datum != in)
ptr = ptr->right;
}
/*
* page class and methods
*/
class page {
public:
page (void);
void add (style *s, const string &str,
int line_number,
int min_vertical, int min_horizontal,
int max_vertical, int max_horizontal);
void add_tag (style *s, const string &str,
int line_number,
int min_vertical, int min_horizontal,
int max_vertical, int max_horizontal);
void add_and_encode (style *s, const string &str,
int line_number,
int min_vertical, int min_horizontal,
int max_vertical, int max_horizontal,
int is_tag);
void add_line (style *s,
int line_number,
int x1, int y1, int x2, int y2,
int thickness);
void insert_tag (const string &str);
void dump_page (void); // debugging method
// and the data
list glyphs; // position of glyphs and specials on page
char_buffer buffer; // all characters for this page
};
page::page()
{
}
/*
* insert_tag - inserts a tag after the current position.
*/
void page::insert_tag (const string &str)
{
if (str.length() > 0) {
text_glob *g=new text_glob();
text_glob *f=glyphs.get_data();
g->text_glob_tag(&f->text_style, buffer.add_string(str), str.length(),
f->minv, f->minh, f->maxv, f->maxh);
glyphs.insert(g);
}
}
/*
* add - add html text to the list of glyphs.
*/
void page::add (style *s, const string &str,
int line_number,
int min_vertical, int min_horizontal,
int max_vertical, int max_horizontal)
{
if (str.length() > 0) {
text_glob *g=new text_glob();
g->text_glob_html(s, buffer.add_string(str), str.length(),
min_vertical, min_horizontal, max_vertical, max_horizontal);
glyphs.add(g, line_number, min_vertical, min_horizontal, max_vertical, max_horizontal);
}
}
/*
* add_tag - adds a troff tag, for example: .tl .sp .br
*/
void page::add_tag (style *s, const string &str,
int line_number,
int min_vertical, int min_horizontal,
int max_vertical, int max_horizontal)
{
if (str.length() > 0) {
text_glob *g;
if (strncmp((str+'\0').contents(), "devtag:.auto-image",
strlen("devtag:.auto-image")) == 0) {
g = new text_glob();
g->text_glob_auto_image(s, buffer.add_string(str), str.length(),
min_vertical, min_horizontal, max_vertical, max_horizontal);
} else {
g = new text_glob();
g->text_glob_tag(s, buffer.add_string(str), str.length(),
min_vertical, min_horizontal, max_vertical, max_horizontal);
}
glyphs.add(g, line_number, min_vertical, min_horizontal, max_vertical, max_horizontal);
}
}
/*
* add_line - adds the <line> primitive providing that y1==y2
*/
void page::add_line (style *s,
int line_number,
int x_1, int y_1, int x_2, int y_2,
int thickness)
{
if (y_1 == y_2) {
text_glob *g = new text_glob();
g->text_glob_line(s,
min(y_1, y_2), min(x_1, x_2),
max(y_1, y_2), max(x_1, x_2),
thickness);
glyphs.add(g, line_number,
min(y_1, y_2), min(x_1, x_2),
max(y_1, y_2), max(x_1, x_2));
}
}
/*
* to_unicode - returns a unicode translation of int, ch.
*/
static char *to_unicode (unsigned int ch)
{
static char buf[30];
sprintf(buf, "&#%u;", ch);
return buf;
}
/*
* add_and_encode - adds a special string to the page, it translates the string
* into html glyphs. The special string will have come from x X html:
* and can contain troff character encodings which appear as
* \(char\). A sequence of \\ represents \.
* So for example we can write:
* "cost = \(Po\)3.00 file = \\foo\\bar"
* which is translated into:
* "cost = £3.00 file = \foo\bar"
*/
void page::add_and_encode (style *s, const string &str,
int line_number,
int min_vertical, int min_horizontal,
int max_vertical, int max_horizontal,
int is_tag)
{
string html_string;
char *html_glyph;
int i=0;
if (s->f == NULL)
return;
while (i < str.length()) {
if ((i+1<str.length()) && (str.substring(i, 2) == string("\\("))) {
// start of escape
i += 2; // move over \(
int a = i;
while ((i+1<str.length()) && (str.substring(i, 2) != string("\\)"))) {
i++;
}
int n = i;
if ((i+1<str.length()) && (str.substring(i, 2) == string("\\)")))
i++;
else
n = -1;
if (n > 0) {
string troff_charname = str.substring(a, n-a);
html_glyph = get_html_translation(s->f, troff_charname);
if (html_glyph)
html_string += html_glyph;
else {
int idx=s->f->name_to_index((troff_charname + '\0').contents());
if (s->f->contains(idx) && (idx != 0))
html_string += s->f->get_code(idx);
}
}
} else
html_string += str[i];
i++;
}
if (html_string.length() > 0) {
text_glob *g=new text_glob();
if (is_tag)
g->text_glob_tag(s, buffer.add_string(html_string),
html_string.length(),
min_vertical, min_horizontal,
max_vertical, max_horizontal);
else
g->text_glob_special(s, buffer.add_string(html_string),
html_string.length(),
min_vertical, min_horizontal,
max_vertical, max_horizontal);
glyphs.add(g, line_number, min_vertical,
min_horizontal, max_vertical, max_horizontal);
}
}
/*
* dump_page - dump the page contents for debugging purposes.
*/
void page::dump_page(void)
{
#if defined(DEBUG_TABLES)
text_glob *old_pos = glyphs.get_data();
text_glob *g;
printf("\n<!--\n");
printf("\n\ndebugging start\n");
glyphs.start_from_head();
do {
g = glyphs.get_data();
if (g->is_tab_ts()) {
printf("\n\n");
if (g->get_table() != NULL)
g->get_table()->dump_table();
}
printf("%s ", g->text_string);
if (g->is_tab_te())
printf("\n\n");
glyphs.move_right();
} while (! glyphs.is_equal_to_head());
glyphs.move_to(old_pos);
printf("\ndebugging end\n\n");
printf("\n-->\n");
fflush(stdout);
#endif
}
/*
* font classes and methods
*/
class html_font : public font {
html_font(const char *);
public:
int encoding_index;
char *encoding;
char *reencoded_name;
~html_font();
static html_font *load_html_font(const char *);
};
html_font *html_font::load_html_font(const char *s)
{
html_font *f = new html_font(s);
if (!f->load()) {
delete f;
return 0;
}
return f;
}
html_font::html_font(const char *nm)
: font(nm)
{
}
html_font::~html_font()
{
}
/*
* a simple class to contain the header to this document
*/
class title_desc {
public:
title_desc ();
~title_desc ();
int has_been_written;
int has_been_found;
int with_h1;
string text;
};
title_desc::title_desc ()
: has_been_written(FALSE), has_been_found(FALSE), with_h1(FALSE)
{
}
title_desc::~title_desc ()
{
}
class header_desc {
public:
header_desc ();
~header_desc ();
int no_of_level_one_headings; // how many .SH or .NH 1 have we found?
int no_of_headings; // how many headings have we found?
char_buffer headings; // all the headings used in the document
list headers; // list of headers built from .NH and .SH
list header_filename; // in which file is this header?
int header_level; // current header level
int written_header; // have we written the header yet?
string header_buffer; // current header text
void write_headings (FILE *f, int force);
};
header_desc::header_desc ()
: no_of_level_one_headings(0), no_of_headings(0),
header_level(2), written_header(0)
{
}
header_desc::~header_desc ()
{
}
/*
* write_headings - emits a list of links for the headings in this document
*/
void header_desc::write_headings (FILE *f, int force)
{
text_glob *g;
if (auto_links || force) {
if (! headers.is_empty()) {
int h=1;
headers.start_from_head();
header_filename.start_from_head();
do {
g = headers.get_data();
fputs("<a href=\"", f);
if (multiple_files && (! header_filename.is_empty())) {
text_glob *fn = header_filename.get_data();
fputs(fn->text_string, f);
}
fputs("#", f);
if (simple_anchors) {
string buffer(ANCHOR_TEMPLATE);
buffer += as_string(h);
buffer += '\0';
fputs(buffer.contents(), f);
} else
fputs(g->text_string, f);
h++;
fputs("\">", f);
fputs(g->text_string, f);
fputs("</a><br>\n", f);
headers.move_right();
if (multiple_files && (! header_filename.is_empty()))
header_filename.move_right();
} while (! headers.is_equal_to_head());
fputs("\n", f);
}
}
}
struct assert_pos {
assert_pos *next;
const char *val;
const char *id;
};
class assert_state {
public:
assert_state ();
~assert_state ();
void addx (const char *c, const char *i, const char *v,
const char *f, const char *l);
void addy (const char *c, const char *i, const char *v,
const char *f, const char *l);
void build(const char *c, const char *v,
const char *f, const char *l);
void check_br (int br);
void check_ce (int ce);
void check_fi (int fi);
void check_sp (int sp);
void reset (void);
private:
int check_br_flag;
int check_ce_flag;
int check_fi_flag;
int check_sp_flag;
const char *val_br;
const char *val_ce;
const char *val_fi;
const char *val_sp;
const char *file_br;
const char *file_ce;
const char *file_fi;
const char *file_sp;
const char *line_br;
const char *line_ce;
const char *line_fi;
const char *line_sp;
assert_pos *xhead;
assert_pos *yhead;
void add (assert_pos **h,
const char *c, const char *i, const char *v,
const char *f, const char *l);
void compare(assert_pos *t,
const char *v, const char *f, const char *l);
void close (const char *c);
void set (const char *c, const char *v,
const char *f, const char *l);
void check_value (const char *s, int v, const char *name,
const char *f, const char *l, int *flag);
int check_value_error (int c, int v, const char *s,
const char *name,
const char *f, const char *l, int flag);
};
assert_state::assert_state ()
{
reset();
val_br = NULL;
val_ce = NULL;
val_fi = NULL;
val_sp = NULL;
file_br = NULL;
file_ce = NULL;
file_fi = NULL;
file_sp = NULL;
line_br = NULL;
line_ce = NULL;
line_fi = NULL;
line_sp = NULL;
xhead = NULL;
yhead = NULL;
}
assert_state::~assert_state ()
{
assert_pos *t;
while (xhead != NULL) {
t = xhead;
xhead = xhead->next;
a_delete (char *)t->val;
a_delete (char *)t->id;
delete t;
}
while (yhead != NULL) {
t = yhead;
yhead = yhead->next;
a_delete (char *)t->val;
a_delete (char *)t->id;
delete t;
}
}
void assert_state::reset (void)
{
check_br_flag = 0;
check_ce_flag = 0;
check_fi_flag = 0;
check_sp_flag = 0;
}
void assert_state::add (assert_pos **h,
const char *c, const char *i, const char *v,
const char *f, const char *l)
{
assert_pos *t = *h;
while (t != NULL) {
if (strcmp(t->id, i) == 0)
break;
t = t->next;
}
if (t != NULL && v != NULL && (v[0] != '='))
compare(t, v, f, l);
else {
if (t == NULL) {
t = new assert_pos;
t->next = *h;
(*h) = t;
}
if (v == NULL || v[0] != '=') {
if (f == NULL)
f = "stdin";
if (l == NULL)
l = "<none>";
if (v == NULL)
v = "no value at all";
fprintf(stderr, "%s:%s:error in assert format of id=%s expecting value to be prefixed with an `=' got %s\n",
f, l, i, v);
}
t->id = i;
t->val = v;
a_delete (char *)c;
a_delete (char *)f;
a_delete (char *)l;
}
}
void assert_state::addx (const char *c, const char *i, const char *v,
const char *f, const char *l)
{
add(&xhead, c, i, v, f, l);
}
void assert_state::addy (const char *c, const char *i, const char *v,
const char *f, const char *l)
{
add(&yhead, c, i, v, f, l);
}
void assert_state::compare(assert_pos *t,
const char *v, const char *f, const char *l)
{
const char *s=t->val;
while ((*v) == '=')
v++;
while ((*s) == '=')
s++;
if (strcmp(v, s) != 0) {
if (f == NULL)
f = "stdin";
if (l == NULL)
l = "<none>";
fprintf(stderr, "%s:%s: grohtml assertion failed at id%s expecting %s and was given %s\n",
f, l, t->id, s, v);
}
}
void assert_state::close (const char *c)
{
if (strcmp(c, "sp") == 0)
check_sp_flag = 0;
else if (strcmp(c, "br") == 0)
check_br_flag = 0;
else if (strcmp(c, "fi") == 0)
check_fi_flag = 0;
else if (strcmp(c, "nf") == 0)
check_fi_flag = 0;
else if (strcmp(c, "ce") == 0)
check_ce_flag = 0;
else
fprintf(stderr, "internal error: unrecognised tag in grohtml (%s)\n", c);
}
const char *replace_negate_str (const char *before, char *after)
{
if (before != NULL)
a_delete (char *)before;
if (strlen(after) > 0) {
int d = atoi(after);
if (d < 0 || d > 1) {
fprintf(stderr, "expecting nf/fi value to be 0 or 1 not %d\n", d);
d = 0;
}
if (d == 0)
after[0] = '1';
else
after[0] = '0';
after[1] = (char)0;
}
return after;
}
const char *replace_str (const char *before, const char *after)
{
if (before != NULL)
a_delete (char *)before;
return after;
}
void assert_state::set (const char *c, const char *v,
const char *f, const char *l)
{
if (l == NULL)
l = "<none>";
if (f == NULL)
f = "stdin";
// fprintf(stderr, "%s:%s:setting %s to %s\n", f, l, c, v);
if (strcmp(c, "sp") == 0) {
check_sp_flag = 1;
val_sp = replace_str(val_sp, strsave(v));
file_sp = replace_str(file_sp, strsave(f));
line_sp = replace_str(line_sp, strsave(l));
} else if (strcmp(c, "br") == 0) {
check_br_flag = 1;
val_br = replace_str(val_br, strsave(v));
file_br = replace_str(file_br, strsave(f));
line_br = replace_str(line_br, strsave(l));
} else if (strcmp(c, "fi") == 0) {
check_fi_flag = 1;
val_fi = replace_str(val_fi, strsave(v));
file_fi = replace_str(file_fi, strsave(f));
line_fi = replace_str(line_fi, strsave(l));
} else if (strcmp(c, "nf") == 0) {
check_fi_flag = 1;
val_fi = replace_negate_str(val_fi, strsave(v));
file_fi = replace_str(file_fi, strsave(f));
line_fi = replace_str(line_fi, strsave(l));
} else if (strcmp(c, "ce") == 0) {
check_ce_flag = 1;
val_ce = replace_str(val_ce, strsave(v));
file_ce = replace_str(file_ce, strsave(f));
line_ce = replace_str(line_ce, strsave(l));
}
}
/*
* build - builds the troff state assertion.
* see tmac/www.tmac for cmd examples.
*/
void assert_state::build (const char *c, const char *v,
const char *f, const char *l)
{
if (c[0] == '{')
set(&c[1], v, f, l);
if (c[0] == '}')
close(&c[1]);
}
int assert_state::check_value_error (int c, int v, const char *s,
const char *name,
const char *f, const char *l, int flag)
{
if (! c) {
if (f == NULL)
f = "stdin";
if (l == NULL)
l = "<none>";
fprintf(stderr, "%s:%s:grohtml (troff state) assertion failed, expected %s to be %s but found it to contain %d\n",
f, l, name, s, v);
return 0;
}
return flag;
}
void assert_state::check_value (const char *s, int v, const char *name,
const char *f, const char *l, int *flag)
{
if (strncmp(s, "<=", 2) == 0)
*flag = check_value_error(v <= atoi(&s[2]), v, s, name, f, l, *flag);
else if (strncmp(s, ">=", 2) == 0)
*flag = check_value_error(v >= atoi(&s[2]), v, s, name, f, l, *flag);
else if (strncmp(s, "==", 2) == 0)
*flag = check_value_error(v == atoi(&s[2]), v, s, name, f, l, *flag);
else if (strncmp(s, "!=", 2) == 0)
*flag = check_value_error(v != atoi(&s[2]), v, s, name, f, l, *flag);
else if (strncmp(s, "<", 1) == 0)
*flag = check_value_error(v < atoi(&s[2]), v, s, name, f, l, *flag);
else if (strncmp(s, ">", 1) == 0)
*flag = check_value_error(v > atoi(&s[2]), v, s, name, f, l, *flag);
else if (strncmp(s, "=", 1) == 0)
*flag = check_value_error(v == atoi(&s[1]), v, s, name, f, l, *flag);
else
*flag = check_value_error(v == atoi(s), v, s, name, f, l, *flag);
}
void assert_state::check_sp (int sp)
{
if (check_sp_flag)
check_value(val_sp, sp, "sp", file_sp, line_sp, &check_sp_flag);
}
void assert_state::check_fi (int fi)
{
if (check_fi_flag)
check_value(val_fi, fi, "fi", file_fi, line_fi, &check_fi_flag);
}
void assert_state::check_br (int br)
{
if (check_br_flag)
check_value(val_br, br, "br", file_br, line_br, &check_br_flag);
}
void assert_state::check_ce (int ce)
{
if (check_ce_flag)
check_value(val_ce, ce, "ce", file_ce, line_ce, &check_ce_flag);
}
class html_printer : public printer {
files file_list;
simple_output html;
int res;
int space_char_index;
int space_width;
int no_of_printed_pages;
int paper_length;
string sbuf;
int sbuf_start_hpos;
int sbuf_vpos;
int sbuf_end_hpos;
int sbuf_prev_hpos;
int sbuf_kern;
style sbuf_style;
int last_sbuf_length;
int overstrike_detected;
style output_style;
int output_hpos;
int output_vpos;
int output_vpos_max;
int output_draw_point_size;
int line_thickness;
int output_line_thickness;
unsigned char output_space_code;
char *inside_font_style;
int page_number;
title_desc title;
header_desc header;
int header_indent;
int supress_sub_sup;
int cutoff_heading;
page *page_contents;
html_text *current_paragraph;
html_indent *indent;
html_table *table;
int end_center;
int end_tempindent;
TAG_ALIGNMENT next_tag;
int fill_on;
int max_linelength;
int linelength;
int pageoffset;
int troff_indent;
int device_indent;
int temp_indent;
int pointsize;
int vertical_spacing;
int line_number;
color *background;
int seen_indent;
int next_indent;
int seen_pageoffset;
int next_pageoffset;
int seen_linelength;
int next_linelength;
int seen_center;
int next_center;
int seen_space;
int seen_break;
int current_column;
int row_space;
assert_state as;
void flush_sbuf ();
void set_style (const style &);
void set_space_code (unsigned char c);
void do_exec (char *, const environment *);
void do_import (char *, const environment *);
void do_def (char *, const environment *);
void do_mdef (char *, const environment *);
void do_file (char *, const environment *);
void set_line_thickness (const environment *);
void terminate_current_font (void);
void flush_font (void);
void add_to_sbuf (int index, const string &s);
void write_title (int in_head);
int sbuf_continuation (int index, const char *name, const environment *env, int w);
void flush_page (void);
void troff_tag (text_glob *g);
void flush_globs (void);
void emit_line (text_glob *g);
void emit_raw (text_glob *g);
void emit_html (text_glob *g);
void determine_space (text_glob *g);
void start_font (const char *name);
void end_font (const char *name);
int is_font_courier (font *f);
int is_line_start (int nf);
int is_courier_until_eol (void);
void start_size (int from, int to);
void do_font (text_glob *g);
void do_center (char *arg);
void do_check_center (void);
void do_break (void);
void do_space (char *arg);
void do_eol (void);
void do_eol_ce (void);
void do_title (void);
void do_fill (char *arg);
void do_heading (char *arg);
void write_header (void);
void determine_header_level (int level);
void do_linelength (char *arg);
void do_pageoffset (char *arg);
void do_indentation (char *arg);
void do_tempindent (char *arg);
void do_indentedparagraph (void);
void do_verticalspacing (char *arg);
void do_pointsize (char *arg);
void do_centered_image (void);
void do_left_image (void);
void do_right_image (void);
void do_auto_image (text_glob *g, const char *filename);
void do_links (void);
void do_flush (void);
void do_job_name (char *name);
void do_head (char *name);
void insert_split_file (void);
int is_in_middle (int left, int right);
void do_sup_or_sub (text_glob *g);
int start_subscript (text_glob *g);
int end_subscript (text_glob *g);
int start_superscript (text_glob *g);
int end_superscript (text_glob *g);
void outstanding_eol (int n);
int is_bold (font *f);
font *make_bold (font *f);
int overstrike (int index, const char *name, const environment *env, int w);
void do_body (void);
int next_horiz_pos (text_glob *g, int nf);
void lookahead_for_tables (void);
void insert_tab_te (void);
text_glob *insert_tab_ts (text_glob *where);
void insert_tab0_foreach_tab (void);
void insert_tab_0 (text_glob *where);
void do_indent (int in, int pageoff, int linelen);
void shutdown_table (void);
void do_tab_ts (text_glob *g);
void do_tab_te (void);
void do_col (char *s);
void do_tab (char *s);
void do_tab0 (void);
int calc_nf (text_glob *g, int nf);
void calc_po_in (text_glob *g, int nf);
void remove_tabs (void);
void remove_courier_tabs (void);
void update_min_max (colType type_of_col, int *minimum, int *maximum, text_glob *g);
void add_table_end (const char *);
void do_file_components (void);
void write_navigation (const string &top, const string &prev,
const string &next, const string ¤t);
void emit_link (const string &to, const char *name);
int get_troff_indent (void);
void restore_troff_indent (void);
void handle_assertion (int minv, int minh, int maxv, int maxh, const char *s);
void handle_state_assertion (text_glob *g);
void do_end_para (text_glob *g);
int round_width (int x);
void handle_tag_within_title (text_glob *g);
void writeHeadMetaStyle (void);
// ADD HERE
public:
html_printer ();
~html_printer ();
void set_char (int i, font *f, const environment *env, int w, const char *name);
void set_numbered_char(int num, const environment *env, int *widthp);
int set_char_and_width(const char *nm, const environment *env,
int *widthp, font **f);
void draw (int code, int *p, int np, const environment *env);
void begin_page (int);
void end_page (int);
void special (char *arg, const environment *env, char type);
void devtag (char *arg, const environment *env, char type);
font *make_font (const char *);
void end_of_line ();
};
printer *make_printer()
{
return new html_printer;
}
static void usage(FILE *stream);
void html_printer::set_style(const style &sty)
{
const char *fontname = sty.f->get_name();
if (fontname == NULL)
fatal("no internalname specified for font");
#if 0
change_font(fontname, (font::res/(72*font::sizescale))*sty.point_size);
#endif
}
/*
* is_bold - returns TRUE if font, f, is bold.
*/
int html_printer::is_bold (font *f)
{
const char *fontname = f->get_name();
return (strcmp(fontname, "B") == 0) || (strcmp(fontname, "BI") == 0);
}
/*
* make_bold - if a bold font of, f, exists then return it.
*/
font *html_printer::make_bold (font *f)
{
const char *fontname = f->get_name();
if (strcmp(fontname, "B") == 0)
return f;
if (strcmp(fontname, "I") == 0)
return font::load_font("BI");
if (strcmp(fontname, "BI") == 0)
return f;
return NULL;
}
void html_printer::end_of_line()
{
flush_sbuf();
line_number++;
}
/*
* emit_line - writes out a horizontal rule.
*/
void html_printer::emit_line (text_glob *)
{
// --fixme-- needs to know the length in percentage
html.put_string("<hr>");
}
/*
* restore_troff_indent - is called when we have temporarily shutdown
* indentation (typically done when we have
* centered an image).
*/
void html_printer::restore_troff_indent (void)
{
troff_indent = next_indent;
if (troff_indent > 0) {
/*
* force device indentation
*/
device_indent = 0;
do_indent(get_troff_indent(), pageoffset, linelength);
}
}
/*
* emit_raw - writes the raw html information directly to the device.
*/
void html_printer::emit_raw (text_glob *g)
{
do_font(g);
if (next_tag == INLINE) {
determine_space(g);
current_paragraph->do_emittext(g->text_string, g->text_length);
} else {
int space = current_paragraph->retrieve_para_space() || seen_space;
current_paragraph->done_para();
shutdown_table();
switch (next_tag) {
case CENTERED:
current_paragraph->do_para("align=center", space);
break;
case LEFT:
current_paragraph->do_para(&html, "align=left", get_troff_indent(), pageoffset, linelength, space);
break;
case RIGHT:
current_paragraph->do_para(&html, "align=right", get_troff_indent(), pageoffset, linelength, space);
break;
default:
fatal("unknown enumeration");
}
current_paragraph->do_emittext(g->text_string, g->text_length);
current_paragraph->done_para();
next_tag = INLINE;
supress_sub_sup = TRUE;
seen_space = FALSE;
restore_troff_indent();
}
}
/*
* handle_tag_within_title - handle a limited number of tags within
* the context of a table. Those tags which
* set values rather than generate spaces
* and paragraphs.
*/
void html_printer::handle_tag_within_title (text_glob *g)
{
if (g->is_in() || g->is_ti() || g->is_po() || g->is_ce() || g->is_ll()
|| g->is_fi() || g->is_nf())
troff_tag(g);
}
/*
* do_center - handle the .ce commands from troff.
*/
void html_printer::do_center (char *arg)
{
next_center = atoi(arg);
seen_center = TRUE;
}
/*
* do_centered_image - set a flag such that the next devtag is
* placed inside a centered paragraph.
*/
void html_printer::do_centered_image (void)
{
next_tag = CENTERED;
}
/*
* do_right_image - set a flag such that the next devtag is
* placed inside a right aligned paragraph.
*/
void html_printer::do_right_image (void)
{
next_tag = RIGHT;
}
/*
* do_left_image - set a flag such that the next devtag is
* placed inside a left aligned paragraph.
*/
void html_printer::do_left_image (void)
{
next_tag = LEFT;
}
/*
* exists - returns TRUE if filename exists.
*/
static int exists (const char *filename)
{
FILE *fp = fopen(filename, "r");
if (fp == 0) {
return( FALSE );
} else {
fclose(fp);
return( TRUE );
}
}
/*
* generate_img_src - returns a html image tag for the filename
* providing that the image exists.
*/
static string &generate_img_src (const char *filename)
{
string *s = new string("");
while (filename && (filename[0] == ' ')) {
filename++;
}
if (exists(filename))
*s += string("<img src=\"") + filename + "\" "
+ "alt=\"Image " + filename + "\">";
return *s;
}
/*
* do_auto_image - tests whether the image, indicated by filename,
* is present, if so then it emits an html image tag.
* An image tag may be passed through from pic, eqn
* but the corresponding image might not be created.
* Consider .EQ delim $$ .EN or an empty .PS .PE.
*/
void html_printer::do_auto_image (text_glob *g, const char *filename)
{
string buffer = generate_img_src(filename);
if (! buffer.empty()) {
/*
* utilize emit_raw by creating a new text_glob.
*/
text_glob h = *g;
h.text_string = buffer.contents();
h.text_length = buffer.length();
emit_raw(&h);
} else
next_tag = INLINE;
}
/*
* outstanding_eol - call do_eol, n, times.
*/
void html_printer::outstanding_eol (int n)
{
while (n > 0) {
do_eol();
n--;
}
}
/*
* do_title - handle the .tl commands from troff.
*/
void html_printer::do_title (void)
{
text_glob *t;
int removed_from_head;
if (page_number == 1) {
int found_title_start = FALSE;
if (! page_contents->glyphs.is_empty()) {
page_contents->glyphs.sub_move_right(); /* move onto next word */
do {
t = page_contents->glyphs.get_data();
removed_from_head = FALSE;
if (t->is_auto_img()) {
string img = generate_img_src((char *)(t->text_string + 20));
if (! img.empty()) {
if (found_title_start)
title.text += " ";
found_title_start = TRUE;
title.has_been_found = TRUE;
title.text += img;
}
page_contents->glyphs.sub_move_right(); /* move onto next word */
removed_from_head = ((!page_contents->glyphs.is_empty()) &&
(page_contents->glyphs.is_equal_to_head()));
} else if (t->is_eo_tl()) {
/* end of title found
*/
title.has_been_found = TRUE;
return;
} else if (t->is_a_tag()) {
handle_tag_within_title(t);
page_contents->glyphs.sub_move_right(); /* move onto next word */
removed_from_head = ((!page_contents->glyphs.is_empty()) &&
(page_contents->glyphs.is_equal_to_head()));
} else if (found_title_start) {
title.text += " " + string(t->text_string, t->text_length);
page_contents->glyphs.sub_move_right(); /* move onto next word */
removed_from_head = ((!page_contents->glyphs.is_empty()) &&
(page_contents->glyphs.is_equal_to_head()));
} else {
title.text += string(t->text_string, t->text_length);
found_title_start = TRUE;
title.has_been_found = TRUE;
page_contents->glyphs.sub_move_right(); /* move onto next word */
removed_from_head = ((!page_contents->glyphs.is_empty()) &&
(page_contents->glyphs.is_equal_to_head()));
}
} while ((! page_contents->glyphs.is_equal_to_head()) ||
(removed_from_head));
}
}
}
void html_printer::write_header (void)
{
if (! header.header_buffer.empty()) {
int space = current_paragraph->retrieve_para_space() || seen_space;
if (header.header_level > 7) {
header.header_level = 7;
}
// firstly we must terminate any font and type faces
current_paragraph->done_para();
supress_sub_sup = TRUE;
if (cutoff_heading+2 > header.header_level) {
// now we save the header so we can issue a list of links
header.no_of_headings++;
style st;
text_glob *h=new text_glob();
h->text_glob_html(&st,
header.headings.add_string(header.header_buffer),
header.header_buffer.length(),
header.no_of_headings, header.header_level,
header.no_of_headings, header.header_level);
header.headers.add(h,
header.no_of_headings,
header.no_of_headings, header.no_of_headings,
header.no_of_headings, header.no_of_headings); // and add this header to the header list
// lastly we generate a tag
html.nl().nl().put_string("<a name=\"");
if (simple_anchors) {
string buffer(ANCHOR_TEMPLATE);
buffer += as_string(header.no_of_headings);
buffer += '\0';
html.put_string(buffer.contents());
} else {
html.put_string(header.header_buffer);
}
html.put_string("\"></a>").nl();
}
if (manufacture_headings) {
// line break before a header
if (!current_paragraph->emitted_text())
current_paragraph->do_space();
// user wants manufactured headings which look better than <Hn></Hn>
if (header.header_level<4) {
html.put_string("<b><font size=\"+1\">");
html.put_string(header.header_buffer);
html.put_string("</font></b>").nl();
}
else {
html.put_string("<b>");
html.put_string(header.header_buffer);
html.put_string("</b>").nl();
}
}
else {
// and now we issue the real header
html.put_string("<h");
html.put_number(header.header_level);
html.put_string(">");
html.put_string(header.header_buffer);
html.put_string("</h");
html.put_number(header.header_level);
html.put_string(">").nl();
}
/* and now we save the file name in which this header will occur */
style st; // fake style to enable us to use the list data structure
text_glob *h=new text_glob();
h->text_glob_html(&st,
header.headings.add_string(file_list.file_name()),
file_list.file_name().length(),
header.no_of_headings, header.header_level,
header.no_of_headings, header.header_level);
header.header_filename.add(h,
header.no_of_headings,
header.no_of_headings, header.no_of_headings,
header.no_of_headings, header.no_of_headings);
current_paragraph->do_para(&html, "", get_troff_indent(), pageoffset, linelength, space);
}
}
void html_printer::determine_header_level (int level)
{
if (level == 0) {
int i;
for (i=0; ((i<header.header_buffer.length())
&& ((header.header_buffer[i] == '.')
|| is_digit(header.header_buffer[i]))) ; i++) {
if (header.header_buffer[i] == '.') {
level++;
}
}
}
header.header_level = level+1;
if (header.header_level >= 2 && header.header_level <= split_level) {
header.no_of_level_one_headings++;
insert_split_file();
}
}
/*
* do_heading - handle the .SH and .NH and equivalent commands from troff.
*/
void html_printer::do_heading (char *arg)
{
text_glob *g;
int level=atoi(arg);
int horiz;
header.header_buffer.clear();
page_contents->glyphs.move_right();
if (! page_contents->glyphs.is_equal_to_head()) {
g = page_contents->glyphs.get_data();
horiz = g->minh;
do {
if (g->is_auto_img()) {
string img=generate_img_src((char *)(g->text_string + 20));
if (! img.empty()) {
simple_anchors = TRUE; // we cannot use full heading anchors with images
if (horiz < g->minh)
header.header_buffer += " ";
header.header_buffer += img;
}
}
else if (g->is_in() || g->is_ti() || g->is_po() || g->is_ce() || g->is_ll())
troff_tag(g);
else if (g->is_fi())
fill_on = 1;
else if (g->is_nf())
fill_on = 0;
else if (! (g->is_a_line() || g->is_a_tag())) {
/*
* we ignore the other tag commands when constructing a heading
*/
if (horiz < g->minh)
header.header_buffer += " ";
horiz = g->maxh;
header.header_buffer += string(g->text_string, g->text_length);
}
page_contents->glyphs.move_right();
g = page_contents->glyphs.get_data();
} while ((! page_contents->glyphs.is_equal_to_head()) &&
(! g->is_eo_h()));
}
determine_header_level(level);
write_header();
// finally set the output to neutral for after the header
g = page_contents->glyphs.get_data();
page_contents->glyphs.move_left(); // so that next time we use old g
}
/*
* is_courier_until_eol - returns TRUE if we can see a whole line which is courier
*/
int html_printer::is_courier_until_eol (void)
{
text_glob *orig = page_contents->glyphs.get_data();
int result = TRUE;
text_glob *g;
if (! page_contents->glyphs.is_equal_to_tail()) {
page_contents->glyphs.move_right();
do {
g = page_contents->glyphs.get_data();
if (! g->is_a_tag() && (! is_font_courier(g->text_style.f)))
result = FALSE;
page_contents->glyphs.move_right();
} while (result &&
(! page_contents->glyphs.is_equal_to_head()) &&
(! g->is_fi()) && (! g->is_eol()));
/*
* now restore our previous position.
*/
while (page_contents->glyphs.get_data() != orig)
page_contents->glyphs.move_left();
}
return result;
}
/*
* do_linelength - handle the .ll command from troff.
*/
void html_printer::do_linelength (char *arg)
{
if (max_linelength == -1)
max_linelength = atoi(arg);
next_linelength = atoi(arg);
seen_linelength = TRUE;
}
/*
* do_pageoffset - handle the .po command from troff.
*/
void html_printer::do_pageoffset (char *arg)
{
next_pageoffset = atoi(arg);
seen_pageoffset = TRUE;
}
/*
* get_troff_indent - returns the indent value.
*/
int html_printer::get_troff_indent (void)
{
if (end_tempindent > 0)
return temp_indent;
else
return troff_indent;
}
/*
* do_indentation - handle the .in command from troff.
*/
void html_printer::do_indentation (char *arg)
{
next_indent = atoi(arg);
seen_indent = TRUE;
}
/*
* do_tempindent - handle the .ti command from troff.
*/
void html_printer::do_tempindent (char *arg)
{
if (fill_on) {
/*
* we set the end_tempindent to 2 as the first .br
* activates the .ti and the second terminates it.
*/
end_tempindent = 2;
temp_indent = atoi(arg);
}
}
/*
* shutdown_table - shuts down the current table.
*/
void html_printer::shutdown_table (void)
{
if (table != NULL) {
current_paragraph->done_para();
table->emit_finish_table();
// dont delete this table as it will be deleted when we destroy the text_glob
table = NULL;
}
}
/*
* do_indent - remember the indent parameters and if
* indent is > pageoff and indent has changed
* then we start a html table to implement the indentation.
*/
void html_printer::do_indent (int in, int pageoff, int linelen)
{
if ((device_indent != -1) &&
(pageoffset+device_indent != in+pageoff)) {
int space = current_paragraph->retrieve_para_space() || seen_space;
current_paragraph->done_para();
device_indent = in;
pageoffset = pageoff;
if (linelen <= max_linelength)
linelength = linelen;
current_paragraph->do_para(&html, "", device_indent,
pageoffset, max_linelength, space);
}
}
/*
* do_verticalspacing - handle the .vs command from troff.
*/
void html_printer::do_verticalspacing (char *arg)
{
vertical_spacing = atoi(arg);
}
/*
* do_pointsize - handle the .ps command from troff.
*/
void html_printer::do_pointsize (char *arg)
{
/*
* firstly check to see whether this point size is really associated with a .tl tag
*/
if (! page_contents->glyphs.is_empty()) {
text_glob *g = page_contents->glyphs.get_data();
text_glob *t = page_contents->glyphs.get_data();
while (t->is_a_tag() && (! page_contents->glyphs.is_equal_to_head())) {
if (t->is_tl()) {
/*
* found title therefore ignore this .ps tag
*/
while (t != g) {
page_contents->glyphs.move_left();
t = page_contents->glyphs.get_data();
}
return;
}
page_contents->glyphs.move_right();
t = page_contents->glyphs.get_data();
}
/*
* move back to original position
*/
while (t != g) {
page_contents->glyphs.move_left();
t = page_contents->glyphs.get_data();
}
/*
* collect legal pointsize
*/
pointsize = atoi(arg);
}
}
/*
* do_fill - records whether troff has requested that text be filled.
*/
void html_printer::do_fill (char *arg)
{
int on = atoi(arg);
output_hpos = get_troff_indent()+pageoffset;
supress_sub_sup = TRUE;
if (fill_on != on) {
if (on)
current_paragraph->do_para("", seen_space);
fill_on = on;
}
}
/*
* do_eol - handle the end of line
*/
void html_printer::do_eol (void)
{
if (! fill_on) {
if (current_paragraph->ever_emitted_text()) {
current_paragraph->do_newline();
current_paragraph->do_break();
}
}
output_hpos = get_troff_indent()+pageoffset;
}
/*
* do_check_center - checks to see whether we have seen a `.ce' tag
* during the previous line.
*/
void html_printer::do_check_center(void)
{
if (seen_center) {
seen_center = FALSE;
if (next_center > 0) {
if (end_center == 0) {
int space = current_paragraph->retrieve_para_space() || seen_space;
current_paragraph->done_para();
supress_sub_sup = TRUE;
current_paragraph->do_para("align=center", space);
} else
if (strcmp("align=center",
current_paragraph->get_alignment()) != 0) {
/*
* different alignment, so shutdown paragraph and open
* a new one.
*/
int space = current_paragraph->retrieve_para_space() || seen_space;
current_paragraph->done_para();
supress_sub_sup = TRUE;
current_paragraph->do_para("align=center", space);
} else
/*
* same alignment, if we have emitted text then issue a break.
*/
if (current_paragraph->emitted_text())
current_paragraph->do_break();
} else
/*
* next_center == 0
*/
if (end_center > 0) {
seen_space = seen_space || current_paragraph->retrieve_para_space();
current_paragraph->done_para();
supress_sub_sup = TRUE;
current_paragraph->do_para("", seen_space);
}
end_center = next_center;
}
}
/*
* do_eol_ce - handle end of line specifically for a .ce
*/
void html_printer::do_eol_ce (void)
{
if (end_center > 0) {
if (end_center > 1)
if (current_paragraph->emitted_text())
current_paragraph->do_break();
end_center--;
if (end_center == 0) {
current_paragraph->done_para();
supress_sub_sup = TRUE;
}
}
}
/*
* do_flush - flushes all output and tags.
*/
void html_printer::do_flush (void)
{
current_paragraph->done_para();
}
/*
* do_links - moves onto a new temporary file and sets auto_links to FALSE.
*/
void html_printer::do_links (void)
{
html.end_line(); // flush line
auto_links = FALSE; /* from now on only emit under user request */
file_list.add_new_file(xtmpfile());
file_list.set_links_required();
html.set_file(file_list.get_file());
}
/*
* insert_split_file -
*/
void html_printer::insert_split_file (void)
{
if (multiple_files) {
current_paragraph->done_para(); // flush paragraph
html.end_line(); // flush line
html.set_file(file_list.get_file()); // flush current file
file_list.add_new_file(xtmpfile());
string split_file = job_name;
split_file += string("-");
split_file += as_string(header.no_of_level_one_headings);
split_file += string(".html");
split_file += '\0';
file_list.set_file_name(split_file);
html.set_file(file_list.get_file());
}
}
/*
* do_job_name - assigns the job_name to name.
*/
void html_printer::do_job_name (char *name)
{
if (! multiple_files) {
multiple_files = TRUE;
while (name != NULL && (*name != (char)0) && (*name == ' '))
name++;
job_name = name;
}
}
/*
* do_head - adds a string to head_info which is to be included into
* the <head> </head> section of the html document.
*/
void html_printer::do_head (char *name)
{
head_info += string(name);
head_info += '\n';
}
/*
* do_break - handles the ".br" request and also
* undoes an outstanding ".ti" command
* and calls indent if the indentation
* related registers have changed.
*/
void html_printer::do_break (void)
{
int seen_temp_indent = FALSE;
current_paragraph->do_break();
if (end_tempindent > 0) {
end_tempindent--;
if (end_tempindent > 0)
seen_temp_indent = TRUE;
}
if (seen_indent || seen_pageoffset || seen_linelength || seen_temp_indent) {
if (seen_indent && (! seen_temp_indent))
troff_indent = next_indent;
if (! seen_pageoffset)
next_pageoffset = pageoffset;
if (! seen_linelength)
next_linelength = linelength;
do_indent(get_troff_indent(), next_pageoffset, next_linelength);
}
seen_indent = seen_temp_indent;
seen_linelength = FALSE;
seen_pageoffset = FALSE;
do_check_center();
output_hpos = get_troff_indent()+pageoffset;
supress_sub_sup = TRUE;
}
void html_printer::do_space (char *arg)
{
int n = atoi(arg);
seen_space = atoi(arg);
as.check_sp(seen_space);
#if 0
if (n>0 && table)
table->set_space(TRUE);
#endif
while (n>0) {
current_paragraph->do_space();
n--;
}
supress_sub_sup = TRUE;
}
/*
* do_tab_ts - start a table, which will have already been defined.
*/
void html_printer::do_tab_ts (text_glob *g)
{
html_table *t = g->get_table();
if (t != NULL) {
current_column = 0;
current_paragraph->done_pre();
current_paragraph->done_para();
current_paragraph->remove_para_space();
#if defined(DEBUG_TABLES)
html.simple_comment("TABS");
#endif
t->set_linelength(max_linelength);
t->add_indent(pageoffset);
#if 0
t->emit_table_header(seen_space);
#else
t->emit_table_header(FALSE);
row_space = current_paragraph->retrieve_para_space() || seen_space;
seen_space = FALSE;
#endif
}
table = t;
}
/*
* do_tab_te - finish a table.
*/
void html_printer::do_tab_te (void)
{
if (table) {
current_paragraph->done_para();
current_paragraph->remove_para_space();
table->emit_finish_table();
}
table = NULL;
restore_troff_indent();
}
/*
* do_tab - handle the "devtag:tab" tag
*/
void html_printer::do_tab (char *s)
{
if (table) {
while (isspace(*s))
s++;
s++;
int col = table->find_column(atoi(s) + pageoffset + get_troff_indent());
if (col > 0) {
current_paragraph->done_para();
table->emit_col(col);
}
}
}
/*
* do_tab0 - handle the "devtag:tab0" tag
*/
void html_printer::do_tab0 (void)
{
if (table) {
int col = table->find_column(pageoffset+get_troff_indent());
if (col > 0) {
current_paragraph->done_para();
table->emit_col(col);
}
}
}
/*
* do_col - start column, s.
*/
void html_printer::do_col (char *s)
{
if (table) {
if (atoi(s) < current_column)
row_space = seen_space;
current_column = atoi(s);
current_paragraph->done_para();
table->emit_col(current_column);
current_paragraph->do_para("", row_space);
}
}
/*
* troff_tag - processes the troff tag and manipulates the troff
* state machine.
*/
void html_printer::troff_tag (text_glob *g)
{
/*
* firstly skip over devtag:
*/
char *t=(char *)g->text_string+strlen("devtag:");
if (strncmp(g->text_string, "html</p>:", strlen("html</p>:")) == 0) {
do_end_para(g);
} else if (g->is_eol()) {
do_eol();
} else if (g->is_eol_ce()) {
do_eol_ce();
} else if (strncmp(t, ".sp", 3) == 0) {
char *a = (char *)t+3;
do_space(a);
} else if (strncmp(t, ".br", 3) == 0) {
seen_break = 1;
as.check_br(1);
do_break();
} else if (strcmp(t, ".centered-image") == 0) {
do_centered_image();
} else if (strcmp(t, ".right-image") == 0) {
do_right_image();
} else if (strcmp(t, ".left-image") == 0) {
do_left_image();
} else if (strncmp(t, ".auto-image", 11) == 0) {
char *a = (char *)t+11;
do_auto_image(g, a);
} else if (strncmp(t, ".ce", 3) == 0) {
char *a = (char *)t+3;
supress_sub_sup = TRUE;
do_center(a);
} else if (g->is_tl()) {
supress_sub_sup = TRUE;
title.with_h1 = TRUE;
do_title();
} else if (strncmp(t, ".html-tl", 8) == 0) {
supress_sub_sup = TRUE;
title.with_h1 = FALSE;
do_title();
} else if (strncmp(t, ".fi", 3) == 0) {
char *a = (char *)t+3;
do_fill(a);
} else if ((strncmp(t, ".SH", 3) == 0) || (strncmp(t, ".NH", 3) == 0)) {
char *a = (char *)t+3;
do_heading(a);
} else if (strncmp(t, ".ll", 3) == 0) {
char *a = (char *)t+3;
do_linelength(a);
} else if (strncmp(t, ".po", 3) == 0) {
char *a = (char *)t+3;
do_pageoffset(a);
} else if (strncmp(t, ".in", 3) == 0) {
char *a = (char *)t+3;
do_indentation(a);
} else if (strncmp(t, ".ti", 3) == 0) {
char *a = (char *)t+3;
do_tempindent(a);
} else if (strncmp(t, ".vs", 3) == 0) {
char *a = (char *)t+3;
do_verticalspacing(a);
} else if (strncmp(t, ".ps", 3) == 0) {
char *a = (char *)t+3;
do_pointsize(a);
} else if (strcmp(t, ".links") == 0) {
do_links();
} else if (strncmp(t, ".job-name", 9) == 0) {
char *a = (char *)t+9;
do_job_name(a);
} else if (strncmp(t, ".head", 5) == 0) {
char *a = (char *)t+5;
do_head(a);
} else if (strcmp(t, ".no-auto-rule") == 0) {
auto_rule = FALSE;
} else if (strcmp(t, ".tab-ts") == 0) {
do_tab_ts(g);
} else if (strcmp(t, ".tab-te") == 0) {
do_tab_te();
} else if (strncmp(t, ".col ", 5) == 0) {
char *a = (char *)t+4;
do_col(a);
} else if (strncmp(t, "tab ", 4) == 0) {
char *a = (char *)t+3;
do_tab(a);
} else if (strncmp(t, "tab0", 4) == 0) {
do_tab0();
}
}
/*
* is_in_middle - returns TRUE if the positions left..right are in the center of the page.
*/
int html_printer::is_in_middle (int left, int right)
{
return( abs(abs(left-pageoffset) - abs(pageoffset+linelength-right))
<= CENTER_TOLERANCE );
}
/*
* flush_globs - runs through the text glob list and emits html.
*/
void html_printer::flush_globs (void)
{
text_glob *g;
if (! page_contents->glyphs.is_empty()) {
page_contents->glyphs.start_from_head();
do {
g = page_contents->glyphs.get_data();
#if 0
fprintf(stderr, "[%s:%d:%d:%d:%d]",
g->text_string, g->minv, g->minh, g->maxv, g->maxh) ;
fflush(stderr);
#endif
handle_state_assertion(g);
if (strcmp(g->text_string, "XXXXXXX") == 0)
stop();
if (g->is_a_tag())
troff_tag(g);
else if (g->is_a_line())
emit_line(g);
else {
as.check_sp(seen_space);
as.check_br(seen_break);
seen_break = 0;
seen_space = 0;
emit_html(g);
}
as.check_fi(fill_on);
as.check_ce(end_center);
/*
* after processing the title (and removing it) the glyph list might be empty
*/
if (! page_contents->glyphs.is_empty()) {
page_contents->glyphs.move_right();
}
} while (! page_contents->glyphs.is_equal_to_head());
}
}
/*
* calc_nf - calculates the _no_ format flag, given the
* text glob, g.
*/
int html_printer::calc_nf (text_glob *g, int nf)
{
if (g != NULL) {
if (g->is_fi()) {
as.check_fi(TRUE);
return FALSE;
}
if (g->is_nf()) {
as.check_fi(FALSE);
return TRUE;
}
}
as.check_fi(! nf);
return nf;
}
/*
* calc_po_in - calculates the, in, po, registers
*/
void html_printer::calc_po_in (text_glob *g, int nf)
{
if (g->is_in())
troff_indent = g->get_arg();
else if (g->is_po())
pageoffset = g->get_arg();
else if (g->is_ti()) {
temp_indent = g->get_arg();
end_tempindent = 2;
} else if (g->is_br() || (nf && g->is_eol())) {
if (end_tempindent > 0)
end_tempindent--;
}
}
/*
* next_horiz_pos - returns the next horiz position.
* -1 is returned if it doesn't exist.
*/
int html_printer::next_horiz_pos (text_glob *g, int nf)
{
int next = -1;
if ((g != NULL) && (g->is_br() || (nf && g->is_eol())))
if (! page_contents->glyphs.is_empty()) {
page_contents->glyphs.move_right_get_data();
if (g == NULL) {
page_contents->glyphs.start_from_head();
as.reset();
}
else {
next = g->minh;
page_contents->glyphs.move_left();
}
}
return next;
}
/*
* insert_tab_ts - inserts a tab-ts before, where.
*/
text_glob *html_printer::insert_tab_ts (text_glob *where)
{
text_glob *start_of_table;
text_glob *old_pos = page_contents->glyphs.get_data();
page_contents->glyphs.move_to(where);
page_contents->glyphs.move_left();
page_contents->insert_tag(string("devtag:.tab-ts")); // tab table start
page_contents->glyphs.move_right();
start_of_table = page_contents->glyphs.get_data();
page_contents->glyphs.move_to(old_pos);
return start_of_table;
}
/*
* insert_tab_te - inserts a tab-te before the current position
* (it skips backwards over .sp/.br)
*/
void html_printer::insert_tab_te (void)
{
text_glob *g = page_contents->glyphs.get_data();
page_contents->dump_page();
while (page_contents->glyphs.get_data()->is_a_tag())
page_contents->glyphs.move_left();
page_contents->insert_tag(string("devtag:.tab-te")); // tab table end
while (g != page_contents->glyphs.get_data())
page_contents->glyphs.move_right();
page_contents->dump_page();
}
/*
* insert_tab_0 - inserts a tab0 before, where.
*/
void html_printer::insert_tab_0 (text_glob *where)
{
text_glob *old_pos = page_contents->glyphs.get_data();
page_contents->glyphs.move_to(where);
page_contents->glyphs.move_left();
page_contents->insert_tag(string("devtag:tab0")); // tab0 start of line
page_contents->glyphs.move_right();
page_contents->glyphs.move_to(old_pos);
}
/*
* remove_tabs - removes the tabs tags on this line.
*/
void html_printer::remove_tabs (void)
{
text_glob *orig = page_contents->glyphs.get_data();
text_glob *g;
if (! page_contents->glyphs.is_equal_to_tail()) {
do {
g = page_contents->glyphs.get_data();
if (g->is_tab()) {
page_contents->glyphs.sub_move_right();
if (g == orig)
orig = page_contents->glyphs.get_data();
} else
page_contents->glyphs.move_right();
} while ((! page_contents->glyphs.is_equal_to_head()) &&
(! g->is_eol()));
/*
* now restore our previous position.
*/
while (page_contents->glyphs.get_data() != orig)
page_contents->glyphs.move_left();
}
}
void html_printer::remove_courier_tabs (void)
{
text_glob *g;
int line_start = TRUE;
int nf = FALSE;
if (! page_contents->glyphs.is_empty()) {
page_contents->glyphs.start_from_head();
as.reset();
line_start = TRUE;
do {
g = page_contents->glyphs.get_data();
handle_state_assertion(g);
nf = calc_nf(g, nf);
if (line_start) {
if (line_start && nf && is_courier_until_eol()) {
remove_tabs();
g = page_contents->glyphs.get_data();
}
}
// line_start = g->is_br() || g->is_nf() || g->is_fi() || (nf && g->is_eol());
line_start = g->is_br() || (nf && g->is_eol());
page_contents->glyphs.move_right();
} while (! page_contents->glyphs.is_equal_to_head());
}
}
void html_printer::insert_tab0_foreach_tab (void)
{
text_glob *start_of_line = NULL;
text_glob *g = NULL;
int seen_tab = FALSE;
int seen_col = FALSE;
int nf = FALSE;
if (! page_contents->glyphs.is_empty()) {
page_contents->glyphs.start_from_head();
as.reset();
start_of_line = page_contents->glyphs.get_data();
do {
g = page_contents->glyphs.get_data();
handle_state_assertion(g);
nf = calc_nf(g, nf);
if (g->is_tab())
seen_tab = TRUE;
if (g->is_col())
seen_col = TRUE;
if (g->is_br() || (nf && g->is_eol())) {
do {
page_contents->glyphs.move_right();
g = page_contents->glyphs.get_data();
handle_state_assertion(g);
nf = calc_nf(g, nf);
if (page_contents->glyphs.is_equal_to_head()) {
if (seen_tab && !seen_col)
insert_tab_0(start_of_line);
return;
}
} while (g->is_br() || (nf && g->is_eol()) || g->is_ta());
// printf("\nstart_of_line is: %s\n", g->text_string);
if (seen_tab && !seen_col) {
insert_tab_0(start_of_line);
page_contents->glyphs.move_to(g);
}
seen_tab = FALSE;
seen_col = FALSE;
start_of_line = g;
}
page_contents->glyphs.move_right();
} while (! page_contents->glyphs.is_equal_to_head());
if (seen_tab && !seen_col)
insert_tab_0(start_of_line);
}
}
/*
* update_min_max - updates the extent of a column, given the left and right
* extents of a glyph, g.
*/
void html_printer::update_min_max (colType type_of_col, int *minimum, int *maximum, text_glob *g)
{
switch (type_of_col) {
case tab_tag:
break;
case tab0_tag:
*minimum = g->minh;
break;
case col_tag:
*minimum = g->minh;
*maximum = g->maxh;
break;
default:
break;
}
}
/*
* add_table_end - moves left one glyph, adds a table end tag and adds a
* debugging string.
*/
void html_printer::add_table_end (const char *
#if defined(DEBUG_TABLES)
debug_string
#endif
)
{
page_contents->glyphs.move_left();
insert_tab_te();
#if defined(DEBUG_TABLES)
page_contents->insert_tag(string(debug_string));
#endif
}
/*
* lookahead_for_tables - checks for .col tags and inserts table
* start/end tags
*/
void html_printer::lookahead_for_tables (void)
{
text_glob *g;
text_glob *start_of_line = NULL;
text_glob *start_of_table = NULL;
text_glob *last = NULL;
colType type_of_col = none;
int left = 0;
int found_col = FALSE;
int seen_text = FALSE;
int ncol = 0;
int colmin = 0; // pacify compiler
int colmax = 0; // pacify compiler
html_table *tbl = new html_table(&html, -1);
const char *tab_defs = NULL;
char align = 'L';
int nf = FALSE;
int old_pageoffset = pageoffset;
remove_courier_tabs();
page_contents->dump_page();
insert_tab0_foreach_tab();
page_contents->dump_page();
if (! page_contents->glyphs.is_empty()) {
page_contents->glyphs.start_from_head();
as.reset();
g = page_contents->glyphs.get_data();
if (g->is_br()) {
g = page_contents->glyphs.move_right_get_data();
handle_state_assertion(g);
if (page_contents->glyphs.is_equal_to_head()) {
if (tbl != NULL) {
delete tbl;
tbl = NULL;
}
return;
}
start_of_line = g;
seen_text = FALSE;
ncol = 0;
left = next_horiz_pos(g, nf);
if (found_col)
last = g;
found_col = FALSE;
}
do {
#if defined(DEBUG_TABLES)
fprintf(stderr, " [") ;
fprintf(stderr, g->text_string) ;
fprintf(stderr, "] ") ;
fflush(stderr);
if (strcmp(g->text_string, "XXXXXXX") == 0)
stop();
#endif
nf = calc_nf(g, nf);
calc_po_in(g, nf);
if (g->is_col()) {
if (type_of_col == tab_tag && start_of_table != NULL) {
page_contents->glyphs.move_left();
insert_tab_te();
start_of_table->remember_table(tbl);
tbl = new html_table(&html, -1);
page_contents->insert_tag(string("*** TAB -> COL ***"));
if (tab_defs != NULL)
tbl->tab_stops->init(tab_defs);
start_of_table = NULL;
last = NULL;
}
type_of_col = col_tag;
found_col = TRUE;
ncol = g->get_arg();
align = 'L';
colmin = 0;
colmax = 0;
} else if (g->is_tab()) {
type_of_col = tab_tag;
colmin = g->get_tab_args(&align);
align = 'L'; // for now as 'C' and 'R' are broken
ncol = tbl->find_tab_column(colmin);
colmin += pageoffset + get_troff_indent();
colmax = tbl->get_tab_pos(ncol+1);
if (colmax > 0)
colmax += pageoffset + get_troff_indent();
} else if (g->is_tab0()) {
if (type_of_col == col_tag && start_of_table != NULL) {
page_contents->glyphs.move_left();
insert_tab_te();
start_of_table->remember_table(tbl);
tbl = new html_table(&html, -1);
page_contents->insert_tag(string("*** COL -> TAB ***"));
start_of_table = NULL;
last = NULL;
}
if (tab_defs != NULL)
tbl->tab_stops->init(tab_defs);
type_of_col = tab0_tag;
ncol = 1;
colmin = 0;
colmax = tbl->get_tab_pos(2) + pageoffset + get_troff_indent();
} else if (! g->is_a_tag())
update_min_max(type_of_col, &colmin, &colmax, g);
if ((! g->is_a_tag()) || g->is_tab())
seen_text = TRUE;
if ((g->is_col() || g->is_tab() || g->is_tab0())
&& (start_of_line != NULL) && (start_of_table == NULL)) {
start_of_table = insert_tab_ts(start_of_line);
start_of_line = NULL;
seen_text = FALSE;
} else if (g->is_ce() && (start_of_table != NULL)) {
add_table_end("*** CE ***");
start_of_table->remember_table(tbl);
tbl = new html_table(&html, -1);
start_of_table = NULL;
last = NULL;
} else if (g->is_ta()) {
tab_defs = g->text_string;
if (type_of_col == col_tag)
tbl->tab_stops->check_init(tab_defs);
if (!tbl->tab_stops->compatible(tab_defs)) {
if (start_of_table != NULL) {
add_table_end("*** TABS ***");
start_of_table->remember_table(tbl);
tbl = new html_table(&html, -1);
start_of_table = NULL;
type_of_col = none;
last = NULL;
}
tbl->tab_stops->init(tab_defs);
}
}
if (((! g->is_a_tag()) || g->is_tab()) && (start_of_table != NULL)) {
// we are in a table and have a glyph
if ((ncol == 0) || (! tbl->add_column(ncol, colmin, colmax, align))) {
if (ncol == 0)
add_table_end("*** NCOL == 0 ***");
else
add_table_end("*** CROSSED COLS ***");
start_of_table->remember_table(tbl);
tbl = new html_table(&html, -1);
start_of_table = NULL;
type_of_col = none;
last = NULL;
}
}
/*
* move onto next glob, check whether we are starting a new line
*/
g = page_contents->glyphs.move_right_get_data();
handle_state_assertion(g);
if (g == NULL) {
if (found_col) {
page_contents->glyphs.start_from_head();
as.reset();
last = g;
found_col = FALSE;
}
} else if (g->is_br() || (nf && g->is_eol())) {
do {
g = page_contents->glyphs.move_right_get_data();
handle_state_assertion(g);
nf = calc_nf(g, nf);
} while ((g != NULL) && (g->is_br() || (nf && g->is_eol())));
start_of_line = g;
seen_text = FALSE;
ncol = 0;
left = next_horiz_pos(g, nf);
if (found_col)
last = g;
found_col = FALSE;
}
} while ((g != NULL) && (! page_contents->glyphs.is_equal_to_head()));
#if defined(DEBUG_TABLES)
fprintf(stderr, "finished scanning for tables\n");
#endif
page_contents->glyphs.start_from_head();
if (start_of_table != NULL) {
if (last != NULL)
while (last != page_contents->glyphs.get_data())
page_contents->glyphs.move_left();
insert_tab_te();
start_of_table->remember_table(tbl);
tbl = NULL;
page_contents->insert_tag(string("*** LAST ***"));
}
}
if (tbl != NULL) {
delete tbl;
tbl = NULL;
}
// and reset the registers
pageoffset = old_pageoffset;
troff_indent = 0;
temp_indent = 0;
end_tempindent = 0;
}
void html_printer::flush_page (void)
{
supress_sub_sup = TRUE;
flush_sbuf();
page_contents->dump_page();
lookahead_for_tables();
page_contents->dump_page();
flush_globs();
current_paragraph->done_para();
// move onto a new page
delete page_contents;
#if defined(DEBUG_TABLES)
fprintf(stderr, "\n\n*** flushed page ***\n\n");
html.simple_comment("new page called");
#endif
page_contents = new page;
}
/*
* determine_space - works out whether we need to write a space.
* If last glyph is ajoining then no space emitted.
*/
void html_printer::determine_space (text_glob *g)
{
if (current_paragraph->is_in_pre()) {
/*
* .nf has been specified
*/
while (output_hpos < g->minh) {
output_hpos += space_width;
current_paragraph->emit_space();
}
} else {
if ((output_vpos != g->minv) || (output_hpos < g->minh)) {
current_paragraph->emit_space();
}
}
}
/*
* is_line_start - returns TRUE if we are at the start of a line.
*/
int html_printer::is_line_start (int nf)
{
int line_start = FALSE;
int result = TRUE;
text_glob *orig = page_contents->glyphs.get_data();
text_glob *g;
if (! page_contents->glyphs.is_equal_to_head()) {
do {
page_contents->glyphs.move_left();
g = page_contents->glyphs.get_data();
result = g->is_a_tag();
if (g->is_fi())
nf = FALSE;
else if (g->is_nf())
nf = TRUE;
line_start = g->is_col() || g->is_br() || (nf && g->is_eol());
} while ((!line_start) && (result));
/*
* now restore our previous position.
*/
while (page_contents->glyphs.get_data() != orig)
page_contents->glyphs.move_right();
}
return result;
}
/*
* is_font_courier - returns TRUE if the font, f, is courier.
*/
int html_printer::is_font_courier (font *f)
{
if (f != 0) {
const char *fontname = f->get_name();
return( (fontname != 0) && (fontname[0] == 'C') );
}
return FALSE;
}
/*
* end_font - shuts down the font corresponding to fontname.
*/
void html_printer::end_font (const char *fontname)
{
if (strcmp(fontname, "B") == 0) {
current_paragraph->done_bold();
} else if (strcmp(fontname, "I") == 0) {
current_paragraph->done_italic();
} else if (strcmp(fontname, "BI") == 0) {
current_paragraph->done_bold();
current_paragraph->done_italic();
} else if (strcmp(fontname, "CR") == 0) {
current_paragraph->done_tt();
} else if (strcmp(fontname, "CI") == 0) {
current_paragraph->done_italic();
current_paragraph->done_tt();
} else if (strcmp(fontname, "CB") == 0) {
current_paragraph->done_bold();
current_paragraph->done_tt();
} else if (strcmp(fontname, "CBI") == 0) {
current_paragraph->done_bold();
current_paragraph->done_italic();
current_paragraph->done_tt();
}
}
/*
* start_font - starts the font corresponding to name.
*/
void html_printer::start_font (const char *fontname)
{
if (strcmp(fontname, "R") == 0) {
current_paragraph->done_bold();
current_paragraph->done_italic();
current_paragraph->done_tt();
} else if (strcmp(fontname, "B") == 0) {
current_paragraph->do_bold();
} else if (strcmp(fontname, "I") == 0) {
current_paragraph->do_italic();
} else if (strcmp(fontname, "BI") == 0) {
current_paragraph->do_bold();
current_paragraph->do_italic();
} else if (strcmp(fontname, "CR") == 0) {
if ((! fill_on) && (is_courier_until_eol()) &&
is_line_start(! fill_on)) {
current_paragraph->do_pre();
}
current_paragraph->do_tt();
} else if (strcmp(fontname, "CI") == 0) {
if ((! fill_on) && (is_courier_until_eol()) &&
is_line_start(! fill_on)) {
current_paragraph->do_pre();
}
current_paragraph->do_tt();
current_paragraph->do_italic();
} else if (strcmp(fontname, "CB") == 0) {
if ((! fill_on) && (is_courier_until_eol()) &&
is_line_start(! fill_on)) {
current_paragraph->do_pre();
}
current_paragraph->do_tt();
current_paragraph->do_bold();
} else if (strcmp(fontname, "CBI") == 0) {
if ((! fill_on) && (is_courier_until_eol()) &&
is_line_start(! fill_on)) {
current_paragraph->do_pre();
}
current_paragraph->do_tt();
current_paragraph->do_italic();
current_paragraph->do_bold();
}
}
/*
* start_size - from is old font size, to is the new font size.
* The html increase <big> and <small> decrease alters the
* font size by 20%. We try and map these onto glyph sizes.
*/
void html_printer::start_size (int from, int to)
{
if (from < to) {
while (from < to) {
current_paragraph->do_big();
from += SIZE_INCREMENT;
}
} else if (from > to) {
while (from > to) {
current_paragraph->do_small();
from -= SIZE_INCREMENT;
}
}
}
/*
* do_font - checks to see whether we need to alter the html font.
*/
void html_printer::do_font (text_glob *g)
{
/*
* check if the output_style.point_size has not been set yet
* this allow users to place .ps at the top of their troff files
* and grohtml can then treat the .ps value as the base font size (3)
*/
if (output_style.point_size == -1) {
output_style.point_size = pointsize;
}
if (g->text_style.f != output_style.f) {
if (output_style.f != 0) {
end_font(output_style.f->get_name());
}
output_style.f = g->text_style.f;
if (output_style.f != 0) {
start_font(output_style.f->get_name());
}
}
if (output_style.point_size != g->text_style.point_size) {
do_sup_or_sub(g);
if ((output_style.point_size > 0) &&
(g->text_style.point_size > 0)) {
start_size(output_style.point_size, g->text_style.point_size);
}
if (g->text_style.point_size > 0) {
output_style.point_size = g->text_style.point_size;
}
}
if (output_style.col != g->text_style.col) {
current_paragraph->done_color();
output_style.col = g->text_style.col;
current_paragraph->do_color(&output_style.col);
}
}
/*
* start_subscript - returns TRUE if, g, looks like a subscript start.
*/
int html_printer::start_subscript (text_glob *g)
{
int r = font::res;
int height = output_style.point_size*r/72;
return( (output_style.point_size != 0) &&
(output_vpos < g->minv) &&
(output_vpos-height > g->maxv) &&
(output_style.point_size > g->text_style.point_size) );
}
/*
* start_superscript - returns TRUE if, g, looks like a superscript start.
*/
int html_printer::start_superscript (text_glob *g)
{
int r = font::res;
int height = output_style.point_size*r/72;
return( (output_style.point_size != 0) &&
(output_vpos > g->minv) &&
(output_vpos-height < g->maxv) &&
(output_style.point_size > g->text_style.point_size) );
}
/*
* end_subscript - returns TRUE if, g, looks like the end of a subscript.
*/
int html_printer::end_subscript (text_glob *g)
{
int r = font::res;
int height = output_style.point_size*r/72;
return( (output_style.point_size != 0) &&
(g->minv < output_vpos) &&
(output_vpos-height > g->maxv) &&
(output_style.point_size < g->text_style.point_size) );
}
/*
* end_superscript - returns TRUE if, g, looks like the end of a superscript.
*/
int html_printer::end_superscript (text_glob *g)
{
int r = font::res;
int height = output_style.point_size*r/72;
return( (output_style.point_size != 0) &&
(g->minv > output_vpos) &&
(output_vpos-height < g->maxv) &&
(output_style.point_size < g->text_style.point_size) );
}
/*
* do_sup_or_sub - checks to see whether the next glyph is a subscript/superscript
* start/end and it calls the services of html-text to issue the
* appropriate tags.
*/
void html_printer::do_sup_or_sub (text_glob *g)
{
if (! supress_sub_sup) {
if (start_subscript(g)) {
current_paragraph->do_sub();
} else if (start_superscript(g)) {
current_paragraph->do_sup();
} else if (end_subscript(g)) {
current_paragraph->done_sub();
} else if (end_superscript(g)) {
current_paragraph->done_sup();
}
}
}
/*
* do_end_para - writes out the html text after shutting down the
* current paragraph.
*/
void html_printer::do_end_para (text_glob *g)
{
do_font(g);
current_paragraph->done_para();
current_paragraph->remove_para_space();
html.put_string(g->text_string+9);
output_vpos = g->minv;
output_hpos = g->maxh;
output_vpos_max = g->maxv;
supress_sub_sup = FALSE;
}
/*
* emit_html - write out the html text
*/
void html_printer::emit_html (text_glob *g)
{
do_font(g);
determine_space(g);
current_paragraph->do_emittext(g->text_string, g->text_length);
output_vpos = g->minv;
output_hpos = g->maxh;
output_vpos_max = g->maxv;
supress_sub_sup = FALSE;
}
/*
* flush_sbuf - flushes the current sbuf into the list of glyphs.
*/
void html_printer::flush_sbuf()
{
if (sbuf.length() > 0) {
int r=font::res; // resolution of the device
set_style(sbuf_style);
if (overstrike_detected && (! is_bold(sbuf_style.f))) {
font *bold_font = make_bold(sbuf_style.f);
if (bold_font != NULL)
sbuf_style.f = bold_font;
}
page_contents->add(&sbuf_style, sbuf,
line_number,
sbuf_vpos-sbuf_style.point_size*r/72, sbuf_start_hpos,
sbuf_vpos , sbuf_end_hpos);
output_hpos = sbuf_end_hpos;
output_vpos = sbuf_vpos;
last_sbuf_length = 0;
sbuf_prev_hpos = sbuf_end_hpos;
overstrike_detected = FALSE;
sbuf.clear();
}
}
void html_printer::set_line_thickness(const environment *env)
{
line_thickness = env->size;
}
void html_printer::draw(int code, int *p, int np, const environment *env)
{
switch (code) {
case 'l':
# if 0
if (np == 2) {
page_contents->add_line(&sbuf_style,
line_number,
env->hpos, env->vpos, env->hpos+p[0], env->vpos+p[1], line_thickness);
} else {
error("2 arguments required for line");
}
# endif
break;
case 't':
{
if (np == 0) {
line_thickness = -1;
} else {
// troff gratuitously adds an extra 0
if (np != 1 && np != 2) {
error("0 or 1 argument required for thickness");
break;
}
line_thickness = p[0];
}
break;
}
case 'P':
break;
case 'p':
break;
case 'E':
break;
case 'e':
break;
case 'C':
break;
case 'c':
break;
case 'a':
break;
case '~':
break;
case 'f':
break;
case 'F':
// fill with color env->fill
if (background != NULL)
delete background;
background = new color;
*background = *env->fill;
break;
default:
error("unrecognised drawing command `%1'", char(code));
break;
}
}
html_printer::html_printer()
: html(0, MAX_LINE_LENGTH),
no_of_printed_pages(0),
last_sbuf_length(0),
overstrike_detected(FALSE),
output_hpos(-1),
output_vpos(-1),
output_vpos_max(-1),
line_thickness(-1),
inside_font_style(0),
page_number(0),
header_indent(-1),
supress_sub_sup(TRUE),
cutoff_heading(100),
indent(NULL),
table(NULL),
end_center(0),
end_tempindent(0),
next_tag(INLINE),
fill_on(TRUE),
max_linelength(-1),
linelength(0),
pageoffset(0),
troff_indent(0),
device_indent(0),
temp_indent(0),
pointsize(base_point_size),
line_number(0),
background(default_background),
seen_indent(FALSE),
next_indent(0),
seen_pageoffset(FALSE),
next_pageoffset(0),
seen_linelength(FALSE),
next_linelength(0),
seen_center(FALSE),
next_center(0),
seen_space(0),
seen_break(0),
current_column(0),
row_space(FALSE)
{
file_list.add_new_file(xtmpfile());
html.set_file(file_list.get_file());
if (font::hor != 24)
fatal("horizontal resolution must be 24");
if (font::vert != 40)
fatal("vertical resolution must be 40");
#if 0
// should be sorted html..
if (font::res % (font::sizescale*72) != 0)
fatal("res must be a multiple of 72*sizescale");
#endif
int r = font::res;
int point = 0;
while (r % 10 == 0) {
r /= 10;
point++;
}
res = r;
html.set_fixed_point(point);
space_char_index = font::name_to_index("space");
space_width = font::hor;
paper_length = font::paperlength;
linelength = font::res*13/2;
if (paper_length == 0)
paper_length = 11*font::res;
page_contents = new page();
}
/*
* add_to_sbuf - adds character code or name to the sbuf.
*/
void html_printer::add_to_sbuf (int idx, const string &s)
{
if (sbuf_style.f == NULL)
return;
char *html_glyph = NULL;
unsigned int code = sbuf_style.f->get_code(idx);
if (s.empty()) {
if (sbuf_style.f->contains(idx))
html_glyph = (char *)sbuf_style.f->get_special_device_encoding(idx);
else
html_glyph = NULL;
if ((html_glyph == NULL) && (code >= UNICODE_DESC_START))
html_glyph = to_unicode(code);
} else
html_glyph = get_html_translation(sbuf_style.f, s);
last_sbuf_length = sbuf.length();
if (html_glyph == NULL)
sbuf += ((char)code);
else
sbuf += html_glyph;
}
int html_printer::sbuf_continuation (int idx, const char *name,
const environment *env, int w)
{
/*
* lets see whether the glyph is closer to the end of sbuf
*/
if ((sbuf_end_hpos == env->hpos)
|| ((sbuf_prev_hpos < sbuf_end_hpos)
&& (env->hpos < sbuf_end_hpos)
&& ((sbuf_end_hpos-env->hpos < env->hpos-sbuf_prev_hpos)))) {
add_to_sbuf(idx, name);
sbuf_prev_hpos = sbuf_end_hpos;
sbuf_end_hpos += w + sbuf_kern;
return TRUE;
} else {
if ((env->hpos >= sbuf_end_hpos) &&
((sbuf_kern == 0) || (sbuf_end_hpos - sbuf_kern != env->hpos))) {
/*
* lets see whether a space is needed or not
*/
if (env->hpos-sbuf_end_hpos < space_width) {
add_to_sbuf(idx, name);
sbuf_prev_hpos = sbuf_end_hpos;
sbuf_end_hpos = env->hpos + w;
return TRUE;
}
}
}
return FALSE ;
}
/*
* get_html_translation - given the position of the character and its name
* return the device encoding for such character.
*/
char *get_html_translation (font *f, const string &name)
{
int idx;
if ((f == 0) || name.empty())
return NULL;
else {
idx = f->name_to_index((char *)(name + '\0').contents());
if (idx == 0) {
error("character `%s' not found", (name + '\0').contents());
return NULL;
} else
if (f->contains(idx))
return (char *)f->get_special_device_encoding(idx);
else
return NULL;
}
}
/*
* overstrike - returns TRUE if the glyph (i, name) is going to overstrike
* a previous glyph in sbuf.
* If TRUE the font is changed to bold and the previous sbuf
* is flushed.
*/
int html_printer::overstrike(int idx, const char *name, const environment *env, int w)
{
if ((env->hpos < sbuf_end_hpos)
|| ((sbuf_kern != 0) && (sbuf_end_hpos - sbuf_kern < env->hpos))) {
/*
* at this point we have detected an overlap
*/
if (overstrike_detected) {
/* already detected, remove previous glyph and use this glyph */
sbuf.set_length(last_sbuf_length);
add_to_sbuf(idx, name);
sbuf_end_hpos = env->hpos + w;
return TRUE;
} else {
/* first time we have detected an overstrike in the sbuf */
sbuf.set_length(last_sbuf_length); /* remove previous glyph */
if (! is_bold(sbuf_style.f))
flush_sbuf();
overstrike_detected = TRUE;
add_to_sbuf(idx, name);
sbuf_end_hpos = env->hpos + w;
return TRUE;
}
}
return FALSE ;
}
/*
* set_char - adds a character into the sbuf if it is a continuation
* with the previous word otherwise flush the current sbuf
* and add character anew.
*/
void html_printer::set_char(int i, font *f, const environment *env,
int w, const char *name)
{
style sty(f, env->size, env->height, env->slant, env->fontno, *env->col);
if (sty.slant != 0) {
if (sty.slant > 80 || sty.slant < -80) {
error("silly slant `%1' degrees", sty.slant);
sty.slant = 0;
}
}
if (((! sbuf.empty()) && (sty == sbuf_style) && (sbuf_vpos == env->vpos))
&& (sbuf_continuation(i, name, env, w) || overstrike(i, name, env, w)))
return;
flush_sbuf();
if (sbuf_style.f == NULL)
sbuf_style = sty;
add_to_sbuf(i, name);
sbuf_end_hpos = env->hpos + w;
sbuf_start_hpos = env->hpos;
sbuf_prev_hpos = env->hpos;
sbuf_vpos = env->vpos;
sbuf_style = sty;
sbuf_kern = 0;
}
/*
* set_numbered_char - handle numbered characters.
* Negative values are interpreted as unbreakable spaces;
* the value (taken positive) gives the width.
*/
void html_printer::set_numbered_char(int num, const environment *env,
int *widthp)
{
int nbsp_width = 0;
if (num < 0) {
nbsp_width = -num;
num = 160; //
}
int i = font::number_to_index(num);
int fn = env->fontno;
if (fn < 0 || fn >= nfonts) {
error("bad font position `%1'", fn);
return;
}
font *f = font_table[fn];
if (f == 0) {
error("no font mounted at `%1'", fn);
return;
}
if (!f->contains(i)) {
error("font `%1' does not contain numbered character %2",
f->get_name(),
num);
return;
}
int w;
if (nbsp_width)
w = nbsp_width;
else
w = f->get_width(i, env->size);
w = round_width(w);
if (widthp)
*widthp = w;
set_char(i, f, env, w, 0);
}
int html_printer::set_char_and_width(const char *nm, const environment *env,
int *widthp, font **f)
{
int i = font::name_to_index(nm);
int fn = env->fontno;
if (fn < 0 || fn >= nfonts) {
error("bad font position `%1'", fn);
return -1;
}
*f = font_table[fn];
if (*f == 0) {
error("no font mounted at `%1'", fn);
return -1;
}
if (!(*f)->contains(i)) {
if (nm[0] != '\0' && nm[1] == '\0')
error("font `%1' does not contain ascii character `%2'",
(*f)->get_name(),
nm[0]);
else
error("font `%1' does not contain special character `%2'",
(*f)->get_name(),
nm);
return -1;
}
int w = (*f)->get_width(i, env->size);
w = round_width(w);
if (widthp)
*widthp = w;
return i;
}
/*
* write_title - writes the title to this document
*/
void html_printer::write_title (int in_head)
{
if (title.has_been_found) {
if (in_head) {
html.put_string("<title>");
html.put_string(title.text);
html.put_string("</title>").nl().nl();
} else {
title.has_been_written = TRUE;
if (title.with_h1) {
html.put_string("<h1 align=center>");
html.put_string(title.text);
html.put_string("</h1>").nl().nl();
}
}
} else if (in_head) {
// place empty title tags to help conform to `tidy'
html.put_string("<title></title>").nl();
}
}
/*
* write_rule - emits a html rule tag, if the auto_rule boolean is true.
*/
static void write_rule (void)
{
if (auto_rule)
fputs("<hr>\n", stdout);
}
void html_printer::begin_page(int n)
{
page_number = n;
#if defined(DEBUGGING)
html.begin_comment("Page: ").put_string(i_to_a(page_number)).end_comment();;
#endif
no_of_printed_pages++;
output_style.f = 0;
output_style.point_size= -1;
output_space_code = 32;
output_draw_point_size = -1;
output_line_thickness = -1;
output_hpos = -1;
output_vpos = -1;
output_vpos_max = -1;
current_paragraph = new html_text(&html);
do_indent(get_troff_indent(), pageoffset, linelength);
current_paragraph->do_para("", FALSE);
}
void html_printer::end_page(int)
{
flush_sbuf();
flush_page();
}
font *html_printer::make_font(const char *nm)
{
return html_font::load_html_font(nm);
}
void html_printer::do_body (void)
{
if (background == NULL)
fputs("<body>\n\n", stdout);
else {
unsigned int r, g, b;
char buf[6+1];
background->get_rgb(&r, &g, &b);
// we have to scale 0..0xFFFF to 0..0xFF
sprintf(buf, "%.2X%.2X%.2X", r/0x101, g/0x101, b/0x101);
fputs("<body bgcolor=\"#", stdout);
fputs(buf, stdout);
fputs("\">\n\n", stdout);
}
}
/*
* emit_link - generates: <a href="to">name</a>
*/
void html_printer::emit_link (const string &to, const char *name)
{
fputs("<a href=\"", stdout);
fputs(to.contents(), stdout);
fputs("\">", stdout);
fputs(name, stdout);
fputs("</a>", stdout);
}
/*
* write_navigation - writes out the links which navigate between
* file fragments.
*/
void html_printer::write_navigation (const string &top, const string &prev,
const string &next, const string ¤t)
{
int need_bar = FALSE;
if (multiple_files) {
write_rule();
fputs("[ ", stdout);
if ((strcmp(prev.contents(), "") != 0) && prev != top && prev != current) {
emit_link(prev, "prev");
need_bar = TRUE;
}
if ((strcmp(next.contents(), "") != 0) && next != top && next != current) {
if (need_bar)
fputs(" | ", stdout);
emit_link(next, "next");
need_bar = TRUE;
}
if (top != "<standard input>" && (strcmp(top.contents(), "") != 0) && top != current) {
if (need_bar)
fputs(" | ", stdout);
emit_link(top, "top");
}
fputs(" ]\n", stdout);
write_rule();
}
}
/*
* do_file_components - scan the file list copying each temporary
* file in turn. This is used twofold:
*
* firstly to emit section heading links,
* between file fragments if required and
* secondly to generate jobname file fragments
* if required.
*/
void html_printer::do_file_components (void)
{
int fragment_no = 1;
string top;
string prev;
string next;
string current;
file_list.start_of_list();
top = string(job_name);
top += string(".html");
top += '\0';
next = file_list.next_file_name();
next += '\0';
current = next;
while (file_list.get_file() != 0) {
if (fseek(file_list.get_file(), 0L, 0) < 0)
fatal("fseek on temporary file failed");
html.copy_file(file_list.get_file());
fclose(file_list.get_file());
file_list.move_next();
if (file_list.is_new_output_file()) {
if (fragment_no > 1)
write_navigation(top, prev, next, current);
prev = current;
current = next;
next = file_list.next_file_name();
next += '\0';
string split_file = file_list.file_name();
split_file += '\0';
fflush(stdout);
freopen(split_file.contents(), "w", stdout);
fragment_no++;
writeHeadMetaStyle();
write_navigation(top, prev, next, current);
}
if (file_list.are_links_required())
header.write_headings(stdout, TRUE);
}
if (fragment_no > 1)
write_navigation(top, prev, next, current);
else
write_rule();
}
/*
* writeHeadMetaStyle - emits the <head> <meta> and <style> tags and
* related information.
*/
void html_printer::writeHeadMetaStyle (void)
{
fputs("<!DOCTYPE html PUBLIC \"-//W3C//DTD HTML 4.01 Transitional//EN\"\n", stdout);
fputs("\"http://www.w3.org/TR/html4/loose.dtd\">\n", stdout);
fputs("<html>\n", stdout);
fputs("<head>\n", stdout);
fputs("<meta name=\"generator\" "
"content=\"groff -Thtml, see www.gnu.org\">\n", stdout);
fputs("<meta http-equiv=\"Content-Type\" "
"content=\"text/html; charset=US-ASCII\">\n", stdout);
fputs("<meta name=\"Content-Style\" content=\"text/css\">\n", stdout);
fputs("<style type=\"text/css\">\n", stdout);
fputs(" p { margin-top: 0; margin-bottom: 0; }\n", stdout);
fputs(" pre { margin-top: 0; margin-bottom: 0; }\n", stdout);
fputs(" table { margin-top: 0; margin-bottom: 0; }\n", stdout);
fputs("</style>\n", stdout);
}
html_printer::~html_printer()
{
#ifdef LONG_FOR_TIME_T
long t;
#else
time_t t;
#endif
current_paragraph->flush_text();
html.end_line();
html.set_file(stdout);
html.begin_comment("Creator : ")
.put_string("groff ")
.put_string("version ")
.put_string(Version_string)
.end_comment();
t = time(0);
html.begin_comment("CreationDate: ")
.put_string(ctime(&t), strlen(ctime(&t))-1)
.end_comment();
writeHeadMetaStyle();
write_title(TRUE);
head_info += '\0';
fputs(head_info.contents(), stdout);
fputs("</head>\n", stdout);
do_body();
write_title(FALSE);
header.write_headings(stdout, FALSE);
write_rule();
#if defined(DEBUGGING)
html.begin_comment("Total number of pages: ").put_string(i_to_a(no_of_printed_pages)).end_comment();
#endif
html.end_line();
html.end_line();
if (multiple_files) {
fputs("</body>\n", stdout);
fputs("</html>\n", stdout);
do_file_components();
} else {
do_file_components();
fputs("</body>\n", stdout);
fputs("</html>\n", stdout);
}
}
/*
* get_str - returns a dupicate of string, s. The duplicate
* string is terminated at the next ',' or ']'.
*/
static char *get_str (const char *s, char **n)
{
int i=0;
char *v;
while ((s[i] != (char)0) && (s[i] != ',') && (s[i] != ']'))
i++;
if (i>0) {
v = new char[i+1];
memcpy(v, s, i+1);
v[i] = (char)0;
if (s[i] == ',')
(*n) = (char *)&s[i+1];
else
(*n) = (char *)&s[i];
return v;
}
if (s[i] == ',')
(*n) = (char *)&s[1];
else
(*n) = (char *)s;
return NULL;
}
/*
* make_val - creates a string from if s is NULL.
*/
char *make_val (char *s, int v, char *id, char *f, char *l)
{
if (s == NULL) {
char buf[30];
sprintf(buf, "%d", v);
return strsave(buf);
}
else {
/*
* check that value, s, is the same as, v.
*/
char *t = s;
while (*t == '=')
t++;
if (atoi(t) != v) {
if (f == NULL)
f = (char *)"stdin";
if (l == NULL)
l = (char *)"<none>";
fprintf(stderr, "%s:%s: grohtml assertion failed at id%s expecting %d and was given %s\n",
f, l, id, v, s);
}
return s;
}
}
/*
* handle_assertion - handles the assertions created via .www:ASSERT
* in www.tmac. See www.tmac for examples.
* This method should be called as we are
* parsing the ditroff input. It checks the x, y
* position assertions. It does _not_ check the
* troff state assertions as these are unknown at this
* point.
*/
void html_printer::handle_assertion (int minv, int minh, int maxv, int maxh, const char *s)
{
char *n;
char *cmd = get_str(s, &n);
char *id = get_str(n, &n);
char *val = get_str(n, &n);
char *file= get_str(n, &n);
char *line= get_str(n, &n);
if (strcmp(cmd, "assertion:[x") == 0)
as.addx(cmd, id, make_val(val, minh, id, file, line), file, line);
else if (strcmp(cmd, "assertion:[y") == 0)
as.addy(cmd, id, make_val(val, minv, id, file, line), file, line);
else
if (strncmp(cmd, "assertion:[", strlen("assertion:[")) == 0)
page_contents->add_tag(&sbuf_style, string(s),
line_number, minv, minh, maxv, maxh);
}
/*
* build_state_assertion - builds the troff state assertions.
*/
void html_printer::handle_state_assertion (text_glob *g)
{
if (g != NULL && g->is_a_tag() &&
(strncmp(g->text_string, "assertion:[", 11) == 0)) {
char *n = (char *)&g->text_string[11];
char *cmd = get_str(n, &n);
char *val = get_str(n, &n);
(void)get_str(n, &n); // unused
char *file= get_str(n, &n);
char *line= get_str(n, &n);
as.build(cmd, val, file, line);
}
}
/*
* special - handle all x X requests from troff. For post-html they
* allow users to pass raw html commands, turn auto linked
* headings off/on etc.
*/
void html_printer::special(char *s, const environment *env, char type)
{
if (type != 'p')
return;
if (s != 0) {
flush_sbuf();
if (env->fontno >= 0) {
style sty(get_font_from_index(env->fontno), env->size, env->height,
env->slant, env->fontno, *env->col);
sbuf_style = sty;
}
if (strncmp(s, "html:", 5) == 0) {
int r=font::res; /* resolution of the device */
font *f=sbuf_style.f;
if (f == NULL) {
int found=FALSE;
f = font::load_font("TR", &found);
}
/*
* need to pass rest of string through to html output during flush
*/
page_contents->add_and_encode(&sbuf_style, string(&s[5]),
line_number,
env->vpos-env->size*r/72, env->hpos,
env->vpos , env->hpos,
FALSE);
/*
* assume that the html command has no width, if it does then
* hopefully troff will have fudged this in a macro by
* requesting that the formatting move right by the appropriate
* amount.
*/
} else if (strncmp(s, "html</p>:", 9) == 0) {
int r=font::res; /* resolution of the device */
font *f=sbuf_style.f;
if (f == NULL) {
int found=FALSE;
f = font::load_font("TR", &found);
}
/*
* need to pass all of string through to html output during flush
*/
page_contents->add_and_encode(&sbuf_style, string(s),
line_number,
env->vpos-env->size*r/72, env->hpos,
env->vpos , env->hpos,
TRUE);
/*
* assume that the html command has no width, if it does then
* hopefully troff will have fudged this in a macro by
* requesting that the formatting move right by the appropriate
* amount.
*/
} else if (strncmp(s, "index:", 6) == 0) {
cutoff_heading = atoi(&s[6]);
} else if (strncmp(s, "assertion:[", 11) == 0) {
int r=font::res; /* resolution of the device */
handle_assertion(env->vpos-env->size*r/72, env->hpos,
env->vpos, env->hpos, s);
}
}
}
/*
* devtag - handles device troff tags sent from the `troff'.
* These include the troff state machine tags:
* .br, .sp, .in, .tl, .ll etc
*
* (see man 5 grohtml_tags).
*/
void html_printer::devtag (char *s, const environment *env, char type)
{
if (type != 'p')
return;
if (s != 0) {
flush_sbuf();
if (env->fontno >= 0) {
style sty(get_font_from_index(env->fontno), env->size, env->height,
env->slant, env->fontno, *env->col);
sbuf_style = sty;
}
if (strncmp(s, "devtag:", strlen("devtag:")) == 0) {
int r=font::res; /* resolution of the device */
page_contents->add_tag(&sbuf_style, string(s),
line_number,
env->vpos-env->size*r/72, env->hpos,
env->vpos , env->hpos);
}
}
}
/*
* taken from number.cpp in src/roff/troff, [hunits::hunits(units x)]
*/
int html_printer::round_width(int x)
{
int r = font::hor;
int n;
// don't depend on the rounding direction for division of negative integers
if (r == 1)
n = x;
else
n = (x < 0
? -((-x + r/2 - 1)/r)
: (x + r/2 - 1)/r);
return n * r;
}
int main(int argc, char **argv)
{
program_name = argv[0];
static char stderr_buf[BUFSIZ];
setbuf(stderr, stderr_buf);
int c;
static const struct option long_options[] = {
{ "help", no_argument, 0, CHAR_MAX + 1 },
{ "version", no_argument, 0, 'v' },
{ NULL, 0, 0, 0 }
};
while ((c = getopt_long(argc, argv, "a:bdD:F:g:hi:I:j:lno:prs:S:v",
long_options, NULL))
!= EOF)
switch(c) {
case 'a':
/* text antialiasing bits - handled by pre-html */
break;
case 'b':
// set background color to white
default_background = new color;
default_background->set_gray(color::MAX_COLOR_VAL);
break;
case 'd':
/* handled by pre-html */
break;
case 'D':
/* handled by pre-html */
break;
case 'F':
font::command_line_font_dir(optarg);
break;
case 'g':
/* graphic antialiasing bits - handled by pre-html */
break;
case 'h':
/* do not use the Hn headings of html, but manufacture our own */
manufacture_headings = TRUE;
break;
case 'i':
/* handled by pre-html */
break;
case 'I':
/* handled by pre-html */
break;
case 'j':
multiple_files = TRUE;
job_name = optarg;
break;
case 'l':
auto_links = FALSE;
break;
case 'n':
simple_anchors = TRUE;
break;
case 'o':
/* handled by pre-html */
break;
case 'p':
/* handled by pre-html */
break;
case 'r':
auto_rule = FALSE;
break;
case 's':
base_point_size = atoi(optarg);
break;
case 'S':
split_level = atoi(optarg) + 1;
break;
case 'v':
printf("GNU post-grohtml (groff) version %s\n", Version_string);
exit(0);
break;
case CHAR_MAX + 1: // --help
usage(stdout);
exit(0);
break;
case '?':
usage(stderr);
exit(1);
break;
default:
assert(0);
}
if (optind >= argc) {
do_file("-");
} else {
for (int i = optind; i < argc; i++)
do_file(argv[i]);
}
return 0;
}
static void usage(FILE *stream)
{
fprintf(stream, "usage: %s [-vblnh] [-D dir] [-I image_stem] [-F dir] [files ...]\n",
program_name);
}