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Diffstat (limited to 'contrib/groff/grohtml/html.cc')
| -rw-r--r-- | contrib/groff/grohtml/html.cc | 6591 |
1 files changed, 0 insertions, 6591 deletions
diff --git a/contrib/groff/grohtml/html.cc b/contrib/groff/grohtml/html.cc deleted file mode 100644 index 0ee5ce6150d7..000000000000 --- a/contrib/groff/grohtml/html.cc +++ /dev/null @@ -1,6591 +0,0 @@ -// -*- C++ -*- -/* Copyright (C) 1999 Free Software Foundation, Inc. - * - * Gaius Mulley (gaius@glam.ac.uk) wrote grohtml - * but it owes a huge amount of ideas and raw code from - * James Clark (jjc@jclark.com) grops/ps.cc. - */ - -/* -This file is part of groff. - -groff is free software; you can redistribute it and/or modify it under -the terms of the GNU General Public License as published by the Free -Software Foundation; either version 2, or (at your option) any later -version. - -groff is distributed in the hope that it will be useful, but WITHOUT ANY -WARRANTY; without even the implied warranty of MERCHANTABILITY or -FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License -for more details. - -You should have received a copy of the GNU General Public License along -with groff; see the file COPYING. If not, write to the Free Software -Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ - -#include "driver.h" -#include "stringclass.h" -#include "cset.h" - -#include "html.h" -#include "html_chars.h" -#include <time.h> - -#ifdef HAVE_UNISTD_H -#include <unistd.h> -#endif - -extern "C" { - // SunOS 4.1.3 fails to declare this in stdlib.h - char *mktemp(char *); -} - -#include <stdio.h> -#include <fcntl.h> - -#ifndef _POSIX_VERSION - -#ifdef HAVE_LIMITS_H -#include <limits.h> -#endif /* HAVE_LIMITS_H */ - -#ifdef HAVE_DIRENT_H -#include <dirent.h> -#else /* not HAVE_DIRENT_H */ -#ifdef HAVE_SYS_DIR_H -#include <sys/dir.h> -#endif /* HAVE_SYS_DIR_H */ -#endif /* not HAVE_DIRENT_H */ - -#ifndef NAME_MAX -#ifdef MAXNAMLEN -#define NAME_MAX MAXNAMLEN -#else /* !MAXNAMLEN */ -#ifdef MAXNAMELEN -#define NAME_MAX MAXNAMELEN -#else /* !MAXNAMELEN */ -#define NAME_MAX 14 -#endif /* !MAXNAMELEN */ -#endif /* !MAXNAMLEN */ -#endif /* !NAME_MAX */ - -#endif /* not _POSIX_VERSION */ - -#include "nonposix.h" - -#include "ordered_list.h" - -#if !defined(TRUE) -# define TRUE (1==1) -#endif -#if !defined(FALSE) -# define FALSE (1==0) -#endif - -#define MAX_TEMP_NAME 1024 -#define MAX_STRING_LENGTH 4096 -#define MAX_CHAR_SIZE 50 // maximum length of character name - -#define Y_FUDGE_MARGIN +0.83 -#define A4_PAGE_LENGTH (11.6944-Y_FUDGE_MARGIN) -#define DEFAULT_IMAGE_RES 80 -#define IMAGE_BOARDER_PIXELS 10 -#define MAX_WORDS_PER_LINE 1000 // only used for table indentation -#define GAP_SPACES 3 // how many spaces needed to guess a gap? -#define GAP_WIDTH_ONE_LINE 2 // 1/GAP_WIDTH_ONE_LINE inches required for one line table -#define CENTER_TOLERANCE 2 // how many pixels off center will we think a line or region is centered -#define MIN_COLUMN 7 // minimum column size pixels for multiple lines -#define MIN_COLUMN_FOR_TWO_LINES 20 // minimum column size pixels for a 2 line table -#define MIN_TEXT_PERCENT 5 // try and round to this percentage value for used columns -#define PERCENT_THRESHOLD 20 // don't bother trying to increase and width greater than this - - -/* - * Only uncomment one of the following to determine default image type. - */ - -#define IMAGE_DEFAULT_PNG -/* #define IMAGE_DEFAULT_GIF */ - - -#if defined(IMAGE_DEFAULT_GIF) -static enum { gif, png } image_type = gif; -static char *image_device = "gif"; -#elif defined(IMAGE_DEFAULT_PNG) -static enum { gif, png } image_type = png; -static char *image_device = "png256"; -#else -# error "you must define either IMAGE_DEFAULT_GIF or IMAGE_DEFAULT_PNG" -#endif - -static int debug_on = FALSE; -static int guess_on = TRUE; -static int margin_on = FALSE; -static int auto_on = TRUE; -static int table_on = TRUE; -static int image_res = DEFAULT_IMAGE_RES; -static int debug_table_on = FALSE; -static int table_image_on = TRUE; // default is to create images for tbl - -static int linewidth = -1; - -#define DEFAULT_LINEWIDTH 40 /* in ems/1000 */ -#define MAX_LINE_LENGTH 72 -#define FILL_MAX 1000 - -void stop () {} - - -/* - * start with a few favorites - */ - -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_subsection - returns TRUE if a1..a2 is within b1..b2 - */ - -static int is_subsection (int a1, int a2, int b1, int b2) -{ - // easier to see whether this is not the case - return( !((a1 < b1) || (a1 > b2) || (a2 < b1) || (a2 > b2)) ); -} - -/* - * is_intersection - returns TRUE if range a1..a2 intersects with b1..b2 - */ - -static int is_intersection (int a1, int a2, int b1, int b2) -{ - // again 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') ); -} - -/* - * more_than_line_break - returns TRUE should v1 and v2 differ by more than - * a simple line break. - */ - -static int more_than_line_break (int v1, int v2, int size) -{ - return( abs(v1-v2)>size ); -} - -/* - * the class and methods for styles - */ - -struct style { - font *f; - int point_size; - int font_no; - int height; - int slant; - style (); - style (font *, int, int, int, int); - int operator == (const style &) const; - int operator != (const style &) const; -}; - -style::style() - : f(0) -{ -} - -style::style(font *p, int sz, int h, int sl, int no) - : f(p), point_size(sz), font_no(no), height(h), slant(sl) -{ -} - -int style::operator==(const style &s) const -{ - return (f == s.f && point_size == s.point_size - && height == s.height && slant == s.slant); -} - -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[SIZE]; - int used; - char_block *next; - - char_block(); -}; - -char_block::char_block() -: used(0), next(0) -{ -} - -class char_buffer { -public: - char_buffer(); - ~char_buffer(); - char *add_string(char *, unsigned int); -private: - char_block *head; - char_block *tail; -}; - -char_buffer::char_buffer() -: head(0), tail(0) -{ -} - -char_buffer::~char_buffer() -{ - while (head != 0) { - char_block *temp = head; - head = head->next; - delete temp; - } -} - -char *char_buffer::add_string (char *s, unsigned int length) -{ - int i=0; - unsigned int old_used; - - if (tail == 0) { - tail = new char_block; - head = tail; - } else { - if (tail->used + length+1 > char_block::SIZE) { - tail->next = new char_block; - tail = tail->next; - } - } - // at this point we have a tail which is ready for the string. - if (tail->used + length+1 > char_block::SIZE) { - fatal("need to increase char_block::SIZE"); - } - - 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] ); -} - -/* - * the classes and methods for maintaining pages and text positions and graphic regions - */ - -class text_glob { -public: - int is_less (text_glob *a, text_glob *b); - text_glob (style *s, char *string, unsigned int length, - int min_vertical, int min_horizontal, - int max_vertical, int max_horizontal, int is_command, int is_html); - text_glob (void); - ~text_glob (void); - - style text_style; - char *text_string; - unsigned int text_length; - int minv, maxv, minh, maxh; - int is_raw_command; // should the text be sent directly to the device? - int is_html_command; // is the raw command definitely for the html device ie not an eqn? -}; - -text_glob::text_glob (style *s, char *string, unsigned int length, - int min_vertical, int min_horizontal, - int max_vertical, int max_horizontal, int is_command, int is_html) - : text_style(*s), text_string(string), text_length(length), - minv(min_vertical), maxv(max_vertical), minh(min_horizontal), maxh(max_horizontal), - is_raw_command(is_command), is_html_command(is_html) -{ -} - -text_glob::text_glob () - : text_string(0), text_length(0), minv(-1), maxv(-1), minh(-1), maxh(-1), - is_raw_command(FALSE), is_html_command(FALSE) -{ -} - -text_glob::~text_glob () -{ -} - -int text_glob::is_less (text_glob *a, text_glob *b) -{ - if (is_intersection(a->minv+1, a->maxv-1, b->minv+1, b->maxv-1)) { - return( a->minh < b->minh ); - } else { - return( a->maxv < b->maxv ); - } -} - -struct xycoord { - int x; - int y; -}; - -class graphic_glob { -public: - int is_less (graphic_glob *a, graphic_glob *b); - graphic_glob (int troff_code); - graphic_glob (void); - ~graphic_glob (void); - - int minv, maxv, minh, maxh; - int xc, yc; - int nopoints; // number of points allocated in array below - struct xycoord *point; - int size; - int fill; - int code; -}; - -graphic_glob::graphic_glob () - : minv(-1), maxv(-1), minh(-1), maxh(-1), nopoints(0), point(0), size(0), code(0) -{ -} - -graphic_glob::~graphic_glob () -{ - if (point != 0) { - free(point); - } -} - -graphic_glob::graphic_glob (int troff_code) - : minv(-1), maxv(-1), minh(-1), maxh(-1), nopoints(0), point(0), size(0), code(troff_code) -{ -} - -int graphic_glob::is_less (graphic_glob *a, graphic_glob *b) -{ - return( (a->minv < b->minv) || ((a->minv == b->minv) && (a->minh < b->minh)) ); -} - -class region_glob { -public: - region_glob (void); - ~region_glob (void); - int is_less (region_glob *a, region_glob *b); - - int minv, maxv, minh, maxh; -}; - -int region_glob::is_less (region_glob *a, region_glob *b) -{ - return( (a->minv < b->minv) || ((a->minv == b->minv) && (a->minh < b->minh)) ); -} - -region_glob::region_glob (void) - : minv(-1), maxv(-1), minh(-1), maxh(-1) -{ -} - -region_glob::~region_glob (void) -{ -} - -class page { -public: - page (void); - void add (style *s, char *string, unsigned int length, - int min_vertical, int min_horizontal, - int max_vertical, int max_horizontal); - void add_html_command (style *s, char *string, unsigned int length, - int min_vertical, int min_horizontal, - int max_vertical, int max_horizontal); - void add_special_char (style *s, char *string, unsigned int length, - int min_vertical, int min_horizontal, - int max_vertical, int max_horizontal); - void add_line (int code, int x1, int y1, int x2, int y2, int size, int fill); - void add_arc (int code, int xc, int yc, int *p, double *c, int size, int fill); - void add_polygon (int code, int np, int *p, int oh, int ov, int size, int fill); - void add_spline (int code, int xc, int yc, int np, int *p, int size, int fill); - void calculate_region (void); - int is_in_region (graphic_glob *g); - int can_grow_region (graphic_glob *g); - void make_new_region (graphic_glob *g); - int has_line (region_glob *r); - int has_word (region_glob *r); - int no_raw_commands (int minv, int maxv); - - // and the data - - ordered_list <region_glob> regions; // squares of bitmapped pics,eqn,tbl's - ordered_list <text_glob> words; // position of words on page - ordered_list <graphic_glob> lines; // position of lines on page - char_buffer buffer; // all characters for this page - int is_in_graphic; // should graphics and words go below or above - ordered_list <text_glob> region_words; // temporary accumulation of words in a region - ordered_list <graphic_glob> region_lines; // (as above) and used so that we can determine - // the regions vertical limits -}; - -page::page() - : is_in_graphic(FALSE) -{ -} - -void page::add (style *s, char *string, unsigned int length, - int min_vertical, int min_horizontal, - int max_vertical, int max_horizontal) -{ - if (length > 0) { - text_glob *g=new text_glob(s, buffer.add_string(string, length), length, - min_vertical, min_horizontal, max_vertical, max_horizontal, FALSE, FALSE); - if (is_in_graphic) { - region_words.add(g); - } else { - words.add(g); - } - } -} - -/* - * add_html_command - it only makes sense to add html commands when we are not inside - * a graphical entity. - */ - -void page::add_html_command (style *s, char *string, unsigned int length, - int min_vertical, int min_horizontal, - int max_vertical, int max_horizontal) -{ - if ((length > 0) && (! is_in_graphic)) { - text_glob *g=new text_glob(s, buffer.add_string(string, length), length, - min_vertical, min_horizontal, max_vertical, max_horizontal, TRUE, TRUE); - words.add(g); - } -} - -/* - * add_special_char - it only makes sense to add special characters when we are inside - * a graphical entity. - */ - -void page::add_special_char (style *s, char *string, unsigned int length, - int min_vertical, int min_horizontal, - int max_vertical, int max_horizontal) -{ - if ((length > 0) && (is_in_graphic)) { - text_glob *g=new text_glob(s, buffer.add_string(string, length), length, - min_vertical, min_horizontal, max_vertical, max_horizontal, TRUE, FALSE); - region_words.add(g); - } -} - -void page::add_line (int code, int x1, int y1, int x2, int y2, int size, int fill) -{ - graphic_glob *g = new graphic_glob(code); - - g->minh = min(x1, x2); - g->maxh = max(x1, x2); - g->minv = min(y1, y2); - g->maxv = max(y1, y2); - g->point = (struct xycoord *)malloc(sizeof(xycoord)*2); - g->nopoints = 2; - g->point[0].x = x1 ; - g->point[0].y = y1 ; - g->point[1].x = x2 ; - g->point[1].y = y2 ; - g->xc = 0; - g->yc = 0; - g->size = size; - g->fill = fill; - - if (is_in_graphic) { - region_lines.add(g); - } else { - lines.add(g); - } -} - -/* - * assign_min_max_for_arc - works out the smallest box that will encompass an - * arc defined by: origin: g->xc, g->xc - * and vector (p[0], p[1]) and (p[2], p[3]) - */ - -void assign_min_max_for_arc (graphic_glob *g, int *p, double *c) -{ - int radius = (int) sqrt(c[0]*c[0]+c[1]*c[1]); - int xv1 = p[0]; - int yv1 = p[1]; - int xv2 = p[2]; - int yv2 = p[3]; - int x1 = g->xc+xv1; - int y1 = g->yc+yv1; - int x2 = g->xc+xv1+xv2; - int y2 = g->yc+yv1+yv2; - - // firstly lets use the 'circle' limitation - g->minh = x1-radius; - g->maxh = x1+radius; - g->minv = y1-radius; - g->maxv = y1+radius; - - // incidentally I'm sure there is a better way to do this, but I don't know it - // please can someone let me know or "improve" this function - - // now see which min/max can be reduced and increased for the limits of the arc - // - // - // Q2 | Q1 - // -----+----- - // Q3 | Q4 - // - - - if ((xv1>=0) && (yv1>=0)) { - // first vector in Q3 - if ((xv2>=0) && (yv2>=0)) { - // second in Q1 - g->maxh = x2; - g->minv = y1; - } else if ((xv2<0) && (yv2>=0)) { - // second in Q2 - g->maxh = x2; - g->minv = y1; - } else if ((xv2>=0) && (yv2<0)) { - // second in Q4 - g->minv = min(y1, y2); - } else if ((xv2<0) && (yv2<0)) { - // second in Q3 - if (x1>=x2) { - g->minh = x2; - g->maxh = x1; - g->minv = min(y1, y2); - g->maxv = max(y1, y2); - } else { - // xv2, yv2 could all be zero? - } - } - } else if ((xv1>=0) && (yv1<0)) { - // first vector in Q2 - if ((xv2>=0) && (yv2>=0)) { - // second in Q1 - g->maxh = max(x1, x2); - g->minh = min(x1, x2); - g->minv = y1; - } else if ((xv2<0) && (yv2>=0)) { - // second in Q2 - if (x1<x2) { - g->maxh = x2; - g->minh = x1; - g->minv = min(y1, y2); - g->maxv = max(y1, y2); - } else { - // otherwise almost full circle anyway - } - } else if ((xv2>=0) && (yv2<0)) { - // second in Q4 - g->minv = y2; - g->minh = x1; - } else if ((xv2<0) && (yv2<0)) { - // second in Q3 - g->minh = min(x1, x2); - } - } else if ((xv1<0) && (yv1<0)) { - // first vector in Q1 - if ((xv2>=0) && (yv2>=0)) { - // second in Q1 - if (x1<x2) { - g->minh = x1; - g->maxh = x2; - g->minv = min(y1, y2); - g->maxv = max(y1, y2); - } else { - // nearly full circle - } - } else if ((xv2<0) && (yv2>=0)) { - // second in Q2 - g->maxv = max(y1, y2); - } else if ((xv2>=0) && (yv2<0)) { - // second in Q4 - g->minv = min(y1, y2); - g->maxv = max(y1, y2); - g->minh = min(x1, x2); - } else if ((xv2<0) && (yv2<0)) { - // second in Q3 - g->minh = x2; - g->maxv = y1; - } - } else if ((xv1<0) && (yv1>=0)) { - // first vector in Q4 - if ((xv2>=0) && (yv2>=0)) { - // second in Q1 - g->maxh = max(x1, x2); - } else if ((xv2<0) && (yv2>=0)) { - // second in Q2 - g->maxv = max(y1, y2); - g->maxh = max(x1, x2); - } else if ((xv2>=0) && (yv2<0)) { - // second in Q4 - if (x1>=x2) { - g->minv = min(y1, y2); - g->maxv = max(y1, y2); - g->minh = min(x1, x2); - g->maxh = max(x2, x2); - } else { - // nearly full circle - } - } else if ((xv2<0) && (yv2<0)) { - // second in Q3 - g->maxv = max(y1, y2); - g->minh = min(x1, x2); - g->maxh = max(x1, x2); - } - } - // this should *never* happen but if it does it means a case above is wrong.. - - // this code is only present for safety sake - if (g->maxh < g->minh) { - if (debug_on) { - fprintf(stderr, "assert failed minh > maxh\n"); fflush(stderr); - // stop(); - } - g->maxh = g->minh; - } - if (g->maxv < g->minv) { - if (debug_on) { - fprintf(stderr, "assert failed minv > maxv\n"); fflush(stderr); - // stop(); - } - g->maxv = g->minv; - } -} - -void page::add_arc (int code, int xc, int yc, int *p, double *c, int size, int fill) -{ - graphic_glob *g = new graphic_glob(code); - - g->point = (struct xycoord *)malloc(sizeof(xycoord)*2); - g->nopoints = 2; - g->point[0].x = p[0] ; - g->point[0].y = p[1] ; - g->point[1].x = p[2] ; - g->point[1].y = p[3] ; - g->xc = xc; - g->yc = yc; - g->size = size; - g->fill = fill; - - assign_min_max_for_arc(g, p, c); - - if (is_in_graphic) { - region_lines.add(g); - } else { - lines.add(g); - } -} - - -void page::add_polygon (int code, int np, int *p, int oh, int ov, int size, int fill) -{ - graphic_glob *g = new graphic_glob(code); - int j = 0; - int i; - - g->point = (struct xycoord *)malloc(sizeof(xycoord)*np/2); - g->nopoints = np/2; - - for (i=0; i<g->nopoints; i++) { - g->point[i].x = p[j]; - j++; - g->point[i].y = p[j]; - j++; - } - // now calculate min/max - g->minh = g->point[0].x; - g->minv = g->point[0].y; - g->maxh = g->point[0].x; - g->maxv = g->point[0].y; - for (i=1; i<g->nopoints; i++) { - g->minh = min(g->minh, g->point[i].x); - g->minv = min(g->minv, g->point[i].y); - g->maxh = max(g->maxh, g->point[i].x); - g->maxv = max(g->maxv, g->point[i].y); - } - g->size = size; - g->xc = oh; - g->yc = ov; - g->fill = fill; - - if (is_in_graphic) { - region_lines.add(g); - } else { - lines.add(g); - } -} - -void page::add_spline (int code, int xc, int yc, int np, int *p, int size, int fill) -{ - graphic_glob *g = new graphic_glob(code); - int j = 0; - int i; - - g->point = (struct xycoord *)malloc(sizeof(xycoord)*np/2); - g->nopoints = np/2; - - for (i=0; i<g->nopoints; i++) { - g->point[i].x = p[j]; - j++; - g->point[i].y = p[j]; - j++; - } - // now calculate min/max - g->minh = min(g->point[0].x, g->point[0].x/2); - g->minv = min(g->point[0].y, g->point[0].y/2); - g->maxh = max(g->point[0].x, g->point[0].x/2); - g->maxv = max(g->point[0].y, g->point[0].y/2); - - /* tnum/tden should be between 0 and 1; the closer it is to 1 - the tighter the curve will be to the guiding lines; 2/3 - is the standard value */ - const int tnum = 2; - const int tden = 3; - - for (i=1; i<g->nopoints-1; i++) { - g->minh = min(g->minh, g->point[i].x*tnum/(2*tden)); - g->minv = min(g->minv, g->point[i].y*tnum/(2*tden)); - g->maxh = max(g->maxh, g->point[i].x*tnum/(2*tden)); - g->maxv = max(g->maxv, g->point[i].y*tnum/(2*tden)); - - g->minh = min(g->minh, g->point[i].x/2+(g->point[i+1].x*(tden-tden))/(2*tden)); - g->minv = min(g->minv, g->point[i].y/2+(g->point[i+1].y*(tden-tden))/(2*tden)); - g->maxh = max(g->maxh, g->point[i].x/2+(g->point[i+1].x*(tden-tden))/(2*tden)); - g->maxv = max(g->maxv, g->point[i].y/2+(g->point[i+1].y*(tden-tden))/(2*tden)); - - g->minh = min(g->minh, (g->point[i].x-g->point[i].x/2) + g->point[i+1].x/2); - g->minv = min(g->minv, (g->point[i].y-g->point[i].y/2) + g->point[i+1].y/2); - g->maxh = max(g->maxh, (g->point[i].x-g->point[i].x/2) + g->point[i+1].x/2); - g->maxv = max(g->maxv, (g->point[i].y-g->point[i].y/2) + g->point[i+1].y/2); - } - i = g->nopoints-1; - - g->minh = min(g->minh, (g->point[i].x-g->point[i].x/2)) + xc; - g->minv = min(g->minv, (g->point[i].y-g->point[i].y/2)) + yc; - g->maxh = max(g->maxh, (g->point[i].x-g->point[i].x/2)) + xc; - g->maxv = max(g->maxv, (g->point[i].y-g->point[i].y/2)) + yc; - - g->size = size; - g->xc = xc; - g->yc = yc; - g->fill = fill; - - if (is_in_graphic) { - region_lines.add(g); - } else { - lines.add(g); - } -} - -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; - char text[MAX_STRING_LENGTH]; -}; - - -title_desc::title_desc () - : has_been_written(FALSE), has_been_found(FALSE) -{ -} - -title_desc::~title_desc () -{ -} - -class header_desc { -public: - header_desc (); - ~header_desc (); - - int no_of_headings; // how many headings have we found? - char_buffer headings; // all the headings used in the document - ordered_list <text_glob> headers; - int header_level; // current header level - int written_header; // have we written the header yet? - char header_buffer[MAX_STRING_LENGTH]; // current header text - - void write_headings (FILE *f); -}; - -header_desc::header_desc () - : no_of_headings(0), header_level(2), written_header(0) -{ -} - -header_desc::~header_desc () -{ -} - -/* - * paragraph_type - alignment for a new paragraph - */ - -typedef enum { left_alignment, center_alignment } paragraph_type; - -/* - * text_defn - defines the limit of text, initially these are stored in the - * column array as words. Later we examine the white space between - * the words in successive lines to find out whether we can detect - * distinct columns. The columns are generated via html tables. - */ - -struct text_defn { - int left; // the start of a word or text - int right; // the end of the text and beginning of white space - int is_used; // will this this column be used for words or space - int right_hits; // count of the number of words touching right position - int percent; // what percentage width should we use for this cell? -}; - -/* - * introduce a paragraph class so that we can nest paragraphs - * from plain html text and html tables. - */ - -class html_paragraph { -public: - html_paragraph (int in, int need, paragraph_type type, html_paragraph *prev); - ~html_paragraph (); - - int in_paragraph; - int need_paragraph; - paragraph_type para_type; - html_paragraph *previous; -}; - -/* - * html_paragraph - constructor, fill in the public fields. - */ - -html_paragraph::html_paragraph (int in, int need, paragraph_type type, html_paragraph *prev) - : in_paragraph(in), need_paragraph(need), - para_type(type), previous(prev) -{ -} - -/* - * html_paragraph - deconstructor - */ - -html_paragraph::~html_paragraph () -{ -} - -/* - * note that html_tables are currently only used to provide a better - * indentation mechanism for html text (in particular it allows grohtml - * to render .IP and .2C together with autoformatting). - */ - -class html_table { -public: - html_table (); - ~html_table (); - - int no_of_columns; // how many columns are we using? - struct text_defn *columns; // left and right margins for each column - int vertical_limit; // the limit of the table - int wrap_margin; // is the current rightmost margin able to wrap words? -}; - -html_table::html_table () - : no_of_columns(0), columns(0), vertical_limit(0), wrap_margin(0) -{ -} - -html_table::~html_table () -{ -} - -class html_printer : public printer { - FILE *tempfp; - simple_output html; - simple_output troff; - int res; - int postscript_res; - int space_char_index; - int no_of_printed_pages; - int paper_length; - enum { SBUF_SIZE = 8192 }; - char sbuf[SBUF_SIZE]; - int sbuf_len; - int sbuf_start_hpos; - int sbuf_vpos; - int sbuf_end_hpos; - int sbuf_kern; - style sbuf_style; - int sbuf_dmark_hpos; - style output_style; - int output_hpos; - int output_vpos; - int output_draw_point_size; - int line_thickness; - int output_line_thickness; - int fill; - unsigned char output_space_code; - string defs; - char *inside_font_style; - int page_number; - title_desc title; - header_desc header; - int header_indent; - page *page_contents; - html_table indentation; - int left_margin_indent; - int right_margin_indent; - int need_one_newline; - int issued_newline; - html_paragraph *current_paragraph; - char image_name[MAX_STRING_LENGTH]; - int image_number; - int graphic_level; - int supress_sub_sup; - - int start_region_vpos; - int start_region_hpos; - int end_region_vpos; - int end_region_hpos; - int cutoff_heading; - - struct graphic_glob *start_graphic; - struct text_glob *start_text; - - 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 change_font (text_glob *g, int is_to_html); - void terminate_current_font (void); - void flush_font (void); - void flush_page (void); - void add_char_to_sbuf (unsigned char code); - void add_to_sbuf (char code, const char *name); - void display_word (text_glob *g, int is_to_html); - void html_display_word (text_glob *g); - void troff_display_word (text_glob *g); - void display_line (graphic_glob *g, int is_to_html); - void display_fill (graphic_glob *g); - void calculate_margin (void); - void traverse_page_regions (void); - void dump_page (void); - int is_within_region (graphic_glob *g); - int is_within_region (text_glob *t); - int is_less (graphic_glob *g, text_glob *t); - void display_globs (int is_to_html); - void move_horizontal (text_glob *g, int left_margin); - void move_vertical (text_glob *g, paragraph_type p); - void write_html_font_face (const char *fontname, const char *left, const char *right); - void write_html_font_type (const char *fontname, const char *left, const char *right); - void html_change_font (text_glob *g, const char *fontname, int size); - char *html_position_text (text_glob *g, int left_margin, int right_margin); - int html_position_region (void); - void troff_change_font (const char *fontname, int size, int font_no); - void troff_position_text (text_glob *g); - int pretend_is_on_same_line (text_glob *g, int left_margin, int right_margin); - int is_on_same_line (text_glob *g, int vpos); - int looks_like_subscript (text_glob *g); - int looks_like_superscript (text_glob *g); - int looks_like_smaller_font (text_glob *g); - int looks_like_larger_font (text_glob *g); - void begin_paragraph (paragraph_type p); - void begin_paragraph_no_height (paragraph_type p); - void force_begin_paragraph (void); - void end_paragraph (void); - void save_paragraph (void); - void restore_paragraph (void); - void html_newline (void); - void convert_to_image (char *troff_src, char *image_name); - void write_title (int in_head); - void find_title (void); - int is_bold (text_glob *g); - void write_header (text_glob *g); - void determine_header_level (void); - void build_header (text_glob *g); - void make_html_indent (int indent); - int is_whole_line_bold (text_glob *g); - int is_a_header (text_glob *g); - int processed_header (text_glob *g); - void make_new_image_name (void); - void calculate_region_margins (region_glob *r); - void remove_redundant_regions (void); - void remove_duplicate_regions (void); - void move_region_to_page (void); - void calculate_region_range (graphic_glob *r); - void flush_graphic (void); - void write_string (graphic_glob *g, int is_to_html); - void prologue (void); - int gs_x (int x); - int gs_y (int y); - void display_regions (void); - int check_able_to_use_table (text_glob *g); - int using_table_for_indent (void); - int collect_columns (struct text_defn *next_words, struct text_defn *next_cols, - struct text_defn *last_words, struct text_defn *last_cols, - int max_words); - void include_into_list (struct text_defn *line, struct text_defn *item); - int is_in_column (struct text_defn *line, struct text_defn *item, int max_words); - int is_column_match (struct text_defn *match, struct text_defn *line1, - struct text_defn *line2, int max_words); - int count_columns (struct text_defn *line); - void rewind_text_to (text_glob *g); - int found_use_for_table (text_glob *start); - void column_display_word (int cell, int vert, int left, int right, int next); - void start_table (void); - void end_table (void); - void foreach_column_include_text (text_glob *start); - void define_cell (int i); - int column_calculate_left_margin (int left, int right); - int column_calculate_right_margin (int left, int right); - void display_columns (const char *word, const char *name, text_defn *line); - void calculate_right (struct text_defn *line, int max_words); - void determine_right_most_column (struct text_defn *line, int max_words); - int remove_white_using_words (struct text_defn *next_guess, struct text_defn *last_guess, struct text_defn *next_line); - void copy_line (struct text_defn *dest, struct text_defn *src); - void combine_line (struct text_defn *dest, struct text_defn *src); - int conflict_with_words (struct text_defn *column_guess, struct text_defn *words); - void remove_entry_in_line (struct text_defn *line, int j); - void remove_redundant_columns (struct text_defn *line); - void add_column_gaps (struct text_defn *line); - int continue_searching_column (text_defn *next_col, text_defn *last_col, text_defn *all_words); - void add_right_full_width (struct text_defn *line, int mingap); - int is_continueous_column (text_defn *last_col, text_defn *next_line); - int is_exact_left (text_defn *last_col, text_defn *next_line); - int find_column_index_in_line (text_glob *t, text_defn *line); - void emit_space (text_glob *g, int force_space); - int is_in_middle (int left, int right); - int check_able_to_use_center (text_glob *g); - void write_centered_line (text_glob *g); - int single_centered_line (text_defn *first, text_defn *second, text_glob *g); - int determine_row_limit (text_glob *start, int v); - void assign_used_columns (text_glob *start); - int find_column_index (text_glob *t); - int large_enough_gap (text_defn *last_col); - int is_worth_column (int left, int right); - int is_subset_of_columns (text_defn *a, text_defn *b); - void count_hits (text_defn *col, int no_of_columns, int limit); - void count_right_hits (text_defn *col, int no_of_columns); - int calculate_min_gap (text_glob *g); - int right_indentation (struct text_defn *last_guess); - void calculate_percentage_width (text_glob *start); - int able_to_steal_width (void); - int need_to_steal_width (void); - int can_distribute_fairly (void); - void utilize_round_off (void); - int will_wrap_text (int i, text_glob *start); - int next_line_on_left_column (int i, text_glob *start); - void remove_table_column (int i); - void remove_unnecessary_unused (text_glob *start); - int is_small_table (int lines, struct text_defn *last_guess, - struct text_defn *words_1, struct text_defn *cols_1, - struct text_defn *words_2, struct text_defn *cols_2, - int *limit, int *limit_1); - int is_column_subset (struct text_defn *cols_1, struct text_defn *cols_2); - int is_appropriate_to_start_table (struct text_defn *cols_1, struct text_defn *cols_2, - struct text_defn *last_guess); - int is_a_full_width_column (void); - int right_most_column (struct text_defn *col); - int large_enough_gap_for_two (struct text_defn *col); - void remove_zero_percentage_column (void); - void translate_to_html (text_glob *g); - int html_knows_about (char *troff); - void determine_diacritical_mark (const char *name, const environment *env); - int sbuf_continuation (unsigned char code, const char *name, const environment *env, int w); - char *remove_last_char_from_sbuf (); - const char *check_diacritical_combination (unsigned char code, const char *name); - int seen_backwards_escape (char *s, int l); - int should_defer_table (int lines, struct text_glob *start, struct text_defn *cols_1); - int is_new_exact_right (struct text_defn *last_guess, struct text_defn *last_cols, struct text_defn *next_cols); - void issue_left_paragraph (void); - void adjust_margin_percentages (void); - int total_percentages (void); - int get_left (void); - void can_loose_column (text_glob *start, struct text_defn *last_guess, int limit); - int check_lack_of_hits (struct text_defn *next_guess, struct text_defn *last_guess, text_glob *start, int limit); - int is_in_table (void); - - // ADD HERE - -public: - html_printer(); - ~html_printer(); - void set_char(int i, font *f, const environment *env, int w, const char *name); - 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); - font *make_font(const char *); - void end_of_line(); -}; - -html_printer::html_printer() -: html(0, MAX_LINE_LENGTH), - troff(0, MAX_LINE_LENGTH), - no_of_printed_pages(0), - sbuf_len(0), - sbuf_dmark_hpos(-1), - output_hpos(-1), - output_vpos(-1), - line_thickness(-1), - fill(FILL_MAX + 1), - inside_font_style(0), - page_number(0), - header_indent(-1), - left_margin_indent(0), - right_margin_indent(0), - need_one_newline(0), - issued_newline(0), - image_number(0), - graphic_level(0), - supress_sub_sup(TRUE), - start_region_vpos(0), - start_region_hpos(0), - end_region_vpos(0), - end_region_hpos(0), - cutoff_heading(100) -{ - tempfp = xtmpfile(); - html.set_file(tempfp); - if (linewidth < 0) - linewidth = DEFAULT_LINEWIDTH; - if (font::hor != 1) - fatal("horizontal resolution must be 1"); - if (font::vert != 1) - fatal("vertical resolution must be 1"); -#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"); - paper_length = font::paperlength; - if (paper_length == 0) - paper_length = 11*font::res; - page_contents = new page; - - postscript_res = 72000; - current_paragraph = new html_paragraph(FALSE, FALSE, left_alignment, 0); -} - -/* - * add_char_to_sbuf - adds a single character to the sbuf. - */ - -void html_printer::add_char_to_sbuf (unsigned char code) -{ - if (sbuf_len < SBUF_SIZE) { - sbuf[sbuf_len] = code; - sbuf_len++; - } else { - fatal("need to increase SBUF_SIZE"); - } -} - -/* - * add_to_sbuf - adds character code or name to the sbuf. - * It escapes \ with \\ - * We need to preserve the name of characters if they exist - * because we may need to send this character to two different - * devices: html and postscript. - */ - -void html_printer::add_to_sbuf (char code, const char *name) -{ - if (name == 0) { - if (code == '\\') { - add_char_to_sbuf('\\'); - } - add_char_to_sbuf(code); - } else { - int l=strlen(name); - int i=0; - - add_char_to_sbuf('\\'); - add_char_to_sbuf('('); - while (i<l) { - if (name[i] == '\\') { - add_char_to_sbuf('\\'); - } - add_char_to_sbuf(name[i]); - i++; - } - add_char_to_sbuf('\\'); - add_char_to_sbuf(')'); - } -} - -int html_printer::sbuf_continuation (unsigned char code, const char *name, - const environment *env, int w) -{ - if ((sbuf_end_hpos == env->hpos) || (sbuf_dmark_hpos == env->hpos)) { - name = check_diacritical_combination(code, name); - add_to_sbuf(code, name); - determine_diacritical_mark(name, env); - sbuf_end_hpos += w + sbuf_kern; - return( TRUE ); - } else { - if ((sbuf_len < SBUF_SIZE-1) && (env->hpos >= sbuf_end_hpos) && - ((sbuf_kern == 0) || (sbuf_end_hpos - sbuf_kern != env->hpos))) { - /* - * lets see whether a space is needed or not - */ - int space_width = sbuf_style.f->get_space_width(sbuf_style.point_size); - - if (env->hpos-sbuf_end_hpos < space_width) { - name = check_diacritical_combination(code, name); - add_to_sbuf(code, name); - determine_diacritical_mark(name, env); - sbuf_end_hpos = env->hpos + w; - return( TRUE ); - } - } else if ((sbuf_len > 0) && (sbuf_dmark_hpos)) { - /* - * check whether the diacritical mark is on the same character - */ - int space_width = sbuf_style.f->get_space_width(sbuf_style.point_size); - - if (abs(sbuf_dmark_hpos-env->hpos) < space_width) { - name = check_diacritical_combination(code, name); - add_to_sbuf(code, name); - determine_diacritical_mark(name, env); - sbuf_end_hpos = env->hpos + w; - return( TRUE ); - } - } - } - return( FALSE ); -} - -/* - * seen_backwards_escape - returns TRUE if we can see a escape at position i..l in s - */ - -int html_printer::seen_backwards_escape (char *s, int l) -{ - /* - * this is tricky so it is broken into components for clarity - * (we let the compiler put in all back into a complex expression) - */ - if ((l>0) && (sbuf[l] == '(') && (sbuf[l-1] == '\\')) { - /* - * ok seen '\(' but we must now check for '\\(' - */ - if ((l>1) && (sbuf[l-2] == '\\')) { - /* - * escaped the escape - */ - return( FALSE ); - } else { - return( TRUE ); - } - } else { - return( FALSE ); - } -} - -/* - * reverse - return reversed string. - */ - -char *reverse (char *s) -{ - int i=0; - int j=strlen(s)-1; - char t; - - while (i<j) { - t = s[i]; - s[i] = s[j]; - s[j] = t; - i++; - j--; - } - return( s ); -} - -/* - * remove_last_char_from_sbuf - removes the last character from sbuf. - */ - -char *html_printer::remove_last_char_from_sbuf () -{ - int l=sbuf_len; - static char last[MAX_STRING_LENGTH]; - - if (l>0) { - l--; - if ((sbuf[l] == ')') && (l>0) && (sbuf[l-1] == '\\')) { - /* - * found terminating escape - */ - int i=0; - - l -= 2; - while ((l>0) && (! seen_backwards_escape(sbuf, l))) { - if (sbuf[l] == '\\') { - if (sbuf[l-1] == '\\') { - last[i] = sbuf[l]; - i++; - l--; - } - } else { - last[i] = sbuf[l]; - i++; - } - l--; - } - last[i] = (char)0; - sbuf_len = l; - if (seen_backwards_escape(sbuf, l)) { - sbuf_len--; - } - return( reverse(last) ); - } else { - if ((sbuf[l] == '\\') && (l>0) && (sbuf[l-1] == '\\')) { - l -= 2; - sbuf_len = l; - return( "\\" ); - } else { - sbuf_len--; - last[0] = sbuf[sbuf_len]; - last[1] = (char)0; - return( last ); - } - } - } else { - return( NULL ); - } -} - -/* - * check_diacriticial_combination - checks to see whether the character code - * if combined with the previous diacriticial mark - * forms a new character. - */ - -const char *html_printer::check_diacritical_combination (unsigned char code, const char *name) -{ - static char troff_char[2]; - - if ((name == 0) && (sbuf_dmark_hpos >= 0)) { - // last character was a diacritical mark - char *last = remove_last_char_from_sbuf(); - - int i=0; - int j; - - while (diacritical_table[i].mark != NULL) { - if (strcmp(diacritical_table[i].mark, last) == 0) { - j=0; - while ((diacritical_table[i].second_troff_char[j] != (char)0) && - (diacritical_table[i].second_troff_char[j] != code)) { - j++; - } - if (diacritical_table[i].second_troff_char[j] == code) { - troff_char[0] = diacritical_table[i].translation; - troff_char[1] = code; - troff_char[2] = (char)0; - return( troff_char ); - } - } - i++; - } - add_to_sbuf(last[0], last); - } - return( name ); -} - -/* - * determine_diacritical_mark - if name is a diacriticial mark the record the position. - * --fixme-- is there a better way of doing this - * this must be done in troff somewhere. - */ - -void html_printer::determine_diacritical_mark (const char *name, const environment *env) -{ - if (name != 0) { - int i=0; - - while (diacritical_table[i].mark != NULL) { - if (strcmp(name, diacritical_table[i].mark) == 0) { - sbuf_dmark_hpos = env->hpos; - return; - } - i++; - } - } - sbuf_dmark_hpos = -1; -} - -/* - * 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) -{ - unsigned char code = f->get_code(i); - -#if 0 - if (code == ' ') { - stop(); - } -#endif - style sty(f, env->size, env->height, env->slant, env->fontno); - if (sty.slant != 0) { - if (sty.slant > 80 || sty.slant < -80) { - error("silly slant `%1' degrees", sty.slant); - sty.slant = 0; - } - } - if ((name != 0) && (page_contents->is_in_graphic)) { - flush_sbuf(); - int r=font::res; // resolution of the device - page_contents->add_special_char(&sty, (char *)name, strlen(name), - env->vpos-sty.point_size*r/72, env->hpos, - env->vpos , env->hpos+w); - sbuf_end_hpos = env->hpos + w; - sbuf_start_hpos = env->hpos; - sbuf_vpos = env->vpos; - sbuf_style = sty; - sbuf_kern = 0; - } else { - if ((sbuf_len > 0) && (sbuf_len < SBUF_SIZE) && (sty == sbuf_style) && - (sbuf_vpos == env->vpos) && (sbuf_continuation(code, name, env, w))) { - return; - } else { - flush_sbuf(); - sbuf_len = 0; - add_to_sbuf(code, name); - determine_diacritical_mark(name, env); - sbuf_end_hpos = env->hpos + w; - sbuf_start_hpos = env->hpos; - sbuf_vpos = env->vpos; - sbuf_style = sty; - sbuf_kern = 0; - } - } -} - -/* - * file_name_max - return the maximum file-name length permitted - * by the underlying filesystem. - * - * (Code shamelessly stolen from indxbib/dirnamemax.c.) - */ - -static size_t -file_name_max (const char *fname) -{ -#ifdef _POSIX_VERSION - return pathconf (fname, _PC_NAME_MAX); -#else - return NAME_MAX; -#endif -} - - -/* - * make_new_image_name - creates a new file name ready for a image file. - */ - -void html_printer::make_new_image_name (void) -{ - image_number++; - - if ((current_filename == 0) || - (strcmp(current_filename, "<standard input>") == 0) || - (strcmp(current_filename, "-") == 0) || - (strcspn(current_filename, DIR_SEPS) < strlen(current_filename))) { - if (file_name_max(".") > 14) - sprintf(image_name, "groff-html-%d-%ld", image_number, (long)getpid()); - else - // The "-gh" part might be truncated on MS-DOS, but there's enough - // space for the PID and up to 99 image numbers. That's why "-gh" - // comes last. - sprintf(image_name, "%d-%ld-gh", image_number, (long)getpid()); - } else if (file_name_max(".") > 14) { - sprintf(image_name, "%s-%d-%ld", current_filename, image_number, (long)getpid()); - } else { // see the commentary above - sprintf(image_name, "%d-%ld-%s", - image_number, (long)getpid(), current_filename); - // Make sure image_name does not have a dot in its trunk, since - // convert_to_image will append .gif or .png to it, and DOS doesn't - // allow more than a single dot in a file name. - int i = strlen(image_name); - for ( ; i > 0; i--) { - if (strchr(DIR_SEPS, image_name[i - 1])) - break; - if (image_name[i - 1] == '.') { - image_name[i - 1] = '\0'; - break; - } - } - } -} - -/* - * 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>\n"); - } else { - title.has_been_written = TRUE; - html.put_string("<h1 align=center>"); - html.put_string(title.text); - html.put_string("</h1>\n"); - } - } -} - -/* - * 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, char *name) -{ - int index; - - if ((f == 0) || (name == 0) || (strcmp(name, "") == 0)) { - return( NULL ); - } else { - index = f->name_to_index(name); - if (index == 0) { - error("character `%s' not found", name); - return( NULL ); - } else { - return( (char *)f->get_special_device_encoding(index) ); - } - } -} - -/* - * str_translate_to_html - converts a string, str, into html text. It places - * the output input buffer, buf. It truncates string, str, if - * there is not enough space in buf. - * It looks up the html character encoding of single characters - * if, and_single, is TRUE. Characters such as < > & etc. - */ - -void str_translate_to_html (font *f, char *buf, int buflen, char *str, int len, int and_single) -{ - int l; - char *translation; - int e; - char escaped_char[MAX_STRING_LENGTH]; - int i=0; - int b=0; - int t=0; - -#if 0 - if (strcmp(str, "\\(\\\\-\\)") == 0) { - stop(); - } -#endif - while (str[i] != (char)0) { - if ((str[i]=='\\') && (i+1<len)) { - i++; // skip the leading backslash - if (str[i] == '(') { - // start of escape - i++; - e = 0; - while ((str[i] != (char)0) && - (! ((str[i] == '\\') && (i+1<len) && (str[i+1] == ')')))) { - if (str[i] == '\\') { - i++; - } - escaped_char[e] = str[i]; - e++; - i++; - } - if ((str[i] == '\\') && (i+1<len) && (str[i+1] == ')')) { - i += 2; - } - escaped_char[e] = (char)0; - if (e > 0) { - translation = get_html_translation(f, escaped_char); - if (translation) { - l = strlen(translation); - t = max(0, min(l, buflen-b)); - strncpy(&buf[b], translation, t); - b += t; - } else { - int index=f->name_to_index(escaped_char); - - if (index != 0) { - buf[b] = f->get_code(index); - b++; - } - } - } - } - } else { - if (and_single) { - char name[2]; - - name[0] = str[i]; - name[1] = (char)0; - translation = get_html_translation(f, name); - if (translation) { - l = strlen(translation); - t = max(0, min(l, buflen-b)); - strncpy(&buf[b], translation, t); - b += t; - } else { - if (b<buflen) { - buf[b] = str[i]; - b++; - } - } - } else { - /* - * do not attempt to encode single characters - */ - if (b<buflen) { - buf[b] = str[i]; - b++; - } - } - i++; - } - } - buf[min(b, buflen)] = (char)0; -} - -/* - * find_title - finds a title to this document, if it exists. - */ - -void html_printer::find_title (void) -{ - text_glob *t; - int r=font::res; - int removed_from_head; - char buf[MAX_STRING_LENGTH]; - - if ((page_number == 1) && (guess_on)) { - if (! page_contents->words.is_empty()) { - - int end_title_hpos = 0; - int start_title_vpos = 0; - int found_title_start = FALSE; - int height = 0; - int start_region =-1; - - if (! page_contents->regions.is_empty()) { - region_glob *r; - - page_contents->regions.start_from_head(); - r = page_contents->regions.get_data(); - if (r->minv > 0) { - start_region = r->minv; - } - } - - page_contents->words.start_from_head(); - do { - t = page_contents->words.get_data(); - removed_from_head = FALSE; - if ((found_title_start) && (start_region != -1) && (t->maxv >= start_region)) { - /* - * we have just encountered the first graphic region so - * we stop looking for a title. - */ - title.has_been_found = TRUE; - return; - } else if (t->is_raw_command) { - // skip raw commands - page_contents->words.move_right(); // move onto next word - } else if ((!found_title_start) && (t->minh > left_margin_indent) && - ((start_region == -1) || (t->maxv < start_region))) { - start_title_vpos = t->minv; - end_title_hpos = t->minh; - str_translate_to_html(t->text_style.f, buf, MAX_STRING_LENGTH, t->text_string, t->text_length, TRUE); - strcpy((char *)title.text, buf); - height = t->text_style.point_size*r/72; - found_title_start = TRUE; - page_contents->words.sub_move_right(); - removed_from_head = ((!page_contents->words.is_empty()) && - (page_contents->words.is_equal_to_head())); - } else if (found_title_start) { - if ((t->minv == start_title_vpos) || - ((!more_than_line_break(start_title_vpos, t->minv, (height*3)/2)) && - (t->minh > left_margin_indent)) || - (is_bold(t) && (t->minh > left_margin_indent))) { - start_title_vpos = min(t->minv, start_title_vpos); - end_title_hpos = max(t->maxh, end_title_hpos); - strcat(title.text, " "); - str_translate_to_html(t->text_style.f, buf, MAX_STRING_LENGTH, t->text_string, t->text_length, TRUE); - strcat(title.text, buf); - page_contents->words.sub_move_right(); - removed_from_head = ((!page_contents->words.is_empty()) && - (page_contents->words.is_equal_to_head())); - } else { - // end of title - title.has_been_found = TRUE; - return; - } - } else if (t->minh <= left_margin_indent) { - // no margin exists - return; - } else { - // move onto next word - page_contents->words.move_right(); - } - } while ((! page_contents->words.is_equal_to_head()) || (removed_from_head)); - } - } -} - -/* - * html_newline - generates a newline <br> - */ - -void html_printer::html_newline (void) -{ - int r = font::res; - int height = output_style.point_size*r/72; - - if (current_paragraph->in_paragraph) { - // safe to generate a pretty newline - html.put_string("<br>\n"); - } else { - html.put_string("<br>"); - } - output_vpos += height; - issued_newline = TRUE; -} - -/* - * issue_left_paragraph - emits a left paragraph together with appropriate - * margin if header_indent is < left_margin_indent. - */ - -void html_printer::issue_left_paragraph (void) -{ - if ((header_indent < left_margin_indent) && (! using_table_for_indent())) { - html.put_string("<p style=\"margin-left: "); - html.put_number(((left_margin_indent-header_indent)*100)/(right_margin_indent-header_indent)); - html.put_string("%\">"); - } else { - html.put_string("<p>"); - } -} - -/* - * force_begin_paragraph - force the begin_paragraph to be emitted. - */ - -void html_printer::force_begin_paragraph (void) -{ - if (current_paragraph->in_paragraph && current_paragraph->need_paragraph) { - switch (current_paragraph->para_type) { - - case left_alignment: issue_left_paragraph(); - break; - case center_alignment: html.put_string("<p align=center>"); - break; - default: fatal("unknown paragraph alignment type"); - } - current_paragraph->need_paragraph = FALSE; - } -} - -/* - * begin_paragraph - starts a new paragraph. It does nothing if a paragraph - * has already been started. - */ - -void html_printer::begin_paragraph (paragraph_type p) -{ - if (! current_paragraph->in_paragraph) { - int r = font::res; - int height = output_style.point_size*r/72; - - if (output_vpos >=0) { - // we leave it alone if it is set to the top of page - output_vpos += height; - } - current_paragraph->need_paragraph = TRUE; // delay the <p> just in case we don't actually emit text - current_paragraph->in_paragraph = TRUE; - current_paragraph->para_type = p; - issued_newline = TRUE; - } -} - - -/* - * begin_paragraph_no_height - starts a new paragraph. It does nothing if a paragraph - * has already been started. Note it does not alter output_vpos. - */ - -void html_printer::begin_paragraph_no_height (paragraph_type p) -{ - if (! current_paragraph->in_paragraph) { - current_paragraph->need_paragraph = TRUE; // delay the <p> just in case we don't actually emit text - current_paragraph->in_paragraph = TRUE; - current_paragraph->para_type = p; - issued_newline = TRUE; - } -} - -/* - * end_paragraph - end the current paragraph. It does nothing if a paragraph - * has not been started. - */ - -void html_printer::end_paragraph (void) -{ - if (current_paragraph->in_paragraph) { - // check whether we have generated any text inbetween the potential paragraph begin end - if (! current_paragraph->need_paragraph) { - int r = font::res; - int height = output_style.point_size*r/72; - - output_vpos += height; - terminate_current_font(); - html.put_string("</p>\n"); - } else { - terminate_current_font(); - } - current_paragraph->para_type = left_alignment; - current_paragraph->in_paragraph = FALSE; - } -} - -/* - * save_paragraph - saves the current paragraph state and - * creates new paragraph state. - */ - -void html_printer::save_paragraph (void) -{ - if (current_paragraph == 0) { - fatal("current_paragraph is NULL"); - } - current_paragraph = new html_paragraph(current_paragraph->in_paragraph, - current_paragraph->need_paragraph, - current_paragraph->para_type, - current_paragraph); - terminate_current_font(); -} - -/* - * restore_paragraph - restores the previous paragraph state. - */ - -void html_printer::restore_paragraph (void) -{ - html_paragraph *old = current_paragraph; - - current_paragraph = current_paragraph->previous; - free(old); -} - -/* - * calculate_margin - runs through the words and graphics globs - * and finds the start of the left most margin. - */ - -void html_printer::calculate_margin (void) -{ - text_glob *w; - graphic_glob *g; - - // remove margin - - right_margin_indent = 0; - - if (! page_contents->words.is_empty()) { - - // firstly check the words to determine the right margin - - page_contents->words.start_from_head(); - do { - w = page_contents->words.get_data(); - if ((w->maxh >= 0) && (w->maxh > right_margin_indent)) { - right_margin_indent = w->maxh; -#if 0 - if (right_margin_indent == 758) stop(); -#endif - } - page_contents->words.move_right(); - } while (! page_contents->words.is_equal_to_head()); - - /* - * only examine graphics if no words present - */ - if (! page_contents->lines.is_empty()) { - // now check for diagrams for right margin - page_contents->lines.start_from_head(); - do { - g = page_contents->lines.get_data(); - if ((g->maxh >= 0) && (g->maxh > right_margin_indent)) { - right_margin_indent = g->maxh; -#if 0 - if (right_margin_indent == 950) stop(); -#endif - } - page_contents->lines.move_right(); - } while (! page_contents->lines.is_equal_to_head()); - } - - - /* - * now we know the right margin lets do the same to find left margin - */ - - if (header_indent == -1) { - header_indent = right_margin_indent; - } - left_margin_indent = right_margin_indent; - - if (! page_contents->words.is_empty()) { - do { - w = page_contents->words.get_data(); - if ((w->minh >= 0) && (w->minh < left_margin_indent)) { - if (! is_a_header(w) && (! w->is_raw_command)) { - left_margin_indent = w->minh; - } - } - page_contents->words.move_right(); - } while (! page_contents->words.is_equal_to_head()); - } - - /* - * only examine graphic for margins if text yields nothing - */ - - if (! page_contents->lines.is_empty()) { - // now check for diagrams - page_contents->lines.start_from_head(); - do { - g = page_contents->lines.get_data(); - if ((g->minh >= 0) && (g->minh < left_margin_indent)) { - left_margin_indent = g->minh; - } - page_contents->lines.move_right(); - } while (! page_contents->lines.is_equal_to_head()); - } - } -} - -/* - * calculate_region - runs through the graphics globs and text globs - * and ensures that all graphic routines - * are defined by the region lists. - * This then allows us to easily - * determine the range of vertical and - * horizontal boundaries for pictures, - * tbl's and eqn's. - * - */ - -void page::calculate_region (void) -{ - graphic_glob *g; - - if (! lines.is_empty()) { - lines.start_from_head(); - do { - g = lines.get_data(); - if (! is_in_region(g)) { - if (! can_grow_region(g)) { - make_new_region(g); - } - } - lines.move_right(); - } while (! lines.is_equal_to_head()); - } -} - -/* - * remove_redundant_regions - runs through the regions and ensures that - * all are needed. This is required as - * a picture may be empty, or EQ EN pair - * maybe empty. - */ - -void html_printer::remove_redundant_regions (void) -{ - region_glob *r; - - // firstly run through the region making sure that all are needed - // ie all contain a line or word - if (! page_contents->regions.is_empty()) { - page_contents->regions.start_from_tail(); - do { - r = page_contents->regions.get_data(); - calculate_region_margins(r); - if (page_contents->has_line(r) || page_contents->has_word(r)) { - page_contents->regions.move_right(); - } else { - page_contents->regions.sub_move_right(); - } - } while ((! page_contents->regions.is_empty()) && - (! page_contents->regions.is_equal_to_tail())); - } -} - -void html_printer::display_regions (void) -{ - if (debug_table_on) { - region_glob *r; - - fprintf(stderr, "==========s t a r t===========\n"); - if (! page_contents->regions.is_empty()) { - page_contents->regions.start_from_head(); - do { - r = page_contents->regions.get_data(); - fprintf(stderr, "region minv %d maxv %d\n", r->minv, r->maxv); - page_contents->regions.move_right(); - } while (! page_contents->regions.is_equal_to_head()); - } - fprintf(stderr, "============e n d=============\n"); - fflush(stderr); - } -} - -/* - * remove_duplicate_regions - runs through the regions and ensures that - * no duplicates exist. - */ - -void html_printer::remove_duplicate_regions (void) -{ - region_glob *r; - region_glob *l=0; - - if (! page_contents->regions.is_empty()) { - page_contents->regions.start_from_head(); - l = page_contents->regions.get_data(); - page_contents->regions.move_right(); - r = page_contents->regions.get_data(); - if (l != r) { - do { - r = page_contents->regions.get_data(); - // we have a legit region so we check for an intersection - if (is_intersection(r->minv, r->minv, l->minv, l->maxv) && - is_intersection(r->minh, r->maxh, l->minh, l->maxh)) { - l->minv = min(r->minv, l->minv); - l->maxv = max(r->maxv, l->maxv); - l->minh = min(r->minh, l->minh); - l->maxh = max(r->maxh, l->maxh); - calculate_region_margins(l); - page_contents->regions.sub_move_right(); - } else { - l = r; - page_contents->regions.move_right(); - } - } while ((! page_contents->regions.is_empty()) && - (! page_contents->regions.is_equal_to_head())); - } - } -} - -int page::has_line (region_glob *r) -{ - graphic_glob *g; - - if (! lines.is_empty()) { - lines.start_from_head(); - do { - g = lines.get_data(); - if (is_subsection(g->minv, g->maxv, r->minv, r->maxv) && - is_subsection(g->minh, g->maxh, r->minh, r->maxh)) { - return( TRUE ); - } - lines.move_right(); - } while (! lines.is_equal_to_head()); - } - return( FALSE ); -} - - -int page::has_word (region_glob *r) -{ - text_glob *g; - - if (! words.is_empty()) { - words.start_from_head(); - do { - g = words.get_data(); - if (is_subsection(g->minv, g->maxv, r->minv, r->maxv) && - is_subsection(g->minh, g->maxh, r->minh, r->maxh)) { - return( TRUE ); - } - words.move_right(); - } while (! words.is_equal_to_head()); - } - return( FALSE ); -} - - -void html_printer::calculate_region_margins (region_glob *r) -{ - text_glob *w; - graphic_glob *g; - - r->minh = right_margin_indent; - r->maxh = left_margin_indent; - - if (! page_contents->lines.is_empty()) { - page_contents->lines.start_from_head(); - do { - g = page_contents->lines.get_data(); - if (is_subsection(g->minv, g->maxv, r->minv, r->maxv)) { - r->minh = min(r->minh, g->minh); - r->maxh = max(r->maxh, g->maxh); - } - page_contents->lines.move_right(); - } while (! page_contents->lines.is_equal_to_head()); - } - if (! page_contents->words.is_empty()) { - page_contents->words.start_from_head(); - do { - w = page_contents->words.get_data(); - if (is_subsection(w->minv, w->maxv, r->minv, r->maxv)) { - r->minh = min(r->minh, w->minh); - r->maxh = max(r->maxh, w->maxh); - } - page_contents->words.move_right(); - } while (! page_contents->words.is_equal_to_head()); - } -} - - -int page::is_in_region (graphic_glob *g) -{ - region_glob *r; - - if (! regions.is_empty()) { - regions.start_from_head(); - do { - r = regions.get_data(); - if (is_subsection(g->minv, g->maxv, r->minv, r->maxv) && - is_subsection(g->minh, g->maxh, r->minh, r->maxh)) { - return( TRUE ); - } - regions.move_right(); - } while (! regions.is_equal_to_head()); - } - return( FALSE ); -} - - -/* - * no_raw_commands - returns TRUE if no html raw commands exist between - * minv and maxv. - */ - -int page::no_raw_commands (int minv, int maxv) -{ - text_glob *g; - - if (! words.is_empty()) { - words.start_from_head(); - do { - g = words.get_data(); - if ((g->is_raw_command) && (g->is_html_command) && - (is_intersection(g->minv, g->maxv, minv, maxv))) { - return( FALSE ); - } - words.move_right(); - } while (! words.is_equal_to_head()); - } - return( TRUE ); -} - -/* - * can_grow_region - returns TRUE if a region exists which can be extended - * to include graphic_glob *g. The region is extended. - */ - -int page::can_grow_region (graphic_glob *g) -{ - region_glob *r; - int quarter_inch=font::res/4; - - if (! regions.is_empty()) { - regions.start_from_head(); - do { - r = regions.get_data(); - // must prevent grohtml from growing a region through a html raw command - if (is_intersection(g->minv, g->maxv, r->minv, r->maxv+quarter_inch) && - (no_raw_commands(r->minv, r->maxv+quarter_inch))) { -#if defined(DEBUGGING) - stop(); - printf("r minh=%d minv=%d maxh=%d maxv=%d\n", - r->minh, r->minv, r->maxh, r->maxv); - printf("g minh=%d minv=%d maxh=%d maxv=%d\n", - g->minh, g->minv, g->maxh, g->maxv); -#endif - r->minv = min(r->minv, g->minv); - r->maxv = max(r->maxv, g->maxv); - r->minh = min(r->minh, g->minh); - r->maxh = max(r->maxh, g->maxh); -#if defined(DEBUGGING) - printf(" r minh=%d minv=%d maxh=%d maxv=%d\n", - r->minh, r->minv, r->maxh, r->maxv); -#endif - return( TRUE ); - } - regions.move_right(); - } while (! regions.is_equal_to_head()); - } - return( FALSE ); -} - - -/* - * make_new_region - creates a new region to contain, g. - */ - -void page::make_new_region (graphic_glob *g) -{ - region_glob *r=new region_glob; - - r->minv = g->minv; - r->maxv = g->maxv; - r->minh = g->minh; - r->maxv = g->maxv; - regions.add(r); -} - - -void html_printer::dump_page(void) -{ - text_glob *g; - - printf("\n\ndebugging start\n"); - page_contents->words.start_from_head(); - do { - g = page_contents->words.get_data(); - printf("%s ", g->text_string); - page_contents->words.move_right(); - } while (! page_contents->words.is_equal_to_head()); - printf("\ndebugging end\n\n"); -} - - -/* - * traverse_page_regions - runs through the regions in current_page - * and generate html for text, and troff output - * for all graphics. - */ - -void html_printer::traverse_page_regions (void) -{ - region_glob *r; - - start_region_vpos = 0; - start_region_hpos = 0; - end_region_vpos = -1; - end_region_hpos = -1; - - if (! page_contents->regions.is_empty()) { - page_contents->regions.start_from_head(); - do { - r = page_contents->regions.get_data(); - if (r->minv > 0) { - end_region_vpos = r->minv-1; - } else { - end_region_vpos = 0; - } - end_region_hpos = -1; - display_globs(TRUE); - calculate_region_margins(r); - start_region_vpos = end_region_vpos; - end_region_vpos = r->maxv; - start_region_hpos = r->minh; - end_region_hpos = r->maxh; - display_globs(FALSE); - start_region_vpos = end_region_vpos+1; - start_region_hpos = 0; - page_contents->regions.move_right(); - } while (! page_contents->regions.is_equal_to_head()); - start_region_vpos = end_region_vpos+1; - start_region_hpos = 0; - end_region_vpos = -1; - end_region_hpos = -1; - } - display_globs(TRUE); -} - -int html_printer::is_within_region (text_glob *t) -{ - int he, ve, hs; - - if (start_region_hpos == -1) { - hs = t->minh; - } else { - hs = start_region_hpos; - } - if (end_region_vpos == -1) { - ve = t->maxv; - } else { - ve = end_region_vpos; - } - if (end_region_hpos == -1) { - he = t->maxh; - } else { - he = end_region_hpos; - } - return( is_subsection(t->minv, t->maxv, start_region_vpos, ve) && - is_subsection(t->minh, t->maxh, hs, he) ); -} - -int html_printer::is_within_region (graphic_glob *g) -{ - int he, ve, hs; - - if (start_region_hpos == -1) { - hs = g->minh; - } else { - hs = start_region_hpos; - } - if (end_region_vpos == -1) { - ve = g->maxv; - } else { - ve = end_region_vpos; - } - if (end_region_hpos == -1) { - he = g->maxh; - } else { - he = end_region_hpos; - } - return( is_subsection(g->minv, g->maxv, start_region_vpos, ve) && - is_subsection(g->minh, g->maxh, hs, he) ); -} - -int html_printer::is_less (graphic_glob *g, text_glob *t) -{ - return( (g->minv < t->minv) || ((g->minv == t->minv) && (g->minh < t->minh)) ); -} - -void html_printer::convert_to_image (char *troff_src, char *image_name) -{ - char buffer[MAX_STRING_LENGTH*2 + 200]; - char *ps_src = mktemp(xtmptemplate("-ps-")); - - sprintf(buffer, "grops%s %s > %s", EXE_EXT, troff_src, ps_src); - if (debug_on) { - fprintf(stderr, "%s\n", buffer); - } - int status = system(buffer); - if (status == -1) { - fprintf(stderr, "\"%s\" failed (no grops on PATH?)\n", buffer); - return; - } - else if (status) { - fprintf(stderr, "\"%s\" returned status %d\n", buffer, status); - } - - if (image_type == gif) { - sprintf(buffer, - "echo showpage | gs%s -q -dSAFER -sDEVICE=ppmraw -r%d -g%dx%d -sOutputFile=- %s - | ppmquant%s 256 | ppmtogif%s > %s.gif", - EXE_EXT, image_res, - (end_region_hpos-start_region_hpos)*image_res/font::res+IMAGE_BOARDER_PIXELS, - (end_region_vpos-start_region_vpos)*image_res/font::res+IMAGE_BOARDER_PIXELS, - ps_src, EXE_EXT, EXE_EXT, image_name); - } else { - sprintf(buffer, - "echo showpage | gs%s -q -dSAFER -sDEVICE=%s -r%d -g%dx%d -sOutputFile=- %s - > %s.png", - EXE_EXT, image_device, - image_res, - (end_region_hpos-start_region_hpos)*image_res/font::res+IMAGE_BOARDER_PIXELS, - (end_region_vpos-start_region_vpos)*image_res/font::res+IMAGE_BOARDER_PIXELS, - ps_src, image_name); -#if 0 - sprintf(buffer, - "echo showpage | gs -q -dSAFER -sDEVICE=ppmraw -r%d -g%dx%d -sOutputFile=- %s.ps - > %s.pnm ; pnmtopng -transparent white %s.pnm > %s.png \n", - /* image_device, */ - image_res, - (end_region_hpos-start_region_hpos)*image_res/font::res+IMAGE_BOARDER_PIXELS, - (end_region_vpos-start_region_vpos)*image_res/font::res+IMAGE_BOARDER_PIXELS, - name, name, name, image_name); -#endif - } - if (debug_on) { - fprintf(stderr, "%s\n", buffer); - } - // Redirect standard error to the null device. This is more - // portable than using "2> /dev/null" inside the commands above, - // since it doesn't require a Unixy shell. - int save_stderr = dup(2); - if (save_stderr > 2) { - int fdnull = open(NULL_DEV, O_WRONLY|O_BINARY, 0666); - if (fdnull > 2) - dup2(fdnull, 2); - if (fdnull >= 0) - close(fdnull); - } - status = system(buffer); - dup2(save_stderr, 2); - if (status == -1) { - fprintf(stderr, - "Conversion to image failed (no gs/ppmquant/ppmtogif on PATH?)\n"); - } - else if (status) { - fprintf(stderr, - "Conversion to image returned status %d\n", status); - } - unlink(ps_src); - unlink(troff_src); -} - -void html_printer::prologue (void) -{ - troff.put_string("x T ps\nx res "); - troff.put_number(postscript_res); - troff.put_string(" 1 1\nx init\np1\n"); -} - -void html_printer::display_globs (int is_to_html) -{ - text_glob *t=0; - graphic_glob *g=0; - FILE *f=0; - char *troff_src; - int something=FALSE; - int is_center=FALSE; - - end_paragraph(); - - if (! is_to_html) { - is_center = html_position_region(); - make_new_image_name(); - f = xtmpfile(&troff_src, "-troff-", FALSE); - troff.set_file(f); - prologue(); - output_style.f = 0; - } - if (! page_contents->words.is_empty()) { - page_contents->words.start_from_head(); - t = page_contents->words.get_data(); - } - - if (! page_contents->lines.is_empty()) { - page_contents->lines.start_from_head(); - g = page_contents->lines.get_data(); - } - - do { -#if 0 - if ((t != 0) && (strcmp(t->text_string, "(1.a)") == 0)) { - stop(); - } -#endif - if ((t == 0) && (g != 0)) { - if (is_within_region(g)) { - something = TRUE; - display_line(g, is_to_html); - } - if (page_contents->lines.is_empty() || page_contents->lines.is_equal_to_tail()) { - g = 0; - } else { - g = page_contents->lines.move_right_get_data(); - } - } else if ((g == 0) && (t != 0)) { - if (is_within_region(t)) { - display_word(t, is_to_html); - something = TRUE; - } - if (page_contents->words.is_empty() || page_contents->words.is_equal_to_tail()) { - t = 0; - } else { - t = page_contents->words.move_right_get_data(); - } - } else { - if ((g == 0) || (t == 0)) { - // hmm nothing to print out... - } else if (is_less(g, t)) { - if (is_within_region(g)) { - display_line(g, is_to_html); - something = TRUE; - } - if (page_contents->lines.is_empty() || page_contents->lines.is_equal_to_tail()) { - g = 0; - } else { - g = page_contents->lines.move_right_get_data(); - } - } else { - if (is_within_region(t)) { - display_word(t, is_to_html); - something = TRUE; - } - if (page_contents->words.is_empty() || page_contents->words.is_equal_to_tail()) { - t = 0; - } else { - t = page_contents->words.move_right_get_data(); - } - } - } - } while ((t != 0) || (g != 0)); - - if ((! is_to_html) && (f != 0)) { - fclose(troff.get_file()); - if (something) { - convert_to_image(troff_src, image_name); - - if (is_center) { - end_paragraph(); - begin_paragraph(center_alignment); - force_begin_paragraph(); - } - html.put_string("<img src=\""); - html.put_string(image_name); - if (image_type == gif) { - html.put_string(".gif\""); - } else { - html.put_string(".png\""); - } - html.put_string(">\n"); - html_newline(); - if (is_center) { - end_paragraph(); - } - - output_vpos = end_region_vpos; - output_hpos = 0; - need_one_newline = FALSE; - output_style.f = 0; - end_paragraph(); - } - } -} - -void html_printer::flush_page (void) -{ - calculate_margin(); - output_vpos = -1; - output_hpos = get_left(); - supress_sub_sup = TRUE; -#if 0 - dump_page(); -#endif - html.begin_comment("left margin: ").comment_arg(i_to_a(left_margin_indent)).end_comment();; - html.begin_comment("right margin: ").comment_arg(i_to_a(right_margin_indent)).end_comment();; - remove_redundant_regions(); - page_contents->calculate_region(); - remove_duplicate_regions(); - find_title(); - supress_sub_sup = TRUE; - traverse_page_regions(); - terminate_current_font(); - if (need_one_newline) { - html_newline(); - } - end_paragraph(); - - // move onto a new page - delete page_contents; - page_contents = new page; -} - -static int convertSizeToHTML (int size) -{ - if (size < 6) { - return( 0 ); - } else if (size < 8) { - return( 1 ); - } else if (size < 10) { - return( 2 ); - } else if (size < 12) { - return( 3 ); - } else if (size < 14) { - return( 4 ); - } else if (size < 16) { - return( 5 ); - } else if (size < 18) { - return( 6 ); - } else { - return( 7 ); - } -} - - -void html_printer::write_html_font_face (const char *fontname, const char *left, const char *right) -{ - switch (fontname[0]) { - - case 'C': html.put_string(left) ; html.put_string("tt"); html.put_string(right); - break; - case 'H': break; - case 'T': break; - default: break; - } -} - - -void html_printer::write_html_font_type (const char *fontname, const char *left, const char *right) -{ - if (strcmp(&fontname[1], "B") == 0) { - html.put_string(left) ; html.put_string("B"); html.put_string(right); - } else if (strcmp(&fontname[1], "I") == 0) { - html.put_string(left) ; html.put_string("I"); html.put_string(right); - } else if (strcmp(&fontname[1], "BI") == 0) { - html.put_string(left) ; html.put_string("EM"); html.put_string(right); - } -} - - -void html_printer::html_change_font (text_glob *g, const char *fontname, int size) -{ - char buffer[1024]; - - if (output_style.f != 0) { - const char *oldfontname = output_style.f->get_name(); - - // firstly terminate the current font face and type - if ((oldfontname != 0) && (oldfontname != fontname)) { - write_html_font_face(oldfontname, "</", ">"); - write_html_font_type(oldfontname, "</", ">"); - } - } - - if ((output_style.point_size != size) && (output_style.point_size != 0)) { - // shutdown the previous font size - html.put_string("</font>"); - } - - if ((output_style.point_size != size) && (size != 0)) { - // now emit the size if it has changed - sprintf(buffer, "<font size=%d>", convertSizeToHTML(size)); - html.put_string(buffer); - output_style.point_size = size; // and remember the size - } - output_style.f = 0; // no style at present - output_style.point_size = size; // remember current font size - - if (fontname != 0) { - if (! g->is_raw_command) { - // now emit the new font - write_html_font_face(fontname, "<", ">"); - - // now emit the new font type - write_html_font_type(fontname, "<", ">"); - - output_style = g->text_style; // remember style for next time - } - } -} - - -void html_printer::change_font (text_glob *g, int is_to_html) -{ - if (is_to_html) { - if (output_style != g->text_style) { - const char *fontname=0; - int size=0; - - if (g->text_style.f != 0) { - fontname = g->text_style.f->get_name(); - size = (font::res/(72*font::sizescale))*g->text_style.point_size; - } - html_change_font(g, fontname, size); - } - } else { - // is to troff - if (output_style != g->text_style) { - if (g->text_style.f != 0) { - const char *fontname = g->text_style.f->get_name(); - int size = (font::res/(72*font::sizescale))*g->text_style.point_size; - - if (fontname == 0) { - fatal("no internalname specified for font"); - } - - troff_change_font(fontname, size, g->text_style.font_no); - output_style = g->text_style; // remember style for next time - } - } - } -} - -/* - * is_bold - returns TRUE if the text inside, g, is using a bold face. - * It returns FALSE is g contains a raw html command, even if this uses - * a bold font. - */ - -int html_printer::is_bold (text_glob *g) -{ - if (g->text_style.f == 0) { - // unknown font - return( FALSE ); - } else if (g->is_raw_command) { - return( FALSE ); - } else { - const char *fontname = g->text_style.f->get_name(); - - if (strlen(fontname) >= 2) { - return( fontname[1] == 'B' ); - } else { - return( FALSE ); - } - } -} - -void html_printer::terminate_current_font (void) -{ - text_glob g; - - // we create a dummy glob just so we can tell html_change_font not to start up - // a new font - g.is_raw_command = TRUE; - html_change_font(&g, 0, 0); -} - -void html_printer::write_header (text_glob *g) -{ - if (strlen(header.header_buffer) > 0) { - if (header.header_level > 7) { - header.header_level = 7; - } - - if (cutoff_heading+2 > header.header_level) { - // firstly we must terminate any font and type faces - terminate_current_font(); - end_paragraph(); - - // secondly we generate a tag - html.put_string("<a name=\""); - html.put_string(header.header_buffer); - html.put_string("\"></a>"); - // now we save the header so we can issue a list of link - style st; - - header.no_of_headings++; - - text_glob *h=new text_glob(&st, - header.headings.add_string(header.header_buffer, strlen(header.header_buffer)), - strlen(header.header_buffer), - header.no_of_headings, header.header_level, - header.no_of_headings, header.header_level, - FALSE, FALSE); - header.headers.add(h); // and add this header to the header list - } else { - terminate_current_font(); - end_paragraph(); - } - - // we adjust the margin if necessary - - if (g->minh < left_margin_indent) { - header_indent = g->minh; - } - - // 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(">"); - - need_one_newline = FALSE; - begin_paragraph(left_alignment); - header.written_header = TRUE; - } -} - -/* - * translate_str_to_html - translates a string, str, into html representation. - * len indicates the string length. - */ - -void translate_str_to_html (font *f, char *str, int len) -{ - char buf[MAX_STRING_LENGTH]; - - str_translate_to_html(f, buf, MAX_STRING_LENGTH, str, len, TRUE); - strncpy(str, buf, max(len, strlen(buf)+1)); -} - -/* - * write_headings - emits a list of links for the headings in this document - */ - -void header_desc::write_headings (FILE *f) -{ - text_glob *g; - - if (! headers.is_empty()) { - headers.start_from_head(); - do { - g = headers.get_data(); - fprintf(f, "<a href=\"#%s\">%s</a><br>\n", g->text_string, g->text_string); - headers.move_right(); - } while (! headers.is_equal_to_head()); - } -} - -void html_printer::determine_header_level (void) -{ - int i; - int l=strlen(header.header_buffer); - int stops=0; - - for (i=0; ((i<l) && ((header.header_buffer[i] == '.') || is_digit(header.header_buffer[i]))) ; i++) { - if (header.header_buffer[i] == '.') { - stops++; - } - } - if (stops > 0) { - header.header_level = stops; - } -} - - -void html_printer::build_header (text_glob *g) -{ - text_glob *l; - int current_vpos; - char buf[MAX_STRING_LENGTH]; - - strcpy(header.header_buffer, ""); - do { - l = g; - current_vpos = g->minv; - str_translate_to_html(g->text_style.f, buf, MAX_STRING_LENGTH, g->text_string, g->text_length, TRUE); - strcat(header.header_buffer, (char *)buf); - page_contents->words.move_right(); - g = page_contents->words.get_data(); - if (g->minv == current_vpos) { - strcat(header.header_buffer, " "); - } - } while ((! page_contents->words.is_equal_to_head()) && - ((g->minv == current_vpos) || (l->maxh == right_margin_indent))); - - determine_header_level(); - // finally set the output to neutral for after the header - - g = page_contents->words.get_data(); - output_vpos = g->minv; // set output_vpos to the next line since - output_hpos = left_margin_indent; // html header forces a newline anyway - page_contents->words.move_left(); // so that next time we use old g - - need_one_newline = FALSE; -} - - -/* - * is_whole_line_bold - returns TRUE if the whole line is bold. - */ - -int html_printer::is_whole_line_bold (text_glob *g) -{ - text_glob *n=g; - int current_vpos=g->minv; - - do { - if (is_bold(n)) { - page_contents->words.move_right(); - n = page_contents->words.get_data(); - } else { - while (page_contents->words.get_data() != g) { - page_contents->words.move_left(); - } - return( FALSE ); - } - } while ((! page_contents->words.is_equal_to_head()) && (is_on_same_line(n, current_vpos))); - // was (n->minv == current_vpos) - while (page_contents->words.get_data() != g) { - page_contents->words.move_left(); - } - return( TRUE ); -} - - -/* - * is_a_header - returns TRUE if the whole sequence of contineous lines are bold. - * It checks to see whether a line is likely to be contineous and - * then checks that all words are bold. - */ - -int html_printer::is_a_header (text_glob *g) -{ - text_glob *l; - text_glob *n=g; - int current_vpos; - - do { - l = n; - current_vpos = n->minv; - if (is_bold(n)) { - page_contents->words.move_right(); - n = page_contents->words.get_data(); - } else { - while (page_contents->words.get_data() != g) { - page_contents->words.move_left(); - } - return( FALSE ); - } - } while ((! page_contents->words.is_equal_to_head()) && - ((n->minv == current_vpos) || (l->maxh == right_margin_indent))); - while (page_contents->words.get_data() != g) { - page_contents->words.move_left(); - } - return( TRUE ); -} - - -int html_printer::processed_header (text_glob *g) -{ - if ((guess_on) && (g->minh <= left_margin_indent) && (! using_table_for_indent()) && - (is_a_header(g))) { - build_header(g); - write_header(g); - return( TRUE ); - } else { - return( FALSE ); - } -} - -int is_punctuation (char *s, int length) -{ - return( (length == 1) && - ((s[0] == '(') || (s[0] == ')') || (s[0] == '!') || (s[0] == '.') || (s[0] == '[') || - (s[0] == ']') || (s[0] == '?') || (s[0] == ',') || (s[0] == ';') || (s[0] == ':') || - (s[0] == '@') || (s[0] == '#') || (s[0] == '$') || (s[0] == '%') || (s[0] == '^') || - (s[0] == '&') || (s[0] == '*') || (s[0] == '+') || (s[0] == '-') || (s[0] == '=') || - (s[0] == '{') || (s[0] == '}') || (s[0] == '|') || (s[0] == '\"') || (s[0] == '\'')) - ); -} - -/* - * move_horizontal - moves right into the position, g->minh. - */ - -void html_printer::move_horizontal (text_glob *g, int left_margin) -{ - if (g->text_style.f != 0) { - int w = g->text_style.f->get_space_width(g->text_style.point_size); - - if (w == 0) { - fatal("space width is zero"); - } - if ((output_hpos == left_margin) && (g->minh > output_hpos)) { - make_html_indent(g->minh-output_hpos); - } else { - emit_space(g, FALSE); - } - output_hpos = g->maxh; - output_vpos = g->minv; - - change_font(g, TRUE); - } -} - -/* - * looks_like_subscript - returns TRUE if, g, looks like a subscript. - */ - -int html_printer::looks_like_subscript (text_glob *g) -{ - int r = font::res; - int height = output_style.point_size*r/72; - - /* was return( ((output_vpos < g->minv) && (output_style.point_size != 0) && - * (output_style.point_size > g->text_style.point_size)) ); - */ - - return( (output_style.point_size != 0) && (! supress_sub_sup) && (output_vpos+height < g->maxv) ); -} - -/* - * looks_like_superscript - returns TRUE if, g, looks like a superscript. - */ - -int html_printer::looks_like_superscript (text_glob *g) -{ - int r = font::res; - int height = output_style.point_size*r/72; - -/* was - * return(((output_vpos > g->minv) && (output_style.point_size != 0) && - * (output_style.point_size > g->text_style.point_size))); - */ - - return( (output_style.point_size != 0) && (! supress_sub_sup) && (output_vpos+height > g->maxv) ); -} - -/* - * looks_like_larger_font - returns TRUE if, g, can be treated as a larger font. - * g needs to be on the same line - */ - -int html_printer::looks_like_larger_font (text_glob *g) -{ - int r = font::res; - int height = output_style.point_size*r/72; - - return( (output_vpos+height == g->maxv) && (output_style.point_size != 0) && - (convertSizeToHTML(g->text_style.point_size)+1 == convertSizeToHTML(output_style.point_size)) ); -} - -/* - * looks_like_smaller_font - returns TRUE if, g, can be treated as a smaller font. - * g needs to be on the same line - */ - -int html_printer::looks_like_smaller_font (text_glob *g) -{ - int r = font::res; - int height = output_style.point_size*r/72; - - return( (output_vpos+height == g->maxv) && (output_style.point_size != 0) && - (convertSizeToHTML(g->text_style.point_size) == convertSizeToHTML(output_style.point_size)+1) ); -} - -/* - * pretend_is_on_same_line - returns TRUE if we think, g, is on the same line as the previous glob. - * Note that it believes a single word spanning the left..right as being - * on a different line. - */ - -int html_printer::pretend_is_on_same_line (text_glob *g, int left_margin, int right_margin) -{ - return( auto_on && (right_margin == output_hpos) && (left_margin == g->minh) && - (right_margin != g->maxh) && ((! is_whole_line_bold(g)) || (g->text_style.f == output_style.f)) && - (! (using_table_for_indent()) || (indentation.wrap_margin)) ); -} - -int html_printer::is_on_same_line (text_glob *g, int vpos) -{ -#if 0 - if (g->is_html_command) { - stop(); - } -#endif - return( - (vpos >= 0) && - (is_intersection(vpos, vpos+g->text_style.point_size*font::res/72-1, g->minv, g->maxv)) - ); -} - - -/* - * make_html_indent - creates a relative indentation. - */ - -void html_printer::make_html_indent (int indent) -{ - if ((indent > 0) && ((right_margin_indent-get_left()) > 0) && - ((indent*100)/(right_margin_indent-get_left()))) { - html.put_string("<span style=\" text-indent: "); - html.put_number((indent*100)/(right_margin_indent-get_left())); - html.put_string("%;\"></span>"); - } -} - -/* - * using_table_for_indent - returns TRUE if we currently using a table for indentation - * purposes. - */ - -int html_printer::using_table_for_indent (void) -{ - return( indentation.no_of_columns != 0 ); -} - -/* - * calculate_min_gap - returns the minimum gap by which we deduce columns. - * This is a rough heuristic. - */ - -int html_printer::calculate_min_gap (text_glob *g) -{ - text_glob *t = g; - - while ((t->is_raw_command) && (! page_contents->words.is_equal_to_tail()) && - ((t->minv < end_region_vpos) || (end_region_vpos < 0))) { - page_contents->words.move_right(); - t=page_contents->words.get_data(); - } - rewind_text_to(g); - if (t->is_raw_command) { - return( font::res * 10 ); // impossibly large gap width - } else { - return( t->text_style.f->get_space_width(t->text_style.point_size)*GAP_SPACES ); - } -} - -/* - * collect_columns - place html text in a column and return the vertical limit reached. - */ - -int html_printer::collect_columns (struct text_defn *next_words, - struct text_defn *next_cols, - struct text_defn *last_words, - struct text_defn *last_cols, - int max_words) -{ - text_glob *start = page_contents->words.get_data(); - text_glob *t = start; - int upper_limit = 0; - - /* - * initialize cols and words - */ - next_words[0].left = 0; - next_words[0].right = 0; - next_cols [0].left = 0; - next_cols [0].right = 0; - - /* - * if we have not reached the end collect the words on the current line - */ - if (start != 0) { - int graphic_limit = end_region_vpos; - - if (is_whole_line_bold(t) && (t->minh <= left_margin_indent) && (guess_on)) { - /* - * found header therefore terminate indentation table. - * Return a negative number so we know a header has - * stopped the column - */ - upper_limit = -t->minv; - } else { - int i =0; // is the index into next_cols - int j =0; // is the column index for last_cols - int k =0; // is the index into next_words - int l =0; // is the index into next_words - int prevh =0; - int mingap =calculate_min_gap(start); - - /* - * while words on the same line record them and any significant gaps - */ - while ((t != 0) && (is_on_same_line(t, start->minv) && (i<max_words)) && - ((graphic_limit == -1) || (graphic_limit > t->minv))) { - - /* - * now find column index from the last line which corresponds to, t. - */ - j = find_column_index_in_line(t, last_cols); - - /* - * now find word index from the last line which corresponds to, t. - */ - l = find_column_index_in_line(t, last_words); - - /* - * Note t->minh might equal t->maxh when we are passing a special device character via \X - * we currently ignore this when considering tables - * - * if we have found a significant gap then record it - */ - if (((t->minh - prevh >= mingap) || - ((last_cols != 0) && (last_cols [j].right != 0) && (t->minh == last_cols [j].left))) && - (t->minh != t->maxh)) { - next_cols[i].left = t->minh; - next_cols[i].right = t->maxh; - i++; - /* - * terminate the array - */ - if (i<max_words) { - next_cols[i].left = 0; - next_cols[i].right = 0; - } - } else if (i>0) { - /* - * move previous right hand column to align with, t. - */ - - if (t->minh > next_cols[i-1].left) { - /* - * a simple precaution in case we get globs which are technically on the same line - * (sadly this does occur sometimes - maybe we should be stricter with is_on_same_line) - * --fixme-- - */ - next_cols[i-1].right = max(next_cols[i-1].right, t->maxh); - } - } - /* - * remember to record the individual words - */ - next_words[k].left = t->minh; - next_words[k].right = t->maxh; - k++; - - /* - * and record the vertical upper limit - */ - upper_limit = max(t->minv, upper_limit); - - /* - * and update prevh - used to detect a when a different line is seen - */ - prevh = t->maxh; - - /* - * get next word into, t, which equals 0, if no word is found - */ - page_contents->words.move_right(); - t = page_contents->words.get_data(); - if (page_contents->words.is_equal_to_head()) { - t = 0; - } - } - - /* - * and terminate the next_words array - */ - - if (k<max_words) { - next_words[k].left = 0; - next_words[k].right = 0; - } - - /* - * consistency check, next_cols, after removing redundant colums. - */ - - remove_redundant_columns(next_cols); - -#if 0 - for (k=0; k<count_columns(next_cols); k++) { - if (next_cols[k].left > next_cols[k].right) { - fprintf(stderr, "left > right\n"); fflush(stderr); - stop(); - fatal("next_cols has messed up columns"); - } - if ((k>0) && (k+1<count_columns(next_cols)) && (next_cols[k].right > next_cols[k+1].left)) { - fprintf(stderr, "next_cols[k].right > next_cols[k+1].left\n"); fflush(stderr); - stop(); - fatal("next_cols has messed up columns"); - } - } -#endif - } - } - return( upper_limit ); -} - -/* - * conflict_with_words - returns TRUE if a word sequence crosses a column. - */ - -int html_printer::conflict_with_words (struct text_defn *column_guess, struct text_defn *words) -{ - int i=0; - int j; - - while ((column_guess[i].right != 0) && (i<MAX_WORDS_PER_LINE)) { - j=0; - while ((words[j].right != 0) && (j<MAX_WORDS_PER_LINE)) { - if ((words[j].left <= column_guess[i].right) && (i+1<MAX_WORDS_PER_LINE) && - (column_guess[i+1].right != 0) && (words[j].right >= column_guess[i+1].left)) { - if (debug_table_on) { - fprintf(stderr, "is a conflict with words\n"); - fflush(stderr); - } - return( TRUE ); - } - j++; - } - i++; - } - if (debug_table_on) { - fprintf(stderr, "is NOT a conflict with words\n"); - fflush(stderr); - } - return( FALSE ); -} - -/* - * combine_line - combines dest and src. - */ - -void html_printer::combine_line (struct text_defn *dest, struct text_defn *src) -{ - int i; - - for (i=0; (i<MAX_WORDS_PER_LINE) && (src[i].right != 0); i++) { - include_into_list(dest, &src[i]); - } - remove_redundant_columns(dest); -} - -/* - * remove_entry_in_line - removes an entry, j, in, line. - */ - -void html_printer::remove_entry_in_line (struct text_defn *line, int j) -{ - while (line[j].right != 0) { - line[j].left = line[j+1].left; - line[j].right = line[j+1].right; - j++; - } -} - -/* - * remove_redundant_columns - searches through the array columns and removes any redundant entries. - */ - -void html_printer::remove_redundant_columns (struct text_defn *line) -{ - int i=0; - int j=0; - - while (line[i].right != 0) { - if ((i<MAX_WORDS_PER_LINE) && (line[i+1].right != 0)) { - j = 0; - while ((j<MAX_WORDS_PER_LINE) && (line[j].right != 0)) { - if ((j != i) && (is_intersection(line[i].left, line[i].right, line[j].left, line[j].right))) { - line[i].left = min(line[i].left , line[j].left); - line[i].right = max(line[i].right, line[j].right); - remove_entry_in_line(line, j); - } else { - j++; - } - } - } - i++; - } -} - -/* - * include_into_list - performs an order set inclusion - */ - -void html_printer::include_into_list (struct text_defn *line, struct text_defn *item) -{ - int i=0; - - while ((i<MAX_WORDS_PER_LINE) && (line[i].right != 0) && (line[i].left<item->left)) { - i++; - } - - if (line[i].right == 0) { - // add to the end - if (i<MAX_WORDS_PER_LINE) { - if ((i>0) && (line[i-1].left > item->left)) { - fatal("insertion error"); - } - line[i].left = item->left; - line[i].right = item->right; - i++; - line[i].left = 0; - line[i].right = 0; - } - } else { - if (line[i].left == item->left) { - line[i].right = max(item->right, line[i].right); - } else { - // insert - int left = item->left; - int right = item->right; - int l = line[i].left; - int r = line[i].right; - - while ((i+1<MAX_WORDS_PER_LINE) && (line[i].right != 0)) { - line[i].left = left; - line[i].right = right; - i++; - left = l; - right = r; - l = line[i].left; - r = line[i].right; - } - if (i+1<MAX_WORDS_PER_LINE) { - line[i].left = left; - line[i].right = right; - line[i+1].left = 0; - line[i+1].right = 0; - } - } - } -} - -/* - * is_in_column - return TRUE if value is present in line. - */ - -int html_printer::is_in_column (struct text_defn *line, struct text_defn *item, int max_words) -{ - int i=0; - - while ((i<max_words) && (line[i].right != 0)) { - if (line[i].left == item->left) { - return( TRUE ); - } else { - i++; - } - } - return( FALSE ); -} - -/* - * calculate_right - calculate the right most margin for each column in line. - */ - -void html_printer::calculate_right (struct text_defn *line, int max_words) -{ - int i=0; - - while ((i<max_words) && (line[i].right != 0)) { - if (i>0) { - line[i-1].right = line[i].left; - } - i++; - } -} - -/* - * add_right_full_width - adds an extra column to the right to bring the table up to - * full width. - */ - -void html_printer::add_right_full_width (struct text_defn *line, int mingap) -{ - int i=0; - - while ((i<MAX_WORDS_PER_LINE) && (line[i].right != 0)) { - i++; - } - - if ((i>0) && (line[i-1].right != right_margin_indent) && (i+1<MAX_WORDS_PER_LINE)) { - line[i].left = min(line[i-1].right+mingap, right_margin_indent); - line[i].right = right_margin_indent; - i++; - if (i<MAX_WORDS_PER_LINE) { - line[i].left = 0; - line[i].right = 0; - } - } -} - -/* - * determine_right_most_column - works out the right most limit of the right most column. - * Required as we might be performing a .2C and only - * have enough text to fill the left column. - */ - -void html_printer::determine_right_most_column (struct text_defn *line, int max_words) -{ - int i=0; - - while ((i<max_words) && (line[i].right != 0)) { - i++; - } - if (i>0) { - // remember right_margin_indent is the right most position for this page - line[i-1].right = column_calculate_right_margin(line[i-1].left, right_margin_indent); - } -} - -/* - * is_column_match - returns TRUE if a word is aligned in the same horizontal alignment - * between two lines, line1 and line2. If so then this horizontal - * position is saved in match. - */ - -int html_printer::is_column_match (struct text_defn *match, - struct text_defn *line1, struct text_defn *line2, int max_words) -{ - int i=0; - int j=0; - int found=FALSE; - int first=(match[0].left==0); - - if (first) { - struct text_defn t; - - t.left = left_margin_indent; - t.right = 0; - - include_into_list(match, &t); - } - while ((line1[i].right != 0) && (line2[i].right != 0)) { - if (line1[i].left == line2[j].left) { - // same horizontal alignment found - include_into_list(match, &line1[i]); - i++; - j++; - found = TRUE; - } else if (line1[i].left < line2[j].left) { - i++; - } else { - j++; - } - } - calculate_right(match, max_words); - return( found ); -} - -/* - * check_lack_of_hits - returns TRUE if a column has been moved to a position - * of only one hit from a position of more than one hit. - */ - -int html_printer::check_lack_of_hits (struct text_defn *next_guess, - struct text_defn *last_guess, - text_glob *start, int limit) -{ - text_glob *current=page_contents->words.get_data(); - int n=count_columns(last_guess); - int m=count_columns(next_guess); - int i, j; - - if (limit > 0) { - rewind_text_to(start); - count_hits(last_guess, n, limit); - rewind_text_to(current); - i=0; - j=0; - while ((i<n) && (j<m) && - (last_guess[i].right != 0) && (next_guess[j].right != 0)) { - if ((is_intersection(last_guess[i].left, last_guess[i].right, - next_guess[j].left, next_guess[j].right)) && - (next_guess[j].left < last_guess[i].left) && - (last_guess[i].is_used >= 2)) { - /* - * next_guess has to be = 1 as this position is new - */ - return( TRUE ); - } - if (last_guess[i].left < next_guess[j].left) { - i++; - } else { - j++; - } - } - } - return( FALSE ); -} - -/* - * remove_white_using_words - remove white space in, last_guess, by examining, next_line - * placing results into next_guess. - * It returns TRUE if the same columns exist in next_guess and last_guess - * we do allow columns to shrink but if a column disappears then we return FALSE. - */ - -int html_printer::remove_white_using_words (struct text_defn *next_guess, - struct text_defn *last_guess, struct text_defn *next_line) -{ - int i=0; - int j=0; - int k=0; - int removed=FALSE; - - while ((last_guess[j].right != 0) && (next_line[k].right != 0)) { - if (last_guess[j].left == next_line[k].left) { - // same horizontal alignment found - next_guess[i].left = last_guess[j].left; - next_guess[i].right = max(last_guess[j].right, next_line[k].right); - i++; - j++; - k++; - if ((next_guess[i-1].right > last_guess[j].left) && (last_guess[j].right != 0)) { - removed = TRUE; - } - } else if (last_guess[j].right < next_line[k].left) { - next_guess[i].left = last_guess[j].left; - next_guess[i].right = last_guess[j].right; - i++; - j++; - } else if (last_guess[j].left > next_line[k].right) { - // insert a word sequence from next_line[k] - next_guess[i].left = next_line[k].left; - next_guess[i].right = next_line[k].right; - i++; - k++; - } else if (is_intersection(last_guess[j].left, last_guess[j].right, next_line[k].left, next_line[k].right)) { - // potential for a column disappearing - next_guess[i].left = min(last_guess[j].left , next_line[k].left); - next_guess[i].right = max(last_guess[j].right, next_line[k].right); - i++; - j++; - k++; - if ((next_guess[i-1].right > last_guess[j].left) && (last_guess[j].right != 0)) { - removed = TRUE; - } - } - } - while (next_line[k].right != 0) { - next_guess[i].left = next_line[k].left; - next_guess[i].right = next_line[k].right; - i++; - k++; - } - if (i<MAX_WORDS_PER_LINE) { - next_guess[i].left = 0; - next_guess[i].right = 0; - } - if (debug_table_on) { - if (removed) { - fprintf(stderr, "have removed column\n"); - } else { - fprintf(stderr, "have NOT removed column\n"); - } - fflush(stderr); - } - remove_redundant_columns(next_guess); - return( removed ); -} - -/* - * count_columns - returns the number of elements inside, line. - */ - -int html_printer::count_columns (struct text_defn *line) -{ - int i=0; - - while (line[i].right != 0) { - i++; - } - return( i ); -} - -/* - * rewind_text_to - moves backwards until page_contents is looking at, g. - */ - -void html_printer::rewind_text_to (text_glob *g) -{ - while (page_contents->words.get_data() != g) { - if (page_contents->words.is_equal_to_head()) { - page_contents->words.start_from_tail(); - } else { - page_contents->words.move_left(); - } - } -} - -/* - * can_loose_column - checks to see whether we should combine two columns. - * This is allowed if there are is only one hit on the - * left hand edge and the previous column is very close. - */ - -void html_printer::can_loose_column (text_glob *start, struct text_defn *last_guess, int limit) -{ - text_glob *current=page_contents->words.get_data(); - int n=count_columns(last_guess); - int i; - - rewind_text_to(start); - count_hits(last_guess, n, limit); - i=0; - while (i<n-1) { - if ((last_guess[i+1].is_used == 1) && - (calculate_min_gap(start) > (last_guess[i+1].left-last_guess[i].right))) { - last_guess[i].right = last_guess[i+1].right; - remove_entry_in_line(last_guess, i+1); - n = count_columns(last_guess); - i = 0; - } else { - i++; - } - } - rewind_text_to(current); -} - -/* - * display_columns - a long overdue debugging function, as this column code is causing me grief :-( - */ - -void html_printer::display_columns (const char *word, const char *name, text_defn *line) -{ - int i=0; - - fprintf(stderr, "[%s:%s]", name, word); - while (line[i].right != 0) { - fprintf(stderr, " <left=%d right=%d %d%%> ", line[i].left, line[i].right, line[i].percent); - i++; - } - fprintf(stderr, "\n"); - fflush(stderr); -} - -/* - * copy_line - dest = src - */ - -void html_printer::copy_line (struct text_defn *dest, struct text_defn *src) -{ - int k; - - for (k=0; ((src[k].right != 0) && (k<MAX_WORDS_PER_LINE)); k++) { - dest[k].left = src[k].left; - dest[k].right = src[k].right; - } - if (k<MAX_WORDS_PER_LINE) { - dest[k].left = 0; - dest[k].right = 0; - } -} - -/* - * add_column_gaps - adds empty columns between columns which don't exactly align - */ - -void html_printer::add_column_gaps (struct text_defn *line) -{ - int i=0; - struct text_defn t; - - // firstly lets see whether we need an initial column on the left hand side - if ((line[0].left != get_left()) && (line[0].right != 0) && - (get_left() < line[0].left) && (is_worth_column(get_left(), line[0].left))) { - t.left = get_left(); - t.right = line[0].left; - include_into_list(line, &t); - } - - while ((i<MAX_WORDS_PER_LINE) && (line[i].right != 0)) { - if ((i+1<MAX_WORDS_PER_LINE) && (line[i+1].right != 0) && (line[i].right != line[i+1].left) && - (is_worth_column(line[i].right, line[i+1].left))) { - t.left = line[i].right; - t.right = line[i+1].left; - include_into_list(line, &t); - i=0; - } else { - i++; - } - } - // now let us see whether we need a final column on the right hand side - if ((i>0) && (line[i-1].right != right_margin_indent) && - (is_worth_column(line[i-1].right, right_margin_indent))) { - t.left = line[i-1].right; - t.right = right_margin_indent; - include_into_list(line, &t); - } -} - -/* - * is_continueous_column - returns TRUE if a line has a word on one - * of the last_col right most boundaries. - */ - -int html_printer::is_continueous_column (text_defn *last_col, text_defn *next_line) -{ - int w = count_columns(next_line); - int c = count_columns(last_col); - int i, j; - - for (i=0; i<c; i++) { - for (j=0; j<w; j++) { - if (last_col[i].right == next_line[j].right) { - return( TRUE ); - } - } - } - return( FALSE ); -} - -/* - * is_exact_left - returns TRUE if a line has a word on one - * of the last_col left most boundaries. - */ - -int html_printer::is_exact_left (text_defn *last_col, text_defn *next_line) -{ - int w = count_columns(next_line); - int c = count_columns(last_col); - int i, j; - - for (i=0; i<c; i++) { - for (j=0; j<w; j++) { - if ((last_col[i].left == next_line[j].left) || - (last_col[i].left != left_margin_indent)) { - return( TRUE ); - } - } - } - return( FALSE ); -} - -/* - * continue_searching_column - decides whether we should carry on searching text for a column. - */ - -int html_printer::continue_searching_column (text_defn *next_col, - text_defn *last_col, - text_defn *all_words) -{ - int count = count_columns(next_col); - int words = count_columns(all_words); - - if ((words == 0) || ((words == 1) && - (all_words[0].left == left_margin_indent) && - (all_words[0].right == right_margin_indent))) { - // no point as we have now seen a full line of contineous text with no gap - return( FALSE ); - } - return( (count == count_columns(last_col)) && - (last_col[0].left != left_margin_indent) || (last_col[0].right != right_margin_indent) ); -} - -/* - * is_worth_column - returns TRUE if the size of this column is worth defining. - */ - -int html_printer::is_worth_column (int left, int right) -{ -#if 0 - return( abs(right-left) >= MIN_COLUMN ); -#endif - return( TRUE ); -} - -/* - * large_enough_gap - returns TRUE if a large enough gap for one line was seen. - * We need to make sure that a single line definitely warrents - * a table. - * It also removes other smaller gaps. - */ - -int html_printer::large_enough_gap (text_defn *last_col) -{ - int i=0; - int found=FALSE; - int r=font::res; - int gap=r/GAP_WIDTH_ONE_LINE; - - if (abs(last_col[i].left - left_margin_indent) >= gap) { - found = TRUE; - } - while ((last_col[i].right != 0) && (last_col[i+1].right != 0)) { - if (abs(last_col[i+1].left-last_col[i].right) >= gap) { - found = TRUE; - i++; - } else { - // not good enough for a single line, remove it - last_col[i].right = last_col[i+1].right; - remove_entry_in_line(last_col, i+1); - } - } - return( found ); -} - -/* - * is_subset_of_columns - returns TRUE if line, a, is a subset of line, b. - */ - -int html_printer::is_subset_of_columns (text_defn *a, text_defn *b) -{ - int i; - int j; - - i=0; - while ((i<MAX_WORDS_PER_LINE) && (a[i].right != 0)) { - j=0; - while ((j<MAX_WORDS_PER_LINE) && (b[j].right != 0) && - ((b[j].left != a[i].left) || (b[j].right != a[i].right))) { - j++; - } - if ((j==MAX_WORDS_PER_LINE) || (b[j].right == 0)) { - // found a different column - not a subset - return( FALSE ); - } - i++; - } - return( TRUE ); -} - -/* - * count_hits - counts the number of hits per column. A left hit - * is when the left hand position of a glob hits - * the left hand column. - */ - -void html_printer::count_hits (text_defn *col, int no_of_columns, int limit) -{ - int i; - text_glob *start = page_contents->words.get_data(); - text_glob *g = start; - - // firstly reset the used field - for (i=0; i<no_of_columns; i++) { - col[i].is_used = 0; - } - // now calculate the left hand hits - while ((g != 0) && (g->minv <= limit)) { - i=0; - while ((i<no_of_columns) && (col[i].right < g->minh)) { - i++; - } - if ((col[i].left == g->minh) && (col[i].right != 0)) { - col[i].is_used++; - } - page_contents->words.move_right(); - if (page_contents->words.is_equal_to_head()) { - g = 0; - page_contents->words.start_from_tail(); - } else { - g=page_contents->words.get_data(); - } - } -} - -/* - * count_right_hits - counts the number of right hits per column. - * A right hit is when the left hand position - * of a glob hits the right hand column. - */ - -void html_printer::count_right_hits (text_defn *col, int no_of_columns) -{ - int i; - text_glob *start = page_contents->words.get_data(); - text_glob *g = start; - - // firstly reset the used field - for (i=0; i<no_of_columns; i++) { - col[i].right_hits = 0; - } - // now calculate the left hand hits - while ((g != 0) && (g->minv <= indentation.vertical_limit)) { - i=0; - while ((i<no_of_columns) && (col[i].right < g->minh)) { - i++; - } - if ((i<no_of_columns) && (col[i].right == g->maxh)) { - if (debug_table_on) { - fprintf(stderr, "found right hit [%s] at %d in %d\n", - g->text_string, g->maxh, i); - fflush(stderr); - } - col[i].right_hits++; - } - page_contents->words.move_right(); - if (page_contents->words.is_equal_to_head()) { - g = 0; - page_contents->words.start_from_tail(); - } else { - g=page_contents->words.get_data(); - } - } -} - -/* - * right_indentation - returns TRUE if a single column has been found and - * it resembles an indentation. Ie .RS/.RE or ABSTACT - */ - -int html_printer::right_indentation (struct text_defn *last_guess) -{ - // it assumes that last_guess contains a single column - return( (last_guess[0].left > left_margin_indent) ); -} - -/* - * able_to_steal_width - returns TRUE if we have an unused column which we can steal from. - * It must have more than MIN_TEXT_PERCENT to do this. - */ - -int html_printer::able_to_steal_width (void) -{ - int i; - - for (i=0; i<indentation.no_of_columns; i++) { - if ((! indentation.columns[i].is_used) && - (indentation.columns[i].percent > MIN_TEXT_PERCENT)) { - return( TRUE ); - } - } - return( FALSE ); -} - -/* - * is_divisible_by - returns TRUE if n is divisible by d leaving no remainder. - */ - -static int is_divisible_by (int n, int d) -{ - return( (n % d) == 0 ); -} - -/* - * need_to_steal_width - returns TRUE if a used column need to be - * given a little extra width for safty sake. - */ - -int html_printer::need_to_steal_width (void) -{ - int i; - - for (i=0; i<indentation.no_of_columns; i++) { - if ((indentation.columns[i].is_used) && - (indentation.columns[i].percent == (((indentation.columns[i].right - indentation.columns[i].left) * 100) / - (right_margin_indent-left_margin_indent))) && - (indentation.columns[i].percent < PERCENT_THRESHOLD)) { - return( TRUE ); - } - } - return( FALSE ); -} - -/* - * utilize_round_off - utilize the remaining percent width in text columns - */ - -void html_printer::utilize_round_off (void) -{ - int total = total_percentages(); - int excess, i; - - // use up the spare excess - - excess = 100-total; - - for (i=0; (i<indentation.no_of_columns) && (excess>0); i++) { - if ((indentation.columns[i].is_used) && - (indentation.columns[i].percent < PERCENT_THRESHOLD)) { - indentation.columns[i].percent++; - excess--; - } - } - // we might as well try and keep any numbers simple if possible - for (i=0; (i<indentation.no_of_columns) && (excess>0); i++) { - if ((indentation.columns[i].is_used) && - (! is_divisible_by(indentation.columns[i].percent, MIN_TEXT_PERCENT))) { - indentation.columns[i].percent++; - excess--; - } - } - // forget the niceties lets just use excess up now! - for (i=0; (i<indentation.no_of_columns) && (excess>0); i++) { - if (indentation.columns[i].is_used) { - indentation.columns[i].percent++; - excess--; - } - } -} - -/* - * can_distribute_fairly - returns TRUE if we can redistribute some of the unused width into - * columns that are used. - */ - -int html_printer::can_distribute_fairly (void) -{ - int i; - int total=0; - int used =0; - int excess; - - // firstly total up all percentages - so we can use round offs - for (i=0; i<indentation.no_of_columns; i++) { - total += indentation.columns[i].percent; - if ((indentation.columns[i].is_used) && - (indentation.columns[i].percent < PERCENT_THRESHOLD)) { - used++; - } - } - // - excess = 100-total; - if (excess < used) { - for (i=0; i<indentation.no_of_columns; i++) { - if (! indentation.columns[i].is_used) { - if (indentation.columns[i].percent > MIN_TEXT_PERCENT) { - indentation.columns[i].percent--; - excess++; - } - } - } - } - if (excess >= used) { - for (i=0; i<indentation.no_of_columns; i++) { - if ((indentation.columns[i].is_used) && - (indentation.columns[i].percent < PERCENT_THRESHOLD) && - (indentation.columns[i].percent == (((indentation.columns[i].right - indentation.columns[i].left) * 100) / - (right_margin_indent-left_margin_indent)))) { - indentation.columns[i].percent++; - excess--; - } - } - return( TRUE ); - } - return( FALSE ); -} - -/* - * remove_table_column - removes column, i, from the indentation. - */ - -void html_printer::remove_table_column (int i) -{ - while (i<indentation.no_of_columns) { - indentation.columns[i].left = indentation.columns[i+1].left; - indentation.columns[i].right = indentation.columns[i+1].right; - indentation.columns[i].is_used = indentation.columns[i+1].is_used; - indentation.columns[i].percent = indentation.columns[i+1].percent; - i++; - } - indentation.no_of_columns--; -} - -/* - * next_line_on_left_column - returns TRUE if the next line in - * column, i, has a word on the left margin. - */ - -int html_printer::next_line_on_left_column (int i, text_glob *start) -{ - int current_vpos=start->minv; - - while ((start != 0) && (start->minv < indentation.vertical_limit) && - (is_on_same_line(start, current_vpos))) { - if (page_contents->words.is_equal_to_tail()) { - start = 0; - } else { - page_contents->words.move_right(); - start = page_contents->words.get_data(); - } - } - if ((start != 0) && (start->minv < indentation.vertical_limit)) { - // onto next line now - current_vpos=start->minv; - while ((start != 0) && (start->minv < indentation.vertical_limit) && - (is_on_same_line(start, current_vpos))) { - if (start->minh == indentation.columns[i].left) { - return( TRUE ); - } - if (page_contents->words.is_equal_to_tail()) { - start = 0; - } else { - page_contents->words.move_right(); - start = page_contents->words.get_data(); - } - } - } - return( FALSE ); -} - -/* - * will_wrap_text - returns TRUE if text is wrapped in column, i. - */ - -int html_printer::will_wrap_text (int i, text_glob *start) -{ - text_glob *current=page_contents->words.get_data(); - - if (auto_on) { - rewind_text_to(start); - while ((start != 0) && (start->minv < indentation.vertical_limit)) { - if (indentation.columns[i].right == start->maxh) { - // ok right word is on column boarder - check next line - if (next_line_on_left_column(i, start)) { - rewind_text_to(current); - return( TRUE ); - } - } - if (page_contents->words.is_equal_to_tail()) { - start = 0; - } else { - page_contents->words.move_right(); - start = page_contents->words.get_data(); - } - } - } - rewind_text_to(current); - return( FALSE ); -} - -/* - * remove_unnecessary_unused - runs through a table and decides whether an unused - * column can be removed. This is only true if the - * column to the left does not wrap text. - */ - -void html_printer::remove_unnecessary_unused (text_glob *start) -{ - int i=0; - int left=get_left(); - int right; - - while (i<indentation.no_of_columns) { - if ((indentation.columns[i].is_used) && - (i+1<indentation.no_of_columns) && (! indentation.columns[i+1].is_used)) { - /* - * so i+1 is unused and there is a used column to the left. - * Now we check whether we can add the unused column to the column, i. - * This can only be done if column, i, is not wrapping text. - */ - if (! will_wrap_text(i, start)) { -#if 1 - if (i+1 < indentation.no_of_columns) { - right = indentation.columns[i+1].right; - } else { - right = right_margin_indent; - } - indentation.columns[i].percent = (((right - indentation.columns[i].left) * 100) / - (right_margin_indent-left)); -#else - indentation.columns[i].percent = (((indentation.columns[i+1].right - indentation.columns[i].left) * 100) / - (right_margin_indent-left)); -#endif - remove_table_column(i+1); - i=-1; - } - } - i++; - } -} - -/* - * remove_zero_percentage_column - removes all zero percentage width columns - */ - -void html_printer::remove_zero_percentage_column (void) -{ - int i=0; - - while (i<indentation.no_of_columns) { - if (indentation.columns[i].percent == 0) { - remove_table_column(i); - i=0; - } else { - i++; - } - } -} - -/* - * get_left - returns the actual left most margin. - */ - -int html_printer::get_left (void) -{ - if ((header_indent < left_margin_indent) && (header_indent != -1)) { - return( header_indent ); - } else { - if (margin_on) { - return( 0 ); - } else { - return( left_margin_indent ); - } - } -} - -/* - * calculate_percentage_width - calculates the percentage widths, - * this function will be generous to - * columns which have words as some browsers - * produce messy output if the percentage is exactly - * that required for text.. - * We try and round up to MIN_TEXT_PERCENT - * of course we can only do this if we can steal from - * an unused column. - */ - -void html_printer::calculate_percentage_width (text_glob *start) -{ - int i; - int left=get_left(); - int right; - - // firstly calculate raw percentages - for (i=0; i<indentation.no_of_columns; i++) { -#if 0 - indentation.columns[i].percent = (((indentation.columns[i].right - indentation.columns[i].left) * 100) / - (right_margin_indent-left)); -#else - if (i+1 < indentation.no_of_columns) { - right = indentation.columns[i+1].left; - } else { - right = right_margin_indent; - } - indentation.columns[i].percent = (((right - indentation.columns[i].left) * 100) / - (right_margin_indent-left)); -#endif - } - if (debug_table_on) { - display_columns(start->text_string, "[b4 steal] indentation.columns", indentation.columns); - } - - // now steal from the unused columns.. - remove_unnecessary_unused(start); - - if (debug_table_on) { - display_columns(start->text_string, "[after steal] indentation.columns", indentation.columns); - } - -#if 0 - utilize_round_off(); -#endif - remove_zero_percentage_column(); -} - - -/* - * is_column_subset - returns TRUE if the columns described by small can be contained in - * the columns in large. - */ - -int html_printer::is_column_subset (struct text_defn *small, struct text_defn *large) -{ - int ns=count_columns(small); - int nl=count_columns(large); - int found; - int i=0; - int j; - - while (i<ns) { - j=0; - found = FALSE; - while (j<nl) { - if (is_intersection(small[i].left, small[i].right, large[j].left, large[j].right)) { - found = TRUE; - if (! is_subsection(small[i].left, small[i].right, large[j].left, large[j].right)) { - // found column which is not a subset - return( FALSE ); - } - } - j++; - } - if (! found) { - return( FALSE ); - } - i++; - } - // small cannot be an empty set - return( ns>0 ); -} - -/* - * right_most_column - returns the right most column position. - */ - -int html_printer::right_most_column (struct text_defn *col) -{ - int i = count_columns(col); - - if (i>0) { - return( col[i-1].right ); - } else { - return( 0 ); - } -} - -/* - * large_enough_gap_for_two - returns TRUE if there exists a large enough gap - * for two lines. - */ - -int html_printer::large_enough_gap_for_two (struct text_defn *col) -{ - int i=0; - int found=FALSE; - int gap=MIN_COLUMN_FOR_TWO_LINES; - - if (abs(col[i].left - left_margin_indent) >= gap) { - found = TRUE; - } - while ((col[i].right != 0) && (col[i+1].right != 0)) { - if (abs(col[i+1].left-col[i].right) >= gap) { - found = TRUE; - i++; - } else { - // not good enough for this table, remove it - col[i].right = col[i+1].right; - remove_entry_in_line(col, i+1); - } - } - return( found ); -} - -/* - * is_small_table - applies some rigorous rules to test whether we should start this - * table at this point. - */ - -int html_printer::is_small_table (int lines, struct text_defn *last_guess, - struct text_defn *words_1, struct text_defn *cols_1, - struct text_defn *words_2, struct text_defn *cols_2, - int *limit, int *limit_1) -{ - /* - * firstly we check for an indented paragraph - */ - - if ((lines >= 2) && - (count_columns(cols_1) == count_columns(cols_2)) && (count_columns(cols_1) == 1) && - right_indentation(cols_1) && (! right_indentation(cols_2)) && - (cols_1[0].right == right_margin_indent)) { - return( FALSE ); - } - - if (lines == 2) { - /* - * as we only have two lines in our table we need to examine in detail whether - * we should construct a table from these two lines. - * For example if the text is the start of an indented paragraph and - * line1 and line2 are contineous then they should form one row in our table but - * if line1 and line2 are not contineous it is safer to treat them separately. - * - * We are prepared to reduce the table to one line - */ - if (((count_columns(cols_1) != count_columns(cols_2)) && (cols_1[0].left > cols_2[0].left)) || - (! ((is_column_subset(cols_1, cols_2)) || - (is_column_subset(cols_2, cols_1))))) { - /* - * now we must check to see whether line1 and line2 join - */ - if ((right_most_column(cols_1) == right_margin_indent) && - (cols_2[0].left == left_margin_indent)) { - /* - * looks like they join, we don't want a table at all. - */ - return( FALSE ); - } - /* - * use single line table - */ - lines--; - *limit = *limit_1; - copy_line(last_guess, cols_1); - } - } - - if ((count_columns(last_guess)==1) && (right_indentation(last_guess))) { - if (lines == 1) { - *limit = *limit_1; - } - return( TRUE ); - } - - /* - * check for large gap with single line or if multiple lines with more than one column - */ - - if (lines == 1) { - if (large_enough_gap(last_guess)) { - *limit = *limit_1; - return( TRUE ); - } - } else if (count_columns(last_guess)>1) { - if (lines == 2) { - return( large_enough_gap_for_two(last_guess) ); - } - return( TRUE ); - } - return( FALSE ); -} - - -/* - * is_appropriate_to_start_table - returns TRUE if it is appropriate to start the table - * at this point. - */ - -int html_printer::is_appropriate_to_start_table (struct text_defn *cols_1, - struct text_defn *cols_2, - struct text_defn *last_guess) -{ - if (count_columns(last_guess) == 1) { - if (debug_table_on) { - display_columns("", "[is] cols_1" , cols_1); - display_columns("", "[is] cols_2" , cols_2); - display_columns("", "[is] last_guess", last_guess); - } - - if (! ((is_column_subset(cols_1, cols_2)) || - (is_column_subset(cols_2, cols_1)))) { - return( FALSE ); - } - if ((count_columns(cols_1) == 1) && - (cols_1[0].left > left_margin_indent) && (cols_1[0].right < right_margin_indent) && - (cols_1[0].right != cols_2[0].right) && - (count_columns(last_guess) == 1)) { - return( FALSE ); - } - } - return( TRUE ); -} - -/* - * is_a_full_width_column - returns TRUE if there exists a full width column. - */ - -int html_printer::is_a_full_width_column (void) -{ - int i=0; - - while (i<indentation.no_of_columns) { - if (((indentation.columns[i].left == get_left()) || - (indentation.columns[i].left == left_margin_indent)) && - (indentation.columns[i].right == right_margin_indent)) { - return( TRUE ); - } - i++; - } - return( FALSE ); -} - -/* - * should_defer_table - returns TRUE if we should defer this table. - * This can occur if the first line seen indent - * is < than future lines. In which case it - * will cause future lines in this table - * to be indented. The lesser of the evils - * is to treat the first line by itself. - */ - -int html_printer::should_defer_table (int lines, struct text_glob *start, struct text_defn *cols_1) -{ - if (lines > 2) { - int i=0; - int c=count_columns(cols_1); - - count_hits(cols_1, count_columns(cols_1), indentation.vertical_limit); - rewind_text_to(start); - count_right_hits(cols_1, count_columns(cols_1)); - rewind_text_to(start); - while (i<c) { - if ((cols_1[i].is_used > 1) || (cols_1[i].right_hits > 1)) { - return( FALSE ); - } - i++; - } - /* - * first line (cols_1) is not aligned on any future column, we defer. - */ - return( TRUE ); - } - return( FALSE ); -} - -/* - * is_new_exact_right - returns TRUE if the, next_cols, has a word sitting - * on the right hand margin of last_guess. But only - * if no exact right word was found in last_cols. - */ - -int html_printer::is_new_exact_right (struct text_defn *last_guess, - struct text_defn *last_cols, - struct text_defn *next_cols) -{ - int n=count_columns(last_guess)-1; - return( FALSE ); - - if ((n>=0) && (last_guess[n].right != 0) && (last_cols[n].right != 0) && (next_cols[n].right != 0)) { - if ((last_cols[n].right != last_guess[n].right) && - ((next_cols[n].right == last_guess[n].right) || (next_cols[n].right == right_margin_indent))) { - return( TRUE ); - } - } - return( FALSE ); -} - -/* - * found_use_for_table - checks whether the some words on one line directly match - * the horizontal alignment of the line below. - * This is rather complex as we need to detect text tables - * such as .2C .IP Abstracts and indentations - * - * Algorithm is: - * - * read first line of text and calculate the significant - * gaps between words - * next next line of text and do the same - * if a conflict between these lines exists and - * first line is centered - * then - * return centered line - * elsif start of a table is found - * then - * repeat - * read next line of text and calculate significant gaps - * until conflict between the gaps is found - * record table - * return table found - * else - * return no table found - * fi - */ - -int html_printer::found_use_for_table (text_glob *start) -{ - text_glob *t; - struct text_defn all_words [MAX_WORDS_PER_LINE]; // logical OR of words on each line - struct text_defn words_1 [MAX_WORDS_PER_LINE]; // actual words found on first line - struct text_defn words_2 [MAX_WORDS_PER_LINE]; // actual words found on second line - struct text_defn cols_1 [MAX_WORDS_PER_LINE]; // columns found on line 1 - struct text_defn cols_2 [MAX_WORDS_PER_LINE]; // columns found on line 2 - struct text_defn last_words [MAX_WORDS_PER_LINE]; // actual words found on last line - struct text_defn last_cols [MAX_WORDS_PER_LINE]; // columns found so far - struct text_defn next_words [MAX_WORDS_PER_LINE]; // actual words found on last line (new) - struct text_defn next_cols [MAX_WORDS_PER_LINE]; // columns found on next line - struct text_defn last_guess [MAX_WORDS_PER_LINE]; // columns found on last line - // (logical AND of gaps (treat gaps = true)) - struct text_defn next_guess [MAX_WORDS_PER_LINE]; // columns found on next line - // (logical AND of gaps (treat gaps = true)) - struct text_defn prev_guess [MAX_WORDS_PER_LINE]; // temporary copy of last_guess - int i =0; - int lines =1; // number of lines read - int limit; // vertical limit reached in our table - int limit_1; // vertical position after line 1 - -#if 0 - if (strcmp(start->text_string, "<hr>") == 0) { - stop(); - } -#endif - - /* - * get first set of potential columns into last_line, call this last_guess - */ - limit = collect_columns(words_1, cols_1, 0, 0, MAX_WORDS_PER_LINE); - limit_1 = limit; - copy_line(last_guess, cols_1); - - /* - * initialize the all_words columns - if this should ever equal a complete line - * with no gaps then we terminate the table. - */ - copy_line(all_words, cols_1); - - /* - * and set the current limit found - */ - indentation.vertical_limit = limit; - - /* - * have we reached the end of page? - */ - if (page_contents->words.is_equal_to_head() || (limit == 0)) { - cols_2[0].left = 0; - cols_2[0].right = 0; - } else { - /* - * the answer to the previous question was no. - * So we need to examine the next line - */ - limit = collect_columns(words_2, cols_2, words_1, cols_1, MAX_WORDS_PER_LINE); - if (limit >= 0) { - lines++; - } - } - - /* - * now check to see whether the first line looks like a single centered line - */ - if (single_centered_line(cols_1, cols_2, start)) { - rewind_text_to(start); - write_centered_line(start); - /* - * indicate to caller than we have centered text, not found a table. - */ - indentation.no_of_columns = 0; - return( TRUE ); - } else if (! table_on) { - /* - * user does not allow us to find a table (we are allowed to find centered lines (above)) - */ - rewind_text_to(start); - return( FALSE ); - } - - /* - * remove any gaps from all_words - */ - combine_line(all_words, cols_2); - if (debug_table_on) { - display_columns(start->text_string, "[1] all_words" , all_words); - display_columns(start->text_string, "[1] cols_1" , cols_1); - display_columns(start->text_string, "[1] words_1" , words_1); - display_columns(start->text_string, "[1] cols_2" , cols_2); - display_columns(start->text_string, "[1] words_2" , words_2); - display_columns(start->text_string, "[1] last_guess", last_guess); - } - - /* - * next_guess = last_guess AND next_cols (where gap = true) - */ - - if (remove_white_using_words(prev_guess, last_guess, cols_2)) { - } - if (remove_white_using_words(next_guess, prev_guess, all_words)) { - } - - if (debug_table_on) { - display_columns(start->text_string, "[2] next_guess", next_guess); - } - - copy_line(prev_guess, cols_1); - combine_line(prev_guess, cols_2); - - /* - * if no sequence of words crosses a column and - * both the last column and all_words are not a full solid line of text - */ - if ((! conflict_with_words(next_guess, all_words)) && - (continue_searching_column(next_guess, next_guess, all_words)) && - (is_appropriate_to_start_table(cols_1, cols_2, prev_guess)) && - (! page_contents->words.is_equal_to_head()) && - ((end_region_vpos < 0) || (limit < end_region_vpos)) && - (limit > 0)) { - - /* - * subtract any columns which are bridged by a sequence of words - */ - - copy_line(next_cols , cols_2); - copy_line(next_words, words_2); - - do { - copy_line(prev_guess, next_guess); // copy next_guess away so we can compare it later - combine_line(last_guess, next_guess); - - if (debug_table_on) { - t = page_contents->words.get_data(); - display_columns(t->text_string, "[l] last_guess", last_guess); - } - indentation.vertical_limit = limit; - - copy_line(last_cols, next_cols); - copy_line(last_words, next_words); - if (page_contents->words.is_equal_to_head()) { - /* - * terminate the search - */ - next_cols[0].left = 0; - next_cols[0].right = 0; - } else { - limit = collect_columns(next_words, next_cols, last_words, last_cols, MAX_WORDS_PER_LINE); - lines++; - } - - combine_line(all_words, next_cols); - if (debug_table_on) { - display_columns(t->text_string, "[l] all_words" , all_words); - display_columns(t->text_string, "[l] last_cols" , last_cols); - display_columns(t->text_string, "[l] next_words", next_words); - display_columns(t->text_string, "[l] next_cols" , next_cols); - } - - if (limit >= 0) { - /* - * (if limit is < 0 then the table ends anyway.) - * we check to see whether we should combine close columns. - */ - can_loose_column(start, last_guess, limit); - } - t = page_contents->words.get_data(); -#if 0 - if (strcmp(t->text_string, "heT") == 0) { - stop(); - } -#endif - - } while ((! remove_white_using_words(next_guess, last_guess, next_cols)) && - (! conflict_with_words(next_guess, all_words)) && - (continue_searching_column(next_guess, last_guess, all_words)) && - ((is_continueous_column(prev_guess, last_cols)) || (is_exact_left(last_guess, next_cols))) && - (! is_new_exact_right(last_guess, last_cols, next_cols)) && - (! page_contents->words.is_equal_to_head()) && - (! check_lack_of_hits(next_guess, last_guess, start, limit)) && - ((end_region_vpos <= 0) || (t->minv < end_region_vpos)) && - (limit >= 0)); - lines--; - } - - if (limit < 0) { - indentation.vertical_limit = limit; - } - - if (page_contents->words.is_equal_to_head()) { - // end of page check whether we should include everything - if ((! conflict_with_words(next_guess, all_words)) && - (continue_searching_column(next_guess, last_guess, all_words)) && - ((is_continueous_column(prev_guess, last_cols)) || (is_exact_left(last_guess, next_cols)))) { - // end of page reached - therefore include everything - page_contents->words.start_from_tail(); - t = page_contents->words.get_data(); - combine_line(last_guess, next_guess); - indentation.vertical_limit = t->minv; - } - } else { - t = page_contents->words.get_data(); - if (((! conflict_with_words(last_guess, all_words))) && - (t->minv > end_region_vpos) && (end_region_vpos > 0)) { - indentation.vertical_limit = limit; - } - if ((end_region_vpos > 0) && (t->minv > end_region_vpos)) { - indentation.vertical_limit = min(indentation.vertical_limit, end_region_vpos+1); - } else if (indentation.vertical_limit < 0) { - // -1 as we don't want to include section heading itself - indentation.vertical_limit = -indentation.vertical_limit-1; - } - } - - if (debug_table_on) { - display_columns(start->text_string, "[1] all_words" , all_words); - display_columns(start->text_string, "[1] cols_1" , cols_1); - display_columns(start->text_string, "[1] words_1" , words_1); - display_columns(start->text_string, "[1] cols_2" , cols_2); - display_columns(start->text_string, "[1] words_2" , words_2); - display_columns(start->text_string, "[1] last_guess", last_guess); - display_columns(start->text_string, "[1] next_guess", next_guess); - } - rewind_text_to(start); - - i = count_columns(last_guess); - if ((i>1) || (right_indentation(last_guess))) { - - // was (continue_searching_column(last_guess, last_guess, all_words)))) { - if (should_defer_table(lines, start, cols_1)) { - /* - * yes, but let us check for a single line table - */ - lines = 1; - copy_line(last_guess, cols_1); - } - - if (is_small_table(lines, last_guess, words_1, cols_1, words_2, cols_2, - &indentation.vertical_limit, &limit_1)) { - - // copy match into permenant html_table - - if (indentation.columns != 0) { - free(indentation.columns); - } - if (debug_table_on) { - display_columns(start->text_string, "[x] last_guess", last_guess); - } - add_column_gaps(last_guess); - if (debug_table_on) { - display_columns(start->text_string, "[g] last_guess", last_guess); - } - - /* - * +1 for the potential header_margin - * +1 for null - */ - - indentation.no_of_columns = count_columns(last_guess); - indentation.columns = (struct text_defn *)malloc((indentation.no_of_columns+2)*sizeof(struct text_defn)); - - i=0; - while (i<=indentation.no_of_columns) { - indentation.columns[i].left = last_guess[i].left; - indentation.columns[i].right = last_guess[i].right; - i++; - } - - if (indentation.no_of_columns>0) { - assign_used_columns(start); - rewind_text_to(start); - calculate_percentage_width(start); - - if (debug_table_on) { - display_columns(start->text_string, "[g] indentation.columns", indentation.columns); - } - - /* - * clearly a single column 100% is not worth using a table. - * Also we check to see whether the first line is sensibly - * part of this table. - */ - if (is_a_full_width_column()) { - indentation.no_of_columns = 0; - free( indentation.columns ); - indentation.columns = 0; - } else { - return( TRUE ); - } - } - } - } - return( FALSE ); -} - -/* - * define_cell - creates a table cell using the percentage width. - */ - -void html_printer::define_cell (int i) -{ - html.put_string("<td valign=\"top\" align=\"left\" width=\""); - html.put_number(indentation.columns[i].percent); - html.put_string("%\">\n"); -} - -/* - * column_display_word - given a left, right pair and the indentation.vertical_limit - * write out html text within this region. - */ - -void html_printer::column_display_word (int cell, int vert, int left, int right, int next) -{ - text_glob *g=page_contents->words.get_data(); - - supress_sub_sup = TRUE; - if (left != next) { - define_cell(cell); - begin_paragraph_no_height(left_alignment); - while ((g != 0) && (g->minv <= vert)) { - if ((left <= g->minh) && (g->minh<right)) { - char *postword=html_position_text(g, left, right); - - if (header.written_header) { - fatal("should never generate a header inside a table"); - } else { - if (g->is_raw_command) { - html.put_string((char *)g->text_string); - } else { - translate_to_html(g); - } - if (postword != 0) { - html.put_string(postword); - } - issued_newline = FALSE; - } - } - if (page_contents->words.is_equal_to_tail()) { - g = 0; - } else { - page_contents->words.move_right(); - g=page_contents->words.get_data(); - } - } - end_paragraph(); - html.put_string("</td>\n"); - if (g != 0) { - page_contents->words.move_left(); - // and correct output_vpos - g=page_contents->words.get_data(); - output_vpos = g->minv; - } - } -} - -/* - * total_percentages - returns the total of all the percentages in the table. - */ - -int html_printer::total_percentages () -{ - int i; - int sum=0; - - for (i=0; i<indentation.no_of_columns; i++) { - sum += indentation.columns[i].percent; - } - return( sum ); -} - -/* - * start_table - creates a table according with parameters contained within class html_table. - */ - -void html_printer::start_table (void) -{ - save_paragraph(); - html.put_string("\n<table width=\""); - html.put_number(total_percentages()); - html.put_string("%\" rules=\"none\" frame=\"none\" cols=\""); - html.put_number(indentation.no_of_columns); - html.put_string("\" cellspacing=\"0\" cellpadding=\"0\">\n"); -} - -/* - * end_table - finishes off a table. - */ - -void html_printer::end_table (void) -{ - html.put_string("</table>\n"); - indentation.no_of_columns = 0; - restore_paragraph(); - supress_sub_sup = TRUE; -} - - -/* - * is_in_table - returns TRUE if we are inside an html table. - */ - -int html_printer::is_in_table (void) -{ - return( indentation.no_of_columns != 0 ); -} - - -/* - * column_calculate_right_margin - scan through the column and find the right most margin - */ - -int html_printer::column_calculate_right_margin (int left, int right) -{ - if (left == right) { - return( right ); - } else { - int rightmost =-1; - int count = 0; - text_glob *start = page_contents->words.get_data(); - text_glob *g = start; - - while ((g != 0) && (g->minv <= indentation.vertical_limit)) { - if ((left <= g->minh) && (g->minh<right)) { - if (debug_on) { - fprintf(stderr, "right word = %s %d\n", g->text_string, g->maxh); fflush(stderr); - } - if (g->maxh == rightmost) { - count++; - } else if (g->maxh > rightmost) { - count = 1; - rightmost = g->maxh; - } - if (g->maxh > right) { - if (debug_on) { - fprintf(stderr, "problem as right word = %s %d [%d..%d]\n", - g->text_string, right, g->minh, g->maxh); fflush(stderr); - // stop(); - } - } - } - page_contents->words.move_right(); - if (page_contents->words.is_equal_to_head()) { - g = 0; - page_contents->words.start_from_tail(); - } else { - g=page_contents->words.get_data(); - } - } - rewind_text_to(start); - if (rightmost == -1) { - return( right ); // no words in this column - } else { - return( rightmost ); - } - } -} - -/* - * column_calculate_left_margin - scan through the column and find the left most margin - */ - -int html_printer::column_calculate_left_margin (int left, int right) -{ - if (left == right) { - return( left ); - } else { - int leftmost=right; - text_glob *start = page_contents->words.get_data(); - text_glob *g = start; - - while ((g != 0) && (g->minv <= indentation.vertical_limit)) { - if ((left <= g->minh) && (g->minh<right)) { - leftmost = min(g->minh, leftmost); - } - page_contents->words.move_right(); - if (page_contents->words.is_equal_to_head()) { - g = 0; - page_contents->words.start_from_tail(); - } else { - g=page_contents->words.get_data(); - } - } - rewind_text_to(start); - if (leftmost == right) { - return( left ); // no words in this column - } else { - return( leftmost ); - } - } -} - -/* - * find_column_index - returns the index to the column in which glob, t, exists. - */ - -int html_printer::find_column_index_in_line (text_glob *t, text_defn *line) -{ - int i=0; - - while ((line != 0) && ((line[i].right != 0) || (line[i].right != 0)) && - (! ((line[i].left<=t->minh) && (line[i].right>t->minh)))) { - i++; - } - return( i ); -} - -/* - * find_column_index - returns the index to the column in which glob, t, exists. - */ - -int html_printer::find_column_index (text_glob *t) -{ - int i=0; - - while ((i<indentation.no_of_columns) && - (! ((indentation.columns[i].left<=t->minh) && - (indentation.columns[i].right>t->minh)))) { - i++; - } - return( i ); -} - -/* - * determine_row_limit - checks each row to see if there is a gap in a cell. - * We return the vertical position after the empty cell - * at the start of the next line. - */ - -int html_printer::determine_row_limit (text_glob *start, int v) -{ - text_glob *t; - int i; - int vpos, last, prev; - text_glob *is_gap[MAX_WORDS_PER_LINE]; - text_glob zero(&start->text_style, 0, 0, 0, 0, 0, 0, 0, 0); - -#if 1 - if ((v == -1) && (strcmp(start->text_string, "CASE") == 0)) { - stop(); - } -#endif - - if (v >= indentation.vertical_limit) { - return( v+1 ); - } else { - /* - * initially we start with all gaps in our table - * after a gap we start a new row - * here we set the gap array to the previous line - */ - - if (v>=0) { - t = page_contents->words.get_data(); - if (t->minv < v) { - do { - page_contents->words.move_right(); - t = page_contents->words.get_data(); - } while ((! page_contents->words.is_equal_to_head()) && - (t->minv <= v)); - } - } - if (page_contents->words.is_equal_to_head()) { - t = &zero; - } else { - page_contents->words.move_left(); - t = page_contents->words.get_data(); - } - - prev = t->minv; - for (i=0; i<indentation.no_of_columns; i++) { - is_gap[i] = t; - } - - if (page_contents->words.is_equal_to_tail()) { - rewind_text_to(start); - return( indentation.vertical_limit ); - } else { - page_contents->words.move_right(); - } - t = page_contents->words.get_data(); - vpos = t->minv; - - // now check each row for a gap - do { - last = vpos; - vpos = t->minv; - if (vpos > indentation.vertical_limit) { - // we have reached the end of the table, quit - rewind_text_to(start); - return( indentation.vertical_limit ); - } - - i = find_column_index(t); - if (i>=indentation.no_of_columns) { - error("find_column_index has failed"); - stop(); - } else { - if (! is_on_same_line(t, last)) { - prev = last; - } - - if ((! is_on_same_line(is_gap[i], vpos)) && (! is_on_same_line(is_gap[i], prev)) && - (indentation.columns[i].is_used)) { - // no word on previous line - must be a gap - force alignment of row - rewind_text_to(start); - return( prev ); - } - is_gap[i] = t; - } - page_contents->words.move_right(); - t = page_contents->words.get_data(); - } while ((! page_contents->words.is_equal_to_head()) && - (vpos < indentation.vertical_limit) && (vpos >= last)); - page_contents->words.move_left(); - t = page_contents->words.get_data(); - rewind_text_to(start); - return( indentation.vertical_limit ); - } -} - -/* - * assign_used_columns - sets the is_used field of the column array of records. - */ - -void html_printer::assign_used_columns (text_glob *start) -{ - text_glob *t = start; - int i; - - for (i=0; i<indentation.no_of_columns; i++) { - indentation.columns[i].is_used = FALSE; - } - - rewind_text_to(start); - if (! page_contents->words.is_empty()) { - do { - i = find_column_index(t); - if (indentation.columns[i].right != 0) { - if (debug_table_on) { - fprintf(stderr, "[%s] in column %d at %d..%d limit %d\n", t->text_string, - i, t->minv, t->maxv, indentation.vertical_limit); fflush(stderr); - } - indentation.columns[i].is_used = TRUE; - } - page_contents->words.move_right(); - t = page_contents->words.get_data(); - } while ((t->minv<indentation.vertical_limit) && - (! page_contents->words.is_equal_to_head())); - } - if (debug_table_on) { - for (i=0; i<indentation.no_of_columns; i++) { - fprintf(stderr, " <left=%d right=%d is_used=%d> ", - indentation.columns[i].left, - indentation.columns[i].right, - indentation.columns[i].is_used); - } - fprintf(stderr, "\n"); - fflush(stderr); - } -} - -/* - * adjust_margin_percentages - so far we have ignored the header_indent - * and just considered left_margin_indent..right_margin_indent. - * (We do this since we can assume 100% is total width for main text). - * However as header_indent can be < left_margin_indent we need to - * recalculate the real percentages in the light of the extended width. - */ - -void html_printer::adjust_margin_percentages (void) -{ - if ((header_indent < left_margin_indent) && (header_indent != -1)) { - /* - * recalculation necessary - */ - int i=0; - - while (i<indentation.no_of_columns) { - indentation.columns[i].percent = (indentation.columns[i].percent * - (right_margin_indent - left_margin_indent)) / - (right_margin_indent - header_indent); - i++; - } - // remove_zero_percentage_column(); - } -} - -/* - * foreach_column_include_text - foreach column in a table place the - * appropriate html text. - */ - -void html_printer::foreach_column_include_text (text_glob *start) -{ - if (indentation.no_of_columns>0) { - int i; - int left, right; - int limit=-1; - - start_table(); - rewind_text_to(start); - count_right_hits(indentation.columns, indentation.no_of_columns); - rewind_text_to(start); - - do { - limit = determine_row_limit(start, limit); // find the bottom of the next row - html.put_string("<tr valign=\"top\" align=\"left\">\n"); - i=0; - start = page_contents->words.get_data(); - while (i<indentation.no_of_columns) { - // reset the output position to the start of column - rewind_text_to(start); - output_vpos = start->minv; - output_hpos = indentation.columns[i].left; - // and display each column until limit - right = column_calculate_right_margin(indentation.columns[i].left, - indentation.columns[i].right); - left = column_calculate_left_margin(indentation.columns[i].left, - indentation.columns[i].right); - - if (right>indentation.columns[i].right) { - if (debug_on) { - fprintf(stderr, "assert calculated right column edge is greater than column\n"); fflush(stderr); - // stop(); - } - } - - if (left<indentation.columns[i].left) { - if (debug_on) { - fprintf(stderr, "assert calculated left column edge is less than column\n"); fflush(stderr); - // stop(); - } - } - - if ((indentation.columns[i].right_hits == 1) && - (indentation.columns[i].right != right_margin_indent)) { - indentation.wrap_margin = FALSE; - if (debug_on) { - fprintf(stderr, "turning auto wrap off during column %d for start word %s\n", - i, start->text_string); - fflush(stderr); - // stop(); - } - } else { - indentation.wrap_margin = TRUE; - } - - column_display_word(i, limit, left, right, indentation.columns[i].right); - i++; - } - - if (page_contents->words.is_equal_to_tail()) { - start = 0; - } else { - page_contents->words.sub_move_right(); - if (page_contents->words.is_empty()) { - start = 0; - } else { - start = page_contents->words.get_data(); - } - } - - html.put_string("</tr>\n"); - } while (((limit < indentation.vertical_limit) && (start != 0) && - (! page_contents->words.is_empty())) || (limit == -1)); - end_table(); - - if (start == 0) { - // finished page remove all words - page_contents->words.start_from_head(); - while (! page_contents->words.is_empty()) { - page_contents->words.sub_move_right(); - } - } else if (! page_contents->words.is_empty()) { - page_contents->words.move_left(); - } - } -} - -/* - * write_centered_line - generates a line of centered text. - */ - -void html_printer::write_centered_line (text_glob *g) -{ - int current_vpos=g->minv; - - move_vertical(g, center_alignment); - - header.written_header = FALSE; - supress_sub_sup = TRUE; - output_vpos = g->minv; - output_hpos = g->minh; - do { - char *postword=html_position_text(g, left_margin_indent, right_margin_indent); - - if (! header.written_header) { - if (g->is_raw_command) { - html.put_string((char *)g->text_string); - } else { - translate_to_html(g); - } - if (postword != 0) { - html.put_string(postword); - } - need_one_newline = TRUE; - issued_newline = FALSE; - } - page_contents->words.move_right(); - g = page_contents->words.get_data(); - } while ((! page_contents->words.is_equal_to_head()) && (is_on_same_line(g, current_vpos))); - page_contents->words.move_left(); // so when we move right we land on the word following this centered line - need_one_newline = TRUE; -} - -/* - * is_in_middle - returns TRUE if the text defn, t, is in the middle of the page. - */ - -int html_printer::is_in_middle (int left, int right) -{ - return( abs(abs(left-left_margin_indent) - abs(right_margin_indent-right)) <= CENTER_TOLERANCE ); -} - -/* - * single_centered_line - returns TRUE if first is a centered line with a different - * margin to second. - */ - -int html_printer::single_centered_line (text_defn *first, text_defn *second, text_glob *g) -{ - return( - ((count_columns(first) == 1) && (first[0].left != left_margin_indent) && - (first[0].left != second[0].left) && is_in_middle(first->left, first->right)) - ); -} - -/* - * check_able_to_use_center - returns TRUE if we can see a centered line. - */ - -int html_printer::check_able_to_use_center (text_glob *g) -{ - if (auto_on && table_on && ((! is_on_same_line(g, output_vpos)) || issued_newline) && (! using_table_for_indent())) { - // we are allowed to check for centered line - // first check to see whether we might be looking at a set of columns - struct text_defn last_guess[MAX_WORDS_PER_LINE]; - struct text_defn last_words[MAX_WORDS_PER_LINE]; - - collect_columns(last_words, last_guess, 0, 0, MAX_WORDS_PER_LINE); - - rewind_text_to(g); - if ((count_columns(last_guess) == 1) && (is_in_middle(last_guess[0].left, last_guess[0].right))) { - write_centered_line(g); - return( TRUE ); - } - } - return( FALSE ); -} - -/* - * check_able_to_use_table - examines forthcoming text to see whether we can - * better format it by using an html transparent table. - */ - -int html_printer::check_able_to_use_table (text_glob *g) -{ - if (auto_on && ((! is_on_same_line(g, output_vpos)) || issued_newline) && (! using_table_for_indent())) { - // we are allowed to check for table - - if ((output_hpos != right_margin_indent) && (found_use_for_table(g))) { - foreach_column_include_text(g); - return( TRUE ); - } - } - return( FALSE ); -} - -/* - * move_vertical - if we are using html auto formatting then decide whether to - * break the line via a <br> or a </p><p> sequence. - */ - -void html_printer::move_vertical (text_glob *g, paragraph_type p) -{ - int r = font::res; - int height = (g->text_style.point_size+2)*r/72; // --fixme-- we always assume VS is PS+2 (could do better) - int temp_vpos; - - if (auto_on) { - if ((more_than_line_break(output_vpos, g->minv, height)) || (p != current_paragraph->para_type)) { - end_paragraph(); - begin_paragraph(p); - } else { - html_newline(); - } - } else { - if (output_vpos == -1) { - temp_vpos = g->minv; - } else { - temp_vpos = output_vpos; - } - - force_begin_paragraph(); - if (need_one_newline) { - html_newline(); - temp_vpos += height; - } else { - need_one_newline = TRUE; - } - - while ((temp_vpos < g->minv) && (more_than_line_break(temp_vpos, g->minv, height))) { - html_newline(); - temp_vpos += height; - } - } -} - -/* - * emit_space - emits a space within html, it checks for the font type and - * will change font depending upon, g. Courier spaces are larger - * than roman so we need consistancy when changing between them. - */ - -void html_printer::emit_space (text_glob *g, int force_space) -{ - if (! current_paragraph->need_paragraph) { - // only generate a space if we have written a word - as html will ignore it otherwise - if ((output_style != g->text_style) && (g->text_style.f != 0)) { - terminate_current_font(); - } - if (force_space || (g->minh > output_hpos)) { - html.put_string(" "); - } - change_font(g, TRUE); - } -} - -/* - * html_position_text - determine whether the text is subscript/superscript/normal - * or a header. - */ - -char *html_printer::html_position_text (text_glob *g, int left_margin, int right_margin) -{ - char *postword=0; - - begin_paragraph(left_alignment); - - if ((! header.written_header) && - (is_on_same_line(g, output_vpos) || - pretend_is_on_same_line(g, left_margin, right_margin))) { - - /* - * check whether we should supress superscripts and subscripts. - * I guess we might be able to do better by examining text on this line - * --fixme-- - */ - - if ((! is_on_same_line(g, output_vpos)) && (pretend_is_on_same_line(g, left_margin, right_margin))) { - supress_sub_sup = TRUE; - } - header.written_header = FALSE; - force_begin_paragraph(); - - // check whether we need to insert white space between words on 'same' line - if (pretend_is_on_same_line(g, left_margin, right_margin)) { - emit_space(g, TRUE); - } - - // check whether the font was reset after generating an image - if (output_style.f == 0) { - change_font(g, TRUE); - } - - if (looks_like_subscript(g)) { - - g->text_style.point_size = output_style.point_size; - g->minv = output_vpos; // this ensures that output_vpos doesn't alter - // which allows multiple subscripted words - move_horizontal(g, left_margin); - html.put_string("<sub>"); - postword = "</sub>"; - } else if (looks_like_superscript(g)) { - - g->text_style.point_size = output_style.point_size; - g->minv = output_vpos; - - move_horizontal(g, left_margin); - html.put_string("<sup>"); - postword = "</sup>"; - } else { - move_horizontal(g, left_margin); - } - supress_sub_sup = FALSE; - } else { - // we have found a new line - if (! header.written_header) { - move_vertical(g, left_alignment); - } - header.written_header = FALSE; - - if (processed_header(g)) { - // we must not alter output_vpos as we have peeped at the next word - // and set vpos to this - to ensure we do not generate a <br> after - // a heading. (The html heading automatically generates a line break) - output_hpos = left_margin; - return( postword ); - } else { - force_begin_paragraph(); - if ((! is_in_table()) && (margin_on)) { - make_html_indent(left_margin); - } - if (g->minh-left_margin != 0) { - make_html_indent(g->minh-left_margin); - } - change_font(g, TRUE); - supress_sub_sup = FALSE; - } - } - output_vpos = g->minv; - output_hpos = g->maxh; - return( postword ); -} - - -int html_printer::html_position_region (void) -{ - int r = font::res; - int height = output_style.point_size*r/72; - int temp_vpos; - int is_center = FALSE; - - if (output_style.point_size != 0) { - if (output_vpos != start_region_vpos) { - - // graphic starts on a different line - if (output_vpos == -1) { - temp_vpos = start_region_vpos; - } else { - temp_vpos = output_vpos; - } - supress_sub_sup = TRUE; - if (need_one_newline) { - html_newline(); - temp_vpos += height; - } else { - need_one_newline = TRUE; - } - - while ((temp_vpos < start_region_vpos) && - (more_than_line_break(temp_vpos, start_region_vpos, height))) { - html_newline(); - temp_vpos += height; - } - } - } - if (auto_on && (is_in_middle(start_region_hpos, end_region_hpos))) { - is_center = TRUE; - } else { - if (start_region_hpos > get_left()) { - make_html_indent(start_region_hpos-get_left()); - } - } - output_vpos = start_region_vpos; - output_hpos = start_region_hpos; - return( is_center ); -} - -/* - * gs_x - translate and scale the x axis - */ - -int html_printer::gs_x (int x) -{ - x += IMAGE_BOARDER_PIXELS/2; - return((x-start_region_hpos)*postscript_res/font::res); -} - - -/* - * gs_y - translate and scale the y axis - */ - -int html_printer::gs_y (int y) -{ - int yoffset=((int)(A4_PAGE_LENGTH*(double)font::res))-end_region_vpos; - - y += IMAGE_BOARDER_PIXELS/2; - return( (y+yoffset)*postscript_res/font::res ); -} - - -void html_printer::troff_position_text (text_glob *g) -{ - change_font(g, FALSE); - - troff.put_string("V"); - troff.put_number(gs_y(g->maxv)); - troff.put_string("\n"); - - troff.put_string("H"); - troff.put_number(gs_x(g->minh)); - troff.put_string("\n"); -} - -void html_printer::troff_change_font (const char *fontname, int size, int font_no) -{ - troff.put_string("x font "); - troff.put_number(font_no); - troff.put_string(" "); - troff.put_string(fontname); - troff.put_string("\nf"); - troff.put_number(font_no); - troff.put_string("\ns"); - troff.put_number(size*1000); - troff.put_string("\n"); -} - - -void html_printer::set_style(const style &sty) -{ -#if 0 - const char *fontname = sty.f->get_name(); - if (fontname == 0) - fatal("no internalname specified for font"); - - change_font(fontname, (font::res/(72*font::sizescale))*sty.point_size); -#endif -} - -void html_printer::end_of_line() -{ - flush_sbuf(); - output_hpos = -1; -} - -void html_printer::html_display_word (text_glob *g) -{ -#if 0 - if (strcmp(g->text_string, "ot") == 0) { - stop(); - } -#endif - if (! check_able_to_use_table(g)) { - char *postword=html_position_text(g, left_margin_indent, right_margin_indent); - - if (! header.written_header) { - if (g->is_raw_command) { - html.put_string((char *)g->text_string); - } else { - translate_to_html(g); - } - if (postword != 0) { - html.put_string(postword); - } - need_one_newline = TRUE; - issued_newline = FALSE; - } - } -} - -void html_printer::troff_display_word (text_glob *g) -{ - troff_position_text(g); - if (g->is_raw_command) { - int l=strlen((char *)g->text_string); - if (l == 1) { - troff.put_string("c"); - troff.put_string((char *)g->text_string); - troff.put_string("\n"); - } else if (l > 1) { - troff.put_string("C"); - troff.put_troffps_char((char *)g->text_string); - troff.put_string("\n"); - } - } else { - troff_position_text(g); - troff.put_string("t"); - troff.put_translated_string((const char *)g->text_string); - troff.put_string("\n"); - } -} - -void html_printer::display_word (text_glob *g, int is_to_html) -{ - if (is_to_html) { - html_display_word(g); - } else if ((g->is_raw_command) && (g->is_html_command)) { - // found a raw html command inside a graphic glob. - // We should emit the command to the html device, but of course we - // cannot place it correctly as we are dealing with troff words. - // Remember output_vpos will refer to troff and not html. - html.put_string((char *)g->text_string); - } else { - troff_display_word(g); - } -} - -/* - * translate_to_html - translates a textual string into html text - */ - -void html_printer::translate_to_html (text_glob *g) -{ - char buf[MAX_STRING_LENGTH]; - - str_translate_to_html(g->text_style.f, buf, MAX_STRING_LENGTH, - g->text_string, g->text_length, TRUE); - html.put_string(buf); -} - -/* - * html_knows_about - given a character name, troff, return TRUE - * if we know how to display this character using - * html unicode. - */ - -int html_printer::html_knows_about (char *troff) -{ - // --fixme-- needs to have similar code as above - return( FALSE ); -} - -/* - * display_fill - generates a troff format fill command - */ - -void html_printer::display_fill (graphic_glob *g) -{ - troff.put_string("Df ") ; - troff.put_number(g->fill); - troff.put_string(" 0\n"); -} - -/* - * display_line - displays a line using troff format - */ - -void html_printer::display_line (graphic_glob *g, int is_to_html) -{ - if (is_to_html) { - fatal("cannot emit lines in html"); - } - if (g->code == 'l') { - // straight line - - troff.put_string("V"); - troff.put_number(gs_y(g->point[0].y)); - troff.put_string("\n"); - - troff.put_string("H"); - troff.put_number(gs_x(g->point[0].x)); - troff.put_string("\n"); - - display_fill(g); - - troff.put_string("Dl "); - troff.put_number((g->point[1].x-g->point[0].x)*postscript_res/font::res); - troff.put_string(" "); - troff.put_number((g->point[1].y-g->point[0].y)*postscript_res/font::res); - troff.put_string("\n"); - // printf("line %c %d %d %d %d size %d\n", (char)g->code, g->point[0].x, g->point[0].y, - // g->point[1].x, g->point[1].y, g->size); - } else if ((g->code == 'c') || (g->code == 'C')) { - // circle - - int xradius = (g->maxh - g->minh) / 2; - int yradius = (g->maxv - g->minv) / 2; - // center of circle or elipse - - troff.put_string("V"); - troff.put_number(gs_y(g->minv+yradius)); - troff.put_string("\n"); - - troff.put_string("H"); - troff.put_number(gs_x(g->minh)); - troff.put_string("\n"); - - display_fill(g); - - if (g->code == 'c') { - troff.put_string("Dc "); - } else { - troff.put_string("DC "); - } - - troff.put_number(xradius*2*postscript_res/font::res); - troff.put_string("\n"); - - } else if ((g->code == 'e') || (g->code == 'E')) { - // ellipse - - int xradius = (g->maxh - g->minh) / 2; - int yradius = (g->maxv - g->minv) / 2; - // center of elipse - this is untested - - troff.put_string("V"); - troff.put_number(gs_y(g->minv+yradius)); - troff.put_string("\n"); - - troff.put_string("H"); - troff.put_number(gs_x(g->minh)); - troff.put_string("\n"); - - display_fill(g); - - if (g->code == 'e') { - troff.put_string("De "); - } else { - troff.put_string("DE "); - } - - troff.put_number(xradius*2*postscript_res/font::res); - troff.put_string(" "); - troff.put_number(yradius*2*postscript_res/font::res); - troff.put_string("\n"); - } else if ((g->code == 'p') || (g->code == 'P')) { - // polygon - troff.put_string("V"); - troff.put_number(gs_y(g->yc)); - troff.put_string("\n"); - - troff.put_string("H"); - troff.put_number(gs_x(g->xc)); - troff.put_string("\n"); - - display_fill(g); - - if (g->code == 'p') { - troff.put_string("Dp"); - } else { - troff.put_string("DP"); - } - - int i; - int xc=g->xc; - int yc=g->yc; - for (i=0; i<g->nopoints; i++) { - troff.put_string(" "); - troff.put_number((g->point[i].x-xc)*postscript_res/font::res); - troff.put_string(" "); - troff.put_number((g->point[i].y-yc)*postscript_res/font::res); - xc = g->point[i].x; - yc = g->point[i].y; - } - troff.put_string("\n"); - } else if (g->code == 'a') { - // arc - troff.put_string("V"); - troff.put_number(gs_y(g->yc)); - troff.put_string("\n"); - - troff.put_string("H"); - troff.put_number(gs_x(g->xc)); - troff.put_string("\n"); - - display_fill(g); - - troff.put_string("Da"); - - int i; - - for (i=0; i<g->nopoints; i++) { - troff.put_string(" "); - troff.put_number(g->point[i].x*postscript_res/font::res); - troff.put_string(" "); - troff.put_number(g->point[i].y*postscript_res/font::res); - } - troff.put_string("\n"); - } else if (g->code == '~') { - // spline - troff.put_string("V"); - troff.put_number(gs_y(g->yc)); - troff.put_string("\n"); - - troff.put_string("H"); - troff.put_number(gs_x(g->xc)); - troff.put_string("\n"); - - display_fill(g); - - troff.put_string("D~"); - - int i; - int xc=g->xc; - int yc=g->yc; - for (i=0; i<g->nopoints; i++) { - troff.put_string(" "); - troff.put_number((g->point[i].x-xc)*postscript_res/font::res); - troff.put_string(" "); - troff.put_number((g->point[i].y-yc)*postscript_res/font::res); - xc = g->point[i].x; - yc = g->point[i].y; - } - troff.put_string("\n"); - } -} - - -/* - * flush_sbuf - flushes the current sbuf into the list of glyphs. - */ - -void html_printer::flush_sbuf() -{ - if (sbuf_len > 0) { - int r=font::res; // resolution of the device - set_style(sbuf_style); - - page_contents->add(&sbuf_style, sbuf, sbuf_len, - 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; - sbuf_len = 0; - sbuf_dmark_hpos = -1; - } -} - - -void html_printer::set_line_thickness(const environment *env) -{ - line_thickness = env->size; - printf("line thickness = %d\n", line_thickness); -} - -void html_printer::draw(int code, int *p, int np, const environment *env) -{ - switch (code) { - - case 'l': - if (np == 2) { - page_contents->add_line(code, - env->hpos, env->vpos, env->hpos+p[0], env->vpos+p[1], - env->size, fill); - } else { - error("2 arguments required for line"); - } - 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': - // fall through - case 'p': - { - if (np & 1) { - error("even number of arguments required for polygon"); - break; - } - if (np == 0) { - error("no arguments for polygon"); - break; - } - // firstly lets add our current position to polygon - int oh=env->hpos; - int ov=env->vpos; - int i=0; - - while (i<np) { - p[i+0] += oh; - p[i+1] += ov; - oh = p[i+0]; - ov = p[i+1]; - i += 2; - } - // now store polygon in page - page_contents->add_polygon(code, np, p, env->hpos, env->vpos, env->size, fill); - } - break; - case 'E': - // fall through - case 'e': - if (np != 2) { - error("2 arguments required for ellipse"); - break; - } - page_contents->add_line(code, - env->hpos, env->vpos-p[1]/2, env->hpos+p[0], env->vpos+p[1]/2, - env->size, fill); - - break; - case 'C': - // fill circle - - case 'c': - { - // troff adds an extra argument to C - if (np != 1 && !(code == 'C' && np == 2)) { - error("1 argument required for circle"); - break; - } - page_contents->add_line(code, - env->hpos, env->vpos-p[0]/2, env->hpos+p[0], env->vpos+p[0]/2, - env->size, fill); - } - break; - case 'a': - { - if (np == 4) { - double c[2]; - - if (adjust_arc_center(p, c)) { - page_contents->add_arc('a', env->hpos, env->vpos, p, c, env->size, fill); - } else { - // a straignt line - page_contents->add_line('l', env->hpos, env->vpos, p[0]+p[2], p[1]+p[3], env->size, fill); - } - } else { - error("4 arguments required for arc"); - } - } - break; - case '~': - { - if (np & 1) { - error("even number of arguments required for spline"); - break; - } - if (np == 0) { - error("no arguments for spline"); - break; - } - // firstly lets add our current position to spline - int oh=env->hpos; - int ov=env->vpos; - int i=0; - - while (i<np) { - p[i+0] += oh; - p[i+1] += ov; - oh = p[i+0]; - ov = p[i+1]; - i += 2; - } - page_contents->add_spline('~', env->hpos, env->vpos, np, p, env->size, fill); - } - break; - case 'f': - { - if (np != 1 && np != 2) { - error("1 argument required for fill"); - break; - } - fill = p[0]; - if (fill < 0 || fill > FILL_MAX) { - // This means fill with the current color. - fill = FILL_MAX + 1; - } - break; - } - - default: - error("unrecognised drawing command `%1'", char(code)); - break; - } -} - - -void html_printer::begin_page(int n) -{ - page_number = n; - html.begin_comment("Page: ").comment_arg(i_to_a(page_number)).end_comment();; - no_of_printed_pages++; - - output_style.f = 0; - output_space_code = 32; - output_draw_point_size = -1; - output_line_thickness = -1; - output_hpos = -1; - output_vpos = -1; -} - -void testing (text_glob *g) {} - -void html_printer::flush_graphic (void) -{ - graphic_glob g; - - graphic_level = 0; - page_contents->is_in_graphic = FALSE; - - g.minv = -1; - g.maxv = -1; - calculate_region_range(&g); - if (g.minv != -1) { - page_contents->make_new_region(&g); - } - move_region_to_page(); -} - -void html_printer::end_page(int) -{ - flush_sbuf(); - flush_graphic(); - flush_page(); -} - -font *html_printer::make_font(const char *nm) -{ - return html_font::load_html_font(nm); -} - -html_printer::~html_printer() -{ - if (fseek(tempfp, 0L, 0) < 0) - fatal("fseek on temporary file failed"); - html.set_file(stdout); - fputs("<html>\n", stdout); - fputs("<head>\n", stdout); - fputs("<meta name=\"Content-Style\" content=\"text/css\">\n", stdout); - write_title(TRUE); - fputs("</head>\n", stdout); - fputs("<body>\n", stdout); - write_title(FALSE); - header.write_headings(stdout); - { - extern const char *Version_string; - html.begin_comment("Creator : ") - .comment_arg("groff ") - .comment_arg("version ") - .comment_arg(Version_string) - .end_comment(); - } - { -#ifdef LONG_FOR_TIME_T - long -#else - time_t -#endif - t = time(0); - html.begin_comment("CreationDate: ") - .comment_arg(ctime(&t)) - .end_comment(); - } - html.begin_comment("Total number of pages: ").comment_arg(i_to_a(no_of_printed_pages)).end_comment(); - html.end_line(); - html.copy_file(tempfp); - fputs("</body>\n", stdout); - fputs("</html>\n", stdout); - fclose(tempfp); -} - - -/* - * calculate_region_range - calculates the vertical range for words and lines - * within the region lists. - */ - -void html_printer::calculate_region_range (graphic_glob *r) -{ - text_glob *w; - graphic_glob *g; - - if (! page_contents->region_lines.is_empty()) { - page_contents->region_lines.start_from_head(); - do { - g = page_contents->region_lines.get_data(); - if ((r->minv == -1) || (g->minv < r->minv)) { - r->minv = g->minv; - } - if ((r->maxv == -1) || (g->maxv > r->maxv)) { - r->maxv = g->maxv; - } - page_contents->region_lines.move_right(); - } while (! page_contents->region_lines.is_equal_to_head()); - } - if (! page_contents->region_words.is_empty()) { - page_contents->region_words.start_from_head(); - do { - w = page_contents->region_words.get_data(); - - if ((r->minv == -1) || (w->minv < r->minv)) { - r->minv = w->minv; - } - if ((r->maxv == -1) || (w->maxv > r->maxv)) { - r->maxv = w->maxv; - } - page_contents->region_words.move_right(); - } while (! page_contents->region_words.is_equal_to_head()); - } -} - - -/* - * move_region_to_page - moves lines and words held in the temporary region - * list to the page list. - */ - -void html_printer::move_region_to_page (void) -{ - text_glob *w; - graphic_glob *g; - - page_contents->region_lines.start_from_head(); - while (! page_contents->region_lines.is_empty()) { - g = page_contents->region_lines.get_data(); // remove from our temporary region list - page_contents->lines.add(g); // and add to the page list - page_contents->region_lines.sub_move_right(); - } - page_contents->region_words.start_from_head(); - while (! page_contents->region_words.is_empty()) { - w = page_contents->region_words.get_data(); // remove from our temporary region list - page_contents->words.add(w); // and add to the page list - page_contents->region_words.sub_move_right(); - } -} - -/* - * is_graphic_start - returns TRUE if the start of table, pic, eqn was seen. - */ - -int is_graphic_start (char *s) -{ - return( (strcmp(s, "graphic-start") == 0) || - ((strcmp(s, "table-start") == 0) && (table_image_on)) ); -} - -/* - * is_graphic_end - return TRUE if the end of a table, pic, eqn was seen. - */ - -int is_graphic_end (char *s) -{ - return( (strcmp(s, "graphic-end") == 0) || - ((strcmp(s, "table-end") == 0) && (table_image_on)) ); -} - -/* - * special - handle all x X requests from troff. For grohtml they allow users - * to pass raw html commands, turn auto linked headings off/on and - * also allow tbl, eqn & pic say what commands they have generated. - */ - -void html_printer::special(char *s, const environment *env) -{ - if (s != 0) { - if (is_graphic_start(s)) { - graphic_level++; - if (graphic_level == 1) { - page_contents->is_in_graphic = TRUE; // add words and lines to temporary region lists - } - } else if (is_graphic_end(s) && (graphic_level > 0)) { - graphic_level--; - if (graphic_level == 0) { - flush_graphic(); - } - } else if (strncmp(s, "html:", 5) == 0) { - int r=font::res; // resolution of the device - char buf[MAX_STRING_LENGTH]; - font *f=sbuf_style.f; - - if (f == NULL) { - int found=FALSE; - - f = font::load_font("TR", &found); - } - str_translate_to_html(f, buf, MAX_STRING_LENGTH, - &s[5], strlen(s)-5, FALSE); - page_contents->add_html_command(&sbuf_style, buf, strlen(buf), - - // need to pass rest of string through to html output during flush - - env->vpos-env->size*r/72, env->hpos, - env->vpos , env->hpos); - // assume that the html command has no width, if it does then we hopefully troff - // will have fudged this in a macro and requested that the formatting move right by - // the appropriate width - } else if (strncmp(s, "index:", 6) == 0) { - cutoff_heading = atoi(&s[6]); - } - } -} - -void set_image_type (char *type) -{ - if (strcmp(type, "gif") == 0) { - image_type = gif; - } else if (strcmp(type, "png") == 0) { - image_type = png; - image_device = "png256"; - } else if (strncmp(type, "png", 3) == 0) { - image_type = png; - image_device = type; - } -} - -printer *make_printer() -{ - return new html_printer; -} - -static void usage(); - -int main(int argc, char **argv) -{ - program_name = argv[0]; - static char stderr_buf[BUFSIZ]; - setbuf(stderr, stderr_buf); - int c; - while ((c = getopt(argc, argv, "F:atTvdgmx?I:r:")) != EOF) - switch(c) { - case 'v': - { - extern const char *Version_string; - fprintf(stderr, "grohtml version %s\n", Version_string); - fflush(stderr); - break; - } - case 'a': - auto_on = FALSE; - break; - case 't': - table_on = FALSE; - break; - case 'T': - table_image_on = FALSE; - break; - case 'F': - font::command_line_font_dir(optarg); - break; - case 'I': - // user specifying the type of images we should generate - set_image_type(optarg); - break; - case 'r': - // resolution (dots per inch for an image) - image_res = atoi(optarg); - break; - case 'd': - // debugging on - debug_on = TRUE; - break; - case 'x': - debug_table_on = TRUE; - break; - case 'g': - // do not guess title and headings - guess_on = FALSE; - break; - case 'm': - // leave margins alone - margin_on = TRUE; - break; - case '?': - usage(); - break; - default: - assert(0); - } - if (optind >= argc) { - do_file("-"); - } else { - for (int i = optind; i < argc; i++) - do_file(argv[i]); - } - delete pr; - return 0; -} - -static void usage() -{ - fprintf(stderr, "usage: %s [-avdgmt?] [-r resolution] [-F dir] [-I imagetype] [files ...]\n", - program_name); - exit(1); -} |