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/*
* psgen.c
* routines for the postscript generation
*
* Copyright (c) 1988-1993 Miguel Santana
* Copyright (c) 1995-1999 Akim Demaille, Miguel Santana
*/
/*
* This file is part of a2ps.
*
* This program 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 3, or (at your option)
* any later version.
*
* This program 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 this program; see the file COPYING. If not, write to
* the Free Software Foundation, 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
/*
* $Id: psgen.c,v 1.1.1.1.2.1 2007/12/29 01:58:22 mhatta Exp $
*/
#include "a2ps.h" /* most global variables */
#include "prolog.h"
#include "psgen.h"
#include "routines.h" /* general interest routines */
#include "output.h" /* Diverted outputs */
#include "media.h"
#include "faces.h"
#include "metaseq.h"
#include "message.h"
#include "fonts.h"
#include "dsc.h"
#include "jobs.h"
#include "fjobs.h"
#include "prange.h"
#define PRINT_HEADER \
(!IS_EMPTY(job->header))
#define PRINT_FOOTER \
(!IS_EMPTY(job->footer) \
|| !IS_EMPTY(job->left_footer) \
|| !IS_EMPTY(job->right_footer))
#define PRINT_TITLE \
(!IS_EMPTY(job->center_title) \
|| !IS_EMPTY(job->left_title) \
|| !IS_EMPTY(job->right_title))
/* Width in characters for line prefix */
#define prefix_size (job->numbering ? 5 : 0)
/* Is this the first page for the current file? */
#define is_first_page \
((job->pages - CURRENT_FILE (job)->first_page) > 1)
#define jdiv job->divertion
/* return the max of two >-comparable stuff */
#define A2_MAX(X,Y) (((X) > (Y)) ? (X) : (Y))
/****************************************************************/
/* Formating help routines */
/****************************************************************/
/*
* Print a char in a form accepted by postscript printers.
* Returns number of columns used (on the output) to print the char.
*/
static int
ps_escape_char (a2ps_job * job, uchar c, uchar * res)
{
int len=0;
/* The number of columns used must be calculated here because of the
* \ before non-ascii chars, and (, ), and \ itself */
/* Printable and 7bit clean caracters */
if (' ' <= c && c < 0177) {
if (c == '(' || c == ')' || c == '\\')
USTRCCAT(res, '\\');
USTRCCAT(res, c);
return 1;
}
/* Printable, but not 7bit clean caracters */
if (encoding_char_exists (job->encoding, job->status->face, c)
&& ((0177 < c) || (c < 040))) {
sprintf ((char *)res, "%s\\%o", res, c);
return 1;
}
/* We are dealing with a non-printing character */
job->status->nonprinting_chars++;
/* We do this in here for speed. We could have first escaped, then
consider the new string as the string to ps-escape. */
switch (job->unprintable_format) {
case octal:
sprintf ((char *) res, "\\\\%03o", c);
return 4;
case hexa:
sprintf ((char *) res, "\\\\x%02x", c);
return 4;
case question_mark:
USTRCCAT (res, '?');
return 1;
case space:
USTRCCAT (res, ' ');
return 1;
case caret:
if (0177 < c) {
ustrcat(res, "M-");
len += 2;
c &= 0177;
}
if (c < ' ') {
USTRCCAT(res, '^');
len += 2;
c += '@';
if (c == '(' || c == ')' || c == '\\')
USTRCCAT(res, '\\');
USTRCCAT(res, c);
} else if (c == 0177) {
ustrcat(res, "^?");
len += 2;
} else {
if (c == '(' || c == ')' || c == '\\')
USTRCCAT(res, '\\');
USTRCCAT(res, c);
len++;
}
return len;
case Emacs:
if (0177 < c) {
ustrcat(res, "M-");
len += 2;
c &= 0177;
}
if (c < ' ') {
ustrcat (res, "C-");
len += 3;
c += '@';
if (c == '(' || c == ')' || c == '\\')
USTRCCAT(res, '\\');
USTRCCAT(res, c);
} else if (c == 0177) {
ustrcat(res, "C-?");
len += 3;
} else {
if (c == '(' || c == ')' || c == '\\')
USTRCCAT(res, '\\');
USTRCCAT(res, c);
len++;
}
return len;
}
return 0;
}
/*
* Print a string in a form accepted by postscript printers.
*/
static int
ps_escape_string (a2ps_job * job, uchar * string, uchar * res)
{
size_t i;
int delta_column=0;
for (i = 0 ; i < ustrlen (string) ; i++)
delta_column += ps_escape_char (job, string[i], res);
return delta_column;
}
/*
* Output the formated marker.
*/
static void
output_marker (a2ps_job * job, const char * kind, uchar * marker)
{
uchar *cp, buf[256];
int i;
cp = expand_user_string (job, CURRENT_FILE (job),
(const uchar *) kind, marker);
for (i = 0 ; cp[i] ; i++) {
switch (cp[i]) {
case FILE_LAST_PAGE:
output_delayed_int (jdiv, &(CURRENT_FILE (job)->last_page));
break;
case FILE_LAST_SHEET:
output_delayed_int (jdiv, &(CURRENT_FILE (job)->last_sheet));
break;
case FILE_NB_PAGES:
output_delayed_int (jdiv, &(CURRENT_FILE (job)->pages));
break;
case FILE_NB_SHEETS:
output_delayed_int (jdiv, &(CURRENT_FILE (job)->sheets));
break;
case FILE_NB_LINES:
output_delayed_int (jdiv, &(CURRENT_FILE (job)->lines));
break;
case JOB_NB_PAGES:
output_delayed_int (jdiv, &job->pages);
break;
case JOB_NB_SHEETS:
output_delayed_int (jdiv, &job->sheets);
break;
case JOB_NB_FILES:
output_delayed_int (jdiv, &job->total_files);
break;
default:
*buf = '\0';
ps_escape_char (job, cp[i], buf);
output (jdiv, (char *) buf);
break;
}
}
}
/****************************************************************/
/* Dealing with the encodings */
/****************************************************************/
/*
* Change the current encoding
*/
void
ps_set_encoding (a2ps_job * job, struct encoding * enc)
{
set_encoding (job, enc);
job->status->opened_encoding = enc;
output (jdiv, "%sdict begin\n", encoding_get_key (enc));
}
void
ps_end_encoding (a2ps_job * job)
{
if (job->status->opened_encoding)
output (jdiv, "end %% of %sdict\n",
encoding_get_key (job->status->opened_encoding));
set_encoding (job, NULL);
job->status->opened_encoding = NULL;
}
/*
* Switch of encoding while we are _not_ in the body. E.g., we
* are dealing with the headers.
*
* We want to save the previous encoding, because, say we
* were printing -X latin1, we have switched to latin2 dynamically.
* Right now, we need to change page,
* so we are using back latin1, but we must remember of latin2
* for the following page.
*/
static void
ps_internal_switch_encoding (a2ps_job * job, struct encoding * enc)
{
if (job->encoding != enc) {
/* If there are no dictionary opened yet, it is because we are
* changing of dict outside the text body (e.g. even before
* the first output char). In this case, do not open a
* ps dict: it is not time yet.
*/
if (job->status->opened_encoding) {
ps_end_encoding (job);
ps_set_encoding (job, enc);
} else {
ps_end_encoding (job);
set_encoding (job, enc);
}
/* Make sure to re-declare the font */
job->status->face_declared = false;
}
}
/*
* Switch the encoding during the print process (ie. from
* within the body of the text)
* We have to take care of closing the line currently being printed
* and restore the state, i.e. opening a string to print.
*/
void
ps_switch_encoding (a2ps_job * job, struct encoding * enc)
{
if (job->encoding != enc)
{
if (!job->status->start_line) {
if (!job->status->face_declared)
output (jdiv, ") %s\n", face_eo_ps (job->status->face));
else
output (jdiv, ") S\n");
}
ps_internal_switch_encoding (job, enc);
job->saved_encoding = enc;
if (!job->status->start_line)
output_char (jdiv, '(');
}
}
static void
ps_push_encoding (a2ps_job * job, struct encoding * enc)
{
job->saved_encoding = job->encoding;
ps_internal_switch_encoding (job, enc);
}
static void
ps_pop_encoding (a2ps_job * job)
{
ps_internal_switch_encoding (job, job->saved_encoding);
}
/****************************************************************/
/* Printing a physical page */
/****************************************************************/
/*
* Print the prolog necessary for printing each physical page.
* Adobe convention for page independence is enforced through this routine.
* Note that is may called for a second time on a single sheet if two
* different files are printed on the same sheet.
*/
static void
page_begin (a2ps_job * job)
{
job->virtual = 1;
if (print_page (job, job->pages))
job->sheets++;
/* The number of pages has not been updated yet: add 1 */
CURRENT_FILE (job)->top_page = CURRENT_FILE (job)->pages + 1;
/*
* Getting ready to delay the page label
* This means to build a new string handler, store it, and fill it later
* We do this because one would like to have all the information on
* what is on the current page before making the page label.
*/
if (!output_is_to_void (jdiv))
{
output (jdiv, "%%%%Page: (");
job->status->page_label = XMALLOC (uchar *, 1);
output_delayed_string (jdiv, job->status->page_label);
output (jdiv, ") %d\n", job->sheets);
}
/* Reinitialize state variables for each new sheet */
output (jdiv, "%%%%BeginPageSetup\n");
output (jdiv, "/pagesave save def\n");
/* Shift front side sheets */
if (job->margin
&& (job->duplex == simplex || (job->sheets % 2)))
output (jdiv, "%d 0 translate\n", job->margin);
if (job->orientation == landscape)
output (jdiv, "sh 0 translate 90 rotate\n");
output (jdiv, "%%%%EndPageSetup\n");
if (job->debug)
output (jdiv, "\
%% Display the bounding box\n\
gsave\n\
llx lly moveto\n\
2 setlinewidth\n\
0.9 setgray\n\
urx lly lineto\n\
urx ury lineto\n\
llx ury lineto\n\
closepath stroke\n\
grestore\n\n");
/* Set the encoding */
ps_set_encoding (job, job->requested_encoding);
/* water marks (only once per sheet) */
if (!IS_EMPTY(job->water))
{
output_char (jdiv, '(');
output_marker (job, "water mark", job->water);
output (jdiv,
") %4.2f water\n",
((float) atan2 ((double) job->medium->w - job->margin,
(double) job->medium->h)
/ 3.14159265 * 180));
}
/* Move to the lower left point of the drawable area */
output (jdiv, "gsave\n");
output (jdiv, "llx lly %d add translate\n",
PRINT_FOOTER * HEADERS_H);
/* Set the encoding */
ps_internal_switch_encoding (job, job->saved_encoding);
}
/* The job on the page is over: puts the headers and footers,
* then print the physical page.
*/
static void
page_end (a2ps_job * job)
{
/* The page label has been divertered (through a handler).
* Fill that handler with the correct page label value
*/
*(job->status->page_label) =
xustrdup (expand_user_string (job, CURRENT_FILE (job),
(const uchar *) "Page label",
job->status->page_label_format));
output (jdiv, "grestore\n");
/* All the headers should be written using the requested encoding */
ps_push_encoding (job, job->requested_encoding);
/* Print the right header */
if (PRINT_HEADER) {
output_char (jdiv, '(');
output_marker (job, "right header", job->header);
output (jdiv, ") rhead\n");
}
/* Print the center footer.
* Use dynamic markers in priority
*/
if (PRINT_FOOTER) {
if (!IS_EMPTY(job->footer)) {
output_char (jdiv, '(');
output_marker (job, "center footer", job->footer);
output (jdiv, ") ");
} else
output (jdiv, "() ");
/* Print the right footer */
if (!IS_EMPTY(job->right_footer)) {
output_char (jdiv, '(');
output_marker (job, "right footer", job->right_footer);
output (jdiv, ") ");
} else
output (jdiv, "() ");
/* Print the left footer */
if (!IS_EMPTY(job->left_footer)) {
output_char (jdiv, '(');
output_marker (job, "left footer", job->left_footer);
output (jdiv, ") ");
}
else
output (jdiv, "() ");
output (jdiv, "footer\n");
}
/* Close the current encoding */
ps_end_encoding (job);
output (jdiv, "pagesave restore\n");
output (jdiv, "showpage\n");
job->virtual = 0;
}
/****************************************************************/
/* Printing a virtual page */
/****************************************************************/
/*
* Prints page header and page border and
* initializes printing of the file lines.
*/
static void
virtual_begin (a2ps_job * job)
{
job->pages++;
if (print_page (job, job->pages)) {
output_to_void (jdiv, false);
job->virtual++;
} else {
output_to_void (jdiv, true);
}
/* We test to one, since it has just been incremented above */
if (job->virtual == 1)
page_begin (job);
if (!job->encoding)
ps_set_encoding (job, job->saved_encoding);
file_job_synchronize_pages (job);
file_job_synchronize_sheets (job);
output (jdiv, "/v %d store\n", job->virtual - 1);
output (jdiv, "/x0 x v get %f add sx cw mul add store\n",
SIDE_MARGIN_RATIO * job->fontsize * 0.6);
output (jdiv, "/y0 y v get bfs %s sub store\n",
PRINT_TITLE ? "th add" : "");
output (jdiv, "x0 y0 moveto\n");
}
/*
* Adds a sheet number to the page (footnote) and prints the formatted
* page (physical impression). Activated at the end of each source page.
*/
static void
virtual_end (a2ps_job * job)
{
/*
* Print the titles with the option-given encoding
*/
/* Draw the header and its content */
if (PRINT_TITLE) {
ps_push_encoding (job, job->requested_encoding);
if (!IS_EMPTY(job->center_title)) {
output_char (jdiv, '(');
output_marker (job, "center title", job->center_title);
output (jdiv, ") ");
} else
output (jdiv, "() ");
if (!IS_EMPTY(job->right_title)) {
output_char (jdiv, '(');
output_marker (job, "right title", job->right_title);
output (jdiv, ") ");
} else
output (jdiv, "() ");
if (!IS_EMPTY(job->left_title)) {
output_char (jdiv, '(');
output_marker (job, "left title", job->left_title);
output (jdiv, ") ");
} else
output (jdiv, "() ");
output (jdiv, "title\n");
ps_pop_encoding (job);
}
if (job->border)
output (jdiv, "border\n");
if (job->virtual == (job->columns * job->rows))
page_end (job);
job->status->line = 0;
}
/* Issue an empty virtual (used for file alignment). */
static void
virtual_empty_output (a2ps_job *job)
{
/* Let's use a hidden option which lets choose between an empty
virtual (with headers etc.), or nothing printed at all. */
if (macro_meta_sequence_get (job, VAR_OPT_VIRTUAL_FORCE))
{
virtual_begin (job);
virtual_end (job);
}
else
{
/* Just increase the virtual number, that's enough. */
job->pages++;
job->virtual++;
if (job->virtual == (job->columns * job->rows))
page_end (job);
}
}
/*
* Flush the (physical) page, ready for new page
* Used
* -- at the end of the whole job
* -- at the end of a page
* -- when a fresh page is required (eg, when after an a2ps
* generated ps page arrives a delegated ps file)
*/
void
page_flush (a2ps_job * job)
{
/* Everything that follows _must_ be dumped */
output_to_void (job->divertion, false);
/* If the sheet has not been printed, flush it */
if (job->virtual != 0)
page_end (job);
}
/* Output an empty page (used for instance to align files.
No page should be waiting (issue flushes before). */
static void
page_empty_output (a2ps_job *job)
{
job->sheets++;
file_job_synchronize_sheets (job);
output (jdiv, "%%%%Page: (*) %d\n", job->sheets);
output (jdiv, "%% Empty Page\n");
output (jdiv, "showpage\n");
}
static void
sheet_flush (a2ps_job *job)
{
page_flush (job);
/* Need an empty back side? */
if ((job->duplex == duplex || job->duplex == tumble)
&& (job->sheets % 2) != 0)
page_empty_output (job);
}
/*
* Make sure this a new sheet.
* No DSC is done on the new page. This is used when delegated
* ps file is inlined.
*/
void
require_fresh_page (a2ps_job * job)
{
/* If this is not a blank sheet, end it */
if (job->virtual != 0)
/* The clean up _must_ be done */
page_flush (job);
}
/****************************************************************/
/* Service routines */
/****************************************************************/
/*
* Test if we have a binary file.
*
* Printing binary files is not very useful. We stop printing
* if we detect one of these files. Our heuristic to detect them:
* if 40% characters are non-printing characters,
* the file is a binary file. (40% is taken from the case of a2ps istself).
*/
static void
check_binary_file (a2ps_job * job)
{
if (job->status->chars > 120)
{
if (!job->print_binaries
&& (job->status->nonprinting_chars*100 / job->status->chars) >= 40)
error (1, 0, _("`%s' is a binary file, printing aborted"),
CURRENT_FILE (job)->name);
}
}
static inline void
end_of_line (struct a2ps_job * job)
{
if (!job->status->face_declared) {
output (jdiv, ") %s n\n", face_eo_ps (job->status->face));
job->status->face_declared = true;
} else
output (jdiv, ") N\n");
job->status->line++;
job->status->column = 0;
job->status->wx = 0;
}
#define page_full \
(job->status->line >= job->status->linesperpage)
#define line_full (job->status->wx > job->status->wxperline)
/*
* Fold a line too long.
*/
static inline void
fold_line (struct a2ps_job * job, enum face_e new_face)
{
job->lines_folded++;
end_of_line (job);
if (page_full)
{
virtual_end (job);
virtual_begin (job);
job->status->face_declared = false ;
}
if (job->numbering)
{
output (jdiv, "0 T (");
}
else
{
/* This is a new line, hence we can consider that there is no
need to close the current font: just consider it is the new
font, but not declared. */
output_char (jdiv, '(');
job->status->face_declared &= (job->status->face
== new_face);
job->status->face = new_face;
}
}
/*
* Print a char
*/
void
ps_print_char (a2ps_job * job, int c, enum face_e new_face)
{
/*
* Preprocessing (before printing):
* - TABs expansion (see interpret option)
* - FF and BS interpretation
* - replace non printable characters by a space or a char sequence
* like:
* ^X for ascii codes < 0x20 (X = [@, A, B, ...])
* ^? for del char
* M-c for ascii codes > 0x3f
* - prefix parents and backslash ['(', ')', '\'] by backslash
* (escape character in postcript)
*/
if (job->status->is_in_cut
&& (c != '\f' )
/* FIXME: May be some day, using a more flexible scheme
* would be good
&& (c != encodings[job->encoding].new_line))*/
&& (c != '\n'))
return;
job->status->is_in_cut = false;
/* Start a new line ? */
if (job->status->start_line)
{
if (job->status->start_page)
{
/* only if there is something to print! */
virtual_begin (job);
job->status->start_page = false ;
/* This is the first line of a new page, hence we need (page
* independance) to repeat the current font */
job->status->face = new_face;
job->status->face_declared = false;
if (job->numbering)
{
if (CURRENT_FILE (job)->lines % job->numbering == 0)
output (jdiv, "(%d) # (", CURRENT_FILE (job)->lines);
else
output (jdiv, "0 T (");
}
else
output_char (jdiv, '(');
}
else
{
/* This is a new line, but not the first in the page */
if (job->numbering)
{
if (CURRENT_FILE (job)->lines % job->numbering == 0)
output (jdiv, "(%d) # (", CURRENT_FILE (job)->lines);
else
output (jdiv, "0 T (");
}
else
{
/* This is a new line, hence we can consider that there is
no need to close the current font: just consider it is
the new font, but not declared. */
output_char (jdiv, '(');
/* Why the hell did I do this? */
/* FIXME: This is suppresed because of the changes of encoding */
job->status->face_declared = (job->status->face_declared
&& (job->status->face == new_face));
job->status->face = new_face;
}
}
job->status->start_line = false;
}
/*
* Interpret each character
*
* One of the tricky stuff is that we want to avoid uncessary
* Changes of font. For instance, I see no point in
* Updating the font right before a \n.
*/
switch (c) {
case '\f': /* Form feed */
if (!job->interpret)
goto print;
/* Close current line */
if (!job->status->start_line)
{
end_of_line (job);
job->status->start_line = true;
}
/* start a new page ? */
if (job->status->start_page)
{
virtual_begin (job);
}
/* Close current page and begin another */
virtual_end (job);
job->status->start_page = true;
break;
case '\n':
#if 0
/* Now the primary eol is \n. It is up to a2ps-prog to change the
* \r or \n\r to \n
* The program */
case '\r': /* One of these is just a plain character */
if (c != encodings[job->encoding].new_line)
goto print;
#endif
(CURRENT_FILE (job))->lines++;
job->status->start_line = true;
end_of_line (job);
if (page_full) {
virtual_end (job);
job->status->start_page = true ;
}
break;
case '\t':
if (!job->interpret)
goto print;
/* Is this a new font? */
if (job->status->face != new_face) {
if (!job->status->face_declared)
output (jdiv, ") %s\n(", face_eo_ps (job->status->face));
else
output (jdiv, ") S\n(");
job->status->face = new_face;
job->status->face_declared = false;
}
/* Tabs are interpreted but we want to go to the same
* column as if the font were Courier
*/
job->status->column =
(A2_MAX(job->status->wx / COURIER_WX, job->status->column)
/ job->tabsize + 1) * job->tabsize;
job->status->wx = job->status->column * COURIER_WX;
if (line_full) {
if (job->folding) {
fold_line (job, new_face);
} else {
job->status->is_in_cut = true;
return;
}
}
/* Make sure that the font is given */
if (!job->status->face_declared) {
output (jdiv, ") %s", face_eo_ps(job->status->face));
job->status->face_declared = true;
} else
output (jdiv, ") S");
output (jdiv, " %d T (", job->status->column);
break;
print:
default:
{
uchar buf[256];
int nchars;
*buf = '\0';
/* Is this a new font? */
if (job->status->face != new_face) {
if (!job->status->face_declared)
output (jdiv, ") %s\n(", face_eo_ps (job->status->face));
else
output (jdiv, ") S\n(");
job->status->face = new_face;
job->status->face_declared = false;
}
nchars = ps_escape_char (job, c, buf);
job->status->wx += char_WX (job, c);
job->status->column += nchars;
if (line_full) {
if (job->folding) {
fold_line (job, new_face);
job->status->column = nchars;
job->status->wx = char_WX (job, c);
} else {
job->status->is_in_cut = true;
return;
}
}
output (jdiv, "%s", buf);
job->status->chars++;
}
break;
}
}
/*
* Print the content of a C string \0 terminated
*/
void
ps_print_string (a2ps_job * job, uchar * string, enum face_e face)
{
while (*string)
ps_print_char (job, *(string++), face);
}
/*
* Print the N first chars in BUFFER
*/
void
ps_print_buffer (a2ps_job * job,
const uchar * buffer,
size_t start, size_t end,
enum face_e face)
{
size_t i;
for (i = start ; i < end ; i++)
ps_print_char (job, buffer [i], face);
}
/* Handling the input sessions in an output session, i.e., typically
the files. */
/* A new file will be printed. */
void
ps_begin_file (a2ps_job *job)
{
/* Reinitialize the ps status */
initialize_ps_status (job->status);
/* Alignment is not needed for the first file. */
if (job->jobs->len == 0)
return;
switch (job->file_align)
{
case file_align_virtual:
/* Nothing to do. */
break;
case file_align_rank:
/* Issue virtual until we are in a new rank. */
{
int alignment = job->madir == madir_rows ? job->columns : job->rows;
while (job->pages % alignment != 0)
virtual_empty_output (job);
}
break;
case file_align_page:
/* End the page if needed. */
page_flush (job);
break;
case file_align_sheet:
/* End the sheet if needed. */
sheet_flush (job);
break;
default:
/* job->file_align is a number. We must issue as many pages as
needed to have a page number which is a multiple of
FILE_ALIGN plus one. */
page_flush (job);
while ((job->sheets) % job->file_align != 0)
page_empty_output (job);
break;
}
}
void
ps_end_file (a2ps_job *job)
{
/* If a line was not finished, close it.
* Typically, no \n at end of file */
if (!job->status->start_line)
{
if (!job->status->face_declared)
output (jdiv, ") %s\n", face_eo_ps (job->status->face));
else
output (jdiv, ") S\n");
}
if (!job->status->start_page)
virtual_end (job);
/* Set the number of pages/sheets printed */
file_job_synchronize_pages (job);
file_job_synchronize_sheets (job);
/* If we don't want to print binaries, complain and quit */
check_binary_file (job);
}
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