Mercurial > hg > xemacs-beta
view lisp/printer.el @ 665:fdefd0186b75
[xemacs-hg @ 2001-09-20 06:28:42 by ben]
The great integral types renaming.
The purpose of this is to rationalize the names used for various
integral types, so that they match their intended uses and follow
consist conventions, and eliminate types that were not semantically
different from each other.
The conventions are:
-- All integral types that measure quantities of anything are
signed. Some people disagree vociferously with this, but their
arguments are mostly theoretical, and are vastly outweighed by
the practical headaches of mixing signed and unsigned values,
and more importantly by the far increased likelihood of
inadvertent bugs: Because of the broken "viral" nature of
unsigned quantities in C (operations involving mixed
signed/unsigned are done unsigned, when exactly the opposite is
nearly always wanted), even a single error in declaring a
quantity unsigned that should be signed, or even the even more
subtle error of comparing signed and unsigned values and
forgetting the necessary cast, can be catastrophic, as
comparisons will yield wrong results. -Wsign-compare is turned
on specifically to catch this, but this tends to result in a
great number of warnings when mixing signed and unsigned, and
the casts are annoying. More has been written on this
elsewhere.
-- All such quantity types just mentioned boil down to EMACS_INT,
which is 32 bits on 32-bit machines and 64 bits on 64-bit
machines. This is guaranteed to be the same size as Lisp
objects of type `int', and (as far as I can tell) of size_t
(unsigned!) and ssize_t. The only type below that is not an
EMACS_INT is Hashcode, which is an unsigned value of the same
size as EMACS_INT.
-- Type names should be relatively short (no more than 10
characters or so), with the first letter capitalized and no
underscores if they can at all be avoided.
-- "count" == a zero-based measurement of some quantity. Includes
sizes, offsets, and indexes.
-- "bpos" == a one-based measurement of a position in a buffer.
"Charbpos" and "Bytebpos" count text in the buffer, rather than
bytes in memory; thus Bytebpos does not directly correspond to
the memory representation. Use "Membpos" for this.
-- "Char" refers to internal-format characters, not to the C type
"char", which is really a byte.
-- For the actual name changes, see the script below.
I ran the following script to do the conversion. (NOTE: This script
is idempotent. You can safely run it multiple times and it will
not screw up previous results -- in fact, it will do nothing if
nothing has changed. Thus, it can be run repeatedly as necessary
to handle patches coming in from old workspaces, or old branches.)
There are two tags, just before and just after the change:
`pre-integral-type-rename' and `post-integral-type-rename'. When
merging code from the main trunk into a branch, the best thing to
do is first merge up to `pre-integral-type-rename', then apply the
script and associated changes, then merge from
`post-integral-type-change' to the present. (Alternatively, just do
the merging in one operation; but you may then have a lot of
conflicts needing to be resolved by hand.)
Script `fixtypes.sh' follows:
----------------------------------- cut ------------------------------------
files="*.[ch] s/*.h m/*.h config.h.in ../configure.in Makefile.in.in ../lib-src/*.[ch] ../lwlib/*.[ch]"
gr Memory_Count Bytecount $files
gr Lstream_Data_Count Bytecount $files
gr Element_Count Elemcount $files
gr Hash_Code Hashcode $files
gr extcount bytecount $files
gr bufpos charbpos $files
gr bytind bytebpos $files
gr memind membpos $files
gr bufbyte intbyte $files
gr Extcount Bytecount $files
gr Bufpos Charbpos $files
gr Bytind Bytebpos $files
gr Memind Membpos $files
gr Bufbyte Intbyte $files
gr EXTCOUNT BYTECOUNT $files
gr BUFPOS CHARBPOS $files
gr BYTIND BYTEBPOS $files
gr MEMIND MEMBPOS $files
gr BUFBYTE INTBYTE $files
gr MEMORY_COUNT BYTECOUNT $files
gr LSTREAM_DATA_COUNT BYTECOUNT $files
gr ELEMENT_COUNT ELEMCOUNT $files
gr HASH_CODE HASHCODE $files
----------------------------------- cut ------------------------------------
`fixtypes.sh' is a Bourne-shell script; it uses 'gr':
----------------------------------- cut ------------------------------------
#!/bin/sh
# Usage is like this:
# gr FROM TO FILES ...
# globally replace FROM with TO in FILES. FROM and TO are regular expressions.
# backup files are stored in the `backup' directory.
from="$1"
to="$2"
shift 2
echo ${1+"$@"} | xargs global-replace "s/$from/$to/g"
----------------------------------- cut ------------------------------------
`gr' in turn uses a Perl script to do its real work,
`global-replace', which follows:
----------------------------------- cut ------------------------------------
: #-*- Perl -*-
### global-modify --- modify the contents of a file by a Perl expression
## Copyright (C) 1999 Martin Buchholz.
## Copyright (C) 2001 Ben Wing.
## Authors: Martin Buchholz <martin@xemacs.org>, Ben Wing <ben@xemacs.org>
## Maintainer: Ben Wing <ben@xemacs.org>
## Current Version: 1.0, May 5, 2001
# 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 2, 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 XEmacs; see the file COPYING. If not, write to the Free
# Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
# 02111-1307, USA.
eval 'exec perl -w -S $0 ${1+"$@"}'
if 0;
use strict;
use FileHandle;
use Carp;
use Getopt::Long;
use File::Basename;
(my $myName = $0) =~ s@.*/@@; my $usage="
Usage: $myName [--help] [--backup-dir=DIR] [--line-mode] [--hunk-mode]
PERLEXPR FILE ...
Globally modify a file, either line by line or in one big hunk.
Typical usage is like this:
[with GNU print, GNU xargs: guaranteed to handle spaces, quotes, etc.
in file names]
find . -name '*.[ch]' -print0 | xargs -0 $0 's/\bCONST\b/const/g'\n
[with non-GNU print, xargs]
find . -name '*.[ch]' -print | xargs $0 's/\bCONST\b/const/g'\n
The file is read in, either line by line (with --line-mode specified)
or in one big hunk (with --hunk-mode specified; it's the default), and
the Perl expression is then evalled with \$_ set to the line or hunk of
text, including the terminating newline if there is one. It should
destructively modify the value there, storing the changed result in \$_.
Files in which any modifications are made are backed up to the directory
specified using --backup-dir, or to `backup' by default. To disable this,
use --backup-dir= with no argument.
Hunk mode is the default because it is MUCH MUCH faster than line-by-line.
Use line-by-line only when it matters, e.g. you want to do a replacement
only once per line (the default without the `g' argument). Conversely,
when using hunk mode, *ALWAYS* use `g'; otherwise, you will only make one
replacement in the entire file!
";
my %options = ();
$Getopt::Long::ignorecase = 0;
&GetOptions (
\%options,
'help', 'backup-dir=s', 'line-mode', 'hunk-mode',
);
die $usage if $options{"help"} or @ARGV <= 1;
my $code = shift;
die $usage if grep (-d || ! -w, @ARGV);
sub SafeOpen {
open ((my $fh = new FileHandle), $_[0]);
confess "Can't open $_[0]: $!" if ! defined $fh;
return $fh;
}
sub SafeClose {
close $_[0] or confess "Can't close $_[0]: $!";
}
sub FileContents {
my $fh = SafeOpen ("< $_[0]");
my $olddollarslash = $/;
local $/ = undef;
my $contents = <$fh>;
$/ = $olddollarslash;
return $contents;
}
sub WriteStringToFile {
my $fh = SafeOpen ("> $_[0]");
binmode $fh;
print $fh $_[1] or confess "$_[0]: $!\n";
SafeClose $fh;
}
foreach my $file (@ARGV) {
my $changed_p = 0;
my $new_contents = "";
if ($options{"line-mode"}) {
my $fh = SafeOpen $file;
while (<$fh>) {
my $save_line = $_;
eval $code;
$changed_p = 1 if $save_line ne $_;
$new_contents .= $_;
}
} else {
my $orig_contents = $_ = FileContents $file;
eval $code;
if ($_ ne $orig_contents) {
$changed_p = 1;
$new_contents = $_;
}
}
if ($changed_p) {
my $backdir = $options{"backup-dir"};
$backdir = "backup" if !defined ($backdir);
if ($backdir) {
my ($name, $path, $suffix) = fileparse ($file, "");
my $backfulldir = $path . $backdir;
my $backfile = "$backfulldir/$name";
mkdir $backfulldir, 0755 unless -d $backfulldir;
print "modifying $file (original saved in $backfile)\n";
rename $file, $backfile;
}
WriteStringToFile ($file, $new_contents);
}
}
----------------------------------- cut ------------------------------------
In addition to those programs, I needed to fix up a few other
things, particularly relating to the duplicate definitions of
types, now that some types merged with others. Specifically:
1. in lisp.h, removed duplicate declarations of Bytecount. The
changed code should now look like this: (In each code snippet
below, the first and last lines are the same as the original, as
are all lines outside of those lines. That allows you to locate
the section to be replaced, and replace the stuff in that
section, verifying that there isn't anything new added that
would need to be kept.)
--------------------------------- snip -------------------------------------
/* Counts of bytes or chars */
typedef EMACS_INT Bytecount;
typedef EMACS_INT Charcount;
/* Counts of elements */
typedef EMACS_INT Elemcount;
/* Hash codes */
typedef unsigned long Hashcode;
/* ------------------------ dynamic arrays ------------------- */
--------------------------------- snip -------------------------------------
2. in lstream.h, removed duplicate declaration of Bytecount.
Rewrote the comment about this type. The changed code should
now look like this:
--------------------------------- snip -------------------------------------
#endif
/* The have been some arguments over the what the type should be that
specifies a count of bytes in a data block to be written out or read in,
using Lstream_read(), Lstream_write(), and related functions.
Originally it was long, which worked fine; Martin "corrected" these to
size_t and ssize_t on the grounds that this is theoretically cleaner and
is in keeping with the C standards. Unfortunately, this practice is
horribly error-prone due to design flaws in the way that mixed
signed/unsigned arithmetic happens. In fact, by doing this change,
Martin introduced a subtle but fatal error that caused the operation of
sending large mail messages to the SMTP server under Windows to fail.
By putting all values back to be signed, avoiding any signed/unsigned
mixing, the bug immediately went away. The type then in use was
Lstream_Data_Count, so that it be reverted cleanly if a vote came to
that. Now it is Bytecount.
Some earlier comments about why the type must be signed: This MUST BE
SIGNED, since it also is used in functions that return the number of
bytes actually read to or written from in an operation, and these
functions can return -1 to signal error.
Note that the standard Unix read() and write() functions define the
count going in as a size_t, which is UNSIGNED, and the count going
out as an ssize_t, which is SIGNED. This is a horrible design
flaw. Not only is it highly likely to lead to logic errors when a
-1 gets interpreted as a large positive number, but operations are
bound to fail in all sorts of horrible ways when a number in the
upper-half of the size_t range is passed in -- this number is
unrepresentable as an ssize_t, so code that checks to see how many
bytes are actually written (which is mandatory if you are dealing
with certain types of devices) will get completely screwed up.
--ben
*/
typedef enum lstream_buffering
--------------------------------- snip -------------------------------------
3. in dumper.c, there are four places, all inside of switch()
statements, where XD_BYTECOUNT appears twice as a case tag. In
each case, the two case blocks contain identical code, and you
should *REMOVE THE SECOND* and leave the first.
| author | ben |
|---|---|
| date | Thu, 20 Sep 2001 06:31:11 +0000 |
| parents | 666d73d6ac56 |
| children | a307f9a2021d |
line wrap: on
line source
;;; printer.el --- support for hard-copy printing in XEmacs ;; Copyright (C) 2000 Ben Wing. ;; Copyright (C) 2000 Kirill Katsnelson. ;; Maintainer: XEmacs Development Team ;; Keywords: printer, printing, internal, dumped ;; This file is part of XEmacs. ;; XEmacs 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. ;; XEmacs 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 XEmacs; see the file COPYING. If not, write to the Free ;; Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA ;; 02111-1307, USA. ;;; Synched up with: Not in FSF. ;;; Authorship: ;; Created 2000 by Ben Wing, to provide the high-level interface onto the ;; print support implemented by Kirill Katsnelson. ;;; Commentary: ;; This file is dumped with XEmacs. ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; ;; generic printing code ;; ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; ;; #### should be named print-buffer, but that's currently in ;; lpr-buffer with some horrible definition: print-buffer == "print with ;; headings", lpr-buffer == "print without headings", and the headings are ;; generated by calling the external program "pr"! This is major stone-age ;; here! ;; ;; I propose junking that package entirely and creating a unified, ;; modern API here that will work well with modern GUI's on top of it, ;; and with various different actual implementations (e.g. lpr or the ;; pretty-print package on Unix, built-in msprinter support on ;; Windows), where the workings of a particular implementation is ;; hidden from the user and there is a consistent set of options to ;; control how to print, which works across all implementations. ;; ;; The code here currently only really supports Windows. (defgroup printing nil "Generic printing support." :group 'wp) (defcustom printer-name nil "*Name of printer to print to. If nil, use default. Under Windows, use `mswindows-printer-list' to get names of installed printers." :type 'string :group 'printing) (defstruct Print-context pageno window start-time printer-name) (defvar printer-current-device nil) (defun Printer-get-device () (or printer-current-device (setq printer-current-device (make-device 'msprinter printer-name)))) (defun Printer-clear-device () (setq printer-current-device nil)) (defcustom printer-page-header '((face bold date) nil (face bold buffer-name)) "*Controls printed page header. This can be: - nil. Header is not printed. - An fbound symbol or lambda expression. The function is called with one parameter, a print-context object, every time the headers need to be set up. It can use the function `print-context-property' to query the properties of this object. The return value is treated as if it was literally specified: i.e. it will be reprocessed. - A list of up to three elements, for left, center and right portions of the header. Each of these can be - nil, not to print the portion - A string, which will be printed literally. - A predefined symbol, on of the following: printer-name Name of printer being printed to short-file-name File name only, no path long-file-name File name with its path buffer-name Buffer name date Date current when printing started time Time current when printing started page Current printout page number, 1-based user-id User logon id user-name User full name - A list of three elements: (face FACE-NAME EXPR). EXPR is any of the items given here. The item will be displayed in the given face. - A cons of an extent and any of the items given here. The item will be displayed using the extent's face, begin-glyph and end-glyph properties. - A list, each element of which is any of the items given here. Each element of the list is rendered in sequence. For example, '(\"Page \" page) is rendered as \"Page 5\" on the fifth page. - An fbound symbol or lambda expression, called with one parameter, a print-context object, as above. The return value is treated as if it was literally specified: i.e. it will be reprocessed." :type 'sexp :group 'printing) (defcustom printer-page-footer '(nil (face bold ("Page " page))) "*Controls printed page footer. Format is the same as `printer-page-header'." :type 'sexp :group 'printing) (defun generate-header-element (element context) (cond ((null element) nil) ((stringp element) (insert element)) ((memq element '(printer-name short-file-name long-file-name buffer-name date time page user-id user-name)) (insert (print-context-property context element))) ((and (consp element) (eq 'face (car element))) (let ((p (point))) (generate-header-element (third element) context) (let ((x (make-extent p (point)))) (set-extent-face x (second element))))) ((and (consp element) (extentp (car element))) (let ((p (point))) (generate-header-element (cdr element) context) (let ((x (make-extent p (point)))) (set-extent-face x (extent-face (car element))) (set-extent-begin-glyph x (extent-begin-glyph (car element))) (set-extent-end-glyph x (extent-end-glyph (car element)))))) ((listp element) (mapcar #'(lambda (el) (generate-header-element el context)) element)) ((functionp element) (generate-header-element (funcall element context) context)) (t (error 'invalid-argument "Unknown header element" element)))) (defun generate-header-line (spec context) (let* ((left (first spec)) (middle (second spec)) (right (third spec)) (left-start (point)) (middle-start (progn (generate-header-element left context) (point))) (right-start (progn (generate-header-element middle context) (point))) (right-end (progn (generate-header-element right context) (point))) (left-width (- middle-start left-start)) (middle-width (- right-start middle-start)) (right-width (- right-end right-start)) (winwidth (- (window-width (Print-context-window context)) 1)) (spaces1 (max (- (/ (- winwidth middle-width) 2) left-width) 0)) (spaces2 (max (- (- winwidth right-width) (+ left-width spaces1 middle-width)) 0))) (goto-char right-start) (insert-char ?\ spaces2) (goto-char middle-start) (insert-char ?\ spaces1))) (defun print-context-property (print-context prop) "Return property PROP of PRINT-CONTEXT. Valid properties are print-buffer Buffer being printed print-window Window on printer device containing print buffer print-frame Frame on printer device corresponding to current page print-device Device referring to printer print-start-time Time current when printing started (`current-time' format) print-page Current printout page number, 1-based printer-name Name of printer being printed to short-file-name File name only, no path long-file-name File name with its path buffer-name Buffer name date Date current when printing started (as a string) time Time current when printing started (as a string) page Current printout page number, 1-based (as a string) user-id User logon id (as a string) user-name User full name" (let* ((window (Print-context-window print-context)) (pageno (Print-context-pageno print-context)) (start-time (Print-context-start-time print-context)) (printer-name (Print-context-printer-name print-context)) (buffer (window-buffer window))) (case prop (print-buffer buffer) (print-window window) (print-frame (window-frame window)) (print-device (frame-device (window-frame window))) (print-start-time start-time) (print-page pageno) (printer-name printer-name) (short-file-name (let ((name (buffer-file-name buffer))) (if name (file-name-nondirectory name) ""))) (long-file-name (let ((name (buffer-file-name buffer))) (or name ""))) (buffer-name (buffer-name buffer)) (date (format-time-string "%x" start-time)) (time (format-time-string "%X" start-time)) (page (format "%d" pageno)) (user-id (format "%d" (user-uid))) (user-name (format "%d" (user-login-name))) (t (error 'invalid-argument "Unrecognized print-context property" prop))))) (defun generic-page-setup () "Display the Page Setup dialog box. Changes made are recorded internally." (interactive) (let* ((d (Printer-get-device)) (props (condition-case err (make-dialog-box 'page-setup :device d :properties default-msprinter-frame-plist) (error (Printer-clear-device) (signal (car err) (cdr err)))))) (while props (setq default-msprinter-frame-plist (plist-put default-msprinter-frame-plist (car props) (cadr props))) (setq props (cddr props))))) (defun generic-print-buffer (&optional buffer display-print-dialog) "Print buffer BUFFER using a printing method appropriate to the O.S. being run. Under Unix, `lpr' is normally used to spool out a no-frills version of the buffer, or the `ps-print' package is used to pretty-print the buffer to a PostScript printer. Under MS Windows, the built-in printing support is used. If DISPLAY-PRINT-DIALOG is t, the print dialog will first be displayed, allowing the user to select various printing settings \(e.g. which printer to print to, the range of pages, number of copies, modes such landscape/portrait/2-up/4-up [2 or 4 (small!) logical pages per physical page], etc.). At this point the user can cancel the printing operation using the dialog box, and `generic-print-buffer' will not print anything. When called interactively, use a prefix arg to suppress the display of the print dialog box. If BUFFER is nil or omitted, the current buffer is used." (interactive (list nil (not current-prefix-arg))) (let* ((print-region (and (interactive-p) (region-active-p))) (start (if print-region (region-beginning) (point-min buffer))) (end (if print-region (region-end) (point-max buffer)))) (if (or (not (valid-specifier-tag-p 'msprinter)) (not display-print-dialog)) (generic-print-region start end buffer) (let* ((d (Printer-get-device)) (props (condition-case err (make-dialog-box 'print :device d :allow-selection print-region :selected-page-button (if print-region 'selection 'all)) (error (Printer-clear-device) (signal (car err) (cdr err)))))) (and props (let ((really-print-region (eq (plist-get props 'selected-page-button) 'selection))) (generic-print-region (if really-print-region start (point-min buffer)) (if really-print-region end (point-max buffer)) buffer d props))))))) (defun generic-print-region (start end &optional buffer print-device props) "Print region using a printing method appropriate to the O.S. being run. The region between START and END of BUFFER (defaults to the current buffer) is printed. Under Unix, `lpr' is normally used to spool out a no-frills version of the buffer, or the `ps-print' package is used to pretty-print the buffer to a PostScript printer. Under MS Windows, the built-in printing support is used. Optional PRINT-DEVICE is a device, already created, to use to do the printing. This is typically used when this function was invoked from `generic-print-buffer' and it displayed a dialog box. That function created the device, and then the dialog box stuffed it with the user's selections of how the buffer should be printed. PROPS, if given, is typically the plist returned from the call to `make-dialog-box' that displayed the Print box. It contains properties relevant to us when we print. Recognized properties are the same as those in `make-dialog-box': name Printer device name. If omitted, the current system-selected printer will be used. from-page First page to print, 1-based. If omitted, printing starts from the beginning. to-page Last page to print, inclusive, If omitted, printing ends at the end. copies Number of copies to print. If omitted, one copy is printed." (cond ((valid-specifier-tag-p 'msprinter) ;; loop, printing one copy of document per loop. kill and ;; re-create the frame each time so that we eject the piece ;; of paper at the end even if we're printing more than one ;; page per sheet of paper. (let ((copies (plist-get props 'copies 1))) (while (> copies 0) (let (d f header-buffer footer-buffer) (setq buffer (decode-buffer buffer)) (unwind-protect (with-current-buffer buffer (save-restriction (narrow-to-region start end) (setq d (or print-device (Printer-get-device))) (setq f (make-frame (list* 'name (concat (substitute ?_ ?. (buffer-name buffer)) " - XEmacs") '(menubar-visible-p nil has-modeline-p nil default-toolbar-visible-p nil default-gutter-visible-p nil minibuffer none modeline-shadow-thickness 0 vertical-scrollbar-visible-p nil horizontal-scrollbar-visible-p nil)) d)) (let* ((w (frame-root-window f)) (vertdpi (cdr (device-system-metric d 'device-dpi))) (pixel-vertical-clip-threshold (/ vertdpi 2)) (from-page (plist-get props 'from-page 1)) (to-page (plist-get props 'to-page)) (context (make-Print-context :start-time (current-time) ;; #### bogus! we need accessors for ;; print-settings objects. :printer-name (or (plist-get props 'name) printer-name (mswindows-get-default-printer)))) header-window footer-window) (when printer-page-header (let ((window-min-height 2)) (setq header-window w) (setq w (split-window w 2))) (setq header-buffer (generate-new-buffer " *header*")) (set-window-buffer header-window header-buffer)) (when printer-page-footer (let ((window-min-height 2)) (setq footer-window (split-window w (- (window-height w) 2)))) (setq footer-buffer (generate-new-buffer " *footer*")) (set-window-buffer footer-window footer-buffer)) (setf (Print-context-window context) w) (let ((last-end 0) ; bufpos at end of previous page reached-end ; t if we've reached the end of the ; text we're printing (pageno 1)) (set-window-buffer w buffer) (set-window-start w start) ;; loop, printing one page per loop (while (and (not reached-end) ;; stop at end of region of text or ;; outside of ranges of pages given (or (not to-page) (<= pageno to-page))) (setf (Print-context-pageno context) pageno) ;; only actually print the page if it's in the ;; range. (when (>= pageno from-page) (when printer-page-header (with-current-buffer header-buffer (erase-buffer) (generate-header-line printer-page-header context) (goto-char (point-min)) (set-window-start header-window (point-min)))) (when printer-page-footer (with-current-buffer footer-buffer (erase-buffer) (insert "\n") (generate-header-line printer-page-footer context) (goto-char (point-min)) (set-window-start footer-window (point-min)))) (redisplay-frame f t) (print-job-eject-page f) ) ;; but use the GUARANTEE argument to `window-end' ;; so that we get the right value even if we ;; didn't do a redisplay. (let ((this-end (window-end w t)) (pixvis (window-last-line-visible-height w))) ;; in case we get stuck somewhere, bow out ;; rather than printing an infinite number of ;; pages. #### this will fail with an image ;; bigger than an entire page. but we really ;; need this check here. we should be more ;; clever in our check, to deal with this case. (if (or (= this-end last-end) ;; #### fuckme! window-end returns a ;; value outside of the valid range of ;; buffer positions!!! (>= this-end end)) (setq reached-end t) (setq last-end this-end) (set-window-start w this-end) (if pixvis (with-selected-window w ;; #### scroll-down should take a ;; window arg. (let ((window-pixel-scroll-increment pixvis)) (scroll-down 1)))))) (setq pageno (1+ pageno))))))) (and f (delete-frame f)) (and header-buffer (kill-buffer header-buffer)) (and footer-buffer (kill-buffer footer-buffer)))) (setq copies (1- copies))))) ((and (not (eq system-type 'windows-nt)) (fboundp 'lpr-region)) (lpr-region buffer)) (t (error "No print support available"))))