;;; 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 () ;; relying on GC to delete the device is too error-prone since there ;; only can be one anyway. (and printer-current-device (delete-device printer-current-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))) (condition-case err (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-device-type-p 'msprinter)) (not display-print-dialog)) (generic-print-region start end buffer) (let* ((d (Printer-get-device)) (props (make-dialog-box 'print :device d :allow-selection print-region :selected-page-button (if print-region 'selection 'all)))) (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)))))) (error ;; Make sure we catch all errors thrown from the native code. (Printer-clear-device) (signal (car err) (cdr err))))) (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-device-type-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)) ;; This is not relevant to printing and can mess up ;; msprinter frame sizing default-frame-plist) (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 [default foreground] "black" [default background] "white")) 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 start end)) (t (error "No print support available"))))