225 lines
7.4 KiB
EmacsLisp
225 lines
7.4 KiB
EmacsLisp
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;;; ps-print-invisible.el - addon to ps-print package that deals
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;; with invisible text printing in xemacs
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;; Author: Greg Chernov
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;;
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;; GNU Emacs is free software; you can redistribute it and/or modify
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;; it under the terms of the GNU General Public License as published by
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;; the Free Software Foundation; either version 2, or (at your option)
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;; any later version.
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;; GNU Emacs is distributed in the hope that it will be useful,
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;; but WITHOUT ANY WARRANTY; without even the implied warranty of
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;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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;; GNU General Public License for more details.
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;; You should have received a copy of the GNU General Public License
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;; along with GNU Emacs; see the file COPYING. If not, write to the
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;; Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
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;; Boston, MA 02110-1301, USA.
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;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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;;
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;;; Commentary:
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;;
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;; Put ps-print-invisible.el on your load path.
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;; (require 'ps-print-invisible)
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;; ps-print-buffer-with-faces will not print invisible parts of the buffer.
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;; Work with invisible extents/text properties only
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;; (xemacs hideshow and noutline packages).
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(defun ps-generate-postscript-with-faces (from to)
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;; Some initialization...
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(setq ps-current-effect 0)
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;; Build the reference lists of faces if necessary.
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(when (or ps-always-build-face-reference
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ps-build-face-reference)
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(message "Collecting face information...")
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(ps-build-reference-face-lists))
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;; Black/white printer.
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(setq ps-black-white-faces-alist nil)
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(and (eq ps-print-color-p 'black-white)
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(ps-extend-face-list ps-black-white-faces nil
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'ps-black-white-faces-alist))
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;; Generate some PostScript.
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(save-restriction
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(narrow-to-region from to)
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(ps-print-ensure-fontified from to)
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(let ((face 'default)
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(position to))
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(cond
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((memq ps-print-emacs-type '(xemacs lucid))
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;; Build the list of extents...
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;;(debug)
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(let ((a (cons 'dummy nil))
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record type extent extent-list
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(list-invisible (ps-print-find-invisible-xmas from to)))
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(ps-x-map-extents 'ps-mapper nil from to a)
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(setq a (sort (cdr a) 'car-less-than-car)
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extent-list nil)
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;; Loop through the extents...
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(while a
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(setq record (car a)
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position (car record)
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record (cdr record)
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type (car record)
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record (cdr record)
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extent (car record))
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;; Plot up to this record.
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;; XEmacs 19.12: for some reason, we're getting into a
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;; situation in which some of the records have
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;; positions less than 'from'. Since we've narrowed
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;; the buffer, this'll generate errors. This is a hack,
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;; but don't call ps-plot-with-face unless from > point-min.
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(and (>= from (point-min))
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(ps-plot-with-face from (min position (point-max)) face))
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(cond
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((eq type 'push)
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(and (or (ps-x-extent-face extent)
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(extent-property extent 'invisible))
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(setq extent-list (sort (cons extent extent-list)
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'ps-extent-sorter))))
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((eq type 'pull)
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(setq extent-list (sort (delq extent extent-list)
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'ps-extent-sorter))))
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(setq face (if extent-list
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(let ((prop (extent-property (car extent-list) 'invisible)))
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(if (or (and (eq buffer-invisibility-spec t)
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(not (null prop)))
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(and (consp buffer-invisibility-spec)
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(or (memq prop buffer-invisibility-spec)
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(assq prop buffer-invisibility-spec))))
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'emacs--invisible--face
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(ps-x-extent-face (car extent-list))))
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'default)
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from position
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a (cdr a)))))
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((eq ps-print-emacs-type 'emacs)
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(let ((property-change from)
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(overlay-change from)
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(save-buffer-invisibility-spec buffer-invisibility-spec)
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(buffer-invisibility-spec nil)
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before-string after-string)
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(while (< from to)
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(and (< property-change to) ; Don't search for property change
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; unless previous search succeeded.
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(setq property-change (next-property-change from nil to)))
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(and (< overlay-change to) ; Don't search for overlay change
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; unless previous search succeeded.
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(setq overlay-change (min (ps-e-next-overlay-change from)
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to)))
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(setq position (min property-change overlay-change)
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before-string nil
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after-string nil)
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;; The code below is not quite correct,
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;; because a non-nil overlay invisible property
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;; which is inactive according to the current value
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;; of buffer-invisibility-spec nonetheless overrides
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;; a face text property.
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(setq face
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(cond ((let ((prop (get-text-property from 'invisible)))
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;; Decide whether this invisible property
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;; really makes the text invisible.
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(if (eq save-buffer-invisibility-spec t)
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(not (null prop))
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(or (memq prop save-buffer-invisibility-spec)
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(assq prop save-buffer-invisibility-spec))))
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'emacs--invisible--face)
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((get-text-property from 'face))
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(t 'default)))
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(let ((overlays (ps-e-overlays-at from))
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(face-priority -1)) ; text-property
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(while (and overlays
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(not (eq face 'emacs--invisible--face)))
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(let* ((overlay (car overlays))
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(overlay-invisible
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(ps-e-overlay-get overlay 'invisible))
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(overlay-priority
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(or (ps-e-overlay-get overlay 'priority) 0)))
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(and (> overlay-priority face-priority)
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(setq before-string
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(or (ps-e-overlay-get overlay 'before-string)
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before-string)
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after-string
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(or (and (<= (ps-e-overlay-end overlay) position)
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(ps-e-overlay-get overlay 'after-string))
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after-string)
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face-priority overlay-priority
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face
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(cond
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((if (eq save-buffer-invisibility-spec t)
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(not (null overlay-invisible))
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(or (memq overlay-invisible
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save-buffer-invisibility-spec)
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(assq overlay-invisible
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save-buffer-invisibility-spec)))
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'emacs--invisible--face)
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((ps-e-overlay-get overlay 'face))
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(t face)
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))))
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(setq overlays (cdr overlays))))
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;; Plot up to this record.
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(and before-string
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(ps-plot-string before-string))
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(ps-plot-with-face from position face)
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(and after-string
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(ps-plot-string after-string))
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(setq from position)))))
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(ps-plot-with-face from to face))))
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(defun ps-print-find-invisible-xmas (from to)
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(let ((list nil))
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(map-extents '(lambda (ex ignored)
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(let ((prop (extent-property ex 'invisible)))
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(if (or (and (eq buffer-invisibility-spec t)
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(not (null prop)))
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(or (memq prop buffer-invisibility-spec)
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(assq prop buffer-invisibility-spec)))
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(setq list (cons (list
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(extent-start-position ex)
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(extent-end-position ex))
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list))))
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nil)
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(current-buffer)
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from to nil 'start-and-end-in-region 'invisible)
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(reverse list)))
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(defun ps-mapper (extent list)
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;;(debug)
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(let ((beg (ps-x-extent-start-position extent))
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(end (ps-x-extent-end-position extent))
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(inv-lst list-invisible)
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(found nil))
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(while (and inv-lst
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(not found))
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(let ((inv-beg (caar inv-lst))
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(inv-end (cadar inv-lst)))
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(if (and (>= beg inv-beg)
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(<= end inv-end)
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(not (extent-property extent 'invisible)))
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(setq found t))
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(setq inv-lst (cdr inv-lst))))
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(if (not found)
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(nconc list
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(list (list beg 'push extent)
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(list end 'pull extent)))))
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nil)
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(provide 'ps-print-invisible)
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;;; ps-print-invisible.el ends here
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