(Limitations and Known Bugs): State that the number of parens/brackets in

[emacs.git] / lisp / ps-def.el

;;; ps-def.el --- XEmacs and Emacs definitions for ps-print

;; Copyright (C) 2007, 2008 Free Software Foundation, Inc.

;; Author: Vinicius Jose Latorre <viniciusjl@ig.com.br>
;;      Kenichi Handa <handa@m17n.org> (multi-byte characters)
;; Maintainer: Kenichi Handa <handa@m17n.org> (multi-byte characters)
;;      Vinicius Jose Latorre <viniciusjl@ig.com.br>
;; Keywords: wp, print, PostScript
;; X-URL: http://www.emacswiki.org/cgi-bin/wiki/ViniciusJoseLatorre

;; This file is part of GNU Emacs.

;; GNU Emacs 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.

;; GNU Emacs 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
;; GNU Emacs; see the file COPYING.  If not, write to the Free Software
;; Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.

;;; Commentary:

;; See ps-print.el for documentation.

;;; Code:

(eval-and-compile
  (unless (fboundp 'declare-function) (defmacro declare-function (&rest r))))

(declare-function ps-plot-with-face "ps-print" (from to face))
(declare-function ps-plot-string    "ps-print" (string))

(defvar ps-bold-faces)                  ; in ps-print.el
(defvar ps-italic-faces)


\f
;; ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;; ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;; XEmacs Definitions


(cond
 ((featurep 'xemacs)                    ; XEmacs


  ;; ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
  ;; ps-bdf

  (defvar installation-directory nil)
  (defvar coding-system-for-read)


  ;; ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
  ;; ps-mule

  (defvar leading-code-private-22 157)

  (or (fboundp 'charset-bytes)
      (defun charset-bytes (charset) 1)) ; ascii

  (or (fboundp 'charset-dimension)
      (defun charset-dimension (charset) 1)) ; ascii

  (or (fboundp 'charset-id)
      (defun charset-id (charset) 0))   ; ascii

  (or (fboundp 'charset-width)
      (defun charset-width (charset) 1)) ; ascii

  (or (fboundp 'find-charset-region)
      (defun find-charset-region (beg end &optional table)
        (list 'ascii)))

  (or (fboundp 'char-width)
      (defun char-width (char) 1))      ; ascii

  (or (fboundp 'chars-in-region)
      (defun chars-in-region (beg end)
        (- (max beg end) (min beg end))))

  (or (fboundp 'forward-point)
      (defun forward-point (arg)
        (save-excursion
          (let ((count (abs arg))
                (step  (if (zerop arg)
                           0
                         (/ arg arg))))
            (while (and (> count 0)
                        (< (point-min) (point)) (< (point) (point-max)))
              (forward-char step)
              (setq count (1- count)))
            (+ (point) (* count step))))))

  (or (fboundp 'decompose-composite-char)
      (defun decompose-composite-char (char &optional type
                                            with-composition-rule)
        nil))

  (or (fboundp 'encode-coding-string)
      (defun encode-coding-string (string coding-system &optional nocopy)
        (if nocopy
            string
          (copy-sequence string))))

  (or (fboundp 'coding-system-p)
      (defun coding-system-p (obj) nil))

  (or (fboundp 'ccl-execute-on-string)
      (defun ccl-execute-on-string (ccl-prog status str
                                             &optional contin unibyte-p)
        str))

  (or (fboundp 'define-ccl-program)
      (defmacro define-ccl-program (name ccl-program &optional doc)
        `(defconst ,name nil ,doc)))

  (or (fboundp 'multibyte-string-p)
      (defun multibyte-string-p (str)
        (let ((len (length str))
              (i 0)
              multibyte)
          (while (and (< i len) (not (setq multibyte (> (aref str i) 255))))
            (setq i (1+ i)))
          multibyte)))

  (or (fboundp 'string-make-multibyte)
      (defalias 'string-make-multibyte 'copy-sequence))

  (or (fboundp 'encode-char)
      (defun encode-char (ch ccs)
        ch))


  ;; ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
  ;; ps-print

  ;; GNU Emacs
  (or (fboundp 'line-beginning-position)
      (defun line-beginning-position (&optional n)
        (save-excursion
          (and n (/= n 1) (forward-line (1- n)))
          (beginning-of-line)
          (point))))


  ;; GNU Emacs
  (or (fboundp 'find-composition)
      (defalias 'find-composition 'ignore))


  (defun ps-xemacs-color-name (color)
    (if (color-specifier-p color)
        (color-name color)
      color))


  (defalias 'ps-mark-active-p 'region-active-p)


  (defun ps-face-foreground-name (face)
    (ps-xemacs-color-name (face-foreground face)))


  (defun ps-face-background-name (face)
    (ps-xemacs-color-name (face-background face)))


  (defalias 'ps-frame-parameter 'frame-property)


  ;; Return t if the device (which can be changed during an emacs session)
  ;; can handle colors.
  ;; XEmacs change: Need to check for emacs-major-version too.
  (if (or (> emacs-major-version 19)
          (and (= emacs-major-version 19)
               (>= emacs-minor-version 12)))
      ;; xemacs >= 19.12
      (defun ps-color-device ()
        (eq (device-class) 'color))
    ;; xemacs < 19.12
    (setq ps-print-color-p nil)
    (defalias 'ps-color-device 'ignore))


  (defun ps-mapper (extent list)
    (nconc list
           (list (list (extent-start-position extent) 'push extent)
                 (list (extent-end-position extent) 'pull extent)))
    nil)


  (defun ps-extent-sorter (a b)
    (< (extent-priority a) (extent-priority b)))


  (defun ps-xemacs-face-kind-p (face kind kind-regex)
    (let* ((frame-font (or (face-font-instance face)
                           (face-font-instance 'default)))
           (kind-cons
            (and frame-font
                 (assq kind
                       (font-instance-properties frame-font))))
           (kind-spec (cdr-safe kind-cons))
           (case-fold-search t))
      (and kind-spec (string-match kind-regex kind-spec))))


  ;; to avoid XEmacs compilation gripes
  (defvar coding-system-for-write)
  (defvar buffer-file-coding-system)


  (and (fboundp 'find-coding-system)
       (or (funcall 'find-coding-system 'raw-text-unix)
           (funcall 'copy-coding-system 'no-conversion-unix 'raw-text-unix)))


  (defun ps-color-values (x-color)
    (let ((color (ps-xemacs-color-name x-color)))
      (cond
       ((fboundp 'x-color-values)
        (funcall 'x-color-values color))
       ((and (fboundp 'color-instance-rgb-components)
             (ps-color-device))
        (funcall 'color-instance-rgb-components
                 (if (color-instance-p x-color)
                     x-color
                   (make-color-instance color))))
       (t
        (error "No available function to determine X color values")))))


  (defun ps-face-bold-p (face)
    (or (ps-xemacs-face-kind-p face 'WEIGHT_NAME "bold\\|demibold")
        (memq face ps-bold-faces)))     ; Kludge-compatible


  (defun ps-face-italic-p (face)
    (or (ps-xemacs-face-kind-p face 'ANGLE_NAME "i\\|o")
        (ps-xemacs-face-kind-p face 'SLANT "i\\|o")
        (memq face ps-italic-faces)))   ; Kludge-compatible


  (defalias 'ps-face-strikeout-p 'ignore)


  (defalias 'ps-face-overline-p 'ignore)


  (defalias 'ps-face-box-p 'ignore)


  ;; XEmacs will have to make do with %s (princ) for floats.
  (defvar ps-color-format "%s %s %s")
  (defvar ps-float-format "%s ")


  (defun ps-generate-postscript-with-faces1 (from to)
    ;; Generate some PostScript.
    (let ((face 'default)
          (position to)
          ;; XEmacs
          ;; Build the list of extents...
          (a (cons 'dummy nil))
          record type extent extent-list)
      (map-extents 'ps-mapper nil from to a)
      (setq a (sort (cdr a) 'car-less-than-car)
            extent-list nil)

      ;; Loop through the extents...
      (while a
        (setq record (car a)
              position (car record)

              record (cdr record)
              type (car record)

              record (cdr record)
              extent (car record))

        ;; Plot up to this record.
        ;; XEmacs 19.12: for some reason, we're getting into a
        ;; situation in which some of the records have
        ;; positions less than 'from'.  Since we've narrowed
        ;; the buffer, this'll generate errors.  This is a hack,
        ;; but don't call ps-plot-with-face unless from > point-min.
        (and (>= from (point-min))
             (ps-plot-with-face from (min position (point-max)) face))

        (cond
         ((eq type 'push)
          (and (extent-face extent)
               (setq extent-list (sort (cons extent extent-list)
                                       'ps-extent-sorter))))

         ((eq type 'pull)
          (setq extent-list (sort (delq extent extent-list)
                                  'ps-extent-sorter))))

        (setq face (if extent-list
                       (extent-face (car extent-list))
                     'default)
              from position
              a (cdr a)))

      (ps-plot-with-face from to face)))

  )
 (t                                     ; Emacs
  ;; Do nothing
  ))                                    ; end cond featurep


\f
;; ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;; ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;; Emacs Definitions


(cond
 ((featurep 'xemacs)                    ; XEmacs
  ;; Do nothing
  )
 (t                                     ; Emacs


  ;; ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
  ;; ps-print


  (defun ps-mark-active-p ()
    mark-active)


  (defun ps-face-foreground-name (face)
    (face-foreground face nil t))


  (defun ps-face-background-name (face)
    (face-background face nil t))


  (defalias 'ps-frame-parameter 'frame-parameter)


  ;; Return t if the device (which can be changed during an emacs session) can
  ;; handle colors.  This function is not yet implemented for GNU emacs.
  (defun ps-color-device ()
    (if (fboundp 'color-values)
        (funcall 'color-values "Green")
      t))


  (defun ps-color-values (x-color)
    (cond
     ((fboundp 'color-values)
      (funcall 'color-values x-color))
     ((fboundp 'x-color-values)
      (funcall 'x-color-values x-color))
     (t
      (error "No available function to determine X color values"))))


  (defun ps-face-bold-p (face)
    (or (face-bold-p face)
        (memq face ps-bold-faces)))


  (defun ps-face-italic-p (face)
    (or (face-italic-p face)
        (memq face ps-italic-faces)))


  (defun ps-face-strikeout-p (face)
    (eq (face-attribute face :strike-through) t))


  (defun ps-face-overline-p (face)
    (eq (face-attribute face :overline) t))


  (defun ps-face-box-p (face)
    (not (memq (face-attribute face :box) '(nil unspecified))))


  ;; Emacs understands the %f format; we'll use it to limit color RGB values
  ;; to three decimals to cut down some on the size of the PostScript output.
  (defvar ps-color-format "%0.3f %0.3f %0.3f")
  (defvar ps-float-format "%0.3f ")


  (defun ps-generate-postscript-with-faces1 (from to)
    ;; Generate some PostScript.
    (let ((face 'default)
          (position to)
          ;; Emacs
          (property-change from)
          (overlay-change from)
          (save-buffer-invisibility-spec buffer-invisibility-spec)
          (buffer-invisibility-spec nil)
          before-string after-string)
      (while (< from to)
        (and (< property-change to)     ; Don't search for property change
                                        ; unless previous search succeeded.
             (setq property-change (next-property-change from nil to)))
        (and (< overlay-change to)      ; Don't search for overlay change
                                        ; unless previous search succeeded.
             (setq overlay-change (min (next-overlay-change from)
                                       to)))
        (setq position (min property-change overlay-change)
              before-string nil
              after-string nil)
        ;; The code below is not quite correct,
        ;; because a non-nil overlay invisible property
        ;; which is inactive according to the current value
        ;; of buffer-invisibility-spec nonetheless overrides
        ;; a face text property.
        (setq face
              (cond ((let ((prop (get-text-property from 'invisible)))
                       ;; Decide whether this invisible property
                       ;; really makes the text invisible.
                       (if (eq save-buffer-invisibility-spec t)
                           (not (null prop))
                         (or (memq prop save-buffer-invisibility-spec)
                             (assq prop save-buffer-invisibility-spec))))
                     'emacs--invisible--face)
                    ((get-text-property from 'face))
                    (t 'default)))
        (let ((overlays (overlays-at from))
              (face-priority -1))       ; text-property
          (while (and overlays
                      (not (eq face 'emacs--invisible--face)))
            (let* ((overlay (car overlays))
                   (overlay-invisible
                    (overlay-get overlay 'invisible))
                   (overlay-priority
                    (or (overlay-get overlay 'priority) 0)))
              (and (> overlay-priority face-priority)
                   (setq before-string
                         (or (overlay-get overlay 'before-string)
                             before-string)
                         after-string
                         (or (and (<= (overlay-end overlay) position)
                                  (overlay-get overlay 'after-string))
                             after-string)
                         face-priority overlay-priority
                         face
                         (cond
                          ((if (eq save-buffer-invisibility-spec t)
                               (not (null overlay-invisible))
                             (or (memq overlay-invisible
                                       save-buffer-invisibility-spec)
                                 (assq overlay-invisible
                                       save-buffer-invisibility-spec)))
                           'emacs--invisible--face)
                          ((overlay-get overlay 'face))
                          (t face)
                          ))))
            (setq overlays (cdr overlays))))
        ;; Plot up to this record.
        (and before-string
             (ps-plot-string before-string))
        (ps-plot-with-face from position face)
        (and after-string
             (ps-plot-string after-string))
        (setq from position))
      (ps-plot-with-face from to face)))

  ))                                    ; end cond featurep

\f
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;

(provide 'ps-def)

;; arch-tag: 4edde45b-af10-4685-b8ee-7cd0f951095a
;;; ps-def.el ends here