lisp/ps-def.el

   1 ;;; ps-def.el --- XEmacs and Emacs definitions for ps-print -*- lexical-binding: t -*-
   2
   3 ;; Copyright (C) 2007-2017 Free Software Foundation, Inc.
   4
   5 ;; Author: Vinicius Jose Latorre <viniciusjl@ig.com.br>
   6 ;;      Kenichi Handa <handa@m17n.org> (multi-byte characters)
   7 ;; Maintainer: Kenichi Handa <handa@m17n.org> (multi-byte characters)
   8 ;;      Vinicius Jose Latorre <viniciusjl@ig.com.br>
   9 ;; Keywords: wp, print, PostScript
  10 ;; X-URL: http://www.emacswiki.org/cgi-bin/wiki/ViniciusJoseLatorre
  11 ;; Package: ps-print
  12
  13 ;; This file is part of GNU Emacs.
  14
  15 ;; GNU Emacs is free software: you can redistribute it and/or modify
  16 ;; it under the terms of the GNU General Public License as published by
  17 ;; the Free Software Foundation, either version 3 of the License, or
  18 ;; (at your option) any later version.
  19
  20 ;; GNU Emacs is distributed in the hope that it will be useful,
  21 ;; but WITHOUT ANY WARRANTY; without even the implied warranty of
  22 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  23 ;; GNU General Public License for more details.
  24
  25 ;; You should have received a copy of the GNU General Public License
  26 ;; along with GNU Emacs.  If not, see <https://www.gnu.org/licenses/>.
  27
  28 ;;; Commentary:
  29
  30 ;; See ps-print.el for documentation.
  31
  32 ;;; Code:
  33
  34 (eval-and-compile
  35   (unless (fboundp 'declare-function) (defmacro declare-function (&rest _r))))
  36
  37 (declare-function ps-plot-with-face "ps-print" (from to face))
  38 (declare-function ps-plot-string    "ps-print" (string))
  39
  40 (defvar ps-bold-faces)                  ; in ps-print.el
  41 (defvar ps-italic-faces)
  42
  43
  44 \f
  45 ;; ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
  46 ;; ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
  47 ;; XEmacs Definitions
  48
  49
  50 (cond
  51  ((featurep 'xemacs)                    ; XEmacs
  52
  53   ;; ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
  54   ;; ps-bdf
  55
  56   (defvar installation-directory nil)
  57   (defvar coding-system-for-read)
  58
  59   ;; ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
  60   ;; ps-mule
  61
  62   (or (fboundp 'charset-dimension)
  63       (defun charset-dimension (_charset) 1)) ; ascii
  64
  65   (or (fboundp 'char-width)
  66       (defun char-width (_char) 1))     ; ascii
  67
  68   (or (fboundp 'encode-char)
  69       (defun encode-char (ch _ccs)
  70         ch))
  71
  72   ;; ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
  73   ;; ps-print
  74
  75   ;; GNU Emacs
  76   (or (fboundp 'line-beginning-position)
  77       (defun line-beginning-position (&optional n)
  78         (save-excursion
  79           (and n (/= n 1) (forward-line (1- n)))
  80           (beginning-of-line)
  81           (point))))
  82
  83
  84   ;; GNU Emacs
  85   (or (fboundp 'find-composition)
  86       (defalias 'find-composition 'ignore))
  87
  88
  89   (defun ps-xemacs-color-name (color)
  90     (if (color-specifier-p color)
  91         (color-name color)
  92       color))
  93
  94
  95   (defalias 'ps-mark-active-p 'region-active-p)
  96
  97
  98   (defun ps-face-foreground-name (face)
  99     (ps-xemacs-color-name (face-foreground face)))
 100
 101
 102   (defun ps-face-background-name (face)
 103     (ps-xemacs-color-name (face-background face)))
 104
 105
 106   (defalias 'ps-frame-parameter 'frame-property)
 107
 108
 109   ;; Return t if the device (which can be changed during an emacs session)
 110   ;; can handle colors.
 111   (defun ps-color-device ()
 112     (eq (device-class) 'color))
 113
 114   (defun ps-mapper (extent list)
 115     (nconc list
 116            (list (list (extent-start-position extent) 'push extent)
 117                  (list (extent-end-position extent) 'pull extent)))
 118     nil)
 119
 120
 121   (defun ps-extent-sorter (a b)
 122     (< (extent-priority a) (extent-priority b)))
 123
 124
 125   (defun ps-xemacs-face-kind-p (face kind kind-regex)
 126     (let* ((frame-font (or (face-font-instance face)
 127                            (face-font-instance 'default)))
 128            (kind-cons
 129             (and frame-font
 130                  (assq kind
 131                        (font-instance-properties frame-font))))
 132            (kind-spec (cdr-safe kind-cons))
 133            (case-fold-search t))
 134       (and kind-spec (string-match kind-regex kind-spec))))
 135
 136
 137   ;; to avoid XEmacs compilation gripes
 138   (defvar coding-system-for-write)
 139   (defvar buffer-file-coding-system)
 140
 141
 142   (and (fboundp 'find-coding-system)
 143        (or (funcall 'find-coding-system 'raw-text-unix)
 144            (funcall 'copy-coding-system 'no-conversion-unix 'raw-text-unix)))
 145
 146
 147   (defun ps-color-values (x-color)
 148     (let ((color (ps-xemacs-color-name x-color)))
 149       (cond
 150        ((fboundp 'x-color-values)
 151         (funcall 'x-color-values color))
 152        ((and (fboundp 'color-instance-rgb-components)
 153              (ps-color-device))
 154         (funcall 'color-instance-rgb-components
 155                  (if (color-instance-p x-color)
 156                      x-color
 157                    (make-color-instance color))))
 158        (t
 159         (error "No available function to determine X color values")))))
 160
 161
 162   (defun ps-face-bold-p (face)
 163     (or (ps-xemacs-face-kind-p face 'WEIGHT_NAME "bold\\|demibold")
 164         (memq face ps-bold-faces)))     ; Kludge-compatible
 165
 166
 167   (defun ps-face-italic-p (face)
 168     (or (ps-xemacs-face-kind-p face 'ANGLE_NAME "i\\|o")
 169         (ps-xemacs-face-kind-p face 'SLANT "i\\|o")
 170         (memq face ps-italic-faces)))   ; Kludge-compatible
 171
 172
 173   (defalias 'ps-face-strikeout-p 'ignore)
 174
 175
 176   (defalias 'ps-face-overline-p 'ignore)
 177
 178
 179   (defalias 'ps-face-box-p 'ignore)
 180
 181
 182   ;; XEmacs will have to make do with %s (princ) for floats.
 183   (defvar ps-color-format "%s %s %s")
 184   (defvar ps-float-format "%s ")
 185
 186
 187   (defun ps-generate-postscript-with-faces1 (from to)
 188     ;; Generate some PostScript.
 189     (let ((face 'default)
 190           (position to)
 191           ;; XEmacs
 192           ;; Build the list of extents...
 193           (a (cons 'dummy nil))
 194           record type extent extent-list)
 195       (map-extents 'ps-mapper nil from to a)
 196       (setq a (sort (cdr a) 'car-less-than-car)
 197             extent-list nil)
 198
 199       ;; Loop through the extents...
 200       (while a
 201         (setq record (car a)
 202               position (car record)
 203
 204               record (cdr record)
 205               type (car record)
 206
 207               record (cdr record)
 208               extent (car record))
 209
 210         ;; Plot up to this record.
 211         ;; XEmacs 19.12: for some reason, we're getting into a
 212         ;; situation in which some of the records have
 213         ;; positions less than 'from'.  Since we've narrowed
 214         ;; the buffer, this'll generate errors.  This is a hack,
 215         ;; but don't call ps-plot-with-face unless from > point-min.
 216         (and (>= from (point-min))
 217              (ps-plot-with-face from (min position (point-max)) face))
 218
 219         (cond
 220          ((eq type 'push)
 221           (and (extent-face extent)
 222                (setq extent-list (sort (cons extent extent-list)
 223                                        'ps-extent-sorter))))
 224
 225          ((eq type 'pull)
 226           (setq extent-list (sort (delq extent extent-list)
 227                                   'ps-extent-sorter))))
 228
 229         (setq face (if extent-list
 230                        (extent-face (car extent-list))
 231                      'default)
 232               from position
 233               a (cdr a)))
 234
 235       (ps-plot-with-face from to face)))
 236
 237   )
 238  (t                                     ; Emacs
 239   ;; Do nothing
 240   ))                                    ; end cond featurep
 241
 242
 243 \f
 244 ;; ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
 245 ;; ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
 246 ;; Emacs Definitions
 247
 248
 249 (cond
 250  ((featurep 'xemacs)                    ; XEmacs
 251   ;; Do nothing
 252   )
 253  (t                                     ; Emacs
 254
 255
 256   ;; ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
 257   ;; ps-print
 258
 259
 260   (defun ps-mark-active-p ()
 261     mark-active)
 262
 263
 264   (defun ps-face-foreground-name (face)
 265     (face-foreground face nil t))
 266
 267
 268   (defun ps-face-background-name (face)
 269     (face-background face nil t))
 270
 271
 272   (defalias 'ps-frame-parameter 'frame-parameter)
 273
 274
 275   ;; Return t if the device (which can be changed during an emacs session) can
 276   ;; handle colors.  This function is not yet implemented for GNU emacs.
 277   (defun ps-color-device ()
 278     (if (fboundp 'color-values)
 279         (funcall 'color-values "Green")
 280       t))
 281
 282
 283   (defun ps-color-values (x-color)
 284     (cond
 285      ((fboundp 'color-values)
 286       (funcall 'color-values x-color))
 287      ((fboundp 'x-color-values)
 288       (funcall 'x-color-values x-color))
 289      (t
 290       (error "No available function to determine X color values"))))
 291
 292
 293   (defun ps-face-bold-p (face)
 294     (or (face-bold-p face)
 295         (memq face ps-bold-faces)))
 296
 297
 298   (defun ps-face-italic-p (face)
 299     (or (face-italic-p face)
 300         (memq face ps-italic-faces)))
 301
 302
 303   (defun ps-face-strikeout-p (face)
 304     (eq (face-attribute face :strike-through) t))
 305
 306
 307   (defun ps-face-overline-p (face)
 308     (eq (face-attribute face :overline) t))
 309
 310
 311   (defun ps-face-box-p (face)
 312     (not (memq (face-attribute face :box) '(nil unspecified))))
 313
 314
 315   ;; Emacs understands the %f format; we'll use it to limit color RGB values
 316   ;; to three decimals to cut down some on the size of the PostScript output.
 317   (defvar ps-color-format "%0.3f %0.3f %0.3f")
 318   (defvar ps-float-format "%0.3f ")
 319
 320
 321   (defun ps-generate-postscript-with-faces1 (from to)
 322     ;; Generate some PostScript.
 323     (let ((face 'default)
 324           (position to)
 325           ;; Emacs
 326           (property-change from)
 327           (overlay-change from)
 328           before-string after-string)
 329       (while (< from to)
 330         (and (< property-change to)     ; Don't search for property change
 331                                         ; unless previous search succeeded.
 332              (setq property-change (next-property-change from nil to)))
 333         (and (< overlay-change to)      ; Don't search for overlay change
 334                                         ; unless previous search succeeded.
 335              (setq overlay-change (min (next-overlay-change from)
 336                                        to)))
 337         (setq position (min property-change overlay-change)
 338               before-string nil
 339               after-string nil)
 340         (setq face
 341               (cond ((invisible-p from)
 342                      'emacs--invisible--face)
 343                     ((get-char-property from 'face))
 344                     (t 'default)))
 345         ;; Plot up to this record.
 346         (and before-string
 347              (ps-plot-string before-string))
 348         (ps-plot-with-face from position face)
 349         (and after-string
 350              (ps-plot-string after-string))
 351         (setq from position))
 352       (ps-plot-with-face from to face)))
 353
 354   ))                                    ; end cond featurep
 355
 356 \f
 357 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
 358
 359 (provide 'ps-def)
 360
 361 ;;; ps-def.el ends here