lisp/ps-def.el

   1 ;;; ps-def.el --- XEmacs and Emacs definitions for ps-print -*- lexical-binding: t -*-
   2
   3 ;; Copyright (C) 2007-2018 Free Software Foundation, Inc.
   4
   5 ;; Author: Vinicius Jose Latorre <viniciusjl.gnu@gmail.com>
   6 ;;      Kenichi Handa <handa@m17n.org> (multi-byte characters)
   7 ;; Maintainer: Kenichi Handa <handa@m17n.org> (multi-byte characters)
   8 ;;      Vinicius Jose Latorre <viniciusjl.gnu@gmail.com>
   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 (declare-function ps-plot-with-face "ps-print" (from to face))
  35 (declare-function ps-plot-string    "ps-print" (string))
  36
  37 (defvar ps-bold-faces)                  ; in ps-print.el
  38 (defvar ps-italic-faces)
  39
  40
  41 \f
  42 ;; ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
  43 ;; ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
  44 ;; XEmacs Definitions
  45
  46
  47 (cond
  48  ((featurep 'xemacs)                    ; XEmacs
  49
  50   ;; ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
  51   ;; ps-bdf
  52
  53   (defvar installation-directory nil)
  54   (defvar coding-system-for-read)
  55
  56   ;; ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
  57   ;; ps-mule
  58
  59   (or (fboundp 'charset-dimension)
  60       (defun charset-dimension (_charset) 1)) ; ascii
  61
  62   (or (fboundp 'char-width)
  63       (defun char-width (_char) 1))     ; ascii
  64
  65   (or (fboundp 'encode-char)
  66       (defun encode-char (ch _ccs)
  67         ch))
  68
  69   ;; ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
  70   ;; ps-print
  71
  72   ;; GNU Emacs
  73   (or (fboundp 'line-beginning-position)
  74       (defun line-beginning-position (&optional n)
  75         (save-excursion
  76           (and n (/= n 1) (forward-line (1- n)))
  77           (beginning-of-line)
  78           (point))))
  79
  80
  81   ;; GNU Emacs
  82   (or (fboundp 'find-composition)
  83       (defalias 'find-composition 'ignore))
  84
  85
  86   (defun ps-xemacs-color-name (color)
  87     (if (color-specifier-p color)
  88         (color-name color)
  89       color))
  90
  91
  92   (defalias 'ps-mark-active-p 'region-active-p)
  93
  94
  95   (defun ps-face-foreground-name (face)
  96     (ps-xemacs-color-name (face-foreground face)))
  97
  98
  99   (defun ps-face-background-name (face)
 100     (ps-xemacs-color-name (face-background face)))
 101
 102
 103   (defalias 'ps-frame-parameter 'frame-property)
 104
 105
 106   ;; Return t if the device (which can be changed during an emacs session)
 107   ;; can handle colors.
 108   (defun ps-color-device ()
 109     (eq (device-class) 'color))
 110
 111   (defun ps-mapper (extent list)
 112     (nconc list
 113            (list (list (extent-start-position extent) 'push extent)
 114                  (list (extent-end-position extent) 'pull extent)))
 115     nil)
 116
 117
 118   (defun ps-extent-sorter (a b)
 119     (< (extent-priority a) (extent-priority b)))
 120
 121
 122   (defun ps-xemacs-face-kind-p (face kind kind-regex)
 123     (let* ((frame-font (or (face-font-instance face)
 124                            (face-font-instance 'default)))
 125            (kind-cons
 126             (and frame-font
 127                  (assq kind
 128                        (font-instance-properties frame-font))))
 129            (kind-spec (cdr-safe kind-cons))
 130            (case-fold-search t))
 131       (and kind-spec (string-match kind-regex kind-spec))))
 132
 133
 134   ;; to avoid XEmacs compilation gripes
 135   (defvar coding-system-for-write)
 136   (defvar buffer-file-coding-system)
 137
 138
 139   (and (fboundp 'find-coding-system)
 140        (or (funcall 'find-coding-system 'raw-text-unix)
 141            (funcall 'copy-coding-system 'no-conversion-unix 'raw-text-unix)))
 142
 143
 144   (defun ps-color-values (x-color)
 145     (let ((color (ps-xemacs-color-name x-color)))
 146       (cond
 147        ((fboundp 'x-color-values)
 148         (funcall 'x-color-values color))
 149        ((and (fboundp 'color-instance-rgb-components)
 150              (ps-color-device))
 151         (funcall 'color-instance-rgb-components
 152                  (if (color-instance-p x-color)
 153                      x-color
 154                    (make-color-instance color))))
 155        (t
 156         (error "No available function to determine X color values")))))
 157
 158
 159   (defun ps-face-bold-p (face)
 160     (or (ps-xemacs-face-kind-p face 'WEIGHT_NAME "bold\\|demibold")
 161         (memq face ps-bold-faces)))     ; Kludge-compatible
 162
 163
 164   (defun ps-face-italic-p (face)
 165     (or (ps-xemacs-face-kind-p face 'ANGLE_NAME "i\\|o")
 166         (ps-xemacs-face-kind-p face 'SLANT "i\\|o")
 167         (memq face ps-italic-faces)))   ; Kludge-compatible
 168
 169
 170   (defalias 'ps-face-strikeout-p 'ignore)
 171
 172
 173   (defalias 'ps-face-overline-p 'ignore)
 174
 175
 176   (defalias 'ps-face-box-p 'ignore)
 177
 178
 179   ;; XEmacs will have to make do with %s (princ) for floats.
 180   (defvar ps-color-format "%s %s %s")
 181   (defvar ps-float-format "%s ")
 182
 183
 184   (defun ps-generate-postscript-with-faces1 (from to)
 185     ;; Generate some PostScript.
 186     (let ((face 'default)
 187           (position to)
 188           ;; XEmacs
 189           ;; Build the list of extents...
 190           (a (cons 'dummy nil))
 191           record type extent extent-list)
 192       (map-extents 'ps-mapper nil from to a)
 193       (setq a (sort (cdr a) 'car-less-than-car)
 194             extent-list nil)
 195
 196       ;; Loop through the extents...
 197       (while a
 198         (setq record (car a)
 199               position (car record)
 200
 201               record (cdr record)
 202               type (car record)
 203
 204               record (cdr record)
 205               extent (car record))
 206
 207         ;; Plot up to this record.
 208         ;; XEmacs 19.12: for some reason, we're getting into a
 209         ;; situation in which some of the records have
 210         ;; positions less than 'from'.  Since we've narrowed
 211         ;; the buffer, this'll generate errors.  This is a hack,
 212         ;; but don't call ps-plot-with-face unless from > point-min.
 213         (and (>= from (point-min))
 214              (ps-plot-with-face from (min position (point-max)) face))
 215
 216         (cond
 217          ((eq type 'push)
 218           (and (extent-face extent)
 219                (setq extent-list (sort (cons extent extent-list)
 220                                        'ps-extent-sorter))))
 221
 222          ((eq type 'pull)
 223           (setq extent-list (sort (delq extent extent-list)
 224                                   'ps-extent-sorter))))
 225
 226         (setq face (if extent-list
 227                        (extent-face (car extent-list))
 228                      'default)
 229               from position
 230               a (cdr a)))
 231
 232       (ps-plot-with-face from to face)))
 233
 234   )
 235  (t                                     ; Emacs
 236   ;; Do nothing
 237   ))                                    ; end cond featurep
 238
 239
 240 \f
 241 ;; ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
 242 ;; ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
 243 ;; Emacs Definitions
 244
 245
 246 (cond
 247  ((featurep 'xemacs)                    ; XEmacs
 248   ;; Do nothing
 249   )
 250  (t                                     ; Emacs
 251
 252
 253   ;; ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
 254   ;; ps-print
 255
 256
 257   (defun ps-mark-active-p ()
 258     mark-active)
 259
 260
 261   (defun ps-face-foreground-name (face)
 262     (face-foreground face nil t))
 263
 264
 265   (defun ps-face-background-name (face)
 266     (face-background face nil t))
 267
 268
 269   (defalias 'ps-frame-parameter 'frame-parameter)
 270
 271
 272   ;; Return t if the device (which can be changed during an emacs session) can
 273   ;; handle colors.  This function is not yet implemented for GNU emacs.
 274   (defun ps-color-device ()
 275     (if (fboundp 'color-values)
 276         (funcall 'color-values "Green")
 277       t))
 278
 279
 280   (defun ps-color-values (x-color)
 281     (cond
 282      ((fboundp 'color-values)
 283       (funcall 'color-values x-color))
 284      ((fboundp 'x-color-values)
 285       (funcall 'x-color-values x-color))
 286      (t
 287       (error "No available function to determine X color values"))))
 288
 289
 290   (defun ps-face-bold-p (face)
 291     (or (face-bold-p face)
 292         (memq face ps-bold-faces)))
 293
 294
 295   (defun ps-face-italic-p (face)
 296     (or (face-italic-p face)
 297         (memq face ps-italic-faces)))
 298
 299
 300   (defun ps-face-strikeout-p (face)
 301     (eq (face-attribute face :strike-through) t))
 302
 303
 304   (defun ps-face-overline-p (face)
 305     (eq (face-attribute face :overline) t))
 306
 307
 308   (defun ps-face-box-p (face)
 309     (not (memq (face-attribute face :box) '(nil unspecified))))
 310
 311
 312   ;; Emacs understands the %f format; we'll use it to limit color RGB values
 313   ;; to three decimals to cut down some on the size of the PostScript output.
 314   (defvar ps-color-format "%0.3f %0.3f %0.3f")
 315   (defvar ps-float-format "%0.3f ")
 316
 317
 318   (defun ps-generate-postscript-with-faces1 (from to)
 319     ;; Generate some PostScript.
 320     (let ((face 'default)
 321           (position to)
 322           ;; Emacs
 323           (property-change from)
 324           (overlay-change from)
 325           before-string after-string)
 326       (while (< from to)
 327         (and (< property-change to)     ; Don't search for property change
 328                                         ; unless previous search succeeded.
 329              (setq property-change (next-property-change from nil to)))
 330         (and (< overlay-change to)      ; Don't search for overlay change
 331                                         ; unless previous search succeeded.
 332              (setq overlay-change (min (next-overlay-change from)
 333                                        to)))
 334         (setq position (min property-change overlay-change)
 335               before-string nil
 336               after-string nil)
 337         (setq face
 338               (cond ((invisible-p from)
 339                      'emacs--invisible--face)
 340                     ((get-char-property from 'face))
 341                     (t 'default)))
 342         ;; Plot up to this record.
 343         (and before-string
 344              (ps-plot-string before-string))
 345         (ps-plot-with-face from position face)
 346         (and after-string
 347              (ps-plot-string after-string))
 348         (setq from position))
 349       (ps-plot-with-face from to face)))
 350
 351   ))                                    ; end cond featurep
 352
 353 \f
 354 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
 355
 356 (provide 'ps-def)
 357
 358 ;;; ps-def.el ends here