code.delx.au - gnu-emacs/blob - lisp/obsolete/lucid.el

   1 ;;; lucid.el --- emulate some Lucid Emacs functions
   2
   3 ;; Copyright (C) 1993, 1995, 2001, 2002, 2003, 2004,
   4 ;;   2005, 2006, 2007, 2008, 2009, 2010, 2011 Free Software Foundation, Inc.
   5
   6 ;; Maintainer: FSF
   7 ;; Keywords: emulations
   8 ;; Obsolete-since: 23.2
   9
  10 ;; This file is part of GNU Emacs.
  11
  12 ;; GNU Emacs is free software: you can redistribute it and/or modify
  13 ;; it under the terms of the GNU General Public License as published by
  14 ;; the Free Software Foundation, either version 3 of the License, or
  15 ;; (at your option) any later version.
  16
  17 ;; GNU Emacs is distributed in the hope that it will be useful,
  18 ;; but WITHOUT ANY WARRANTY; without even the implied warranty of
  19 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  20 ;; GNU General Public License for more details.
  21
  22 ;; You should have received a copy of the GNU General Public License
  23 ;; along with GNU Emacs.  If not, see <http://www.gnu.org/licenses/>.
  24
  25 ;;; Commentary:
  26
  27 ;;; Code:
  28
  29 ;; XEmacs autoloads CL so we might as well make use of it.
  30 (require 'cl)
  31
  32 (defalias 'current-time-seconds 'current-time)
  33
  34 (defun read-number (prompt &optional integers-only)
  35   "Read a number from the minibuffer.
  36 Keep reentering the minibuffer until we get suitable input.
  37 If optional argument INTEGERS-ONLY is non-nil, insist on an integer."
  38   (interactive)
  39   (let (success
  40         (number nil)
  41         (predicate (if integers-only 'integerp 'numberp)))
  42     (while (not success)
  43       (let ((input-string (read-string prompt)))
  44         (condition-case ()
  45             (setq number (read input-string))
  46           (error))
  47         (if (funcall predicate number)
  48             (setq success t)
  49           (let ((cursor-in-echo-area t))
  50             (message "Please type %s"
  51                      (if integers-only "an integer" "a number"))
  52             (sit-for 1)))))
  53     number))
  54
  55 (defun real-path-name (name &optional default)
  56   (file-truename (expand-file-name name default)))
  57
  58 ;; It's not clear what to return if the mouse is not in FRAME.
  59 (defun read-mouse-position (frame)
  60   (let ((pos (mouse-position)))
  61     (if (eq (car pos) frame)
  62         (cdr pos))))
  63
  64 (defun switch-to-other-buffer (arg)
  65   "Switch to the previous buffer.
  66 With a numeric arg N, switch to the Nth most recent buffer.
  67 With an arg of 0, buries the current buffer at the
  68 bottom of the buffer stack."
  69   (interactive "p")
  70   (if (eq arg 0)
  71       (bury-buffer (current-buffer)))
  72   (switch-to-buffer
  73    (if (<= arg 1) (other-buffer (current-buffer))
  74      (nth arg
  75           (apply 'nconc
  76                  (mapcar
  77                   (lambda (buf)
  78                     (if (= ?\  (string-to-char (buffer-name buf)))
  79                         nil
  80                       (list buf)))
  81                   (buffer-list)))))))
  82
  83 (defun device-class (&optional device)
  84   "Return the class (color behavior) of DEVICE.
  85 This will be one of 'color, 'grayscale, or 'mono.
  86 This function exists for compatibility with XEmacs."
  87   (cond
  88    ((display-color-p device) 'color)
  89    ((display-grayscale-p device) 'grayscale)
  90    (t 'mono)))
  91
  92 (defalias 'find-face 'internal-find-face)
  93 (defalias 'get-face 'internal-get-face)
  94 ;; internal-try-face-font was removed from faces.el in rev 1.139, 1999/07/21.
  95 ;;;(defalias 'try-face-font 'internal-try-face-font)
  96
  97 (defalias 'exec-to-string 'shell-command-to-string)
  98 \f
  99
 100 ;; Buffer context
 101
 102 (defun buffer-syntactic-context (&optional buffer)
 103   "Syntactic context at point in BUFFER.
 104 Either of `string', `comment' or nil.
 105 This is an XEmacs compatibility function."
 106   (with-current-buffer (or buffer (current-buffer))
 107     (let ((state (syntax-ppss (point))))
 108       (cond
 109        ((nth 3 state) 'string)
 110        ((nth 4 state) 'comment)))))
 111
 112
 113 (defun buffer-syntactic-context-depth (&optional buffer)
 114   "Syntactic parenthesis depth at point in BUFFER.
 115 This is an XEmacs compatibility function."
 116   (with-current-buffer (or buffer (current-buffer))
 117     (nth 0 (syntax-ppss (point)))))
 118
 119
 120 ;; Extents
 121 (defun make-extent (beg end &optional buffer)
 122   (make-overlay beg end buffer))
 123
 124 (defun extent-properties (extent) (overlay-properties extent))
 125 (unless (fboundp 'extent-property) (defalias 'extent-property 'overlay-get))
 126
 127 (defun extent-at (pos &optional object property before)
 128   (with-current-buffer (or object (current-buffer))
 129     (let ((overlays (overlays-at pos)))
 130       (when property
 131         (let (filtered)
 132           (while overlays
 133             (if (overlay-get (car overlays) property)
 134                 (setq filtered (cons (car overlays) filtered)))
 135             (setq overlays (cdr overlays)))
 136           (setq overlays filtered)))
 137       (setq overlays
 138             (sort overlays
 139                   (function (lambda (o1 o2)
 140                               (let ((p1 (or (overlay-get o1 'priority) 0))
 141                                     (p2 (or (overlay-get o2 'priority) 0)))
 142                                 (or (> p1 p2)
 143                                     (and (= p1 p2)
 144                                          (> (overlay-start o1) (overlay-start o2)))))))))
 145       (if before
 146           (nth 1 (memq before overlays))
 147         (car overlays)))))
 148
 149 (defun set-extent-property (extent prop value)
 150   ;; Make sure that separate adjacent extents
 151   ;; with the same mouse-face value
 152   ;; do not run together as one extent.
 153   (and (eq prop 'mouse-face)
 154        (symbolp value)
 155        (setq value (list value)))
 156   (if (eq prop 'duplicable)
 157       (cond ((and value (not (overlay-get extent prop)))
 158              ;; If becoming duplicable, copy all overlayprops to text props.
 159              (add-text-properties (overlay-start extent)
 160                                   (overlay-end extent)
 161                                   (overlay-properties extent)
 162                                   (overlay-buffer extent)))
 163             ;; If becoming no longer duplicable, remove these text props.
 164             ((and (not value) (overlay-get extent prop))
 165              (remove-text-properties (overlay-start extent)
 166                                      (overlay-end extent)
 167                                      (overlay-properties extent)
 168                                      (overlay-buffer extent))))
 169     ;; If extent is already duplicable, put this property
 170     ;; on the text as well as on the overlay.
 171     (if (overlay-get extent 'duplicable)
 172         (put-text-property  (overlay-start extent)
 173                             (overlay-end extent)
 174                             prop value (overlay-buffer extent))))
 175   (overlay-put extent prop value))
 176
 177 (defun set-extent-face (extent face)
 178   (set-extent-property extent 'face face))
 179
 180 (defun set-extent-end-glyph (extent glyph)
 181   (set-extent-property extent 'after-string glyph))
 182
 183 (defun delete-extent (extent)
 184   (set-extent-property extent 'duplicable nil)
 185   (delete-overlay extent))
 186 \f
 187 ;; Support the Lucid names with `screen' instead of `frame'.
 188
 189 (defalias 'current-screen-configuration 'current-frame-configuration)
 190 (defalias 'delete-screen 'delete-frame)
 191 (defalias 'find-file-new-screen 'find-file-other-frame)
 192 (defalias 'find-file-read-only-new-screen 'find-file-read-only-other-frame)
 193 (defalias 'find-tag-new-screen 'find-tag-other-frame)
 194 ;;(defalias 'focus-screen 'focus-frame)
 195 (defalias 'iconify-screen 'iconify-frame)
 196 (defalias 'mail-new-screen 'mail-other-frame)
 197 (defalias 'make-screen-invisible 'make-frame-invisible)
 198 (defalias 'make-screen-visible 'make-frame-visible)
 199 ;; (defalias 'minibuffer-screen-list 'minibuffer-frame-list)
 200 (defalias 'modify-screen-parameters 'modify-frame-parameters)
 201 (defalias 'next-screen 'next-frame)
 202 ;; (defalias 'next-multiscreen-window 'next-multiframe-window)
 203 ;; (defalias 'previous-multiscreen-window 'previous-multiframe-window)
 204 ;; (defalias 'redirect-screen-focus 'redirect-frame-focus)
 205 (defalias 'redraw-screen 'redraw-frame)
 206 ;; (defalias 'screen-char-height 'frame-char-height)
 207 ;; (defalias 'screen-char-width 'frame-char-width)
 208 ;; (defalias 'screen-configuration-to-register 'frame-configuration-to-register)
 209 ;; (defalias 'screen-focus 'frame-focus)
 210 (defalias 'screen-list 'frame-list)
 211 ;; (defalias 'screen-live-p 'frame-live-p)
 212 (defalias 'screen-parameters 'frame-parameters)
 213 (defalias 'screen-pixel-height 'frame-pixel-height)
 214 (defalias 'screen-pixel-width 'frame-pixel-width)
 215 (defalias 'screen-root-window 'frame-root-window)
 216 (defalias 'screen-selected-window 'frame-selected-window)
 217 (defalias 'lower-screen 'lower-frame)
 218 (defalias 'raise-screen 'raise-frame)
 219 (defalias 'screen-visible-p 'frame-visible-p)
 220 (defalias 'screenp 'framep)
 221 (defalias 'select-screen 'select-frame)
 222 (defalias 'selected-screen 'selected-frame)
 223 ;; (defalias 'set-screen-configuration 'set-frame-configuration)
 224 ;; (defalias 'set-screen-height 'set-frame-height)
 225 (defalias 'set-screen-position 'set-frame-position)
 226 (defalias 'set-screen-size 'set-frame-size)
 227 ;; (defalias 'set-screen-width 'set-frame-width)
 228 (defalias 'switch-to-buffer-new-screen 'switch-to-buffer-other-frame)
 229 ;; (defalias 'unfocus-screen 'unfocus-frame)
 230 (defalias 'visible-screen-list 'visible-frame-list)
 231 (defalias 'window-screen 'window-frame)
 232 (defalias 'x-create-screen 'x-create-frame)
 233 (defalias 'x-new-screen 'make-frame)
 234
 235 (provide 'lucid)
 236
 237 ;; arch-tag: 80f9ab46-0b36-4151-86ed-3edb6d449c9e
 238 ;;; lucid.el ends here