1;;; lucid.el --- emulate some Lucid Emacs functions 2 3;; Copyright (C) 1993, 1995, 2001-2021 Free Software Foundation, Inc. 4 5;; Maintainer: emacs-devel@gnu.org 6;; Keywords: emulations 7;; Obsolete-since: 23.2 8 9;; This file is part of GNU Emacs. 10 11;; GNU Emacs is free software: you can redistribute it and/or modify 12;; it under the terms of the GNU General Public License as published by 13;; the Free Software Foundation, either version 3 of the License, or 14;; (at your option) any later version. 15 16;; GNU Emacs is distributed in the hope that it will be useful, 17;; but WITHOUT ANY WARRANTY; without even the implied warranty of 18;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 19;; GNU General Public License for more details. 20 21;; You should have received a copy of the GNU General Public License 22;; along with GNU Emacs. If not, see <https://www.gnu.org/licenses/>. 23 24;;; Commentary: 25 26;;; Code: 27 28;; XEmacs autoloads CL so we might as well make use of it. 29(require 'cl) 30 31(defalias 'current-time-seconds 'current-time) 32 33(defun real-path-name (name &optional default) 34 (file-truename (expand-file-name name default))) 35 36;; It's not clear what to return if the mouse is not in FRAME. 37(defun read-mouse-position (frame) 38 (let ((pos (mouse-position))) 39 (if (eq (car pos) frame) 40 (cdr pos)))) 41 42(defun switch-to-other-buffer (arg) 43 "Switch to the previous buffer. 44With a numeric arg N, switch to the Nth most recent buffer. 45With an arg of 0, buries the current buffer at the 46bottom of the buffer stack." 47 (interactive "p") 48 (if (eq arg 0) 49 (bury-buffer (current-buffer))) 50 (switch-to-buffer 51 (if (<= arg 1) (other-buffer (current-buffer)) 52 (nth arg 53 (apply 'nconc 54 (mapcar 55 (lambda (buf) 56 (if (= ?\ (string-to-char (buffer-name buf))) 57 nil 58 (list buf))) 59 (buffer-list))))))) 60 61(defun device-class (&optional device) 62 "Return the class (color behavior) of DEVICE. 63This will be one of `color', `grayscale', or `mono'. 64This function exists for compatibility with XEmacs." 65 (cond 66 ((display-color-p device) 'color) 67 ((display-grayscale-p device) 'grayscale) 68 (t 'mono))) 69 70(defalias 'find-face 'facep) 71(defalias 'get-face 'facep) 72;; internal-try-face-font was removed from faces.el in rev 1.139, 1999/07/21. 73;;;(defalias 'try-face-font 'internal-try-face-font) 74 75(defalias 'exec-to-string 'shell-command-to-string) 76 77 78;; Buffer context 79 80(defun buffer-syntactic-context (&optional buffer) 81 "Syntactic context at point in BUFFER. 82Either of `string', `comment' or nil. 83This is an XEmacs compatibility function." 84 (with-current-buffer (or buffer (current-buffer)) 85 (let ((state (syntax-ppss (point)))) 86 (cond 87 ((nth 3 state) 'string) 88 ((nth 4 state) 'comment))))) 89 90 91(defun buffer-syntactic-context-depth (&optional buffer) 92 "Syntactic parenthesis depth at point in BUFFER. 93This is an XEmacs compatibility function." 94 (with-current-buffer (or buffer (current-buffer)) 95 (nth 0 (syntax-ppss (point))))) 96 97 98;; Extents 99(defun make-extent (beg end &optional buffer) 100 (make-overlay beg end buffer)) 101 102(defun extent-properties (extent) (overlay-properties extent)) 103(unless (fboundp 'extent-property) (defalias 'extent-property 'overlay-get)) 104 105(defun extent-at (pos &optional object property before) 106 (with-current-buffer (or object (current-buffer)) 107 (let ((overlays (overlays-at pos 'sorted))) 108 (when property 109 (let (filtered) 110 (while overlays 111 (if (overlay-get (car overlays) property) 112 (setq filtered (cons (car overlays) filtered))) 113 (setq overlays (cdr overlays))) 114 (setq overlays filtered))) 115 (if before 116 (nth 1 (memq before overlays)) 117 (car overlays))))) 118 119(defun set-extent-property (extent prop value) 120 ;; Make sure that separate adjacent extents 121 ;; with the same mouse-face value 122 ;; do not run together as one extent. 123 (and (eq prop 'mouse-face) 124 (symbolp value) 125 (setq value (list value))) 126 (if (eq prop 'duplicable) 127 (cond ((and value (not (overlay-get extent prop))) 128 ;; If becoming duplicable, copy all overlayprops to text props. 129 (add-text-properties (overlay-start extent) 130 (overlay-end extent) 131 (overlay-properties extent) 132 (overlay-buffer extent))) 133 ;; If becoming no longer duplicable, remove these text props. 134 ((and (not value) (overlay-get extent prop)) 135 (remove-text-properties (overlay-start extent) 136 (overlay-end extent) 137 (overlay-properties extent) 138 (overlay-buffer extent)))) 139 ;; If extent is already duplicable, put this property 140 ;; on the text as well as on the overlay. 141 (if (overlay-get extent 'duplicable) 142 (put-text-property (overlay-start extent) 143 (overlay-end extent) 144 prop value (overlay-buffer extent)))) 145 (overlay-put extent prop value)) 146 147(defun set-extent-face (extent face) 148 (set-extent-property extent 'face face)) 149 150(defun set-extent-end-glyph (extent glyph) 151 (set-extent-property extent 'after-string glyph)) 152 153(defun delete-extent (extent) 154 (set-extent-property extent 'duplicable nil) 155 (delete-overlay extent)) 156 157;; Support the Lucid names with `screen' instead of `frame'. 158 159(defalias 'current-screen-configuration 'current-frame-configuration) 160(defalias 'delete-screen 'delete-frame) 161(defalias 'find-file-new-screen 'find-file-other-frame) 162(defalias 'find-file-read-only-new-screen 'find-file-read-only-other-frame) 163(defalias 'find-tag-new-screen 'find-tag-other-frame) 164;;(defalias 'focus-screen 'focus-frame) 165(defalias 'iconify-screen 'iconify-frame) 166(defalias 'mail-new-screen 'mail-other-frame) 167(defalias 'make-screen-invisible 'make-frame-invisible) 168(defalias 'make-screen-visible 'make-frame-visible) 169;; (defalias 'minibuffer-screen-list 'minibuffer-frame-list) 170(defalias 'modify-screen-parameters 'modify-frame-parameters) 171(defalias 'next-screen 'next-frame) 172;; (defalias 'next-multiscreen-window 'next-multiframe-window) 173;; (defalias 'previous-multiscreen-window 'previous-multiframe-window) 174;; (defalias 'redirect-screen-focus 'redirect-frame-focus) 175(defalias 'redraw-screen 'redraw-frame) 176;; (defalias 'screen-char-height 'frame-char-height) 177;; (defalias 'screen-char-width 'frame-char-width) 178;; (defalias 'screen-configuration-to-register 'frame-configuration-to-register) 179;; (defalias 'screen-focus 'frame-focus) 180(defalias 'screen-list 'frame-list) 181;; (defalias 'screen-live-p 'frame-live-p) 182(defalias 'screen-parameters 'frame-parameters) 183(defalias 'screen-pixel-height 'frame-pixel-height) 184(defalias 'screen-pixel-width 'frame-pixel-width) 185(defalias 'screen-root-window 'frame-root-window) 186(defalias 'screen-selected-window 'frame-selected-window) 187(defalias 'lower-screen 'lower-frame) 188(defalias 'raise-screen 'raise-frame) 189(defalias 'screen-visible-p 'frame-visible-p) 190(defalias 'screenp 'framep) 191(defalias 'select-screen 'select-frame) 192(defalias 'selected-screen 'selected-frame) 193;; (defalias 'set-screen-configuration 'set-frame-configuration) 194;; (defalias 'set-screen-height 'set-frame-height) 195(defalias 'set-screen-position 'set-frame-position) 196(defalias 'set-screen-size 'set-frame-size) 197;; (defalias 'set-screen-width 'set-frame-width) 198(defalias 'switch-to-buffer-new-screen 'switch-to-buffer-other-frame) 199;; (defalias 'unfocus-screen 'unfocus-frame) 200(defalias 'visible-screen-list 'visible-frame-list) 201(defalias 'window-screen 'window-frame) 202(defalias 'x-create-screen 'x-create-frame) 203(defalias 'x-new-screen 'make-frame) 204 205(provide 'lucid) 206 207;; Local Variables: 208;; byte-compile-warnings: (not cl-functions) 209;; End: 210 211;;; lucid.el ends here 212