[bpt/emacs.git] / lisp / emacs-lisp / lucid.el

;;; lucid.el --- emulate some Lucid Emacs functions

;; Copyright (C) 1993, 1995, 2001 Free Software Foundation, Inc.

;; Maintainer: FSF
;; Keywords: emulations

;; 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 2, 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:

;;; Code:

;; XEmacs autoloads CL so we might as well make use of it.
(require 'cl)

(defalias 'current-time-seconds 'current-time)

(defun read-number (prompt &optional integers-only)
  "Read a number from the minibuffer.
Keep reentering the minibuffer until we get suitable input.
If optional argument INTEGERS-ONLY is non-nil, insist on an integer."
  (interactive)
  (let (success
	(number nil)
	(predicate (if integers-only 'integerp 'numberp)))
    (while (not success)
      (let ((input-string (read-string prompt)))
	(condition-case ()
	    (setq number (read input-string))
	  (error))
	(if (funcall predicate number)
	    (setq success t)
	  (let ((cursor-in-echo-area t))
	    (message "Please type %s"
		     (if integers-only "an integer" "a number"))
	    (sit-for 1)))))
    number))

(defun real-path-name (name &optional default)
  (file-truename (expand-file-name name default)))

;; It's not clear what to return if the mouse is not in FRAME.
(defun read-mouse-position (frame)
  (let ((pos (mouse-position)))
    (if (eq (car pos) frame)
	(cdr pos))))

(defun switch-to-other-buffer (arg)
  "Switch to the previous buffer.
With a numeric arg N, switch to the Nth most recent buffer.
With an arg of 0, buries the current buffer at the
bottom of the buffer stack."
  (interactive "p")
  (if (eq arg 0)
      (bury-buffer (current-buffer)))
  (switch-to-buffer
   (if (<= arg 1) (other-buffer (current-buffer))
     (nth arg
	  (apply 'nconc
		 (mapcar
		  (lambda (buf)
		    (if (= ?\  (string-to-char (buffer-name buf)))
			nil
		      (list buf)))
		  (buffer-list)))))))

(defun device-class (&optional device)
  "Return the class (color behavior) of DEVICE.
This will be one of 'color, 'grayscale, or 'mono.
This function exists for compatibility with XEmacs."
  (cond
   ((display-color-p device) 'color)
   ((display-grayscale-p device) 'grayscale)
   (t 'mono)))

(defalias 'find-face 'internal-find-face)
(defalias 'get-face 'internal-get-face)
(defalias 'try-face-font 'internal-try-face-font)

(defalias 'exec-to-string 'shell-command-to-string)
\f

;; Buffer context

(defun buffer-syntactic-context (&optional buffer)
  "Syntactic context at point in BUFFER.
Either of `string', `comment' or nil.
This is an XEmacs compatibility function."
  (with-current-buffer (or buffer (current-buffer))
    (let ((state (syntax-ppss (point))))
      (cond
       ((nth 3 state) 'string)
       ((nth 4 state) 'comment)))))


(defun buffer-syntactic-context-depth (&optional buffer)
  "Syntactic parenthesis depth at point in BUFFER.
This is an XEmacs compatibility function."
  (with-current-buffer (or buffer (current-buffer))
    (nth 0 (syntax-ppss (point)))))


;; Extents
(defun make-extent (beg end &optional buffer)
  (make-overlay beg end buffer))

(defun extent-properties (extent) (overlay-properties extent))
(unless (fboundp 'extent-property) (defalias 'extent-property 'overlay-get))

(defun extent-at (pos &optional object property before)
  (with-current-buffer (or object (current-buffer))
    (let ((overlays (overlays-at pos)))
      (when property
	(let (filtered)
	  (while overlays
	    (if (overlay-get (car overlays) property)
		(setq filtered (cons (car overlays) filtered)))
	    (setq overlays (cdr overlays)))
	  (setq overlays filtered)))
      (setq overlays
	    (sort overlays
		  (function (lambda (o1 o2)
			      (let ((p1 (or (overlay-get o1 'priority) 0))
				    (p2 (or (overlay-get o2 'priority) 0)))
				(or (> p1 p2)
				    (and (= p1 p2)
					 (> (overlay-start o1) (overlay-start o2)))))))))
      (if before
	  (nth 1 (memq before overlays))
	(car overlays)))))

(defun set-extent-property (extent prop value)
  ;; Make sure that separate adjacent extents
  ;; with the same mouse-face value
  ;; do not run together as one extent.
  (and (eq prop 'mouse-face)
       (symbolp value)
       (setq value (list value)))
  (if (eq prop 'duplicable)
      (cond ((and value (not (overlay-get extent prop)))
	     ;; If becoming duplicable, copy all overlayprops to text props.
	     (add-text-properties (overlay-start extent)
				  (overlay-end extent)
				  (overlay-properties extent)
				  (overlay-buffer extent)))
	    ;; If becoming no longer duplicable, remove these text props.
	    ((and (not value) (overlay-get extent prop))
	     (remove-text-properties (overlay-start extent)
				     (overlay-end extent)
				     (overlay-properties extent)
				     (overlay-buffer extent))))
    ;; If extent is already duplicable, put this property
    ;; on the text as well as on the overlay.
    (if (overlay-get extent 'duplicable)
	(put-text-property  (overlay-start extent)
			    (overlay-end extent)
			    prop value (overlay-buffer extent))))
  (overlay-put extent prop value))

(defun set-extent-face (extent face)
  (set-extent-property extent 'face face))

(defun set-extent-end-glyph (extent glyph)
  (set-extent-property extent 'after-string glyph))

(defun delete-extent (extent)
  (set-extent-property extent 'duplicable nil)
  (delete-overlay extent))
\f
;; Support the Lucid names with `screen' instead of `frame'.

(defalias 'current-screen-configuration 'current-frame-configuration)
(defalias 'delete-screen 'delete-frame)
(defalias 'find-file-new-screen 'find-file-other-frame)
(defalias 'find-file-read-only-new-screen 'find-file-read-only-other-frame)
(defalias 'find-tag-new-screen 'find-tag-other-frame)
;;(defalias 'focus-screen 'focus-frame)
(defalias 'iconify-screen 'iconify-frame)
(defalias 'mail-new-screen 'mail-other-frame)
(defalias 'make-screen-invisible 'make-frame-invisible)
(defalias 'make-screen-visible 'make-frame-visible)
;; (defalias 'minibuffer-screen-list 'minibuffer-frame-list)
(defalias 'modify-screen-parameters 'modify-frame-parameters)
(defalias 'next-screen 'next-frame)
;; (defalias 'next-multiscreen-window 'next-multiframe-window)
;; (defalias 'previous-multiscreen-window 'previous-multiframe-window)
;; (defalias 'redirect-screen-focus 'redirect-frame-focus)
(defalias 'redraw-screen 'redraw-frame)
;; (defalias 'screen-char-height 'frame-char-height)
;; (defalias 'screen-char-width 'frame-char-width)
;; (defalias 'screen-configuration-to-register 'frame-configuration-to-register)
;; (defalias 'screen-focus 'frame-focus)
(defalias 'screen-list 'frame-list)
;; (defalias 'screen-live-p 'frame-live-p)
(defalias 'screen-parameters 'frame-parameters)
(defalias 'screen-pixel-height 'frame-pixel-height)
(defalias 'screen-pixel-width 'frame-pixel-width)
(defalias 'screen-root-window 'frame-root-window)
(defalias 'screen-selected-window 'frame-selected-window)
(defalias 'lower-screen 'lower-frame)
(defalias 'raise-screen 'raise-frame)
(defalias 'screen-visible-p 'frame-visible-p)
(defalias 'screenp 'framep)
(defalias 'select-screen 'select-frame)
(defalias 'selected-screen 'selected-frame)
;; (defalias 'set-screen-configuration 'set-frame-configuration)
;; (defalias 'set-screen-height 'set-frame-height)
(defalias 'set-screen-position 'set-frame-position)
(defalias 'set-screen-size 'set-frame-size)
;; (defalias 'set-screen-width 'set-frame-width)
(defalias 'switch-to-buffer-new-screen 'switch-to-buffer-other-frame)
;; (defalias 'unfocus-screen 'unfocus-frame)
(defalias 'visible-screen-list 'visible-frame-list)
(defalias 'window-screen 'window-frame)
(defalias 'x-create-screen 'x-create-frame)
(defalias 'x-new-screen 'make-frame)

(provide 'lucid)

;;; arch-tag: 80f9ab46-0b36-4151-86ed-3edb6d449c9e
;;; lucid.el ends here
Commit	Line	Data
60370d40	1	;;; lucid.el --- emulate some Lucid Emacs functions
b578f267	2
284b3043	3	;; Copyright (C) 1993, 1995, 2001 Free Software Foundation, Inc.
6de6752c	4
070c251e	5	;; Maintainer: FSF
284b3043	6	;; Keywords: emulations
070c251e	7
6de6752c RS	8	;; This file is part of GNU Emacs.
	9
	10	;; GNU Emacs is free software; you can redistribute it and/or modify
	11	;; it under the terms of the GNU General Public License as published by
	12	;; the Free Software Foundation; either version 2, or (at your option)
	13	;; any later version.
	14
	15	;; GNU Emacs is distributed in the hope that it will be useful,
	16	;; but WITHOUT ANY WARRANTY; without even the implied warranty of
	17	;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	18	;; GNU General Public License for more details.
	19
	20	;; You should have received a copy of the GNU General Public License
b578f267	21	;; along with GNU Emacs; see the file COPYING. If not, write to the
3a35cf56 LK	22	;; Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
3a35cf56 LK	23	;; Boston, MA 02110-1301, USA.
6de6752c	24
60370d40 PJ	25	;;; Commentary:
60370d40 PJ	26
b578f267	27	;;; Code:
6de6752c	28
5e2dfaa4 SM	29	;; XEmacs autoloads CL so we might as well make use of it.
5e2dfaa4 SM	30	(require 'cl)
330fba95	31
31e1d920	32	(defalias 'current-time-seconds 'current-time)
330fba95	33
3b787dc3 RS	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
7d18d35c JB	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))
7c7daa22	74	(nth arg
e084483d JB	75	(apply 'nconc
	76	(mapcar
	77	(lambda (buf)
0b9be2e7	78	(if (= ?\ (string-to-char (buffer-name buf)))
e084483d	79	nil
0b9be2e7 JB	80	(list buf)))
0b9be2e7 JB	81	(buffer-list)))))))
e15765f5	82
efcc2791 SM	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
31e1d920 ER	92	(defalias 'find-face 'internal-find-face)
	93	(defalias 'get-face 'internal-get-face)
	94	(defalias 'try-face-font 'internal-try-face-font)
6b4268b0 RS	95
6b4268b0 RS	96	(defalias 'exec-to-string 'shell-command-to-string)
7d18d35c	97	\f
efcc2791 SM	98
	99	;; Buffer context
	100
	101	(defun buffer-syntactic-context (&optional buffer)
	102	"Syntactic context at point in BUFFER.
89a5038d	103	Either of `string', `comment' or nil.
efcc2791 SM	104	This is an XEmacs compatibility function."
	105	(with-current-buffer (or buffer (current-buffer))
	106	(let ((state (syntax-ppss (point))))
	107	(cond
	108	((nth 3 state) 'string)
	109	((nth 4 state) 'comment)))))
	110
	111
	112	(defun buffer-syntactic-context-depth (&optional buffer)
	113	"Syntactic parenthesis depth at point in BUFFER.
	114	This is an XEmacs compatibility function."
	115	(with-current-buffer (or buffer (current-buffer))
	116	(nth 0 (syntax-ppss (point)))))
	117
	118
	119	;; Extents
51566783 RS	120	(defun make-extent (beg end &optional buffer)
	121	(make-overlay beg end buffer))
	122
5e2dfaa4 SM	123	(defun extent-properties (extent) (overlay-properties extent))
5e2dfaa4 SM	124	(unless (fboundp 'extent-property) (defalias 'extent-property 'overlay-get))
c9411d2f RS	125
	126	(defun extent-at (pos &optional object property before)
	127	(with-current-buffer (or object (current-buffer))
	128	(let ((overlays (overlays-at pos)))
	129	(when property
	130	(let (filtered)
	131	(while overlays
	132	(if (overlay-get (car overlays) property)
	133	(setq filtered (cons (car overlays) filtered)))
	134	(setq overlays (cdr overlays)))
	135	(setq overlays filtered)))
	136	(setq overlays
	137	(sort overlays
	138	(function (lambda (o1 o2)
	139	(let ((p1 (or (overlay-get o1 'priority) 0))
	140	(p2 (or (overlay-get o2 'priority) 0)))
	141	(or (> p1 p2)
	142	(and (= p1 p2)
	143	(> (overlay-start o1) (overlay-start o2)))))))))
	144	(if before
	145	(nth 1 (memq before overlays))
	146	(car overlays)))))
	147
51566783	148	(defun set-extent-property (extent prop value)
c27d895b RS	149	;; Make sure that separate adjacent extents
	150	;; with the same mouse-face value
	151	;; do not run together as one extent.
	152	(and (eq prop 'mouse-face)
	153	(symbolp value)
	154	(setq value (list value)))
51566783 RS	155	(if (eq prop 'duplicable)
	156	(cond ((and value (not (overlay-get extent prop)))
	157	;; If becoming duplicable, copy all overlayprops to text props.
	158	(add-text-properties (overlay-start extent)
	159	(overlay-end extent)
	160	(overlay-properties extent)
	161	(overlay-buffer extent)))
	162	;; If becoming no longer duplicable, remove these text props.
	163	((and (not value) (overlay-get extent prop))
	164	(remove-text-properties (overlay-start extent)
	165	(overlay-end extent)
	166	(overlay-properties extent)
	167	(overlay-buffer extent))))
	168	;; If extent is already duplicable, put this property
	169	;; on the text as well as on the overlay.
	170	(if (overlay-get extent 'duplicable)
	171	(put-text-property (overlay-start extent)
	172	(overlay-end extent)
	173	prop value (overlay-buffer extent))))
	174	(overlay-put extent prop value))
	175
	176	(defun set-extent-face (extent face)
	177	(set-extent-property extent 'face face))
	178
5e2dfaa4 SM	179	(defun set-extent-end-glyph (extent glyph)
	180	(set-extent-property extent 'after-string glyph))
	181
51566783 RS	182	(defun delete-extent (extent)
	183	(set-extent-property extent 'duplicable nil)
	184	(delete-overlay extent))
	185	\f
7d18d35c JB	186	;; Support the Lucid names with `screen' instead of `frame'.
7d18d35c JB	187
31e1d920 ER	188	(defalias 'current-screen-configuration 'current-frame-configuration)
	189	(defalias 'delete-screen 'delete-frame)
	190	(defalias 'find-file-new-screen 'find-file-other-frame)
	191	(defalias 'find-file-read-only-new-screen 'find-file-read-only-other-frame)
	192	(defalias 'find-tag-new-screen 'find-tag-other-frame)
	193	;;(defalias 'focus-screen 'focus-frame)
	194	(defalias 'iconify-screen 'iconify-frame)
	195	(defalias 'mail-new-screen 'mail-other-frame)
	196	(defalias 'make-screen-invisible 'make-frame-invisible)
	197	(defalias 'make-screen-visible 'make-frame-visible)
	198	;; (defalias 'minibuffer-screen-list 'minibuffer-frame-list)
	199	(defalias 'modify-screen-parameters 'modify-frame-parameters)
	200	(defalias 'next-screen 'next-frame)
	201	;; (defalias 'next-multiscreen-window 'next-multiframe-window)
	202	;; (defalias 'previous-multiscreen-window 'previous-multiframe-window)
	203	;; (defalias 'redirect-screen-focus 'redirect-frame-focus)
	204	(defalias 'redraw-screen 'redraw-frame)
	205	;; (defalias 'screen-char-height 'frame-char-height)
	206	;; (defalias 'screen-char-width 'frame-char-width)
	207	;; (defalias 'screen-configuration-to-register 'frame-configuration-to-register)
	208	;; (defalias 'screen-focus 'frame-focus)
31e1d920 ER	209	(defalias 'screen-list 'frame-list)
	210	;; (defalias 'screen-live-p 'frame-live-p)
	211	(defalias 'screen-parameters 'frame-parameters)
	212	(defalias 'screen-pixel-height 'frame-pixel-height)
	213	(defalias 'screen-pixel-width 'frame-pixel-width)
	214	(defalias 'screen-root-window 'frame-root-window)
	215	(defalias 'screen-selected-window 'frame-selected-window)
	216	(defalias 'lower-screen 'lower-frame)
	217	(defalias 'raise-screen 'raise-frame)
	218	(defalias 'screen-visible-p 'frame-visible-p)
31e1d920 ER	219	(defalias 'screenp 'framep)
	220	(defalias 'select-screen 'select-frame)
	221	(defalias 'selected-screen 'selected-frame)
	222	;; (defalias 'set-screen-configuration 'set-frame-configuration)
	223	;; (defalias 'set-screen-height 'set-frame-height)
	224	(defalias 'set-screen-position 'set-frame-position)
	225	(defalias 'set-screen-size 'set-frame-size)
e084483d	226	;; (defalias 'set-screen-width 'set-frame-width)
31e1d920 ER	227	(defalias 'switch-to-buffer-new-screen 'switch-to-buffer-other-frame)
	228	;; (defalias 'unfocus-screen 'unfocus-frame)
	229	(defalias 'visible-screen-list 'visible-frame-list)
	230	(defalias 'window-screen 'window-frame)
	231	(defalias 'x-create-screen 'x-create-frame)
c731cd93	232	(defalias 'x-new-screen 'make-frame)
6de6752c	233
e084483d JB	234	(provide 'lucid)
e084483d JB	235
ab5796a9	236	;;; arch-tag: 80f9ab46-0b36-4151-86ed-3edb6d449c9e
60370d40	237	;;; lucid.el ends here