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

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

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

;; 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., 59 Temple Place - Suite 330,
;; Boston, MA 02111-1307, USA.

;;; Code:

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

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

(defun map-keymap (function keymap &optional sort-first)
  "Call FUNCTION for every binding in KEYMAP.
This does not include bindings inherited from a parent keymap.
FUNCTION receives two arguments each time it is called:
the character (more generally, the event type) that is bound,
and the binding it has.

Note that passing the event type directly to `define-key' does not work
in Emacs 19.  We do not emulate that particular feature of Lucid Emacs.
If your code does that, modify it to make a vector containing the event
type that you get.  That will work in both versions of Emacs."
  (if sort-first
      (let (list)
	(cl-map-keymap (lambda (a b) (push (cons a b) list))
		       keymap)
	(setq list (sort list
			 (lambda (a b)
			   (setq a (car a) b (car b))
			   (if (integerp a)
			       (if (integerp b) (< a b)
				 t)
			     (if (integerp b) t
			       (string< a b))))))
	(dolist (p list)
	  (funcall function (car p) (cdr p))))
    (cl-map-keymap function keymap)))

(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)))))))

(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
(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)

;;; end of lucid.el
Commit	Line	Data
6de6752c	1	;;; lucid.el --- Emulate some Lucid Emacs functions.
b578f267	2
f8c25f1b	3	;; Copyright (C) 1993, 1995 Free Software Foundation, Inc.
6de6752c RS	4
	5	;; This file is part of GNU Emacs.
	6
	7	;; GNU Emacs is free software; you can redistribute it and/or modify
	8	;; it under the terms of the GNU General Public License as published by
	9	;; the Free Software Foundation; either version 2, or (at your option)
	10	;; any later version.
	11
	12	;; GNU Emacs is distributed in the hope that it will be useful,
	13	;; but WITHOUT ANY WARRANTY; without even the implied warranty of
	14	;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	15	;; GNU General Public License for more details.
	16
	17	;; You should have received a copy of the GNU General Public License
b578f267 EN	18	;; along with GNU Emacs; see the file COPYING. If not, write to the
	19	;; Free Software Foundation, Inc., 59 Temple Place - Suite 330,
	20	;; Boston, MA 02111-1307, USA.
6de6752c	21
b578f267	22	;;; Code:
6de6752c	23
5e2dfaa4 SM	24	;; XEmacs autoloads CL so we might as well make use of it.
5e2dfaa4 SM	25	(require 'cl)
330fba95	26
31e1d920	27	(defalias 'current-time-seconds 'current-time)
330fba95	28
7d18d35c	29	(defun map-keymap (function keymap &optional sort-first)
3e6580d0	30	"Call FUNCTION for every binding in KEYMAP.
5e2dfaa4	31	This does not include bindings inherited from a parent keymap.
3e6580d0 JB	32	FUNCTION receives two arguments each time it is called:
3e6580d0 JB	33	the character (more generally, the event type) that is bound,
aef4422e RS	34	and the binding it has.
	35
	36	Note that passing the event type directly to `define-key' does not work
	37	in Emacs 19. We do not emulate that particular feature of Lucid Emacs.
	38	If your code does that, modify it to make a vector containing the event
	39	type that you get. That will work in both versions of Emacs."
7d18d35c JB	40	(if sort-first
7d18d35c JB	41	(let (list)
5e2dfaa4 SM	42	(cl-map-keymap (lambda (a b) (push (cons a b) list))
5e2dfaa4 SM	43	keymap)
7d18d35c	44	(setq list (sort list
5e2dfaa4 SM	45	(lambda (a b)
	46	(setq a (car a) b (car b))
	47	(if (integerp a)
	48	(if (integerp b) (< a b)
	49	t)
	50	(if (integerp b) t
	51	(string< a b))))))
	52	(dolist (p list)
	53	(funcall function (car p) (cdr p))))
	54	(cl-map-keymap function keymap)))
7d18d35c	55
3b787dc3 RS	56	(defun read-number (prompt &optional integers-only)
	57	"Read a number from the minibuffer.
	58	Keep reentering the minibuffer until we get suitable input.
	59	If optional argument INTEGERS-ONLY is non-nil, insist on an integer."
	60	(interactive)
	61	(let (success
	62	(number nil)
	63	(predicate (if integers-only 'integerp 'numberp)))
	64	(while (not success)
	65	(let ((input-string (read-string prompt)))
	66	(condition-case ()
	67	(setq number (read input-string))
	68	(error))
	69	(if (funcall predicate number)
	70	(setq success t)
	71	(let ((cursor-in-echo-area t))
	72	(message "Please type %s"
	73	(if integers-only "an integer" "a number"))
	74	(sit-for 1)))))
	75	number))
	76
7d18d35c JB	77	(defun real-path-name (name &optional default)
	78	(file-truename (expand-file-name name default)))
	79
	80	;; It's not clear what to return if the mouse is not in FRAME.
	81	(defun read-mouse-position (frame)
	82	(let ((pos (mouse-position)))
	83	(if (eq (car pos) frame)
	84	(cdr pos))))
	85
	86	(defun switch-to-other-buffer (arg)
	87	"Switch to the previous buffer.
	88	With a numeric arg N, switch to the Nth most recent buffer.
	89	With an arg of 0, buries the current buffer at the
	90	bottom of the buffer stack."
	91	(interactive "p")
	92	(if (eq arg 0)
	93	(bury-buffer (current-buffer)))
	94	(switch-to-buffer
	95	(if (<= arg 1) (other-buffer (current-buffer))
7c7daa22	96	(nth arg
e084483d JB	97	(apply 'nconc
	98	(mapcar
	99	(lambda (buf)
0b9be2e7	100	(if (= ?\ (string-to-char (buffer-name buf)))
e084483d	101	nil
0b9be2e7 JB	102	(list buf)))
0b9be2e7 JB	103	(buffer-list)))))))
e15765f5	104
31e1d920 ER	105	(defalias 'find-face 'internal-find-face)
	106	(defalias 'get-face 'internal-get-face)
	107	(defalias 'try-face-font 'internal-try-face-font)
6b4268b0 RS	108
6b4268b0 RS	109	(defalias 'exec-to-string 'shell-command-to-string)
7d18d35c	110	\f
51566783 RS	111	(defun make-extent (beg end &optional buffer)
	112	(make-overlay beg end buffer))
	113
5e2dfaa4 SM	114	(defun extent-properties (extent) (overlay-properties extent))
5e2dfaa4 SM	115	(unless (fboundp 'extent-property) (defalias 'extent-property 'overlay-get))
c9411d2f RS	116
	117	(defun extent-at (pos &optional object property before)
	118	(with-current-buffer (or object (current-buffer))
	119	(let ((overlays (overlays-at pos)))
	120	(when property
	121	(let (filtered)
	122	(while overlays
	123	(if (overlay-get (car overlays) property)
	124	(setq filtered (cons (car overlays) filtered)))
	125	(setq overlays (cdr overlays)))
	126	(setq overlays filtered)))
	127	(setq overlays
	128	(sort overlays
	129	(function (lambda (o1 o2)
	130	(let ((p1 (or (overlay-get o1 'priority) 0))
	131	(p2 (or (overlay-get o2 'priority) 0)))
	132	(or (> p1 p2)
	133	(and (= p1 p2)
	134	(> (overlay-start o1) (overlay-start o2)))))))))
	135	(if before
	136	(nth 1 (memq before overlays))
	137	(car overlays)))))
	138
51566783	139	(defun set-extent-property (extent prop value)
c27d895b RS	140	;; Make sure that separate adjacent extents
	141	;; with the same mouse-face value
	142	;; do not run together as one extent.
	143	(and (eq prop 'mouse-face)
	144	(symbolp value)
	145	(setq value (list value)))
51566783 RS	146	(if (eq prop 'duplicable)
	147	(cond ((and value (not (overlay-get extent prop)))
	148	;; If becoming duplicable, copy all overlayprops to text props.
	149	(add-text-properties (overlay-start extent)
	150	(overlay-end extent)
	151	(overlay-properties extent)
	152	(overlay-buffer extent)))
	153	;; If becoming no longer duplicable, remove these text props.
	154	((and (not value) (overlay-get extent prop))
	155	(remove-text-properties (overlay-start extent)
	156	(overlay-end extent)
	157	(overlay-properties extent)
	158	(overlay-buffer extent))))
	159	;; If extent is already duplicable, put this property
	160	;; on the text as well as on the overlay.
	161	(if (overlay-get extent 'duplicable)
	162	(put-text-property (overlay-start extent)
	163	(overlay-end extent)
	164	prop value (overlay-buffer extent))))
	165	(overlay-put extent prop value))
	166
	167	(defun set-extent-face (extent face)
	168	(set-extent-property extent 'face face))
	169
5e2dfaa4 SM	170	(defun set-extent-end-glyph (extent glyph)
	171	(set-extent-property extent 'after-string glyph))
	172
51566783 RS	173	(defun delete-extent (extent)
	174	(set-extent-property extent 'duplicable nil)
	175	(delete-overlay extent))
	176	\f
7d18d35c JB	177	;; Support the Lucid names with `screen' instead of `frame'.
7d18d35c JB	178
31e1d920 ER	179	(defalias 'current-screen-configuration 'current-frame-configuration)
	180	(defalias 'delete-screen 'delete-frame)
	181	(defalias 'find-file-new-screen 'find-file-other-frame)
	182	(defalias 'find-file-read-only-new-screen 'find-file-read-only-other-frame)
	183	(defalias 'find-tag-new-screen 'find-tag-other-frame)
	184	;;(defalias 'focus-screen 'focus-frame)
	185	(defalias 'iconify-screen 'iconify-frame)
	186	(defalias 'mail-new-screen 'mail-other-frame)
	187	(defalias 'make-screen-invisible 'make-frame-invisible)
	188	(defalias 'make-screen-visible 'make-frame-visible)
	189	;; (defalias 'minibuffer-screen-list 'minibuffer-frame-list)
	190	(defalias 'modify-screen-parameters 'modify-frame-parameters)
	191	(defalias 'next-screen 'next-frame)
	192	;; (defalias 'next-multiscreen-window 'next-multiframe-window)
	193	;; (defalias 'previous-multiscreen-window 'previous-multiframe-window)
	194	;; (defalias 'redirect-screen-focus 'redirect-frame-focus)
	195	(defalias 'redraw-screen 'redraw-frame)
	196	;; (defalias 'screen-char-height 'frame-char-height)
	197	;; (defalias 'screen-char-width 'frame-char-width)
	198	;; (defalias 'screen-configuration-to-register 'frame-configuration-to-register)
	199	;; (defalias 'screen-focus 'frame-focus)
31e1d920 ER	200	(defalias 'screen-list 'frame-list)
	201	;; (defalias 'screen-live-p 'frame-live-p)
	202	(defalias 'screen-parameters 'frame-parameters)
	203	(defalias 'screen-pixel-height 'frame-pixel-height)
	204	(defalias 'screen-pixel-width 'frame-pixel-width)
	205	(defalias 'screen-root-window 'frame-root-window)
	206	(defalias 'screen-selected-window 'frame-selected-window)
	207	(defalias 'lower-screen 'lower-frame)
	208	(defalias 'raise-screen 'raise-frame)
	209	(defalias 'screen-visible-p 'frame-visible-p)
31e1d920 ER	210	(defalias 'screenp 'framep)
	211	(defalias 'select-screen 'select-frame)
	212	(defalias 'selected-screen 'selected-frame)
	213	;; (defalias 'set-screen-configuration 'set-frame-configuration)
	214	;; (defalias 'set-screen-height 'set-frame-height)
	215	(defalias 'set-screen-position 'set-frame-position)
	216	(defalias 'set-screen-size 'set-frame-size)
e084483d	217	;; (defalias 'set-screen-width 'set-frame-width)
31e1d920 ER	218	(defalias 'switch-to-buffer-new-screen 'switch-to-buffer-other-frame)
	219	;; (defalias 'unfocus-screen 'unfocus-frame)
	220	(defalias 'visible-screen-list 'visible-frame-list)
	221	(defalias 'window-screen 'window-frame)
	222	(defalias 'x-create-screen 'x-create-frame)
c731cd93	223	(defalias 'x-new-screen 'make-frame)
6de6752c	224
e084483d JB	225	(provide 'lucid)
e084483d JB	226
6de6752c	227	;;; end of lucid.el