1 ;;; pc-win.el --- setup support for `PC windows' (whatever that is)
3 ;; Copyright (C) 1994, 1996-1997, 1999, 2001-2013 Free Software
6 ;; Author: Morten Welinder <terra@diku.dk>
9 ;; This file is part of GNU Emacs.
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.
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.
21 ;; You should have received a copy of the GNU General Public License
22 ;; along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>.
26 ;; This file is preloaded into Emacs by loadup.el. The functions in
27 ;; this file are then called during startup from startup.el. This
28 ;; means that just loading this file should not have any side effects
29 ;; besides defining functions and variables, and in particular should
30 ;; NOT initialize any window systems.
32 ;; The main entry points to this file's features are msdos-handle-args,
33 ;; msdos-create-frame-with-faces, msdos-initialize-window-system,
34 ;; terminal-init-internal. The last one is not supposed to be called,
35 ;; so it just errors out.
39 (if (not (fboundp 'msdos-remember-default-colors
))
40 (error "%s: Loading pc-win.el but not compiled for MS-DOS"
43 (declare-function msdos-remember-default-colors
"msdos.c")
44 (declare-function w16-set-clipboard-data
"w16select.c")
45 (declare-function w16-get-clipboard-data
"w16select.c")
46 (declare-function msdos-setup-keyboard
"internal" (frame))
48 ;;; This was copied from etc/rgb.txt, except that some values were changed
49 ;;; a bit to make them consistent with DOS console colors, and the RGB
50 ;;; values were scaled up to 16 bits, as `tty-define-color' requires.
52 ;;; The mapping between the 16 standard EGA/VGA colors and X color names
53 ;;; was done by running a Unix version of Emacs inside an X client and a
54 ;;; DJGPP-compiled Emacs on the same PC. The names of X colors used to
55 ;;; define the pixel values are shown as comments to each color below.
57 ;;; If you want to change the RGB values, keep in mind that various pieces
58 ;;; of Emacs think that a color whose RGB values add up to less than 0.6 of
59 ;;; the values for WHITE (i.e. less than 117963) are ``dark'', otherwise the
60 ;;; color is ``light''; see `frame-set-background-mode' in lisp/faces.el for
62 (defvar msdos-color-values
64 ("blue" 1 0 0 52480) ; MediumBlue
65 ("green" 2 8704 35584 8704) ; ForestGreen
66 ("cyan" 3 0 52736 53504) ; DarkTurquoise
67 ("red" 4 45568 8704 8704) ; FireBrick
68 ("magenta" 5 35584 0 35584) ; DarkMagenta
69 ("brown" 6 40960 20992 11520) ; Sienna
70 ("lightgray" 7 48640 48640 48640) ; Gray
71 ("darkgray" 8 26112 26112 26112) ; Gray40
72 ("lightblue" 9 0 0 65535) ; Blue
73 ("lightgreen" 10 0 65535 0) ; Green
74 ("lightcyan" 11 0 65535 65535) ; Cyan
75 ("lightred" 12 65535 0 0) ; Red
76 ("lightmagenta" 13 65535 0 65535) ; Magenta
77 ("yellow" 14 65535 65535 0) ; Yellow
78 ("white" 15 65535 65535 65535))
79 "A list of MS-DOS console colors, their indices and 16-bit RGB values.")
81 ;; ---------------------------------------------------------------------------
82 ;; We want to delay setting frame parameters until the faces are setup
83 (defvar default-frame-alist nil
)
84 ;(modify-frame-parameters terminal-frame default-frame-alist)
86 (defun msdos-face-setup ()
87 "Initial setup of faces for the MS-DOS display."
88 (set-face-foreground 'bold
"yellow")
89 (set-face-foreground 'italic
"red")
90 (set-face-foreground 'bold-italic
"lightred")
91 (set-face-foreground 'underline
"white")
93 (make-face 'msdos-menu-active-face
)
94 (make-face 'msdos-menu-passive-face
)
95 (make-face 'msdos-menu-select-face
)
96 (set-face-foreground 'msdos-menu-active-face
"white")
97 (set-face-foreground 'msdos-menu-passive-face
"lightgray")
98 (set-face-background 'msdos-menu-active-face
"blue")
99 (set-face-background 'msdos-menu-passive-face
"blue")
100 (set-face-background 'msdos-menu-select-face
"red"))
102 (defun msdos-handle-reverse-video (frame parameters
)
103 "Handle the reverse-video frame parameter on MS-DOS frames."
104 (when (cdr (or (assq 'reverse parameters
)
105 (assq 'reverse default-frame-alist
)))
106 (let* ((params (frame-parameters frame
))
107 (fg (cdr (assq 'foreground-color params
)))
108 (bg (cdr (assq 'background-color params
))))
109 (if (equal fg
(cdr (assq 'mouse-color params
)))
110 (modify-frame-parameters frame
111 (list (cons 'mouse-color bg
))))
112 (if (equal fg
(cdr (assq 'cursor-color params
)))
113 (modify-frame-parameters frame
114 (list (cons 'cursor-color bg
)))))))
116 ;; This must run after all the default colors are inserted into
117 ;; tty-color-alist, since msdos-handle-reverse-video needs to know the
118 ;; actual frame colors.
119 (defun msdos-setup-initial-frame ()
120 (modify-frame-parameters terminal-frame default-frame-alist
)
121 ;; This remembers the screen colors after applying default-frame-alist,
122 ;; so that all subsequent frames could begin with those colors.
123 (msdos-remember-default-colors terminal-frame
)
124 (modify-frame-parameters terminal-frame initial-frame-alist
)
125 (msdos-handle-reverse-video terminal-frame
126 (frame-parameters terminal-frame
))
128 (frame-set-background-mode terminal-frame
)
129 (face-set-after-frame-default terminal-frame
))
131 ;; We create frames as if we were a terminal, but without invoking the
132 ;; terminal-initialization function. Also, our handling of reverse
133 ;; video is slightly different.
134 (defun msdos-create-frame-with-faces (&optional parameters
)
135 "Create a frame on MS-DOS display.
136 Optional frame parameters PARAMETERS specify the frame parameters.
137 Parameters not specified by PARAMETERS are taken from
138 `default-frame-alist'. If either PARAMETERS or `default-frame-alist'
139 contains a `reverse' parameter, handle that. Value is the new frame
141 (let ((frame (make-terminal-frame parameters
))
144 (with-selected-frame frame
145 (msdos-handle-reverse-video frame
(frame-parameters frame
))
146 (unless (terminal-parameter frame
'terminal-initted
)
147 (set-terminal-parameter frame
'terminal-initted t
))
148 (frame-set-background-mode frame
)
149 (face-set-after-frame-default frame
)
151 (unless success
(delete-frame frame
)))
154 ;; ---------------------------------------------------------------------------
155 ;; More or less useful imitations of certain X-functions. A lot of the
156 ;; values returned are questionable, but usually only the form of the
157 ;; returned value matters. Also, by the way, recall that `ignore' is
158 ;; a useful function for returning 'nil regardless of argument.
160 ;; Note: Any re-definition in this file of a function that is defined
161 ;; in C on other platforms, should either have no doc-string, or one
162 ;; that is identical to the C version, but with the arglist signature
163 ;; at the end. Otherwise help-split-fundoc gets confused on other
164 ;; platforms. (Bug#10783)
167 (defun x-list-fonts (pattern &optional face frame maximum width
)
168 (if (or (null width
) (and (numberp width
) (= width
1)))
170 (list "no-such-font")))
171 (defun x-display-pixel-width (&optional frame
) (frame-width frame
))
172 (defun x-display-pixel-height (&optional frame
) (frame-height frame
))
173 (defun x-display-planes (&optional frame
) 4) ;bg switched to 16 colors as well
174 (defun x-display-color-cells (&optional frame
) 16)
175 (defun x-server-max-request-size (&optional frame
) 1000000) ; ???
176 (defun x-server-vendor (&optional frame
) t
"GNU")
177 (defun x-server-version (&optional frame
) '(1 0 0))
178 (defun x-display-screens (&optional frame
) 1)
179 (defun x-display-mm-height (&optional frame
) 245) ; Guess the size of my
180 (defun x-display-mm-width (&optional frame
) 322) ; monitor, EZ...
181 (defun x-display-backing-store (&optional frame
) 'not-useful
)
182 (defun x-display-visual-class (&optional frame
) 'static-color
)
183 (fset 'x-display-save-under
'ignore
)
184 (fset 'x-get-resource
'ignore
)
186 ;; From lisp/term/x-win.el
187 (defvar x-display-name
"pc"
188 "The name of the window display on which Emacs was started.
189 On X, the display name of individual X frames is recorded in the
190 `display' frame parameter.")
191 (defvar x-colors
(mapcar 'car msdos-color-values
)
192 "List of basic colors available on color displays.
193 For X, the list comes from the `rgb.txt' file,v 10.41 94/02/20.
194 For Nextstep, this is a list of non-PANTONE colors returned by
195 the operating system.")
197 ;; From lisp/term/w32-win.el
201 ;;; We keep track of the last text selected here, so we can check the
202 ;;; current selection against it, and avoid passing back our own text
203 ;;; from x-selection-value.
204 (defvar x-last-selected-text nil
)
206 (defcustom x-select-enable-clipboard t
207 "Non-nil means cutting and pasting uses the clipboard.
208 This is in addition to, but in preference to, the primary selection.
210 Note that MS-Windows does not support selection types other than the
211 clipboard. (The primary selection that is set by Emacs is not
212 accessible to other programs on MS-Windows.)
214 This variable is not used by the Nextstep port."
218 (defun x-select-text (text)
219 "Select TEXT, a string, according to the window system.
221 On X, if `x-select-enable-clipboard' is non-nil, copy TEXT to the
222 clipboard. If `x-select-enable-primary' is non-nil, put TEXT in
223 the primary selection.
225 On MS-Windows, make TEXT the current selection. If
226 `x-select-enable-clipboard' is non-nil, copy the text to the
229 On Nextstep, put TEXT in the pasteboard (`x-select-enable-clipboard'
231 (if x-select-enable-clipboard
232 (w16-set-clipboard-data text
))
233 (setq x-last-selected-text text
))
235 ;;; Return the value of the current selection.
236 ;;; Consult the selection. Treat empty strings as if they were unset.
237 (defun x-get-selection-value ()
238 (if x-select-enable-clipboard
240 ;; Don't die if x-get-selection signals an error.
242 (setq text
(w16-get-clipboard-data))
243 (error (message "w16-get-clipboard-data:%s" c
)))
244 (if (string= text
"") (setq text nil
))
247 ((eq text x-last-selected-text
) nil
)
248 ((string= text x-last-selected-text
)
249 ;; Record the newer string, so subsequent calls can use the 'eq' test.
250 (setq x-last-selected-text text
)
253 (setq x-last-selected-text text
))))))
255 ;; x-selection-owner-p is used in simple.el.
256 (defun x-selection-owner-p (&optional selection terminal
)
257 "Whether the current Emacs process owns the given X Selection.
258 The arg should be the name of the selection in question, typically one of
259 the symbols `PRIMARY', `SECONDARY', or `CLIPBOARD'.
260 \(Those are literal upper-case symbol names, since that's what X expects.)
261 For convenience, the symbol nil is the same as `PRIMARY',
262 and t is the same as `SECONDARY'.
264 TERMINAL should be a terminal object or a frame specifying the X
265 server to query. If omitted or nil, that stands for the selected
266 frame's display, or the first available X display.
268 On Nextstep, TERMINAL is unused.
270 \(fn &optional SELECTION TERMINAL)"
271 (if x-select-enable-clipboard
273 ;; Don't die if w16-get-clipboard-data signals an error.
275 (setq text
(w16-get-clipboard-data)))
276 ;; We consider ourselves the owner of the selection if it does
277 ;; not exist, or exists and compares equal with the last text
278 ;; we've put into the Windows clipboard.
281 ((or (eq text x-last-selected-text
)
282 (string= text x-last-selected-text
))
286 ;; x-own-selection-internal and x-disown-selection-internal are used
287 ;; in select.el:x-set-selection.
288 (defun x-own-selection-internal (selection value
&optional frame
)
289 "Assert an X selection of the type SELECTION with and value VALUE.
290 SELECTION is a symbol, typically `PRIMARY', `SECONDARY', or `CLIPBOARD'.
291 \(Those are literal upper-case symbol names, since that's what X expects.)
292 VALUE is typically a string, or a cons of two markers, but may be
293 anything that the functions on `selection-converter-alist' know about.
295 FRAME should be a frame that should own the selection. If omitted or
296 nil, it defaults to the selected frame.
298 On Nextstep, FRAME is unused.
300 \(fn SELECTION VALUE &optional FRAME)"
302 (x-select-text value
))
305 (defun x-disown-selection-internal (selection &optional time-object terminal
)
306 "If we own the selection SELECTION, disown it.
307 Disowning it means there is no such selection.
309 Sets the last-change time for the selection to TIME-OBJECT (by default
310 the time of the last event).
312 TERMINAL should be a terminal object or a frame specifying the X
313 server to query. If omitted or nil, that stands for the selected
314 frame's display, or the first available X display.
316 On Nextstep, the TIME-OBJECT and TERMINAL arguments are unused.
317 On MS-DOS, all this does is return non-nil if we own the selection.
319 \(fn SELECTION &optional TIME-OBJECT TERMINAL)"
320 (if (x-selection-owner-p selection
)
323 ;; x-get-selection-internal is used in select.el
324 (defun x-get-selection-internal (selection-symbol target-type
&optional time-stamp terminal
)
325 "Return text selected from some X window.
326 SELECTION-SYMBOL is typically `PRIMARY', `SECONDARY', or `CLIPBOARD'.
327 \(Those are literal upper-case symbol names, since that's what X expects.)
328 TARGET-TYPE is the type of data desired, typically `STRING'.
330 TIME-STAMP is the time to use in the XConvertSelection call for foreign
331 selections. If omitted, defaults to the time for the last event.
333 TERMINAL should be a terminal object or a frame specifying the X
334 server to query. If omitted or nil, that stands for the selected
335 frame's display, or the first available X display.
337 On Nextstep, TIME-STAMP and TERMINAL are unused.
339 \(fn SELECTION-SYMBOL TARGET-TYPE &optional TIME-STAMP TERMINAL)"
340 (x-get-selection-value))
342 ;; From src/fontset.c:
343 (fset 'query-fontset
'ignore
)
345 ;; From lisp/term/x-win.el: make iconify-or-deiconify-frame a no-op.
346 (fset 'iconify-or-deiconify-frame
'ignore
)
348 ;; From lisp/frame.el
349 (fset 'set-default-font
'ignore
)
350 (fset 'set-mouse-color
'ignore
) ; We cannot, I think.
351 (fset 'set-cursor-color
'ignore
) ; Hardware determined by char under.
352 (fset 'set-border-color
'ignore
) ; Not useful.
354 (defvar msdos-last-help-message nil
355 "The last help message received via `show-help-function'.
356 This is used by `msdos-show-help'.")
358 (defvar msdos-previous-message nil
359 "The content of the echo area before help echo was displayed.")
361 (defun msdos-show-help (help)
362 "Function installed as `show-help-function' on MS-DOS frames."
363 (when (and (not (window-minibuffer-p)) ;Don't overwrite minibuffer contents.
364 (not cursor-in-echo-area
)) ;Don't overwrite a prompt.
367 (setq help
(replace-regexp-in-string "\n" ", " help
))
368 (unless (or msdos-previous-message
369 (string-equal help
(current-message))
370 (and (stringp msdos-last-help-message
)
371 (string-equal msdos-last-help-message
373 (setq msdos-previous-message
(current-message)))
374 (setq msdos-last-help-message help
)
375 (let ((message-truncate-lines nil
)
376 (message-log-max nil
))
377 (message "%s" help
)))
378 ((stringp msdos-previous-message
)
379 (let ((message-log-max nil
))
380 (message "%s" msdos-previous-message
)
381 (setq msdos-previous-message nil
)))
387 ;; ---------------------------------------------------------------------------
388 ;; This function is run, by faces.el:tty-create-frame-with-faces, only
389 ;; for the initial frame (on each terminal, but we have only one).
390 ;; This works by setting the `terminal-initted' terminal parameter to
391 ;; this function, the first time `tty-create-frame-with-faces' is
392 ;; called on that terminal. `tty-create-frame-with-faces' is called
393 ;; directly from startup.el and also by `make-frame' through
394 ;; `frame-creation-function-alist'. `make-frame' will call this
395 ;; function if `msdos-create-frame-with-faces' (see below) is not
396 ;; found in `frame-creation-function-alist', which means something is
397 ;; _very_ wrong, because "internal" terminal emulator should not be
398 ;; turned on if our window-system is not `pc'. Therefore, the only
399 ;; Right Thing for us to do here is scream bloody murder.
400 (defun terminal-init-internal ()
401 "Terminal initialization function for the MS-DOS \"internal\" terminal.
402 Errors out because it is not supposed to be called, ever."
403 (error "terminal-init-internal called for window-system `%s'"
406 (defun msdos-initialize-window-system ()
407 "Initialization function for the `pc' \"window system\"."
408 (or (eq (window-system) 'pc
)
410 "`msdos-initialize-window-system' called, but window-system is `%s'"
412 ;; First, the keyboard.
413 (msdos-setup-keyboard terminal-frame
) ; see internal.el
414 ;; Next, register the default colors.
415 (let* ((colors msdos-color-values
)
416 (color (car colors
)))
419 (tty-color-define (car color
) (cadr color
) (cddr color
))
420 (setq colors
(cdr colors
) color
(car colors
))))
421 ;; Modifying color mappings means realized faces don't
422 ;; use the right colors, so clear them.
424 ;; Now set up some additional faces.
426 ;; Set up the initial frame.
427 (msdos-setup-initial-frame)
428 ;; Help echo is displayed in the echo area.
429 (setq show-help-function
'msdos-show-help
)
430 ;; We want to delay the codepage-related setup until after user's
431 ;; .emacs is processed, because people might define their
432 ;; `dos-codepage-setup-hook' there.
433 (add-hook 'after-init-hook
'dos-codepage-setup
)
434 ;; In multibyte mode, we want unibyte buffers to be displayed
435 ;; using the terminal coding system, so that they display
436 ;; correctly on the DOS terminal; in unibyte mode we want to see
437 ;; all 8-bit characters verbatim. In both cases, we want the
438 ;; entire range of 8-bit characters to arrive at our display code
440 (standard-display-8bit 127 255)
441 ;; We are fast enough to make this optimization unnecessary.
442 (setq split-window-keep-point t
)
443 ;; Arrange for the kill and yank functions to set and check the
445 (setq interprogram-cut-function
'x-select-text
)
446 (setq interprogram-paste-function
'x-get-selection-value
)
447 (menu-bar-enable-clipboard)
448 (run-hooks 'terminal-init-msdos-hook
))
450 ;; frame-creation-function-alist is examined by frame.el:make-frame.
451 (add-to-list 'frame-creation-function-alist
452 '(pc . msdos-create-frame-with-faces
))
453 ;; window-system-initialization-alist is examined by startup.el:command-line.
454 (add-to-list 'window-system-initialization-alist
455 '(pc . msdos-initialize-window-system
))
456 ;; We don't need anything beyond tty-handle-args for handling
457 ;; command-line argument; see startup.el.
458 (add-to-list 'handle-args-function-alist
'(pc . tty-handle-args
))
460 ;; ---------------------------------------------------------------------------
464 ;;; pc-win.el ends here