1 ;;; pc-win.el --- setup support for `PC windows' (whatever that is)
3 ;; Copyright (C) 1994, 1996-1997, 1999, 2001-2011
4 ;; Free Software Foundation, Inc.
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 (load "term/internal" nil t
)
45 (declare-function msdos-remember-default-colors
"msdos.c")
46 (declare-function w16-set-clipboard-data
"w16select.c")
47 (declare-function w16-get-clipboard-data
"w16select.c")
48 (declare-function msdos-setup-keyboard
"internal" (frame))
50 ;;; This was copied from etc/rgb.txt, except that some values were changed
51 ;;; a bit to make them consistent with DOS console colors, and the RGB
52 ;;; values were scaled up to 16 bits, as `tty-define-color' requires.
54 ;;; The mapping between the 16 standard EGA/VGA colors and X color names
55 ;;; was done by running a Unix version of Emacs inside an X client and a
56 ;;; DJGPP-compiled Emacs on the same PC. The names of X colors used to
57 ;;; define the pixel values are shown as comments to each color below.
59 ;;; If you want to change the RGB values, keep in mind that various pieces
60 ;;; of Emacs think that a color whose RGB values add up to less than 0.6 of
61 ;;; the values for WHITE (i.e. less than 117963) are ``dark'', otherwise the
62 ;;; color is ``light''; see `frame-set-background-mode' in lisp/faces.el for
64 (defvar msdos-color-values
66 ("blue" 1 0 0 52480) ; MediumBlue
67 ("green" 2 8704 35584 8704) ; ForestGreen
68 ("cyan" 3 0 52736 53504) ; DarkTurquoise
69 ("red" 4 45568 8704 8704) ; FireBrick
70 ("magenta" 5 35584 0 35584) ; DarkMagenta
71 ("brown" 6 40960 20992 11520) ; Sienna
72 ("lightgray" 7 48640 48640 48640) ; Gray
73 ("darkgray" 8 26112 26112 26112) ; Gray40
74 ("lightblue" 9 0 0 65535) ; Blue
75 ("lightgreen" 10 0 65535 0) ; Green
76 ("lightcyan" 11 0 65535 65535) ; Cyan
77 ("lightred" 12 65535 0 0) ; Red
78 ("lightmagenta" 13 65535 0 65535) ; Magenta
79 ("yellow" 14 65535 65535 0) ; Yellow
80 ("white" 15 65535 65535 65535))
81 "A list of MS-DOS console colors, their indices and 16-bit RGB values.")
83 ;; ---------------------------------------------------------------------------
84 ;; We want to delay setting frame parameters until the faces are setup
85 (defvar default-frame-alist nil
)
86 ;(modify-frame-parameters terminal-frame default-frame-alist)
88 (defun msdos-face-setup ()
89 "Initial setup of faces for the MS-DOS display."
90 (set-face-foreground 'bold
"yellow")
91 (set-face-foreground 'italic
"red")
92 (set-face-foreground 'bold-italic
"lightred")
93 (set-face-foreground 'underline
"white")
95 (make-face 'msdos-menu-active-face
)
96 (make-face 'msdos-menu-passive-face
)
97 (make-face 'msdos-menu-select-face
)
98 (set-face-foreground 'msdos-menu-active-face
"white")
99 (set-face-foreground 'msdos-menu-passive-face
"lightgray")
100 (set-face-background 'msdos-menu-active-face
"blue")
101 (set-face-background 'msdos-menu-passive-face
"blue")
102 (set-face-background 'msdos-menu-select-face
"red"))
104 (defun msdos-handle-reverse-video (frame parameters
)
105 "Handle the reverse-video frame parameter on MS-DOS frames."
106 (when (cdr (or (assq 'reverse parameters
)
107 (assq 'reverse default-frame-alist
)))
108 (let* ((params (frame-parameters frame
))
109 (fg (cdr (assq 'foreground-color params
)))
110 (bg (cdr (assq 'background-color params
))))
111 (if (equal fg
(cdr (assq 'mouse-color params
)))
112 (modify-frame-parameters frame
113 (list (cons 'mouse-color bg
))))
114 (if (equal fg
(cdr (assq 'cursor-color params
)))
115 (modify-frame-parameters frame
116 (list (cons 'cursor-color bg
)))))))
118 ;; This must run after all the default colors are inserted into
119 ;; tty-color-alist, since msdos-handle-reverse-video needs to know the
120 ;; actual frame colors.
121 (defun msdos-setup-initial-frame ()
122 (modify-frame-parameters terminal-frame default-frame-alist
)
123 ;; This remembers the screen colors after applying default-frame-alist,
124 ;; so that all subsequent frames could begin with those colors.
125 (msdos-remember-default-colors terminal-frame
)
126 (modify-frame-parameters terminal-frame initial-frame-alist
)
127 (msdos-handle-reverse-video terminal-frame
128 (frame-parameters terminal-frame
))
130 (frame-set-background-mode terminal-frame
)
131 (face-set-after-frame-default terminal-frame
))
133 ;; We create frames as if we were a terminal, but without invoking the
134 ;; terminal-initialization function. Also, our handling of reverse
135 ;; video is slightly different.
136 (defun msdos-create-frame-with-faces (&optional parameters
)
137 "Create an frame on MS-DOS display.
138 Optional frame parameters PARAMETERS specify the frame parameters.
139 Parameters not specified by PARAMETERS are taken from
140 `default-frame-alist'. If either PARAMETERS or `default-frame-alist'
141 contains a `reverse' parameter, handle that. Value is the new frame
143 (let ((frame (make-terminal-frame parameters
))
146 (with-selected-frame frame
147 (msdos-handle-reverse-video frame
(frame-parameters frame
))
148 (unless (terminal-parameter frame
'terminal-initted
)
149 (set-terminal-parameter frame
'terminal-initted t
))
150 (frame-set-background-mode frame
)
151 (face-set-after-frame-default frame
)
153 (unless success
(delete-frame frame
)))
156 ;; ---------------------------------------------------------------------------
157 ;; More or less useful imitations of certain X-functions. A lot of the
158 ;; values returned are questionable, but usually only the form of the
159 ;; returned value matters. Also, by the way, recall that `ignore' is
160 ;; a useful function for returning 'nil regardless of argument.
163 (defun x-list-fonts (pattern &optional face frame maximum width
)
164 (if (or (null width
) (and (numberp width
) (= width
1)))
166 (list "no-such-font")))
167 (defun x-display-pixel-width (&optional frame
) (frame-width frame
))
168 (defun x-display-pixel-height (&optional frame
) (frame-height frame
))
169 (defun x-display-planes (&optional frame
) 4) ;bg switched to 16 colors as well
170 (defun x-display-color-cells (&optional frame
) 16)
171 (defun x-server-max-request-size (&optional frame
) 1000000) ; ???
172 (defun x-server-vendor (&optional frame
) t
"GNU")
173 (defun x-server-version (&optional frame
) '(1 0 0))
174 (defun x-display-screens (&optional frame
) 1)
175 (defun x-display-mm-height (&optional frame
) 245) ; Guess the size of my
176 (defun x-display-mm-width (&optional frame
) 322) ; monitor, EZ...
177 (defun x-display-backing-store (&optional frame
) 'not-useful
)
178 (defun x-display-visual-class (&optional frame
) 'static-color
)
179 (fset 'x-display-save-under
'ignore
)
180 (fset 'x-get-resource
'ignore
)
182 ;; From lisp/term/x-win.el
183 (defvar x-display-name
"pc"
184 "The name of the window display on which Emacs was started.
185 On X, the display name of individual X frames is recorded in the
186 `display' frame parameter.")
187 (defvar x-colors
(mapcar 'car msdos-color-values
)
188 "List of basic colors available on color displays.
189 For X, the list comes from the `rgb.txt' file,v 10.41 94/02/20.
190 For Nextstep, this is a list of non-PANTONE colors returned by
191 the operating system.")
193 ;; From lisp/term/w32-win.el
197 ;;; We keep track of the last text selected here, so we can check the
198 ;;; current selection against it, and avoid passing back our own text
199 ;;; from x-selection-value.
200 (defvar x-last-selected-text nil
)
202 (defcustom x-select-enable-clipboard t
203 "Non-nil means cutting and pasting uses the clipboard.
204 This is in addition to, but in preference to, the primary selection.
206 Note that MS-Windows does not support selection types other than the
207 clipboard. (The primary selection that is set by Emacs is not
208 accessible to other programs on MS-Windows.)
210 This variable is not used by the Nextstep port."
214 (defun x-select-text (text)
215 "Select TEXT, a string, according to the window system.
217 On X, if `x-select-enable-clipboard' is non-nil, copy TEXT to the
218 clipboard. If `x-select-enable-primary' is non-nil, put TEXT in
219 the primary selection.
221 On Windows, make TEXT the current selection. If
222 `x-select-enable-clipboard' is non-nil, copy the text to the
225 On Nextstep, put TEXT in the pasteboard."
226 (if x-select-enable-clipboard
227 (w16-set-clipboard-data text
))
228 (setq x-last-selected-text text
))
230 ;;; Return the value of the current selection.
231 ;;; Consult the selection. Treat empty strings as if they were unset.
232 (defun x-get-selection-value ()
233 (if x-select-enable-clipboard
235 ;; Don't die if x-get-selection signals an error.
237 (setq text
(w16-get-clipboard-data))
238 (error (message "w16-get-clipboard-data:%s" c
)))
239 (if (string= text
"") (setq text nil
))
242 ((eq text x-last-selected-text
) nil
)
243 ((string= text x-last-selected-text
)
244 ;; Record the newer string, so subsequent calls can use the 'eq' test.
245 (setq x-last-selected-text text
)
248 (setq x-last-selected-text text
))))))
250 ;; x-selection-owner-p is used in simple.el.
251 (defun x-selection-owner-p (&optional type
)
252 "Whether the current Emacs process owns the given X Selection.
253 The arg should be the name of the selection in question, typically one of
254 the symbols `PRIMARY', `SECONDARY', or `CLIPBOARD'.
255 \(Those are literal upper-case symbol names, since that's what X expects.)
256 For convenience, the symbol nil is the same as `PRIMARY',
257 and t is the same as `SECONDARY'."
258 (if x-select-enable-clipboard
260 ;; Don't die if w16-get-clipboard-data signals an error.
262 (setq text
(w16-get-clipboard-data)))
263 ;; We consider ourselves the owner of the selection if it does
264 ;; not exist, or exists and compares equal with the last text
265 ;; we've put into the Windows clipboard.
268 ((or (eq text x-last-selected-text
)
269 (string= text x-last-selected-text
))
273 ;; x-own-selection-internal and x-disown-selection-internal are used
274 ;; in select.el:x-set-selection.
275 (defun x-own-selection-internal (type value
)
276 "Assert an X selection of the given TYPE with the given VALUE.
277 TYPE is a symbol, typically `PRIMARY', `SECONDARY', or `CLIPBOARD'.
278 \(Those are literal upper-case symbol names, since that's what X expects.)
279 VALUE is typically a string, or a cons of two markers, but may be
280 anything that the functions on `selection-converter-alist' know about."
282 (x-select-text value
))
285 (defun x-disown-selection-internal (selection &optional time
)
286 "If we own the selection SELECTION, disown it.
287 Disowning it means there is no such selection."
288 (if (x-selection-owner-p selection
)
291 ;; x-get-selection-internal is used in select.el
292 (defun x-get-selection-internal (selection type
&optional time_stamp
)
293 "Return text selected from some X window.
294 SELECTION is a symbol, typically `PRIMARY', `SECONDARY', or `CLIPBOARD'.
295 \(Those are literal upper-case symbol names, since that's what X expects.)
296 TYPE is the type of data desired, typically `STRING'.
297 TIME_STAMP is the time to use in the XConvertSelection call for foreign
298 selections. If omitted, defaults to the time for the last event."
299 (x-get-selection-value))
301 ;; From src/fontset.c:
302 (fset 'query-fontset
'ignore
)
304 ;; From lisp/term/x-win.el: make iconify-or-deiconify-frame a no-op.
305 (fset 'iconify-or-deiconify-frame
'ignore
)
307 ;; From lisp/frame.el
308 (fset 'set-default-font
'ignore
)
309 (fset 'set-mouse-color
'ignore
) ; We cannot, I think.
310 (fset 'set-cursor-color
'ignore
) ; Hardware determined by char under.
311 (fset 'set-border-color
'ignore
) ; Not useful.
313 (defvar msdos-last-help-message nil
314 "The last help message received via `show-help-function'.
315 This is used by `msdos-show-help'.")
317 (defvar msdos-previous-message nil
318 "The content of the echo area before help echo was displayed.")
320 (defun msdos-show-help (help)
321 "Function installed as `show-help-function' on MS-DOS frames."
322 (when (and (not (window-minibuffer-p)) ;Don't overwrite minibuffer contents.
323 (not cursor-in-echo-area
)) ;Don't overwrite a prompt.
326 (setq help
(replace-regexp-in-string "\n" ", " help
))
327 (unless (or msdos-previous-message
328 (string-equal help
(current-message))
329 (and (stringp msdos-last-help-message
)
330 (string-equal msdos-last-help-message
332 (setq msdos-previous-message
(current-message)))
333 (setq msdos-last-help-message help
)
334 (let ((message-truncate-lines nil
)
335 (message-log-max nil
))
336 (message "%s" help
)))
337 ((stringp msdos-previous-message
)
338 (let ((message-log-max nil
))
339 (message "%s" msdos-previous-message
)
340 (setq msdos-previous-message nil
)))
346 ;; ---------------------------------------------------------------------------
347 ;; This function is run, by faces.el:tty-create-frame-with-faces, only
348 ;; for the initial frame (on each terminal, but we have only one).
349 ;; This works by setting the `terminal-initted' terminal parameter to
350 ;; this function, the first time `tty-create-frame-with-faces' is
351 ;; called on that terminal. `tty-create-frame-with-faces' is called
352 ;; directly from startup.el and also by `make-frame' through
353 ;; `frame-creation-function-alist'. `make-frame' will call this
354 ;; function if `msdos-create-frame-with-faces' (see below) is not
355 ;; found in `frame-creation-function-alist', which means something is
356 ;; _very_ wrong, because "internal" terminal emulator should not be
357 ;; turned on if our window-system is not `pc'. Therefore, the only
358 ;; Right Thing for us to do here is scream bloody murder.
359 (defun terminal-init-internal ()
360 "Terminal initialization function for the MS-DOS \"internal\" terminal.
361 Errors out because it is not supposed to be called, ever."
362 (error "terminal-init-internal called for window-system `%s'"
365 (defun msdos-initialize-window-system ()
366 "Initialization function for the `pc' \"window system\"."
367 (or (eq (window-system) 'pc
)
369 "`msdos-initialize-window-system' called, but window-system is `%s'"
371 ;; First, the keyboard.
372 (msdos-setup-keyboard terminal-frame
) ; see internal.el
373 ;; Next, register the default colors.
374 (let* ((colors msdos-color-values
)
375 (color (car colors
)))
378 (tty-color-define (car color
) (cadr color
) (cddr color
))
379 (setq colors
(cdr colors
) color
(car colors
))))
380 ;; Modifying color mappings means realized faces don't
381 ;; use the right colors, so clear them.
383 ;; Now set up some additional faces.
385 ;; Set up the initial frame.
386 (msdos-setup-initial-frame)
387 ;; Help echo is displayed in the echo area.
388 (setq show-help-function
'msdos-show-help
)
389 ;; We want to delay the codepage-related setup until after user's
390 ;; .emacs is processed, because people might define their
391 ;; `dos-codepage-setup-hook' there.
392 (add-hook 'after-init-hook
'dos-codepage-setup
)
393 ;; In multibyte mode, we want unibyte buffers to be displayed
394 ;; using the terminal coding system, so that they display
395 ;; correctly on the DOS terminal; in unibyte mode we want to see
396 ;; all 8-bit characters verbatim. In both cases, we want the
397 ;; entire range of 8-bit characters to arrive at our display code
399 (standard-display-8bit 127 255)
400 ;; We are fast enough to make this optimization unnecessary.
401 (setq split-window-keep-point t
)
402 ;; Arrange for the kill and yank functions to set and check the
404 (setq interprogram-cut-function
'x-select-text
)
405 (setq interprogram-paste-function
'x-get-selection-value
)
406 (menu-bar-enable-clipboard)
407 (run-hooks 'terminal-init-msdos-hook
))
409 ;; frame-creation-function-alist is examined by frame.el:make-frame.
410 (add-to-list 'frame-creation-function-alist
411 '(pc . msdos-create-frame-with-faces
))
412 ;; window-system-initialization-alist is examined by startup.el:command-line.
413 (add-to-list 'window-system-initialization-alist
414 '(pc . msdos-initialize-window-system
))
415 ;; We don't need anything beyond tty-handle-args for handling
416 ;; command-line argument; see startup.el.
417 (add-to-list 'handle-args-function-alist
'(pc . tty-handle-args
))
419 ;; ---------------------------------------------------------------------------
423 ;;; pc-win.el ends here