| 1 | ;;; pc-win.el --- setup support for `PC windows' (whatever that is) |
| 2 | |
| 3 | ;; Copyright (C) 1994, 1996-1997, 1999, 2001-2012 |
| 4 | ;; Free Software Foundation, Inc. |
| 5 | |
| 6 | ;; Author: Morten Welinder <terra@diku.dk> |
| 7 | ;; Maintainer: FSF |
| 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 <http://www.gnu.org/licenses/>. |
| 23 | |
| 24 | ;;; Commentary: |
| 25 | |
| 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. |
| 31 | |
| 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. |
| 36 | |
| 37 | ;;; Code: |
| 38 | |
| 39 | (if (not (fboundp 'msdos-remember-default-colors)) |
| 40 | (error "%s: Loading pc-win.el but not compiled for MS-DOS" |
| 41 | (invocation-name))) |
| 42 | |
| 43 | (load "term/internal" nil t) |
| 44 | |
| 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)) |
| 49 | |
| 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. |
| 53 | ;;; |
| 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. |
| 58 | ;;; |
| 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 |
| 63 | ;;; an example. |
| 64 | (defvar msdos-color-values |
| 65 | '(("black" 0 0 0 0) |
| 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.") |
| 82 | |
| 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) |
| 87 | |
| 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") |
| 94 | |
| 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")) |
| 103 | |
| 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))))))) |
| 117 | |
| 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)) |
| 129 | |
| 130 | (frame-set-background-mode terminal-frame) |
| 131 | (face-set-after-frame-default terminal-frame)) |
| 132 | |
| 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 a 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 |
| 142 | created." |
| 143 | (let ((frame (make-terminal-frame parameters)) |
| 144 | success) |
| 145 | (unwind-protect |
| 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) |
| 152 | (setq success t)) |
| 153 | (unless success (delete-frame frame))) |
| 154 | frame)) |
| 155 | |
| 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. |
| 161 | |
| 162 | ;; From src/xfns.c |
| 163 | (defun x-list-fonts (pattern &optional face frame maximum width) |
| 164 | (if (or (null width) (and (numberp width) (= width 1))) |
| 165 | (list "ms-dos") |
| 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) |
| 181 | |
| 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.") |
| 192 | |
| 193 | ;; From lisp/term/w32-win.el |
| 194 | ; |
| 195 | ;;;; Selections |
| 196 | ; |
| 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) |
| 201 | |
| 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. |
| 205 | |
| 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.) |
| 209 | |
| 210 | This variable is not used by the Nextstep port." |
| 211 | :type 'boolean |
| 212 | :group 'killing) |
| 213 | |
| 214 | (defun x-select-text (text) |
| 215 | "Select TEXT, a string, according to the window system. |
| 216 | |
| 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. |
| 220 | |
| 221 | On Windows, make TEXT the current selection. If |
| 222 | `x-select-enable-clipboard' is non-nil, copy the text to the |
| 223 | clipboard as well. |
| 224 | |
| 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)) |
| 229 | |
| 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 |
| 234 | (let (text) |
| 235 | ;; Don't die if x-get-selection signals an error. |
| 236 | (condition-case c |
| 237 | (setq text (w16-get-clipboard-data)) |
| 238 | (error (message "w16-get-clipboard-data:%s" c))) |
| 239 | (if (string= text "") (setq text nil)) |
| 240 | (cond |
| 241 | ((not 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) |
| 246 | nil) |
| 247 | (t |
| 248 | (setq x-last-selected-text text)))))) |
| 249 | |
| 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 |
| 259 | (let (text) |
| 260 | ;; Don't die if w16-get-clipboard-data signals an error. |
| 261 | (ignore-errors |
| 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. |
| 266 | (cond |
| 267 | ((not text) t) |
| 268 | ((or (eq text x-last-selected-text) |
| 269 | (string= text x-last-selected-text)) |
| 270 | text) |
| 271 | (t nil))))) |
| 272 | |
| 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." |
| 281 | (ignore-errors |
| 282 | (x-select-text value)) |
| 283 | value) |
| 284 | |
| 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) |
| 289 | t)) |
| 290 | |
| 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)) |
| 300 | |
| 301 | ;; From src/fontset.c: |
| 302 | (fset 'query-fontset 'ignore) |
| 303 | |
| 304 | ;; From lisp/term/x-win.el: make iconify-or-deiconify-frame a no-op. |
| 305 | (fset 'iconify-or-deiconify-frame 'ignore) |
| 306 | |
| 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. |
| 312 | |
| 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'.") |
| 316 | |
| 317 | (defvar msdos-previous-message nil |
| 318 | "The content of the echo area before help echo was displayed.") |
| 319 | |
| 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. |
| 324 | (cond |
| 325 | ((stringp help) |
| 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 |
| 331 | (current-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))) |
| 341 | (t |
| 342 | (message nil))))) |
| 343 | |
| 344 | |
| 345 | ;; Initialization. |
| 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'" |
| 363 | (window-system))) |
| 364 | |
| 365 | (defun msdos-initialize-window-system () |
| 366 | "Initialization function for the `pc' \"window system\"." |
| 367 | (or (eq (window-system) 'pc) |
| 368 | (error |
| 369 | "`msdos-initialize-window-system' called, but window-system is `%s'" |
| 370 | (window-system))) |
| 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))) |
| 376 | (tty-color-clear) |
| 377 | (while 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. |
| 382 | (clear-face-cache) |
| 383 | ;; Now set up some additional faces. |
| 384 | (msdos-face-setup) |
| 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 |
| 398 | ;; verbatim. |
| 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 |
| 403 | ;; clipboard. |
| 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)) |
| 408 | |
| 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)) |
| 418 | |
| 419 | ;; --------------------------------------------------------------------------- |
| 420 | |
| 421 | (provide 'pc-win) |
| 422 | |
| 423 | ;;; pc-win.el ends here |