440
+ − 1 /* GPM (General purpose mouse) functions
428
+ − 2 Copyright (C) 1997 William M. Perry <wmperry@gnu.org>
+ − 3 Copyright (C) 1999 Free Software Foundation, Inc.
793
+ − 4 Copyright (C) 2002 Ben Wing.
+ − 5
+ − 6 This file is part of XEmacs.
+ − 7
+ − 8 XEmacs is free software; you can redistribute it and/or modify it
+ − 9 under the terms of the GNU General Public License as published by the
+ − 10 Free Software Foundation; either version 2, or (at your option) any
+ − 11 later version.
+ − 12
+ − 13 XEmacs is distributed in the hope that it will be useful, but WITHOUT
+ − 14 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ − 15 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
+ − 16 for more details.
+ − 17
+ − 18 You should have received a copy of the GNU General Public License
+ − 19 along with XEmacs; see the file COPYING. If not, write to
+ − 20 the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+ − 21 Boston, MA 02111-1307, USA. */
428
+ − 22
+ − 23 /* Synched up with: Not in FSF. */
+ − 24
+ − 25 /* Authors: William Perry */
+ − 26
+ − 27 #include <config.h>
+ − 28 #include "lisp.h"
793
+ − 29
+ − 30 #include "commands.h"
+ − 31 #include "console-tty.h"
428
+ − 32 #include "console.h"
+ − 33 #include "device.h"
+ − 34 #include "events.h"
793
+ − 35 #include "lstream.h"
+ − 36 #include "process.h"
428
+ − 37 #include "sysdep.h"
876
+ − 38 #include "frame.h"
+ − 39 #include "device-impl.h"
+ − 40 #include "console-impl.h"
+ − 41 #include "console-tty-impl.h"
793
+ − 42
428
+ − 43 #include "sysproc.h" /* for MAXDESC */
+ − 44
+ − 45 #ifdef HAVE_GPM
+ − 46 #include "gpmevent.h"
+ − 47 #include <gpm.h>
+ − 48
+ − 49 #define KG_SHIFT 0
+ − 50 #define KG_CTRL 2
+ − 51 #define KG_ALT 3
+ − 52
+ − 53 extern int gpm_tried;
+ − 54 extern void *gpm_stack;
+ − 55
+ − 56 static int (*orig_event_pending_p) (int);
440
+ − 57 static void (*orig_next_event_cb) (Lisp_Event *);
428
+ − 58
+ − 59 static Lisp_Object gpm_event_queue;
+ − 60 static Lisp_Object gpm_event_queue_tail;
+ − 61
793
+ − 62 struct __gpm_state
+ − 63 {
+ − 64 int gpm_tried;
+ − 65 int gpm_flag;
+ − 66 void *gpm_stack;
428
+ − 67 };
+ − 68
+ − 69 static struct __gpm_state gpm_state_information[MAXDESC];
+ − 70
+ − 71 static void
+ − 72 store_gpm_state (int fd)
+ − 73 {
793
+ − 74 gpm_state_information[fd].gpm_tried = gpm_tried;
+ − 75 gpm_state_information[fd].gpm_flag = gpm_flag;
+ − 76 gpm_state_information[fd].gpm_stack = gpm_stack;
428
+ − 77 }
+ − 78
+ − 79 static void
+ − 80 restore_gpm_state (int fd)
+ − 81 {
793
+ − 82 gpm_tried = gpm_state_information[fd].gpm_tried;
+ − 83 gpm_flag = gpm_state_information[fd].gpm_flag;
+ − 84 gpm_stack = gpm_state_information[fd].gpm_stack;
+ − 85 gpm_consolefd = gpm_fd = fd;
428
+ − 86 }
+ − 87
+ − 88 static void
+ − 89 clear_gpm_state (int fd)
+ − 90 {
793
+ − 91 if (fd >= 0)
+ − 92 memset (&gpm_state_information[fd], '\0', sizeof (struct __gpm_state));
+ − 93 gpm_tried = gpm_flag = 1;
+ − 94 gpm_fd = gpm_consolefd = -1;
+ − 95 gpm_stack = NULL;
428
+ − 96 }
+ − 97
+ − 98 static int
440
+ − 99 get_process_infd (Lisp_Process *p)
428
+ − 100 {
853
+ − 101 Lisp_Object instr, outstr, errstr;
+ − 102 get_process_streams (p, &instr, &outstr, &errstr);
428
+ − 103 assert (!NILP (instr));
+ − 104 return filedesc_stream_fd (XLSTREAM (instr));
+ − 105 }
+ − 106
+ − 107 DEFUN ("receive-gpm-event", Freceive_gpm_event, 0, 2, 0, /*
+ − 108 Run GPM_GetEvent().
+ − 109 This function is the process handler for the GPM connection.
+ − 110 */
+ − 111 (process, string))
+ − 112 {
793
+ − 113 Gpm_Event ev;
+ − 114 int modifiers = 0;
+ − 115 int button = 1;
+ − 116 Lisp_Object fake_event = Qnil;
+ − 117 Lisp_Event *event = NULL;
+ − 118 struct gcpro gcpro1;
+ − 119 static int num_events;
428
+ − 120
793
+ − 121 CHECK_PROCESS (process);
428
+ − 122
793
+ − 123 restore_gpm_state (get_process_infd (XPROCESS (process)));
428
+ − 124
793
+ − 125 if (!Gpm_GetEvent (&ev))
+ − 126 {
+ − 127 warn_when_safe (Qnil, Qerror,
+ − 128 "Gpm_GetEvent failed - %d", gpm_fd);
+ − 129 return (Qzero);
+ − 130 }
428
+ − 131
793
+ − 132 GCPRO1 (fake_event);
428
+ − 133
793
+ − 134 num_events++;
+ − 135
+ − 136 fake_event = Fmake_event (Qnil, Qnil);
+ − 137 event = XEVENT (fake_event);
428
+ − 138
793
+ − 139 event->timestamp = 0;
+ − 140 event->channel = Fselected_frame (Qnil); /* CONSOLE_SELECTED_FRAME (con); */
428
+ − 141
793
+ − 142 /* Whow, wouldn't named defines be NICE!?!?! */
+ − 143 modifiers = 0;
428
+ − 144
793
+ − 145 if (ev.modifiers & 1) modifiers |= XEMACS_MOD_SHIFT;
+ − 146 if (ev.modifiers & 2) modifiers |= XEMACS_MOD_META;
+ − 147 if (ev.modifiers & 4) modifiers |= XEMACS_MOD_CONTROL;
+ − 148 if (ev.modifiers & 8) modifiers |= XEMACS_MOD_META;
+ − 149
+ − 150 if (ev.buttons & GPM_B_LEFT)
+ − 151 button = 1;
+ − 152 else if (ev.buttons & GPM_B_MIDDLE)
+ − 153 button = 2;
+ − 154 else if (ev.buttons & GPM_B_RIGHT)
+ − 155 button = 3;
428
+ − 156
793
+ − 157 switch (GPM_BARE_EVENTS (ev.type))
+ − 158 {
+ − 159 case GPM_DOWN:
+ − 160 case GPM_UP:
934
+ − 161 SET_EVENT_TYPE (event,
+ − 162 (ev.type & GPM_DOWN) ? button_press_event : button_release_event);
1204
+ − 163 SET_EVENT_BUTTON_X (event, ev.x);
+ − 164 SET_EVENT_BUTTON_Y (event, ev.y);
+ − 165 SET_EVENT_BUTTON_BUTTON (event, button);
+ − 166 SET_EVENT_BUTTON_MODIFIERS (event, modifiers);
793
+ − 167 break;
+ − 168 case GPM_MOVE:
+ − 169 case GPM_DRAG:
934
+ − 170 SET_EVENT_TYPE (event, pointer_motion_event);
1204
+ − 171 SET_EVENT_MOTION_X (event, ev.x);
+ − 172 SET_EVENT_MOTION_Y (event, ev.y);
+ − 173 SET_EVENT_MOTION_MODIFIERS (event, modifiers);
793
+ − 174 default:
+ − 175 /* This will never happen */
+ − 176 break;
+ − 177 }
428
+ − 178
793
+ − 179 /* Handle the event */
+ − 180 enqueue_event (fake_event, &gpm_event_queue, &gpm_event_queue_tail);
428
+ − 181
793
+ − 182 UNGCPRO;
428
+ − 183
793
+ − 184 return (Qzero);
428
+ − 185 }
+ − 186
+ − 187 static void turn_off_gpm (char *process_name)
+ − 188 {
793
+ − 189 Lisp_Object process = Fget_process (build_string (process_name));
+ − 190 int fd = -1;
428
+ − 191
793
+ − 192 if (NILP (process))
+ − 193 /* Something happened to our GPM process - fail silently */
+ − 194 return;
428
+ − 195
793
+ − 196 fd = get_process_infd (XPROCESS (process));
428
+ − 197
793
+ − 198 restore_gpm_state (fd);
428
+ − 199
793
+ − 200 Gpm_Close();
428
+ − 201
793
+ − 202 clear_gpm_state (fd);
428
+ − 203
793
+ − 204 Fdelete_process (build_string (process_name));
428
+ − 205 }
+ − 206
+ − 207 #ifdef TIOCLINUX
+ − 208 static Lisp_Object
793
+ − 209 tty_get_foreign_selection (Lisp_Object selection_symbol,
+ − 210 Lisp_Object target_type)
428
+ − 211 {
793
+ − 212 /* This function can GC */
+ − 213 struct device *d = decode_device (Qnil);
+ − 214 int fd = DEVICE_INFD (d);
+ − 215 char c = 3;
+ − 216 Lisp_Object output_stream = Qnil;
+ − 217 Lisp_Object terminal_stream = Qnil;
+ − 218 Lisp_Object output_string = Qnil;
+ − 219 struct gcpro gcpro1,gcpro2,gcpro3;
+ − 220
+ − 221 GCPRO3(output_stream,terminal_stream,output_string);
428
+ − 222
793
+ − 223 /* The ioctl() to paste actually puts things in the input queue of
+ − 224 ** the virtual console, so we need to trap that data, since we are
+ − 225 ** supposed to return the actual string selection from this
+ − 226 ** function.
+ − 227 */
428
+ − 228
793
+ − 229 /* I really hate doing this, but it doesn't seem to cause any
+ − 230 ** problems, and it makes the Lstream_read stuff further down
+ − 231 ** error out correctly instead of trying to indefinitely read from
+ − 232 ** the console.
+ − 233 **
+ − 234 ** There is no set_descriptor_blocking() function call, but in my
+ − 235 ** testing under linux, it has not proved fatal to leave the
+ − 236 ** descriptor in non-blocking mode.
+ − 237 **
+ − 238 ** William Perry Nov 5, 1999
+ − 239 */
+ − 240 set_descriptor_non_blocking (fd);
428
+ − 241
793
+ − 242 /* We need two streams, one for reading from the selected device,
+ − 243 ** and one to write the data into. There is no writable version
+ − 244 ** of the lisp-string lstream, so we make do with a resizing
+ − 245 ** buffer stream, and make a string out of it after we are
+ − 246 ** done.
+ − 247 */
+ − 248 output_stream = make_resizing_buffer_output_stream ();
+ − 249 terminal_stream = make_filedesc_input_stream (fd, 0, -1, LSTR_BLOCKED_OK);
+ − 250 output_string = Qnil;
+ − 251
+ − 252 /* #### We should arguably use a specbind() and an unwind routine here,
+ − 253 ** #### but I don't care that much right now.
+ − 254 */
+ − 255 if (NILP (output_stream) || NILP (terminal_stream))
+ − 256 /* Should we signal an error here? */
+ − 257 goto out;
428
+ − 258
793
+ − 259 if (ioctl (fd, TIOCLINUX, &c) < 0)
+ − 260 {
+ − 261 /* Could not get the selection - eek */
+ − 262 UNGCPRO;
+ − 263 return (Qnil);
+ − 264 }
428
+ − 265
793
+ − 266 while (1)
+ − 267 {
867
+ − 268 Ibyte tempbuf[1024]; /* some random amount */
793
+ − 269 Bytecount i;
+ − 270 Bytecount size_in_bytes =
+ − 271 Lstream_read (XLSTREAM (terminal_stream),
+ − 272 tempbuf, sizeof (tempbuf));
+ − 273
+ − 274 if (size_in_bytes <= 0)
+ − 275 /* end of the stream */
+ − 276 break;
+ − 277
+ − 278 /* convert CR->LF */
+ − 279 for (i = 0; i < size_in_bytes; i++)
428
+ − 280 {
793
+ − 281 if (tempbuf[i] == '\r')
+ − 282 tempbuf[i] = '\n';
428
+ − 283 }
+ − 284
793
+ − 285 Lstream_write (XLSTREAM (output_stream), tempbuf, size_in_bytes);
+ − 286 }
428
+ − 287
793
+ − 288 Lstream_flush (XLSTREAM (output_stream));
428
+ − 289
793
+ − 290 output_string =
+ − 291 make_string (resizing_buffer_stream_ptr (XLSTREAM (output_stream)),
+ − 292 Lstream_byte_count (XLSTREAM (output_stream)));
428
+ − 293
793
+ − 294 Lstream_delete (XLSTREAM (output_stream));
+ − 295 Lstream_delete (XLSTREAM (terminal_stream));
428
+ − 296
+ − 297 out:
793
+ − 298 UNGCPRO;
+ − 299 return (output_string);
428
+ − 300 }
+ − 301
+ − 302 static Lisp_Object
442
+ − 303 tty_selection_exists_p (Lisp_Object selection, Lisp_Object selection_type)
428
+ − 304 {
793
+ − 305 return (Qt);
428
+ − 306 }
+ − 307 #endif /* TIOCLINUX */
+ − 308
+ − 309 #if 0
+ − 310 static Lisp_Object
442
+ − 311 tty_own_selection (Lisp_Object selection_name, Lisp_Object selection_value,
+ − 312 Lisp_Object how_to_add, Lisp_Object selection_type)
428
+ − 313 {
793
+ − 314 /* There is no way to do this cleanly - the GPM selection
+ − 315 ** 'protocol' (actually the TIOCLINUX ioctl) requires a start and
+ − 316 ** end position on the _screen_, not a string to stick in there.
+ − 317 ** Lame.
+ − 318 **
+ − 319 ** William Perry Nov 4, 1999
+ − 320 */
428
+ − 321 }
+ − 322 #endif
+ − 323
+ − 324 /* This function appears to work once in a blue moon. I'm not sure
793
+ − 325 ** exactly why either. *sigh*
+ − 326 **
+ − 327 ** William Perry Nov 4, 1999
+ − 328 **
+ − 329 ** Apparently, this is the way (mouse-position) is supposed to work,
+ − 330 ** and I was just expecting something else. (mouse-pixel-position)
+ − 331 ** works just fine.
+ − 332 **
+ − 333 ** William Perry Nov 7, 1999
+ − 334 */
428
+ − 335 static int
+ − 336 tty_get_mouse_position (struct device *d, Lisp_Object *frame, int *x, int *y)
+ − 337 {
793
+ − 338 Gpm_Event ev;
+ − 339 int num_buttons;
428
+ − 340
793
+ − 341 memset(&ev,'\0',sizeof(ev));
428
+ − 342
793
+ − 343 num_buttons = Gpm_GetSnapshot(&ev);
428
+ − 344
793
+ − 345 if (!num_buttons)
+ − 346 /* This means there are events pending... */
428
+ − 347
793
+ − 348 /* #### In theory, we should drain the events pending, stick
+ − 349 ** #### them in the queue, and return the mouse position
+ − 350 ** #### anyway.
+ − 351 */
+ − 352 return (-1);
+ − 353 *x = ev.x;
+ − 354 *y = ev.y;
+ − 355 *frame = DEVICE_SELECTED_FRAME (d);
+ − 356 return (1);
428
+ − 357 }
+ − 358
+ − 359 static void
+ − 360 tty_set_mouse_position (struct window *w, int x, int y)
+ − 361 {
793
+ − 362 /*
+ − 363 #### I couldn't find any GPM functions that set the mouse position.
+ − 364 #### Mr. Perry had left this function empty; that must be why.
+ − 365 #### karlheg
+ − 366 */
428
+ − 367 }
+ − 368
+ − 369 static int gpm_event_pending_p (int user_p)
+ − 370 {
793
+ − 371 Lisp_Object event;
428
+ − 372
793
+ − 373 EVENT_CHAIN_LOOP (event, gpm_event_queue)
+ − 374 {
+ − 375 if (!user_p || command_event_p (event))
+ − 376 return (1);
+ − 377 }
+ − 378 return (orig_event_pending_p (user_p));
428
+ − 379 }
+ − 380
440
+ − 381 static void gpm_next_event_cb (Lisp_Event *event)
428
+ − 382 {
793
+ − 383 /* #### It would be nice to preserve some sort of ordering of the
+ − 384 ** #### different types of events, but that would be quite a bit
+ − 385 ** #### of work, and would more than likely break the abstraction
+ − 386 ** #### between the other event loops and this one.
+ − 387 */
440
+ − 388
793
+ − 389 if (!NILP (gpm_event_queue))
+ − 390 {
+ − 391 Lisp_Object queued_event =
+ − 392 dequeue_event (&gpm_event_queue, &gpm_event_queue_tail);
+ − 393 *event = *(XEVENT (queued_event));
+ − 394
+ − 395 if (event->event_type == pointer_motion_event)
428
+ − 396 {
793
+ − 397 struct device *d = decode_device (event->channel);
+ − 398 int fd = DEVICE_INFD (d);
428
+ − 399
793
+ − 400 /* Ok, now this is just freaky. Bear with me though.
+ − 401 **
+ − 402 ** If you run gnuclient and attach to a XEmacs running in
+ − 403 ** X or on another TTY, the mouse cursor does not get
+ − 404 ** drawn correctly. This is because the ioctl() fails
+ − 405 ** with EPERM because the TTY specified is not our
+ − 406 ** controlling terminal. If you are the superuser, it
+ − 407 ** will work just spiffy. The appropriate source file (at
+ − 408 ** least in linux 2.2.x) is
+ − 409 ** .../linux/drivers/char/console.c in the function
+ − 410 ** tioclinux(). The following bit of code is brutal to
+ − 411 ** us:
+ − 412 **
+ − 413 ** if (current->tty != tty && !suser())
+ − 414 ** return -EPERM;
+ − 415 **
+ − 416 ** I even tried setting us as a process leader, removing
+ − 417 ** our controlling terminal, and then using the TIOCSCTTY
+ − 418 ** to set up a new controlling terminal, all with no luck.
+ − 419 **
+ − 420 ** What is even weirder is if you run XEmacs in a VC, and
+ − 421 ** attach to it from another VC with gnuclient, go back to
+ − 422 ** the original VC and hit a key, the mouse pointer
+ − 423 ** displays (in BOTH VCs), until you hit a key in the
+ − 424 ** second VC, after which it does not display in EITHER
+ − 425 ** VC. Bizarre, no?
+ − 426 **
+ − 427 ** All I can say is thank god Linux comes with source code
+ − 428 ** or I would have been completely confused. Well, ok,
+ − 429 ** I'm still completely confused. I don't see why they
+ − 430 ** don't just check the permissions on the device
+ − 431 ** (actually, if you have enough access to it to get the
+ − 432 ** console's file descriptor, you should be able to do
+ − 433 ** with it as you wish, but maybe that is just me).
+ − 434 **
+ − 435 ** William M. Perry - Nov 9, 1999
+ − 436 */
428
+ − 437
1204
+ − 438 Gpm_DrawPointer (EVENT_MOTION_X (event),EVENT_MOTION_Y (event), fd);
428
+ − 439 }
+ − 440
793
+ − 441 return;
+ − 442 }
+ − 443
+ − 444 orig_next_event_cb (event);
428
+ − 445 }
+ − 446
+ − 447 static void hook_event_callbacks_once (void)
+ − 448 {
793
+ − 449 static int hooker;
428
+ − 450
793
+ − 451 if (!hooker)
+ − 452 {
+ − 453 orig_event_pending_p = event_stream->event_pending_p;
+ − 454 orig_next_event_cb = event_stream->next_event_cb;
+ − 455 event_stream->event_pending_p = gpm_event_pending_p;
+ − 456 event_stream->next_event_cb = gpm_next_event_cb;
+ − 457 hooker = 1;
+ − 458 }
428
+ − 459 }
+ − 460
+ − 461 static void hook_console_methods_once (void)
+ − 462 {
793
+ − 463 static int hooker;
428
+ − 464
793
+ − 465 if (!hooker)
+ − 466 {
+ − 467 /* Install the mouse position methods for the TTY console type */
+ − 468 CONSOLE_HAS_METHOD (tty, get_mouse_position);
+ − 469 CONSOLE_HAS_METHOD (tty, set_mouse_position);
+ − 470 CONSOLE_HAS_METHOD (tty, get_foreign_selection);
+ − 471 CONSOLE_HAS_METHOD (tty, selection_exists_p);
428
+ − 472 #if 0
793
+ − 473 CONSOLE_HAS_METHOD (tty, own_selection);
428
+ − 474 #endif
793
+ − 475 }
428
+ − 476 }
+ − 477
+ − 478 DEFUN ("gpm-enabled-p", Fgpm_enabled_p, 0, 1, 0, /*
+ − 479 Return non-nil if GPM mouse support is currently enabled on DEVICE.
+ − 480 */
793
+ − 481 (device))
428
+ − 482 {
793
+ − 483 char *console_name = ttyname (DEVICE_INFD (decode_device (device)));
+ − 484 char process_name[1024];
+ − 485 Lisp_Object proc;
428
+ − 486
793
+ − 487 if (!console_name)
+ − 488 return (Qnil);
428
+ − 489
793
+ − 490 memset (process_name, '\0', sizeof(process_name));
+ − 491 snprintf (process_name, sizeof(process_name) - 1, "gpm for %s",
+ − 492 console_name);
428
+ − 493
793
+ − 494 proc = Fget_process (build_string (process_name));
428
+ − 495
793
+ − 496 if (NILP (proc))
+ − 497 return (Qnil);
428
+ − 498
793
+ − 499 if (1) /* (PROCESS_LIVE_P (proc)) */
+ − 500 return (Qt);
+ − 501 return (Qnil);
428
+ − 502 }
+ − 503
+ − 504 DEFUN ("gpm-enable", Fgpm_enable, 0, 2, 0, /*
+ − 505 Toggle accepting of GPM mouse events.
+ − 506 */
793
+ − 507 (device, arg))
428
+ − 508 {
793
+ − 509 Gpm_Connect conn;
+ − 510 int rval;
+ − 511 Lisp_Object gpm_process;
+ − 512 Lisp_Object gpm_filter;
+ − 513 struct device *d = decode_device (device);
+ − 514 int fd = DEVICE_INFD (d);
+ − 515 char *console_name = ttyname (fd);
+ − 516 char process_name[1024];
428
+ − 517
793
+ − 518 hook_event_callbacks_once ();
+ − 519 hook_console_methods_once ();
+ − 520
+ − 521 if (noninteractive)
+ − 522 invalid_operation ("Can't connect to GPM in batch mode", Qunbound);
428
+ − 523
793
+ − 524 if (!console_name)
+ − 525 /* Something seriously wrong here... */
+ − 526 return (Qnil);
+ − 527
+ − 528 memset (process_name, '\0', sizeof(process_name));
+ − 529 snprintf (process_name, sizeof(process_name) - 1, "gpm for %s",
+ − 530 console_name);
428
+ − 531
793
+ − 532 if (NILP (arg))
+ − 533 {
+ − 534 turn_off_gpm (process_name);
+ − 535 return (Qnil);
+ − 536 }
428
+ − 537
793
+ − 538 /* DANGER DANGER.
+ − 539 ** Though shalt not call (gpm-enable t) after we have already
+ − 540 ** started, or stuff blows up.
+ − 541 */
+ − 542 if (!NILP (Fgpm_enabled_p (device)))
+ − 543 invalid_operation ("GPM already enabled for this console", Qunbound);
428
+ − 544
793
+ − 545 conn.eventMask = GPM_DOWN|GPM_UP|GPM_MOVE|GPM_DRAG;
+ − 546 conn.defaultMask = GPM_MOVE;
+ − 547 conn.minMod = 0;
+ − 548 conn.maxMod = ((1 << KG_SHIFT) | (1 << KG_ALT) | (1 << KG_CTRL));
428
+ − 549
793
+ − 550 /* Reset some silly static variables so that multiple Gpm_Open()
+ − 551 ** calls have even a slight chance of working
+ − 552 */
+ − 553 gpm_tried = 0;
+ − 554 gpm_flag = 0;
+ − 555 gpm_stack = NULL;
428
+ − 556
793
+ − 557 /* Make sure Gpm_Open() does ioctl() on the correct
+ − 558 ** descriptor, or it can get the wrong terminal sizes, etc.
+ − 559 */
+ − 560 gpm_consolefd = fd;
440
+ − 561
793
+ − 562 /* We have to pass the virtual console manually, otherwise if you
+ − 563 ** use 'gnuclient -nw' to connect to an XEmacs that is running in
+ − 564 ** X, Gpm_Open() tries to use ttyname(0 | 1 | 2) to find out which
+ − 565 ** console you are using, which is of course not correct for the
+ − 566 ** new tty device.
+ − 567 */
+ − 568 if (strncmp (console_name, "/dev/tty", 8) || !isdigit (console_name[8]))
+ − 569 /* Urk, something really wrong */
+ − 570 return (Qnil);
428
+ − 571
793
+ − 572 rval = Gpm_Open (&conn, atoi (console_name + 8));
428
+ − 573
793
+ − 574 switch (rval)
+ − 575 {
+ − 576 case -1: /* General failure */
+ − 577 break;
+ − 578 case -2: /* We are running under an XTerm */
+ − 579 Gpm_Close();
+ − 580 break;
+ − 581 default:
+ − 582 /* Is this really necessary? */
+ − 583 set_descriptor_non_blocking (gpm_fd);
+ − 584 store_gpm_state (gpm_fd);
+ − 585 gpm_process =
+ − 586 connect_to_file_descriptor (build_string (process_name), Qnil,
+ − 587 make_int (gpm_fd),
+ − 588 make_int (gpm_fd));
428
+ − 589
793
+ − 590 if (!NILP (gpm_process))
+ − 591 {
+ − 592 rval = 0;
+ − 593 Fprocess_kill_without_query (gpm_process, Qnil);
+ − 594 gpm_filter = wrap_subr (&SFreceive_gpm_event);
853
+ − 595 set_process_filter (gpm_process, gpm_filter, 1, 0);
428
+ − 596
793
+ − 597 /* Keep track of the device for later */
+ − 598 /* Fput (gpm_process, intern ("gpm-device"), device); */
428
+ − 599 }
793
+ − 600 else
+ − 601 {
+ − 602 Gpm_Close ();
+ − 603 rval = -1;
+ − 604 }
+ − 605 }
428
+ − 606
793
+ − 607 return (rval ? Qnil : Qt);
428
+ − 608 }
+ − 609
+ − 610 void vars_of_gpmevent (void)
+ − 611 {
793
+ − 612 gpm_event_queue = Qnil;
+ − 613 gpm_event_queue_tail = Qnil;
+ − 614 staticpro (&gpm_event_queue);
+ − 615 staticpro (&gpm_event_queue_tail);
1204
+ − 616 dump_add_root_lisp_object (&gpm_event_queue);
+ − 617 dump_add_root_lisp_object (&gpm_event_queue_tail);
428
+ − 618 }
+ − 619
+ − 620 void syms_of_gpmevent (void)
+ − 621 {
793
+ − 622 DEFSUBR (Freceive_gpm_event);
+ − 623 DEFSUBR (Fgpm_enable);
+ − 624 DEFSUBR (Fgpm_enabled_p);
428
+ − 625 }
+ − 626
+ − 627 #endif /* HAVE_GPM */
