frame.c 27.3 KB
Newer Older
Jim Blandy's avatar
Jim Blandy committed
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319
/* Generic screen functions.
   Copyright (C) 1989 Free Software Foundation.

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 1, 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, 675 Mass Ave, Cambridge, MA 02139, USA.  */

#include "config.h"
#include "lisp.h"
#include "screen.h"
#include "window.h"

Lisp_Object Vemacs_iconified;
Lisp_Object Qscreenp;
Lisp_Object Vscreen_list;
Lisp_Object Vterminal_screen;
Lisp_Object Vglobal_minibuffer_screen;

extern Lisp_Object Vminibuffer_list;
extern Lisp_Object get_minibuffer ();

DEFUN ("screenp", Fscreenp, Sscreenp, 1, 1, 0,
  "Return non-nil if OBJECT is a screen.\n\
Value is t for a termcap screen (a character-only terminal),\n\
`x' for an Emacs screen that is really an X window.")
  (screen)
     Lisp_Object screen;
{
  if (XTYPE (screen) != Lisp_Screen)
    return Qnil;
  switch (XSCREEN (screen)->output_method)
    {
    case output_termcap:
      return Qt;
    case output_x_window:
      return intern ("x");
    default:
      abort ();
    }
}

struct screen *
make_screen (mini_p)
     int mini_p;
{
  Lisp_Object screen;
  register struct screen *s;
  register Lisp_Object root_window;
  register Lisp_Object mini_window;

  screen = Fmake_vector (sizeof (struct screen) - sizeof (Lisp_Vector) + 1,
			 make_number (0));
  XSETTYPE (screen, Lisp_Screen);
  s = XSCREEN (screen);

  s->cursor_x = 0;
  s->cursor_y = 0;
  s->current_glyphs = 0;
  s->desired_glyphs = 0;
  s->visible = 0;
  s->display.nothing = 0;
  s->iconified = 0;
  s->wants_modeline = 1;
  s->auto_raise = 0;
  s->auto_lower = 0;
  s->no_split = 0;
  s->garbaged = 0;
  s->has_minibuffer = mini_p;

  s->param_alist = Qnil;

  root_window = make_window (0);
  if (mini_p)
    {
      mini_window = make_window (0);
      XWINDOW (root_window)->next = mini_window;
      XWINDOW (mini_window)->prev = root_window;
      XWINDOW (mini_window)->mini_p = Qt;
      XWINDOW (mini_window)->screen = screen;
      s->minibuffer_window = mini_window;
    }
  else
    {
      mini_window = Qnil;
      XWINDOW (root_window)->next = Qnil;
      s->minibuffer_window = Qnil;
    }

  XWINDOW (root_window)->screen = screen;

  /* 10 is arbitrary,
     just so that there is "something there."
     Correct size will be set up later with change_screen_size.  */

  s->width = 10;
  s->height = 10;

  XFASTINT (XWINDOW (root_window)->width) = 10;
  XFASTINT (XWINDOW (root_window)->height) = (mini_p ? 9 : 10);

  if (mini_p)
    {
      XFASTINT (XWINDOW (mini_window)->width) = 10;
      XFASTINT (XWINDOW (mini_window)->top) = 9;
      XFASTINT (XWINDOW (mini_window)->height) = 1;
    }

  XWINDOW (root_window)->buffer = Qt;
  Fset_window_buffer (root_window, Fcurrent_buffer ());
  if (mini_p)
    {
      XWINDOW (mini_window)->buffer = Qt;
      Fset_window_buffer (mini_window,
			  (NULL (Vminibuffer_list)
			   ? get_minibuffer (0)
			   : Fcar (Vminibuffer_list)));
    }

  s->selected_window = root_window;
  s->root_window = root_window;

  Vscreen_list = Fcons (screen, Vscreen_list);

  return s;
}

/* Make a screen using a separate minibuffer window on another screen.
   MINI_WINDOW is the minibuffer window to use.  nil means use the
   default (the global minibuffer).  */

struct screen *
make_screen_without_minibuffer (mini_window)
     register Lisp_Object mini_window;
{
  register struct screen *s;

  /* Choose the minibuffer window to use.  */
  if (NULL (mini_window))
    {
      CHECK_SCREEN (Vglobal_minibuffer_screen, 0);
      mini_window = XSCREEN (Vglobal_minibuffer_screen)->minibuffer_window;
    }
  else
    {
      CHECK_WINDOW (mini_window, 0);
    }

  /* Make a screen containing just a root window.  */
  s = make_screen (0);

  /* Install the chosen minibuffer window, with proper buffer.  */
  s->minibuffer_window = mini_window;
  Fset_window_buffer (mini_window,
		      (NULL (Vminibuffer_list)
		       ? get_minibuffer (0)
		       : Fcar (Vminibuffer_list)));
  return s;
}

/* Make a screen containing only a minibuffer window.  */

struct screen *
make_minibuffer_screen ()
{
  /* First make a screen containing just a root window, no minibuffer.  */

  register struct screen *s = make_screen (0);
  register Lisp_Object mini_window;
  register Lisp_Object screen;

  XSET (screen, Lisp_Screen, s);

  /* ??? Perhaps leave it to the user program to set auto_raise.  */
  s->auto_raise = 1;
  s->auto_lower = 0;
  s->no_split = 1;
  s->wants_modeline = 0;
  /* Note we leave has_minibuffer as 0.  This is a little strange.  */

  /* Now label the root window as also being the minibuffer.
     Avoid infinite looping on the window chain by marking next pointer
     as nil. */

  mini_window = s->minibuffer_window = s->root_window;
  XWINDOW (mini_window)->mini_p = Qt;
  XWINDOW (mini_window)->next = Qnil;
  XWINDOW (mini_window)->prev = mini_window;
  XWINDOW (mini_window)->screen = screen;

  /* Put the proper buffer in that window.  */

  Fset_window_buffer (mini_window,
		      (NULL (Vminibuffer_list)
		       ? get_minibuffer (0)
		       : Fcar (Vminibuffer_list)));
  return s;
}

/* Construct a screen that refers to the terminal (stdin and stdout).  */

struct screen *
make_terminal_screen ()
{
  register struct screen *s;

  Vscreen_list = Qnil;
  s = make_screen (1);
  s->name = build_string ("terminal");
  s->visible = 1;
  s->display.nothing = 1;   /* Nonzero means screen isn't deleted.  */
  XSET (Vterminal_screen, Lisp_Screen, s);
  return s;
}

DEFUN ("select-screen", Fselect_screen, Sselect_screen, 1, 2, 0,
  "Select the screen S.  S's selected window becomes \"the\"\n\
selected window.  If the optional parameter NO-ENTER is non-nil, don't
focus on that screen.")
  (screen, no_enter)
     Lisp_Object screen, no_enter;
{
  CHECK_SCREEN (screen, 0);

  if (selected_screen == XSCREEN (screen))
    return screen;

  selected_screen = XSCREEN (screen);
  Fselect_window (XSCREEN (screen)->selected_window);

#ifdef HAVE_X_WINDOWS
#ifdef MULTI_SCREEN
  if (XSCREEN (screen)->output_method == output_x_window
      && NULL (no_enter))
    {
      Ffocus_screen (screen);
    }
#endif
#endif
  choose_minibuf_screen ();

  return screen;
}

DEFUN ("selected-screen", Fselected_screen, Sselected_screen, 0, 0, 0,
  "Return the screen that is now selected.")
  ()
{
  Lisp_Object tem;
  XSET (tem, Lisp_Screen, selected_screen);
  return tem;
}

DEFUN ("window-screen", Fwindow_screen, Swindow_screen, 1, 1, 0,
  "Return the screen object that window WINDOW is on.")
  (window)
     Lisp_Object window;
{
  CHECK_WINDOW (window, 0);
  return XWINDOW (window)->screen;
}

DEFUN ("screen-root-window", Fscreen_root_window, Sscreen_root_window, 0, 1, 0,
       "Returns the root-window of SCREEN.")
  (screen)
     Lisp_Object screen;
{
  if (NULL (screen))
    XSET (screen, Lisp_Screen, selected_screen);
  CHECK_SCREEN (screen, 0);

  return XSCREEN (screen)->root_window;
}

DEFUN ("screen-selected-window", Fscreen_selected_window,
       Sscreen_selected_window, 0, 1, 0,
  "Return the selected window of screen object SCREEN.")
  (screen)
     Lisp_Object screen;
{
  if (NULL (screen))
    XSET (screen, Lisp_Screen, selected_screen);
  CHECK_SCREEN (screen, 0);

  return XSCREEN (screen)->selected_window;
}

DEFUN ("screen-list", Fscreen_list, Sscreen_list,
       0, 0, 0,
       "Return a list of all screens.")
  ()
{
  return Fcopy_sequence (Vscreen_list);
}

#ifdef MULTI_SCREEN
Lisp_Object
next_screen (screen, mini_screen)
     Lisp_Object screen;
     int mini_screen;
{
  Lisp_Object tail;
  int passed = 0;

  while (1)
    for (tail = Vscreen_list; CONSP (tail); tail = XCONS (tail)->cdr)
      {
	if (passed)
Jim Blandy's avatar
Jim Blandy committed
320 321 322 323 324 325 326 327
	  if (!mini_screen)
	    {
	      SCREEN_PTR s = XSCREEN (XCONS (tail)->car);

	      if (EQ (XCONS (tail)->car, Vglobal_minibuffer_screen)
		  && EQ (s->root_window, s->minibuffer_window))
		continue;
	    }
Jim Blandy's avatar
Jim Blandy committed
328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361
	  else
	    return XCONS (tail)->car;

	if (EQ (screen, XCONS (tail)->car))
	  passed++;
      }
}

Lisp_Object
prev_screen (screen, mini_screen)
     Lisp_Object screen;
     int mini_screen;
{
  Lisp_Object tail;
  Lisp_Object prev;

  prev = Qnil;
  while (1)
    for (tail = Vscreen_list; CONSP (tail); tail = XCONS (tail)->cdr)
      {
	if (EQ (screen, XCONS (tail)->car))
	  {
	    if (!NULL (prev) && (mini_screen
				 || !EQ (XCONS (tail)->car,
					 Vglobal_minibuffer_screen)))
	      return prev;
	  }
	prev = XCONS (tail)->car;
      }
}

DEFUN ("next-screen", Fnext_screen, Snext_screen,
       0, 2, 0,
       "Return the next screen in the screen list after SCREEN.\n\
Jim Blandy's avatar
Jim Blandy committed
362 363
If MINISCREEN is non-nil, include screens whose only window is a minibuffer.\n\
If MINISCREEN is nil or omitted, these screens are skipped.")
Jim Blandy's avatar
Jim Blandy committed
364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 546 547 548 549 550 551 552 553 554 555 556 557 558 559 560 561 562 563 564 565 566 567 568 569 570 571 572 573 574 575 576 577 578 579 580 581 582 583 584 585 586 587 588 589 590 591 592 593 594 595 596 597 598 599 600 601 602 603 604 605 606 607 608 609 610 611 612 613 614 615 616 617 618 619 620 621 622 623 624 625 626 627 628 629 630 631 632 633 634 635 636 637 638 639 640 641 642 643 644 645 646 647 648 649 650 651 652 653 654 655 656 657 658 659 660 661 662 663 664 665 666 667 668 669 670 671 672 673 674 675 676 677 678 679 680 681 682 683 684 685 686 687 688 689 690 691 692 693 694 695 696 697 698 699 700 701 702 703 704 705 706 707 708 709 710 711 712 713 714 715 716 717 718 719 720 721 722 723 724 725 726 727 728 729 730 731 732 733 734 735 736 737 738 739 740 741 742 743 744 745 746 747 748 749 750 751 752 753 754 755 756 757 758 759 760 761 762 763 764 765 766 767 768 769 770 771 772 773 774 775 776 777 778 779 780 781 782 783 784 785 786 787 788 789 790 791 792 793 794 795 796 797 798 799 800 801 802 803 804 805 806 807 808 809 810 811 812 813 814 815 816 817 818 819 820 821 822 823 824 825 826 827 828 829 830 831 832 833 834 835 836 837 838 839 840 841 842 843 844 845 846 847 848 849 850 851 852 853 854 855 856 857 858 859 860 861 862 863 864 865 866 867 868 869 870 871 872 873 874 875 876 877 878 879 880 881 882 883 884 885 886 887 888 889 890 891 892 893 894 895 896 897 898 899 900 901 902 903 904
  (screen, miniscreen)
Lisp_Object screen, miniscreen;
{
  Lisp_Object tail;

  if (NULL (screen))
    XSET (screen, Lisp_Screen, selected_screen);
  CHECK_SCREEN (screen, 0);

  return next_screen (screen, (NULL (miniscreen) ? 0 : 1));
}
#endif /* MULTI_SCREEN */

DEFUN ("delete-screen", Fdelete_screen, Sdelete_screen,
       0, 1, "",
       "Delete SCREEN, permanently eliminating it from use.\n\
Default is current screen.")
  (screen)
     Lisp_Object screen;
{
  struct screen *s;
  union display displ;

  if (EQ (screen, Qnil))
    {
      s = selected_screen;
      XSET (screen, Lisp_Screen, s);
    }
  else
    {
      CHECK_SCREEN (screen, 0);
      s = XSCREEN (screen);
    }

  /* Don't allow deleted screen to remain selected.  */
  if (s == selected_screen)
    {
      Lisp_Object next;

      next = next_screen (screen, 0);
      if (EQ (next, screen))
	error ("Attempt to delete the only screen");
      Fselect_screen (next, Qnil);
    }

  /* Don't allow the global minibuffer screen to be deleted */
  if (s == XSCREEN (Vglobal_minibuffer_screen))
    error ("Attempt to delete the global minibuffer screen");

  /* Don't allow minibuf_window to remain on a deleted screen.  */
  if (EQ (s->minibuffer_window, minibuf_window))
    {
      Fset_window_buffer (selected_screen->minibuffer_window,
			  XWINDOW (minibuf_window)->buffer);
      minibuf_window = selected_screen->minibuffer_window;
    }

  Vscreen_list = Fdelq (screen, Vscreen_list);
  s->visible = 0;
  displ = s->display;
  s->display.nothing = 0;

  if (s->output_method == output_x_window)
    x_destroy_window (s, displ);

  return Qnil;
}

/* Return mouse position in character cell units.  */

static
read_mouse_position (screen, x, y)
     Lisp_Object screen;
     int *x, *y;
{
  CHECK_SCREEN (screen, 0);

  *x = 1;
  *y = 1;

#ifdef HAVE_X_WINDOWS
  if (XSCREEN (screen)->output_method == output_x_window)
    x_read_mouse_position (XSCREEN (screen), x, y);
#endif
}

DEFUN ("read-mouse-position", Fread_mouse_position, Sread_mouse_position, 1, 1, 0,
  "Return a cons (x . y) which represents the position of the mouse.")
  (screen)
     Lisp_Object screen;
{
  int x, y;
  struct screen *s;

  CHECK_SCREEN (screen, 0);

  read_mouse_position (screen, &x, &y);
  return Fcons (make_number (x), make_number (y));
}

DEFUN ("set-mouse-position", Fset_mouse_position, Sset_mouse_position, 3, 3, 0,
  "Move the mouse pointer to the center of cell (X,Y) in SCREEN.\n\
WARNING:  If you use this under X, you should do unfocus-screen afterwards.")
  (screen, x, y)
     Lisp_Object screen, x, y;
{
  CHECK_SCREEN (screen, 0);
  CHECK_NUMBER (x, 2);
  CHECK_NUMBER (y, 1);

#ifdef HAVE_X_WINDOWS
  if (XSCREEN (screen)->output_method == output_x_window)
    /* Warping the mouse will cause  enternotify and focus events. */
    x_set_mouse_position (XSCREEN (screen), x, y);
#endif

  return Qnil;
}

#if 0
/* ??? Can this be replaced with a Lisp function?
   It is used in minibuf.c.  Can we get rid of that?  */

DEFUN ("screen-configuration", Fscreen_configuration, Sscreen_configuration,
       0, 0, 0,
  "Return object describing current screen configuration.\n\
The screen configuration is the current mouse position and selected screen.\n\
This object can be given to `restore-screen-configuration'\n\
to restore this screen configuration.")
  ()
{
  int x, y;
  Lisp_Object c, screen;
  struct screen *s;
  
  c = Fmake_vector (make_number(3), Qnil);
  XVECTOR (c)->contents[0] = screen = Fselected_screen();
  read_mouse_position (screen, &x, &y);
  XVECTOR (c)->contents[1] = make_number (x);
  XVECTOR (c)->contents[2] = make_number (y);

  return c;
}

DEFUN ("restore-screen-configuration", Frestore_screen_configuration,
       Srestore_screen_configuration,
       1, 1, 0,
  "Restores screen configuration CONFIGURATION.")
  (config)
  Lisp_Object config;
{
  Lisp_Object x_pos, y_pos, screen;

  CHECK_VECTOR (config, 0);
  if (XVECTOR (config)->size != 3)
    {
      error ("Wrong size vector passed to restore-screen-configuration");
    }
  screen = XVECTOR (config)->contents[0];
  CHECK_SCREEN (screen, 0);

  Fselect_screen (screen, Qnil);

#if 0
  /* This seems to interfere with the screen selection mechanism. jla */
  x_pos = XVECTOR (config)->contents[1];
  y_pos = XVECTOR (config)->contents[2];
  set_mouse_position (screen, XINT (x_pos), XINT (y_pos));
#endif

  return screen;
}    
#endif

DEFUN ("make-screen-visible", Fmake_screen_visible, Smake_screen_visible,
       1, 1, 0,
  "Make the screen SCREEN visible (assuming it is an X-window).\n\
Also raises the screen so that nothing obscures it.")
  (screen)
     Lisp_Object screen;
{
  CHECK_SCREEN (screen, 0);

  if (XSCREEN (screen)->display.nothing == 0)
    error ("Cannot make a dead screen object visible");

  if (XSCREEN (screen)->output_method == output_x_window)
    x_make_screen_visible (XSCREEN (screen));

  return screen;
}

DEFUN ("make-screen-invisible", Fmake_screen_invisible, Smake_screen_invisible,
       1, 1, 0,
  "Make the screen SCREEN invisible (assuming it is an X-window).")
  (screen)
     Lisp_Object screen;
{
  CHECK_SCREEN (screen, 0);

  if (XSCREEN (screen)->output_method == output_x_window)
    x_make_screen_invisible (XSCREEN (screen));

  return Qnil;
}

DEFUN ("iconify-screen", Ficonify_screen, Siconify_screen,
       1, 1, 0,
  "Make the screen SCREEN into an icon.")
  (screen)
     Lisp_Object screen;
{
  CHECK_SCREEN (screen, 0);

  if (XSCREEN (screen)->display.nothing == 0)
    error ("Cannot make a dead screen object iconified.");

  if (XSCREEN (screen)->output_method == output_x_window)
      x_iconify_screen (XSCREEN (screen));

  return Qnil;
}

DEFUN ("deiconify-screen", Fdeiconify_screen, Sdeiconify_screen,
       1, 1, 0,
  "Open (de-iconify) the iconified screen SCREEN.")
  (screen)
     Lisp_Object screen;
{
  CHECK_SCREEN (screen, 0);

  if (XSCREEN (screen)->display.nothing == 0)
    error ("Cannot deiconify a dead screen object.");

  if (XSCREEN (screen)->output_method == output_x_window)
      x_make_screen_visible (XSCREEN (screen));

  return screen;
}

DEFUN ("screen-visible-p", Fscreen_visible_p, Sscreen_visible_p,
       1, 1, 0,
       "Return t if SCREEN is now \"visible\" (actually in use for display).\n\
A screen that is not \"visible\" is not updated and, if it works through\n\
a window system, it may not show at all.\n\
Return the symbol `icon' if window is visible only as an icon.")
  (screen)
     Lisp_Object screen;
{
  CHECK_SCREEN (screen, 0);

  if (XSCREEN (screen)->visible)
    return Qt;
  if (XSCREEN (screen)->iconified)
    return intern ("icon");
  return Qnil;
}

DEFUN ("visible-screen-list", Fvisible_screen_list, Svisible_screen_list,
       0, 0, 0,
       "Return a list of all screens now \"visible\" (being updated).")
  ()
{
  Lisp_Object tail, screen;
  struct screen *s;
  Lisp_Object value;

  value = Qnil;
  for (tail = Vscreen_list; CONSP (tail); tail = XCONS (tail)->cdr)
    {
      screen = XCONS (tail)->car;
      if (XTYPE (screen) != Lisp_Screen)
	continue;
      s = XSCREEN (screen);
      if (s->visible)
	value = Fcons (screen, value);
    }
  return value;
}

Lisp_Object
get_screen_param (screen, prop)
     register struct screen *screen;
     Lisp_Object prop;
{
  register Lisp_Object tem;

  tem = Fassq (prop, screen->param_alist);
  if (EQ (tem, Qnil))
    return tem;
  return Fcdr (tem);
}

void
store_in_alist (alistptr, propname, val)
     Lisp_Object *alistptr, val;
     char *propname;
{
  register Lisp_Object tem;
  register Lisp_Object prop;

  prop = intern (propname);
  tem = Fassq (prop, *alistptr);
  if (EQ (tem, Qnil))
    *alistptr = Fcons (Fcons (prop, val), *alistptr);
  else
    Fsetcdr (tem, val);
}

void
store_screen_param (s, prop, val)
     struct screen *s;
     Lisp_Object prop, val;
{
  register Lisp_Object tem;

  tem = Fassq (prop, s->param_alist);
  if (EQ (tem, Qnil))
    s->param_alist = Fcons (Fcons (prop, val), s->param_alist);
  else
    Fsetcdr (tem, val);
}

DEFUN ("screen-parameters", Fscreen_parameters, Sscreen_parameters, 0, 1, 0,
  "Return the parameters-alist of screen SCREEN.\n\
It is a list of elements of the form (PARM . VALUE), where PARM is a symbol.\n\
The meaningful PARMs depend on the kind of screen.")
  (screen)
     Lisp_Object screen;
{
  Lisp_Object alist;
  struct screen *s;

  if (EQ (screen, Qnil))
    s = selected_screen;
  else
    {
      CHECK_SCREEN (screen, 0);
      s = XSCREEN (screen);
    }

  if (s->display.nothing == 0)
    return Qnil;

  alist = Fcopy_alist (s->param_alist);
  store_in_alist (&alist, "name", s->name);
  store_in_alist (&alist, "height", make_number (s->height));
  store_in_alist (&alist, "width", make_number (s->width));
  store_in_alist (&alist, "modeline", (s->wants_modeline ? Qt : Qnil));
  store_in_alist (&alist, "minibuffer", (s->has_minibuffer ? Qt : Qnil));
  store_in_alist (&alist, "unsplittable", (s->no_split ? Qt : Qnil));

  if (s->output_method == output_x_window)
    x_report_screen_params (s, &alist);
  return alist;
}

DEFUN ("modify-screen-parameters", Fmodify_screen_parameters, 
       Smodify_screen_parameters, 2, 2, 0,
  "Modify the parameters of screen SCREEN according to ALIST.\n\
ALIST is an alist of parameters to change and their new values.\n\
Each element of ALIST has the form (PARM . VALUE), where PARM is a symbol.\n\
The meaningful PARMs depend on the kind of screen; undefined PARMs are ignored.")
  (screen, alist)
     Lisp_Object screen, alist;
{
  register struct screen *s;
  register Lisp_Object tail, elt, prop, val;

  if (EQ (screen, Qnil))
    s = selected_screen;
  else
    {
      CHECK_SCREEN (screen, 0);
      s = XSCREEN (screen);
    }

  if (s->display.nothing == 0)
    error ("Cannot modify parameters of a deleted screen");

  if (s->output_method == output_x_window)
    for (tail = alist; !EQ (tail, Qnil); tail = Fcdr (tail))
      {
	elt = Fcar (tail);
	prop = Fcar (elt);
	val = Fcdr (elt);
	x_set_screen_param (s, prop, val,
			    get_screen_param (s, prop));
	store_screen_param (s, prop, val);
      }

  return Qnil;
}


DEFUN ("screen-pixel-size", Fscreen_pixel_size, 
       Sscreen_pixel_size, 1, 1, 0,
  "Return a cons (width . height) of screen SCREEN's dimensions.")
  (screen)
     Lisp_Object screen;
{
  register struct screen *s;
  int width, height;

  CHECK_SCREEN (screen, 0);
  s = XSCREEN (screen);
  
  return Fcons (make_number (x_pixel_width (s)),
		make_number (x_pixel_height (s)));
}

DEFUN ("screen-height", Fscreen_height, Sscreen_height, 0, 0, 0,
  "Return number of lines available for display on selected screen.")
  ()
{
  return make_number (SCREEN_HEIGHT (selected_screen));
}

DEFUN ("screen-width", Fscreen_width, Sscreen_width, 0, 0, 0,
  "Return number of columns available for display on selected screen.")
  ()
{
  return make_number (SCREEN_WIDTH (selected_screen));
}

DEFUN ("set-screen-height", Fset_screen_height, Sset_screen_height, 2, 3, 0,
  "Specify that the screen SCREEN has LINES lines.\n\
Optional third arg non-nil means that redisplay should use LINES lines\n\
but that the idea of the actual height of the screen should not be changed.")
  (screen, rows, pretend)
     Lisp_Object rows, pretend;
{
  register struct screen *s;

  CHECK_NUMBER (rows, 0);
  if (NULL (screen))
    s = selected_screen;
  else
    {
      CHECK_SCREEN (screen, 0);
      s = XSCREEN (screen);
    }

  if (s->output_method == output_x_window)
    {
      if (XINT (rows) != s->width)
	x_set_window_size (s, s->width, XINT (rows));
    }
  else
    change_screen_size (s, XINT (rows), 0, !NULL (pretend));
  return Qnil;
}

DEFUN ("set-screen-width", Fset_screen_width, Sset_screen_width, 2, 3, 0,
  "Specify that the screen SCREEN has COLS columns.\n\
Optional third arg non-nil means that redisplay should use COLS columns\n\
but that the idea of the actual width of the screen should not be changed.")
  (screen, cols, pretend)
     Lisp_Object cols, pretend;
{
  register struct screen *s;
  CHECK_NUMBER (cols, 0);
  if (NULL (screen))
    s = selected_screen;
  else
    {
      CHECK_SCREEN (screen, 0);
      s = XSCREEN (screen);
    }

  if (s->output_method == output_x_window)
    {
      if (XINT (cols) != s->width)
	x_set_window_size (s, XINT (cols), s->height);
    }
  else
    change_screen_size (selected_screen, 0, XINT (cols), !NULL (pretend));
  return Qnil;
}

DEFUN ("set-screen-size", Fset_screen_size, 
       Sset_screen_size, 3, 3, 0,
  "Sets size of SCREEN to COLS by ROWS, measured in characters.")
  (screen, cols, rows)
     Lisp_Object screen, cols, rows;
{
  register struct screen *s;
  int mask;

  CHECK_SCREEN (screen, 0);
  CHECK_NUMBER (cols, 2);
  CHECK_NUMBER (rows, 1);
  s = XSCREEN (screen);

  if (s->output_method == output_x_window)
    {
      if (XINT (rows) != s->height || XINT (cols) != s->width)
	x_set_window_size (s, XINT (cols), XINT (rows));
    }
  else
    change_screen_size (s, XINT (rows), XINT (cols), 0);

  return Qnil;
}

DEFUN ("set-screen-position", Fset_screen_position, 
       Sset_screen_position, 3, 3, 0,
  "Sets size of SCREEN in pixels to XOFFSET by YOFFSET.")
  (screen, xoffset, yoffset)
     Lisp_Object screen, xoffset, yoffset;
{
  register struct screen *s;
  int mask;

  CHECK_SCREEN (screen, 0);
  CHECK_NUMBER (xoffset, 1);
  CHECK_NUMBER (yoffset, 2);
  s = XSCREEN (screen);

  if (s->output_method == output_x_window)
    x_set_offset (s, XINT (xoffset), XINT (yoffset));

  return Qt;
}

/* Test if column *x, row *y is within window *w.  If they are not,
   return 0;  if they are on the window's modeline, return -1; if
   they are in the window's text area (the only other alternative)
   set *x and *y to their locations relative to the upper left
   corner of the window, and return 1.  */
int
coordinates_in_window (w, x, y)
     register struct window *w;
     register int *x, *y;
{
  register int left = XINT (w->left);
  register int width = XINT (w->width);
  register int window_height = XINT (w->height);
  register int top = XFASTINT (w->top);

  if (*x < left || *x >= left + width
Jim Blandy's avatar
Jim Blandy committed
905
      || *y < top || *y > top + window_height - 1)
Jim Blandy's avatar
Jim Blandy committed
906 907 908 909 910 911 912 913 914 915 916 917 918 919 920 921 922 923 924 925 926 927 928 929 930 931 932 933 934 935 936 937 938 939 940 941 942 943 944 945 946 947 948 949 950 951 952 953 954 955 956 957 958 959 960 961 962 963 964 965 966 967 968 969 970 971 972 973 974 975 976 977 978 979 980 981 982 983 984 985 986 987 988 989 990 991 992 993 994 995 996 997 998 999 1000 1001 1002 1003 1004 1005 1006 1007 1008 1009 1010 1011 1012 1013 1014 1015 1016 1017 1018 1019 1020 1021 1022 1023 1024 1025 1026 1027 1028 1029 1030 1031 1032 1033 1034 1035 1036 1037 1038 1039 1040 1041 1042 1043 1044 1045 1046 1047 1048 1049 1050 1051 1052 1053 1054 1055 1056 1057 1058 1059 1060
    return 0;

  if (*y == top + window_height - 1
      && window_height > 1)	/* 1 line => minibuffer */
    /* in modeline */
    return -1;

  *x -= left;
  *y -= top;
  return 1;
}

DEFUN ("coordinates-in-window-p", Fcoordinates_in_window_p,
  Scoordinates_in_window_p, 2, 2, 0,
  "Return non-nil if COORDINATES are in WINDOW.\n\
COORDINATES is a cons of the form (X Y), X and Y being screen-relative.\n\
If COORDINATES are in the text portion of WINDOW, the coordinates relative\n\
to the window are returned.  If they are in the modeline of WINDOW, t is\n\
returned.")
  (coordinates, window)
     register Lisp_Object coordinates, window;
{
  int x, y;

  CHECK_WINDOW (window, 0);
  CHECK_CONS (coordinates, 1);
  x = XINT (Fcar (coordinates));
  y = XINT (Fcar (Fcdr (coordinates)));

  switch (coordinates_in_window (XWINDOW (window), &x, &y))
    {
    case -1:			/* In modeline of window. */
      return Qt;

    case 0:			/* NOT in window at all. */
      return Qnil;

    case 1:			/* In text part of window. */
      return Fcons (x, Fcons (y, Qnil));

    default:
      abort ();
    }
}

#ifndef HAVE_X11
DEFUN ("rubber-band-rectangle", Frubber_band_rectangle, Srubber_band_rectangle,
       3, 3, "",
  "Ask user to specify a window position and size on SCREEN with the mouse.\n\
Arguments are SCREEN, NAME and GEO.  NAME is a name to be displayed as\n\
the purpose of this rectangle.  GEO is an X-windows size spec that can\n\
specify defaults for some sizes/positions.  If GEO specifies everything,\n\
the mouse is not used.\n\
Returns a list of five values: (SCREEN LEFT TOP WIDTH HEIGHT).")
  (screen, name, geo)
     Lisp_Object screen;
     Lisp_Object name;
     Lisp_Object geo;
{
  int vals[4];
  Lisp_Object nums[4];
  int i;

  CHECK_SCREEN (screen, 0);
  CHECK_STRING (name, 1);
  CHECK_STRING (geo, 2);

  switch (XSCREEN (screen)->output_method)
    {
    case output_x_window:
      x_rubber_band (XSCREEN (screen), &vals[0], &vals[1], &vals[2], &vals[3],
		     XSTRING (geo)->data, XSTRING (name)->data);
      break;

    default:
      return Qnil;
    }

  for (i = 0; i < 4; i++)
    XFASTINT (nums[i]) = vals[i];
  return Fcons (screen, Flist (4, nums));
  return Qnil;
}
#endif /* not HAVE_X11 */

choose_minibuf_screen ()
{
  /* For lowest-level minibuf, put it on currently selected screen
     if screen has a minibuffer.  */
  if (minibuf_level == 0
      && selected_screen != 0
      && !EQ (minibuf_window, selected_screen->minibuffer_window)
      && !EQ (Qnil, selected_screen->minibuffer_window))
    {
      Fset_window_buffer (selected_screen->minibuffer_window,
			  XWINDOW (minibuf_window)->buffer);
      minibuf_window = selected_screen->minibuffer_window;
    }
}

syms_of_screen ()
{
  Qscreenp = intern ("screenp");

  staticpro (&Vscreen_list);

  DEFVAR_LISP ("terminal-screen", &Vterminal_screen,
    "The initial screen-object, which represents Emacs's stdout.");

  DEFVAR_LISP ("emacs-iconified", &Vemacs_iconified,
    "Non-nil if all of emacs is iconified and not screen updates are needed.");
  Vemacs_iconified = Qnil;

  DEFVAR_LISP ("global-minibuffer-screen", &Vglobal_minibuffer_screen,
 "A screen whose minibuffer is used by minibufferless screens.\n\
When you create a minibufferless screen, by default it will use the\n\
minibuffer of this screen.  It is up to you to create a suitable screen\n\
and store it in this variable.");
  Vglobal_minibuffer_screen = Qnil;

  defsubr (&Sscreenp);
  defsubr (&Sselect_screen);
  defsubr (&Sselected_screen);
  defsubr (&Swindow_screen);
  defsubr (&Sscreen_root_window);
  defsubr (&Sscreen_selected_window);
  defsubr (&Sscreen_list);
  defsubr (&Snext_screen);
  defsubr (&Sdelete_screen);
  defsubr (&Sread_mouse_position);
  defsubr (&Sset_mouse_position);
#if 0
  defsubr (&Sscreen_configuration);
  defsubr (&Srestore_screen_configuration);
#endif
  defsubr (&Smake_screen_visible);
  defsubr (&Smake_screen_invisible);
  defsubr (&Siconify_screen);
  defsubr (&Sdeiconify_screen);
  defsubr (&Sscreen_visible_p);
  defsubr (&Svisible_screen_list);
  defsubr (&Sscreen_parameters);
  defsubr (&Smodify_screen_parameters);
  defsubr (&Sscreen_pixel_size);
  defsubr (&Sscreen_height);
  defsubr (&Sscreen_width);
  defsubr (&Sset_screen_height);
  defsubr (&Sset_screen_width);
  defsubr (&Sset_screen_size);
  defsubr (&Sset_screen_position);
  defsubr (&Scoordinates_in_window_p);
#ifndef HAVE_X11
  defsubr (&Srubber_band_rectangle);
#endif	/* HAVE_X11 */
}