src/frame.h

   1 /* Define frame-object for GNU Emacs.
   2    Copyright (C) 1993, 1994 Free Software Foundation, Inc.
   3
   4 This file is part of GNU Emacs.
   5
   6 GNU Emacs is free software; you can redistribute it and/or modify
   7 it under the terms of the GNU General Public License as published by
   8 the Free Software Foundation; either version 2, or (at your option)
   9 any later version.
  10
  11 GNU Emacs is distributed in the hope that it will be useful,
  12 but WITHOUT ANY WARRANTY; without even the implied warranty of
  13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14 GNU General Public License for more details.
  15
  16 You should have received a copy of the GNU General Public License
  17 along with GNU Emacs; see the file COPYING.  If not, write to
  18 the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.  */
  19
  20 \f
  21 /* Miscellanea.  */
  22
  23 /* Nonzero means don't assume anything about current
  24    contents of actual terminal frame */
  25 extern int frame_garbaged;
  26
  27 /* Nonzero means FRAME_MESSAGE_BUF (selected_frame) is being used by
  28    print.  */
  29 extern int message_buf_print;
  30
  31 \f
  32 /* The structure representing a frame.
  33
  34    We declare this even if MULTI_FRAME is not defined, because when
  35    we lack multi-frame support, we use one instance of this structure
  36    to represent the one frame we support.  This is cleaner than
  37    having miscellaneous random variables scattered about.  */
  38
  39 enum output_method
  40 { output_termcap, output_x_window, output_msdos_raw };
  41
  42 struct frame
  43 {
  44   EMACS_INT size;
  45   struct Lisp_Vector *next;
  46
  47   /* All Lisp_Object components must come first.
  48      Only EMACS_INT values can be intermixed with them.
  49      That ensures they are all aligned normally.  */
  50
  51   /* Name of this frame: a Lisp string.  See also `explicit_name'.  */
  52   Lisp_Object name;
  53
  54   /* The frame which should receive keystrokes that occur in this
  55      frame, or nil if they should go to the frame itself.  This is
  56      usually nil, but if the frame is minibufferless, we can use this
  57      to redirect keystrokes to a surrogate minibuffer frame when
  58      needed.
  59
  60      Note that a value of nil is different than having the field point
  61      to the frame itself.  Whenever the Fselect_frame function is used
  62      to shift from one frame to the other, any redirections to the
  63      original frame are shifted to the newly selected frame; if
  64      focus_frame is nil, Fselect_frame will leave it alone.  */
  65   Lisp_Object focus_frame;
  66
  67   /* This frame's root window.  Every frame has one.
  68      If the frame has only a minibuffer window, this is it.
  69      Otherwise, if the frame has a minibuffer window, this is its sibling.  */
  70   Lisp_Object root_window;
  71
  72   /* This frame's selected window.
  73      Each frame has its own window hierarchy
  74      and one of the windows in it is selected within the frame.
  75      The selected window of the selected frame is Emacs's selected window.  */
  76   Lisp_Object selected_window;
  77
  78   /* This frame's minibuffer window.
  79      Most frames have their own minibuffer windows,
  80      but only the selected frame's minibuffer window
  81      can actually appear to exist.  */
  82   Lisp_Object minibuffer_window;
  83
  84   /* Parameter alist of this frame.
  85      These are the parameters specified when creating the frame
  86      or modified with modify-frame-parameters.  */
  87   Lisp_Object param_alist;
  88
  89   /* List of scroll bars on this frame.
  90      Actually, we don't specify exactly what is stored here at all; the
  91      scroll bar implementation code can use it to store anything it likes.
  92      This field is marked by the garbage collector.  It is here
  93      instead of in the `display' structure so that the garbage
  94      collector doesn't need to look inside the window-system-dependent
  95      structure.  */
  96   Lisp_Object scroll_bars;
  97   Lisp_Object condemned_scroll_bars;
  98
  99   /* List of elements to display in the menu bar.
 100      The elements have the form (KEY STRING . nil) to start;
 101      when they are displayed, the hpos of the left edge goes in the cddr.  */
 102   Lisp_Object menu_bar_items;
 103
 104   /* Alist of elements (FACE-NAME . FACE-VECTOR-DATA).  */
 105   Lisp_Object face_alist;
 106
 107   /* A vector that records the entire structure of this frame's menu bar.
 108      For the format of the data, see extensive comments in xmenu.c.
 109      Only the X toolkit version uses this.  */
 110   Lisp_Object menu_bar_vector;
 111   /* Number of elements in the vector that have meaningful data.  */
 112   EMACS_INT menu_bar_items_used;
 113
 114   /* Predicate for selecting buffers for other-buffer.  */
 115   Lisp_Object buffer_predicate;
 116
 117   /* Beyond here, there should be no more Lisp_Object components.  */
 118
 119
 120   /* glyphs as they appear on the frame */
 121   struct frame_glyphs *current_glyphs;
 122
 123   /* glyphs we'd like to appear on the frame */
 124   struct frame_glyphs *desired_glyphs;
 125
 126   /* See do_line_insertion_deletion_costs for info on these arrays. */
 127   /* Cost of inserting 1 line on this frame */
 128   int *insert_line_cost;
 129   /* Cost of deleting 1 line on this frame */
 130   int *delete_line_cost;
 131   /* Cost of inserting n lines on this frame */
 132   int *insert_n_lines_cost;
 133   /* Cost of deleting n lines on this frame */
 134   int *delete_n_lines_cost;
 135
 136   /* glyphs for the mode line */
 137   struct frame_glyphs *temp_glyphs;
 138
 139   /* Intended cursor position of this frame.
 140      Measured in characters, counting from upper left corner
 141      within the frame.  */
 142   int cursor_x;
 143   int cursor_y;
 144
 145   /* Actual cursor position of this frame, and the character under it.
 146      (Not used for terminal frames.)  */
 147   int phys_cursor_x;
 148   int phys_cursor_y;
 149   /* This is handy for undrawing the cursor, because current_glyphs is
 150      not always accurate when in do_scrolling.  */
 151   GLYPH phys_cursor_glyph;
 152
 153   /* Size of this frame, in units of characters.  */
 154   EMACS_INT height;
 155   EMACS_INT width;
 156
 157   /* New height and width for pending size change.  0 if no change pending.  */
 158   int new_height, new_width;
 159
 160   /* The output method says how the contents of this frame
 161      are displayed.  It could be using termcap, or using an X window.  */
 162   enum output_method output_method;
 163
 164   /* A structure of auxiliary data used for displaying the contents.
 165      struct x_display is used for X window frames;
 166      it is defined in xterm.h.  */
 167   union display { struct x_display *x; int nothing; } display;
 168
 169   /* Number of lines of menu bar.  */
 170   int menu_bar_lines;
 171
 172 #ifdef USE_X_TOOLKIT
 173   /* Nonzero means using a menu bar that comes from the X toolkit.  */
 174   int external_menu_bar;
 175 #endif
 176
 177   /* Nonzero if last attempt at redisplay on this frame was preempted.  */
 178   char display_preempted;
 179
 180   /* visible is nonzero if the frame is currently displayed; we check
 181      it to see if we should bother updating the frame's contents.
 182      DON'T SET IT DIRECTLY; instead, use FRAME_SET_VISIBLE.
 183
 184      Note that, since invisible frames aren't updated, whenever a
 185      frame becomes visible again, it must be marked as garbaged.  The
 186      FRAME_SAMPLE_VISIBILITY macro takes care of this.
 187
 188      iconified is nonzero if the frame is currently iconified.
 189
 190      Asynchronous input handlers should NOT change these directly;
 191      instead, they should change async_visible or async_iconified, and
 192      let the FRAME_SAMPLE_VISIBILITY macro set visible and iconified
 193      at the next redisplay.
 194
 195      These should probably be considered read-only by everyone except
 196      FRAME_SAMPLE_VISIBILITY.
 197
 198      These two are mutually exclusive.  They might both be zero, if the
 199      frame has been made invisible without an icon.  */
 200   char visible, iconified;
 201
 202   /* Asynchronous input handlers change these, and
 203      FRAME_SAMPLE_VISIBILITY copies them into visible and iconified.
 204      See FRAME_SAMPLE_VISIBILITY, below.  */
 205 #ifdef __STDC__
 206   volatile
 207 #endif
 208   char async_visible, async_iconified;
 209
 210   /* Nonzero if this frame should be redrawn.  */
 211 #ifdef __STDC__
 212   volatile
 213 #endif
 214   char garbaged;
 215
 216   /* True if frame actually has a minibuffer window on it.
 217      0 if using a minibuffer window that isn't on this frame.  */
 218   char has_minibuffer;
 219
 220   /* 0 means, if this frame has just one window,
 221      show no modeline for that window.  */
 222   char wants_modeline;
 223
 224   /* Non-zero if the hardware device this frame is displaying on can
 225      support scroll bars.  */
 226   char can_have_scroll_bars;
 227
 228   /* If can_have_scroll_bars is non-zero, this is non-zero if we should
 229      actually display them on this frame.  */
 230   char has_vertical_scroll_bars;
 231
 232   /* Non-0 means raise this frame to the top of the heap when selected.  */
 233   char auto_raise;
 234
 235   /* Non-0 means lower this frame to the bottom of the stack when left.  */
 236   char auto_lower;
 237
 238   /* True if frame's root window can't be split.  */
 239   char no_split;
 240
 241   /* If this is set, then Emacs won't change the frame name to indicate
 242      the current buffer, etcetera.  If the user explicitly sets the frame
 243      name, this gets set.  If the user sets the name to Qnil, this is
 244      cleared.  */
 245   char explicit_name;
 246
 247   /* Storage for messages to this frame. */
 248   char *message_buf;
 249
 250   /* Nonnegative if current redisplay should not do scroll computation
 251      for lines beyond a certain vpos.  This is the vpos.  */
 252   int scroll_bottom_vpos;
 253
 254   /* Width of the scroll bar, in pixels and in characters.
 255      scroll_bar_cols tracks scroll_bar_pixel_width if the latter is positive;
 256      a zero value in scroll_bar_pixel_width means to compute the actual width
 257      on the fly, using scroll_bar_cols and the current font width.  */
 258   int scroll_bar_pixel_width;
 259   int scroll_bar_cols;
 260
 261   /* The baud rate that was used to calculate costs for this frame.  */
 262   int cost_calculation_baud_rate;
 263 };
 264
 265 #ifdef MULTI_FRAME
 266
 267 typedef struct frame *FRAME_PTR;
 268
 269 #define XFRAME(p) ((struct frame *) XPNTR (p))
 270 #define XSETFRAME(a, b) (XSETPSEUDOVECTOR (a, b, PVEC_FRAME))
 271
 272 #define WINDOW_FRAME(w) (w)->frame
 273
 274 #define FRAME_LIVE_P(f) ((f)->display.nothing != 0)
 275 #define FRAME_TERMCAP_P(f) ((f)->output_method == output_termcap)
 276 #define FRAME_X_P(f) ((f)->output_method == output_x_window)
 277 #define FRAME_MINIBUF_ONLY_P(f) \
 278   EQ (FRAME_ROOT_WINDOW (f), FRAME_MINIBUF_WINDOW (f))
 279 #define FRAME_HAS_MINIBUF_P(f) ((f)->has_minibuffer)
 280 #define FRAME_CURRENT_GLYPHS(f) (f)->current_glyphs
 281 #define FRAME_DESIRED_GLYPHS(f) (f)->desired_glyphs
 282 #define FRAME_TEMP_GLYPHS(f) (f)->temp_glyphs
 283 #define FRAME_HEIGHT(f) (f)->height
 284 #define FRAME_WIDTH(f) (f)->width
 285 #define FRAME_NEW_HEIGHT(f) (f)->new_height
 286 #define FRAME_NEW_WIDTH(f) (f)->new_width
 287 #define FRAME_MENU_BAR_LINES(f) (f)->menu_bar_lines
 288 #ifdef USE_X_TOOLKIT
 289 #define FRAME_EXTERNAL_MENU_BAR(f) (f)->external_menu_bar
 290 #else
 291 #define FRAME_EXTERNAL_MENU_BAR(f) 0
 292 #endif
 293 #define FRAME_CURSOR_X(f) (f)->cursor_x
 294 #define FRAME_CURSOR_Y(f) (f)->cursor_y
 295 #define FRAME_VISIBLE_P(f) ((f)->visible != 0)
 296 #define FRAME_SET_VISIBLE(f,p) \
 297   ((f)->async_visible = (p), FRAME_SAMPLE_VISIBILITY (f))
 298 #define SET_FRAME_GARBAGED(f) (frame_garbaged = 1, f->garbaged = 1)
 299 #define FRAME_GARBAGED_P(f) (f)->garbaged
 300 #define FRAME_NO_SPLIT_P(f) (f)->no_split
 301 #define FRAME_WANTS_MODELINE_P(f) (f)->wants_modeline
 302 #define FRAME_ICONIFIED_P(f) (f)->iconified
 303 #define FRAME_MINIBUF_WINDOW(f) (f)->minibuffer_window
 304 #define FRAME_ROOT_WINDOW(f) (f)->root_window
 305 #define FRAME_SELECTED_WINDOW(f) (f)->selected_window
 306 #define SET_GLYPHS_FRAME(glyphs,frame) ((glyphs)->frame = (frame))
 307 #define FRAME_INSERT_COST(f) (f)->insert_line_cost
 308 #define FRAME_DELETE_COST(f) (f)->delete_line_cost
 309 #define FRAME_INSERTN_COST(f) (f)->insert_n_lines_cost
 310 #define FRAME_DELETEN_COST(f) (f)->delete_n_lines_cost
 311 #define FRAME_MESSAGE_BUF(f) (f)->message_buf
 312 #define FRAME_SCROLL_BOTTOM_VPOS(f) (f)->scroll_bottom_vpos
 313 #define FRAME_FOCUS_FRAME(f) (f)->focus_frame
 314 #define FRAME_CAN_HAVE_SCROLL_BARS(f) ((f)->can_have_scroll_bars)
 315 #define FRAME_HAS_VERTICAL_SCROLL_BARS(f) ((f)->has_vertical_scroll_bars)
 316 #define FRAME_SCROLL_BAR_PIXEL_WIDTH(f) ((f)->scroll_bar_pixel_width)
 317 #define FRAME_SCROLL_BAR_COLS(f) ((f)->scroll_bar_cols)
 318 #define FRAME_SCROLL_BARS(f) ((f)->scroll_bars)
 319 #define FRAME_CONDEMNED_SCROLL_BARS(f) ((f)->condemned_scroll_bars)
 320 #define FRAME_MENU_BAR_ITEMS(f) ((f)->menu_bar_items)
 321 #define FRAME_COST_BAUD_RATE(f) ((f)->cost_calculation_baud_rate)
 322
 323 /* Emacs's redisplay code could become confused if a frame's
 324    visibility changes at arbitrary times.  For example, if a frame is
 325    visible while the desired glyphs are being built, but becomes
 326    invisible before they are updated, then some rows of the
 327    desired_glyphs will be left marked as enabled after redisplay is
 328    complete, which should never happen.  The next time the frame
 329    becomes visible, redisplay will probably barf.
 330
 331    Currently, there are no similar situations involving iconified, but
 332    the principle is the same.
 333
 334    So instead of having asynchronous input handlers directly set and
 335    clear the frame's visibility and iconification flags, they just set
 336    the async_visible and async_iconified flags; the redisplay code
 337    calls the FRAME_SAMPLE_VISIBILITY macro before doing any redisplay,
 338    which sets visible and iconified from their asynchronous
 339    counterparts.
 340
 341    Synchronous code must use the FRAME_SET_VISIBLE macro.
 342
 343    Also, if a frame used to be invisible, but has just become visible,
 344    it must be marked as garbaged, since redisplay hasn't been keeping
 345    up its contents.  */
 346 #define FRAME_SAMPLE_VISIBILITY(f) \
 347   (((f)->async_visible && ! (f)->visible) ? SET_FRAME_GARBAGED (f) : 0, \
 348    (f)->visible = (f)->async_visible, \
 349    (f)->iconified = (f)->async_iconified)
 350
 351 #define CHECK_FRAME(x, i)                               \
 352   {                                                     \
 353     if (! FRAMEP (x))                                   \
 354       x = wrong_type_argument (Qframep, (x));           \
 355   }
 356
 357 #define CHECK_LIVE_FRAME(x, i)                          \
 358   {                                                     \
 359     if (! FRAMEP (x)                                    \
 360         || ! FRAME_LIVE_P (XFRAME (x)))         \
 361       x = wrong_type_argument (Qframe_live_p, (x));     \
 362   }
 363
 364 /* FOR_EACH_FRAME (LIST_VAR, FRAME_VAR) followed by a statement is a
 365    `for' loop which iterates over the elements of Vframe_list.  The
 366    loop will set FRAME_VAR, a Lisp_Object, to each frame in
 367    Vframe_list in succession and execute the statement.  LIST_VAR
 368    should be a Lisp_Object too; it is used to iterate through the
 369    Vframe_list.
 370
 371    If MULTI_FRAME isn't defined, then this loop expands to something which
 372    executes the statement once.  */
 373 #define FOR_EACH_FRAME(list_var, frame_var)                     \
 374   for ((list_var) = Vframe_list;                                \
 375        (CONSP (list_var)                                        \
 376         && (frame_var = XCONS (list_var)->car, 1));             \
 377        list_var = XCONS (list_var)->cdr)
 378
 379
 380 extern Lisp_Object Qframep, Qframe_live_p, Qicon;
 381
 382 extern struct frame *selected_frame;
 383 extern struct frame *last_nonminibuf_frame;
 384
 385 extern struct frame *make_terminal_frame ();
 386 extern struct frame *make_frame ();
 387 extern struct frame *make_minibuffer_frame ();
 388 extern struct frame *make_frame_without_minibuffer ();
 389
 390 extern Lisp_Object Vframe_list;
 391 extern Lisp_Object Vdefault_frame_alist;
 392
 393 extern Lisp_Object Vterminal_frame;
 394 \f
 395 #else /* not MULTI_FRAME */
 396
 397 /* These definitions are used in a single-frame version of Emacs.  */
 398
 399 /* A frame we use to store all the data concerning the screen when we
 400    don't have multiple frames.  Remember, if you store any data in it
 401    which needs to be protected from GC, you should staticpro that
 402    element explicitly.  */
 403 extern struct frame the_only_frame;
 404
 405 typedef struct frame *FRAME_PTR;
 406 #ifdef __GNUC__
 407 /* A function call for always getting 0 is overkill, so... */
 408 #define WINDOW_FRAME(w) ({ Lisp_Object tem; XSETFASTINT (tem, 0); tem; })
 409 #else
 410 #define WINDOW_FRAME(w) (Fselected_frame ())
 411 #endif
 412 #define XSETFRAME(p, v) (p = WINDOW_FRAME (***bogus***))
 413 #define XFRAME(frame) (&the_only_frame)
 414
 415 extern FRAME_PTR selected_frame;
 416 extern FRAME_PTR last_nonminibuf_frame;
 417
 418 #define FRAME_LIVE_P(f) 1
 419 #ifdef MSDOS
 420 /* The following definitions could also be used in the non-MSDOS case,
 421    but the constants below lead to better code.  */
 422 #define FRAME_TERMCAP_P(f) (the_only_frame.output_method == output_termcap)
 423 #define FRAME_X_P(f) (the_only_frame.output_method != output_termcap)
 424 #else
 425 #define FRAME_TERMCAP_P(f) 1
 426 #define FRAME_X_P(f) 0
 427 #endif
 428 #define FRAME_MINIBUF_ONLY_P(f) 0
 429 #define FRAME_HAS_MINIBUF_P(f) 1
 430 #define FRAME_CURRENT_GLYPHS(f) (the_only_frame.current_glyphs)
 431 #define FRAME_DESIRED_GLYPHS(f) (the_only_frame.desired_glyphs)
 432 #define FRAME_TEMP_GLYPHS(f) (the_only_frame.temp_glyphs)
 433 #define FRAME_HEIGHT(f) (the_only_frame.height)
 434 #define FRAME_WIDTH(f) (the_only_frame.width)
 435 #define FRAME_NEW_HEIGHT(f) (the_only_frame.new_height)
 436 #define FRAME_NEW_WIDTH(f) (the_only_frame.new_width)
 437 #define FRAME_MENU_BAR_LINES(f) (the_only_frame.menu_bar_lines)
 438 #define FRAME_CURSOR_X(f) (the_only_frame.cursor_x)
 439 #define FRAME_CURSOR_Y(f) (the_only_frame.cursor_y)
 440 #define FRAME_SET_VISIBLE(f,p) (p)
 441 #define FRAME_VISIBLE_P(f) 1
 442 #define SET_FRAME_GARBAGED(f) (frame_garbaged = 1)
 443 #define FRAME_GARBAGED_P(f) (frame_garbaged)
 444 #define FRAME_NO_SPLIT_P(f) 0
 445 #define FRAME_WANTS_MODELINE_P(f) 1
 446 #define FRAME_ICONIFIED_P(f) 0
 447 #define FRAME_MINIBUF_WINDOW(f) (minibuf_window)
 448 #define FRAME_ROOT_WINDOW(f) (the_only_frame.root_window)
 449 #define FRAME_SELECTED_WINDOW(f) (selected_window)
 450 #define SET_GLYPHS_FRAME(glyphs,frame) do ; while (0)
 451 #define FRAME_INSERT_COST(frame)  (the_only_frame.insert_line_cost)
 452 #define FRAME_DELETE_COST(frame)  (the_only_frame.delete_line_cost)
 453 #define FRAME_INSERTN_COST(frame) (the_only_frame.insert_n_lines_cost)
 454 #define FRAME_DELETEN_COST(frame) (the_only_frame.delete_n_lines_cost)
 455 #define FRAME_MESSAGE_BUF(f) (the_only_frame.message_buf)
 456 #define FRAME_SCROLL_BOTTOM_VPOS(f) (the_only_frame.scroll_bottom_vpos)
 457 #define FRAME_FOCUS_FRAME(f) (Qnil)
 458 #define FRAME_CAN_HAVE_SCROLL_BARS(f) (the_only_frame.can_have_scroll_bars)
 459 #define FRAME_HAS_VERTICAL_SCROLL_BARS(f) \
 460   (the_only_frame.has_vertical_scroll_bars)
 461 #define FRAME_SCROLL_BAR_PIXEL_WIDTH(f) (the_only_frame.scroll_bar_pixel_width)
 462 #define FRAME_SCROLL_BAR_COLS(f) (the_only_frame.scroll_bar_cols)
 463 #define FRAME_SCROLL_BARS(f) (the_only_frame.scroll_bars)
 464 #define FRAME_CONDEMNED_SCROLL_BARS(f) (the_only_frame.condemned_scroll_bars)
 465 #define FRAME_MENU_BAR_ITEMS(f) (the_only_frame.menu_bar_items)
 466 #define FRAME_COST_BAUD_RATE(f) (the_only_frame.cost_calculation_baud_rate)
 467
 468 /* See comments in definition above.  */
 469 #define FRAME_SAMPLE_VISIBILITY(f) (0)
 470
 471 #define CHECK_FRAME(x, i) do; while (0)
 472 #define CHECK_LIVE_FRAME(x, y) do; while (0)
 473
 474 /* FOR_EACH_FRAME (LIST_VAR, FRAME_VAR) followed by a statement is a
 475    `for' loop which iterates over the elements of Vframe_list.  The
 476    loop will set FRAME_VAR, a Lisp_Object, to each frame in
 477    Vframe_list in succession and execute the statement.  LIST_VAR
 478    should be a Lisp_Object too; it is used to iterate through the
 479    Vframe_list.
 480
 481    If MULTI_FRAME _is_ defined, then this loop expands to a real
 482    `for' loop which traverses Vframe_list using LIST_VAR and
 483    FRAME_VAR.  */
 484 #define FOR_EACH_FRAME(list_var, frame_var)                     \
 485   for (list_var = Qt; frame_var = WINDOW_FRAME (***bogus***), ! NILP (list_var); list_var = Qnil)
 486
 487 #endif /* not MULTI_FRAME */
 488
 489 \f
 490 /* Device- and MULTI_FRAME-independent scroll bar stuff.  */
 491
 492 /* Return the starting column (zero-based) of the vertical scroll bar
 493    for window W.  The column before this one is the last column we can
 494    use for text.  If the window touches the right edge of the frame,
 495    we have extra space allocated for it.  Otherwise, the scroll bar
 496    takes over the window's rightmost columns.  */
 497 #define WINDOW_VERTICAL_SCROLL_BAR_COLUMN(w) \
 498   (((XINT ((w)->left) + XINT ((w)->width)) \
 499     < FRAME_WIDTH (XFRAME (WINDOW_FRAME (w)))) \
 500    ? (XINT ((w)->left) + XINT ((w)->width) \
 501       - FRAME_SCROLL_BAR_COLS (XFRAME (WINDOW_FRAME (w)))) \
 502    : FRAME_WIDTH (XFRAME (WINDOW_FRAME (w))))
 503
 504 /* Return the height in lines of the vertical scroll bar in w.  If the
 505    window has a mode line, don't make the scroll bar extend that far.  */
 506 #define WINDOW_VERTICAL_SCROLL_BAR_HEIGHT(w) (window_internal_height (w))