src/xterm.h

   1 /* Definitions and headers for communication with X protocol.
   2    Copyright (C) 1989, 1993-1994, 1998-2011 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 3 of the License, or
   9 (at your option) 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.  If not, see <http://www.gnu.org/licenses/>.  */
  18
  19 #include <X11/Xlib.h>
  20 #include <X11/cursorfont.h>
  21
  22 /* Include Xutil.h after keysym.h to work around a bug that prevents
  23    correct recognition of AltGr key in some X versions.  */
  24
  25 #include <X11/keysym.h>
  26 #include <X11/Xutil.h>
  27
  28 #include <X11/Xatom.h>
  29 #include <X11/Xresource.h>
  30
  31 #ifdef USE_X_TOOLKIT
  32 #include <X11/StringDefs.h>
  33 #include <X11/IntrinsicP.h>     /* CoreP.h needs this */
  34 #include <X11/CoreP.h>          /* foul, but we need this to use our own
  35                                    window inside a widget instead of one
  36                                    that Xt creates... */
  37 #include <X11/StringDefs.h>
  38
  39 typedef Widget xt_or_gtk_widget;
  40 #endif
  41
  42 #ifdef USE_GTK
  43 #include <gtk/gtk.h>
  44 #include <gdk/gdkx.h>
  45
  46 /* Some definitions to reduce conditionals.  */
  47 typedef GtkWidget *xt_or_gtk_widget;
  48 #define XtParent(x) (gtk_widget_get_parent (x))
  49 #undef XSync
  50 #define XSync(d, b) do { gdk_window_process_all_updates (); \
  51                          XSync (d, b);  } while (0)
  52
  53 /* The GtkTooltip API came in 2.12, but gtk-enable-tooltips in 2.14. */
  54 #if GTK_MAJOR_VERSION > 2 || GTK_MINOR_VERSION > 13
  55 #define USE_GTK_TOOLTIP
  56 #endif
  57
  58 #endif /* USE_GTK */
  59
  60 \f
  61 /* Bookkeeping to distinguish X versions.  */
  62
  63
  64 #ifdef HAVE_X_I18N
  65 #include <X11/Xlocale.h>
  66 #endif
  67 \f
  68 #define BLACK_PIX_DEFAULT(f) BlackPixel (FRAME_X_DISPLAY (f), \
  69                                          XScreenNumberOfScreen (FRAME_X_SCREEN (f)))
  70 #define WHITE_PIX_DEFAULT(f) WhitePixel (FRAME_X_DISPLAY (f), \
  71                                          XScreenNumberOfScreen (FRAME_X_SCREEN (f)))
  72
  73 #define FONT_WIDTH(f)   ((f)->max_width)
  74 #define FONT_HEIGHT(f)  ((f)->ascent + (f)->descent)
  75 #define FONT_BASE(f)    ((f)->ascent)
  76 #define FONT_DESCENT(f) ((f)->descent)
  77
  78 /* The mask of events that text windows always want to receive.  This
  79    includes mouse movement events, since handling the mouse-font text property
  80    means that we must track mouse motion all the time.  */
  81
  82 #define STANDARD_EVENT_SET      \
  83   (KeyPressMask                 \
  84    | ExposureMask               \
  85    | ButtonPressMask            \
  86    | ButtonReleaseMask          \
  87    | PointerMotionMask          \
  88    | StructureNotifyMask        \
  89    | FocusChangeMask            \
  90    | LeaveWindowMask            \
  91    | EnterWindowMask            \
  92    | VisibilityChangeMask)
  93
  94 #ifdef HAVE_X11R6_XIM
  95 /* Data structure passed to xim_instantiate_callback.  */
  96 struct xim_inst_t
  97 {
  98   struct x_display_info *dpyinfo;
  99   char *resource_name;
 100 };
 101 #endif /* HAVE_X11R6_XIM */
 102
 103 /* Structure recording X pixmap and reference count.
 104    If REFCOUNT is 0 then this record is free to be reused.  */
 105
 106 struct x_bitmap_record
 107 {
 108   Pixmap pixmap;
 109   int have_mask;
 110   Pixmap mask;
 111   char *file;
 112   int refcount;
 113   /* Record some info about this pixmap.  */
 114   int height, width, depth;
 115 };
 116 \f
 117 /* For each X display, we have a structure that records
 118    information about it.  */
 119
 120 struct x_display_info
 121 {
 122   /* Chain of all x_display_info structures.  */
 123   struct x_display_info *next;
 124
 125   /* The generic display parameters corresponding to this X display. */
 126   struct terminal *terminal;
 127
 128   /* Connection number (normally a file descriptor number).  */
 129   int connection;
 130
 131   /* This says how to access this display in Xlib.  */
 132   Display *display;
 133
 134   /* This is a cons cell of the form (NAME . FONT-LIST-CACHE).
 135      The same cons cell also appears in x_display_name_list.  */
 136   Lisp_Object name_list_element;
 137
 138   /* Number of frames that are on this display.  */
 139   int reference_count;
 140
 141   /* The Screen this connection is connected to.  */
 142   Screen *screen;
 143
 144   /* Dots per inch of the screen.  */
 145   double resx, resy;
 146
 147   /* The Visual being used for this display.  */
 148   Visual *visual;
 149
 150   /* The colormap being used.  */
 151   Colormap cmap;
 152
 153   /* Number of planes on this screen.  */
 154   int n_planes;
 155
 156   /* Mask of things that cause the mouse to be grabbed.  */
 157   int grabbed;
 158
 159   /* Emacs bitmap-id of the default icon bitmap for this frame.
 160      Or -1 if none has been allocated yet.  */
 161   ptrdiff_t icon_bitmap_id;
 162
 163   /* The root window of this screen.  */
 164   Window root_window;
 165
 166   /* Client leader window.  */
 167   Window client_leader_window;
 168
 169   /* The cursor to use for vertical scroll bars.  */
 170   Cursor vertical_scroll_bar_cursor;
 171
 172   /* The invisible cursor used for pointer blanking.  */
 173   Cursor invisible_cursor;
 174
 175 #ifdef USE_GTK
 176   /* The GDK cursor for scroll bars and popup menus.  */
 177   GdkCursor *xg_cursor;
 178 #endif
 179
 180   /* X Resource data base */
 181   XrmDatabase xrdb;
 182
 183   /* Minimum width over all characters in all fonts in font_table.  */
 184   int smallest_char_width;
 185
 186   /* Minimum font height over all fonts in font_table.  */
 187   int smallest_font_height;
 188
 189   /* Reusable Graphics Context for drawing a cursor in a non-default face. */
 190   GC scratch_cursor_gc;
 191
 192   /* Information about the range of text currently shown in
 193      mouse-face.  */
 194   Mouse_HLInfo mouse_highlight;
 195
 196   char *x_id_name;
 197
 198   /* The number of fonts opened for this display.  */
 199   int n_fonts;
 200
 201   /* Pointer to bitmap records.  */
 202   struct x_bitmap_record *bitmaps;
 203
 204   /* Allocated size of bitmaps field.  */
 205   ptrdiff_t bitmaps_size;
 206
 207   /* Last used bitmap index.  */
 208   ptrdiff_t bitmaps_last;
 209
 210   /* Which modifier keys are on which modifier bits?
 211
 212      With each keystroke, X returns eight bits indicating which modifier
 213      keys were held down when the key was pressed.  The interpretation
 214      of the top five modifier bits depends on what keys are attached
 215      to them.  If the Meta_L and Meta_R keysyms are on mod5, then mod5
 216      is the meta bit.
 217
 218      meta_mod_mask is a mask containing the bits used for the meta key.
 219      It may have more than one bit set, if more than one modifier bit
 220      has meta keys on it.  Basically, if EVENT is a KeyPress event,
 221      the meta key is pressed if (EVENT.state & meta_mod_mask) != 0.
 222
 223      shift_lock_mask is LockMask if the XK_Shift_Lock keysym is on the
 224      lock modifier bit, or zero otherwise.  Non-alphabetic keys should
 225      only be affected by the lock modifier bit if XK_Shift_Lock is in
 226      use; XK_Caps_Lock should only affect alphabetic keys.  With this
 227      arrangement, the lock modifier should shift the character if
 228      (EVENT.state & shift_lock_mask) != 0.  */
 229   int meta_mod_mask, shift_lock_mask;
 230
 231   /* These are like meta_mod_mask, but for different modifiers.  */
 232   int alt_mod_mask, super_mod_mask, hyper_mod_mask;
 233
 234   /* Communication with window managers.  */
 235   Atom Xatom_wm_protocols;
 236
 237   /* Kinds of protocol things we may receive.  */
 238   Atom Xatom_wm_take_focus;
 239   Atom Xatom_wm_save_yourself;
 240   Atom Xatom_wm_delete_window;
 241
 242   /* Atom for indicating window state to the window manager.  */
 243   Atom Xatom_wm_change_state;
 244
 245   /* Other WM communication */
 246   Atom Xatom_wm_configure_denied; /* When our config request is denied */
 247   Atom Xatom_wm_window_moved;     /* When the WM moves us.  */
 248   Atom Xatom_wm_client_leader;    /* Id of client leader window.  */
 249
 250   /* EditRes protocol */
 251   Atom Xatom_editres;
 252
 253   /* More atoms, which are selection types.  */
 254   Atom Xatom_CLIPBOARD, Xatom_TIMESTAMP, Xatom_TEXT, Xatom_DELETE,
 255   Xatom_COMPOUND_TEXT, Xatom_UTF8_STRING,
 256   Xatom_MULTIPLE, Xatom_INCR, Xatom_EMACS_TMP, Xatom_TARGETS, Xatom_NULL,
 257   Xatom_ATOM, Xatom_ATOM_PAIR, Xatom_CLIPBOARD_MANAGER;
 258
 259   /* More atoms for font properties.  The last three are private
 260      properties, see the comments in src/fontset.h.  */
 261   Atom Xatom_PIXEL_SIZE, Xatom_AVERAGE_WIDTH,
 262   Xatom_MULE_BASELINE_OFFSET, Xatom_MULE_RELATIVE_COMPOSE,
 263   Xatom_MULE_DEFAULT_ASCENT;
 264
 265   /* More atoms for Ghostscript support.  */
 266   Atom Xatom_DONE, Xatom_PAGE;
 267
 268   /* Atom used in toolkit scroll bar client messages.  */
 269   Atom Xatom_Scrollbar;
 270
 271   /* Atom used in XEmbed client messages.  */
 272   Atom Xatom_XEMBED, Xatom_XEMBED_INFO;
 273
 274   /* The frame (if any) which has the X window that has keyboard focus.
 275      Zero if none.  This is examined by Ffocus_frame in xfns.c.  Note
 276      that a mere EnterNotify event can set this; if you need to know the
 277      last frame specified in a FocusIn or FocusOut event, use
 278      x_focus_event_frame.  */
 279   struct frame *x_focus_frame;
 280
 281   /* The last frame mentioned in a FocusIn or FocusOut event.  This is
 282      separate from x_focus_frame, because whether or not LeaveNotify
 283      events cause us to lose focus depends on whether or not we have
 284      received a FocusIn event for it.  */
 285   struct frame *x_focus_event_frame;
 286
 287   /* The frame which currently has the visual highlight, and should get
 288      keyboard input (other sorts of input have the frame encoded in the
 289      event).  It points to the X focus frame's selected window's
 290      frame.  It differs from x_focus_frame when we're using a global
 291      minibuffer.  */
 292   struct frame *x_highlight_frame;
 293
 294   /* The gray pixmap.  */
 295   Pixmap gray;
 296
 297 #ifdef HAVE_X_I18N
 298   /* XIM (X Input method).  */
 299   XIM xim;
 300   XIMStyles *xim_styles;
 301   struct xim_inst_t *xim_callback_data;
 302 #endif
 303
 304   /* If non-null, a cache of the colors in the color map.  Don't
 305      use this directly, call x_color_cells instead.  */
 306   XColor *color_cells;
 307   int ncolor_cells;
 308
 309   /* Bits and shifts to use to compose pixel values on TrueColor visuals.  */
 310   int red_bits, blue_bits, green_bits;
 311   int red_offset, blue_offset, green_offset;
 312
 313   /* The type of window manager we have.  If we move FRAME_OUTER_WINDOW
 314      to x/y 0/0, some window managers (type A) puts the window manager
 315      decorations outside the screen and FRAME_OUTER_WINDOW exactly at 0/0.
 316      Other window managers (type B) puts the window including decorations
 317      at 0/0, so FRAME_OUTER_WINDOW is a bit below 0/0.
 318      Record the type of WM in use so we can compensate for type A WMs.  */
 319   enum
 320     {
 321       X_WMTYPE_UNKNOWN,
 322       X_WMTYPE_A,
 323       X_WMTYPE_B
 324     } wm_type;
 325
 326
 327   /* Atoms that are drag and drop atoms */
 328   Atom *x_dnd_atoms;
 329   ptrdiff_t x_dnd_atoms_size;
 330   ptrdiff_t x_dnd_atoms_length;
 331
 332   /* Extended window manager hints, Atoms supported by the window manager and
 333      atoms for settig the window type.  */
 334   Atom Xatom_net_supported, Xatom_net_supporting_wm_check;
 335   Atom *net_supported_atoms;
 336   int nr_net_supported_atoms;
 337   Window net_supported_window;
 338   Atom Xatom_net_window_type, Xatom_net_window_type_tooltip;
 339   Atom Xatom_net_active_window;
 340
 341   /* Atoms dealing with EWMH (i.e. _NET_...) */
 342   Atom Xatom_net_wm_state, Xatom_net_wm_state_fullscreen,
 343     Xatom_net_wm_state_maximized_horz, Xatom_net_wm_state_maximized_vert,
 344     Xatom_net_wm_state_sticky, Xatom_net_wm_state_hidden,
 345     Xatom_net_frame_extents;
 346
 347   /* XSettings atoms and windows.  */
 348   Atom Xatom_xsettings_sel, Xatom_xsettings_prop, Xatom_xsettings_mgr;
 349   Window xsettings_window;
 350
 351   /* Frame name and icon name */
 352   Atom Xatom_net_wm_name, Xatom_net_wm_icon_name;
 353   /* Frame opacity */
 354   Atom Xatom_net_wm_window_opacity;
 355
 356   /* SM */
 357   Atom Xatom_SM_CLIENT_ID;
 358 };
 359
 360 #ifdef HAVE_X_I18N
 361 /* Whether or not to use XIM if we have it.  */
 362 extern int use_xim;
 363 #endif
 364
 365 /* This checks to make sure we have a display.  */
 366
 367 extern void check_x (void);
 368
 369 extern struct frame *x_window_to_frame (struct x_display_info *, int);
 370
 371 extern struct frame *x_any_window_to_frame (struct x_display_info *, int);
 372 extern struct frame *x_menubar_window_to_frame (struct x_display_info *,
 373                                                 XEvent *);
 374
 375 extern struct frame *x_top_window_to_frame (struct x_display_info *, int);
 376
 377 #if ! defined (USE_X_TOOLKIT) && ! defined (USE_GTK)
 378 #define x_any_window_to_frame x_window_to_frame
 379 #define x_top_window_to_frame x_window_to_frame
 380 #endif
 381
 382 /* This is a chain of structures for all the X displays currently in use.  */
 383 extern struct x_display_info *x_display_list;
 384
 385 /* This is a list of cons cells, each of the form (NAME . FONT-LIST-CACHE),
 386    one for each element of x_display_list and in the same order.
 387    NAME is the name of the frame.
 388    FONT-LIST-CACHE records previous values returned by x-list-fonts.  */
 389 extern Lisp_Object x_display_name_list;
 390
 391 extern struct x_display_info *x_display_info_for_display (Display *);
 392 extern void x_set_frame_alpha (struct frame *);
 393
 394 extern struct x_display_info *x_term_init (Lisp_Object, char *, char *);
 395 extern int x_display_ok  (const char *);
 396
 397 extern void select_visual (struct x_display_info *);
 398
 399 \f
 400 struct font;
 401
 402 /* Each X frame object points to its own struct x_output object
 403    in the output_data.x field.  The x_output structure contains
 404    the information that is specific to X windows.  */
 405
 406 struct x_output
 407 {
 408   /* Height of menu bar widget, in pixels.
 409      Zero if not using the X toolkit.
 410      When using the toolkit, this value is not meaningful
 411      if the menubar is turned off.  */
 412   int menubar_height;
 413
 414   /* Height of tool bar widget, in pixels.  top_height is used if tool bar
 415      at top, bottom_height if tool bar is at the bottom.
 416      Zero if not using an external tool bar or if tool bar is vertical.  */
 417   int toolbar_top_height, toolbar_bottom_height;
 418
 419   /* Width of tool bar widget, in pixels.  left_width is used if tool bar
 420      at left, right_width if tool bar is at the right.
 421      Zero if not using an external tool bar or if tool bar is horizontal.  */
 422   int toolbar_left_width, toolbar_right_width;
 423
 424   /* The tiled border used when the mouse is out of the frame.  */
 425   Pixmap border_tile;
 426
 427   /* Here are the Graphics Contexts for the default font.  */
 428   GC normal_gc;                         /* Normal video */
 429   GC reverse_gc;                        /* Reverse video */
 430   GC cursor_gc;                         /* cursor drawing */
 431
 432   /* The X window used for this frame.
 433      May be zero while the frame object is being created
 434      and the X window has not yet been created.  */
 435   Window window_desc;
 436
 437   /* The X window used for the bitmap icon;
 438      or 0 if we don't have a bitmap icon.  */
 439   Window icon_desc;
 440
 441   /* The X window that is the parent of this X window.
 442      Usually this is a window that was made by the window manager,
 443      but it can be the root window, and it can be explicitly specified
 444      (see the explicit_parent field, below).  */
 445   Window parent_desc;
 446
 447 #ifdef USE_X_TOOLKIT
 448   /* The widget of this screen.  This is the window of a "shell" widget.  */
 449   Widget widget;
 450   /* The XmPanedWindows...  */
 451   Widget column_widget;
 452   /* The widget of the edit portion of this screen; the window in
 453      "window_desc" is inside of this.  */
 454   Widget edit_widget;
 455
 456   Widget menubar_widget;
 457 #endif
 458
 459 #ifdef USE_GTK
 460   /* The widget of this screen.  This is the window of a top widget.  */
 461   GtkWidget *widget;
 462   /* The widget of the edit portion of this screen; the window in
 463      "window_desc" is inside of this.  */
 464   GtkWidget *edit_widget;
 465   /* The widget used for laying out widgets vertically.  */
 466   GtkWidget *vbox_widget;
 467   /* The widget used for laying out widgets horizontally.  */
 468   GtkWidget *hbox_widget;
 469   /* The menubar in this frame.  */
 470   GtkWidget *menubar_widget;
 471   /* The tool bar in this frame  */
 472   GtkWidget *toolbar_widget;
 473   /* The handle box that makes the tool bar detachable.  */
 474   GtkWidget *handlebox_widget;
 475   /* Non-zero if the tool bar is detached.  */
 476   int toolbar_detached;
 477   /* Non-zero if tool bar is packed into the hbox widget (i.e. vertical).  */
 478   int toolbar_in_hbox;
 479
 480   /* The last size hints set.  */
 481   GdkGeometry size_hints;
 482   long hint_flags;
 483
 484 #ifdef USE_GTK_TOOLTIP
 485   GtkTooltip *ttip_widget;
 486   GtkWidget *ttip_lbl;
 487   GtkWindow *ttip_window;
 488 #endif /* USE_GTK_TOOLTIP */
 489
 490 #endif /* USE_GTK */
 491
 492   /* If >=0, a bitmap index.  The indicated bitmap is used for the
 493      icon. */
 494   ptrdiff_t icon_bitmap;
 495
 496   /* Default ASCII font of this frame.  */
 497   struct font *font;
 498
 499   /* The baseline offset of the default ASCII font.  */
 500   int baseline_offset;
 501
 502   /* If a fontset is specified for this frame instead of font, this
 503      value contains an ID of the fontset, else -1.  */
 504   int fontset;
 505
 506   /* Pixel values used for various purposes.
 507      border_pixel may be -1 meaning use a gray tile.  */
 508 #if 0 /* These are also defined in struct frame.  Use that instead.  */
 509   unsigned long background_pixel;
 510   unsigned long foreground_pixel;
 511 #endif
 512   unsigned long cursor_pixel;
 513   unsigned long border_pixel;
 514   unsigned long mouse_pixel;
 515   unsigned long cursor_foreground_pixel;
 516
 517   /* Foreground color for scroll bars.  A value of -1 means use the
 518      default (black for non-toolkit scroll bars).  */
 519   unsigned long scroll_bar_foreground_pixel;
 520
 521   /* Background color for scroll bars.  A value of -1 means use the
 522      default (background color of the frame for non-toolkit scroll
 523      bars).  */
 524   unsigned long scroll_bar_background_pixel;
 525
 526   /* Top and bottom shadow colors for 3d toolkit scrollbars.  -1 means
 527      let the scroll compute them itself.  */
 528   unsigned long scroll_bar_top_shadow_pixel;
 529   unsigned long scroll_bar_bottom_shadow_pixel;
 530
 531   /* Descriptor for the cursor in use for this window.  */
 532   Cursor text_cursor;
 533   Cursor nontext_cursor;
 534   Cursor modeline_cursor;
 535   Cursor hand_cursor;
 536   Cursor hourglass_cursor;
 537   Cursor horizontal_drag_cursor;
 538   Cursor current_cursor;
 539
 540   /* Window whose cursor is hourglass_cursor.  This window is temporarily
 541      mapped to display an hourglass cursor.  */
 542   Window hourglass_window;
 543
 544   /* Non-zero means hourglass cursor is currently displayed.  */
 545   unsigned hourglass_p : 1;
 546
 547   /* Flag to set when the X window needs to be completely repainted.  */
 548   int needs_exposure;
 549
 550   /* These are the current window manager hints.  It seems that
 551      XSetWMHints, when presented with an unset bit in the `flags'
 552      member of the hints structure, does not leave the corresponding
 553      attribute unchanged; rather, it resets that attribute to its
 554      default value.  For example, unless you set the `icon_pixmap'
 555      field and the `IconPixmapHint' bit, XSetWMHints will forget what
 556      your icon pixmap was.  This is rather troublesome, since some of
 557      the members (for example, `input' and `icon_pixmap') want to stay
 558      the same throughout the execution of Emacs.  So, we keep this
 559      structure around, just leaving values in it and adding new bits
 560      to the mask as we go.  */
 561   XWMHints wm_hints;
 562
 563   /* This is the Emacs structure for the X display this frame is on.  */
 564   struct x_display_info *display_info;
 565
 566   /* This is a button event that wants to activate the menubar.
 567      We save it here until the command loop gets to think about it.  */
 568   XEvent *saved_menu_event;
 569
 570   /* This is the widget id used for this frame's menubar in lwlib.  */
 571 #ifdef USE_X_TOOLKIT
 572   int id;
 573 #endif
 574
 575   /* Nonzero means our parent is another application's window
 576      and was explicitly specified.  */
 577   char explicit_parent;
 578
 579   /* Nonzero means tried already to make this frame visible.  */
 580   char asked_for_visible;
 581
 582   /* Nonzero if this frame was ever previously visible.  */
 583   char has_been_visible;
 584
 585 #ifdef HAVE_X_I18N
 586   /* Input context (currently, this means Compose key handler setup).  */
 587   XIC xic;
 588   XIMStyle xic_style;
 589   XFontSet xic_xfs;
 590   char *xic_base_fontname;
 591 #endif
 592
 593   /* Relief GCs, colors etc.  */
 594   struct relief
 595   {
 596     GC gc;
 597     unsigned long pixel;
 598     int allocated_p;
 599   }
 600   black_relief, white_relief;
 601
 602   /* The background for which the above relief GCs were set up.
 603      They are changed only when a different background is involved.  */
 604   unsigned long relief_background;
 605
 606   /* Xt waits for a ConfigureNotify event from the window manager in
 607      EmacsFrameSetCharSize when the shell widget is resized.  For some
 608      window managers like fvwm2 2.2.5 and KDE 2.1 this event doesn't
 609      arrive for an unknown reason and Emacs hangs in Xt.  If this is
 610      zero, tell Xt not to wait.  */
 611   int wait_for_wm;
 612
 613   /* As x_pixels_diff, but to FRAME_OUTER_WINDOW.  For some reason the
 614      two might differ by a pixel, depending on WM */
 615   int x_pixels_outer_diff;
 616
 617   /* As y_pixels_diff, but to FRAME_OUTER_WINDOW.  In the toolkit version,
 618      these may differ because this does not take into account possible
 619      menubar.  y_pixels_diff is with menubar height included */
 620   int y_pixels_outer_diff;
 621
 622   /* Keep track of focus.  May be EXPLICIT if we received a FocusIn for this
 623      frame, or IMPLICIT if we received an EnterNotify.
 624      FocusOut and LeaveNotify clears EXPLICIT/IMPLICIT. */
 625   int focus_state;
 626
 627   /* The offset we need to add to compensate for type A WMs.  */
 628   int move_offset_top;
 629   int move_offset_left;
 630
 631   /* The frame's left/top offsets before we call XMoveWindow.  See
 632      x_check_expected_move.  */
 633   int left_before_move;
 634   int top_before_move;
 635 };
 636
 637 #define No_Cursor (None)
 638
 639 enum
 640 {
 641   /* Values for focus_state, used as bit mask.
 642      EXPLICIT means we received a FocusIn for the frame and know it has
 643      the focus.  IMPLICIT means we recevied an EnterNotify and the frame
 644      may have the focus if no window manager is running.
 645      FocusOut and LeaveNotify clears EXPLICIT/IMPLICIT. */
 646   FOCUS_NONE     = 0,
 647   FOCUS_IMPLICIT = 1,
 648   FOCUS_EXPLICIT = 2
 649 };
 650
 651
 652 /* Return the X output data for frame F.  */
 653 #define FRAME_X_OUTPUT(f) ((f)->output_data.x)
 654
 655 /* Return the X window used for displaying data in frame F.  */
 656 #define FRAME_X_WINDOW(f) ((f)->output_data.x->window_desc)
 657
 658 /* Return the outermost X window associated with the frame F.  */
 659 #ifdef USE_X_TOOLKIT
 660 #define FRAME_OUTER_WINDOW(f) ((f)->output_data.x->widget ?             \
 661                                XtWindow ((f)->output_data.x->widget) :  \
 662                                FRAME_X_WINDOW (f))
 663 #else
 664 #ifdef USE_GTK
 665 /* Functions not present in older Gtk+ */
 666
 667 #ifndef HAVE_GTK_WIDGET_GET_WINDOW
 668 #define gtk_widget_get_window(w) ((w)->window)
 669 #endif
 670 #ifndef HAVE_GTK_WIDGET_GET_MAPPED
 671 #define gtk_widget_get_mapped(w) (GTK_WIDGET_MAPPED (w))
 672 #endif
 673 #ifndef HAVE_GTK_ADJUSTMENT_GET_PAGE_SIZE
 674 #define gtk_adjustment_get_page_size(w) ((w)->page_size)
 675 #define gtk_adjustment_get_upper(w) ((w)->upper)
 676 #endif
 677
 678 #ifdef HAVE_GTK3
 679 #define DEFAULT_GDK_DISPLAY() \
 680   gdk_x11_display_get_xdisplay (gdk_display_get_default ())
 681 #else
 682 #undef GDK_WINDOW_XID
 683 #define GDK_WINDOW_XID(w) GDK_WINDOW_XWINDOW (w)
 684 #define DEFAULT_GDK_DISPLAY() GDK_DISPLAY ()
 685 #define gtk_widget_get_preferred_size(a, ign, b) \
 686   gtk_widget_size_request (a, b)
 687 #endif
 688
 689 #define GTK_WIDGET_TO_X_WIN(w) \
 690   ((w) && gtk_widget_get_window (w) \
 691    ? GDK_WINDOW_XID (gtk_widget_get_window (w)) : 0)
 692
 693 #define FRAME_GTK_OUTER_WIDGET(f) ((f)->output_data.x->widget)
 694 #define FRAME_GTK_WIDGET(f) ((f)->output_data.x->edit_widget)
 695 #define FRAME_OUTER_WINDOW(f)                                   \
 696        (FRAME_GTK_OUTER_WIDGET (f) ?                            \
 697         GTK_WIDGET_TO_X_WIN (FRAME_GTK_OUTER_WIDGET (f)) :      \
 698          FRAME_X_WINDOW (f))
 699
 700 #else /* !USE_GTK */
 701 #define FRAME_OUTER_WINDOW(f) (FRAME_X_WINDOW (f))
 702 #endif /* !USE_GTK */
 703 #endif
 704
 705
 706 #define FRAME_FONT(f) ((f)->output_data.x->font)
 707 #define FRAME_FONTSET(f) ((f)->output_data.x->fontset)
 708 #define FRAME_MENUBAR_HEIGHT(f) ((f)->output_data.x->menubar_height)
 709 #define FRAME_TOOLBAR_TOP_HEIGHT(f) ((f)->output_data.x->toolbar_top_height)
 710 #define FRAME_TOOLBAR_BOTTOM_HEIGHT(f) \
 711   ((f)->output_data.x->toolbar_bottom_height)
 712 #define FRAME_TOOLBAR_HEIGHT(f) \
 713   (FRAME_TOOLBAR_TOP_HEIGHT (f) + FRAME_TOOLBAR_BOTTOM_HEIGHT (f))
 714 #define FRAME_TOOLBAR_LEFT_WIDTH(f) ((f)->output_data.x->toolbar_left_width)
 715 #define FRAME_TOOLBAR_RIGHT_WIDTH(f) ((f)->output_data.x->toolbar_right_width)
 716 #define FRAME_TOOLBAR_WIDTH(f) \
 717   (FRAME_TOOLBAR_LEFT_WIDTH (f) + FRAME_TOOLBAR_RIGHT_WIDTH (f))
 718 #define FRAME_BASELINE_OFFSET(f) ((f)->output_data.x->baseline_offset)
 719
 720 /* This gives the x_display_info structure for the display F is on.  */
 721 #define FRAME_X_DISPLAY_INFO(f) ((f)->output_data.x->display_info)
 722
 723 /* This is the `Display *' which frame F is on.  */
 724 #define FRAME_X_DISPLAY(f) (FRAME_X_DISPLAY_INFO (f)->display)
 725
 726 /* This is the `Screen *' which frame F is on.  */
 727 #define FRAME_X_SCREEN(f) (FRAME_X_DISPLAY_INFO (f)->screen)
 728 #define FRAME_X_SCREEN_NUMBER(f) XScreenNumberOfScreen (FRAME_X_SCREEN (f))
 729
 730 /* This is the Visual which frame F is on.  */
 731 #define FRAME_X_VISUAL(f) FRAME_X_DISPLAY_INFO (f)->visual
 732
 733 /* This is the Colormap which frame F uses.  */
 734 #define FRAME_X_COLORMAP(f) FRAME_X_DISPLAY_INFO (f)->cmap
 735
 736 /* This is the 'font_info *' which frame F has.  */
 737 #define FRAME_X_FONT_TABLE(f) (FRAME_X_DISPLAY_INFO (f)->font_table)
 738
 739 /* The difference in pixels between the top left corner of the
 740    Emacs window (including possible window manager decorations)
 741    and FRAME_X_WINDOW (f).  */
 742 #define FRAME_OUTER_TO_INNER_DIFF_X(f) \
 743      ((f)->output_data.x->x_pixels_outer_diff)
 744 #define FRAME_OUTER_TO_INNER_DIFF_Y(f)          \
 745      ((f)->output_data.x->y_pixels_outer_diff   \
 746       + FRAME_MENUBAR_HEIGHT (f) + FRAME_TOOLBAR_HEIGHT (f))
 747
 748
 749 #define FRAME_XIC(f) ((f)->output_data.x->xic)
 750 #define FRAME_X_XIM(f) (FRAME_X_DISPLAY_INFO (f)->xim)
 751 #define FRAME_X_XIM_STYLES(f) (FRAME_X_DISPLAY_INFO (f)->xim_styles)
 752 #define FRAME_XIC_STYLE(f) ((f)->output_data.x->xic_style)
 753 #define FRAME_XIC_FONTSET(f) ((f)->output_data.x->xic_xfs)
 754 #define FRAME_XIC_BASE_FONTNAME(f) ((f)->output_data.x->xic_base_fontname)
 755
 756 /* Value is the smallest width of any character in any font on frame F.  */
 757
 758 #define FRAME_SMALLEST_CHAR_WIDTH(F) \
 759      FRAME_X_DISPLAY_INFO(F)->smallest_char_width
 760
 761 /* Value is the smallest height of any font on frame F.  */
 762
 763 #define FRAME_SMALLEST_FONT_HEIGHT(F) \
 764      FRAME_X_DISPLAY_INFO(F)->smallest_font_height
 765 \f
 766 /* X-specific scroll bar stuff.  */
 767
 768 /* We represent scroll bars as lisp vectors.  This allows us to place
 769    references to them in windows without worrying about whether we'll
 770    end up with windows referring to dead scroll bars; the garbage
 771    collector will free it when its time comes.
 772
 773    We use struct scroll_bar as a template for accessing fields of the
 774    vector.  */
 775
 776 struct scroll_bar
 777 {
 778   /* These fields are shared by all vectors.  */
 779   EMACS_INT size_from_Lisp_Vector_struct;
 780   struct Lisp_Vector *next_from_Lisp_Vector_struct;
 781
 782   /* The window we're a scroll bar for.  */
 783   Lisp_Object window;
 784
 785   /* The next and previous in the chain of scroll bars in this frame.  */
 786   Lisp_Object next, prev;
 787
 788   /* Fields from `x_window' down will not be traced by the GC.  */
 789
 790   /* The X window representing this scroll bar.  */
 791   Window x_window;
 792
 793   /* The position and size of the scroll bar in pixels, relative to the
 794      frame.  */
 795   int top, left, width, height;
 796
 797   /* The starting and ending positions of the handle, relative to the
 798      handle area (i.e. zero is the top position, not
 799      SCROLL_BAR_TOP_BORDER).  If they're equal, that means the handle
 800      hasn't been drawn yet.
 801
 802      These are not actually the locations where the beginning and end
 803      are drawn; in order to keep handles from becoming invisible when
 804      editing large files, we establish a minimum height by always
 805      drawing handle bottoms VERTICAL_SCROLL_BAR_MIN_HANDLE pixels below
 806      where they would be normally; the bottom and top are in a
 807      different co-ordinate system.  */
 808   int start, end;
 809
 810   /* If the scroll bar handle is currently being dragged by the user,
 811      this is the number of pixels from the top of the handle to the
 812      place where the user grabbed it.  If the handle isn't currently
 813      being dragged, this is Qnil.  */
 814   Lisp_Object dragging;
 815
 816   /* 1 if the background of the fringe that is adjacent to a scroll
 817      bar is extended to the gap between the fringe and the bar.  */
 818   unsigned int fringe_extended_p : 1;
 819 };
 820
 821 /* The number of elements a vector holding a struct scroll_bar needs.  */
 822 #define SCROLL_BAR_VEC_SIZE                                     \
 823   ((sizeof (struct scroll_bar)                                  \
 824     - sizeof (EMACS_INT) - sizeof (struct Lisp_Vector *))       \
 825    / sizeof (Lisp_Object))
 826
 827 /* Turning a lisp vector value into a pointer to a struct scroll_bar.  */
 828 #define XSCROLL_BAR(vec) ((struct scroll_bar *) XVECTOR (vec))
 829
 830
 831 /* Extract the X widget of the scroll bar from a struct scroll_bar.
 832    XtWindowToWidget should be fast enough since Xt uses a hash table
 833    to map windows to widgets.  */
 834
 835 #define SCROLL_BAR_X_WIDGET(dpy, ptr) \
 836   XtWindowToWidget (dpy, ptr->x_window)
 837
 838 /* Store a widget id in a struct scroll_bar.  */
 839
 840 #define SET_SCROLL_BAR_X_WIDGET(ptr, w)         \
 841   do {                                          \
 842     Window window = XtWindow (w);               \
 843     ptr->x_window = window;                     \
 844 } while (0)
 845
 846
 847 /* Return the inside width of a vertical scroll bar, given the outside
 848    width.  */
 849 #define VERTICAL_SCROLL_BAR_INSIDE_WIDTH(f, width) \
 850   ((width) \
 851    - VERTICAL_SCROLL_BAR_LEFT_BORDER \
 852    - VERTICAL_SCROLL_BAR_RIGHT_BORDER \
 853    - VERTICAL_SCROLL_BAR_WIDTH_TRIM * 2)
 854
 855 /* Return the length of the rectangle within which the top of the
 856    handle must stay.  This isn't equivalent to the inside height,
 857    because the scroll bar handle has a minimum height.
 858
 859    This is the real range of motion for the scroll bar, so when we're
 860    scaling buffer positions to scroll bar positions, we use this, not
 861    VERTICAL_SCROLL_BAR_INSIDE_HEIGHT.  */
 862 #define VERTICAL_SCROLL_BAR_TOP_RANGE(f, height) \
 863   (VERTICAL_SCROLL_BAR_INSIDE_HEIGHT (f, height) - VERTICAL_SCROLL_BAR_MIN_HANDLE)
 864
 865 /* Return the inside height of vertical scroll bar, given the outside
 866    height.  See VERTICAL_SCROLL_BAR_TOP_RANGE too.  */
 867 #define VERTICAL_SCROLL_BAR_INSIDE_HEIGHT(f, height) \
 868   ((height) - VERTICAL_SCROLL_BAR_TOP_BORDER - VERTICAL_SCROLL_BAR_BOTTOM_BORDER)
 869
 870
 871 /* Border widths for scroll bars.
 872
 873    Scroll bar windows don't have any X borders; their border width is
 874    set to zero, and we redraw borders ourselves.  This makes the code
 875    a bit cleaner, since we don't have to convert between outside width
 876    (used when relating to the rest of the screen) and inside width
 877    (used when sizing and drawing the scroll bar window itself).
 878
 879    The handle moves up and down/back and forth in a rectangle inset
 880    from the edges of the scroll bar.  These are widths by which we
 881    inset the handle boundaries from the scroll bar edges.  */
 882 #define VERTICAL_SCROLL_BAR_LEFT_BORDER (2)
 883 #define VERTICAL_SCROLL_BAR_RIGHT_BORDER (2)
 884 #define VERTICAL_SCROLL_BAR_TOP_BORDER (2)
 885 #define VERTICAL_SCROLL_BAR_BOTTOM_BORDER (2)
 886
 887 /* Minimum lengths for scroll bar handles, in pixels.  */
 888 #define VERTICAL_SCROLL_BAR_MIN_HANDLE (5)
 889
 890 /* Trimming off a few pixels from each side prevents
 891    text from glomming up against the scroll bar */
 892 #define VERTICAL_SCROLL_BAR_WIDTH_TRIM (0)
 893
 894 \f
 895 /* If a struct input_event has a kind which is SELECTION_REQUEST_EVENT
 896    or SELECTION_CLEAR_EVENT, then its contents are really described
 897    by this structure.  */
 898
 899 /* For an event of kind SELECTION_REQUEST_EVENT,
 900    this structure really describes the contents.
 901    **Don't make this struct longer!**
 902    If it overlaps the frame_or_window field of struct input_event,
 903    that will cause GC to crash.  */
 904 struct selection_input_event
 905 {
 906   int kind;
 907   Display *display;
 908   /* We spell it with an "o" here because X does.  */
 909   Window requestor;
 910   Atom selection, target, property;
 911   Time time;
 912 };
 913
 914 #define SELECTION_EVENT_DISPLAY(eventp) \
 915   (((struct selection_input_event *) (eventp))->display)
 916 /* We spell it with an "o" here because X does.  */
 917 #define SELECTION_EVENT_REQUESTOR(eventp)       \
 918   (((struct selection_input_event *) (eventp))->requestor)
 919 #define SELECTION_EVENT_SELECTION(eventp)       \
 920   (((struct selection_input_event *) (eventp))->selection)
 921 #define SELECTION_EVENT_TARGET(eventp)  \
 922   (((struct selection_input_event *) (eventp))->target)
 923 #define SELECTION_EVENT_PROPERTY(eventp)        \
 924   (((struct selection_input_event *) (eventp))->property)
 925 #define SELECTION_EVENT_TIME(eventp)    \
 926   (((struct selection_input_event *) (eventp))->time)
 927
 928 \f
 929 struct window;
 930 struct glyph_matrix;
 931 struct frame;
 932 struct input_event;
 933 struct face;
 934 struct image;
 935
 936 /* From xselect.c.  */
 937
 938 void x_handle_selection_notify (XSelectionEvent *);
 939 void x_handle_property_notify (XPropertyEvent *);
 940
 941 /* From xfns.c.  */
 942
 943 struct frame *check_x_frame (Lisp_Object);
 944 EXFUN (Fx_display_grayscale_p, 1);
 945 extern void x_free_gcs (struct frame *);
 946 extern int gray_bitmap_width, gray_bitmap_height;
 947 extern char *gray_bitmap_bits;
 948
 949 /* From xrdb.c.  */
 950
 951 XrmDatabase x_load_resources (Display *, const char *, const char *,
 952                               const char *);
 953
 954 /* Defined in xterm.c */
 955
 956 extern int x_text_icon (struct frame *, const char *);
 957 extern int x_bitmap_icon (struct frame *, Lisp_Object);
 958 extern void x_catch_errors (Display *);
 959 extern void x_check_errors (Display *, const char *)
 960   ATTRIBUTE_FORMAT_PRINTF (2, 0);
 961 extern int x_had_errors_p (Display *);
 962 extern void x_uncatch_errors (void);
 963 extern void x_clear_errors (Display *);
 964 extern void x_set_window_size (struct frame *, int, int, int);
 965 extern void x_set_mouse_position (struct frame *, int, int);
 966 extern void x_set_mouse_pixel_position (struct frame *, int, int);
 967 extern void x_ewmh_activate_frame (struct frame *);
 968 extern void x_make_frame_visible (struct frame *);
 969 extern void x_make_frame_invisible (struct frame *);
 970 extern void x_iconify_frame (struct frame *);
 971 extern void x_free_frame_resources (struct frame *);
 972 extern void x_wm_set_size_hint (struct frame *, long, int);
 973 extern void x_delete_terminal (struct terminal *terminal);
 974 extern unsigned long x_copy_color (struct frame *, unsigned long);
 975 #ifdef USE_X_TOOLKIT
 976 extern XtAppContext Xt_app_con;
 977 extern void x_activate_timeout_atimer (void);
 978 #endif
 979 #ifdef USE_LUCID
 980 extern int x_alloc_lighter_color_for_widget (Widget, Display *, Colormap,
 981                                              unsigned long *,
 982                                              double, int);
 983 #endif
 984 extern int x_alloc_nearest_color (struct frame *, Colormap, XColor *);
 985 extern void x_query_colors (struct frame *f, XColor *, int);
 986 extern void x_query_color (struct frame *f, XColor *);
 987 extern void x_clear_area (Display *, Window, int, int, int, int, int);
 988 #if defined HAVE_MENUS && !defined USE_X_TOOLKIT && !defined USE_GTK
 989 extern void x_mouse_leave (struct x_display_info *);
 990 #endif
 991
 992 #ifdef USE_X_TOOLKIT
 993 extern int x_dispatch_event (XEvent *, Display *);
 994 #endif
 995 extern EMACS_INT x_x_to_emacs_modifiers (struct x_display_info *, int);
 996 extern int x_display_pixel_height (struct x_display_info *);
 997 extern int x_display_pixel_width (struct x_display_info *);
 998
 999 extern void x_set_sticky (struct frame *, Lisp_Object, Lisp_Object);
1000 extern void x_wait_for_event (struct frame *, int);
1001
1002 /* Defined in xselect.c */
1003
1004 extern void x_handle_property_notify (XPropertyEvent *);
1005 extern void x_handle_selection_notify (XSelectionEvent *);
1006 extern void x_handle_selection_event (struct input_event *);
1007 extern void x_clear_frame_selections (struct frame *);
1008
1009 extern void x_send_client_event (Lisp_Object display,
1010                                  Lisp_Object dest,
1011                                  Lisp_Object from,
1012                                  Atom message_type,
1013                                  Lisp_Object format,
1014                                  Lisp_Object values);
1015
1016 extern int x_handle_dnd_message (struct frame *,
1017                                  XClientMessageEvent *,
1018                                  struct x_display_info *,
1019                                  struct input_event *bufp);
1020 extern int x_check_property_data (Lisp_Object);
1021 extern void x_fill_property_data (Display *,
1022                                   Lisp_Object,
1023                                   void *,
1024                                   int);
1025 extern Lisp_Object x_property_data_to_lisp (struct frame *,
1026                                             const unsigned char *,
1027                                             Atom,
1028                                             int,
1029                                             unsigned long);
1030 extern void x_clipboard_manager_save_frame (Lisp_Object);
1031 extern void x_clipboard_manager_save_all (void);
1032
1033 /* Defined in xfns.c */
1034
1035 extern struct x_display_info * check_x_display_info (Lisp_Object);
1036 extern Lisp_Object x_get_focus_frame (struct frame *);
1037
1038 #ifdef USE_GTK
1039 extern int xg_set_icon (struct frame *, Lisp_Object);
1040 extern int xg_set_icon_from_xpm_data (struct frame *, const char**);
1041 #endif /* USE_GTK */
1042
1043 extern void x_real_positions (struct frame *, int *, int *);
1044 extern void x_set_menu_bar_lines (struct frame *, Lisp_Object, Lisp_Object);
1045 extern void x_implicitly_set_name (struct frame *, Lisp_Object, Lisp_Object);
1046 extern void xic_free_xfontset (struct frame *);
1047 extern void create_frame_xic (struct frame *);
1048 extern void destroy_frame_xic (struct frame *);
1049 extern void xic_set_preeditarea (struct window *, int, int);
1050 extern void xic_set_statusarea (struct frame *);
1051 extern void xic_set_xfontset (struct frame *, const char *);
1052 extern int x_pixel_width (struct frame *);
1053 extern int x_pixel_height (struct frame *);
1054 extern int x_char_width (struct frame *);
1055 extern int x_char_height (struct frame *);
1056 extern void x_sync (struct frame *);
1057 extern int x_defined_color (struct frame *, const char *, XColor *, int);
1058 #ifdef HAVE_X_I18N
1059 extern void free_frame_xic (struct frame *);
1060 # if defined HAVE_X_WINDOWS && defined USE_X_TOOLKIT
1061 extern char * xic_create_fontsetname (const char *base_fontname, int motif);
1062 # endif
1063 #endif
1064 extern void x_set_tool_bar_lines (struct frame *, Lisp_Object, Lisp_Object);
1065
1066 /* Defined in xfaces.c */
1067
1068 #ifdef USE_X_TOOLKIT
1069 extern void x_free_dpy_colors (Display *, Screen *, Colormap,
1070                                unsigned long *, int);
1071 #endif /* USE_X_TOOLKIT */
1072
1073 /* Defined in xmenu.c */
1074
1075 #if defined USE_GTK || defined USE_MOTIF
1076 extern void x_menu_set_in_use (int);
1077 #endif
1078 #ifdef USE_MOTIF
1079 extern void x_menu_wait_for_event (void *data);
1080 #endif
1081 extern void x_activate_menubar (struct frame *);
1082 extern int popup_activated (void);
1083 extern void initialize_frame_menubar (struct frame *);
1084 extern void free_frame_menubar (struct frame *);
1085
1086 /* Defined in widget.c */
1087
1088 #ifdef USE_X_TOOLKIT
1089 extern void widget_store_internal_border (Widget);
1090 #endif
1091
1092 /* Defined in xsmfns.c */
1093 #ifdef HAVE_X_SM
1094 extern void x_session_initialize (struct x_display_info *dpyinfo);
1095 extern int x_session_have_connection (void);
1096 extern void x_session_close (void);
1097 #endif
1098
1099 /* Defined in xterm.c */
1100
1101 extern Lisp_Object Qx_gtk_map_stock;
1102
1103 /* Is the frame embedded into another application? */
1104
1105 #define FRAME_X_EMBEDDED_P(f) (FRAME_X_OUTPUT(f)->explicit_parent != 0)
1106
1107
1108 #define FONT_TYPE_FOR_UNIBYTE(font, ch) 0
1109 #define FONT_TYPE_FOR_MULTIBYTE(font, ch) 0
1110
1111 #define STORE_XCHAR2B(chp, b1, b2) \
1112   ((chp)->byte1 = (b1), (chp)->byte2 = (b2))
1113
1114 #define XCHAR2B_BYTE1(chp) \
1115   ((chp)->byte1)
1116
1117 #define XCHAR2B_BYTE2(chp) \
1118   ((chp)->byte2)
1119
1120
1121 #define STORE_NATIVE_RECT(nr,rx,ry,rwidth,rheight)      \
1122   ((nr).x = (rx),                                       \
1123    (nr).y = (ry),                                       \
1124    (nr).width = (rwidth),                               \
1125    (nr).height = (rheight))