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/* Definitions and headers for communication with X protocol.
Copyright (C) 1989, 1993, 1994 Free Software Foundation, Inc.
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 2, 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. */
#ifdef HAVE_X11
#include <X11/Xlib.h>
#include <X11/cursorfont.h>
#include <X11/Xutil.h>
#include <X11/keysym.h>
#include <X11/Xatom.h>
#include <X11/Xresource.h>
#else
#include <X/Xlib.h>
#endif /* HAVE_X11 */
#ifdef USE_X_TOOLKIT
#include <X11/StringDefs.h>
#include <X11/IntrinsicP.h> /* CoreP.h needs this */
#include <X11/CoreP.h> /* foul, but we need this to use our own
window inside a widget instead of one
that Xt creates... */
#include <X11/StringDefs.h>
#endif
/* Define a queue for X-events. One such queue is used for mouse clicks.
Another is used for expose events. */
#define EVENT_BUFFER_SIZE 64
/* Max and Min sizes in character columns. */
#define MINWIDTH 10
#define MINHEIGHT 10
#define MAXWIDTH 300
#define MAXHEIGHT 80
#ifdef HAVE_X11
/* HAVE_X11R4 is defined if we have the features of X11R4. It should
be defined when we're using X11R5, since X11R5 has the features of
X11R4. If, in the future, we find we need more of these flags
(HAVE_X11R5, for example), code should always be written to test
the most recent flag first:
#ifdef HAVE_X11R5
...
#elif HAVE_X11R4
...
#elif HAVE_X11
...
#endif
If you ever find yourself writing a "#ifdef HAVE_FOO" clause that
looks a lot like another one, consider moving the text into a macro
whose definition is configuration-dependent, but whose usage is
universal - like the stuff in systime.h.
It turns out that we can auto-detect whether we're being compiled
with X11R3 or X11R4 by looking for the flag macros for R4 structure
members that R3 doesn't have. */
#ifdef PBaseSize
/* AIX 3.1's X is somewhere between X11R3 and X11R4. It has
PBaseSize, but not XWithdrawWindow, XSetWMName, XSetWMNormalHints,
XSetWMIconName.
AIX 3.2 is at least X11R4. */
#if (!defined AIX) || (defined AIX3_2)
#define HAVE_X11R4
#endif
#endif
#ifdef XlibSpecificationRelease
#if XlibSpecificationRelease >= 5
#define HAVE_X11R5
/* In case someone has X11R5 on AIX 3.1,
make sure HAVE_X11R4 is defined as well as HAVE_X11R5. */
#define HAVE_X11R4
#endif
#endif
#define PIX_TYPE unsigned long
#define XDISPLAY x_current_display,
#define XFlushQueue() XFlush(x_current_display)
#define BLACK_PIX_DEFAULT BlackPixel (x_current_display, \
XDefaultScreen (x_current_display))
#define WHITE_PIX_DEFAULT WhitePixel (x_current_display, \
XDefaultScreen (x_current_display))
#define DISPLAY_SCREEN_ARG x_current_display, \
XDefaultScreen (x_current_display)
#define DISPLAY_CELLS DisplayCells (x_current_display, XDefaultScreen (x_current_display))
#define ROOT_WINDOW RootWindow (x_current_display, DefaultScreen (x_current_display))
#define FONT_TYPE XFontStruct
#define Color XColor
#define XExposeRegionEvent XExposeEvent
#define Bitmap Pixmap /* In X11, Bitmaps are a kind of
Pixmap. */
#define WINDOWINFO_TYPE XWindowAttributes
#define XGetWindowInfo(w, i) XGetWindowAttributes (x_current_display, \
(w), (i))
#define XGetFont(f) XLoadQueryFont (x_current_display, (f))
#define XLoseFont(f) XFreeFont (x_current_display, (f))
#define XStuffPending() XPending (x_current_display)
#define XClear(w) XClearWindow (x_current_display, (w))
#define XWarpMousePointer(w,x,y) XWarpPointer (x_current_display, None, w, \
0,0,0,0, x, y)
#define XHandleError XSetErrorHandler
#define XHandleIOError XSetIOErrorHandler
#define XChangeWindowSize(w,x,y) XResizeWindow(x_current_display,w,x,y)
#define FONT_WIDTH(f) ((f)->max_bounds.width)
#define FONT_HEIGHT(f) ((f)->ascent + (f)->descent)
#define FONT_BASE(f) ((f)->ascent)
/* The mask of events that text windows always want to receive. This
does not include mouse movement events. It is used when the window
is created (in x_window) and when we ask/unask for mouse movement
events (in XTmouse_tracking_enable).
We do include ButtonReleases in this set because elisp isn't always
fast enough to catch them when it wants them, and they're rare
enough that they don't use much processor time. */
#define STANDARD_EVENT_SET \
(KeyPressMask \
| ExposureMask \
| ButtonPressMask \
| ButtonReleaseMask \
| PointerMotionMask \
| PointerMotionHintMask \
| StructureNotifyMask \
| FocusChangeMask \
| LeaveWindowMask \
| EnterWindowMask \
| VisibilityChangeMask)
#else /* X10 */
#define ConnectionNumber(dpy) dpyno()
#define PIX_TYPE int
#define XDISPLAY
#define XFlushQueue() XFlush()
#define BLACK_PIX_DEFAULT BlackPixel
#define WHITE_PIX_DEFAULT WhitePixel
#define DISPLAY_SCREEN_ARG
#define DISPLAY_CELLS DisplayCells ()
#define ROOT_WINDOW RootWindow
#define XFree free
#define FONT_TYPE FontInfo
#define WINDOWINFO_TYPE WindowInfo
#define XGetWindowInfo(w, i) XQueryWindow ((w), (i))
#define XGetFont(f) XOpenFont ((f))
#define XLoseFont(f) XCloseFont ((f))
#define XStuffPending() XPending ()
#define XWarpMousePointer(w,x,y) XWarpMouse (w,x,y)
#define XHandleError XErrorHandler
#define XHandleIOError XIOErrorHandler
#define FONT_WIDTH(f) ((f)->width)
#define FONT_HEIGHT(f) ((f)->height)
#define FONT_BASE(f) ((f)->base)
#define XChangeWindowSize(w,x,y) XChangeWindow(w,x,y)
#endif /* X10 */
#define NORMAL_FACE ((struct x_face *) 0)
#define FACE_HAS_GC(f) ((f)->gc)
#define FACE_GC(f) ((f)->gc)
#define FACE_FOREGROUND(f) ((f)->foreground)
#define FACE_BACKGROUND(f) ((f)->background)
#define FACE_FONT(f) ((f)->font)
#define FACE_STIPPLE(f) ((f)->stipple)
#define FACE_UNDERLINE_P(f) ((f)->underline)
struct event_queue
{
int rindex; /* Index at which to fetch next. */
int windex; /* Index at which to store next. */
XEvent xrep[EVENT_BUFFER_SIZE];
};
/* Queue for mouse clicks. */
extern struct event_queue x_mouse_queue;
/* This is the X connection that we are using. */
extern Display *x_current_display;
/* This checks to make sure we have a display. */
extern void check_x ();
extern struct frame *x_window_to_frame ();
#ifdef USE_X_TOOLKIT
extern struct frame *x_any_window_to_frame ();
extern struct frame *x_top_window_to_frame ();
#endif
/* The frame (if any) which has the X window that has keyboard focus.
Zero if none. This is examined by Ffocus_frame in xfns.c */
extern struct frame *x_focus_frame;
#ifdef HAVE_X11
/* Variables associated with the X display screen this emacs is using. */
/* How many screens this X display has. */
extern int x_screen_count;
/* The vendor supporting this X server. */
extern Lisp_Object Vx_vendor;
/* The vendor's release number for this X server. */
extern int x_release;
/* Height of this X screen in pixels. */
extern int x_screen_height;
/* Height of this X screen in millimeters. */
extern int x_screen_height_mm;
/* Width of this X screen in pixels. */
extern int x_screen_width;
/* Width of this X screen in millimeters. */
extern int x_screen_width_mm;
/* Does this X screen do backing store? */
extern Lisp_Object Vx_backing_store;
/* Does this X screen do save-unders? */
extern int x_save_under;
/* Number of planes for this screen. */
extern int x_screen_planes;
/* X Visual type of this screen. */
extern Lisp_Object Vx_screen_visual;
/* Mask of which mouse buttons are currently held down. */
extern unsigned int x_mouse_grabbed;
#endif /* HAVE_X11 */
enum text_cursor_kinds {
filled_box_cursor, hollow_box_cursor, bar_cursor
};
/* Each X frame object points to its own struct x_display object
in the display.x field. The x_display structure contains all
the information that is specific to X windows. */
struct x_display
{
/* Position of the X window (x and y offsets in root window). */
int left_pos;
int top_pos;
/* Border width of the X window as known by the X window system. */
int border_width;
/* Size of the X window in pixels. */
int pixel_height, pixel_width;
/* Height of a line, in pixels. */
int line_height;
#ifdef HAVE_X11
/* The tiled border used when the mouse is out of the frame. */
Pixmap border_tile;
/* Here are the Graphics Contexts for the default font. */
GC normal_gc; /* Normal video */
GC reverse_gc; /* Reverse video */
GC cursor_gc; /* cursor drawing */
#endif /* HAVE_X11 */
/* Width of the internal border. This is a line of background color
just inside the window's border. When the frame is selected,
a highlighting is displayed inside the internal border. */
int internal_border_width;
/* The X window used for this frame.
May be zero while the frame object is being created
and the X window has not yet been created. */
Window window_desc;
/* The X window used for the bitmap icon;
or 0 if we don't have a bitmap icon. */
Window icon_desc;
/* The X window that is the parent of this X window.
Usually but not always RootWindow. */
Window parent_desc;
#ifdef USE_X_TOOLKIT
/* The widget of this screen. This is the window of a "shell" widget. */
Widget widget;
/* The XmPanedWindows... */
Widget column_widget;
/* The widget of the edit portion of this screen; the window in
"window_desc" is inside of this. */
Widget edit_widget;
Widget menubar_widget;
#endif
/* 1 for bitmap icon, 0 for text icon. */
int icon_bitmap_flag;
FONT_TYPE *font;
/* Pixel values used for various purposes.
border_pixel may be -1 meaning use a gray tile. */
PIX_TYPE background_pixel;
PIX_TYPE foreground_pixel;
PIX_TYPE cursor_pixel;
PIX_TYPE border_pixel;
PIX_TYPE mouse_pixel;
PIX_TYPE cursor_foreground_pixel;
/* Descriptor for the cursor in use for this window. */
#ifdef HAVE_X11
Cursor text_cursor;
Cursor nontext_cursor;
Cursor modeline_cursor;
Cursor cross_cursor;
#else
Cursor cursor;
#endif
/* The name that was associated with the icon, the last time
it was refreshed. Usually the same as the name of the
buffer in the currently selected window in the frame */
char *icon_label;
/* Flag to set when the X window needs to be completely repainted. */
int needs_exposure;
/* What kind of text cursor is drawn in this window right now?
(If there is no cursor (phys_cursor_x < 0), then this means nothing.) */
enum text_cursor_kinds current_cursor;
/* What kind of text cursor should we draw in the future?
This should always be filled_box_cursor or bar_cursor. */
enum text_cursor_kinds desired_cursor;
/* These are the current window manager hints. It seems that
XSetWMHints, when presented with an unset bit in the `flags'
member of the hints structure, does not leave the corresponding
attribute unchanged; rather, it resets that attribute to its
default value. For example, unless you set the `icon_pixmap'
field and the `IconPixmapHint' bit, XSetWMHints will forget what
your icon pixmap was. This is rather troublesome, since some of
the members (for example, `input' and `icon_pixmap') want to stay
the same throughout the execution of Emacs. So, we keep this
structure around, just leaving values in it and adding new bits
to the mask as we go. */
XWMHints wm_hints;
/* The size of the extra width currently allotted for vertical
scroll bars, in pixels. */
int vertical_scroll_bar_extra;
/* Table of parameter faces for this frame. Any X resources (pixel
values, fonts) referred to here have been allocated explicitly
for this face, and should be freed if we change the face. */
struct x_face **param_faces;
int n_param_faces;
/* Table of computed faces for this frame. These are the faces
whose indexes go into the upper bits of a glyph, computed by
combining the parameter faces specified by overlays, text
properties, and what have you. The X resources mentioned here
are all shared with parameter faces. */
struct x_face **computed_faces;
int n_computed_faces; /* How many are valid */
int size_computed_faces; /* How many are allocated */
/* This is the gravity value for the specified window position. */
int win_gravity;
/* The geometry flags for this window. */
int size_hint_flags;
};
/* Get at the computed faces of an X window frame. */
#define FRAME_PARAM_FACES(f) ((f)->display.x->param_faces)
#define FRAME_N_PARAM_FACES(f) ((f)->display.x->n_param_faces)
#define FRAME_DEFAULT_PARAM_FACE(f) (FRAME_PARAM_FACES (f)[0])
#define FRAME_MODE_LINE_PARAM_FACE(f) (FRAME_PARAM_FACES (f)[1])
#define FRAME_COMPUTED_FACES(f) ((f)->display.x->computed_faces)
#define FRAME_N_COMPUTED_FACES(f) ((f)->display.x->n_computed_faces)
#define FRAME_SIZE_COMPUTED_FACES(f) ((f)->display.x->size_computed_faces)
#define FRAME_DEFAULT_FACE(f) ((f)->display.x->computed_faces[0])
#define FRAME_MODE_LINE_FACE(f) ((f)->display.x->computed_faces[1])
/* Return the window associated with the frame F. */
#define FRAME_X_WINDOW(f) ((f)->display.x->window_desc)
/* These two really ought to be called FRAME_PIXEL_{WIDTH,HEIGHT}. */
#define PIXEL_WIDTH(f) ((f)->display.x->pixel_width)
#define PIXEL_HEIGHT(f) ((f)->display.x->pixel_height)
#define FRAME_DESIRED_CURSOR(f) ((f)->display.x->desired_cursor)
/* When X windows are used, a glyph may be a 16 bit unsigned datum.
The high order byte is the face number and is used as an index
in the face table. A face is a font plus:
1) the unhighlighted foreground color,
2) the unhighlighted background color.
For highlighting, the two colors are exchanged.
Face number 0 is unused. The low order byte of a glyph gives
the character within the font. All fonts are assumed to be
fixed width, and to have the same height and width. */
#ifdef HAVE_X11
struct x_face
{
/* If this is non-zero, it is a GC we can use without modification
to represent this face. */
GC gc;
/* If we have ever called get_cached_face on this face structure,
here is the index in face_vector of the face it returned. It
might not be valid any more, but it's a good place to start
looking; get_cached_face tries to use this to avoid searching
all of face_vector. */
int cached_index;
/* Pixel value for foreground color. */
int foreground;
/* Pixel value for background color. */
int background;
/* Font used for this face. */
XFontStruct *font;
/* Background stipple or bitmap used for this face. */
Pixmap stipple;
/* Pixmap_depth. */
unsigned int pixmap_w, pixmap_h;
/* Whether or not to underline text in this face. */
char underline;
};
#else /* X10 */
struct x_face
{
FONT_TYPE *font; /* Font info for specified font. */
int fg; /* Unhighlighted foreground. */
int bg; /* Unhighlighted background. */
};
#endif /* X10 */
#define MAX_FACES_AND_GLYPHS 256
extern struct x_face *x_face_table[];
/* X-specific scroll bar stuff. */
/* We represent scroll bars as lisp vectors. This allows us to place
references to them in windows without worrying about whether we'll
end up with windows referring to dead scroll bars; the garbage
collector will free it when its time comes.
We use struct x_scroll_bar as a template for accessing fields of the
vector. */
struct x_scroll_bar {
/* These fields are shared by all vectors. */
int size_from_Lisp_Vector_struct;
struct Lisp_Vector *next_from_Lisp_Vector_struct;
/* The window we're a scroll bar for. */
Lisp_Object window;
/* The next and previous in the chain of scroll bars in this frame. */
Lisp_Object next, prev;
/* The X window representing this scroll bar. Since this is a full
32-bit quantity, we store it split into two 32-bit values. */
Lisp_Object x_window_low, x_window_high;
/* The position and size of the scroll bar in pixels, relative to the
frame. */
Lisp_Object top, left, width, height;
/* The starting and ending positions of the handle, relative to the
handle area (i.e. zero is the top position, not
SCROLL_BAR_TOP_BORDER). If they're equal, that means the handle
hasn't been drawn yet.
These are not actually the locations where the beginning and end
are drawn; in order to keep handles from becoming invisible when
editing large files, we establish a minimum height by always
drawing handle bottoms X_VERTICAL_SCROLL_BAR_MIN_HANDLE pixels below
where they would be normally; the bottom and top are in a
different co-ordinate system. */
Lisp_Object start, end;
/* If the scroll bar handle is currently being dragged by the user,
this is the number of pixels from the top of the handle to the
place where the user grabbed it. If the handle isn't currently
being dragged, this is Qnil. */
Lisp_Object dragging;
};
/* The number of elements a vector holding a struct x_scroll_bar needs. */
#define X_SCROLL_BAR_VEC_SIZE \
((sizeof (struct x_scroll_bar) - sizeof (int) - sizeof (struct Lisp_Vector *)) \
/ sizeof (Lisp_Object))
/* Turning a lisp vector value into a pointer to a struct scroll_bar. */
#define XX_SCROLL_BAR(vec) ((struct x_scroll_bar *) XPNTR (vec))
/* Building a 32-bit C integer from two 16-bit lisp integers. */
#define X_SCROLL_BAR_PACK(low, high) (XINT (high) << 16 | XINT (low))
/* Setting two lisp integers to the low and high words of a 32-bit C int. */
#define X_SCROLL_BAR_UNPACK(low, high, int32) \
(XSET ((low), Lisp_Int, (int32) & 0xffff), \
XSET ((high), Lisp_Int, ((int32) >> 16) & 0xffff))
/* Extract the X window id of the scroll bar from a struct x_scroll_bar. */
#define X_SCROLL_BAR_X_WINDOW(ptr) \
((Window) X_SCROLL_BAR_PACK ((ptr)->x_window_low, (ptr)->x_window_high))
/* Store a window id in a struct scroll_bar. */
#define X_SET_SCROLL_BAR_X_WINDOW(ptr, id) \
(X_SCROLL_BAR_UNPACK ((ptr)->x_window_low, (ptr)->x_window_high, (int) id))
/* Return the outside pixel width for a vertical scroll bar on frame F. */
#define X_VERTICAL_SCROLL_BAR_PIXEL_WIDTH(f) (2*FONT_WIDTH ((f)->display.x->font))
/* Return the outside pixel height for a vertical scroll bar HEIGHT
rows high on frame F. */
#define X_VERTICAL_SCROLL_BAR_PIXEL_HEIGHT(f, height) \
((height) * (f)->display.x->line_height)
/* Return the inside width of a vertical scroll bar, given the outside
width. */
#define X_VERTICAL_SCROLL_BAR_INSIDE_WIDTH(width) \
((width) - X_VERTICAL_SCROLL_BAR_LEFT_BORDER - X_VERTICAL_SCROLL_BAR_RIGHT_BORDER)
/* Return the length of the rectangle within which the top of the
handle must stay. This isn't equivalent to the inside height,
because the scroll bar handle has a minimum height.
This is the real range of motion for the scroll bar, so when we're
scaling buffer positions to scroll bar positions, we use this, not
X_VERTICAL_SCROLL_BAR_INSIDE_HEIGHT. */
#define X_VERTICAL_SCROLL_BAR_TOP_RANGE(height) \
(X_VERTICAL_SCROLL_BAR_INSIDE_HEIGHT (height) - X_VERTICAL_SCROLL_BAR_MIN_HANDLE)
/* Return the inside height of vertical scroll bar, given the outside
height. See X_VERTICAL_SCROLL_BAR_TOP_RANGE too. */
#define X_VERTICAL_SCROLL_BAR_INSIDE_HEIGHT(height) \
((height) - X_VERTICAL_SCROLL_BAR_TOP_BORDER - X_VERTICAL_SCROLL_BAR_BOTTOM_BORDER)
/* Border widths for scroll bars.
Scroll bar windows don't have any X borders; their border width is
set to zero, and we redraw borders ourselves. This makes the code
a bit cleaner, since we don't have to convert between outside width
(used when relating to the rest of the screen) and inside width
(used when sizing and drawing the scroll bar window itself).
The handle moves up and down/back and forth in a rectangle inset
from the edges of the scroll bar. These are widths by which we
inset the handle boundaries from the scroll bar edges. */
#define X_VERTICAL_SCROLL_BAR_LEFT_BORDER (2)
#define X_VERTICAL_SCROLL_BAR_RIGHT_BORDER (2)
#define X_VERTICAL_SCROLL_BAR_TOP_BORDER (2)
#define X_VERTICAL_SCROLL_BAR_BOTTOM_BORDER (2)
/* Minimum lengths for scroll bar handles, in pixels. */
#define X_VERTICAL_SCROLL_BAR_MIN_HANDLE (5)
/* Manipulating pixel sizes and character sizes.
Knowledge of which factors affect the overall size of the window should
be hidden in these macros, if that's possible.
/* Return the upper/left pixel position of the character cell on frame F
at ROW/COL. */
#define CHAR_TO_PIXEL_ROW(f, row) \
((f)->display.x->internal_border_width \
+ (row) * (f)->display.x->line_height)
#define CHAR_TO_PIXEL_COL(f, col) \
((f)->display.x->internal_border_width \
+ (col) * FONT_WIDTH ((f)->display.x->font))
/* Return the pixel width/height of frame F if it has
WIDTH columns/HEIGHT rows. */
#define CHAR_TO_PIXEL_WIDTH(f, width) \
(CHAR_TO_PIXEL_COL (f, width) \
+ (f)->display.x->vertical_scroll_bar_extra \
+ (f)->display.x->internal_border_width)
#define CHAR_TO_PIXEL_HEIGHT(f, height) \
(CHAR_TO_PIXEL_ROW (f, height) \
+ (f)->display.x->internal_border_width)
/* Return the row/column (zero-based) of the character cell containing
the pixel on FRAME at ROW/COL. */
#define PIXEL_TO_CHAR_ROW(f, row) \
(((row) - (f)->display.x->internal_border_width) \
/ (f)->display.x->line_height)
#define PIXEL_TO_CHAR_COL(f, col) \
(((col) - (f)->display.x->internal_border_width) \
/ FONT_WIDTH ((f)->display.x->font))
/* How many columns/rows of text can we fit in WIDTH/HEIGHT pixels on
frame F? */
#define PIXEL_TO_CHAR_WIDTH(f, width) \
(PIXEL_TO_CHAR_COL (f, ((width) \
- (f)->display.x->internal_border_width \
- (f)->display.x->vertical_scroll_bar_extra)))
#define PIXEL_TO_CHAR_HEIGHT(f, height) \
(PIXEL_TO_CHAR_ROW (f, ((height) \
- (f)->display.x->internal_border_width)))
/* If a struct input_event has a kind which is selection_request_event
or selection_clear_event, then its contents are really described
by this structure. */
/* For an event of kind selection_request_event,
this structure really describes the contents. */
struct selection_input_event
{
int kind;
Display *display;
Window requestor;
Atom selection, target, property;
Time time;
};
#define SELECTION_EVENT_DISPLAY(eventp) \
(((struct selection_input_event *) (eventp))->display)
#define SELECTION_EVENT_REQUESTOR(eventp) \
(((struct selection_input_event *) (eventp))->requestor)
#define SELECTION_EVENT_SELECTION(eventp) \
(((struct selection_input_event *) (eventp))->selection)
#define SELECTION_EVENT_TARGET(eventp) \
(((struct selection_input_event *) (eventp))->target)
#define SELECTION_EVENT_PROPERTY(eventp) \
(((struct selection_input_event *) (eventp))->property)
#define SELECTION_EVENT_TIME(eventp) \
(((struct selection_input_event *) (eventp))->time)
/* Interface to the face code functions. */
/* Create the first two computed faces for a frame -- the ones that
have GC's. */
extern void x_init_frame_faces (/* FRAME_PTR */);
/* Free the resources for the faces associated with a frame. */
extern void x_free_frame_faces (/* FRAME_PTR */);
/* Given a computed face, find or make an equivalent display face
in face_vector, and return a pointer to it. */
extern struct x_face *x_intern_face (/* FRAME_PTR, struct x_face * */);
/* Given a frame and a face name, return the face's ID number, or
zero if it isn't a recognized face name. */
extern int x_face_name_id_number (/* FRAME_PTR, Lisp_Object */);
/* Return non-zero if FONT1 and FONT2 have the same size bounding box.
We assume that they're both character-cell fonts. */
extern int x_same_size_fonts (/* XFontStruct *, XFontStruct * */);
/* Recompute the GC's for the default and modeline faces.
We call this after changing frame parameters on which those GC's
depend. */
extern void x_recompute_basic_faces (/* FRAME_PTR */);
/* Return the face ID associated with a buffer position POS. Store
into *ENDPTR the next position at which a different face is
needed. This does not take account of glyphs that specify their
own face codes. F is the frame in use for display, and W is a
window displaying the current buffer.
REGION_BEG, REGION_END delimit the region, so it can be highlighted. */
extern int x_compute_char_face (/* FRAME_PTR frame,
struct window *w,
int pos,
int region_beg, int region_end,
int *endptr */);
/* Return the face ID to use to display a special glyph which selects
FACE_CODE as the face ID, assuming that ordinarily the face would
be BASIC_FACE. F is the frame. */
extern int x_compute_glyph_face (/* FRAME_PTR, int */);
These are the contents of the former NiCE NeXT User Group NeXTSTEP/OpenStep software archive, currently hosted by Netfuture.ch.