/* Interface definitions for display code.
- Copyright (C) 1985 Free Software Foundation, Inc.
+ Copyright (C) 1985, 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 1, or (at your option)
+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,
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. */
+the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+Boston, MA 02111-1307, USA. */
-/* Nonzero means don't assume anything about current
- contents of actual terminal screen */
-extern int screen_garbaged;
+#ifndef _DISPEXTERN_H_
+#define _DISPEXTERN_H_
/* Nonzero means last display completed and cursor is really at
cursX, cursY. Zero means it was preempted. */
extern int display_completed;
#ifdef HAVE_X_WINDOWS
-struct run
-{
- int begin_run;
- int len;
- int face_code; /* Also handles underlining. */
-};
+#include <X11/Xlib.h>
#endif
-/* This structure is used for the actual display of text on a screen.
+#ifdef MSDOS
+#include "msdos.h"
+#endif
+
+#ifdef HAVE_NTGUI
+#include "w32gui.h"
+#endif
+
+#ifdef HAVE_FACES
+struct face
+ {
+ /* If this is non-zero, it is a GC we can use without modification
+ to represent this face. Used only for ASCII characters. */
+ GC gc;
+
+ /* GC used for non-ASCII characters. */
+ GC non_ascii_gc;
+
+ /* Pixel value for foreground color. */
+ EMACS_UINT foreground;
+
+ /* Pixel value for background color. */
+ EMACS_UINT background;
+
+ /* Font used for this face. If any fontset is set for this face,
+ this points to a `font' slot of the struct `font_info' for an
+ ASCII font of the fontset. In that case, we should not call
+ XFreeFont on it because the font may still be used somewhere
+ else. */
+ XFontStruct *font;
+
+ /* Fontset ID if any fontset is set for this face, else -1. */
+ int fontset;
+
+ /* 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;
+ };
+
+/* Let's stop using this and get rid of it. */
+typedef struct face *FACE;
+
+#define NORMAL_FACE ((struct face *) 0)
+
+#define FACE_HAS_GC(f) ((f)->gc)
+#define FACE_GC(f) ((f)->gc)
+#define FACE_NON_ASCII_GC(f) ((f)->non_ascii_gc)
+#define FACE_FOREGROUND(f) ((f)->foreground)
+#define FACE_BACKGROUND(f) ((f)->background)
+#define FACE_FONT(f) ((f)->font)
+#define FACE_FONTSET(f) ((f)->fontset)
+#define FACE_STIPPLE(f) ((f)->stipple)
+#define FACE_UNDERLINE_P(f) ((f)->underline)
+
+#else /* not HAVE_FACES */
+
+typedef int FACE;
+
+#define NORMAL_FACE 0x0
+#define HIGHLIGHT_FACE 0x1
+#define UNDERLINE_FACE 0x2
+#define HIGHLIGHT_UNDERLINE_FACE 0x3
+
+#define FACE_HIGHLIGHT(f) ((f) & 0x1)
+#define FACE_UNDERLINE(f) ((f) & 0x2)
+
+#endif /* not HAVE_FACES */
+
+
+/* This structure is used for the actual display of text on a frame.
There are two instantiations of it: the glyphs currently displayed,
and the glyphs we desire to display. The latter object is generated
- from buffers being displayed. */
+ from buffers being displayed. */
-struct screen_glyphs
+struct frame_glyphs
{
-#ifdef MULTI_SCREEN
- struct screen *screen; /* Screen these glyphs belong to. */
-#endif /* MULTI_SCREEN */
+ struct frame *frame; /* Frame these glyphs belong to. */
int height;
int width;
- int *used; /* Vector of widths (in chars) of lines. */
- /* Vector of line contents.
- m->glyphs[V][H] is the glyph at position V, H.
- Note that ->glyphs[...][screen_width] is always 0
- and so is ->glyphs[...][-1]. */
+ /* Contents of the frame.
+ glyphs[V][H] is the glyph at position V, H.
+ Note that glyphs[V][-1],
+ glyphs[V][used[V]],
+ and glyphs[V][frame_width] are always '\0'. */
GLYPH **glyphs;
/* long vector from which the strings in `glyphs' are taken. */
GLYPH *total_contents;
+ /* When representing a desired frame,
+ enable[n] == 0 means that line n is same as current frame.
+ Between updates, all lines should be disabled.
+ When representing current frame contents,
+ enable[n] == 0 means that line n is blank. */
+ char *enable;
+
+ /* Everything on line n after column used[n] is considered blank. */
+ int *used;
+
/* highlight[n] != 0 iff line n is highlighted. */
char *highlight;
- /* When representing a desired screen, enable[n] == 0 implies line
- n is same as current screen. When representing current screen
- contents, enable[n] == 0 implies line n is blank. */
- char *enable;
-
- /* Buffer offset of this line's first char. */
+ /* Buffer offset of this line's first char.
+ This is not really implemented, and cannot be,
+ and should be deleted. */
int *bufp;
-#ifdef HAVE_X_WINDOWS
- int *nruns; /* N runs of differently displayed text. */
- struct run **face_list;
- short *top_left_x; /* Pixel position of top left corner */
+#ifdef HAVE_WINDOW_SYSTEM
+ /* Pixel position of top left corner of line. */
+ short *top_left_x;
short *top_left_y;
- short *pix_width; /* Pixel width of line. */
- short *pix_height; /* Pixel height of line. */
-#endif /* HAVE_X_WINDOWS */
- };
-#if 0
-#define LINE_HEIGHT(s,n) (current_glyphs->pix_height[n])
-#define LINE_WIDTH(s,n) (current_glyphs->pix_width[n])
-#endif
+ /* Pixel width of line. */
+ short *pix_width;
-#define LINE_HEIGHT(s,n) (FONT_HEIGHT((s)->display.x->font))
-#define LINE_WIDTH(s,n) (FONT_HEIGHT((s)->display.x->font) \
- * SCREEN_CURRENT_GLYPHS(s)->enable[(n)])
+ /* Pixel height of line. */
+ short *pix_height;
+
+ /* Largest font ascent on this line. */
+ short *max_ascent;
+#endif /* HAVE_WINDOW_SYSTEM */
+
+ /* Mapping of coordinate pairs to buffer positions.
+ This field holds a vector indexed by row number.
+ Its elements are vectors indexed by column number.
+ Each element of these vectors is a buffer position, 0, or -1.
+
+ For a column where the image of a text character starts,
+ the element value is the buffer position of that character.
+ When a window's screen line starts in mid character,
+ the element for the line's first column (at the window's left margin)
+ is that character's position.
+ For successive columns within a multicolumn character,
+ the element is -1.
+ For the column just beyond the last glyph on a line,
+ the element is the buffer position of the end of the line.
+ For following columns within the same window, the element is 0.
+ For rows past the end of the accessible buffer text,
+ the window's first column has ZV and other columns have 0.
+
+ Mode lines and vertical separator lines have 0.
+
+ The column of a window's left margin
+ always has a positive value (a buffer position), not 0 or -1,
+ for each line in that window's interior. */
+
+ int **charstarts;
+
+ /* This holds all the space in the subvectors of the charstarts field. */
+ int *total_charstarts;
+ };
extern void get_display_line ();
+extern Lisp_Object sit_for ();
-/* Buffer used by `message' for formatting a message. */
-extern char *message_buf;
-extern int message_buf_size;
+#endif /* not _DISPEXTERN_H_ */