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[Emacs-diffs] Changes to emacs/src/dispextern.h [emacs-unicode-2]
From: |
Kenichi Handa |
Subject: |
[Emacs-diffs] Changes to emacs/src/dispextern.h [emacs-unicode-2] |
Date: |
Mon, 08 Sep 2003 08:48:45 -0400 |
Index: emacs/src/dispextern.h
diff -c /dev/null emacs/src/dispextern.h:1.153.4.1
*** /dev/null Mon Sep 8 08:48:45 2003
--- emacs/src/dispextern.h Mon Sep 8 08:48:10 2003
***************
*** 0 ****
--- 1,2781 ----
+ /* Interface definitions for display code.
+ Copyright (C) 1985, 1993, 1994, 1997, 1998, 1999, 2000, 2001, 2002, 2003
+ 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, Inc., 59 Temple Place - Suite 330,
+ Boston, MA 02111-1307, USA. */
+
+ /* New redisplay written by Gerd Moellmann <address@hidden>. */
+
+ #ifndef DISPEXTERN_H_INCLUDED
+ #define DISPEXTERN_H_INCLUDED
+
+ #ifdef HAVE_X_WINDOWS
+
+ #include <X11/Xlib.h>
+ #ifdef USE_X_TOOLKIT
+ #include <X11/Intrinsic.h>
+ #endif /* USE_X_TOOLKIT */
+
+ #else /* !HAVE_X_WINDOWS */
+
+ /* X-related stuff used by non-X gui code. */
+
+ typedef struct {
+ unsigned long pixel;
+ unsigned short red, green, blue;
+ char flags;
+ char pad;
+ } XColor;
+
+ #endif /* HAVE_X_WINDOWS */
+
+ #ifdef MSDOS
+ #include "msdos.h"
+ #endif
+
+ #ifdef HAVE_X_WINDOWS
+ typedef struct x_display_info Display_Info;
+ #define NativeRectangle XRectangle
+ #endif
+
+ #ifdef HAVE_NTGUI
+ #include "w32gui.h"
+ typedef struct w32_display_info Display_Info;
+ #endif
+
+ #ifdef HAVE_CARBON
+ #include "macgui.h"
+ typedef struct mac_display_info Display_Info;
+
+ /* Include Carbon.h to define Cursor and Rect. */
+ #undef mktime
+ #undef DEBUG
+ #undef Z
+ #undef free
+ #undef malloc
+ #undef realloc
+ /* Macros max and min defined in lisp.h conflict with those in
+ precompiled header Carbon.h. */
+ #undef max
+ #undef min
+ #undef init_process
+ #include <Carbon/Carbon.h>
+ #undef Z
+ #define Z (current_buffer->text->z)
+ #undef free
+ #define free unexec_free
+ #undef malloc
+ #define malloc unexec_malloc
+ #undef realloc
+ #define realloc unexec_realloc
+ #undef min
+ #define min(a, b) ((a) < (b) ? (a) : (b))
+ #undef max
+ #define max(a, b) ((a) > (b) ? (a) : (b))
+ #undef init_process
+ #define init_process emacs_init_process
+
+ #endif
+
+
+ #ifndef NativeRectangle
+ #define NativeRectangle int
+ #endif
+
+
+ /* Structure forward declarations. Some are here because function
+ prototypes below reference structure types before their definition
+ in this file. Some are here because not every file including
+ dispextern.h also includes frame.h and windows.h. */
+
+ struct glyph;
+ struct glyph_row;
+ struct glyph_matrix;
+ struct glyph_pool;
+ struct frame;
+ struct window;
+
+
+ /* Values returned from coordinates_in_window. */
+
+ enum window_part
+ {
+ ON_NOTHING,
+ ON_TEXT,
+ ON_MODE_LINE,
+ ON_VERTICAL_BORDER,
+ ON_HEADER_LINE,
+ ON_LEFT_FRINGE,
+ ON_RIGHT_FRINGE,
+ ON_LEFT_MARGIN,
+ ON_RIGHT_MARGIN
+ };
+
+
+
+ /***********************************************************************
+ Debugging
+ ***********************************************************************/
+
+ /* If GLYPH_DEBUG is non-zero, additional checks are activated. Turn
+ it off by defining the macro GLYPH_DEBUG to zero. */
+
+ #ifndef GLYPH_DEBUG
+ #define GLYPH_DEBUG 0
+ #endif
+
+ /* Macros to include code only if GLYPH_DEBUG != 0. */
+
+ #if GLYPH_DEBUG
+ #define IF_DEBUG(X) X
+ #define xassert(X) do {if (!(X)) abort ();} while (0)
+ #else
+ #define IF_DEBUG(X) (void) 0
+ #define xassert(X) (void) 0
+ #endif
+
+ /* Macro for displaying traces of redisplay. If Emacs was compiled
+ with GLYPH_DEBUG != 0, the variable trace_redisplay_p can be set to
+ a non-zero value in debugging sessions to activate traces. */
+
+ #if GLYPH_DEBUG
+
+ extern int trace_redisplay_p;
+ #include <stdio.h>
+
+ #define TRACE(X) \
+ if (trace_redisplay_p) \
+ fprintf X; \
+ else \
+ (void) 0
+
+ #else /* GLYPH_DEBUG == 0 */
+
+ #define TRACE(X) (void) 0
+
+ #endif /* GLYPH_DEBUG == 0 */
+
+
+
+ /***********************************************************************
+ Text positions
+ ***********************************************************************/
+
+ /* Starting with Emacs 20.3, characters from strings and buffers have
+ both a character and a byte position associated with them. The
+ following structure holds such a pair of positions. */
+
+ struct text_pos
+ {
+ /* Character position. */
+ int charpos;
+
+ /* Corresponding byte position. */
+ int bytepos;
+ };
+
+ /* Access character and byte position of POS in a functional form. */
+
+ #define BYTEPOS(POS) (POS).bytepos
+ #define CHARPOS(POS) (POS).charpos
+
+ /* Set character position of POS to CHARPOS, byte position to BYTEPOS. */
+
+ #define SET_TEXT_POS(POS, CHARPOS, BYTEPOS) \
+ ((POS).charpos = (CHARPOS), (POS).bytepos = BYTEPOS)
+
+ /* Increment text position POS. */
+
+ #define INC_TEXT_POS(POS, MULTIBYTE_P) \
+ do \
+ { \
+ ++(POS).charpos; \
+ if (MULTIBYTE_P) \
+ INC_POS ((POS).bytepos); \
+ else \
+ ++(POS).bytepos; \
+ } \
+ while (0)
+
+ /* Decrement text position POS. */
+
+ #define DEC_TEXT_POS(POS, MULTIBYTE_P) \
+ do \
+ { \
+ --(POS).charpos; \
+ if (MULTIBYTE_P) \
+ DEC_POS ((POS).bytepos); \
+ else \
+ --(POS).bytepos; \
+ } \
+ while (0)
+
+ /* Set text position POS from marker MARKER. */
+
+ #define SET_TEXT_POS_FROM_MARKER(POS, MARKER) \
+ (CHARPOS (POS) = marker_position ((MARKER)), \
+ BYTEPOS (POS) = marker_byte_position ((MARKER)))
+
+ /* Set marker MARKER from text position POS. */
+
+ #define SET_MARKER_FROM_TEXT_POS(MARKER, POS) \
+ set_marker_both ((MARKER), Qnil, CHARPOS ((POS)), BYTEPOS ((POS)))
+
+ /* Value is non-zero if character and byte positions of POS1 and POS2
+ are equal. */
+
+ #define TEXT_POS_EQUAL_P(POS1, POS2) \
+ ((POS1).charpos == (POS2).charpos \
+ && (POS1).bytepos == (POS2).bytepos)
+
+ /* When rendering glyphs, redisplay scans string or buffer text,
+ overlay strings in that text, and does display table or control
+ character translations. The following structure captures a
+ position taking all this into account. */
+
+ struct display_pos
+ {
+ /* Buffer or string position. */
+ struct text_pos pos;
+
+ /* If this is a position in an overlay string, overlay_string_index
+ is the index of that overlay string in the sequence of overlay
+ strings at `pos' in the order redisplay processes them. A value
+ < 0 means that this is not a position in an overlay string. */
+ int overlay_string_index;
+
+ /* If this is a position in an overlay string, string_pos is the
+ position within that string. */
+ struct text_pos string_pos;
+
+ /* If the character at the position above is a control character or
+ has a display table entry, dpvec_index is an index in the display
+ table or control character translation of that character. A
+ value < 0 means this is not a position in such a translation. */
+ int dpvec_index;
+ };
+
+
+
+ /***********************************************************************
+ Glyphs
+ ***********************************************************************/
+
+ /* Enumeration of glyph types. Glyph structures contain a type field
+ containing one of the enumerators defined here. */
+
+ enum glyph_type
+ {
+ /* Glyph describes a character. */
+ CHAR_GLYPH,
+
+ /* Glyph describes a composition sequence. */
+ COMPOSITE_GLYPH,
+
+ /* Glyph describes an image. */
+ IMAGE_GLYPH,
+
+ /* Glyph is a space of fractional width and/or height. */
+ STRETCH_GLYPH
+ };
+
+
+ /* Glyphs.
+
+ Be extra careful when changing this structure! Esp. make sure that
+ functions producing glyphs, like append_glyph, fill ALL of the
+ glyph structure, and that GLYPH_EQUAL_P compares all
+ display-relevant members of glyphs (not to imply that these are the
+ only things to check when you add a member). */
+
+ struct glyph
+ {
+ /* Position from which this glyph was drawn. If `object' below is a
+ Lisp string, this is a position in that string. If it is a
+ buffer, this is a position in that buffer. A value of -1
+ together with a null object means glyph is a truncation glyph at
+ the start of a row. */
+ int charpos;
+
+ /* Lisp object source of this glyph. Currently either a buffer or
+ a string, if the glyph was produced from characters which came from
+ a buffer or a string; or 0 if the glyph was inserted by redisplay
+ for its own purposes such as padding. */
+ Lisp_Object object;
+
+ /* Width in pixels. */
+ short pixel_width;
+
+ /* Vertical offset. If < 0, the glyph is displayed raised, if > 0
+ the glyph is displayed lowered. */
+ short voffset;
+
+ /* Which kind of glyph this is---character, image etc. Value
+ should be an enumerator of type enum glyph_type. */
+ unsigned type : 2;
+
+ /* 1 means this glyph was produced from multibyte text. Zero
+ means it was produced from unibyte text, i.e. charsets aren't
+ applicable, and encoding is not performed. */
+ unsigned multibyte_p : 1;
+
+ /* Non-zero means draw a box line at the left or right side of this
+ glyph. This is part of the implementation of the face attribute
+ `:box'. */
+ unsigned left_box_line_p : 1;
+ unsigned right_box_line_p : 1;
+
+ /* Non-zero means this glyph's physical ascent or descent is greater
+ than its logical ascent/descent, i.e. it may potentially overlap
+ glyphs above or below it. */
+ unsigned overlaps_vertically_p : 1;
+
+ /* 1 means glyph is a padding glyph. Padding glyphs are used for
+ characters whose visual shape consists of more than one glyph
+ (e.g. Asian characters). All but the first glyph of such a glyph
+ sequence have the padding_p flag set. Only used for terminal
+ frames, and there only to minimize code changes. A better way
+ would probably be to use the width field of glyphs to express
+ padding. */
+ unsigned padding_p : 1;
+
+ /* 1 means the actual glyph is not available, draw a box instead.
+ This can happen when a font couldn't be loaded, or a character
+ doesn't have a glyph in a font. */
+ unsigned glyph_not_available_p : 1;
+
+ /* Face of the glyph. */
+ unsigned face_id : 21;
+
+ /* Type of font used to display the character glyph. May be used to
+ determine which set of functions to use to obtain font metrics
+ for the glyph. On W32, value should be an enumerator of the type
+ w32_char_font_type. Otherwise it equals FONT_TYPE_UNKNOWN. */
+ unsigned font_type : 3;
+
+ /* A union of sub-structures for different glyph types. */
+ union
+ {
+ /* Character code for character glyphs (type == CHAR_GLYPH). */
+ unsigned ch;
+
+ /* Composition ID for composition glyphs (type == COMPOSITION_GLYPH) */
+ unsigned cmp_id;
+
+ /* Image ID for image glyphs (type == IMAGE_GLYPH). */
+ unsigned img_id;
+
+ /* Sub-structure for type == STRETCH_GLYPH. */
+ struct
+ {
+ /* The height of the glyph. */
+ unsigned height : 16;
+
+ /* The ascent of the glyph. */
+ unsigned ascent : 16;
+ }
+ stretch;
+
+ /* Used to compare all bit-fields above in one step. */
+ unsigned val;
+ } u;
+ };
+
+
+ /* Default value of the glyph font_type field. */
+
+ #define FONT_TYPE_UNKNOWN 0
+
+ /* Is GLYPH a space? */
+
+ #define CHAR_GLYPH_SPACE_P(GLYPH) \
+ (GLYPH_FROM_CHAR_GLYPH ((GLYPH)) == SPACEGLYPH)
+
+ /* Are glyphs *X and *Y displayed equal? */
+
+ #define GLYPH_EQUAL_P(X, Y) \
+ ((X)->type == (Y)->type \
+ && (X)->u.val == (Y)->u.val \
+ && (X)->face_id == (Y)->face_id \
+ && (X)->padding_p == (Y)->padding_p \
+ && (X)->left_box_line_p == (Y)->left_box_line_p \
+ && (X)->right_box_line_p == (Y)->right_box_line_p \
+ && (X)->voffset == (Y)->voffset \
+ && (X)->pixel_width == (Y)->pixel_width)
+
+ /* Are character codes, faces, padding_ps of glyphs *X and *Y equal? */
+
+ #define GLYPH_CHAR_AND_FACE_EQUAL_P(X, Y) \
+ ((X)->u.ch == (Y)->u.ch \
+ && (X)->face_id == (Y)->face_id \
+ && (X)->padding_p == (Y)->padding_p)
+
+ /* Fill a character glyph GLYPH. CODE, FACE_ID, PADDING_P correspond
+ to the bits defined for the typedef `GLYPH' in lisp.h. */
+
+ #define SET_CHAR_GLYPH(GLYPH, CODE, FACE_ID, PADDING_P) \
+ do \
+ { \
+ (GLYPH).u.ch = (CODE); \
+ (GLYPH).face_id = (FACE_ID); \
+ (GLYPH).padding_p = (PADDING_P); \
+ } \
+ while (0)
+
+ /* Fill a character type glyph GLYPH from a glyph typedef FROM as
+ defined in lisp.h. */
+
+ #define SET_CHAR_GLYPH_FROM_GLYPH(GLYPH, FROM) \
+ SET_CHAR_GLYPH ((GLYPH), \
+ FAST_GLYPH_CHAR ((FROM)), \
+ FAST_GLYPH_FACE ((FROM)), \
+ 0)
+
+ /* Construct a glyph code from a character glyph GLYPH. If the
+ character is multibyte, return -1 as we can't use glyph table for a
+ multibyte character. */
+
+ #define GLYPH_FROM_CHAR_GLYPH(GLYPH) \
+ ((GLYPH).u.ch < 256 \
+ ? ((GLYPH).u.ch | ((GLYPH).face_id << CHARACTERBITS)) \
+ : -1)
+
+ /* Is GLYPH a padding glyph? */
+
+ #define CHAR_GLYPH_PADDING_P(GLYPH) (GLYPH).padding_p
+
+
+
+
+ /***********************************************************************
+ Glyph Pools
+ ***********************************************************************/
+
+ /* Glyph Pool.
+
+ Glyph memory for frame-based redisplay is allocated from the heap
+ in one vector kept in a glyph pool structure which is stored with
+ the frame. The size of the vector is made large enough to cover
+ all windows on the frame.
+
+ Both frame and window glyph matrices reference memory from a glyph
+ pool in frame-based redisplay.
+
+ In window-based redisplay, no glyphs pools exist; windows allocate
+ and free their glyph memory themselves. */
+
+ struct glyph_pool
+ {
+ /* Vector of glyphs allocated from the heap. */
+ struct glyph *glyphs;
+
+ /* Allocated size of `glyphs'. */
+ int nglyphs;
+
+ /* Number of rows and columns in a matrix. */
+ int nrows, ncolumns;
+ };
+
+
+
+ /***********************************************************************
+ Glyph Matrix
+ ***********************************************************************/
+
+ /* Glyph Matrix.
+
+ Three kinds of glyph matrices exist:
+
+ 1. Frame glyph matrices. These are used for terminal frames whose
+ redisplay needs a view of the whole screen due to limited terminal
+ capabilities. Frame matrices are used only in the update phase
+ of redisplay. They are built in update_frame and not used after
+ the update has been performed.
+
+ 2. Window glyph matrices on frames having frame glyph matrices.
+ Such matrices are sub-matrices of their corresponding frame matrix,
+ i.e. frame glyph matrices and window glyph matrices share the same
+ glyph memory which is allocated in form of a glyph_pool structure.
+ Glyph rows in such a window matrix are slices of frame matrix rows.
+
+ 2. Free-standing window glyph matrices managing their own glyph
+ storage. This form is used in window-based redisplay which
+ includes variable width and height fonts etc.
+
+ The size of a window's row vector depends on the height of fonts
+ defined on its frame. It is chosen so that the vector is large
+ enough to describe all lines in a window when it is displayed in
+ the smallest possible character size. When new fonts are loaded,
+ or window sizes change, the row vector is adjusted accordingly. */
+
+ struct glyph_matrix
+ {
+ /* The pool from which glyph memory is allocated, if any. This is
+ null for frame matrices and for window matrices managing their
+ own storage. */
+ struct glyph_pool *pool;
+
+ /* Vector of glyph row structures. The row at nrows - 1 is reserved
+ for the mode line. */
+ struct glyph_row *rows;
+
+ /* Number of elements allocated for the vector rows above. */
+ int rows_allocated;
+
+ /* The number of rows used by the window if all lines were displayed
+ with the smallest possible character height. */
+ int nrows;
+
+ /* Origin within the frame matrix if this is a window matrix on a
+ frame having a frame matrix. Both values are zero for
+ window-based redisplay. */
+ int matrix_x, matrix_y;
+
+ /* Width and height of the matrix in columns and rows. */
+ int matrix_w, matrix_h;
+
+ /* If this structure describes a window matrix of window W,
+ window_left_col is the value of W->left_col, window_top_line the
+ value of W->top_line, window_height and window_width are width and
+ height of W, as returned by window_box, and window_vscroll is the
+ value of W->vscroll at the time the matrix was last adjusted.
+ Only set for window-based redisplay. */
+ int window_left_col, window_top_line;
+ int window_height, window_width;
+ int window_vscroll;
+
+ /* Number of glyphs reserved for left and right marginal areas when
+ the matrix was last adjusted. */
+ int left_margin_glyphs, right_margin_glyphs;
+
+ /* Flag indicating that scrolling should not be tried in
+ update_window. This flag is set by functions like try_window_id
+ which do their own scrolling. */
+ unsigned no_scrolling_p : 1;
+
+ /* Non-zero means window displayed in this matrix has a top mode
+ line. */
+ unsigned header_line_p : 1;
+
+ #ifdef GLYPH_DEBUG
+ /* A string identifying the method used to display the matrix. */
+ char method[512];
+ #endif
+
+ /* The buffer this matrix displays. Set in
+ mark_window_display_accurate_1. */
+ struct buffer *buffer;
+
+ /* Values of BEGV and ZV as of last redisplay. Set in
+ mark_window_display_accurate_1. */
+ int begv, zv;
+ };
+
+
+ /* Check that glyph pointers stored in glyph rows of MATRIX are okay.
+ This aborts if any pointer is found twice. */
+
+ #if GLYPH_DEBUG
+ void check_matrix_pointer_lossage P_ ((struct glyph_matrix *));
+ #define CHECK_MATRIX(MATRIX) check_matrix_pointer_lossage ((MATRIX))
+ #else
+ #define CHECK_MATRIX(MATRIX) (void) 0
+ #endif
+
+
+
+ /***********************************************************************
+ Glyph Rows
+ ***********************************************************************/
+
+ /* Area in window glyph matrix. If values are added or removed, the
+ function mark_object in alloc.c has to be changed. */
+
+ enum glyph_row_area
+ {
+ LEFT_MARGIN_AREA,
+ TEXT_AREA,
+ RIGHT_MARGIN_AREA,
+ LAST_AREA
+ };
+
+
+ /* Rows of glyphs in a windows or frame glyph matrix.
+
+ Each row is partitioned into three areas. The start and end of
+ each area is recorded in a pointer as shown below.
+
+ +--------------------+-------------+---------------------+
+ | left margin area | text area | right margin area |
+ +--------------------+-------------+---------------------+
+ | | | |
+ glyphs[LEFT_MARGIN_AREA] glyphs[RIGHT_MARGIN_AREA]
+ | |
+ glyphs[TEXT_AREA] |
+ glyphs[LAST_AREA]
+
+ Rows in frame matrices reference glyph memory allocated in a frame
+ glyph pool (see the description of struct glyph_pool). Rows in
+ window matrices on frames having frame matrices reference slices of
+ the glyphs of corresponding rows in the frame matrix.
+
+ Rows in window matrices on frames having no frame matrices point to
+ glyphs allocated from the heap via xmalloc;
+ glyphs[LEFT_MARGIN_AREA] is the start address of the allocated
+ glyph structure array. */
+
+ struct glyph_row
+ {
+ /* Pointers to beginnings of areas. The end of an area A is found at
+ A + 1 in the vector. The last element of the vector is the end
+ of the whole row.
+
+ Kludge alert: Even if used[TEXT_AREA] == 0, glyphs[TEXT_AREA][0]'s
+ position field is used. It is -1 if this row does not correspond
+ to any text; it is some buffer position if the row corresponds to
+ an empty display line that displays a line end. This is what old
+ redisplay used to do. (Except in code for terminal frames, this
+ kludge is no longer used, I believe. --gerd).
+
+ See also start, end, displays_text_p and ends_at_zv_p for cleaner
+ ways to do it. The special meaning of positions 0 and -1 will be
+ removed some day, so don't use it in new code. */
+ struct glyph *glyphs[1 + LAST_AREA];
+
+ /* Number of glyphs actually filled in areas. */
+ short used[LAST_AREA];
+
+ /* Window-relative x and y-position of the top-left corner of this
+ row. If y < 0, this means that abs (y) pixels of the row are
+ invisible because it is partially visible at the top of a window.
+ If x < 0, this means that abs (x) pixels of the first glyph of
+ the text area of the row are invisible because the glyph is
+ partially visible. */
+ int x, y;
+
+ /* Width of the row in pixels without taking face extension at the
+ end of the row into account, and without counting truncation
+ and continuation glyphs at the end of a row on ttys. */
+ int pixel_width;
+
+ /* Logical ascent/height of this line. The value of ascent is zero
+ and height is 1 on terminal frames. */
+ int ascent, height;
+
+ /* Physical ascent/height of this line. If max_ascent > ascent,
+ this line overlaps the line above it on the display. Otherwise,
+ if max_height > height, this line overlaps the line beneath it. */
+ int phys_ascent, phys_height;
+
+ /* Portion of row that is visible. Partially visible rows may be
+ found at the top and bottom of a window. This is 1 for tty
+ frames. It may be < 0 in case of completely invisible rows. */
+ int visible_height;
+
+ /* Hash code. This hash code is available as soon as the row
+ is constructed, i.e. after a call to display_line. */
+ unsigned hash;
+
+ /* First position in this row. This is the text position, including
+ overlay position information etc, where the display of this row
+ started, and can thus be less the position of the first glyph
+ (e.g. due to invisible text or horizontal scrolling). */
+ struct display_pos start;
+
+ /* Text position at the end of this row. This is the position after
+ the last glyph on this row. It can be greater than the last
+ glyph position + 1, due to truncation, invisible text etc. In an
+ up-to-date display, this should always be equal to the start
+ position of the next row. */
+ struct display_pos end;
+
+ /* In a desired matrix, 1 means that this row must be updated. In a
+ current matrix, 0 means that the row has been invalidated, i.e.
+ the row's contents do not agree with what is visible on the
+ screen. */
+ unsigned enabled_p : 1;
+
+ /* 1 means row displays a text line that is truncated on the left or
+ right side. */
+ unsigned truncated_on_left_p : 1;
+ unsigned truncated_on_right_p : 1;
+
+ /* 1 means the overlay arrow is on this line. */
+ unsigned overlay_arrow_p : 1;
+
+ /* 1 means that this row displays a continued line, i.e. it has a
+ continuation mark at the right side. */
+ unsigned continued_p : 1;
+
+ /* 0 means that this row does not contain any text, i.e. it is
+ a blank line at the window and buffer end. */
+ unsigned displays_text_p : 1;
+
+ /* 1 means that this line ends at ZV. */
+ unsigned ends_at_zv_p : 1;
+
+ /* 1 means the face of the last glyph in the text area is drawn to
+ the right end of the window. This flag is used in
+ update_text_area to optimize clearing to the end of the area. */
+ unsigned fill_line_p : 1;
+
+ /* Non-zero means display a bitmap on X frames indicating that this
+ line contains no text and ends in ZV. */
+ unsigned indicate_empty_line_p : 1;
+
+ /* 1 means this row contains glyphs that overlap each other because
+ of lbearing or rbearing. */
+ unsigned contains_overlapping_glyphs_p : 1;
+
+ /* 1 means this row is as wide as the window it is displayed in, including
+ scroll bars, fringes, and internal borders. This also
+ implies that the row doesn't have marginal areas. */
+ unsigned full_width_p : 1;
+
+ /* Non-zero means row is a mode or header-line. */
+ unsigned mode_line_p : 1;
+
+ /* 1 in a current row means this row is overlapped by another row. */
+ unsigned overlapped_p : 1;
+
+ /* 1 means this line ends in the middle of a character consisting
+ of more than one glyph. Some glyphs have been put in this row,
+ the rest are put in rows below this one. */
+ unsigned ends_in_middle_of_char_p : 1;
+
+ /* 1 means this line starts in the middle of a character consisting
+ of more than one glyph. Some glyphs have been put in the
+ previous row, the rest are put in this row. */
+ unsigned starts_in_middle_of_char_p : 1;
+
+ /* 1 in a current row means this row overlaps others. */
+ unsigned overlapping_p : 1;
+
+ /* 1 means some glyphs in this row are displayed in mouse-face. */
+ unsigned mouse_face_p : 1;
+
+ /* 1 means this row was ended by a newline from a string. */
+ unsigned ends_in_newline_from_string_p : 1;
+
+ /* Continuation lines width at the start of the row. */
+ int continuation_lines_width;
+ };
+
+
+ /* Get a pointer to row number ROW in matrix MATRIX. If GLYPH_DEBUG
+ is defined to a non-zero value, the function matrix_row checks that
+ we don't try to access rows that are out of bounds. */
+
+ #if GLYPH_DEBUG
+ struct glyph_row *matrix_row P_ ((struct glyph_matrix *, int));
+ #define MATRIX_ROW(MATRIX, ROW) matrix_row ((MATRIX), (ROW))
+ #else
+ #define MATRIX_ROW(MATRIX, ROW) ((MATRIX)->rows + (ROW))
+ #endif
+
+ /* Return a pointer to the row reserved for the mode line in MATRIX.
+ Row MATRIX->nrows - 1 is always reserved for the mode line. */
+
+ #define MATRIX_MODE_LINE_ROW(MATRIX) \
+ ((MATRIX)->rows + (MATRIX)->nrows - 1)
+
+ /* Return a pointer to the row reserved for the header line in MATRIX.
+ This is always the first row in MATRIX because that's the only
+ way that works in frame-based redisplay. */
+
+ #define MATRIX_HEADER_LINE_ROW(MATRIX) (MATRIX)->rows
+
+ /* Return a pointer to first row in MATRIX used for text display. */
+
+ #define MATRIX_FIRST_TEXT_ROW(MATRIX) \
+ ((MATRIX)->rows->mode_line_p ? (MATRIX)->rows + 1 : (MATRIX)->rows)
+
+ /* Return a pointer to the first glyph in the text area of a row.
+ MATRIX is the glyph matrix accessed, and ROW is the row index in
+ MATRIX. */
+
+ #define MATRIX_ROW_GLYPH_START(MATRIX, ROW) \
+ (MATRIX_ROW ((MATRIX), (ROW))->glyphs[TEXT_AREA])
+
+ /* Return the number of used glyphs in the text area of a row. */
+
+ #define MATRIX_ROW_USED(MATRIX, ROW) \
+ (MATRIX_ROW ((MATRIX), (ROW))->used[TEXT_AREA])
+
+ /* Return the character/ byte position at which the display of ROW
+ starts. */
+
+ #define MATRIX_ROW_START_CHARPOS(ROW) ((ROW)->start.pos.charpos)
+ #define MATRIX_ROW_START_BYTEPOS(ROW) ((ROW)->start.pos.bytepos)
+
+ /* Return the character/ byte position at which ROW ends. */
+
+ #define MATRIX_ROW_END_CHARPOS(ROW) ((ROW)->end.pos.charpos)
+ #define MATRIX_ROW_END_BYTEPOS(ROW) ((ROW)->end.pos.bytepos)
+
+ /* Return the vertical position of ROW in MATRIX. */
+
+ #define MATRIX_ROW_VPOS(ROW, MATRIX) ((ROW) - (MATRIX)->rows)
+
+ /* Return the last glyph row + 1 in MATRIX on window W reserved for
+ text. If W has a mode line, the last row in the matrix is reserved
+ for it. */
+
+ #define MATRIX_BOTTOM_TEXT_ROW(MATRIX, W) \
+ ((MATRIX)->rows \
+ + (MATRIX)->nrows \
+ - (WINDOW_WANTS_MODELINE_P ((W)) ? 1 : 0))
+
+ /* Non-zero if the face of the last glyph in ROW's text area has
+ to be drawn to the end of the text area. */
+
+ #define MATRIX_ROW_EXTENDS_FACE_P(ROW) ((ROW)->fill_line_p)
+
+ /* Set and query the enabled_p flag of glyph row ROW in MATRIX. */
+
+ #define SET_MATRIX_ROW_ENABLED_P(MATRIX, ROW, VALUE) \
+ (MATRIX_ROW ((MATRIX), (ROW))->enabled_p = (VALUE) != 0)
+
+ #define MATRIX_ROW_ENABLED_P(MATRIX, ROW) \
+ (MATRIX_ROW ((MATRIX), (ROW))->enabled_p)
+
+ /* Non-zero if ROW displays text. Value is non-zero if the row is
+ blank but displays a line end. */
+
+ #define MATRIX_ROW_DISPLAYS_TEXT_P(ROW) ((ROW)->displays_text_p)
+
+ /* Non-zero if ROW is not completely visible in window W. */
+
+ #define MATRIX_ROW_PARTIALLY_VISIBLE_P(ROW) \
+ ((ROW)->height != (ROW)->visible_height)
+
+ /* Non-zero if ROW is partially visible at the top of window W. */
+
+ #define MATRIX_ROW_PARTIALLY_VISIBLE_AT_TOP_P(W, ROW) \
+ (MATRIX_ROW_PARTIALLY_VISIBLE_P ((ROW)) \
+ && (ROW)->y < WINDOW_HEADER_LINE_HEIGHT ((W)))
+
+ /* Non-zero if ROW is partially visible at the bottom of window W. */
+
+ #define MATRIX_ROW_PARTIALLY_VISIBLE_AT_BOTTOM_P(W, ROW) \
+ (MATRIX_ROW_PARTIALLY_VISIBLE_P ((ROW)) \
+ && (ROW)->y + (ROW)->height > WINDOW_BOX_HEIGHT_NO_MODE_LINE ((W)))
+
+ /* Return the bottom Y + 1 of ROW. */
+
+ #define MATRIX_ROW_BOTTOM_Y(ROW) ((ROW)->y + (ROW)->height)
+
+ /* Is ROW the last visible one in the display described by the
+ iterator structure pointed to by IT?. */
+
+ #define MATRIX_ROW_LAST_VISIBLE_P(ROW, IT) \
+ (MATRIX_ROW_BOTTOM_Y ((ROW)) >= (IT)->last_visible_y)
+
+ /* Non-zero if ROW displays a continuation line. */
+
+ #define MATRIX_ROW_CONTINUATION_LINE_P(ROW) \
+ ((ROW)->continuation_lines_width > 0)
+
+ /* Non-zero if ROW ends in the middle of a character. This is the
+ case for continued lines showing only part of a display table entry
+ or a control char, or an overlay string. */
+
+ #define MATRIX_ROW_ENDS_IN_MIDDLE_OF_CHAR_P(ROW) \
+ ((ROW)->end.dpvec_index >= 0 \
+ || (ROW)->end.overlay_string_index >= 0 \
+ || (ROW)->ends_in_middle_of_char_p)
+
+ /* Non-zero if ROW ends in the middle of an overlay string. */
+
+ #define MATRIX_ROW_ENDS_IN_OVERLAY_STRING_P(ROW) \
+ ((ROW)->end.overlay_string_index >= 0)
+
+ /* Non-zero if ROW starts in the middle of a character. See above. */
+
+ #define MATRIX_ROW_STARTS_IN_MIDDLE_OF_CHAR_P(ROW) \
+ ((ROW)->start.dpvec_index >= 0 \
+ || (ROW)->starts_in_middle_of_char_p \
+ || ((ROW)->start.overlay_string_index >= 0 \
+ && (ROW)->start.string_pos.charpos > 0))
+
+ /* Non-zero means ROW overlaps its predecessor. */
+
+ #define MATRIX_ROW_OVERLAPS_PRED_P(ROW) \
+ ((ROW)->phys_ascent > (ROW)->ascent)
+
+ /* Non-zero means ROW overlaps its successor. */
+
+ #define MATRIX_ROW_OVERLAPS_SUCC_P(ROW) \
+ ((ROW)->phys_height - (ROW)->phys_ascent \
+ > (ROW)->height - (ROW)->ascent)
+
+ /* Non-zero means that fonts have been loaded since the last glyph
+ matrix adjustments. The function redisplay_internal adjusts glyph
+ matrices when this flag is non-zero. */
+
+ extern int fonts_changed_p;
+
+ /* A glyph for a space. */
+
+ extern struct glyph space_glyph;
+
+ /* Frame being updated by update_window/update_frame. */
+
+ extern struct frame *updating_frame;
+
+ /* Window being updated by update_window. This is non-null as long as
+ update_window has not finished, and null otherwise. It's role is
+ analogous to updating_frame. */
+
+ extern struct window *updated_window;
+
+ /* Glyph row and area updated by update_window_line. */
+
+ extern struct glyph_row *updated_row;
+ extern int updated_area;
+
+ /* Non-zero means reading single-character input with prompt so put
+ cursor on mini-buffer after the prompt. Positive means at end of
+ text in echo area; negative means at beginning of line. */
+
+ extern int cursor_in_echo_area;
+
+ /* Non-zero means last display completed. Zero means it was
+ preempted. */
+
+ extern int display_completed;
+
+ /* Non-zero means redisplay has been performed directly (see also
+ direct_output_for_insert and direct_output_forward_char), so that
+ no further updating has to be performed. The function
+ redisplay_internal checks this flag, and does nothing but reset it
+ to zero if it is non-zero. */
+
+ extern int redisplay_performed_directly_p;
+
+ /* A temporary storage area, including a row of glyphs. Initialized
+ in xdisp.c. Used for various purposes, as an example see
+ direct_output_for_insert. */
+
+ extern struct glyph_row scratch_glyph_row;
+
+
+
+ /************************************************************************
+ Glyph Strings
+ ************************************************************************/
+
+ /* Enumeration for overriding/changing the face to use for drawing
+ glyphs in draw_glyphs. */
+
+ enum draw_glyphs_face
+ {
+ DRAW_NORMAL_TEXT,
+ DRAW_INVERSE_VIDEO,
+ DRAW_CURSOR,
+ DRAW_MOUSE_FACE,
+ DRAW_IMAGE_RAISED,
+ DRAW_IMAGE_SUNKEN
+ };
+
+ #ifdef HAVE_WINDOW_SYSTEM
+
+ /* A sequence of glyphs to be drawn in the same face. */
+
+ struct glyph_string
+ {
+ /* X-origin of the string. */
+ int x;
+
+ /* Y-origin and y-position of the base line of this string. */
+ int y, ybase;
+
+ /* The width of the string, not including a face extension. */
+ int width;
+
+ /* The width of the string, including a face extension. */
+ int background_width;
+
+ /* The height of this string. This is the height of the line this
+ string is drawn in, and can be different from the height of the
+ font the string is drawn in. */
+ int height;
+
+ /* Number of pixels this string overwrites in front of its x-origin.
+ This number is zero if the string has an lbearing >= 0; it is
+ -lbearing, if the string has an lbearing < 0. */
+ int left_overhang;
+
+ /* Number of pixels this string overwrites past its right-most
+ nominal x-position, i.e. x + width. Zero if the string's
+ rbearing is <= its nominal width, rbearing - width otherwise. */
+ int right_overhang;
+
+ /* The frame on which the glyph string is drawn. */
+ struct frame *f;
+
+ /* The window on which the glyph string is drawn. */
+ struct window *w;
+
+ /* X display and window for convenience. */
+ Display *display;
+ Window window;
+
+ /* The glyph row for which this string was built. It determines the
+ y-origin and height of the string. */
+ struct glyph_row *row;
+
+ /* The area within row. */
+ enum glyph_row_area area;
+
+ /* Characters to be drawn, and number of characters. */
+ XChar2b *char2b;
+ int nchars;
+
+ /* A face-override for drawing cursors, mouse face and similar. */
+ enum draw_glyphs_face hl;
+
+ /* Face in which this string is to be drawn. */
+ struct face *face;
+
+ /* Font in which this string is to be drawn. */
+ XFontStruct *font;
+
+ /* Font info for this string. */
+ struct font_info *font_info;
+
+ /* Non-null means this string describes (part of) a composition.
+ All characters from char2b are drawn composed. */
+ struct composition *cmp;
+
+ /* Index of this glyph string's first character in the glyph
+ definition of CMP. If this is zero, this glyph string describes
+ the first character of a composition. */
+ int gidx;
+
+ /* 1 means this glyph strings face has to be drawn to the right end
+ of the window's drawing area. */
+ unsigned extends_to_end_of_line_p : 1;
+
+ /* 1 means the background of this string has been drawn. */
+ unsigned background_filled_p : 1;
+
+ /* 1 means glyph string must be drawn with 16-bit functions. */
+ unsigned two_byte_p : 1;
+
+ /* 1 means that the original font determined for drawing this glyph
+ string could not be loaded. The member `font' has been set to
+ the frame's default font in this case. */
+ unsigned font_not_found_p : 1;
+
+ /* 1 means that the face in which this glyph string is drawn has a
+ stipple pattern. */
+ unsigned stippled_p : 1;
+
+ /* 1 means only the foreground of this glyph string must be drawn,
+ and we should use the physical height of the line this glyph
+ string appears in as clip rect. */
+ unsigned for_overlaps_p : 1;
+
+ /* The GC to use for drawing this glyph string. */
+ #if defined(HAVE_X_WINDOWS) || defined(HAVE_CARBON)
+ GC gc;
+ #endif
+ #if defined(HAVE_NTGUI)
+ XGCValues *gc;
+ HDC hdc;
+ #endif
+
+ /* A pointer to the first glyph in the string. This glyph
+ corresponds to char2b[0]. Needed to draw rectangles if
+ font_not_found_p is 1. */
+ struct glyph *first_glyph;
+
+ /* Image, if any. */
+ struct image *img;
+
+ struct glyph_string *next, *prev;
+ };
+
+ #endif /* HAVE_WINDOW_SYSTEM */
+
+
+ /************************************************************************
+ Display Dimensions
+ ************************************************************************/
+
+ /* Return the height of the mode line in glyph matrix MATRIX, or zero
+ if not known. This macro is called under circumstances where
+ MATRIX might not have been allocated yet. */
+
+ #define MATRIX_MODE_LINE_HEIGHT(MATRIX) \
+ ((MATRIX) && (MATRIX)->rows \
+ ? MATRIX_MODE_LINE_ROW (MATRIX)->height \
+ : 0)
+
+ /* Return the height of the header line in glyph matrix MATRIX, or zero
+ if not known. This macro is called under circumstances where
+ MATRIX might not have been allocated yet. */
+
+ #define MATRIX_HEADER_LINE_HEIGHT(MATRIX) \
+ ((MATRIX) && (MATRIX)->rows \
+ ? MATRIX_HEADER_LINE_ROW (MATRIX)->height \
+ : 0)
+
+ /* Return the desired face id for the mode line of a window, depending
+ on whether the window is selected or not, or if the window is the
+ scrolling window for the currently active minibuffer window.
+
+ Due to the way display_mode_lines manipulates with the contents of
+ selected_window, this macro needs three arguments: SELW which is
+ compared against the current value of selected_window, MBW which is
+ compared against minibuf_window (if SELW doesn't match), and SCRW
+ which is compared against minibuf_selected_window (if MBW matches). */
+
+ #define CURRENT_MODE_LINE_FACE_ID_3(SELW, MBW, SCRW) \
+ ((!mode_line_in_non_selected_windows \
+ || (SELW) == XWINDOW (selected_window) \
+ || (minibuf_level > 0 \
+ && !NILP (minibuf_selected_window) \
+ && (MBW) == XWINDOW (minibuf_window) \
+ && (SCRW) == XWINDOW (minibuf_selected_window))) \
+ ? MODE_LINE_FACE_ID \
+ : MODE_LINE_INACTIVE_FACE_ID)
+
+
+ /* Return the desired face id for the mode line of window W. */
+
+ #define CURRENT_MODE_LINE_FACE_ID(W) \
+ (CURRENT_MODE_LINE_FACE_ID_3((W), XWINDOW (selected_window), (W)))
+
+ /* Return the current height of the mode line of window W. If not
+ known from current_mode_line_height, look at W's current glyph
+ matrix, or return a default based on the height of the font of the
+ face `mode-line'. */
+
+ #define CURRENT_MODE_LINE_HEIGHT(W) \
+ (current_mode_line_height >= 0 \
+ ? current_mode_line_height \
+ : (MATRIX_MODE_LINE_HEIGHT ((W)->current_matrix) \
+ ? MATRIX_MODE_LINE_HEIGHT ((W)->current_matrix) \
+ : estimate_mode_line_height (XFRAME ((W)->frame), \
+ CURRENT_MODE_LINE_FACE_ID (W))))
+
+ /* Return the current height of the header line of window W. If not
+ known from current_header_line_height, look at W's current glyph
+ matrix, or return an estimation based on the height of the font of
+ the face `header-line'. */
+
+ #define CURRENT_HEADER_LINE_HEIGHT(W) \
+ (current_header_line_height >= 0 \
+ ? current_header_line_height \
+ : (MATRIX_HEADER_LINE_HEIGHT ((W)->current_matrix) \
+ ? MATRIX_HEADER_LINE_HEIGHT ((W)->current_matrix) \
+ : estimate_mode_line_height (XFRAME ((W)->frame), \
+ HEADER_LINE_FACE_ID)))
+
+ /* Return the height of the desired mode line of window W. */
+
+ #define DESIRED_MODE_LINE_HEIGHT(W) \
+ MATRIX_MODE_LINE_HEIGHT ((W)->desired_matrix)
+
+ /* Return the height of the desired header line of window W. */
+
+ #define DESIRED_HEADER_LINE_HEIGHT(W) \
+ MATRIX_HEADER_LINE_HEIGHT ((W)->desired_matrix)
+
+ /* Value is non-zero if window W wants a mode line. */
+
+ #define WINDOW_WANTS_MODELINE_P(W) \
+ (!MINI_WINDOW_P ((W)) \
+ && !(W)->pseudo_window_p
\
+ && FRAME_WANTS_MODELINE_P (XFRAME (WINDOW_FRAME ((W)))) \
+ && BUFFERP ((W)->buffer)
\
+ && !NILP (XBUFFER ((W)->buffer)->mode_line_format) \
+ && WINDOW_TOTAL_LINES (W) > 1)
+
+ /* Value is non-zero if window W wants a header line. */
+
+ #define WINDOW_WANTS_HEADER_LINE_P(W) \
+ (!MINI_WINDOW_P ((W)) \
+ && !(W)->pseudo_window_p
\
+ && FRAME_WANTS_MODELINE_P (XFRAME (WINDOW_FRAME ((W)))) \
+ && BUFFERP ((W)->buffer)
\
+ && !NILP (XBUFFER ((W)->buffer)->header_line_format) \
+ && WINDOW_TOTAL_LINES (W) > 1 + !NILP (XBUFFER
((W)->buffer)->mode_line_format))
+
+
+ /* Return proper value to be used as baseline offset of font that has
+ ASCENT and DESCENT to draw characters by the font at the vertical
+ center of the line of frame F.
+
+ Here, our task is to find the value of BOFF in the following figure;
+
+ -------------------------+-----------+-
+ -+-+---------+-+ | |
+ | | | | | |
+ | | | | F_ASCENT F_HEIGHT
+ | | | ASCENT | |
+ HEIGHT | | | | |
+ | | |-|-+------+-----------|------- baseline
+ | | | | BOFF | |
+ | |---------|-+-+ | |
+ | | | DESCENT | |
+ -+-+---------+-+ F_DESCENT |
+ -------------------------+-----------+-
+
+ -BOFF + DESCENT + (F_HEIGHT - HEIGHT) / 2 = F_DESCENT
+ BOFF = DESCENT + (F_HEIGHT - HEIGHT) / 2 - F_DESCENT
+ DESCENT = FONT->descent
+ HEIGHT = FONT_HEIGHT (FONT)
+ F_DESCENT = (FRAME_FONT (F)->descent
+ - F->output_data.x->baseline_offset)
+ F_HEIGHT = FRAME_LINE_HEIGHT (F)
+ */
+
+ #define VCENTER_BASELINE_OFFSET(FONT, F) \
+ (FONT_DESCENT (FONT) \
+ + (FRAME_LINE_HEIGHT ((F)) - FONT_HEIGHT ((FONT)) \
+ + (FRAME_LINE_HEIGHT ((F)) > FONT_HEIGHT ((FONT)))) / 2 \
+ - (FONT_DESCENT (FRAME_FONT (F)) - FRAME_BASELINE_OFFSET (F)))
+
+
+ /***********************************************************************
+ Faces
+ ***********************************************************************/
+
+ /* Indices of face attributes in Lisp face vectors. Slot zero is the
+ symbol `face'. */
+
+ enum lface_attribute_index
+ {
+ LFACE_FAMILY_INDEX = 1,
+ LFACE_SWIDTH_INDEX,
+ LFACE_HEIGHT_INDEX,
+ LFACE_WEIGHT_INDEX,
+ LFACE_SLANT_INDEX,
+ LFACE_UNDERLINE_INDEX,
+ LFACE_INVERSE_INDEX,
+ LFACE_FOREGROUND_INDEX,
+ LFACE_BACKGROUND_INDEX,
+ LFACE_STIPPLE_INDEX,
+ LFACE_OVERLINE_INDEX,
+ LFACE_STRIKE_THROUGH_INDEX,
+ LFACE_BOX_INDEX,
+ LFACE_FONT_INDEX,
+ LFACE_INHERIT_INDEX,
+ LFACE_AVGWIDTH_INDEX,
+ LFACE_FONTSET_INDEX,
+ LFACE_VECTOR_SIZE
+ };
+
+
+ /* Box types of faces. */
+
+ enum face_box_type
+ {
+ /* No box around text. */
+ FACE_NO_BOX,
+
+ /* Simple box of specified width and color. Default width is 1, and
+ default color is the foreground color of the face. */
+ FACE_SIMPLE_BOX,
+
+ /* Boxes with 3D shadows. Color equals the background color of the
+ face. Width is specified. */
+ FACE_RAISED_BOX,
+ FACE_SUNKEN_BOX
+ };
+
+
+ /* Structure describing a realized face.
+
+ For each Lisp face, 0..N realized faces can exist for different
+ frames and different charsets. Realized faces are built from Lisp
+ faces and text properties/overlays by merging faces and adding
+ unspecified attributes from the `default' face. */
+
+ struct face
+ {
+ /* The id of this face. The id equals the index of this face in the
+ vector faces_by_id of its face cache. */
+ int id;
+
+ #ifdef HAVE_WINDOW_SYSTEM
+
+ /* If non-zero, this is a GC that we can use without modification for
+ drawing the characters in this face. */
+ GC gc;
+
+ /* Font used for this face, or null if the font could not be loaded
+ for some reason. This points to a `font' slot of a struct
+ font_info, and we should not call XFreeFont on it because the
+ font may still be used somewhere else. */
+ XFontStruct *font;
+
+ /* Background stipple or bitmap used for this face. This is
+ an id as returned from load_pixmap. */
+ int stipple;
+
+ #else /* not HAVE_WINDOW_SYSTEM */
+
+ /* Dummy. */
+ int stipple;
+
+ #endif /* not HAVE_WINDOW_SYSTEM */
+
+ /* Pixel value of foreground color for X frames. Color index
+ for tty frames. */
+ unsigned long foreground;
+
+ /* Pixel value or color index of background color. */
+ unsigned long background;
+
+ /* Pixel value or color index of underline color. */
+ unsigned long underline_color;
+
+ /* Pixel value or color index of overlined, strike-through, or box
+ color. */
+ unsigned long overline_color;
+ unsigned long strike_through_color;
+ unsigned long box_color;
+
+ /* The font's name. This points to a `name' of a font_info, and it
+ must not be freed. */
+ char *font_name;
+
+ /* Font info ID for this face's font. An ID is stored here because
+ pointers to font_info structures may change. The reason is that
+ they are pointers into a font table vector that is itself
+ reallocated. */
+ int font_info_id;
+
+ /* Fontset ID if for this face's fontset. Non-ASCII faces derived
+ from the same ASCII face have the same fontset. */
+ int fontset;
+
+ /* Pixmap width and height. */
+ unsigned int pixmap_w, pixmap_h;
+
+ /* Non-zero means characters in this face have a box that thickness
+ around them. If it is negative, the absolute value indicates the
+ thickness, and the horizontal lines of box (top and bottom) are
+ drawn inside of characters glyph area. The vertical lines of box
+ (left and right) are drawn as the same way as the case that this
+ value is positive. */
+ int box_line_width;
+
+ /* Type of box drawn. A value of FACE_NO_BOX means no box is drawn
+ around text in this face. A value of FACE_SIMPLE_BOX means a box
+ of width box_line_width is drawn in color box_color. A value of
+ FACE_RAISED_BOX or FACE_SUNKEN_BOX means a 3D box is drawn with
+ shadow colors derived from the background color of the face. */
+ enum face_box_type box;
+
+ /* If `box' above specifies a 3D type, 1 means use box_color for
+ drawing shadows. */
+ unsigned use_box_color_for_shadows_p : 1;
+
+ /* The Lisp face attributes this face realizes. All attributes
+ in this vector are non-nil. */
+ Lisp_Object lface[LFACE_VECTOR_SIZE];
+
+ /* The hash value of this face. */
+ unsigned hash;
+
+ /* Non-zero if text in this face should be underlined, overlined,
+ strike-through or have a box drawn around it. */
+ unsigned underline_p : 1;
+ unsigned overline_p : 1;
+ unsigned strike_through_p : 1;
+
+ /* 1 means that the colors specified for this face could not be
+ loaded, and were replaced by default colors, so they shouldn't be
+ freed. */
+ unsigned foreground_defaulted_p : 1;
+ unsigned background_defaulted_p : 1;
+
+ /* 1 means that either no color is specified for underlining or that
+ the specified color couldn't be loaded. Use the foreground
+ color when drawing in that case. */
+ unsigned underline_defaulted_p : 1;
+
+ /* 1 means that either no color is specified for the corresponding
+ attribute or that the specified color couldn't be loaded.
+ Use the foreground color when drawing in that case. */
+ unsigned overline_color_defaulted_p : 1;
+ unsigned strike_through_color_defaulted_p : 1;
+ unsigned box_color_defaulted_p : 1;
+
+ /* TTY appearances. Blinking is not yet implemented. Colors are
+ found in `lface' with empty color string meaning the default
+ color of the TTY. */
+ unsigned tty_bold_p : 1;
+ unsigned tty_dim_p : 1;
+ unsigned tty_underline_p : 1;
+ unsigned tty_alt_charset_p : 1;
+ unsigned tty_reverse_p : 1;
+ unsigned tty_blinking_p : 1;
+
+ /* 1 means that colors of this face may not be freed because they
+ have been copied bitwise from a base face (see
+ realize_x_face). */
+ unsigned colors_copied_bitwise_p : 1;
+
+ /* If non-zero, use overstrike (to simulate bold-face). */
+ unsigned overstrike : 1;
+
+ /* Next and previous face in hash collision list of face cache. */
+ struct face *next, *prev;
+
+ /* If this face is an ASCII face, this points to this face itself.
+ Otherwise, this points to an ASCII face that has the same
+ attributes except the font. */
+ struct face *ascii_face;
+ };
+
+
+ /* Color index indicating that face uses a terminal's default color. */
+
+ #define FACE_TTY_DEFAULT_COLOR ((unsigned long) -1)
+
+ /* Color index indicating that face uses an unknown foreground color. */
+
+ #define FACE_TTY_DEFAULT_FG_COLOR ((unsigned long) -2)
+
+ /* Color index indicating that face uses an unknown background color. */
+
+ #define FACE_TTY_DEFAULT_BG_COLOR ((unsigned long) -3)
+
+ /* Non-zero if FACE was realized for unibyte use. */
+
+ #define FACE_UNIBYTE_P(FACE) ((FACE)->charset < 0)
+
+
+ /* IDs of important faces known by the C face code. These are the IDs
+ of the faces for CHARSET_ASCII. */
+
+ enum face_id
+ {
+ DEFAULT_FACE_ID,
+ MODE_LINE_FACE_ID,
+ MODE_LINE_INACTIVE_FACE_ID,
+ TOOL_BAR_FACE_ID,
+ FRINGE_FACE_ID,
+ HEADER_LINE_FACE_ID,
+ SCROLL_BAR_FACE_ID,
+ BORDER_FACE_ID,
+ CURSOR_FACE_ID,
+ MOUSE_FACE_ID,
+ MENU_FACE_ID,
+ BASIC_FACE_ID_SENTINEL
+ };
+
+
+ /* A cache of realized faces. Each frame has its own cache because
+ Emacs allows different frame-local face definitions. */
+
+ struct face_cache
+ {
+ /* Hash table of cached realized faces. */
+ struct face **buckets;
+
+ /* Back-pointer to the frame this cache belongs to. */
+ struct frame *f;
+
+ /* A vector of faces so that faces can be referenced by an ID. */
+ struct face **faces_by_id;
+
+ /* The allocated size, and number of used slots of faces_by_id. */
+ int size, used;
+
+ /* Flag indicating that attributes of the `menu' face have been
+ changed. */
+ unsigned menu_face_changed_p : 1;
+ };
+
+
+ /* Prepare face FACE for use on frame F. This must be called before
+ using X resources of FACE. */
+
+ #define PREPARE_FACE_FOR_DISPLAY(F, FACE) \
+ if ((FACE)->gc == 0) \
+ prepare_face_for_display ((F), (FACE)); \
+ else \
+ (void) 0
+
+ /* Return a pointer to the face with ID on frame F, or null if such a
+ face doesn't exist. */
+
+ #define FACE_FROM_ID(F, ID) \
+ (((unsigned) (ID) < FRAME_FACE_CACHE (F)->used) \
+ ? FRAME_FACE_CACHE (F)->faces_by_id[ID] \
+ : NULL)
+
+ #ifdef HAVE_WINDOW_SYSTEM
+
+ /* Non-zero if FACE is suitable for displaying character CHAR. */
+
+ #define FACE_SUITABLE_FOR_CHAR_P(FACE, CHAR) \
+ (ASCII_CHAR_P (CHAR) \
+ ? (FACE) == (FACE)->ascii_face \
+ : face_suitable_for_char_p ((FACE), (CHAR)))
+
+ /* Return the id of the realized face on frame F that is like the face
+ with id ID but is suitable for displaying character CHAR.
+ This macro is only meaningful for multibyte character CHAR. */
+
+ #define FACE_FOR_CHAR(F, FACE, CHAR) \
+ (ASCII_CHAR_P (CHAR) \
+ ? (FACE)->ascii_face->id \
+ : face_for_char ((F), (FACE), (CHAR)))
+
+ #else /* not HAVE_WINDOW_SYSTEM */
+
+ #define FACE_SUITABLE_FOR_CHAR_P(FACE, CHAR) 1
+ #define FACE_FOR_CHAR(F, FACE, CHAR) ((FACE)->id)
+
+ #endif /* not HAVE_WINDOW_SYSTEM */
+
+ /* Non-zero means face attributes have been changed since the last
+ redisplay. Used in redisplay_internal. */
+
+ extern int face_change_count;
+
+
+
+
+ /***********************************************************************
+ Fringes
+ ***********************************************************************/
+
+ enum fringe_bitmap_type
+ {
+ NO_FRINGE_BITMAP = 0,
+ LEFT_TRUNCATION_BITMAP,
+ RIGHT_TRUNCATION_BITMAP,
+ CONTINUED_LINE_BITMAP,
+ CONTINUATION_LINE_BITMAP,
+ OVERLAY_ARROW_BITMAP,
+ ZV_LINE_BITMAP,
+ MAX_FRINGE_BITMAPS
+ };
+
+ struct fringe_bitmap
+ {
+ int width;
+ int height;
+ int period;
+ unsigned char *bits;
+ };
+
+ /* Structure used to describe where and how to draw a fringe bitmap.
+ WHICH is the fringe bitmap to draw. WD and H is the (adjusted)
+ width and height of the bitmap, DH is the height adjustment (if
+ bitmap is periodic). X and Y are frame coordinates of the area to
+ display the bitmap, DY is relative offset of the bitmap into that
+ area. BX, NX, BY, NY specifies the area to clear if the bitmap
+ does not fill the entire area. FACE is the fringe face. */
+
+ struct draw_fringe_bitmap_params
+ {
+ enum fringe_bitmap_type which;
+ int wd, h, dh;
+ int x, y;
+ int bx, nx, by, ny;
+ struct face *face;
+ };
+
+ extern struct fringe_bitmap fringe_bitmaps[MAX_FRINGE_BITMAPS];
+
+
+ /***********************************************************************
+ Display Iterator
+ ***********************************************************************/
+
+ /* Iteration over things to display in current_buffer or in a string.
+
+ The iterator handles:
+
+ 1. Overlay strings (after-string, before-string).
+ 2. Face properties.
+ 3. Invisible text properties.
+ 4. Selective display.
+ 5. Translation of characters via display tables.
+ 6. Translation of control characters to the forms `\003' or `^C'.
+ 7. `glyph' and `space-width' properties.
+
+ Iterators are initialized by calling init_iterator or one of the
+ equivalent functions below. A call to get_next_display_element
+ loads the iterator structure with information about what next to
+ display. A call to set_iterator_to_next increments the iterator's
+ position.
+
+ Characters from overlay strings, display table entries or control
+ character translations are returned one at a time. For example, if
+ we have a text of `a\x01' where `a' has a display table definition
+ of `cd' and the control character is displayed with a leading
+ arrow, then the iterator will return:
+
+ Call Return Source Call next
+ -----------------------------------------------------------------
+ next c display table move
+ next d display table move
+ next ^ control char move
+ next A control char move
+
+ The same mechanism is also used to return characters for ellipses
+ displayed at the end of invisible text.
+
+ CAVEAT: Under some circumstances, move_.* functions can be called
+ asynchronously, e.g. when computing a buffer position from an x and
+ y pixel position. This means that these functions and functions
+ called from them SHOULD NOT USE xmalloc and alike. See also the
+ comment at the start of xdisp.c. */
+
+ /* Enumeration describing what kind of display element an iterator is
+ loaded with after a call to get_next_display_element. */
+
+ enum display_element_type
+ {
+ /* A normal character. */
+ IT_CHARACTER,
+
+ /* A composition sequence. */
+ IT_COMPOSITION,
+
+ /* An image. */
+ IT_IMAGE,
+
+ /* A flexible width and height space. */
+ IT_STRETCH,
+
+ /* End of buffer or string. */
+ IT_EOB,
+
+ /* Truncation glyphs. Never returned by get_next_display_element.
+ Used to get display information about truncation glyphs via
+ produce_glyphs. */
+ IT_TRUNCATION,
+
+ /* Continuation glyphs. See the comment for IT_TRUNCATION. */
+ IT_CONTINUATION
+ };
+
+
+ /* An enumerator for each text property that has a meaning for display
+ purposes. */
+
+ enum prop_idx
+ {
+ AUTO_COMPOSED_PROP_IDX,
+ FONTIFIED_PROP_IDX,
+ FACE_PROP_IDX,
+ INVISIBLE_PROP_IDX,
+ DISPLAY_PROP_IDX,
+ COMPOSITION_PROP_IDX,
+
+ /* Not a property. Used to indicate changes in overlays. */
+ OVERLAY_PROP_IDX,
+
+ /* Sentinel. */
+ LAST_PROP_IDX
+ };
+
+
+ struct it
+ {
+ /* The window in which we iterate over current_buffer (or a string). */
+ Lisp_Object window;
+ struct window *w;
+
+ /* The window's frame. */
+ struct frame *f;
+
+ /* Function to call to load this structure with the next display
+ element. */
+ int (* method) P_ ((struct it *it));
+
+ /* The next position at which to check for face changes, invisible
+ text, overlay strings, end of text etc., which see. */
+ int stop_charpos;
+
+ /* Maximum string or buffer position + 1. ZV when iterating over
+ current_buffer. */
+ int end_charpos;
+
+ /* C string to iterate over. Non-null means get characters from
+ this string, otherwise characters are read from current_buffer
+ or it->string. */
+ unsigned char *s;
+
+ /* Number of characters in the string (s, or it->string) we iterate
+ over. */
+ int string_nchars;
+
+ /* Start and end of a visible region; -1 if the region is not
+ visible in the window. */
+ int region_beg_charpos, region_end_charpos;
+
+ /* Position at which redisplay end trigger functions should be run. */
+ int redisplay_end_trigger_charpos;
+
+ /* 1 means multibyte characters are enabled. */
+ unsigned multibyte_p : 1;
+
+ /* 1 means window has a mode line at its top. */
+ unsigned header_line_p : 1;
+
+ /* 1 means `string' is the value of a `display' property.
+ Don't handle some `display' properties in these strings. */
+ unsigned string_from_display_prop_p : 1;
+
+ /* Display table in effect or null for none. */
+ struct Lisp_Char_Table *dp;
+
+ /* Current display table vector to return characters from and its
+ end. dpvec null means we are not returning characters from a
+ display table entry; current.dpvec_index gives the current index
+ into dpvec. This same mechanism is also used to return
+ characters from translated control characters, i.e. `\003' or
+ `^C'. */
+ Lisp_Object *dpvec, *dpend;
+
+ /* Length in bytes of the char that filled dpvec. A value of zero
+ means that no such character is involved. */
+ int dpvec_char_len;
+
+ /* Face id of the iterator saved in case a glyph from dpvec contains
+ a face. The face is restored when all glyphs from dpvec have
+ been delivered. */
+ int saved_face_id;
+
+ /* Vector of glyphs for control character translation. The pointer
+ dpvec is set to ctl_chars when a control character is translated.
+ This vector is also used for incomplete multibyte character
+ translation (e.g \222\244). Such a character is at most 4 bytes,
+ thus we need at most 16 bytes here. */
+ Lisp_Object ctl_chars[16];
+
+ /* Current buffer or string position of the iterator, including
+ position in overlay strings etc. */
+ struct display_pos current;
+
+ /* Vector of overlays to process. Overlay strings are processed
+ OVERLAY_STRING_CHUNK_SIZE at a time. */
+ #define OVERLAY_STRING_CHUNK_SIZE 3
+ Lisp_Object overlay_strings[OVERLAY_STRING_CHUNK_SIZE];
+
+ /* Total number of overlay strings to process. This can be >
+ OVERLAY_STRING_CHUNK_SIZE. */
+ int n_overlay_strings;
+
+ /* If non-nil, a Lisp string being processed. If
+ current.overlay_string_index >= 0, this is an overlay string from
+ pos. */
+ Lisp_Object string;
+
+ /* Stack of saved values. New entries are pushed when we begin to
+ process an overlay string or a string from a `glyph' property.
+ Entries are popped when we return to deliver display elements
+ from what we previously had. */
+ struct iterator_stack_entry
+ {
+ int stop_charpos;
+ int face_id;
+ Lisp_Object string;
+ struct display_pos pos;
+ int end_charpos;
+ int string_nchars;
+ enum glyph_row_area area;
+ unsigned multibyte_p : 1;
+ unsigned string_from_display_prop_p : 1;
+ unsigned display_ellipsis_p : 1;
+ Lisp_Object space_width;
+ short voffset;
+ Lisp_Object font_height;
+ }
+ stack[2];
+
+ /* Stack pointer. */
+ int sp;
+
+ /* Setting of buffer-local variable selective-display-ellipsis. */
+ unsigned selective_display_ellipsis_p : 1;
+
+ /* 1 means control characters are translated into the form `^C'
+ where the `^' can be replaced by a display table entry. */
+ unsigned ctl_arrow_p : 1;
+
+ /* -1 means selective display hides everything between a \r and the
+ next newline; > 0 means hide lines indented more than that value. */
+ int selective;
+
+ /* An enumeration describing what the next display element is
+ after a call to get_next_display_element. */
+ enum display_element_type what;
+
+ /* Face to use. */
+ int face_id;
+
+ /* Non-zero means that the current face has a box. */
+ unsigned face_box_p : 1;
+
+ /* Non-null means that the current character is the first in a run
+ of characters with box face. */
+ unsigned start_of_box_run_p : 1;
+
+ /* Non-zero means that the current character is the last in a run
+ of characters with box face. */
+ unsigned end_of_box_run_p : 1;
+
+ /* 1 means overlay strings at end_charpos have been processed. */
+ unsigned overlay_strings_at_end_processed_p : 1;
+
+ /* 1 means the actual glyph is not available in the current
+ system. */
+ unsigned glyph_not_available_p : 1;
+
+ /* 1 means the next line in display_line continues a character
+ consisting of more than one glyph, and some glyphs of this
+ character have been put on the previous line. */
+ unsigned starts_in_middle_of_char_p : 1;
+
+ /* If 1, saved_face_id contains the id of the face in front of text
+ skipped due to selective display. */
+ unsigned face_before_selective_p : 1;
+
+ /* The ID of the default face to use. One of DEFAULT_FACE_ID,
+ MODE_LINE_FACE_ID, etc, depending on what we are displaying. */
+ int base_face_id;
+
+ /* If what == IT_CHARACTER, character and length in bytes. This is
+ a character from a buffer or string. It may be different from
+ the character displayed in case that
+ unibyte_display_via_language_environment is set.
+
+ If what == IT_COMPOSITION, the first component of a composition
+ and length in bytes of the composition. */
+ int c, len;
+
+ /* If what == IT_COMPOSITION, identification number and length in
+ chars of a composition. */
+ int cmp_id, cmp_len;
+
+ /* The character to display, possibly translated to multibyte
+ if unibyte_display_via_language_environment is set. This
+ is set after produce_glyphs has been called. */
+ int char_to_display;
+
+ /* If what == IT_IMAGE, the id of the image to display. */
+ int image_id;
+
+ /* Value of the `space-width' property, if any; nil if none. */
+ Lisp_Object space_width;
+
+ /* Computed from the value of the `raise' property. */
+ short voffset;
+
+ /* Value of the `height' property, if any; nil if none. */
+ Lisp_Object font_height;
+
+ /* Object and position where the current display element came from.
+ Object can be a Lisp string in case the current display element
+ comes from an overlay string, or it is buffer. Position is
+ a position in object. */
+ Lisp_Object object;
+ struct text_pos position;
+
+ /* 1 means lines are truncated. */
+ unsigned truncate_lines_p : 1;
+
+ /* Number of columns per \t. */
+ short tab_width;
+
+ /* Width in pixels of truncation and continuation glyphs. */
+ short truncation_pixel_width, continuation_pixel_width;
+
+ /* First and last visible x-position in the display area. If window
+ is hscrolled by n columns, first_visible_x == n * FRAME_COLUMN_WIDTH
+ (f), and last_visible_x == pixel width of W + first_visible_x. */
+ int first_visible_x, last_visible_x;
+
+ /* Last visible y-position + 1 in the display area without a mode
+ line, if the window has one. */
+ int last_visible_y;
+
+ /* Additional space in pixels between lines (for window systems
+ only.) */
+ int extra_line_spacing;
+
+ /* If non-null, glyphs are produced in glyph_row with each call to
+ produce_glyphs. */
+ struct glyph_row *glyph_row;
+
+ /* The area of glyph_row to which glyphs are added. */
+ enum glyph_row_area area;
+
+ /* Number of glyphs needed for the last character requested via
+ produce_glyphs. This is 1 except for tabs. */
+ int nglyphs;
+
+ /* Width of the display element in pixels. Result of
+ produce_glyphs. */
+ int pixel_width;
+
+ /* Current, maximum logical, and maximum physical line height
+ information. Result of produce_glyphs. */
+ int ascent, descent, max_ascent, max_descent;
+ int phys_ascent, phys_descent, max_phys_ascent, max_phys_descent;
+
+ /* Current x pixel position within the display line. This value
+ does not include the width of continuation lines in front of the
+ line. The value of current_x is automatically incremented by
+ pixel_width with each call to produce_glyphs. */
+ int current_x;
+
+ /* Accumulated width of continuation lines. If > 0, this means we
+ are currently in a continuation line. This is initially zero and
+ incremented/reset by display_line, move_it_to etc. */
+ int continuation_lines_width;
+
+ /* Current y-position. Automatically incremented by the height of
+ glyph_row in move_it_to and display_line. */
+ int current_y;
+
+ /* Current vertical matrix position, or line number. Automatically
+ incremented by move_it_to and display_line. */
+ int vpos;
+
+ /* Horizontal matrix position reached in move_it_in_display_line.
+ Only set there, not in display_line. */
+ int hpos;
+ };
+
+
+ /* Access to positions of iterator IT. */
+
+ #define IT_CHARPOS(IT) CHARPOS ((IT).current.pos)
+ #define IT_BYTEPOS(IT) BYTEPOS ((IT).current.pos)
+ #define IT_STRING_CHARPOS(IT) CHARPOS ((IT).current.string_pos)
+ #define IT_STRING_BYTEPOS(IT) BYTEPOS ((IT).current.string_pos)
+
+ /* Test if IT has reached the end of its buffer or string. This will
+ only work after get_next_display_element has been called. */
+
+ #define ITERATOR_AT_END_P(IT) ((IT)->what == IT_EOB)
+
+ /* Non-zero means IT is at the end of a line. This is the case if it
+ is either on a newline or on a carriage return and selective
+ display hides the rest of the line. */
+
+ #define ITERATOR_AT_END_OF_LINE_P(IT) \
+ ((IT)->what == IT_CHARACTER \
+ && ((IT)->c == '\n' \
+ || ((IT)->c == '\r' && (IT)->selective)))
+
+ /* Call produce_glyphs or produce_glyphs_hook, if set. Shortcut to
+ avoid the function call overhead. */
+
+ #define PRODUCE_GLYPHS(IT) \
+ do { \
+ extern int inhibit_free_realized_faces; \
+ if (rif != NULL) \
+ rif->produce_glyphs ((IT)); \
+ else \
+ produce_glyphs ((IT)); \
+ if ((IT)->glyph_row != NULL) \
+ inhibit_free_realized_faces = 1; \
+ } while (0)
+
+ /* Bit-flags indicating what operation move_it_to should perform. */
+
+ enum move_operation_enum
+ {
+ /* Stop if specified x-position is reached. */
+ MOVE_TO_X = 0x01,
+
+ /* Stop if specified y-position is reached. */
+ MOVE_TO_Y = 0x02,
+
+ /* Stop if specified vpos is reached. */
+ MOVE_TO_VPOS = 0x04,
+
+ /* Stop if specified buffer or string position is reached. */
+ MOVE_TO_POS = 0x08
+ };
+
+
+
+ /***********************************************************************
+ Window-based redisplay interface
+ ***********************************************************************/
+
+ /* Structure used to describe runs of lines that must be scrolled. */
+
+ struct run
+ {
+ /* Source and destination y pixel position. */
+ int desired_y, current_y;
+
+ /* Source and destination vpos in matrix. */
+ int desired_vpos, current_vpos;
+
+ /* Height in pixels, number of glyph rows. */
+ int height, nrows;
+ };
+
+
+ /* Handlers for setting frame parameters. */
+
+ typedef void (*frame_parm_handler) P_ ((struct frame *, Lisp_Object,
Lisp_Object));
+
+
+ /* Structure holding system-dependent interface functions needed
+ for window-based redisplay. */
+
+ struct redisplay_interface
+ {
+ /* Handlers for setting frame parameters. */
+ frame_parm_handler *frame_parm_handlers;
+
+ /* Produce glyphs/get display metrics for the display element IT is
+ loaded with. */
+ void (*produce_glyphs) P_ ((struct it *it));
+
+ /* Write or insert LEN glyphs from STRING at the nominal output
+ position. */
+ void (*write_glyphs) P_ ((struct glyph *string, int len));
+ void (*insert_glyphs) P_ ((struct glyph *start, int len));
+
+ /* Clear from nominal output position to X. X < 0 means clear
+ to right end of display. */
+ void (*clear_end_of_line) P_ ((int x));
+
+ /* Function to call to scroll the display as described by RUN on
+ window W. */
+ void (*scroll_run_hook) P_ ((struct window *w, struct run *run));
+
+ /* Function to call after a line in a display has been completely
+ updated. Used to draw truncation marks and alike. DESIRED_ROW
+ is the desired row which has been updated. */
+ void (*after_update_window_line_hook) P_ ((struct glyph_row *desired_row));
+
+ /* Function to call before beginning to update window W in
+ window-based redisplay. */
+ void (*update_window_begin_hook) P_ ((struct window *w));
+
+ /* Function to call after window W has been updated in window-based
+ redisplay. CURSOR_ON_P non-zero means switch cursor on.
+ MOUSE_FACE_OVERWRITTEN_P non-zero means that some lines in W
+ that contained glyphs in mouse-face were overwritten, so we
+ have to update the mouse highlight. */
+ void (*update_window_end_hook) P_ ((struct window *w, int cursor_on_p,
+ int mouse_face_overwritten_p));
+
+ /* Move cursor to row/column position VPOS/HPOS, pixel coordinates
+ Y/X. HPOS/VPOS are window-relative row and column numbers and X/Y
+ are window-relative pixel positions. */
+ void (*cursor_to) P_ ((int vpos, int hpos, int y, int x));
+
+ /* Flush the display of frame F. For X, this is XFlush. */
+ void (*flush_display) P_ ((struct frame *f));
+
+ /* Flush the display of frame F if non-NULL. This is called
+ during redisplay, and should be NULL on systems which flushes
+ automatically before reading input. */
+ void (*flush_display_optional) P_ ((struct frame *f));
+
+ /* Clear the mouse hightlight in window W, if there is any. */
+ void (*clear_window_mouse_face) P_ ((struct window *w));
+
+ /* Set *LEFT and *RIGHT to the left and right overhang of GLYPH on
+ frame F. */
+ void (*get_glyph_overhangs) P_ ((struct glyph *glyph, struct frame *f,
+ int *left, int *right));
+
+ /* Fix the display of AREA of ROW in window W for overlapping rows.
+ This function is called from redraw_overlapping_rows after
+ desired rows have been made current. */
+ void (*fix_overlapping_area) P_ ((struct window *w, struct glyph_row *row,
+ enum glyph_row_area area));
+
+ #ifdef HAVE_WINDOW_SYSTEM
+
+ /* Draw a fringe bitmap in window W of row ROW using parameters P. */
+ void (*draw_fringe_bitmap) P_ ((struct window *w, struct glyph_row *row,
+ struct draw_fringe_bitmap_params *p));
+
+ /* Get metrics of character CHAR2B in FONT of type FONT_TYPE.
+ Value is null if CHAR2B is not contained in the font. */
+ XCharStruct * (*per_char_metric) P_ ((XFontStruct *font, XChar2b *char2b,
+ int font_type));
+
+ /* Encode CHAR2B using encoding information from FONT_INFO. CHAR2B is
+ the two-byte form of C. Encoding is returned in *CHAR2B. If
+ TWO_BYTE_P is non-null, return non-zero there if font is two-byte. */
+ int (*encode_char) P_ ((int c, XChar2b *char2b,
+ struct font_info *font_into,
+ struct charset *charset,
+ int *two_byte_p));
+
+ /* Compute left and right overhang of glyph string S.
+ A NULL pointer if platform does not support this. */
+ void (*compute_glyph_string_overhangs) P_ ((struct glyph_string *s));
+
+ /* Draw a glyph string S. */
+ void (*draw_glyph_string) P_ ((struct glyph_string *s));
+
+ /* Define cursor CURSOR on frame F. */
+ void (*define_frame_cursor) P_ ((struct frame *f, Cursor cursor));
+
+ /* Clear the area at (X,Y,WIDTH,HEIGHT) of frame F. */
+ void (*clear_frame_area) P_ ((struct frame *f, int x, int y,
+ int width, int height));
+
+ /* Draw specified cursor CURSOR_TYPE of width CURSOR_WIDTH
+ at row GLYPH_ROW on window W if ON_P is 1. If ON_P is
+ 0, don't draw cursor. If ACTIVE_P is 1, system caret
+ should track this cursor (when applicable). */
+ void (*draw_window_cursor) P_ ((struct window *w,
+ struct glyph_row *glyph_row,
+ int x, int y,
+ int cursor_type, int cursor_width,
+ int on_p, int active_p));
+
+ /* Draw vertical border for window W from (X,Y0) to (X,Y1). */
+ void (*draw_vertical_window_border) P_ ((struct window *w,
+ int x, int y0, int y1));
+
+ /* Shift display of frame F to make room for inserted glyphs.
+ The area at pixel (X,Y) of width WIDTH and height HEIGHT is
+ shifted right by SHIFT_BY pixels. */
+ void (*shift_glyphs_for_insert) P_ ((struct frame *f,
+ int x, int y, int width,
+ int height, int shift_by));
+
+ #endif /* HAVE_WINDOW_SYSTEM */
+ };
+
+ /* The current interface for window-based redisplay. */
+
+ extern struct redisplay_interface *rif;
+
+
+ /***********************************************************************
+ Images
+ ***********************************************************************/
+
+ #ifdef HAVE_WINDOW_SYSTEM
+
+ /* Structure forward declarations. */
+
+ struct image;
+
+
+ /* Each image format (JPEG, TIFF, ...) supported is described by
+ a structure of the type below. */
+
+ struct image_type
+ {
+ /* A symbol uniquely identifying the image type, .e.g `jpeg'. */
+ Lisp_Object *type;
+
+ /* Check that SPEC is a valid image specification for the given
+ image type. Value is non-zero if SPEC is valid. */
+ int (* valid_p) P_ ((Lisp_Object spec));
+
+ /* Load IMG which is used on frame F from information contained in
+ IMG->spec. Value is non-zero if successful. */
+ int (* load) P_ ((struct frame *f, struct image *img));
+
+ /* Free resources of image IMG which is used on frame F. */
+ void (* free) P_ ((struct frame *f, struct image *img));
+
+ /* Next in list of all supported image types. */
+ struct image_type *next;
+ };
+
+
+ /* Structure describing an image. Specific image formats like XBM are
+ converted into this form, so that display only has to deal with
+ this type of image. */
+
+ struct image
+ {
+ /* The time in seconds at which the image was last displayed. Set
+ in prepare_image_for_display. */
+ unsigned long timestamp;
+
+ /* Pixmaps of the image. */
+ Pixmap pixmap, mask;
+
+ /* Colors allocated for this image, if any. Allocated via xmalloc. */
+ unsigned long *colors;
+ int ncolors;
+
+ /* A single `background color' for this image, for the use of anyone that
+ cares about such a thing. Only valid if the `background_valid' field
+ is true. This should generally be accessed by calling the accessor
+ macro `IMAGE_BACKGROUND', which will heuristically calculate a value
+ if necessary. */
+ unsigned long background;
+
+ /* True if this image has a `transparent' background -- that is, is
+ uses an image mask. The accessor macro for this is
+ `IMAGE_BACKGROUND_TRANSPARENT'. */
+ unsigned background_transparent : 1;
+
+ /* True if the `background' and `background_transparent' fields are
+ valid, respectively. */
+ unsigned background_valid : 1, background_transparent_valid : 1;
+
+ /* Width and height of the image. */
+ int width, height;
+
+ /* These values are used for the rectangles displayed for images
+ that can't be loaded. */
+ #define DEFAULT_IMAGE_WIDTH 30
+ #define DEFAULT_IMAGE_HEIGHT 30
+
+ /* Percent of image height used as ascent. A value of
+ CENTERED_IMAGE_ASCENT means draw the image centered on the
+ line. */
+ int ascent;
+ #define DEFAULT_IMAGE_ASCENT 50
+ #define CENTERED_IMAGE_ASCENT -1
+
+ /* Lisp specification of this image. */
+ Lisp_Object spec;
+
+ /* Relief to draw around the image. */
+ int relief;
+
+ /* Optional margins around the image. This includes the relief. */
+ int hmargin, vmargin;
+
+ /* Reference to the type of the image. */
+ struct image_type *type;
+
+ /* 1 means that loading the image failed. Don't try again. */
+ unsigned load_failed_p;
+
+ /* A place for image types to store additional data. The member
+ data.lisp_val is marked during GC, so it's safe to store Lisp data
+ there. Image types should free this data when their `free'
+ function is called. */
+ struct
+ {
+ int int_val;
+ void *ptr_val;
+ Lisp_Object lisp_val;
+ } data;
+
+ /* Hash value of image specification to speed up comparisons. */
+ unsigned hash;
+
+ /* Image id of this image. */
+ int id;
+
+ /* Hash collision chain. */
+ struct image *next, *prev;
+ };
+
+
+ /* Cache of images. Each frame has a cache. X frames with the same
+ x_display_info share their caches. */
+
+ struct image_cache
+ {
+ /* Hash table of images. */
+ struct image **buckets;
+
+ /* Vector mapping image ids to images. */
+ struct image **images;
+
+ /* Allocated size of `images'. */
+ unsigned size;
+
+ /* Number of images in the cache. */
+ unsigned used;
+
+ /* Reference count (number of frames sharing this cache). */
+ int refcount;
+ };
+
+
+ /* Value is a pointer to the image with id ID on frame F, or null if
+ no image with that id exists. */
+
+ #define IMAGE_FROM_ID(F, ID) \
+ (((ID) >= 0 && (ID) < (FRAME_X_IMAGE_CACHE (F)->used)) \
+ ? FRAME_X_IMAGE_CACHE (F)->images[ID] \
+ : NULL)
+
+ /* Size of bucket vector of image caches. Should be prime. */
+
+ #define IMAGE_CACHE_BUCKETS_SIZE 1001
+
+ #endif /* HAVE_WINDOW_SYSTEM */
+
+
+
+ /***********************************************************************
+ Tool-bars
+ ***********************************************************************/
+
+ /* Enumeration defining where to find tool-bar item information in
+ tool-bar items vectors stored with frames. Each tool-bar item
+ occupies TOOL_BAR_ITEM_NSLOTS elements in such a vector. */
+
+ enum tool_bar_item_idx
+ {
+ /* The key of the tool-bar item. Used to remove items when a binding
+ for `undefined' is found. */
+ TOOL_BAR_ITEM_KEY,
+
+ /* Non-nil if item is enabled. */
+ TOOL_BAR_ITEM_ENABLED_P,
+
+ /* Non-nil if item is selected (pressed). */
+ TOOL_BAR_ITEM_SELECTED_P,
+
+ /* Caption. */
+ TOOL_BAR_ITEM_CAPTION,
+
+ /* Image(s) to display. This is either a single image specification
+ or a vector of specifications. */
+ TOOL_BAR_ITEM_IMAGES,
+
+ /* The binding. */
+ TOOL_BAR_ITEM_BINDING,
+
+ /* Button type. One of nil, `:radio' or `:toggle'. */
+ TOOL_BAR_ITEM_TYPE,
+
+ /* Help string. */
+ TOOL_BAR_ITEM_HELP,
+
+ /* Sentinel = number of slots in tool_bar_items occupied by one
+ tool-bar item. */
+ TOOL_BAR_ITEM_NSLOTS
+ };
+
+
+ /* An enumeration for the different images that can be specified
+ for a tool-bar item. */
+
+ enum tool_bar_item_image
+ {
+ TOOL_BAR_IMAGE_ENABLED_SELECTED,
+ TOOL_BAR_IMAGE_ENABLED_DESELECTED,
+ TOOL_BAR_IMAGE_DISABLED_SELECTED,
+ TOOL_BAR_IMAGE_DISABLED_DESELECTED
+ };
+
+ /* Margin around tool-bar buttons in pixels. */
+
+ extern Lisp_Object Vtool_bar_button_margin;
+
+ /* Thickness of relief to draw around tool-bar buttons. */
+
+ extern EMACS_INT tool_bar_button_relief;
+
+ /* Default values of the above variables. */
+
+ #define DEFAULT_TOOL_BAR_BUTTON_MARGIN 4
+ #define DEFAULT_TOOL_BAR_BUTTON_RELIEF 1
+
+ /* The height in pixels of the default tool-bar images. */
+
+ #define DEFAULT_TOOL_BAR_IMAGE_HEIGHT 24
+
+
+ /***********************************************************************
+ Terminal Capabilities
+ ***********************************************************************/
+
+ /* Each of these is a bit representing a terminal `capability' (bold,
+ inverse, etc). They are or'd together to specify the set of
+ capabilities being queried for when calling `tty_capable_p' (which
+ returns true if the terminal supports all of them). */
+
+ #define TTY_CAP_INVERSE 0x01
+ #define TTY_CAP_UNDERLINE 0x02
+ #define TTY_CAP_BOLD 0x04
+ #define TTY_CAP_DIM 0x08
+ #define TTY_CAP_BLINK 0x10
+ #define TTY_CAP_ALT_CHARSET 0x20
+
+
+ /***********************************************************************
+ Function Prototypes
+ ***********************************************************************/
+
+ /* Defined in xdisp.c */
+
+ struct glyph_row *row_containing_pos P_ ((struct window *, int,
+ struct glyph_row *,
+ struct glyph_row *, int));
+ int string_buffer_position P_ ((struct window *, Lisp_Object, int));
+ int line_bottom_y P_ ((struct it *));
+ int display_prop_intangible_p P_ ((Lisp_Object));
+ void resize_echo_area_exactly P_ ((void));
+ int resize_mini_window P_ ((struct window *, int));
+ int try_window P_ ((Lisp_Object, struct text_pos));
+ void window_box P_ ((struct window *, int, int *, int *, int *, int *));
+ int window_box_height P_ ((struct window *));
+ int window_text_bottom_y P_ ((struct window *));
+ int window_box_width P_ ((struct window *, int));
+ int window_box_left P_ ((struct window *, int));
+ int window_box_right P_ ((struct window *, int));
+ void window_box_edges P_ ((struct window *, int, int *, int *, int *, int *));
+ int estimate_mode_line_height P_ ((struct frame *, enum face_id));
+ void pixel_to_glyph_coords P_ ((struct frame *, int, int, int *, int *,
+ NativeRectangle *, int));
+ int glyph_to_pixel_coords P_ ((struct window *, int, int, int *, int *));
+ void mark_window_display_accurate P_ ((Lisp_Object, int));
+ void redisplay_preserve_echo_area P_ ((int));
+ void set_cursor_from_row P_ ((struct window *, struct glyph_row *,
+ struct glyph_matrix *, int, int, int, int));
+ void init_iterator P_ ((struct it *, struct window *, int,
+ int, struct glyph_row *, enum face_id));
+ void init_iterator_to_row_start P_ ((struct it *, struct window *,
+ struct glyph_row *));
+ int get_next_display_element P_ ((struct it *));
+ void set_iterator_to_next P_ ((struct it *, int));
+ void produce_glyphs P_ ((struct it *));
+ void produce_special_glyphs P_ ((struct it *, enum display_element_type));
+ void start_display P_ ((struct it *, struct window *, struct text_pos));
+ void move_it_to P_ ((struct it *, int, int, int, int, int));
+ void move_it_vertically P_ ((struct it *, int));
+ void move_it_vertically_backward P_ ((struct it *, int));
+ void move_it_by_lines P_ ((struct it *, int, int));
+ void move_it_past_eol P_ ((struct it *));
+ int in_display_vector_p P_ ((struct it *));
+ int frame_mode_line_height P_ ((struct frame *));
+ void highlight_trailing_whitespace P_ ((struct frame *, struct glyph_row *));
+ void draw_row_fringe_bitmaps P_ ((struct window *, struct glyph_row *));
+ void compute_fringe_widths P_ ((struct frame *, int));
+ extern Lisp_Object Qtool_bar;
+ extern Lisp_Object Vshow_trailing_whitespace;
+ extern int mode_line_in_non_selected_windows;
+ extern int redisplaying_p;
+ extern Lisp_Object Vimage_types;
+ extern void add_to_log P_ ((char *, Lisp_Object, Lisp_Object));
+ extern int help_echo_showing_p;
+ extern int current_mode_line_height, current_header_line_height;
+ extern Lisp_Object help_echo_string, help_echo_window;
+ extern Lisp_Object help_echo_object, previous_help_echo_string;
+ extern int help_echo_pos;
+ extern struct frame *last_mouse_frame;
+ extern int last_tool_bar_item;
+ extern int mouse_autoselect_window;
+
+ #ifdef HAVE_WINDOW_SYSTEM
+
+ #if GLYPH_DEBUG
+ extern void dump_glyph_string P_ ((struct glyph_string *));
+ #endif
+
+ extern void x_get_glyph_overhangs P_ ((struct glyph *, struct frame *,
+ int *, int *));
+ extern void x_produce_glyphs P_ ((struct it *));
+
+ extern void x_write_glyphs P_ ((struct glyph *, int));
+ extern void x_insert_glyphs P_ ((struct glyph *, int len));
+ extern void x_clear_end_of_line P_ ((int));
+
+ extern int x_stretch_cursor_p;
+ extern struct cursor_pos output_cursor;
+
+ extern void x_fix_overlapping_area P_ ((struct window *, struct glyph_row *,
+ enum glyph_row_area));
+ extern void draw_phys_cursor_glyph P_ ((struct window *,
+ struct glyph_row *,
+ enum draw_glyphs_face));
+ extern void erase_phys_cursor P_ ((struct window *));
+ extern void display_and_set_cursor P_ ((struct window *,
+ int, int, int, int, int));
+
+ extern void set_output_cursor P_ ((struct cursor_pos *));
+ extern void x_cursor_to P_ ((int, int, int, int));
+
+ extern void x_update_cursor P_ ((struct frame *, int));
+ extern void x_clear_cursor P_ ((struct window *));
+ extern void x_draw_vertical_border P_ ((struct window *w));
+
+ extern void frame_to_window_pixel_xy P_ ((struct window *, int *, int *));
+ extern void get_glyph_string_clip_rect P_ ((struct glyph_string *,
+ NativeRectangle *nr));
+ extern void note_mouse_highlight P_ ((struct frame *, int, int));
+ extern void x_clear_window_mouse_face P_ ((struct window *));
+ extern void cancel_mouse_face P_ ((struct frame *));
+
+ extern void handle_tool_bar_click P_ ((struct frame *,
+ int, int, int, unsigned int));
+
+ /* msdos.c defines its own versions of these functions. */
+ extern int clear_mouse_face P_ ((Display_Info *));
+ extern void show_mouse_face P_ ((Display_Info *, enum draw_glyphs_face));
+ extern int cursor_in_mouse_face_p P_ ((struct window *w));
+
+ extern void expose_frame P_ ((struct frame *, int, int, int, int));
+ extern int x_intersect_rectangles P_ ((XRectangle *, XRectangle *,
+ XRectangle *));
+ #endif
+
+ /* Defined in sysdep.c */
+
+ void get_frame_size P_ ((int *, int *));
+ void request_sigio P_ ((void));
+ void unrequest_sigio P_ ((void));
+ int tabs_safe_p P_ ((void));
+ void init_baud_rate P_ ((void));
+ void init_sigio P_ ((int));
+
+ /* Defined in xfaces.c */
+
+ #ifdef HAVE_X_WINDOWS
+ void x_free_colors P_ ((struct frame *, unsigned long *, int));
+ #endif
+
+ void update_face_from_frame_parameter P_ ((struct frame *, Lisp_Object,
+ Lisp_Object));
+ Lisp_Object tty_color_name P_ ((struct frame *, int));
+ void clear_face_cache P_ ((int));
+ unsigned long load_color P_ ((struct frame *, struct face *, Lisp_Object,
+ enum lface_attribute_index));
+ void unload_color P_ ((struct frame *, unsigned long));
+ char *choose_face_font P_ ((struct frame *, Lisp_Object *, Lisp_Object,
+ int *));
+ int ascii_face_of_lisp_face P_ ((struct frame *, int));
+ void prepare_face_for_display P_ ((struct frame *, struct face *));
+ int xstricmp P_ ((const unsigned char *, const unsigned char *));
+ int lookup_face P_ ((struct frame *, Lisp_Object *));
+ int lookup_non_ascii_face P_ ((struct frame *, int, struct face *));
+ int lookup_named_face P_ ((struct frame *, Lisp_Object));
+ int smaller_face P_ ((struct frame *, int, int));
+ int face_with_height P_ ((struct frame *, int, int));
+ int lookup_derived_face P_ ((struct frame *, Lisp_Object, int));
+ void init_frame_faces P_ ((struct frame *));
+ void free_frame_faces P_ ((struct frame *));
+ void recompute_basic_faces P_ ((struct frame *));
+ int face_at_buffer_position P_ ((struct window *, int, int, int, int *,
+ int, int));
+ int face_at_string_position P_ ((struct window *, Lisp_Object, int, int, int,
+ int, int *, enum face_id, int));
+ int compute_char_face P_ ((struct frame *, int, Lisp_Object));
+ void free_all_realized_faces P_ ((Lisp_Object));
+ void free_realized_face P_ ((struct frame *, struct face *));
+ extern Lisp_Object Qforeground_color, Qbackground_color;
+ extern char unspecified_fg[], unspecified_bg[];
+ extern Lisp_Object split_font_name_into_vector P_ ((Lisp_Object));
+ extern Lisp_Object build_font_name_from_vector P_ ((Lisp_Object));
+
+ /* Defined in xfns.c */
+
+ #ifdef HAVE_X_WINDOWS
+ void gamma_correct P_ ((struct frame *, XColor *));
+ #endif
+ #ifdef WINDOWSNT
+ void gamma_correct P_ ((struct frame *, COLORREF *));
+ #endif
+
+ #ifdef HAVE_WINDOW_SYSTEM
+
+ void x_kill_gs_process P_ ((Pixmap, struct frame *));
+ int x_screen_planes P_ ((struct frame *));
+ void x_implicitly_set_name P_ ((struct frame *, Lisp_Object, Lisp_Object));
+ struct image_cache *make_image_cache P_ ((void));
+ void free_image_cache P_ ((struct frame *));
+ void clear_image_cache P_ ((struct frame *, int));
+ void forall_images_in_image_cache P_ ((struct frame *,
+ void (*) P_ ((struct image *))));
+ int valid_image_p P_ ((Lisp_Object));
+ void prepare_image_for_display P_ ((struct frame *, struct image *));
+ int lookup_image P_ ((struct frame *, Lisp_Object));
+
+ #ifdef HAVE_X_WINDOWS
+ unsigned long image_background P_ ((struct image *, struct frame *,
+ XImage *ximg));
+ int image_background_transparent P_ ((struct image *, struct frame *,
+ XImage *mask));
+ #endif /* HAVE_X_WINDOWS */
+
+ extern Lisp_Object tip_frame;
+ extern Window tip_window;
+ EXFUN (Fx_show_tip, 6);
+ EXFUN (Fx_hide_tip, 0);
+ extern void start_hourglass P_ ((void));
+ extern void cancel_hourglass P_ ((void));
+ extern int display_hourglass_p;
+
+ /* Returns the background color of IMG, calculating one heuristically if
+ necessary. If non-zero, XIMG is an existing XImage object to use for
+ the heuristic. */
+
+ #define IMAGE_BACKGROUND(img, f, ximg)
\
+ ((img)->background_valid \
+ ? (img)->background
\
+ : image_background (img, f, ximg))
+
+ /* Returns true if IMG has a `transparent' background, using heuristics
+ to decide if necessary. If non-zero, MASK is an existing XImage
+ object to use for the heuristic. */
+
+ #define IMAGE_BACKGROUND_TRANSPARENT(img, f, mask) \
+ ((img)->background_transparent_valid
\
+ ? (img)->background_transparent \
+ : image_background_transparent (img, f, mask))
+
+ #endif /* HAVE_WINDOW_SYSTEM */
+
+
+ /* Defined in xmenu.c */
+
+ int popup_activated P_ ((void));
+
+ /* Defined in dispnew.c */
+
+ extern int inverse_video;
+ extern int required_matrix_width P_ ((struct window *));
+ extern int required_matrix_height P_ ((struct window *));
+ extern Lisp_Object mode_line_string P_ ((struct window *, int, int,
+ enum window_part, int *));
+ extern Lisp_Object marginal_area_string P_ ((struct window *, int, int,
+ enum window_part, int *));
+ extern void redraw_frame P_ ((struct frame *));
+ extern void redraw_garbaged_frames P_ ((void));
+ extern void cancel_line P_ ((int, struct frame *));
+ extern void init_desired_glyphs P_ ((struct frame *));
+ extern int scroll_frame_lines P_ ((struct frame *, int, int, int, int));
+ extern int direct_output_for_insert P_ ((int));
+ extern int direct_output_forward_char P_ ((int));
+ extern int update_frame P_ ((struct frame *, int, int));
+ extern int scrolling P_ ((struct frame *));
+ extern void bitch_at_user P_ ((void));
+ void adjust_glyphs P_ ((struct frame *));
+ void free_glyphs P_ ((struct frame *));
+ void free_window_matrices P_ ((struct window *));
+ void check_glyph_memory P_ ((void));
+ void mirrored_line_dance P_ ((struct glyph_matrix *, int, int, int *, char
*));
+ void clear_glyph_matrix P_ ((struct glyph_matrix *));
+ void clear_current_matrices P_ ((struct frame *f));
+ void clear_desired_matrices P_ ((struct frame *));
+ void shift_glyph_matrix P_ ((struct window *, struct glyph_matrix *,
+ int, int, int));
+ void rotate_matrix P_ ((struct glyph_matrix *, int, int, int));
+ void increment_matrix_positions P_ ((struct glyph_matrix *,
+ int, int, int, int));
+ void blank_row P_ ((struct window *, struct glyph_row *, int));
+ void increment_row_positions P_ ((struct glyph_row *, int, int));
+ void enable_glyph_matrix_rows P_ ((struct glyph_matrix *, int, int, int));
+ void clear_glyph_row P_ ((struct glyph_row *));
+ void prepare_desired_row P_ ((struct glyph_row *));
+ int line_hash_code P_ ((struct glyph_row *));
+ void set_window_update_flags P_ ((struct window *, int));
+ void write_glyphs P_ ((struct glyph *, int));
+ void insert_glyphs P_ ((struct glyph *, int));
+ void redraw_frame P_ ((struct frame *));
+ void redraw_garbaged_frames P_ ((void));
+ int scroll_cost P_ ((struct frame *, int, int, int));
+ int direct_output_for_insert P_ ((int));
+ int direct_output_forward_char P_ ((int));
+ int update_frame P_ ((struct frame *, int, int));
+ void update_single_window P_ ((struct window *, int));
+ int scrolling P_ ((struct frame *));
+ void buffer_posn_from_coords P_ ((struct window *, int *, int *,
+ Lisp_Object *, struct display_pos *));
+ void do_pending_window_change P_ ((int));
+ void change_frame_size P_ ((struct frame *, int, int, int, int, int));
+ void bitch_at_user P_ ((void));
+ Lisp_Object sit_for P_ ((int, int, int, int, int));
+ void init_display P_ ((void));
+ void syms_of_display P_ ((void));
+ extern Lisp_Object Qredisplay_dont_pause;
+
+ /* Defined in term.c */
+
+ extern void ring_bell P_ ((void));
+ extern void set_terminal_modes P_ ((void));
+ extern void reset_terminal_modes P_ ((void));
+ extern void update_begin P_ ((struct frame *));
+ extern void update_end P_ ((struct frame *));
+ extern void set_terminal_window P_ ((int));
+ extern void set_scroll_region P_ ((int, int));
+ extern void turn_off_insert P_ ((void));
+ extern void turn_off_highlight P_ ((void));
+ extern void background_highlight P_ ((void));
+ extern void clear_frame P_ ((void));
+ extern void clear_end_of_line P_ ((int));
+ extern void clear_end_of_line_raw P_ ((int));
+ extern void delete_glyphs P_ ((int));
+ extern void ins_del_lines P_ ((int, int));
+ extern int string_cost P_ ((char *));
+ extern int per_line_cost P_ ((char *));
+ extern void calculate_costs P_ ((struct frame *));
+ extern void set_tty_color_mode P_ ((struct frame *, Lisp_Object));
+ extern void tty_setup_colors P_ ((int));
+ extern void term_init P_ ((char *));
+ extern void fatal P_ ((/* char *, ... */));
+ void cursor_to P_ ((int, int));
+ extern int tty_capable_p P_ ((struct frame *, unsigned, unsigned long,
unsigned long));
+
+ /* Defined in scroll.c */
+
+ extern int scrolling_max_lines_saved P_ ((int, int, int *, int *, int *));
+ extern int scroll_cost P_ ((struct frame *, int, int, int));
+ extern void do_line_insertion_deletion_costs P_ ((struct frame *, char *,
+ char *, char *, char *,
+ char *, char *, int));
+ void scrolling_1 P_ ((struct frame *, int, int, int, int *, int *, int *,
+ int *, int));
+
+ /* Defined in frame.c */
+
+ #ifdef HAVE_WINDOW_SYSTEM
+
+ /* Types we might convert a resource string into. */
+ enum resource_types
+ {
+ RES_TYPE_NUMBER,
+ RES_TYPE_FLOAT,
+ RES_TYPE_BOOLEAN,
+ RES_TYPE_STRING,
+ RES_TYPE_SYMBOL
+ };
+
+ extern Lisp_Object x_get_arg P_ ((Display_Info *, Lisp_Object,
+ Lisp_Object, char *, char *class,
+ enum resource_types));
+ extern Lisp_Object x_frame_get_arg P_ ((struct frame *, Lisp_Object,
+ Lisp_Object, char *, char *,
+ enum resource_types));
+ extern Lisp_Object x_frame_get_and_record_arg P_ ((
+ struct frame *, Lisp_Object,
+ Lisp_Object, char *, char *,
+ enum resource_types));
+ extern Lisp_Object x_default_parameter P_ ((struct frame *, Lisp_Object,
+ Lisp_Object, Lisp_Object,
+ char *, char *,
+ enum resource_types));
+
+ #endif /* HAVE_WINDOW_SYSTEM */
+
+ #endif /* not DISPEXTERN_H_INCLUDED */
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