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Diffstat (limited to 'src/dispnew.c')
| -rw-r--r-- | src/dispnew.c | 2619 |
1 files changed, 0 insertions, 2619 deletions
diff --git a/src/dispnew.c b/src/dispnew.c deleted file mode 100644 index 388bae255ac..00000000000 --- a/src/dispnew.c +++ /dev/null @@ -1,2619 +0,0 @@ -/* Updating of data structures for redisplay. - Copyright (C) 1985, 86, 87, 88, 93, 94, 95 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. */ - - -#include <signal.h> - -#include <config.h> - -#include <stdio.h> -#include <ctype.h> - -#include "lisp.h" -#include "termchar.h" -#include "termopts.h" -#include "termhooks.h" -/* cm.h must come after dispextern.h on Windows. */ -#include "dispextern.h" -#include "cm.h" -#include "buffer.h" -#include "frame.h" -#include "window.h" -#include "commands.h" -#include "disptab.h" -#include "indent.h" -#include "intervals.h" -#include "blockinput.h" - -#include "systty.h" -#include "syssignal.h" - -#ifdef HAVE_X_WINDOWS -#include "xterm.h" -#endif /* HAVE_X_WINDOWS */ - -#ifdef HAVE_NTGUI -#include "w32term.h" -#endif /* HAVE_NTGUI */ - -/* Include systime.h after xterm.h to avoid double inclusion of time.h. */ -#include "systime.h" - -#include <errno.h> - -#define max(a, b) ((a) > (b) ? (a) : (b)) -#define min(a, b) ((a) < (b) ? (a) : (b)) - -/* Get number of chars of output now in the buffer of a stdio stream. - This ought to be built in in stdio, but it isn't. - Some s- files override this because their stdio internals differ. */ -#ifdef __GNU_LIBRARY__ -/* The s- file might have overridden the definition with one that works for - the system's C library. But we are using the GNU C library, so this is - the right definition for every system. */ -#ifdef GNU_LIBRARY_PENDING_OUTPUT_COUNT -#define PENDING_OUTPUT_COUNT GNU_LIBRARY_PENDING_OUTPUT_COUNT -#else -#undef PENDING_OUTPUT_COUNT -#define PENDING_OUTPUT_COUNT(FILE) ((FILE)->__bufp - (FILE)->__buffer) -#endif -#else /* not __GNU_LIBRARY__ */ -#ifndef PENDING_OUTPUT_COUNT -#define PENDING_OUTPUT_COUNT(FILE) ((FILE)->_ptr - (FILE)->_base) -#endif -#endif - -static void change_frame_size_1 (); - -/* Nonzero upon entry to redisplay means do not assume anything about - current contents of actual terminal frame; clear and redraw it. */ - -int frame_garbaged; - -/* Nonzero means last display completed. Zero means it was preempted. */ - -int display_completed; - -/* Lisp variable visible-bell; enables use of screen-flash - instead of audible bell. */ - -int visible_bell; - -/* Invert the color of the whole frame, at a low level. */ - -int inverse_video; - -/* Line speed of the terminal. */ - -int baud_rate; - -/* nil or a symbol naming the window system under which emacs is - running ('x is the only current possibility). */ - -Lisp_Object Vwindow_system; - -/* Version number of X windows: 10, 11 or nil. */ -Lisp_Object Vwindow_system_version; - -/* Vector of glyph definitions. Indexed by glyph number, - the contents are a string which is how to output the glyph. - - If Vglyph_table is nil, a glyph is output by using its low 8 bits - as a character code. */ - -Lisp_Object Vglyph_table; - -/* Display table to use for vectors that don't specify their own. */ - -Lisp_Object Vstandard_display_table; - -/* Nonzero means reading single-character input with prompt - so put cursor on minibuffer after the prompt. - positive means at end of text in echo area; - negative means at beginning of line. */ -int cursor_in_echo_area; - -Lisp_Object Qdisplay_table; - -/* The currently selected frame. - In a single-frame version, this variable always holds the address of - the_only_frame. */ - -FRAME_PTR selected_frame; - -/* A frame which is not just a minibuffer, or 0 if there are no such - frames. This is usually the most recent such frame that was - selected. In a single-frame version, this variable always holds - the address of the_only_frame. */ -FRAME_PTR last_nonminibuf_frame; - -/* This is a vector, made larger whenever it isn't large enough, - which is used inside `update_frame' to hold the old contents - of the FRAME_PHYS_LINES of the frame being updated. */ -struct frame_glyphs **ophys_lines; -/* Length of vector currently allocated. */ -int ophys_lines_length; - -FILE *termscript; /* Stdio stream being used for copy of all output. */ - -struct cm Wcm; /* Structure for info on cursor positioning */ - -int delayed_size_change; /* 1 means SIGWINCH happened when not safe. */ - -DEFUN ("redraw-frame", Fredraw_frame, Sredraw_frame, 1, 1, 0, - "Clear frame FRAME and output again what is supposed to appear on it.") - (frame) - Lisp_Object frame; -{ - FRAME_PTR f; - - CHECK_LIVE_FRAME (frame, 0); - f = XFRAME (frame); - update_begin (f); - if (FRAME_MSDOS_P (f)) - set_terminal_modes (); - clear_frame (); - clear_frame_records (f); - update_end (f); - fflush (stdout); - windows_or_buffers_changed++; - /* Mark all windows as INaccurate, - so that every window will have its redisplay done. */ - mark_window_display_accurate (FRAME_ROOT_WINDOW (f), 0); - f->garbaged = 0; - return Qnil; -} - -redraw_frame (f) - FRAME_PTR f; -{ - Lisp_Object frame; - XSETFRAME (frame, f); - Fredraw_frame (frame); -} - -DEFUN ("redraw-display", Fredraw_display, Sredraw_display, 0, 0, "", - "Clear and redisplay all visible frames.") - () -{ - Lisp_Object tail, frame; - - FOR_EACH_FRAME (tail, frame) - if (FRAME_VISIBLE_P (XFRAME (frame))) - Fredraw_frame (frame); - - return Qnil; -} - -/* This is used when frame_garbaged is set. - Redraw the individual frames marked as garbaged. */ - -void -redraw_garbaged_frames () -{ - Lisp_Object tail, frame; - - FOR_EACH_FRAME (tail, frame) - if (FRAME_VISIBLE_P (XFRAME (frame)) - && FRAME_GARBAGED_P (XFRAME (frame))) - Fredraw_frame (frame); -} - - -static struct frame_glyphs * -make_frame_glyphs (frame, empty) - register FRAME_PTR frame; - int empty; -{ - register int i; - register width = FRAME_WINDOW_WIDTH (frame); - register height = FRAME_HEIGHT (frame); - register struct frame_glyphs *new - = (struct frame_glyphs *) xmalloc (sizeof (struct frame_glyphs)); - - SET_GLYPHS_FRAME (new, frame); - new->height = height; - new->width = width; - new->used = (int *) xmalloc (height * sizeof (int)); - new->glyphs = (GLYPH **) xmalloc (height * sizeof (GLYPH *)); - new->charstarts = (int **) xmalloc (height * sizeof (int *)); - new->highlight = (char *) xmalloc (height * sizeof (char)); - new->enable = (char *) xmalloc (height * sizeof (char)); - bzero (new->enable, height * sizeof (char)); - new->bufp = (int *) xmalloc (height * sizeof (int)); - -#ifdef HAVE_WINDOW_SYSTEM - if (FRAME_WINDOW_P (frame)) - { - new->top_left_x = (short *) xmalloc (height * sizeof (short)); - new->top_left_y = (short *) xmalloc (height * sizeof (short)); - new->pix_width = (short *) xmalloc (height * sizeof (short)); - new->pix_height = (short *) xmalloc (height * sizeof (short)); - new->max_ascent = (short *) xmalloc (height * sizeof (short)); - } -#endif /* HAVE_WINDOW_SYSTEM */ - - if (empty) - { - /* Make the buffer used by decode_mode_spec. This buffer is also - used as temporary storage when updating the frame. See scroll.c. */ - unsigned int total_glyphs = (width + 2) * sizeof (GLYPH); - unsigned int total_charstarts = (width + 2) * sizeof (int); - - new->total_contents = (GLYPH *) xmalloc (total_glyphs); - bzero (new->total_contents, total_glyphs); - - new->total_charstarts = (int *) xmalloc (total_charstarts); - bzero (new->total_charstarts, total_charstarts); - } - else - { - unsigned int total_glyphs = height * (width + 2) * sizeof (GLYPH); - - new->total_contents = (GLYPH *) xmalloc (total_glyphs); - bzero (new->total_contents, total_glyphs); - for (i = 0; i < height; i++) - new->glyphs[i] = new->total_contents + i * (width + 2) + 1; - - if (!FRAME_TERMCAP_P (frame)) - { - unsigned int total_charstarts = height * (width + 2) * sizeof (int); - - new->total_charstarts = (int *) xmalloc (total_charstarts); - bzero (new->total_charstarts, total_charstarts); - for (i = 0; i < height; i++) - new->charstarts[i] = new->total_charstarts + i * (width + 2) + 1; - } - else - { - /* Without a window system, we don't really need charstarts. - So use a small amount of space to make enough data structure - to prevent crashes in display_text_line. */ - new->total_charstarts = (int *) xmalloc ((width + 2) * sizeof (int)); - for (i = 0; i < height; i++) - new->charstarts[i] = new->total_charstarts; - } - } - - return new; -} - -void -free_frame_glyphs (frame, glyphs) - FRAME_PTR frame; - struct frame_glyphs *glyphs; -{ - if (glyphs->total_contents) - xfree (glyphs->total_contents); - if (glyphs->total_charstarts) - xfree (glyphs->total_charstarts); - - xfree (glyphs->used); - xfree (glyphs->glyphs); - xfree (glyphs->highlight); - xfree (glyphs->enable); - xfree (glyphs->bufp); - if (glyphs->charstarts) - xfree (glyphs->charstarts); - -#ifdef HAVE_WINDOW_SYSTEM - if (FRAME_WINDOW_P (frame)) - { - xfree (glyphs->top_left_x); - xfree (glyphs->top_left_y); - xfree (glyphs->pix_width); - xfree (glyphs->pix_height); - xfree (glyphs->max_ascent); - } -#endif /* HAVE_WINDOW_SYSTEM */ - - xfree (glyphs); -} - -void -remake_frame_glyphs (frame) - FRAME_PTR frame; -{ - if (FRAME_CURRENT_GLYPHS (frame)) - free_frame_glyphs (frame, FRAME_CURRENT_GLYPHS (frame)); - if (FRAME_DESIRED_GLYPHS (frame)) - free_frame_glyphs (frame, FRAME_DESIRED_GLYPHS (frame)); - if (FRAME_TEMP_GLYPHS (frame)) - free_frame_glyphs (frame, FRAME_TEMP_GLYPHS (frame)); - - if (FRAME_MESSAGE_BUF (frame)) - { - /* Reallocate the frame's message buffer; remember that - echo_area_glyphs may be pointing here. */ - char *old_message_buf = FRAME_MESSAGE_BUF (frame); - - FRAME_MESSAGE_BUF (frame) - = (char *) xrealloc (FRAME_MESSAGE_BUF (frame), - FRAME_WIDTH (frame) + 1); - - if (echo_area_glyphs == old_message_buf) - echo_area_glyphs = FRAME_MESSAGE_BUF (frame); - if (previous_echo_glyphs == old_message_buf) - previous_echo_glyphs = FRAME_MESSAGE_BUF (frame); - } - else - FRAME_MESSAGE_BUF (frame) - = (char *) xmalloc (FRAME_WIDTH (frame) + 1); - - FRAME_CURRENT_GLYPHS (frame) = make_frame_glyphs (frame, 0); - FRAME_DESIRED_GLYPHS (frame) = make_frame_glyphs (frame, 0); - FRAME_TEMP_GLYPHS (frame) = make_frame_glyphs (frame, 1); - if (FRAME_WINDOW_P (frame) || frame == selected_frame) - SET_FRAME_GARBAGED (frame); -} - -/* Return the hash code of contents of line VPOS in frame-matrix M. */ - -static int -line_hash_code (m, vpos) - register struct frame_glyphs *m; - int vpos; -{ - register GLYPH *body, *end; - register int h = 0; - - if (!m->enable[vpos]) - return 0; - - /* Give all highlighted lines the same hash code - so as to encourage scrolling to leave them in place. */ - if (m->highlight[vpos]) - return -1; - - body = m->glyphs[vpos]; - - if (must_write_spaces) - while (1) - { - GLYPH g = *body++; - - if (g == 0) - break; - h = (((h << 4) + (h >> 24)) & 0x0fffffff) + g - SPACEGLYPH; - } - else - while (1) - { - GLYPH g = *body++; - - if (g == 0) - break; - h = (((h << 4) + (h >> 24)) & 0x0fffffff) + g; - } - - if (h) - return h; - return 1; -} - -/* Return number of characters in line in M at vpos VPOS, - except don't count leading and trailing spaces - unless the terminal requires those to be explicitly output. */ - -static unsigned int -line_draw_cost (m, vpos) - struct frame_glyphs *m; - int vpos; -{ - register GLYPH *beg = m->glyphs[vpos]; - register GLYPH *end = m->glyphs[vpos] + m->used[vpos]; - register int i; - register int tlen = GLYPH_TABLE_LENGTH; - register Lisp_Object *tbase = GLYPH_TABLE_BASE; - - /* Ignore trailing and leading spaces if we can. */ - if (!must_write_spaces) - { - while ((end != beg) && (*end == SPACEGLYPH)) - --end; - if (end == beg) - return (0); /* All blank line. */ - - while (*beg == SPACEGLYPH) - ++beg; - } - - /* If we don't have a glyph-table, each glyph is one character, - so return the number of glyphs. */ - if (tbase == 0) - return end - beg; - - /* Otherwise, scan the glyphs and accumulate their total size in I. */ - i = 0; - while ((beg <= end) && *beg) - { - register GLYPH g = *beg++; - - if (GLYPH_SIMPLE_P (tbase, tlen, g)) - i += 1; - else - i += GLYPH_LENGTH (tbase, g); - } - return i; -} - -/* The functions on this page are the interface from xdisp.c to redisplay. - - The only other interface into redisplay is through setting - FRAME_CURSOR_X (frame) and FRAME_CURSOR_Y (frame) - and SET_FRAME_GARBAGED (frame). */ - -/* cancel_line eliminates any request to display a line at position `vpos' */ - -cancel_line (vpos, frame) - int vpos; - register FRAME_PTR frame; -{ - FRAME_DESIRED_GLYPHS (frame)->enable[vpos] = 0; -} - -clear_frame_records (frame) - register FRAME_PTR frame; -{ - bzero (FRAME_CURRENT_GLYPHS (frame)->enable, FRAME_HEIGHT (frame)); -} - -/* Clear out all display lines for a coming redisplay. */ - -void -init_desired_glyphs (frame) - register FRAME_PTR frame; -{ - register struct frame_glyphs *desired_glyphs = FRAME_DESIRED_GLYPHS (frame); - int vpos; - int height = FRAME_HEIGHT (frame); - - for (vpos = 0; vpos < height; vpos++) - desired_glyphs->enable[vpos] = 0; -} - -/* Prepare to display on line VPOS starting at HPOS within it. */ - -void -get_display_line (frame, vpos, hpos) - register FRAME_PTR frame; - int vpos; - register int hpos; -{ - register struct frame_glyphs *glyphs; - register struct frame_glyphs *desired_glyphs = FRAME_DESIRED_GLYPHS (frame); - register GLYPH *p; - - if (vpos < 0) - abort (); - - if (! desired_glyphs->enable[vpos]) - { - desired_glyphs->used[vpos] = 0; - desired_glyphs->highlight[vpos] = 0; - desired_glyphs->enable[vpos] = 1; - } - - if (hpos > desired_glyphs->used[vpos]) - { - GLYPH *g = desired_glyphs->glyphs[vpos] + desired_glyphs->used[vpos]; - GLYPH *end = desired_glyphs->glyphs[vpos] + hpos; - - desired_glyphs->used[vpos] = hpos; - while (g != end) - *g++ = SPACEGLYPH; - } -} - -/* Like bcopy except never gets confused by overlap. */ - -void -safe_bcopy (from, to, size) - char *from, *to; - int size; -{ - if (size <= 0 || from == to) - return; - - /* If the source and destination don't overlap, then bcopy can - handle it. If they do overlap, but the destination is lower in - memory than the source, we'll assume bcopy can handle that. */ - if (to < from || from + size <= to) - bcopy (from, to, size); - - /* Otherwise, we'll copy from the end. */ - else - { - register char *endf = from + size; - register char *endt = to + size; - - /* If TO - FROM is large, then we should break the copy into - nonoverlapping chunks of TO - FROM bytes each. However, if - TO - FROM is small, then the bcopy function call overhead - makes this not worth it. The crossover point could be about - anywhere. Since I don't think the obvious copy loop is too - bad, I'm trying to err in its favor. */ - if (to - from < 64) - { - do - *--endt = *--endf; - while (endf != from); - } - else - { - for (;;) - { - endt -= (to - from); - endf -= (to - from); - - if (endt < to) - break; - - bcopy (endf, endt, to - from); - } - - /* If SIZE wasn't a multiple of TO - FROM, there will be a - little left over. The amount left over is - (endt + (to - from)) - to, which is endt - from. */ - bcopy (from, to, endt - from); - } - } -} - -/* Rotate a vector of SIZE bytes right, by DISTANCE bytes. - DISTANCE may be negative. */ - -static void -rotate_vector (vector, size, distance) - char *vector; - int size; - int distance; -{ - char *temp = (char *) alloca (size); - - if (distance < 0) - distance += size; - - bcopy (vector, temp + distance, size - distance); - bcopy (vector + size - distance, temp, distance); - bcopy (temp, vector, size); -} - -/* Scroll lines from vpos FROM up to but not including vpos END - down by AMOUNT lines (AMOUNT may be negative). - Returns nonzero if done, zero if terminal cannot scroll them. */ - -int -scroll_frame_lines (frame, from, end, amount, newpos) - register FRAME_PTR frame; - int from, end, amount, newpos; -{ - register int i; - register struct frame_glyphs *current_frame - = FRAME_CURRENT_GLYPHS (frame); - int pos_adjust; - int width = FRAME_WINDOW_WIDTH (frame); - - if (!line_ins_del_ok) - return 0; - - if (amount == 0) - return 1; - - if (amount > 0) - { - update_begin (frame); - set_terminal_window (end + amount); - if (!scroll_region_ok) - ins_del_lines (end, -amount); - ins_del_lines (from, amount); - set_terminal_window (0); - - rotate_vector (current_frame->glyphs + from, - sizeof (GLYPH *) * (end + amount - from), - amount * sizeof (GLYPH *)); - - rotate_vector (current_frame->charstarts + from, - sizeof (int *) * (end + amount - from), - amount * sizeof (int *)); - - safe_bcopy (current_frame->used + from, - current_frame->used + from + amount, - (end - from) * sizeof current_frame->used[0]); - - safe_bcopy (current_frame->highlight + from, - current_frame->highlight + from + amount, - (end - from) * sizeof current_frame->highlight[0]); - - safe_bcopy (current_frame->enable + from, - current_frame->enable + from + amount, - (end - from) * sizeof current_frame->enable[0]); - - /* Adjust the lines by an amount - that puts the first of them at NEWPOS. */ - pos_adjust = newpos - current_frame->charstarts[from + amount][0]; - - /* Offset each char position in the charstarts lines we moved - by pos_adjust. */ - for (i = from + amount; i < end + amount; i++) - { - int *line = current_frame->charstarts[i]; - int col; - for (col = 0; col < width; col++) - if (line[col] > 0) - line[col] += pos_adjust; - } - for (i = from; i < from + amount; i++) - { - int *line = current_frame->charstarts[i]; - int col; - line[0] = -1; - for (col = 0; col < width; col++) - line[col] = 0; - } - - /* Mark the lines made empty by scrolling as enabled, empty and - normal video. */ - bzero (current_frame->used + from, - amount * sizeof current_frame->used[0]); - bzero (current_frame->highlight + from, - amount * sizeof current_frame->highlight[0]); - for (i = from; i < from + amount; i++) - { - current_frame->glyphs[i][0] = '\0'; - current_frame->charstarts[i][0] = -1; - current_frame->enable[i] = 1; - } - - safe_bcopy (current_frame->bufp + from, - current_frame->bufp + from + amount, - (end - from) * sizeof current_frame->bufp[0]); - -#ifdef HAVE_WINDOW_SYSTEM - if (FRAME_WINDOW_P (frame)) - { - safe_bcopy (current_frame->top_left_x + from, - current_frame->top_left_x + from + amount, - (end - from) * sizeof current_frame->top_left_x[0]); - - safe_bcopy (current_frame->top_left_y + from, - current_frame->top_left_y + from + amount, - (end - from) * sizeof current_frame->top_left_y[0]); - - safe_bcopy (current_frame->pix_width + from, - current_frame->pix_width + from + amount, - (end - from) * sizeof current_frame->pix_width[0]); - - safe_bcopy (current_frame->pix_height + from, - current_frame->pix_height + from + amount, - (end - from) * sizeof current_frame->pix_height[0]); - - safe_bcopy (current_frame->max_ascent + from, - current_frame->max_ascent + from + amount, - (end - from) * sizeof current_frame->max_ascent[0]); - } -#endif /* HAVE_WINDOW_SYSTEM */ - - update_end (frame); - } - if (amount < 0) - { - update_begin (frame); - set_terminal_window (end); - ins_del_lines (from + amount, amount); - if (!scroll_region_ok) - ins_del_lines (end + amount, -amount); - set_terminal_window (0); - - rotate_vector (current_frame->glyphs + from + amount, - sizeof (GLYPH *) * (end - from - amount), - amount * sizeof (GLYPH *)); - - rotate_vector (current_frame->charstarts + from + amount, - sizeof (int *) * (end - from - amount), - amount * sizeof (int *)); - - safe_bcopy (current_frame->used + from, - current_frame->used + from + amount, - (end - from) * sizeof current_frame->used[0]); - - safe_bcopy (current_frame->highlight + from, - current_frame->highlight + from + amount, - (end - from) * sizeof current_frame->highlight[0]); - - safe_bcopy (current_frame->enable + from, - current_frame->enable + from + amount, - (end - from) * sizeof current_frame->enable[0]); - - /* Adjust the lines by an amount - that puts the first of them at NEWPOS. */ - pos_adjust = newpos - current_frame->charstarts[from + amount][0]; - - /* Offset each char position in the charstarts lines we moved - by pos_adjust. */ - for (i = from + amount; i < end + amount; i++) - { - int *line = current_frame->charstarts[i]; - int col; - for (col = 0; col < width; col++) - if (line[col] > 0) - line[col] += pos_adjust; - } - for (i = end + amount; i < end; i++) - { - int *line = current_frame->charstarts[i]; - int col; - line[0] = -1; - for (col = 0; col < width; col++) - line[col] = 0; - } - - /* Mark the lines made empty by scrolling as enabled, empty and - normal video. */ - bzero (current_frame->used + end + amount, - - amount * sizeof current_frame->used[0]); - bzero (current_frame->highlight + end + amount, - - amount * sizeof current_frame->highlight[0]); - for (i = end + amount; i < end; i++) - { - current_frame->glyphs[i][0] = '\0'; - current_frame->charstarts[i][0] = 0; - current_frame->enable[i] = 1; - } - - safe_bcopy (current_frame->bufp + from, - current_frame->bufp + from + amount, - (end - from) * sizeof current_frame->bufp[0]); - -#ifdef HAVE_WINDOW_SYSTEM - if (FRAME_WINDOW_P (frame)) - { - safe_bcopy (current_frame->top_left_x + from, - current_frame->top_left_x + from + amount, - (end - from) * sizeof current_frame->top_left_x[0]); - - safe_bcopy (current_frame->top_left_y + from, - current_frame->top_left_y + from + amount, - (end - from) * sizeof current_frame->top_left_y[0]); - - safe_bcopy (current_frame->pix_width + from, - current_frame->pix_width + from + amount, - (end - from) * sizeof current_frame->pix_width[0]); - - safe_bcopy (current_frame->pix_height + from, - current_frame->pix_height + from + amount, - (end - from) * sizeof current_frame->pix_height[0]); - - safe_bcopy (current_frame->max_ascent + from, - current_frame->max_ascent + from + amount, - (end - from) * sizeof current_frame->max_ascent[0]); - } -#endif /* HAVE_WINDOW_SYSTEM */ - - update_end (frame); - } - return 1; -} - -/* After updating a window W that isn't the full frame wide, - copy all the columns that W does not occupy - into the FRAME_DESIRED_GLYPHS (frame) from the FRAME_PHYS_GLYPHS (frame) - so that update_frame will not change those columns. */ - -preserve_other_columns (w) - struct window *w; -{ - register int vpos; - register struct frame_glyphs *current_frame, *desired_frame; - register FRAME_PTR frame = XFRAME (w->frame); - int start = WINDOW_LEFT_MARGIN (w); - int end = WINDOW_RIGHT_EDGE (w); - int bot = XFASTINT (w->top) + XFASTINT (w->height); - - current_frame = FRAME_CURRENT_GLYPHS (frame); - desired_frame = FRAME_DESIRED_GLYPHS (frame); - - for (vpos = XFASTINT (w->top); vpos < bot; vpos++) - { - if (current_frame->enable[vpos] && desired_frame->enable[vpos]) - { - if (start > 0) - { - int len; - - bcopy (current_frame->glyphs[vpos], - desired_frame->glyphs[vpos], - start * sizeof (current_frame->glyphs[vpos][0])); - bcopy (current_frame->charstarts[vpos], - desired_frame->charstarts[vpos], - start * sizeof (current_frame->charstarts[vpos][0])); - len = min (start, current_frame->used[vpos]); - if (desired_frame->used[vpos] < len) - desired_frame->used[vpos] = len; - } - if (current_frame->used[vpos] > end - && desired_frame->used[vpos] < current_frame->used[vpos]) - { - while (desired_frame->used[vpos] < end) - { - int used = desired_frame->used[vpos]++; - desired_frame->glyphs[vpos][used] = SPACEGLYPH; - desired_frame->glyphs[vpos][used] = 0; - } - bcopy (current_frame->glyphs[vpos] + end, - desired_frame->glyphs[vpos] + end, - ((current_frame->used[vpos] - end) - * sizeof (current_frame->glyphs[vpos][0]))); - bcopy (current_frame->charstarts[vpos] + end, - desired_frame->charstarts[vpos] + end, - ((current_frame->used[vpos] - end) - * sizeof (current_frame->charstarts[vpos][0]))); - desired_frame->used[vpos] = current_frame->used[vpos]; - } - } - } -} - -#if 0 - -/* If window w does not need to be updated and isn't the full frame wide, - copy all the columns that w does occupy - into the FRAME_DESIRED_LINES (frame) from the FRAME_PHYS_LINES (frame) - so that update_frame will not change those columns. - - Have not been able to figure out how to use this correctly. */ - -preserve_my_columns (w) - struct window *w; -{ - register int vpos, fin; - register struct frame_glyphs *l1, *l2; - register FRAME_PTR frame = XFRAME (w->frame); - int start = WINDOW_LEFT_MARGIN (w); - int end = WINDOW_RIGHT_EDGE (w); - int bot = XFASTINT (w->top) + XFASTINT (w->height); - - for (vpos = XFASTINT (w->top); vpos < bot; vpos++) - { - if ((l1 = FRAME_DESIRED_GLYPHS (frame)->glyphs[vpos + 1]) - && (l2 = FRAME_PHYS_GLYPHS (frame)->glyphs[vpos + 1])) - { - if (l2->length > start && l1->length < l2->length) - { - fin = l2->length; - if (fin > end) fin = end; - while (l1->length < start) - l1->body[l1->length++] = ' '; - bcopy (l2->body + start, l1->body + start, fin - start); - l1->length = fin; - } - } - } -} - -#endif - -/* Adjust by ADJUST the charstart values in window W - after vpos VPOS, which counts relative to the frame - (not relative to W itself). */ - -void -adjust_window_charstarts (w, vpos, adjust) - struct window *w; - int vpos; - int adjust; -{ - int left = WINDOW_LEFT_MARGIN (w); - int top = XFASTINT (w->top); - int right = left + window_internal_width (w); - int bottom = top + window_internal_height (w); - int i; - - for (i = vpos + 1; i < bottom; i++) - { - int *charstart - = FRAME_CURRENT_GLYPHS (XFRAME (WINDOW_FRAME (w)))->charstarts[i]; - int j; - for (j = left; j < right; j++) - if (charstart[j] > 0) - charstart[j] += adjust; - } -} - -/* Check the charstarts values in the area of window W - for internal consistency. We cannot check that they are "right"; - we can only look for something nonsensical. */ - -verify_charstarts (w) - struct window *w; -{ - FRAME_PTR f = XFRAME (WINDOW_FRAME (w)); - int i; - int top = XFASTINT (w->top); - int bottom = top + window_internal_height (w); - int left = WINDOW_LEFT_MARGIN (w); - int right = left + window_internal_width (w); - int next_line; - int truncate = (XINT (w->hscroll) - || (truncate_partial_width_windows - && !WINDOW_FULL_WIDTH_P (w)) - || !NILP (XBUFFER (w->buffer)->truncate_lines)); - - for (i = top; i < bottom; i++) - { - int j; - int last; - int *charstart = FRAME_CURRENT_GLYPHS (f)->charstarts[i]; - - if (i != top) - { - if (truncate) - { - /* If we are truncating lines, allow a jump - in charstarts from one line to the next. */ - if (charstart[left] < next_line) - abort (); - } - else - { - if (charstart[left] != next_line) - abort (); - } - } - - for (j = left; j < right; j++) - if (charstart[j] > 0) - last = charstart[j]; - /* Record where the next line should start. */ - next_line = last; - if (BUF_ZV (XBUFFER (w->buffer)) != last) - { - /* If there's a newline between the two lines, count that. */ - int endchar = *BUF_CHAR_ADDRESS (XBUFFER (w->buffer), last); - if (endchar == '\n') - next_line++; - } - } -} - -/* On discovering that the redisplay for a window was no good, - cancel the columns of that window, so that when the window is - displayed over again get_display_line will not complain. */ - -cancel_my_columns (w) - struct window *w; -{ - register int vpos; - register struct frame_glyphs *desired_glyphs - = FRAME_DESIRED_GLYPHS (XFRAME (w->frame)); - register int start = WINDOW_LEFT_MARGIN (w); - register int bot = XFASTINT (w->top) + XFASTINT (w->height); - - for (vpos = XFASTINT (w->top); vpos < bot; vpos++) - if (desired_glyphs->enable[vpos] - && desired_glyphs->used[vpos] >= start) - desired_glyphs->used[vpos] = start; -} - -/* These functions try to perform directly and immediately on the frame - the necessary output for one change in the buffer. - They may return 0 meaning nothing was done if anything is difficult, - or 1 meaning the output was performed properly. - They assume that the frame was up to date before the buffer - change being displayed. They make various other assumptions too; - see command_loop_1 where these are called. */ - -int -direct_output_for_insert (g) - int g; -{ - register FRAME_PTR frame = selected_frame; - register struct frame_glyphs *current_frame - = FRAME_CURRENT_GLYPHS (frame); - -#ifndef COMPILER_REGISTER_BUG - register -#endif /* COMPILER_REGISTER_BUG */ - struct window *w = XWINDOW (selected_window); -#ifndef COMPILER_REGISTER_BUG - register -#endif /* COMPILER_REGISTER_BUG */ - int hpos = FRAME_CURSOR_X (frame); -#ifndef COMPILER_REGISTER_BUG - register -#endif /* COMPILER_REGISTER_BUG */ - int vpos = FRAME_CURSOR_Y (frame); - - /* Give up if about to continue line. */ - if (hpos >= WINDOW_LEFT_MARGIN (w) + window_internal_width (w) - 1 - - /* Avoid losing if cursor is in invisible text off left margin */ - || (XINT (w->hscroll) && hpos == WINDOW_LEFT_MARGIN (w)) - - /* Give up if cursor outside window (in minibuf, probably) */ - || cursor_in_echo_area - || FRAME_CURSOR_Y (frame) < XFASTINT (w->top) - || FRAME_CURSOR_Y (frame) >= XFASTINT (w->top) + XFASTINT (w->height) - - /* Give up if cursor not really at FRAME_CURSOR_X, FRAME_CURSOR_Y */ - || !display_completed - - /* Give up if buffer appears in two places. */ - || buffer_shared > 1 - -#ifdef USE_TEXT_PROPERTIES - /* Intervals have already been adjusted, point is after the - character that was just inserted. */ - /* Give up if character is invisible. */ - /* Give up if character has a face property. - At the moment we only lose at end of line or end of buffer - and only with faces that have some background */ - /* Instead of wasting time, give up if character has any text properties */ - || ! NILP (Ftext_properties_at (make_number (PT - 1), Qnil)) -#endif - - /* Give up if w is minibuffer and a message is being displayed there */ - || (MINI_WINDOW_P (w) && echo_area_glyphs)) - return 0; - - { - int face = 0; -#ifdef HAVE_FACES - int dummy; - - if (FRAME_WINDOW_P (frame) || FRAME_MSDOS_P (frame)) - face = compute_char_face (frame, w, PT - 1, -1, -1, &dummy, PT, 0); -#endif - current_frame->glyphs[vpos][hpos] = MAKE_GLYPH (frame, g, face); - current_frame->charstarts[vpos][hpos] = PT - 1; - /* Record the entry for after the newly inserted character. */ - current_frame->charstarts[vpos][hpos + 1] = PT; - adjust_window_charstarts (w, vpos, 1); - } - unchanged_modified = MODIFF; - beg_unchanged = GPT - BEG; - XSETFASTINT (w->last_point, PT); - XSETFASTINT (w->last_point_x, hpos); - XSETFASTINT (w->last_modified, MODIFF); - XSETFASTINT (w->last_overlay_modified, OVERLAY_MODIFF); - - reassert_line_highlight (0, vpos); - write_glyphs (¤t_frame->glyphs[vpos][hpos], 1); - fflush (stdout); - ++FRAME_CURSOR_X (frame); - if (hpos == current_frame->used[vpos]) - { - current_frame->used[vpos] = hpos + 1; - current_frame->glyphs[vpos][hpos + 1] = 0; - } - - return 1; -} - -int -direct_output_forward_char (n) - int n; -{ - register FRAME_PTR frame = selected_frame; - register struct window *w = XWINDOW (selected_window); - Lisp_Object position; - int hpos = FRAME_CURSOR_X (frame); - - /* Give up if in truncated text at end of line. */ - if (hpos >= WINDOW_LEFT_MARGIN (w) + window_internal_width (w) - 1) - return 0; - - /* Avoid losing if cursor is in invisible text off left margin - or about to go off either side of window. */ - if ((FRAME_CURSOR_X (frame) == WINDOW_LEFT_MARGIN (w) - && (XINT (w->hscroll) || n < 0)) - || (n > 0 - && (FRAME_CURSOR_X (frame) + 1 >= window_internal_width (w) - 1)) - || cursor_in_echo_area) - return 0; - - /* Can't use direct output if highlighting a region. */ - if (!NILP (Vtransient_mark_mode) && !NILP (current_buffer->mark_active)) - return 0; - - /* Can't use direct output at an overlay boundary; it might have - before-string or after-string properties. */ - if (overlay_touches_p (PT) || overlay_touches_p (PT - n)) - return 0; - -#ifdef USE_TEXT_PROPERTIES - /* Don't use direct output next to an invisible character - since we might need to do something special. */ - - XSETFASTINT (position, PT); - if (XFASTINT (position) < ZV - && ! NILP (Fget_char_property (position, - Qinvisible, - selected_window))) - return 0; - - XSETFASTINT (position, PT - 1); - if (XFASTINT (position) >= BEGV - && ! NILP (Fget_char_property (position, - Qinvisible, - selected_window))) - return 0; -#endif - - FRAME_CURSOR_X (frame) += n; - XSETFASTINT (w->last_point_x, FRAME_CURSOR_X (frame)); - XSETFASTINT (w->last_point, PT); - cursor_to (FRAME_CURSOR_Y (frame), FRAME_CURSOR_X (frame)); - fflush (stdout); - - return 1; -} - -static void update_line (); - -/* Update frame F based on the data in FRAME_DESIRED_GLYPHS. - Value is nonzero if redisplay stopped due to pending input. - FORCE nonzero means do not stop for pending input. */ - -int -update_frame (f, force, inhibit_hairy_id) - FRAME_PTR f; - int force; - int inhibit_hairy_id; -{ - register struct frame_glyphs *current_frame; - register struct frame_glyphs *desired_frame = 0; - register int i; - int pause; - int preempt_count = baud_rate / 2400 + 1; - extern input_pending; -#ifdef HAVE_WINDOW_SYSTEM - register int downto, leftmost; -#endif - - if (baud_rate != FRAME_COST_BAUD_RATE (f)) - calculate_costs (f); - - if (preempt_count <= 0) - preempt_count = 1; - - if (FRAME_HEIGHT (f) == 0) abort (); /* Some bug zeros some core */ - - detect_input_pending (); - if (input_pending && !force) - { - pause = 1; - goto do_pause; - } - - update_begin (f); - - if (!line_ins_del_ok) - inhibit_hairy_id = 1; - - /* These are separate to avoid a possible bug in the AIX C compiler. */ - current_frame = FRAME_CURRENT_GLYPHS (f); - desired_frame = FRAME_DESIRED_GLYPHS (f); - - /* See if any of the desired lines are enabled; don't compute for - i/d line if just want cursor motion. */ - for (i = 0; i < FRAME_HEIGHT (f); i++) - if (desired_frame->enable[i]) - break; - - /* Try doing i/d line, if not yet inhibited. */ - if (!inhibit_hairy_id && i < FRAME_HEIGHT (f)) - force |= scrolling (f); - - /* Update the individual lines as needed. Do bottom line first. */ - - if (desired_frame->enable[FRAME_HEIGHT (f) - 1]) - update_line (f, FRAME_HEIGHT (f) - 1); - -#ifdef HAVE_WINDOW_SYSTEM - if (FRAME_WINDOW_P (f)) - { - leftmost = downto = FRAME_INTERNAL_BORDER_WIDTH (f); - if (desired_frame->enable[0]) - { - current_frame->top_left_x[FRAME_HEIGHT (f) - 1] = leftmost; - current_frame->top_left_y[FRAME_HEIGHT (f) - 1] - = PIXEL_HEIGHT (f) - FRAME_INTERNAL_BORDER_WIDTH (f) - - current_frame->pix_height[FRAME_HEIGHT (f) - 1]; - current_frame->top_left_x[0] = leftmost; - current_frame->top_left_y[0] = downto; - } - } -#endif /* HAVE_WINDOW_SYSTEM */ - - /* Now update the rest of the lines. */ - for (i = 0; i < FRAME_HEIGHT (f) - 1 && (force || !input_pending); i++) - { - if (desired_frame->enable[i]) - { - if (FRAME_TERMCAP_P (f)) - { - /* Flush out every so many lines. - Also flush out if likely to have more than 1k buffered - otherwise. I'm told that some telnet connections get - really screwed by more than 1k output at once. */ - int outq = PENDING_OUTPUT_COUNT (stdout); - if (outq > 900 - || (outq > 20 && ((i - 1) % preempt_count == 0))) - { - fflush (stdout); - if (preempt_count == 1) - { -#ifdef EMACS_OUTQSIZE - if (EMACS_OUTQSIZE (0, &outq) < 0) - /* Probably not a tty. Ignore the error and reset - * the outq count. */ - outq = PENDING_OUTPUT_COUNT (stdout); -#endif - outq *= 10; - if (baud_rate <= outq && baud_rate > 0) - sleep (outq / baud_rate); - } - } - } - - if ((i - 1) % preempt_count == 0) - detect_input_pending (); - - update_line (f, i); -#ifdef HAVE_WINDOW_SYSTEM - if (FRAME_WINDOW_P (f)) - { - current_frame->top_left_y[i] = downto; - current_frame->top_left_x[i] = leftmost; - } -#endif /* HAVE_WINDOW_SYSTEM */ - } - -#ifdef HAVE_WINDOW_SYSTEM - if (FRAME_WINDOW_P (f)) - downto += current_frame->pix_height[i]; -#endif /* HAVE_WINDOW_SYSTEM */ - } - pause = (i < FRAME_HEIGHT (f) - 1) ? i : 0; - - /* Now just clean up termcap drivers and set cursor, etc. */ - if (!pause) - { - if ((cursor_in_echo_area - /* If we are showing a message instead of the minibuffer, - show the cursor for the message instead of for the - (now hidden) minibuffer contents. */ - || (EQ (minibuf_window, selected_window) - && EQ (minibuf_window, echo_area_window) - && echo_area_glyphs != 0)) - /* These cases apply only to the frame that contains - the active minibuffer window. */ - && FRAME_HAS_MINIBUF_P (f) - && EQ (FRAME_MINIBUF_WINDOW (f), echo_area_window)) - { - int top = XINT (XWINDOW (FRAME_MINIBUF_WINDOW (f))->top); - int row, col; - - if (cursor_in_echo_area < 0) - { - row = top; - col = 0; - } - else - { - /* If the minibuffer is several lines high, find the last - line that has any text on it. */ - row = FRAME_HEIGHT (f); - do - { - row--; - if (current_frame->enable[row]) - col = current_frame->used[row]; - else - col = 0; - } - while (row > top && col == 0); - - if (col >= FRAME_WINDOW_WIDTH (f)) - { - col = 0; - if (row < FRAME_HEIGHT (f) - 1) - row++; - } - } - - cursor_to (row, col); - } - else - cursor_to (FRAME_CURSOR_Y (f), - max (min (FRAME_CURSOR_X (f), - FRAME_WINDOW_WIDTH (f) - 1), 0)); - } - - update_end (f); - - if (termscript) - fflush (termscript); - fflush (stdout); - - /* Here if output is preempted because input is detected. */ - do_pause: - - if (FRAME_HEIGHT (f) == 0) abort (); /* Some bug zeros some core */ - display_completed = !pause; - - bzero (FRAME_DESIRED_GLYPHS (f)->enable, FRAME_HEIGHT (f)); - return pause; -} - -/* Called when about to quit, to check for doing so - at an improper time. */ - -void -quit_error_check () -{ -#if 0 - if (FRAME_DESIRED_GLYPHS (selected_frame) == 0) - return; - if (FRAME_DESIRED_GLYPHS (selected_frame)->enable[0]) - abort (); - if (FRAME_DESIRED_GLYPHS (selected_frame)->enable[FRAME_HEIGHT (selected_frame) - 1]) - abort (); -#endif -} - -/* Decide what insert/delete line to do, and do it */ - -extern void scrolling_1 (); - -scrolling (frame) - FRAME_PTR frame; -{ - int unchanged_at_top, unchanged_at_bottom; - int window_size; - int changed_lines; - int *old_hash = (int *) alloca (FRAME_HEIGHT (frame) * sizeof (int)); - int *new_hash = (int *) alloca (FRAME_HEIGHT (frame) * sizeof (int)); - int *draw_cost = (int *) alloca (FRAME_HEIGHT (frame) * sizeof (int)); - int *old_draw_cost = (int *) alloca (FRAME_HEIGHT (frame) * sizeof (int)); - register int i; - int free_at_end_vpos = FRAME_HEIGHT (frame); - register struct frame_glyphs *current_frame = FRAME_CURRENT_GLYPHS (frame); - register struct frame_glyphs *desired_frame = FRAME_DESIRED_GLYPHS (frame); - - /* Compute hash codes of all the lines. - Also calculate number of changed lines, - number of unchanged lines at the beginning, - and number of unchanged lines at the end. */ - - changed_lines = 0; - unchanged_at_top = 0; - unchanged_at_bottom = FRAME_HEIGHT (frame); - for (i = 0; i < FRAME_HEIGHT (frame); i++) - { - /* Give up on this scrolling if some old lines are not enabled. */ - if (!current_frame->enable[i]) - return 0; - old_hash[i] = line_hash_code (current_frame, i); - if (! desired_frame->enable[i]) - new_hash[i] = old_hash[i]; - else - new_hash[i] = line_hash_code (desired_frame, i); - - if (old_hash[i] != new_hash[i]) - { - changed_lines++; - unchanged_at_bottom = FRAME_HEIGHT (frame) - i - 1; - } - else if (i == unchanged_at_top) - unchanged_at_top++; - draw_cost[i] = line_draw_cost (desired_frame, i); - old_draw_cost[i] = line_draw_cost (current_frame, i); - } - - /* If changed lines are few, don't allow preemption, don't scroll. */ - if (!scroll_region_ok && changed_lines < baud_rate / 2400 - || unchanged_at_bottom == FRAME_HEIGHT (frame)) - return 1; - - window_size = (FRAME_HEIGHT (frame) - unchanged_at_top - - unchanged_at_bottom); - - if (scroll_region_ok) - free_at_end_vpos -= unchanged_at_bottom; - else if (memory_below_frame) - free_at_end_vpos = -1; - - /* If large window, fast terminal and few lines in common between - current frame and desired frame, don't bother with i/d calc. */ - if (!scroll_region_ok && window_size >= 18 && baud_rate > 2400 - && (window_size >= - 10 * scrolling_max_lines_saved (unchanged_at_top, - FRAME_HEIGHT (frame) - unchanged_at_bottom, - old_hash, new_hash, draw_cost))) - return 0; - - scrolling_1 (frame, window_size, unchanged_at_top, unchanged_at_bottom, - draw_cost + unchanged_at_top - 1, - old_draw_cost + unchanged_at_top - 1, - old_hash + unchanged_at_top - 1, - new_hash + unchanged_at_top - 1, - free_at_end_vpos - unchanged_at_top); - - return 0; -} - -/* Return the offset in its buffer of the character at location col, line - in the given window. */ -int -buffer_posn_from_coords (window, col, line) - struct window *window; - int col, line; -{ - int hscroll = XINT (window->hscroll); - int window_left = WINDOW_LEFT_MARGIN (window); - - /* The actual width of the window is window->width less one for the - DISP_CONTINUE_GLYPH, and less one if it's not the rightmost - window. */ - int window_width = window_internal_width (window) - 1; - - int startp = marker_position (window->start); - - /* Since compute_motion will only operate on the current buffer, - we need to save the old one and restore it when we're done. */ - struct buffer *old_current_buffer = current_buffer; - struct position *posn; - - current_buffer = XBUFFER (window->buffer); - - /* We can't get a correct result in this case, - but at least prevent compute_motion from crashing. */ - if (startp < BEGV) - startp = BEGV; - - /* It would be nice if we could use FRAME_CURRENT_GLYPHS (XFRAME - (window->frame))->bufp to avoid scanning from the very top of - the window, but it isn't maintained correctly, and I'm not even - sure I will keep it. */ - posn = compute_motion (startp, 0, - ((window == XWINDOW (minibuf_window) && startp == BEG - ? minibuf_prompt_width : 0) - + (hscroll ? 1 - hscroll : 0)), - 0, - ZV, line, col, - window_width, hscroll, 0, window); - - current_buffer = old_current_buffer; - - /* compute_motion considers frame points past the end of a line - to be *after* the newline, i.e. at the start of the next line. - This is reasonable, but not really what we want. So if the - result is on a line below LINE, back it up one character. */ - if (posn->vpos > line) - return posn->bufpos - 1; - else - return posn->bufpos; -} - -static int -count_blanks (r) - register GLYPH *r; -{ - register GLYPH *p = r; - while (*p++ == SPACEGLYPH); - return p - r - 1; -} - -static int -count_match (str1, str2) - GLYPH *str1, *str2; -{ - register GLYPH *p1 = str1; - register GLYPH *p2 = str2; - while (*p1++ == *p2++); - return p1 - str1 - 1; -} - -/* Char insertion/deletion cost vector, from term.c */ -extern int *char_ins_del_vector; - -#define char_ins_del_cost(f) (&char_ins_del_vector[FRAME_WINDOW_WIDTH((f))]) - -static void -update_line (frame, vpos) - register FRAME_PTR frame; - int vpos; -{ - register GLYPH *obody, *nbody, *op1, *op2, *np1, *temp; - int *temp1; - int tem; - int osp, nsp, begmatch, endmatch, olen, nlen; - int save; - register struct frame_glyphs *current_frame - = FRAME_CURRENT_GLYPHS (frame); - register struct frame_glyphs *desired_frame - = FRAME_DESIRED_GLYPHS (frame); - - if (desired_frame->highlight[vpos] - != (current_frame->enable[vpos] && current_frame->highlight[vpos])) - { - change_line_highlight (desired_frame->highlight[vpos], vpos, - (current_frame->enable[vpos] ? - current_frame->used[vpos] : 0)); - current_frame->enable[vpos] = 0; - } - else - reassert_line_highlight (desired_frame->highlight[vpos], vpos); - - if (! current_frame->enable[vpos]) - { - olen = 0; - } - else - { - obody = current_frame->glyphs[vpos]; - olen = current_frame->used[vpos]; - if (! current_frame->highlight[vpos]) - { - if (!must_write_spaces) - while (olen > 0 && obody[olen - 1] == SPACEGLYPH) - olen--; - } - else - { - /* For an inverse-video line, remember we gave it - spaces all the way to the frame edge - so that the reverse video extends all the way across. */ - - while (olen < FRAME_WINDOW_WIDTH (frame) - 1) - obody[olen++] = SPACEGLYPH; - } - } - - /* One way or another, this will enable the line being updated. */ - current_frame->enable[vpos] = 1; - current_frame->used[vpos] = desired_frame->used[vpos]; - current_frame->highlight[vpos] = desired_frame->highlight[vpos]; - current_frame->bufp[vpos] = desired_frame->bufp[vpos]; - -#ifdef HAVE_WINDOW_SYSTEM - if (FRAME_WINDOW_P (frame)) - { - current_frame->pix_width[vpos] - = current_frame->used[vpos] - * FONT_WIDTH (FRAME_FONT (frame)); - current_frame->pix_height[vpos] - = FRAME_LINE_HEIGHT (frame); - } -#endif /* HAVE_WINDOW_SYSTEM */ - - if (!desired_frame->enable[vpos]) - { - nlen = 0; - goto just_erase; - } - - nbody = desired_frame->glyphs[vpos]; - nlen = desired_frame->used[vpos]; - - /* Pretend trailing spaces are not there at all, - unless for one reason or another we must write all spaces. */ - if (! desired_frame->highlight[vpos]) - { - if (!must_write_spaces) - /* We know that the previous character byte contains 0. */ - while (nbody[nlen - 1] == SPACEGLYPH) - nlen--; - } - else - { - /* For an inverse-video line, give it extra trailing spaces - all the way to the frame edge - so that the reverse video extends all the way across. */ - - while (nlen < FRAME_WINDOW_WIDTH (frame) - 1) - nbody[nlen++] = SPACEGLYPH; - } - - /* If there's no i/d char, quickly do the best we can without it. */ - if (!char_ins_del_ok) - { - int i,j; - -#if 0 - if (FRAME_X_P (frame)) - { - /* Under X, erase everything we are going to rewrite, - and rewrite everything from the first char that's changed. - This is part of supporting fonts like Courier - whose chars can overlap outside the char width. */ - for (i = 0; i < nlen; i++) - if (i >= olen || nbody[i] != obody[i]) - break; - - cursor_to (vpos, i); - if (i != olen) - clear_end_of_line (olen); - write_glyphs (nbody + i, nlen - i); - } - else - {} -#endif /* 0 */ - for (i = 0; i < nlen; i++) - { - if (i >= olen || nbody[i] != obody[i]) /* A non-matching char. */ - { - cursor_to (vpos, i); - for (j = 1; (i + j < nlen && - (i + j >= olen || nbody[i+j] != obody[i+j])); - j++); - - /* Output this run of non-matching chars. */ - write_glyphs (nbody + i, j); - i += j - 1; - - /* Now find the next non-match. */ - } - } - - /* Clear the rest of the line, or the non-clear part of it. */ - if (olen > nlen) - { - cursor_to (vpos, nlen); - clear_end_of_line (olen); - } - - /* Exchange contents between current_frame and new_frame. */ - temp = desired_frame->glyphs[vpos]; - desired_frame->glyphs[vpos] = current_frame->glyphs[vpos]; - current_frame->glyphs[vpos] = temp; - - /* Exchange charstarts between current_frame and new_frame. */ - temp1 = desired_frame->charstarts[vpos]; - desired_frame->charstarts[vpos] = current_frame->charstarts[vpos]; - current_frame->charstarts[vpos] = temp1; - - return; - } - - if (!olen) - { - nsp = (must_write_spaces || desired_frame->highlight[vpos]) - ? 0 : count_blanks (nbody); - if (nlen > nsp) - { - cursor_to (vpos, nsp); - write_glyphs (nbody + nsp, nlen - nsp); - } - - /* Exchange contents between current_frame and new_frame. */ - temp = desired_frame->glyphs[vpos]; - desired_frame->glyphs[vpos] = current_frame->glyphs[vpos]; - current_frame->glyphs[vpos] = temp; - - /* Exchange charstarts between current_frame and new_frame. */ - temp1 = desired_frame->charstarts[vpos]; - desired_frame->charstarts[vpos] = current_frame->charstarts[vpos]; - current_frame->charstarts[vpos] = temp1; - - return; - } - - obody[olen] = 1; - save = nbody[nlen]; - nbody[nlen] = 0; - - /* Compute number of leading blanks in old and new contents. */ - osp = count_blanks (obody); - if (!desired_frame->highlight[vpos]) - nsp = count_blanks (nbody); - else - nsp = 0; - - /* Compute number of matching chars starting with first nonblank. */ - begmatch = count_match (obody + osp, nbody + nsp); - - /* Spaces in new match implicit space past the end of old. */ - /* A bug causing this to be a no-op was fixed in 18.29. */ - if (!must_write_spaces && osp + begmatch == olen) - { - np1 = nbody + nsp; - while (np1[begmatch] == SPACEGLYPH) - begmatch++; - } - - /* Avoid doing insert/delete char - just cause number of leading spaces differs - when the following text does not match. */ - if (begmatch == 0 && osp != nsp) - osp = nsp = min (osp, nsp); - - /* Find matching characters at end of line */ - op1 = obody + olen; - np1 = nbody + nlen; - op2 = op1 + begmatch - min (olen - osp, nlen - nsp); - while (op1 > op2 && op1[-1] == np1[-1]) - { - op1--; - np1--; - } - endmatch = obody + olen - op1; - - /* Put correct value back in nbody[nlen]. - This is important because direct_output_for_insert - can write into the line at a later point. - If this screws up the zero at the end of the line, re-establish it. */ - nbody[nlen] = save; - obody[olen] = 0; - - /* tem gets the distance to insert or delete. - endmatch is how many characters we save by doing so. - Is it worth it? */ - - tem = (nlen - nsp) - (olen - osp); - if (endmatch && tem - && (!char_ins_del_ok || endmatch <= char_ins_del_cost (frame)[tem])) - endmatch = 0; - - /* nsp - osp is the distance to insert or delete. - If that is nonzero, begmatch is known to be nonzero also. - begmatch + endmatch is how much we save by doing the ins/del. - Is it worth it? */ - - if (nsp != osp - && (!char_ins_del_ok - || begmatch + endmatch <= char_ins_del_cost (frame)[nsp - osp])) - { - begmatch = 0; - endmatch = 0; - osp = nsp = min (osp, nsp); - } - - /* Now go through the line, inserting, writing and - deleting as appropriate. */ - - if (osp > nsp) - { - cursor_to (vpos, nsp); - delete_glyphs (osp - nsp); - } - else if (nsp > osp) - { - /* If going to delete chars later in line - and insert earlier in the line, - must delete first to avoid losing data in the insert */ - if (endmatch && nlen < olen + nsp - osp) - { - cursor_to (vpos, nlen - endmatch + osp - nsp); - delete_glyphs (olen + nsp - osp - nlen); - olen = nlen - (nsp - osp); - } - cursor_to (vpos, osp); - insert_glyphs ((char *)0, nsp - osp); - } - olen += nsp - osp; - - tem = nsp + begmatch + endmatch; - if (nlen != tem || olen != tem) - { - cursor_to (vpos, nsp + begmatch); - if (!endmatch || nlen == olen) - { - /* If new text being written reaches right margin, - there is no need to do clear-to-eol at the end. - (and it would not be safe, since cursor is not - going to be "at the margin" after the text is done) */ - if (nlen == FRAME_WINDOW_WIDTH (frame)) - olen = 0; - write_glyphs (nbody + nsp + begmatch, nlen - tem); - -#ifdef obsolete - -/* the following code loses disastrously if tem == nlen. - Rather than trying to fix that case, I am trying the simpler - solution found above. */ - - /* If the text reaches to the right margin, - it will lose one way or another (depending on AutoWrap) - to clear to end of line after outputting all the text. - So pause with one character to go and clear the line then. */ - if (nlen == FRAME_WINDOW_WIDTH (frame) && fast_clear_end_of_line && olen > nlen) - { - /* endmatch must be zero, and tem must equal nsp + begmatch */ - write_glyphs (nbody + tem, nlen - tem - 1); - clear_end_of_line (olen); - olen = 0; /* Don't let it be cleared again later */ - write_glyphs (nbody + nlen - 1, 1); - } - else - write_glyphs (nbody + nsp + begmatch, nlen - tem); -#endif /* OBSOLETE */ - - } - else if (nlen > olen) - { - write_glyphs (nbody + nsp + begmatch, olen - tem); - insert_glyphs (nbody + nsp + begmatch + olen - tem, nlen - olen); - olen = nlen; - } - else if (olen > nlen) - { - write_glyphs (nbody + nsp + begmatch, nlen - tem); - delete_glyphs (olen - nlen); - olen = nlen; - } - } - - just_erase: - /* If any unerased characters remain after the new line, erase them. */ - if (olen > nlen) - { - cursor_to (vpos, nlen); - clear_end_of_line (olen); - } - - /* Exchange contents between current_frame and new_frame. */ - temp = desired_frame->glyphs[vpos]; - desired_frame->glyphs[vpos] = current_frame->glyphs[vpos]; - current_frame->glyphs[vpos] = temp; - - /* Exchange charstarts between current_frame and new_frame. */ - temp1 = desired_frame->charstarts[vpos]; - desired_frame->charstarts[vpos] = current_frame->charstarts[vpos]; - current_frame->charstarts[vpos] = temp1; -} - -/* A vector of size >= 2 * NFRAMES + 3 * NBUFFERS + 1, containing the - session's frames, frame names, buffers, buffer-read-only flags, and - buffer-modified-flags, and a trailing sentinel (so we don't need to - add length checks). */ -static Lisp_Object frame_and_buffer_state; - -DEFUN ("frame-or-buffer-changed-p", Fframe_or_buffer_changed_p, - Sframe_or_buffer_changed_p, 0, 0, 0, - "Return non-nil if the frame and buffer state appears to have changed.\n\ -The state variable is an internal vector containing all frames and buffers,\n\ -aside from buffers whose names start with space,\n\ -along with the buffers' read-only and modified flags, which allows a fast\n\ -check to see whether the menu bars might need to be recomputed.\n\ -If this function returns non-nil, it updates the internal vector to reflect\n\ -the current state.\n") - () -{ - Lisp_Object tail, frame, buf; - Lisp_Object *vecp; - int n; - - vecp = XVECTOR (frame_and_buffer_state)->contents; - FOR_EACH_FRAME (tail, frame) - { - if (!EQ (*vecp++, frame)) - goto changed; - if (!EQ (*vecp++, XFRAME (frame)->name)) - goto changed; - } - /* Check that the buffer info matches. - No need to test for the end of the vector - because the last element of the vector is lambda - and that will always cause a mismatch. */ - for (tail = Vbuffer_alist; CONSP (tail); tail = XCONS (tail)->cdr) - { - buf = XCONS (XCONS (tail)->car)->cdr; - /* Ignore buffers that aren't included in buffer lists. */ - if (XSTRING (XBUFFER (buf)->name)->data[0] == ' ') - continue; - if (!EQ (*vecp++, buf)) - goto changed; - if (!EQ (*vecp++, XBUFFER (buf)->read_only)) - goto changed; - if (!EQ (*vecp++, Fbuffer_modified_p (buf))) - goto changed; - } - /* Detect deletion of a buffer at the end of the list. */ - if (*vecp == Qlambda) - return Qnil; - changed: - /* Start with 1 so there is room for at least one lambda at the end. */ - n = 1; - FOR_EACH_FRAME (tail, frame) - n += 2; - for (tail = Vbuffer_alist; CONSP (tail); tail = XCONS (tail)->cdr) - n += 3; - /* Reallocate the vector if it's grown, or if it's shrunk a lot. */ - if (n > XVECTOR (frame_and_buffer_state)->size - || n + 20 < XVECTOR (frame_and_buffer_state)->size / 2) - /* Add 20 extra so we grow it less often. */ - frame_and_buffer_state = Fmake_vector (make_number (n + 20), Qlambda); - vecp = XVECTOR (frame_and_buffer_state)->contents; - FOR_EACH_FRAME (tail, frame) - { - *vecp++ = frame; - *vecp++ = XFRAME (frame)->name; - } - for (tail = Vbuffer_alist; CONSP (tail); tail = XCONS (tail)->cdr) - { - buf = XCONS (XCONS (tail)->car)->cdr; - /* Ignore buffers that aren't included in buffer lists. */ - if (XSTRING (XBUFFER (buf)->name)->data[0] == ' ') - continue; - *vecp++ = buf; - *vecp++ = XBUFFER (buf)->read_only; - *vecp++ = Fbuffer_modified_p (buf); - } - /* Fill up the vector with lambdas (always at least one). */ - *vecp++ = Qlambda; - while (vecp - XVECTOR (frame_and_buffer_state)->contents - < XVECTOR (frame_and_buffer_state)->size) - *vecp++ = Qlambda; - /* Make sure we didn't overflow the vector. */ - if (vecp - XVECTOR (frame_and_buffer_state)->contents - > XVECTOR (frame_and_buffer_state)->size) - abort (); - return Qt; -} - -DEFUN ("open-termscript", Fopen_termscript, Sopen_termscript, - 1, 1, "FOpen termscript file: ", - "Start writing all terminal output to FILE as well as the terminal.\n\ -FILE = nil means just close any termscript file currently open.") - (file) - Lisp_Object file; -{ - if (termscript != 0) fclose (termscript); - termscript = 0; - - if (! NILP (file)) - { - file = Fexpand_file_name (file, Qnil); - termscript = fopen (XSTRING (file)->data, "w"); - if (termscript == 0) - report_file_error ("Opening termscript", Fcons (file, Qnil)); - } - return Qnil; -} - - -#ifdef SIGWINCH -SIGTYPE -window_change_signal (signalnum) /* If we don't have an argument, */ - int signalnum; /* some compilers complain in signal calls. */ -{ - int width, height; - extern int errno; - int old_errno = errno; - - get_frame_size (&width, &height); - - /* The frame size change obviously applies to a termcap-controlled - frame. Find such a frame in the list, and assume it's the only - one (since the redisplay code always writes to stdout, not a - FILE * specified in the frame structure). Record the new size, - but don't reallocate the data structures now. Let that be done - later outside of the signal handler. */ - - { - Lisp_Object tail, frame; - - FOR_EACH_FRAME (tail, frame) - { - if (FRAME_TERMCAP_P (XFRAME (frame))) - { - change_frame_size (XFRAME (frame), height, width, 0, 1); - break; - } - } - } - - signal (SIGWINCH, window_change_signal); - errno = old_errno; -} -#endif /* SIGWINCH */ - - -/* Do any change in frame size that was requested by a signal. */ - -do_pending_window_change () -{ - /* If window_change_signal should have run before, run it now. */ - while (delayed_size_change) - { - Lisp_Object tail, frame; - - delayed_size_change = 0; - - FOR_EACH_FRAME (tail, frame) - { - FRAME_PTR f = XFRAME (frame); - - int height = FRAME_NEW_HEIGHT (f); - int width = FRAME_NEW_WIDTH (f); - - if (height != 0 || width != 0) - change_frame_size (f, height, width, 0, 0); - } - } -} - - -/* Change the frame height and/or width. Values may be given as zero to - indicate no change is to take place. - - If DELAY is non-zero, then assume we're being called from a signal - handler, and queue the change for later - perhaps the next - redisplay. Since this tries to resize windows, we can't call it - from a signal handler. */ - -change_frame_size (f, newheight, newwidth, pretend, delay) - register FRAME_PTR f; - int newheight, newwidth, pretend; -{ - Lisp_Object tail, frame; - if (! FRAME_WINDOW_P (f)) - { - /* When using termcap, or on MS-DOS, all frames use - the same screen, so a change in size affects all frames. */ - FOR_EACH_FRAME (tail, frame) - if (! FRAME_WINDOW_P (XFRAME (frame))) - change_frame_size_1 (XFRAME (frame), newheight, newwidth, - pretend, delay); - } - else - change_frame_size_1 (f, newheight, newwidth, pretend, delay); -} - -static void -change_frame_size_1 (frame, newheight, newwidth, pretend, delay) - register FRAME_PTR frame; - int newheight, newwidth, pretend, delay; -{ - int new_frame_window_width; - /* If we can't deal with the change now, queue it for later. */ - if (delay) - { - FRAME_NEW_HEIGHT (frame) = newheight; - FRAME_NEW_WIDTH (frame) = newwidth; - delayed_size_change = 1; - return; - } - - /* This size-change overrides any pending one for this frame. */ - FRAME_NEW_HEIGHT (frame) = 0; - FRAME_NEW_WIDTH (frame) = 0; - - /* If an argument is zero, set it to the current value. */ - if (newheight == 0) - newheight = FRAME_HEIGHT (frame); - if (newwidth == 0) - newwidth = FRAME_WIDTH (frame); - new_frame_window_width = FRAME_WINDOW_WIDTH_ARG (frame, newwidth); - - /* Round up to the smallest acceptable size. */ - check_frame_size (frame, &newheight, &newwidth); - - /* If we're not changing the frame size, quit now. */ - if (newheight == FRAME_HEIGHT (frame) - && new_frame_window_width == FRAME_WINDOW_WIDTH (frame)) - return; - - BLOCK_INPUT; - -#ifdef MSDOS - /* We only can set screen dimensions to certain values supported - by our video hardware. Try to find the smallest size greater - or equal to the requested dimensions. */ - dos_set_window_size (&newheight, &newwidth); -#endif - - if (newheight != FRAME_HEIGHT (frame)) - { - if (FRAME_HAS_MINIBUF_P (frame) - && ! FRAME_MINIBUF_ONLY_P (frame)) - { - /* Frame has both root and minibuffer. */ - set_window_height (FRAME_ROOT_WINDOW (frame), - newheight - 1 - FRAME_MENU_BAR_LINES (frame), 0); - XSETFASTINT (XWINDOW (FRAME_MINIBUF_WINDOW (frame))->top, - newheight - 1); - set_window_height (FRAME_MINIBUF_WINDOW (frame), 1, 0); - } - else - /* Frame has just one top-level window. */ - set_window_height (FRAME_ROOT_WINDOW (frame), - newheight - FRAME_MENU_BAR_LINES (frame), 0); - - if (FRAME_TERMCAP_P (frame) && !pretend) - FrameRows = newheight; - -#if 0 - if (frame->output_method == output_termcap) - { - frame_height = newheight; - if (!pretend) - FrameRows = newheight; - } -#endif - } - - if (new_frame_window_width != FRAME_WINDOW_WIDTH (frame)) - { - set_window_width (FRAME_ROOT_WINDOW (frame), new_frame_window_width, 0); - if (FRAME_HAS_MINIBUF_P (frame)) - set_window_width (FRAME_MINIBUF_WINDOW (frame), new_frame_window_width, 0); - - if (FRAME_TERMCAP_P (frame) && !pretend) - FrameCols = newwidth; -#if 0 - if (frame->output_method == output_termcap) - { - frame_width = newwidth; - if (!pretend) - FrameCols = newwidth; - } -#endif - } - - FRAME_HEIGHT (frame) = newheight; - SET_FRAME_WIDTH (frame, newwidth); - - if (FRAME_CURSOR_X (frame) >= FRAME_WINDOW_WIDTH (frame)) - FRAME_CURSOR_X (frame) = FRAME_WINDOW_WIDTH (frame) - 1; - if (FRAME_CURSOR_Y (frame) >= FRAME_HEIGHT (frame)) - FRAME_CURSOR_Y (frame) = FRAME_HEIGHT (frame) - 1; - - remake_frame_glyphs (frame); - calculate_costs (frame); - - UNBLOCK_INPUT; -} - -DEFUN ("send-string-to-terminal", Fsend_string_to_terminal, - Ssend_string_to_terminal, 1, 1, 0, - "Send STRING to the terminal without alteration.\n\ -Control characters in STRING will have terminal-dependent effects.") - (string) - Lisp_Object string; -{ - CHECK_STRING (string, 0); - fwrite (XSTRING (string)->data, 1, XSTRING (string)->size, stdout); - fflush (stdout); - if (termscript) - { - fwrite (XSTRING (string)->data, 1, XSTRING (string)->size, termscript); - fflush (termscript); - } - return Qnil; -} - -DEFUN ("ding", Fding, Sding, 0, 1, 0, - "Beep, or flash the screen.\n\ -Also, unless an argument is given,\n\ -terminate any keyboard macro currently executing.") - (arg) - Lisp_Object arg; -{ - if (!NILP (arg)) - { - if (noninteractive) - putchar (07); - else - ring_bell (); - fflush (stdout); - } - else - bitch_at_user (); - - return Qnil; -} - -bitch_at_user () -{ - if (noninteractive) - putchar (07); - else if (!INTERACTIVE) /* Stop executing a keyboard macro. */ - error ("Keyboard macro terminated by a command ringing the bell"); - else - ring_bell (); - fflush (stdout); -} - -DEFUN ("sleep-for", Fsleep_for, Ssleep_for, 1, 2, 0, - "Pause, without updating display, for SECONDS seconds.\n\ -SECONDS may be a floating-point value, meaning that you can wait for a\n\ -fraction of a second. Optional second arg MILLISECONDS specifies an\n\ -additional wait period, in milliseconds; this may be useful if your\n\ -Emacs was built without floating point support.\n\ -\(Not all operating systems support waiting for a fraction of a second.)") - (seconds, milliseconds) - Lisp_Object seconds, milliseconds; -{ - int sec, usec; - - if (NILP (milliseconds)) - XSETINT (milliseconds, 0); - else - CHECK_NUMBER (milliseconds, 1); - usec = XINT (milliseconds) * 1000; - -#ifdef LISP_FLOAT_TYPE - { - double duration = extract_float (seconds); - sec = (int) duration; - usec += (duration - sec) * 1000000; - } -#else - CHECK_NUMBER (seconds, 0); - sec = XINT (seconds); -#endif - -#ifndef EMACS_HAS_USECS - if (sec == 0 && usec != 0) - error ("millisecond `sleep-for' not supported on %s", SYSTEM_TYPE); -#endif - - /* Assure that 0 <= usec < 1000000. */ - if (usec < 0) - { - /* We can't rely on the rounding being correct if user is negative. */ - if (-1000000 < usec) - sec--, usec += 1000000; - else - sec -= -usec / 1000000, usec = 1000000 - (-usec % 1000000); - } - else - sec += usec / 1000000, usec %= 1000000; - - if (sec < 0 || (sec == 0 && usec == 0)) - return Qnil; - - { - Lisp_Object zero; - - XSETFASTINT (zero, 0); - wait_reading_process_input (sec, usec, zero, 0); - } - - /* We should always have wait_reading_process_input; we have a dummy - implementation for systems which don't support subprocesses. */ -#if 0 - /* No wait_reading_process_input */ - immediate_quit = 1; - QUIT; - -#ifdef VMS - sys_sleep (sec); -#else /* not VMS */ -/* The reason this is done this way - (rather than defined (H_S) && defined (H_T)) - is because the VMS preprocessor doesn't grok `defined' */ -#ifdef HAVE_SELECT - EMACS_GET_TIME (end_time); - EMACS_SET_SECS_USECS (timeout, sec, usec); - EMACS_ADD_TIME (end_time, end_time, timeout); - - while (1) - { - EMACS_GET_TIME (timeout); - EMACS_SUB_TIME (timeout, end_time, timeout); - if (EMACS_TIME_NEG_P (timeout) - || !select (1, 0, 0, 0, &timeout)) - break; - } -#else /* not HAVE_SELECT */ - sleep (sec); -#endif /* HAVE_SELECT */ -#endif /* not VMS */ - - immediate_quit = 0; -#endif /* no subprocesses */ - - return Qnil; -} - -/* This is just like wait_reading_process_input, except that - it does the redisplay. - - It's also much like Fsit_for, except that it can be used for - waiting for input as well. */ - -Lisp_Object -sit_for (sec, usec, reading, display) - int sec, usec, reading, display; -{ - Lisp_Object read_kbd; - - swallow_events (display); - - if (detect_input_pending_run_timers (display)) - return Qnil; - - if (display) - redisplay_preserve_echo_area (); - - if (sec == 0 && usec == 0) - return Qt; - -#ifdef SIGIO - gobble_input (0); -#endif - - XSETINT (read_kbd, reading ? -1 : 1); - wait_reading_process_input (sec, usec, read_kbd, display); - - - /* wait_reading_process_input should always be available now; it is - simulated in a simple way on systems that don't support - subprocesses. */ -#if 0 - /* No wait_reading_process_input available. */ - immediate_quit = 1; - QUIT; - - waitchannels = 1; -#ifdef VMS - input_wait_timeout (XINT (arg)); -#else /* not VMS */ -#ifndef HAVE_TIMEVAL - timeout_sec = sec; - select (1, &waitchannels, 0, 0, &timeout_sec); -#else /* HAVE_TIMEVAL */ - timeout.tv_sec = sec; - timeout.tv_usec = usec; - select (1, &waitchannels, 0, 0, &timeout); -#endif /* HAVE_TIMEVAL */ -#endif /* not VMS */ - - immediate_quit = 0; -#endif - - return detect_input_pending () ? Qnil : Qt; -} - -DEFUN ("sit-for", Fsit_for, Ssit_for, 1, 3, 0, - "Perform redisplay, then wait for SECONDS seconds or until input is available.\n\ -SECONDS may be a floating-point value, meaning that you can wait for a\n\ -fraction of a second. Optional second arg MILLISECONDS specifies an\n\ -additional wait period, in milliseconds; this may be useful if your\n\ -Emacs was built without floating point support.\n\ -\(Not all operating systems support waiting for a fraction of a second.)\n\ -Optional third arg NODISP non-nil means don't redisplay, just wait for input.\n\ -Redisplay is preempted as always if input arrives, and does not happen\n\ -if input is available before it starts.\n\ -Value is t if waited the full time with no input arriving.") - (seconds, milliseconds, nodisp) - Lisp_Object seconds, milliseconds, nodisp; -{ - int sec, usec; - - if (NILP (milliseconds)) - XSETINT (milliseconds, 0); - else - CHECK_NUMBER (milliseconds, 1); - usec = XINT (milliseconds) * 1000; - -#ifdef LISP_FLOAT_TYPE - { - double duration = extract_float (seconds); - sec = (int) duration; - usec += (duration - sec) * 1000000; - } -#else - CHECK_NUMBER (seconds, 0); - sec = XINT (seconds); -#endif - -#ifndef EMACS_HAS_USECS - if (usec != 0 && sec == 0) - error ("millisecond `sit-for' not supported on %s", SYSTEM_TYPE); -#endif - - return sit_for (sec, usec, 0, NILP (nodisp)); -} - -char *terminal_type; - -/* Initialization done when Emacs fork is started, before doing stty. */ -/* Determine terminal type and set terminal_driver */ -/* Then invoke its decoding routine to set up variables - in the terminal package */ - -init_display () -{ -#ifdef HAVE_X_WINDOWS - extern int display_arg; -#endif - - meta_key = 0; - inverse_video = 0; - cursor_in_echo_area = 0; - terminal_type = (char *) 0; - - /* Now is the time to initialize this; it's used by init_sys_modes - during startup. */ - Vwindow_system = Qnil; - - /* If the user wants to use a window system, we shouldn't bother - initializing the terminal. This is especially important when the - terminal is so dumb that emacs gives up before and doesn't bother - using the window system. - - If the DISPLAY environment variable is set and nonempty, - try to use X, and die with an error message if that doesn't work. */ - -#ifdef HAVE_X_WINDOWS - if (! display_arg) - { - char *display; -#ifdef VMS - display = getenv ("DECW$DISPLAY"); -#else - display = getenv ("DISPLAY"); -#endif - - display_arg = (display != 0 && *display != 0); - } - - if (!inhibit_window_system && display_arg && initialized) - { - Vwindow_system = intern ("x"); -#ifdef HAVE_X11 - Vwindow_system_version = make_number (11); -#else - Vwindow_system_version = make_number (10); -#endif -#if defined (LINUX) && defined (HAVE_LIBNCURSES) - /* In some versions of ncurses, - tputs crashes if we have not called tgetent. - So call tgetent. */ - { char b[2044]; tgetent (b, "xterm");} -#endif - return; - } -#endif /* HAVE_X_WINDOWS */ - -#ifdef HAVE_NTGUI - if (!inhibit_window_system) - { - Vwindow_system = intern ("w32"); - Vwindow_system_version = make_number (1); - return; - } -#endif /* HAVE_NTGUI */ - - /* If no window system has been specified, try to use the terminal. */ - if (! isatty (0)) - { - fprintf (stderr, "emacs: standard input is not a tty\n"); - exit (1); - } - - /* Look at the TERM variable */ - terminal_type = (char *) getenv ("TERM"); - if (!terminal_type) - { -#ifdef VMS - fprintf (stderr, "Please specify your terminal type.\n\ -For types defined in VMS, use set term /device=TYPE.\n\ -For types not defined in VMS, use define emacs_term \"TYPE\".\n\ -\(The quotation marks are necessary since terminal types are lower case.)\n"); -#else - fprintf (stderr, "Please set the environment variable TERM; see tset(1).\n"); -#endif - exit (1); - } - -#ifdef VMS - /* VMS DCL tends to upcase things, so downcase term type. - Hardly any uppercase letters in terminal types; should be none. */ - { - char *new = (char *) xmalloc (strlen (terminal_type) + 1); - char *p; - - strcpy (new, terminal_type); - - for (p = new; *p; p++) - if (isupper (*p)) - *p = tolower (*p); - - terminal_type = new; - } -#endif - - term_init (terminal_type); - - remake_frame_glyphs (selected_frame); - calculate_costs (selected_frame); - - /* X and Y coordinates of the cursor between updates. */ - FRAME_CURSOR_X (selected_frame) = 0; - FRAME_CURSOR_Y (selected_frame) = 0; - -#ifdef SIGWINCH -#ifndef CANNOT_DUMP - if (initialized) -#endif /* CANNOT_DUMP */ - signal (SIGWINCH, window_change_signal); -#endif /* SIGWINCH */ -} - -syms_of_display () -{ - defsubr (&Sredraw_frame); - defsubr (&Sredraw_display); - defsubr (&Sframe_or_buffer_changed_p); - defsubr (&Sopen_termscript); - defsubr (&Sding); - defsubr (&Ssit_for); - defsubr (&Ssleep_for); - defsubr (&Ssend_string_to_terminal); - - frame_and_buffer_state = Fmake_vector (make_number (20), Qlambda); - staticpro (&frame_and_buffer_state); - - Qdisplay_table = intern ("display-table"); - staticpro (&Qdisplay_table); - - DEFVAR_INT ("baud-rate", &baud_rate, - "*The output baud rate of the terminal.\n\ -On most systems, changing this value will affect the amount of padding\n\ -and the other strategic decisions made during redisplay."); - DEFVAR_BOOL ("inverse-video", &inverse_video, - "*Non-nil means invert the entire frame display.\n\ -This means everything is in inverse video which otherwise would not be."); - DEFVAR_BOOL ("visible-bell", &visible_bell, - "*Non-nil means try to flash the frame to represent a bell."); - DEFVAR_BOOL ("no-redraw-on-reenter", &no_redraw_on_reenter, - "*Non-nil means no need to redraw entire frame after suspending.\n\ -A non-nil value is useful if the terminal can automatically preserve\n\ -Emacs's frame display when you reenter Emacs.\n\ -It is up to you to set this variable if your terminal can do that."); - DEFVAR_LISP ("window-system", &Vwindow_system, - "A symbol naming the window-system under which Emacs is running\n\ -\(such as `x'), or nil if emacs is running on an ordinary terminal."); - DEFVAR_LISP ("window-system-version", &Vwindow_system_version, - "The version number of the window system in use.\n\ -For X windows, this is 10 or 11."); - DEFVAR_BOOL ("cursor-in-echo-area", &cursor_in_echo_area, - "Non-nil means put cursor in minibuffer, at end of any message there."); - DEFVAR_LISP ("glyph-table", &Vglyph_table, - "Table defining how to output a glyph code to the frame.\n\ -If not nil, this is a vector indexed by glyph code to define the glyph.\n\ -Each element can be:\n\ - integer: a glyph code which this glyph is an alias for.\n\ - string: output this glyph using that string (not impl. in X windows).\n\ - nil: this glyph mod 256 is char code to output,\n\ - and this glyph / 256 is face code for X windows (see `face-id')."); - Vglyph_table = Qnil; - - DEFVAR_LISP ("standard-display-table", &Vstandard_display_table, - "Display table to use for buffers that specify none.\n\ -See `buffer-display-table' for more information."); - Vstandard_display_table = Qnil; - - /* Initialize `window-system', unless init_display already decided it. */ -#ifdef CANNOT_DUMP - if (noninteractive) -#endif - { - Vwindow_system = Qnil; - Vwindow_system_version = Qnil; - } -} |