/
term.c
3745 lines (3155 loc) · 105 KB
/
term.c
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/* Terminal control module for terminals described by TERMCAP
Copyright (C) 1985-1987, 1993-1995, 1998, 2000-2011
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 3 of the License, 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. If not, see <http://www.gnu.org/licenses/>. */
/* New redisplay, TTY faces by Gerd Moellmann <gerd@gnu.org>. */
#include <config.h>
#include <stdio.h>
#include <ctype.h>
#include <errno.h>
#include <sys/file.h>
#include <unistd.h>
#include <signal.h>
#include <setjmp.h>
#include "lisp.h"
#include "termchar.h"
#include "termopts.h"
#include "tparam.h"
#include "buffer.h"
#include "character.h"
#include "charset.h"
#include "coding.h"
#include "composite.h"
#include "keyboard.h"
#include "frame.h"
#include "disptab.h"
#include "termhooks.h"
#include "dispextern.h"
#include "window.h"
#include "keymap.h"
#include "blockinput.h"
#include "syssignal.h"
#include "systty.h"
#include "intervals.h"
#ifdef MSDOS
#include "msdos.h"
static int been_here = -1;
#endif
#include "cm.h"
#ifdef HAVE_X_WINDOWS
#include "xterm.h"
#endif
#ifndef O_RDWR
#define O_RDWR 2
#endif
#ifndef O_NOCTTY
#define O_NOCTTY 0
#endif
/* The name of the default console device. */
#ifdef WINDOWSNT
#define DEV_TTY "CONOUT$"
#else
#define DEV_TTY "/dev/tty"
#endif
static void tty_set_scroll_region (struct frame *f, int start, int stop);
static void turn_on_face (struct frame *, int face_id);
static void turn_off_face (struct frame *, int face_id);
static void tty_turn_off_highlight (struct tty_display_info *);
static void tty_show_cursor (struct tty_display_info *);
static void tty_hide_cursor (struct tty_display_info *);
static void tty_background_highlight (struct tty_display_info *tty);
static struct terminal *get_tty_terminal (Lisp_Object, int);
static void clear_tty_hooks (struct terminal *terminal);
static void set_tty_hooks (struct terminal *terminal);
static void dissociate_if_controlling_tty (int fd);
static void delete_tty (struct terminal *);
static void maybe_fatal (int must_succeed, struct terminal *terminal,
const char *str1, const char *str2, ...)
NO_RETURN ATTRIBUTE_FORMAT_PRINTF (3, 5) ATTRIBUTE_FORMAT_PRINTF (4, 5);
static void vfatal (const char *str, va_list ap)
NO_RETURN ATTRIBUTE_FORMAT_PRINTF (1, 0);
#define OUTPUT(tty, a) \
emacs_tputs ((tty), a, \
(int) (FRAME_LINES (XFRAME (selected_frame)) \
- curY (tty)), \
cmputc)
#define OUTPUT1(tty, a) emacs_tputs ((tty), a, 1, cmputc)
#define OUTPUTL(tty, a, lines) emacs_tputs ((tty), a, lines, cmputc)
#define OUTPUT_IF(tty, a) \
do { \
if (a) \
OUTPUT (tty, a); \
} while (0)
#define OUTPUT1_IF(tty, a) do { if (a) emacs_tputs ((tty), a, 1, cmputc); } while (0)
/* Display space properties */
/* Chain of all tty device parameters. */
struct tty_display_info *tty_list;
/* Meaning of bits in no_color_video. Each bit set means that the
corresponding attribute cannot be combined with colors. */
enum no_color_bit
{
NC_STANDOUT = 1 << 0,
NC_UNDERLINE = 1 << 1,
NC_REVERSE = 1 << 2,
NC_BLINK = 1 << 3,
NC_DIM = 1 << 4,
NC_BOLD = 1 << 5,
NC_INVIS = 1 << 6,
NC_PROTECT = 1 << 7,
NC_ALT_CHARSET = 1 << 8
};
/* internal state */
/* The largest frame width in any call to calculate_costs. */
static int max_frame_cols;
/* The largest frame height in any call to calculate_costs. */
static int max_frame_lines;
/* Non-zero if we have dropped our controlling tty and therefore
should not open a frame on stdout. */
static int no_controlling_tty;
#ifdef HAVE_GPM
#include <sys/fcntl.h>
/* The device for which we have enabled gpm support (or NULL). */
struct tty_display_info *gpm_tty = NULL;
/* Last recorded mouse coordinates. */
static int last_mouse_x, last_mouse_y;
#endif /* HAVE_GPM */
/* Ring the bell on a tty. */
static void
tty_ring_bell (struct frame *f)
{
struct tty_display_info *tty = FRAME_TTY (f);
if (tty->output)
{
OUTPUT (tty, (tty->TS_visible_bell && visible_bell
? tty->TS_visible_bell
: tty->TS_bell));
fflush (tty->output);
}
}
/* Set up termcap modes for Emacs. */
static void
tty_set_terminal_modes (struct terminal *terminal)
{
struct tty_display_info *tty = terminal->display_info.tty;
if (tty->output)
{
if (tty->TS_termcap_modes)
OUTPUT (tty, tty->TS_termcap_modes);
else
{
/* Output enough newlines to scroll all the old screen contents
off the screen, so it won't be overwritten and lost. */
int i;
current_tty = tty;
for (i = 0; i < FRAME_LINES (XFRAME (selected_frame)); i++)
cmputc ('\n');
}
OUTPUT_IF (tty, visible_cursor ? tty->TS_cursor_visible : tty->TS_cursor_normal);
OUTPUT_IF (tty, tty->TS_keypad_mode);
losecursor (tty);
fflush (tty->output);
}
}
/* Reset termcap modes before exiting Emacs. */
static void
tty_reset_terminal_modes (struct terminal *terminal)
{
struct tty_display_info *tty = terminal->display_info.tty;
if (tty->output)
{
tty_turn_off_highlight (tty);
tty_turn_off_insert (tty);
OUTPUT_IF (tty, tty->TS_end_keypad_mode);
OUTPUT_IF (tty, tty->TS_cursor_normal);
OUTPUT_IF (tty, tty->TS_end_termcap_modes);
OUTPUT_IF (tty, tty->TS_orig_pair);
/* Output raw CR so kernel can track the cursor hpos. */
current_tty = tty;
cmputc ('\r');
fflush (tty->output);
}
}
/* Flag the end of a display update on a termcap terminal. */
static void
tty_update_end (struct frame *f)
{
struct tty_display_info *tty = FRAME_TTY (f);
if (!XWINDOW (selected_window)->cursor_off_p)
tty_show_cursor (tty);
tty_turn_off_insert (tty);
tty_background_highlight (tty);
}
/* The implementation of set_terminal_window for termcap frames. */
static void
tty_set_terminal_window (struct frame *f, int size)
{
struct tty_display_info *tty = FRAME_TTY (f);
tty->specified_window = size ? size : FRAME_LINES (f);
if (FRAME_SCROLL_REGION_OK (f))
tty_set_scroll_region (f, 0, tty->specified_window);
}
static void
tty_set_scroll_region (struct frame *f, int start, int stop)
{
char *buf;
struct tty_display_info *tty = FRAME_TTY (f);
if (tty->TS_set_scroll_region)
buf = tparam (tty->TS_set_scroll_region, 0, 0, start, stop - 1, 0, 0);
else if (tty->TS_set_scroll_region_1)
buf = tparam (tty->TS_set_scroll_region_1, 0, 0,
FRAME_LINES (f), start,
FRAME_LINES (f) - stop,
FRAME_LINES (f));
else
buf = tparam (tty->TS_set_window, 0, 0, start, 0, stop, FRAME_COLS (f));
OUTPUT (tty, buf);
xfree (buf);
losecursor (tty);
}
static void
tty_turn_on_insert (struct tty_display_info *tty)
{
if (!tty->insert_mode)
OUTPUT (tty, tty->TS_insert_mode);
tty->insert_mode = 1;
}
void
tty_turn_off_insert (struct tty_display_info *tty)
{
if (tty->insert_mode)
OUTPUT (tty, tty->TS_end_insert_mode);
tty->insert_mode = 0;
}
/* Handle highlighting. */
static void
tty_turn_off_highlight (struct tty_display_info *tty)
{
if (tty->standout_mode)
OUTPUT_IF (tty, tty->TS_end_standout_mode);
tty->standout_mode = 0;
}
static void
tty_turn_on_highlight (struct tty_display_info *tty)
{
if (!tty->standout_mode)
OUTPUT_IF (tty, tty->TS_standout_mode);
tty->standout_mode = 1;
}
static void
tty_toggle_highlight (struct tty_display_info *tty)
{
if (tty->standout_mode)
tty_turn_off_highlight (tty);
else
tty_turn_on_highlight (tty);
}
/* Make cursor invisible. */
static void
tty_hide_cursor (struct tty_display_info *tty)
{
if (tty->cursor_hidden == 0)
{
tty->cursor_hidden = 1;
OUTPUT_IF (tty, tty->TS_cursor_invisible);
}
}
/* Ensure that cursor is visible. */
static void
tty_show_cursor (struct tty_display_info *tty)
{
if (tty->cursor_hidden)
{
tty->cursor_hidden = 0;
OUTPUT_IF (tty, tty->TS_cursor_normal);
if (visible_cursor)
OUTPUT_IF (tty, tty->TS_cursor_visible);
}
}
/* Set standout mode to the state it should be in for
empty space inside windows. What this is,
depends on the user option inverse-video. */
static void
tty_background_highlight (struct tty_display_info *tty)
{
if (inverse_video)
tty_turn_on_highlight (tty);
else
tty_turn_off_highlight (tty);
}
/* Set standout mode to the mode specified for the text to be output. */
static void
tty_highlight_if_desired (struct tty_display_info *tty)
{
if (inverse_video)
tty_turn_on_highlight (tty);
else
tty_turn_off_highlight (tty);
}
/* Move cursor to row/column position VPOS/HPOS. HPOS/VPOS are
frame-relative coordinates. */
static void
tty_cursor_to (struct frame *f, int vpos, int hpos)
{
struct tty_display_info *tty = FRAME_TTY (f);
/* Detect the case where we are called from reset_sys_modes
and the costs have never been calculated. Do nothing. */
if (! tty->costs_set)
return;
if (curY (tty) == vpos
&& curX (tty) == hpos)
return;
if (!tty->TF_standout_motion)
tty_background_highlight (tty);
if (!tty->TF_insmode_motion)
tty_turn_off_insert (tty);
cmgoto (tty, vpos, hpos);
}
/* Similar but don't take any account of the wasted characters. */
static void
tty_raw_cursor_to (struct frame *f, int row, int col)
{
struct tty_display_info *tty = FRAME_TTY (f);
if (curY (tty) == row
&& curX (tty) == col)
return;
if (!tty->TF_standout_motion)
tty_background_highlight (tty);
if (!tty->TF_insmode_motion)
tty_turn_off_insert (tty);
cmgoto (tty, row, col);
}
/* Erase operations */
/* Clear from cursor to end of frame on a termcap device. */
static void
tty_clear_to_end (struct frame *f)
{
register int i;
struct tty_display_info *tty = FRAME_TTY (f);
if (tty->TS_clr_to_bottom)
{
tty_background_highlight (tty);
OUTPUT (tty, tty->TS_clr_to_bottom);
}
else
{
for (i = curY (tty); i < FRAME_LINES (f); i++)
{
cursor_to (f, i, 0);
clear_end_of_line (f, FRAME_COLS (f));
}
}
}
/* Clear an entire termcap frame. */
static void
tty_clear_frame (struct frame *f)
{
struct tty_display_info *tty = FRAME_TTY (f);
if (tty->TS_clr_frame)
{
tty_background_highlight (tty);
OUTPUT (tty, tty->TS_clr_frame);
cmat (tty, 0, 0);
}
else
{
cursor_to (f, 0, 0);
clear_to_end (f);
}
}
/* An implementation of clear_end_of_line for termcap frames.
Note that the cursor may be moved, on terminals lacking a `ce' string. */
static void
tty_clear_end_of_line (struct frame *f, int first_unused_hpos)
{
register int i;
struct tty_display_info *tty = FRAME_TTY (f);
/* Detect the case where we are called from reset_sys_modes
and the costs have never been calculated. Do nothing. */
if (! tty->costs_set)
return;
if (curX (tty) >= first_unused_hpos)
return;
tty_background_highlight (tty);
if (tty->TS_clr_line)
{
OUTPUT1 (tty, tty->TS_clr_line);
}
else
{ /* have to do it the hard way */
tty_turn_off_insert (tty);
/* Do not write in last row last col with Auto-wrap on. */
if (AutoWrap (tty)
&& curY (tty) == FrameRows (tty) - 1
&& first_unused_hpos == FrameCols (tty))
first_unused_hpos--;
for (i = curX (tty); i < first_unused_hpos; i++)
{
if (tty->termscript)
fputc (' ', tty->termscript);
fputc (' ', tty->output);
}
cmplus (tty, first_unused_hpos - curX (tty));
}
}
/* Buffers to store the source and result of code conversion for terminal. */
static unsigned char *encode_terminal_src;
static unsigned char *encode_terminal_dst;
/* Allocated sizes of the above buffers. */
static int encode_terminal_src_size;
static int encode_terminal_dst_size;
/* Encode SRC_LEN glyphs starting at SRC to terminal output codes.
Set CODING->produced to the byte-length of the resulting byte
sequence, and return a pointer to that byte sequence. */
unsigned char *
encode_terminal_code (struct glyph *src, int src_len, struct coding_system *coding)
{
struct glyph *src_end = src + src_len;
unsigned char *buf;
int nchars, nbytes, required;
register int tlen = GLYPH_TABLE_LENGTH;
register Lisp_Object *tbase = GLYPH_TABLE_BASE;
Lisp_Object charset_list;
/* Allocate sufficient size of buffer to store all characters in
multibyte-form. But, it may be enlarged on demand if
Vglyph_table contains a string or a composite glyph is
encountered. */
required = MAX_MULTIBYTE_LENGTH * src_len;
if (encode_terminal_src_size < required)
{
if (encode_terminal_src)
encode_terminal_src = xrealloc (encode_terminal_src, required);
else
encode_terminal_src = xmalloc (required);
encode_terminal_src_size = required;
}
charset_list = coding_charset_list (coding);
buf = encode_terminal_src;
nchars = 0;
while (src < src_end)
{
if (src->type == COMPOSITE_GLYPH)
{
struct composition *cmp IF_LINT (= NULL);
Lisp_Object gstring IF_LINT (= Qnil);
int i;
nbytes = buf - encode_terminal_src;
if (src->u.cmp.automatic)
{
gstring = composition_gstring_from_id (src->u.cmp.id);
required = src->slice.cmp.to + 1 - src->slice.cmp.from;
}
else
{
cmp = composition_table[src->u.cmp.id];
required = MAX_MULTIBYTE_LENGTH * cmp->glyph_len;
}
if (encode_terminal_src_size < nbytes + required)
{
encode_terminal_src_size = nbytes + required;
encode_terminal_src = xrealloc (encode_terminal_src,
encode_terminal_src_size);
buf = encode_terminal_src + nbytes;
}
if (src->u.cmp.automatic)
for (i = src->slice.cmp.from; i <= src->slice.cmp.to; i++)
{
Lisp_Object g = LGSTRING_GLYPH (gstring, i);
int c = LGLYPH_CHAR (g);
if (! char_charset (c, charset_list, NULL))
c = '?';
buf += CHAR_STRING (c, buf);
nchars++;
}
else
for (i = 0; i < cmp->glyph_len; i++)
{
int c = COMPOSITION_GLYPH (cmp, i);
if (c == '\t')
continue;
if (char_charset (c, charset_list, NULL))
{
if (CHAR_WIDTH (c) == 0
&& i > 0 && COMPOSITION_GLYPH (cmp, i - 1) == '\t')
/* Should be left-padded */
{
buf += CHAR_STRING (' ', buf);
nchars++;
}
}
else
c = '?';
buf += CHAR_STRING (c, buf);
nchars++;
}
}
/* We must skip glyphs to be padded for a wide character. */
else if (! CHAR_GLYPH_PADDING_P (*src))
{
GLYPH g;
int c IF_LINT (= 0);
Lisp_Object string;
string = Qnil;
SET_GLYPH_FROM_CHAR_GLYPH (g, src[0]);
if (GLYPH_INVALID_P (g) || GLYPH_SIMPLE_P (tbase, tlen, g))
{
/* This glyph doesn't have an entry in Vglyph_table. */
c = src->u.ch;
}
else
{
/* This glyph has an entry in Vglyph_table,
so process any alias before testing for simpleness. */
GLYPH_FOLLOW_ALIASES (tbase, tlen, g);
if (GLYPH_SIMPLE_P (tbase, tlen, g))
/* We set the multi-byte form of a character in G
(that should be an ASCII character) at WORKBUF. */
c = GLYPH_CHAR (g);
else
/* We have a string in Vglyph_table. */
string = tbase[GLYPH_CHAR (g)];
}
if (NILP (string))
{
nbytes = buf - encode_terminal_src;
if (encode_terminal_src_size < nbytes + MAX_MULTIBYTE_LENGTH)
{
encode_terminal_src_size = nbytes + MAX_MULTIBYTE_LENGTH;
encode_terminal_src = xrealloc (encode_terminal_src,
encode_terminal_src_size);
buf = encode_terminal_src + nbytes;
}
if (CHAR_BYTE8_P (c)
|| char_charset (c, charset_list, NULL))
{
/* Store the multibyte form of C at BUF. */
buf += CHAR_STRING (c, buf);
nchars++;
}
else
{
/* C is not encodable. */
*buf++ = '?';
nchars++;
while (src + 1 < src_end && CHAR_GLYPH_PADDING_P (src[1]))
{
*buf++ = '?';
nchars++;
src++;
}
}
}
else
{
if (! STRING_MULTIBYTE (string))
string = string_to_multibyte (string);
nbytes = buf - encode_terminal_src;
if (encode_terminal_src_size < nbytes + SBYTES (string))
{
encode_terminal_src_size = nbytes + SBYTES (string);
encode_terminal_src = xrealloc (encode_terminal_src,
encode_terminal_src_size);
buf = encode_terminal_src + nbytes;
}
memcpy (buf, SDATA (string), SBYTES (string));
buf += SBYTES (string);
nchars += SCHARS (string);
}
}
src++;
}
if (nchars == 0)
{
coding->produced = 0;
return NULL;
}
nbytes = buf - encode_terminal_src;
coding->source = encode_terminal_src;
if (encode_terminal_dst_size == 0)
{
encode_terminal_dst_size = encode_terminal_src_size;
if (encode_terminal_dst)
encode_terminal_dst = xrealloc (encode_terminal_dst,
encode_terminal_dst_size);
else
encode_terminal_dst = xmalloc (encode_terminal_dst_size);
}
coding->destination = encode_terminal_dst;
coding->dst_bytes = encode_terminal_dst_size;
encode_coding_object (coding, Qnil, 0, 0, nchars, nbytes, Qnil);
/* coding->destination may have been reallocated. */
encode_terminal_dst = coding->destination;
encode_terminal_dst_size = coding->dst_bytes;
return (encode_terminal_dst);
}
/* An implementation of write_glyphs for termcap frames. */
static void
tty_write_glyphs (struct frame *f, struct glyph *string, int len)
{
unsigned char *conversion_buffer;
struct coding_system *coding;
size_t n, stringlen;
struct tty_display_info *tty = FRAME_TTY (f);
tty_turn_off_insert (tty);
tty_hide_cursor (tty);
/* Don't dare write in last column of bottom line, if Auto-Wrap,
since that would scroll the whole frame on some terminals. */
if (AutoWrap (tty)
&& curY (tty) + 1 == FRAME_LINES (f)
&& (curX (tty) + len) == FRAME_COLS (f))
len --;
if (len <= 0)
return;
cmplus (tty, len);
/* If terminal_coding does any conversion, use it, otherwise use
safe_terminal_coding. We can't use CODING_REQUIRE_ENCODING here
because it always return 1 if the member src_multibyte is 1. */
coding = (FRAME_TERMINAL_CODING (f)->common_flags & CODING_REQUIRE_ENCODING_MASK
? FRAME_TERMINAL_CODING (f) : &safe_terminal_coding);
/* The mode bit CODING_MODE_LAST_BLOCK should be set to 1 only at
the tail. */
coding->mode &= ~CODING_MODE_LAST_BLOCK;
for (stringlen = len; stringlen != 0; stringlen -= n)
{
/* Identify a run of glyphs with the same face. */
int face_id = string->face_id;
for (n = 1; n < stringlen; ++n)
if (string[n].face_id != face_id)
break;
/* Turn appearance modes of the face of the run on. */
tty_highlight_if_desired (tty);
turn_on_face (f, face_id);
if (n == stringlen)
/* This is the last run. */
coding->mode |= CODING_MODE_LAST_BLOCK;
conversion_buffer = encode_terminal_code (string, n, coding);
if (coding->produced > 0)
{
BLOCK_INPUT;
fwrite (conversion_buffer, 1, coding->produced, tty->output);
if (ferror (tty->output))
clearerr (tty->output);
if (tty->termscript)
fwrite (conversion_buffer, 1, coding->produced, tty->termscript);
UNBLOCK_INPUT;
}
string += n;
/* Turn appearance modes off. */
turn_off_face (f, face_id);
tty_turn_off_highlight (tty);
}
cmcheckmagic (tty);
}
#ifdef HAVE_GPM /* Only used by GPM code. */
static void
tty_write_glyphs_with_face (register struct frame *f, register struct glyph *string,
register int len, register int face_id)
{
unsigned char *conversion_buffer;
struct coding_system *coding;
struct tty_display_info *tty = FRAME_TTY (f);
tty_turn_off_insert (tty);
tty_hide_cursor (tty);
/* Don't dare write in last column of bottom line, if Auto-Wrap,
since that would scroll the whole frame on some terminals. */
if (AutoWrap (tty)
&& curY (tty) + 1 == FRAME_LINES (f)
&& (curX (tty) + len) == FRAME_COLS (f))
len --;
if (len <= 0)
return;
cmplus (tty, len);
/* If terminal_coding does any conversion, use it, otherwise use
safe_terminal_coding. We can't use CODING_REQUIRE_ENCODING here
because it always return 1 if the member src_multibyte is 1. */
coding = (FRAME_TERMINAL_CODING (f)->common_flags & CODING_REQUIRE_ENCODING_MASK
? FRAME_TERMINAL_CODING (f) : &safe_terminal_coding);
/* The mode bit CODING_MODE_LAST_BLOCK should be set to 1 only at
the tail. */
coding->mode &= ~CODING_MODE_LAST_BLOCK;
/* Turn appearance modes of the face. */
tty_highlight_if_desired (tty);
turn_on_face (f, face_id);
coding->mode |= CODING_MODE_LAST_BLOCK;
conversion_buffer = encode_terminal_code (string, len, coding);
if (coding->produced > 0)
{
BLOCK_INPUT;
fwrite (conversion_buffer, 1, coding->produced, tty->output);
if (ferror (tty->output))
clearerr (tty->output);
if (tty->termscript)
fwrite (conversion_buffer, 1, coding->produced, tty->termscript);
UNBLOCK_INPUT;
}
/* Turn appearance modes off. */
turn_off_face (f, face_id);
tty_turn_off_highlight (tty);
cmcheckmagic (tty);
}
#endif
/* An implementation of insert_glyphs for termcap frames. */
static void
tty_insert_glyphs (struct frame *f, struct glyph *start, int len)
{
char *buf;
struct glyph *glyph = NULL;
unsigned char *conversion_buffer;
unsigned char space[1];
struct coding_system *coding;
struct tty_display_info *tty = FRAME_TTY (f);
if (tty->TS_ins_multi_chars)
{
buf = tparam (tty->TS_ins_multi_chars, 0, 0, len, 0, 0, 0);
OUTPUT1 (tty, buf);
xfree (buf);
if (start)
write_glyphs (f, start, len);
return;
}
tty_turn_on_insert (tty);
cmplus (tty, len);
if (! start)
space[0] = SPACEGLYPH;
/* If terminal_coding does any conversion, use it, otherwise use
safe_terminal_coding. We can't use CODING_REQUIRE_ENCODING here
because it always return 1 if the member src_multibyte is 1. */
coding = (FRAME_TERMINAL_CODING (f)->common_flags & CODING_REQUIRE_ENCODING_MASK
? FRAME_TERMINAL_CODING (f) : &safe_terminal_coding);
/* The mode bit CODING_MODE_LAST_BLOCK should be set to 1 only at
the tail. */
coding->mode &= ~CODING_MODE_LAST_BLOCK;
while (len-- > 0)
{
OUTPUT1_IF (tty, tty->TS_ins_char);
if (!start)
{
conversion_buffer = space;
coding->produced = 1;
}
else
{
tty_highlight_if_desired (tty);
turn_on_face (f, start->face_id);
glyph = start;
++start;
/* We must open sufficient space for a character which
occupies more than one column. */
while (len && CHAR_GLYPH_PADDING_P (*start))
{
OUTPUT1_IF (tty, tty->TS_ins_char);
start++, len--;
}
if (len <= 0)
/* This is the last glyph. */
coding->mode |= CODING_MODE_LAST_BLOCK;
conversion_buffer = encode_terminal_code (glyph, 1, coding);
}
if (coding->produced > 0)
{
BLOCK_INPUT;
fwrite (conversion_buffer, 1, coding->produced, tty->output);
if (ferror (tty->output))
clearerr (tty->output);
if (tty->termscript)
fwrite (conversion_buffer, 1, coding->produced, tty->termscript);
UNBLOCK_INPUT;
}
OUTPUT1_IF (tty, tty->TS_pad_inserted_char);
if (start)
{
turn_off_face (f, glyph->face_id);
tty_turn_off_highlight (tty);
}
}
cmcheckmagic (tty);
}
/* An implementation of delete_glyphs for termcap frames. */
static void
tty_delete_glyphs (struct frame *f, int n)
{
char *buf;
register int i;
struct tty_display_info *tty = FRAME_TTY (f);
if (tty->delete_in_insert_mode)
{
tty_turn_on_insert (tty);
}
else
{
tty_turn_off_insert (tty);
OUTPUT_IF (tty, tty->TS_delete_mode);
}
if (tty->TS_del_multi_chars)
{
buf = tparam (tty->TS_del_multi_chars, 0, 0, n, 0, 0, 0);
OUTPUT1 (tty, buf);
xfree (buf);
}
else
for (i = 0; i < n; i++)
OUTPUT1 (tty, tty->TS_del_char);
if (!tty->delete_in_insert_mode)
OUTPUT_IF (tty, tty->TS_end_delete_mode);
}
/* An implementation of ins_del_lines for termcap frames. */
static void
tty_ins_del_lines (struct frame *f, int vpos, int n)
{
struct tty_display_info *tty = FRAME_TTY (f);
const char *multi =
n > 0 ? tty->TS_ins_multi_lines : tty->TS_del_multi_lines;
const char *single = n > 0 ? tty->TS_ins_line : tty->TS_del_line;
const char *scroll = n > 0 ? tty->TS_rev_scroll : tty->TS_fwd_scroll;
register int i = n > 0 ? n : -n;
register char *buf;
/* If the lines below the insertion are being pushed
into the end of the window, this is the same as clearing;
and we know the lines are already clear, since the matching
deletion has already been done. So can ignore this. */
/* If the lines below the deletion are blank lines coming
out of the end of the window, don't bother,
as there will be a matching inslines later that will flush them. */
if (FRAME_SCROLL_REGION_OK (f)
&& vpos + i >= tty->specified_window)
return;
if (!FRAME_MEMORY_BELOW_FRAME (f)
&& vpos + i >= FRAME_LINES (f))
return;
if (multi)
{
raw_cursor_to (f, vpos, 0);
tty_background_highlight (tty);
buf = tparam (multi, 0, 0, i, 0, 0, 0);
OUTPUT (tty, buf);
xfree (buf);
}
else if (single)
{
raw_cursor_to (f, vpos, 0);
tty_background_highlight (tty);
while (--i >= 0)