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termout.c
5345 lines (5081 loc) · 171 KB
/
termout.c
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// termout.c (part of mintty)
// Copyright 2008-22 Andy Koppe, 2017-22 Thomas Wolff
// Adapted from code from PuTTY-0.60 by Simon Tatham and team.
// Licensed under the terms of the GNU General Public License v3 or later.
#include "termpriv.h"
#include "winpriv.h" // colours, win_get_font, win_change_font, win_led, win_set_scrollview
#include "win.h"
#include "appinfo.h"
#include "charset.h"
#include "child.h"
#include "print.h"
#include "sixel.h"
#include "winimg.h"
#include "tek.h"
#include "base64.h"
#include "unicodever.t"
#include <termios.h>
#include <sys/time.h>
#define TERM_CMD_BUF_INC_STEP 128
#define TERM_CMD_BUF_MAX_SIZE (1024 * 1024)
#define SUB_PARS (1 << (sizeof(*term.csi_argv) * 8 - 1))
/* This combines two characters into one value, for the purpose of pairing
* any modifier byte and the final byte in escape sequences.
*/
#define CPAIR(x, y) ((x) << 8 | (y))
static string primary_da1 = "\e[?1;2c";
static string primary_da2 = "\e[?62;1;2;4;6;9;15;22;29c";
static string primary_da3 = "\e[?63;1;2;4;6;9;15;22;29c";
static string primary_da4 = "\e[?64;1;2;4;6;9;15;21;22;28;29c";
static string primary_da5 = "\e[?65;1;2;4;6;9;15;21;22;28;29c";
/* Registered Extensions to the Character Cell Display Service Class
1 132 Column Display
2 Printer Port
3 ReGIS Display
4 Sixels Display
6 Selectively Erasable Characters
9 National Replacement Character Sets
15 Technical Character Set
21 Horizontal Scrolling
22 Color Text
28 Rectangular Editing
29 Text Locator
*/
static bool
term_push_cmd(char c)
{
uint new_size;
/* Need 1 more for null byte */
if (term.cmd_len + 1 < term.cmd_buf_cap) {
term.cmd_buf[term.cmd_len++] = c;
term.cmd_buf[term.cmd_len] = 0;
return true;
}
if (term.cmd_buf_cap >= TERM_CMD_BUF_MAX_SIZE) {
/* Server sends too many cmd characters */
return false;
}
new_size = term.cmd_buf_cap + TERM_CMD_BUF_INC_STEP;
if (new_size >= TERM_CMD_BUF_MAX_SIZE) {
// cosmetic limitation (relevant limitation above)
new_size = TERM_CMD_BUF_MAX_SIZE;
}
term.cmd_buf = renewn(term.cmd_buf, new_size);
term.cmd_buf_cap = new_size;
term.cmd_buf[term.cmd_len++] = c;
term.cmd_buf[term.cmd_len] = 0;
return true;
}
static void
enable_progress(void)
{
term.lines[term.curs.y]->lattr |= LATTR_PROGRESS;
}
/*
* Move the cursor to a given position, clipping at boundaries.
* We may or may not want to clip at the scroll margin: marg_clip is
* 0 not to,
* 1 to disallow _passing_ the margins, and
* 2 to disallow even _being_ outside the margins.
*/
static void
move(int x, int y, int marg_clip)
{
term_cursor *curs = &term.curs;
if (marg_clip) {
if ((curs->y >= term.marg_top || marg_clip == 2) && y < term.marg_top)
y = term.marg_top;
if ((curs->y <= term.marg_bot || marg_clip == 2) && y > term.marg_bot)
y = term.marg_bot;
if ((curs->x >= term.marg_left || marg_clip == 2) && x < term.marg_left)
x = term.marg_left;
if ((curs->x <= term.marg_right || marg_clip == 2) && x > term.marg_right)
x = term.marg_right;
}
if (x < 0)
x = 0;
if (x >= term.cols)
x = term.cols - 1;
if (y < 0)
y = 0;
if (y >= term.rows)
y = term.rows - 1;
curs->x = x;
curs->y = y;
curs->wrapnext = false;
}
/*
* Save the cursor and SGR mode.
*/
static void
save_cursor(void)
{
term.saved_cursors[term.on_alt_screen] = term.curs;
}
/*
* Restore the cursor and SGR mode.
*/
static void
restore_cursor(void)
{
term_cursor *curs = &term.curs;
*curs = term.saved_cursors[term.on_alt_screen];
term.erase_char.attr = curs->attr;
term.erase_char.attr.attr &= (ATTR_FGMASK | ATTR_BGMASK);
term.erase_char.attr.attr |= TATTR_CLEAR;
/* Make sure the window hasn't shrunk since the save */
if (curs->x >= term.cols)
curs->x = term.cols - 1;
if (curs->y >= term.rows)
curs->y = term.rows - 1;
/* In origin mode, make sure the cursor position is within margins */
if (curs->origin) {
if (curs->x < term.marg_left)
curs->x = term.marg_left;
else if (curs->x > term.marg_right)
curs->x = term.marg_right;
if (curs->y < term.marg_top)
curs->y = term.marg_top;
else if (curs->y > term.marg_bot)
curs->y = term.marg_bot;
}
/*
* wrapnext might reset to False
* if the x position is no longer at the rightmost edge.
*/
if (curs->wrapnext && curs->x < term.cols - 1 && curs->x != term.marg_right)
curs->wrapnext = false;
term_update_cs();
}
/*
* Insert or delete characters within the current line.
* n is +ve if insertion is desired, and -ve for deletion.
*/
static void
insert_char(int n)
{
if (term.curs.x < term.marg_left || term.curs.x > term.marg_right)
return;
bool del = n < 0;
int m;
term_cursor *curs = &term.curs;
termline *line = term.lines[curs->y];
int cols = min(line->cols, line->size);
cols = min(cols, term.marg_right + 1);
n = (n < 0 ? -n : n);
if (n > cols - curs->x)
n = cols - curs->x;
m = cols - curs->x - n;
term_check_boundary(curs->x, curs->y);
term_check_boundary(curs->x + m, curs->y);
if (del) {
for (int j = 0; j < m; j++)
move_termchar(line, line->chars + curs->x + j,
line->chars + curs->x + j + n);
while (n--)
line->chars[curs->x + m++] = term.erase_char;
}
else {
for (int j = m; j--;)
move_termchar(line, line->chars + curs->x + j + n,
line->chars + curs->x + j);
while (n--)
line->chars[curs->x + n] = term.erase_char;
}
}
static int
charwidth(xchar chr)
{
#if HAS_LOCALES
if (cfg.charwidth % 10)
return xcwidth(chr);
else
if (chr > 0xFFFF)
return wcswidth((wchar[]){high_surrogate(chr), low_surrogate(chr)}, 2);
else
return wcwidth(chr);
#else
return xcwidth(chr);
#endif
}
static void
attr_rect(cattrflags add, cattrflags sub, cattrflags xor, short y0, short x0, short y1, short x1)
{
//printf("attr_rect %d,%d..%d,%d +%llX -%llX ^%llX\n", y0, x0, y1, x1, add, sub, xor);
y0--; x0--; y1--; x1--;
if (term.curs.origin) {
y0 += term.marg_top;
x0 += term.marg_left;
y1 += term.marg_top;
x1 += term.marg_left;
}
if (y0 < 0)
y0 = 0;
if (x0 < 0)
x0 = 0;
if (y1 >= term.rows)
y1 = term.rows - 1;
if (x1 >= term.cols)
x1 = term.cols - 1;
//printf("%d,%d..%d,%d\n", y0, x0, y1, x1);
for (int y = y0; y <= y1; y++) {
termline * l = term.lines[y];
int xl = x0;
int xr = x1;
if (!term.attr_rect) {
if (y != y0)
xl = term.marg_left;
if (y != y1)
xr = term.marg_right;
}
for (int x = xl; x <= xr; x++) {
//printf("attr %d:%d\n", y, x);
cattrflags ca = l->chars[x].attr.attr;
ca ^= xor;
ca &= ~sub;
ca |= add;
if (ca != l->chars[x].attr.attr) {
if (x == xl)
term_check_boundary(x, y);
if (x == xr)
term_check_boundary(x + 1, y);
}
l->chars[x].attr.attr = ca;
}
}
}
//static void write_char(wchar c, int width);
static void term_do_write(const char *buf, uint len);
static void
fill_rect(xchar chr, cattr attr, bool sel, short y0, short x0, short y1, short x1)
{
//printf("fill_rect %d,%d..%d,%d\n", y0, x0, y1, x1);
int width = charwidth(chr);
if (chr == UCSWIDE || width < 1)
return;
wchar low = 0;
if (chr > 0xFFFF) {
low = low_surrogate(chr);
chr = high_surrogate(chr);
}
y0--; x0--; y1--; x1--;
if (term.curs.origin) {
y0 += term.marg_top;
x0 += term.marg_left;
y1 += term.marg_top;
x1 += term.marg_left;
}
if (y0 < 0)
y0 = 0;
if (x0 < 0)
x0 = 0;
if (y1 >= term.rows)
y1 = term.rows - 1;
if (x1 >= term.cols)
x1 = term.cols - 1;
//printf("%d,%d..%d,%d\n", y0, x0, y1, x1);
//printf("gl %d gr %d csets %d %d %d %d /%d sup %d acs %d\n", term.curs.gl, term.curs.gr, term.curs.csets[0], term.curs.csets[1], term.curs.csets[2], term.curs.csets[3], term.curs.cset_single, term.curs.decsupp, term.curs.oem_acs);
if ((chr > ' ' && chr < 0x80
&& (term.curs.csets[term.curs.gl] != CSET_ASCII
||
term.curs.cset_single != CSET_ASCII
)
)
||
(chr >= 0x80 && chr < 0x100
&& ((term.curs.gr && term.curs.csets[term.curs.gr] != CSET_ASCII)
|| term.curs.oem_acs
)
)
|| (chr >= 0x2580 && chr <= 0x259F)
)
{
term_cursor csav = term.curs;
term.curs.attr = attr;
#ifdef debug_FRA_special
// make this code branch visible
term.curs.attr.attr &= ~ATTR_FGMASK;
term.curs.attr.attr |= RED_I << ATTR_FGSHIFT;
#endif
term.curs.width = 1;
if (!(width < 2 || (cs_ambig_wide && is_ambig(chr))))
term.curs.attr.attr |= TATTR_CLEAR | TATTR_NARROW;
term.state = NORMAL;
char * cbuf = 0;
if (chr > 0xFF) {
wchar * wc = (wchar[]){chr, low, 0};
cbuf = cs__wcstombs(wc);
}
for (int y = y0; y <= y1; y++) {
term.curs.y = y;
for (int x = x0; x <= x1; x++) {
term.curs.x = x;
term.curs.cset_single = csav.cset_single;
if (chr > 0xFF) {
//write_char(chr, 1); // would skip NRCS handling in term_do_write
term_do_write(cbuf, strlen(cbuf));
}
else {
char c = chr;
term_do_write(&c, 1);
}
}
}
if (cbuf)
free(cbuf);
term.curs = csav;
term.curs.cset_single = CSET_ASCII;
return;
}
if (width > 1)
attr.attr |= TATTR_CLEAR | TATTR_NARROW;
for (int y = y0; y <= y1; y++) {
termline * l = term.lines[y];
bool prevprot = true; // not false!
for (int x = x0; x <= x1; x++) {
//printf("fill %d:%d\n", y, x);
bool prot = sel && l->chars[x].attr.attr & ATTR_PROTECTED;
if (prot != prevprot) {
// |P not here, no check
// |N check
// NP check only current position
// PN check
if (!prot) { // includes the case x == x0
// clear previous half of wide char, even if protected
term_check_boundary(x0, y);
}
else if (l->chars[x].chr == UCSWIDE) {
// clear right half of wide char, even if protected;
// calling term_check_boundary would overwrite previous fill char
clear_cc(l, x);
l->chars[x].chr = ' ';
}
}
// clear wide char on right area border unless protected
if (!prot && x == x1)
term_check_boundary(x1 + 1, y);
prevprot = prot;
if (!sel || !prot) {
clear_cc(l, x);
l->chars[x].chr = chr;
l->chars[x].attr = attr;
if (low)
add_cc(l, x, low, attr);
}
}
}
}
static void
copy_rect(short y0, short x0, short y1, short x1, short y2, short x2)
{
//printf("copy_rect %d,%d..%d,%d -> %d,%d\n", y0, x0, y1, x1, y2, x2);
y0--; x0--; y1--; x1--; y2--; x2--;
if (term.curs.origin) {
y0 += term.marg_top;
x0 += term.marg_left;
y1 += term.marg_top;
x1 += term.marg_left;
y2 += term.marg_top;
x2 += term.marg_left;
}
if (y0 < 0)
y0 = 0;
if (x0 < 0)
x0 = 0;
if (y1 >= term.rows)
y1 = term.rows - 1;
if (x1 >= term.cols)
x1 = term.cols - 1;
if (y2 < 0)
y2 = 0;
if (x2 < 0)
x2 = 0;
if (y2 + y1 - y0 >= term.rows)
y1 = term.rows + y0 - y2 - 1;
if (x2 + x1 - x0 >= term.cols)
x1 = term.cols + x0 - x2 - 1;
//printf("%d,%d..%d,%d -> %d,%d\n", y0, x0, y1, x1, y2, x2);
bool down = y2 > y0;
bool left = x2 > x0;
for (int y = down ? y1 : y0; down ? y >= y0 : y <= y1; down ? y-- : y++) {
termline * src = term.lines[y];
termline * dst = term.lines[y + y2 - y0];
term_check_boundary(x2, y + y2 - y0);
term_check_boundary(x2 + x1 - x0 + 1, y + y2 - y0);
for (int x = left ? x1 : x0; left ? x >= x0 : x <= x1; left ? x-- : x++) {
copy_termchar(dst, x + x2 - x0, &src->chars[x]);
//printf("copy %d:%d -> %d:%d\n", y, x, y + y2 - y0, x + x2 - x0);
if ((x == x0 && src->chars[x].chr == UCSWIDE)
|| (x == x1 && charwidth(src->chars[x].chr) != 1)
)
{
clear_cc(dst, x);
dst->chars[x].chr = ' ';
}
}
}
}
void
scroll_rect(int topline, int botline, int lines)
{
//printf("scroll_rect %d..%d %s%d\n", topline, botline, lines > 0 ? "+" : "", lines);
int y0, y1, y2, e0, e1;
if (lines < 0) { // downwards
// scroll copy clear
// 4 -2 4 6 4
// 20 18 5
if (topline - lines > term.marg_bot + 1)
lines = topline - term.marg_bot - 1;
y0 = topline;
y1 = botline + lines;
y2 = topline - lines;
e0 = y0;
e1 = y0 - lines - 1;
}
else {
// scroll copy clear
// 4 +2 6 4 19
// 20 20 20
if (topline + lines > term.marg_bot + 1)
lines = term.marg_bot + 1 - topline;
y0 = topline + lines;
y1 = botline;
y2 = topline;
e0 = y1 - lines + 1;
e1 = y1;
}
y0++; y1++; y2++; e0++; e1++;
int xl = term.marg_left + 1;
int xr = term.marg_right + 1;
if (term.curs.origin) {
// compensate for the originmode applied in the functions called below
xl = 1;
xr = term.marg_right - term.marg_left + 1;
y0 -= term.marg_top;
y1 -= term.marg_top;
y2 -= term.marg_top;
e0 -= term.marg_top;
e1 -= term.marg_top;
}
copy_rect(y0, xl, y1, xr, y2, xl);
fill_rect(' ', term.curs.attr, false, e0, xl, e1, xr);
}
static void
insdel_column(int col, bool del, int n)
{
//printf("insdel_column @%d %d marg %d..%d\n", col, n, term.marg_left, term.marg_right);
int x0, x1, x2, e0, e1;
if (del) {
x0 = col + n;
x1 = term.marg_right;
x2 = col;
e0 = term.marg_right - n + 1;
e1 = term.marg_right;
if (x0 > term.marg_right) {
x0 = term.marg_right;
e0 = col;
}
}
else {
if (col + n > term.marg_right + 1)
n = term.marg_right + 1 - col;
x0 = col;
x1 = term.marg_right - n;
x2 = col + n;
e0 = col;
e1 = col + n - 1;
}
x0++; x1++; x2++; e0++; e1++;
int yt = term.marg_top + 1;
int yb = term.marg_bot + 1;
if (term.curs.origin) {
// compensate for the originmode applied in the functions called below
yt = 1;
yb = term.marg_bot - term.marg_top + 1;
x0 -= term.marg_left;
x1 -= term.marg_left;
x2 -= term.marg_left;
e0 -= term.marg_left;
e1 -= term.marg_left;
}
copy_rect(yt, x0, yb, x1, yt, x2);
fill_rect(' ', term.curs.attr, false, yt, e0, yb, e1);
}
static uint
sum_rect(short y0, short x0, short y1, short x1)
{
//printf("sum_rect %d,%d..%d,%d\n", y0, x0, y1, x1);
y0--; x0--; y1--; x1--;
if (term.curs.origin) {
y0 += term.marg_top;
x0 += term.marg_left;
y1 += term.marg_top;
x1 += term.marg_left;
}
if (y0 < 0)
y0 = 0;
if (x0 < 0)
x0 = 0;
if (y1 >= term.rows)
y1 = term.rows - 1;
if (x1 >= term.cols)
x1 = term.cols - 1;
//printf("%d,%d..%d,%d\n", y0, x0, y1, x1);
uint sum = 0;
for (int y = y0; y <= y1; y++) {
termline * line = term.lines[y];
for (int x = x0; x <= x1; x++) {
//printf("add %d:%d\n", y, x);
if (line->chars[x].chr == UCSWIDE) {
}
else {
sum += line->chars[x].chr; // xterm default would mask & 0xFF
cattrflags attr = line->chars[x].attr.attr;
if (attr & ATTR_UNDER)
sum += 0x10;
else if (attr & ATTR_REVERSE)
sum += 0x20;
else if (attr & ATTR_BLINK)
sum += 0x40;
else if (attr & ATTR_BOLD)
sum += 0x80;
int xc = x;
while (line->chars[xc].cc_next) {
xc += line->chars[xc].cc_next;
sum += line->chars[xc].chr & 0xFF;
}
}
}
}
return sum;
}
static void
write_bell(void)
{
if (cfg.bell_flash)
term_schedule_vbell(false, 0);
win_bell(&cfg);
}
static void
write_backspace(void)
{
term_cursor *curs = &term.curs;
if (curs->x == term.marg_left && curs->y == term.marg_top
&& term.rev_wrap && !cfg.old_wrapmodes
)
{
curs->y = term.marg_bot;
curs->x = term.marg_right;
}
else if (curs->x == 0 && (curs->y == term.marg_top || !term.autowrap
|| (!cfg.old_wrapmodes && !term.rev_wrap)))
/* skip */;
else if (curs->x == term.marg_left && curs->y > term.marg_top) {
curs->y--;
curs->x = term.marg_right;
}
else if (curs->wrapnext) {
curs->wrapnext = false;
if (!term.rev_wrap && !cfg.old_wrapmodes)
curs->x--;
}
else if (curs->x > 0 && curs->x != term.marg_left)
curs->x--;
}
static void
write_tab(void)
{
term_cursor *curs = &term.curs;
int last = -1;
do {
if (curs->x == term.marg_right)
break;
last = curs->x;
if (term.lines[curs->y]->chars[last].chr == ' '
&& (term.lines[curs->y]->chars[last].attr.attr & TATTR_CLEAR)
)
term.lines[curs->y]->chars[last].attr.attr |= ATTR_DIM;
curs->x++;
} while (curs->x < term.cols - 1 && !term.tabs[curs->x]);
if (last >= 0
&& term.lines[curs->y]->chars[last].chr == ' '
&& (term.lines[curs->y]->chars[last].attr.attr & TATTR_CLEAR)
)
term.lines[curs->y]->chars[last].attr.attr |= ATTR_BOLD;
if ((term.lines[curs->y]->lattr & LATTR_MODE) != LATTR_NORM) {
if (curs->x >= term.cols / 2)
curs->x = term.cols / 2 - 1;
}
else {
if (curs->x >= term.cols)
curs->x = term.cols - 1;
}
}
static void
write_return(void)
{
term.curs.wrapnext = false;
if (term.curs.x < term.marg_left)
term.curs.x = 0;
else
term.curs.x = term.marg_left;
enable_progress();
}
static void
write_linefeed(void)
{
term_cursor *curs = &term.curs;
if (curs->x < term.marg_left || curs->x > term.marg_right)
return;
clear_wrapcontd(term.lines[curs->y], curs->y);
if (curs->y == term.marg_bot)
term_do_scroll(term.marg_top, term.marg_bot, 1, true);
else if (curs->y < term.rows - 1)
curs->y++;
curs->wrapnext = false;
}
static void
write_primary_da(void)
{
string primary_da = primary_da4;
char * vt = strstr(cfg.term, "vt");
if (vt) {
unsigned int ver;
if (sscanf(vt + 2, "%u", &ver) == 1) {
if (ver >= 500)
primary_da = primary_da5;
else if (ver >= 400)
primary_da = primary_da4;
else if (ver >= 300)
primary_da = primary_da3;
else if (ver >= 200)
primary_da = primary_da2;
else
primary_da = primary_da1;
}
}
child_write(primary_da, strlen(primary_da));
}
static wchar last_high = 0;
static wchar last_char = 0;
static int last_width = 0;
cattr last_attr = {.attr = ATTR_DEFAULT,
.truefg = 0, .truebg = 0, .ulcolr = (colour)-1};
static void
write_char(wchar c, int width)
{
//if (kb_trace) printf("[%ld] write_char 'q'\n", mtime());
if (tek_mode) {
tek_write(c, width);
return;
}
if (!c)
return;
term_cursor * curs = &term.curs;
termline * line = term.lines[curs->y];
// support non-BMP for the REP function;
// this is a hack, it would be cleaner to fold the term_write block
// switch (term.state) when NORMAL:
// and repeat that
if (width == -1) { // low surrogate
last_high = last_char;
}
else {
last_high = 0;
last_width = width;
}
last_char = c;
last_attr = curs->attr;
void wrapparabidi(ushort parabidi, termline * line, int y)
{
line->lattr = (line->lattr & ~LATTR_BIDIMASK) | parabidi | LATTR_WRAPCONTD;
#ifdef determine_parabidi_during_output
if (parabidi & (LATTR_BIDISEL | LATTR_AUTOSEL))
return;
// if direction autodetection pending:
// from current line, extend backward and forward to adjust
// "paragraph" bidi attributes (esp. direction) to wrapped lines
termline * paraline = line;
int paray = y;
while ((paraline->lattr & LATTR_WRAPCONTD) && paray > -sblines()) {
paraline = fetch_line(--paray);
paraline->lattr = (paraline->lattr & ~LATTR_BIDIMASK) | parabidi;
release_line(paraline);
}
paraline = line;
paray = y;
while ((paraline->lattr & LATTR_WRAPPED) && paray < term.rows) {
paraline = fetch_line(++paray);
paraline->lattr = (paraline->lattr & ~LATTR_BIDIMASK) | parabidi;
release_line(paraline);
}
#else
(void)y;
#endif
}
void put_char(wchar c)
{
if (term.ring_enabled && curs->x == term.marg_right + 1 - 8) {
win_margin_bell(&cfg);
term.ring_enabled = false;
}
clear_cc(line, curs->x);
line->chars[curs->x].chr = c;
line->chars[curs->x].attr = curs->attr;
#ifdef insufficient_approach
#warning this does not help when scrolling via rectangular copy
if (term.lrmargmode)
line->lattr &= ~LATTR_MODE;
#endif
if (term.curs.rewrap_on_resize)
line->lattr |= LATTR_REWRAP;
else
line->lattr &= ~LATTR_REWRAP;
if (!(line->lattr & LATTR_WRAPCONTD))
line->lattr = (line->lattr & ~LATTR_BIDIMASK) | curs->bidimode;
//TODO: if changed, propagate mode onto paragraph
if (cfg.ligatures_support)
term_invalidate(0, curs->y, curs->x, curs->y);
}
if (curs->wrapnext && term.autowrap && width > 0) {
line->lattr |= LATTR_WRAPPED;
line->wrappos = curs->x;
ushort parabidi = getparabidi(line);
if (curs->y == term.marg_bot)
term_do_scroll(term.marg_top, term.marg_bot, 1, true);
else if (curs->y < term.rows - 1)
curs->y++;
curs->x = term.marg_left;
curs->wrapnext = false;
line = term.lines[curs->y];
wrapparabidi(parabidi, line, curs->y);
}
bool overstrike = false;
if (curs->attr.attr & ATTR_OVERSTRIKE) {
width = 0;
overstrike = true;
curs->wrapnext = false;
}
bool single_width = false;
// adjust to explicit width attribute; not for combinings and low surrogates
if (curs->width && width > 0) {
//if ((c & 0xFFF) == 0x153) printf("%llX %d\n", curs->attr.attr, width);
if (curs->width == 1) {
if (!(width < 2 || (cs_ambig_wide && is_ambig(c))))
curs->attr.attr |= TATTR_CLEAR | TATTR_NARROW;
width = 1;
}
else if (curs->width == 11) {
if (width > 1) {
if (!(cs_ambig_wide && is_ambig(c))) {
single_width = true;
curs->attr.attr |= TATTR_SINGLE;
}
width = 1;
}
}
else if (curs->width == 2) {
if (width < 2) {
curs->attr.attr |= TATTR_EXPAND;
width = 2;
}
}
#ifdef support_triple_width
else if (curs->width == 3) {
if (width < 2 || (cs_ambig_wide && is_ambig(c)))
curs->attr.attr |= TATTR_EXPAND;
#define TATTR_TRIPLE 0x0080000000000000u
curs->attr.attr |= TATTR_TRIPLE;
width = 3;
}
#endif
}
#ifdef enforce_ambiguous_narrow_here
// enforce ambiguous-narrow as configured or for WSL;
// this could be done here but is now sufficiently achieved in charset.c
if (cs_ambig_narrow && width > 1 && is_ambig(c))
width = 1;
#endif
if (cfg.charwidth >= 10 || cs_single_forced) {
if (width > 1) {
single_width = true;
width = 1;
}
else if (is_wide(c) || (cs_ambig_wide && is_ambig(c))) {
single_width = true;
}
}
if (term.insert && width > 0)
insert_char(width);
switch (width) {
when 1: // Normal character.
term_check_boundary(curs->x, curs->y);
term_check_boundary(curs->x + 1, curs->y);
put_char(c);
if (single_width)
line->chars[curs->x].attr.attr |= TATTR_SINGLE;
when 2 or 3: // Double-width char (Triple-width was an experimental option).
/*
* If we're about to display a double-width character
* starting in the rightmost column,
* then we do something special instead.
* We must print a space in the last column of the screen, then wrap;
* and we also set LATTR_WRAPPED2 which instructs subsequent
* cut-and-pasting not only to splice this line to the one after it,
* but to ignore the space in the last character position as well.
* (Because what was actually output to the terminal was presumably
* just a sequence of CJK characters, and we don't want a space to be
* pasted in the middle of those just because they had the misfortune
* to start in the wrong parity column. xterm concurs.)
*/
term_check_boundary(curs->x, curs->y);
term_check_boundary(curs->x + width, curs->y);
if (curs->x == term.marg_right || curs->x == term.cols - 1) {
line->chars[curs->x] = term.erase_char;
line->lattr |= LATTR_WRAPPED | LATTR_WRAPPED2;
line->wrappos = curs->x;
ushort parabidi = getparabidi(line);
if (curs->y == term.marg_bot)
term_do_scroll(term.marg_top, term.marg_bot, 1, true);
else if (curs->y < term.rows - 1)
curs->y++;
curs->x = term.marg_left;
line = term.lines[curs->y];
wrapparabidi(parabidi, line, curs->y);
/* Now we must term_check_boundary again, of course. */
term_check_boundary(curs->x, curs->y);
term_check_boundary(curs->x + width, curs->y);
}
put_char(c);
curs->x++;
put_char(UCSWIDE);
#ifdef support_triple_width
if (width > 2) {
for (int i = 2; i < width; i++) {
curs->x++;
put_char(UCSWIDE);
}
}
#endif
when 0 or -1: // Combining character or Low surrogate.
#ifdef debug_surrogates
printf("write_char %04X %2d %08llX\n", c, width, curs->attr.attr);
#endif
if (curs->x > 0 || overstrike) {
/* If we're in wrapnext state, the character
* to combine with is _here_, not to our left. */
int x = curs->x - !curs->wrapnext;
/* Same if we overstrike an actually not combining character. */
if (overstrike)
x = curs->x;
/*
* If the previous character is UCSWIDE, back up another one.
*/
if (line->chars[x].chr == UCSWIDE) {
assert(x > 0);
x--;
}
/* Try to precompose with the cell's base codepoint */
wchar pc;
if (termattrs_equal_fg(&line->chars[x].attr, &curs->attr))
pc = win_combine_chars(line->chars[x].chr, c, curs->attr.attr);
else
pc = 0;
if (pc)
line->chars[x].chr = pc;
else
add_cc(line, x, c, curs->attr);
}
else {
// add initial combining characters,
// particularly to include initial bidi directional markers
add_cc(line, -1, c, curs->attr);
}
if (!overstrike)
return;
// otherwise width 0 was faked for this switch,
// and we still need to advance the cursor below
otherwise: // Anything else. Probably shouldn't get here.
return;
}
curs->x++;
if (curs->x == term.marg_right + 1 || curs->x == term.cols) {
curs->x--;
if (term.autowrap || cfg.old_wrapmodes)
curs->wrapnext = true;
}
}
#define dont_debug_scriptfonts
struct rangefont {
ucschar first, last;
uchar font;
char * scriptname;
};
static struct rangefont scriptfonts[] = {
#include "scripts.t"
};
static struct rangefont blockfonts[] = {
#include "blocks.t"
};