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Merge branch 'obsd-master'

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This commit is contained in:
Thomas Adam
2023-09-17 21:00:34 +01:00
parent 9f9156c030 7e79108f8a
commit b202a2f1b5
7 changed files with 366 additions and 1239 deletions
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183
screen-write.c
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@@ -32,8 +32,8 @@ static void screen_write_collect_flush(struct screen_write_ctx *, int,
const char *);
static int screen_write_overwrite(struct screen_write_ctx *,
struct grid_cell *, u_int);
static const struct grid_cell *screen_write_combine(struct screen_write_ctx *,
const struct utf8_data *, u_int *, u_int *);
static int screen_write_combine(struct screen_write_ctx *,
const struct grid_cell *);
struct screen_write_citem {
u_int x;
@@ -1832,7 +1832,6 @@ screen_write_collect_end(struct screen_write_ctx *ctx)
if (ci->used == 0)
return;
ctx->flags &= ~SCREEN_WRITE_COMBINE;
before = screen_write_collect_trim(ctx, s->cy, s->cx, ci->used,
&wrapped);
@@ -1936,65 +1935,22 @@ screen_write_cell(struct screen_write_ctx *ctx, const struct grid_cell *gc)
{
struct screen *s = ctx->s;
struct grid *gd = s->grid;
struct grid_cell copy;
const struct utf8_data *ud = &gc->data, *previous = NULL, *combine;
const struct utf8_data *ud = &gc->data;
struct grid_line *gl;
struct grid_cell_entry *gce;
struct grid_cell tmp_gc, now_gc;
struct tty_ctx ttyctx;
u_int sx = screen_size_x(s), sy = screen_size_y(s);
u_int width = ud->width, xx, last, cx, cy;
u_int width = ud->width, xx, not_wrap;
int selected, skip = 1;
/* Ignore padding cells. */
if (gc->flags & GRID_FLAG_PADDING)
return;
/* Check if this cell needs to be combined with the previous cell. */
if (ctx->flags & SCREEN_WRITE_COMBINE)
previous = &ctx->previous;
switch (utf8_try_combined(ud, previous, &combine, &width)) {
case UTF8_DISCARD_NOW:
log_debug("%s: UTF8_DISCARD_NOW (width %u)", __func__, width);
ctx->flags &= ~SCREEN_WRITE_COMBINE;
/* Get the previous cell to check for combining. */
if (screen_write_combine(ctx, gc) != 0)
return;
case UTF8_WRITE_NOW:
log_debug("%s: UTF8_WRITE_NOW (width %u)", __func__, width);
ctx->flags &= ~SCREEN_WRITE_COMBINE;
break;
case UTF8_COMBINE_NOW:
log_debug("%s: UTF8_COMBINE_NOW (width %u)", __func__, width);
screen_write_collect_flush(ctx, 0, __func__);
gc = screen_write_combine(ctx, combine, &xx, &cx);
if (gc != NULL) {
cx = s->cx; cy = s->cy;
screen_write_set_cursor(ctx, xx, s->cy);
screen_write_initctx(ctx, &ttyctx, 0);
ttyctx.cell = gc;
tty_write(tty_cmd_cell, &ttyctx);
s->cx = cx; s->cy = cy;
}
ctx->flags &= ~SCREEN_WRITE_COMBINE;
return;
case UTF8_WRITE_MAYBE_COMBINE:
log_debug("%s: UTF8_WRITE_MAYBE_COMBINE (width %u)", __func__,
width);
utf8_copy(&ctx->previous, ud);
ctx->flags |= SCREEN_WRITE_COMBINE;
break;
case UTF8_DISCARD_MAYBE_COMBINE:
log_debug("%s: UTF8_DISCARD_MAYBE_COMBINE (width %u)", __func__,
width);
utf8_copy(&ctx->previous, ud);
ctx->flags |= SCREEN_WRITE_COMBINE;
return;
}
if (width != ud->width) {
memcpy(&copy, gc, sizeof copy);
copy.data.width = width;
gc = ©
}
ud = NULL;
/* Flush any existing scrolling. */
screen_write_collect_flush(ctx, 1, __func__);
@@ -2086,11 +2042,11 @@ screen_write_cell(struct screen_write_ctx *ctx, const struct grid_cell *gc)
* Move the cursor. If not wrapping, stick at the last character and
* replace it.
*/
last = !(s->mode & MODE_WRAP);
if (s->cx <= sx - last - width)
not_wrap = !(s->mode & MODE_WRAP);
if (s->cx <= sx - not_wrap - width)
screen_write_set_cursor(ctx, s->cx + width, -1);
else
screen_write_set_cursor(ctx, sx - last, -1);
screen_write_set_cursor(ctx, sx - not_wrap, -1);
/* Create space for character in insert mode. */
if (s->mode & MODE_INSERT) {
@@ -2110,65 +2066,98 @@ screen_write_cell(struct screen_write_ctx *ctx, const struct grid_cell *gc)
}
}
/* Combine a UTF-8 zero-width character onto the previous. */
static const struct grid_cell *
screen_write_combine(struct screen_write_ctx *ctx, const struct utf8_data *ud,
u_int *xx, u_int *cx)
/* Combine a UTF-8 zero-width character onto the previous if necessary. */
static int
screen_write_combine(struct screen_write_ctx *ctx, const struct grid_cell *gc)
{
struct screen *s = ctx->s;
struct grid *gd = s->grid;
static struct grid_cell gc;
u_int n, width;
const struct utf8_data *ud = &gc->data;
u_int n, cx = s->cx, cy = s->cy;
struct grid_cell last;
struct tty_ctx ttyctx;
int force_wide = 0, zero_width = 0;
/* Can't combine if at 0. */
if (s->cx == 0) {
*xx = 0;
return (NULL);
/*
* Is this character which makes no sense without being combined? If
* this is true then flag it here and discard the character (return 1)
* if we cannot combine it.
*/
if (utf8_is_zwj(ud))
zero_width = 1;
else if (utf8_is_vs(ud))
zero_width = force_wide = 1;
else if (ud->width == 0)
zero_width = 1;
/* Cannot combine empty character or at left. */
if (ud->size < 2 || cx == 0)
return (zero_width);
log_debug("%s: character %.*s at %u,%u (width %u)", __func__,
(int)ud->size, ud->data, cx, cy, ud->width);
/* Find the cell to combine with. */
n = 1;
grid_view_get_cell(gd, cx - n, cy, &last);
if (cx != 1 && (last.flags & GRID_FLAG_PADDING)) {
n = 2;
grid_view_get_cell(gd, cx - n, cy, &last);
}
*xx = s->cx;
if (n != last.data.width || (last.flags & GRID_FLAG_PADDING))
return (zero_width);
/* Empty data is out. */
if (ud->size == 0)
fatalx("UTF-8 data empty");
/* Retrieve the previous cell. */
for (n = 1; n <= s->cx; n++) {
grid_view_get_cell(gd, s->cx - n, s->cy, &gc);
if (~gc.flags & GRID_FLAG_PADDING)
break;
/*
* Check if we need to combine characters. This could be zero width
* (zet above), a modifier character (with an existing Unicode
* character) or a previous ZWJ.
*/
if (!zero_width) {
if (utf8_is_modifier(ud)) {
if (last.data.size < 2)
return (0);
force_wide = 1;
} else if (!utf8_has_zwj(&last.data))
return (0);
}
if (n > s->cx)
return (NULL);
/* Check there is enough space. */
if (gc.data.size + ud->size > sizeof gc.data.data)
return (NULL);
(*xx) -= n;
/* Combining; flush any pending output. */
screen_write_collect_flush(ctx, 0, __func__);
log_debug("%s: %.*s onto %.*s at %u,%u (width %u)", __func__,
(int)ud->size, ud->data, (int)gc.data.size, gc.data.data, *xx,
s->cy, gc.data.width);
log_debug("%s: %.*s -> %.*s at %u,%u (offset %u, width %u)", __func__,
(int)ud->size, ud->data, (int)last.data.size, last.data.data,
cx - n, cy, n, last.data.width);
/* Append the data. */
memcpy(gc.data.data + gc.data.size, ud->data, ud->size);
gc.data.size += ud->size;
width = gc.data.width;
memcpy(last.data.data + last.data.size, ud->data, ud->size);
last.data.size += ud->size;
/* If this is U+FE0F VARIATION SELECTOR-16, force the width to 2. */
if (gc.data.width == 1 &&
ud->size == 3 &&
memcmp(ud->data, "\357\270\217", 3) == 0) {
grid_view_set_padding(gd, (*xx) + 1, s->cy);
gc.data.width = 2;
width += 2;
}
/* Force the width to 2 for modifiers and variation selector. */
if (last.data.width == 1 && force_wide) {
last.data.width = 2;
n = 2;
cx++;
} else
force_wide = 0;
/* Set the new cell. */
grid_view_set_cell(gd, *xx, s->cy, &gc);
grid_view_set_cell(gd, cx - n, cy, &last);
if (force_wide)
grid_view_set_padding(gd, cx, cy);
*cx = (*xx) + width;
log_debug("%s: character at %u; cursor at %u", __func__, *xx, *cx);
return (&gc);
/*
* Redraw the combined cell. If forcing the cell to width 2, reset the
* cached cursor position in the tty, since we don't really know
* whether the terminal thought the character was width 1 or width 2
* and what it is going to do now.
*/
screen_write_set_cursor(ctx, cx - n, cy);
screen_write_initctx(ctx, &ttyctx, 0);
ttyctx.cell = &last;
ttyctx.num = force_wide; /* reset cached cursor position */
tty_write(tty_cmd_cell, &ttyctx);
screen_write_set_cursor(ctx, cx, cy);
return (1);
}
/*