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fcft: adapt to API changes in fcft-3.x

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Fcft no longer uses wchar_t, but plain uint32_t to represent
codepoints.

Since we do a fair amount of string operations in foot, it still makes
sense to use something that actually _is_ a string (or character),
rather than an array of uint32_t.

For this reason, we switch out all wchar_t usage in foot to
char32_t. We also verify, at compile-time, that char32_t used
UTF-32 (which is what fcft expects).

Unfortunately, there are no string functions for char32_t. To avoid
having to re-implement all wcs*() functions, we add a small wrapper
layer of c32*() functions.

These wrapper functions take char32_t arguments, but then simply call
the corresponding wcs*() function.

For this to work, wcs*() must _also_ be UTF-32 compatible. We can
check for the presence of the  __STDC_ISO_10646__ macro. If set,
wchar_t is at least 4 bytes and its internal representation is UTF-32.

FreeBSD does *not* define this macro, because its internal wchar_t
representation depends on the current locale. It _does_ use UTF-32
_if_ the current locale is UTF-8.

Since foot enforces UTF-8, we simply need to check if __FreeBSD__ is
defined.

Other fcft API changes:

* fcft_glyph_rasterize() -> fcft_codepoint_rasterize()
* font.space_advance has been removed
* ‘tags’ have been removed from fcft_grapheme_rasterize()
* ‘fcft_log_init()’ removed
* ‘fcft_init()’ and ‘fcft_fini()’ must be explicitly called
This commit is contained in:
Daniel Eklöf 2021-08-21 14:50:42 +02:00
parent 2be8c39044
commit e0227266ca
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GPG key ID: 5BBD4992C116573F
32 changed files with 962 additions and 385 deletions
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15
input.c
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@ -1123,16 +1123,15 @@ legacy_kbd_protocol(struct seat *seat, struct terminal *term,
}
else if (term->meta.eight_bit && count == 1) {
const wchar_t wc = 0x80 | utf8[0];
const char32_t wc = 0x80 | utf8[0];
char wc_as_utf8[8];
mbstate_t ps = {0};
size_t chars = wcrtomb(wc_as_utf8, wc, &ps);
char utf8_meta[MB_CUR_MAX];
size_t chars = c32rtomb(utf8_meta, wc, &(mbstate_t){0});
if (chars != (size_t)-1)
term_to_slave(term, wc_as_utf8, chars);
term_to_slave(term, utf8_meta, chars);
else
term_to_slave(term, wc_as_utf8, count);
term_to_slave(term, utf8, count);
}
else {
@ -1585,8 +1584,8 @@ key_press_release(struct seat *seat, struct terminal *term, uint32_t serial,
xkb_compose_state_get_utf8(
seat->kbd.xkb_compose_state, (char *)utf8, count + 1);
wchar_t wc;
if (mbtowc(&wc, (const char *)utf8, count) == count)
char32_t wc;
if (mbrtoc32(&wc, (const char *)utf8, count, &(mbstate_t){0}) == count)
utf32 = wc;
} else {
xkb_state_key_get_utf8(