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[A] Add function ft_set_u8strwid_func to set custom function to compute width of utf8 strings

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This commit is contained in:
seleznevae
2019-10-03 23:07:24 +03:00
parent 4e70d08b22
commit da5cbc0404
10 changed files with 193 additions and 1 deletions
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25
tests/wb_tests/test_string_buffer.c
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@@ -349,6 +349,20 @@ void test_str_n_substring(void)
#endif
}
#if defined(FT_HAVE_UTF8)
/* Custom function to compute visible width of utf8 strings */
int u8strwid(const void *beg, const void *end, size_t *width)
{
const char *custom_str = "custom_string";
const size_t raw_len = (const char *)end - (const char *)beg;
if (memcmp(beg, custom_str, MIN(strlen(custom_str), raw_len)) == 0) {
*width = 25;
return 0;
}
return 1;
}
#endif
void test_buffer_text_visible_width(void)
{
f_string_buffer_t *buffer = create_string_buffer(200, CHAR_BUF);
@@ -467,6 +481,17 @@ void test_buffer_text_visible_width(void)
assert_true(buffer_text_visible_width(buffer) == 30);
/* Test custom width function for utf8 strings */
ft_set_u8strwid_func(&u8strwid);
buffer->str.u8str = (void *)"custom_string";
assert_true(buffer_text_visible_width(buffer) == 25);
buffer->str.u8str = (void *)"123456789012345678901234\ncustom_string";
assert_true(buffer_text_visible_width(buffer) == 25);
buffer->str.u8str = (void *)"12345678901234567890123456\ncustom_string";
assert_true(buffer_text_visible_width(buffer) == 26);
buffer->str.u8str = (void *)"common_string";
assert_true(buffer_text_visible_width(buffer) == 13);
ft_set_u8strwid_func(NULL);
#endif
buffer->type = CHAR_BUF;