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refactor(drawline.c): factor out utf8 multibyte check

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This commit is contained in:
Lewis Russell 2022-08-19 16:54:27 +01:00
parent 2af9be3db5
commit 7d815eb4d9
1 changed files with 18 additions and 54 deletions
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72
src/nvim/drawline.c
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@ -449,6 +449,16 @@ static void apply_cursorline_highlight(win_T *wp, linenr_T lnum, int *line_attr,
}
}
static bool check_mb_utf8(int *c, int *u8cc)
{
if (utf_char2len(*c) > 1) {
*u8cc = 0;
*c = 0xc0;
return true;
}
return false;
}
/// Display line "lnum" of window 'wp' on the screen.
/// wp->w_virtcol needs to be valid.
///
@ -1460,13 +1470,7 @@ int win_line(win_T *wp, linenr_T lnum, int startrow, int endrow, bool nochange,
if (c_extra != NUL || (n_extra == 1 && c_final != NUL)) {
c = (n_extra == 1 && c_final != NUL) ? c_final : c_extra;
mb_c = c; // doesn't handle non-utf-8 multi-byte!
if (utf_char2len(c) > 1) {
mb_utf8 = true;
u8cc[0] = 0;
c = 0xc0;
} else {
mb_utf8 = false;
}
mb_utf8 = check_mb_utf8(&c, u8cc);
} else {
assert(p_extra != NULL);
c = *p_extra;
@ -1855,13 +1859,7 @@ int win_line(win_T *wp, linenr_T lnum, int startrow, int endrow, bool nochange,
extra_attr = win_hl_attr(wp, HLF_0);
saved_attr2 = char_attr; // save current attr
mb_c = c;
if (utf_char2len(c) > 1) {
mb_utf8 = true;
u8cc[0] = 0;
c = 0xc0;
} else {
mb_utf8 = false;
}
mb_utf8 = check_mb_utf8(&c, u8cc);
}
if (c == ' ' && ((trailcol != MAXCOL && ptr > line + trailcol)
@ -1884,13 +1882,7 @@ int win_line(win_T *wp, linenr_T lnum, int startrow, int endrow, bool nochange,
extra_attr = win_hl_attr(wp, HLF_0);
saved_attr2 = char_attr; // save current attr
mb_c = c;
if (utf_char2len(c) > 1) {
mb_utf8 = true;
u8cc[0] = 0;
c = 0xc0;
} else {
mb_utf8 = false;
}
mb_utf8 = check_mb_utf8(&c, u8cc);
}
}
@ -2004,11 +1996,7 @@ int win_line(win_T *wp, linenr_T lnum, int startrow, int endrow, bool nochange,
extra_attr = win_hl_attr(wp, HLF_0);
saved_attr2 = char_attr; // save current attr
mb_c = c;
if (utf_char2len(c) > 1) {
mb_utf8 = true;
u8cc[0] = 0;
c = 0xc0;
}
mb_utf8 = check_mb_utf8(&c, u8cc);
} else {
c_final = NUL;
c_extra = ' ';
@ -2051,13 +2039,7 @@ int win_line(win_T *wp, linenr_T lnum, int startrow, int endrow, bool nochange,
extra_attr = win_hl_attr(wp, HLF_AT);
n_attr = 1;
mb_c = c;
if (utf_char2len(c) > 1) {
mb_utf8 = true;
u8cc[0] = 0;
c = 0xc0;
} else {
mb_utf8 = false; // don't draw as UTF-8
}
mb_utf8 = check_mb_utf8(&c, u8cc);
} else if (c != NUL) {
p_extra = transchar_buf(wp->w_buffer, c);
if (n_extra == 0) {
@ -2148,13 +2130,7 @@ int win_line(win_T *wp, linenr_T lnum, int startrow, int endrow, bool nochange,
n_skip = 1;
}
mb_c = c;
if (utf_char2len(c) > 1) {
mb_utf8 = true;
u8cc[0] = 0;
c = 0xc0;
} else {
mb_utf8 = false; // don't draw as UTF-8
}
mb_utf8 = check_mb_utf8(&c, u8cc);
} else {
prev_syntax_id = 0;
is_concealing = false;
@ -2208,13 +2184,7 @@ int win_line(win_T *wp, linenr_T lnum, int startrow, int endrow, bool nochange,
extra_attr = win_hl_attr(wp, HLF_AT);
}
mb_c = c;
if (utf_char2len(c) > 1) {
mb_utf8 = true;
u8cc[0] = 0;
c = 0xc0;
} else {
mb_utf8 = false; // don't draw as UTF-8
}
mb_utf8 = check_mb_utf8(&c, u8cc);
saved_attr3 = char_attr; // save current attr
char_attr = win_hl_attr(wp, HLF_AT); // overwriting char_attr
n_attr3 = 1;
@ -2424,13 +2394,7 @@ int win_line(win_T *wp, linenr_T lnum, int startrow, int endrow, bool nochange,
c = wp->w_p_lcs_chars.ext;
char_attr = win_hl_attr(wp, HLF_AT);
mb_c = c;
if (utf_char2len(c) > 1) {
mb_utf8 = true;
u8cc[0] = 0;
c = 0xc0;
} else {
mb_utf8 = false;
}
mb_utf8 = check_mb_utf8(&c, u8cc);
}
// advance to the next 'colorcolumn'