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ex_getln: Do not do arabic shaping unless needed

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Should speed up execution without arabic characters a bit, slowing down with 
arabic characters. More necessary, this allows coloring prompt without caring 
about arabic shaping at the first iteration.
This commit is contained in:
ZyX
2017-03-26 01:38:43 +03:00
parent 90f62cc749
commit 7db2f658e8
1 changed files with 17 additions and 1 deletions
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18
src/nvim/ex_getln.c
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@@ -2182,6 +2182,22 @@ static void draw_cmdline(int start, int len)
}
}
} else if (p_arshape && !p_tbidi && enc_utf8 && len > 0) {
bool do_arabicshape = false;
int mb_l;
for (int i = start; i < start + len; i += mb_l) {
char_u *p = ccline.cmdbuff + i;
int u8cc[MAX_MCO];
int u8c = utfc_ptr2char_len(p, u8cc, start + len - i);
mb_l = utfc_ptr2len_len(p, start + len - i);
if (arabic_char(u8c)) {
do_arabicshape = true;
break;
}
}
if (!do_arabicshape) {
goto draw_cmdline_no_arabicshape;
}
static int buflen = 0;
// Do arabic shaping into a temporary buffer. This is very
@@ -2201,7 +2217,6 @@ static void draw_cmdline(int start, int len)
newlen = 1;
}
int mb_l;
int prev_c = 0;
int prev_c1 = 0;
for (int i = start; i < start + len; i += mb_l) {
@@ -2256,6 +2271,7 @@ static void draw_cmdline(int start, int len)
msg_outtrans_len(arshape_buf, newlen);
} else {
draw_cmdline_no_arabicshape:
msg_outtrans_len(ccline.cmdbuff + start, len);
}
}