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fix: Highlight only the gutter digit #11

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Merged
AnmiTaliDev merged 1 commit into from
Jul 9, 2026
Merged

fix: Highlight only the gutter digit #11

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18 changes: 13 additions & 5 deletions src/render.c
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Original file line number Diff line number Diff line change
Expand Up @@ -77,18 +77,26 @@ static const char *prompt_label(editor_mode_t mode)
static void render_gutter(abuf_t *ab, const editor_t *ed, size_t file_row, bool is_current)
{
int width = editor_gutter_width(ed);
char num[32];
int n = snprintf(num, sizeof(num), "%*zu ", width - 1, file_row + 1);
if (n < 0) {
n = 0;
char digits[32];
int digit_len = snprintf(digits, sizeof(digits), "%zu", file_row + 1);
if (digit_len < 0) {
digit_len = 0;
}

int pad = width - 1 - digit_len;
for (int i = 0; i < pad; i++) {
abuf_append(ab, " ", 1);
}

if (is_current) {
abuf_append_str(ab, "\x1b[7m");
}
abuf_append(ab, num, (size_t)n);
abuf_append(ab, digits, (size_t)digit_len);
if (is_current) {
abuf_append_str(ab, "\x1b[27m");
}

abuf_append(ab, " ", 1);
}

static void render_empty_gutter(abuf_t *ab, const editor_t *ed)
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