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fix: keep whole UTF-8 characters in GFX_truncateText() #876

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fix: keep whole UTF-8 characters in GFX_truncateText() #876

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dcdf829
fix: keep whole UTF-8 characters in GFX_truncateText()
nborodikhin Oct 25, 2026
338df6f
chore: rename kept to keep_bytes in GFX_truncateText()
nborodikhin Oct 25, 2026
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19 changes: 16 additions & 3 deletions workspace/all/common/api.c
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Original file line number Diff line number Diff line change
Expand Up @@ -1018,14 +1018,27 @@ FALLBACK_IMPLEMENTATION void PLAT_setEffectColor(int next_color) {}
int GFX_truncateText(TTF_Font *font, const char *in_name, char *out_name, int max_width, int padding)
{
int text_width;
int len = strlen(in_name);
int keep_bytes = len;
strcpy(out_name, in_name);
TTF_SizeUTF8(font, out_name, &text_width, NULL);
text_width += padding;

while (text_width > max_width)
while (text_width > max_width && keep_bytes > 0)
{
int len = strlen(out_name);
strcpy(&out_name[len - 4], "...\0");
// remove whole UTF-8 characters until "..." fits in the bytes of the removed text
do
{
keep_bytes--;
while (keep_bytes > 0 && ((unsigned char)out_name[keep_bytes] & 0xC0) == 0x80)
keep_bytes--;
} while (keep_bytes > 0 && keep_bytes + 3 > len);

if (keep_bytes + 3 <= len)
strcpy(&out_name[keep_bytes], "...");
else
out_name[0] = '\0';

TTF_SizeUTF8(font, out_name, &text_width, NULL);
text_width += padding;
}
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