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Add a UTF-8 aware string length function and make UTF-8 in

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status-left/status-right work properly. At the moment any top-bit-set
characters are assumed to be UTF-8: a status-utf8 option to configure this will
come shortly.
This commit is contained in:
Nicholas Marriott
2009-06-03 16:05:46 +00:00
parent 41d985ace3
commit 7d45e29683
3 changed files with 127 additions and 15 deletions
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114
screen-write.c
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@@ -52,20 +52,126 @@ screen_write_putc(
screen_write_cell(ctx, gc, NULL);
}
/* Calculate string length. */
size_t printflike1
screen_write_strlen(const char *fmt, ...)
{
va_list ap;
char *msg;
u_char *ptr, utf8buf[4];
size_t left, size = 0;
va_start(ap, fmt);
xvasprintf(&msg, fmt, ap);
va_end(ap);
ptr = msg;
while (*ptr != '\0') {
if (*ptr > 0x7f) { /* Assume this is UTF-8. */
memset(utf8buf, 0xff, sizeof utf8buf);
left = strlen(ptr);
if (*ptr >= 0xc2 && *ptr <= 0xdf && left >= 2) {
memcpy(utf8buf, ptr, 2);
ptr += 2;
} else if (*ptr >= 0xe0 && *ptr <= 0xef && left >= 3) {
memcpy(utf8buf, ptr, 3);
ptr += 3;
} else if (*ptr >= 0xf0 && *ptr <= 0xf4 && left >= 4) {
memcpy(utf8buf, ptr, 4);
ptr += 4;
} else {
*utf8buf = *ptr;
ptr++;
}
size += utf8_width(utf8buf);
} else {
size++;
ptr++;
}
}
return (size);
}
/* Write string. */
void printflike3
screen_write_puts(
struct screen_write_ctx *ctx, struct grid_cell *gc, const char *fmt, ...)
{
va_list ap;
char *msg, *ptr;
va_start(ap, fmt);
xvasprintf(&msg, fmt, ap);
screen_write_vnputs(ctx, -1, gc, fmt, ap);
va_end(ap);
}
for (ptr = msg; *ptr != '\0'; ptr++)
screen_write_putc(ctx, gc, (u_char) *ptr);
/* Write string with length limit (-1 for unlimited). */
void printflike4
screen_write_nputs(struct screen_write_ctx *ctx,
ssize_t maxlen, struct grid_cell *gc, const char *fmt, ...)
{
va_list ap;
va_start(ap, fmt);
screen_write_vnputs(ctx, maxlen, gc, fmt, ap);
va_end(ap);
}
void
screen_write_vnputs(struct screen_write_ctx *ctx,
ssize_t maxlen, struct grid_cell *gc, const char *fmt, va_list ap)
{
char *msg;
u_char *ptr, utf8buf[4];
size_t left, size = 0;
int width;
xvasprintf(&msg, fmt, ap);
ptr = msg;
while (*ptr != '\0') {
if (*ptr > 0x7f) { /* Assume this is UTF-8. */
memset(utf8buf, 0xff, sizeof utf8buf);
left = strlen(ptr);
if (*ptr >= 0xc2 && *ptr <= 0xdf && left >= 2) {
memcpy(utf8buf, ptr, 2);
ptr += 2;
} else if (*ptr >= 0xe0 && *ptr <= 0xef && left >= 3) {
memcpy(utf8buf, ptr, 3);
ptr += 3;
} else if (*ptr >= 0xf0 && *ptr <= 0xf4 && left >= 4) {
memcpy(utf8buf, ptr, 4);
ptr += 4;
} else {
*utf8buf = *ptr;
ptr++;
}
width = utf8_width(utf8buf);
if (maxlen > 0 && size + width > (size_t) maxlen) {
while (size < (size_t) maxlen) {
screen_write_putc(ctx, gc, ' ');
size++;
}
break;
}
size += width;
gc->flags |= GRID_FLAG_UTF8;
screen_write_cell(ctx, gc, utf8buf);
gc->flags &= ~GRID_FLAG_UTF8;
} else {
if (maxlen > 0 && size > (size_t) maxlen)
break;
size++;
screen_write_putc(ctx, gc, *ptr);
ptr++;
}
}
xfree(msg);
}