static void fill_plaintext(struct sd *sd, double pts)
{
struct sd_ass_priv *ctx = sd->priv;
ASS_Track *track = ctx->shadow_track;
ass_flush_events(track);
char *text = get_text(sd, pts);
if (!text)
return;
bstr dst = {0};
while (*text) {
if (*text == '{')
bstr_xappend(NULL, &dst, bstr0("\\"));
bstr_xappend(NULL, &dst, (bstr){text, 1});
// Break ASS escapes with U+2060 WORD JOINER
if (*text == '\\')
mp_append_utf8_bstr(NULL, &dst, 0x2060);
text++;
}
if (!dst.start || !dst.start[0])
return;
int n = ass_alloc_event(track);
ASS_Event *event = track->events + n;
event->Start = 0;
event->Duration = INT_MAX;
event->Style = track->default_style;
event->Text = strdup(dst.start);
if (track->default_style < track->n_styles)
track->styles[track->default_style].Alignment = ctx->on_top ? 6 : 2;
}
static void add_indent(bstr *b, int indent)
{
if (indent < 0)
return;
bstr_xappend(NULL, b, bstr0("\n"));
for (int n = 0; n < indent; n++)
bstr_xappend(NULL, b, bstr0(" "));
}
static void write_arg(bstr *cmdline, char *arg)
{
// Empty args must be represented as an empty quoted string
if (!arg[0]) {
bstr_xappend(NULL, cmdline, bstr0("\"\""));
return;
}
// If the string doesn't have characters that need to be escaped, it's best
// to leave it alone for the sake of Windows programs that don't process
// quoted args correctly.
if (!strpbrk(arg, " \t\"")) {
bstr_xappend(NULL, cmdline, bstr0(arg));
return;
}
// If there are characters that need to be escaped, write a quoted string
bstr_xappend(NULL, cmdline, bstr0("\""));
// Escape the argument. To match the behavior of CommandLineToArgvW,
// backslashes are only escaped if they appear before a quote or the end of
// the string.
int num_slashes = 0;
for (int pos = 0; arg[pos]; pos++) {
switch (arg[pos]) {
case '\\':
// Count consecutive backslashes
num_slashes++;
break;
case '"':
// Write the argument up to the point before the quote
bstr_xappend(NULL, cmdline, (struct bstr){arg, pos});
arg += pos;
pos = 0;
// Double backslashes preceding the quote
for (int i = 0; i < num_slashes; i++)
bstr_xappend(NULL, cmdline, bstr0("\\"));
num_slashes = 0;
// Escape the quote itself
bstr_xappend(NULL, cmdline, bstr0("\\"));
break;
default:
num_slashes = 0;
}
}
static void write_json_str(bstr *b, unsigned char *str)
{
APPEND(b, "\"");
while (1) {
unsigned char *cur = str;
while (cur[0] >= 32 && cur[0] != '"' && cur[0] != '\\')
cur++;
if (!cur[0])
break;
bstr_xappend(NULL, b, (bstr){str, cur - str});
if (cur[0] == '\"') {
bstr_xappend(NULL, b, (bstr){"\\\"", 2});
} else if (cur[0] == '\\') {
bstr_xappend(NULL, b, (bstr){"\\\\", 2});
} else if (cur[0] < sizeof(special_escape) && special_escape[cur[0]]) {
bstr_xappend_asprintf(NULL, b, "\\%c", special_escape[cur[0]]);
} else {
bstr_xappend_asprintf(NULL, b, "\\u%04x", (unsigned char)cur[0]);
}
str = cur + 1;
}
APPEND(b, str);
APPEND(b, "\"");
}
static void write_json_str(bstr *b, char *str)
{
APPEND(b, "\"");
while (1) {
char *cur = str;
while (cur[0] && cur[0] >= 32 && cur[0] != '"' && cur[0] != '\\')
cur++;
if (!cur[0])
break;
bstr_xappend(NULL, b, (bstr){str, cur - str});
bstr_xappend_asprintf(NULL, b, "\\u%04x", (unsigned char)cur[0]);
str = cur + 1;
}
APPEND(b, str);
APPEND(b, "\"");
}
