Support \rSTYLENAME syntax

This allows to reset to a certain style, instead of the default style
for the current line. For some reason, this was completely missing.

1 files changed, 24 insertions, 0 deletions

diff --git a/libass/ass_utils.c b/libass/ass_utils.c
index 4c9d4bc..222e99a 100644
--- a/libass/ass_utils.c
+++ b/libass/ass_utils.c
@@ -160,6 +160,30 @@ unsigned ass_utf8_get_char(char **str)
     return c;
 }
 
+/**
+ * \brief find style by name
+ * \param track track
+ * \param name style name
+ * \return index in track->styles
+ * Returnes 0 if no styles found => expects at least 1 style.
+ * Parsing code always adds "Default" style in the end.
+ */
+int lookup_style(ASS_Track *track, char *name)
+{
+    int i;
+    if (*name == '*')
+        ++name;                 // FIXME: what does '*' really mean ?
+    for (i = track->n_styles - 1; i >= 0; --i) {
+        if (strcmp(track->styles[i].Name, name) == 0)
+            return i;
+    }
+    i = track->default_style;
+    ass_msg(track->library, MSGL_WARN,
+            "[%p]: Warning: no style named '%s' found, using '%s'",
+            track, name, track->styles[i].Name);
+    return i;                   // use the first style
+}
+
 #ifdef CONFIG_ENCA
 void *ass_guess_buffer_cp(ASS_Library *library, unsigned char *buffer,
                           int buflen, char *preferred_language,