[buffer] When deleting glyphs, check cluster backwards as well

2 years ago · 9c0c31dfaa
parent 0384f80e78
commit 9c0c31dfaa
1 changed files with 2 additions and 1 deletions
--- a/src/hb-buffer.cc
+++ b/src/hb-buffer.cc
@ -543,7 +543,8 @@ hb_buffer_t::delete_glyph ()
  /* The logic here is duplicated in hb_ot_hide_default_ignorables(). */

  unsigned int cluster = info[idx].cluster;
-  if (idx + 1 < len && cluster == info[idx + 1].cluster)
+  if ((idx + 1 < len && cluster == info[idx + 1].cluster) ||
+      (out_len && cluster == out_info[out_len - 1].cluster))
  {
    /* Cluster survives; do nothing. */
    goto done;