Update harfbuzz-ng to 0.9.24

third_party/harfbuzz-ng/src/hb-ot-shape-complex-arabic.cc

Index: third_party/harfbuzz-ng/src/hb-ot-shape-complex-arabic.cc
diff --git a/third_party/harfbuzz-ng/src/hb-ot-shape-complex-arabic.cc b/third_party/harfbuzz-ng/src/hb-ot-shape-complex-arabic.cc
index 7f8778a8e72681c7f580864f70b2716565d02139..4f6c86e8ee5fa9a77c3874b74c0bb4d734478cd7 100644
--- a/third_party/harfbuzz-ng/src/hb-ot-shape-complex-arabic.cc
+++ b/third_party/harfbuzz-ng/src/hb-ot-shape-complex-arabic.cc
@@ -157,6 +157,11 @@ static const struct arabic_state_table_entry {
 
 
 static void
+nuke_joiners (const hb_ot_shape_plan_t *plan,
+	      hb_font_t *font,
+	      hb_buffer_t *buffer);
+
+static void
 arabic_fallback_shape (const hb_ot_shape_plan_t *plan,
 		       hb_font_t *font,
 		       hb_buffer_t *buffer);
@@ -176,6 +181,8 @@ collect_features_arabic (hb_ot_shape_planner_t *plan)
    * TODO: Add test cases for these two.
    */
 
+  map->add_gsub_pause (nuke_joiners);
+
   map->add_global_bool_feature (HB_TAG('c','c','m','p'));
   map->add_global_bool_feature (HB_TAG('l','o','c','l'));
 
@@ -193,7 +200,6 @@ collect_features_arabic (hb_ot_shape_planner_t *plan)
   map->add_gsub_pause (NULL);
 
   map->add_global_bool_feature (HB_TAG('c','s','w','h'));
-  map->add_global_bool_feature (HB_TAG('d','l','i','g'));
   map->add_global_bool_feature (HB_TAG('m','s','e','t'));
 }
 
@@ -274,7 +280,8 @@ arabic_joining (hb_buffer_t *buffer)
     const arabic_state_table_entry *entry = &arabic_state_table[state][this_type];
 
     if (entry->prev_action != NONE && prev != (unsigned int) -1)
-      buffer->info[prev].arabic_shaping_action() = entry->prev_action;
+      for (; prev < i; prev++)
+	buffer->info[prev].arabic_shaping_action() = entry->prev_action;
 
     buffer->info[i].arabic_shaping_action() = entry->curr_action;
 
@@ -315,6 +322,17 @@ setup_masks_arabic (const hb_ot_shape_plan_t *plan,
 
 
 static void
+nuke_joiners (const hb_ot_shape_plan_t *plan HB_UNUSED,
+	      hb_font_t *font HB_UNUSED,
+	      hb_buffer_t *buffer)
+{
+  unsigned int count = buffer->len;
+  for (unsigned int i = 0; i < count; i++)
+    if (_hb_glyph_info_is_zwj (&buffer->info[i]))
+      _hb_glyph_info_flip_joiners (&buffer->info[i]);
+}
+
+static void
 arabic_fallback_shape (const hb_ot_shape_plan_t *plan,
 		       hb_font_t *font,
 		       hb_buffer_t *buffer)