evas_textblock: myanmar script rendering with e vowel.

Summary: Resolve rendering e vowel (0x1031) with Myanmar(Burmese) with zero width non joiner (0x200C)

Test Plan: ninja test

Reviewers: woohyun, bowonryu

Reviewed By: bowonryu

Subscribers: cedric, #reviewers, #committers

Tags: #efl

Differential Revision: https://phab.enlightenment.org/D12102

1 files changed, 21 insertions, 0 deletions

diff --git a/src/lib/evas/canvas/evas_object_textblock.c b/src/lib/evas/canvas/evas_object_textblock.c
index 7a4a37134c..d50592cc5d 100644
--- a/src/lib/evas/canvas/evas_object_textblock.c
+++ b/src/lib/evas/canvas/evas_object_textblock.c
@@ -5436,6 +5436,27 @@ skip:
 
         script = evas_common_language_script_type_get(str, script_len);
 
+        /* FIXME Workaround for Burmese Vowel E Rendering, caused by bug in Harfbuzz
+           breaking text run will fix the visual issue.
+        */
+        if (script == EVAS_SCRIPT_MYANMAR && script_len > 1)
+          {
+             int i;
+             for (i = 0 ; i < script_len - 1; i++)
+               {
+                  if (str[i] == 0x200C)
+                    {
+                       if (str[i+1] == 0x1031)
+                         {
+                            cur_len += script_len;
+                            script_len = i + 1;
+                            cur_len -= script_len;
+                            break;
+                         }
+                    }
+               }
+          }
+
         Evas_Object_Protected_Data *obj = efl_data_scope_get(c->obj, EFL_CANVAS_OBJECT_CLASS);
         while (script_len > 0)
           {