evas_object_textblock: add support for variation sequences

Summary: update font processing to handle variation sequences unicodes to select proper glypg in respect to variation seqences

Test Plan:
```
#define EFL_EO_API_SUPPORT 1
#define EFL_BETA_API_SUPPORT 1
#include <Eina.h>
#include <Efl.h>
#include <Elementary.h>

EAPI_MAIN int
elm_main(int argc, char **argv)
{
   Evas_Object *win, *textblock;

   elm_policy_set(ELM_POLICY_QUIT, ELM_POLICY_QUIT_LAST_WINDOW_CLOSED);

   win = elm_win_util_standard_add("Main", "");
   elm_win_autodel_set(win, EINA_TRUE);
   textblock = evas_object_textblock_add(win);
   efl_canvas_text_style_set(textblock,NULL,"DEFAULT='font=DejaVuSans font_fallbacks=SamsungColorEmoji color=#000 font_size=20'");
   evas_object_textblock_text_markup_set(textblock, "8&#xfe0f;&#x20E3;&#x262a;&#xfe0f;AAA&#x262a;&#xfe0E;1234567&#xfe0f;&#x20E3;");

   evas_object_size_hint_weight_set(textblock, EVAS_HINT_EXPAND, EVAS_HINT_EXPAND);
   evas_object_size_hint_align_set(textblock, EVAS_HINT_FILL, EVAS_HINT_FILL);
   evas_object_show(textblock);
   evas_object_move(textblock, 0, 0);
   evas_object_resize(textblock, 320, 320);
   evas_object_resize(win, 320, 320);
   evas_object_show(win);
   elm_run();
   return 0;

}

ELM_MAIN()

```

Reviewers: woohyun, bowonryu, segfaultxavi, cedric, bu5hm4n

Reviewed By: woohyun, cedric

Subscribers: raster, bu5hm4n, subodh6129, herdsman, segfaultxavi, zmike, cedric, #committers, #reviewers

Tags: #efl

Differential Revision: https://phab.enlightenment.org/D9053

2 files changed, 26 insertions, 0 deletions

diff --git a/src/bin/elementary/test.c b/src/bin/elementary/test.c
index 966d164c24..4150ab20ea 100644
--- a/src/bin/elementary/test.c
+++ b/src/bin/elementary/test.c
@@ -244,6 +244,7 @@ void test_textblock_fit(void *data, Evas_Object *obj, void *event_info);
 void test_label_ellipsis(void *data, Evas_Object *obj, void *event_info);
 void test_label_colors(void *data, Evas_Object *obj, void *event_info);
 void test_label_emoji(void *data, Evas_Object *obj, void *event_info);
+void test_label_variation_sequence(void *data, Evas_Object *obj, void *event_info);
 void test_conformant(void *data, Evas_Object *obj, void *event_info);
 void test_conformant2(void *data, Evas_Object *obj, void *event_info);
 void test_conformant_indicator(void *data, Evas_Object *obj, void *event_info);
@@ -1211,6 +1212,7 @@ add_tests:
    ADD_TEST(NULL, "Text", "Label Ellipsis", test_label_ellipsis);
    ADD_TEST(NULL, "Text", "Label Colors", test_label_colors);
    ADD_TEST(NULL, "Text", "Label Emoji", test_label_emoji);
+   ADD_TEST(NULL, "Text", "Label Variation Sequnece", test_label_variation_sequence);
    ADD_TEST_EO(NULL, "Text", "Efl.Ui.Textpath", test_ui_textpath);
    ADD_TEST_EO(NULL, "Text", "Efl.Canvas.Textblock style", test_canvas_textblock);
 
diff --git a/src/bin/elementary/test_label.c b/src/bin/elementary/test_label.c
index 929d06b1d5..5b3e5e8265 100644
--- a/src/bin/elementary/test_label.c
+++ b/src/bin/elementary/test_label.c
@@ -635,6 +635,30 @@ test_label_colors(void *data EINA_UNUSED, Evas_Object *obj EINA_UNUSED, void *ev
    evas_object_show(win);
 }
 
+/*** Label variation sequence **************************************************************/
+void
+test_label_variation_sequence(void *data EINA_UNUSED, Evas_Object *obj EINA_UNUSED, void *event_info EINA_UNUSED)
+{
+   Evas_Object *win, *lb;
+
+   win = elm_win_util_standard_add("label-variation sequence", "Label variation sequnece");
+   elm_win_autodel_set(win, EINA_TRUE);
+
+   lb = elm_label_add(win);
+   elm_object_text_set(lb,
+                       "You need to have at least on font contains variation sequence<br>"
+                       "Three different 8 glyphs : <br>"
+                       "8<tab>8&#xfe0f;<tab>8&#xfe0f;&#x20E3;<br>"
+                       "line with 3 variation glyphs : <br>"
+                       "8&#xfe0f;&#x20E3;&#x262a;&#xfe0f;AAA&#x262a;&#xfe0E;1234567&#xfe0f;&#x20E3;"
+                       );
+   evas_object_size_hint_weight_set(lb, EVAS_HINT_EXPAND, EVAS_HINT_EXPAND);
+   elm_win_resize_object_add(win, lb);
+   evas_object_show(lb);
+
+   evas_object_show(win);
+}
+
 /*** Label Emoji *************************************************************/
 static char *
 _fontlist_text_get(void *data, Evas_Object *obj EINA_UNUSED, const char *part EINA_UNUSED)