[pango: 1/2] macOS: Use system `Apple Color Emoji` font for emoji characters.

[Emmanuele Bassi <ebassi src gnome org>]

commit 30ab4379a60828be1ff570a518be63942389b849
Author: Suyuan Chang <suyuan cloudmosa com>
Date:   Fri Jan 25 10:12:24 2019 -0800

    macOS: Use system `Apple Color Emoji` font for emoji characters.

 pango/pangocoretext-fontmap.c | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)
---
diff --git a/pango/pangocoretext-fontmap.c b/pango/pangocoretext-fontmap.c
index 6fc8a279..b4654268 100644
--- a/pango/pangocoretext-fontmap.c
+++ b/pango/pangocoretext-fontmap.c
@@ -1323,7 +1323,8 @@ pango_core_text_font_map_load_fontset (PangoFontMap               *fontmap,
 
       if (G_UNLIKELY (!fontset))
         {
-          /* If no font(set) could be loaded, we fallback to "Sans",
+          /* If no font(set) could be loaded, we fallback to "Apple Color
+           * Emoji" for emoji font, fallback to "Sans" for other fonts,
            * which should always work on Mac. We try to adhere to the
            * requested style at first.
            */
@@ -1333,7 +1334,10 @@ pango_core_text_font_map_load_fontset (PangoFontMap               *fontmap,
           pango_font_description_free (key.desc);
 
           tmp_desc = pango_font_description_copy_static (desc);
-          pango_font_description_set_family_static (tmp_desc, "Sans");
+          if (strcmp (pango_font_description_get_family (tmp_desc), "emoji") == 0)
+            pango_font_description_set_family_static (tmp_desc, "Apple Color Emoji");
+          else
+            pango_font_description_set_family_static (tmp_desc, "Sans");
 
           pango_core_text_fontset_key_init (&key, ctfontmap, context, tmp_desc,
                                             language);