Support character composition for Hangul jamo

* lisp/language/korean.el: Add composition rules for conjoining
Hangul jamo.  (Bug#40502)

1 files changed, 12 insertions, 0 deletions

diff --git a/lisp/language/korean.el b/lisp/language/korean.el
index 210d0fabaf7..7e758159a48 100644
--- a/lisp/language/korean.el
+++ b/lisp/language/korean.el
@@ -84,6 +84,18 @@ and the following key bindings are available within Korean input methods:
   F9, Hangul_Hanja:     hangul-to-hanja-conversion")
             ))
 
+;; For auto-composing conjoining jamo.
+(let* ((choseong "[\u1100-\u115F\uA960-\uA97C]")
+       (jungseong "[\u1160-\u11A7\uD7B0-\uD7C6]")
+       (jongseong "[\u11A8-\u11FF\uD7CB-\uD7FB]?")
+       (pattern (concat choseong jungseong jongseong)))
+  (set-char-table-range composition-function-table
+                        '(#x1100 . #x115F)
+                        (list (vector pattern 0 'font-shape-gstring)))
+  (set-char-table-range composition-function-table
+                        '(#xA960 . #xA97C)
+                        (list (vector pattern 0 'font-shape-gstring))))
+
 (provide 'korean)
 
 ;;; korean.el ends here