(compose-gstring-for-variation-glyph): New

function.  Register it in composition-function-table.

diff --git a/lisp/ChangeLog b/lisp/ChangeLog
index a172cd5d531210ed3c4e627c8c67bc4137458e8f..c06dff83cab946cad863bfe48b1dcdd871baa969 100644 (file)
--- a/lisp/ChangeLog
+++ b/lisp/ChangeLog
@@ -1,3 +1,10 @@
+2008-12-30  Kenichi Handa  <handa@m17n.org>
+
+       * language/japanese.el (compose-gstring-for-variation-glyph): New
+       function.  Register it in composition-function-table.
+
+       * composite.el (lglyph-set-code): New function.
+
 2008-12-30  Stefan Monnier  <monnier@iro.umontreal.ca>
 
        * tar-mode.el (tar-data-swapped): New var.

diff --git a/lisp/language/japanese.el b/lisp/language/japanese.el
index 73c3508a9d1ad37e3146bbf6baf1ba56ed824933..6789e7cdb60d564963dd8a8774c0a2def64ceb80 100644 (file)
--- a/lisp/language/japanese.el
+++ b/lisp/language/japanese.el
@@ -250,6 +250,29 @@ eucJP-ms is defined in <http://www.opengroup.or.jp/jvc/cde/appendix.html>."
   (define-translation-table 'unicode-to-jisx0213
     (char-table-extra-slot table 0)))
 
+(defun compose-gstring-for-variation-glyph (gstring)
+  "Compose glyph-string GSTRING for graphic display.
+GSTRING must have two glyphs; the first is a glyph for a han character,
+and the second is a glyph for a variation selector."
+  (let* ((font (lgstring-font gstring))
+        (han (lgstring-char gstring 0))
+        (vs (lgstring-char gstring 1))
+        (glyphs (font-variation-glyphs font han))
+        (g0 (lgstring-glyph gstring 0))
+        (g1 (lgstring-glyph gstring 1)))
+    (catch 'tag
+      (dolist (elt glyphs)
+       (if (= (car elt) vs)
+           (progn
+             (lglyph-set-code g0 (cdr elt))
+             (lglyph-set-from-to g0 (lglyph-from g0) (lglyph-to g1))
+             (lgstring-set-glyph gstring 1 nil)
+             (throw 'tag gstring)))))))
+
+(let ((elt '([".." 1 compose-gstring-for-variation-glyph])))
+  (set-char-table-range composition-function-table '(#xFE00 . #xFE0F) elt)
+  (set-char-table-range composition-function-table '(#xE0100 . #xE01EF) elt))
+
 (provide 'japanese)
 
 ;; arch-tag: 450f5537-9d53-4d5e-b731-4cf116d8cbc9