(Vvertical_centering_font_regexp): New variable.

(syms_of_fontset): Declare it as a Lisp variable and initialize.
Set Vignore_relative_composition to nil.
(fs_load_font): Initialize `vertical_centering' of struct
font_info.

diff --git a/src/fontset.c b/src/fontset.c
index 7b602092610f1ea7862f74744edd5d9cede84746..508b6d6065582237b18c6ced570e5667315259d1 100644 (file)
--- a/src/fontset.c
+++ b/src/fontset.c
@@ -37,6 +37,7 @@ Lisp_Object Valternate_fontname_alist;
 Lisp_Object Vfontset_alias_alist;
 Lisp_Object Vhighlight_wrong_size_font;
 Lisp_Object Vclip_large_size_font;
+Lisp_Object Vvertical_centering_font_regexp;
 
 /* Used as a temporary in macro FS_LOAD_FONT.  */
 int font_idx_temp;
@@ -194,10 +195,15 @@ fs_load_font (f, font_table, charset, fontname, fontset)
       return 0;
     }
 
-  /* Fill in fields (CHARSET, ENCODING, and FONT_ENCODER) which are
-     not set by (*load_font_func).  */
+  /* Fill in fields (charset, vertical_centering, encoding, and
+     font_encoder) which are not set by (*load_font_func).  */
   fontp->charset = charset;
 
+  fontp->vertical_centering
+    = (STRINGP (Vvertical_centering_font_regexp)
+       && (fast_c_string_match_ignore_case 
+          (Vvertical_centering_font_regexp, fontp->full_name) >= 0));
+
   if (fontp->encoding[1] != FONT_ENCODING_NOT_DECIDED)
     {
       /* The font itself tells which code points to be used.  Use this
@@ -842,11 +848,11 @@ such a character is displayed on screen.");
 
   DEFVAR_LISP ("ignore-relative-composition", &Vignore_relative_composition,
      "Char table of characters which is not composed relatively.\n\
-If an entry for a character is non-nil, a composite character\n\
+If an entry for a character is non-nil, a composition sequence\n\
 which contains that character is displayed so that\n\
 the glyph of that character is put without considering\n\
 an ascent and descent value of a previous character.");
-  Vuse_default_ascent = Qnil;
+  Vignore_relative_composition = Qnil;
 
   DEFVAR_LISP ("alternate-fontname-alist", &Valternate_fontname_alist,
      "Alist of fontname vs list of the alternate fontnames.\n\
@@ -876,6 +882,13 @@ you can set this variable to nil to display the characters without clipping.\n\
 The drawback is that you will get some garbage left on your screen.");
   Vclip_large_size_font = Qt;
 
+  DEFVAR_LISP ("vertical-centering-font-regexp",
+              &Vvertical_centering_font_regexp,
+    "*Regexp matching font names that require vertical centering on display.\n\
+When a character is displayed with such fonts, the character is displayed\n\
+at the vertival center of lines.");
+  Vvertical_centering_font_regexp = Qnil;
+
   defsubr (&Squery_fontset);
   defsubr (&Snew_fontset);
   defsubr (&Sset_fontset_font);