(get_font_from_group): New function.

[m17n/m17n-lib.git] / src / fontset.c

diff --git a/src/fontset.c b/src/fontset.c
index fb684e9..f054199 100644 (file)
--- a/src/fontset.c
+++ b/src/fontset.c
@@ -845,6 +845,105 @@ mfont__lookup_fontset (MRealizedFontset *realized, MGlyph *g, int *num,
   return NULL;
 }
 
+MRealizedFont *
+get_font_from_group (MFrame *frame, MPlist *plist, MFont *font)
+{
+  MRealizedFont *rfont;
+
+  MPLIST_DO (plist, plist)
+    {
+      MFont spec = *(MFont *) MPLIST_VAL (plist);
+      if (mfont__merge (&spec, font, 1) < 0)
+       continue;
+      if (font->type == MFONT_TYPE_SPEC)
+       rfont = (MRealizedFont *) mfont_find (frame, &spec, NULL, 0);
+      else if (font->type == MFONT_TYPE_OBJECT)
+       rfont = mfont__open (frame, font, &spec);
+      else
+       rfont = (MRealizedFont *) font;
+      if (rfont
+         && (spec.capability == Mnil
+             || mfont__check_capability (rfont, spec.capability) == 0))
+       {
+         rfont->layouter
+           = MPLIST_KEY (plist) == Mt ? Mnil : MPLIST_KEY (plist);
+         return rfont;
+       }
+    }
+  return NULL;
+}
+
+MRealizedFont *
+mfontset__get_font (MFrame *frame, MFontset *fontset,
+                   MSymbol script, MSymbol language, MFont *font,
+                   int *best)
+{
+  MPlist *per_script, *per_lang;
+  MRealizedFont *rfont;
+
+  if (best)
+    *best = 0;
+
+  if (script != Mnil)
+    {
+      per_script = get_per_script (fontset, script);
+      if (language == Mnil)
+       language = Mt;
+      if ((per_lang = mplist_get (per_script, language))
+         && (rfont = get_font_from_group (frame, per_lang, font)))
+       {
+         if (best)
+           *best = 1;
+         return rfont;
+       }
+      if (best)
+       *best = per_lang ? 0 : 1;
+      if (language == Mt)
+       {
+         MPLIST_DO (per_script, per_script)
+           if (MPLIST_KEY (per_script) != language
+               && (rfont = get_font_from_group (frame,
+                                                MPLIST_PLIST (per_script),
+                                                font)))
+             return rfont;
+       }
+      else
+       {
+         if ((per_lang = mplist_get (per_script, Mt))
+             && (rfont = get_font_from_group (frame, per_lang, font)))
+           return rfont;
+         if (best)
+           *best = 0;
+         MPLIST_DO (per_script, per_script)
+           if (MPLIST_KEY (per_script) != language
+               && MPLIST_KEY (per_script) != Mt
+               && (rfont = get_font_from_group (frame,
+                                                MPLIST_PLIST (per_script),
+                                                font)))
+             return rfont;
+       }
+    }
+
+  if (language != Mnil)
+    MPLIST_DO (per_script, fontset->per_script)
+      {
+       if ((per_lang = mplist_get (MPLIST_PLIST (per_script), language))
+           && (rfont = get_font_from_group (frame, per_lang, font)))
+         {
+           if (best)
+             *best = 1;
+           return rfont;
+         }
+      }
+
+  if (best)
+    *best = 0;
+  if ((rfont = get_font_from_group (frame, fontset->fallback, font)))
+    return rfont;
+  return NULL;
+}
+
+
 /*** @} */
 #endif /* !FOR_DOXYGEN || DOXYGEN_INTERNAL_MODULE */