From: handa <handa>
Date: Tue, 22 Jun 2004 05:55:26 +0000 (+0000)
Subject: (realize_fontset_elements)
X-Git-Tag: withdl~49
X-Git-Url: http://git.chise.org/gitweb/?a=commitdiff_plain;h=dd4b7c605fb0d7b3634e132b978e9abd275d82aa;p=m17n%2Fm17n-lib.git

(realize_fontset_elements)
(free_realized_fontset_elements, update_fontset_elements): New
functions.
(mfont__realize_fontset): Call realize_fontset_elements.
(mfont__free_realized_fontset): Call free_realized_fontset_elements.
(mfont__lookup_fontset): If a fontset was modified, update
the realized fontset.
(mfontset_modify_entry): Increment fontset->tick.
(mfontset_lookup): New function.
---

diff --git a/src/fontset.c b/src/fontset.c
index 2e045cc..8e72f9f 100644
--- a/src/fontset.c
+++ b/src/fontset.c
@@ -333,72 +333,16 @@ realize_font_group (MFrame *frame, MFont *request, MPlist *font_group,
     }
 }
 
-
-
-/* Internal API */
-
-int
-mfont__fontset_init ()
-{
-  Mfontset = msymbol ("fontset");
-  Mfontset->managing_key = 1;
-  fontset_list = mplist ();
-  default_fontset = mfontset ("default");
-  if (! default_fontset->mdb)
-    {
-      MFont font;
-
-      MFONT_INIT (&font);
-      mfont_put_prop (&font, Mregistry, msymbol ("iso8859-1"));
-      mfontset_modify_entry (default_fontset, Mnil, Mnil, Mnil,
-			     &font, Mnil, 1);
-      mfont_put_prop (&font, Mregistry, msymbol ("iso10646-1"));
-      mfontset_modify_entry (default_fontset, Mnil, Mnil, Mnil,
-			     &font, Mnil, 1);
-    }
-  return 0;
-}
-
-
-void
-mfont__fontset_fini ()
-{
-  while (! MPLIST_TAIL_P (fontset_list))
-    free_fontset ((MFontset *) MPLIST_VAL (fontset_list));
-  M17N_OBJECT_UNREF (fontset_list);
-  fontset_list = NULL;
-}
-
-
-MRealizedFontset *
-mfont__realize_fontset (MFrame *frame, MFontset *fontset, MFace *face)
+static void
+realize_fontset_elements (MFrame *frame, MRealizedFontset *realized,
+			  MFontset *fontset, MFont *request)
 {
-  MRealizedFontset *realized;
-  MFont request;
   MPlist *per_script, *per_lang, *per_charset, *font_group;
-  MPlist *plist, *pl, *p;
-
-  if (fontset->mdb)
-    load_fontset_contents (fontset);
-
-  mfont__set_spec_from_face (&request, face);
-  if (request.property[MFONT_SIZE] <= 0)
-    {
-      mdebug_hook ();
-      request.property[MFONT_SIZE] = 120;
-    }
-  MPLIST_DO (p, frame->realized_fontset_list)
-    {
-      realized = (MRealizedFontset *) MPLIST_VAL (p);
-      if (fontset->name == MPLIST_KEY (p)
-	  && ! memcmp (&request, &realized->spec, sizeof (request)))
-	return realized;
-    }
+  MPlist *plist, *pl;
 
-  MSTRUCT_MALLOC (realized, MERROR_FONTSET);
   realized->fontset = fontset;
   realized->tick = fontset->tick;
-  realized->spec = request;
+  realized->spec = *request;
   realized->frame = frame;
   realized->per_script = per_script = mplist ();
   MPLIST_DO (plist, fontset->per_script)
@@ -424,13 +368,10 @@ mfont__realize_fontset (MFrame *frame, MFontset *fontset, MFace *face)
   realized->fallback = mplist ();
   mplist_add (realized->fallback, Mplist, fontset->fallback);
 
-  mplist_add (frame->realized_fontset_list, fontset->name, realized);
-  return realized;
 }
 
-
-void
-mfont__free_realized_fontset (MRealizedFontset *realized)
+static void
+free_realized_fontset_elements (MRealizedFontset *realized)
 {
   MPlist *plist, *pl, *p;
   MRealizedFont *rfont;
@@ -471,7 +412,89 @@ mfont__free_realized_fontset (MRealizedFontset *realized)
 	  free (rfont);
       M17N_OBJECT_UNREF (realized->fallback);
     }
+}
+
+static void
+update_fontset_elements (MRealizedFontset *realized)
+{
+  free_realized_fontset_elements (realized);
+  realize_fontset_elements (realized->frame, realized, realized->fontset,
+			    &realized->spec);
+}
+
+
+
+
+/* Internal API */
+
+int
+mfont__fontset_init ()
+{
+  Mfontset = msymbol ("fontset");
+  Mfontset->managing_key = 1;
+  fontset_list = mplist ();
+  default_fontset = mfontset ("default");
+  if (! default_fontset->mdb)
+    {
+      MFont font;
+
+      MFONT_INIT (&font);
+      mfont_put_prop (&font, Mregistry, msymbol ("iso8859-1"));
+      mfontset_modify_entry (default_fontset, Mnil, Mnil, Mnil,
+			     &font, Mnil, 1);
+      mfont_put_prop (&font, Mregistry, msymbol ("iso10646-1"));
+      mfontset_modify_entry (default_fontset, Mnil, Mnil, Mnil,
+			     &font, Mnil, 1);
+    }
+  return 0;
+}
+
+
+void
+mfont__fontset_fini ()
+{
+  while (! MPLIST_TAIL_P (fontset_list))
+    free_fontset ((MFontset *) MPLIST_VAL (fontset_list));
+  M17N_OBJECT_UNREF (fontset_list);
+  fontset_list = NULL;
+}
+
+
+MRealizedFontset *
+mfont__realize_fontset (MFrame *frame, MFontset *fontset, MFace *face)
+{
+  MRealizedFontset *realized;
+  MFont request;
+  MPlist *plist;
+
+  if (fontset->mdb)
+    load_fontset_contents (fontset);
+
+  mfont__set_spec_from_face (&request, face);
+  if (request.property[MFONT_SIZE] <= 0)
+    {
+      mdebug_hook ();
+      request.property[MFONT_SIZE] = 120;
+    }
+  MPLIST_DO (plist, frame->realized_fontset_list)
+    {
+      realized = (MRealizedFontset *) MPLIST_VAL (plist);
+      if (fontset->name == MPLIST_KEY (plist)
+	  && ! memcmp (&request, &realized->spec, sizeof (request)))
+	return realized;
+    }
+
+  MSTRUCT_MALLOC (realized, MERROR_FONTSET);
+  realize_fontset_elements (frame, realized, fontset, &request);
+  mplist_add (frame->realized_fontset_list, fontset->name, realized);
+  return realized;
+}
+
 
+void
+mfont__free_realized_fontset (MRealizedFontset *realized)
+{
+  free_realized_fontset_elements (realized);
   free (realized);
 }
 
@@ -489,6 +512,9 @@ mfont__lookup_fontset (MRealizedFontset *realized, MGlyph *g, int *num,
   MRealizedFont *rfont;
   int i;
 
+  if (realized->tick != realized->fontset->tick)
+    update_fontset_elements (realized);
+
   if (preferred_charset
       && (per_charset = mplist_get (realized->per_charset, charset)) != NULL)
     font_groups[n_font_group++] = per_charset;
@@ -912,9 +938,110 @@ mfontset_modify_entry (MFontset *fontset,
 	}
     }
 
+  fontset->tick++;
   return 0;
 }
 
+/*=*/
+
+/***en
+    @brief Lookup a fontset.
+
+    The mfontset_lookup () function lookups $FONTSET and returns a
+    plist that describes the contents of $FONTSET corresponding to the
+    specified script, language, and charset.
+
+    If $SCRIPT is @c Mt, keys of the returned plist are script name
+    symbols for which some fonts are specified and values are NULL.
+
+    If $SCIRPT is a script symbol, the returned plist is decided by
+    $LANGUAGE.
+
+    If $LANGUAGE is @c Mt, keys of the plist are language name symbols
+    for which some fonts are specified and values are NULL.  A key may
+    be @c Mt which means some fallback fonts are specified for the
+    script.
+
+    If $LANGUAGE is a language name symbol, the plist is a @c
+    FONT-GROUP for the specified script and langauge.
+
+    If $LANGAUGE is @c Mt, the plist is fallback @c FONT-GROUP for the
+    script.
+
+    If $SCRIPT is @c Mnil, the returned plist is decided as below.
+
+    If $CHARSET is @c Mt, keys of the returned plist are charset name
+    symbols for which some fonts are specified and values are NULL.
+
+    If $CHARSET is a charset symbol, the plist is a @c FONT-GROUP for
+    the charset.
+
+    If $CHARSET is @c Mnil, the plist is a fallback @c FONT-GROUP.
+
+    @c FONT-GROUP is a plist whose keys are FLT name symbols (@c Mt if
+    no FLT is associated with the font) and values are pointers to
+    #MFont.
+
+    @return
+    It returns a plist describing the contents of a fontset.  The
+    plist should be freed by m17n_object_unref ().  */
+
+MPlist *
+mfontset_lookup (MFontset *fontset,
+		 MSymbol script, MSymbol language, MSymbol charset)
+{
+  MPlist *plist = mplist (), *pl, *p;
+
+  if (fontset->mdb)
+    load_fontset_contents (fontset);
+  if (script == Mt)
+    {
+      if (! fontset->per_script)
+	return plist;
+      p = plist;
+      MPLIST_DO (pl, fontset->per_script)
+	p = mplist_add (p, MPLIST_KEY (pl), NULL);
+      return plist;
+    }
+  if (script != Mnil)
+    {
+      if (! fontset->per_script)
+	return plist;
+      pl = mplist_get (fontset->per_script, script);
+      if (! pl)
+	return plist;
+      if (language == Mt)
+	{
+	  p = plist;
+	  MPLIST_DO (pl, pl)
+	    p = mplist_add (p, MPLIST_KEY (pl), NULL);
+	  return plist;
+	}
+      if (language == Mnil)
+	language = Mt;
+      pl = mplist_get (pl, language);
+    }
+  else if (charset != Mnil)
+    {
+      if (! fontset->per_charset)
+	return plist;
+      if (charset == Mt)
+	{
+	  p = plist;
+	  MPLIST_DO (pl, fontset->per_charset)
+	    p = mplist_add (p, MPLIST_KEY (pl), NULL);
+	  return plist;
+	}
+      pl = mplist_get (fontset->per_charset, charset);
+    }
+  else
+    pl = fontset->fallback;
+  if (! pl)
+    return plist;
+  return mplist_copy (pl);
+}
+
+
 /*** @} */
 
 /*** @addtogroup m17nDebug */