Modules now declare a list of scripts that they cover instead of a list of

Tue Sep 23 18:03:57 2003  Owen Taylor  <otaylor@redhat.com>

	* pango/pango-engines.[ch] pango/pango-engines-private.h:
	Modules now declare a list of scripts that they cover instead of a
	list of code point ranges. Also, there is now a ->covers() virtual
	function that allows a module to decide live whether the font
	covers a particular codepoint; remove old get_coverage() method.

	* pango/pango-fontset.[ch]: Add a foreach() function to
	iterate over all the fonts in a fontset (with a true
	return stopping iteration).

	* pango/pango-context.c: Complete rewrite using script-run
	information to improve language tags. Switch to an approach
	where we handle one run at a time rather than computing
	information for each character individually then later
	breaking the result into runs.

	* pango/pango-fontset.[ch]: Switch over to using
	pango-impl-utils.h.

	* modules/basic/basic-x.c pango/pangox-fontmap.c: Adapt to
	the change from get_coverage => covers.

	* pango/pango-modules.h pango/modules.c: Switch PangoMap
	over to being based on script rather than being based
	on codepoint. Remove the no longer needed pango_map_get_entry().

	* pango/modules.c: Handle new script-based modules.

	* pango/pango-fc-fontmap.c pango/pango-win32-fontmap.c
	pango/pang-fontmap.[ch]: Add a shape_engine_type field
	to PangoFontmapClass, pango_font_map_get_shape_engine_type();
	this allows generic code to find a shaper for a particular
	fontmap.

	* pango/pango-script.[ch]: Add pango_script_get_sample_language(),
	pango_language_includes_script(); functions for determining
	the relationship between scripts and language.

	* tools/gen-script-for-lang.c: Modify to spit out a
	useful table.

	* pango/pango-script-lang-table.h: Version of table
	generated from current fontconfig data.

	* pango/pangox.c: Remove complicated code to compute
	coverages; no longer useful now that we just have
	the basic shaper as a legacy thing.

	* modules/*/*.c: Adapt to identifying shape engines
	by language range.

	* modules/thai/thai-fc.c modules/thai/thai-shaper.[ch]:
	Remove now unused "has_glyph" function and XTIS support.

	* modules/thai/thai-fc.c: Handle non-Thai characters
	as well, since the Thai module now gets spaces,
	punctuation, and so forth.

1 files changed, 29 insertions, 8 deletions

diff --git a/pango/pango-fontset.h b/pango/pango-fontset.h
index 8a118328..49cc6006 100644
--- a/pango/pango-fontset.h
+++ b/pango/pango-fontset.h
@@ -41,9 +41,27 @@ GType pango_fontset_get_type (void) G_GNUC_CONST;
 
 typedef struct _PangoFontset        PangoFontset;
 
-PangoFont *       pango_fontset_get_font    (PangoFontset  *fontset,
-					     guint          wc);
-PangoFontMetrics *pango_fontset_get_metrics (PangoFontset  *fontset);
+/**
+ * PangoFontsetForeachFunc
+ * @fontset: a #PangoFontset
+ * @font: a font from @fontset
+ * @data: callback data
+ * 
+ * A callback function used by pango_fontset_foreach() when enumerating
+ * the fonts in a fontset.
+ *
+ * Returns: if %TRUE, stop iteration and return immediatlehy.
+ **/
+typedef gboolean (*PangoFontsetForeachFunc) (PangoFontset  *fontset,
+					     PangoFont     *font,
+					     gpointer       data);
+
+PangoFont *       pango_fontset_get_font    (PangoFontset           *fontset,
+					     guint                   wc);
+PangoFontMetrics *pango_fontset_get_metrics (PangoFontset           *fontset);
+void              pango_fontset_foreach     (PangoFontset           *fontset,
+					     PangoFontsetForeachFunc func,
+					     gpointer                data);
 
 #ifdef PANGO_ENABLE_BACKEND
 
@@ -64,11 +82,14 @@ struct _PangoFontsetClass
 
   /*< public >*/
    
-  PangoFont *       (*get_font)     (PangoFontset  *fontset,
-				     guint          wc);
-
-  PangoFontMetrics *(*get_metrics)  (PangoFontset  *fontset);
-  PangoLanguage *   (*get_language) (PangoFontset  *fontset);
+  PangoFont *       (*get_font)     (PangoFontset     *fontset,
+				     guint             wc);
+
+  PangoFontMetrics *(*get_metrics)  (PangoFontset     *fontset);
+  PangoLanguage *   (*get_language) (PangoFontset     *fontset);
+  void              (*foreach)      (PangoFontset           *fontset,
+				     PangoFontsetForeachFunc func,
+				     gpointer                data);
 
   /*< private >*/