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.

5 files changed, 16 insertions, 26 deletions

diff --git a/docs/pango-sections.txt b/docs/pango-sections.txt
index d1306e0b..22ea5f4f 100644
--- a/docs/pango-sections.txt
+++ b/docs/pango-sections.txt
@@ -468,7 +468,7 @@ pango_script_get_type
 <TITLE>Engines</TITLE>
 <FILE>engines</FILE>
 PangoEngineInfo
-PangoEngineRange
+PangoEngineScriptInfo
 PangoEngine
 PangoEngineClass
 PANGO_RENDER_TYPE_NONE
diff --git a/docs/tmpl/engines.sgml b/docs/tmpl/engines.sgml
index 754540ce..fb7fdfd2 100644
--- a/docs/tmpl/engines.sgml
+++ b/docs/tmpl/engines.sgml
@@ -37,23 +37,20 @@ engine. It contains the following fields:
 @id: a unique string ID for the engine.
 @engine_type: a string identifying the engine type.
 @render_type: a string identifying the render type.
-@ranges: a pointer to an array of #PangoEngineRange
-         structures. Each structure contains information
-         about a range of Unicode code points that
-         this engine handles.
-@n_ranges: the number of elements in <structfield>ranges</structfield>.
+@scripts: 
+@n_scripts: 
 
-<!-- ##### STRUCT PangoEngineRange ##### -->
+<!-- ##### STRUCT PangoEngineScriptInfo ##### -->
 <para>
-The PangoEngineRange structure contains
-information about a range of Unicode code
-points. It contains the following fields:
+The PangoEngineScriptInfo structure contains
+information about how the shaper covers a particular
+script.
 </para>
 
-@start: the first code point in the range.
-@end: the last code point for the range.
+@script: a #PangoScript. The value %PANGO_SCRIPT_COMMON has
+        the special meaning here of "all scripts"
 @langs: a semicolon separated list of languages that this
-        engine handles for this range. This may be empty, 
+        engine handles for this script. This may be empty, 
         in which case the engine is saying that it is a
         fallback choice for all languages for this range,
         but should not be used if another engine 
diff --git a/docs/tmpl/fonts.sgml b/docs/tmpl/fonts.sgml
index e5385006..6d134866 100644
--- a/docs/tmpl/fonts.sgml
+++ b/docs/tmpl/fonts.sgml
@@ -697,6 +697,7 @@ a particular #PangoFontMap implementation.
 @list_families: A function to list available font families. See
                 pango_font_map_list_families().
 @load_fontset: 
+@shape_engine_type: 
 
 <!-- ##### MACRO PANGO_FONT_MAP_CLASS ##### -->
 <para>
@@ -785,6 +786,7 @@ a particular #PangoFontset implementation.
 @get_metrics: a function to get overall metric information for the fonts 
    in the fontset; see pango_fontset_get_metrics().
 @get_language: a function to get the language of the fontset.
+@foreach: 
 
 <!-- ##### FUNCTION pango_fontset_get_font ##### -->
 <para>
diff --git a/docs/tmpl/modules.sgml b/docs/tmpl/modules.sgml
index 32172efd..893fffe5 100644
--- a/docs/tmpl/modules.sgml
+++ b/docs/tmpl/modules.sgml
@@ -40,8 +40,6 @@ for the codepoint to which this entry belongs and also whether the engine
 matches the language tag for this entry's map exactly or just approximately.
 </para>
 
-@info: 
-@is_exact: 
 
 <!-- ##### FUNCTION pango_find_map ##### -->
 <para>
@@ -54,24 +52,16 @@ matches the language tag for this entry's map exactly or just approximately.
 @Returns: 
 
 
-<!-- ##### FUNCTION pango_map_get_entry ##### -->
-<para>
-
-</para>
-
-@map: 
-@wc: 
-@Returns: 
-
-
 <!-- ##### FUNCTION pango_map_get_engine ##### -->
 <para>
 
 </para>
 
 @map: 
-@wc: 
+@script: 
 @Returns: 
+<!-- # Unused Parameters # -->
+@wc: 
 
 
 <!-- ##### FUNCTION pango_module_register ##### -->
diff --git a/docs/tmpl/pango-engine-shape.sgml b/docs/tmpl/pango-engine-shape.sgml
index 2e0f91ce..68c37707 100644
--- a/docs/tmpl/pango-engine-shape.sgml
+++ b/docs/tmpl/pango-engine-shape.sgml
@@ -26,6 +26,7 @@ Rendering-system dependent script engines
 
 @script_shape: 
 @get_coverage: 
+@covers: 
 
 <!-- ##### MACRO PANGO_ENGINE_TYPE_SHAPE ##### -->
 <para>