--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/fontservices/textshaperplugin/IcuSource/layout/HanLayoutEngine.h	Tue Feb 02 02:02:46 2010 +0200
@@ -0,0 +1,104 @@
+
+/*
+ * HanLayoutEngine.h: OpenType processing for Han fonts.
+ *
+ * (C) Copyright IBM Corp. 1998-2005 - All Rights Reserved.
+ */
+
+#ifndef __HANLAYOUTENGINE_H
+#define __HANLAYOUTENGINE_H
+
+#include "LETypes.h"
+#include "LEFontInstance.h"
+#include "LayoutEngine.h"
+#include "OpenTypeLayoutEngine.h"
+
+#include "GlyphSubstitutionTables.h"
+
+U_NAMESPACE_BEGIN
+
+class LEGlyphStorage;
+
+/**
+ * This class implements OpenType layout for Han fonts. It overrides
+ * the characerProcessing method to assign the correct OpenType feature
+ * tags for the CJK language-specific forms.
+ *
+ * @internal
+ */
+class HanOpenTypeLayoutEngine : public OpenTypeLayoutEngine
+{
+public:
+    /**
+     * This is the main constructor. It constructs an instance of HanOpenTypeLayoutEngine for
+     * a particular font, script and language. It takes the GSUB table as a parameter since
+     * LayoutEngine::layoutEngineFactory has to read the GSUB table to know that it has a
+     * Han OpenType font.
+     *
+     * @param fontInstance - the font
+     * @param scriptCode - the script
+     * @param langaugeCode - the language
+     * @param gsubTable - the GSUB table
+     *
+     * @see LayoutEngine::layoutEngineFactory
+     * @see OpenTypeLayoutEngine
+     * @see ScriptAndLangaugeTags.h for script and language codes
+     *
+     * @internal
+     */
+    HanOpenTypeLayoutEngine(const LEFontInstance *fontInstance, le_int32 scriptCode, le_int32 languageCode,
+                            le_int32 typoFlags, const GlyphSubstitutionTableHeader *gsubTable);
+
+
+    /**
+     * The destructor, virtual for correct polymorphic invocation.
+     *
+     * @internal
+     */
+    virtual ~HanOpenTypeLayoutEngine();
+
+    /**
+     * ICU "poor man's RTTI", returns a UClassID for the actual class.
+     *
+     * @stable ICU 2.8
+     */
+    virtual UClassID getDynamicClassID() const;
+
+    /**
+     * ICU "poor man's RTTI", returns a UClassID for this class.
+     *
+     * @stable ICU 2.8
+     */
+    static UClassID getStaticClassID();
+
+protected:
+
+    /**
+     * This method does Han OpenType character processing. It assigns the OpenType feature
+     * tags to the characters to generate the correct language-specific variants.
+     *
+     * Input parameters:
+     * @param chars - the input character context
+     * @param offset - the index of the first character to process
+     * @param count - the number of characters to process
+     * @param max - the number of characters in the input context
+     * @param rightToLeft - <code>TRUE</code> if the characters are in a right to left directional run
+     * @param glyphStorage - the object holding the glyph storage. The char index and auxillary data arrays will be set.
+     *
+     * Output parameters:
+     * @param outChars - the output character arrayt
+     * @param charIndices - the output character index array
+     * @param featureTags - the output feature tag array
+     * @param success - set to an error code if the operation fails
+     *
+     * @return the output character count
+     *
+     * @internal
+     */
+    virtual le_int32 characterProcessing(const LEUnicode chars[], le_int32 offset, le_int32 count, le_int32 max, le_bool rightToLeft,
+            LEUnicode *&outChars, LEGlyphStorage &glyphStorage, LEErrorCode &success);
+
+};
+
+U_NAMESPACE_END
+#endif