/*

 *

 * (C) Copyright IBM Corp. 1998 - 2004 - All Rights Reserved

 *

 */

#include "LETypes.h"

#include "LEFontInstance.h"

#include "OpenTypeTables.h"

#include "Features.h"

#include "Lookups.h"

#include "ScriptAndLanguage.h"

#include "GlyphDefinitionTables.h"

#include "GlyphPositioningTables.h"

#include "SinglePositioningSubtables.h"

#include "PairPositioningSubtables.h"

#include "CursiveAttachmentSubtables.h"

#include "MarkToBasePosnSubtables.h"

#include "MarkToLigaturePosnSubtables.h"

#include "MarkToMarkPosnSubtables.h"

//#include "ContextualPositioningSubtables.h"

#include "ContextualSubstSubtables.h"

#include "ExtensionSubtables.h"

#include "LookupProcessor.h"

#include "GlyphPosnLookupProc.h"

#include "LESwaps.h"

U_NAMESPACE_BEGIN

// Aside from the names, the contextual positioning subtables are

// the same as the contextual substitution subtables.

typedef ContextualSubstitutionSubtable ContextualPositioningSubtable;

typedef ChainingContextualSubstitutionSubtable ChainingContextualPositioningSubtable;

GlyphPositioningLookupProcessor::GlyphPositioningLookupProcessor(

        const GlyphPositioningTableHeader *glyphPositioningTableHeader,

        LETag scriptTag, LETag languageTag, const LETag *featureOrder)

    : LookupProcessor(

                      (char *) glyphPositioningTableHeader,

                      SWAPW(glyphPositioningTableHeader->scriptListOffset),

                      SWAPW(glyphPositioningTableHeader->featureListOffset),

                      SWAPW(glyphPositioningTableHeader->lookupListOffset),

                      scriptTag, languageTag, featureOrder)

{

    // anything?

}

GlyphPositioningLookupProcessor::GlyphPositioningLookupProcessor()

{

}

le_uint32 GlyphPositioningLookupProcessor::applySubtable(

    const LookupSubtable *lookupSubtable, le_uint16 lookupType,

    GlyphIterator *glyphIterator, const LEFontInstance *fontInstance,

    LEErrorCode& success) const

{

    if (LE_FAILURE(success)) {

        return 0;

    }

    le_uint32 delta = 0;

    switch(lookupType)

    {

    case 0:

        break;

    case gpstSingle:

    {

        const SinglePositioningSubtable *subtable = (const SinglePositioningSubtable *) lookupSubtable;

        delta = subtable->process(glyphIterator, fontInstance);

        break;

    }

    case gpstPair:

    {

        const PairPositioningSubtable *subtable = (const PairPositioningSubtable *) lookupSubtable;

        delta = subtable->process(glyphIterator, fontInstance);

        break;

    }

    case gpstCursive:

    {

        const CursiveAttachmentSubtable *subtable = (const CursiveAttachmentSubtable *) lookupSubtable;

        delta = subtable->process(glyphIterator, fontInstance);

        break;

    }

    case gpstMarkToBase:

    {

        const MarkToBasePositioningSubtable *subtable = (const MarkToBasePositioningSubtable *) lookupSubtable;

        delta = subtable->process(glyphIterator, fontInstance);

        break;

    }

     case gpstMarkToLigature:

    {

        const MarkToLigaturePositioningSubtable *subtable = (const MarkToLigaturePositioningSubtable *) lookupSubtable;

        delta = subtable->process(glyphIterator, fontInstance);

        break;

    }

    case gpstMarkToMark:

    {

        const MarkToMarkPositioningSubtable *subtable = (const MarkToMarkPositioningSubtable *) lookupSubtable;

        delta = subtable->process(glyphIterator, fontInstance);

        break;

    }

   case gpstContext:

    {

        const ContextualPositioningSubtable *subtable = (const ContextualPositioningSubtable *) lookupSubtable;

        delta = subtable->process(this, glyphIterator, fontInstance, success);

        break;

    }

    case gpstChainedContext:

    {

        const ChainingContextualPositioningSubtable *subtable = (const ChainingContextualPositioningSubtable *) lookupSubtable;

        delta = subtable->process(this, glyphIterator, fontInstance, success);

        break;

    }

    case gpstExtension:

    {

        const ExtensionSubtable *subtable = (const ExtensionSubtable *) lookupSubtable;

        delta = subtable->process(this, lookupType, glyphIterator, fontInstance, success);

        break;

    }

    default:

        break;

    }

    return delta;

}

GlyphPositioningLookupProcessor::~GlyphPositioningLookupProcessor()

{

}

U_NAMESPACE_END