sl@0: /*
sl@0:  *
sl@0:  * (C) Copyright IBM Corp. 2002-2004 - All Rights Reserved
sl@0:  *
sl@0:  */
sl@0: 
sl@0: #include "LETypes.h"
sl@0: #include "LEGlyphStorage.h"
sl@0: #include "MPreFixups.h"
sl@0: 
sl@0: U_NAMESPACE_BEGIN
sl@0: 
sl@0: struct FixupData
sl@0: {
sl@0:     le_int32 fBaseIndex;
sl@0:     le_int32 fMPreIndex;
sl@0: };
sl@0: 
sl@0: MPreFixups::MPreFixups(le_int32 charCount)
sl@0:     : fFixupData(NULL), fFixupCount(0)
sl@0: {
sl@0:     fFixupData = LE_NEW_ARRAY(FixupData, charCount);
sl@0: }
sl@0: 
sl@0: MPreFixups::~MPreFixups()
sl@0: {
sl@0:     LE_DELETE_ARRAY(fFixupData);
sl@0:     fFixupData = NULL;
sl@0: }
sl@0: 
sl@0: void MPreFixups::add(le_int32 baseIndex, le_int32 mpreIndex)
sl@0: {
sl@0:     // NOTE: don't add the fixup data if the mpre is right
sl@0:     // before the base consonant glyph.
sl@0:     if (baseIndex - mpreIndex > 1) {
sl@0:         fFixupData[fFixupCount].fBaseIndex = baseIndex;
sl@0:         fFixupData[fFixupCount].fMPreIndex = mpreIndex;
sl@0: 
sl@0:         fFixupCount += 1;
sl@0:     }
sl@0: }
sl@0: 
sl@0: void MPreFixups::apply(LEGlyphStorage &glyphStorage, LEErrorCode& success)
sl@0: {
sl@0:     if (LE_FAILURE(success)) {
sl@0:         return;
sl@0:     }
sl@0: 
sl@0:     for (le_int32 fixup = 0; fixup < fFixupCount; fixup += 1) {
sl@0:         le_int32 baseIndex = fFixupData[fixup].fBaseIndex;
sl@0:         le_int32 mpreIndex = fFixupData[fixup].fMPreIndex;
sl@0:         le_int32 mpreLimit = mpreIndex + 1;
sl@0: 
sl@0:         while (glyphStorage[baseIndex] == 0xFFFF || glyphStorage[baseIndex] == 0xFFFE) {
sl@0:             baseIndex -= 1;
sl@0:         }
sl@0: 
sl@0:         while (glyphStorage[mpreLimit] == 0xFFFF || glyphStorage[mpreLimit] == 0xFFFE) {
sl@0:             mpreLimit += 1;
sl@0:         }
sl@0: 
sl@0:         if (mpreLimit == baseIndex) {
sl@0:             continue;
sl@0:         }
sl@0: 
sl@0:         LEErrorCode success = LE_NO_ERROR;
sl@0:         le_int32   mpreCount = mpreLimit - mpreIndex;
sl@0:         le_int32   moveCount = baseIndex - mpreLimit;
sl@0:         le_int32   mpreDest  = baseIndex - mpreCount;
sl@0:         LEGlyphID *mpreSave  = LE_NEW_ARRAY(LEGlyphID, mpreCount);
sl@0:         le_int32  *indexSave = LE_NEW_ARRAY(le_int32, mpreCount);
sl@0:         if (!mpreSave || !indexSave) {
sl@0:             LE_DELETE_ARRAY(mpreSave);
sl@0:             LE_DELETE_ARRAY(indexSave);
sl@0:             success = LE_MEMORY_ALLOCATION_ERROR;
sl@0:             return;
sl@0:         }
sl@0:         le_int32   i;
sl@0: 
sl@0:         for (i = 0; i < mpreCount; i += 1) {
sl@0:             mpreSave[i]  = glyphStorage[mpreIndex + i];
sl@0:             indexSave[i] = glyphStorage.getCharIndex(mpreIndex + i, success); //charIndices[mpreIndex + i];
sl@0:         }
sl@0: 
sl@0:         for (i = 0; i < moveCount; i += 1) {
sl@0:             LEGlyphID glyph = glyphStorage[mpreLimit + i];
sl@0:             le_int32 charIndex = glyphStorage.getCharIndex(mpreLimit + i, success);
sl@0: 
sl@0:             glyphStorage[mpreIndex + i] = glyph;
sl@0:             glyphStorage.setCharIndex(mpreIndex + i, charIndex, success);
sl@0:         }
sl@0: 
sl@0:         for (i = 0; i < mpreCount; i += 1) {
sl@0:             glyphStorage[mpreDest + i] = mpreSave[i];
sl@0:             glyphStorage.setCharIndex(mpreDest, indexSave[i], success);
sl@0:         }
sl@0:         
sl@0:         LE_DELETE_ARRAY(indexSave);
sl@0:         LE_DELETE_ARRAY(mpreSave);
sl@0:     }
sl@0: }
sl@0: 
sl@0: U_NAMESPACE_END