| /* |
| * |
| * (C) Copyright IBM Corp. and others 1998-2013 - All Rights Reserved |
| * |
| */ |
| |
| #include "LETypes.h" |
| #include "MorphTables.h" |
| #include "StateTables.h" |
| #include "MorphStateTables.h" |
| #include "SubtableProcessor2.h" |
| #include "StateTableProcessor2.h" |
| #include "ContextualGlyphInsertionProc2.h" |
| #include "LEGlyphStorage.h" |
| #include "LESwaps.h" |
| |
| U_NAMESPACE_BEGIN |
| |
| UOBJECT_DEFINE_RTTI_IMPLEMENTATION(ContextualGlyphInsertionProcessor2) |
| |
| ContextualGlyphInsertionProcessor2::ContextualGlyphInsertionProcessor2( |
| const LEReferenceTo<MorphSubtableHeader2> &morphSubtableHeader, LEErrorCode &success) |
| : StateTableProcessor2(morphSubtableHeader, success) |
| { |
| contextualGlyphHeader = LEReferenceTo<ContextualGlyphInsertionHeader2>(morphSubtableHeader, success); |
| if(LE_FAILURE(success) || !contextualGlyphHeader.isValid()) return; |
| le_uint32 insertionTableOffset = SWAPL(contextualGlyphHeader->insertionTableOffset); |
| insertionTable = LEReferenceToArrayOf<le_uint16>(stHeader, success, insertionTableOffset, LE_UNBOUNDED_ARRAY); |
| entryTable = LEReferenceToArrayOf<ContextualGlyphInsertionStateEntry2>(stHeader, success, entryTableOffset, LE_UNBOUNDED_ARRAY); |
| } |
| |
| ContextualGlyphInsertionProcessor2::~ContextualGlyphInsertionProcessor2() |
| { |
| } |
| |
| void ContextualGlyphInsertionProcessor2::beginStateTable() |
| { |
| markGlyph = 0; |
| } |
| |
| void ContextualGlyphInsertionProcessor2::doInsertion(LEGlyphStorage &glyphStorage, |
| le_int16 atGlyph, |
| le_int16 &index, |
| le_int16 count, |
| le_bool /* isKashidaLike */, |
| le_bool isBefore, |
| LEErrorCode &success) { |
| LEGlyphID *insertGlyphs = glyphStorage.insertGlyphs(atGlyph, count + 1, success); |
| |
| if(LE_FAILURE(success) || insertGlyphs==NULL) { |
| return; |
| } |
| |
| // Note: Kashida vs Split Vowel seems to only affect selection and highlighting. |
| // We note the flag, but do not layout different. |
| // https://developer.apple.com/fonts/TTRefMan/RM06/Chap6mort.html |
| |
| le_int16 targetIndex = 0; |
| if(isBefore) { |
| // insert at beginning |
| insertGlyphs[targetIndex++] = glyphStorage[atGlyph]; |
| } else { |
| // insert at end |
| insertGlyphs[count] = glyphStorage[atGlyph]; |
| } |
| |
| while(count--) { |
| insertGlyphs[targetIndex++] = insertionTable.getObject(index++, success); |
| } |
| glyphStorage.applyInsertions(); |
| } |
| |
| le_uint16 ContextualGlyphInsertionProcessor2::processStateEntry(LEGlyphStorage &glyphStorage, le_int32 &currGlyph, |
| EntryTableIndex2 index, LEErrorCode &success) |
| { |
| const ContextualGlyphInsertionStateEntry2 *entry = entryTable.getAlias(index, success); |
| |
| if(LE_FAILURE(success)) return 0; // TODO- which state? |
| |
| le_uint16 newState = SWAPW(entry->newStateIndex); |
| le_uint16 flags = SWAPW(entry->flags); |
| |
| le_int16 markIndex = SWAPW(entry->markedInsertionListIndex); |
| if (markIndex > 0) { |
| le_int16 count = (flags & cgiMarkedInsertCountMask) >> 5; |
| le_bool isKashidaLike = (flags & cgiMarkedIsKashidaLike); |
| le_bool isBefore = (flags & cgiMarkInsertBefore); |
| doInsertion(glyphStorage, markGlyph, markIndex, count, isKashidaLike, isBefore, success); |
| } |
| |
| le_int16 currIndex = SWAPW(entry->currentInsertionListIndex); |
| if (currIndex > 0) { |
| le_int16 count = flags & cgiCurrentInsertCountMask; |
| le_bool isKashidaLike = (flags & cgiCurrentIsKashidaLike); |
| le_bool isBefore = (flags & cgiCurrentInsertBefore); |
| doInsertion(glyphStorage, currGlyph, currIndex, count, isKashidaLike, isBefore, success); |
| } |
| |
| if (flags & cgiSetMark) { |
| markGlyph = currGlyph; |
| } |
| |
| if (!(flags & cgiDontAdvance)) { |
| currGlyph += dir; |
| } |
| |
| return newState; |
| } |
| |
| void ContextualGlyphInsertionProcessor2::endStateTable() |
| { |
| } |
| |
| U_NAMESPACE_END |