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