1 files changed, 68 insertions, 0 deletions
diff --git a/Build/source/libs/icu/icu-xetex/layout/LigatureSubstSubtables.cpp b/Build/source/libs/icu/icu-xetex/layout/LigatureSubstSubtables.cpp
new file mode 100644
index 00000000000..391ffe649ee
--- /dev/null
+++ b/Build/source/libs/icu/icu-xetex/layout/LigatureSubstSubtables.cpp
@@ -0,0 +1,68 @@
+/*
+ * (C) Copyright IBM Corp. 1998-2006 - All Rights Reserved
+ *
+ */
+
+#include "LETypes.h"
+#include "LEGlyphFilter.h"
+#include "OpenTypeTables.h"
+#include "GlyphSubstitutionTables.h"
+#include "LigatureSubstSubtables.h"
+#include "GlyphIterator.h"
+#include "LESwaps.h"
+
+U_NAMESPACE_BEGIN
+
+le_uint32 LigatureSubstitutionSubtable::process(GlyphIterator *glyphIterator, const LEGlyphFilter *filter) const
+{
+    LEGlyphID glyph = glyphIterator->getCurrGlyphID();
+    le_int32 coverageIndex = getGlyphCoverage(glyph);
+
+    if (coverageIndex >= 0) {
+        Offset ligSetTableOffset = SWAPW(ligSetTableOffsetArray[coverageIndex]);
+        const LigatureSetTable *ligSetTable = (const LigatureSetTable *) ((char *) this + ligSetTableOffset);
+        le_uint16 ligCount = SWAPW(ligSetTable->ligatureCount);
+
+        for (le_uint16 lig = 0; lig < ligCount; lig += 1) {
+            Offset ligTableOffset = SWAPW(ligSetTable->ligatureTableOffsetArray[lig]);
+            const LigatureTable *ligTable = (const LigatureTable *) ((char *)ligSetTable + ligTableOffset);
+            le_uint16 compCount = SWAPW(ligTable->compCount) - 1;
+            le_int32 startPosition = glyphIterator->getCurrStreamPosition();
+            TTGlyphID ligGlyph = SWAPW(ligTable->ligGlyph);
+            le_uint16 comp;
+
+            for (comp = 0; comp < compCount; comp += 1) {
+                if (! glyphIterator->next()) {
+                    break;
+                }
+
+                if (LE_GET_GLYPH(glyphIterator->getCurrGlyphID()) != SWAPW(ligTable->componentArray[comp])) {
+                    break;
+                }
+            }
+
+            if (comp == compCount && (filter == NULL || filter->accept(LE_SET_GLYPH(glyph, ligGlyph)))) {
+                GlyphIterator tempIterator(*glyphIterator);
+                TTGlyphID deletedGlyph = tempIterator.ignoresMarks()? 0xFFFE : 0xFFFF;
+
+                while (comp > 0) {
+                    tempIterator.setCurrGlyphID(deletedGlyph);
+                    tempIterator.prev();
+
+                    comp -= 1;
+                }
+
+                tempIterator.setCurrGlyphID(ligGlyph);
+
+                return compCount + 1;
+            }
+
+            glyphIterator->setCurrStreamPosition(startPosition);
+        }
+
+    }
+
+    return 0;
+}
+
+U_NAMESPACE_END