package tv.porst.swfretools.parser.tags;
import static tv.porst.swfretools.parser.SWFParserHelpers.parseUBits;
import static tv.porst.swfretools.parser.SWFParserHelpers.parseUINT16;
import java.util.ArrayList;
import java.util.List;
import tv.porst.splib.binaryparser.UBits;
import tv.porst.splib.binaryparser.UINT16;
import tv.porst.swfretools.parser.SWFBinaryParser;
import tv.porst.swfretools.parser.SWFParserException;
import tv.porst.swfretools.parser.structures.RecordHeader;
import tv.porst.swfretools.parser.structures.ZoneRecord;
import tv.porst.swfretools.parser.structures.ZoneRecordList;
import tv.porst.swfretools.parser.structures.ZoneRecordParser;
/**
* Class for parsing DefineFontAlignZones tags.
*/
public final class DefineFontAlignZonesParser {
/**
* Calculates the length in bytes of a zone record.
*
* @param zoneRecord The zone record whose length is calculated.
*
* @return The length of the zone record in bytes.
*/
private static int calculateLength(final ZoneRecord zoneRecord) {
return 1 + zoneRecord.getZoneData().size() * 4 + 1;
}
/**
* Parses a DefineFontAlignZones tag.
*
* @param parser Provides the input data.
* @param header Previously parsed header of the tag.
*
* @return Returns the parsed tag.
*
* @throws SWFParserException Thrown if parsing the tag failed.
*/
public static DefineFontAlignZonesTag parse(final RecordHeader header, final SWFBinaryParser parser) throws SWFParserException {
final UINT16 fontId = parseUINT16(parser, 0x00006, "DefineFontAlignZones::FontId");
final UBits csmTableHint = parseUBits(parser, 2, 0x00006, "DefineFontAlignZones::CSMTableHint");
final UBits reserved = parseUBits(parser, 6, 0x00006, "DefineFontAlignZones::Reserved");
final List<ZoneRecord> zoneTable = new ArrayList<ZoneRecord>();
int toParse = header.getNormalizedLength() - 2 - 1;
while (toParse > 0) {
final ZoneRecord zoneRecord = ZoneRecordParser.parse(parser, String.format("DefineFontAlignZones::ZoneTable[%d]", zoneTable.size()));
zoneTable.add(zoneRecord);
toParse -= calculateLength(zoneRecord);
}
return new DefineFontAlignZonesTag(header, fontId, csmTableHint, reserved, new ZoneRecordList(zoneTable));
}
}