/// <summary>
/// Parses all text record
/// </summary>
private IEnumerable <MobipocketRecord> ParseTextMobipocketRecords()
{
int bytesUsed = 0;
var parser = new TrailingEntryParser(Header.TrailingEntries);
int previousOverlapSize = 0;
//skip first record as header, and process all text records
for (int recordIndex = 0; recordIndex < Header.TextRecordCount; recordIndex++)
{
//get current record
var record = _pdb.Records[recordIndex + 1];
//read record
var mobiRecord = MobipocketRecord.FromBinary(record.Data, true, parser);
//uncompress text
mobiRecord.Text = GetRecordText(mobiRecord, previousOverlapSize, ref bytesUsed);
//yield record
yield return(mobiRecord);
//save trailing entries
previousOverlapSize = mobiRecord.TrailingEntries.IsMultibyteCharacterOverlapping ?
mobiRecord.TrailingEntries.MultibyteCharacterOverlap.Length : 0;
}
if (bytesUsed != Header.TotalTextLength)
{
throw new Exception("text length doesn't match used characters");
}
}
//---------------------------------------------
//
// Private methods
//
//---------------------------------------------
#region Private methods
private IEnumerable <MobipocketRecord> ParseMobipocketRecords()
{
foreach (var record in ParseTextMobipocketRecords())
{
AddResource(MobipocketResourceTypes.Text, record.Text);
yield return(record);
}
for (int index = (int)Header.FirstNonTextRecord; index < _pdb.Records.Count; index++)
{
var data = _pdb.Records[index].Data;
var record = MobipocketRecord.FromBinary(data);
yield return(record);
if (record.IsFLISRecord)
{
AddResource(MobipocketResourceTypes.FLIS, data);
}
else if (record.IsFCISRecord)
{
AddResource(MobipocketResourceTypes.FCIS, data);
}
else if (record.IsEOFRecord)
{
AddResource(MobipocketResourceTypes.EOF, data);
}
else
{
try
{
using (var stream = new MemoryStream(record.Data))
using (var image = Image.FromStream(stream))
{
var format = image.RawFormat;
if (format.Equals(ImageFormat.Jpeg) ||
format.Equals(ImageFormat.Gif) ||
format.Equals(ImageFormat.Bmp))
{
AddResource(MobipocketResourceTypes.Image, data);
}
else
{
throw new NotSupportedException("image not supported");
}
}
}
catch
{
AddResource(MobipocketResourceTypes.Binary, data);
}
}
}
}
