/// <summary>
/// Resolves the zone offsets for the location and text
/// </summary>
private void ResolveOffsets(TextZone parent, TextZone sibling)
{
if (parent == null && sibling == null)
{
return;
}
if (sibling == null)
{
_x += parent.Rectangle.Right;
_y = parent.Rectangle.Top - (_y + Height);
_textOffset += parent.TextOffset;
}
else
{
if (sibling.ZoneType == ZoneTypes.Page || sibling.ZoneType == ZoneTypes.Paragraph || sibling.ZoneType == ZoneTypes.Line)
{
_x = _x + sibling.Rectangle.Right;
_y = sibling.Rectangle.Bottom - (_y + _height);
}
else if (sibling.ZoneType == ZoneTypes.Column || sibling.ZoneType == ZoneTypes.Word || sibling.ZoneType == ZoneTypes.Character)
{
_x += sibling.Rectangle.Left;
_y += sibling.Rectangle.Bottom;
}
_textOffset += sibling.TextOffset + sibling.TextLength;
}
}
public TextZone(DjvuReader reader, TextZone parent, TextZone sibling, TextChunk chunkParent)
{
_parent = parent;
_chunkParent = chunkParent;
DecodeZoneData(reader, sibling, chunkParent);
}
/// <summary>
/// Decodes the data for the zone
/// </summary>
/// <param name="reader"></param>
private void DecodeZoneData(DjvuReader reader, TextZone sibling, TextChunk chunkParent)
{
_zoneType = (ZoneTypes)reader.ReadByte();
_x = reader.ReadUInt16BigEndian() - 0x8000;
_y = reader.ReadUInt16BigEndian() - 0x8000;
_width = reader.ReadUInt16BigEndian() - 0x8000;
_height = reader.ReadUInt16BigEndian() - 0x8000;
_textOffset = reader.ReadUInt16BigEndian() - 0x8000;
_textLength = reader.ReadInt24BigEndian();
ResolveOffsets(_parent, sibling);
_rectangle = new Rectangle(_x, _y, _width, _height);
int childrenZones = reader.ReadInt24BigEndian();
List <TextZone> children = new List <TextZone>();
TextZone childrenSibling = null;
for (int x = 0; x < childrenZones; x++)
{
TextZone newZone = new TextZone(reader, this, childrenSibling, chunkParent);
childrenSibling = newZone;
children.Add(newZone);
}
_children = children.ToArray();
}
public TextZone(DjvuReader reader, TextZone parent, TextZone sibling, TextChunk chunkParent)
{
_parent = parent;
_chunkParent = chunkParent;
DecodeZoneData(reader, sibling, chunkParent);
}
/// <summary>
/// Reads the compressed text data
/// </summary>
private void ReadCompressedTextData()
{
if (Length == 0)
{
return;
}
using (DjvuReader reader = GetTextDataReader(_dataLocation))
{
_textLength = reader.ReadInt24MSB();
byte[] textBytes = reader.ReadBytes(_textLength);
_text = Encoding.UTF7.GetString(textBytes);
_version = reader.ReadSByte();
_zone = new TextZone(reader, null, null, this);
}
_isDecoded = true;
}
/// <summary>
/// Reads the compressed text data
/// </summary>
private void ReadCompressedTextData()
{
if (Length > 0)
{
using (DjvuReader reader = GetTextDataReader(_dataLocation))
{
int length = (int)reader.ReadUInt24BigEndian();
byte[] textBytes = reader.ReadBytes(length);
TextBytes = textBytes;
Text = Encoding.UTF8.GetString(textBytes);
TextLength = _text.Length;
Version = reader.ReadByte();
Zone = new TextZone(reader, null, null, this);
}
}
_isDecoded = true;
/* if (Length == 0) return;
*
* using (DjvuReader reader = GetTextDataReader(_dataLocation))
* {
* _textLength = (int)reader.ReadUInt24BigEndian();
* byte[] textBytes = reader.ReadBytes(_textLength);
* _text = Encoding.UTF8.GetString(textBytes);
* if (_text.Contains("предварительной"))
* {
*
* }
*
*
*
* _version = reader.ReadByte();
* _textLength = _text.Length;
*
* _zone = new TextZone(reader, null, null, this);
* }
*
* _isDecoded = true;*/
}
/// <summary>
/// Reads the compressed text data
/// </summary>
private void ReadCompressedTextData()
{
if (Length == 0) return;
using (DjvuReader reader = GetTextDataReader(_dataLocation))
{
_textLength = reader.ReadInt24MSB();
byte[] textBytes = reader.ReadBytes(_textLength);
_text = Encoding.UTF7.GetString(textBytes);
_version = reader.ReadSByte();
_zone = new TextZone(reader, null, null, this);
}
_isDecoded = true;
}
public PageTextItem(DjvuPage page, PageTextSearch parent, TextZone zone)
: base(page)
{
_zone = zone;
_parent = parent;
}
public PageTextSearch(DjvuPage page, TextZone[] items)
: base(page)
{
_textItems = items.Select(x => new PageTextItem(page, this, x)).ToArray();
}
/// <summary>
/// Resolves the zone offsets for the location and text
/// </summary>
private void ResolveOffsets(TextZone parent, TextZone sibling)
{
if (parent == null && sibling == null) return;
if (sibling == null)
{
_x += parent.Rectangle.Right;
_y = parent.Rectangle.Top - (_y + Height);
_textOffset += parent.TextOffset;
}
else
{
if (sibling.ZoneType == ZoneTypes.Page || sibling.ZoneType == ZoneTypes.Paragraph || sibling.ZoneType == ZoneTypes.Line)
{
_x = _x + sibling.Rectangle.Right;
_y = sibling.Rectangle.Bottom - (_y + _height);
}
else if (sibling.ZoneType == ZoneTypes.Column || sibling.ZoneType == ZoneTypes.Word || sibling.ZoneType == ZoneTypes.Character)
{
_x += sibling.Rectangle.Left;
_y += sibling.Rectangle.Bottom;
}
_textOffset += sibling.TextOffset + sibling.TextLength;
}
}
/// <summary>
/// Decodes the data for the zone
/// </summary>
/// <param name="reader"></param>
private void DecodeZoneData(DjvuReader reader, TextZone sibling, TextChunk chunkParent)
{
_zoneType = (ZoneTypes)reader.ReadByte();
_x = reader.ReadUInt16MSB() - 0x8000;
_y = reader.ReadUInt16MSB() - 0x8000;
_width = reader.ReadUInt16MSB() - 0x8000;
_height = reader.ReadUInt16MSB() - 0x8000;
_textOffset = reader.ReadUInt16MSB() - 0x8000;
_textLength = reader.ReadInt24MSB();
ResolveOffsets(_parent, sibling);
_rectangle = new Rectangle(_x, _y, _width, _height);
int childrenZones = reader.ReadInt24MSB();
List<TextZone> children = new List<TextZone>();
TextZone childrenSibling = null;
for (int x = 0; x < childrenZones; x++)
{
TextZone newZone = new TextZone(reader, this, childrenSibling, chunkParent);
childrenSibling = newZone;
children.Add(newZone);
}
_children = children.ToArray();
}
