mirror of
https://github.com/reactos/reactos.git
synced 2024-11-07 15:10:53 +00:00
821 lines
21 KiB
C#
821 lines
21 KiB
C#
using System;
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using System.Collections;
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using System.Diagnostics;
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using System.IO;
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using System.Text;
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using System.Globalization;
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namespace HtmlHelp.ChmDecoding
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{
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/// <summary>
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/// The class <c>CHMSystem</c> reads the #SYSTEM file of the chm and stores its settings
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/// </summary>
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internal sealed class CHMSystem : IDisposable
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{
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/// <summary>
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/// Internal flag specifying if the object is going to be disposed
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/// </summary>
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private bool disposed = false;
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/// <summary>
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/// Internal member storing the binary file data
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/// </summary>
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private byte[] _binaryFileData = null;
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/// <summary>
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/// Internal member storing the file version
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/// </summary>
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private int _fileVersion = 0;
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/// <summary>
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/// Internal member storing the contents file path
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/// </summary>
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private string _contentsFile = "";
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/// <summary>
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/// Internal member storing the index file path
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/// </summary>
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private string _indexFile = "";
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/// <summary>
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/// Internal member storing the default help topic
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/// </summary>
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private string _defaultTopic = "";
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/// <summary>
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/// Internal member storing the help-window title
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/// </summary>
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private string _title = "";
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/// <summary>
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/// Internal flag if dbcs is on
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/// </summary>
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private bool _dbcs = false;
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/// <summary>
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/// Internal flag if fulltext search is enabled
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/// </summary>
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private bool _fullTextSearch = false;
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/// <summary>
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/// Internal flag if KLinks are in the file
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/// </summary>
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private bool _hasKLinks = false;
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/// <summary>
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/// Internal flag if ALinks are in the file
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/// </summary>
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private bool _hasALinks = false;
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/// <summary>
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/// Internal member storing the name of the default window
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/// </summary>
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private string _defaultWindow = "";
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/// <summary>
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/// Internal member storing the filename of the compiled file
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/// </summary>
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private string _compileFile = "";
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/// <summary>
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/// Internal flag storing the offset value of the binary index
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/// </summary>
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private uint _binaryIndexURLTableID = 0;
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/// <summary>
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/// Inernal member storing the compiler version this file was compiled
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/// </summary>
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private string _compilerVersion = "";
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/// <summary>
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/// Internal flag storing the offset value of the binary TOC
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/// </summary>
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private uint _binaryTOCURLTableID = 0;
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/// <summary>
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/// Internal member storing the associated chmfile object
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/// </summary>
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private CHMFile _associatedFile = null;
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/// <summary>
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/// Internal member storing the default fontface, size, charset
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/// </summary>
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private string _defaultFont = "";
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/// <summary>
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/// Internal member storing the culture info of the file
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/// </summary>
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private CultureInfo _culture;
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/// <summary>
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/// Constructor of the class
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/// </summary>
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/// <param name="binaryFileData">binary file data of the #SYSTEM file</param>
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/// <param name="associatedFile">associated chm file</param>
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public CHMSystem(byte[] binaryFileData, CHMFile associatedFile)
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{
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_binaryFileData = binaryFileData;
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_associatedFile = associatedFile;
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DecodeData();
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if(_culture == null)
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{
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// Set the text encoder of the chm file to the read charset/codepage
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_associatedFile.TextEncoding = Encoding.GetEncoding( this.CodePage );
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}
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}
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/// <summary>
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/// Decodes the binary file data and fills the internal properties
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/// </summary>
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/// <returns>true if succeeded</returns>
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private bool DecodeData()
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{
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bool bRet = true;
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MemoryStream memStream = new MemoryStream(_binaryFileData);
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BinaryReader binReader = new BinaryReader(memStream);
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// First entry = DWORD for version number
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_fileVersion = (int) binReader.ReadInt32();
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while( (memStream.Position < memStream.Length) && (bRet) )
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{
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bRet &= DecodeEntry(ref binReader);
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}
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return bRet;
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}
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/// <summary>
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/// Decodes an #system file entry
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/// </summary>
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/// <param name="binReader">binary reader reference</param>
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/// <returns>true if succeeded</returns>
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private bool DecodeEntry(ref BinaryReader binReader)
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{
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bool bRet = true;
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int code = (int) binReader.ReadInt16(); // entry code, WORD
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int length = (int) binReader.ReadInt16(); // length of entry
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switch(code)
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{
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case 0:
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{
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_contentsFile = BinaryReaderHelp.ExtractString(ref binReader,length, 0, true, _associatedFile.TextEncoding);
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};break;
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case 1:
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{
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_indexFile = BinaryReaderHelp.ExtractString(ref binReader,length, 0, true, _associatedFile.TextEncoding);
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};break;
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case 2:
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{
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_defaultTopic = BinaryReaderHelp.ExtractString(ref binReader,length, 0, true, _associatedFile.TextEncoding);
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};break;
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case 3:
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{
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_title = BinaryReaderHelp.ExtractString(ref binReader,length, 0, true, _associatedFile.TextEncoding);
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};break;
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case 4:
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{
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int nTemp = 0;
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nTemp = binReader.ReadInt32(); // read DWORD LCID
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_culture = new CultureInfo(nTemp);
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if(_culture != null)
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_associatedFile.TextEncoding = Encoding.GetEncoding(_culture.TextInfo.ANSICodePage);
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nTemp = binReader.ReadInt32(); // read DWORD DBCS
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_dbcs = (nTemp == 1);
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nTemp = binReader.ReadInt32(); // read DWORD Fulltext search
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_fullTextSearch = (nTemp == 1);
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nTemp = binReader.ReadInt32(); // read DWORD has klinks
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_hasKLinks = (nTemp != 0);
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nTemp = binReader.ReadInt32(); // read DWORD has alinks
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_hasALinks = (nTemp != 0);
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// read the rest of code 4 (not important for us)
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byte[] temp = new byte[length-(5*4)];
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temp = binReader.ReadBytes(length-(5*4));
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};break;
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case 5:
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{
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_defaultWindow = BinaryReaderHelp.ExtractString(ref binReader,length, 0, true, _associatedFile.TextEncoding);
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};break;
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case 6:
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{
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_compileFile = BinaryReaderHelp.ExtractString(ref binReader,length, 0, true, _associatedFile.TextEncoding);
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};break;
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case 7:
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{
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if(_fileVersion > 2)
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{
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_binaryIndexURLTableID = (uint) binReader.ReadInt32();
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}
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else
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{
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byte[] read = binReader.ReadBytes(length);
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int i=read.Length;
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}
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};break;
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case 8:
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{
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// abbreviation (not interresting for us)
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byte[] read = binReader.ReadBytes(length);
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int i=read.Length;
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};break;
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case 9:
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{
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_compilerVersion = BinaryReaderHelp.ExtractString(ref binReader,length, 0, true, _associatedFile.TextEncoding);
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};break;
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case 10:
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{
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// timestamp of the file (not interresting for us)
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byte[] read = binReader.ReadBytes(length);
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int i=read.Length;
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};break;
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case 11:
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{
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if(_fileVersion > 2)
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{
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_binaryTOCURLTableID = (uint) binReader.ReadInt32();
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}
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else
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{
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byte[] read = binReader.ReadBytes(length);
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int i=read.Length;
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}
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};break;
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case 12:
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{
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// number of information bytes
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byte[] read = binReader.ReadBytes(length);
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int i=read.Length;
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};break;
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case 13:
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{
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// copy of file #idxhdr
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byte[] read = binReader.ReadBytes(length);
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int i=read.Length;
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};break;
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case 14:
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{
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// custom tabs for HH viewer
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byte[] read = binReader.ReadBytes(length);
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int i=read.Length;
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};break;
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case 15:
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{
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// a checksum
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byte[] read = binReader.ReadBytes(length);
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int i=read.Length;
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};break;
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case 16:
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{
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// Default Font=string,number,number
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// The string is the name of the font, the first number is the
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// point size & the last number is the character set used by the font.
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// For acceptable values see *_CHARSET defines in wingdi.h from the
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// Windows SDK or the same file in MinGW or Wine.
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// Most of the time you will only want to use 0, which is the value for ANSI,
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// which is the subset of ASCII used by Windows.
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_defaultFont = BinaryReaderHelp.ExtractString(ref binReader,length, 0, true, _associatedFile.TextEncoding);
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};break;
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default:
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{
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byte[] temp = new byte[length];
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temp = binReader.ReadBytes(length);
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//bRet = false;
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int i=temp.Length;
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};break;
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}
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return bRet;
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}
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/// <summary>
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/// Reads all HHC files and checks which one has the global object tag.
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/// This hhc file will be returned as master hhc
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/// </summary>
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/// <param name="hhcTopics">list of topics containing the extension hhc</param>
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/// <param name="TopicItemArrayList">true if the arraylist contains topic items</param>
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/// <returns>the filename of the found master toc</returns>
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private string GetMasterHHC(ArrayList hhcTopics, bool TopicItemArrayList)
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{
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string sRet = "";
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if( (hhcTopics!=null) && (hhcTopics.Count > 0) )
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{
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if( TopicItemArrayList )
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{
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if(hhcTopics.Count == 1)
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{
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sRet = ((TopicEntry)hhcTopics[0]).Locale;
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}
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else
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{
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foreach(TopicEntry curEntry in hhcTopics)
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{
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CHMStream.CHMStream iw=null;
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MemoryStream fileObject=null;
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if( _associatedFile.CurrentStorageWrapper == null)
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{
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iw=new CHMStream.CHMStream();
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iw.OpenCHM(_associatedFile.ChmFilePath);
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}
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else
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{
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iw = _associatedFile.CurrentStorageWrapper;
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}
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fileObject = iw.OpenStream(curEntry.Locale);
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if( fileObject != null)
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{
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string fileString =_associatedFile.TextEncoding.GetString(fileObject.ToArray(),0,(int)fileObject.Length);
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fileObject.Close();
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if( HHCParser.HasGlobalObjectTag(fileString, _associatedFile) )
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{
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sRet = curEntry.Locale;
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break;
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}
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}
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}
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}
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}
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else
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{
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if(hhcTopics.Count == 1)
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{
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sRet = ((string)hhcTopics[0]);
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}
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else
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{
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foreach(string curEntry in hhcTopics)
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{
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CHMStream.CHMStream iw=null;
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MemoryStream fileObject=null;
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if( _associatedFile.CurrentStorageWrapper == null)
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{
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iw=new CHMStream.CHMStream();
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iw.OpenCHM(_associatedFile.ChmFilePath);
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}
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else
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{
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iw = _associatedFile.CurrentStorageWrapper;
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}
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fileObject = iw.OpenStream(curEntry);
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if( fileObject != null)
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{
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string fileString =_associatedFile.TextEncoding.GetString(fileObject.ToArray(),0,(int)fileObject.Length);
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fileObject.Close();
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if( HHCParser.HasGlobalObjectTag(fileString, _associatedFile) )
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{
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sRet = curEntry;
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break;
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}
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}
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}
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}
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}
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}
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return sRet;
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}
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/// <summary>
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/// Gets the file version of the chm file.
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/// 2 for Compatibility=1.0, 3 for Compatibility=1.1
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/// </summary>
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public int FileVersion
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{
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get { return _fileVersion; }
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}
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/// <summary>
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/// Gets the contents file name
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/// </summary>
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public string ContentsFile
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{
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get
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{
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if( BinaryTOC ) // if the file contains a binary TOC
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{
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// make sure the CHMFile instance exists and has loaded the file #URLTBL
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if( (_associatedFile != null) && (_associatedFile.UrltblFile != null ) )
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{
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// Get an url-table entry by its unique id
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UrlTableEntry entry = _associatedFile.UrltblFile.GetByUniqueID( this.BinaryTOCURLTableID );
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if(entry != null)
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{
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// entry found, return the url ( = filename )
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return entry.URL;
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}
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}
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}
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else
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{
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if(_contentsFile.Length <= 0)
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{
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string sCheck = "Table of Contents.hhc"; // default HHP contents filename
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if( (_associatedFile != null) && (_associatedFile.TopicsFile != null ) )
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{
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TopicEntry te = _associatedFile.TopicsFile.GetByLocale( sCheck );
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if( te == null)
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{
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sCheck = "toc.hhc"; // default HHP contents filename
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te = _associatedFile.TopicsFile.GetByLocale( sCheck );
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if( te == null)
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{
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sCheck = CompileFile + ".hhc";
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te = _associatedFile.TopicsFile.GetByLocale( sCheck );
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if( te == null)
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{
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ArrayList arrExt = _associatedFile.TopicsFile.GetByExtension("hhc");
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if( arrExt == null )
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{
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arrExt = _associatedFile.EnumFilesByExtension("hhc");
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if( arrExt == null )
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{
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Debug.WriteLine("CHMSystem.ContentsFile - Failed, contents file not found !");
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}
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else
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{
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if(arrExt.Count > 1)
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{
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sCheck = GetMasterHHC(arrExt, false);
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_contentsFile = sCheck;
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}
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else
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{
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_contentsFile = ((string)arrExt[0]);
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sCheck = _contentsFile;
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}
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}
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}
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else
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{
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if(arrExt.Count > 1)
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{
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sCheck = GetMasterHHC(arrExt, true);
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_contentsFile = sCheck;
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}
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else
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{
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_contentsFile = ((TopicEntry)arrExt[0]).Locale;
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sCheck = _contentsFile;
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}
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}
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}
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else
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{
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_contentsFile = sCheck;
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}
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}
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else
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{
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_contentsFile = sCheck;
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}
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}
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else
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{
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_contentsFile = sCheck;
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}
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}
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return sCheck;
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}
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}
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return _contentsFile;
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}
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}
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/// <summary>
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/// Gets the index file name
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/// </summary>
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public string IndexFile
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{
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get
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{
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if( BinaryIndex ) // if the file contains a binary index
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{
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// make sure the CHMFile instance exists and has loaded the file #URLTBL
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if( (_associatedFile != null) && (_associatedFile.UrltblFile != null ) )
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{
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// Get an url-table entry by its unique id
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UrlTableEntry entry = _associatedFile.UrltblFile.GetByUniqueID( this.BinaryIndexURLTableID );
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if(entry != null)
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{
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// entry found, return the url ( = filename )
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return entry.URL;
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}
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}
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}
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else
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{
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if(_indexFile.Length <= 0)
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{
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string sCheck = "Index.hhk"; // default HHP index filename
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if( (_associatedFile != null) && (_associatedFile.TopicsFile != null ) )
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{
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TopicEntry te = _associatedFile.TopicsFile.GetByLocale( sCheck );
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if( te == null)
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{
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sCheck = CompileFile + ".hhk";
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te = _associatedFile.TopicsFile.GetByLocale( sCheck );
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if( te == null)
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{
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ArrayList arrExt = _associatedFile.TopicsFile.GetByExtension("hhk");
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if( arrExt == null )
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{
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Debug.WriteLine("CHMSystem.IndexFile - Failed, index file not found !");
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}
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else
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{
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_indexFile = ((TopicEntry)arrExt[0]).Locale;
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sCheck = _indexFile;
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}
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}
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else
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{
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_indexFile = sCheck;
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}
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}
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else
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{
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_indexFile = sCheck;
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}
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}
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return sCheck;
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}
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}
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return _indexFile;
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}
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}
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/// <summary>
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/// Sets the default topic of this file
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/// </summary>
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/// <param name="local">new local value of the topic</param>
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internal void SetDefaultTopic(string local)
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{
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_defaultTopic = local;
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}
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|
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/// <summary>
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/// Gets the default help topic
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/// </summary>
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public string DefaultTopic
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{
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get { return _defaultTopic; }
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}
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|
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/// <summary>
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|
/// Gets the title of the help window
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/// </summary>
|
|
public string Title
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{
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get { return _title; }
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}
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|
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/// <summary>
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/// Gets the flag if DBCS is in use
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/// </summary>
|
|
public bool DBCS
|
|
{
|
|
get { return _dbcs; }
|
|
}
|
|
|
|
/// <summary>
|
|
/// Gets the flag if full-text-search is available
|
|
/// </summary>
|
|
public bool FullTextSearch
|
|
{
|
|
get { return _fullTextSearch; }
|
|
}
|
|
|
|
/// <summary>
|
|
/// Gets the flag if the file has ALinks
|
|
/// </summary>
|
|
public bool HasALinks
|
|
{
|
|
get { return _hasALinks; }
|
|
}
|
|
|
|
/// <summary>
|
|
/// Gets the flag if the file has KLinks
|
|
/// </summary>
|
|
public bool HasKLinks
|
|
{
|
|
get { return _hasKLinks; }
|
|
}
|
|
|
|
/// <summary>
|
|
/// Gets the default window name
|
|
/// </summary>
|
|
public string DefaultWindow
|
|
{
|
|
get { return _defaultWindow; }
|
|
}
|
|
|
|
/// <summary>
|
|
/// Gets the file name of the compile file
|
|
/// </summary>
|
|
public string CompileFile
|
|
{
|
|
get { return _compileFile; }
|
|
}
|
|
|
|
/// <summary>
|
|
/// Gets the id of the binary index in the url table
|
|
/// </summary>
|
|
public uint BinaryIndexURLTableID
|
|
{
|
|
get { return _binaryIndexURLTableID; }
|
|
}
|
|
|
|
/// <summary>
|
|
/// Gets the flag if the chm has a binary index file
|
|
/// </summary>
|
|
public bool BinaryIndex
|
|
{
|
|
get { return (_binaryIndexURLTableID>0); }
|
|
}
|
|
|
|
/// <summary>
|
|
/// Gets the flag if the chm has a binary index file
|
|
/// </summary>
|
|
public string CompilerVersion
|
|
{
|
|
get { return _compilerVersion; }
|
|
}
|
|
|
|
/// <summary>
|
|
/// Gets the id of the binary toc in the url table
|
|
/// </summary>
|
|
public uint BinaryTOCURLTableID
|
|
{
|
|
get { return _binaryTOCURLTableID; }
|
|
}
|
|
|
|
/// <summary>
|
|
/// Gets the flag if the chm has a binary toc file
|
|
/// </summary>
|
|
public bool BinaryTOC
|
|
{
|
|
get { return (_binaryTOCURLTableID>0); }
|
|
}
|
|
|
|
/// <summary>
|
|
/// Gets the font face of the read font property.
|
|
/// Empty string for default font.
|
|
/// </summary>
|
|
public string FontFace
|
|
{
|
|
get
|
|
{
|
|
if( _defaultFont.Length > 0)
|
|
{
|
|
string [] fontSplit = _defaultFont.Split( new char[]{','});
|
|
if(fontSplit.Length > 0)
|
|
return fontSplit[0].Trim();
|
|
}
|
|
|
|
return "";
|
|
}
|
|
}
|
|
|
|
/// <summary>
|
|
/// Gets the font size of the read font property.
|
|
/// 0 for default font size
|
|
/// </summary>
|
|
public double FontSize
|
|
{
|
|
get
|
|
{
|
|
if( _defaultFont.Length > 0)
|
|
{
|
|
string [] fontSplit = _defaultFont.Split( new char[]{','});
|
|
if(fontSplit.Length > 1)
|
|
return double.Parse(fontSplit[1].Trim());
|
|
}
|
|
|
|
return 0.0;
|
|
}
|
|
}
|
|
|
|
/// <summary>
|
|
/// Gets the character set of the read font property
|
|
/// 1 for default
|
|
/// </summary>
|
|
public int CharacterSet
|
|
{
|
|
get
|
|
{
|
|
if( _defaultFont.Length > 0)
|
|
{
|
|
string [] fontSplit = _defaultFont.Split( new char[]{','});
|
|
if(fontSplit.Length > 2)
|
|
return Int32.Parse(fontSplit[2].Trim());
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
/// <summary>
|
|
/// Gets the codepage depending on the read font property
|
|
/// </summary>
|
|
public int CodePage
|
|
{
|
|
get
|
|
{
|
|
// if we've read a LCID from the system file
|
|
// ignore the font-property settings and return
|
|
// the codepage generated from the culture info
|
|
if(_culture != null)
|
|
{
|
|
return _culture.TextInfo.ANSICodePage;
|
|
}
|
|
|
|
int nRet = 1252; // default codepage windows-1252
|
|
|
|
int nCSet = CharacterSet;
|
|
|
|
switch(nCSet)
|
|
{
|
|
case 0x00: nRet = 1252;break; // ANSI_CHARSET
|
|
case 0xCC: nRet = 1251;break; // RUSSIAN_CHARSET
|
|
case 0xEE: nRet = 1250;break; // EE_CHARSET
|
|
case 0xA1: nRet = 1253;break; // GREEK_CHARSET
|
|
case 0xA2: nRet = 1254;break; // TURKISH_CHARSET
|
|
case 0xBA: nRet = 1257;break; // BALTIC_CHARSET
|
|
case 0xB1: nRet = 1255;break; // HEBREW_CHARSET
|
|
case 0xB2: nRet = 1256;break; // ARABIC_CHARSET
|
|
case 0x80: nRet = 932;break; // SHIFTJIS_CHARSET
|
|
case 0x81: nRet = 949;break; // HANGEUL_CHARSET
|
|
case 0x86: nRet = 936;break; // GB2313_CHARSET
|
|
case 0x88: nRet = 950;break; // CHINESEBIG5_CHARSET
|
|
}
|
|
|
|
return nRet;
|
|
}
|
|
}
|
|
|
|
/// <summary>
|
|
/// Gets the assiciated culture info
|
|
/// </summary>
|
|
public CultureInfo Culture
|
|
{
|
|
get { return _culture; }
|
|
}
|
|
|
|
/// <summary>
|
|
/// Implement IDisposable.
|
|
/// </summary>
|
|
public void Dispose()
|
|
{
|
|
Dispose(true);
|
|
// This object will be cleaned up by the Dispose method.
|
|
// Therefore, you should call GC.SupressFinalize to
|
|
// take this object off the finalization queue
|
|
// and prevent finalization code for this object
|
|
// from executing a second time.
|
|
GC.SuppressFinalize(this);
|
|
}
|
|
|
|
/// <summary>
|
|
/// Dispose(bool disposing) executes in two distinct scenarios.
|
|
/// If disposing equals true, the method has been called directly
|
|
/// or indirectly by a user's code. Managed and unmanaged resources
|
|
/// can be disposed.
|
|
/// If disposing equals false, the method has been called by the
|
|
/// runtime from inside the finalizer and you should not reference
|
|
/// other objects. Only unmanaged resources can be disposed.
|
|
/// </summary>
|
|
/// <param name="disposing">disposing flag</param>
|
|
private void Dispose(bool disposing)
|
|
{
|
|
// Check to see if Dispose has already been called.
|
|
if(!this.disposed)
|
|
{
|
|
// If disposing equals true, dispose all managed
|
|
// and unmanaged resources.
|
|
if(disposing)
|
|
{
|
|
// Dispose managed resources.
|
|
_binaryFileData = null;
|
|
}
|
|
|
|
|
|
}
|
|
disposed = true;
|
|
}
|
|
}
|
|
}
|