using System;
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using System.Collections.Generic;
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using System.Text;
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namespace HH.WMS.Utils.ExcelLibrary.CompoundDocumentFormat
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{
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/// <summary>
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/// Directory Entry Structure
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/// The size of each directory entry is exactly 128 bytes.
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/// </summary>
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public class DirectoryEntry : IComparable<DirectoryEntry>
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{
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/// <summary>
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/// Character array of the name of the entry, always 16-bit Unicode characters,
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/// with trailing zero character (results in a maximum name length of 31 characters)
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/// </summary>
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public char[] NameBuffer;
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/// <summary>
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/// Size of the used area of the character buffer of the name
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/// (not character count), including the trailing zero character
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/// </summary>
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public UInt16 NameDataSize;
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/// <summary>
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/// Type of the entry:
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/// 00H = Empty 03H = LockBytes (unknown)
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/// 01H = User storage 04H = Property (unknown)
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/// 02H = User stream 05H = Root storage
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/// </summary>
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public byte EntryType;
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/// <summary>
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/// Node colour of the entry: 00H = Red 01H = Black
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/// </summary>
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public byte NodeColor;
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/// <summary>
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/// DID of the left child node inside the red-black tree of all direct members of the parent storage
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/// (if this entry is a user storage or stream), ¨C1 if there is no left child
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/// </summary>
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public int LeftChildDID;
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/// <summary>
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/// DID of the right child node inside the red-black tree of all direct members of the parent storage
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/// (if this entry is a user storage or stream), ¨C1 if there is no right child
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/// </summary>
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public int RightChildDID;
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/// <summary>
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/// The directory organises direct members (storages and streams) of each storage in a separate red-black tree.
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/// DID of the root node entry of the red-black tree of all storage members
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/// (if this entry is a storage), ¨C1 otherwise
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/// </summary>
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public int MembersTreeNodeDID;
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/// <summary>
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/// Unique identifier, if this is a storage (not of interest in the following, may be all 0)
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/// </summary>
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public Guid UniqueIdentifier;
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/// <summary>
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/// User flags (not of interest in the following, may be all 0)
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/// </summary>
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public int UserFlags;
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/// <summary>
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/// Time stamp of creation of this entry.
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/// Most implementations do not write a valid time stamp, but fill up this space with zero bytes.
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/// </summary>
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public DateTime CreationTime;
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/// <summary>
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/// Time stamp of last modification of this entry.
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/// Most implementations do not write a valid time stamp, but fill up this space with zero bytes.
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/// </summary>
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public DateTime LastModificationTime;
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/// <summary>
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/// SID of first sector or short-sector, if this entry refers to a stream,
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/// SID of first sector of the short-stream container stream, if this is the root storage entry,
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/// 0 otherwise
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/// </summary>
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public int FirstSectorID;
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/// <summary>
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/// Total stream size in bytes, if this entry refers to a stream,
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/// total size of the shortstream container stream, if this is the root storage entry,
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/// 0 otherwise
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/// </summary>
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public int StreamLength;
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/// <summary>
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/// Not used
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/// </summary>
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public int UnUsed;
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public int ID = -1;
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public CompoundDocument Document;
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public DirectoryEntry Parent;
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public Dictionary<string, DirectoryEntry> Members = new Dictionary<string, DirectoryEntry>();
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internal DirectoryEntry() { }
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public DirectoryEntry(string name)
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{
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this.NameBuffer = new char[32];
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this.Name = name;
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this.CreationTime = DateTime.Now;
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this.LastModificationTime = this.CreationTime;
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this.LeftChildDID = -1;
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this.RightChildDID = -1;
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this.MembersTreeNodeDID = -1;
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this.FirstSectorID = SID.EOC;
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}
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public DirectoryEntry(CompoundDocument document, string name)
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: this(name)
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{
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Document = document;
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}
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public void AddChild(DirectoryEntry entry)
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{
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if (entry.Parent != null)
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{
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throw new ArgumentException("DirectoryEntry already has a parent.");
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}
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entry.Parent = this;
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this.Members.Add(entry.Name, entry);
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}
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byte[] data;
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public byte[] Data
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{
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get
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{
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if (data == null)
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{
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data = Document.GetStreamData(this);
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}
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return data;
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}
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set
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{
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data = value;
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}
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}
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public override string ToString()
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{
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return Name;
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}
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string name;
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public string Name
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{
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get
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{
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if (name == null)
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{
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int NameLength = NameDataSize / 2 - 1;
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if (NameLength == 1)
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{
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name = String.Empty;
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}
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else
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{
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name = new string(NameBuffer, 0, NameLength);
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}
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}
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return name;
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}
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set
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{
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if (value.Length > 31)
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{
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throw new Exception("Directory Entry Name exceeds 31 chars.");
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}
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value.ToCharArray().CopyTo(NameBuffer, 0);
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NameBuffer[value.Length] = '\0';
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NameDataSize = (UInt16)((value.Length + 1) * 2);
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name = value;
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}
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}
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#region IComparable<DirectoryEntry> ³ÉÔ±
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public int CompareTo(DirectoryEntry other)
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{
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return CompareString(this.Name, other.Name);
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}
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static int CompareString(string strA, string strB)
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{
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if (strA != null && strB != null)
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{
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if (strA.Length < strB.Length)
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{
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return -1;
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}
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else if (strA.Length > strB.Length)
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{
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return 1;
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}
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}
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return String.Compare(strA, strB, StringComparison.OrdinalIgnoreCase);
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}
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#endregion
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}
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}
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