private static string GetPreMarks(ChunkBase tree)
{
var parent = tree.Parent;
if (parent == null) return string.Empty;
List<bool> lstline = new List<bool>();
while (parent != null)
{
var pp = parent.Parent;
if (pp != null)
{
lstline.Add(pp.Children.IndexOf(parent) < pp.Children.Count - 1);
}
parent = pp;
}
StringBuilder builder = new StringBuilder();
for (int i = lstline.Count - 1; i >= 0; i--)
{
if (lstline[i])
builder.Append("│ ");
else
builder.Append(" ");
}
parent = tree.Parent;
if (parent.Children.IndexOf(tree) < parent.Children.Count - 1)
builder.Append("├─");
else
builder.Append("└─");
return builder.ToString();
}
internal void ChunkBaseProcess(ParsingContext context)
{
var chunk = this;
var reader = context.reader;
while (chunk.BytesRead + ChunkBaseHelper.HeaderLength < chunk.Length)//如果还能读出一个子chunk。
{
ChunkBase child = reader.ReadChunk();
child.Parent = this;
this.Children.Add(child);
child.Process(context);
chunk.BytesRead += child.BytesRead;
}
{
var parent = this.Parent;
uint length = this.Length - this.BytesRead;
if (length > 0)
{
if ((parent != null))
{
var another = parent.Length - parent.BytesRead - this.BytesRead;
length = Math.Min(length, another);
}
reader.BaseStream.Position += length;
chunk.BytesRead += length;
}
}
}
public static ChunkBase ReadChunk(this BinaryReader reader)
{
long position = reader.BaseStream.Position;
// 2 byte ID
ushort id = reader.ReadUInt16();
// 4 byte length
uint length = reader.ReadUInt32();
// 2 + 4 = 6
uint bytesRead = HeaderLength;
Type type;
if (chunkIDDict.TryGetValue(id, out type))
{
object obj = Activator.CreateInstance(type);
ChunkBase result = obj as ChunkBase;
//result.ID = id;//不再需要记录ID，此对象的类型就指明了它的ID。
result.Position = position;
result.Length = length;
result.BytesRead = bytesRead;
return(result);
}
else
{
return(new UndefinedChunk()
{
Position = position, ID = id, Length = length, BytesRead = bytesRead,
});
}
}
public static string DumpToText(this ChunkBase chunk)
{
StringBuilder builder = new StringBuilder();
int tabSpace = 0;
GetBuilder(builder, chunk, ref tabSpace);
return(builder.ToString());
}
private static void GetBuilder(StringBuilder builder, ChunkBase tree, ref int tabSpace)
{
//builder.AppendLine(GetSpace(tabSpace) + tree.NodeValue.ToString());
//builder.AppendLine(GetBrantch(tabSpace)/*GetSpace(tabSpace)*/ + tree.NodeValue.ToString());
//builder.AppendLine(GetPreMarks(tree)/*GetSpace(tabSpace)*/ + tree.NodeValue.ToString());
builder.AppendLine(GetPreMarks(tree)/*GetSpace(tabSpace)*/ + tree.ToString());
tabSpace++;
foreach (var item in tree.Children)
{
GetBuilder(builder, item, ref tabSpace);
}
tabSpace--;
}
private static void GetBuilder(StringBuilder builder, ChunkBase tree, ref int tabSpace)
{
//builder.AppendLine(GetSpace(tabSpace) + tree.NodeValue.ToString());
//builder.AppendLine(GetBrantch(tabSpace)/*GetSpace(tabSpace)*/ + tree.NodeValue.ToString());
//builder.AppendLine(GetPreMarks(tree)/*GetSpace(tabSpace)*/ + tree.NodeValue.ToString());
builder.AppendLine(GetPreMarks(tree) /*GetSpace(tabSpace)*/ + tree.ToString());
tabSpace++;
foreach (var item in tree.Children)
{
GetBuilder(builder, item, ref tabSpace);
}
tabSpace--;
}
public static ushort GetID(this ChunkBase chunk)
{
ushort value;
if (chunk is UndefinedChunk)
{
value = (chunk as UndefinedChunk).ID;
}
else
{
Type type = chunk.GetType();
value = chunkTypeDict[type];//如果此处不存在此type的key，说明static构造函数需要添加此类型的字典信息。
}
return(value);
}
private TreeNode BuildTreeNode(ChunkBase chunk)
{
TreeNode node = new TreeNode(chunk.ToString());
node.Tag = chunk;
node.ToolTipText = chunk.ToString();
if (chunk.Length != chunk.BytesRead)
{
node.BackColor = Color.Red;
}
foreach (var item in chunk.Children)
{
var itemNode = BuildTreeNode(item);
node.Nodes.Add(itemNode);
}
return node;
}
private ChunkBase BuildSimpleTree(ChunkBase chunk)
{
var newChunk = ((ICloneable)chunk).Clone() as ChunkBase;
newChunk.Parent = null;
newChunk.Children = new List<ChunkBase>();
foreach (var item in chunk.Children)
{
if (item.GetType() != typeof(UndefinedChunk))
{
var newItem = BuildSimpleTree(item);
newItem.Parent = newChunk;
newChunk.Children.Add(newItem);
}
}
return newChunk;
}
private static string GetPreMarks(ChunkBase tree)
{
var parent = tree.Parent;
if (parent == null)
{
return(string.Empty);
}
List <bool> lstline = new List <bool>();
while (parent != null)
{
var pp = parent.Parent;
if (pp != null)
{
lstline.Add(pp.Children.IndexOf(parent) < pp.Children.Count - 1);
}
parent = pp;
}
StringBuilder builder = new StringBuilder();
for (int i = lstline.Count - 1; i >= 0; i--)
{
if (lstline[i])
{
builder.Append("│ ");
}
else
{
builder.Append(" ");
}
}
parent = tree.Parent;
if (parent.Children.IndexOf(tree) < parent.Children.Count - 1)
{
builder.Append("├─");
}
else
{
builder.Append("└─");
}
return(builder.ToString());
}
