private static LayerState Read(Stream stream)
{
if (stream == null)
{
throw new ArgumentNullException(nameof(stream));
}
TextCodeValueReader chunk = new TextCodeValueReader(new StreamReader(stream, Encoding.UTF8, true));
chunk.Next();
if (chunk.Code == 0)
{
if (chunk.ReadString() != LayerStateDictionary)
{
throw new Exception("File not valid.");
}
}
else
{
throw new Exception("File not valid.");
}
chunk.Next();
return(ReadLayerState(chunk));
}
private static LayerStateProperties ReadLayerProperties(TextCodeValueReader chunk)
{
LayerPropertiesFlags flags = LayerPropertiesFlags.Plot;
string lineType = String.Empty;
//string plotStyle = string.Empty;
AciColor color = AciColor.Default;
Lineweight lineweight = Lineweight.Default;
Transparency transparency = new Transparency(0);
string name = chunk.ReadString();
chunk.Next();
while (chunk.Code != 8 && chunk.Code != 0)
{
switch (chunk.Code)
{
case 90:
flags = (LayerPropertiesFlags)chunk.ReadInt();
chunk.Next();
break;
case 62:
color = AciColor.FromCadIndex(chunk.ReadShort());
chunk.Next();
break;
case 370:
lineweight = (Lineweight)chunk.ReadShort();
chunk.Next();
break;
case 6:
lineType = chunk.ReadString();
chunk.Next();
break;
case 2:
//plotStyle = chunk.ReadString();
chunk.Next();
break;
case 440:
int alpha = chunk.ReadInt();
transparency = alpha == 0 ? new Transparency(0) : Transparency.FromAlphaValue(alpha);
chunk.Next();
break;
case 92:
color = AciColor.FromTrueColor(chunk.ReadInt());
chunk.Next();
break;
default:
chunk.Next();
break;
}
}
if (string.IsNullOrEmpty(name))
{
return(null);
}
LayerStateProperties properties = new LayerStateProperties(name)
{
Flags = flags,
Color = color,
Lineweight = lineweight,
LinetypeName = lineType,
//PlotStyleName = plotStyle,
Transparency = transparency
};
return(properties);
}
private static LayerState ReadLayerState(TextCodeValueReader chunk)
{
string name = string.Empty;
string description = string.Empty;
string currentLayer = Layer.DefaultName;
bool paperSpace = false;
List <LayerStateProperties> layerProperties = new List <LayerStateProperties>();
if (chunk.Code == 0)
{
if (chunk.ReadString() != LayerStateName)
{
throw new Exception("File not valid.");
}
}
else
{
throw new Exception("File not valid.");
}
chunk.Next();
while (chunk.Code != 0)
{
switch (chunk.Code)
{
case 1:
name = chunk.ReadString();
chunk.Next();
break;
case 91: // unknown code
chunk.Next();
break;
case 301:
description = chunk.ReadString();
chunk.Next();
break;
case 290:
paperSpace = chunk.ReadBool();
chunk.Next();
break;
case 302: // active layer
currentLayer = chunk.ReadString();
chunk.Next();
break;
case 8: // begin reading layer properties
layerProperties.Add(ReadLayerProperties(chunk));
break;
default:
chunk.Next();
break;
}
}
LayerState states = new LayerState(name)
{
Description = description,
CurrentLayer = currentLayer,
PaperSpace = paperSpace
};
foreach (LayerStateProperties lp in layerProperties)
{
if (!states.Properties.ContainsKey(lp.Name))
{
states.Properties.Add(lp.Name, lp);
}
}
return(states);
}
