protected virtual void OnLinetypeSegmentAddedEvent(LinetypeSegment item)
{
LinetypeSegmentAddedEventHandler ae = this.LinetypeSegmentAdded;
if (ae != null)
{
ae(this, new LinetypeSegmentChangeEventArgs(item));
}
}
/// <summary>
/// Creates a new line type from the definition in a LIN file.
/// </summary>
/// <param name="file">Lin file where the definition is located.</param>
/// <param name="linetypeName">Name of the line type definition to read (ignore case).</param>
/// <returns>The linetype defined in the LIN file with the specified name, null if the linetype has not been found in the linetype definitions file.</returns>
public static Linetype Load(string file, string linetypeName)
{
Linetype linetype = null;
List <LinetypeSegment> segments = new List <LinetypeSegment>();
using (StreamReader reader = new StreamReader(File.Open(file, FileMode.Open, FileAccess.Read, FileShare.ReadWrite), true))
{
while (!reader.EndOfStream)
{
string line = reader.ReadLine();
if (line == null)
{
throw new FileLoadException("Unknown error reading LIN file.", file);
}
// lines starting with semicolons are comments
if (line.StartsWith(";"))
{
continue;
}
// every line type definition starts with '*'
if (!line.StartsWith("*"))
{
continue;
}
// reading line type name and description
int endName = line.IndexOf(','); // the first semicolon divides the name from the description that might contain more semicolons
string name = line.Substring(1, endName - 1);
string description = line.Substring(endName + 1, line.Length - endName - 1);
// remove start and end spaces
description = description.Trim();
if (name.Equals(linetypeName, StringComparison.OrdinalIgnoreCase))
{
// we have found the line type name, the next line of the file contains the line type definition
line = reader.ReadLine();
if (line == null)
{
throw new FileLoadException("Unknown error reading LIN file.", file);
}
string[] tokens = line.Split(',');
// the index 0 is always A (alignment field)
for (int i = 1; i < tokens.Length; i++)
{
double length;
if (double.TryParse(tokens[i], out length))
{
// is the length followed by a shape o text segment
if (i + 1 < tokens.Length)
{
if (tokens[i + 1].StartsWith("[", StringComparison.CurrentCultureIgnoreCase))
{
StringBuilder data = new StringBuilder();
// there are two kinds of complex linetype Text and Shape,
// the data is enclosed in brackets
bool end = false;
while (!end)
{
data.Append(tokens[++i]);
data.Append(",");
if (i >= tokens.Length)
{
return(null); // text and shape data must be enclosed by brackets
}
if (tokens[i].EndsWith("]"))
{
data.Append(tokens[i]);
end = true;
}
}
LinetypeSegment segment = ReadLineTypeComplexSegment(data.ToString(), length);
if (segment != null)
{
segments.Add(segment);
}
}
else
{
segments.Add(new LinetypeSimpleSegment(length));
}
}
else
{
segments.Add(new LinetypeSimpleSegment(length));
}
}
else
{
throw new FormatException("The linetype definition is not well formatted.");
}
}
linetype = new Linetype(name, segments, description);
break;
}
}
}
return(linetype);
}
/// <summary>
/// Creates a new line type from the definition in a LIN file.
/// </summary>
/// <param name="file">Lin file where the definition is located.</param>
/// <param name="linetypeName">Name of the line type definition to read (ignore case).</param>
/// <returns>The linetype defined in the LIN file with the specified name, null if the linetype has not been found in the linetype definitions file.</returns>
public static Linetype Load(string file, string linetypeName)
{
if (string.IsNullOrEmpty(file))
{
throw new ArgumentNullException(nameof(file));
}
if (!string.Equals(Path.GetExtension(file), ".LIN", StringComparison.InvariantCultureIgnoreCase))
{
throw new ArgumentException("The linetype definitions file must have the extension LIN.", nameof(file));
}
if (string.IsNullOrEmpty(linetypeName))
{
return(null);
}
Linetype linetype = null;
List <LinetypeSegment> segments = new List <LinetypeSegment>();
using (StreamReader reader = new StreamReader(File.Open(file, FileMode.Open, FileAccess.Read, FileShare.ReadWrite), true))
{
while (!reader.EndOfStream)
{
string line = reader.ReadLine();
if (line == null)
{
throw new FileLoadException("Unknown error reading LIN file.", file);
}
// every line type definition starts with '*'
if (!line.StartsWith("*"))
{
continue;
}
// reading line type name and description
int endName = line.IndexOf(','); // the first comma divides the name from the description that might contain more commas
string name = line.Substring(1, endName - 1);
string description = line.Substring(endName + 1, line.Length - endName - 1);
// remove start and end spaces
description = description.Trim();
if (name.Equals(linetypeName, StringComparison.OrdinalIgnoreCase))
{
// we have found the line type name, the next line of the file contains the line type definition
line = reader.ReadLine();
if (line == null)
{
throw new FileLoadException("Unknown error reading LIN file.", file);
}
string[] tokens = System.Text.RegularExpressions.Regex.Split(line, ",(?=(?:[^\"]*\"[^\"]*\")*[^\"]*$)");
// the index 0 is always A (alignment field)
for (int i = 1; i < tokens.Length; i++)
{
double length;
if (double.TryParse(tokens[i], NumberStyles.Float, CultureInfo.InvariantCulture, out length))
{
// is the length followed by a shape or text segment
if (i + 1 < tokens.Length)
{
if (tokens[i + 1].StartsWith("["))
{
List <string> data = new List <string>();
// there are two kinds of complex linetype Text and Shape, the data is enclosed in brackets
for (++i; i < tokens.Length; i++)
{
data.Add(tokens[i]);
// text and shape data must be enclosed by brackets
if (i >= tokens.Length)
{
throw new FormatException("The linetype definition is not well formatted.");
}
if (tokens[i].EndsWith("]"))
{
break;
}
}
LinetypeSegment segment = ReadLineTypeComplexSegment(data.ToArray(), length);
if (segment != null)
{
segments.Add(segment);
}
}
else
{
segments.Add(new LinetypeSimpleSegment(length));
}
}
else
{
segments.Add(new LinetypeSimpleSegment(length));
}
}
else
{
throw new FormatException("The linetype definition is not well formatted.");
}
}
linetype = new Linetype(name, segments, description);
break;
}
}
}
return(linetype);
}
/// <summary>
/// Initializes a new instance of <c>LinetypeSegmentChangeEventArgs</c>.
/// </summary>
/// <param name="item">The item that is being added or removed from the line type segment list.</param>
public LinetypeSegmentChangeEventArgs(LinetypeSegment item)
{
this.item = item;
}
