/// <summary>
/// Opens an SVG document from the specified <see cref="Stream"/> and adds the specified entities.
/// </summary>
/// <param name="stream">The <see cref="Stream"/> containing the SVG document to open.</param>
/// <param name="entities">Custom entity definitions.</param>
/// <exception cref="ArgumentNullException">The <paramref name="stream"/> parameter cannot be <c>null</c>.</exception>
public static T Open <T>(Stream stream, Dictionary <string, string> entities) where T : SvgDocument, new()
{
if (stream == null)
{
throw new ArgumentNullException("stream");
}
// Don't close the stream via a dispose: that is the client's job.
var reader = new SvgTextReader(stream, entities);
reader.XmlResolver = new SvgDtdResolver();
reader.WhitespaceHandling = WhitespaceHandling.None;
return(Open <T>(reader));
}
/// <summary>
/// Attempts to create an SVG document from the specified string data.
/// </summary>
/// <param name="svg">The SVG data.</param>
public static T FromSvg <T>(string svg) where T : SvgDocument, new()
{
if (string.IsNullOrEmpty(svg))
{
throw new ArgumentNullException("svg");
}
using (var strReader = new System.IO.StringReader(svg)) {
var reader = new SvgTextReader(strReader, null);
reader.XmlResolver = new SvgDtdResolver();
reader.WhitespaceHandling = WhitespaceHandling.None;
return(Open <T>(reader));
}
}
/// <summary>
/// Opens an SVG document from the specified <see cref="Stream"/> and adds the specified entities.
/// </summary>
/// <param name="stream">The <see cref="Stream"/> containing the SVG document to open.</param>
/// <param name="entities">Custom entity definitions.</param>
/// <exception cref="ArgumentNullException">The <paramref name="stream"/> parameter cannot be <c>null</c>.</exception>
public static T Open <T>(Stream stream, Dictionary <string, string> entities) where T : SvgDocument, new()
{
if (stream == null)
{
throw new ArgumentNullException("stream");
}
// Don't close the stream via a dispose: that is the client's job.
var reader = new SvgTextReader(stream, entities)
{
XmlResolver = new SvgDtdResolver(),
WhitespaceHandling = WhitespaceHandling.Significant,
DtdProcessing = SvgDocument.DisableDtdProcessing ? DtdProcessing.Ignore : DtdProcessing.Parse,
};
return(Open <T>(reader));
}
/// <summary>
/// Attempts to create an SVG document from the specified string data.
/// </summary>
/// <param name="svg">The SVG data.</param>
public static T FromSvg <T>(string svg, bool ignoreStyles = false) where T : SvgDocument, new()
{
if (string.IsNullOrEmpty(svg))
{
throw new ArgumentNullException("svg");
}
using (var strReader = new System.IO.StringReader(svg))
{
var reader = new SvgTextReader(strReader, null)
{
XmlResolver = new SvgDtdResolver(),
WhitespaceHandling = WhitespaceHandling.None
};
return(Open <T>(reader, ignoreStyles: ignoreStyles));
}
}
/// <summary>
/// Attempts to create an SVG document from the specified string data.
/// </summary>
/// <param name="svg">The SVG data.</param>
public static T FromSvg <T>(string svg) where T : SvgDocument, new()
{
if (string.IsNullOrEmpty(svg))
{
throw new ArgumentNullException("svg");
}
using (var strReader = new System.IO.StringReader(svg))
{
var reader = new SvgTextReader(strReader, null)
{
XmlResolver = new SvgDtdResolver(),
WhitespaceHandling = WhitespaceHandling.Significant,
DtdProcessing = SvgDocument.DisableDtdProcessing ? DtdProcessing.Ignore : DtdProcessing.Parse,
};
return(Open <T>(reader));
}
}
/// <summary>
/// Opens an SVG document from the specified <see cref="Stream"/> and adds the specified entities.
/// </summary>
/// <param name="stream">The <see cref="Stream"/> containing the SVG document to open.</param>
/// <param name="entities">Custom entity definitions.</param>
/// <exception cref="ArgumentNullException">The <paramref name="stream"/> parameter cannot be <c>null</c>.</exception>
public static T Open <T>(Stream stream, Dictionary <string, string> entities) where T : SvgDocument, new()
{
if (stream == null)
{
throw new ArgumentNullException("stream");
}
//Trace.TraceInformation("Begin Read");
using (var reader = new SvgTextReader(stream, entities))
{
var elementStack = new Stack <SvgElement>();
var value = new StringBuilder();
bool elementEmpty;
SvgElement element = null;
SvgElement parent;
T svgDocument = null;
reader.XmlResolver = new SvgDtdResolver();
reader.WhitespaceHandling = WhitespaceHandling.None;
while (reader.Read())
{
try
{
switch (reader.NodeType)
{
case XmlNodeType.Element:
// Does this element have a value or children
// (Must do this check here before we progress to another node)
elementEmpty = reader.IsEmptyElement;
// Create element
if (elementStack.Count > 0)
{
element = SvgElementFactory.CreateElement(reader, svgDocument);
}
else
{
svgDocument = SvgElementFactory.CreateDocument <T>(reader);
element = svgDocument;
}
if (element == null)
{
continue;
}
// Add to the parents children
if (elementStack.Count > 0)
{
parent = elementStack.Peek();
parent.Children.Add(element);
}
// Push element into stack
elementStack.Push(element);
// Need to process if the element is empty
if (elementEmpty)
{
goto case XmlNodeType.EndElement;
}
break;
case XmlNodeType.EndElement:
// Skip if no element was created and is not the closing tag for the last
// known element
if (element == null && reader.LocalName != elementStack.Peek().ElementName)
{
continue;
}
// Pop the element out of the stack
element = elementStack.Pop();
if (value.Length > 0)
{
element.Content = value.ToString();
// Reset content value for new element
value = new StringBuilder();
}
break;
case XmlNodeType.CDATA:
case XmlNodeType.Text:
value.Append(reader.Value);
break;
}
}
catch (Exception exc)
{
Trace.TraceError(exc.Message);
}
}
//Trace.TraceInformation("End Read");
return(svgDocument);
}
}
/// <summary>
/// Given the SVG/XML fragment return a fully populated SVG node. The returned node is not added to the given document
/// </summary>
/// <param name="document">The document context to parse the in content in</param>
/// <param name="fragment">The SVG/XML formatted string to parse</param>
/// <param name="entities">Optional dictionary to resolve entities. May be null.</param>
/// <returns></returns>
public SvgElement[] ParseFragment(SvgDocument document, string fragment, Dictionary <string, string> entities)
{
NameTable nt = new NameTable();
XmlNamespaceManager nsmgr = new XmlNamespaceManager(nt);
nsmgr.AddNamespace("svg", svgNS);
XmlParserContext context = new XmlParserContext(null, nsmgr, null, XmlSpace.None);
using (var reader = new SvgTextReader(fragment, XmlNodeType.Element, context, entities))
{
var elements = new List <SvgElement>();
var elementStack = new Stack <SvgElement>();
var value = new StringBuilder();
bool elementEmpty;
SvgElement element = null;
while (reader.Read())
{
switch (reader.NodeType)
{
case XmlNodeType.Element:
// Does this element have a value or children
// (Must do this check here before we progress to another node)
elementEmpty = reader.IsEmptyElement;
// Create element
element = CreateElement(reader, document);
// Add to the parents children
if (elementStack.Count > 0)
{
var parent = elementStack.Peek();
if (parent != null && element != null)
{
parent.Children.Add(element);
}
}
else
{
elements.Add(element);
}
// Push element into stack
elementStack.Push(element);
// Need to process if the element is empty
if (elementEmpty)
{
goto case XmlNodeType.EndElement;
}
break;
case XmlNodeType.EndElement:
// Pop the element out of the stack
element = elementStack.Pop();
if (value.Length > 0 && element != null)
{
element.Content = value.ToString();
// Reset content value for new element
value.Clear();
}
break;
case XmlNodeType.CDATA:
case XmlNodeType.Text:
value.Append(reader.Value);
break;
}
}
return(elements.ToArray());
}
}