/// <summary>
/// Creates a new/empty SVG document that contains just the root element.
/// </summary>
/// <returns>
/// The root element of the SVG document.
/// </returns>
public SvgRoot CreateNewDocument()
{
if (svgRoot != null)
{
svgRoot = null;
svgDocumentNextInternalId = 1;
svgDocumentElements.Clear();
}
svgRoot = new SvgRoot(this);
svgRoot.SetInternalId(svgDocumentNextInternalId++);
svgDocumentElements.Add(svgRoot.GetInternalId(), svgRoot);
svgDocumentXmlDeclaration = "<?xml version=\"1.0\"?>";
svgDocumentXmlDocumentType = "<!DOCTYPE svg PUBLIC \"-//W3C//DTD SVG 1.1//EN\" \"http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd\">";
svgRoot.SetAttributeValue(SvgAttribute.SvgAttributes.AttrSvgXmlNs, "http://www.w3.org/2000/svg");
svgRoot.SetAttributeValue(SvgAttribute.SvgAttributes.AttrSvgVersion, "1.1");
return(svgRoot);
}
/// <summary>
/// Load SVG document from a file.
/// </summary>
/// <param name="filename">The complete path of a valid SVG file.</param>
/// <returns>
/// True - the file is loaded successfully and it is a valid SVG document
/// False - the file cannot be opened or it is not a valid SVG document.
/// </returns>
public bool LoadFromFile(string filename)
{
if ( svgRoot != null )
{
svgRoot = null;
svgDocumentNextInternalId = 1;
svgDocumentElements.Clear();
}
var result = true;
try
{
var reader = new XmlTextReader(filename)
{
WhitespaceHandling = WhitespaceHandling.None,
Normalization = false,
XmlResolver = null,
Namespaces = false
};
SvgElement parentElement = null;
try
{
// parse the file and display each of the nodes.
while ( reader.Read() && result )
{
switch (reader.NodeType)
{
case XmlNodeType.Attribute:
break;
case XmlNodeType.Element:
var element = AddElement(parentElement, reader.Name);
if ( element != null )
{
parentElement = element;
if (reader.IsEmptyElement)
{
if ( parentElement != null )
{
parentElement = parentElement.GetParent();
}
}
var attribute = reader.MoveToFirstAttribute();
while (attribute)
{
element.SetAttributeValue(reader.Name, reader.Value);
attribute = reader.MoveToNextAttribute();
}
}
break;
case XmlNodeType.Text:
if ( parentElement != null )
{
parentElement.SetElementValue(reader.Value);
}
break;
case XmlNodeType.CDATA:
break;
case XmlNodeType.ProcessingInstruction:
break;
case XmlNodeType.Comment:
break;
case XmlNodeType.XmlDeclaration:
svgDocumentXmlDeclaration = "<?xml " + reader.Value + "?>";
break;
case XmlNodeType.Document:
break;
case XmlNodeType.DocumentType:
{
var sDtd1 = reader.GetAttribute("PUBLIC");
var sDtd2 = reader.GetAttribute("SYSTEM");
svgDocumentXmlDocumentType = "<!DOCTYPE svg PUBLIC \"" + sDtd1 + "\" \"" + sDtd2 + "\">";
}
break;
case XmlNodeType.EntityReference:
break;
case XmlNodeType.EndElement:
if ( parentElement != null )
{
parentElement = parentElement.GetParent();
}
break;
} // switch
} // while
} // read try
catch(XmlException xmle)
{
ErrorMessage =
$"{xmle.Message}\r\nLine Number: {xmle.LineNumber.ToString()}\r\nLine Position: {xmle.LinePosition.ToString()}";
result = false;
}
catch(Exception e)
{
ErrorMessage = e.Message;
result = false;
}
finally
{
reader.Close();
}
}
catch
{
ErrorMessage = "Unhandled Exception";
result = false;
}
return result;
}
/// <summary>
/// Creates a new/empty SVG document that contains just the root element.
/// </summary>
/// <returns>
/// The root element of the SVG document.
/// </returns>
public SvgRoot CreateNewDocument()
{
if ( svgRoot != null )
{
svgRoot = null;
svgDocumentNextInternalId = 1;
svgDocumentElements.Clear();
}
svgRoot = new SvgRoot(this);
svgRoot.SetInternalId(svgDocumentNextInternalId++);
svgDocumentElements.Add(svgRoot.GetInternalId(), svgRoot);
svgDocumentXmlDeclaration = "<?xml version=\"1.0\"?>";
svgDocumentXmlDocumentType = "<!DOCTYPE svg PUBLIC \"-//W3C//DTD SVG 1.1//EN\" \"http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd\">";
svgRoot.SetAttributeValue(SvgAttribute.SvgAttributes.AttrSvgXmlNs, "http://www.w3.org/2000/svg");
svgRoot.SetAttributeValue(SvgAttribute.SvgAttributes.AttrSvgVersion, "1.1");
return svgRoot;
}
public SvgDocument()
{
svgRoot = null;
svgDocumentNextInternalId = 1;
svgDocumentElements = new Hashtable();
}
/// <summary>
/// It creates a new element according to the element name provided
/// and it adds the new element as the last children of the given parent element.
/// </summary>
/// <param name="parent">Parent element. If null the element is added under the root.</param>
/// <param name="name">SVG element name.</param>
/// <returns>The new created element.</returns>
public SvgElement AddElement(SvgElement parent, string name)
{
SvgElement eleToReturn = null;
if ( name == "svg" )
{
svgRoot = new SvgRoot(this);
svgRoot.SetInternalId(svgDocumentNextInternalId++);
svgDocumentElements.Add(svgRoot.GetInternalId(), svgRoot);
eleToReturn = svgRoot;
}
else if ( name == "desc" )
{
eleToReturn = AddDesc(parent);
}
else if ( name == "text" )
{
eleToReturn = AddText(parent);
}
else if ( name == "g" )
{
eleToReturn = AddGroup(parent);
}
else if ( name == "rect" )
{
eleToReturn = AddRect(parent);
}
else if ( name == "circle" )
{
eleToReturn = AddCircle(parent);
}
else if ( name == "ellipse" )
{
eleToReturn = AddEllipse(parent);
}
else if ( name == "line" )
{
eleToReturn = AddLine(parent);
}
else if ( name == "path" )
{
eleToReturn = AddPath(parent);
}
else if ( name == "polygon" )
{
eleToReturn = AddPolygon(parent);
}
else if ( name == "image" )
{
eleToReturn = AddImage(parent);
}
else
{
if ( parent != null )
{
eleToReturn = AddUnsupported(parent, name);
}
}
return eleToReturn;
}
/// <summary>
/// Load SVG document from a file.
/// </summary>
/// <param name="filename">The complete path of a valid SVG file.</param>
/// <returns>
/// True - the file is loaded successfully and it is a valid SVG document
/// False - the file cannot be opened or it is not a valid SVG document.
/// </returns>
public bool LoadFromFile(string filename)
{
if (svgRoot != null)
{
svgRoot = null;
svgDocumentNextInternalId = 1;
svgDocumentElements.Clear();
}
var result = true;
try
{
var reader = new XmlTextReader(filename)
{
WhitespaceHandling = WhitespaceHandling.None,
Normalization = false,
XmlResolver = null,
Namespaces = false
};
SvgElement parentElement = null;
try
{
// parse the file and display each of the nodes.
while (reader.Read() && result)
{
switch (reader.NodeType)
{
case XmlNodeType.Attribute:
break;
case XmlNodeType.Element:
var element = AddElement(parentElement, reader.Name);
if (element != null)
{
parentElement = element;
if (reader.IsEmptyElement)
{
if (parentElement != null)
{
parentElement = parentElement.GetParent();
}
}
var attribute = reader.MoveToFirstAttribute();
while (attribute)
{
element.SetAttributeValue(reader.Name, reader.Value);
attribute = reader.MoveToNextAttribute();
}
}
break;
case XmlNodeType.Text:
if (parentElement != null)
{
parentElement.SetElementValue(reader.Value);
}
break;
case XmlNodeType.CDATA:
break;
case XmlNodeType.ProcessingInstruction:
break;
case XmlNodeType.Comment:
break;
case XmlNodeType.XmlDeclaration:
svgDocumentXmlDeclaration = "<?xml " + reader.Value + "?>";
break;
case XmlNodeType.Document:
break;
case XmlNodeType.DocumentType:
{
var sDtd1 = reader.GetAttribute("PUBLIC");
var sDtd2 = reader.GetAttribute("SYSTEM");
svgDocumentXmlDocumentType = "<!DOCTYPE svg PUBLIC \"" + sDtd1 + "\" \"" + sDtd2 + "\">";
}
break;
case XmlNodeType.EntityReference:
break;
case XmlNodeType.EndElement:
if (parentElement != null)
{
parentElement = parentElement.GetParent();
}
break;
} // switch
} // while
} // read try
catch (XmlException xmle)
{
ErrorMessage =
$"{xmle.Message}\r\nLine Number: {xmle.LineNumber.ToString()}\r\nLine Position: {xmle.LinePosition.ToString()}";
result = false;
}
catch (Exception e)
{
ErrorMessage = e.Message;
result = false;
}
finally
{
reader.Close();
}
}
catch
{
ErrorMessage = "Unhandled Exception";
result = false;
}
return(result);
}
/// <summary>
/// It creates a new element according to the element name provided
/// and it adds the new element as the last children of the given parent element.
/// </summary>
/// <param name="parent">Parent element. If null the element is added under the root.</param>
/// <param name="name">SVG element name.</param>
/// <returns>The new created element.</returns>
public SvgElement AddElement(SvgElement parent, string name)
{
SvgElement eleToReturn = null;
if (name == "svg")
{
svgRoot = new SvgRoot(this);
svgRoot.SetInternalId(svgDocumentNextInternalId++);
svgDocumentElements.Add(svgRoot.GetInternalId(), svgRoot);
eleToReturn = svgRoot;
}
else if (name == "desc")
{
eleToReturn = AddDesc(parent);
}
else if (name == "text")
{
eleToReturn = AddText(parent);
}
else if (name == "g")
{
eleToReturn = AddGroup(parent);
}
else if (name == "rect")
{
eleToReturn = AddRect(parent);
}
else if (name == "circle")
{
eleToReturn = AddCircle(parent);
}
else if (name == "ellipse")
{
eleToReturn = AddEllipse(parent);
}
else if (name == "line")
{
eleToReturn = AddLine(parent);
}
else if (name == "path")
{
eleToReturn = AddPath(parent);
}
else if (name == "polygon")
{
eleToReturn = AddPolygon(parent);
}
else if (name == "image")
{
eleToReturn = AddImage(parent);
}
else
{
if (parent != null)
{
eleToReturn = AddUnsupported(parent, name);
}
}
return(eleToReturn);
}
public SvgDocument()
{
svgRoot = null;
svgDocumentNextInternalId = 1;
svgDocumentElements = new Hashtable();
}