/// <summary>
/// It creates a new empty SVG document that contains just the root element.
/// If a current document exists, it is destroyed.
/// </summary>
/// <returns>
/// The root element of the SVG document.
/// </returns>
public SvgRoot CreateNewDocument()
{
if (m_root != null)
{
m_root = null;
m_nNextId = 1;
m_elements.Clear();
}
m_root = new SvgRoot(this);
m_root.setInternalId(m_nNextId++);
m_elements.Add(m_root.getInternalId(), m_root);
m_sXmlDeclaration = "<?xml version=\"1.0\"?>";
m_sXmlDocType = "<!DOCTYPE svg PUBLIC \"-//W3C//DTD SVG 1.1//EN\" \"http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd\">";
m_root.SetAttributeValue(SvgAttribute._SvgAttribute.attrSvg_XmlNs, "http://www.w3.org/2000/svg");
m_root.SetAttributeValue(SvgAttribute._SvgAttribute.attrSvg_Version, "1.1");
return(m_root);
}
/// <summary>
/// It creates a SVG document reading from a file.
/// If a current document exists, it is destroyed.
/// </summary>
/// <param name="sFilename">The complete path of a valid SVG file.</param>
/// <returns>
/// true if the file is loaded successfully and it is a valid SVG document, false if the file cannot be open or if it is not
/// a valid SVG document.
/// </returns>
public bool LoadFromFile(string sFilename)
{
ErrH err = new ErrH("SvgDoc", "LoadFromFile");
err.LogParameter("sFilename", sFilename);
if (m_root != null)
{
m_root = null;
m_nNextId = 1;
m_elements.Clear();
}
bool bResult = true;
try
{
XmlTextReader reader;
reader = new XmlTextReader(sFilename);
reader.WhitespaceHandling = WhitespaceHandling.None;
reader.Normalization = false;
reader.XmlResolver = null;
reader.Namespaces = false;
string tmp;
SvgElement eleParent = null;
try
{
// parse the file and display each of the nodes.
while (reader.Read() && bResult)
{
switch (reader.NodeType)
{
case XmlNodeType.Attribute:
tmp = reader.Name;
tmp = reader.Value;
break;
case XmlNodeType.Element:
{
SvgElement ele = AddElement(eleParent, reader.Name);
if (ele == null)
{
err.Log("Svg element cannot be added. Name: " + reader.Name, ErrH._LogPriority.Warning);
bResult = false;
}
else
{
eleParent = ele;
if (reader.IsEmptyElement)
{
if (eleParent != null)
{
eleParent = eleParent.getParent();
}
}
bool bLoop = reader.MoveToFirstAttribute();
while (bLoop)
{
ele.SetAttributeValue(reader.Name, reader.Value);
bLoop = reader.MoveToNextAttribute();
}
}
}
break;
case XmlNodeType.Text:
if (eleParent != null)
{
eleParent.setElementValue(reader.Value);
}
break;
case XmlNodeType.CDATA:
err.Log("Unexpected item: " + reader.Value, ErrH._LogPriority.Warning);
break;
case XmlNodeType.ProcessingInstruction:
err.Log("Unexpected item: " + reader.Value, ErrH._LogPriority.Warning);
break;
case XmlNodeType.Comment:
err.Log("Unexpected item: " + reader.Value, ErrH._LogPriority.Warning);
break;
case XmlNodeType.XmlDeclaration:
m_sXmlDeclaration = "<?xml " + reader.Value + "?>";
break;
case XmlNodeType.Document:
err.Log("Unexpected item: " + reader.Value, ErrH._LogPriority.Warning);
break;
case XmlNodeType.DocumentType:
{
string sDTD1;
string sDTD2;
sDTD1 = reader.GetAttribute("PUBLIC");
sDTD2 = reader.GetAttribute("SYSTEM");
m_sXmlDocType = "<!DOCTYPE svg PUBLIC \"" + sDTD1 + "\" \"" + sDTD2 + "\">";
}
break;
case XmlNodeType.EntityReference:
err.Log("Unexpected item: " + reader.Value, ErrH._LogPriority.Warning);
break;
case XmlNodeType.EndElement:
if (eleParent != null)
{
eleParent = eleParent.getParent();
}
break;
} // switch
} // while
} // read try
catch (XmlException xmle)
{
err.LogException(xmle);
err.LogParameter("Line Number", xmle.LineNumber.ToString());
err.LogParameter("Line Position", xmle.LinePosition.ToString());
bResult = false;
}
catch (Exception e)
{
err.LogException(e);
bResult = false;
}
finally
{
reader.Close();
}
}
catch
{
err.LogUnhandledException();
bResult = false;
}
err.LogEnd(bResult);
return(bResult);
}
// ---------- PRIVATE PROPERTIES END
// ---------- PUBLIC METHODS
/// <summary>
/// Constructor.
/// </summary>
public SvgDoc()
{
m_root = null;
m_nNextId = 1;
m_elements = 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="sName">SVG element name.</param>
/// <returns>The new created element.</returns>
public SvgElement AddElement(SvgElement parent, string sName)
{
SvgElement eleToReturn = null;
if (sName == "svg")
{
m_root = new SvgRoot(this);
m_root.setInternalId(m_nNextId++);
m_elements.Add(m_root.getInternalId(), m_root);
eleToReturn = m_root;
}
else if (sName == "desc")
{
eleToReturn = AddDesc(parent);
}
else if (sName == "text")
{
eleToReturn = AddText(parent);
}
else if (sName == "g")
{
eleToReturn = AddGroup(parent);
}
else if (sName == "rect")
{
eleToReturn = AddRect(parent);
}
else if (sName == "circle")
{
eleToReturn = AddCircle(parent);
}
else if (sName == "ellipse")
{
eleToReturn = AddEllipse(parent);
}
else if (sName == "line")
{
eleToReturn = AddLine(parent);
}
else if (sName == "path")
{
eleToReturn = AddPath(parent);
}
else if (sName == "polygon")
{
eleToReturn = AddPolygon(parent);
}
else if (sName == "image")
{
eleToReturn = AddImage(parent);
}
else
{
if (parent != null)
{
eleToReturn = AddUnsupported(parent, sName);
}
}
return(eleToReturn);
}