/// <summary>
/// 它创建一个从文件读取的SVG文档。
/// 如果当前文档存在，则会将其销毁。
/// </summary>
public bool LoadFromFile(XmlReader reader)
{
SVGErr err = new SVGErr("SvgDoc", "LoadFromFile");
err.LogParameter("sFilename", reader.BaseURI);
if (m_root != null)
{
m_root = null;
m_nNextId = 1;
m_elements.Clear();
}
bool bResult = true;
try
{
string tmp;
SVGUnit eleParent = null;
SVGUnit eleLast = null;
try
{
// 分析文件并显示每个节点。
while (reader.Read() && bResult)
{
switch (reader.NodeType)
{
case XmlNodeType.Attribute:
tmp = reader.Name;
tmp = reader.Value;
break;
case XmlNodeType.Element: //找到一个标签
{
SVGUnit ele = AddElement(eleParent, reader.Name, ref eleLast);
if (ele == null)
{
err.Log("Svg element cannot be added. Name: " + reader.Name,
SVGErr._LogPriority.Warning);
bResult = false;
}
else
{
eleParent = ele;
if (reader.IsEmptyElement)
{
if (eleParent != null)
{
eleParent = eleParent.getParent();
}
}
bool bLoop = reader.MoveToFirstAttribute();
while (bLoop) //直到读完属性为止
{
if (!ele.SetAttributeValue(reader.Name, reader.Value))
{
err.Log("Read AttributeValue : " + reader.Value, SVGErr._LogPriority.Warning);
}
bLoop = reader.MoveToNextAttribute();
}
}
}
break;
case XmlNodeType.Text:
if (eleParent != null)
{
eleParent.setElementValue(reader.Value);
}
break;
case XmlNodeType.CDATA:
err.Log("Unexpected item: " + reader.Value, SVGErr._LogPriority.Warning);
break;
case XmlNodeType.ProcessingInstruction:
err.Log("Unexpected item: " + reader.Value, SVGErr._LogPriority.Warning);
break;
case XmlNodeType.Comment:
err.Log("Unexpected item: " + reader.Value, SVGErr._LogPriority.Warning);
break;
case XmlNodeType.XmlDeclaration:
m_sXmlDeclaration = "<?xml " + reader.Value + "?>";
break;
case XmlNodeType.Document:
err.Log("Unexpected item: " + reader.Value, SVGErr._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, SVGErr._LogPriority.Warning);
break;
case XmlNodeType.EndElement:
if (eleParent != null)
{
eleParent = eleParent.getParent();
eleLast = null;
if (eleParent != null)
{
var templast = eleParent.getChild();
while (templast != null)
{
eleLast = templast;
templast = templast.getNext();
}
}
}
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);
}