private bool DeleteElement(SVGUnit ele, bool bDeleteFromParent)
{
SVGErr err = new SVGErr("SvgDoc", "DeleteElement");
if (ele == null)
{
err.LogEnd(false);
return(false);
}
SVGUnit parent = ele.getParent();
if (parent == null)
{
err.Log("root node cannot be delete!", SVGErr._LogPriority.Info);
err.LogEnd(false);
return(false);
}
if (ele.getPrevious() != null)
{
ele.getPrevious().setNext(ele.getNext());
}
if (ele.getNext() != null)
{
ele.getNext().setPrevious(ele.getPrevious());
}
if (bDeleteFromParent)
{
if (IsFirstChild(ele))
{
ele.getParent().setChild(ele.getNext());
}
}
SVGUnit child = ele.getChild();
while (child != null)
{
DeleteElement(child, false);
child = child.getNext();
}
m_elements.Remove(ele.getInternalId());
err.Log(ele.ElementInfo(), SVGErr._LogPriority.Info);
err.LogEnd(true);
return(true);
}
/// <summary>
/// 它创建了一个新的元素，从eletoclone复制所有属性；新的
/// 元素插入到提供的父元素下。
/// </summary>
public SVGUnit CloneElement(SVGUnit parent, SVGUnit eleToClone, SVGUnit last)
{
string sOldId = eleToClone.GetAttributeStringValue(SVGAttribute._SvgAttribute.attrCore_Id);
string sNewId = sOldId;
if (sOldId != "")
{
int i = 1;
while (GetSvgElement(sNewId) != null)
{
sNewId = sOldId + "_" + i.ToString();
i++;
}
}
SVGUnit eleNew = AddElement(parent, eleToClone.getElementName(), ref last);
eleNew.CloneAttributeList(eleToClone);
if (sNewId != "")
{
eleNew.SetAttributeValue(SVGAttribute._SvgAttribute.attrCore_Id, sNewId);
}
if (eleToClone.getChild() != null)
{
eleNew.setChild(CloneElement(eleNew, eleToClone.getChild(), last));
if (eleToClone.getChild().getNext() != null)
{
eleNew.getChild().setNext(CloneElement(eleNew, eleToClone.getChild().getNext(), last));
}
}
return(eleNew);
}
/// <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);
}
/// <summary>
/// 根据读取的xml生成项目
/// </summary>
/// <param name="svg"></param>
public static void CreateProjectFromXML(SVGUnit svg, DrawObjectList list)
{
while (svg != null)
{
switch (svg.getElementType())
{
case SVGUnit.SVGUnitType.def: //将所有symbol读取
SVGUnit defchild = svg.getChild();
while (defchild != null)
{
if (defchild.getElementType() == SVGUnit.SVGUnitType.symbol)
{
CreateSysmbolUnit(defchild as SVGSymbol);
}
defchild = defchild.getNext();
}
break;
case SVGUnit.SVGUnitType.typeGroup:
if (svg.Id == SVGDefine.ConnectLineClass)
{
SVGGroup group = svg.getChild() as SVGGroup;
DrawConnectObject drawConnectObject = DrawConnectObject.Create(group.getChild() as SVGPath);
SVGCN_Ref svgcnRef = group.getChild().getNext().getChild() as SVGCN_Ref;
var linkDnd = svgcnRef.LinkObjecttlDnd.Split('@');
drawConnectObject.SetConnectDeviceFromXml(linkDnd[0], 1, int.Parse(linkDnd[1]), list.GetDeviceList());
linkDnd = svgcnRef.LinkObjectIDznd.Split('@');
drawConnectObject.SetConnectDeviceFromXml(linkDnd[0], 2, int.Parse(linkDnd[1]), list.GetDeviceList());
drawConnectObject.Id = int.Parse(group.Id);
list.Add(drawConnectObject);
group = group.getNext() as SVGGroup;
}
else if (svg.Id == SVGDefine.AnimationClass)
{
}
else
{
SVGGroup group = svg.getChild() as SVGGroup;
while (group != null)
{
var gchild = group.getChild();
switch (gchild.getElementType())
{
case SVGUnit.SVGUnitType.use:
SVGUse use = gchild as SVGUse;
var gDevice = CreateDeviceDrawObjectBase(use, group.Id); //TODO 后期添加到工作组中
list.Add(gDevice);
break;
default:
//TODO 未编排为设备的图素集合，暂时用临时分组表示
var o = SVGDrawFactory.CreateDrawObject(svg);
list.Add(o);
//vBase = new DeviceDrawObjectBase(0f, 0f, 0f, 0f, group.Id, drawObjects, null, "");
break;
}
group = group.getNext() as SVGGroup; //获取下一个
}
}
break;
default: break;
}
svg = svg.getNext();
}
}