/// <summary>
/// It moves the element one level up in the tree hierarchy.
/// </summary>
/// <param name="ele">Element to be moved.</param>
/// <returns>
/// true if the operation succeeded.
/// </returns>
public bool ElementLevelUp(SvgElement ele)
{
ErrH err = new ErrH("SvgDoc", "ElementLevelUp");
err.Log("Element to move " + ele.ElementInfo(), ErrH._LogPriority.Info);
SvgElement parent = ele.getParent();
if (parent == null)
{
err.Log("Root node cannot be moved", ErrH._LogPriority.Info);
err.LogEnd(false);
return(false);
}
if (parent.getParent() == null)
{
err.Log("An element cannot be moved up to the root", ErrH._LogPriority.Info);
err.LogEnd(false);
return(false);
}
SvgElement nxt = ele.getNext();
// the first child of the parent became the next
parent.setChild(nxt);
if (nxt != null)
{
nxt.setPrevious(null);
}
// get the last sibling of the parent
SvgElement last = GetLastSibling(parent);
if (last != null)
{
last.setNext(ele);
}
ele.setParent(parent.getParent());
ele.setPrevious(last);
ele.setNext(null);
return(true);
}
/// <summary>
/// It creates a new element copying all attributes from eleToClone; the new
/// element is inserted under the parent element provided.
/// </summary>
/// <param name="parent">Parent element. If null the element is added under the root.</param>
/// <param name="eleToClone">Element to be cloned</param>
/// <returns></returns>
public SvgElement CloneElement(SvgElement parent, SvgElement eleToClone)
{
// calculate unique id
string sOldId = eleToClone.GetAttributeStringValue(SvgAttribute._SvgAttribute.attrCore_Id);
string sNewId = sOldId;
if (sOldId != "")
{
int i = 1;
// check if it is unique
while (GetSvgElement(sNewId) != null)
{
sNewId = sOldId + "_" + i.ToString();
i++;
}
}
// clone operation
SvgElement eleNew = AddElement(parent, eleToClone.getElementName());
eleNew.CloneAttributeList(eleToClone);
if (sNewId != "")
{
eleNew.SetAttributeValue(SvgAttribute._SvgAttribute.attrCore_Id, sNewId);
}
if (eleToClone.getChild() != null)
{
eleNew.setChild(CloneElement(eleNew, eleToClone.getChild()));
if (eleToClone.getChild().getNext() != null)
{
eleNew.getChild().setNext(CloneElement(eleNew, eleToClone.getChild().getNext()));
}
}
return(eleNew);
}
/// <summary>
/// It moves the element after its current next sibling.
/// </summary>
/// <param name="ele">Element to be moved.</param>
/// <returns>
/// true if the operation succeeded.
/// </returns>
public bool ElementPositionDown(SvgElement ele)
{
ErrH err = new ErrH("SvgDoc", "ElementPositionDown");
err.Log("Element to move " + ele.ElementInfo(), ErrH._LogPriority.Info);
SvgElement parent = ele.getParent();
if (parent == null)
{
err.Log("Root node cannot be moved", ErrH._LogPriority.Info);
err.LogEnd(false);
return(false);
}
if (IsLastSibling(ele))
{
err.Log("Element is already at the last sibling position", ErrH._LogPriority.Info);
err.LogEnd(false);
return(false);
}
SvgElement nxt = ele.getNext();
SvgElement nxt2 = null;
SvgElement prv = ele.getPrevious();
// fix Next
if (nxt != null)
{
nxt.setPrevious(ele.getPrevious());
nxt2 = nxt.getNext();
nxt.setNext(ele);
}
// fix Previous
if (prv != null)
{
prv.setNext(nxt);
}
// fix Element
if (IsFirstChild(ele))
{
parent.setChild(nxt);
}
ele.setPrevious(nxt);
ele.setNext(nxt2);
if (nxt2 != null)
{
nxt2.setPrevious(ele);
}
err.Log("Element moved " + ele.ElementInfo(), ErrH._LogPriority.Info);
err.LogEnd(true);
return(true);
}