/// <summary>
/// It returns a string containing current element info for logging purposes.
/// </summary>
/// <returns></returns>
public string ElementInfo()
{
var sMsg = "InternalId:" + InternalId.ToString();
if (ParentElement != null)
{
sMsg += " - Parent:" + ParentElement.GetInternalId().ToString();
}
if (PreviousElement != null)
{
sMsg += " - Previous:" + PreviousElement.GetInternalId().ToString();
}
if (NextElement != null)
{
sMsg += " - Next:" + NextElement.GetInternalId().ToString();
}
if (ChildElement != null)
{
sMsg += " - Child:" + ChildElement.GetInternalId().ToString();
}
return(sMsg);
}
private bool DeleteElement(SvgElement element, bool deleteFromParent)
{
if (element == null)
{
return(false);
}
var parent = element.GetParent();
if (parent == null)
{
// root node cannot be delete!
ErrorMessage = "root node cannot be delete!";
return(false);
}
// set the Next reference of the previous
if (element.GetPrevious() != null)
{
element.GetPrevious().SetNext(element.GetNext());
}
// set the Previous reference of the next
if (element.GetNext() != null)
{
element.GetNext().SetPrevious(element.GetPrevious());
}
// check if the element is the first child
// the deleteFromParent flag is used to avoid deleting
// all parent-child relationship. This is used in the Cut
// operation where the subtree can be pasted
if (deleteFromParent)
{
if (IsFirstChild(element))
{
// set the Child reference of the parent to the next
element.GetParent().SetChild(element.GetNext());
}
}
// delete its children
var child = element.GetChild();
while (child != null)
{
DeleteElement(child, false);
child = child.GetNext();
}
// delete the element from the colloection
svgDocumentElements.Remove(element.GetInternalId());
return(true);
}
private bool IsLastSibling(SvgElement element)
{
SvgElement last = GetLastSibling(element);
if (last == null)
{
return(false);
}
return(element.GetInternalId() == last.GetInternalId());
}
private bool IsFirstChild(SvgElement element)
{
if (element.GetParent() == null)
{
return(false);
}
if (element.GetParent().GetChild() == null)
{
return(false);
}
return(element.GetInternalId() == element.GetParent().GetChild().GetInternalId());
}
/// <summary>
/// It adds the new element eleToAdd 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="eleToAdd">Element to be added.</param>
/// <returns>
/// true if the element is successfully, false otherwise
/// </returns>
public bool AddElement(SvgElement parent, SvgElement eleToAdd)
{
if (eleToAdd == null || svgRoot == null)
{
ErrorMessage = "Element to be added and Svg Root Element were both Null.";
return(false);
}
SvgElement parentToAdd = svgRoot;
if (parent != null)
{
parentToAdd = parent;
}
eleToAdd.SetInternalId(svgDocumentNextInternalId++);
svgDocumentElements.Add(eleToAdd.GetInternalId(), eleToAdd);
eleToAdd.SetParent(parentToAdd);
if (parentToAdd.GetChild() == null)
{
// the element is the first child
parentToAdd.SetChild(eleToAdd);
}
else
{
// add the element as the last sibling
var last = GetLastSibling(parentToAdd.GetChild());
if (last != null)
{
last.SetNext(eleToAdd);
eleToAdd.SetPrevious(last);
}
}
return(true);
}
private bool IsLastSibling(SvgElement element)
{
SvgElement last = GetLastSibling(element);
if ( last == null )
{
return false;
}
return (element.GetInternalId() == last.GetInternalId());
}
private bool IsFirstChild(SvgElement element)
{
if ( element.GetParent() == null )
{
return false;
}
if ( element.GetParent().GetChild() == null )
{
return false;
}
return (element.GetInternalId() == element.GetParent().GetChild().GetInternalId());
}
private bool DeleteElement(SvgElement element, bool deleteFromParent)
{
if ( element == null )
{
return false;
}
var parent = element.GetParent();
if ( parent == null )
{
// root node cannot be delete!
ErrorMessage = "root node cannot be delete!";
return false;
}
// set the Next reference of the previous
if ( element.GetPrevious() != null )
{
element.GetPrevious().SetNext(element.GetNext());
}
// set the Previous reference of the next
if ( element.GetNext() != null )
{
element.GetNext().SetPrevious(element.GetPrevious());
}
// check if the element is the first child
// the deleteFromParent flag is used to avoid deleting
// all parent-child relationship. This is used in the Cut
// operation where the subtree can be pasted
if ( deleteFromParent )
{
if ( IsFirstChild(element) )
{
// set the Child reference of the parent to the next
element.GetParent().SetChild(element.GetNext());
}
}
// delete its children
var child = element.GetChild();
while ( child != null )
{
DeleteElement(child, false);
child = child.GetNext();
}
// delete the element from the colloection
svgDocumentElements.Remove(element.GetInternalId());
return true;
}
/// <summary>
/// It adds the new element eleToAdd 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="eleToAdd">Element to be added.</param>
/// <returns>
/// true if the element is successfully, false otherwise
/// </returns>
public bool AddElement(SvgElement parent, SvgElement eleToAdd)
{
if ( eleToAdd == null || svgRoot == null )
{
ErrorMessage = "Element to be added and Svg Root Element were both Null.";
return false;
}
SvgElement parentToAdd = svgRoot;
if ( parent != null )
{
parentToAdd = parent;
}
eleToAdd.SetInternalId(svgDocumentNextInternalId++);
svgDocumentElements.Add(eleToAdd.GetInternalId(), eleToAdd);
eleToAdd.SetParent(parentToAdd);
if (parentToAdd.GetChild() == null )
{
// the element is the first child
parentToAdd.SetChild(eleToAdd);
}
else
{
// add the element as the last sibling
var last = GetLastSibling(parentToAdd.GetChild());
if ( last != null )
{
last.SetNext(eleToAdd);
eleToAdd.SetPrevious(last);
}
}
return true;
}
private void AddNodeToTree(SvgElement eleParent,
SvgElement eleToAdd,
SvgElement eleBefore)
{
if (eleToAdd == null)
{
return;
}
string sNodeName = eleToAdd.GetElementName();
string sId;
sId = eleToAdd.Id;
if (sId != "")
{
sNodeName += "_";
sNodeName += sId;
//sNodeName += ")";
}
TreeViewItem node = new TreeViewItem { Name = sNodeName };
node.Tag = eleToAdd.GetInternalId();
TreeViewItem nodeParent = null;
TreeViewItem nodeBefore = null;
if (eleParent != null)
{
nodeParent = FindNodeByTag(null, eleParent.GetInternalId().ToString());
}
if (eleBefore != null)
{
nodeBefore = FindNodeByTag(nodeParent, eleBefore.GetInternalId().ToString());
}
if (nodeParent == null)
{
if (nodeBefore == null)
{
TreeViewPrintFile.Items.Add(node);
}
else
{
//TreeViewPrintFile.Items.Insert(nodeBefore.Index, node);
}
}
else
{
if (nodeBefore == null)
{
nodeParent.Items.Add(node);
}
else
{
//nodeParent.Items.Insert(nodeBefore.Index, node);
}
}
//node.ImageIndex = (int)eleToAdd.getElementType();
//node.SelectedImageIndex = nod.ImageIndex;
//node.Expand();
if (eleToAdd.GetChild() != null)
{
AddNodeToTree(eleToAdd, eleToAdd.GetChild(), null);
SvgElement nxt = eleToAdd.GetChild().GetNext();
while (nxt != null)
{
AddNodeToTree(eleToAdd, nxt, null);
nxt = nxt.GetNext();
}
}
TreeViewPrintFile.Items.MoveCurrentTo(node);
}