/// <summary>
/// It creates a new SVG Desc element.
/// </summary>
/// <param name="parent">Parent element. If null the element is added under the root.</param>
/// <returns>New element created.</returns>
public SvgDesc AddDesc(SvgElement parent)
{
var desc = new SvgDesc(this);
AddElement(parent, desc);
return desc;
}
/// <summary>
/// It creates a new SVG Circle element.
/// </summary>
/// <param name="parent">Parent element. If null the element is added under the root.</param>
/// <returns>New element created.</returns>
public SvgCircle AddCircle(SvgElement parent)
{
var circle = new SvgCircle(this);
AddElement(parent, circle);
return circle;
}
protected SvgElement(SvgDocument doc)
{
LocalSvgDocument = doc;
attributes = new ArrayList();
AddAttribute(SvgAttribute.SvgAttributes.AttrCoreId, null);
ParentElement = null;
ChildElement = null;
NextElement = null;
PreviousElement = null;
ElementName = "unsupported";
ElementValue = "";
HasValue = false;
ElementType = SvgElementType.TypeUnsupported;
}
/// <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 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 deletes an element from the document.
/// </summary>
/// <param name="element">Element to be deleted.</param>
/// <returns>
/// true if the element has been successfully deleted; false otherwise.
/// </returns>
public bool DeleteElement(SvgElement element)
{
return(DeleteElement(element, true));
}
/// <summary>
/// It moves the element one level up in the tree hierarchy.
/// </summary>
/// <param name="element">Element to be moved.</param>
/// <returns>
/// true if the operation succeeded.
/// </returns>
public bool ElementLevelUp(SvgElement element)
{
var parent = element.GetParent();
if ( parent == null )
{
ErrorMessage = "Root node cannot be moved";
return false;
}
if ( parent.GetParent() == null )
{
ErrorMessage = "An element cannot be moved up to the root";
return false;
}
var next = element.GetNext();
// the first child of the parent became the next
parent.SetChild(next);
if ( next != null )
{
next.SetPrevious(null);
}
// get the last sibling of the parent
var last = GetLastSibling(parent);
if ( last != null )
{
last.SetNext(element);
}
element.SetParent(parent.GetParent());
element.SetPrevious(last);
element.SetNext(null);
return true;
}
/// <summary>
/// It sets the next sibling element.
/// </summary>
/// <param name="element">New next element.</param>
public void SetNext(SvgElement element)
{
NextElement = element;
}
/// <summary>
/// It creates a new SVG Text element.
/// </summary>
/// <param name="parent">Parent element. If null the element is added under the root.</param>
/// <returns>New element created.</returns>
public SvgText AddText(SvgElement parent)
{
var txt = new SvgText(this);
AddElement(parent, txt);
return txt;
}
/// <summary>
/// It creates a new element copying all attributes from elementToClone; 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="elementToClone">Element to be cloned</param>
/// <returns></returns>
public SvgElement CloneElement(SvgElement parent, SvgElement elementToClone)
{
// calculate unique id
var sOldId = elementToClone.GetAttributeStringValue(SvgAttribute.SvgAttributes.AttrCoreId);
var sNewId = sOldId;
if ( sOldId != "" )
{
int i = 1;
// check if it is unique
while ( GetSvgElement(sNewId) != null )
{
sNewId = sOldId + "_" + i.ToString();
i++;
}
}
// clone operation
var newElement = AddElement(parent, elementToClone.GetElementName());
newElement.CloneAttributeList(elementToClone);
if ( sNewId != "" )
{
newElement.SetAttributeValue(SvgAttribute.SvgAttributes.AttrCoreId, sNewId);
}
if ( elementToClone.GetChild() != null )
{
newElement.SetChild(CloneElement(newElement, elementToClone.GetChild()));
if ( elementToClone.GetChild().GetNext() != null )
{
newElement.GetChild().SetNext(CloneElement(newElement, elementToClone.GetChild().GetNext()));
}
}
return newElement;
}
/// <summary>
/// It sets the parent element.
/// </summary>
/// <param name="ele">New parent element</param>
public void SetParent(SvgElement ele)
{
ParentElement = ele;
}
/// <summary>
/// It creates a new SVG Polygon element.
/// </summary>
/// <param name="parent">Parent element. If null the element is added under the root.</param>
/// <returns>New element created.</returns>
public SvgPolygon AddPolygon(SvgElement parent)
{
var poly = new SvgPolygon(this);
AddElement(parent, poly);
return poly;
}
private void AddNodeToTree(SvgElement ele)
{
if (ele == null)
{
return;
}
SvgElement parent = GetCurrentSvgElement();
AddNodeToTree(parent, ele, null);
}
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);
}
/// <summary>
/// It copies all the attributes of the element elementToClone to the
/// current element.
/// </summary>
/// <param name="elementToClone">Element that has to be cloned.</param>
public void CloneAttributeList(SvgElement elementToClone)
{
var attributeType = new ArrayList();
var attributeName = new ArrayList();
var attributeValue = new ArrayList();
elementToClone.FillAttributeList(attributeType, attributeName, attributeValue);
attributes.Clear();
// copy the attributes
for (var i = 0; i < attributeType.Count; i++ )
{
AddAttribute((SvgAttribute.SvgAttributes) attributeType[i], attributeValue[i]);
}
// copy the value
if ( HasValue )
{
ElementValue = elementToClone.ElementValue;
}
}
/// <summary>
/// It sets the previous element.
/// </summary>
/// <param name="element">New previous element.</param>
public void SetPrevious(SvgElement element)
{
PreviousElement = element;
}
/// <summary>
/// It sets the parent element.
/// </summary>
/// <param name="ele">New parent element</param>
public void SetParent(SvgElement ele)
{
ParentElement = ele;
}
/// <summary>
/// It creates a new SVG Line element.
/// </summary>
/// <param name="parent">Parent element. If null the element is added under the root.</param>
/// <returns>New element created.</returns>
public SvgLine AddLine(SvgElement parent)
{
var line = new SvgLine(this);
AddElement(parent, line);
return line;
}
/// <summary>
/// It sets the first child element.
/// </summary>
/// <param name="ele">New child.</param>
public void SetChild(SvgElement ele)
{
ChildElement = ele;
}
/// <summary>
/// It creates a new SVG Path element.
/// </summary>
/// <param name="parent">Parent element. If null the element is added under the root.</param>
/// <returns>New element created.</returns>
public SvgPath AddPath(SvgElement parent)
{
var path = new SvgPath(this);
AddElement(parent, path);
return path;
}
/// <summary>
/// It sets the next sibling element.
/// </summary>
/// <param name="element">New next element.</param>
public void SetNext(SvgElement element)
{
NextElement = element;
}
/// <summary>
/// It creates a new SVG Rect element.
/// </summary>
/// <param name="parent">Parent element. If null the element is added under the root.</param>
/// <returns>New element created.</returns>
public SvgRect AddRect(SvgElement parent)
{
var rect = new SvgRect(this);
AddElement(parent, rect);
return rect;
}
/// <summary>
/// It moves the element after its current next sibling.
/// </summary>
/// <param name="element">Element to be moved.</param>
/// <returns>
/// true if the operation succeeded.
/// </returns>
public bool ElementPositionDown(SvgElement element)
{
var parent = element.GetParent();
if ( parent == null )
{
ErrorMessage = "Root node cannot be moved";
return false;
}
if ( IsLastSibling(element) )
{
ErrorMessage = "Element is already at the last sibling position";
return false;
}
var next = element.GetNext();
SvgElement next2 = null;
var previous = element.GetPrevious();
// fix Next
if ( next != null )
{
next.SetPrevious(element.GetPrevious());
next2 = next.GetNext();
next.SetNext(element);
}
// fix Previous
if ( previous != null )
{
previous.SetNext(next);
}
// fix Element
if ( IsFirstChild(element) )
{
parent.SetChild(next);
}
element.SetPrevious(next);
element.SetNext(next2);
if ( next2 != null )
{
next2.SetPrevious(element);
}
return true;
}
/// <summary>
/// It creates a new SVG Unsupported element.
/// </summary>
/// <param name="parent">Parent element. If null the element is added under the root.</param>
/// <param name="name">Name</param>
/// <returns>
/// New element created.
/// </returns>
/// <remarks>
/// The unsupported element is used when during the parsing of a file an unknown
/// element tag is found.
/// </remarks>
public SvgUnsupported AddUnsupported(SvgElement parent, string name)
{
var uns = new SvgUnsupported(this, name);
AddElement(parent, uns);
return uns;
}
/// <summary>
/// Load SVG document from a file.
/// </summary>
/// <param name="filename">The complete path of a valid SVG file.</param>
/// <returns>
/// True - the file is loaded successfully and it is a valid SVG document
/// False - the file cannot be opened or it is not a valid SVG document.
/// </returns>
public bool LoadFromFile(string filename)
{
if (svgRoot != null)
{
svgRoot = null;
svgDocumentNextInternalId = 1;
svgDocumentElements.Clear();
}
var result = true;
try
{
var reader = new XmlTextReader(filename)
{
WhitespaceHandling = WhitespaceHandling.None,
Normalization = false,
XmlResolver = null,
Namespaces = false
};
SvgElement parentElement = null;
try
{
// parse the file and display each of the nodes.
while (reader.Read() && result)
{
switch (reader.NodeType)
{
case XmlNodeType.Attribute:
break;
case XmlNodeType.Element:
var element = AddElement(parentElement, reader.Name);
if (element != null)
{
parentElement = element;
if (reader.IsEmptyElement)
{
if (parentElement != null)
{
parentElement = parentElement.GetParent();
}
}
var attribute = reader.MoveToFirstAttribute();
while (attribute)
{
element.SetAttributeValue(reader.Name, reader.Value);
attribute = reader.MoveToNextAttribute();
}
}
break;
case XmlNodeType.Text:
if (parentElement != null)
{
parentElement.SetElementValue(reader.Value);
}
break;
case XmlNodeType.CDATA:
break;
case XmlNodeType.ProcessingInstruction:
break;
case XmlNodeType.Comment:
break;
case XmlNodeType.XmlDeclaration:
svgDocumentXmlDeclaration = "<?xml " + reader.Value + "?>";
break;
case XmlNodeType.Document:
break;
case XmlNodeType.DocumentType:
{
var sDtd1 = reader.GetAttribute("PUBLIC");
var sDtd2 = reader.GetAttribute("SYSTEM");
svgDocumentXmlDocumentType = "<!DOCTYPE svg PUBLIC \"" + sDtd1 + "\" \"" + sDtd2 + "\">";
}
break;
case XmlNodeType.EntityReference:
break;
case XmlNodeType.EndElement:
if (parentElement != null)
{
parentElement = parentElement.GetParent();
}
break;
} // switch
} // while
} // read try
catch (XmlException xmle)
{
ErrorMessage =
$"{xmle.Message}\r\nLine Number: {xmle.LineNumber.ToString()}\r\nLine Position: {xmle.LinePosition.ToString()}";
result = false;
}
catch (Exception e)
{
ErrorMessage = e.Message;
result = false;
}
finally
{
reader.Close();
}
}
catch
{
ErrorMessage = "Unhandled Exception";
result = false;
}
return(result);
}
/// <summary>
/// It deletes an element from the document.
/// </summary>
/// <param name="element">Element to be deleted.</param>
/// <returns>
/// true if the element has been successfully deleted; false otherwise.
/// </returns>
public bool DeleteElement(SvgElement element)
{
return DeleteElement(element, true);
}
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 sets the previous element.
/// </summary>
/// <param name="element">New previous element.</param>
public void SetPrevious(SvgElement element)
{
PreviousElement = element;
}
/// <summary>
/// It sets the first child element.
/// </summary>
/// <param name="ele">New child.</param>
public void SetChild(SvgElement ele)
{
ChildElement = ele;
}
/// <summary>
/// It moves the element before its current previous sibling.
/// </summary>
/// <param name="element">Element to be moved.</param>
/// <returns>
/// true if the operation succeeded.
/// </returns>
public bool ElementPositionUp(SvgElement element)
{
var parent = element.GetParent();
if ( parent == null )
{
ErrorMessage = "Root node cannot be moved";
return false;
}
if ( IsFirstChild(element) )
{
ErrorMessage = "Element is already at the first position";
return false;
}
var next = element.GetNext();
var previous = element.GetPrevious();
SvgElement previous2 = null;
element.SetNext(null);
element.SetPrevious(null);
// fix Next
if ( next != null )
{
next.SetPrevious(previous);
}
// fix Previous
if ( previous != null )
{
previous.SetNext(next);
previous2 = previous.GetPrevious();
previous.SetPrevious(element);
// check if the Previous is the first child
if ( IsFirstChild(previous) )
{
// if yes the moved element has to became the new first child
if ( previous.GetParent() != null )
{
previous.GetParent().SetChild(element);
}
}
}
// fix Previous/Previous
if ( previous2 != null )
{
previous2.SetNext(element);
}
// fix Element
element.SetNext(previous);
element.SetPrevious(previous2);
return true;
}
/// <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="name">SVG element name.</param>
/// <returns>The new created element.</returns>
public SvgElement AddElement(SvgElement parent, string name)
{
SvgElement eleToReturn = null;
if ( name == "svg" )
{
svgRoot = new SvgRoot(this);
svgRoot.SetInternalId(svgDocumentNextInternalId++);
svgDocumentElements.Add(svgRoot.GetInternalId(), svgRoot);
eleToReturn = svgRoot;
}
else if ( name == "desc" )
{
eleToReturn = AddDesc(parent);
}
else if ( name == "text" )
{
eleToReturn = AddText(parent);
}
else if ( name == "g" )
{
eleToReturn = AddGroup(parent);
}
else if ( name == "rect" )
{
eleToReturn = AddRect(parent);
}
else if ( name == "circle" )
{
eleToReturn = AddCircle(parent);
}
else if ( name == "ellipse" )
{
eleToReturn = AddEllipse(parent);
}
else if ( name == "line" )
{
eleToReturn = AddLine(parent);
}
else if ( name == "path" )
{
eleToReturn = AddPath(parent);
}
else if ( name == "polygon" )
{
eleToReturn = AddPolygon(parent);
}
else if ( name == "image" )
{
eleToReturn = AddImage(parent);
}
else
{
if ( parent != null )
{
eleToReturn = AddUnsupported(parent, name);
}
}
return eleToReturn;
}
/// <summary>
/// It creates a new SVG Ellipse element.
/// </summary>
/// <param name="parent">Parent element. If null the element is added under the root.</param>
/// <returns>New element created.</returns>
public SvgEllipse AddEllipse(SvgElement parent)
{
var ellipse = new SvgEllipse(this);
AddElement(parent, ellipse);
return ellipse;
}
/// <summary>
/// It creates a new SVG Group element.
/// </summary>
/// <param name="parent">Parent element. If null the element is added under the root.</param>
/// <returns>New element created.</returns>
public SvgGroup AddGroup(SvgElement parent)
{
var grp = new SvgGroup(this);
AddElement(parent, grp);
return grp;
}
private SvgElement GetLastSibling(SvgElement element)
{
if ( element == null )
{
return null;
}
var last = element;
while (last.GetNext() != null)
{
last = last.GetNext();
}
return last;
}
/// <summary>
/// It creates a new SVG Image element.
/// </summary>
/// <param name="parent">Parent element. If null the element is added under the root.</param>
/// <returns>New element created.</returns>
public SvgImage AddImage(SvgElement parent)
{
var img = new SvgImage(this);
AddElement(parent, img);
return img;
}
private bool IsLastSibling(SvgElement element)
{
SvgElement last = GetLastSibling(element);
if ( last == null )
{
return false;
}
return (element.GetInternalId() == last.GetInternalId());
}
/// <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="name">SVG element name.</param>
/// <returns>The new created element.</returns>
public SvgElement AddElement(SvgElement parent, string name)
{
SvgElement eleToReturn = null;
if (name == "svg")
{
svgRoot = new SvgRoot(this);
svgRoot.SetInternalId(svgDocumentNextInternalId++);
svgDocumentElements.Add(svgRoot.GetInternalId(), svgRoot);
eleToReturn = svgRoot;
}
else if (name == "desc")
{
eleToReturn = AddDesc(parent);
}
else if (name == "text")
{
eleToReturn = AddText(parent);
}
else if (name == "g")
{
eleToReturn = AddGroup(parent);
}
else if (name == "rect")
{
eleToReturn = AddRect(parent);
}
else if (name == "circle")
{
eleToReturn = AddCircle(parent);
}
else if (name == "ellipse")
{
eleToReturn = AddEllipse(parent);
}
else if (name == "line")
{
eleToReturn = AddLine(parent);
}
else if (name == "path")
{
eleToReturn = AddPath(parent);
}
else if (name == "polygon")
{
eleToReturn = AddPolygon(parent);
}
else if (name == "image")
{
eleToReturn = AddImage(parent);
}
else
{
if (parent != null)
{
eleToReturn = AddUnsupported(parent, name);
}
}
return(eleToReturn);
}
