/// <summary>
/// Create a complete deep copy of the given tree of <c>SvgElement</c> objects.
/// A new set of elements is created, and if the attributes are cloneable they are deep-copied too.
/// Since strings and all SvgType classes are cloneable, the new tree is independant of the old.
/// </summary>
/// <param name="el"></param>
/// <returns></returns>
public static SvgElement CloneElement(SvgElement el)
{
SvgElement clone = (SvgElement)el.GetType().GetConstructor(new System.Type[0]).Invoke(new object[0]);
foreach(string key in el.Attributes.Keys)
{
object o = el[key];
if (typeof(ICloneable).IsInstanceOfType(o))
clone[key] = ((ICloneable)o).Clone();
else
clone[key] = o;
}
foreach(SvgElement ch in el.Children)
{
clone.AddChild(CloneElement(ch));
}
return clone;
}
/// <summary>
/// Used by LoadFromXML
/// </summary>
/// <param name="e"></param>
/// <param name="doc"></param>
/// <param name="el"></param>
private static void RecLoadFromXML(SvgElement e, XmlDocument doc, XmlElement el)
{
e.ReadXmlElement(doc, el);
foreach(XmlNode noddo in el.ChildNodes)
{
if (noddo.GetType() == typeof(XmlElement))
{
XmlElement childXml = (XmlElement)noddo;
Type t = (Type)_elementNameDictionary[childXml.Name];
SvgElement childSvg=null;
if (t == null)
{
childSvg = new SvgGenericElement(childXml.Name);
}
else
{
childSvg = (SvgElement)t.GetConstructor(new System.Type[0]).Invoke(new object[0]);
}
e.AddChild(childSvg);
RecLoadFromXML(childSvg, doc, childXml);
}
else if (noddo.GetType() == typeof(XmlText))
{
XmlText xt = (XmlText)noddo;
TextNode tn = new TextNode(xt.InnerText);
e.AddChild(tn);
}
}
}
/// <summary>
/// Adds a child, and sets the child's parent to this element.
/// </summary>
/// <param name="ch"></param>
public virtual void AddChild(SvgElement ch)
{
if (ch.Parent != null)
{
throw new SvgException("Child already has a parent", ch.ToString());
}
_children.Add(ch);
ch._parent = this;
}
/// <summary>
/// Adds a child, and sets the child's parent to this element.
/// </summary>
/// <param name="ch"></param>
public override void AddChild(SvgElement ch)
{
throw new SvgException("A TextNode cannot have children");
}
private void button1_Click(object sender, System.EventArgs e)
{
OpenFileDialog dlg = new OpenFileDialog();
if (dlg.ShowDialog() == DialogResult.OK)
{
string fname = dlg.FileName;
StreamReader str = File.OpenText(dlg.FileName);
tbIn.Text = str.ReadToEnd();
XmlDocument doc = new XmlDocument();
doc.Load(fname);
svgIn.SRC = fname;
_e = SvgFactory.LoadFromXML(doc, null);
string output = _e.WriteSVGString(true);
tbOut.Text = output;
StreamWriter tw = new StreamWriter("c:\\temp\\foo.svg", false);
tw.Write(output);
tw.Close();
svgOut.SRC = "c:\\temp\\foo.svg";
}
}
/// <summary>
/// Adds a child, and sets the child's parent to this element.
/// </summary>
/// <param name="ch"></param>
public override void AddChild(SvgElement ch)
{
throw new SvgException("A TextNode cannot have children");
}
Figure SvgElementToFigure(SvgElement e)
{
Figure f = null;
if (e is SvgRectElement || e is SvgImageElement)
{
if (e.Attributes.ContainsKey("x") && e.Attributes.ContainsKey("y") &&
e.Attributes.ContainsKey("width") && e.Attributes.ContainsKey("height"))
{
SvgLength X = new SvgLength((string)e.Attributes["x"]);
SvgLength Y = new SvgLength((string)e.Attributes["y"]);
SvgLength Width = new SvgLength((string)e.Attributes["width"]);
SvgLength Height = new SvgLength((string)e.Attributes["height"]);
DRect r = new DRect(X.Value, Y.Value, Width.Value, Height.Value);
if (e is SvgRectElement)
f = new RectFigure(r, 0);
else if (e is SvgImageElement)
{
SvgImageElement e2 = (SvgImageElement)e;
byte[] imgData = Read(e2.Href);
if (imgData != null)
f = new BitmapFigure(r, 0, imgData, Path.GetFileName(e2.Href));
}
}
}
else if (e is SvgEllipseElement)
{
SvgEllipseElement e2 = (SvgEllipseElement)e;
if (e2.Attributes.ContainsKey("cx") && e2.Attributes.ContainsKey("cy") &&
e2.Attributes.ContainsKey("rx") && e2.Attributes.ContainsKey("ry"))
{
e2.CX = new SvgLength((string)e2.Attributes["cx"]);
e2.CY = new SvgLength((string)e2.Attributes["cy"]);
e2.RX = new SvgLength((string)e2.Attributes["rx"]);
e2.RY = new SvgLength((string)e2.Attributes["ry"]);
f = new EllipseFigure(new DRect(e2.CX.Value - e2.RX.Value, e2.CY.Value - e2.RY.Value,
e2.RX.Value * 2, e2.RY.Value * 2), 0);
}
}
else if (e is SvgPathElement)
{
SvgPathElement e2 = (SvgPathElement)e;
if (e2.Attributes.ContainsKey("d"))
{
e2.D = new SvgPath((string)e2.Attributes["d"]);
// treat all paths as polygons for the moment
DPoints pts = new DPoints();
for (int i = 0; i < e2.D.Count; i++)
{
PathSeg s = e2.D[i];
if ((s.Type == SvgPathSegType.SVG_SEGTYPE_MOVETO || s.Type == SvgPathSegType.SVG_SEGTYPE_LINETO) &&
s.Abs)
pts.Add(new DPoint(s.Data[0], s.Data[1]));
}
if (pts.Count >= 3)
{
DRect r = pts.Bounds();
foreach (DPoint pt in pts)
{
pt.X = (pt.X - r.Left) / r.Width;
pt.Y = (pt.Y - r.Top) / r.Height;
}
f = new PolygonFigure(pts);
f.Rect = r;
}
}
}
else if (e is SvgPolylineElement)
{
SvgPolylineElement e2 = (SvgPolylineElement)e;
if (e2.Attributes.ContainsKey("points"))
f = new PolylineFigure(DPoints.FromString((string)e2.Attributes["points"]));
}
else if (e is SvgLineElement)
{
SvgLineElement e2 = (SvgLineElement)e;
if (e2.Attributes.ContainsKey("x1") && e2.Attributes.ContainsKey("y1") &&
e2.Attributes.ContainsKey("x2") && e2.Attributes.ContainsKey("y2"))
{
e2.X1 = new SvgLength((string)e2.Attributes["x1"]);
e2.Y1 = new SvgLength((string)e2.Attributes["y1"]);
e2.X2 = new SvgLength((string)e2.Attributes["x2"]);
e2.Y2 = new SvgLength((string)e2.Attributes["y2"]);
f = new LineFigure2(new DPoint(e2.X1.Value, e2.Y1.Value),
new DPoint(e2.X2.Value, e2.Y2.Value));
}
}
else if (e is SvgGroupElement)
{
SvgGroupElement e2 = (SvgGroupElement)e;
f = new GroupFigure();
GroupFigure gf = (GroupFigure)f;
foreach (SvgElement childEle in e2.Children)
{
Figure childFig = SvgElementToFigure(childEle);
if (childFig != null)
gf.ChildFigures.Add(childFig);
}
if (gf.ChildFigures.Count > 0)
gf.ChildFigures = gf.ChildFigures;
else
f = null;
}
else if (e is SvgTextElement)
{
double fontSize;
string fontFamily;
DColor fill;
bool bold, italic, underline;
string text = ExtractText(e, 0, out fontSize, out fontFamily, out fill, out bold, out italic, out underline);
while (text.EndsWith("\n"))
text = text.Substring(0, text.Length - 1);
if (text != null)
{
DPoint translation = GetSvgElementTranslation((SvgTextElement)e);
f = new TextFigure(translation, text, 0);
((TextFigure)f).FontSize = fontSize;
((TextFigure)f).FontName = fontFamily;
((TextFigure)f).Fill = fill;
((TextFigure)f).Bold = bold;
((TextFigure)f).Italics = italic;
((TextFigure)f).Underline = underline;
// set wrap threshold
const double editWidthMod = 1.435;
if (((SvgTextElement)e).Attributes.ContainsKey(NBTextEditWidth))
{
string editwidth = (string)((SvgTextElement)e).Attributes[NBTextEditWidth];
if (editwidth != null && editwidth.Length != 0)
{
((TextFigure)f).WrapThreshold = double.Parse(editwidth) * editWidthMod;
((TextFigure)f).WrapFontSize = ((TextFigure)f).FontSize;
((TextFigure)f).WrapText = true;
}
}
// scale
DPoint scale = GetSvgElementScale((SvgTextElement)e);
const double scaleMod = 0.694;
f.Width *= scale.X * scaleMod;
f.Height *= scale.Y * scaleMod;
}
}
if (f != null)
{
if (e is SvgStyledTransformedElement)
f.Rotation = GetSvgElementRotation((SvgStyledTransformedElement)e);
if (f is IFillable && e.Attributes.ContainsKey("fill"))
((IFillable)f).Fill = DColor.FromHtml((string)e.Attributes["fill"]);
if (f is IStrokeable)
{
if (e.Attributes.ContainsKey("stroke"))
((IStrokeable)f).Stroke = DColor.FromHtml((string)e.Attributes["stroke"]);
if (e.Attributes.ContainsKey("stroke-width"))
((IStrokeable)f).StrokeWidth = double.Parse((string)e.Attributes["stroke-width"]);
if (e.Attributes.ContainsKey("stroke-dasharray"))
((IStrokeable)f).StrokeStyle = NotebookDashArrayToStrokeStyle((string)e.Attributes["stroke-dasharray"]);
}
if (f is IMarkable)
{
if (e.Attributes.ContainsKey("marker-start"))
((IMarkable)f).StartMarker = NotebookMarkerToDMarker((string)e.Attributes["marker-start"]);
if (e.Attributes.ContainsKey("marker-end"))
((IMarkable)f).EndMarker = NotebookMarkerToDMarker((string)e.Attributes["marker-end"]);
}
if (f is IAlphaBlendable && e.Attributes.ContainsKey("opacity"))
((IAlphaBlendable)f).Alpha = double.Parse((string)e.Attributes["opacity"]);
applyLink(f, e);
applyLock(f, e);
}
return f;
}
string ExtractText(SvgElement e, int level, out double fontSize, out string fontFamily, out DColor fill, out bool bold, out bool italic, out bool underline)
{
string text;
text = "";
fontSize = 12;
fontFamily = "Arial";
fill = DColor.Black;
bold = false;
italic = false;
underline = false;
if ((e is SvgTextElement || e is SvgTspanElement) && e.Children.Count == 1 && e.Children[0] is TextNode)
{
text = ((TextNode)e.Children[0]).Text;
if (e.Attributes.ContainsKey(NBFontSizeAttr))
fontSize = double.Parse((string)e.Attributes[NBFontSizeAttr]);
if (e.Attributes.ContainsKey(NBFontFamilyAttr))
fontFamily = (string)e.Attributes[NBFontFamilyAttr];
if (e.Attributes.ContainsKey(NBFillAttr))
fill = DColor.FromHtml((string)e.Attributes[NBFillAttr]);
if (e.Attributes.ContainsKey(NBFontWeightAttr))
bold = NotebookFontWeightToBold((string)e.Attributes[NBFontWeightAttr]);
if (e.Attributes.ContainsKey(NBFontStyleAttr))
italic = NotebookFontStyleToItalic((string)e.Attributes[NBFontStyleAttr]);
if (e.Attributes.ContainsKey(NBTextDecorationAttr))
underline = NotebookTextDecorationToUnderline((string)e.Attributes[NBTextDecorationAttr]);
}
else
{
foreach (SvgElement child in e.Children)
{
string childText = ExtractText(child, level + 1, out fontSize, out fontFamily, out fill, out bold, out italic, out underline);
if (childText != null)
text += childText;
}
}
if (level == 1)
text += "\n";
return text;
}
void applyLock(Figure f, SvgElement e)
{
f.Locked = e.Attributes.ContainsKey(NBLockedAttr);
}
void applyLink(Figure f, SvgElement e)
{
if (e.Attributes.ContainsKey(NBLinkShortCutAttr))
{
string shortcut = (string)e.Attributes[NBLinkShortCutAttr];
if (shortcut.StartsWith(NBLinkHttpPrefix))
{
f.UserAttrs[Links.LinkType] = LinkType.WebPage.ToString();
f.UserAttrs[Links.Link] = shortcut;
}
else if (shortcut.StartsWith(NBLinkPagePrefix))
{
f.UserAttrs[Links.LinkType] = LinkType.Page.ToString();
f.UserAttrs[Links.Link] = GetPageNumberFromPageName(shortcut.Substring(NBLinkPagePrefix.Length)).ToString();
}
else if (shortcut == NBLinkFirstPage)
{
f.UserAttrs[Links.LinkType] = LinkType.Page.ToString();
f.UserAttrs[Links.Link] = LinkPage.First.ToString();
}
else if (shortcut == NBLinkLastPage)
{
f.UserAttrs[Links.LinkType] = LinkType.Page.ToString();
f.UserAttrs[Links.Link] = LinkPage.Last.ToString();
}
else if (shortcut == NBLinkNextPage)
{
f.UserAttrs[Links.LinkType] = LinkType.Page.ToString();
f.UserAttrs[Links.Link] = LinkPage.Next.ToString();
}
else if (shortcut == NBLinkPreviousPage)
{
f.UserAttrs[Links.LinkType] = LinkType.Page.ToString();
f.UserAttrs[Links.Link] = LinkPage.Previous.ToString();
}
else if (shortcut.StartsWith(NBLinkAttachmentPrefix))
{
f.UserAttrs[Links.LinkType] = LinkType.Attachment.ToString();
f.UserAttrs[Links.Link] = shortcut.Substring(NBLinkAttachmentPrefix.Length);
}
else if (shortcut.StartsWith(NBLinkFilePrefix))
{
f.UserAttrs[Links.LinkType] = LinkType.File.ToString();
f.UserAttrs[Links.Link] = shortcut.Substring(NBLinkFilePrefix.Length);
}
// link body?
if (e.Attributes.ContainsKey(NBLinkShortCutAreaAttr) && (string)e.Attributes[NBLinkShortCutAreaAttr] == "1")
f.UserAttrs[Links.LinkBody] = "";
}
}
private void button1_Click(object sender, System.EventArgs e)
{
OpenFileDialog dlg = new OpenFileDialog();
if (dlg.ShowDialog() == DialogResult.OK)
{
string fname = dlg.FileName;
StreamReader str = File.OpenText(dlg.FileName);
tbIn.Text = str.ReadToEnd();
XmlDocument doc = new XmlDocument();
doc.Load(fname);
svgIn.Navigate(new Uri(fname));
svgIn.Refresh(WebBrowserRefreshOption.Completely);
_e = SvgFactory.LoadFromXML(doc, null);
string output = _e.WriteSVGString(true);
tbOut.Text = output;
string tempFile = Path.Combine(AppDomain.CurrentDomain.BaseDirectory, "foo.svg");
StreamWriter tw = new StreamWriter(tempFile, false);
tw.Write(output);
tw.Close();
svgOut.Navigate(new Uri(tempFile));
svgOut.Refresh(WebBrowserRefreshOption.Completely);
}
}