//public virtual int GetLengthBefore(TikzParseItem tpi)
//{
// return ToString().Length; //
//}
/// <summary>
/// This method triggers a TextChanged event in the root of the parse tree.
/// </summary>
/// <param name="sender">The node whose text was changed.</param>
/// <param name="oldtext">the text of the node before the change.</param>
public virtual void RaiseTextChanged(TikzParseItem sender, string oldtext)
{
if (parent != null)
parent.RaiseTextChanged(sender, oldtext);
}
/// <summary>
/// Adjusts the current coordinates (seen as coordinates of relto)
/// such that relto sits at p in absolute coordinates.
/// The extra parameter is needed since this method is called by Tikz_Node, which
/// contains a Tikz_Coord object. (In that case relto will be the Tikz_Node)
/// relto is used to query, e.g., the current position in the Tikz Path.
/// (Which is a parent of relto, but not of the current coordinate.)
/// </summary>
/// <param name="p">The new absolute (cartesian) coordinates, in cm</param>
/// <param name="relto">Object with respect to which the coordinate transformation is determined</param>
public void SetAbsPos(Point p, TikzParseItem relto)
{
if (IsBroken || type == Tikz_CoordType.Named)
{
// cannot change coord
}
else
{
Point relp; // will hold the new coordinates, in the current coordinate system
TikzMatrix MM;
if (!relto.parent.GetCurrentTransformAt(relto, out MM))
return; // broken coord trafo -> do nothing
MM = MM.Inverse();
if (deco == "+" || deco == "++")
{
Point offset;
if (relto.parent is Tikz_Controls)
{
Tikz_Controls par = relto.parent as Tikz_Controls;
Tikz_XYItem offc = null;
if (relto == par.FirstCP)
offc = par.CoordBefore;
else if (relto == par.LastCP)
offc = par.CoordAfter;
if (offc == null || !offc.GetAbsPos(out offset))
return;
relp = new Point(p.X - offset.X, p.Y - offset.Y); // the desired shift, in absolute coordinates
relp = MM.Transform(relp, true);
}
else if ((relto.parent as Tikz_Path).GetAbsOffset(out offset, relto))
{
relp = new Point(p.X - offset.X, p.Y - offset.Y); // the desired shift, in absolute coordinates
relp = MM.Transform(relp, true);
}
else
{
// error in determining offset -> cannot set coordinate
return;
}
}
else
{
relp = MM.Transform(new Point(p.X, p.Y)); // this is the target point in current coordinate system
}
if (type == Tikz_CoordType.Polar)
{
relp = Helper.CartToPolTC(relp);
}
uX.SetInCM(relp.X);
uY.SetInCM(relp.Y);
}
}
/// <summary>
/// Get the last item that changes the "current position" in a tikz path.
/// This implememntation is not yet entirely accurate at present.... for example ... edge (v) .. does not change the current position.
/// </summary>
/// <param name="before">The item before which we should search.</param>
/// <param name="ret">The last item that changed the current position.</param>
/// <param name="VeryCurrent">Whether to return the last item changing the "very current" position (see GetAbsOffset).</param>
/// <returns></returns>
bool GetLastDrawnItem(TikzParseItem before, out Tikz_XYItem ret, bool VeryCurrent )
{
int ind;
if (before == null)
ind = Children.Count;
else
ind = Children.IndexOf(before);
//CoordTrafoInBetween = new TikzMatrix();
for (int i = ind - 1; i >= 0; i--)
{
if (Children[i] is Tikz_Coord)
{
Tikz_Coord tc = Children[i] as Tikz_Coord;
if (tc.type == Tikz_CoordType.Named || tc.deco != "+" || VeryCurrent)
{
ret = tc;
return true;
}
}
else if (Children[i] is Tikz_Arc)
{
ret = Children[i] as Tikz_Arc;
return true;
}
//else if (Children[i] is Tikz_Options)
//{
// CoordTrafoInBetween = (Children[i] as Tikz_Options).GetTransform() * CoordTrafoInBetween;
//}
else if (Children[i] is Tikz_Path)
{
Tikz_Path tp = (Children[i] as Tikz_Path);
Tikz_XYItem tpi;
//TikzMatrix M; // not used here
bool lret = tp.GetLastDrawnItem(null, out tpi, VeryCurrent);
if (lret)
{
ret = tpi;
return true;
}
}
}
// nothing found -> look in parent
if (this.parent is Tikz_Path)
{
Tikz_Path tparent = parent as Tikz_Path;
Tikz_XYItem tpi;
if (tparent.GetLastDrawnItem(this, out tpi, VeryCurrent))
{
ret = tpi;
return true;
}
}
// if we come here, nothing has been found...
ret = null;
return false;
}
public bool IsChildOfOrSelf(TikzParseItem tpi)
{
return (this == tpi) || Ancestors.Contains(tpi);
}
public override void RaiseTextChanged(TikzParseItem sender, string oldtext)
{
if (TextChanged != null)
TextChanged(this, new ParseTreeTextChangedEventArgs() { ChangedItem=sender, OldText=oldtext });
//base.RaiseTextChanged(sender, oldtext);
}
/// <summary>
/// Gets the offset, i.e., the current drawing position at some
/// position along the path. (in absolute Cartesian coordinates)
/// This is used to determine the absolute position of items specified with relative
/// coordinates like +(1,1).
///
/// Note that in Tikz two offsets are relevant:
/// Example:
/// \draw (0,0) +(1,1) node {1} +(3,3) -- (5,5);
/// Node 1 is placed at +(1,1), the "very current" position.
/// The coordinate +(3,3) is taken relative to the "current position", i.e., (0,0).
/// </summary>
/// <param name="tpi">The item just before which the current drawing position is to be determined.</param>
/// <param name="VeryCurrent">Whether to "very current" position.</param>
/// <returns>True, if offset could be determined, false otherwise.</returns>
public bool GetAbsOffset(out Point ret, TikzParseItem tpi, bool VeryCurrent = false)
{
Tikz_XYItem tcret;
if (GetLastDrawnItem(tpi, out tcret, VeryCurrent))
{
// last drawn item exists
TikzMatrix M2, M1;
if (!GetCurrentTransformAt(tpi, out M2) || !tcret.parent.GetCurrentTransformAt(tcret, out M1))
{
ret = new Point(0, 0);
return false;
}
Point p1;
if (tcret.GetAbsPos(out p1))
{
// p1 = M2 * orig point; offset = M1 * orig point (I guess) => offset = M1 * I(M2) * p1
ret = (M2 * (M1.Inverse())).Transform(p1);
return true;
}
else
{
ret = new Point(0, 0);
return false;
}
}
else
{
// no item was drawn before.... take origin (...after coord transform)
TikzMatrix M;
if (!GetCurrentTransformAt(tpi, out M))
{
ret = new Point(0, 0);
return false;
}
ret = M.Transform(new Point(0, 0));
return true;
}
/*int ind = Children.IndexOf(tpi);
Tikz_Coord previous = null;
for (int i = ind - 1; i >= 0; i--)
{
if (Children[i] is Tikz_Coord)
{
Tikz_Coord tc = Children[i] as Tikz_Coord;
if (tc.type == Tikz_CoordType.Named || tc.deco != "+")
{
previous = tc;
break;
}
}
}
if (previous == null)
return GetCurrentTransformAt(tpi).Transform(new Point(0,0));
else
return previous.GetAbsPos(); */
}
/* public TikzMatrix GetCurrentTransform()
{
TikzMatrix M;
//M = Tikz_Options.GetTransform(this);
if (options != null)
M = options.GetTransform();
else
M = new TikzMatrix();
if (parent != null)
M = parent.GetCurrentTransform() * M;
return M;
} */
/// <summary>
/// Determines the coordinate transformation at object childtpi,
/// or at the end of the container in case childtpi is null.
/// </summary>
/// <param name="childtpi">The object to determine coordinate trsf. at.</param>
/// <returns>The coordinate transformation.</returns>
public bool GetCurrentTransformAt(TikzParseItem childtpi, out TikzMatrix M)
{
if (parent != null)
{
if (!parent.GetCurrentTransformAt(this, out M))
return false;
}
else
M = new TikzMatrix(); // identity matrix
foreach (TikzParseItem tpi in Children)
{
if (tpi == childtpi && childtpi != null)
{
break;
}
else if (tpi is Tikz_Options)
{
TikzMatrix MM;
if ((tpi as Tikz_Options).GetTransform(out MM))
M = M * MM;
else
return false;
}
}
return true;
}
public void SetCorrectRaster(TikzParseItem tpi, bool IsParent = false)
{
if (ParseTree == null)
return;
if (tpi == null)
{
Tikz_Picture tp = ParseTree.GetTikzPicture();
if (tp != null)
{
TikzMatrix M;
if (!tp.GetCurrentTransformAt(null, out M))
Rasterizer.View.CoordinateTransform = new TikzMatrix(); // if the program gets here, the global coord. transformation could not be understood->ovelay should display nothing
else
Rasterizer.View.CoordinateTransform = M;
//rasterizer.RasterOrigin = M.Transform(new Point(0, 0));
//rasterizer.RasterScale = M.m[1, 1];
Rasterizer.View.IsCartesian = !UsePolarCoordinates;
}
}
else if (tpi is Tikz_Scope)
{
Tikz_Scope ts = tpi as Tikz_Scope;
TikzMatrix M;
if (IsParent)
{
if (!ts.GetCurrentTransformAt(null, out M)) // todo
M = new TikzMatrix(); // broken coords-> take unity as backup
}
else
{
//if (!ts.parent.GetCurrentTransformAt(ts, out M))
// M = new TikzMatrix();
if (!ts.GetRasterTransform(out M))
M = new TikzMatrix();
}
Rasterizer.View.CoordinateTransform = M;
//rasterizer.RasterOrigin = M.Transform(new Point(0, 0));
//rasterizer.RasterScale = M.m[1, 1];
Rasterizer.View.IsCartesian = !IsParent || !UsePolarCoordinates;
}
else if (tpi is Tikz_XYItem)
{
Tikz_XYItem t = tpi as Tikz_XYItem;
Point offset;
if (t.GetAbsPos(out offset, true))
{
TikzMatrix M;
if (!t.parent.GetCurrentTransformAt(t, out M)) //.CloneIt();
M = new TikzMatrix();
M.m[0, 2] = offset.X;
M.m[1, 2] = offset.Y;
//rasterizer.RasterScale = M.m[1, 1];
Rasterizer.View.CoordinateTransform = M;
Rasterizer.View.IsCartesian = !(t.IsPolar());
}
else throw new Exception("In PdfOverlay: Encountered drawn item without valid coordinates");
}
else if (tpi is Tikz_Path)
{
Tikz_Path ts = tpi as Tikz_Path;
TikzMatrix M;
if (IsParent)
{
Point curPointAtEnd;
if (!ts.GetCurrentTransformAt(null, out M)) // todo
M = new TikzMatrix(); // broken coords-> take unity as backup
if (ts.GetAbsOffset(out curPointAtEnd, null))
{
M.m[0, 2] = curPointAtEnd.X;
M.m[1, 2] = curPointAtEnd.Y;
}
}
else
{
if (!ts.parent.GetCurrentTransformAt(ts, out M))
M = new TikzMatrix();
//if (!ts.GetRasterTransform(out M))
// M = new TikzMatrix();
}
Rasterizer.View.CoordinateTransform = M;
//rasterizer.RasterOrigin = M.Transform(new Point(0, 0));
//rasterizer.RasterScale = M.m[1, 1];
Rasterizer.View.IsCartesian = !IsParent || !UsePolarCoordinates;
}
else
Debug.WriteLine("Error in SetCorrectRaster: unsupported type");//Rasterizer.IsCartesian = true; // should not get here
}
public void InsertChildAt(TikzParseItem tpi, int position)
{
tpi.parent = this;
Children.Insert(position, tpi);
// raise event
RaiseTextChanged(tpi, "");
RaiseParseTreeModified(new ParseTreeModifiedEventArgs() { AffectedItem = tpi, Type = ParseTreeModifiedType.Insert });
}
/// <summary>
/// Removes a child
/// </summary>
/// <param name="tpi"></param>
/// <param name="InsertAsFirst"></param>
public void RemoveChild(TikzParseItem tpi)
{
int startpos = tpi.StartPosition();
string oldtext = tpi.ToString();
tpi.parent = null;
Children.Remove(tpi);
// raise event
RaiseTextChanged(new DummyTikzParseItem(startpos), oldtext);
RaiseParseTreeModified(new ParseTreeModifiedEventArgs() { AffectedItem = tpi, Type = ParseTreeModifiedType.Remove });
}
/// <summary>
/// This should be called instead of adding nodes to Children directly
/// </summary>
/// <param name="tpi"></param>
public void AddChild(TikzParseItem tpi, bool InsertAsFirst=false)
{
tpi.parent = this;
if (InsertAsFirst)
Children.Insert(0, tpi);
else
Children.Add(tpi);
// raise event
RaiseTextChanged(tpi, "");
RaiseParseTreeModified(new ParseTreeModifiedEventArgs() { AffectedItem = tpi, Type = ParseTreeModifiedType.Insert });
}
IEnumerable<OverlayShapeVM> CreateOverlayShapesFromItem(TikzParseItem tpi)
{
var ret = new List<OverlayShapeVM>();
if (tpi is Tikz_Scope)
{
OverlayScope os = new OverlayScope();
//os.pol = this;
os.tikzitem = tpi as Tikz_Scope;
// add child shapes
os.children.AddRange( (tpi as TikzContainerParseItem).Children.SelectMany( child => CreateOverlayShapesFromItem(child) ) );
//foreach (TikzParseItem t in (tpi as TikzContainerParseItem).Children)
// DrawObject(t, os.children);
// don't draw scopes with no drawable children
// (we don't know where to render them)
if (os.children.Count > 0)
{
ret.Add(os);
os.AdjustPosition(TikzToScreen);
}
}
else if (tpi is TikzContainerParseItem)
{
ret.AddRange( (tpi as TikzContainerParseItem).Children.SelectMany( child => CreateOverlayShapesFromItem(child) ) );
}
else if (tpi is Tikz_XYItem)
{
if ((tpi as Tikz_XYItem).HasEditableCoordinate())
{
OverlayNode el;
if (tpi.parent is Tikz_Controls)
el = new OverlayControlPoint(); // control points for Bezier curves
else
el = new OverlayNode();
//el.pol = this;
el.tikzitem = tpi as Tikz_XYItem;
el.AdjustPosition(TikzToScreen);
// add tooltip
if (ParseTree != null)
{
Tikz_Node nref = TikzParseTreeHelper.GetReferenceableNode(tpi as Tikz_XYItem, ParseTree.GetTikzPicture());
if (nref != null && !String.IsNullOrWhiteSpace(nref.name))
{
el.ToolTip = nref.name;
}
}
////canvas1.Children.Add(el);
ret.Add(el);
//bbg.Add(new Rect(Canvas.GetLeft(el), Canvas.GetTop(el), el.Width, el.Height));
}
}
else if (tpi is Tikz_Path)
{
}
return ret;
}
/// <summary>
/// Adds a single parseitem to the display tree and redraws.
/// This is called by tools adding something to the parsetree to refresh the overlay
/// without redrawing it completely.
/// </summary>
/// <param name="tpi">The parseitem to add.</param>
public void AddToDisplayTree(TikzParseItem tpi)
{
List<OverlayShape> l = new List<OverlayShape>();
DrawObject(tpi, l);
if (CurEditing == null)
{
//do not redraw if there is nothing to show.
if (TopLevelItems == null)
RedrawObjects();
TopLevelItems.AddRange(l);
}
else
{
CurEditing.children.AddRange(l);
}
AdjustPositions();
BindControlPointsToOrigins();
}
/// <summary>
/// Gets the absolute position. For the significance of relto, see SetAbsPos()
/// </summary>
/// <param name="relto"></param>
/// <param name="OnlyOffset">Only the coordinate offset is returned. (This is used to determine the raster offset.)</param>
/// <returns>The position in the coordinates of the ancestral Tikz_Picture, or (0,0) in case of failure.</returns>
public bool GetAbsPos(out Point ret, TikzParseItem relto, bool OnlyOffset=false)
{
if (IsBroken || type == Tikz_CoordType.Invalid) // cannot determine coordinates
{
ret = new Point(0,0);
return false;
}
Point offset = new Point(0, 0);
if (type == Tikz_CoordType.Named)
{
if (relto.parent == null)
{
// node name not find in node list (either error or not parsed)
ret = new Point(0, 0);
return false;
}
// try to get referenced node...
if (nameref == "") // empty reference means that we reference the current position (treat as +(0,0))
{
// determine current position
if (relto.parent is Tikz_Path)
{
if (!(relto.parent as Tikz_Path).GetAbsOffset(out ret, relto))
{
// error in determining offset -> cannot determine coordinates
ret = new Point(0, 0);
return false;
}
else
return true; // success
}
else
{
// couldn't get offset, because the parent is some container I don't know -> fail
ret = new Point(0, 0);
return false;
}
}
Tikz_Node t = relto.parent.GetNodeByName(nameref);
if (t == null)
{
ret = new Point(0, 0);
return false;
}
else
{
// Tikz allows decorations (+, ++) in front of named coordinates, but not nodes (!!!)
// so we have to take care of this case separately
/*if ( (deco == "+" || deco == "++") && t.parent.starttag.Trim() == "\\coordinate")
{
if (relto.parent is Tikz_Path)
{
if (!(relto.parent as Tikz_Path).GetAbsOffset(out offset, relto))
{
// error in determining offset -> cannot determine coordinates
ret = new Point(0, 0);
return false;
}
}
if (t.GetAbsPos(out ret))
{
ret = new Point(ret.X + offset.X, ret.Y + offset.Y);
}
else
return false;
}
else*/
return t.GetAbsPos(out ret);
}
}
else if (type == Tikz_CoordType.Cartesian || type == Tikz_CoordType.Polar)
{
// determine offset if there is a decoration...
// for this we have to ask the parent Tikz Path what the current position is
if (deco == "+" || deco == "++")
{
// determine offset
if (relto.parent is Tikz_Path)
{
if (!(relto.parent as Tikz_Path).GetAbsOffset(out offset, relto))
{
// error in determining offset -> cannot determine coordinates
ret = new Point(0, 0);
return false;
}
}
else if (relto.parent is Tikz_Controls)
{
Tikz_Controls par = relto.parent as Tikz_Controls;
Tikz_XYItem offc = null;
if (relto == par.FirstCP)
offc = par.CoordBefore;
else if (relto == par.LastCP)
offc = par.CoordAfter;
if (offc == null || !offc.GetAbsPos(out offset))
{
ret = new Point(0, 0);
return false;
}
}
else
{
// not supported
}
Point relpos = new Point(uX.GetInCM(), uY.GetInCM());
if (type == Tikz_CoordType.Polar)
relpos = Helper.PolToCartTC(relpos);
if (relto.parent != null)
{
TikzMatrix M;
if (!relto.parent.GetCurrentTransformAt(relto, out M))
{
ret = new Point(0, 0);
return false;
}
relpos = M.Transform(relpos, true);
}
if (OnlyOffset)
{
ret = offset;
return true;
}
else
{
ret = new Point(offset.X + relpos.X, offset.Y + relpos.Y);
return true;
}
}
// standard coordinate (not relative etc.)
Point p = new Point(uX.GetInCM(), uY.GetInCM());
if (type == Tikz_CoordType.Polar)
p = Helper.PolToCartTC(p);
if (relto.parent == null)
{
if (OnlyOffset)
{
ret = new Point(0, 0);
}
else
{
ret = p;
}
return true;
}
else
{
TikzMatrix M;
if (!relto.parent.GetCurrentTransformAt(relto, out M))
{
ret = new Point(0, 0);
return false;
}
//Point pret;
if (OnlyOffset)
{
ret = M.Transform(new Point(0, 0));
}
else
{
ret = M.Transform(p);
}
return true;
}
}
else // if (type == ...)
{
// Unsupported type
ret = new Point(0, 0);
return false;
}
}
public int GetLengthBefore(TikzParseItem tpi)
{
int pos = 0;
if (parent != null)
pos = parent.GetLengthBefore(this);
pos += starttag.Length;
//if (options != null)
// pos += options.ToString().Length;
foreach (TikzParseItem t in Children)
{
if (t == tpi)
break;
else
pos += t.ToString().Length;
}
return pos;
}
private void pdfOverlay1_OnModified(TikzParseItem sender, string oldtext)
{
// update code
int InsertAt = sender.StartPosition();
if (InsertAt > txtCode.Text.Length)
{
MainWindow.AddStatusLine("Trying to insert code \"" + sender.ToString().Replace(Environment.NewLine, "<NEWLINE>") + "\" to position " + sender.StartPosition() + " but document has only " + txtCode.Text.Length + " characters."
+ " Inserting code at end of document instead. Code does probably not compile now. Please correct or choose undo.", true);
InsertAt = txtCode.Text.Length;
}
txtCode.Document.Replace(InsertAt, oldtext.Length, sender.ToString());
}
/// <summary>
/// Draws the TikzParseItem tpi, if it is drawn, or its children, if they can be drawn,
/// or grandchildren etc..., and adds the drawn items to bag.
/// </summary>
/// <param name="tpi"></param>
/// <param name="bag"></param>
public void DrawObject(TikzParseItem tpi, List<OverlayShape> bag)
{
//BBGatherer bbg = new BBGatherer();
if (bag == null)
bag = new List<OverlayShape>(); // dummy, it is not used
if (tpi is Tikz_Scope)
{
OverlayScope os = new OverlayScope(ShapeFactory.NewScopeView());
os.pol = this;
os.tikzitem = tpi as Tikz_Scope;
foreach (TikzParseItem t in (tpi as TikzContainerParseItem).Children)
DrawObject(t, os.children);
// don't draw scopes with no drawable children
// (we don't know where to render them)
if (os.children.Count > 0)
{
bag.Add(os);
os.AdjustPosition(Resolution);
////canvas1.Children.Add(os);
}
}
else if (tpi is TikzContainerParseItem)
{
foreach (TikzParseItem t in (tpi as TikzContainerParseItem).Children)
DrawObject(t, bag);
}
if (tpi is Tikz_XYItem)
{
if ((tpi as Tikz_XYItem).HasEditableCoordinate())
{
OverlayNode el;
if (tpi.parent is Tikz_Controls)
el = new OverlayControlPoint(ShapeFactory.NewCPView()); // control points for Bezier curves
else
el = new OverlayNode(ShapeFactory.NewNodeView());
el.pol = this;
el.tikzitem = tpi as Tikz_XYItem;
//Ellipse el = new Ellipse();
//el.Stroke = Brushes.Red;
el.AdjustPosition(Resolution);
// add tooltip
Tikz_Node nref = TikzParseTreeHelper.GetReferenceableNode(tpi as Tikz_XYItem, ParseTree.GetTikzPicture());
if (nref != null && nref.name != "")
{
el.View.SetToolTip(nref.name);
}
////canvas1.Children.Add(el);
bag.Add(el);
//bbg.Add(new Rect(Canvas.GetLeft(el), Canvas.GetTop(el), el.Width, el.Height));
}
}
else if (tpi is Tikz_Path)
{
//could this be a possibility to show edges and provide backward search?
//there are many possibility for draw commands. here we
/* string simpleEdge_RegexString = @"[ \t\s]*\\draw.*\((?<start>.*)\).*\((?<end>.*)\).*";
Regex BB_Regex = new Regex(simpleEdge_RegexString);
Match m = BB_Regex.Match(tpi.ToString());
if (m.Success == true)
{
//we just found a LaTex draw cmd, e.g.: \draw[default_edge] (v91) to (v99);
//get both nodes
Tikz_Node StartNode = tpi.parent.GetNodeByName(m.Groups[1].Value);
Tikz_Node EndNode = tpi.parent.GetNodeByName(m.Groups[2].Value);
if (StartNode != null && EndNode != null)
{
//and determine the position in between both nodes
Point start, end;
if (StartNode.GetAbsPos()
double x = (StartNode.GetAbsPos().X + EndNode.GetAbsPos().X) / 2;
double y = (StartNode.GetAbsPos().Y + EndNode.GetAbsPos().Y) / 2;
//draw an arrow at this pos.
//(new Point(x, y));
//and when clicked, jump to AvalonEdit at position tpi.StartPosition
}
} */
}
}
