private Bounds CreateArrow(double minWidth, double minHeight)
{
var arrow = new Bounds();
var headThickness = minHeight / 3;
var inset = 0.8;
var headLength = minHeight;
switch (direction)
{
case ReactionDirection.Forward:
{
var fp = new PathFigure();
arrow.Add(new LineElement(new Point(0, 0), new Point(minWidth - 0.5 * headLength, 0), minHeight / 14, fgcol));
fp.StartPoint = new Point(minWidth, 0);
fp.Segments.Add(new LineSegment(new Point(minWidth - headLength, +headThickness), true));
fp.Segments.Add(new LineSegment(new Point(minWidth - inset * headLength, 0), true));
fp.Segments.Add(new LineSegment(new Point(minWidth - headLength, -headThickness), true));
fp.IsClosed = true;
var path = new PathGeometry(new[] { fp });
arrow.Add(GeneralPath.ShapeOf(path, fgcol));
}
break;
case ReactionDirection.Backward:
{
var fp = new PathFigure();
arrow.Add(new LineElement(new Point(0.5 * headLength, 0), new Point(minWidth, 0), minHeight / 14, fgcol));
fp.StartPoint = new Point(0, 0);
fp.Segments.Add(new LineSegment(new Point(minHeight, +headThickness), true));
fp.Segments.Add(new LineSegment(new Point(minHeight - (1 - inset) * minHeight, 0), true));
fp.Segments.Add(new LineSegment(new Point(minHeight, -headThickness), true));
fp.IsClosed = true;
var path = new PathGeometry(new[] { fp });
arrow.Add(GeneralPath.ShapeOf(path, fgcol));
}
break;
case ReactionDirection.Bidirectional: // equilibrium?
{
var fp1 = new PathFigure
{
StartPoint = new Point(0, 0.5 * +headThickness)
};
fp1.Segments.Add(new LineSegment(new Point(minWidth + minHeight + minHeight, 0.5 * +headThickness), true));
fp1.Segments.Add(new LineSegment(new Point(minWidth + minHeight, 1.5 * +headThickness), true));
var fp2 = new PathFigure
{
StartPoint = new Point(minWidth + minHeight + minHeight, 0.5 * -headThickness)
};
fp2.Segments.Add(new LineSegment(new Point(0, 0.5 * -headThickness), true));
fp2.Segments.Add(new LineSegment(new Point(minHeight, 1.5 * -headThickness), true));
var path = new PathGeometry(new[] { fp1, fp2 });
arrow.Add(GeneralPath.OutlineOf(path, minHeight / 14, fgcol));
}
break;
}
return(arrow);
}
private IRenderingElement GenerateAbbreviationSgroup(IAtomContainer mol, Sgroup sgroup)
{
string label = sgroup.Subscript;
// already handled by symbol remapping
if (sgroup.Bonds.Count > 0 || string.IsNullOrEmpty(label))
{
return(new ElementGroup());
}
if (!CheckAbbreviationHighlight(mol, sgroup))
{
return(new ElementGroup());
}
// we're showing a label where there were no atoms before, we put it in the
// middle of all of those which were hidden
var sgroupAtoms = sgroup.Atoms;
Debug.Assert(sgroupAtoms.Any());
var highlight = sgroupAtoms.First().GetProperty <Color>(StandardGenerator.HighlightColorKey);
var style = parameters.GetHighlighting();
var glowWidth = parameters.GetOuterGlowWidth();
Vector2 labelCoords = GeometryUtil.Get2DCenter(sgroupAtoms);
ElementGroup labelgroup = new ElementGroup();
foreach (var outline in atomGenerator.GenerateAbbreviatedSymbol(label, HydrogenPosition.Right)
.Resize(1 / scale, 1 / -scale)
.GetOutlines())
{
if (highlight != null && style == HighlightStyle.Colored)
{
labelgroup.Add(GeneralPath.ShapeOf(outline, highlight));
}
else
{
labelgroup.Add(GeneralPath.ShapeOf(outline, foreground));
}
}
if (highlight != null && style == HighlightStyle.OuterGlow)
{
ElementGroup group = new ElementGroup
{
// outer glow needs to be being the label
StandardGenerator.OuterGlow(labelgroup, highlight, glowWidth, stroke),
labelgroup
};
return(group);
}
else
{
return(MarkedElement.MarkupAtom(labelgroup, null));
}
}
public void FilledPath()
{
SvgDrawVisitor visitor = new SvgDrawVisitor(50, 50, Depiction.UnitsMM);
visitor.Visit(GeneralPath.ShapeOf(CreateRoundRectangle(new WPF::Rect(0, 0, 10, 10), 2, 2), Colors.Blue));
var str = visitor.ToString();
Assert.AreEqual(
"<?xml version='1.0' encoding='UTF-8'?>\n"
+ "<!DOCTYPE svg PUBLIC \"-//W3C//DTD SVG 1.1//EN\" \"http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd\">\n"
+ "<svg version='1.2' xmlns='http://www.w3.org/2000/svg' xmlns:xlink='http://www.w3.org/1999/xlink' width='50mm' height='50mm' viewBox='0 0 50 50'>\n"
+ " <desc>Generated by the Chemistry Development Kit (http://github.com/cdk)</desc>\n"
+ " <g stroke-linecap='round' stroke-linejoin='round'>\n"
+ " <path d='M1 0h8c0.55 0 1 0.45 1 1v8c0 0.55 -0.45 1 -1 1h-8c-0.55 0 -1 -0.45 -1 -1v-8c0 -0.55 0.45 -1 1 -1z' stroke='none' fill='#0000FF'/>\n"
+ " </g>\n"
+ "</svg>\n",
str);
}
/// <summary>
/// Make an embedded text label for display in a CDK renderer. If a piece of text contains newlines
/// they are centred aligned below each other with a line height of 1.4.
/// </summary>
/// <param name="font">the font to embedded</param>
/// <param name="text">the text label</param>
/// <param name="color">the color</param>
/// <param name="scale">the resize, should include the model scale</param>
/// <returns>pre-rendered element</returns>
public static IRenderingElement EmbedText(Typeface font, double emSize, string text, Color color, double scale)
{
var lines = text.Split('\n');
var group = new ElementGroup();
double yOffset = 0;
double lineHeight = 1.4d;
foreach (var line in lines)
{
var outline = new TextOutline(line, font, emSize).Resize(scale, -scale);
var center = outline.GetCenter();
outline = outline.Translate(-center.X, -(center.Y + yOffset));
yOffset += lineHeight * outline.GetBounds().Height;
group.Add(GeneralPath.ShapeOf(outline.GetOutline(), color));
var logicalBounds = outline.LogicalBounds;
group.Add(new Bounds(logicalBounds.Left, logicalBounds.Top, logicalBounds.Right, logicalBounds.Bottom));
}
return(group);
}
private IRenderingElement GenerateSgroupBrackets(Sgroup sgroup,
IList <SgroupBracket> brackets,
IReadOnlyDictionary <IAtom, AtomSymbol> symbols,
string subscriptSuffix,
string superscriptSuffix)
{
// brackets are square by default (style:0)
var style = (int?)sgroup.GetValue(SgroupKey.CtabBracketStyle);
bool round = style != null && style == 1;
var result = new ElementGroup();
var atoms = sgroup.Atoms;
var crossingBonds = sgroup.Bonds;
// easy to depict in correct orientation, we just
// point each bracket at the atom of a crossing
// bond that is 'in' the group - this scales
// to more than two brackets
// first we need to pair the brackets with the bonds
var pairs = crossingBonds.Count == brackets.Count ? BracketBondPairs(brackets, crossingBonds) : Dictionaries.Empty <SgroupBracket, IBond>();
// override bracket layout around single atoms to bring them in closer
if (atoms.Count == 1)
{
var atom = atoms.First();
// e.g. 2 HCL, 8 H2O etc.
if (IsUnsignedInt(subscriptSuffix) &&
!crossingBonds.Any() &&
symbols.ContainsKey(atom))
{
var prefix = new TextOutline('·' + subscriptSuffix, font, emSize).Resize(1 / scale, 1 / -scale);
var prefixBounds = prefix.LogicalBounds;
var symbol = symbols[atom];
var bounds = symbol.GetConvexHull().Outline.Bounds;
// make slightly large
bounds = new Rect(bounds.Bottom - 2 * stroke,
bounds.Left - 2 * stroke,
bounds.Width + 4 * stroke,
bounds.Height + 4 * stroke);
prefix = prefix.Translate(bounds.Bottom - prefixBounds.Top,
symbol.GetAlignmentCenter().Y - prefixBounds.CenterY());
result.Add(GeneralPath.ShapeOf(prefix.GetOutline(), foreground));
}
// e.g. CC(O)nCC
else if (crossingBonds.Count > 0)
{
var scriptscale = labelScale;
var leftBracket = new TextOutline("(", font, emSize).Resize(1 / scale, 1 / -scale);
var rightBracket = new TextOutline(")", font, emSize).Resize(1 / scale, 1 / -scale);
var leftCenter = leftBracket.GetCenter();
var rightCenter = rightBracket.GetCenter();
if (symbols.ContainsKey(atom))
{
var symbol = symbols[atom];
var bounds = symbol.GetConvexHull().Outline.Bounds;
// make slightly large
bounds = new Rect(bounds.Left - 2 * stroke,
bounds.Top - 2 * stroke,
bounds.Width + 4 * stroke,
bounds.Height + 4 * stroke);
leftBracket = leftBracket.Translate(bounds.Left - 0.1 - leftCenter.X,
symbol.GetAlignmentCenter().Y - leftCenter.Y);
rightBracket = rightBracket.Translate(bounds.Right + 0.1 - rightCenter.X,
symbol.GetAlignmentCenter().Y - rightCenter.Y);
}
else
{
var p = atoms.First().Point2D.Value;
leftBracket = leftBracket.Translate(p.X - 0.2 - leftCenter.X, p.Y - leftCenter.Y);
rightBracket = rightBracket.Translate(p.X + 0.2 - rightCenter.X, p.Y - rightCenter.Y);
}
result.Add(GeneralPath.ShapeOf(leftBracket.GetOutline(), foreground));
result.Add(GeneralPath.ShapeOf(rightBracket.GetOutline(), foreground));
var rightBracketBounds = rightBracket.GetBounds();
// subscript/superscript suffix annotation
if (subscriptSuffix != null && subscriptSuffix.Any())
{
TextOutline subscriptOutline = LeftAlign(MakeText(subscriptSuffix.ToLowerInvariant(),
new Vector2(rightBracketBounds.Right,
rightBracketBounds.Top - 0.1),
new Vector2(-0.5 * rightBracketBounds.Width, 0),
scriptscale));
result.Add(GeneralPath.ShapeOf(subscriptOutline.GetOutline(), foreground));
}
if (superscriptSuffix != null && superscriptSuffix.Any())
{
var superscriptOutline = LeftAlign(MakeText(superscriptSuffix.ToLowerInvariant(),
new Vector2(rightBracketBounds.Right,
rightBracketBounds.Bottom + 0.1),
new Vector2(-rightBracketBounds.Width, 0),
scriptscale));
result.Add(GeneralPath.ShapeOf(superscriptOutline.GetOutline(), foreground));
}
}
}
else if (pairs.Any())
{
SgroupBracket suffixBracket = null;
Vector2? suffixBracketPerp = null;
foreach (var e in pairs)
{
var bracket = e.Key;
var bond = e.Value;
var inGroupAtom = atoms.Contains(bond.Begin) ? bond.Begin : bond.End;
var p1 = bracket.FirstPoint;
var p2 = bracket.SecondPoint;
var perp = VecmathUtil.NewPerpendicularVector(VecmathUtil.NewUnitVector(p1, p2));
// point the vector at the atom group
var midpoint = VecmathUtil.Midpoint(p1, p2);
if (Vector2.Dot(perp, VecmathUtil.NewUnitVector(midpoint, inGroupAtom.Point2D.Value)) < 0)
{
perp = Vector2.Negate(perp);
}
perp *= bracketDepth;
if (round)
{
result.Add(CreateRoundBracket(p1, p2, perp, midpoint));
}
else
{
result.Add(CreateSquareBracket(p1, p2, perp));
}
if (suffixBracket == null)
{
suffixBracket = bracket;
suffixBracketPerp = perp;
}
else
{
// is this bracket better as a suffix?
var sp1 = suffixBracket.FirstPoint;
var sp2 = suffixBracket.SecondPoint;
var bestMaxX = Math.Max(sp1.X, sp2.X);
var thisMaxX = Math.Max(p1.X, p2.X);
var bestMaxY = Math.Max(sp1.Y, sp2.Y);
var thisMaxY = Math.Max(p1.Y, p2.Y);
// choose the most eastern or.. the most southern
var xDiff = thisMaxX - bestMaxX;
var yDiff = thisMaxY - bestMaxY;
if (xDiff > EQUIV_THRESHOLD || (xDiff > -EQUIV_THRESHOLD && yDiff < -EQUIV_THRESHOLD))
{
suffixBracket = bracket;
suffixBracketPerp = perp;
}
}
}
// write the labels
if (suffixBracket != null)
{
var subSufPnt = suffixBracket.FirstPoint;
var supSufPnt = suffixBracket.SecondPoint;
// try to put the subscript on the bottom
var xDiff = subSufPnt.X - supSufPnt.X;
var yDiff = subSufPnt.Y - supSufPnt.Y;
if (yDiff > EQUIV_THRESHOLD || (yDiff > -EQUIV_THRESHOLD && xDiff > EQUIV_THRESHOLD))
{
var tmpP = subSufPnt;
subSufPnt = supSufPnt;
supSufPnt = tmpP;
}
// subscript/superscript suffix annotation
if (subscriptSuffix != null && subscriptSuffix.Any())
{
var subscriptOutline = LeftAlign(MakeText(subscriptSuffix.ToLowerInvariant(), subSufPnt, suffixBracketPerp.Value, labelScale));
result.Add(GeneralPath.ShapeOf(subscriptOutline.GetOutline(), foreground));
}
if (superscriptSuffix != null && superscriptSuffix.Any())
{
var superscriptOutline = LeftAlign(MakeText(superscriptSuffix.ToLowerInvariant(), supSufPnt, suffixBracketPerp.Value, labelScale));
result.Add(GeneralPath.ShapeOf(superscriptOutline.GetOutline(), foreground));
}
}
}
else if (brackets.Count == 2)
{
var b1p1 = brackets[0].FirstPoint;
var b1p2 = brackets[0].SecondPoint;
var b2p1 = brackets[1].FirstPoint;
var b2p2 = brackets[1].SecondPoint;
var b1vec = VecmathUtil.NewUnitVector(b1p1, b1p2);
var b2vec = VecmathUtil.NewUnitVector(b2p1, b2p2);
var b1pvec = VecmathUtil.NewPerpendicularVector(b1vec);
var b2pvec = VecmathUtil.NewPerpendicularVector(b2vec);
// Point the vectors at each other
if (Vector2.Dot(b1pvec, VecmathUtil.NewUnitVector(b1p1, b2p1)) < 0)
{
b1pvec = Vector2.Negate(b1pvec);
}
if (Vector2.Dot(b2pvec, VecmathUtil.NewUnitVector(b2p1, b1p1)) < 0)
{
b2pvec = Vector2.Negate(b2pvec);
}
// scale perpendicular vectors by how deep the brackets need to be
b1pvec *= bracketDepth;
b2pvec *= bracketDepth;
// bad brackets
if (double.IsNaN(b1pvec.X) || double.IsNaN(b1pvec.Y) ||
double.IsNaN(b2pvec.X) || double.IsNaN(b2pvec.Y))
{
return(result);
}
{
var path = new PathGeometry();
if (round)
{
{
// bracket 1 (cp: control point)
var pf = new PathFigure
{
StartPoint = new Point(b1p1.X + b1pvec.X, b1p1.Y + b1pvec.Y)
};
Vector2 cpb1 = VecmathUtil.Midpoint(b1p1, b1p2);
cpb1 += VecmathUtil.Negate(b1pvec);
var seg = new QuadraticBezierSegment
{
Point1 = new Point(cpb1.X, cpb1.Y),
Point2 = new Point(b1p2.X + b1pvec.X, b1p2.Y + b1pvec.Y)
};
pf.Segments.Add(seg);
path.Figures.Add(pf);
}
{
// bracket 2 (cp: control point)
var pf = new PathFigure
{
StartPoint = new Point(b2p1.X + b2pvec.X, b2p1.Y + b2pvec.Y)
};
var cpb2 = VecmathUtil.Midpoint(b2p1, b2p2);
cpb2 += VecmathUtil.Negate(b2pvec);
var seg = new QuadraticBezierSegment
{
Point1 = new Point(cpb2.X, cpb2.Y),
Point2 = new Point(b2p2.X + b2pvec.X, b2p2.Y + b2pvec.Y)
};
pf.Segments.Add(seg);
path.Figures.Add(pf);
}
}
else
{
{
// bracket 1
var pf = new PathFigure
{
StartPoint = new Point(b1p1.X + b1pvec.X, b1p1.Y + b1pvec.Y)
};
var seg = new PolyLineSegment();
seg.Points.Add(new Point(b1p1.X, b1p1.Y));
seg.Points.Add(new Point(b1p2.X, b1p2.Y));
seg.Points.Add(new Point(b1p2.X + b1pvec.X, b1p2.Y + b1pvec.Y));
pf.Segments.Add(seg);
path.Figures.Add(pf);
}
{
// bracket 2
var pf = new PathFigure
{
StartPoint = new Point(b2p1.X + b2pvec.X, b2p1.Y + b2pvec.Y)
};
var seg = new PolyLineSegment();
seg.Points.Add(new Point(b2p1.X, b2p1.Y));
seg.Points.Add(new Point(b2p2.X, b2p2.Y));
seg.Points.Add(new Point(b2p2.X + b2pvec.X, b2p2.Y + b2pvec.Y));
pf.Segments.Add(seg);
path.Figures.Add(pf);
}
}
result.Add(GeneralPath.OutlineOf(path, stroke, foreground));
}
// work out where to put the suffix labels (e.g. ht/hh/eu) superscript
// and (e.g. n, xl, c, mix) subscript
// TODO: could be improved
var b1MaxX = Math.Max(b1p1.X, b1p2.X);
var b2MaxX = Math.Max(b2p1.X, b2p2.X);
var b1MaxY = Math.Max(b1p1.Y, b1p2.Y);
var b2MaxY = Math.Max(b2p1.Y, b2p2.Y);
var subSufPnt = b2p2;
var supSufPnt = b2p1;
var subpvec = b2pvec;
var bXDiff = b1MaxX - b2MaxX;
var bYDiff = b1MaxY - b2MaxY;
if (bXDiff > EQUIV_THRESHOLD || (bXDiff > -EQUIV_THRESHOLD && bYDiff < -EQUIV_THRESHOLD))
{
subSufPnt = b1p2;
supSufPnt = b1p1;
subpvec = b1pvec;
}
var xDiff = subSufPnt.X - supSufPnt.X;
var yDiff = subSufPnt.Y - supSufPnt.Y;
if (yDiff > EQUIV_THRESHOLD || (yDiff > -EQUIV_THRESHOLD && xDiff > EQUIV_THRESHOLD))
{
var tmpP = subSufPnt;
subSufPnt = supSufPnt;
supSufPnt = tmpP;
}
// subscript/superscript suffix annotation
if (subscriptSuffix != null && subscriptSuffix.Any())
{
var subscriptOutline = LeftAlign(MakeText(subscriptSuffix.ToLowerInvariant(), subSufPnt, subpvec, labelScale));
result.Add(GeneralPath.ShapeOf(subscriptOutline.GetOutline(), foreground));
}
if (superscriptSuffix != null && superscriptSuffix.Any())
{
var superscriptOutline = LeftAlign(MakeText(superscriptSuffix.ToLowerInvariant(), supSufPnt, subpvec, labelScale));
result.Add(GeneralPath.ShapeOf(superscriptOutline.GetOutline(), foreground));
}
}
return(result);
}
private IRenderingElement GenerateAbbreviationSgroup(IAtomContainer mol, Sgroup sgroup)
{
string label = sgroup.Subscript;
// already handled by symbol remapping
if (sgroup.Bonds.Count > 0 || string.IsNullOrEmpty(label))
{
return(new ElementGroup());
}
if (!CheckAbbreviationHighlight(mol, sgroup))
{
return(new ElementGroup());
}
// we're showing a label where there were no atoms before, we put it in the
// middle of all of those which were hidden
var sgroupAtoms = sgroup.Atoms;
Debug.Assert(sgroupAtoms.Any());
var highlight = sgroupAtoms.First().GetProperty <Color>(StandardGenerator.HighlightColorKey);
var style = parameters.GetHighlighting();
var glowWidth = parameters.GetOuterGlowWidth();
Vector2 labelLocation;
if (mol.Atoms.Count == sgroup.Atoms.Count)
{
labelLocation = GeometryUtil.Get2DCenter(sgroupAtoms);
}
else
{
// contraction of part of a fragment, e.g. SALT
// here we work out the point we want to place the contract relative
// to the SGroup Atoms
labelLocation = new Vector2();
var sgrpCenter = GeometryUtil.Get2DCenter(sgroupAtoms);
var molCenter = GeometryUtil.Get2DCenter(mol);
var minMax = GeometryUtil.GetMinMax(sgroupAtoms);
var xDiff = sgrpCenter.X - molCenter.X;
var yDiff = sgrpCenter.Y - molCenter.Y;
if (xDiff > 0.1)
{
labelLocation.X = minMax[0]; // min x
label = INTERPUNCT + label;
}
else if (xDiff < -0.1)
{
labelLocation.X = minMax[2]; // max x
label = label + INTERPUNCT;
}
else
{
labelLocation.X = sgrpCenter.X;
label = INTERPUNCT + label;
}
if (yDiff > 0.1)
{
labelLocation.Y = minMax[1]; // min y
}
else if (yDiff < -0.1)
{
labelLocation.Y = minMax[3]; // max y
}
else
{
labelLocation.Y = sgrpCenter.Y;
}
}
var labelgroup = new ElementGroup();
foreach (var outline in atomGenerator.GenerateAbbreviatedSymbol(label, HydrogenPosition.Right)
.Center(labelLocation.X, labelLocation.Y)
.Resize(1 / scale, 1 / -scale)
.GetOutlines())
{
if (highlight != null && style == HighlightStyle.Colored)
{
labelgroup.Add(GeneralPath.ShapeOf(outline, highlight));
}
else
{
labelgroup.Add(GeneralPath.ShapeOf(outline, foreground));
}
}
if (highlight != null && style == HighlightStyle.OuterGlow)
{
var group = new ElementGroup
{
// outer glow needs to be being the label
StandardGenerator.OuterGlow(labelgroup, highlight, glowWidth, stroke),
labelgroup
};
return(group);
}
else
{
return(MarkedElement.MarkupAtom(labelgroup, null));
}
}
public IRenderingElement Generate()
{
if (!delocalisedDonuts)
{
return(null);
}
var group = new ElementGroup();
smallest = Cycles.EdgeShort.Find(mol).ToRingSet();
foreach (var ring in smallest)
{
if (!CanDelocalise(ring))
{
continue;
}
foreach (var bond in ring.Bonds)
{
bonds.Add(bond);
}
int charge = 0;
int unpaired = 0;
foreach (var atom in ring.Atoms)
{
var q = atom.FormalCharge ?? 0;
if (q == 0)
{
continue;
}
int nCyclic = 0;
foreach (var bond in mol.GetConnectedBonds(atom))
{
if (bond.IsInRing)
{
nCyclic++;
}
}
if (nCyclic > 2)
{
continue;
}
atoms.Add(atom);
charge += q;
}
var p2 = GeometryUtil.Get2DCenter(ring);
if (charge != 0)
{
var qText = charge < 0 ? "–" : "+";
if (charge < -1)
{
qText = Math.Abs(charge) + qText;
}
else if (charge > +1)
{
qText = Math.Abs(charge) + qText;
}
TextOutline qSym = new TextOutline(qText, font, emSize);
qSym = qSym.Resize(1 / scale, -1 / scale);
qSym = qSym.Translate(p2.X - qSym.GetCenter().X,
p2.Y - qSym.GetCenter().Y);
group.Add(GeneralPath.ShapeOf(qSym.GetOutline(), fgColor));
}
double s = GeometryUtil.GetBondLengthMedian(ring);
double n = ring.Bonds.Count;
double r = s / (2 * Math.Tan(Math.PI / n));
group.Add(new OvalElement(new WPF::Point(p2.X, p2.Y), r - 1.5 * dbSpacing,
stroke, false, fgColor));
}
return(group);
}
/// <summary>
/// Generate the intermediate <see cref="AtomSymbol"/> instances.
/// </summary>
/// <param name="container">structure representation</param>
/// <param name="symbolRemap">use alternate symbols (used for Sgroup shortcuts)</param>
/// <param name="visibility">defines whether an atom symbol is displayed</param>
/// <param name="parameters">render model parameters</param>
/// <returns>generated atom symbols (can contain <see langword="null"/>)</returns>
private AtomSymbol[] GenerateAtomSymbols(IAtomContainer container,
Dictionary <IAtom, string> symbolRemap,
SymbolVisibility visibility,
RendererModel parameters,
ElementGroup annotations,
Color foreground,
double stroke,
StandardDonutGenerator donutGen)
{
var scale = parameters.GetScale();
var annDist = parameters.GetAnnotationDistance() * (parameters.GetBondLength() / scale);
var annScale = (1 / scale) * parameters.GetAnnotationFontScale();
var annColor = parameters.GetAnnotationColor();
var halfStroke = stroke / 2;
var symbols = new AtomSymbol[container.Atoms.Count];
var builder = container.Builder;
// check if we should annotate attachment point numbers (maxAttach>1)
// and queue them all up for processing
var attachPoints = new List <IPseudoAtom>();
int maxAttach = 0;
for (int i = 0; i < container.Atoms.Count; i++)
{
var atom = container.Atoms[i];
if (IsHiddenFully(atom))
{
continue;
}
if (atom is IPseudoAtom)
{
var attachNum = ((IPseudoAtom)atom).AttachPointNum;
if (attachNum > 0)
{
attachPoints.Add((IPseudoAtom)atom);
}
if (attachNum > maxAttach)
{
maxAttach = attachNum;
}
}
var remapped = symbolRemap.ContainsKey(atom);
var bonds = container.GetConnectedBonds(atom);
var neighbors = container.GetConnectedAtoms(atom);
var visNeighbors = new List <IAtom>();
// if a symbol is remapped we only want to consider
// visible neighbors in the alignment calculation, otherwise
// we include all neighbors
foreach (var neighbor in neighbors)
{
if (!remapped || !IsHidden(neighbor))
{
visNeighbors.Add(neighbor);
}
}
var auxVectors = new List <Vector2>(1);
// only generate if the symbol is visible
if (visibility.Visible(atom, bonds, parameters) || remapped)
{
var hPosition = HydrogenPositionTools.Position(atom, visNeighbors);
if (atom.ImplicitHydrogenCount != null && atom.ImplicitHydrogenCount > 0)
{
auxVectors.Add(hPosition.Vector());
}
if (remapped)
{
symbols[i] = atomGenerator.GenerateAbbreviatedSymbol(symbolRemap[atom], hPosition);
}
else if (donutGen.IsChargeDelocalised(atom))
{
var charge = atom.FormalCharge;
atom.FormalCharge = 0;
// can't think of a better way to handle this without API
// change to symbol visibility
if (atom.AtomicNumber != 6)
{
symbols[i] = atomGenerator.GenerateSymbol(container, atom, hPosition, parameters);
}
atom.FormalCharge = charge;
}
else
{
symbols[i] = atomGenerator.GenerateSymbol(container, atom, hPosition, parameters);
}
if (symbols[i] != null)
{
// defines how the element is aligned on the atom point, when
// aligned to the left, the first character 'e.g. Cl' is used.
if (visNeighbors.Count < 4)
{
if (hPosition == HydrogenPosition.Left)
{
symbols[i] = symbols[i].AlignTo(AtomSymbol.SymbolAlignment.Right);
}
else
{
symbols[i] = symbols[i].AlignTo(AtomSymbol.SymbolAlignment.Left);
}
}
var p = atom.Point2D;
if (p == null)
{
throw new ArgumentException("Atom did not have 2D coordinates");
}
symbols[i] = symbols[i].Resize(1 / scale, 1 / -scale).Center(p.Value.X, p.Value.Y);
}
}
var label = GetAnnotationLabel(atom);
if (label != null)
{
// to ensure consistent draw distance we need to adjust the annotation distance
// depending on whether we are drawing next to an atom symbol or not.
double strokeAdjust = symbols[i] != null ? -halfStroke : 0;
var vector = NewAtomAnnotationVector(atom, bonds, auxVectors);
var annOutline = GenerateAnnotation(atom.Point2D.Value, label, vector, annDist + strokeAdjust, annScale, font, emSize, symbols[i]);
// the AtomSymbol may migrate during bond generation and therefore the annotation
// needs to be tied to the symbol. If no symbol is available the annotation is
// fixed and we can add it to the annotation ElementGroup right away.
if (symbols[i] != null)
{
symbols[i] = symbols[i].AddAnnotation(annOutline);
}
else
{
annotations.Add(GeneralPath.ShapeOf(annOutline.GetOutline(), annColor));
}
}
}
// label attachment points
if (maxAttach > 1)
{
var attachNumOutlines = new List <TextOutline>();
double maxRadius = 0;
foreach (IPseudoAtom atom in attachPoints)
{
int attachNum = atom.AttachPointNum;
// to ensure consistent draw distance we need to adjust the annotation distance
// depending on whether we are drawing next to an atom symbol or not.
var strokeAdjust = -halfStroke;
var vector = NewAttachPointAnnotationVector(
atom,
container.GetConnectedBonds(atom),
new List <Vector2>());
var outline = GenerateAnnotation(atom.Point2D.Value,
attachNum.ToString(),
vector,
1.75 * annDist + strokeAdjust,
annScale,
new Typeface(font.FontFamily, font.Style, WPF.FontWeights.Bold, font.Stretch),
emSize,
null);
attachNumOutlines.Add(outline);
var w = outline.GetBounds().Width;
var h = outline.GetBounds().Height;
var r = Math.Sqrt(w * w + h * h) / 2;
if (r > maxRadius)
{
maxRadius = r;
}
}
foreach (var outline in attachNumOutlines)
{
var group = new ElementGroup();
var radius = 2 * stroke + maxRadius;
var shape = new EllipseGeometry(outline.GetCenter(), radius, radius);
var area1 = Geometry.Combine(shape, outline.GetOutline(), GeometryCombineMode.Exclude, Transform.Identity);
group.Add(GeneralPath.ShapeOf(area1, foreground));
annotations.Add(group);
}
}
return(symbols);
}
/// <inheritdoc/>
public IRenderingElement Generate(IAtomContainer container, RendererModel parameters)
{
if (container.Atoms.Count == 0)
{
return(new ElementGroup());
}
var symbolRemap = new Dictionary <IAtom, string>();
StandardSgroupGenerator.PrepareDisplayShortcuts(container, symbolRemap);
var scale = parameters.GetScale();
var visibility = parameters.GetVisibility();
var coloring = parameters.GetAtomColorer();
var annotationColor = parameters.GetAnnotationColor();
var foreground = coloring.GetAtomColor(container.Builder.NewAtom("C"));
// the stroke width is based on the font. a better method is needed to get
// the exact font stroke but for now we use the width of the pipe character.
var fontStroke = new TextOutline("|", font, emSize).Resize(1 / scale, 1 / scale).GetBounds().Width;
var stroke = parameters.GetStrokeRatio() * fontStroke;
var annotations = new ElementGroup();
var donutGenerator = new StandardDonutGenerator(container, font, emSize, parameters, stroke);
var donuts = donutGenerator.Generate();
var symbols = GenerateAtomSymbols(container, symbolRemap,
visibility, parameters,
annotations, foreground,
stroke, donutGenerator);
var bondElements = StandardBondGenerator.GenerateBonds(container, symbols,
parameters, stroke,
font, emSize, annotations,
donutGenerator);
var style = parameters.GetHighlighting();
var glowWidth = parameters.GetOuterGlowWidth();
var backLayer = new ElementGroup();
var middleLayer = new ElementGroup();
var frontLayer = new ElementGroup();
// bond elements can simply be added to the element group
for (int i = 0; i < container.Bonds.Count; i++)
{
var bond = container.Bonds[i];
if (IsHidden(bond))
{
continue;
}
var highlight = GetHighlightColor(bond, parameters);
if (highlight != null && style == HighlightStyle.OuterGlow)
{
backLayer.Add(MarkedElement.Markup(OuterGlow(bondElements[i], highlight.Value, glowWidth, stroke), "outerglow"));
}
if (highlight != null && style == HighlightStyle.Colored)
{
frontLayer.Add(MarkedElement.MarkupBond(Recolor(bondElements[i], highlight.Value), bond));
}
else
{
middleLayer.Add(MarkedElement.MarkupBond(bondElements[i], bond));
}
}
// bonds for delocalised aromatic
frontLayer.Add(donuts);
// convert the atom symbols to IRenderingElements
for (int i = 0; i < container.Atoms.Count; i++)
{
var atom = container.Atoms[i];
if (IsHidden(atom))
{
continue;
}
var highlight = GetHighlightColor(atom, parameters);
var color = GetColorOfAtom(symbolRemap, coloring, foreground, style, atom, highlight);
if (symbols[i] == null)
{
// we add a 'ball' around atoms with no symbols (e.g. carbons)
if (highlight != null && style == HighlightStyle.OuterGlow)
{
backLayer.Add(MarkedElement.Markup(new OvalElement(ToPoint(atom.Point2D.Value), 1.75 * glowWidth * stroke, true, highlight.Value), "outerglow"));
}
continue;
}
var symbolElements = new ElementGroup();
foreach (var shape in symbols[i].GetOutlines())
{
GeneralPath path = GeneralPath.ShapeOf(shape, color);
symbolElements.Add(path);
}
// add the annotations of the symbol to the annotations ElementGroup
foreach (var shape in symbols[i].GetAnnotationOutlines())
{
annotations.Add(MarkedElement.Markup(GeneralPath.ShapeOf(shape, annotationColor), "annotation"));
}
if (highlight != null && style == HighlightStyle.OuterGlow)
{
backLayer.Add(MarkedElement.Markup(OuterGlow(symbolElements, highlight.Value, glowWidth, stroke), "outerglow"));
}
if (highlight != null && style == HighlightStyle.Colored)
{
frontLayer.Add(MarkedElement.MarkupAtom(symbolElements, atom));
}
else
{
middleLayer.Add(MarkedElement.MarkupAtom(symbolElements, atom));
}
}
// Add the Sgroups display elements to the front layer
var sgroups = StandardSgroupGenerator.Generate(parameters, stroke, font, emSize, foreground, atomGenerator, symbols, container);
frontLayer.Add(sgroups);
// Annotations are added to the front layer.
frontLayer.Add(annotations);
var group = new ElementGroup
{
backLayer,
middleLayer,
frontLayer
};
return(MarkedElement.MarkupMol(group, container));
}
/// <inheritdoc/>
public IRenderingElement Generate(IAtomContainer container, RendererModel model)
{
var highlight = container.GetProperty <IDictionary <IChemObject, int> >(IdMapKey);
if (highlight == null)
{
return(null);
}
var palette = model.GetHighlightPalette();
double radius = model.GetHighlightRadius() / model.GetScale();
var shapes = new Dictionary <int, Geometry>();
foreach (var atom in container.Atoms)
{
if (!highlight.TryGetValue(atom, out int id))
{
continue;
}
var area = shapes[id];
var shape = CreateAtomHighlight(atom, radius);
if (area == null)
{
shapes[id] = shape;
}
else
{
area = new CombinedGeometry(area, shape);
}
}
foreach (var bond in container.Bonds)
{
if (!highlight.TryGetValue(bond, out int id))
{
continue;
}
var area = shapes[id];
var shape = CreateBondHighlight(bond, radius);
if (area == null)
{
shapes[id] = (area = shape);
}
else
{
area = new CombinedGeometry(area, shape);
}
// punch out the area occupied by atoms highlighted with a
// different color
var a1 = bond.Begin;
var a2 = bond.End;
if (highlight.TryGetValue(a1, out int a1Id))
{
if (!a1Id.Equals(id))
{
area = new CombinedGeometry(GeometryCombineMode.Exclude, area, shapes[a1Id]);
}
}
if (highlight.TryGetValue(a2, out int a2Id))
{
if (!a2Id.Equals(id))
{
area = new CombinedGeometry(GeometryCombineMode.Exclude, area, shapes[a2Id]);
}
}
}
// create rendering elements for each highlight shape
var group = new ElementGroup();
foreach (var e in shapes)
{
group.Add(GeneralPath.ShapeOf(e.Value, palette.Color(e.Key)));
}
return(group);
}