public AtomSymbol GenerateAbbreviatedSymbol(string label, HydrogenPosition position)
{
var tokens = new List <string>();
if (AbbreviationLabel.Parse(label, tokens))
{
return(GenerateAbbreviationSymbol(tokens, position));
}
else
{
return(new AtomSymbol(new TextOutline(label, font, emSize), Array.Empty <TextOutline>()));
}
}
/// <summary>
/// Generate the displayed atom symbol for an atom in given structure with the specified hydrogen
/// position.
/// </summary>
/// <param name="container">structure to which the atom belongs</param>
/// <param name="atom">the atom to generate the symbol for</param>
/// <param name="position">the hydrogen position</param>
/// <param name="model">additional rendering options</param>
/// <returns>atom symbol</returns>
public AtomSymbol GenerateSymbol(IAtomContainer container, IAtom atom, HydrogenPosition position, RendererModel model)
{
if (atom is IPseudoAtom pAtom)
{
if (pAtom.AttachPointNum <= 0)
{
if ("*".Equals(pAtom.Label, StringComparison.Ordinal))
{
var mass = pAtom.MassNumber ?? 0;
var charge = pAtom.FormalCharge ?? 0;
var hcnt = pAtom.ImplicitHydrogenCount ?? 0;
var nrad = container.GetConnectedSingleElectrons(atom).Count();
if (mass != 0 || charge != 0 || hcnt != 0)
{
return(GeneratePeriodicSymbol(0, hcnt, mass, charge, nrad, position));
}
}
return(GeneratePseudoSymbol(AccessPseudoLabel(pAtom, "?"), position));
}
else
{
return(null); // attach point drawn in bond generator
}
}
else
{
var number = atom.AtomicNumber;
// unset the mass if it's the major isotope (could be an option)
var mass = atom.MassNumber;
if (number != 0 &&
mass != null &&
model != null &&
model.GetOmitMajorIsotopes() &&
IsMajorIsotope(number, mass.Value))
{
mass = null;
}
return(GeneratePeriodicSymbol(
number,
atom.ImplicitHydrogenCount ?? 0,
mass ?? -1,
atom.FormalCharge ?? 0,
container.GetConnectedSingleElectrons(atom).Count(), position));
}
}
/// <summary>
/// Position the hydrogen label relative to the element label.
/// </summary>
/// <param name="position">relative position where the hydrogen is placed</param>
/// <param name="element">the outline of the element label</param>
/// <param name="hydrogen">the outline of the hydrogen</param>
/// <returns>positioned hydrogen label</returns>
public TextOutline PositionHydrogenLabel(HydrogenPosition position, TextOutline element, TextOutline hydrogen)
{
var elementBounds = element.GetBounds();
var hydrogenBounds = hydrogen.GetBounds();
switch (position)
{
case HydrogenPosition.Above:
return(hydrogen.Translate(0, (elementBounds.Top - padding) - hydrogenBounds.Bottom));
case HydrogenPosition.Right:
return(hydrogen.Translate((elementBounds.Right + padding) - hydrogenBounds.Left, 0));
case HydrogenPosition.Below:
return(hydrogen.Translate(0, (elementBounds.Bottom + padding) - hydrogenBounds.Top));
case HydrogenPosition.Left:
return(hydrogen.Translate((elementBounds.Left - padding) - hydrogenBounds.Right, 0));
}
return(hydrogen); // never reached
}
/// <summary>
/// Position the charge label on the top right of either the element or hydrogen label. Where the
/// charge is placed depends on the number of hydrogens and their position relative to the
/// element symbol.
/// </summary>
/// <param name="hydrogens">number of hydrogen</param>
/// <param name="position">position of hydrogen</param>
/// <param name="charge">the charge label outline (to be positioned)</param>
/// <param name="element">the element label outline</param>
/// <param name="hydrogen">the hydrogen label outline</param>
/// <returns>positioned charge label</returns>
public TextOutline PositionChargeLabel(int hydrogens, HydrogenPosition position, TextOutline charge, TextOutline element, TextOutline hydrogen)
{
var chargeBounds = charge.GetBounds();
// the charge is placed to the top right of the element symbol
// unless either the hydrogen label or the hydrogen count label
// are in the way - in which case we place it relative to the
// hydrogen
var referenceBounds = element.GetBounds();
if (hydrogens > 0 && position == HydrogenPosition.Right)
{
referenceBounds = hydrogen.GetBounds();
}
else if (hydrogens > 1 && position == HydrogenPosition.Above)
{
referenceBounds = hydrogen.GetBounds();
}
return(charge.Translate((referenceBounds.Right + padding) - chargeBounds.Left,
(referenceBounds.Top - (chargeBounds.Height / 2)) - chargeBounds.Top));
}
public static string Name(this HydrogenPosition value) => names[(int)value];
/// <summary> /// The directional vector for this hydrogen position. /// </summary> public static Vector2 Vector(this HydrogenPosition value) => V[(int)value].Vector;
/// <summary>
/// Generate an atom symbol for a periodic element with the specified number of hydrogens, ionic
/// charge, mass,
/// </summary>
/// <param name="number">atomic number</param>
/// <param name="hydrogens">labelled hydrogen count</param>
/// <param name="mass">atomic mass</param>
/// <param name="charge">ionic formal charge</param>
/// <param name="unpaired">number of unpaired electrons</param>
/// <param name="position">placement of hydrogen</param>
/// <returns>laid out atom symbol</returns>
public AtomSymbol GeneratePeriodicSymbol(int number, int hydrogens, int mass, int charge, int unpaired, HydrogenPosition position)
{
var element = number == 0
? new TextOutline("*", font, emSize)
: new TextOutline(ChemicalElement.Of(number).Symbol, font, emSize);
var hydrogenAdjunct = defaultHydrogenLabel;
// the hydrogen count, charge, and mass adjuncts are script size
var hydrogenCount = new TextOutline(hydrogens.ToString(), font, emSize).Resize(scriptSize, scriptSize);
var chargeAdjunct = new TextOutline(ChargeAdjunctText(charge, unpaired), font, emSize).Resize(scriptSize, scriptSize);
var massAdjunct = new TextOutline(mass.ToString(), font, emSize).Resize(scriptSize, scriptSize);
// position each adjunct relative to the element label and each other
hydrogenAdjunct = PositionHydrogenLabel(position, element, hydrogenAdjunct);
hydrogenCount = PositionSubscript(hydrogenAdjunct, hydrogenCount);
chargeAdjunct = PositionChargeLabel(hydrogens, position, chargeAdjunct, element, hydrogenAdjunct);
massAdjunct = PositionMassLabel(massAdjunct, element);
// when the hydrogen label is positioned to the left we may need to nudge it
// over to account for the hydrogen count and/or the mass adjunct colliding
// with the element label
if (position == HydrogenPosition.Left)
{
var nudgeX = HydrogenXDodge(hydrogens, mass, element, hydrogenAdjunct, hydrogenCount, massAdjunct);
hydrogenAdjunct = hydrogenAdjunct.Translate(nudgeX, 0);
hydrogenCount = hydrogenCount.Translate(nudgeX, 0);
}
var adjuncts = new List <TextOutline>(4);
if (hydrogens > 0)
{
adjuncts.Add(hydrogenAdjunct);
}
if (hydrogens > 1)
{
adjuncts.Add(hydrogenCount);
}
if (charge != 0 || unpaired > 0)
{
adjuncts.Add(chargeAdjunct);
}
if (mass > 0)
{
adjuncts.Add(massAdjunct);
}
return(new AtomSymbol(element, adjuncts));
}
/// <summary>
/// Generate a formatted abbreviation AtomSymbol for the given Hydrogen position.
/// </summary>
/// <param name="tokens">the parsed tokens</param>
/// <param name="position">hydrogen position - determines if we reverse the label</param>
/// <returns>the generated symbol</returns>
public AtomSymbol GenerateAbbreviationSymbol(List <string> tokens, HydrogenPosition position)
{
if (position == HydrogenPosition.Left)
{
AbbreviationLabel.Reverse(tokens);
}
var tmpRefPoint = new TextOutline("H", font, emSize);
var fTexts = AbbreviationLabel.Format(tokens);
var italicFont = new Typeface(font.FontFamily, FontStyles.Italic, font.Weight, font.Stretch);
var outlines = new List <TextOutline>(fTexts.Count);
foreach (var fText in fTexts)
{
var outline = fText.Style == AbbreviationLabel.STYLE_ITALIC
? new TextOutline(fText.Text, italicFont, emSize)
: new TextOutline(fText.Text, font, emSize);
// resize and position scripts
if (fText.Style == AbbreviationLabel.STYLE_SUBSCRIPT)
{
outline = outline.Resize(scriptSize, scriptSize);
outline = PositionSubscript(tmpRefPoint, outline);
}
else if (fText.Style == AbbreviationLabel.STYLE_SUPSCRIPT)
{
outline = outline.Resize(scriptSize, scriptSize);
outline = PositionSuperscript(tmpRefPoint, outline);
}
outlines.Add(outline);
}
// position the outlines relative to each other
for (int i = 1; i < outlines.Count; i++)
{
var ref_ = outlines[i - 1];
var curr = outlines[i];
// charge aligns to symbol not a subscript part
if (fTexts[i].Style == AbbreviationLabel.STYLE_SUPSCRIPT &&
fTexts[i - 1].Style == AbbreviationLabel.STYLE_SUBSCRIPT && i > 1)
{
ref_ = outlines[i - 2];
}
outlines[i] = PositionAfter(ref_, curr);
}
// find symbol where we want to attach the bond
// this becomes the primary outline
int index;
if (position == HydrogenPosition.Left)
{
for (index = outlines.Count - 1; index >= 0; index--)
{
if ((fTexts[index].Style & 0x1) == 0)
{
break;
}
}
}
else
{
for (index = 0; index < outlines.Count; index++)
{
if ((fTexts[index].Style & 0x1) == 0)
{
break;
}
}
}
var primary = outlines[index];
outlines.RemoveAt(index);
return(new AtomSymbol(primary, outlines));
}
/// <summary>
/// Generates an atom symbol for a pseudo atom.
/// </summary>
/// <returns>the atom symbol</returns>
public AtomSymbol GeneratePseudoSymbol(string label, HydrogenPosition position)
{
var italicFont = new Typeface(font.FontFamily, FontStyles.Italic, FontWeights.Bold, font.Stretch);
var outlines = new List <TextOutline>(3);
int beg = 0;
int pos = 0;
int len = label.Length;
// upper case followed by lower case
while (pos < len && IsUpperCase(label[pos]))
{
pos++;
}
if (label[0] != 'R') // Ar is not A^r but 'Ra' is R^a etc
{
while (pos < len && IsLowerCase(label[pos]))
{
pos++;
}
}
if (pos > beg)
{
outlines.Add(new TextOutline(label.Substring(beg, pos), italicFont, emSize));
beg = pos;
// 2a etc.
while (pos < len && IsDigit(label[pos]))
{
pos++;
}
while (pos < len && IsLowerCase(label[pos]))
{
pos++;
}
if (pos > beg)
{
var outline = new TextOutline(label.Substring(beg, pos - beg), italicFont, emSize);
outline = outline.Resize(scriptSize, scriptSize);
outline = PositionSuperscript(outlines[0], outline);
outlines.Add(outline);
}
int numPrimes = 0;
while (pos < len)
{
switch (label[pos])
{
case '\'': numPrimes++; break;
case '`': numPrimes++; break;
case '‘': numPrimes++; break;
case '’': numPrimes++; break;
case '‛': numPrimes++; break;
case '“': numPrimes += 2; break;
case '”': numPrimes += 2; break;
case '′': numPrimes++; break;
case '″': numPrimes += 2; break;
case '‴': numPrimes += 3; break;
case '⁗': numPrimes += 4; break;
case '‵': numPrimes++; break;
case '‶': numPrimes += 2; break;
case '‷': numPrimes += 3; break;
case '´': numPrimes++; break;
case 'ˊ': numPrimes++; break;
case '́': numPrimes++; break;
case '˝': numPrimes += 2; break;
case '̋': numPrimes += 2; break;
default:
goto break_PRIMES;
}
pos++;
}
break_PRIMES:
if (pos < len)
{
return(new AtomSymbol(
new TextOutline(label, italicFont, emSize),
Array.Empty <TextOutline>()));
}
else
{
TextOutline outline = null;
var ref_ = outlines[outlines.Count - 1];
switch (numPrimes)
{
case 0: break;
case 1: outline = new TextOutline("′", font, emSize); break;
case 2: outline = new TextOutline("″", font, emSize); break;
case 3: outline = new TextOutline("‴", font, emSize); break;
default:
string lab = "";
while (numPrimes-- > 0)
{
lab += "′";
}
outline = new TextOutline(lab, font, emSize);
break;
}
if (outline != null)
{
if (outlines.Count > 1)
{
outline = outline.Resize(scriptSize, scriptSize);
}
outline = PositionSuperscript(ref_, outline);
outlines.Add(outline);
}
}
// line up text
for (int i = 1; i < outlines.Count; i++)
{
var ref_ = outlines[i - 1];
var curr = outlines[i];
outlines[i] = PositionAfter(ref_, curr);
}
return(new AtomSymbol(outlines[0], outlines.GetRange(1, outlines.Count - 1)));
}
else
{
return(new AtomSymbol(new TextOutline(label, italicFont, emSize), Array.Empty <TextOutline>()));
}
}