public override Box CreateBox(TexStyle style)
{
// Create result box.
var resultBox = HorizontalBox.Get();
Atom curAtom = null, prevAtom = null;
var resultPos = 0;
// Create and add box for each atom in row.
for (int i = 0; i < Elements.Count; i++)
{
curAtom = (Elements[i]);
// Create and add glue box, unless atom is first of row or previous/current atom is spaces.
if (prevAtom != null && !(prevAtom is SpaceAtom) && !(curAtom is SpaceAtom))
{
Box spaceBox = SpaceAtom.CreateGlueBox(prevAtom.GetRightType(), curAtom.GetLeftType(), style);
if (spaceBox != null)
{
resultBox.Add(spaceBox);
resultPos++;
}
}
// Create and add box for atom.
GenerateDelimiterBox(resultBox, ref i, ref resultPos, style);
//resultBox.Add(curBox);
prevAtom = curAtom;
}
return(resultBox);
}
Atom Matrix(string value, ref int position, bool vertical)
{
MatrixAtom matrixAtom = MatrixAtom.Get();
List <List <Atom> > childs = matrixAtom.Elements;
Atom parsedChild = (Parse(ReadGroup(
value, ref position, leftGroupChar, rightGroupChar)).ExtractRoot());
childs.Add(ListPool <Atom> .Get());
if (parsedChild == null)
{
MatrixAtom.Last(childs).Add(SpaceAtom.Get());
}
if (parsedChild is RowAtom)
{
List <Atom> el = ((RowAtom)parsedChild).Elements;
if (vertical)
{
MatrixAtom.ParseMatrixVertical(el, childs);
}
else
{
MatrixAtom.ParseMatrix(el, childs);
}
el.Clear();
ObjPool <RowAtom> .Release((RowAtom)parsedChild);
}
else
{
MatrixAtom.Last(childs).Add(parsedChild);
}
matrixAtom.Elements = childs;
return(matrixAtom);
}
Box CreateBoxDefault(TexStyle style, Box baseBox)
{
var factor = TexUtility.SizeFactor(style);
var clearance = TEXConfiguration.main.RootMargin * factor;
var lineThickness = TEXConfiguration.main.LineThickness * factor;
// Create box for radical sign.
var totalHeight = baseBox.totalHeight;
var radicalSignBox = DelimiterFactory.CreateBox(rootSymbol, totalHeight + clearance + lineThickness,
style);
// Add some clearance to left and right side
baseBox = HorizontalBox.Get(baseBox, baseBox.width + clearance * 2, TexAlignment.Center);
// Add half of excess height to clearance.
lineThickness = Mathf.Max(radicalSignBox.height, lineThickness);
clearance = radicalSignBox.totalHeight - totalHeight - lineThickness * 2;
// Create box for square-root containing base box.
TexUtility.CentreBox(radicalSignBox, style);
var overBar = OverBar.Get(baseBox, clearance, lineThickness);
TexUtility.CentreBox(overBar, style);
var radicalContainerBox = HorizontalBox.Get(radicalSignBox);
radicalContainerBox.Add(overBar);
// If atom is simple radical, just return square-root box.
if (DegreeAtom == null)
{
return(radicalContainerBox);
}
// Atom is complex radical (nth-root).
// Create box for root atom.
var rootBox = DegreeAtom.CreateBox(TexUtility.GetRootStyle());
var bottomShift = scale * (radicalContainerBox.height + radicalContainerBox.depth);
rootBox.shift = radicalContainerBox.depth - rootBox.depth - bottomShift;
// Create result box.
var resultBox = HorizontalBox.Get();
// Add box for negative kern.
var negativeKern = SpaceAtom.Get(-((radicalSignBox.width) / 2f), 0, 0).CreateBox(TexStyle.Display);
var xPos = rootBox.width + negativeKern.width;
if (xPos < 0)
{
resultBox.Add(StrutBox.Get(-xPos, 0, 0, 0));
}
resultBox.Add(rootBox);
resultBox.Add(negativeKern);
resultBox.Add(radicalContainerBox);
return(resultBox);
}
public static AccentedAtom Get(Atom baseAtom, string accentName)
{
var atom = ObjPool <AccentedAtom> .Get();
atom.BaseAtom = baseAtom ?? SpaceAtom.Get(0, 0, 0);
atom.AccentAtom = SymbolAtom.GetAtom(accentName);
return(atom);
}
public static AccentedAtom Get(Atom baseAtom, Atom accent)
{
var atom = ObjPool <AccentedAtom> .Get();
atom.BaseAtom = baseAtom ?? SpaceAtom.Get(0, 0, 0);
atom.AccentAtom = accent as SymbolAtom;
return(atom);
}
// the secret sauce begin here
public TexFormula Parse(string value)
{
if (value == null)
{
return(null);
}
var formula = ObjPool <TexFormula> .Get();
var position = 0;
while (position < value.Length)
{
char ch = value[position];
if (ch == '\r' || ch == '\0' || ch == '\x200c')
{
position++; // Skip chars that have zero width length
}
else if (IsWhiteSpace(ch))
{
formula.Add(AttachScripts(formula, value, ref position, SpaceAtom.Get()));
position++;
}
else if (ch == escapeChar)
{
ProcessEscapeSequence(formula, value, ref position);
}
else if (ch == leftGroupChar)
{
formula.Add(AttachScripts(formula, value, ref position, Parse(ReadGroup(value,
ref position, leftGroupChar, rightGroupChar)).ExtractRoot()));
}
else if (ch == rightGroupChar)
{
position++;
}
else if (ch == superScriptChar || ch == subScriptChar)
{
formula.Add(AttachScripts(formula, value, ref position, SpaceAtom.Get(0, TexUtility.spaceHeight, 0)));
}
else
{
var scriptsAtom = AttachScripts(formula, value, ref position,
ConvertCharacter(value, ref position, ch));
formula.Add(scriptsAtom);
}
}
if (formula.RootAtom == null && formula.AttachedMetaRenderer == null)
{
formula.Add(SpaceAtom.Get()); // a blank paragraph
}
return(formula);
}
public static AccentedAtom Get(Atom baseAtom, Atom accent)
{
var atom = ObjPool <AccentedAtom> .Get();
var rootSymbol = accent;
atom.AccentAtom = (SymbolAtom)rootSymbol;
atom.BaseAtom = baseAtom;
if (atom.BaseAtom == null)
{
atom.BaseAtom = SpaceAtom.Get(0, 0, 0);
}
return(atom);
}
public override Box CreateBox(TexStyle style)
{
// Create box for base atom.
var baseBox = BaseAtom == null ? StrutBox.Empty : BaseAtom.CreateBox(style);
// Create boxes for over and under atoms.
Box overBox = null, underBox = null;
var maxWidth = baseBox.width;
if (OverAtom != null)
{
overBox = OverAtom.CreateBox(OverScriptSmaller ? TexUtility.GetSuperscriptStyle(style) : style);
maxWidth = Mathf.Max(maxWidth, overBox.width);
}
if (UnderAtom != null)
{
underBox = UnderAtom.CreateBox(UnderScriptSmaller ? TexUtility.GetSubscriptStyle(style) : style);
maxWidth = Mathf.Max(maxWidth, underBox.width);
}
// Create result box.
var resultBox = VerticalBox.Get();
// Create and add box for over atom.
if (OverAtom != null)
{
resultBox.Add(ChangeWidth(overBox, maxWidth));
resultBox.Add(TexUtility.GetBox(SpaceAtom.Get(0, OverSpace, 0), style));
}
// Add box for base atom.
resultBox.Add(ChangeWidth(baseBox, maxWidth));
float totalHeight = resultBox.height + resultBox.depth - baseBox.depth;
// Create and add box for under atom.
if (UnderAtom != null)
{
resultBox.Add(TexUtility.GetBox(SpaceAtom.Get(0, UnderSpace, 0), style));
resultBox.Add(ChangeWidth(underBox, maxWidth));
}
resultBox.depth = resultBox.height + resultBox.depth - totalHeight;
resultBox.height = totalHeight;
return(resultBox);
}
Atom Table(string value, ref int position, int align, int h, int v, bool vertical)
{
List <List <Atom> > childs = new List <List <Atom> >();
MatrixAtom matrixAtom = ObjPool <MatrixAtom> .Get();
matrixAtom.horizontalAlign = align;
matrixAtom.horizontalLine = h;
matrixAtom.verticalLine = v;
Atom parsedChild = (Parse(ReadGroup(
value, ref position, leftGroupChar, rightGroupChar)).ExtractRoot());
childs.Add(ListPool <Atom> .Get());
if (parsedChild == null)
{
MatrixAtom.Last(childs).Add(SpaceAtom.Get());
}
if (parsedChild is RowAtom)
{
List <Atom> el = ((RowAtom)parsedChild).Elements;
if (!vertical)
{
MatrixAtom.ParseMatrix(el, childs);
}
else
{
MatrixAtom.ParseMatrixVertical(el, childs);
}
el.Clear();
ObjPool <RowAtom> .Release((RowAtom)parsedChild);
}
else
{
MatrixAtom.Last(childs).Add(parsedChild);
}
matrixAtom.Elements = childs;
return(matrixAtom);
}
private Atom ProcessCommand(TexFormula formula, string value, ref int position, string command)
{
SkipWhiteSpace(value, ref position);
if (position == value.Length)
{
return(null);
}
switch (command)
{
case "meta":
// Command is meta
var metaRule = formula.AttachedMetaRenderer;
if (metaRule == null)
{
metaRule = formula.AttachedMetaRenderer = ObjPool <TexMetaRenderer> .Get();
}
else
{
metaRule.Reset();
}
string metaPar = null;
if (value[position] == leftBracketChar)
{
metaPar = ReadGroup(value, ref position, leftBracketChar, rightBracketChar);
SkipWhiteSpace(value, ref position);
metaRule.ParseString(metaPar);
}
return(null);
case "root":
case "sqrt":
// Command is radical.
TexFormula degreeFormula = null;
if (value[position] == leftBracketChar)
{
degreeFormula = Parse(ReadGroup(value, ref position, leftBracketChar, rightBracketChar));
SkipWhiteSpace(value, ref position);
}
return(Radical.Get(Parse(ReadGroup(value, ref position, leftGroupChar, rightGroupChar))
.GetRoot, degreeFormula == null ? null : degreeFormula.GetRoot));
case "vmatrix":
case "matrix":
//Command is Matrix
MatrixAtom matrixAtom = MatrixAtom.Get();
List <List <Atom> > childs = matrixAtom.Elements;
Atom parsedChild = (Parse(ReadGroup(
value, ref position, leftGroupChar, rightGroupChar)).GetRoot);
childs.Add(ListPool <Atom> .Get());
if (parsedChild == null)
{
MatrixAtom.Last(childs).Add(SpaceAtom.Get());
}
if (parsedChild is RowAtom)
{
List <Atom> el = ((RowAtom)parsedChild).Elements;
if (command == "matrix")
{
MatrixAtom.ParseMatrix(el, childs);
}
else
{
MatrixAtom.ParseMatrixVertical(el, childs);
}
el.Clear();
ObjPool <RowAtom> .Release((RowAtom)parsedChild);
}
else
{
MatrixAtom.Last(childs).Add(parsedChild);
}
matrixAtom.Elements = childs;
return(matrixAtom);
case "math":
case "text":
var idx = TexUtility.RawRenderFont < 0 ? TEXConfiguration.main.Typeface_Text : -2;
var style = TexUtility.RenderFontStyle;
if (value[position] == leftBracketChar)
{
var str = ReadGroup(value, ref position, leftBracketChar, rightBracketChar);
if (!int.TryParse(str, out idx))
{
idx = TexUtility.RawRenderFont < 0 ? TEXConfiguration.main.Typeface_Text : -2;
style = ParseFontStyle(str);
}
SkipWhiteSpace(value, ref position);
}
else if (command == "math")
{
idx = -1;
}
var oldType = TexUtility.RenderFont;
var oldStyle = TexUtility.RenderFontStyle;
TexUtility.RenderFont = idx;
TexUtility.RenderFontStyle = style;
var parsed = Parse(ReadGroup(value, ref position, leftGroupChar, rightGroupChar)).GetRoot;
TexUtility.RenderFont = oldType;
TexUtility.RenderFontStyle = oldStyle;
return(parsed);
case "clr":
case "mclr":
case "color":
// Command is color
string clr = null;
if (value[position] == leftBracketChar)
{
clr = ReadGroup(value, ref position, leftBracketChar, rightBracketChar);
SkipWhiteSpace(value, ref position);
}
if (position == value.Length)
{
return(null);
}
AttrColorAtom endColor;
var startColor = AttrColorAtom.Get(clr, command == "color" ? 1 : (command == "clr" ? 0 : 2), out endColor);
return(InsertAttribute(Parse(ReadGroup(value, ref position, leftGroupChar, rightGroupChar)).GetRoot, startColor, endColor));
case "bg":
case "vbg":
if (value[position] == leftBracketChar)
{
clr = ReadGroup(value, ref position, leftBracketChar, rightBracketChar);
SkipWhiteSpace(value, ref position);
}
else
{
clr = null;
}
return(AttrBgAtom.Get(Parse(ReadGroup(value, ref position, leftGroupChar, rightGroupChar))
.GetRoot, clr, command == "bg"));
case "size":
// Command is size
string sz = null;
if (value[position] == leftBracketChar)
{
sz = ReadGroup(value, ref position, leftBracketChar, rightBracketChar);
SkipWhiteSpace(value, ref position);
}
if (position == value.Length)
{
return(null);
}
return(AttrSizeAtom.Get(Parse(ReadGroup(value, ref position, leftGroupChar, rightGroupChar))
.GetRoot, sz));
case "link":
case "ulink":
// Command is Link
string meta = null;
if (value[position] == leftBracketChar)
{
meta = ReadGroup(value, ref position, leftBracketChar, rightBracketChar);
SkipWhiteSpace(value, ref position);
}
if (position == value.Length)
{
return(null);
}
string groupBrack = ReadGroup(value, ref position, leftGroupChar, rightGroupChar);
if (meta == null)
{
meta = groupBrack;
}
return(AttrLinkAtom.Get(Parse(groupBrack).GetRoot, meta, command == "ulink"));
case "under":
command = "anot";
break;
case "over":
command = "bnot";
break;
}
if (command.Length > 2 && command.Substring(command.Length - 3) == "not")
{
int NotMode = 0;
bool UseMargin = true;
string prefix = command.Substring(0, command.Length - 3);
if (prefix.Length > 0)
{
switch (prefix[0])
{
case 'n':
NotMode = 1;
break;
case 'h':
NotMode = 2;
break;
case 'd':
NotMode = 3;
break;
case 'u':
NotMode = 4;
break;
case 'o':
NotMode = 5;
break;
case 'v':
if (prefix.Length > 1 && prefix[1] == 'n')
{
NotMode = 7;
}
else
{
NotMode = 6;
}
break;
case 'a':
NotMode = 4;
UseMargin = false;
break;
case 'b':
NotMode = 5;
UseMargin = false;
break;
}
}
if (position == value.Length)
{
return(null);
}
string sz = null;
if (value[position] == leftBracketChar)
{
sz = ReadGroup(value, ref position, leftBracketChar, rightBracketChar);
SkipWhiteSpace(value, ref position);
}
return(NegateAtom.Get(Parse(ReadGroup(value, ref position, leftGroupChar, rightGroupChar))
.GetRoot, NotMode, sz, UseMargin));
}
if (command.Length > 2 && command.Substring(command.Length - 3) == "trs")
{
int PivotMode = 0;
string prefix = command.Substring(0, command.Length - 3);
if (prefix.Length > 0)
{
switch (prefix[0])
{
case 'm':
PivotMode = 1;
break;
case 'l':
PivotMode = 2;
break;
}
}
if (position == value.Length)
{
return(null);
}
string trs = null;
if (value[position] == leftBracketChar)
{
trs = ReadGroup(value, ref position, leftBracketChar, rightBracketChar);
SkipWhiteSpace(value, ref position);
}
AttrTransformationAtom endTRS;
var startTRS = AttrTransformationAtom.Get(trs, PivotMode, out endTRS);
return(InsertAttribute(Parse(ReadGroup(value, ref position, leftGroupChar, rightGroupChar)).GetRoot, startTRS, endTRS));
}
if (command.Length > 3 && command.Substring(command.Length - 4) == "frac")
{
int FracAlignT = 0, FracAlignB = 0;
bool FracAlignN = true;
string prefix = command.Substring(0, command.Length - 4);
if (prefix.Length > 0)
{
if (prefix[0] == 'n')
{
FracAlignN = false;
prefix = prefix.Substring(1);
}
if (prefix.Length == 1)
{
FracAlignT = fracP(prefix[0]);
FracAlignB = FracAlignT;
}
else if (prefix.Length == 2)
{
FracAlignT = fracP(prefix[0]);
FracAlignB = fracP(prefix[1]);
}
}
if (position == value.Length)
{
return(null);
}
Atom numeratorFormula = null, denominatorFormula = null;
numeratorFormula = Parse(ReadGroup(value, ref position, leftGroupChar, rightGroupChar)).GetRoot;
SkipWhiteSpace(value, ref position);
if (position != value.Length)
{
denominatorFormula = Parse(ReadGroup(value, ref position, leftGroupChar, rightGroupChar)).GetRoot;
}
return(FractionAtom.Get(numeratorFormula, denominatorFormula, FracAlignN,
(TexAlignment)FracAlignT, (TexAlignment)FracAlignB));
}
if (command.Length > 3 && command.Substring(command.Length - 4) == "hold")
{
TexAlignment align = TexAlignment.Center;
bool isVertical = false;
string prefix = command.Substring(0, command.Length - 3);
if (prefix.Length > 0)
{
switch (prefix[0])
{
case 'v':
isVertical = true;
break;
case 'l':
align = TexAlignment.Left;
break;
case 'r':
align = TexAlignment.Right;
break;
case 'b':
align = TexAlignment.Bottom;
goto case 'v';
case 't':
align = TexAlignment.Top;
goto case 'v';
}
}
Vector2 sz = Vector2.zero;
if (position < value.Length && value[position] == leftBracketChar)
{
var frag = ReadGroup(value, ref position, leftBracketChar, rightBracketChar);
int idx = frag.IndexOf(',');
if (idx >= 0)
{
var fragL = frag.Substring(0, idx);
var fragR = frag.Substring(idx + 1);
float.TryParse(fragL, out sz.x);
float.TryParse(fragR, out sz.y);
}
else
{
if (isVertical)
{
float.TryParse(frag, out sz.y);
}
else
{
float.TryParse(frag, out sz.x);
}
}
SkipWhiteSpace(value, ref position);
}
if (position < value.Length && value[position] == leftGroupChar)
{
return(HolderAtom.Get(Parse(ReadGroup(value, ref position, leftGroupChar, rightGroupChar))
.GetRoot, sz.x, sz.y, align));
}
else
{
return(HolderAtom.Get(null, sz.x, sz.y, align));
}
}
if (command.Length > 4 && command.Substring(command.Length - 5) == "table")
{
bool vertical = false;
int align = 1 + 8 + 64;
string prefix = command.Substring(0, command.Length - 5);
if (prefix.Length > 0)
{
if (prefix[0] == 'v')
{
vertical = true;
prefix = prefix.Substring(1);
}
if (prefix.Length == 1)
{
var pref = fracP(prefix[0]);
align = Math.Max(1, pref * 2) + Math.Max(8, pref * 16) + Math.Max(64, pref * 128);
}
else if (prefix.Length == 3)
{
var pref0 = fracP(prefix[0]);
var pref1 = fracP(prefix[1]);
var pref2 = fracP(prefix[2]);
align = Math.Max(1, pref0 * 2) + Math.Max(8, pref1 * 16) + Math.Max(64, pref2 * 128);
}
}
int lineStyleH = 0, lineStyleV = 0;
if (value[position] == leftBracketChar)
{
string lineOpt;
int lineP = 0;
lineOpt = ReadGroup(value, ref position, leftBracketChar, rightBracketChar);
for (int i = 0; i < lineOpt.Length; i++)
{
if (!int.TryParse(lineOpt[i].ToString(), out lineP))
{
continue;
}
if (i >= 6)
{
break;
}
switch (i)
{
case 0:
lineStyleH += lineP >= 2 ? 17 : lineP;
break;
case 1:
lineStyleH += lineP >= 2 ? 10 : (lineP == 1 ? 2 : 0);
break;
case 2:
lineStyleH += lineP >= 1 ? 4 : 0;
break;
case 3:
lineStyleV += lineP >= 2 ? 17 : lineP;
break;
case 4:
lineStyleV += lineP >= 2 ? 10 : (lineP == 1 ? 2 : 0);
break;
case 5:
lineStyleV += lineP >= 1 ? 4 : 0;
break;
}
}
SkipWhiteSpace(value, ref position);
}
else
{
lineStyleH = 7;
lineStyleV = 7;
}
List <List <Atom> > childs = new List <List <Atom> >();
MatrixAtom matrixAtom = ObjPool <MatrixAtom> .Get();
matrixAtom.horizontalAlign = align;
matrixAtom.horizontalLine = lineStyleH;
matrixAtom.verticalLine = lineStyleV;
Atom parsedChild = (Parse(ReadGroup(
value, ref position, leftGroupChar, rightGroupChar)).GetRoot);
childs.Add(ListPool <Atom> .Get());
if (parsedChild == null)
{
MatrixAtom.Last(childs).Add(SpaceAtom.Get());
}
if (parsedChild is RowAtom)
{
List <Atom> el = ((RowAtom)parsedChild).Elements;
if (!vertical)
{
MatrixAtom.ParseMatrix(el, childs);
}
else
{
MatrixAtom.ParseMatrixVertical(el, childs);
}
el.Clear();
ObjPool <RowAtom> .Release((RowAtom)parsedChild);
}
else
{
MatrixAtom.Last(childs).Add(parsedChild);
}
matrixAtom.Elements = childs;
return(matrixAtom);
}
throw new TexParseException("Invalid command.");
}