private void RegisterTexFont(TexFormula formula, string value, ref int position, TexFont font)
{
SkipWhiteSpace(value, ref position);
if (position == value.Length)
{
return;
}
var style = TexUtility.RenderFontStyle;
if (value [position] == leftBracketChar)
{
style = ParseFontStyle(ReadGroup(value, ref position, leftBracketChar, rightBracketChar));
SkipWhiteSpace(value, ref position);
}
var oldType = TexUtility.RenderFont;
var oldStyle = TexUtility.RenderFontStyle;
TexUtility.RenderFont = font.index;
TexUtility.RenderFontStyle = style;
var parsed = Parse(ReadGroup(value, ref position, leftGroupChar, rightGroupChar)).GetRoot;
TexUtility.RenderFont = oldType;
TexUtility.RenderFontStyle = oldStyle;
formula.Add(parsed);
}
private void ProcessEscapeSequence(TexFormula formula, string value, ref int position)
{
position++;
var command = LookForAWord(value, ref position);
// Check if there's no command
if (command.Length == 0)
{
if (position < value.Length)
{
var nextChar = value[position];
if (IsParserReserved(nextChar))
{
formula.Add(ConvertCharacter(value, ref position, nextChar));
}
}
return;
}
//Check if the command registered in Commands
if (isCommandRegistered(command))
{
formula.Add(AttachScripts(formula, value, ref position,
ProcessCommand(formula, value, ref position, command)));
return;
}
//Check if the command registered in FontID
var fontID = TEXPreference.main.GetFontIndexByID(command);
if (fontID != -1)
{
SkipWhiteSpace(value, ref position);
formula.Add(ParseFontStyle(value, ref position, fontID,
ParseFontStyle(ReadInsideBracket(value, ref position))));
return;
}
SymbolAtom symbolAtom = SymbolAtom.GetAtom(command);
//Check if the command registered in Symbol database
if (symbolAtom != null)
{
// Symbol was found.
if (symbolAtom.RightType == CharType.Accent && formula.RootAtom != null)
{
//Accent is Found
Atom baseAtom = formula.RootAtom;
if (baseAtom is RowAtom)
{
var row = (RowAtom)baseAtom;
baseAtom = MatrixAtom.Last(row.Elements);
row.Elements.RemoveAt(row.Elements.Count - 1);
}
else
{
formula.RootAtom = null;
}
formula.Add(AttachScripts(formula, value, ref position, AccentedAtom.Get(baseAtom, symbolAtom)));
}
else
{
formula.Add(AttachScripts(formula, value, ref position, symbolAtom));
}
return;
}
//No lucks, now ...
{
// Command aren't defined, use it as command text style
RowAtom row = RowAtom.Get();
for (int i = 0; i < command.Length; i++)
{
var charAtom = CharAtom.Get(command[i],
TEXConfiguration.main.Typeface_Commands);
row.Add(charAtom);
}
formula.Add(AttachScripts(formula, value, ref position, row));
}
}
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":
return(Meta(formula, value, ref position));
case "root":
case "sqrt":
return(Root(formula, value, ref position));
case "vmatrix":
case "matrix":
return(Matrix(value, ref position, command == "vmatrix"));
case "style":
case "math":
case "text":
var idx = command == "text" ? TEXConfiguration.main.Typeface_Text : (command == "math" ? -1 : -2);
var style = ParseStyle(value, ref position);
formula.Add(ParseFontStyle(value, ref position, idx, style), true);
return(null); // add by not making a separate block (hence wrappable).
case "clr":
case "mclr":
case "color":
formula.Add(Color(value, ref position, command == "color" ? 1 : (command == "clr" ? 0 : 2)), true);
return(null); // same reason with \style.
case "bg":
case "vbg":
return(BgColor(value, ref position, command == "bg"));
case "size":
return(Size(value, ref position));
case "link":
case "ulink":
case "vlink":
return(Link(value, ref position, command == "ulink", command != "vlink"));
case "trs":
case "mtrs":
case "ltrs":
return(TRS(value, ref position, command == "trs" ? 0 : (command == "mtrs" ? 1 : 2)));
case "under":
case "over":
return(Not(value, ref position, command == "under" ? 4 : 5, false));
case "border":
case "vborder":
return(Border(value, ref position, command == "border"));
}
if (NotFamily.Contains(command))
{
return(Not(value, ref position, ParseNotMode(command[0], command[1]), true));
}
if (FracFamily.Contains(command))
{
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]);
}
}
return(Frac(value, ref position, FracAlignN, (TexAlignment)FracAlignT, (TexAlignment)FracAlignB));
}
if (HoldFamily.Contains(command))
{
TexAlignment align = TexAlignment.Center;
bool vertical = false;
holdP(command.Substring(0, command.Length - 3), ref vertical, ref align);
string size = ReadInsideBracket(value, ref position);
if (position < value.Length && value[position] == leftGroupChar)
{
return(HolderAtom.Get(Parse(ReadGroup(value, ref position, leftGroupChar, rightGroupChar))
.ExtractRoot(), size, vertical, align));
}
else
{
return(HolderAtom.Get(null, size, vertical, align));
}
}
if (TableFamily.Contains(command))
{
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;
}
return(Table(value, ref position, align, lineStyleH, lineStyleV, vertical));
}
throw new TexParseException("Invalid command.");
}