Atom Link(string value, ref int position, bool underline)
        {
            string meta  = ReadInsideBracket(value, ref position);
            string group = ReadGroup(value, ref position, leftGroupChar, rightGroupChar);

            return(AttrLinkAtom.Get(Parse(group).ExtractRoot(),
                                    meta ?? group.Trim(), underline));
        }
Esempio n. 2
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        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.");
        }