public ViewResult Edit(int NodeID)
{
Session["formula"] = "<math xmlns=" + '"' + "http://www.w3.org/1998/Math/MathML" + '"' + " display='inline'> </math>";
Session["undo"] = Session["formula"];
Session["ident"] = null;
Session["oper"] = null;
Session["num"] = null;
Session["space"] = null;
Session["text"] = null;
FormulaEditViewModel model = new FormulaEditViewModel
{
NodeID = NodeID,
ClearFormula = false,
BothIdent = false,
BoldIdent = false,
Ident1 = "",
Ident2 = "",
Oper1 = "",
Oper2 = "",
BothOper = false,
Num1 = "",
Num2 = "",
Space = "",
BoldText = false,
Text = "",
Insert = "Identifier",
Target = "Append",
Block = "inline",
Algebraic = "None",
Calculus = "None",
Ellipses = "None",
Logic = "None",
Vector = "None",
GreekUpper = "None",
GreekLower = "None"
};
return(View(model));
}
public ViewResult Edit(FormulaEditViewModel form, bool undo = false)
{
string searchfor = " </math>";
bool insert = true;
StringBuilder sb;
if (ModelState.IsValid)
{
if (undo)
{
sb = new StringBuilder((string)Session["undo"]);
}
else
{
sb = new StringBuilder((string)Session["formula"]);
}
if (form.ClearFormula)
{
Session["formula"] = "<math xmlns=" + '"' + "http://www.w3.org/1998/Math/MathML" + '"' + " display='inline'> </math>";
Session["undo"] = Session["formula"];
Session["ident"] = form.Ident1;
Session["oper"] = form.Oper1;
Session["num"] = form.Num1;
Session["space"] = form.Space;
Session["text"] = form.Text;
sb = new StringBuilder((string)Session["formula"]);
form.BothIdent = false;
form.BoldIdent = false;
form.Ident1 = "";
form.Ident2 = "";
form.Oper1 = "";
form.Oper2 = "";
form.BothOper = false;
form.Num1 = "";
form.Num2 = "";
form.Space = "";
form.BoldText = false;
form.Text = "";
form.Insert = "Identifier";
form.Target = "Append";
form.Block = "inline";
form.Algebraic = "None";
form.Calculus = "None";
form.Ellipses = "None";
form.Logic = "None";
form.Vector = "None";
form.GreekUpper = "None";
form.GreekLower = "None";
}
else
{
switch (form.Block)
{
case "Block":
if (sb.ToString().IndexOf("inline") > 0)
{
sb.Replace("inline", "block");
insert = false;
}
break;
case "Inline":
if (sb.ToString().IndexOf("block") > 0)
{
sb.Replace("block", "inline");
insert = false;
}
break;
default:
break;
}
switch (form.Target)
{
case "Append":
searchfor = " </math>";
insert = true;
break;
case "Numerator":
searchfor = " #numerator";
insert = true;
break;
case "Denominator":
searchfor = " #denominator";
insert = true;
break;
case "Subscript Row":
searchfor = " #subrow";
insert = true;
break;
case "Subscript Row2":
searchfor = " #subrow2";
insert = true;
break;
case "Superscript Row":
searchfor = " #suprow";
insert = true;
break;
case "Superscript Row2":
searchfor = " #suprow2";
insert = true;
break;
case "Square Root Row":
searchfor = " #sqrtrow";
insert = true;
break;
case "Root Row":
searchfor = " #rootrow";
insert = true;
break;
case "Over Row":
searchfor = " #overrow";
insert = true;
break;
case "Under Row":
searchfor = " #underrow";
insert = true;
break;
case "Row":
searchfor = " #row";
insert = true;
break;
case "Clear Numerator":
if (sb.ToString().Contains("#numerator"))
{
sb.Remove(sb.ToString().IndexOf("#numerator"), 10);
}
;
insert = false;
form.Target = "Denominator";
form.Insert = "Number";
break;
case "Clear Denominator":
if (sb.ToString().Contains("#denominator"))
{
sb.Remove(sb.ToString().IndexOf("#denominator"), 12);
}
;
insert = false;
form.Insert = "Operator";
break;
case "Clear Subscript Row":
if (sb.ToString().Contains("#subrow"))
{
sb.Remove(sb.ToString().IndexOf("#subrow"), 7);
}
;
if (sb.ToString().Contains("#subrow2"))
{
form.Target = "Subscript Row2";
}
;
insert = false;
form.Insert = "Operator";
break;
case "Clear Subscript Row2":
if (sb.ToString().Contains("#subrow2"))
{
sb.Remove(sb.ToString().IndexOf("#subrow2"), 8);
}
;
insert = false;
form.Insert = "Operator";
break;
case "Clear Superscript Row":
if (sb.ToString().Contains("#suprow"))
{
sb.Remove(sb.ToString().IndexOf("#suprow"), 7);
}
;
if (sb.ToString().Contains("#suprow2"))
{
form.Target = "Superscript Row2";
}
;
insert = false;
form.Insert = "Operator";
break;
case "Clear Superscript Row2":
if (sb.ToString().Contains("#suprow2"))
{
sb.Remove(sb.ToString().IndexOf("#suprow2"), 8);
}
;
insert = false;
form.Insert = "Operator";
break;
case "Clear Square Root Row":
if (sb.ToString().Contains("#sqrtrow"))
{
sb.Remove(sb.ToString().IndexOf("#sqrtrow"), 8);
}
;
insert = false;
form.Insert = "Operator";
break;
case "Clear Root Row":
if (sb.ToString().Contains("#rootrow"))
{
sb.Remove(sb.ToString().IndexOf("#rootrow"), 8);
}
;
insert = false;
form.Insert = "Operator";
break;
case "Clear Over Row":
if (sb.ToString().Contains("#overrow"))
{
sb.Remove(sb.ToString().IndexOf("#overrow"), 8);
}
;
insert = false;
form.Insert = "Operator";
break;
case "Clear Under Row":
if (sb.ToString().Contains("#underrow"))
{
sb.Remove(sb.ToString().IndexOf("#underrow"), 9);
}
;
insert = false;
form.Target = "Over Row";
form.Insert = "Number";
break;
case "Clear Row":
if (sb.ToString().Contains("#row"))
{
sb.Remove(sb.ToString().IndexOf("#row"), 4);
}
;
insert = false;
form.Insert = "Operator";
break;
default:
searchfor = " </math>";
insert = true;
break;
}
if (undo)
{
insert = false;
}
if (insert)
{
if (form.Algebraic != "None")
{
form.Oper1 = "&" + form.Algebraic;
form.Algebraic = "None";
}
if (form.Calculus != "None")
{
if (form.Calculus == "∞")
{
form.Num1 = "&" + "infin;";
form.Insert = "Number";
form.Calculus = "None";
}
else
{
form.Oper1 = "&" + form.Calculus;
form.Calculus = "None";
}
}
if (form.Ellipses != "None")
{
form.Oper1 = "&" + form.Ellipses;
form.Insert = "Operator";
form.Ellipses = "None";
}
if (form.Logic != "None")
{
form.Oper1 = "&" + form.Logic;
form.Insert = "Operator";
form.Logic = "None";
}
if (form.Vector != "None")
{
form.Oper1 = "&" + form.Vector;
form.Insert = "Operator";
form.Vector = "None";
}
if (form.GreekUpper != "None")
{
form.Ident1 = "&" + form.GreekUpper;
form.Insert = "Identifier";
form.GreekUpper = "None";
}
if (form.GreekLower != "None")
{
form.Ident1 = "&" + form.GreekLower;
form.Insert = "Identifier";
form.GreekLower = "None";
}
if (form.Insert == "Identifier" || form.Insert == "Operator" || form.Insert == "Number")
{
if (form.Ident1 != (string)Session["ident"])
{
form.Insert = "Identifier";
Session["ident"] = form.Ident1;
}
if (form.Oper1 != (string)Session["oper"])
{
form.Insert = "Operator";
Session["oper"] = form.Oper1;
}
if (form.Num1 != (string)Session["num"])
{
form.Insert = "Number";
Session["num"] = form.Num1;
}
if (form.Space != (string)Session["space"])
{
form.Insert = "Space";
Session["space"] = form.Space;
}
if (form.Text != (string)Session["text"])
{
form.Insert = "Text";
Session["text"] = form.Text;
}
}
switch (form.Insert)
{
case "Identifier":
if (sb.ToString().Contains(searchfor))
{
if (form.BothNum)
{
sb.Insert(sb.ToString().IndexOf(searchfor), " <mn>" + form.Num1 + "</mn>");
Session["num"] = form.Num1;
}
if (!form.BothIdent)
{
if (form.BoldIdent)
{
sb.Insert(sb.ToString().IndexOf(searchfor), " <mi mathvariant='bold'>" + form.Ident1 + "</mi>");
Session["ident"] = form.Ident1;
}
else
{
sb.Insert(sb.ToString().IndexOf(searchfor), " <mi>" + form.Ident1 + "</mi>");
Session["ident"] = form.Ident1;
}
}
else
{
if (form.BoldIdent)
{
sb.Insert(sb.ToString().IndexOf(searchfor), " <mi mathvariant='bold'>" + form.Ident1 + "</mi> <mi mathvariant='bold'>" + form.Ident2 + "</mi>");
Session["ident"] = form.Ident1;
}
else
{
sb.Insert(sb.ToString().IndexOf(searchfor), " <mi>" + form.Ident1 + "</mi> <mi>" + form.Ident2 + "</mi>");
Session["ident"] = form.Ident1;
}
}
}
form.Insert = "Operator";
break;
case "Operator":
if (!form.BothOper && sb.ToString().Contains(searchfor))
{
sb.Insert(sb.ToString().IndexOf(searchfor), " <mo>" + form.Oper1 + "</mo>");
Session["oper"] = form.Oper1;
}
if (form.BothOper && sb.ToString().Contains(searchfor))
{
sb.Insert(sb.ToString().IndexOf(searchfor), " <mo>" + form.Oper1 + "</mo> <mo>" + form.Oper2 + "</mo>");
Session["oper"] = form.Oper1;
}
form.Insert = "Identifier";
break;
case "Number":
if (sb.ToString().Contains(searchfor))
{
sb.Insert(sb.ToString().IndexOf(searchfor), " <mn>" + form.Num1 + "</mn>");
Session["num"] = form.Num1;
}
form.Insert = "Operator";
break;
case "Subscript (Identifier, Number)":
if (form.BothNum && sb.ToString().Contains(searchfor))
{
sb.Insert(sb.ToString().IndexOf(searchfor), " <mn>" + form.Num2 + "</mn>");
}
if (form.BoldIdent && sb.ToString().Contains(searchfor))
{
sb.Insert(sb.ToString().IndexOf(searchfor), " <msub> <mi mathvariant='bold'>" + form.Ident1 + "</mi> <mn>" + form.Num1 + "</mn> </msub>");
Session["ident"] = form.Ident1;
Session["num"] = form.Num1;
}
else
{
sb.Insert(sb.ToString().IndexOf(searchfor), " <msub> <mi>" + form.Ident1 + "</mi> <mn>" + form.Num1 + "</mn> </msub>");
Session["ident"] = form.Ident1;
Session["num"] = form.Num1;
}
form.Insert = "Operator";
break;
case "Subscript (Identifier, Identifier)":
if (form.BothNum && sb.ToString().Contains(searchfor))
{
sb.Insert(sb.ToString().IndexOf(searchfor), " <mn>" + form.Num1 + "</mn>");
Session["num"] = form.Num1;
}
if (form.BoldIdent && sb.ToString().Contains(searchfor))
{
sb.Insert(sb.ToString().IndexOf(searchfor), " <msub> <mi mathvariant='bold'>" + form.Ident1 + "</mi> <mi mathvariant='bold'>" + form.Ident2 + "</mi> </msub>");
Session["ident"] = form.Ident1;
}
else
{
sb.Insert(sb.ToString().IndexOf(searchfor), " <msub> <mi>" + form.Ident1 + "</mi> <mi>" + form.Ident2 + "</mi> </msub>");
Session["ident"] = form.Ident1;
}
form.Insert = "Operator";
break;
case "Subscript (Identifier, Row)":
if (form.BothNum && sb.ToString().Contains(searchfor))
{
sb.Insert(sb.ToString().IndexOf(searchfor), " <mn>" + form.Num1 + "</mn>");
Session["num"] = form.Num1;
}
if (form.BoldIdent && sb.ToString().Contains(searchfor))
{
sb.Insert(sb.ToString().IndexOf(searchfor), " <msub> <mi mathvariant='bold'>" + form.Ident1 + "</mi> <mrow> #subrow </mrow> </msub>");
Session["ident"] = form.Ident1;
}
else
{
sb.Insert(sb.ToString().IndexOf(searchfor), " <msub> <mi>" + form.Ident1 + "</mi> <mrow> #subrow </mrow> </msub>");
Session["ident"] = form.Ident1;
}
form.Target = "Subscript Row";
form.Insert = "Identifier";
break;
case "Subscript (Row, Identifier)":
if (form.BothNum && sb.ToString().Contains(searchfor))
{
sb.Insert(sb.ToString().IndexOf(searchfor), " <mn>" + form.Num1 + "</mn>");
Session["num"] = form.Num1;
}
if (form.BoldIdent && sb.ToString().Contains(searchfor))
{
sb.Insert(sb.ToString().IndexOf(searchfor), " <msub> <mrow> #subrow </mrow> <mi mathvariant='bold'>" + form.Ident1 + "</mi> </msub>");
Session["ident"] = form.Ident1;
}
else
{
sb.Insert(sb.ToString().IndexOf(searchfor), " <msub> <mrow> #subrow </mrow> <mi>" + form.Ident1 + "</mi> </msub>");
Session["ident"] = form.Ident1;
}
form.Target = "Subscript Row";
form.Insert = "Identifier";
break;
case "Subscript (Row, Number)":
if (form.BothNum && sb.ToString().Contains(searchfor))
{
sb.Insert(sb.ToString().IndexOf(searchfor), " <mn>" + form.Num2 + "</mn>");
}
if (sb.ToString().Contains(searchfor))
{
sb.Insert(sb.ToString().IndexOf(searchfor), " <msub> <mrow> #subrow </mrow> <mn>" + form.Num1 + "</mn> </msub>");
Session["num"] = form.Num1;
}
form.Target = "Subscript Row";
form.Insert = "Identifier";
break;
case "Subscript (Row, Row)":
if (form.BothNum && sb.ToString().Contains(searchfor))
{
sb.Insert(sb.ToString().IndexOf(searchfor), " <mn>" + form.Num1 + "</mn>");
Session["num"] = form.Num1;
}
if (sb.ToString().Contains(searchfor))
{
sb.Insert(sb.ToString().IndexOf(searchfor), " <msub> <mrow> #subrow </mrow> <mrow> #subrow2 </mrow> </msub>");
}
form.Target = "Subscript Row";
form.Insert = "Identifier";
break;
case "Superscript (Identifier, Number)":
if (form.BothNum && sb.ToString().Contains(searchfor))
{
sb.Insert(sb.ToString().IndexOf(searchfor), " <mn>" + form.Num2 + "</mn>");
}
if (form.BoldIdent && sb.ToString().Contains(searchfor))
{
sb.Insert(sb.ToString().IndexOf(searchfor), " <msup> <mi mathvariant='bold'>" + form.Ident1 + "</mi> <mn>" + form.Num1 + "</mn> </msup>");
Session["ident"] = form.Ident1;
Session["num"] = form.Num1;
}
else
{
sb.Insert(sb.ToString().IndexOf(searchfor), " <msup> <mi>" + form.Ident1 + "</mi> <mn>" + form.Num1 + "</mn> </msup>");
Session["ident"] = form.Ident1;
Session["num"] = form.Num1;
}
form.Insert = "Operator";
break;
case "Superscript (Identifier, Identifier)":
if (form.BothNum && sb.ToString().Contains(searchfor))
{
sb.Insert(sb.ToString().IndexOf(searchfor), " <mn>" + form.Num1 + "</mn>");
Session["num"] = form.Num1;
}
if (form.BoldIdent && sb.ToString().Contains(searchfor))
{
sb.Insert(sb.ToString().IndexOf(searchfor), " <msup> <mi mathvariant='bold'>" + form.Ident1 + "</mi> <mi>" + form.Ident2 + "</mi> </msup>");
Session["ident"] = form.Ident1;
}
else
{
sb.Insert(sb.ToString().IndexOf(searchfor), " <msup> <mi>" + form.Ident1 + "</mi> <mi>" + form.Ident2 + "</mi> </msup>");
Session["ident"] = form.Ident1;
}
form.Insert = "Operator";
break;
case "Superscript (Identifier, Row)":
if (form.BothNum && sb.ToString().Contains(searchfor))
{
sb.Insert(sb.ToString().IndexOf(searchfor), " <mn>" + form.Num1 + "</mn>");
Session["num"] = form.Num1;
}
if (form.BoldIdent && sb.ToString().Contains(searchfor))
{
sb.Insert(sb.ToString().IndexOf(searchfor), " <msup> <mi mathvariant='bold'>" + form.Ident1 + "</mi> <mrow> #suprow </mrow> </msup>");
Session["ident"] = form.Ident1;
}
else
{
sb.Insert(sb.ToString().IndexOf(searchfor), " <msup> <mi>" + form.Ident1 + "</mi> <mrow> #suprow </mrow> </msup>");
Session["ident"] = form.Ident1;
}
form.Target = "Superscript Row";
form.Insert = "Identifier";
break;
case "Superscript (Row, Identifier)":
if (form.BothNum && sb.ToString().Contains(searchfor))
{
sb.Insert(sb.ToString().IndexOf(searchfor), " <mn>" + form.Num1 + "</mn>");
Session["num"] = form.Num1;
}
if (form.BoldIdent && sb.ToString().Contains(searchfor))
{
sb.Insert(sb.ToString().IndexOf(searchfor), " <msup> <mrow> #suprow </mrow> <mi mathvariant='bold'>" + form.Ident1 + "</mi> </msup>");
}
else
{
sb.Insert(sb.ToString().IndexOf(searchfor), " <msup> <mrow> #suprow </mrow> <mi>" + form.Ident1 + "</mi> </msup>");
Session["ident"] = form.Ident1;
}
form.Target = "Superscript Row";
form.Insert = "Identifier";
break;
case "Superscript (Row, Number)":
if (form.BothNum && sb.ToString().Contains(searchfor))
{
sb.Insert(sb.ToString().IndexOf(searchfor), " <mn>" + form.Num2 + "</mn>");
}
if (sb.ToString().Contains(searchfor))
{
sb.Insert(sb.ToString().IndexOf(searchfor), " <msup> <mrow> #suprow </mrow> <mn>" + form.Num1 + "</mn> </msup>");
Session["num"] = form.Num1;
}
form.Target = "Superscript Row";
form.Insert = "Identifier";
break;
case "Superscript (Row, Row)":
if (form.BothNum && sb.ToString().Contains(searchfor))
{
sb.Insert(sb.ToString().IndexOf(searchfor), " <mn>" + form.Num1 + "</mn>");
Session["num"] = form.Num1;
}
if (sb.ToString().Contains(searchfor))
{
sb.Insert(sb.ToString().IndexOf(searchfor), " <msup> <mrow> #suprow </mrow> <mrow> #suprow2 </mrow> </msup>");
}
form.Target = "Superscript Row";
form.Insert = "Identifier";
break;
case "SubSup (Identifier, Number, Number)":
if (form.BoldIdent && sb.ToString().Contains(searchfor))
{
sb.Insert(sb.ToString().IndexOf(searchfor), " <msubsup> <mi mathvariant='bold'>" + form.Ident1 + "</mi> <mn>" + form.Num1 + "</mn> <mn>" + form.Num2 + "</mn> </msubsup>");
Session["ident"] = form.Ident1;
Session["num"] = form.Num1;
}
else
{
sb.Insert(sb.ToString().IndexOf(searchfor), " <msubsup> <mi>" + form.Ident1 + "</mi> <mn>" + form.Num1 + "</mn> <mn>" + form.Num2 + "</mn> </msubsup>");
Session["ident"] = form.Ident1;
Session["num"] = form.Num1;
}
form.Insert = "Operator";
break;
case "SubSup (Identifier, Number, Identifier)":
if (form.BothNum && sb.ToString().Contains(searchfor))
{
sb.Insert(sb.ToString().IndexOf(searchfor), " <mn>" + form.Num2 + "</mn>");
}
if (form.BoldIdent && sb.ToString().Contains(searchfor))
{
sb.Insert(sb.ToString().IndexOf(searchfor), " <msubsup> <mi mathvariant='bold'>" + form.Ident1 + "</mi> <mn>" + form.Num1 + "</mn> <mi>" + form.Ident2 + "</mi> </msubsup>");
Session["ident"] = form.Ident1;
Session["num"] = form.Num1;
}
else
{
sb.Insert(sb.ToString().IndexOf(searchfor), " <msubsup> <mi>" + form.Ident1 + "</mi> <mn>" + form.Num1 + "</mn> <mi>" + form.Ident2 + "</mi> </msubsup>");
Session["ident"] = form.Ident1;
Session["num"] = form.Num1;
}
form.Insert = "Operator";
break;
case "SubSup (Identifier, Identifier, Number)":
if (form.BothNum && sb.ToString().Contains(searchfor))
{
sb.Insert(sb.ToString().IndexOf(searchfor), " <mn>" + form.Num2 + "</mn>");
}
if (form.BoldIdent && sb.ToString().Contains(searchfor))
{
sb.Insert(sb.ToString().IndexOf(searchfor), " <msubsup> <mi mathvariant='bold'>" + form.Ident1 + "</mi> <mi>" + form.Ident2 + "</mi> <mn>" + form.Num1 + "</mn> </msubsup>");
Session["ident"] = form.Ident1;
Session["num"] = form.Num1;
}
else
{
sb.Insert(sb.ToString().IndexOf(searchfor), " <msubsup> <mi>" + form.Ident1 + "</mi> <mi>" + form.Ident2 + "</mi> <mn>" + form.Num1 + "</mn> </msubsup>");
Session["ident"] = form.Ident1;
Session["num"] = form.Num1;
}
form.Insert = "Operator";
break;
case "SubSup (Identifier, Row, Row)":
if (form.BothNum && sb.ToString().Contains(searchfor))
{
sb.Insert(sb.ToString().IndexOf(searchfor), " <mn>" + form.Num1 + "</mn>");
Session["num"] = form.Num1;
}
if (form.BoldIdent && sb.ToString().Contains(searchfor))
{
sb.Insert(sb.ToString().IndexOf(searchfor), " <msubsup> <mi mathvariant='bold'>" + form.Ident1 + "</mi> <mrow> #subrow </mrow> <mrow> #suprow </mrow> </msubsup>");
Session["ident"] = form.Ident1;
}
else
{
sb.Insert(sb.ToString().IndexOf(searchfor), " <msubsup> <mi>" + form.Ident1 + "</mi> <mrow> #subrow </mrow> <mrow> #suprow </mrow> </msubsup>");
Session["ident"] = form.Ident1;
}
form.Target = "Subscript Row";
form.Insert = "Identifier";
break;
case "Row":
if (sb.ToString().Contains(searchfor))
{
sb.Insert(sb.ToString().IndexOf(searchfor), " <mrow> #row </mrow>");
}
form.Target = "Row";
form.Insert = "Identifier";
break;
case "Fraction":
if (sb.ToString().Contains(searchfor))
{
sb.Insert(sb.ToString().IndexOf(searchfor), " <mstyle mathsize='1.2em'> <mfrac> <mrow> #numerator </mrow> <mrow> #denominator </mrow> </mfrac> </mstyle>");
}
form.Target = "Numerator";
form.Insert = "Number";
break;
case "Square Root":
if (sb.ToString().Contains(searchfor))
{
sb.Insert(sb.ToString().IndexOf(searchfor), " <msqrt> <mrow> #sqrtrow </mrow> </msqrt>");
}
form.Target = "Square Root Row";
form.Insert = "Number";
break;
case "Root":
if (sb.ToString().Contains(searchfor))
{
sb.Insert(sb.ToString().IndexOf(searchfor), " <mroot> <mrow> #rootrow </mrow> <mn>" + form.Num1 + "</mn></mroot>");
Session["num"] = form.Num1;
}
form.Target = "Root Row";
form.Insert = "Number";
break;
case "Under Over":
if (sb.ToString().Contains(searchfor))
{
sb.Insert(sb.ToString().IndexOf(searchfor), " <munderover> <mo>" + form.Oper1 + "</mo> <mrow> #underrow </mrow> <mrow> #overrow </mrow> </munderover>");
Session["oper"] = form.Oper1;
}
form.Target = "Under Row";
form.Insert = "Identifier";
break;
case "Over":
if (form.BoldIdent && sb.ToString().Contains(searchfor))
{
sb.Insert(sb.ToString().IndexOf(searchfor), " <mover> <mi mathvariant='bold'>" + form.Ident1 + "</mi> <mo mathvariant='bold'>" + form.Oper1 + "</mo> </mover>");
Session["ident"] = form.Ident1;
Session["oper"] = form.Oper1;
}
else
{
sb.Insert(sb.ToString().IndexOf(searchfor), " <mover> <mi>" + form.Ident1 + "</mi> <mo>" + form.Oper1 + "</mo> </mover>");
Session["ident"] = form.Ident1;
Session["oper"] = form.Oper1;
}
form.Insert = "Operator";
break;
case "Fenced 1":
sb.Insert(sb.ToString().IndexOf(searchfor), " <mfenced> <mi>" + form.Ident1 + "</mi> </mfenced>");
Session["ident"] = form.Ident1;
form.Insert = "Operator";
break;
case "Fenced 2":
sb.Insert(sb.ToString().IndexOf(searchfor), " <mfenced> <mi>" + form.Ident1 + "</mi> <mi>" + form.Ident2 + "</mi> </mfenced>");
Session["ident"] = form.Ident1;
form.Insert = "Operator";
break;
case "Fenced 3":
sb.Insert(sb.ToString().IndexOf(searchfor), " <mfenced> <mi>" + form.Ident1 + "</mi> <mi>" + form.Ident2 + "</mi> <mi>" + form.Num1 + "</mi> </mfenced>");
Session["ident"] = form.Ident1;
Session["num"] = form.Num1;
form.Insert = "Operator";
break;
case "Space":
if (sb.ToString().Contains(searchfor))
{
sb.Insert(sb.ToString().IndexOf(searchfor), " <mspace width=" + form.Space + "em />");
}
Session["space"] = form.Space;
form.Insert = "Text";
break;
case "Text":
if (form.BoldText && sb.ToString().Contains(searchfor))
{
sb.Insert(sb.ToString().IndexOf(searchfor), " <mspace width=.2em /> <mtext mathvariant='bold'>" + form.Text + "</mtext> <mspace width=.2em /> ");
Session["text"] = form.Text;
}
else
{
sb.Insert(sb.ToString().IndexOf(searchfor), " <mspace width=.2em /> <mtext>" + form.Text + "</mtext> <mspace width=.2em /> ");
Session["text"] = form.Text;
}
form.Insert = "Identifier";
break;
case "Line Break":
if (sb.ToString().Contains(searchfor))
{
sb.Insert(sb.ToString().IndexOf(searchfor), " <mspace linebreak='newline' /> ");
}
break;
default:
break;
}
}
if (form.ClearFormula)
{
form.ClearFormula = false;
}
if (form.BoldIdent)
{
form.BoldIdent = false;
}
if (form.BoldText)
{
form.BoldText = false;
}
if (form.BothIdent)
{
form.BothIdent = false;
}
if (form.BothOper)
{
form.BothOper = false;
}
if (form.BothNum)
{
form.BothNum = false;
}
Session["undo"] = Session["formula"];
Session["formula"] = sb.ToString();
}
return(View(form));
}
else
{
// there is something wrong with the data values
return(View(form));
}
}
