public Msubsup(IBuildable[] contents)
{ // handle star superscript
List <IBuildable> localCopy = new List <IBuildable>(contents);
if (localCopy.Count == 3)
{
Mo mo = localCopy[2] as Mo;
if (mo != null && mo.IsTimesOrStar)
{
Mi subscript = localCopy[1] as Mi;
if (subscript != null)
{
subscript.Content += Semantics.starPrefix;
localCopy.RemoveAt(2);
}
else
{
// maybe the subscript is an mrow
Mrow row = localCopy[1] as Mrow;
if (row != null && row.LastElement != null && row.LastElement is WithTextContent)
{
WithTextContent lastElem = (WithTextContent)row.LastElement;
lastElem.Content += Semantics.starPrefix;
localCopy.RemoveAt(2);
}
}
}
}
base.contents = localCopy.ToArray();
}
public override void Visit(StringBuilder sb, BuildContext bc)
{
if (bc.Options.SubscriptMode)
{
// separate by double underscore to differentiate from Msub and prevent clashes
first.Visit(sb, bc);
sb.Append("__");
second.Visit(sb, bc);
}
else if (second is Mo && (second as Mo).IsTimesOrStar && first is Mi)
{
// this isn't really a superscript - it's part of the variable
Mi mi = (Mi)first;
Mi newMi = new Mi(mi.Content + Semantics.starPrefix);
newMi.Visit(sb, bc);
}
else
{
if (bc.LastTokenRequiresTimes)
{
sb.Append("*");
}
// determine whether power must be inlined
bool firstIsMrowMi = (first is Mrow) && ((first as Mrow).ContainsSingleMi);
bool secondIsIntegralPower = (second is Mrow) && ((second as Mrow).ContainsSingleMn) &&
((second as Mrow).LastElement as Mn).IsIntegerGreaterThan1;
bool mustInlinePower = false;
int power = 0;
if (secondIsIntegralPower)
{
power = ((second as Mrow).LastElement as Mn).IntegerValue;
mustInlinePower = power <= bc.Options.MaxInlinePower;
}
if (mustInlinePower)
{
for (int i = 0; i < power; ++i)
{
first.Visit(sb, bc); // * sign appended automatically
}
}
else
{
sb.Append("Math.Pow(");
first.Visit(sb, bc);
sb.Append(", ");
second.Visit(sb, bc);
sb.Append(")");
}
}
bc.Tokens.Add(this);
}
/// <summary>
/// This function replaces all known inverse trig functions (in the msup blocks)
/// by inverse names, so that sin^-1 becomes arcsin.
/// </summary>
/// <param name="contents">Buidlable contents</param>
private static void ReplaceInverseTrigFunctions(IBuildable[] contents)
{
for (int i = 0; i < contents.Length; i++)
{
IBuildable c = contents[i];
string trigFunction = string.Empty;
if (c is Msup)
{
bool funcIsTrig = false, radixIsNeg1 = false;
Pair <IBuildable, IBuildable> terms = (c as Msup).Values;
if (terms.First is Mrow)
{
Mrow row1 = terms.First as Mrow;
if (row1.Contents.Length > 0 && row1.Contents[0] is Mi)
{
if (Semantics.inverseTrigs.ContainsKey((row1.Contents[0] as Mi).Content))
{
trigFunction = (row1.Contents[0] as Mi).Content;
funcIsTrig = true;
}
}
}
if (terms.Second is Mrow)
{
Mrow row2 = terms.Second as Mrow;
StringBuilder sb = new StringBuilder();
BuildContext bc = new BuildContext();
row2.Visit(sb, bc);
if (sb.ToString() == "-1")
{
radixIsNeg1 = true;
}
}
// if this is an inverse function, replace an <msup> with an inverse <mi>
if (funcIsTrig && radixIsNeg1)
{
Mi mi = new Mi(Semantics.inverseTrigs[trigFunction]);
contents[i] = mi;
}
}
}
}
public virtual void Visit(StringBuilder sb, BuildContext context)
{
bool containsFunct = false;
int numFuncts = 0;
if (sb == null || context == null || contents == null || contents.Length == 0)
{
return;
}
// copy contents into list
List <IBuildable> ctxCopy = new List <IBuildable>(contents);
// check if the Sigma operator acts as a sum
if (context.Options.TreatSigmaAsSum)
{
// look for the plain sigma operator
int index;
while ((index = ctxCopy.FindIndex(a => (a is Mo && (a as Mo).IsSigma))) != -1)
{
// so long as it is not the last element
if (index != ctxCopy.Count - 1)
{
BuildablePlainSum bps = new BuildablePlainSum(ctxCopy[index + 1]);
ctxCopy.RemoveAt(index + 1);
ctxCopy[index] = bps;
context.AddSum(bps);
}
}
}
// check if delta <mo> appears before an <mi>
if (context.Options.DeltaPartOfIdent)
{
int index;
while ((index = ctxCopy.FindIndex(a => (a is Mo && (a as Mo).IsDelta))) != -1)
{
// check that it's not the last element
if (index != ctxCopy.Count - 1)
{
// check that the next element is <mi>
Mi mi = ctxCopy[index + 1] as Mi;
if (mi != null)
{
// change Mi's content to incorporate the delta
Mi newMi = new Mi("∆" + mi.Content);
ctxCopy[index + 1] = newMi;
// remove the delta
ctxCopy.RemoveAt(index);
Trace.WriteLine(newMi.Content);
}
}
}
}
else
{
// change delta from mo to mi
int index;
while ((index = ctxCopy.FindIndex(a => (a is Mo && (a as Mo).IsDelta))) != -1)
{
ctxCopy[index] = new Mi("∆");
}
}
// Scan for functions.
// If one is found, increment the number. Because nested
// functions which do not contain parentheses (e.g. sin sin x)
// are contained in the same row element (in non-Word generated markup),
// this allows us to determine how many close parens we need.
foreach (IBuildable v in ctxCopy)
{
if (v is Mi && Semantics.knownFuncts.Contains((v as Mi).Content))
{
containsFunct = true;
numFuncts++;
}
}
if (containsFunct)
{
// Only process if this is not the spurious function.
if (ctxCopy.Count != 1 || (!Semantics.knownFuncts.Contains((ctxCopy[0] as Mi).Content)))
{
foreach (IBuildable v in ctxCopy)
{
v.Visit(sb, context);
}
for (; numFuncts > 0; numFuncts--)
{
sb.Append(")");
}
}
}
// No function was found, so process in the normal fashion.
else
{
foreach (var v in ctxCopy)
{
v.Visit(sb, context);
}
}
}