using System;
using System.Collections.Generic;
using System.Text;
using FormulaEditor.Interfaces;
namespace FormulaEditor
{
/// <summary>
/// Conditional operation
/// </summary>
public class OptionalOperation : IObjectOperation, ICloneable, IFormulaCreatorOperation
{
/// <summary>
/// Type
/// </summary>
public object type;
/// <summary>
/// Constructor
/// </summary>
/// <param name="type">Type</param>
public OptionalOperation(object type)
{
this.type = type;
}
/// <summary>
/// Creates formula
/// </summary>
/// <param name="tree">Operation tree</param>
/// <param name="level">Formula level</param>
/// <param name="sizes">Sizes of symbols</param>
/// <returns>The formula</returns>
public MathFormula CreateFormula(ObjectFormulaTree tree, byte level, int[] sizes)
{
return CreateFormula(this, tree, level, sizes, "?:");
}
/// <summary>
/// Operation priority
/// </summary>
public int OperationPriority
{
get
{
return (int)ElementaryOperationPriorities.Optional;
}
}
/// <summary>
/// Clones itself
/// </summary>
/// <returns>A clone</returns>
public object Clone()
{
return new OptionalOperation(type);
}
/// <summary>
/// Arity of this operation
/// </summary>
public int Arity
{
get
{
return 3;
}
}
/// <summary>
/// Calculates result of this operation
/// </summary>
public object this[object[] x]
{
get
{
bool b = (bool)x[0];
return b ? x[1] : x[2];
}
}
/// <summary>
/// Return type
/// </summary>
public object ReturnType
{
get
{
return type;
}
}
/// <summary>
/// The "is powered" sign
/// </summary>
public bool IsPowered
{
get
{
return false;
}
}
/// <summary>
/// Creates formula
/// </summary>
/// <param name="tree">Tree</param>
/// <param name="level">Level</param>
/// <param name="sizes">Sizes</param>
/// <param name="str">Str of binrary</param>
/// <returns>The formuls</returns>
public static MathFormula CreateFormula(IFormulaCreatorOperation operation, ObjectFormulaTree tree, byte level, int[] sizes, string str)
{
MathFormula form = new MathFormula(level, sizes);
for (int i = 0; i < str.Length + 1; i++)
{
IFormulaCreatorOperation op = tree[i].Operation as IFormulaCreatorOperation;
MathFormula f = op.CreateFormula(tree[i], level, sizes);
MathFormula fp = null;
if (op.OperationPriority < operation.OperationPriority)
{
fp = new MathFormula(level, sizes);
MathSymbol s = new BracketsSymbol();
s.Append(fp);
fp.First[0] = f;
}
else
{
fp = f;
}
form.Add(fp);
if (i < str.Length)
{
MathSymbol s = new BinarySymbol(str[i]);
s.Append(form);
}
}
return form;
}
}
}
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