private static LMD_Object getElementAtStartOfAString(String input)
{
if (input == null || input.Length == 0)
{
return(new LMD_Plaintext(""));
}
LMD_Object lmdObj = null;
// this is guaranteed to be a valid start of an element. The else part will take care of the escaped $
if (input[0] == '$')
{
lmdObj = readMathtext(input);
}
// 7 is minimal length of a valid eval command - notice the parentheses!
// simplest eval is eval(x) -> length is 7
else if (input.Length >= 7 && input.Substring(0, 4).ToLower() == "eval")
{
lmdObj = readCommandtextEval(input);
}
// 13 is minimal length of a valid plot command - notice the parentheses and parameters
// simplest plot is plot(x,0,5,5) -> length is 13
else if (input.Length >= 13 && input.Substring(0, 4).ToLower() == "plot")
{
lmdObj = readCommandtextPlot(input);
}
// if no condition was satisfied, lmdObj shall be null so plaintext object will be created
return((lmdObj == null) ? readPlaintext(input) : lmdObj);
}
private void createObjects(String input)
{
if (input.Length == 0)
{
Content.Add(new LMD_Plaintext(""));
return;
}
while (input.Length != 0)
{
LMD_Object foundElement = getElementAtStartOfAString(input);
Content.Add(foundElement);
input = input.Substring(foundElement.Text.Length);
}
}
public Boolean isEqualTo(LMD_Object cmpObj)
{
LMD_Commandtext cmpCt = cmpObj as LMD_Commandtext;
return(cmpCt != null && Text == cmpCt.Text);
}
public bool isEqualTo(LMD_Object cmpObj)
{
LMD_Plaintext cmpPt = cmpObj as LMD_Plaintext;
return(cmpPt != null && Text == cmpPt.Text);
}
public bool isEqualTo(LMD_Object cmpObj)
{
LMD_Mathtext cmpMt = cmpObj as LMD_Mathtext;
return(cmpMt != null && Text == cmpMt.Text);
}
