/// <summary>
/// Retrives the related items for a token from the remaining items list.
/// </summary>
/// <param name="matched">
/// The <see cref="Token"/> the items we are looking for are related to.
/// </param>
/// <param name="remainingItems">
/// A <see cref="TokenSequence"/> containing the yet to be matched items.
/// </param>
/// <param name="position">
/// A <see cref="ExpressionItemPosition"/> the position of the related item.
/// </param>
/// <returns>
/// A <see cref="TokenSequence"/> containing the items related to the
/// matched item found in the given position.
/// </returns>
protected TokenSequence GetRelatedItems(Token matched,
TokenSequence remainingItems,
ExpressionItemPosition position)
{
TokenSequence sequence = new TokenSequence();
string remainingItemsString = remainingItems.ToString();
int i = 0;
while (i < remainingItems.Count)
{
Token checkedItem = remainingItems[i];
if (CheckTokenInRelatedSequence(matched, checkedItem, position))
{
sequence.Append(checkedItem);
remainingItems.RemoveAt(i);
}
else if (!SpecialPosition(matched, checkedItem))
{
LogSentInvoker("Encontrado {0}, cancelando la creación de la secuencia de items «{1}» {2}",
checkedItem.Text,
position,
matched.Type);
break;
}
else
{
i++;
}
}
LogSentInvoker("Extraida la secuencia ({0}) en posicion «{1}» de entre los elementos de ({2})",
sequence,
position,
remainingItemsString);
return(sequence);
}
/// <summary>
/// Checks if a token is in a given position related to the matched token.
/// </summary>
/// <param name="matched">
/// A <see cref="Token"/> which the checked token will be checked to.
/// </param>
/// <param name="checkedItem">
/// A <see cref="Token"/> that we want to know if it is in the related
/// position especified respect to the matched token.
/// </param>
/// <param name="position">
/// A <see cref="ExpressionItemPosition"/> specifiying the position the
/// checked item should be.
/// </param>
/// <returns>
/// A <see cref="System.Boolean"/> indicating if the checked item is in the
/// given position related to the matched token.
/// </returns>
protected bool CheckTokenInRelatedSequence(Token matched,
Token checkedItem,
ExpressionItemPosition position)
{
bool res = false;
switch (position)
{
case ExpressionItemPosition.Above:
// This condition is used for upper fraction operands
// and summatory-like limit expression.
res = checkedItem.Bottom < matched.Top;
break;
case ExpressionItemPosition.Below:
// This condition is used for lower fraction operands
// and summatory-like initialization expressions.
res = checkedItem.Top > matched.Bottom;
break;
case ExpressionItemPosition.Inside:
// This condition is used for roots' inner expressions.
res = ((checkedItem.Left >= matched.TopmostX) &&
(checkedItem.Right < matched.Right) &&
(checkedItem.Top > matched.Top) &&
(checkedItem.Bottom < matched.Bottom));
break;
case ExpressionItemPosition.RootIndex:
// This condition is used for roots' index expressions.
res = ((checkedItem.Left < matched.TopmostX) &&
(checkedItem.Bottom < matched.Percent0_66Line));
break;
case ExpressionItemPosition.SubIndex:
// This condition is used for subindexes and
// integral-like initialization expressions.
// We treat the comma case specialy :(
res = (matched.Left <checkedItem.Left &&
((checkedItem.Text == "," && checkedItem.Bodyline > matched.Baseline) ||
(checkedItem.Text != "," && checkedItem.Bodyline > matched.Percent0_33Line)) &&
checkedItem.Baseline> matched.Percent0_75Line);
break;
case ExpressionItemPosition.SuperIndex:
// This condition is used for superindexe and
// integral-like limit expressions.
res = (matched.Left < checkedItem.Left &&
checkedItem.Baseline < matched.Percent0_75Line &&
checkedItem.Bodyline < matched.Percent0_33Line);
break;
}
return(res);
}
/// <summary>
/// Checks if a token is in a given position related to the matched token.
/// </summary>
/// <param name="matched">
/// A <see cref="Token"/> which the checked token will be checked to.
/// </param>
/// <param name="checkedItem">
/// A <see cref="Token"/> that we want to know if it is in the related
/// position especified respect to the matched token.
/// </param>
/// <param name="position">
/// A <see cref="ExpressionItemPosition"/> specifiying the position the
/// checked item should be.
/// </param>
/// <returns>
/// A <see cref="System.Boolean"/> indicating if the checked item is in the
/// given position related to the matched token.
/// </returns>
protected bool CheckTokenInRelatedSequence(Token matched,
Token checkedItem,
ExpressionItemPosition position)
{
bool res = false;
switch(position)
{
case ExpressionItemPosition.Above:
// This condition is used for upper fraction operands
// and summatory-like limit expression.
res = checkedItem.Bottom< matched.Top;
break;
case ExpressionItemPosition.Below:
// This condition is used for lower fraction operands
// and summatory-like initialization expressions.
res = checkedItem.Top > matched.Bottom;
break;
case ExpressionItemPosition.Inside:
// This condition is used for roots' inner expressions.
res = ((checkedItem.Left >= matched.TopmostX )
&& (checkedItem.Right < matched.Right)
&& (checkedItem.Top> matched.Top)
&& (checkedItem.Bottom < matched.Bottom));
break;
case ExpressionItemPosition.RootIndex:
// This condition is used for roots' index expressions.
res = ((checkedItem.Left < matched.TopmostX)
&& (checkedItem.Bottom < matched.Percent0_66Line));
break;
case ExpressionItemPosition.SubIndex:
// This condition is used for subindexes and
// integral-like initialization expressions.
// We treat the comma case specialy :(
res = (matched.Left< checkedItem.Left
&& ((checkedItem.Text =="," && checkedItem.Bodyline > matched.Baseline)
||( checkedItem.Text !="," && checkedItem.Bodyline > matched.Percent0_33Line))
&& checkedItem.Baseline > matched.Percent0_75Line);
break;
case ExpressionItemPosition.SuperIndex:
// This condition is used for superindexe and
// integral-like limit expressions.
res = (matched.Left < checkedItem.Left
&& checkedItem.Baseline < matched.Percent0_75Line
&& checkedItem.Bodyline < matched.Percent0_33Line);
break;
}
return res;
}
/// <summary>
/// Retrives the related items for a token from the remaining items list.
/// </summary>
/// <param name="matched">
/// The <see cref="Token"/> the items we are looking for are related to.
/// </param>
/// <param name="remainingItems">
/// A <see cref="TokenSequence"/> containing the yet to be matched items.
/// </param>
/// <param name="position">
/// A <see cref="ExpressionItemPosition"/> the position of the related item.
/// </param>
/// <returns>
/// A <see cref="TokenSequence"/> containing the items related to the
/// matched item found in the given position.
/// </returns>
protected TokenSequence GetRelatedItems(Token matched,
TokenSequence remainingItems,
ExpressionItemPosition position)
{
TokenSequence sequence = new TokenSequence();
string remainingItemsString = remainingItems.ToString();
int i= 0;
while (i < remainingItems.Count)
{
Token checkedItem = remainingItems[i];
if(CheckTokenInRelatedSequence(matched, checkedItem, position))
{
sequence.Append(checkedItem);
remainingItems.RemoveAt(i);
}
else if(!SpecialPosition(matched, checkedItem))
{
LogSentInvoker("Encontrado {0}, cancelando la creación de la secuencia de items «{1}» {2}",
checkedItem.Text,
position,
matched.Type);
break;
}
else
{
i++;
}
}
LogSentInvoker("Extraida la secuencia ({0}) en posicion «{1}» de entre los elementos de ({2})",
sequence,
position,
remainingItemsString);
return sequence;
}
