public override void CollectConditionProperties(IPropertyCollector properties)
{
lock (conditionPropertiesLock) {
if (!combinedPropertySet)
{
combinedPropertySet = true;
if ((op == RelationOperator.Equal || op == RelationOperator.NotEqual) && left is ConditionFactorExpression && right is ConditionFactorExpression)
{
var leftString = ((ConditionFactorExpression)left).Token.Value;
var rightString = ((ConditionFactorExpression)right).Token.Value;
int il = 0;
int rl = 0;
while (il < leftString.Length && rl < rightString.Length)
{
if (il < leftString.Length - 2 && leftString [il] == '$' && leftString [il + 1] == '(')
{
ReadPropertyCondition(leftString, ref combinedProperty, ref combinedValue, ref il, rightString, ref rl);
}
else if (rl < rightString.Length - 2 && rightString [rl] == '$' && rightString [rl + 1] == '(')
{
ReadPropertyCondition(rightString, ref combinedProperty, ref combinedValue, ref rl, leftString, ref il);
}
else if (leftString [il] != rightString [rl])
{
return; // Condition can't be true
}
il++; rl++;
}
}
}
}
// This condition sets values for more that one property. In addition to the individual values, also register
// the combination of values. So for example if the condition has "$(Configuration)|$(Platform) == Foo|Bar",
// the conditioned property collection would contain Configuration=Foo, Platform=Bar, (Configuration|Platfrom)=Foo|Bar
if (combinedProperty != null)
{
properties.AddPropertyValues(combinedProperty, combinedValue);
}
}