6663b6c9
 adorian
projet complet av...
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#include "equation.h"
using namespace Poincare;
namespace Solver {
Equation::Equation() :
Shared::ExpressionModel(),
m_standardForm(nullptr)
{
}
Equation& Equation::operator=(const Equation& other) {
Shared::ExpressionModel::operator=(other);
return *this;
}
Equation::~Equation() {
tidyStandardForm();
}
void Equation::setContent(const char * c) {
/* ExpressionModel::setContent takes care of tidying m_expression and m_layout. */
tidyStandardForm();
ExpressionModel::setContent(c);
}
void Equation::tidy() {
ExpressionModel::tidy();
if (m_standardForm) {
delete m_standardForm;
m_standardForm = nullptr;
}
}
Expression * Equation::standardForm(Context * context) const {
if (m_standardForm == nullptr) {
Expression * e = expression(context);
if (e->type() == Expression::Type::Equal) {
m_standardForm = static_cast<const Equal *>(e)->standardEquation(*context, Preferences::sharedPreferences()->angleUnit());
} else if (e->type() == Expression::Type::Rational && static_cast<Rational *>(e)->isOne()) {
// The equality was reduced which means the equality was always true.
m_standardForm = new Rational(0);
} else {
// The equality has an undefined operand
assert(e->type() == Expression::Type::Undefined);
}
}
return m_standardForm;
}
void Equation::tidyStandardForm() {
if (m_standardForm) {
delete m_standardForm;
m_standardForm = nullptr;
}
}
}
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