Upsilon/apps/sequence/graph/term_sum_controller.cpp

#include "term_sum_controller.h"
#include "../../shared/text_field_delegate.h"
#include <poincare/sum.h>
#include <poincare/code_point_layout.h>
#include <poincare/horizontal_layout.h>
#include <poincare/vertical_offset_layout.h>

#include <cmath>

extern "C" {
#include <assert.h>
#include <stdlib.h>
}

using namespace Shared;
using namespace Poincare;

namespace Sequence {

TermSumController::TermSumController(Responder * parentResponder, ::InputEventHandlerDelegate * inputEventHandlerDelegate, GraphView * graphView, CurveViewRange * graphRange, CurveViewCursor * cursor) :
  SumGraphController(parentResponder, inputEventHandlerDelegate, graphView, graphRange, cursor, UCodePointNArySummation)
{
}

const char * TermSumController::title() {
  return I18n::translate(I18n::Message::TermSum);
}

bool TermSumController::moveCursorHorizontallyToPosition(double position) {
  if (position < 0.0) {
    return false;
  }
  return SumGraphController::moveCursorHorizontallyToPosition(std::round(position));
}

I18n::Message TermSumController::legendMessageAtStep(Step step) {
  switch(step) {
    case Step::FirstParameter:
      return I18n::Message::SelectFirstTerm;
    case Step::SecondParameter:
      return I18n::Message::SelectLastTerm;
    default:
      return I18n::Message::Default;
  }
}

double TermSumController::cursorNextStep(double x, int direction) {
  double delta = direction > 0 ? 1.0 : -1.0;
  return std::round(m_cursor->x()+delta);
}

Layout TermSumController::createFunctionLayout(Shared::ExpiringPointer<Shared::Function> function) {
  Sequence * sequence = static_cast<Sequence *>(function.pointer());
  return sequence->nameLayout();
}

Poincare::Expression TermSumController::sumBetweenBounds(Shared::ExpiringPointer<Shared::Function> function, double start, double end, Poincare::Context * context) const {
  return Poincare::Sum::Builder(function->expressionReduced(context).clone(), Poincare::Symbol::Builder(UCodePointUnknownX), Poincare::Float<double>::Builder(start), Poincare::Float<double>::Builder(end)); // Sum takes ownership of args
}

}