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build1/epsilon-master/poincare/src/layout/empty_layout.h 2.14 KB
6663b6c9   adorian   projet complet av...
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  #ifndef POINCARE_empty_layout_H
  #define POINCARE_empty_layout_H
  
  #include <poincare/static_layout_hierarchy.h>
  #include <kandinsky/text.h>
  #include <assert.h>
  
  namespace Poincare {
  
  class EmptyLayout : public StaticLayoutHierarchy<0> {
  public:
    enum class Color {
      Yellow,
      Grey
    };
    EmptyLayout(Color color = Color::Yellow, bool visible = true, KDText::FontSize size = KDText::FontSize::Large, bool margins = true);
    ExpressionLayout * clone() const override;
  
    // EmptyLayout
    Color color() const { return m_color; }
    void setColor(Color color) { m_color = color; }
    bool isVisible() const { return m_isVisible; }
    void setVisible(bool visible) { m_isVisible = visible; }
  
    // User input
    void deleteBeforeCursor(ExpressionLayoutCursor * cursor) override;
  
    // Tree navigation
    ExpressionLayoutCursor cursorLeftOf(ExpressionLayoutCursor cursor, bool * shouldRecomputeLayout) override;
    ExpressionLayoutCursor cursorRightOf(ExpressionLayoutCursor cursor, bool * shouldRecomputeLayout) override;
  
    // Serialization
    int writeTextInBuffer(char * buffer, int bufferSize) const override;
  
    // Other
    bool isEmpty() const override { return true; }
  
  protected:
    void render(KDContext * ctx, KDPoint p, KDColor expressionColor, KDColor backgroundColor) override;
    KDSize computeSize() override;
    void computeBaseline() override;
    KDPoint positionOfChild(ExpressionLayout * child) override {
      assert(false);
      return KDPointZero;
    }
    void privateAddSibling(ExpressionLayoutCursor * cursor, ExpressionLayout * sibling, bool moveCursor) override;
  private:
    constexpr static KDCoordinate k_marginWidth = 1;
    constexpr static KDCoordinate k_marginHeight = 3;
    constexpr static KDCoordinate k_lineThickness = 1;
    ExpressionLayoutCursor cursorVerticalOf(VerticalDirection direction, ExpressionLayoutCursor cursor, bool * shouldRecomputeLayout, bool equivalentPositionVisited) override;
    KDCoordinate height() const { return KDText::charSize(m_size).height() - 2*k_marginHeight; }
    KDCoordinate width() const { return KDText::charSize(m_size).width() - 2*k_marginWidth; }
    bool m_isVisible;
    Color m_color;
    KDText::FontSize m_size;
    bool m_margins;
  };
  
  }
  
  #endif