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47 lines
1.7 KiB
C++
47 lines
1.7 KiB
C++
#ifndef SHARED_STORAGE_EXPRESSION_MODEL_H
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#define SHARED_STORAGE_EXPRESSION_MODEL_H
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#include <poincare/context.h>
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#include <poincare/expression.h>
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#include <poincare/layout.h>
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#include <ion/storage.h>
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namespace Shared {
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// StorageExpressionModel is a handle to Ion::Record
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class StorageExpressionModel : public Ion::Storage::Record {
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// TODO find better name (once we remove ExpressionModel?)
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public:
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StorageExpressionModel(Ion::Storage::Record record);
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void text(char * buffer, size_t bufferSize) const;
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Poincare::Expression expressionReduced(Poincare::Context * context) const;
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Poincare::Expression expressionClone() const;
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Poincare::Layout layout();
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/* TODO This comment will be true when Sequence inherits from this class
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* Here, isDefined is the exact contrary of isEmpty. However, for Sequence
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* inheriting from ExpressionModel, isEmpty and isDefined have not exactly
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* opposite meaning. For instance, u(n+1)=u(n) & u(0) = ... is not empty and
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* not defined. We thus have to keep both methods. */
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virtual bool isDefined();
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virtual bool isEmpty();
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virtual bool shouldBeClearedBeforeRemove() { return !isEmpty(); }
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virtual void tidy();
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virtual Ion::Storage::Record::ErrorStatus setContent(const char * c);
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Ion::Storage::Record::ErrorStatus setExpressionContent(Poincare::Expression & e);
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protected:
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virtual size_t metaDataSize() const = 0;
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Ion::Storage::Record record() const;
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bool isCircularlyDefined(Poincare::Context * context) const;
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mutable Poincare::Expression m_expression;
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mutable Poincare::Layout m_layout;
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private:
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void * expressionAddressForValue(Ion::Storage::Record::Data recordData) const;
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size_t expressionSizeForValue(Ion::Storage::Record::Data recordData) const;
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mutable int m_circular;
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};
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}
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#endif
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