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#ifndef JINJA2CPP_SRC_RENDERER_H
#define JINJA2CPP_SRC_RENDERER_H
#include "out_stream.h"
#include "lexertk.h"
#include "expression_evaluator.h"
#include "render_context.h"
#include "ast_visitor.h"
#include <jinja2cpp/value.h>
#include <jinja2cpp/utils/i_comparable.h>
#include <iostream>
#include <string>
#include <vector>
#include <memory>
namespace jinja2
{
class IRendererBase : public virtual IComparable
{
public:
virtual ~IRendererBase() = default;
virtual void Render(OutStream& os, RenderContext& values) = 0;
};
class VisitableRendererBase : public IRendererBase, public VisitableStatement
{
};
using RendererPtr = std::shared_ptr<IRendererBase>;
inline bool operator==(const RendererPtr& lhs, const RendererPtr& rhs)
{
if (lhs && rhs && !lhs->IsEqual(*rhs))
return false;
if ((lhs && !rhs) || (!lhs && rhs))
return false;
return true;
}
inline bool operator!=(const RendererPtr& lhs, const RendererPtr& rhs)
{
return !(lhs == rhs);
}
class ComposedRenderer : public VisitableRendererBase
{
public:
VISITABLE_STATEMENT();
void AddRenderer(RendererPtr r)
{
m_renderers.push_back(std::move(r));
}
void Render(OutStream& os, RenderContext& values) override
{
for (auto& r : m_renderers)
r->Render(os, values);
}
bool IsEqual(const IComparable& other) const override
{
auto* val = dynamic_cast<const ComposedRenderer*>(&other);
if (!val)
return false;
return m_renderers == val->m_renderers;
}
private:
std::vector<RendererPtr> m_renderers;
};
class RawTextRenderer : public VisitableRendererBase
{
public:
VISITABLE_STATEMENT();
RawTextRenderer(const void* ptr, size_t len)
: m_ptr(ptr)
, m_length(len)
{
}
void Render(OutStream& os, RenderContext&) override
{
os.WriteBuffer(m_ptr, m_length);
}
bool IsEqual(const IComparable& other) const override
{
auto* val = dynamic_cast<const RawTextRenderer*>(&other);
if (!val)
return false;
if (m_ptr != val->m_ptr)
return false;
return m_length == val->m_length;
}
private:
const void* m_ptr{};
size_t m_length{};
};
class ExpressionRenderer : public VisitableRendererBase
{
public:
VISITABLE_STATEMENT();
explicit ExpressionRenderer(ExpressionEvaluatorPtr<> expr)
: m_expression(std::move(expr))
{
}
void Render(OutStream& os, RenderContext& values) override
{
m_expression->Render(os, values);
}
bool IsEqual(const IComparable& other) const override
{
auto* val = dynamic_cast<const ExpressionRenderer*>(&other);
if (!val)
return false;
return m_expression == val->m_expression;
}
private:
ExpressionEvaluatorPtr<> m_expression;
};
} // namespace jinja2
#endif // JINJA2CPP_SRC_RENDERER_H
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