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// Copyright 2017 PDFium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
// Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com
#ifndef XFA_FDE_CSS_CFDE_CSSACCELERATOR_H_
#define XFA_FDE_CSS_CFDE_CSSACCELERATOR_H_
#include <memory>
#include <stack>
#include "xfa/fde/css/cfde_csstagcache.h"
class CXFA_CSSTagProvider;
class CFDE_CSSAccelerator {
public:
CFDE_CSSAccelerator();
~CFDE_CSSAccelerator();
void OnEnterTag(CXFA_CSSTagProvider* pTag);
void OnLeaveTag(CXFA_CSSTagProvider* pTag);
void Clear() {
std::stack<std::unique_ptr<CFDE_CSSTagCache>> tmp;
stack_.swap(tmp);
}
CFDE_CSSTagCache* top() const {
if (stack_.empty())
return nullptr;
return stack_.top().get();
}
private:
std::stack<std::unique_ptr<CFDE_CSSTagCache>> stack_;
};
#endif // XFA_FDE_CSS_CFDE_CSSACCELERATOR_H_
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