| // 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_ |