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      1 // Copyright 2016 PDFium Authors. All rights reserved.
      2 // Use of this source code is governed by a BSD-style license that can be
      3 // found in the LICENSE file.
      4 
      5 // Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com
      6 
      7 #ifndef CORE_FPDFAPI_PAGE_CPDF_PAGE_H_
      8 #define CORE_FPDFAPI_PAGE_CPDF_PAGE_H_
      9 
     10 #include <memory>
     11 
     12 #include "core/fpdfapi/page/cpdf_pageobjectholder.h"
     13 #include "core/fxcrt/fx_coordinates.h"
     14 #include "core/fxcrt/fx_system.h"
     15 
     16 class CPDF_Dictionary;
     17 class CPDF_Document;
     18 class CPDF_Object;
     19 class CPDF_PageRenderCache;
     20 class CPDF_PageRenderContext;
     21 
     22 class CPDF_Page : public CPDF_PageObjectHolder {
     23  public:
     24   class View {};  // Caller implements as desired, empty here due to layering.
     25 
     26   CPDF_Page(CPDF_Document* pDocument,
     27             CPDF_Dictionary* pPageDict,
     28             bool bPageCache);
     29   ~CPDF_Page() override;
     30 
     31   // CPDF_PageObjectHolder
     32   bool IsPage() const override;
     33 
     34   void ParseContent();
     35 
     36   CFX_Matrix GetDisplayMatrix(int xPos,
     37                               int yPos,
     38                               int xSize,
     39                               int ySize,
     40                               int iRotate) const;
     41 
     42   float GetPageWidth() const { return m_PageWidth; }
     43   float GetPageHeight() const { return m_PageHeight; }
     44   CFX_FloatRect GetPageBBox() const { return m_BBox; }
     45   int GetPageRotation() const;
     46   CPDF_PageRenderCache* GetRenderCache() const { return m_pPageRender.get(); }
     47 
     48   CPDF_PageRenderContext* GetRenderContext() const {
     49     return m_pRenderContext.get();
     50   }
     51   void SetRenderContext(std::unique_ptr<CPDF_PageRenderContext> pContext);
     52 
     53   View* GetView() const { return m_pView; }
     54   void SetView(View* pView) { m_pView = pView; }
     55 
     56  private:
     57   void StartParse();
     58 
     59   CPDF_Object* GetPageAttr(const ByteString& name) const;
     60   CFX_FloatRect GetBox(const ByteString& name) const;
     61 
     62   float m_PageWidth;
     63   float m_PageHeight;
     64   CFX_Matrix m_PageMatrix;
     65   View* m_pView;
     66   std::unique_ptr<CPDF_PageRenderCache> m_pPageRender;
     67   std::unique_ptr<CPDF_PageRenderContext> m_pRenderContext;
     68 };
     69 
     70 #endif  // CORE_FPDFAPI_PAGE_CPDF_PAGE_H_
     71