| // Copyright 2016 The PDFium Authors |
| // 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 CORE_FPDFAPI_PAGE_CPDF_PAGE_H_ |
| #define CORE_FPDFAPI_PAGE_CPDF_PAGE_H_ |
| |
| #include <memory> |
| #include <optional> |
| #include <utility> |
| |
| #include "core/fpdfapi/page/cpdf_pageobjectholder.h" |
| #include "core/fpdfapi/page/ipdf_page.h" |
| #include "core/fxcrt/fx_coordinates.h" |
| #include "core/fxcrt/fx_memory.h" |
| #include "core/fxcrt/observed_ptr.h" |
| #include "core/fxcrt/retain_ptr.h" |
| #include "core/fxcrt/unowned_ptr.h" |
| |
| class CPDF_Array; |
| class CPDF_Dictionary; |
| class CPDF_Document; |
| class CPDF_Object; |
| class CPDF_PageImageCache; |
| |
| class CPDF_Page final : public IPDF_Page, public CPDF_PageObjectHolder { |
| public: |
| // Caller implements as desired, exists here due to layering. |
| class View : public Observable { |
| public: |
| virtual void ClearPage(CPDF_Page* pPage) = 0; |
| }; |
| |
| // Data for the render layer to attach to this page. |
| class RenderContextIface { |
| public: |
| virtual ~RenderContextIface() = default; |
| }; |
| |
| class RenderContextClearer { |
| public: |
| FX_STACK_ALLOCATED(); |
| explicit RenderContextClearer(CPDF_Page* pPage); |
| ~RenderContextClearer(); |
| |
| private: |
| UnownedPtr<CPDF_Page> const m_pPage; |
| }; |
| |
| CONSTRUCT_VIA_MAKE_RETAIN; |
| |
| // IPDF_Page: |
| CPDF_Page* AsPDFPage() override; |
| CPDFXFA_Page* AsXFAPage() override; |
| CPDF_Document* GetDocument() const override; |
| float GetPageWidth() const override; |
| float GetPageHeight() const override; |
| CFX_Matrix GetDisplayMatrix(const FX_RECT& rect, int iRotate) const override; |
| std::optional<CFX_PointF> DeviceToPage( |
| const FX_RECT& rect, |
| int rotate, |
| const CFX_PointF& device_point) const override; |
| std::optional<CFX_PointF> PageToDevice( |
| const FX_RECT& rect, |
| int rotate, |
| const CFX_PointF& page_point) const override; |
| |
| // CPDF_PageObjectHolder: |
| bool IsPage() const override; |
| |
| void ParseContent(); |
| const CFX_SizeF& GetPageSize() const { return m_PageSize; } |
| const CFX_Matrix& GetPageMatrix() const { return m_PageMatrix; } |
| int GetPageRotation() const; |
| |
| RetainPtr<CPDF_Array> GetOrCreateAnnotsArray(); |
| RetainPtr<CPDF_Array> GetMutableAnnotsArray(); |
| RetainPtr<const CPDF_Array> GetAnnotsArray() const; |
| |
| void AddPageImageCache(); |
| CPDF_PageImageCache* GetPageImageCache() { return m_pPageImageCache.get(); } |
| RenderContextIface* GetRenderContext() { return m_pRenderContext.get(); } |
| |
| // `pContext` cannot be null. `SetRenderContext()` cannot be called if the |
| // page already has a render context. Use `ClearRenderContext()` to reset the |
| // render context. |
| void SetRenderContext(std::unique_ptr<RenderContextIface> pContext); |
| void ClearRenderContext(); |
| |
| void SetView(View* pView) { m_pView.Reset(pView); } |
| void ClearView(); |
| void UpdateDimensions(); |
| |
| private: |
| CPDF_Page(CPDF_Document* pDocument, RetainPtr<CPDF_Dictionary> pPageDict); |
| ~CPDF_Page() override; |
| |
| RetainPtr<CPDF_Object> GetMutablePageAttr(const ByteString& name); |
| RetainPtr<const CPDF_Object> GetPageAttr(const ByteString& name) const; |
| CFX_FloatRect GetBox(const ByteString& name) const; |
| |
| CFX_SizeF m_PageSize; |
| CFX_Matrix m_PageMatrix; |
| UnownedPtr<CPDF_Document> const m_pPDFDocument; |
| std::unique_ptr<CPDF_PageImageCache> m_pPageImageCache; |
| std::unique_ptr<RenderContextIface> m_pRenderContext; |
| ObservedPtr<View> m_pView; |
| }; |
| |
| #endif // CORE_FPDFAPI_PAGE_CPDF_PAGE_H_ |