core/fpdfdoc/cpdf_annot.h

// Copyright 2016 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 CORE_FPDFDOC_CPDF_ANNOT_H_
#define CORE_FPDFDOC_CPDF_ANNOT_H_

#include <map>
#include <memory>

#include "core/fxcrt/fx_coordinates.h"
#include "core/fxcrt/fx_string.h"
#include "core/fxcrt/fx_system.h"
#include "core/fxcrt/maybe_owned.h"

class CFX_RenderDevice;
class CPDF_Array;
class CPDF_Dictionary;
class CPDF_Document;
class CPDF_Form;
class CPDF_Page;
class CPDF_RenderContext;
class CPDF_RenderOptions;
class CPDF_Stream;

class CPDF_Annot {
 public:
  enum AppearanceMode { Normal, Rollover, Down };
  enum class Subtype {
    UNKNOWN = 0,
    TEXT,
    LINK,
    FREETEXT,
    LINE,
    SQUARE,
    CIRCLE,
    POLYGON,
    POLYLINE,
    HIGHLIGHT,
    UNDERLINE,
    SQUIGGLY,
    STRIKEOUT,
    STAMP,
    CARET,
    INK,
    POPUP,
    FILEATTACHMENT,
    SOUND,
    MOVIE,
    WIDGET,
    SCREEN,
    PRINTERMARK,
    TRAPNET,
    WATERMARK,
    THREED,
    RICHMEDIA,
    XFAWIDGET
  };

  static CPDF_Annot::Subtype StringToAnnotSubtype(const ByteString& sSubtype);
  static ByteString AnnotSubtypeToString(CPDF_Annot::Subtype nSubtype);
  static CFX_FloatRect RectFromQuadPointsArray(const CPDF_Array* pArray,
                                               size_t nIndex);
  static CFX_FloatRect BoundingRectFromQuadPoints(
      const CPDF_Dictionary* pAnnotDict);
  static CFX_FloatRect RectFromQuadPoints(const CPDF_Dictionary* pAnnotDict,
                                          size_t nIndex);
  static size_t QuadPointCount(const CPDF_Array* pArray);

  // The second constructor does not take ownership of the dictionary.
  CPDF_Annot(RetainPtr<CPDF_Dictionary> pDict, CPDF_Document* pDocument);
  CPDF_Annot(CPDF_Dictionary* pDict, CPDF_Document* pDocument);
  ~CPDF_Annot();

  CPDF_Annot::Subtype GetSubtype() const;
  uint32_t GetFlags() const;
  CFX_FloatRect GetRect() const;
  CPDF_Document* GetDocument() const { return m_pDocument.Get(); }
  const CPDF_Dictionary* GetAnnotDict() const { return m_pAnnotDict.Get(); }
  CPDF_Dictionary* GetAnnotDict() { return m_pAnnotDict.Get(); }

  bool IsHidden() const;

  bool DrawAppearance(CPDF_Page* pPage,
                      CFX_RenderDevice* pDevice,
                      const CFX_Matrix& mtUser2Device,
                      AppearanceMode mode,
                      const CPDF_RenderOptions* pOptions);
  bool DrawInContext(const CPDF_Page* pPage,
                     CPDF_RenderContext* pContext,
                     const CFX_Matrix* pUser2Device,
                     AppearanceMode mode);

  void ClearCachedAP();
  void DrawBorder(CFX_RenderDevice* pDevice,
                  const CFX_Matrix* pUser2Device,
                  const CPDF_RenderOptions* pOptions);
  CPDF_Form* GetAPForm(const CPDF_Page* pPage, AppearanceMode mode);
  void SetOpenState(bool bOpenState) { m_bOpenState = bOpenState; }
  CPDF_Annot* GetPopupAnnot() const { return m_pPopupAnnot.Get(); }
  void SetPopupAnnot(CPDF_Annot* pAnnot) { m_pPopupAnnot = pAnnot; }

 private:
  void Init();
  void GenerateAPIfNeeded();
  bool ShouldGenerateAP() const;
  bool ShouldDrawAnnotation() const;

  CFX_FloatRect RectForDrawing() const;

  RetainPtr<CPDF_Dictionary> const m_pAnnotDict;
  UnownedPtr<CPDF_Document> const m_pDocument;
  CPDF_Annot::Subtype m_nSubtype;
  std::map<CPDF_Stream*, std::unique_ptr<CPDF_Form>> m_APMap;
  // If non-null, then this is not a popup annotation.
  UnownedPtr<CPDF_Annot> m_pPopupAnnot;
  // |m_bOpenState| is only set for popup annotations.
  bool m_bOpenState = false;
  bool m_bHasGeneratedAP;
  bool m_bIsTextMarkupAnnotation;
};

// Get the AP in an annotation dict for a given appearance mode.
// If |eMode| is not Normal and there is not AP for that mode, falls back to
// the Normal AP.
CPDF_Stream* GetAnnotAP(CPDF_Dictionary* pAnnotDict,
                        CPDF_Annot::AppearanceMode eMode);

// Get the AP in an annotation dict for a given appearance mode.
// No fallbacks to Normal like in GetAnnotAP.
CPDF_Stream* GetAnnotAPNoFallback(CPDF_Dictionary* pAnnotDict,
                                  CPDF_Annot::AppearanceMode eMode);

#endif  // CORE_FPDFDOC_CPDF_ANNOT_H_