cpdf_textpagefind.h

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// 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_FPDFTEXT_CPDF_TEXTPAGEFIND_H_
#define CORE_FPDFTEXT_CPDF_TEXTPAGEFIND_H_
 
#include <stddef.h>
 
#include <memory>
#include <vector>
 
#include "core/fxcrt/fx_coordinates.h"
#include "core/fxcrt/unowned_ptr.h"
#include "core/fxcrt/widestring.h"
#include "third_party/abseil-cpp/absl/types/optional.h"
 
class CPDF_TextPage;
 
class CPDF_TextPageFind {
 public:
  struct Options {
    bool bMatchCase = false;
    bool bMatchWholeWord = false;
    bool bConsecutive = false;
  };
 
  static std::unique_ptr<CPDF_TextPageFind> Create(
      const CPDF_TextPage* pTextPage,
      const WideString& findwhat,
      const Options& options,
      absl::optional<size_t> startPos);
 
  ~CPDF_TextPageFind();
 
  bool FindNext();
  bool FindPrev();
  int GetCurOrder() const;
  int GetMatchedCount() const;
 
 private:
  CPDF_TextPageFind(const CPDF_TextPage* pTextPage,
                    const std::vector<WideString>& findwhat_array,
                    const Options& options,
                    absl::optional<size_t> startPos);
 
  // Should be called immediately after construction.
  bool FindFirst();
 
  int GetCharIndex(int index) const;
 
  UnownedPtr<const CPDF_TextPage> const m_pTextPage;
  const WideString m_strText;
  const std::vector<WideString> m_csFindWhatArray;
  absl::optional<size_t> m_findNextStart;
  absl::optional<size_t> m_findPreStart;
  int m_resStart = 0;
  int m_resEnd = -1;
  const Options m_options;
};
 
#endif  // CORE_FPDFTEXT_CPDF_TEXTPAGEFIND_H_