Move core/include/fxcrt to core/fxcrt/include.

core/include/fxcrt/fx_bidi.h

-// Copyright 2014 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_INCLUDE_FXCRT_FX_BIDI_H_
-#define CORE_INCLUDE_FXCRT_FX_BIDI_H_
-
-#include <memory>
-#include <vector>
-
-#include "core/include/fxcrt/fx_string.h"
-#include "core/include/fxcrt/fx_system.h"
-
-// Processes characters and group them into segments based on text direction.
-class CFX_BidiChar {
- public:
-  enum Direction { NEUTRAL, LEFT, RIGHT };
-  struct Segment {
-    int32_t start;        // Start position.
-    int32_t count;        // Character count.
-    Direction direction;  // Segment direction.
-  };
-
-  CFX_BidiChar();
-
-  // Append a character and classify it as left, right, or neutral.
-  // Returns true if the character has a different direction than the
-  // existing direction to indicate there is a segment to process.
-  bool AppendChar(FX_WCHAR wch);
-
-  // Call this after the last character has been appended. AppendChar()
-  // must not be called after this.
-  // Returns true if there is still a segment to process.
-  bool EndChar();
-
-  // Call after a change in direction is indicated by the above to get
-  // information about the segment to process.
-  Segment GetSegmentInfo() const { return m_LastSegment; }
-
- private:
-  void StartNewSegment(CFX_BidiChar::Direction direction);
-
-  Segment m_CurrentSegment;
-  Segment m_LastSegment;
-};
-
-class CFX_BidiString {
- public:
-  using const_iterator = std::vector<CFX_BidiChar::Segment>::const_iterator;
-  explicit CFX_BidiString(const CFX_WideString& str);
-
-  // Overall direction is always LEFT or RIGHT, never NEUTRAL.
-  CFX_BidiChar::Direction OverallDirection() const {
-    return m_eOverallDirection;
-  }
-
-  // Force the overall direction to be R2L regardless of what was detected.
-  void SetOverallDirectionRight();
-
-  FX_WCHAR CharAt(size_t x) const { return m_Str[x]; }
-  const_iterator begin() const { return m_Order.begin(); }
-  const_iterator end() const { return m_Order.end(); }
-
- private:
-  const CFX_WideString m_Str;
-  std::unique_ptr<CFX_BidiChar> m_pBidiChar;
-  std::vector<CFX_BidiChar::Segment> m_Order;
-  CFX_BidiChar::Direction m_eOverallDirection;
-};
-
-#endif  // CORE_INCLUDE_FXCRT_FX_BIDI_H_