Rebuild CFDE_TextEditEngine.

This CL rebuilds the text edit engine in a simpler fashion. Instead of
depending on multiple pages, paragraphs and buffer fields there is a
single text edit engine which contains a gap buffer.

This makes the code easier to understand and follow.

Change-Id: I10fe85603fa9ed15a647eaac2d931f113cd0c7b0
Reviewed-on: https://pdfium-review.googlesource.com/11990
Commit-Queue: dsinclair <dsinclair@chromium.org>
Reviewed-by: Henrique Nakashima <hnakashima@chromium.org>
Reviewed-by: Ryan Harrison <rharrison@chromium.org>

1 files changed, 0 insertions, 76 deletions

diff --git a/xfa/fde/cfde_txtedtbuf.h b/xfa/fde/cfde_txtedtbuf.h
deleted file mode 100644
index e8293d0240..0000000000
--- a/xfa/fde/cfde_txtedtbuf.h
+++ /dev/null
@@ -1,76 +0,0 @@
-// 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 XFA_FDE_CFDE_TXTEDTBUF_H_
-#define XFA_FDE_CFDE_TXTEDTBUF_H_
-
-#include <memory>
-#include <utility>
-#include <vector>
-
-#include "core/fxcrt/fx_basic.h"
-#include "core/fxcrt/fx_system.h"
-#include "core/fxcrt/ifx_chariter.h"
-
-class CFDE_TxtEdtBuf {
- public:
-  class Iterator : public IFX_CharIter {
-   public:
-    Iterator(CFDE_TxtEdtBuf* pBuf, wchar_t wcAlias);
-    ~Iterator() override;
-
-    bool Next(bool bPrev = false) override;
-    wchar_t GetChar() const override;
-
-    void SetAt(int32_t nIndex) override;
-    int32_t GetAt() const override;
-
-    bool IsEOF(bool bTail = true) const override;
-    std::unique_ptr<IFX_CharIter> Clone() const override;
-
-   private:
-    CFDE_TxtEdtBuf* m_pBuf;
-    int32_t m_nCurChunk;
-    int32_t m_nCurIndex;
-    int32_t m_nIndex;
-    wchar_t m_Alias;
-  };
-
-  CFDE_TxtEdtBuf();
-  ~CFDE_TxtEdtBuf();
-
-  int32_t GetTextLength() const { return m_nTotal; }
-  void SetText(const CFX_WideString& wsText);
-  CFX_WideString GetText() const { return GetRange(0, m_nTotal); }
-
-  wchar_t GetCharByIndex(int32_t nIndex) const;
-  CFX_WideString GetRange(int32_t nBegin, int32_t nCount) const;
-
-  void Insert(int32_t nPos, const CFX_WideString& wsText);
-  void Delete(int32_t nIndex, int32_t nLength);
-  void Clear();
-
-  void SetChunkSizeForTesting(size_t size);
-  size_t GetChunkCountForTesting() const { return m_chunks.size(); }
-
- private:
-  class ChunkHeader {
-   public:
-    explicit ChunkHeader(int32_t chunkSize);
-    ~ChunkHeader();
-
-    int32_t nUsed;
-    std::vector<wchar_t> wChars;
-  };
-
-  std::pair<int32_t, int32_t> Index2CP(int32_t nIndex) const;
-
-  int32_t m_chunkSize;
-  int32_t m_nTotal;
-  std::vector<std::unique_ptr<ChunkHeader>> m_chunks;
-};
-
-#endif  // XFA_FDE_CFDE_TXTEDTBUF_H_