Rename PWL_FooBar files to cpwl_foo_bar.

Change-Id: I7ed0ba0acbbee291e285555974ebf50c0073668f
Reviewed-on: https://pdfium-review.googlesource.com/6250
Reviewed-by: Tom Sepez <tsepez@chromium.org>
Commit-Queue: Lei Zhang <thestig@chromium.org>

1 files changed, 863 insertions, 0 deletions

diff --git a/fpdfsdk/pdfwindow/cpwl_edit.cpp b/fpdfsdk/pdfwindow/cpwl_edit.cpp
new file mode 100644
index 0000000000..fd785e0603
--- /dev/null
+++ b/fpdfsdk/pdfwindow/cpwl_edit.cpp
@@ -0,0 +1,863 @@
+// 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
+
+#include "fpdfsdk/pdfwindow/cpwl_edit.h"
+
+#include <algorithm>
+#include <memory>
+#include <vector>
+
+#include "core/fpdfapi/font/cpdf_font.h"
+#include "core/fpdfdoc/cpvt_word.h"
+#include "core/fxcrt/fx_safe_types.h"
+#include "core/fxcrt/xml/cxml_content.h"
+#include "core/fxcrt/xml/cxml_element.h"
+#include "core/fxge/cfx_graphstatedata.h"
+#include "core/fxge/cfx_pathdata.h"
+#include "core/fxge/cfx_renderdevice.h"
+#include "core/fxge/fx_font.h"
+#include "fpdfsdk/fxedit/fxet_edit.h"
+#include "fpdfsdk/pdfwindow/cpwl_caret.h"
+#include "fpdfsdk/pdfwindow/cpwl_edit_ctrl.h"
+#include "fpdfsdk/pdfwindow/cpwl_font_map.h"
+#include "fpdfsdk/pdfwindow/cpwl_scroll_bar.h"
+#include "fpdfsdk/pdfwindow/cpwl_utils.h"
+#include "fpdfsdk/pdfwindow/cpwl_wnd.h"
+#include "public/fpdf_fwlevent.h"
+#include "third_party/base/stl_util.h"
+
+CPWL_Edit::CPWL_Edit() : m_bFocus(false) {}
+
+CPWL_Edit::~CPWL_Edit() {
+  ASSERT(!m_bFocus);
+}
+
+CFX_ByteString CPWL_Edit::GetClassName() const {
+  return PWL_CLASSNAME_EDIT;
+}
+
+void CPWL_Edit::OnDestroy() {}
+
+void CPWL_Edit::SetText(const CFX_WideString& csText) {
+  CFX_WideString swText = csText;
+  if (!HasFlag(PES_RICH)) {
+    m_pEdit->SetText(swText);
+    return;
+  }
+
+  CFX_ByteString sValue = CFX_ByteString::FromUnicode(swText);
+  std::unique_ptr<CXML_Element> pXML(
+      CXML_Element::Parse(sValue.c_str(), sValue.GetLength()));
+  if (!pXML) {
+    m_pEdit->SetText(swText);
+    return;
+  }
+  swText.clear();
+
+  bool bFirst = true;
+  int32_t nCount = pXML->CountChildren();
+  for (int32_t i = 0; i < nCount; i++) {
+    CXML_Element* pSubElement = ToElement(pXML->GetChild(i));
+    if (!pSubElement || !pSubElement->GetTagName().EqualNoCase("p"))
+      continue;
+
+    CFX_WideString swSection;
+    int nSubChild = pSubElement->CountChildren();
+    for (int32_t j = 0; j < nSubChild; j++) {
+      CXML_Content* pSubContent = ToContent(pSubElement->GetChild(j));
+      if (pSubContent)
+        swSection += pSubContent->m_Content;
+    }
+    if (bFirst)
+      bFirst = false;
+    else
+      swText += FWL_VKEY_Return;
+    swText += swSection;
+  }
+
+  m_pEdit->SetText(swText);
+}
+
+void CPWL_Edit::RePosChildWnd() {
+  if (CPWL_ScrollBar* pVSB = GetVScrollBar()) {
+    CFX_FloatRect rcWindow = m_rcOldWindow;
+    CFX_FloatRect rcVScroll =
+        CFX_FloatRect(rcWindow.right, rcWindow.bottom,
+                      rcWindow.right + PWL_SCROLLBAR_WIDTH, rcWindow.top);
+    pVSB->Move(rcVScroll, true, false);
+  }
+
+  if (m_pEditCaret && !HasFlag(PES_TEXTOVERFLOW))
+    m_pEditCaret->SetClipRect(CPWL_Utils::InflateRect(
+        GetClientRect(), 1.0f));  // +1 for caret beside border
+
+  CPWL_EditCtrl::RePosChildWnd();
+}
+
+CFX_FloatRect CPWL_Edit::GetClientRect() const {
+  CFX_FloatRect rcClient = CPWL_Utils::DeflateRect(
+      GetWindowRect(), (float)(GetBorderWidth() + GetInnerBorderWidth()));
+
+  if (CPWL_ScrollBar* pVSB = GetVScrollBar()) {
+    if (pVSB->IsVisible()) {
+      rcClient.right -= PWL_SCROLLBAR_WIDTH;
+    }
+  }
+
+  return rcClient;
+}
+
+void CPWL_Edit::SetAlignFormatV(PWL_EDIT_ALIGNFORMAT_V nFormat, bool bPaint) {
+  m_pEdit->SetAlignmentV((int32_t)nFormat, bPaint);
+}
+
+bool CPWL_Edit::CanSelectAll() const {
+  return GetSelectWordRange() != m_pEdit->GetWholeWordRange();
+}
+
+bool CPWL_Edit::CanClear() const {
+  return !IsReadOnly() && m_pEdit->IsSelected();
+}
+
+bool CPWL_Edit::CanCopy() const {
+  return !HasFlag(PES_PASSWORD) && !HasFlag(PES_NOREAD) &&
+         m_pEdit->IsSelected();
+}
+
+bool CPWL_Edit::CanCut() const {
+  return CanCopy() && !IsReadOnly();
+}
+void CPWL_Edit::CutText() {
+  if (!CanCut())
+    return;
+  m_pEdit->Clear();
+}
+
+void CPWL_Edit::OnCreated() {
+  CPWL_EditCtrl::OnCreated();
+
+  if (CPWL_ScrollBar* pScroll = GetVScrollBar()) {
+    pScroll->RemoveFlag(PWS_AUTOTRANSPARENT);
+    pScroll->SetTransparency(255);
+  }
+
+  SetParamByFlag();
+
+  m_rcOldWindow = GetWindowRect();
+
+  m_pEdit->SetOprNotify(this);
+  m_pEdit->EnableOprNotify(true);
+}
+
+void CPWL_Edit::SetParamByFlag() {
+  if (HasFlag(PES_RIGHT)) {
+    m_pEdit->SetAlignmentH(2, false);
+  } else if (HasFlag(PES_MIDDLE)) {
+    m_pEdit->SetAlignmentH(1, false);
+  } else {
+    m_pEdit->SetAlignmentH(0, false);
+  }
+
+  if (HasFlag(PES_BOTTOM)) {
+    m_pEdit->SetAlignmentV(2, false);
+  } else if (HasFlag(PES_CENTER)) {
+    m_pEdit->SetAlignmentV(1, false);
+  } else {
+    m_pEdit->SetAlignmentV(0, false);
+  }
+
+  if (HasFlag(PES_PASSWORD)) {
+    m_pEdit->SetPasswordChar('*', false);
+  }
+
+  m_pEdit->SetMultiLine(HasFlag(PES_MULTILINE), false);
+  m_pEdit->SetAutoReturn(HasFlag(PES_AUTORETURN), false);
+  m_pEdit->SetAutoFontSize(HasFlag(PWS_AUTOFONTSIZE), false);
+  m_pEdit->SetAutoScroll(HasFlag(PES_AUTOSCROLL), false);
+  m_pEdit->EnableUndo(HasFlag(PES_UNDO));
+
+  if (HasFlag(PES_TEXTOVERFLOW)) {
+    SetClipRect(CFX_FloatRect(0.0f, 0.0f, 0.0f, 0.0f));
+    m_pEdit->SetTextOverflow(true, false);
+  } else {
+    if (m_pEditCaret) {
+      m_pEditCaret->SetClipRect(CPWL_Utils::InflateRect(
+          GetClientRect(), 1.0f));  // +1 for caret beside border
+    }
+  }
+}
+
+void CPWL_Edit::GetThisAppearanceStream(CFX_ByteTextBuf& sAppStream) {
+  CPWL_Wnd::GetThisAppearanceStream(sAppStream);
+
+  CFX_FloatRect rcClient = GetClientRect();
+  CFX_ByteTextBuf sLine;
+
+  int32_t nCharArray = m_pEdit->GetCharArray();
+
+  if (nCharArray > 0) {
+    switch (GetBorderStyle()) {
+      case BorderStyle::SOLID: {
+        sLine << "q\n"
+              << GetBorderWidth() << " w\n"
+              << CPWL_Utils::GetColorAppStream(GetBorderColor(), false)
+                     .AsStringC()
+              << " 2 J 0 j\n";
+
+        for (int32_t i = 1; i < nCharArray; i++) {
+          sLine << rcClient.left +
+                       ((rcClient.right - rcClient.left) / nCharArray) * i
+                << " " << rcClient.bottom << " m\n"
+                << rcClient.left +
+                       ((rcClient.right - rcClient.left) / nCharArray) * i
+                << " " << rcClient.top << " l S\n";
+        }
+
+        sLine << "Q\n";
+        break;
+      }
+      case BorderStyle::DASH: {
+        sLine << "q\n"
+              << GetBorderWidth() << " w\n"
+              << CPWL_Utils::GetColorAppStream(GetBorderColor(), false)
+                     .AsStringC()
+              << " 2 J 0 j\n"
+              << "[" << GetBorderDash().nDash << " " << GetBorderDash().nGap
+              << "] " << GetBorderDash().nPhase << " d\n";
+
+        for (int32_t i = 1; i < nCharArray; i++) {
+          sLine << rcClient.left +
+                       ((rcClient.right - rcClient.left) / nCharArray) * i
+                << " " << rcClient.bottom << " m\n"
+                << rcClient.left +
+                       ((rcClient.right - rcClient.left) / nCharArray) * i
+                << " " << rcClient.top << " l S\n";
+        }
+
+        sLine << "Q\n";
+        break;
+      }
+      default:
+        break;
+    }
+  }
+
+  sAppStream << sLine;
+
+  CFX_ByteTextBuf sText;
+  CFX_PointF ptOffset;
+  CPVT_WordRange wrWhole = m_pEdit->GetWholeWordRange();
+  CPVT_WordRange wrSelect = GetSelectWordRange();
+  CPVT_WordRange wrVisible =
+      HasFlag(PES_TEXTOVERFLOW) ? wrWhole : m_pEdit->GetVisibleWordRange();
+
+  CPVT_WordRange wrSelBefore(wrWhole.BeginPos, wrSelect.BeginPos);
+  CPVT_WordRange wrSelAfter(wrSelect.EndPos, wrWhole.EndPos);
+  CPVT_WordRange wrTemp =
+      CPWL_Utils::OverlapWordRange(GetSelectWordRange(), wrVisible);
+  CFX_ByteString sEditSel =
+      CPWL_Utils::GetEditSelAppStream(m_pEdit.get(), ptOffset, &wrTemp);
+
+  if (sEditSel.GetLength() > 0)
+    sText << CPWL_Utils::GetColorAppStream(PWL_DEFAULT_SELBACKCOLOR).AsStringC()
+          << sEditSel.AsStringC();
+
+  wrTemp = CPWL_Utils::OverlapWordRange(wrVisible, wrSelBefore);
+  CFX_ByteString sEditBefore = CPWL_Utils::GetEditAppStream(
+      m_pEdit.get(), ptOffset, &wrTemp, !HasFlag(PES_CHARARRAY),
+      m_pEdit->GetPasswordChar());
+
+  if (sEditBefore.GetLength() > 0)
+    sText << "BT\n"
+          << CPWL_Utils::GetColorAppStream(GetTextColor()).AsStringC()
+          << sEditBefore.AsStringC() << "ET\n";
+
+  wrTemp = CPWL_Utils::OverlapWordRange(wrVisible, wrSelect);
+  CFX_ByteString sEditMid = CPWL_Utils::GetEditAppStream(
+      m_pEdit.get(), ptOffset, &wrTemp, !HasFlag(PES_CHARARRAY),
+      m_pEdit->GetPasswordChar());
+
+  if (sEditMid.GetLength() > 0)
+    sText << "BT\n"
+          << CPWL_Utils::GetColorAppStream(CPWL_Color(COLORTYPE_GRAY, 1))
+                 .AsStringC()
+          << sEditMid.AsStringC() << "ET\n";
+
+  wrTemp = CPWL_Utils::OverlapWordRange(wrVisible, wrSelAfter);
+  CFX_ByteString sEditAfter = CPWL_Utils::GetEditAppStream(
+      m_pEdit.get(), ptOffset, &wrTemp, !HasFlag(PES_CHARARRAY),
+      m_pEdit->GetPasswordChar());
+
+  if (sEditAfter.GetLength() > 0)
+    sText << "BT\n"
+          << CPWL_Utils::GetColorAppStream(GetTextColor()).AsStringC()
+          << sEditAfter.AsStringC() << "ET\n";
+
+  if (sText.GetLength() > 0) {
+    CFX_FloatRect rect = GetClientRect();
+    sAppStream << "q\n/Tx BMC\n";
+
+    if (!HasFlag(PES_TEXTOVERFLOW))
+      sAppStream << rect.left << " " << rect.bottom << " "
+                 << rect.right - rect.left << " " << rect.top - rect.bottom
+                 << " re W n\n";
+
+    sAppStream << sText;
+
+    sAppStream << "EMC\nQ\n";
+  }
+}
+
+void CPWL_Edit::DrawThisAppearance(CFX_RenderDevice* pDevice,
+                                   CFX_Matrix* pUser2Device) {
+  CPWL_Wnd::DrawThisAppearance(pDevice, pUser2Device);
+
+  CFX_FloatRect rcClient = GetClientRect();
+  CFX_ByteTextBuf sLine;
+
+  int32_t nCharArray = m_pEdit->GetCharArray();
+  FX_SAFE_INT32 nCharArraySafe = nCharArray;
+  nCharArraySafe -= 1;
+  nCharArraySafe *= 2;
+
+  if (nCharArray > 0 && nCharArraySafe.IsValid()) {
+    switch (GetBorderStyle()) {
+      case BorderStyle::SOLID: {
+        CFX_GraphStateData gsd;
+        gsd.m_LineWidth = (float)GetBorderWidth();
+
+        CFX_PathData path;
+
+        for (int32_t i = 0; i < nCharArray - 1; i++) {
+          path.AppendPoint(
+              CFX_PointF(
+                  rcClient.left +
+                      ((rcClient.right - rcClient.left) / nCharArray) * (i + 1),
+                  rcClient.bottom),
+              FXPT_TYPE::MoveTo, false);
+          path.AppendPoint(
+              CFX_PointF(
+                  rcClient.left +
+                      ((rcClient.right - rcClient.left) / nCharArray) * (i + 1),
+                  rcClient.top),
+              FXPT_TYPE::LineTo, false);
+        }
+        if (!path.GetPoints().empty()) {
+          pDevice->DrawPath(&path, pUser2Device, &gsd, 0,
+                            GetBorderColor().ToFXColor(255), FXFILL_ALTERNATE);
+        }
+        break;
+      }
+      case BorderStyle::DASH: {
+        CFX_GraphStateData gsd;
+        gsd.m_LineWidth = (float)GetBorderWidth();
+
+        gsd.SetDashCount(2);
+        gsd.m_DashArray[0] = (float)GetBorderDash().nDash;
+        gsd.m_DashArray[1] = (float)GetBorderDash().nGap;
+        gsd.m_DashPhase = (float)GetBorderDash().nPhase;
+
+        CFX_PathData path;
+        for (int32_t i = 0; i < nCharArray - 1; i++) {
+          path.AppendPoint(
+              CFX_PointF(
+                  rcClient.left +
+                      ((rcClient.right - rcClient.left) / nCharArray) * (i + 1),
+                  rcClient.bottom),
+              FXPT_TYPE::MoveTo, false);
+          path.AppendPoint(
+              CFX_PointF(
+                  rcClient.left +
+                      ((rcClient.right - rcClient.left) / nCharArray) * (i + 1),
+                  rcClient.top),
+              FXPT_TYPE::LineTo, false);
+        }
+        if (!path.GetPoints().empty()) {
+          pDevice->DrawPath(&path, pUser2Device, &gsd, 0,
+                            GetBorderColor().ToFXColor(255), FXFILL_ALTERNATE);
+        }
+        break;
+      }
+      default:
+        break;
+    }
+  }
+
+  CFX_FloatRect rcClip;
+  CPVT_WordRange wrRange = m_pEdit->GetVisibleWordRange();
+  CPVT_WordRange* pRange = nullptr;
+  if (!HasFlag(PES_TEXTOVERFLOW)) {
+    rcClip = GetClientRect();
+    pRange = &wrRange;
+  }
+
+  CFX_SystemHandler* pSysHandler = GetSystemHandler();
+  CFX_Edit::DrawEdit(pDevice, pUser2Device, m_pEdit.get(),
+                     GetTextColor().ToFXColor(GetTransparency()), rcClip,
+                     CFX_PointF(), pRange, pSysHandler, m_pFormFiller.Get());
+}
+
+bool CPWL_Edit::OnLButtonDown(const CFX_PointF& point, uint32_t nFlag) {
+  CPWL_Wnd::OnLButtonDown(point, nFlag);
+
+  if (HasFlag(PES_TEXTOVERFLOW) || ClientHitTest(point)) {
+    if (m_bMouseDown)
+      InvalidateRect();
+
+    m_bMouseDown = true;
+    SetCapture();
+
+    m_pEdit->OnMouseDown(point, IsSHIFTpressed(nFlag), IsCTRLpressed(nFlag));
+  }
+
+  return true;
+}
+
+bool CPWL_Edit::OnLButtonDblClk(const CFX_PointF& point, uint32_t nFlag) {
+  CPWL_Wnd::OnLButtonDblClk(point, nFlag);
+
+  if (HasFlag(PES_TEXTOVERFLOW) || ClientHitTest(point)) {
+    m_pEdit->SelectAll();
+  }
+
+  return true;
+}
+
+bool CPWL_Edit::OnRButtonUp(const CFX_PointF& point, uint32_t nFlag) {
+  if (m_bMouseDown)
+    return false;
+
+  CPWL_Wnd::OnRButtonUp(point, nFlag);
+
+  if (!HasFlag(PES_TEXTOVERFLOW) && !ClientHitTest(point))
+    return true;
+
+  CFX_SystemHandler* pSH = GetSystemHandler();
+  if (!pSH)
+    return false;
+
+  SetFocus();
+
+  return false;
+}
+
+void CPWL_Edit::OnSetFocus() {
+  SetEditCaret(true);
+  if (!IsReadOnly()) {
+    if (IPWL_FocusHandler* pFocusHandler = GetFocusHandler())
+      pFocusHandler->OnSetFocus(this);
+  }
+  m_bFocus = true;
+}
+
+void CPWL_Edit::OnKillFocus() {
+  ShowVScrollBar(false);
+  m_pEdit->SelectNone();
+  SetCaret(false, CFX_PointF(), CFX_PointF());
+  SetCharSet(FX_CHARSET_ANSI);
+  m_bFocus = false;
+}
+
+void CPWL_Edit::SetCharSpace(float fCharSpace) {
+  m_pEdit->SetCharSpace(fCharSpace);
+}
+
+CFX_ByteString CPWL_Edit::GetSelectAppearanceStream(
+    const CFX_PointF& ptOffset) const {
+  CPVT_WordRange wr = GetSelectWordRange();
+  return CPWL_Utils::GetEditSelAppStream(m_pEdit.get(), ptOffset, &wr);
+}
+
+CPVT_WordRange CPWL_Edit::GetSelectWordRange() const {
+  if (m_pEdit->IsSelected()) {
+    int32_t nStart = -1;
+    int32_t nEnd = -1;
+
+    m_pEdit->GetSel(nStart, nEnd);
+
+    CPVT_WordPlace wpStart = m_pEdit->WordIndexToWordPlace(nStart);
+    CPVT_WordPlace wpEnd = m_pEdit->WordIndexToWordPlace(nEnd);
+
+    return CPVT_WordRange(wpStart, wpEnd);
+  }
+
+  return CPVT_WordRange();
+}
+
+CFX_ByteString CPWL_Edit::GetTextAppearanceStream(
+    const CFX_PointF& ptOffset) const {
+  CFX_ByteTextBuf sRet;
+  CFX_ByteString sEdit = CPWL_Utils::GetEditAppStream(m_pEdit.get(), ptOffset);
+  if (sEdit.GetLength() > 0) {
+    sRet << "BT\n"
+         << CPWL_Utils::GetColorAppStream(GetTextColor()).AsStringC()
+         << sEdit.AsStringC() << "ET\n";
+  }
+  return sRet.MakeString();
+}
+
+CFX_ByteString CPWL_Edit::GetCaretAppearanceStream(
+    const CFX_PointF& ptOffset) const {
+  if (m_pEditCaret)
+    return m_pEditCaret->GetCaretAppearanceStream(ptOffset);
+
+  return CFX_ByteString();
+}
+
+CFX_PointF CPWL_Edit::GetWordRightBottomPoint(const CPVT_WordPlace& wpWord) {
+  CFX_Edit_Iterator* pIterator = m_pEdit->GetIterator();
+  CPVT_WordPlace wpOld = pIterator->GetAt();
+  pIterator->SetAt(wpWord);
+
+  CFX_PointF pt;
+  CPVT_Word word;
+  if (pIterator->GetWord(word)) {
+    pt = CFX_PointF(word.ptWord.x + word.fWidth, word.ptWord.y + word.fDescent);
+  }
+  pIterator->SetAt(wpOld);
+  return pt;
+}
+
+bool CPWL_Edit::IsTextFull() const {
+  return m_pEdit->IsTextFull();
+}
+
+float CPWL_Edit::GetCharArrayAutoFontSize(CPDF_Font* pFont,
+                                          const CFX_FloatRect& rcPlate,
+                                          int32_t nCharArray) {
+  if (pFont && !pFont->IsStandardFont()) {
+    FX_RECT rcBBox;
+    pFont->GetFontBBox(rcBBox);
+
+    CFX_FloatRect rcCell = rcPlate;
+    float xdiv = rcCell.Width() / nCharArray * 1000.0f / rcBBox.Width();
+    float ydiv = -rcCell.Height() * 1000.0f / rcBBox.Height();
+
+    return xdiv < ydiv ? xdiv : ydiv;
+  }
+
+  return 0.0f;
+}
+
+void CPWL_Edit::SetCharArray(int32_t nCharArray) {
+  if (HasFlag(PES_CHARARRAY) && nCharArray > 0) {
+    m_pEdit->SetCharArray(nCharArray);
+    m_pEdit->SetTextOverflow(true, true);
+
+    if (HasFlag(PWS_AUTOFONTSIZE)) {
+      if (IPVT_FontMap* pFontMap = GetFontMap()) {
+        float fFontSize = GetCharArrayAutoFontSize(pFontMap->GetPDFFont(0),
+                                                   GetClientRect(), nCharArray);
+        if (fFontSize > 0.0f) {
+          m_pEdit->SetAutoFontSize(false, true);
+          m_pEdit->SetFontSize(fFontSize);
+        }
+      }
+    }
+  }
+}
+
+void CPWL_Edit::SetLimitChar(int32_t nLimitChar) {
+  m_pEdit->SetLimitChar(nLimitChar);
+}
+
+void CPWL_Edit::ReplaceSel(const CFX_WideString& wsText) {
+  m_pEdit->Clear();
+  m_pEdit->InsertText(wsText, FX_CHARSET_Default);
+}
+
+CFX_FloatRect CPWL_Edit::GetFocusRect() const {
+  return CFX_FloatRect();
+}
+
+void CPWL_Edit::ShowVScrollBar(bool bShow) {
+  if (CPWL_ScrollBar* pScroll = GetVScrollBar()) {
+    if (bShow) {
+      if (!pScroll->IsVisible()) {
+        pScroll->SetVisible(true);
+        CFX_FloatRect rcWindow = GetWindowRect();
+        m_rcOldWindow = rcWindow;
+        rcWindow.right += PWL_SCROLLBAR_WIDTH;
+        Move(rcWindow, true, true);
+      }
+    } else {
+      if (pScroll->IsVisible()) {
+        pScroll->SetVisible(false);
+        Move(m_rcOldWindow, true, true);
+      }
+    }
+  }
+}
+
+bool CPWL_Edit::IsVScrollBarVisible() const {
+  if (CPWL_ScrollBar* pScroll = GetVScrollBar()) {
+    return pScroll->IsVisible();
+  }
+
+  return false;
+}
+
+bool CPWL_Edit::OnKeyDown(uint16_t nChar, uint32_t nFlag) {
+  if (m_bMouseDown)
+    return true;
+
+  if (nChar == FWL_VKEY_Delete) {
+    if (m_pFillerNotify) {
+      bool bRC = true;
+      bool bExit = false;
+      CFX_WideString strChange;
+      CFX_WideString strChangeEx;
+
+      int nSelStart = 0;
+      int nSelEnd = 0;
+      GetSel(nSelStart, nSelEnd);
+
+      if (nSelStart == nSelEnd)
+        nSelEnd = nSelStart + 1;
+      m_pFillerNotify->OnBeforeKeyStroke(GetAttachedData(), strChange,
+                                         strChangeEx, nSelStart, nSelEnd, true,
+                                         bRC, bExit, nFlag);
+      if (!bRC)
+        return false;
+      if (bExit)
+        return false;
+    }
+  }
+
+  bool bRet = CPWL_EditCtrl::OnKeyDown(nChar, nFlag);
+
+  // In case of implementation swallow the OnKeyDown event.
+  if (IsProceedtoOnChar(nChar, nFlag))
+    return true;
+
+  return bRet;
+}
+
+/**
+ *In case of implementation swallow the OnKeyDown event.
+ *If the event is swallowed, implementation may do other unexpected things,
+ *which is not the control means to do.
+ */
+bool CPWL_Edit::IsProceedtoOnChar(uint16_t nKeyCode, uint32_t nFlag) {
+  bool bCtrl = IsCTRLpressed(nFlag);
+  bool bAlt = IsALTpressed(nFlag);
+  if (bCtrl && !bAlt) {
+    // hot keys for edit control.
+    switch (nKeyCode) {
+      case 'C':
+      case 'V':
+      case 'X':
+      case 'A':
+      case 'Z':
+        return true;
+      default:
+        break;
+    }
+  }
+  // control characters.
+  switch (nKeyCode) {
+    case FWL_VKEY_Escape:
+    case FWL_VKEY_Back:
+    case FWL_VKEY_Return:
+    case FWL_VKEY_Space:
+      return true;
+    default:
+      return false;
+  }
+}
+
+bool CPWL_Edit::OnChar(uint16_t nChar, uint32_t nFlag) {
+  if (m_bMouseDown)
+    return true;
+
+  bool bRC = true;
+  bool bExit = false;
+
+  if (!IsCTRLpressed(nFlag)) {
+    if (m_pFillerNotify) {
+      CFX_WideString swChange;
+
+      int nSelStart = 0;
+      int nSelEnd = 0;
+      GetSel(nSelStart, nSelEnd);
+
+      switch (nChar) {
+        case FWL_VKEY_Back:
+          if (nSelStart == nSelEnd)
+            nSelStart = nSelEnd - 1;
+          break;
+        case FWL_VKEY_Return:
+          break;
+        default:
+          swChange += nChar;
+          break;
+      }
+
+      CFX_WideString strChangeEx;
+      m_pFillerNotify->OnBeforeKeyStroke(GetAttachedData(), swChange,
+                                         strChangeEx, nSelStart, nSelEnd, true,
+                                         bRC, bExit, nFlag);
+    }
+  }
+
+  if (!bRC)
+    return true;
+  if (bExit)
+    return false;
+
+  if (IPVT_FontMap* pFontMap = GetFontMap()) {
+    int32_t nOldCharSet = GetCharSet();
+    int32_t nNewCharSet =
+        pFontMap->CharSetFromUnicode(nChar, FX_CHARSET_Default);
+    if (nOldCharSet != nNewCharSet) {
+      SetCharSet(nNewCharSet);
+    }
+  }
+
+  return CPWL_EditCtrl::OnChar(nChar, nFlag);
+}
+
+bool CPWL_Edit::OnMouseWheel(short zDelta,
+                             const CFX_PointF& point,
+                             uint32_t nFlag) {
+  if (HasFlag(PES_MULTILINE)) {
+    CFX_PointF ptScroll = GetScrollPos();
+
+    if (zDelta > 0) {
+      ptScroll.y += GetFontSize();
+    } else {
+      ptScroll.y -= GetFontSize();
+    }
+    SetScrollPos(ptScroll);
+
+    return true;
+  }
+
+  return false;
+}
+
+void CPWL_Edit::OnInsertReturn(const CPVT_WordPlace& place,
+                               const CPVT_WordPlace& oldplace) {
+  if (HasFlag(PES_SPELLCHECK)) {
+    m_pEdit->RefreshWordRange(CombineWordRange(GetLatinWordsRange(oldplace),
+                                               GetLatinWordsRange(place)));
+  }
+}
+
+void CPWL_Edit::OnBackSpace(const CPVT_WordPlace& place,
+                            const CPVT_WordPlace& oldplace) {
+  if (HasFlag(PES_SPELLCHECK)) {
+    m_pEdit->RefreshWordRange(CombineWordRange(GetLatinWordsRange(oldplace),
+                                               GetLatinWordsRange(place)));
+  }
+}
+
+void CPWL_Edit::OnDelete(const CPVT_WordPlace& place,
+                         const CPVT_WordPlace& oldplace) {
+  if (HasFlag(PES_SPELLCHECK)) {
+    m_pEdit->RefreshWordRange(CombineWordRange(GetLatinWordsRange(oldplace),
+                                               GetLatinWordsRange(place)));
+  }
+}
+
+void CPWL_Edit::OnClear(const CPVT_WordPlace& place,
+                        const CPVT_WordPlace& oldplace) {
+  if (HasFlag(PES_SPELLCHECK)) {
+    m_pEdit->RefreshWordRange(CombineWordRange(GetLatinWordsRange(oldplace),
+                                               GetLatinWordsRange(place)));
+  }
+}
+
+void CPWL_Edit::OnInsertWord(const CPVT_WordPlace& place,
+                             const CPVT_WordPlace& oldplace) {
+  if (HasFlag(PES_SPELLCHECK)) {
+    m_pEdit->RefreshWordRange(CombineWordRange(GetLatinWordsRange(oldplace),
+                                               GetLatinWordsRange(place)));
+  }
+}
+
+void CPWL_Edit::OnInsertText(const CPVT_WordPlace& place,
+                             const CPVT_WordPlace& oldplace) {
+  if (HasFlag(PES_SPELLCHECK)) {
+    m_pEdit->RefreshWordRange(CombineWordRange(GetLatinWordsRange(oldplace),
+                                               GetLatinWordsRange(place)));
+  }
+}
+
+CPVT_WordRange CPWL_Edit::CombineWordRange(const CPVT_WordRange& wr1,
+                                           const CPVT_WordRange& wr2) {
+  return CPVT_WordRange(std::min(wr1.BeginPos, wr2.BeginPos),
+                        std::max(wr1.EndPos, wr2.EndPos));
+}
+
+CPVT_WordRange CPWL_Edit::GetLatinWordsRange(const CFX_PointF& point) const {
+  return GetSameWordsRange(m_pEdit->SearchWordPlace(point), true, false);
+}
+
+CPVT_WordRange CPWL_Edit::GetLatinWordsRange(
+    const CPVT_WordPlace& place) const {
+  return GetSameWordsRange(place, true, false);
+}
+
+CPVT_WordRange CPWL_Edit::GetArabicWordsRange(
+    const CPVT_WordPlace& place) const {
+  return GetSameWordsRange(place, false, true);
+}
+
+#define PWL_ISARABICWORD(word) \
+  ((word >= 0x0600 && word <= 0x06FF) || (word >= 0xFB50 && word <= 0xFEFC))
+
+CPVT_WordRange CPWL_Edit::GetSameWordsRange(const CPVT_WordPlace& place,
+                                            bool bLatin,
+                                            bool bArabic) const {
+  CPVT_WordRange range;
+
+  CFX_Edit_Iterator* pIterator = m_pEdit->GetIterator();
+  CPVT_Word wordinfo;
+  CPVT_WordPlace wpStart(place), wpEnd(place);
+  pIterator->SetAt(place);
+
+  if (bLatin) {
+    while (pIterator->NextWord()) {
+      if (!pIterator->GetWord(wordinfo) ||
+          !FX_EDIT_ISLATINWORD(wordinfo.Word)) {
+        break;
+      }
+
+      wpEnd = pIterator->GetAt();
+    }
+  } else if (bArabic) {
+    while (pIterator->NextWord()) {
+      if (!pIterator->GetWord(wordinfo) || !PWL_ISARABICWORD(wordinfo.Word))
+        break;
+
+      wpEnd = pIterator->GetAt();
+    }
+  }
+
+  pIterator->SetAt(place);
+
+  if (bLatin) {
+    do {
+      if (!pIterator->GetWord(wordinfo) ||
+          !FX_EDIT_ISLATINWORD(wordinfo.Word)) {
+        break;
+      }
+
+      wpStart = pIterator->GetAt();
+    } while (pIterator->PrevWord());
+  } else if (bArabic) {
+    do {
+      if (!pIterator->GetWord(wordinfo) || !PWL_ISARABICWORD(wordinfo.Word))
+        break;
+
+      wpStart = pIterator->GetAt();
+    } while (pIterator->PrevWord());
+  }
+
+  range.Set(wpStart, wpEnd);
+  return range;
+}