Merge IFWL and CFWL classes.

This CL merges the IFWL hierarchy into the CFWL hierachy. All CFWL proxy methods
have been replaced by the IFWL implementations.

Review-Url: https://codereview.chromium.org/2524173002

1 files changed, 0 insertions, 1130 deletions

diff --git a/xfa/fwl/core/ifwl_combobox.cpp b/xfa/fwl/core/ifwl_combobox.cpp
deleted file mode 100644
index 07fa64c43a..0000000000
--- a/xfa/fwl/core/ifwl_combobox.cpp
+++ /dev/null
@@ -1,1130 +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
-
-#include "xfa/fwl/core/ifwl_combobox.h"
-
-#include <algorithm>
-#include <memory>
-#include <utility>
-
-#include "third_party/base/ptr_util.h"
-#include "xfa/fde/cfde_txtedtengine.h"
-#include "xfa/fde/tto/fde_textout.h"
-#include "xfa/fwl/core/cfwl_app.h"
-#include "xfa/fwl/core/cfwl_evteditchanged.h"
-#include "xfa/fwl/core/cfwl_evtpostdropdown.h"
-#include "xfa/fwl/core/cfwl_evtpredropdown.h"
-#include "xfa/fwl/core/cfwl_evtselectchanged.h"
-#include "xfa/fwl/core/cfwl_evttextchanged.h"
-#include "xfa/fwl/core/cfwl_formproxy.h"
-#include "xfa/fwl/core/cfwl_msgkey.h"
-#include "xfa/fwl/core/cfwl_msgkillfocus.h"
-#include "xfa/fwl/core/cfwl_msgmouse.h"
-#include "xfa/fwl/core/cfwl_msgsetfocus.h"
-#include "xfa/fwl/core/cfwl_notedriver.h"
-#include "xfa/fwl/core/cfwl_themebackground.h"
-#include "xfa/fwl/core/cfwl_themepart.h"
-#include "xfa/fwl/core/cfwl_themetext.h"
-#include "xfa/fwl/core/cfwl_widgetmgr.h"
-#include "xfa/fwl/core/ifwl_listbox.h"
-#include "xfa/fwl/core/ifwl_themeprovider.h"
-
-IFWL_ComboBox::IFWL_ComboBox(const CFWL_App* app,
-                             std::unique_ptr<CFWL_WidgetProperties> properties)
-    : IFWL_Widget(app, std::move(properties), nullptr),
-      m_pComboBoxProxy(nullptr),
-      m_bLButtonDown(false),
-      m_iCurSel(-1),
-      m_iBtnState(CFWL_PartState_Normal),
-      m_fComboFormHandler(0) {
-  m_rtClient.Reset();
-  m_rtBtn.Reset();
-  m_rtHandler.Reset();
-
-  if (m_pWidgetMgr->IsFormDisabled()) {
-    DisForm_InitComboList();
-    DisForm_InitComboEdit();
-    return;
-  }
-
-  auto prop = pdfium::MakeUnique<CFWL_WidgetProperties>();
-  prop->m_pThemeProvider = m_pProperties->m_pThemeProvider;
-  prop->m_dwStyles |= FWL_WGTSTYLE_Border | FWL_WGTSTYLE_VScroll;
-  if (m_pProperties->m_dwStyleExes & FWL_STYLEEXT_CMB_ListItemIconText)
-    prop->m_dwStyleExes |= FWL_STYLEEXT_LTB_Icon;
-  m_pListBox =
-      pdfium::MakeUnique<CFWL_ComboList>(m_pOwnerApp, std::move(prop), this);
-
-  if ((m_pProperties->m_dwStyleExes & FWL_STYLEEXT_CMB_DropDown) && !m_pEdit) {
-    m_pEdit.reset(new CFWL_ComboEdit(
-        m_pOwnerApp, pdfium::MakeUnique<CFWL_WidgetProperties>(), this));
-    m_pEdit->SetOuter(this);
-  }
-  if (m_pEdit)
-    m_pEdit->SetParent(this);
-
-  SetStates(m_pProperties->m_dwStates);
-}
-
-IFWL_ComboBox::~IFWL_ComboBox() {}
-
-FWL_Type IFWL_ComboBox::GetClassID() const {
-  return FWL_Type::ComboBox;
-}
-
-void IFWL_ComboBox::GetWidgetRect(CFX_RectF& rect, bool bAutoSize) {
-  if (!bAutoSize) {
-    rect = m_pProperties->m_rtWidget;
-    return;
-  }
-
-  rect.Reset();
-  if (IsDropDownStyle() && m_pEdit) {
-    m_pEdit->GetWidgetRect(rect, true);
-  } else {
-    rect.width = 100;
-    rect.height = 16;
-  }
-  if (!m_pProperties->m_pThemeProvider)
-    ResetTheme();
-
-  FX_FLOAT* pFWidth = static_cast<FX_FLOAT*>(
-      GetThemeCapacity(CFWL_WidgetCapacity::ScrollBarWidth));
-  if (!pFWidth)
-    return;
-
-  rect.Inflate(0, 0, *pFWidth, 0);
-  IFWL_Widget::GetWidgetRect(rect, true);
-}
-
-void IFWL_ComboBox::AddString(const CFX_WideStringC& wsText) {
-  m_pListBox->AddString(wsText);
-}
-
-bool IFWL_ComboBox::RemoveAt(int32_t iIndex) {
-  return m_pListBox->RemoveAt(iIndex);
-}
-
-void IFWL_ComboBox::RemoveAll() {
-  m_pListBox->DeleteAll();
-}
-
-void IFWL_ComboBox::ModifyStylesEx(uint32_t dwStylesExAdded,
-                                   uint32_t dwStylesExRemoved) {
-  if (m_pWidgetMgr->IsFormDisabled()) {
-    DisForm_ModifyStylesEx(dwStylesExAdded, dwStylesExRemoved);
-    return;
-  }
-
-  bool bAddDropDown = !!(dwStylesExAdded & FWL_STYLEEXT_CMB_DropDown);
-  bool bRemoveDropDown = !!(dwStylesExRemoved & FWL_STYLEEXT_CMB_DropDown);
-  if (bAddDropDown && !m_pEdit) {
-    m_pEdit = pdfium::MakeUnique<CFWL_ComboEdit>(
-        m_pOwnerApp, pdfium::MakeUnique<CFWL_WidgetProperties>(), nullptr);
-    m_pEdit->SetOuter(this);
-    m_pEdit->SetParent(this);
-  } else if (bRemoveDropDown && m_pEdit) {
-    m_pEdit->SetStates(FWL_WGTSTATE_Invisible, true);
-  }
-  IFWL_Widget::ModifyStylesEx(dwStylesExAdded, dwStylesExRemoved);
-}
-
-void IFWL_ComboBox::Update() {
-  if (m_pWidgetMgr->IsFormDisabled()) {
-    DisForm_Update();
-    return;
-  }
-  if (IsLocked())
-    return;
-
-  ResetTheme();
-  if (IsDropDownStyle() && m_pEdit)
-    ResetEditAlignment();
-  if (!m_pProperties->m_pThemeProvider)
-    m_pProperties->m_pThemeProvider = GetAvailableTheme();
-
-  Layout();
-  CFWL_ThemePart part;
-  part.m_pWidget = this;
-  m_fComboFormHandler =
-      *static_cast<FX_FLOAT*>(m_pProperties->m_pThemeProvider->GetCapacity(
-          &part, CFWL_WidgetCapacity::ComboFormHandler));
-}
-
-FWL_WidgetHit IFWL_ComboBox::HitTest(FX_FLOAT fx, FX_FLOAT fy) {
-  if (m_pWidgetMgr->IsFormDisabled())
-    return DisForm_HitTest(fx, fy);
-  return IFWL_Widget::HitTest(fx, fy);
-}
-
-void IFWL_ComboBox::DrawWidget(CFX_Graphics* pGraphics,
-                               const CFX_Matrix* pMatrix) {
-  if (m_pWidgetMgr->IsFormDisabled()) {
-    DisForm_DrawWidget(pGraphics, pMatrix);
-    return;
-  }
-
-  if (!pGraphics)
-    return;
-  if (!m_pProperties->m_pThemeProvider)
-    return;
-
-  IFWL_ThemeProvider* pTheme = m_pProperties->m_pThemeProvider;
-  if (HasBorder())
-    DrawBorder(pGraphics, CFWL_Part::Border, pTheme, pMatrix);
-  if (HasEdge())
-    DrawEdge(pGraphics, CFWL_Part::Edge, pTheme, pMatrix);
-
-  if (!IsDropDownStyle()) {
-    CFX_RectF rtTextBk(m_rtClient);
-    rtTextBk.width -= m_rtBtn.width;
-
-    CFWL_ThemeBackground param;
-    param.m_pWidget = this;
-    param.m_iPart = CFWL_Part::Background;
-    param.m_pGraphics = pGraphics;
-    if (pMatrix)
-      param.m_matrix.Concat(*pMatrix);
-    param.m_rtPart = rtTextBk;
-
-    if (m_iCurSel >= 0) {
-      if (void* p = m_pListBox->GetItemData(
-              m_pListBox.get(),
-              m_pListBox->GetItem(m_pListBox.get(), m_iCurSel))) {
-        param.m_pData = p;
-      }
-    }
-
-    if (m_pProperties->m_dwStates & FWL_WGTSTATE_Disabled) {
-      param.m_dwStates = CFWL_PartState_Disabled;
-    } else if ((m_pProperties->m_dwStates & FWL_WGTSTATE_Focused) &&
-               (m_iCurSel >= 0)) {
-      param.m_dwStates = CFWL_PartState_Selected;
-    } else {
-      param.m_dwStates = CFWL_PartState_Normal;
-    }
-    pTheme->DrawBackground(&param);
-
-    if (m_iCurSel >= 0) {
-      if (!m_pListBox)
-        return;
-
-      CFX_WideString wsText;
-      CFWL_ListItem* hItem = m_pListBox->GetItem(this, m_iCurSel);
-      m_pListBox->GetDataProviderItemText(hItem, wsText);
-
-      CFWL_ThemeText theme_text;
-      theme_text.m_pWidget = this;
-      theme_text.m_iPart = CFWL_Part::Caption;
-      theme_text.m_dwStates = m_iBtnState;
-      theme_text.m_pGraphics = pGraphics;
-      theme_text.m_matrix.Concat(*pMatrix);
-      theme_text.m_rtPart = rtTextBk;
-      theme_text.m_dwStates = (m_pProperties->m_dwStates & FWL_WGTSTATE_Focused)
-                                  ? CFWL_PartState_Selected
-                                  : CFWL_PartState_Normal;
-      theme_text.m_wsText = wsText;
-      theme_text.m_dwTTOStyles = FDE_TTOSTYLE_SingleLine;
-      theme_text.m_iTTOAlign = FDE_TTOALIGNMENT_CenterLeft;
-      pTheme->DrawText(&theme_text);
-    }
-  }
-
-  CFWL_ThemeBackground param;
-  param.m_pWidget = this;
-  param.m_iPart = CFWL_Part::DropDownButton;
-  param.m_dwStates = (m_pProperties->m_dwStates & FWL_WGTSTATE_Disabled)
-                         ? CFWL_PartState_Disabled
-                         : m_iBtnState;
-  param.m_pGraphics = pGraphics;
-  param.m_matrix.Concat(*pMatrix);
-  param.m_rtPart = m_rtBtn;
-  pTheme->DrawBackground(&param);
-}
-
-void IFWL_ComboBox::SetThemeProvider(IFWL_ThemeProvider* pThemeProvider) {
-  if (!pThemeProvider)
-    return;
-
-  m_pProperties->m_pThemeProvider = pThemeProvider;
-  if (m_pListBox)
-    m_pListBox->SetThemeProvider(pThemeProvider);
-  if (m_pEdit)
-    m_pEdit->SetThemeProvider(pThemeProvider);
-}
-
-void IFWL_ComboBox::GetTextByIndex(int32_t iIndex,
-                                   CFX_WideString& wsText) const {
-  CFWL_ListItem* pItem = static_cast<CFWL_ListItem*>(
-      m_pListBox->GetItem(m_pListBox.get(), iIndex));
-  if (pItem)
-    wsText = pItem->m_wsText;
-}
-
-void IFWL_ComboBox::SetCurSel(int32_t iSel) {
-  int32_t iCount = m_pListBox->CountItems(nullptr);
-  bool bClearSel = iSel < 0 || iSel >= iCount;
-  if (IsDropDownStyle() && m_pEdit) {
-    if (bClearSel) {
-      m_pEdit->SetText(CFX_WideString());
-    } else {
-      CFX_WideString wsText;
-      CFWL_ListItem* hItem = m_pListBox->GetItem(this, iSel);
-      m_pListBox->GetDataProviderItemText(hItem, wsText);
-      m_pEdit->SetText(wsText);
-    }
-    m_pEdit->Update();
-  }
-  m_iCurSel = bClearSel ? -1 : iSel;
-}
-
-void IFWL_ComboBox::SetStates(uint32_t dwStates, bool bSet) {
-  if (IsDropDownStyle() && m_pEdit)
-    m_pEdit->SetStates(dwStates, bSet);
-  if (m_pListBox)
-    m_pListBox->SetStates(dwStates, bSet);
-  IFWL_Widget::SetStates(dwStates, bSet);
-}
-
-void IFWL_ComboBox::SetEditText(const CFX_WideString& wsText) {
-  if (!m_pEdit)
-    return;
-
-  m_pEdit->SetText(wsText);
-  m_pEdit->Update();
-}
-
-void IFWL_ComboBox::GetEditText(CFX_WideString& wsText,
-                                int32_t nStart,
-                                int32_t nCount) const {
-  if (m_pEdit) {
-    m_pEdit->GetText(wsText, nStart, nCount);
-    return;
-  }
-  if (!m_pListBox)
-    return;
-
-  CFWL_ListItem* hItem = m_pListBox->GetItem(this, m_iCurSel);
-  m_pListBox->GetDataProviderItemText(hItem, wsText);
-}
-
-void IFWL_ComboBox::OpenDropDownList(bool bActivate) {
-  ShowDropList(bActivate);
-}
-
-void IFWL_ComboBox::GetBBox(CFX_RectF& rect) const {
-  if (m_pWidgetMgr->IsFormDisabled()) {
-    DisForm_GetBBox(rect);
-    return;
-  }
-
-  rect = m_pProperties->m_rtWidget;
-  if (!m_pListBox || !IsDropListVisible())
-    return;
-
-  CFX_RectF rtList;
-  m_pListBox->GetWidgetRect(rtList);
-  rtList.Offset(rect.left, rect.top);
-  rect.Union(rtList);
-}
-
-void IFWL_ComboBox::EditModifyStylesEx(uint32_t dwStylesExAdded,
-                                       uint32_t dwStylesExRemoved) {
-  if (m_pEdit)
-    m_pEdit->ModifyStylesEx(dwStylesExAdded, dwStylesExRemoved);
-}
-
-void IFWL_ComboBox::DrawStretchHandler(CFX_Graphics* pGraphics,
-                                       const CFX_Matrix* pMatrix) {
-  CFWL_ThemeBackground param;
-  param.m_pGraphics = pGraphics;
-  param.m_iPart = CFWL_Part::StretchHandler;
-  param.m_dwStates = CFWL_PartState_Normal;
-  param.m_pWidget = this;
-  if (pMatrix)
-    param.m_matrix.Concat(*pMatrix);
-  param.m_rtPart = m_rtHandler;
-  m_pProperties->m_pThemeProvider->DrawBackground(&param);
-}
-
-void IFWL_ComboBox::ShowDropList(bool bActivate) {
-  if (m_pWidgetMgr->IsFormDisabled())
-    return DisForm_ShowDropList(bActivate);
-  if (IsDropListVisible() == bActivate)
-    return;
-  if (!m_pComboBoxProxy)
-    InitProxyForm();
-
-  m_pComboBoxProxy->Reset();
-  if (!bActivate) {
-    m_pComboBoxProxy->EndDoModal();
-
-    m_bLButtonDown = false;
-    m_pListBox->SetNotifyOwner(true);
-    SetFocus(true);
-    return;
-  }
-
-  m_pListBox->ChangeSelected(m_iCurSel);
-  ResetListItemAlignment();
-
-  uint32_t dwStyleAdd = m_pProperties->m_dwStyleExes &
-                        (FWL_STYLEEXT_CMB_Sort | FWL_STYLEEXT_CMB_OwnerDraw);
-  m_pListBox->ModifyStylesEx(dwStyleAdd, 0);
-  m_pListBox->GetWidgetRect(m_rtList, true);
-
-  CFX_RectF rtAnchor;
-  rtAnchor.Set(0, 0, m_pProperties->m_rtWidget.width,
-               m_pProperties->m_rtWidget.height);
-
-  m_rtList.width = std::max(m_rtList.width, m_rtClient.width);
-  m_rtProxy = m_rtList;
-  if (m_pProperties->m_dwStyleExes & FWL_STYLEEXT_CMB_ListDrag)
-    m_rtProxy.height += m_fComboFormHandler;
-
-  GetPopupPos(0, m_rtProxy.height, rtAnchor, m_rtProxy);
-  if (m_pProperties->m_dwStyleExes & FWL_STYLEEXT_CMB_ListDrag) {
-    FX_FLOAT fx = 0;
-    FX_FLOAT fy = m_rtClient.top + m_rtClient.height / 2;
-    TransformTo(nullptr, fx, fy);
-
-    m_bUpFormHandler = fy > m_rtProxy.top;
-    if (m_bUpFormHandler) {
-      m_rtHandler.Set(0, 0, m_rtList.width, m_fComboFormHandler);
-      m_rtList.top = m_fComboFormHandler;
-    } else {
-      m_rtHandler.Set(0, m_rtList.height, m_rtList.width, m_fComboFormHandler);
-    }
-  }
-  m_pComboBoxProxy->SetWidgetRect(m_rtProxy);
-  m_pComboBoxProxy->Update();
-  m_pListBox->SetWidgetRect(m_rtList);
-  m_pListBox->Update();
-
-  CFWL_EvtPreDropDown ev;
-  ev.m_pSrcTarget = this;
-  DispatchEvent(&ev);
-
-  m_fItemHeight = m_pListBox->GetItemHeight();
-  m_pListBox->SetFocus(true);
-  m_pComboBoxProxy->DoModal();
-  m_pListBox->SetFocus(false);
-}
-
-void IFWL_ComboBox::MatchEditText() {
-  CFX_WideString wsText;
-  m_pEdit->GetText(wsText);
-  int32_t iMatch = m_pListBox->MatchItem(wsText);
-  if (iMatch != m_iCurSel) {
-    m_pListBox->ChangeSelected(iMatch);
-    if (iMatch >= 0)
-      SyncEditText(iMatch);
-  } else if (iMatch >= 0) {
-    m_pEdit->SetSelected();
-  }
-  m_iCurSel = iMatch;
-}
-
-void IFWL_ComboBox::SyncEditText(int32_t iListItem) {
-  CFX_WideString wsText;
-  CFWL_ListItem* hItem = m_pListBox->GetItem(this, iListItem);
-  m_pListBox->GetDataProviderItemText(hItem, wsText);
-  m_pEdit->SetText(wsText);
-  m_pEdit->Update();
-  m_pEdit->SetSelected();
-}
-
-void IFWL_ComboBox::Layout() {
-  if (m_pWidgetMgr->IsFormDisabled())
-    return DisForm_Layout();
-
-  GetClientRect(m_rtClient);
-  FX_FLOAT* pFWidth = static_cast<FX_FLOAT*>(
-      GetThemeCapacity(CFWL_WidgetCapacity::ScrollBarWidth));
-  if (!pFWidth)
-    return;
-
-  FX_FLOAT fBtn = *pFWidth;
-  m_rtBtn.Set(m_rtClient.right() - fBtn, m_rtClient.top, fBtn,
-              m_rtClient.height);
-  if (!IsDropDownStyle() || !m_pEdit)
-    return;
-
-  CFX_RectF rtEdit;
-  rtEdit.Set(m_rtClient.left, m_rtClient.top, m_rtClient.width - fBtn,
-             m_rtClient.height);
-  m_pEdit->SetWidgetRect(rtEdit);
-
-  if (m_iCurSel >= 0) {
-    CFX_WideString wsText;
-    CFWL_ListItem* hItem = m_pListBox->GetItem(this, m_iCurSel);
-    m_pListBox->GetDataProviderItemText(hItem, wsText);
-    m_pEdit->LockUpdate();
-    m_pEdit->SetText(wsText);
-    m_pEdit->UnlockUpdate();
-  }
-  m_pEdit->Update();
-}
-
-void IFWL_ComboBox::ResetTheme() {
-  IFWL_ThemeProvider* pTheme = m_pProperties->m_pThemeProvider;
-  if (!pTheme) {
-    pTheme = GetAvailableTheme();
-    m_pProperties->m_pThemeProvider = pTheme;
-  }
-  if (m_pListBox && !m_pListBox->GetThemeProvider())
-    m_pListBox->SetThemeProvider(pTheme);
-  if (m_pEdit && !m_pEdit->GetThemeProvider())
-    m_pEdit->SetThemeProvider(pTheme);
-}
-
-void IFWL_ComboBox::ResetEditAlignment() {
-  if (!m_pEdit)
-    return;
-
-  uint32_t dwAdd = 0;
-  switch (m_pProperties->m_dwStyleExes & FWL_STYLEEXT_CMB_EditHAlignMask) {
-    case FWL_STYLEEXT_CMB_EditHCenter: {
-      dwAdd |= FWL_STYLEEXT_EDT_HCenter;
-      break;
-    }
-    case FWL_STYLEEXT_CMB_EditHFar: {
-      dwAdd |= FWL_STYLEEXT_EDT_HFar;
-      break;
-    }
-    default: { dwAdd |= FWL_STYLEEXT_EDT_HNear; }
-  }
-  switch (m_pProperties->m_dwStyleExes & FWL_STYLEEXT_CMB_EditVAlignMask) {
-    case FWL_STYLEEXT_CMB_EditVCenter: {
-      dwAdd |= FWL_STYLEEXT_EDT_VCenter;
-      break;
-    }
-    case FWL_STYLEEXT_CMB_EditVFar: {
-      dwAdd |= FWL_STYLEEXT_EDT_VFar;
-      break;
-    }
-    default: {
-      dwAdd |= FWL_STYLEEXT_EDT_VNear;
-      break;
-    }
-  }
-  if (m_pProperties->m_dwStyleExes & FWL_STYLEEXT_CMB_EditJustified)
-    dwAdd |= FWL_STYLEEXT_EDT_Justified;
-  if (m_pProperties->m_dwStyleExes & FWL_STYLEEXT_CMB_EditDistributed)
-    dwAdd |= FWL_STYLEEXT_EDT_Distributed;
-
-  m_pEdit->ModifyStylesEx(dwAdd, FWL_STYLEEXT_EDT_HAlignMask |
-                                     FWL_STYLEEXT_EDT_HAlignModeMask |
-                                     FWL_STYLEEXT_EDT_VAlignMask);
-}
-
-void IFWL_ComboBox::ResetListItemAlignment() {
-  if (!m_pListBox)
-    return;
-
-  uint32_t dwAdd = 0;
-  switch (m_pProperties->m_dwStyleExes & FWL_STYLEEXT_CMB_ListItemAlignMask) {
-    case FWL_STYLEEXT_CMB_ListItemCenterAlign: {
-      dwAdd |= FWL_STYLEEXT_LTB_CenterAlign;
-      break;
-    }
-    case FWL_STYLEEXT_CMB_ListItemRightAlign: {
-      dwAdd |= FWL_STYLEEXT_LTB_RightAlign;
-      break;
-    }
-    default: {
-      dwAdd |= FWL_STYLEEXT_LTB_LeftAlign;
-      break;
-    }
-  }
-  m_pListBox->ModifyStylesEx(dwAdd, FWL_STYLEEXT_CMB_ListItemAlignMask);
-}
-
-void IFWL_ComboBox::ProcessSelChanged(bool bLButtonUp) {
-  m_iCurSel = m_pListBox->GetItemIndex(this, m_pListBox->GetSelItem(0));
-  if (!IsDropDownStyle()) {
-    Repaint(&m_rtClient);
-    return;
-  }
-
-  CFWL_ListItem* hItem = m_pListBox->GetItem(this, m_iCurSel);
-  if (!hItem)
-    return;
-
-  CFX_WideString wsText;
-  m_pListBox->GetItemText(this, hItem, wsText);
-  if (m_pEdit) {
-    m_pEdit->SetText(wsText);
-    m_pEdit->Update();
-    m_pEdit->SetSelected();
-  }
-
-  CFWL_EvtSelectChanged ev;
-  ev.bLButtonUp = bLButtonUp;
-  ev.m_pSrcTarget = this;
-  DispatchEvent(&ev);
-}
-
-void IFWL_ComboBox::InitProxyForm() {
-  if (m_pComboBoxProxy)
-    return;
-  if (!m_pListBox)
-    return;
-
-  auto prop = pdfium::MakeUnique<CFWL_WidgetProperties>();
-  prop->m_pOwner = this;
-  prop->m_dwStyles = FWL_WGTSTYLE_Popup;
-  prop->m_dwStates = FWL_WGTSTATE_Invisible;
-
-  // TODO(dsinclair): Does this leak? I don't see a delete, but I'm not sure
-  // if the SetParent call is going to transfer ownership.
-  m_pComboBoxProxy = new CFWL_ComboBoxProxy(this, m_pOwnerApp, std::move(prop),
-                                            m_pListBox.get());
-  m_pListBox->SetParent(m_pComboBoxProxy);
-}
-
-void IFWL_ComboBox::DisForm_InitComboList() {
-  if (m_pListBox)
-    return;
-
-  auto prop = pdfium::MakeUnique<CFWL_WidgetProperties>();
-  prop->m_pParent = this;
-  prop->m_dwStyles = FWL_WGTSTYLE_Border | FWL_WGTSTYLE_VScroll;
-  prop->m_dwStates = FWL_WGTSTATE_Invisible;
-  prop->m_pThemeProvider = m_pProperties->m_pThemeProvider;
-  m_pListBox =
-      pdfium::MakeUnique<CFWL_ComboList>(m_pOwnerApp, std::move(prop), this);
-}
-
-void IFWL_ComboBox::DisForm_InitComboEdit() {
-  if (m_pEdit)
-    return;
-
-  auto prop = pdfium::MakeUnique<CFWL_WidgetProperties>();
-  prop->m_pParent = this;
-  prop->m_pThemeProvider = m_pProperties->m_pThemeProvider;
-
-  m_pEdit =
-      pdfium::MakeUnique<CFWL_ComboEdit>(m_pOwnerApp, std::move(prop), this);
-  m_pEdit->SetOuter(this);
-}
-
-void IFWL_ComboBox::DisForm_ShowDropList(bool bActivate) {
-  if (DisForm_IsDropListVisible() == bActivate)
-    return;
-
-  if (bActivate) {
-    CFWL_EvtPreDropDown preEvent;
-    preEvent.m_pSrcTarget = this;
-    DispatchEvent(&preEvent);
-
-    CFWL_ComboList* pComboList = m_pListBox.get();
-    int32_t iItems = pComboList->CountItems(nullptr);
-    if (iItems < 1)
-      return;
-
-    ResetListItemAlignment();
-    pComboList->ChangeSelected(m_iCurSel);
-
-    FX_FLOAT fItemHeight = pComboList->CalcItemHeight();
-    FX_FLOAT fBorder = GetBorderSize();
-    FX_FLOAT fPopupMin = 0.0f;
-    if (iItems > 3)
-      fPopupMin = fItemHeight * 3 + fBorder * 2;
-
-    FX_FLOAT fPopupMax = fItemHeight * iItems + fBorder * 2;
-    CFX_RectF rtList;
-    rtList.left = m_rtClient.left;
-    rtList.width = m_pProperties->m_rtWidget.width;
-    rtList.top = 0;
-    rtList.height = 0;
-    GetPopupPos(fPopupMin, fPopupMax, m_pProperties->m_rtWidget, rtList);
-
-    m_pListBox->SetWidgetRect(rtList);
-    m_pListBox->Update();
-  } else {
-    SetFocus(true);
-  }
-
-  m_pListBox->SetStates(FWL_WGTSTATE_Invisible, !bActivate);
-  if (bActivate) {
-    CFWL_EvtPostDropDown postEvent;
-    postEvent.m_pSrcTarget = this;
-    DispatchEvent(&postEvent);
-  }
-
-  CFX_RectF rect;
-  m_pListBox->GetWidgetRect(rect);
-  rect.Inflate(2, 2);
-  Repaint(&rect);
-}
-
-void IFWL_ComboBox::DisForm_ModifyStylesEx(uint32_t dwStylesExAdded,
-                                           uint32_t dwStylesExRemoved) {
-  if (!m_pEdit)
-    DisForm_InitComboEdit();
-
-  bool bAddDropDown = !!(dwStylesExAdded & FWL_STYLEEXT_CMB_DropDown);
-  bool bDelDropDown = !!(dwStylesExRemoved & FWL_STYLEEXT_CMB_DropDown);
-
-  dwStylesExRemoved &= ~FWL_STYLEEXT_CMB_DropDown;
-  m_pProperties->m_dwStyleExes |= FWL_STYLEEXT_CMB_DropDown;
-
-  if (bAddDropDown)
-    m_pEdit->ModifyStylesEx(0, FWL_STYLEEXT_EDT_ReadOnly);
-  else if (bDelDropDown)
-    m_pEdit->ModifyStylesEx(FWL_STYLEEXT_EDT_ReadOnly, 0);
-  IFWL_Widget::ModifyStylesEx(dwStylesExAdded, dwStylesExRemoved);
-}
-
-void IFWL_ComboBox::DisForm_Update() {
-  if (m_iLock)
-    return;
-  if (m_pEdit)
-    ResetEditAlignment();
-  ResetTheme();
-  Layout();
-}
-
-FWL_WidgetHit IFWL_ComboBox::DisForm_HitTest(FX_FLOAT fx, FX_FLOAT fy) {
-  CFX_RectF rect;
-  rect.Set(0, 0, m_pProperties->m_rtWidget.width - m_rtBtn.width,
-           m_pProperties->m_rtWidget.height);
-  if (rect.Contains(fx, fy))
-    return FWL_WidgetHit::Edit;
-  if (m_rtBtn.Contains(fx, fy))
-    return FWL_WidgetHit::Client;
-  if (DisForm_IsDropListVisible()) {
-    m_pListBox->GetWidgetRect(rect);
-    if (rect.Contains(fx, fy))
-      return FWL_WidgetHit::Client;
-  }
-  return FWL_WidgetHit::Unknown;
-}
-
-void IFWL_ComboBox::DisForm_DrawWidget(CFX_Graphics* pGraphics,
-                                       const CFX_Matrix* pMatrix) {
-  IFWL_ThemeProvider* pTheme = m_pProperties->m_pThemeProvider;
-  CFX_Matrix mtOrg;
-  mtOrg.Set(1, 0, 0, 1, 0, 0);
-  if (pMatrix)
-    mtOrg = *pMatrix;
-
-  pGraphics->SaveGraphState();
-  pGraphics->ConcatMatrix(&mtOrg);
-  if (!m_rtBtn.IsEmpty(0.1f)) {
-    CFWL_ThemeBackground param;
-    param.m_pWidget = this;
-    param.m_iPart = CFWL_Part::DropDownButton;
-    param.m_dwStates = m_iBtnState;
-    param.m_pGraphics = pGraphics;
-    param.m_rtPart = m_rtBtn;
-    pTheme->DrawBackground(&param);
-  }
-  pGraphics->RestoreGraphState();
-
-  if (m_pEdit) {
-    CFX_RectF rtEdit;
-    m_pEdit->GetWidgetRect(rtEdit);
-    CFX_Matrix mt;
-    mt.Set(1, 0, 0, 1, rtEdit.left, rtEdit.top);
-    mt.Concat(mtOrg);
-    m_pEdit->DrawWidget(pGraphics, &mt);
-  }
-  if (m_pListBox && DisForm_IsDropListVisible()) {
-    CFX_RectF rtList;
-    m_pListBox->GetWidgetRect(rtList);
-    CFX_Matrix mt;
-    mt.Set(1, 0, 0, 1, rtList.left, rtList.top);
-    mt.Concat(mtOrg);
-    m_pListBox->DrawWidget(pGraphics, &mt);
-  }
-}
-
-void IFWL_ComboBox::DisForm_GetBBox(CFX_RectF& rect) const {
-  rect = m_pProperties->m_rtWidget;
-  if (!m_pListBox || !DisForm_IsDropListVisible())
-    return;
-
-  CFX_RectF rtList;
-  m_pListBox->GetWidgetRect(rtList);
-  rtList.Offset(rect.left, rect.top);
-  rect.Union(rtList);
-}
-
-void IFWL_ComboBox::DisForm_Layout() {
-  GetClientRect(m_rtClient);
-  m_rtContent = m_rtClient;
-  FX_FLOAT* pFWidth = static_cast<FX_FLOAT*>(
-      GetThemeCapacity(CFWL_WidgetCapacity::ScrollBarWidth));
-  if (!pFWidth)
-    return;
-
-  FX_FLOAT borderWidth = 1;
-  FX_FLOAT fBtn = *pFWidth;
-  if (!(GetStylesEx() & FWL_STYLEEXT_CMB_ReadOnly)) {
-    m_rtBtn.Set(m_rtClient.right() - fBtn, m_rtClient.top + borderWidth,
-                fBtn - borderWidth, m_rtClient.height - 2 * borderWidth);
-  }
-
-  CFX_RectF* pUIMargin =
-      static_cast<CFX_RectF*>(GetThemeCapacity(CFWL_WidgetCapacity::UIMargin));
-  if (pUIMargin) {
-    m_rtContent.Deflate(pUIMargin->left, pUIMargin->top, pUIMargin->width,
-                        pUIMargin->height);
-  }
-
-  if (!IsDropDownStyle() || !m_pEdit)
-    return;
-
-  CFX_RectF rtEdit;
-  rtEdit.Set(m_rtContent.left, m_rtContent.top, m_rtContent.width - fBtn,
-             m_rtContent.height);
-  m_pEdit->SetWidgetRect(rtEdit);
-
-  if (m_iCurSel >= 0) {
-    CFX_WideString wsText;
-    CFWL_ListItem* hItem = m_pListBox->GetItem(this, m_iCurSel);
-    m_pListBox->GetDataProviderItemText(hItem, wsText);
-    m_pEdit->LockUpdate();
-    m_pEdit->SetText(wsText);
-    m_pEdit->UnlockUpdate();
-  }
-  m_pEdit->Update();
-}
-
-void IFWL_ComboBox::OnProcessMessage(CFWL_Message* pMessage) {
-  if (m_pWidgetMgr->IsFormDisabled()) {
-    DisForm_OnProcessMessage(pMessage);
-    return;
-  }
-  if (!pMessage)
-    return;
-
-  switch (pMessage->GetClassID()) {
-    case CFWL_MessageType::SetFocus:
-      OnFocusChanged(pMessage, true);
-      break;
-    case CFWL_MessageType::KillFocus:
-      OnFocusChanged(pMessage, false);
-      break;
-    case CFWL_MessageType::Mouse: {
-      CFWL_MsgMouse* pMsg = static_cast<CFWL_MsgMouse*>(pMessage);
-      switch (pMsg->m_dwCmd) {
-        case FWL_MouseCommand::LeftButtonDown:
-          OnLButtonDown(pMsg);
-          break;
-        case FWL_MouseCommand::LeftButtonUp:
-          OnLButtonUp(pMsg);
-          break;
-        case FWL_MouseCommand::Move:
-          OnMouseMove(pMsg);
-          break;
-        case FWL_MouseCommand::Leave:
-          OnMouseLeave(pMsg);
-          break;
-        default:
-          break;
-      }
-      break;
-    }
-    case CFWL_MessageType::Key:
-      OnKey(static_cast<CFWL_MsgKey*>(pMessage));
-      break;
-    default:
-      break;
-  }
-
-  IFWL_Widget::OnProcessMessage(pMessage);
-}
-
-void IFWL_ComboBox::OnProcessEvent(CFWL_Event* pEvent) {
-  CFWL_EventType dwFlag = pEvent->GetClassID();
-  if (dwFlag == CFWL_EventType::Scroll) {
-    CFWL_EvtScroll* pScrollEvent = static_cast<CFWL_EvtScroll*>(pEvent);
-    CFWL_EvtScroll pScrollEv;
-    pScrollEv.m_pSrcTarget = this;
-    pScrollEv.m_iScrollCode = pScrollEvent->m_iScrollCode;
-    pScrollEv.m_fPos = pScrollEvent->m_fPos;
-    DispatchEvent(&pScrollEv);
-  } else if (dwFlag == CFWL_EventType::TextChanged) {
-    CFWL_EvtEditChanged pTemp;
-    pTemp.m_pSrcTarget = this;
-    DispatchEvent(&pTemp);
-  }
-}
-
-void IFWL_ComboBox::OnDrawWidget(CFX_Graphics* pGraphics,
-                                 const CFX_Matrix* pMatrix) {
-  DrawWidget(pGraphics, pMatrix);
-}
-
-void IFWL_ComboBox::OnFocusChanged(CFWL_Message* pMsg, bool bSet) {
-  if (bSet) {
-    m_pProperties->m_dwStates |= FWL_WGTSTATE_Focused;
-    if (IsDropDownStyle() && pMsg->m_pSrcTarget != m_pListBox.get()) {
-      if (!m_pEdit)
-        return;
-      m_pEdit->SetSelected();
-      return;
-    }
-
-    Repaint(&m_rtClient);
-    return;
-  }
-
-  m_pProperties->m_dwStates &= ~FWL_WGTSTATE_Focused;
-  if (!IsDropDownStyle() || pMsg->m_pDstTarget == m_pListBox.get()) {
-    Repaint(&m_rtClient);
-    return;
-  }
-  if (!m_pEdit)
-    return;
-
-  m_pEdit->FlagFocus(false);
-  m_pEdit->ClearSelected();
-}
-
-void IFWL_ComboBox::OnLButtonDown(CFWL_MsgMouse* pMsg) {
-  if (m_pProperties->m_dwStates & FWL_WGTSTATE_Disabled)
-    return;
-
-  CFX_RectF& rtBtn = IsDropDownStyle() ? m_rtBtn : m_rtClient;
-  if (!rtBtn.Contains(pMsg->m_fx, pMsg->m_fy))
-    return;
-
-  if (IsDropDownStyle() && m_pEdit)
-    MatchEditText();
-
-  m_bLButtonDown = true;
-  m_iBtnState = CFWL_PartState_Pressed;
-  Repaint(&m_rtClient);
-
-  ShowDropList(true);
-  m_iBtnState = CFWL_PartState_Normal;
-  Repaint(&m_rtClient);
-}
-
-void IFWL_ComboBox::OnLButtonUp(CFWL_MsgMouse* pMsg) {
-  m_bLButtonDown = false;
-  if (m_rtBtn.Contains(pMsg->m_fx, pMsg->m_fy))
-    m_iBtnState = CFWL_PartState_Hovered;
-  else
-    m_iBtnState = CFWL_PartState_Normal;
-
-  Repaint(&m_rtBtn);
-}
-
-void IFWL_ComboBox::OnMouseMove(CFWL_MsgMouse* pMsg) {
-  int32_t iOldState = m_iBtnState;
-  if (m_rtBtn.Contains(pMsg->m_fx, pMsg->m_fy)) {
-    m_iBtnState =
-        m_bLButtonDown ? CFWL_PartState_Pressed : CFWL_PartState_Hovered;
-  } else {
-    m_iBtnState = CFWL_PartState_Normal;
-  }
-  if ((iOldState != m_iBtnState) &&
-      !((m_pProperties->m_dwStates & FWL_WGTSTATE_Disabled) ==
-        FWL_WGTSTATE_Disabled)) {
-    Repaint(&m_rtBtn);
-  }
-}
-
-void IFWL_ComboBox::OnMouseLeave(CFWL_MsgMouse* pMsg) {
-  if (!IsDropListVisible() &&
-      !((m_pProperties->m_dwStates & FWL_WGTSTATE_Disabled) ==
-        FWL_WGTSTATE_Disabled)) {
-    m_iBtnState = CFWL_PartState_Normal;
-    Repaint(&m_rtBtn);
-  }
-}
-
-void IFWL_ComboBox::OnKey(CFWL_MsgKey* pMsg) {
-  uint32_t dwKeyCode = pMsg->m_dwKeyCode;
-  if (dwKeyCode == FWL_VKEY_Tab) {
-    DispatchKeyEvent(pMsg);
-    return;
-  }
-  if (pMsg->m_pDstTarget == this)
-    DoSubCtrlKey(pMsg);
-}
-
-void IFWL_ComboBox::DoSubCtrlKey(CFWL_MsgKey* pMsg) {
-  uint32_t dwKeyCode = pMsg->m_dwKeyCode;
-  const bool bUp = dwKeyCode == FWL_VKEY_Up;
-  const bool bDown = dwKeyCode == FWL_VKEY_Down;
-  if (bUp || bDown) {
-    int32_t iCount = m_pListBox->CountItems(nullptr);
-    if (iCount < 1)
-      return;
-
-    bool bMatchEqual = false;
-    int32_t iCurSel = m_iCurSel;
-    bool bDropDown = IsDropDownStyle();
-    if (bDropDown && m_pEdit) {
-      CFX_WideString wsText;
-      m_pEdit->GetText(wsText);
-      iCurSel = m_pListBox->MatchItem(wsText);
-      if (iCurSel >= 0) {
-        CFX_WideString wsTemp;
-        CFWL_ListItem* hItem = m_pListBox->GetItem(this, iCurSel);
-        m_pListBox->GetDataProviderItemText(hItem, wsTemp);
-        bMatchEqual = wsText == wsTemp;
-      }
-    }
-    if (iCurSel < 0) {
-      iCurSel = 0;
-    } else if (!bDropDown || bMatchEqual) {
-      if ((bUp && iCurSel == 0) || (bDown && iCurSel == iCount - 1))
-        return;
-      if (bUp)
-        iCurSel--;
-      else
-        iCurSel++;
-    }
-    m_iCurSel = iCurSel;
-    if (bDropDown && m_pEdit)
-      SyncEditText(m_iCurSel);
-    else
-      Repaint(&m_rtClient);
-    return;
-  }
-
-  if (IsDropDownStyle())
-    m_pEdit->GetDelegate()->OnProcessMessage(pMsg);
-}
-
-void IFWL_ComboBox::DisForm_OnProcessMessage(CFWL_Message* pMessage) {
-  if (!pMessage)
-    return;
-
-  bool backDefault = true;
-  switch (pMessage->GetClassID()) {
-    case CFWL_MessageType::SetFocus: {
-      backDefault = false;
-      DisForm_OnFocusChanged(pMessage, true);
-      break;
-    }
-    case CFWL_MessageType::KillFocus: {
-      backDefault = false;
-      DisForm_OnFocusChanged(pMessage, false);
-      break;
-    }
-    case CFWL_MessageType::Mouse: {
-      backDefault = false;
-      CFWL_MsgMouse* pMsg = static_cast<CFWL_MsgMouse*>(pMessage);
-      switch (pMsg->m_dwCmd) {
-        case FWL_MouseCommand::LeftButtonDown:
-          DisForm_OnLButtonDown(pMsg);
-          break;
-        case FWL_MouseCommand::LeftButtonUp:
-          OnLButtonUp(pMsg);
-          break;
-        default:
-          break;
-      }
-      break;
-    }
-    case CFWL_MessageType::Key: {
-      backDefault = false;
-      CFWL_MsgKey* pKey = static_cast<CFWL_MsgKey*>(pMessage);
-      if (pKey->m_dwCmd == FWL_KeyCommand::KeyUp)
-        break;
-      if (DisForm_IsDropListVisible() &&
-          pKey->m_dwCmd == FWL_KeyCommand::KeyDown) {
-        bool bListKey = pKey->m_dwKeyCode == FWL_VKEY_Up ||
-                        pKey->m_dwKeyCode == FWL_VKEY_Down ||
-                        pKey->m_dwKeyCode == FWL_VKEY_Return ||
-                        pKey->m_dwKeyCode == FWL_VKEY_Escape;
-        if (bListKey) {
-          m_pListBox->GetDelegate()->OnProcessMessage(pMessage);
-          break;
-        }
-      }
-      DisForm_OnKey(pKey);
-      break;
-    }
-    default:
-      break;
-  }
-  if (backDefault)
-    IFWL_Widget::OnProcessMessage(pMessage);
-}
-
-void IFWL_ComboBox::DisForm_OnLButtonDown(CFWL_MsgMouse* pMsg) {
-  bool bDropDown = DisForm_IsDropListVisible();
-  CFX_RectF& rtBtn = bDropDown ? m_rtBtn : m_rtClient;
-  if (!rtBtn.Contains(pMsg->m_fx, pMsg->m_fy))
-    return;
-
-  if (DisForm_IsDropListVisible()) {
-    DisForm_ShowDropList(false);
-    return;
-  }
-  if (m_pEdit)
-    MatchEditText();
-  DisForm_ShowDropList(true);
-}
-
-void IFWL_ComboBox::DisForm_OnFocusChanged(CFWL_Message* pMsg, bool bSet) {
-  if (bSet) {
-    m_pProperties->m_dwStates |= FWL_WGTSTATE_Focused;
-    if ((m_pEdit->GetStates() & FWL_WGTSTATE_Focused) == 0) {
-      CFWL_MsgSetFocus msg;
-      msg.m_pDstTarget = m_pEdit.get();
-      msg.m_pSrcTarget = nullptr;
-      m_pEdit->GetDelegate()->OnProcessMessage(&msg);
-    }
-  } else {
-    m_pProperties->m_dwStates &= ~FWL_WGTSTATE_Focused;
-    DisForm_ShowDropList(false);
-    CFWL_MsgKillFocus msg;
-    msg.m_pDstTarget = nullptr;
-    msg.m_pSrcTarget = m_pEdit.get();
-    m_pEdit->GetDelegate()->OnProcessMessage(&msg);
-  }
-}
-
-void IFWL_ComboBox::DisForm_OnKey(CFWL_MsgKey* pMsg) {
-  uint32_t dwKeyCode = pMsg->m_dwKeyCode;
-  const bool bUp = dwKeyCode == FWL_VKEY_Up;
-  const bool bDown = dwKeyCode == FWL_VKEY_Down;
-  if (bUp || bDown) {
-    CFWL_ComboList* pComboList = m_pListBox.get();
-    int32_t iCount = pComboList->CountItems(nullptr);
-    if (iCount < 1)
-      return;
-
-    bool bMatchEqual = false;
-    int32_t iCurSel = m_iCurSel;
-    if (m_pEdit) {
-      CFX_WideString wsText;
-      m_pEdit->GetText(wsText);
-      iCurSel = pComboList->MatchItem(wsText);
-      if (iCurSel >= 0) {
-        CFX_WideString wsTemp;
-        CFWL_ListItem* item = m_pListBox->GetSelItem(iCurSel);
-        m_pListBox->GetDataProviderItemText(item, wsTemp);
-        bMatchEqual = wsText == wsTemp;
-      }
-    }
-    if (iCurSel < 0) {
-      iCurSel = 0;
-    } else if (bMatchEqual) {
-      if ((bUp && iCurSel == 0) || (bDown && iCurSel == iCount - 1))
-        return;
-      if (bUp)
-        iCurSel--;
-      else
-        iCurSel++;
-    }
-    m_iCurSel = iCurSel;
-    SyncEditText(m_iCurSel);
-    return;
-  }
-  if (m_pEdit)
-    m_pEdit->GetDelegate()->OnProcessMessage(pMsg);
-}