Fold IFWL*::{Initialize|Finalize} into constructor/destructor

xfa/fwl/core/ifwl_listbox.cpp

 // 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_listbox.h"
 
+#include "third_party/base/ptr_util.h"
 #include "xfa/fde/tto/fde_textout.h"
 #include "xfa/fwl/core/cfwl_message.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/ifwl_app.h"
 #include "xfa/fwl/core/ifwl_themeprovider.h"
 
 namespace {
 
 const int kItemTextMargin = 2;
 
 }  // namespace
 
 IFWL_ListBox::IFWL_ListBox(const IFWL_App* app,
                            const CFWL_WidgetImpProperties& properties,
                            IFWL_Widget* pOuter)
     : IFWL_Widget(app, properties, pOuter),
       m_dwTTOStyles(0),
       m_iTTOAligns(0),
       m_hAnchor(nullptr),
       m_fScorllBarWidth(0),
       m_bLButtonDown(FALSE),
       m_pScrollBarTP(nullptr) {
   m_rtClient.Reset();
   m_rtConent.Reset();
   m_rtStatic.Reset();
+
+  SetDelegate(pdfium::MakeUnique<CFWL_ListBoxImpDelegate>(this));
 }
 
 IFWL_ListBox::~IFWL_ListBox() {}
 
-void IFWL_ListBox::Initialize() {
-  IFWL_Widget::Initialize();
-  m_pDelegate = new CFWL_ListBoxImpDelegate(this);
-}
-
-void IFWL_ListBox::Finalize() {
-  if (m_pVertScrollBar)
-    m_pVertScrollBar->Finalize();
-  if (m_pHorzScrollBar)
-    m_pHorzScrollBar->Finalize();
-
-  delete m_pDelegate;
-  m_pDelegate = nullptr;
-  IFWL_Widget::Finalize();
-}
-
 FWL_Type IFWL_ListBox::GetClassID() const {
   return FWL_Type::ListBox;
 }
 
 FWL_Error IFWL_ListBox::GetWidgetRect(CFX_RectF& rect, FX_BOOL bAutoSize) {
   if (bAutoSize) {
     rect.Set(0, 0, 0, 0);
     if (!m_pProperties->m_pThemeProvider) {
       m_pProperties->m_pThemeProvider = GetAvailableTheme();
     }
@@ skipping 823 matching lines @@
 
 void IFWL_ListBox::InitScrollBar(FX_BOOL bVert) {
   if ((bVert && m_pVertScrollBar) || (!bVert && m_pHorzScrollBar)) {
     return;
   }
   CFWL_WidgetImpProperties prop;
   prop.m_dwStyleExes = bVert ? FWL_STYLEEXT_SCB_Vert : FWL_STYLEEXT_SCB_Horz;
   prop.m_dwStates = FWL_WGTSTATE_Invisible;
   prop.m_pParent = this;
   prop.m_pThemeProvider = m_pScrollBarTP;
-  IFWL_ScrollBar* pScrollBar = new IFWL_ScrollBar(m_pOwnerApp, prop, this);
-  pScrollBar->Initialize();
-  (bVert ? &m_pVertScrollBar : &m_pHorzScrollBar)->reset(pScrollBar);
+  (bVert ? &m_pVertScrollBar : &m_pHorzScrollBar)
+      ->reset(new IFWL_ScrollBar(m_pOwnerApp, prop, this));
 }
 
 FX_BOOL IFWL_ListBox::IsShowScrollBar(FX_BOOL bVert) {
   IFWL_ScrollBar* pScrollbar =
       bVert ? m_pVertScrollBar.get() : m_pHorzScrollBar.get();
   if (!pScrollbar || (pScrollbar->GetStates() & FWL_WGTSTATE_Invisible)) {
     return FALSE;
   }
   return !(m_pProperties->m_dwStyleExes &
            FWL_STYLEEXT_LTB_ShowScrollBarFocus) ||
@@ skipping 277 matching lines @@
     m_pOwner->Repaint(&m_pOwner->m_rtClient);
   }
   return TRUE;
 }
 
 void CFWL_ListBoxImpDelegate::DispatchSelChangedEv() {
   CFWL_EvtLtbSelChanged ev;
   ev.m_pSrcTarget = m_pOwner;
   m_pOwner->DispatchEvent(&ev);
 }