Replace |CPWL_ComboBox::operator CPWL_Edit()| with explicit method.

fpdfsdk/src/formfiller/FFL_ComboBox.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 "fpdfsdk/include/formfiller/FFL_CBA_Fontmap.h"
 #include "fpdfsdk/include/formfiller/FFL_ComboBox.h"
 #include "fpdfsdk/include/formfiller/FFL_FormFiller.h"
 #include "fpdfsdk/include/formfiller/FFL_IFormFiller.h"
@@ skipping 119 matching lines @@
     m_pWidget->GetPDFPage();
   }
 }
 
 void CFFL_ComboBox::GetActionData(CPDFSDK_PageView* pPageView,
                                   CPDF_AAction::AActionType type,
                                   PDFSDK_FieldAction& fa) {
   switch (type) {
     case CPDF_AAction::KeyStroke:
       if (CPWL_ComboBox* pComboBox =
-              (CPWL_ComboBox*)GetPDFWindow(pPageView, FALSE)) {
-        if (CPWL_Edit* pEdit = (CPWL_Edit*)*pComboBox) {
+              static_cast<CPWL_ComboBox*>(GetPDFWindow(pPageView, FALSE))) {
+        if (CPWL_Edit* pEdit = pComboBox->GetEdit()) {
           fa.bFieldFull = pEdit->IsTextFull();
           int nSelStart = 0;
           int nSelEnd = 0;
           pEdit->GetSel(nSelStart, nSelEnd);
           fa.nSelEnd = nSelEnd;
           fa.nSelStart = nSelStart;
           fa.sValue = pEdit->GetText();
           fa.sChangeEx = GetSelectExportText();
 
           if (fa.bFieldFull) {
             fa.sChange = L"";
             fa.sChangeEx = L"";
           }
         }
       }
       break;
     case CPDF_AAction::Validate:
       if (CPWL_ComboBox* pComboBox =
-              (CPWL_ComboBox*)GetPDFWindow(pPageView, FALSE)) {
-        if (CPWL_Edit* pEdit = (CPWL_Edit*)*pComboBox) {
+              static_cast<CPWL_ComboBox*>(GetPDFWindow(pPageView, FALSE))) {
+        if (CPWL_Edit* pEdit = pComboBox->GetEdit()) {
           fa.sValue = pEdit->GetText();
         }
       }
       break;
     case CPDF_AAction::LoseFocus:
     case CPDF_AAction::GetFocus:
       ASSERT(m_pWidget != NULL);
       fa.sValue = m_pWidget->GetValue();
       break;
     default:
       break;
   }
 }
 
 void CFFL_ComboBox::SetActionData(CPDFSDK_PageView* pPageView,
                                   CPDF_AAction::AActionType type,
                                   const PDFSDK_FieldAction& fa) {
   switch (type) {
     case CPDF_AAction::KeyStroke:
       if (CPWL_ComboBox* pComboBox =
-              (CPWL_ComboBox*)GetPDFWindow(pPageView, FALSE)) {
-        if (CPWL_Edit* pEdit = (CPWL_Edit*)*pComboBox) {
+              static_cast<CPWL_ComboBox*>(GetPDFWindow(pPageView, FALSE))) {
+        if (CPWL_Edit* pEdit = pComboBox->GetEdit()) {
           pEdit->SetSel(fa.nSelStart, fa.nSelEnd);
           pEdit->ReplaceSel(fa.sChange.c_str());
         }
       }
       break;
     default:
       break;
   }
 }
 
 FX_BOOL CFFL_ComboBox::IsActionDataChanged(CPDF_AAction::AActionType type,
                                            const PDFSDK_FieldAction& faOld,
                                            const PDFSDK_FieldAction& faNew) {
   switch (type) {
     case CPDF_AAction::KeyStroke:
       return (!faOld.bFieldFull && faOld.nSelEnd != faNew.nSelEnd) ||
              faOld.nSelStart != faNew.nSelStart ||
              faOld.sChange != faNew.sChange;
     default:
       break;
   }
 
   return FALSE;
 }
 
 void CFFL_ComboBox::SaveState(CPDFSDK_PageView* pPageView) {
   ASSERT(pPageView != NULL);
 
   if (CPWL_ComboBox* pComboBox =
-          (CPWL_ComboBox*)GetPDFWindow(pPageView, FALSE)) {
+          static_cast<CPWL_ComboBox*>(GetPDFWindow(pPageView, FALSE))) {
     m_State.nIndex = pComboBox->GetSelect();
 
-    if (CPWL_Edit* pEdit = (CPWL_Edit*)*pComboBox) {
+    if (CPWL_Edit* pEdit = pComboBox->GetEdit()) {
       pEdit->GetSel(m_State.nStart, m_State.nEnd);
       m_State.sValue = pEdit->GetText();
     }
   }
 }
 
 void CFFL_ComboBox::RestoreState(CPDFSDK_PageView* pPageView) {
   ASSERT(pPageView != NULL);
 
   if (CPWL_ComboBox* pComboBox =
-          (CPWL_ComboBox*)GetPDFWindow(pPageView, TRUE)) {
+          static_cast<CPWL_ComboBox*>(GetPDFWindow(pPageView, TRUE))) {
     if (m_State.nIndex >= 0)
       pComboBox->SetSelect(m_State.nIndex);
     else {
-      if (CPWL_Edit* pEdit = (CPWL_Edit*)*pComboBox) {
+      if (CPWL_Edit* pEdit = pComboBox->GetEdit()) {
         pEdit->SetText(m_State.sValue.c_str());
         pEdit->SetSel(m_State.nStart, m_State.nEnd);
       }
     }
   }
 }
 
 CPWL_Wnd* CFFL_ComboBox::ResetPDFWindow(CPDFSDK_PageView* pPageView,
                                         FX_BOOL bRestoreValue) {
   if (bRestoreValue)
@@ skipping 57 matching lines @@
   if (nExport >= 0) {
     if (CPDF_FormField* pFormField = m_pWidget->GetFormField()) {
       swRet = pFormField->GetOptionValue(nExport);
       if (swRet.IsEmpty())
         swRet = pFormField->GetOptionLabel(nExport);
     }
   }
 
   return swRet;
 }