Replace some c-style cast with static_cast<>

Change-Id: I9dd6a36770f77f3df6c4395572785d37402eadc2
Reviewed-on: https://pdfium-review.googlesource.com/31350
Commit-Queue: dsinclair <dsinclair@chromium.org>
Reviewed-by: dsinclair <dsinclair@chromium.org>

3 files changed, 8 insertions, 10 deletions

diff --git a/fpdfsdk/formfiller/cffl_combobox.cpp b/fpdfsdk/formfiller/cffl_combobox.cpp
index 055b697669..8aa656b856 100644
--- a/fpdfsdk/formfiller/cffl_combobox.cpp
+++ b/fpdfsdk/formfiller/cffl_combobox.cpp
@@ -74,7 +74,7 @@ bool CFFL_ComboBox::OnChar(CPDFSDK_Annot* pAnnot,
 }
 
 bool CFFL_ComboBox::IsDataChanged(CPDFSDK_PageView* pPageView) {
-  CPWL_ComboBox* pWnd = (CPWL_ComboBox*)GetPDFWindow(pPageView, false);
+  auto* pWnd = static_cast<CPWL_ComboBox*>(GetPDFWindow(pPageView, false));
   if (!pWnd)
     return false;
 
@@ -250,12 +250,9 @@ void CFFL_ComboBox::OnSetFocus(CPWL_Edit* pEdit) {
 WideString CFFL_ComboBox::GetSelectExportText() {
   WideString swRet;
 
-  int nExport = -1;
   CPDFSDK_PageView* pPageView = GetCurPageView(true);
-  if (CPWL_ComboBox* pComboBox =
-          (CPWL_ComboBox*)GetPDFWindow(pPageView, false)) {
-    nExport = pComboBox->GetSelect();
-  }
+  auto* pComboBox = static_cast<CPWL_ComboBox*>(GetPDFWindow(pPageView, false));
+  int nExport = pComboBox ? pComboBox->GetSelect() : -1;
 
   if (nExport >= 0) {
     if (CPDF_FormField* pFormField = m_pWidget->GetFormField()) {
diff --git a/fpdfsdk/formfiller/cffl_formfiller.cpp b/fpdfsdk/formfiller/cffl_formfiller.cpp
index ac82e3ed47..261cb653e5 100644
--- a/fpdfsdk/formfiller/cffl_formfiller.cpp
+++ b/fpdfsdk/formfiller/cffl_formfiller.cpp
@@ -301,7 +301,7 @@ bool CFFL_FormFiller::Redo(CPDFSDK_Annot* pAnnot) {
 }
 
 void CFFL_FormFiller::SetFocusForAnnot(CPDFSDK_Annot* pAnnot, uint32_t nFlag) {
-  CPDFSDK_Widget* pWidget = (CPDFSDK_Widget*)pAnnot;
+  auto* pWidget = static_cast<CPDFSDK_Widget*>(pAnnot);
   UnderlyingPageType* pPage = pWidget->GetUnderlyingPage();
   CPDFSDK_PageView* pPageView = m_pFormFillEnv->GetPageView(pPage, true);
   if (CPWL_Wnd* pWnd = GetPDFWindow(pPageView, true))
diff --git a/fpdfsdk/formfiller/cffl_listbox.cpp b/fpdfsdk/formfiller/cffl_listbox.cpp
index 943412d509..bf24e116e5 100644
--- a/fpdfsdk/formfiller/cffl_listbox.cpp
+++ b/fpdfsdk/formfiller/cffl_listbox.cpp
@@ -81,7 +81,7 @@ bool CFFL_ListBox::OnChar(CPDFSDK_Annot* pAnnot,
 }
 
 bool CFFL_ListBox::IsDataChanged(CPDFSDK_PageView* pPageView) {
-  CPWL_ListBox* pListBox = (CPWL_ListBox*)GetPDFWindow(pPageView, false);
+  auto* pListBox = static_cast<CPWL_ListBox*>(GetPDFWindow(pPageView, false));
   if (!pListBox)
     return false;
 
@@ -140,8 +140,9 @@ void CFFL_ListBox::GetActionData(CPDFSDK_PageView* pPageView,
       if (m_pWidget->GetFieldFlags() & FIELDFLAG_MULTISELECT) {
         fa.sValue = L"";
       } else {
-        if (CPWL_ListBox* pListBox =
-                (CPWL_ListBox*)GetPDFWindow(pPageView, false)) {
+        auto* pListBox =
+            static_cast<CPWL_ListBox*>(GetPDFWindow(pPageView, false));
+        if (pListBox) {
           int32_t nCurSel = pListBox->GetCurSel();
           if (nCurSel >= 0)
             fa.sValue = m_pWidget->GetOptionLabel(nCurSel);