Add some consts and remove more casts in core/

core/fpdfdoc/doc_formfield.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 "core/fpdfapi/fpdf_parser/include/cfdf_document.h"
 #include "core/fpdfapi/fpdf_parser/include/cpdf_array.h"
 #include "core/fpdfapi/fpdf_parser/include/cpdf_document.h"
 #include "core/fpdfapi/fpdf_parser/include/cpdf_number.h"
@@ skipping 87 matching lines @@
       m_Type = ListBox;
       if (flags & 0x200000) {
         m_Flags |= FORMLIST_MULTISELECT;
       }
     }
     LoadDA();
   } else if (type_name == "Sig") {
     m_Type = Sign;
   }
 }
-CFX_WideString CPDF_FormField::GetFullName() {
+CFX_WideString CPDF_FormField::GetFullName() const {
   return ::GetFullName(m_pDict);
 }
 
 FX_BOOL CPDF_FormField::ResetField(FX_BOOL bNotify) {
   switch (m_Type) {
     case CPDF_FormField::CheckBox:
     case CPDF_FormField::RadioButton: {
       int iCount = CountControls();
       if (iCount) {
         // TODO(weili): Check whether anything special needs to be done for
@@ skipping 62 matching lines @@
         m_pDict->RemoveAt("V");
         m_pDict->RemoveAt("RV");
       }
       if (bNotify)
         NotifyAfterValueChange();
     } break;
   }
   return TRUE;
 }
 
-int CPDF_FormField::GetControlIndex(const CPDF_FormControl* pControl) {
+int CPDF_FormField::GetControlIndex(const CPDF_FormControl* pControl) const {
   if (!pControl)
     return -1;
 
   for (int i = 0; i < m_ControlList.GetSize(); i++) {
     if (m_ControlList.GetAt(i) == pControl)
       return i;
   }
   return -1;
 }
-int CPDF_FormField::GetFieldType() {
+
+int CPDF_FormField::GetFieldType() const {
   switch (m_Type) {
     case PushButton:
       return FIELDTYPE_PUSHBUTTON;
     case CheckBox:
       return FIELDTYPE_CHECKBOX;
     case RadioButton:
       return FIELDTYPE_RADIOBUTTON;
     case ComboBox:
       return FIELDTYPE_COMBOBOX;
     case ListBox:
       return FIELDTYPE_LISTBOX;
     case Text:
     case RichText:
     case File:
       return FIELDTYPE_TEXTFIELD;
     case Sign:
       return FIELDTYPE_SIGNATURE;
     default:
       break;
   }
   return FIELDTYPE_UNKNOWN;
 }
 
-CPDF_AAction CPDF_FormField::GetAdditionalAction() {
+CPDF_AAction CPDF_FormField::GetAdditionalAction() const {
   CPDF_Object* pObj = FPDF_GetFieldAttr(m_pDict, "AA");
   return CPDF_AAction(pObj ? pObj->GetDict() : nullptr);
 }
 
-CFX_WideString CPDF_FormField::GetAlternateName() {
+CFX_WideString CPDF_FormField::GetAlternateName() const {
   CPDF_Object* pObj = FPDF_GetFieldAttr(m_pDict, "TU");
   if (!pObj) {
     return L"";
   }
   return pObj->GetUnicodeText();
 }
-CFX_WideString CPDF_FormField::GetMappingName() {
+CFX_WideString CPDF_FormField::GetMappingName() const {
   CPDF_Object* pObj = FPDF_GetFieldAttr(m_pDict, "TM");
   if (!pObj) {
     return L"";
   }
   return pObj->GetUnicodeText();
 }
-uint32_t CPDF_FormField::GetFieldFlags() {
+uint32_t CPDF_FormField::GetFieldFlags() const {
   CPDF_Object* pObj = FPDF_GetFieldAttr(m_pDict, "Ff");
   if (!pObj) {
     return 0;
   }
   return pObj->GetInteger();
 }
-CFX_ByteString CPDF_FormField::GetDefaultStyle() {
+CFX_ByteString CPDF_FormField::GetDefaultStyle() const {
   CPDF_Object* pObj = FPDF_GetFieldAttr(m_pDict, "DS");
   if (!pObj) {
     return "";
   }
   return pObj->GetString();
 }
-CFX_WideString CPDF_FormField::GetRichTextString() {
+CFX_WideString CPDF_FormField::GetRichTextString() const {
   CPDF_Object* pObj = FPDF_GetFieldAttr(m_pDict, "RV");
   if (!pObj) {
     return L"";
   }
   return pObj->GetUnicodeText();
 }
-CFX_WideString CPDF_FormField::GetValue(FX_BOOL bDefault) {
+CFX_WideString CPDF_FormField::GetValue(FX_BOOL bDefault) const {
   if (GetType() == CheckBox || GetType() == RadioButton)
     return GetCheckValue(bDefault);
 
   CPDF_Object* pValue = FPDF_GetFieldAttr(m_pDict, bDefault ? "DV" : "V");
   if (!pValue) {
     if (!bDefault) {
       if (m_Type == RichText) {
         pValue = FPDF_GetFieldAttr(m_pDict, "V");
       }
       if (!pValue && m_Type != Text) {
@@ skipping 11 matching lines @@
       pValue = pValue->AsArray()->GetDirectObjectAt(0);
       if (pValue)
         return pValue->GetUnicodeText();
       break;
     default:
       break;
   }
   return CFX_WideString();
 }
 
-CFX_WideString CPDF_FormField::GetValue() {
+CFX_WideString CPDF_FormField::GetValue() const {
   return GetValue(FALSE);
 }
 
-CFX_WideString CPDF_FormField::GetDefaultValue() {
+CFX_WideString CPDF_FormField::GetDefaultValue() const {
   return GetValue(TRUE);
 }
 
 FX_BOOL CPDF_FormField::SetValue(const CFX_WideString& value,
                                  FX_BOOL bDefault,
                                  FX_BOOL bNotify) {
   switch (m_Type) {
     case CheckBox:
     case RadioButton: {
       SetCheckValue(value, bDefault, bNotify);
@@ skipping 46 matching lines @@
     default:
       break;
   }
   return TRUE;
 }
 
 FX_BOOL CPDF_FormField::SetValue(const CFX_WideString& value, FX_BOOL bNotify) {
   return SetValue(value, FALSE, bNotify);
 }
 
-int CPDF_FormField::GetMaxLen() {
+int CPDF_FormField::GetMaxLen() const {
   if (CPDF_Object* pObj = FPDF_GetFieldAttr(m_pDict, "MaxLen"))
     return pObj->GetInteger();
 
   for (int i = 0; i < m_ControlList.GetSize(); i++) {
     CPDF_FormControl* pControl = m_ControlList.GetAt(i);
     if (!pControl)
       continue;
 
     CPDF_Dictionary* pWidgetDict = pControl->m_pWidgetDict;
     if (pWidgetDict->KeyExist("MaxLen"))
       return pWidgetDict->GetIntegerBy("MaxLen");
   }
   return 0;
 }
 
-int CPDF_FormField::CountSelectedItems() {
+int CPDF_FormField::CountSelectedItems() const {
   CPDF_Object* pValue = FPDF_GetFieldAttr(m_pDict, "V");
   if (!pValue) {
     pValue = FPDF_GetFieldAttr(m_pDict, "I");
     if (!pValue)
       return 0;
   }
 
   if (pValue->IsString() || pValue->IsNumber())
     return pValue->GetString().IsEmpty() ? 0 : 1;
   if (CPDF_Array* pArray = pValue->AsArray())
     return pArray->GetCount();
   return 0;
 }
 
-int CPDF_FormField::GetSelectedIndex(int index) {
+int CPDF_FormField::GetSelectedIndex(int index) const {
   CPDF_Object* pValue = FPDF_GetFieldAttr(m_pDict, "V");
   if (!pValue) {
     pValue = FPDF_GetFieldAttr(m_pDict, "I");
     if (!pValue)
       return -1;
   }
   if (pValue->IsNumber())
     return pValue->GetInteger();
 
   CFX_WideString sel_value;
@@ skipping 34 matching lines @@
     if (!NotifyListOrComboBoxBeforeChange(csValue))
       return FALSE;
   }
   m_pDict->RemoveAt("V");
   m_pDict->RemoveAt("I");
   if (bNotify)
     NotifyListOrComboBoxAfterChange();
   return TRUE;
 }
 
-FX_BOOL CPDF_FormField::IsItemSelected(int index) {
+FX_BOOL CPDF_FormField::IsItemSelected(int index) const {
   ASSERT(GetType() == ComboBox || GetType() == ListBox);
   if (index < 0 || index >= CountOptions()) {
     return FALSE;
   }
   if (IsOptionSelected(index)) {
     return TRUE;
   }
   CFX_WideString opt_value = GetOptionValue(index);
   CPDF_Object* pValue = FPDF_GetFieldAttr(m_pDict, "V");
   if (!pValue) {
@@ skipping 88 matching lines @@
         m_pDict->RemoveAt("V");
         m_pDict->RemoveAt("I");
       }
     }
   }
   if (bNotify)
     NotifyListOrComboBoxAfterChange();
   return TRUE;
 }
 
-FX_BOOL CPDF_FormField::IsItemDefaultSelected(int index) {
+FX_BOOL CPDF_FormField::IsItemDefaultSelected(int index) const {
   ASSERT(GetType() == ComboBox || GetType() == ListBox);
   if (index < 0 || index >= CountOptions())
     return FALSE;
   int iDVIndex = GetDefaultSelectedItem();
   return iDVIndex >= 0 && iDVIndex == index;
 }
 
-int CPDF_FormField::GetDefaultSelectedItem() {
+int CPDF_FormField::GetDefaultSelectedItem() const {
   ASSERT(GetType() == ComboBox || GetType() == ListBox);
   CPDF_Object* pValue = FPDF_GetFieldAttr(m_pDict, "DV");
   if (!pValue)
     return -1;
   CFX_WideString csDV = pValue->GetUnicodeText();
   if (csDV.IsEmpty())
     return -1;
   for (int i = 0; i < CountOptions(); i++) {
     if (csDV == GetOptionValue(i))
       return i;
   }
   return -1;
 }
 
-int CPDF_FormField::CountOptions() {
+int CPDF_FormField::CountOptions() const {
   CPDF_Array* pArray = ToArray(FPDF_GetFieldAttr(m_pDict, "Opt"));
   return pArray ? pArray->GetCount() : 0;
 }
 
-CFX_WideString CPDF_FormField::GetOptionText(int index, int sub_index) {
+CFX_WideString CPDF_FormField::GetOptionText(int index, int sub_index) const {
   CPDF_Array* pArray = ToArray(FPDF_GetFieldAttr(m_pDict, "Opt"));
   if (!pArray)
     return CFX_WideString();
 
   CPDF_Object* pOption = pArray->GetDirectObjectAt(index);
   if (!pOption)
     return CFX_WideString();
   if (CPDF_Array* pOptionArray = pOption->AsArray())
     pOption = pOptionArray->GetDirectObjectAt(sub_index);
 
   CPDF_String* pString = ToString(pOption);
   return pString ? pString->GetUnicodeText() : CFX_WideString();
 }
-CFX_WideString CPDF_FormField::GetOptionLabel(int index) {
+CFX_WideString CPDF_FormField::GetOptionLabel(int index) const {
   return GetOptionText(index, 1);
 }
-CFX_WideString CPDF_FormField::GetOptionValue(int index) {
+CFX_WideString CPDF_FormField::GetOptionValue(int index) const {
   return GetOptionText(index, 0);
 }
 
-int CPDF_FormField::FindOption(CFX_WideString csOptLabel) {
+int CPDF_FormField::FindOption(CFX_WideString csOptLabel) const {
   for (int i = 0; i < CountOptions(); i++) {
     if (GetOptionValue(i) == csOptLabel)
       return i;
   }
   return -1;
 }
 
-int CPDF_FormField::FindOptionValue(const CFX_WideString& csOptValue) {
+int CPDF_FormField::FindOptionValue(const CFX_WideString& csOptValue) const {
   for (int i = 0; i < CountOptions(); i++) {
     if (GetOptionValue(i) == csOptValue)
       return i;
   }
   return -1;
 }
 
 #ifdef PDF_ENABLE_XFA
 int CPDF_FormField::InsertOption(CFX_WideString csOptLabel,
                                  int index,
@@ skipping 103 matching lines @@
   } else if (bChecked) {
     CFX_ByteString csIndex;
     csIndex.Format("%d", iControlIndex);
     m_pDict->SetAtName("V", csIndex);
   }
   if (bNotify && m_pForm->m_pFormNotify)
     m_pForm->m_pFormNotify->AfterCheckedStatusChange(this);
   return TRUE;
 }
 
-CFX_WideString CPDF_FormField::GetCheckValue(FX_BOOL bDefault) {
+CFX_WideString CPDF_FormField::GetCheckValue(FX_BOOL bDefault) const {
   ASSERT(GetType() == CheckBox || GetType() == RadioButton);
   CFX_WideString csExport = L"Off";
   int iCount = CountControls();
   for (int i = 0; i < iCount; i++) {
     CPDF_FormControl* pControl = GetControl(i);
     FX_BOOL bChecked =
         bDefault ? pControl->IsDefaultChecked() : pControl->IsChecked();
     if (bChecked) {
       csExport = pControl->GetExportValue();
       break;
@@ skipping 14 matching lines @@
     if (!bDefault)
       CheckControl(GetControlIndex(pControl), val);
     if (val)
       break;
   }
   if (bNotify && m_pForm->m_pFormNotify)
     m_pForm->m_pFormNotify->AfterCheckedStatusChange(this);
   return TRUE;
 }
 
-int CPDF_FormField::GetTopVisibleIndex() {
+int CPDF_FormField::GetTopVisibleIndex() const {
   CPDF_Object* pObj = FPDF_GetFieldAttr(m_pDict, "TI");
   return pObj ? pObj->GetInteger() : 0;
 }
 
-int CPDF_FormField::CountSelectedOptions() {
+int CPDF_FormField::CountSelectedOptions() const {
   CPDF_Array* pArray = ToArray(FPDF_GetFieldAttr(m_pDict, "I"));
   return pArray ? pArray->GetCount() : 0;
 }
 
-int CPDF_FormField::GetSelectedOptionIndex(int index) {
+int CPDF_FormField::GetSelectedOptionIndex(int index) const {
   CPDF_Array* pArray = ToArray(FPDF_GetFieldAttr(m_pDict, "I"));
   if (!pArray)
     return -1;
 
   int iCount = pArray->GetCount();
   if (iCount < 0 || index >= iCount)
     return -1;
   return pArray->GetIntegerAt(index);
 }
 
-FX_BOOL CPDF_FormField::IsOptionSelected(int iOptIndex) {
+FX_BOOL CPDF_FormField::IsOptionSelected(int iOptIndex) const {
   CPDF_Array* pArray = ToArray(FPDF_GetFieldAttr(m_pDict, "I"));
   if (!pArray)
     return FALSE;
 
   for (CPDF_Object* pObj : *pArray) {
     if (pObj->GetInteger() == iOptIndex)
       return TRUE;
   }
   return FALSE;
 }
@@ skipping 146 matching lines @@
     case ListBox:
       NotifyAfterSelectionChange();
       break;
     case ComboBox:
       NotifyAfterValueChange();
       break;
     default:
       break;
   }
 }