Add CFWL_ListBox::IsMultiSelection().

xfa/fwl/core/cfwl_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/cfwl_listbox.h"
 
 #include <algorithm>
 #include <memory>
@@ skipping 178 matching lines @@
 void CFWL_ListBox::SetSelItem(CFWL_ListItem* pItem, bool bSelect) {
   if (!pItem) {
     if (bSelect) {
       SelectAll();
     } else {
       ClearSelection();
       SetFocusItem(nullptr);
     }
     return;
   }
-  if (m_pProperties->m_dwStyleExes & FWL_STYLEEXT_LTB_MultiSelection)
+  if (IsMultiSelection())
     SetSelectionDirect(pItem, bSelect);
   else
     SetSelection(pItem, pItem, bSelect);
 }
 
 void CFWL_ListBox::GetDataProviderItemText(CFWL_ListItem* pItem,
                                            CFX_WideString& wsText) {
   if (!pItem)
     return;
   GetItemText(this, pItem, wsText);
@@ skipping 52 matching lines @@
   }
 }
 
 void CFWL_ListBox::SetSelectionDirect(CFWL_ListItem* pItem, bool bSelect) {
   uint32_t dwOldStyle = GetItemStyles(this, pItem);
   bSelect ? dwOldStyle |= FWL_ITEMSTATE_LTB_Selected
           : dwOldStyle &= ~FWL_ITEMSTATE_LTB_Selected;
   SetItemStyles(this, pItem, dwOldStyle);
 }
 
+bool CFWL_ListBox::IsMultiSelection() const {
+  return m_pProperties->m_dwStyleExes & FWL_STYLEEXT_LTB_MultiSelection;
+}
+
 bool CFWL_ListBox::IsItemSelected(CFWL_ListItem* pItem) {
   uint32_t dwState = GetItemStyles(this, pItem);
   return (dwState & FWL_ITEMSTATE_LTB_Selected) != 0;
 }
 
 void CFWL_ListBox::ClearSelection() {
-  bool bMulti = m_pProperties->m_dwStyleExes & FWL_STYLEEXT_LTB_MultiSelection;
+  bool bMulti = IsMultiSelection();
   int32_t iCount = CountItems(this);
   for (int32_t i = 0; i < iCount; i++) {
     CFWL_ListItem* pItem = GetItem(this, i);
     uint32_t dwState = GetItemStyles(this, pItem);
     if (!(dwState & FWL_ITEMSTATE_LTB_Selected))
       continue;
     SetSelectionDirect(pItem, false);
     if (!bMulti)
       return;
   }
 }
 
 void CFWL_ListBox::SelectAll() {
-  if (!(m_pProperties->m_dwStyleExes & FWL_STYLEEXT_LTB_MultiSelection))
+  if (!IsMultiSelection())
     return;
 
   int32_t iCount = CountItems(this);
   if (iCount <= 0)
     return;
 
   CFWL_ListItem* pItemStart = GetItem(this, 0);
   CFWL_ListItem* pItemEnd = GetItem(this, iCount - 1);
   SetSelection(pItemStart, pItemEnd, false);
 }
@@ skipping 542 matching lines @@
 
 void CFWL_ListBox::OnLButtonDown(CFWL_MsgMouse* pMsg) {
   m_bLButtonDown = true;
   if ((m_pProperties->m_dwStates & FWL_WGTSTATE_Focused) == 0)
     SetFocus(true);
 
   CFWL_ListItem* pItem = GetItemAtPoint(pMsg->m_fx, pMsg->m_fy);
   if (!pItem)
     return;
 
-  if (m_pProperties->m_dwStyleExes & FWL_STYLEEXT_LTB_MultiSelection) {
+  if (IsMultiSelection()) {
     if (pMsg->m_dwFlags & FWL_KEYFLAG_Ctrl) {
       bool bSelected = IsItemSelected(pItem);
       SetSelectionDirect(pItem, !bSelected);
       m_hAnchor = pItem;
     } else if (pMsg->m_dwFlags & FWL_KEYFLAG_Shift) {
       if (m_hAnchor)
         SetSelection(m_hAnchor, pItem, true);
       else
         SetSelectionDirect(pItem, true);
     } else {
@@ skipping 49 matching lines @@
     }
     default:
       break;
   }
 }
 
 void CFWL_ListBox::OnVK(CFWL_ListItem* pItem, bool bShift, bool bCtrl) {
   if (!pItem)
     return;
 
-  if (m_pProperties->m_dwStyleExes & FWL_STYLEEXT_LTB_MultiSelection) {
+  if (IsMultiSelection()) {
     if (bCtrl) {
       // Do nothing.
     } else if (bShift) {
       if (m_hAnchor)
         SetSelection(m_hAnchor, pItem, true);
       else
         SetSelectionDirect(pItem, true);
     } else {
       SetSelection(pItem, pItem, true);
       m_hAnchor = pItem;
@@ skipping 188 matching lines @@
 void CFWL_ListBox::DeleteAll() {
   m_ItemArray.clear();
 }
 
 uint32_t CFWL_ListBox::GetItemStates(CFWL_ListItem* pItem) {
   if (!pItem)
     return 0;
   return pItem->m_dwStates | pItem->m_dwCheckState;
 }