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      1 // Copyright 2016 PDFium Authors. All rights reserved.
      2 // Use of this source code is governed by a BSD-style license that can be
      3 // found in the LICENSE file.
      4 
      5 // Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com
      6 
      7 #ifndef XFA_FXFA_PARSER_CXFA_TRAVERSESTRATEGY_CONTENTAREACONTAINERLAYOUTITEM_H_
      8 #define XFA_FXFA_PARSER_CXFA_TRAVERSESTRATEGY_CONTENTAREACONTAINERLAYOUTITEM_H_
      9 
     10 #include "xfa/fxfa/parser/cxfa_containerlayoutitem.h"
     11 
     12 class CXFA_TraverseStrategy_ContentAreaContainerLayoutItem {
     13  public:
     14   static CXFA_ContainerLayoutItem* GetFirstChild(
     15       CXFA_ContainerLayoutItem* pLayoutItem) {
     16     for (CXFA_LayoutItem* pChildItem = pLayoutItem->m_pFirstChild; pChildItem;
     17          pChildItem = pChildItem->m_pNextSibling) {
     18       if (CXFA_ContainerLayoutItem* pContainer =
     19               pChildItem->AsContainerLayoutItem()) {
     20         return pContainer;
     21       }
     22     }
     23     return nullptr;
     24   }
     25 
     26   static CXFA_ContainerLayoutItem* GetNextSibling(
     27       CXFA_ContainerLayoutItem* pLayoutItem) {
     28     for (CXFA_LayoutItem* pChildItem = pLayoutItem->m_pNextSibling; pChildItem;
     29          pChildItem = pChildItem->m_pNextSibling) {
     30       if (CXFA_ContainerLayoutItem* pContainer =
     31               pChildItem->AsContainerLayoutItem()) {
     32         return pContainer;
     33       }
     34     }
     35     return nullptr;
     36   }
     37 
     38   static CXFA_ContainerLayoutItem* GetParent(
     39       CXFA_ContainerLayoutItem* pLayoutItem) {
     40     return static_cast<CXFA_ContainerLayoutItem*>(pLayoutItem->m_pParent);
     41   }
     42 };
     43 
     44 #endif  // XFA_FXFA_PARSER_CXFA_TRAVERSESTRATEGY_CONTENTAREACONTAINERLAYOUTITEM_H_
     45