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diff --git a/xfa/fxfa/parser/xfa_layout_appadapter.h b/xfa/fxfa/parser/xfa_layout_appadapter.h
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+// 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
+
+#ifndef XFA_FXFA_PARSER_XFA_LAYOUT_APPADAPTER_H_
+#define XFA_FXFA_PARSER_XFA_LAYOUT_APPADAPTER_H_
+
+#include "xfa/fxfa/parser/xfa_doclayout.h"
+
+class CXFA_TraverseStrategy_PageAreaContainerLayoutItem {
+ public:
+ static inline CXFA_ContainerLayoutItem* GetFirstChild(
+ CXFA_ContainerLayoutItem* pLayoutItem) {
+ if (pLayoutItem->m_pFormNode->GetClassID() == XFA_ELEMENT_PageSet) {
+ return (CXFA_ContainerLayoutItem*)pLayoutItem->m_pFirstChild;
+ }
+ return NULL;
+ }
+ static inline CXFA_ContainerLayoutItem* GetNextSibling(
+ CXFA_ContainerLayoutItem* pLayoutItem) {
+ return (CXFA_ContainerLayoutItem*)pLayoutItem->m_pNextSibling;
+ }
+ static inline CXFA_ContainerLayoutItem* GetParent(
+ CXFA_ContainerLayoutItem* pLayoutItem) {
+ return (CXFA_ContainerLayoutItem*)pLayoutItem->m_pParent;
+ }
+};
+class CXFA_TraverseStrategy_ContentAreaContainerLayoutItem {
+ public:
+ static inline CXFA_ContainerLayoutItem* GetFirstChild(
+ CXFA_ContainerLayoutItem* pLayoutItem) {
+ for (CXFA_LayoutItem* pChildItem = pLayoutItem->m_pFirstChild; pChildItem;
+ pChildItem = pChildItem->m_pNextSibling) {
+ if (CXFA_ContainerLayoutItem* pContainer =
+ pChildItem->AsContainerLayoutItem()) {
+ return pContainer;
+ }
+ }
+ return nullptr;
+ }
+ static inline CXFA_ContainerLayoutItem* GetNextSibling(
+ CXFA_ContainerLayoutItem* pLayoutItem) {
+ for (CXFA_LayoutItem* pChildItem = pLayoutItem->m_pNextSibling; pChildItem;
+ pChildItem = pChildItem->m_pNextSibling) {
+ if (CXFA_ContainerLayoutItem* pContainer =
+ pChildItem->AsContainerLayoutItem()) {
+ return pContainer;
+ }
+ }
+ return nullptr;
+ }
+ static inline CXFA_ContainerLayoutItem* GetParent(
+ CXFA_ContainerLayoutItem* pLayoutItem) {
+ return (CXFA_ContainerLayoutItem*)pLayoutItem->m_pParent;
+ }
+};
+class CXFA_TraverseStrategy_ContentLayoutItem {
+ public:
+ static inline CXFA_ContentLayoutItem* GetFirstChild(
+ CXFA_ContentLayoutItem* pLayoutItem) {
+ return (CXFA_ContentLayoutItem*)pLayoutItem->m_pFirstChild;
+ }
+ static inline CXFA_ContentLayoutItem* GetNextSibling(
+ CXFA_ContentLayoutItem* pLayoutItem) {
+ return (CXFA_ContentLayoutItem*)pLayoutItem->m_pNextSibling;
+ }
+ static inline CXFA_ContentLayoutItem* GetParent(
+ CXFA_ContentLayoutItem* pLayoutItem) {
+ return (CXFA_ContentLayoutItem*)pLayoutItem->m_pParent;
+ }
+};
+FX_DWORD XFA_GetRelevant(CXFA_Node* pFormItem, FX_DWORD dwParentRelvant);
+void XFA_ReleaseLayoutItem(CXFA_LayoutItem* pLayoutItem);
+
+#endif // XFA_FXFA_PARSER_XFA_LAYOUT_APPADAPTER_H_