Split xfa_layout_appadapter

xfa/fxfa/parser/cxfa_traversestrategy_contentareacontainerlayoutitem.h

+// Copyright 2016 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_CXFA_TRAVERSESTRATEGY_CONTENTAREACONTAINERLAYOUTITEM_H_
+#define XFA_FXFA_PARSER_CXFA_TRAVERSESTRATEGY_CONTENTAREACONTAINERLAYOUTITEM_H_
+
+#include "xfa/fxfa/parser/cxfa_containerlayoutitem.h"
+
+class CXFA_TraverseStrategy_ContentAreaContainerLayoutItem {
+ public:
+  static 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 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 CXFA_ContainerLayoutItem* GetParent(
+      CXFA_ContainerLayoutItem* pLayoutItem) {
+    return static_cast<CXFA_ContainerLayoutItem*>(pLayoutItem->m_pParent);
+  }
+};
+
+#endif  // XFA_FXFA_PARSER_CXFA_TRAVERSESTRATEGY_CONTENTAREACONTAINERLAYOUTITEM_H_