Split xfa_object_imp into individual class files.

xfa/fxfa/parser/cxfa_attachnodelist.cpp

+// 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
+
+#include "xfa/fxfa/parser/xfa_object.h"
+
+CXFA_AttachNodeList::CXFA_AttachNodeList(CXFA_Document* pDocument,
+                                         CXFA_Node* pAttachNode)
+    : CXFA_NodeList(pDocument) {
+  m_pAttachNode = pAttachNode;
+}
+
+int32_t CXFA_AttachNodeList::GetLength() {
+  return m_pAttachNode->CountChildren(
+      XFA_Element::Unknown,
+      m_pAttachNode->GetElementType() == XFA_Element::Subform);
+}
+
+FX_BOOL CXFA_AttachNodeList::Append(CXFA_Node* pNode) {
+  CXFA_Node* pParent = pNode->GetNodeItem(XFA_NODEITEM_Parent);
+  if (pParent) {
+    pParent->RemoveChild(pNode);
+  }
+  return m_pAttachNode->InsertChild(pNode);
+}
+
+FX_BOOL CXFA_AttachNodeList::Insert(CXFA_Node* pNewNode,
+                                    CXFA_Node* pBeforeNode) {
+  CXFA_Node* pParent = pNewNode->GetNodeItem(XFA_NODEITEM_Parent);
+  if (pParent) {
+    pParent->RemoveChild(pNewNode);
+  }
+  return m_pAttachNode->InsertChild(pNewNode, pBeforeNode);
+}
+
+FX_BOOL CXFA_AttachNodeList::Remove(CXFA_Node* pNode) {
+  return m_pAttachNode->RemoveChild(pNode);
+}
+
+CXFA_Node* CXFA_AttachNodeList::Item(int32_t iIndex) {
+  return m_pAttachNode->GetChild(
+      iIndex, XFA_Element::Unknown,
+      m_pAttachNode->GetElementType() == XFA_Element::Subform);
+}