Simplify XFA event handling.

xfa/fxfa/parser/xfa_layout_itemlayout.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/fxfa/parser/xfa_layout_itemlayout.h"
 
 #include <algorithm>
 #include <memory>
@@ skipping 543 matching lines @@
     if (m_pOldLayoutItem->m_pPrev) {
       m_pOldLayoutItem->m_pPrev->m_pNext = NULL;
     }
     CXFA_FFNotify* pNotify =
         m_pOldLayoutItem->m_pFormNode->GetDocument()->GetParser()->GetNotify();
     CXFA_LayoutProcessor* pDocLayout =
         m_pOldLayoutItem->m_pFormNode->GetDocument()->GetDocLayout();
     CXFA_ContentLayoutItem* pOldLayoutItem = m_pOldLayoutItem;
     while (pOldLayoutItem) {
       CXFA_ContentLayoutItem* pNextOldLayoutItem = pOldLayoutItem->m_pNext;
-      pNotify->OnLayoutEvent(pDocLayout, pOldLayoutItem,
-                             XFA_LAYOUTEVENT_ItemRemoving);
+      pNotify->OnLayoutItemRemoving(pDocLayout, pOldLayoutItem);
       delete pOldLayoutItem;
       pOldLayoutItem = pNextOldLayoutItem;
     }
     m_pOldLayoutItem = NULL;
   }
   return pLayoutItem;
 }
 static FX_BOOL XFA_ItemLayoutProcessor_FindBreakNode(
     CXFA_Node* pContainerNode,
     CXFA_Node*& pCurActionNode,
@@ skipping 47 matching lines @@
       pGenerateNode->GetDocument()->GetDocLayout();
   CXFA_NodeIteratorTemplate<CXFA_Node, CXFA_TraverseStrategy_XFANode> sIterator(
       pGenerateNode);
   for (CXFA_Node* pNode = sIterator.GetCurrent(); pNode;
        pNode = sIterator.MoveToNext()) {
     CXFA_ContentLayoutItem* pCurLayoutItem =
         (CXFA_ContentLayoutItem*)pNode->GetUserData(XFA_LAYOUTITEMKEY);
     CXFA_ContentLayoutItem* pNextLayoutItem = NULL;
     while (pCurLayoutItem) {
       pNextLayoutItem = pCurLayoutItem->m_pNext;
-      pNotify->OnLayoutEvent(pDocLayout, pCurLayoutItem,
-                             XFA_LAYOUTEVENT_ItemRemoving);
+      pNotify->OnLayoutItemRemoving(pDocLayout, pCurLayoutItem);
       delete pCurLayoutItem;
       pCurLayoutItem = pNextLayoutItem;
     }
   }
   pGenerateNode->GetNodeItem(XFA_NODEITEM_Parent)->RemoveChild(pGenerateNode);
 }
 void CXFA_ItemLayoutProcessor::XFA_ItemLayoutProcessor_GotoNextContainerNode(
     CXFA_Node*& pCurActionNode,
     XFA_ItemLayoutProcessorStages& nCurStage,
     CXFA_Node* pParentContainer,
@@ skipping 1216 matching lines @@
       pFormNode);
   for (CXFA_Node* pNode = sIterator.MoveToNext(); pNode;
        pNode = sIterator.MoveToNext()) {
     if (pNode->IsContainerNode()) {
       CXFA_Node* pBindNode = pNode->GetBindData();
       if (pBindNode) {
         pBindNode->RemoveBindItem(pNode);
         pNode->SetObject(XFA_ATTRIBUTE_BindingNode, NULL);
       }
     }
-    pNode->SetFlag(XFA_NODEFLAG_UnusedNode);
+    pNode->SetFlag(XFA_NODEFLAG_UnusedNode, true);
   }
 }
 void CXFA_ItemLayoutProcessor::ProcessUnUseOverFlow(
     CXFA_Node* pLeaderNode,
     CXFA_Node* pTrailerNode,
     CXFA_ContentLayoutItem* pTrailerItem,
     CXFA_Node* pFormNode) {
   ProcessUnUseBinds(pLeaderNode);
   ProcessUnUseBinds(pTrailerNode);
   if (pFormNode == NULL) {
@@ skipping 1082 matching lines @@
         (int32_t)(uintptr_t)m_PendingNodesCount.GetValueAt(pTemplate);
     if (iCount >= iMax) {
       return FALSE;
     }
     iCount++;
     m_PendingNodesCount.SetAt(pTemplate, (void*)(uintptr_t)(iCount));
     return TRUE;
   }
   return TRUE;
 }