Make CXFA_LayoutItem inherit from fxcrt::TreeNode<>.
Long-term, we'd like to manage CXFA_LayoutItem via RetainedTreeNodes,
so this CL converts to a similar API before tackling the issue of
memory management itself.
Change-Id: I89d0ebbf564a236fe7a85dc82f334628d7965745
Reviewed-on: https://pdfium-review.googlesource.com/c/pdfium/+/53390
Commit-Queue: Tom Sepez <tsepez@chromium.org>
Reviewed-by: Lei Zhang <thestig@chromium.org>
diff --git a/xfa/fxfa/layout/cxfa_layoutitem.cpp b/xfa/fxfa/layout/cxfa_layoutitem.cpp
index 1a7798c..a59da61 100644
--- a/xfa/fxfa/layout/cxfa_layoutitem.cpp
+++ b/xfa/fxfa/layout/cxfa_layoutitem.cpp
@@ -78,74 +78,9 @@
CXFA_ViewLayoutItem* CXFA_LayoutItem::GetPage() const {
for (CXFA_LayoutItem* pCurNode = const_cast<CXFA_LayoutItem*>(this); pCurNode;
- pCurNode = pCurNode->m_pParent) {
+ pCurNode = pCurNode->GetParent()) {
if (pCurNode->m_pFormNode->GetElementType() == XFA_Element::PageArea)
return pCurNode->AsViewLayoutItem();
}
return nullptr;
}
-void CXFA_LayoutItem::AppendLastChild(CXFA_LayoutItem* pChildItem) {
- if (pChildItem->m_pParent)
- pChildItem->m_pParent->RemoveChild(pChildItem);
-
- pChildItem->m_pParent = this;
- if (!m_pFirstChild) {
- m_pFirstChild = pChildItem;
- return;
- }
-
- CXFA_LayoutItem* pExistingChildItem = m_pFirstChild;
- while (pExistingChildItem->m_pNextSibling)
- pExistingChildItem = pExistingChildItem->m_pNextSibling;
-
- pExistingChildItem->m_pNextSibling = pChildItem;
-}
-
-void CXFA_LayoutItem::AppendFirstChild(CXFA_LayoutItem* pChildItem) {
- if (pChildItem->m_pParent)
- pChildItem->m_pParent->RemoveChild(pChildItem);
-
- pChildItem->m_pParent = this;
- if (!m_pFirstChild) {
- m_pFirstChild = pChildItem;
- return;
- }
-
- CXFA_LayoutItem* pExistingChildItem = m_pFirstChild;
- m_pFirstChild = pChildItem;
- m_pFirstChild->m_pNextSibling = pExistingChildItem;
-}
-
-void CXFA_LayoutItem::InsertAfter(CXFA_LayoutItem* pThisChild,
- CXFA_LayoutItem* pThatChild) {
- if (pThatChild->m_pParent != this)
- return;
-
- if (pThisChild->m_pParent)
- pThisChild->m_pParent = nullptr;
-
- pThisChild->m_pParent = this;
-
- CXFA_LayoutItem* pExistingChild = pThatChild->m_pNextSibling;
- pThatChild->m_pNextSibling = pThisChild;
- pThisChild->m_pNextSibling = pExistingChild;
-}
-
-void CXFA_LayoutItem::RemoveChild(CXFA_LayoutItem* pChildItem) {
- if (pChildItem->m_pParent != this)
- return;
-
- if (m_pFirstChild == pChildItem) {
- m_pFirstChild = pChildItem->m_pNextSibling;
- } else {
- CXFA_LayoutItem* pExistingChildItem = m_pFirstChild;
- while (pExistingChildItem &&
- pExistingChildItem->m_pNextSibling != pChildItem) {
- pExistingChildItem = pExistingChildItem->m_pNextSibling;
- }
- if (pExistingChildItem)
- pExistingChildItem->m_pNextSibling = pChildItem->m_pNextSibling;
- }
- pChildItem->m_pNextSibling = nullptr;
- pChildItem->m_pParent = nullptr;
-}
diff --git a/xfa/fxfa/layout/cxfa_layoutitem.h b/xfa/fxfa/layout/cxfa_layoutitem.h
index 3319942..cc85ce0 100644
--- a/xfa/fxfa/layout/cxfa_layoutitem.h
+++ b/xfa/fxfa/layout/cxfa_layoutitem.h
@@ -7,6 +7,7 @@
#ifndef XFA_FXFA_LAYOUT_CXFA_LAYOUTITEM_H_
#define XFA_FXFA_LAYOUT_CXFA_LAYOUTITEM_H_
+#include "core/fxcrt/tree_node.h"
#include "core/fxcrt/unowned_ptr.h"
#include "xfa/fxfa/parser/cxfa_document.h"
@@ -14,9 +15,9 @@
class CXFA_LayoutProcessor;
class CXFA_ViewLayoutItem;
-class CXFA_LayoutItem {
+class CXFA_LayoutItem : public TreeNode<CXFA_LayoutItem> {
public:
- virtual ~CXFA_LayoutItem();
+ ~CXFA_LayoutItem() override;
bool IsViewLayoutItem() const { return m_ItemType == kViewItem; }
bool IsContentLayoutItem() const { return m_ItemType == kContentItem; }
@@ -26,28 +27,15 @@
const CXFA_ContentLayoutItem* AsContentLayoutItem() const;
CXFA_ViewLayoutItem* GetPage() const;
- CXFA_LayoutItem* GetParent() const { return m_pParent; }
- CXFA_LayoutItem* GetFirstChild() const { return m_pFirstChild; }
- CXFA_LayoutItem* GetNextSibling() const { return m_pNextSibling; }
CXFA_Node* GetFormNode() const { return m_pFormNode.Get(); }
void SetFormNode(CXFA_Node* pNode) { m_pFormNode = pNode; }
- void AppendLastChild(CXFA_LayoutItem* pChildItem);
- void AppendFirstChild(CXFA_LayoutItem* pChildItem);
- void RemoveChild(CXFA_LayoutItem* pChildItem);
-
- // Insert |pThisChild| after |pThatChild|.
- void InsertAfter(CXFA_LayoutItem* pThisChild, CXFA_LayoutItem* pThatChild);
-
protected:
enum ItemType { kViewItem, kContentItem };
CXFA_LayoutItem(CXFA_Node* pNode, ItemType type);
private:
const ItemType m_ItemType;
- CXFA_LayoutItem* m_pParent = nullptr; // Raw, intra-tree pointer.
- CXFA_LayoutItem* m_pFirstChild = nullptr; // Raw, intra-tree pointer.
- CXFA_LayoutItem* m_pNextSibling = nullptr; // Raw, intra-tree pointer.
UnownedPtr<CXFA_Node> m_pFormNode;
};