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// 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/cxfa_layoutitem.h"
#include "fxjs/xfa/cjx_object.h"
#include "xfa/fxfa/cxfa_ffnotify.h"
#include "xfa/fxfa/parser/cxfa_containerlayoutitem.h"
#include "xfa/fxfa/parser/cxfa_contentlayoutitem.h"
#include "xfa/fxfa/parser/cxfa_margin.h"
#include "xfa/fxfa/parser/cxfa_measurement.h"
#include "xfa/fxfa/parser/cxfa_node.h"
void XFA_ReleaseLayoutItem(CXFA_LayoutItem* pLayoutItem) {
CXFA_LayoutItem* pNode = pLayoutItem->m_pFirstChild;
CXFA_Document* pDocument = pLayoutItem->GetFormNode()->GetDocument();
CXFA_FFNotify* pNotify = pDocument->GetNotify();
CXFA_LayoutProcessor* pDocLayout = pDocument->GetLayoutProcessor();
while (pNode) {
CXFA_LayoutItem* pNext = pNode->m_pNextSibling;
pNode->m_pParent = nullptr;
pNotify->OnLayoutItemRemoving(pDocLayout, pNode);
XFA_ReleaseLayoutItem(pNode);
pNode = pNext;
}
pNotify->OnLayoutItemRemoving(pDocLayout, pLayoutItem);
if (pLayoutItem->GetFormNode()->GetElementType() == XFA_Element::PageArea) {
pNotify->OnPageEvent(ToContainerLayoutItem(pLayoutItem),
XFA_PAGEVIEWEVENT_PostRemoved);
}
delete pLayoutItem;
}
CXFA_LayoutItem::CXFA_LayoutItem(CXFA_Node* pNode, ItemType type)
: m_ItemType(type), m_pFormNode(pNode) {}
CXFA_LayoutItem::~CXFA_LayoutItem() = default;
CXFA_ContainerLayoutItem* CXFA_LayoutItem::AsContainerLayoutItem() {
return IsContainerLayoutItem() ? static_cast<CXFA_ContainerLayoutItem*>(this)
: nullptr;
}
CXFA_ContentLayoutItem* CXFA_LayoutItem::AsContentLayoutItem() {
return IsContentLayoutItem() ? static_cast<CXFA_ContentLayoutItem*>(this)
: nullptr;
}
CXFA_ContainerLayoutItem* CXFA_LayoutItem::GetPage() const {
for (CXFA_LayoutItem* pCurNode = const_cast<CXFA_LayoutItem*>(this); pCurNode;
pCurNode = pCurNode->m_pParent) {
if (pCurNode->m_pFormNode->GetElementType() == XFA_Element::PageArea)
return pCurNode->AsContainerLayoutItem();
}
return nullptr;
}
void CXFA_LayoutItem::AddChild(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::AddHeadChild(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::InsertChild(CXFA_LayoutItem* pBeforeItem,
CXFA_LayoutItem* pChildItem) {
if (pBeforeItem->m_pParent != this)
return;
if (pChildItem->m_pParent)
pChildItem->m_pParent = nullptr;
pChildItem->m_pParent = this;
CXFA_LayoutItem* pExistingChildItem = pBeforeItem->m_pNextSibling;
pBeforeItem->m_pNextSibling = pChildItem;
pChildItem->m_pNextSibling = pExistingChildItem;
}
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;
}
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