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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_layoutprocessor.h"
#include "third_party/base/ptr_util.h"
#include "third_party/base/stl_util.h"
#include "xfa/fxfa/parser/cxfa_contentlayoutitem.h"
#include "xfa/fxfa/parser/cxfa_document.h"
#include "xfa/fxfa/parser/cxfa_itemlayoutprocessor.h"
#include "xfa/fxfa/parser/cxfa_layoutpagemgr.h"
#include "xfa/fxfa/parser/cxfa_localemgr.h"
#include "xfa/fxfa/parser/cxfa_measurement.h"
#include "xfa/fxfa/parser/cxfa_node.h"
#include "xfa/fxfa/parser/xfa_document_datamerger_imp.h"
#include "xfa/fxfa/parser/xfa_utils.h"
CXFA_LayoutProcessor::CXFA_LayoutProcessor(CXFA_Document* pDocument)
: m_pDocument(pDocument), m_nProgressCounter(0), m_bNeedLayout(true) {}
CXFA_LayoutProcessor::~CXFA_LayoutProcessor() {}
CXFA_Document* CXFA_LayoutProcessor::GetDocument() const {
return m_pDocument.Get();
}
int32_t CXFA_LayoutProcessor::StartLayout(bool bForceRestart) {
if (!bForceRestart && !IsNeedLayout())
return 100;
m_pRootItemLayoutProcessor.reset();
m_nProgressCounter = 0;
CXFA_Node* pFormPacketNode =
ToNode(m_pDocument->GetXFAObject(XFA_HASHCODE_Form));
if (!pFormPacketNode)
return -1;
CXFA_Node* pFormRoot =
pFormPacketNode->GetFirstChildByClass(XFA_Element::Subform);
if (!pFormRoot)
return -1;
if (!m_pLayoutPageMgr)
m_pLayoutPageMgr = pdfium::MakeUnique<CXFA_LayoutPageMgr>(this);
if (!m_pLayoutPageMgr->InitLayoutPage(pFormRoot))
return -1;
if (!m_pLayoutPageMgr->PrepareFirstPage(pFormRoot))
return -1;
m_pRootItemLayoutProcessor = pdfium::MakeUnique<CXFA_ItemLayoutProcessor>(
pFormRoot, m_pLayoutPageMgr.get());
m_nProgressCounter = 1;
return 0;
}
int32_t CXFA_LayoutProcessor::DoLayout() {
if (m_nProgressCounter < 1)
return -1;
XFA_ItemLayoutProcessorResult eStatus;
CXFA_Node* pFormNode = m_pRootItemLayoutProcessor->GetFormNode();
float fPosX =
pFormNode->JSNode()->GetMeasure(XFA_Attribute::X).ToUnit(XFA_UNIT_Pt);
float fPosY =
pFormNode->JSNode()->GetMeasure(XFA_Attribute::Y).ToUnit(XFA_UNIT_Pt);
do {
float fAvailHeight = m_pLayoutPageMgr->GetAvailHeight();
eStatus = m_pRootItemLayoutProcessor->DoLayout(true, fAvailHeight,
fAvailHeight, nullptr);
if (eStatus != XFA_ItemLayoutProcessorResult::Done)
m_nProgressCounter++;
CXFA_ContentLayoutItem* pLayoutItem =
m_pRootItemLayoutProcessor->ExtractLayoutItem();
if (pLayoutItem)
pLayoutItem->m_sPos = CFX_PointF(fPosX, fPosY);
m_pLayoutPageMgr->SubmitContentItem(pLayoutItem, eStatus);
} while (eStatus != XFA_ItemLayoutProcessorResult::Done);
if (eStatus == XFA_ItemLayoutProcessorResult::Done) {
m_pLayoutPageMgr->FinishPaginatedPageSets();
m_pLayoutPageMgr->SyncLayoutData();
m_bNeedLayout = false;
m_rgChangedContainers.clear();
}
return 100 * (eStatus == XFA_ItemLayoutProcessorResult::Done
? m_nProgressCounter
: m_nProgressCounter - 1) /
m_nProgressCounter;
}
bool CXFA_LayoutProcessor::IncrementLayout() {
if (m_bNeedLayout) {
StartLayout(true);
return DoLayout() == 100;
}
for (CXFA_Node* pNode : m_rgChangedContainers) {
CXFA_Node* pParentNode =
pNode->GetNodeItem(XFA_NODEITEM_Parent, XFA_ObjectType::ContainerNode);
if (!pParentNode)
return false;
if (!CXFA_ItemLayoutProcessor::IncrementRelayoutNode(this, pNode,
pParentNode)) {
return false;
}
}
m_rgChangedContainers.clear();
return true;
}
int32_t CXFA_LayoutProcessor::CountPages() const {
return m_pLayoutPageMgr ? m_pLayoutPageMgr->GetPageCount() : 0;
}
CXFA_ContainerLayoutItem* CXFA_LayoutProcessor::GetPage(int32_t index) const {
return m_pLayoutPageMgr ? m_pLayoutPageMgr->GetPage(index) : nullptr;
}
CXFA_LayoutItem* CXFA_LayoutProcessor::GetLayoutItem(CXFA_Node* pFormItem) {
return static_cast<CXFA_LayoutItem*>(
pFormItem->JSNode()->GetUserData(XFA_LAYOUTITEMKEY, false));
}
void CXFA_LayoutProcessor::AddChangedContainer(CXFA_Node* pContainer) {
if (!pdfium::ContainsValue(m_rgChangedContainers, pContainer))
m_rgChangedContainers.push_back(pContainer);
}
CXFA_ContainerLayoutItem* CXFA_LayoutProcessor::GetRootLayoutItem() const {
return m_pLayoutPageMgr ? m_pLayoutPageMgr->GetRootLayoutItem() : nullptr;
}
bool CXFA_LayoutProcessor::IsNeedLayout() {
return m_bNeedLayout || !m_rgChangedContainers.empty();
}
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