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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/layout/cxfa_layoutprocessor.h"
#include "fxjs/gc/container_trace.h"
#include "fxjs/xfa/cjx_object.h"
#include "v8/include/cppgc/heap.h"
#include "xfa/fxfa/layout/cxfa_contentlayoutitem.h"
#include "xfa/fxfa/layout/cxfa_contentlayoutprocessor.h"
#include "xfa/fxfa/layout/cxfa_viewlayoutprocessor.h"
#include "xfa/fxfa/parser/cxfa_document.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/cxfa_subform.h"
#include "xfa/fxfa/parser/xfa_document_datamerger_imp.h"
#include "xfa/fxfa/parser/xfa_utils.h"
// static
CXFA_LayoutProcessor* CXFA_LayoutProcessor::FromDocument(
const CXFA_Document* pXFADoc) {
return static_cast<CXFA_LayoutProcessor*>(pXFADoc->GetLayoutProcessor());
}
CXFA_LayoutProcessor::CXFA_LayoutProcessor(cppgc::Heap* pHeap)
: m_pHeap(pHeap) {}
CXFA_LayoutProcessor::~CXFA_LayoutProcessor() = default;
void CXFA_LayoutProcessor::Trace(cppgc::Visitor* visitor) const {
CXFA_Document::LayoutProcessorIface::Trace(visitor);
visitor->Trace(m_pViewLayoutProcessor);
visitor->Trace(m_pContentLayoutProcessor);
}
void CXFA_LayoutProcessor::SetForceRelayout() {
m_bNeedLayout = true;
}
int32_t CXFA_LayoutProcessor::StartLayout() {
return NeedLayout() ? RestartLayout() : 100;
}
int32_t CXFA_LayoutProcessor::RestartLayout() {
m_pContentLayoutProcessor = nullptr;
m_nProgressCounter = 0;
CXFA_Node* pFormPacketNode =
ToNode(GetDocument()->GetXFAObject(XFA_HASHCODE_Form));
if (!pFormPacketNode)
return -1;
CXFA_Subform* pFormRoot =
pFormPacketNode->GetFirstChildByClass<CXFA_Subform>(XFA_Element::Subform);
if (!pFormRoot)
return -1;
if (!m_pViewLayoutProcessor) {
m_pViewLayoutProcessor =
cppgc::MakeGarbageCollected<CXFA_ViewLayoutProcessor>(
GetHeap()->GetAllocationHandle(), GetHeap(), this);
}
if (!m_pViewLayoutProcessor->InitLayoutPage(pFormRoot))
return -1;
if (!m_pViewLayoutProcessor->PrepareFirstPage(pFormRoot))
return -1;
m_pContentLayoutProcessor =
cppgc::MakeGarbageCollected<CXFA_ContentLayoutProcessor>(
GetHeap()->GetAllocationHandle(), GetHeap(), pFormRoot,
m_pViewLayoutProcessor);
m_nProgressCounter = 1;
return 0;
}
int32_t CXFA_LayoutProcessor::DoLayout() {
if (m_nProgressCounter < 1)
return -1;
CXFA_ContentLayoutProcessor::Result eStatus;
CXFA_Node* pFormNode = m_pContentLayoutProcessor->GetFormNode();
float fPosX =
pFormNode->JSObject()->GetMeasureInUnit(XFA_Attribute::X, XFA_Unit::Pt);
float fPosY =
pFormNode->JSObject()->GetMeasureInUnit(XFA_Attribute::Y, XFA_Unit::Pt);
do {
float fAvailHeight = m_pViewLayoutProcessor->GetAvailHeight();
eStatus =
m_pContentLayoutProcessor->DoLayout(true, fAvailHeight, fAvailHeight);
if (eStatus != CXFA_ContentLayoutProcessor::Result::kDone)
m_nProgressCounter++;
CXFA_ContentLayoutItem* pLayoutItem =
m_pContentLayoutProcessor->ExtractLayoutItem();
if (pLayoutItem)
pLayoutItem->m_sPos = CFX_PointF(fPosX, fPosY);
m_pViewLayoutProcessor->SubmitContentItem(pLayoutItem, eStatus);
} while (eStatus != CXFA_ContentLayoutProcessor::Result::kDone);
if (eStatus == CXFA_ContentLayoutProcessor::Result::kDone) {
m_pViewLayoutProcessor->FinishPaginatedPageSets();
m_pViewLayoutProcessor->SyncLayoutData();
m_bHasChangedContainers = false;
m_bNeedLayout = false;
}
return 100 *
(eStatus == CXFA_ContentLayoutProcessor::Result::kDone
? m_nProgressCounter
: m_nProgressCounter - 1) /
m_nProgressCounter;
}
bool CXFA_LayoutProcessor::IncrementLayout() {
if (m_bNeedLayout) {
RestartLayout();
return DoLayout() == 100;
}
return !m_bHasChangedContainers;
}
int32_t CXFA_LayoutProcessor::CountPages() const {
return m_pViewLayoutProcessor ? m_pViewLayoutProcessor->GetPageCount() : 0;
}
CXFA_ViewLayoutItem* CXFA_LayoutProcessor::GetPage(int32_t index) const {
return m_pViewLayoutProcessor ? m_pViewLayoutProcessor->GetPage(index)
: nullptr;
}
CXFA_LayoutItem* CXFA_LayoutProcessor::GetLayoutItem(CXFA_Node* pFormItem) {
return pFormItem->JSObject()->GetLayoutItem();
}
void CXFA_LayoutProcessor::SetHasChangedContainer() {
m_bHasChangedContainers = true;
}
bool CXFA_LayoutProcessor::NeedLayout() const {
return m_bNeedLayout || m_bHasChangedContainers;
}