// 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(); }