134 lines
4.4 KiB
C++
134 lines
4.4 KiB
C++
// Copyright 2016 PDFium Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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// Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com
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#include "xfa/fxfa/layout/cxfa_layoutprocessor.h"
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#include "fxjs/xfa/cjx_object.h"
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#include "third_party/base/ptr_util.h"
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#include "third_party/base/stl_util.h"
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#include "xfa/fxfa/layout/cxfa_contentlayoutitem.h"
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#include "xfa/fxfa/layout/cxfa_contentlayoutprocessor.h"
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#include "xfa/fxfa/layout/cxfa_viewlayoutprocessor.h"
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#include "xfa/fxfa/parser/cxfa_document.h"
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#include "xfa/fxfa/parser/cxfa_localemgr.h"
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#include "xfa/fxfa/parser/cxfa_measurement.h"
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#include "xfa/fxfa/parser/cxfa_node.h"
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#include "xfa/fxfa/parser/cxfa_subform.h"
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#include "xfa/fxfa/parser/xfa_document_datamerger_imp.h"
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#include "xfa/fxfa/parser/xfa_utils.h"
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// static
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CXFA_LayoutProcessor* CXFA_LayoutProcessor::FromDocument(
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const CXFA_Document* pXFADoc) {
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return static_cast<CXFA_LayoutProcessor*>(pXFADoc->GetLayoutProcessor());
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}
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CXFA_LayoutProcessor::CXFA_LayoutProcessor() = default;
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CXFA_LayoutProcessor::~CXFA_LayoutProcessor() = default;
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void CXFA_LayoutProcessor::SetForceRelayout(bool bForceRestart) {
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m_bNeedLayout = bForceRestart;
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}
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int32_t CXFA_LayoutProcessor::StartLayout(bool bForceRestart) {
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if (!bForceRestart && !NeedLayout())
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return 100;
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m_pContentLayoutProcessor.reset();
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m_nProgressCounter = 0;
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CXFA_Node* pFormPacketNode =
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ToNode(GetDocument()->GetXFAObject(XFA_HASHCODE_Form));
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if (!pFormPacketNode)
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return -1;
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CXFA_Subform* pFormRoot =
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pFormPacketNode->GetFirstChildByClass<CXFA_Subform>(XFA_Element::Subform);
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if (!pFormRoot)
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return -1;
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if (!m_pViewLayoutProcessor)
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m_pViewLayoutProcessor = pdfium::MakeUnique<CXFA_ViewLayoutProcessor>(this);
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if (!m_pViewLayoutProcessor->InitLayoutPage(pFormRoot))
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return -1;
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if (!m_pViewLayoutProcessor->PrepareFirstPage(pFormRoot))
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return -1;
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m_pContentLayoutProcessor = pdfium::MakeUnique<CXFA_ContentLayoutProcessor>(
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pFormRoot, m_pViewLayoutProcessor.get());
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m_nProgressCounter = 1;
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return 0;
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}
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int32_t CXFA_LayoutProcessor::DoLayout() {
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if (m_nProgressCounter < 1)
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return -1;
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CXFA_ContentLayoutProcessor::Result eStatus;
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CXFA_Node* pFormNode = m_pContentLayoutProcessor->GetFormNode();
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float fPosX =
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pFormNode->JSObject()->GetMeasureInUnit(XFA_Attribute::X, XFA_Unit::Pt);
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float fPosY =
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pFormNode->JSObject()->GetMeasureInUnit(XFA_Attribute::Y, XFA_Unit::Pt);
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do {
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float fAvailHeight = m_pViewLayoutProcessor->GetAvailHeight();
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eStatus =
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m_pContentLayoutProcessor->DoLayout(true, fAvailHeight, fAvailHeight);
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if (eStatus != CXFA_ContentLayoutProcessor::Result::kDone)
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m_nProgressCounter++;
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RetainPtr<CXFA_ContentLayoutItem> pLayoutItem =
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m_pContentLayoutProcessor->ExtractLayoutItem();
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if (pLayoutItem)
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pLayoutItem->m_sPos = CFX_PointF(fPosX, fPosY);
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m_pViewLayoutProcessor->SubmitContentItem(pLayoutItem, eStatus);
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} while (eStatus != CXFA_ContentLayoutProcessor::Result::kDone);
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if (eStatus == CXFA_ContentLayoutProcessor::Result::kDone) {
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m_pViewLayoutProcessor->FinishPaginatedPageSets();
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m_pViewLayoutProcessor->SyncLayoutData();
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m_bNeedLayout = false;
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m_rgChangedContainers.clear();
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}
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return 100 *
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(eStatus == CXFA_ContentLayoutProcessor::Result::kDone
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? m_nProgressCounter
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: m_nProgressCounter - 1) /
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m_nProgressCounter;
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}
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bool CXFA_LayoutProcessor::IncrementLayout() {
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if (m_bNeedLayout) {
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StartLayout(true);
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return DoLayout() == 100;
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}
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return m_rgChangedContainers.empty();
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}
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int32_t CXFA_LayoutProcessor::CountPages() const {
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return m_pViewLayoutProcessor ? m_pViewLayoutProcessor->GetPageCount() : 0;
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}
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CXFA_ViewLayoutItem* CXFA_LayoutProcessor::GetPage(int32_t index) const {
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return m_pViewLayoutProcessor ? m_pViewLayoutProcessor->GetPage(index)
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: nullptr;
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}
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CXFA_LayoutItem* CXFA_LayoutProcessor::GetLayoutItem(CXFA_Node* pFormItem) {
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return pFormItem->JSObject()->GetLayoutItem();
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}
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void CXFA_LayoutProcessor::AddChangedContainer(CXFA_Node* pContainer) {
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if (!pdfium::ContainsValue(m_rgChangedContainers, pContainer))
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m_rgChangedContainers.push_back(pContainer);
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}
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bool CXFA_LayoutProcessor::NeedLayout() const {
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return m_bNeedLayout || !m_rgChangedContainers.empty();
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}
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