mirror of
https://github.com/JakubMelka/PDF4QT.git
synced 2025-06-05 21:59:17 +02:00
815 lines
24 KiB
C++
815 lines
24 KiB
C++
// Copyright (C) 2019-2021 Jakub Melka
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//
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// This file is part of Pdf4Qt.
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//
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// Pdf4Qt is free software: you can redistribute it and/or modify
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// it under the terms of the GNU Lesser General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// with the written consent of the copyright owner, any later version.
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//
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// Pdf4Qt is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU Lesser General Public License for more details.
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//
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// You should have received a copy of the GNU Lesser General Public License
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// along with Pdf4Qt. If not, see <https://www.gnu.org/licenses/>.
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#include "pdfitemmodels.h"
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#include "pdfdocument.h"
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#include "pdfdrawspacecontroller.h"
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#include <QFont>
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#include <QStyle>
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#include <QApplication>
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#include <QMimeDatabase>
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#include <QFileIconProvider>
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namespace pdf
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{
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PDFTreeItem::~PDFTreeItem()
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{
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qDeleteAll(m_children);
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}
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PDFTreeItemModel::PDFTreeItemModel(QObject* parent) :
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QAbstractItemModel(parent),
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m_document(nullptr)
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{
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}
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void PDFTreeItemModel::setDocument(const PDFModifiedDocument& document)
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{
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if (m_document != document)
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{
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m_document = document;
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// We must only update only, when document has been reset, i.e.
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// all document content has been changed.
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if (document.hasReset())
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{
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update();
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}
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}
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}
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bool PDFTreeItemModel::isEmpty() const
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{
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return rowCount(QModelIndex()) == 0;
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}
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QModelIndex PDFTreeItemModel::index(int row, int column, const QModelIndex& parent) const
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{
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if (hasIndex(row, column, parent))
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{
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const PDFTreeItem* parentItem = nullptr;
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if (!parent.isValid())
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{
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parentItem = m_rootItem.get();
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}
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else
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{
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parentItem = static_cast<PDFTreeItem*>(parent.internalPointer());
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}
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return createIndex(row, column, const_cast<PDFTreeItem*>(parentItem->getChild(row)));
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}
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return QModelIndex();
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}
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QModelIndex PDFTreeItemModel::parent(const QModelIndex& child) const
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{
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if (child.isValid())
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{
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const PDFTreeItem* childItem = static_cast<PDFTreeItem*>(child.internalPointer());
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const PDFTreeItem* parentItem = childItem->getParent();
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if (parentItem != m_rootItem.get())
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{
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return createIndex(parentItem->getRow(), child.column(), const_cast<PDFTreeItem*>(parentItem));
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}
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}
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return QModelIndex();
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}
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int PDFTreeItemModel::rowCount(const QModelIndex& parent) const
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{
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if (parent.isValid())
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{
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const PDFTreeItem* parentItem = static_cast<PDFTreeItem*>(parent.internalPointer());
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return parentItem->getChildCount();
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}
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return m_rootItem ? m_rootItem->getChildCount() : 0;
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}
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bool PDFTreeItemModel::hasChildren(const QModelIndex& parent) const
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{
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return rowCount(parent) > 0;
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}
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Qt::ItemFlags PDFTreeItemModel::flags(const QModelIndex& index) const
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{
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if (!index.isValid())
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{
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return Qt::NoItemFlags;
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}
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return QAbstractItemModel::flags(index);
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}
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void PDFOptionalContentTreeItemModel::setActivity(PDFOptionalContentActivity* activity)
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{
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m_activity = activity;
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}
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int PDFOptionalContentTreeItemModel::columnCount(const QModelIndex& parent) const
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{
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Q_UNUSED(parent);
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return 1;
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}
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QVariant PDFOptionalContentTreeItemModel::data(const QModelIndex& index, int role) const
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{
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if (!index.isValid())
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{
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return QVariant();
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}
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const PDFOptionalContentTreeItem* item = static_cast<const PDFOptionalContentTreeItem*>(index.internalPointer());
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switch (role)
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{
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case Qt::DisplayRole:
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return item->getText();
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case Qt::CheckStateRole:
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{
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if (item->getReference() != PDFObjectReference())
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{
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if (m_activity)
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{
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switch (m_activity->getState(item->getReference()))
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{
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case OCState::ON:
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return Qt::Checked;
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case OCState::OFF:
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return Qt::Unchecked;
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case OCState::Unknown:
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return Qt::PartiallyChecked;
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default:
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{
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Q_ASSERT(false);
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break;
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}
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}
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}
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return Qt::PartiallyChecked;
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}
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break;
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}
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default:
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break;
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}
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return QVariant();
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}
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void PDFOptionalContentTreeItemModel::update()
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{
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beginResetModel();
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PDFOptionalContentTreeItem* root = new PDFOptionalContentTreeItem(nullptr, PDFObjectReference(), QString(), false);
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m_rootItem.reset(root);
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if (m_document)
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{
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const PDFOptionalContentProperties* optionalContentProperties = m_document->getCatalog()->getOptionalContentProperties();
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if (optionalContentProperties->isValid())
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{
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const PDFOptionalContentConfiguration& configuration = optionalContentProperties->getDefaultConfiguration();
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const PDFObject& orderObject = m_document->getObject(configuration.getOrder());
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const std::vector<PDFObjectReference>& ocgs = optionalContentProperties->getAllOptionalContentGroups();
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const std::vector<PDFObjectReference>& locked = configuration.getLocked();
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// We must detect cycles in the reference array
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std::set<PDFObjectReference> lockedOptionalContentGroups(locked.cbegin(), locked.cend());
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std::set<PDFObjectReference> optionalContentGroups(ocgs.cbegin(), ocgs.cend());
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std::set<PDFObjectReference> processedReferences;
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PDFDocumentDataLoaderDecorator loader(m_document);
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std::function<PDFOptionalContentTreeItem*(const PDFObject&)> processObject = [&, this](const PDFObject& object) -> PDFOptionalContentTreeItem*
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{
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PDFObject dereferencedObject = object;
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if (object.isReference())
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{
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PDFObjectReference reference = object.getReference();
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if (optionalContentGroups.count(reference))
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{
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const PDFOptionalContentGroup& ocg = optionalContentProperties->getOptionalContentGroup(reference);
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return new PDFOptionalContentTreeItem(nullptr, reference, ocg.getName(), lockedOptionalContentGroups.count(reference));
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}
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else if (!processedReferences.count(reference))
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{
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processedReferences.insert(reference);
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dereferencedObject = m_document->getStorage().getObject(reference);
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}
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else
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{
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// Error - we have cyclic references
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return nullptr;
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}
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}
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if (dereferencedObject.isArray())
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{
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const PDFArray* array = dereferencedObject.getArray();
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const size_t arraySize = array->getCount();
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// We must have at least one item!
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if (arraySize == 0)
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{
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return nullptr;
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}
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QString text;
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size_t i = 0;
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// Try to retrieve group name
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const PDFObject& firstItem = m_document->getObject(array->getItem(0));
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if (firstItem.isString())
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{
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text = loader.readTextString(firstItem, QString());
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++i;
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}
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std::unique_ptr<PDFOptionalContentTreeItem> parentItem(new PDFOptionalContentTreeItem(nullptr, PDFObjectReference(), text, false));
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for (; i < arraySize; ++i)
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{
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if (PDFOptionalContentTreeItem* item = processObject(array->getItem(i)))
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{
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parentItem->addCreatedChild(item);
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}
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else
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{
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// Item cannot be parsed properly
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return nullptr;
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}
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}
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return parentItem.release();
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}
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return nullptr;
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};
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m_rootItem.reset(processObject(orderObject));
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}
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}
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endResetModel();
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}
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Qt::ItemFlags PDFOptionalContentTreeItemModel::flags(const QModelIndex& index) const
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{
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Qt::ItemFlags flags = PDFTreeItemModel::flags(index);
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if (!index.isValid())
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{
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return flags;
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}
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const PDFOptionalContentTreeItem* item = static_cast<const PDFOptionalContentTreeItem*>(index.internalPointer());
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if (item->getReference() != PDFObjectReference())
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{
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flags = flags | Qt::ItemIsUserCheckable | Qt::ItemNeverHasChildren;
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if (item->isLocked())
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{
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flags &= ~Qt::ItemIsEnabled;
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}
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}
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return flags;
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}
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QString PDFOptionalContentTreeItem::getText() const
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{
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if (!m_text.isEmpty())
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{
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return m_text;
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}
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else if (getParent())
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{
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return static_cast<const PDFOptionalContentTreeItem*>(getParent())->getText();
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}
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return QString();
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}
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bool PDFOptionalContentTreeItemModel::setData(const QModelIndex& index, const QVariant& value, int role)
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{
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if (!index.isValid())
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{
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return false;
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}
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if (m_activity && role == Qt::CheckStateRole)
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{
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const PDFOptionalContentTreeItem* item = static_cast<const PDFOptionalContentTreeItem*>(index.internalPointer());
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if (item->getReference() != PDFObjectReference() && !item->isLocked())
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{
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Qt::CheckState newState = static_cast<Qt::CheckState>(value.toInt());
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m_activity->setState(item->getReference(), (newState == Qt::Checked) ? OCState::ON : OCState::OFF);
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return true;
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}
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}
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return false;
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}
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PDFOutlineTreeItem::PDFOutlineTreeItem(PDFOutlineTreeItem* parent, QSharedPointer<PDFOutlineItem> outlineItem) :
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PDFTreeItem(parent),
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m_outlineItem(qMove(outlineItem))
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{
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size_t childCount = m_outlineItem->getChildCount();
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for (size_t i = 0; i < childCount; ++i)
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{
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addCreatedChild(new PDFOutlineTreeItem(nullptr, m_outlineItem->getChildPtr(i)));
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}
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}
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int PDFOutlineTreeItemModel::columnCount(const QModelIndex& parent) const
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{
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Q_UNUSED(parent);
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return 1;
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}
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QVariant PDFOutlineTreeItemModel::data(const QModelIndex& index, int role) const
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{
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if (!index.isValid())
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{
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return QVariant();
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}
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const PDFOutlineTreeItem* item = static_cast<const PDFOutlineTreeItem*>(index.internalPointer());
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const PDFOutlineItem* outlineItem = item->getOutlineItem();
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switch (role)
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{
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case Qt::DisplayRole:
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return outlineItem->getTitle();
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case Qt::TextColorRole:
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return outlineItem->getTextColor();
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case Qt::FontRole:
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{
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QFont font = QApplication::font();
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font.setPointSize(10);
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font.setBold(outlineItem->isFontBold());
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font.setItalic(outlineItem->isFontItalics());
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return font;
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}
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case Qt::DecorationRole:
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{
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if (!m_icon.isNull())
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{
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return m_icon;
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}
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break;
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}
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default:
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break;
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}
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return QVariant();
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}
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void PDFOutlineTreeItemModel::update()
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{
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beginResetModel();
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QSharedPointer<PDFOutlineItem> outlineRoot;
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if (m_document)
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{
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outlineRoot = m_document->getCatalog()->getOutlineRootPtr();
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}
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if (outlineRoot)
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{
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m_rootItem.reset(new PDFOutlineTreeItem(nullptr, qMove(outlineRoot)));
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}
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else
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{
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m_rootItem.reset();
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}
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endResetModel();
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}
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Qt::ItemFlags PDFOutlineTreeItemModel::flags(const QModelIndex& index) const
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{
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Qt::ItemFlags flags = PDFTreeItemModel::flags(index);
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if (!index.isValid())
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{
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return flags;
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}
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const PDFOutlineTreeItem* item = static_cast<const PDFOutlineTreeItem*>(index.internalPointer());
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if (item->getChildCount() == 0)
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{
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flags = flags | Qt::ItemNeverHasChildren;
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}
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return flags;
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}
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const PDFAction* PDFOutlineTreeItemModel::getAction(const QModelIndex& index) const
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{
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if (index.isValid())
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{
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const PDFOutlineTreeItem* item = static_cast<const PDFOutlineTreeItem*>(index.internalPointer());
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const PDFOutlineItem* outlineItem = item->getOutlineItem();
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return outlineItem->getAction();
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}
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return nullptr;
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}
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int PDFAttachmentsTreeItemModel::columnCount(const QModelIndex& parent) const
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{
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Q_UNUSED(parent);
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return EndColumn;
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}
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QVariant PDFAttachmentsTreeItemModel::data(const QModelIndex& index, int role) const
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{
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if (!index.isValid())
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{
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return QVariant();
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}
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const PDFAttachmentsTreeItem* item = static_cast<const PDFAttachmentsTreeItem*>(index.internalPointer());
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switch (role)
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{
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case Qt::DisplayRole:
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{
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switch (index.column())
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{
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case Title:
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return item->getTitle();
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case Description:
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return item->getDescription();
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default:
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Q_ASSERT(false);
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break;
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}
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break;
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}
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case Qt::DecorationRole:
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{
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switch (index.column())
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{
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case Title:
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return item->getIcon();
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case Description:
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return QVariant();
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default:
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Q_ASSERT(false);
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break;
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}
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break;
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}
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default:
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break;
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}
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return QVariant();
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}
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void PDFAttachmentsTreeItemModel::update()
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{
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beginResetModel();
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m_rootItem.reset();
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if (m_document)
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{
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const std::map<QByteArray, PDFFileSpecification>& embeddedFiles = m_document->getCatalog()->getEmbeddedFiles();
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if (!embeddedFiles.empty())
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{
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QMimeDatabase mimeDatabase;
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QFileIconProvider fileIconProvider;
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fileIconProvider.setOptions(QFileIconProvider::DontUseCustomDirectoryIcons);
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PDFAttachmentsTreeItem* root = new PDFAttachmentsTreeItem(nullptr, QIcon(), QString(), QString(), nullptr);
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m_rootItem.reset(root);
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std::map<QString, PDFAttachmentsTreeItem*> subroots;
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for (const auto& embeddedFile : embeddedFiles)
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{
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const PDFFileSpecification* specification = &embeddedFile.second;
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const PDFEmbeddedFile* file = specification->getPlatformFile();
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if (!file)
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{
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continue;
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}
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QString fileName = specification->getPlatformFileName();
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QString description = specification->getDescription();
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// Jakub Melka: try to obtain mime type from subtype, if it fails, then form file name.
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// We do not obtain type from data, because it can be slow (files can be large).
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QMimeType type = mimeDatabase.mimeTypeForName(file->getSubtype());
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if (!type.isValid())
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{
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type = mimeDatabase.mimeTypeForFile(fileName, QMimeDatabase::MatchExtension);
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}
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// Get icon and select folder, to which file belongs
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QIcon icon;
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QString fileTypeName = "@GENERIC";
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QString fileTypeDescription = tr("Files");
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if (type.isValid())
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{
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icon = QIcon::fromTheme(type.iconName());
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if (icon.isNull())
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{
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icon = QIcon::fromTheme(type.genericIconName());
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}
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fileTypeName = type.name();
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fileTypeDescription = type.comment();
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}
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if (icon.isNull())
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{
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icon = fileIconProvider.icon(QFileInfo(fileName));
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}
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if (icon.isNull())
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{
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icon = QApplication::style()->standardIcon(QStyle::SP_FileIcon);
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}
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// Create subroot
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PDFAttachmentsTreeItem* subroot = nullptr;
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auto it = subroots.find(fileTypeName);
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if (it == subroots.cend())
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{
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QIcon folderIcon = QApplication::style()->standardIcon(QStyle::SP_DirIcon);
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subroot = new PDFAttachmentsTreeItem(nullptr, qMove(folderIcon), fileTypeDescription, QString(), nullptr);
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root->addCreatedChild(subroot);
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subroots[fileTypeName] = subroot;
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}
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else
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{
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subroot = it->second;
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}
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// Create item
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subroot->addCreatedChild(new PDFAttachmentsTreeItem(nullptr, qMove(icon), qMove(fileName), qMove(description), specification));
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}
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}
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}
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endResetModel();
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}
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|
|
Qt::ItemFlags PDFAttachmentsTreeItemModel::flags(const QModelIndex& index) const
|
|
{
|
|
if (!index.isValid())
|
|
{
|
|
return Qt::NoItemFlags;
|
|
}
|
|
|
|
if (rowCount(index) > 0)
|
|
{
|
|
return Qt::ItemIsEnabled;
|
|
}
|
|
|
|
if (index.column() == Title)
|
|
{
|
|
return Qt::ItemIsEnabled | Qt::ItemIsSelectable | Qt::ItemNeverHasChildren;
|
|
}
|
|
|
|
return Qt::ItemIsEnabled | Qt::ItemNeverHasChildren;
|
|
}
|
|
|
|
const PDFFileSpecification* PDFAttachmentsTreeItemModel::getFileSpecification(const QModelIndex& index) const
|
|
{
|
|
if (index.isValid())
|
|
{
|
|
return static_cast<const PDFAttachmentsTreeItem*>(index.internalPointer())->getFileSpecification();
|
|
}
|
|
|
|
return nullptr;
|
|
}
|
|
|
|
PDFThumbnailsItemModel::PDFThumbnailsItemModel(const PDFDrawWidgetProxy* proxy, QObject* parent) :
|
|
QAbstractItemModel(parent),
|
|
m_proxy(proxy),
|
|
m_thumbnailSize(100),
|
|
m_extraItemWidthHint(0),
|
|
m_extraItemHeighHint(0),
|
|
m_pageCount(0),
|
|
m_document(nullptr)
|
|
{
|
|
connect(proxy, &PDFDrawWidgetProxy::pageImageChanged, this, &PDFThumbnailsItemModel::onPageImageChanged);
|
|
}
|
|
|
|
bool PDFThumbnailsItemModel::isEmpty() const
|
|
{
|
|
return rowCount(QModelIndex()) == 0;
|
|
}
|
|
|
|
QModelIndex PDFThumbnailsItemModel::index(int row, int column, const QModelIndex& parent) const
|
|
{
|
|
if (parent.isValid())
|
|
{
|
|
return QModelIndex();
|
|
}
|
|
|
|
return createIndex(row, column, nullptr);
|
|
}
|
|
|
|
QModelIndex PDFThumbnailsItemModel::parent(const QModelIndex& child) const
|
|
{
|
|
Q_UNUSED(child);
|
|
return QModelIndex();
|
|
}
|
|
|
|
int PDFThumbnailsItemModel::rowCount(const QModelIndex& parent) const
|
|
{
|
|
if (parent.isValid())
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
return m_pageCount;
|
|
}
|
|
|
|
int PDFThumbnailsItemModel::columnCount(const QModelIndex& parent) const
|
|
{
|
|
Q_UNUSED(parent);
|
|
return 1;
|
|
}
|
|
|
|
QVariant PDFThumbnailsItemModel::data(const QModelIndex& index, int role) const
|
|
{
|
|
if (!index.isValid() || !m_document)
|
|
{
|
|
return QVariant();
|
|
}
|
|
|
|
const int page = index.row();
|
|
switch (role)
|
|
{
|
|
case Qt::DisplayRole:
|
|
return QString::number(page + 1);
|
|
|
|
case Qt::DecorationRole:
|
|
{
|
|
QString key = getKey(index.row());
|
|
|
|
QPixmap pixmap;
|
|
if (!m_thumbnailCache.find(key, &pixmap))
|
|
{
|
|
QImage thumbnail = m_proxy->drawThumbnailImage(index.row(), m_thumbnailSize);
|
|
if (!thumbnail.isNull())
|
|
{
|
|
pixmap = QPixmap::fromImage(qMove(thumbnail));
|
|
m_thumbnailCache.insert(key, pixmap);
|
|
}
|
|
}
|
|
|
|
return pixmap;
|
|
}
|
|
|
|
case Qt::TextAlignmentRole:
|
|
{
|
|
return int(Qt::AlignHCenter | Qt::AlignBottom);
|
|
}
|
|
|
|
case Qt::SizeHintRole:
|
|
{
|
|
const PDFPage* page = m_document->getCatalog()->getPage(index.row());
|
|
QSizeF pageSize = page->getRotatedMediaBox().size();
|
|
pageSize.scale(m_thumbnailSize, m_thumbnailSize, Qt::KeepAspectRatio);
|
|
return pageSize.toSize() + QSize(m_extraItemWidthHint, m_extraItemHeighHint);
|
|
break;
|
|
}
|
|
|
|
default:
|
|
break;
|
|
}
|
|
|
|
return QVariant();
|
|
}
|
|
|
|
void PDFThumbnailsItemModel::setThumbnailsSize(int size)
|
|
{
|
|
if (m_thumbnailSize != size)
|
|
{
|
|
emit layoutAboutToBeChanged();
|
|
m_thumbnailSize = size;
|
|
m_thumbnailCache.clear();
|
|
emit layoutChanged();
|
|
}
|
|
}
|
|
|
|
void PDFThumbnailsItemModel::setDocument(const PDFModifiedDocument& document)
|
|
{
|
|
if (m_document != document)
|
|
{
|
|
if (document.hasReset() || document.hasFlag(PDFModifiedDocument::Annotation))
|
|
{
|
|
beginResetModel();
|
|
m_thumbnailCache.clear();
|
|
m_document = document;
|
|
|
|
m_pageCount = 0;
|
|
if (m_document)
|
|
{
|
|
m_pageCount = static_cast<int>(m_document->getCatalog()->getPageCount());
|
|
}
|
|
endResetModel();
|
|
}
|
|
else
|
|
{
|
|
// Soft reset
|
|
m_document = document;
|
|
Q_ASSERT(!m_document || m_pageCount == static_cast<int>(m_document->getCatalog()->getPageCount()));
|
|
}
|
|
}
|
|
}
|
|
|
|
PDFInteger PDFThumbnailsItemModel::getPageIndex(const QModelIndex& index) const
|
|
{
|
|
return index.row();
|
|
}
|
|
|
|
void PDFThumbnailsItemModel::onPageImageChanged(bool all, const std::vector<PDFInteger>& pages)
|
|
{
|
|
Q_UNUSED(all);
|
|
Q_UNUSED(pages);
|
|
|
|
if (all)
|
|
{
|
|
m_thumbnailCache.clear();
|
|
emit dataChanged(index(0, 0, QModelIndex()), index(rowCount(QModelIndex()) - 1, 0, QModelIndex()));
|
|
}
|
|
else
|
|
{
|
|
const int rowCount = this->rowCount(QModelIndex());
|
|
for (const PDFInteger pageIndex : pages)
|
|
{
|
|
if (pageIndex < rowCount)
|
|
{
|
|
m_thumbnailCache.remove(getKey(pageIndex));
|
|
emit dataChanged(index(pageIndex, 0, QModelIndex()), index(pageIndex, 0, QModelIndex()));
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
QString PDFThumbnailsItemModel::getKey(int pageIndex) const
|
|
{
|
|
return QString("PDF_THUMBNAIL_%1").arg(pageIndex);
|
|
}
|
|
|
|
PDFAttachmentsTreeItem::PDFAttachmentsTreeItem(PDFAttachmentsTreeItem* parent, QIcon icon, QString title, QString description, const PDFFileSpecification* fileSpecification) :
|
|
PDFTreeItem(parent),
|
|
m_icon(qMove(icon)),
|
|
m_title(qMove(title)),
|
|
m_description(qMove(description)),
|
|
m_fileSpecification(nullptr)
|
|
{
|
|
if (fileSpecification)
|
|
{
|
|
m_fileSpecification = std::make_unique<PDFFileSpecification>(*fileSpecification);
|
|
}
|
|
}
|
|
|
|
PDFAttachmentsTreeItem::~PDFAttachmentsTreeItem()
|
|
{
|
|
|
|
}
|
|
|
|
} // namespace pdf
|