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/*
* Copyright (C) 2013-2015 Canonical, Ltd.
*
* This program is free software: you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 3, as published
* by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranties of
* MERCHANTABILITY, SATISFACTORY QUALITY, or FITNESS FOR A PARTICULAR
* PURPOSE. See the GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program. If not, see <http://www.gnu.org/licenses/>.
*
* Authors: Anthony Granger <grangeranthony@gmail.com>
* Stefano Verzegnassi <stefano92.100@gmail.com>
*/
#include "pdfdocument.h"
#include "pdfimageprovider.h"
#include "pdfthread.h"
#include <poppler/qt5/poppler-qt5.h>
#include <QDebug>
#include <QQmlEngine>
#include <QQmlContext>
#include <QThread>
PdfDocument::PdfDocument(QAbstractListModel *parent):
QAbstractListModel(parent)
, m_path("")
{
qRegisterMetaType<PdfPagesList>("PdfPagesList");
}
QHash<int, QByteArray> PdfDocument::roleNames() const
{
QHash<int, QByteArray> roles;
roles[WidthRole] = "width";
roles[HeightRole] = "height";
return roles;
}
int PdfDocument::rowCount(const QModelIndex & parent) const
{
Q_UNUSED(parent)
return m_pages.count();
}
QVariant PdfDocument::data(const QModelIndex & index, int role) const
{
if (index.row() < 0 || index.row() > m_pages.count())
return QVariant();
const PdfItem &pdfItem = m_pages.at(index.row());
switch (role) {
case WidthRole:
return pdfItem.width();
case HeightRole:
return pdfItem.height();
default:
return 0;
}
}
void PdfDocument::setPath(QString &pathName)
{
if (pathName.isEmpty())
return;
m_path = pathName;
Q_EMIT pathChanged();
if (!loadDocument(m_path))
return;
loadPages();
loadProvider();
}
bool PdfDocument::loadDocument(QString &pathName)
{
qDebug() << "Loading document...";
if (pathName.isEmpty()) {
qDebug() << "Can't load the document, path is empty.";
return false;
}
m_document = Poppler::Document::load(pathName);
if (!m_document || m_document->isLocked()) {
qDebug() << "ERROR : Can't open the document located at " + pathName;
Q_EMIT error("Can't open the document located at " + pathName);
delete m_document;
return false;
}
qDebug() << "Document loaded successfully !";
m_document->setRenderHint(Poppler::Document::Antialiasing, true);
m_document->setRenderHint(Poppler::Document::TextAntialiasing, true);
return true;
}
QDateTime PdfDocument::getDocumentDate(QString data)
{
if (!m_document)
return QDateTime();
if (data == "CreationDate" || data == "ModDate")
return m_document->date(data);
else
return QDateTime();
}
QString PdfDocument::getDocumentInfo(QString data)
{
if (!m_document)
return QString("");
if (data == "Title" || data == "Subject" || data == "Author" || data == "Creator" || data == "Producer")
return m_document->info(data);
else
return QString("");
}
bool PdfDocument::loadPages()
{
qDebug() << "Populating model...";
m_pages.clear();
if (!m_document)
return false;
PdfThread *pdfThread = new PdfThread();
pdfThread->setDocument(m_document);
connect(pdfThread, SIGNAL(resultReady(PdfPagesList)), this, SLOT(_q_populate(PdfPagesList)));
connect(pdfThread, SIGNAL(finished()), pdfThread, SLOT(deleteLater()));
pdfThread->start();
return true;
}
void PdfDocument::_q_populate(PdfPagesList pagesList)
{
qDebug() << "Number of pages:" << pagesList.count();
Q_FOREACH (Poppler::Page *page, pagesList) {
beginInsertRows(QModelIndex(), rowCount(), rowCount());
m_pages << page;
endInsertRows();
}
qDebug() << "Model has been successfully populated!";
Q_EMIT pagesLoaded();
}
void PdfDocument::loadProvider()
{
// WORKAROUND: QQuickImageProvider should create multiple threads to load more images at the same time.
// [QTBUG-37998] QQuickImageProvider can block its separate thread with ForceAsynchronousImageLoading
// Link: https://bugreports.qt.io/browse/QTBUG-37988
int newProvidersNumber = QThread::idealThreadCount();
if (newProvidersNumber != m_providersNumber) {
m_providersNumber = newProvidersNumber;
Q_EMIT providersNumberChanged();
}
qDebug() << "Ideal number of image providers is:" << m_providersNumber;
qDebug() << "Loading image provider(s)...";
QQmlEngine *engine = QQmlEngine::contextForObject(this)->engine();
for (int i=0; i<m_providersNumber; i++)
engine->addImageProvider(QLatin1String("poppler" + QByteArray::number(i)), new PdfImageProvider(m_document));
qDebug() << "Image provider(s) loaded successfully !";
}
PdfDocument::~PdfDocument()
{
}
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