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/****************************************************************************
**
** Copyright (C) 2012 Nokia Corporation and/or its subsidiary(-ies).
** Contact: http://www.qt-project.org/
**
** This file is part of the demonstration applications of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** GNU Lesser General Public License Usage
** This file may be used under the terms of the GNU Lesser General Public
** License version 2.1 as published by the Free Software Foundation and
** appearing in the file LICENSE.LGPL included in the packaging of this
** file. Please review the following information to ensure the GNU Lesser
** General Public License version 2.1 requirements will be met:
** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
**
** In addition, as a special exception, Nokia gives you certain additional
** rights. These rights are described in the Nokia Qt LGPL Exception
** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU General
** Public License version 3.0 as published by the Free Software Foundation
** and appearing in the file LICENSE.GPL included in the packaging of this
** file. Please review the following information to ensure the GNU General
** Public License version 3.0 requirements will be met:
** http://www.gnu.org/copyleft/gpl.html.
**
** Other Usage
** Alternatively, this file may be used in accordance with the terms and
** conditions contained in a signed written agreement between you and Nokia.
**
**
**
**
**
**
** $QT_END_LICENSE$
**
****************************************************************************/
#include "downloadmanager.h"
#include "autosaver.h"
#include "browserapplication.h"
#include "networkaccessmanager.h"
#include <math.h>
#include <QtCore/QMetaEnum>
#include <QtCore/QSettings>
#include <QtGui/QDesktopServices>
#include <QtGui/QFileDialog>
#include <QtGui/QHeaderView>
#include <QtGui/QFileIconProvider>
#include <QtCore/QDebug>
#include <QtWebKit/QWebSettings>
/*!
DownloadItem is a widget that is displayed in the download manager list.
It moves the data from the QNetworkReply into the QFile as well
as update the information/progressbar and report errors.
*/
DownloadItem::DownloadItem(QNetworkReply *reply, bool requestFileName, QWidget *parent)
: QWidget(parent)
, m_reply(reply)
, m_requestFileName(requestFileName)
, m_bytesReceived(0)
{
setupUi(this);
QPalette p = downloadInfoLabel->palette();
p.setColor(QPalette::Text, Qt::darkGray);
downloadInfoLabel->setPalette(p);
progressBar->setMaximum(0);
tryAgainButton->hide();
connect(stopButton, SIGNAL(clicked()), this, SLOT(stop()));
connect(openButton, SIGNAL(clicked()), this, SLOT(open()));
connect(tryAgainButton, SIGNAL(clicked()), this, SLOT(tryAgain()));
init();
}
void DownloadItem::init()
{
if (!m_reply)
return;
// attach to the m_reply
m_url = m_reply->url();
m_reply->setParent(this);
connect(m_reply, SIGNAL(readyRead()), this, SLOT(downloadReadyRead()));
connect(m_reply, SIGNAL(error(QNetworkReply::NetworkError)),
this, SLOT(error(QNetworkReply::NetworkError)));
connect(m_reply, SIGNAL(downloadProgress(qint64,qint64)),
this, SLOT(downloadProgress(qint64,qint64)));
connect(m_reply, SIGNAL(metaDataChanged()),
this, SLOT(metaDataChanged()));
connect(m_reply, SIGNAL(finished()),
this, SLOT(finished()));
// reset info
downloadInfoLabel->clear();
progressBar->setValue(0);
getFileName();
// start timer for the download estimation
m_downloadTime.start();
if (m_reply->error() != QNetworkReply::NoError) {
error(m_reply->error());
finished();
}
}
void DownloadItem::getFileName()
{
QSettings settings;
settings.beginGroup(QLatin1String("downloadmanager"));
QString defaultLocation = QDesktopServices::storageLocation(QDesktopServices::DesktopLocation);
QString downloadDirectory = settings.value(QLatin1String("downloadDirectory"), defaultLocation).toString();
if (!downloadDirectory.isEmpty())
downloadDirectory += QLatin1Char('/');
QString defaultFileName = saveFileName(downloadDirectory);
QString fileName = defaultFileName;
if (m_requestFileName) {
fileName = QFileDialog::getSaveFileName(this, tr("Save File"), defaultFileName);
if (fileName.isEmpty()) {
m_reply->close();
fileNameLabel->setText(tr("Download canceled: %1").arg(QFileInfo(defaultFileName).fileName()));
return;
}
}
m_output.setFileName(fileName);
fileNameLabel->setText(QFileInfo(m_output.fileName()).fileName());
if (m_requestFileName)
downloadReadyRead();
}
QString DownloadItem::saveFileName(const QString &directory) const
{
// Move this function into QNetworkReply to also get file name sent from the server
QString path = m_url.path();
QFileInfo info(path);
QString baseName = info.completeBaseName();
QString endName = info.suffix();
if (baseName.isEmpty()) {
baseName = QLatin1String("unnamed_download");
qDebug() << "DownloadManager:: downloading unknown file:" << m_url;
}
QString name = directory + baseName + QLatin1Char('.') + endName;
if (QFile::exists(name)) {
// already exists, don't overwrite
int i = 1;
do {
name = directory + baseName + QLatin1Char('-') + QString::number(i++) + QLatin1Char('.') + endName;
} while (QFile::exists(name));
}
return name;
}
void DownloadItem::stop()
{
setUpdatesEnabled(false);
stopButton->setEnabled(false);
stopButton->hide();
tryAgainButton->setEnabled(true);
tryAgainButton->show();
setUpdatesEnabled(true);
m_reply->abort();
}
void DownloadItem::open()
{
QFileInfo info(m_output);
QUrl url = QUrl::fromLocalFile(info.absolutePath());
QDesktopServices::openUrl(url);
}
void DownloadItem::tryAgain()
{
if (!tryAgainButton->isEnabled())
return;
tryAgainButton->setEnabled(false);
tryAgainButton->setVisible(false);
stopButton->setEnabled(true);
stopButton->setVisible(true);
progressBar->setVisible(true);
QNetworkReply *r = BrowserApplication::networkAccessManager()->get(QNetworkRequest(m_url));
if (m_reply)
m_reply->deleteLater();
if (m_output.exists())
m_output.remove();
m_reply = r;
init();
emit statusChanged();
}
void DownloadItem::downloadReadyRead()
{
if (m_requestFileName && m_output.fileName().isEmpty())
return;
if (!m_output.isOpen()) {
// in case someone else has already put a file there
if (!m_requestFileName)
getFileName();
if (!m_output.open(QIODevice::WriteOnly)) {
downloadInfoLabel->setText(tr("Error opening save file: %1")
.arg(m_output.errorString()));
stopButton->click();
emit statusChanged();
return;
}
emit statusChanged();
}
if (-1 == m_output.write(m_reply->readAll())) {
downloadInfoLabel->setText(tr("Error saving: %1")
.arg(m_output.errorString()));
stopButton->click();
}
}
void DownloadItem::error(QNetworkReply::NetworkError)
{
qDebug() << "DownloadItem::error" << m_reply->errorString() << m_url;
downloadInfoLabel->setText(tr("Network Error: %1").arg(m_reply->errorString()));
tryAgainButton->setEnabled(true);
tryAgainButton->setVisible(true);
}
void DownloadItem::metaDataChanged()
{
qDebug() << "DownloadItem::metaDataChanged: not handled.";
}
void DownloadItem::downloadProgress(qint64 bytesReceived, qint64 bytesTotal)
{
m_bytesReceived = bytesReceived;
if (bytesTotal == -1) {
progressBar->setValue(0);
progressBar->setMaximum(0);
} else {
progressBar->setValue(bytesReceived);
progressBar->setMaximum(bytesTotal);
}
updateInfoLabel();
}
void DownloadItem::updateInfoLabel()
{
if (m_reply->error() == QNetworkReply::NoError)
return;
qint64 bytesTotal = progressBar->maximum();
bool running = !downloadedSuccessfully();
// update info label
double speed = m_bytesReceived * 1000.0 / m_downloadTime.elapsed();
double timeRemaining = ((double)(bytesTotal - m_bytesReceived)) / speed;
QString timeRemainingString = tr("seconds");
if (timeRemaining > 60) {
timeRemaining = timeRemaining / 60;
timeRemainingString = tr("minutes");
}
timeRemaining = floor(timeRemaining);
// When downloading the eta should never be 0
if (timeRemaining == 0)
timeRemaining = 1;
QString info;
if (running) {
QString remaining;
if (bytesTotal != 0)
remaining = tr("- %4 %5 remaining")
.arg(timeRemaining)
.arg(timeRemainingString);
info = tr("%1 of %2 (%3/sec) %4")
.arg(dataString(m_bytesReceived))
.arg(bytesTotal == 0 ? tr("?") : dataString(bytesTotal))
.arg(dataString((int)speed))
.arg(remaining);
} else {
if (m_bytesReceived == bytesTotal)
info = dataString(m_output.size());
else
info = tr("%1 of %2 - Stopped")
.arg(dataString(m_bytesReceived))
.arg(dataString(bytesTotal));
}
downloadInfoLabel->setText(info);
}
QString DownloadItem::dataString(int size) const
{
QString unit;
if (size < 1024) {
unit = tr("bytes");
} else if (size < 1024*1024) {
size /= 1024;
unit = tr("kB");
} else {
size /= 1024*1024;
unit = tr("MB");
}
return QString(QLatin1String("%1 %2")).arg(size).arg(unit);
}
bool DownloadItem::downloading() const
{
return (progressBar->isVisible());
}
bool DownloadItem::downloadedSuccessfully() const
{
return (stopButton->isHidden() && tryAgainButton->isHidden());
}
void DownloadItem::finished()
{
progressBar->hide();
stopButton->setEnabled(false);
stopButton->hide();
m_output.close();
updateInfoLabel();
emit statusChanged();
}
/*!
DownloadManager is a Dialog that contains a list of DownloadItems
It is a basic download manager. It only downloads the file, doesn't do BitTorrent,
extract zipped files or anything fancy.
*/
DownloadManager::DownloadManager(QWidget *parent)
: QDialog(parent)
, m_autoSaver(new AutoSaver(this))
, m_manager(BrowserApplication::networkAccessManager())
, m_iconProvider(0)
, m_removePolicy(Never)
{
setupUi(this);
downloadsView->setShowGrid(false);
downloadsView->verticalHeader()->hide();
downloadsView->horizontalHeader()->hide();
downloadsView->setAlternatingRowColors(true);
downloadsView->horizontalHeader()->setStretchLastSection(true);
m_model = new DownloadModel(this);
downloadsView->setModel(m_model);
connect(cleanupButton, SIGNAL(clicked()), this, SLOT(cleanup()));
load();
}
DownloadManager::~DownloadManager()
{
m_autoSaver->changeOccurred();
m_autoSaver->saveIfNeccessary();
if (m_iconProvider)
delete m_iconProvider;
}
int DownloadManager::activeDownloads() const
{
int count = 0;
for (int i = 0; i < m_downloads.count(); ++i) {
if (m_downloads.at(i)->stopButton->isEnabled())
++count;
}
return count;
}
void DownloadManager::download(const QNetworkRequest &request, bool requestFileName)
{
if (request.url().isEmpty())
return;
handleUnsupportedContent(m_manager->get(request), requestFileName);
}
void DownloadManager::handleUnsupportedContent(QNetworkReply *reply, bool requestFileName)
{
if (!reply || reply->url().isEmpty())
return;
QVariant header = reply->header(QNetworkRequest::ContentLengthHeader);
bool ok;
int size = header.toInt(&ok);
if (ok && size == 0)
return;
qDebug() << "DownloadManager::handleUnsupportedContent" << reply->url() << "requestFileName" << requestFileName;
DownloadItem *item = new DownloadItem(reply, requestFileName, this);
addItem(item);
}
void DownloadManager::addItem(DownloadItem *item)
{
connect(item, SIGNAL(statusChanged()), this, SLOT(updateRow()));
int row = m_downloads.count();
m_model->beginInsertRows(QModelIndex(), row, row);
m_downloads.append(item);
m_model->endInsertRows();
updateItemCount();
if (row == 0)
show();
downloadsView->setIndexWidget(m_model->index(row, 0), item);
QIcon icon = style()->standardIcon(QStyle::SP_FileIcon);
item->fileIcon->setPixmap(icon.pixmap(48, 48));
downloadsView->setRowHeight(row, item->sizeHint().height());
}
void DownloadManager::updateRow()
{
DownloadItem *item = qobject_cast<DownloadItem*>(sender());
int row = m_downloads.indexOf(item);
if (-1 == row)
return;
if (!m_iconProvider)
m_iconProvider = new QFileIconProvider();
QIcon icon = m_iconProvider->icon(item->m_output.fileName());
if (icon.isNull())
icon = style()->standardIcon(QStyle::SP_FileIcon);
item->fileIcon->setPixmap(icon.pixmap(48, 48));
downloadsView->setRowHeight(row, item->minimumSizeHint().height());
bool remove = false;
QWebSettings *globalSettings = QWebSettings::globalSettings();
if (!item->downloading()
&& globalSettings->testAttribute(QWebSettings::PrivateBrowsingEnabled))
remove = true;
if (item->downloadedSuccessfully()
&& removePolicy() == DownloadManager::SuccessFullDownload) {
remove = true;
}
if (remove)
m_model->removeRow(row);
cleanupButton->setEnabled(m_downloads.count() - activeDownloads() > 0);
}
DownloadManager::RemovePolicy DownloadManager::removePolicy() const
{
return m_removePolicy;
}
void DownloadManager::setRemovePolicy(RemovePolicy policy)
{
if (policy == m_removePolicy)
return;
m_removePolicy = policy;
m_autoSaver->changeOccurred();
}
void DownloadManager::save() const
{
QSettings settings;
settings.beginGroup(QLatin1String("downloadmanager"));
QMetaEnum removePolicyEnum = staticMetaObject.enumerator(staticMetaObject.indexOfEnumerator("RemovePolicy"));
settings.setValue(QLatin1String("removeDownloadsPolicy"), QLatin1String(removePolicyEnum.valueToKey(m_removePolicy)));
settings.setValue(QLatin1String("size"), size());
if (m_removePolicy == Exit)
return;
for (int i = 0; i < m_downloads.count(); ++i) {
QString key = QString(QLatin1String("download_%1_")).arg(i);
settings.setValue(key + QLatin1String("url"), m_downloads[i]->m_url);
settings.setValue(key + QLatin1String("location"), QFileInfo(m_downloads[i]->m_output).filePath());
settings.setValue(key + QLatin1String("done"), m_downloads[i]->downloadedSuccessfully());
}
int i = m_downloads.count();
QString key = QString(QLatin1String("download_%1_")).arg(i);
while (settings.contains(key + QLatin1String("url"))) {
settings.remove(key + QLatin1String("url"));
settings.remove(key + QLatin1String("location"));
settings.remove(key + QLatin1String("done"));
key = QString(QLatin1String("download_%1_")).arg(++i);
}
}
void DownloadManager::load()
{
QSettings settings;
settings.beginGroup(QLatin1String("downloadmanager"));
QSize size = settings.value(QLatin1String("size")).toSize();
if (size.isValid())
resize(size);
QByteArray value = settings.value(QLatin1String("removeDownloadsPolicy"), QLatin1String("Never")).toByteArray();
QMetaEnum removePolicyEnum = staticMetaObject.enumerator(staticMetaObject.indexOfEnumerator("RemovePolicy"));
m_removePolicy = removePolicyEnum.keyToValue(value) == -1 ?
Never :
static_cast<RemovePolicy>(removePolicyEnum.keyToValue(value));
int i = 0;
QString key = QString(QLatin1String("download_%1_")).arg(i);
while (settings.contains(key + QLatin1String("url"))) {
QUrl url = settings.value(key + QLatin1String("url")).toUrl();
QString fileName = settings.value(key + QLatin1String("location")).toString();
bool done = settings.value(key + QLatin1String("done"), true).toBool();
if (!url.isEmpty() && !fileName.isEmpty()) {
DownloadItem *item = new DownloadItem(0, this);
item->m_output.setFileName(fileName);
item->fileNameLabel->setText(QFileInfo(item->m_output.fileName()).fileName());
item->m_url = url;
item->stopButton->setVisible(false);
item->stopButton->setEnabled(false);
item->tryAgainButton->setVisible(!done);
item->tryAgainButton->setEnabled(!done);
item->progressBar->setVisible(!done);
addItem(item);
}
key = QString(QLatin1String("download_%1_")).arg(++i);
}
cleanupButton->setEnabled(m_downloads.count() - activeDownloads() > 0);
}
void DownloadManager::cleanup()
{
if (m_downloads.isEmpty())
return;
m_model->removeRows(0, m_downloads.count());
updateItemCount();
if (m_downloads.isEmpty() && m_iconProvider) {
delete m_iconProvider;
m_iconProvider = 0;
}
m_autoSaver->changeOccurred();
}
void DownloadManager::updateItemCount()
{
int count = m_downloads.count();
itemCount->setText(count == 1 ? tr("1 Download") : tr("%1 Downloads").arg(count));
}
DownloadModel::DownloadModel(DownloadManager *downloadManager, QObject *parent)
: QAbstractListModel(parent)
, m_downloadManager(downloadManager)
{
}
QVariant DownloadModel::data(const QModelIndex &index, int role) const
{
if (index.row() < 0 || index.row() >= rowCount(index.parent()))
return QVariant();
if (role == Qt::ToolTipRole)
if (!m_downloadManager->m_downloads.at(index.row())->downloadedSuccessfully())
return m_downloadManager->m_downloads.at(index.row())->downloadInfoLabel->text();
return QVariant();
}
int DownloadModel::rowCount(const QModelIndex &parent) const
{
return (parent.isValid()) ? 0 : m_downloadManager->m_downloads.count();
}
bool DownloadModel::removeRows(int row, int count, const QModelIndex &parent)
{
if (parent.isValid())
return false;
int lastRow = row + count - 1;
for (int i = lastRow; i >= row; --i) {
if (m_downloadManager->m_downloads.at(i)->downloadedSuccessfully()
|| m_downloadManager->m_downloads.at(i)->tryAgainButton->isEnabled()) {
beginRemoveRows(parent, i, i);
m_downloadManager->m_downloads.takeAt(i)->deleteLater();
endRemoveRows();
}
}
m_downloadManager->m_autoSaver->changeOccurred();
return true;
}
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