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/*
SPDX-FileCopyrightText: 2009 Jan Lepper <krusader@users.sourceforge.net>
SPDX-FileCopyrightText: 2009-2022 Krusader Krew <https://krusader.org>
SPDX-License-Identifier: GPL-2.0-or-later
*/
#include "krpreviewjob.h"
#include "../FileSystem/fileitem.h"
#include "../defaults.h"
#include "PanelView/krview.h"
#include "PanelView/krviewitem.h"
#include "krpreviews.h"
#include <stdio.h>
// QtWidgets
#include <QWidget>
#define ASSERT(what) \
if (!(what)) \
abort();
// how much items to process by a single job
// view becomes unresponsive during load if set too high
#define MAX_CHUNK_SIZE 50
KrPreviewJob::KrPreviewJob(KrPreviews *parent)
: _job(nullptr)
, _parent(parent)
{
_timer.setSingleShot(true);
_timer.setInterval(0);
connect(&_timer, &QTimer::timeout, this, &KrPreviewJob::slotStartJob);
}
KrPreviewJob::~KrPreviewJob()
{
doKill();
}
void KrPreviewJob::scheduleItem(KrViewItem *item)
{
if (!_scheduled.contains(item)) {
_scheduled.append(item);
setTotalAmount(KJob::Files, totalAmount(KJob::Files) + 1);
}
if (!_job)
_timer.start();
}
void KrPreviewJob::removeItem(KrViewItem *item)
{
setTotalAmount(KJob::Files, totalAmount(KJob::Files) - _scheduled.removeAll(item));
if (_job) {
doKill();
if (!_scheduled.isEmpty())
_timer.start();
}
if (_scheduled.isEmpty())
emitResult();
}
void KrPreviewJob::slotFailed(const KFileItem &item)
{
slotGotPreview(item, QPixmap());
}
void KrPreviewJob::slotGotPreview(const KFileItem &item, const QPixmap &preview)
{
KrViewItem *vi = _hash[item];
ASSERT(vi);
_scheduled.removeOne(vi);
const FileItem *file = vi->getFileItem();
_parent->addPreview(file, preview);
vi->redraw();
setProcessedAmount(KJob::Files, processedAmount(KJob::Files) + 1);
emitPercent(processedAmount(KJob::Files), totalAmount(KJob::Files));
}
void KrPreviewJob::slotStartJob()
{
ASSERT(_job == nullptr);
ASSERT(!_scheduled.isEmpty());
_hash.clear();
sort();
int size = _parent->_view->fileIconSize();
KFileItemList list;
for (int i = 0; i < _scheduled.count() && i < MAX_CHUNK_SIZE; i++) {
KFileItem fi(_scheduled[i]->getFileItem()->getUrl(), nullptr, 0);
list.append(fi);
_hash.insert(fi, _scheduled[i]);
}
QStringList allPlugins = KIO::PreviewJob::availablePlugins();
_job = new KIO::PreviewJob(list, QSize(size, size), &allPlugins);
_job->setScaleType(KIO::PreviewJob::ScaledAndCached);
connect(_job, &KIO::PreviewJob::gotPreview, this, &KrPreviewJob::slotGotPreview);
connect(_job, &KIO::PreviewJob::failed, this, &KrPreviewJob::slotFailed);
connect(_job, &KIO::PreviewJob::result, this, &KrPreviewJob::slotJobResult);
}
void KrPreviewJob::slotJobResult(KJob *job)
{
(void)job;
if (!disconnect(_job, nullptr, this, nullptr))
abort();
_job = nullptr;
_hash.clear();
if (_scheduled.isEmpty())
emitResult();
else
_timer.start();
}
// move currently visible items to beginning of the list
void KrPreviewJob::sort()
{
for (int i = 0, visible_end = 0; i < _scheduled.count(); i++) {
KrViewItem *item = _scheduled[i];
if (_parent->_view->widget()->rect().intersects(item->itemRect())) {
if (i != visible_end)
_scheduled.move(i, visible_end);
visible_end++;
}
}
}
bool KrPreviewJob::doKill()
{
_timer.stop();
if (_job) {
if (!disconnect(_job, nullptr, this, nullptr))
abort();
if (!_job->kill())
abort();
_job = nullptr;
}
_hash.clear();
return true;
}
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