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/*
SPDX-FileCopyrightText: 2022 Volker Krause <vkrause@kde.org>
SPDX-License-Identifier: LGPL-2.0-or-later
*/
#include "kwindowstatesaver.h"
#include "ksharedconfig.h"
#include "kwindowconfig.h"
#include <QWindow>
class KWindowStateSaverPrivate
{
public:
QWindow *window = nullptr;
KConfigGroup configGroup;
std::function<QWindow *()> windowHandleCallback;
int timerId = 0;
void init(KWindowStateSaver *q);
void initWidget(QObject *widget, KWindowStateSaver *q);
};
void KWindowStateSaverPrivate::init(KWindowStateSaver *q)
{
if (!window) {
return;
}
KWindowConfig::restoreWindowSize(window, configGroup);
KWindowConfig::restoreWindowPosition(window, configGroup);
const auto deferredSave = [q, this]() {
if (!timerId) {
timerId = q->startTimer(250);
}
};
QObject::connect(window, &QWindow::widthChanged, q, deferredSave);
QObject::connect(window, &QWindow::heightChanged, q, deferredSave);
QObject::connect(window, &QWindow::xChanged, q, deferredSave);
QObject::connect(window, &QWindow::yChanged, q, deferredSave);
}
void KWindowStateSaverPrivate::initWidget(QObject *widget, KWindowStateSaver *q)
{
if (!window && windowHandleCallback) {
window = windowHandleCallback();
}
if (window) {
init(q);
} else {
widget->installEventFilter(q);
}
}
KWindowStateSaver::KWindowStateSaver(QWindow *window, const KConfigGroup &configGroup)
: QObject(window)
, d(new KWindowStateSaverPrivate)
{
Q_ASSERT(window);
d->window = window;
d->configGroup = configGroup;
d->init(this);
}
KWindowStateSaver::KWindowStateSaver(QWindow *window, const QString &configGroupName)
: QObject(window)
, d(new KWindowStateSaverPrivate)
{
Q_ASSERT(window);
d->window = window;
d->configGroup = KConfigGroup(KSharedConfig::openStateConfig(), configGroupName);
d->init(this);
}
KWindowStateSaver::KWindowStateSaver(QWindow *window, const char *configGroupName)
: QObject(window)
, d(new KWindowStateSaverPrivate)
{
Q_ASSERT(window);
d->window = window;
d->configGroup = KConfigGroup(KSharedConfig::openStateConfig(), configGroupName);
d->init(this);
}
KWindowStateSaver::~KWindowStateSaver()
{
delete d;
}
void KWindowStateSaver::timerEvent(QTimerEvent *event)
{
killTimer(event->timerId());
KWindowConfig::saveWindowPosition(d->window, d->configGroup);
KWindowConfig::saveWindowSize(d->window, d->configGroup);
d->timerId = 0;
}
bool KWindowStateSaver::eventFilter(QObject *watched, QEvent *event)
{
// QEvent::PlatformSurface would give us a valid window, but if there are
// intial resizings (explicitly or via layout constraints) those would then
// already overwrite our restored values. So wait until all that is done
// and only restore afterwards.
if (event->type() == QEvent::ShowToParent && !d->window) {
watched->removeEventFilter(this);
d->window = d->windowHandleCallback();
d->init(this);
}
return QObject::eventFilter(watched, event);
}
void KWindowStateSaver::initWidget(QObject *widget, const std::function<QWindow *()> &windowHandleCallback, const KConfigGroup &configGroup)
{
d = new KWindowStateSaverPrivate;
d->windowHandleCallback = windowHandleCallback;
d->configGroup = configGroup;
d->initWidget(widget, this);
}
void KWindowStateSaver::initWidget(QObject *widget, const std::function<QWindow *()> &windowHandleCallback, const QString &configGroupName)
{
d = new KWindowStateSaverPrivate;
d->windowHandleCallback = windowHandleCallback;
d->configGroup = KConfigGroup(KSharedConfig::openStateConfig(), configGroupName);
d->initWidget(widget, this);
}
void KWindowStateSaver::initWidget(QObject *widget, const std::function<QWindow *()> &windowHandleCallback, const char *configGroupName)
{
d = new KWindowStateSaverPrivate;
d->windowHandleCallback = windowHandleCallback;
d->configGroup = KConfigGroup(KSharedConfig::openStateConfig(), configGroupName);
d->initWidget(widget, this);
}
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