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/*
SPDX-FileCopyrightText: 2017 David Edmundson <davidedmundson@kde.org>
SPDX-License-Identifier: LGPL-2.1-only OR LGPL-3.0-only OR LicenseRef-KDE-Accepted-LGPL
*/
#include "xwindowsystemeventbatcher.h"
#include <QDebug>
#include <QTimerEvent>
#include <KX11Extras>
#define BATCH_TIME 10
static const NET::Properties s_cachableProperties = NET::WMName | NET::WMVisibleName | NET::WMIcon;
static const NET::Properties2 s_cachableProperties2 = NET::WM2UserTime;
XWindowSystemEventBatcher::XWindowSystemEventBatcher(QObject *parent)
: QObject(parent)
{
connect(KX11Extras::self(), &KX11Extras::windowAdded, this, &XWindowSystemEventBatcher::windowAdded);
// remove our cache entries when we lose a window, otherwise we might fire change signals after a window is destroyed which wouldn't make sense
connect(KX11Extras::self(), &KX11Extras::windowRemoved, this, [this](WId wid) {
m_cache.remove(wid);
Q_EMIT windowRemoved(wid);
});
QObject::connect(KX11Extras::self(), &KX11Extras::windowChanged, this, [this](WId window, NET::Properties properties, NET::Properties2 properties2) {
// if properties contained only cachable flags
if ((properties | s_cachableProperties) == s_cachableProperties && (properties2 | s_cachableProperties2) == s_cachableProperties2) {
m_cache[window].properties |= properties;
m_cache[window].properties2 |= properties2;
if (!m_timerId) {
m_timerId = startTimer(BATCH_TIME);
}
} else {
// submit all caches along with any real updates
auto it = m_cache.constFind(window);
if (it != m_cache.constEnd()) {
properties |= it->properties;
properties2 |= it->properties2;
m_cache.erase(it);
}
Q_EMIT windowChanged(window, properties, properties2);
}
});
}
void XWindowSystemEventBatcher::timerEvent(QTimerEvent *event)
{
if (event->timerId() != m_timerId) {
return;
}
for (auto it = m_cache.constBegin(); it != m_cache.constEnd(); it++) {
Q_EMIT windowChanged(it.key(), it.value().properties, it.value().properties2);
};
m_cache.clear();
killTimer(m_timerId);
m_timerId = 0;
}
#include "moc_xwindowsystemeventbatcher.cpp"
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