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62 lines
2.4 KiB
62 lines
2.4 KiB
3 years ago
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/*
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SPDX-FileCopyrightText: 2017 David Edmundson <davidedmundson@kde.org>
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SPDX-License-Identifier: LGPL-2.1-only OR LGPL-3.0-only OR LicenseRef-KDE-Accepted-LGPL
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*/
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#include "xwindowsystemeventbatcher.h"
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#include <QDebug>
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#include <QTimerEvent>
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#define BATCH_TIME 10
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static const NET::Properties s_cachableProperties = NET::WMName | NET::WMVisibleName;
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static const NET::Properties2 s_cachableProperties2 = NET::WM2UserTime;
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XWindowSystemEventBatcher::XWindowSystemEventBatcher(QObject *parent)
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: QObject(parent)
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{
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connect(KWindowSystem::self(), &KWindowSystem::windowAdded, this, &XWindowSystemEventBatcher::windowAdded);
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// 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
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connect(KWindowSystem::self(), &KWindowSystem::windowRemoved, this, [this](WId wid) {
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m_cache.remove(wid);
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Q_EMIT windowRemoved(wid);
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});
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void (KWindowSystem::*myWindowChangeSignal)(WId window, NET::Properties properties, NET::Properties2 properties2) = &KWindowSystem::windowChanged;
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QObject::connect(KWindowSystem::self(), myWindowChangeSignal, this, [this](WId window, NET::Properties properties, NET::Properties2 properties2) {
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// if properties contained only cachable flags
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if ((properties | s_cachableProperties) == s_cachableProperties && (properties2 | s_cachableProperties2) == s_cachableProperties2) {
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m_cache[window].properties |= properties;
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m_cache[window].properties2 |= properties2;
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if (!m_timerId) {
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m_timerId = startTimer(BATCH_TIME);
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}
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} else {
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// submit all caches along with any real updates
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auto it = m_cache.constFind(window);
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if (it != m_cache.constEnd()) {
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properties |= it->properties;
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properties2 |= it->properties2;
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m_cache.erase(it);
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}
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Q_EMIT windowChanged(window, properties, properties2);
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}
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});
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}
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void XWindowSystemEventBatcher::timerEvent(QTimerEvent *event)
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{
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if (event->timerId() != m_timerId) {
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return;
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}
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for (auto it = m_cache.constBegin(); it != m_cache.constEnd(); it++) {
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Q_EMIT windowChanged(it.key(), it.value().properties, it.value().properties2);
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};
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m_cache.clear();
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killTimer(m_timerId);
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m_timerId = 0;
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}
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