31e301174a
This fixes a bunch of possible crashy code when trying to run applications linking plasma-framework on platform Wayland. REVIEW: 115641
104 lines
3.6 KiB
C++
104 lines
3.6 KiB
C++
/*
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* Copyright 2011 Marco Martin <mart@kde.org>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU Library General Public License as
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* published by the Free Software Foundation; either version 2, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details
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*
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* You should have received a copy of the GNU Library General Public
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* License along with this program; if not, write to the
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* Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*/
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#include "effectwatcher_p.h"
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#include <QCoreApplication>
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#include <QtX11Extras/QX11Info>
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namespace Plasma
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{
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EffectWatcher::EffectWatcher(const QString& property, QObject *parent)
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: QObject(parent),
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m_property(XCB_ATOM_NONE),
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m_isX11(QX11Info::isPlatformX11())
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{
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init(property);
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}
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void EffectWatcher::init(const QString &property)
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{
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if (!m_isX11) {
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return;
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}
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QCoreApplication::instance()->installNativeEventFilter(this);
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xcb_connection_t *c = QX11Info::connection();
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const QByteArray propertyName = property.toLatin1();
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xcb_intern_atom_cookie_t atomCookie = xcb_intern_atom_unchecked(c, false, propertyName.length(), propertyName.constData());
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xcb_get_window_attributes_cookie_t winAttrCookie = xcb_get_window_attributes_unchecked(c, QX11Info::appRootWindow());
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QScopedPointer<xcb_intern_atom_reply_t, QScopedPointerPodDeleter> atom(xcb_intern_atom_reply(c, atomCookie, nullptr));
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if (!atom.isNull()) {
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m_property = atom->atom;
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}
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m_effectActive = isEffectActive();
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QScopedPointer<xcb_get_window_attributes_reply_t, QScopedPointerPodDeleter> attrs(xcb_get_window_attributes_reply(c, winAttrCookie, nullptr));
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if (!attrs.isNull()) {
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uint32_t events = attrs->your_event_mask | XCB_EVENT_MASK_PROPERTY_CHANGE;
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xcb_change_window_attributes(c, QX11Info::appRootWindow(), XCB_CW_EVENT_MASK, &events);
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}
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}
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bool EffectWatcher::nativeEventFilter(const QByteArray& eventType, void *message, long *result)
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{
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Q_UNUSED(result);
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if (eventType != "xcb_generic_event_t")
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return false;
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xcb_generic_event_t* event = reinterpret_cast<xcb_generic_event_t *>(message);
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uint response_type = event->response_type & ~0x80;
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if (response_type != XCB_PROPERTY_NOTIFY || m_property == XCB_ATOM_NONE)
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return false;
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xcb_property_notify_event_t* prop_event = reinterpret_cast<xcb_property_notify_event_t *>(event);
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if (prop_event->atom == m_property) {
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bool nowEffectActive = isEffectActive();
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if (m_effectActive != nowEffectActive) {
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m_effectActive = nowEffectActive;
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emit effectChanged(m_effectActive);
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}
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}
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return false;
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}
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bool EffectWatcher::isEffectActive() const
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{
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if (m_property == XCB_ATOM_NONE || !m_isX11) {
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return false;
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}
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xcb_connection_t *c = QX11Info::connection();
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xcb_list_properties_cookie_t propsCookie = xcb_list_properties_unchecked(c, QX11Info::appRootWindow());
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QScopedPointer<xcb_list_properties_reply_t, QScopedPointerPodDeleter> props(xcb_list_properties_reply(c, propsCookie, nullptr));
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if (props.isNull()) {
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return false;
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}
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xcb_atom_t *atoms = xcb_list_properties_atoms(props.data());
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for (int i = 0; i < props->atoms_len; ++i) {
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if (atoms[i] == m_property) {
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return true;
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}
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}
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return false;
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}
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} // namespace Plasma
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