forked from Qortal/Brooklyn
136 lines
4.0 KiB
C++
136 lines
4.0 KiB
C++
/*
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SPDX-FileCopyrightText: 2013 Alexander Mezin <mezin.alexander@gmail.com>
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SPDX-License-Identifier: GPL-2.0-or-later
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*/
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#include "xlibnotifications.h"
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#include <cstring>
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#include <X11/Xlib-xcb.h>
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#include <X11/extensions/XI.h>
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#include <X11/extensions/XI2proto.h>
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#include <X11/extensions/XInput2.h>
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XlibNotifications::XlibNotifications(Display *display, int device)
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: m_display(display)
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, m_device(device)
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{
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m_connection = XGetXCBConnection(display);
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m_notifier = new QSocketNotifier(xcb_get_file_descriptor(m_connection), QSocketNotifier::Read, this);
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xcb_query_extension_cookie_t inputExtCookie = xcb_query_extension(m_connection, std::strlen(INAME), INAME);
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QScopedPointer<xcb_query_extension_reply_t, QScopedPointerPodDeleter> inputExt(xcb_query_extension_reply(m_connection, inputExtCookie, nullptr));
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if (!inputExt) {
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return;
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}
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m_inputOpcode = inputExt->major_opcode;
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const xcb_setup_t *setup = xcb_get_setup(m_connection);
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xcb_screen_iterator_t iter = xcb_setup_roots_iterator(setup);
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xcb_screen_t *screen = iter.data;
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m_inputWindow = xcb_generate_id(m_connection);
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xcb_create_window(m_connection, 0, m_inputWindow, screen->root, 0, 0, 1, 1, 0, XCB_WINDOW_CLASS_INPUT_ONLY, 0, 0, nullptr);
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xcb_flush(m_connection);
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XIEventMask masks[2];
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unsigned char touchpadMask[] = {0, 0, 0, 0};
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masks[0].deviceid = device;
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masks[0].mask = touchpadMask;
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masks[0].mask_len = sizeof(touchpadMask);
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XISetMask(touchpadMask, XI_PropertyEvent);
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unsigned char allMask[] = {0, 0, 0, 0};
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masks[1].deviceid = XIAllDevices;
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masks[1].mask = allMask;
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masks[1].mask_len = sizeof(allMask);
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XISetMask(allMask, XI_HierarchyChanged);
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XISelectEvents(display, XDefaultRootWindow(display), masks, sizeof(masks) / sizeof(XIEventMask));
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XFlush(display);
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connect(m_notifier, SIGNAL(activated(int)), SLOT(processEvents()));
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m_notifier->setEnabled(true);
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}
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void XlibNotifications::processEvents()
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{
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while (XPending(m_display)) {
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XEvent event;
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XNextEvent(m_display, &event);
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processEvent(&event);
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}
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}
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struct XEventDataDeleter {
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XEventDataDeleter(Display *display, XGenericEventCookie *cookie)
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: m_display(display)
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, m_cookie(cookie)
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{
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XGetEventData(m_display, m_cookie);
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}
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~XEventDataDeleter()
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{
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if (m_cookie->data) {
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XFreeEventData(m_display, m_cookie);
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}
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}
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Display *m_display;
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XGenericEventCookie *m_cookie;
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};
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void XlibNotifications::processEvent(XEvent *event)
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{
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if (event->xcookie.type != GenericEvent) {
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return;
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}
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if (event->xcookie.extension != m_inputOpcode) {
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return;
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}
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if (event->xcookie.evtype == XI_PropertyEvent) {
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XEventDataDeleter helper(m_display, &event->xcookie);
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if (!event->xcookie.data) {
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return;
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}
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XIPropertyEvent *propEvent = reinterpret_cast<XIPropertyEvent *>(event->xcookie.data);
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Q_EMIT propertyChanged(propEvent->property);
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} else if (event->xcookie.evtype == XI_HierarchyChanged) {
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XEventDataDeleter helper(m_display, &event->xcookie);
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if (!event->xcookie.data) {
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return;
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}
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XIHierarchyEvent *hierarchyEvent = reinterpret_cast<XIHierarchyEvent *>(event->xcookie.data);
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for (uint16_t i = 0; i < hierarchyEvent->num_info; i++) {
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if (hierarchyEvent->info[i].deviceid == m_device) {
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if (hierarchyEvent->info[i].flags & XISlaveRemoved) {
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Q_EMIT touchpadDetached();
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return;
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}
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}
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if (hierarchyEvent->info[i].use != XISlavePointer) {
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continue;
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}
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if (hierarchyEvent->info[i].flags & (XIDeviceEnabled | XIDeviceDisabled)) {
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Q_EMIT devicePlugged(hierarchyEvent->info[i].deviceid);
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}
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}
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}
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}
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XlibNotifications::~XlibNotifications()
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{
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xcb_destroy_window(m_connection, m_inputWindow);
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xcb_flush(m_connection);
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}
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#include "moc_xlibnotifications.cpp"
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