mirror of
https://github.com/debauchee/barrier.git
synced 2026-05-07 22:23:12 +08:00
checkpoint. adding screen saver support. only on X so far
and untested. also some known problems: not detecting an xscreensaver started after us and not detecting built-in screen saver activation (not sure if we can without using ugly extensions).
This commit is contained in:
crs
255
platform/CXWindowsScreenSaver.cpp
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255
platform/CXWindowsScreenSaver.cpp
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#include "CXWindowsScreenSaver.h"
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#include "CXWindowsUtil.h"
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#include <X11/Xatom.h>
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//
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// CXWindowsScreenSaver
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//
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CXWindowsScreenSaver::CXWindowsScreenSaver(Display* display) :
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m_display(display),
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m_notify(None),
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m_xscreensaver(None)
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{
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// get atoms
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m_atomScreenSaver = XInternAtom(m_display,
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"SCREENSAVER", False);
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m_atomScreenSaverVersion = XInternAtom(m_display,
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"_SCREENSAVER_VERSION", False);
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m_atomScreenSaverActivate = XInternAtom(m_display,
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"ACTIVATE", False);
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m_atomScreenSaverDeactivate = XInternAtom(m_display,
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"DEACTIVATE", False);
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// watch top-level windows for changes
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{
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bool error = false;
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CXWindowsUtil::CErrorLock lock(&error);
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Window root = DefaultRootWindow(m_display);
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XWindowAttributes attr;
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XGetWindowAttributes(m_display, root, &attr);
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m_rootEventMask = attr.your_event_mask;
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XSelectInput(m_display, root, m_rootEventMask | SubstructureNotifyMask);
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if (error) {
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m_rootEventMask = 0;
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}
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}
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// get the xscreensaver window, if any
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updateXScreenSaver();
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// get the built-in settings
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XGetScreenSaver(m_display, &m_timeout, &m_interval,
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&m_preferBlanking, &m_allowExposures);
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}
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CXWindowsScreenSaver::~CXWindowsScreenSaver()
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{
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// stop watching root for events
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CXWindowsUtil::CErrorLock lock;
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Window root = DefaultRootWindow(m_display);
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XSelectInput(m_display, root, m_rootEventMask);
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}
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bool
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CXWindowsScreenSaver::processEvent(XEvent* xevent)
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{
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switch (xevent->type) {
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case DestroyNotify:
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if (xevent->xdestroywindow.window == m_xscreensaver) {
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// xscreensaver is gone
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setXScreenSaver(false);
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m_xscreensaver = None;
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return true;
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}
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break;
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case MapNotify:
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if (xevent->xmap.window == m_xscreensaver) {
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// xscreensaver has activated
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setXScreenSaver(true);
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return true;
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}
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break;
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case UnmapNotify:
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if (xevent->xunmap.window == m_xscreensaver) {
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// xscreensaver has deactivated
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setXScreenSaver(false);
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return true;
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}
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break;
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}
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return false;
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}
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void
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CXWindowsScreenSaver::setNotify(Window notify)
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{
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m_notify = notify;
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}
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void
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CXWindowsScreenSaver::enable()
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{
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// try xscreensaver
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updateXScreenSaver();
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if (m_xscreensaver) {
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// FIXME
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return;
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}
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// use built-in X screen saver
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XSetScreenSaver(m_display, m_timeout, m_interval,
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m_preferBlanking, m_allowExposures);
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}
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void
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CXWindowsScreenSaver::disable()
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{
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// try xscreensaver
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updateXScreenSaver();
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if (m_xscreensaver) {
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// FIXME
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return;
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}
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// use built-in X screen saver
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XGetScreenSaver(m_display, &m_timeout, &m_interval,
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&m_preferBlanking, &m_allowExposures);
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XSetScreenSaver(m_display, 0, m_interval,
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m_preferBlanking, m_allowExposures);
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// FIXME -- now deactivate?
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}
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void
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CXWindowsScreenSaver::activate()
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{
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// try xscreensaver
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updateXScreenSaver();
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if (m_xscreensaver) {
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sendXScreenSaverCommand(m_atomScreenSaverActivate);
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return;
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}
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// use built-in X screen saver
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XForceScreenSaver(m_display, ScreenSaverActive);
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}
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void
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CXWindowsScreenSaver::deactivate()
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{
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// try xscreensaver
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updateXScreenSaver();
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if (m_xscreensaver) {
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sendXScreenSaverCommand(m_atomScreenSaverDeactivate);
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return;
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}
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// use built-in X screen saver
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XForceScreenSaver(m_display, ScreenSaverReset);
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}
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bool
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CXWindowsScreenSaver::isActive() const
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{
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// check xscreensaver
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if (m_xscreensaver != None) {
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return m_xscreensaverActive;
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}
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// can't check built-in X screen saver activity
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return false;
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}
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void
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CXWindowsScreenSaver::sendNotify(bool activated)
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{
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if (m_notify != None) {
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XEvent event;
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event.xclient.type = ClientMessage;
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event.xclient.display = m_display;
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event.xclient.window = m_notify;
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event.xclient.message_type = m_atomScreenSaver;
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event.xclient.format = 32;
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event.xclient.data.l[0] = activated ? 1 : 0;
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event.xclient.data.l[1] = 0;
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event.xclient.data.l[2] = 0;
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event.xclient.data.l[3] = 0;
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event.xclient.data.l[4] = 0;
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CXWindowsUtil::CErrorLock lock;
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XSendEvent(m_display, m_notify, False, 0, &event);
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}
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}
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void
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CXWindowsScreenSaver::setXScreenSaver(bool activated)
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{
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if (m_xscreensaverActive != activated) {
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m_xscreensaverActive = activated;
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sendNotify(activated);
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}
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}
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void
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CXWindowsScreenSaver::updateXScreenSaver()
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{
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// do nothing if we've already got the xscreensaver window
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if (m_xscreensaver != None) {
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return;
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}
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// find top-level window with m_atomScreenSaverVersion string property
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CXWindowsUtil::CErrorLock lock;
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Window root = DefaultRootWindow(m_display);
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Window rw, pw, *cw;
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unsigned int nc;
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if (XQueryTree(m_display, root, &rw, &pw, &cw, &nc)) {
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CString data;
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Atom type;
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for (unsigned int i = 0; i < nc; ++i) {
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if (CXWindowsUtil::getWindowProperty(m_display, cw[i],
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m_atomScreenSaverVersion,
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&data, &type, NULL, False) &&
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type == XA_STRING) {
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m_xscreensaver = cw[i];
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break;
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}
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}
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XFree(cw);
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}
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// see if xscreensaver is active
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if (m_xscreensaver != None) {
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bool error = false;
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CXWindowsUtil::CErrorLock lock(&error);
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XWindowAttributes attr;
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XGetWindowAttributes(m_display, m_xscreensaver, &attr);
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setXScreenSaver(!error && attr.map_state != IsUnmapped);
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}
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else {
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setXScreenSaver(false);
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}
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}
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void
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CXWindowsScreenSaver::sendXScreenSaverCommand(
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Atom cmd, long arg1, long arg2) const
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{
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XEvent event;
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event.xclient.type = ClientMessage;
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event.xclient.display = m_display;
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event.xclient.window = None;
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event.xclient.message_type = m_atomScreenSaver;
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event.xclient.format = 32;
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event.xclient.data.l[0] = static_cast<long>(cmd);
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event.xclient.data.l[1] = arg1;
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event.xclient.data.l[2] = arg2;
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event.xclient.data.l[3] = 0;
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event.xclient.data.l[4] = 0;
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CXWindowsUtil::CErrorLock lock;
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XSendEvent(m_display, m_xscreensaver, False, 0, &event);
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}
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