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screensaver.go
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screensaver.go
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/*
* Copyright (C) 2014 ~ 2018 Deepin Technology Co., Ltd.
*
* Author: jouyouyun <jouyouwen717@gmail.com>
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
package screensaver
import (
"errors"
"strings"
"sync"
"github.com/godbus/dbus"
ofdbus "github.com/linuxdeepin/go-dbus-factory/org.freedesktop.dbus"
x "github.com/linuxdeepin/go-x11-client"
"github.com/linuxdeepin/go-x11-client/ext/dpms"
"github.com/linuxdeepin/go-x11-client/ext/screensaver"
"pkg.deepin.io/lib/dbusutil"
"pkg.deepin.io/lib/dbusutil/proxy"
"pkg.deepin.io/lib/log"
)
//go:generate dbusutil-gen em -type ScreenSaver
var logger = log.NewLogger("daemon/screensaver")
type inhibitor struct {
sender dbus.Sender
cookie uint32
name string
reason string
}
type ScreenSaver struct {
xConn *x.Conn
service *dbusutil.Service
sigLoop *dbusutil.SignalLoop
dbusDaemon *ofdbus.DBus
blank byte
idleTime uint32
idleInterval uint32
inhibitors map[uint32]inhibitor
counter uint32
mu sync.Mutex
//Inhibit state, we need save the SetTimeout value,
//so we can recover the correct state when enter UnInhibit state.
lastVals *timeoutVals
//nolint
signals *struct {
// Idle 定时器超时信号,当系统在给定时间内未被使用时发送
IdleOn struct{}
// Idle 超时时,如果设置了壁纸切换,则发送此信号
CycleActive struct{}
// Idle 超时后,如果系统被使用就发送此信号,重新开始 Idle 计时器
IdleOff struct{}
}
}
type timeoutVals struct {
seconds, interval uint32
blank bool
}
// 抑制 Idle 计时器,不再检测系统是否空闲,然后返回一个 id,用来取消此操作。
//
// name: 抑制 Idle 计时器的程序名称
//
// reason: 抑制原因
//
// cookie: 此次操作对应的 id,用来取消抑制
func (ss *ScreenSaver) Inhibit(sender dbus.Sender, name, reason string) (cookie uint32,
busErr *dbus.Error) {
ss.mu.Lock()
defer ss.mu.Unlock()
ss.counter++
ss.inhibitors[ss.counter] = inhibitor{
cookie: ss.counter,
name: name,
reason: reason,
sender: sender,
}
if len(ss.inhibitors) == 1 {
ss.setTimeout(0, 0, false)
}
logger.Infof("sender %s %q want system enter inhibit, because: %q",
sender, name, reason)
return ss.counter, nil
}
// 模拟用户操作,让系统处于使用状态,重新开始 Idle 定时器
func (ss *ScreenSaver) SimulateUserActivity() *dbus.Error {
err := x.ForceScreenSaverChecked(ss.xConn, x.ScreenSaverReset).Check(ss.xConn)
return dbusutil.ToError(err)
}
// 根据 id 取消对应的抑制操作
func (ss *ScreenSaver) UnInhibit(sender dbus.Sender, cookie uint32) *dbus.Error {
ss.mu.Lock()
defer ss.mu.Unlock()
inhibitor, ok := ss.inhibitors[cookie]
if !ok {
logger.Warning("invalid cookie", cookie)
return dbusutil.ToError(errors.New("invalid cookie"))
}
if inhibitor.sender != sender {
return dbusutil.ToError(errors.New("sender not match"))
}
logger.Infof("%q no need inhibit.", inhibitor.name)
ss.unInhibit(cookie)
return nil
}
func (ss *ScreenSaver) unInhibit(cookie uint32) {
delete(ss.inhibitors, cookie)
if len(ss.inhibitors) == 0 {
logger.Info("Enter un-inhibit state")
if ss.lastVals != nil {
logger.Info("recover from ", ss.lastVals)
ss.setTimeout(ss.lastVals.seconds, ss.lastVals.interval, ss.lastVals.blank)
ss.lastVals = nil
} else {
ss.setTimeout(ss.idleTime, ss.idleInterval, ss.blank == 1)
}
}
}
// 设置 Idle 的定时器超时时间
//
// seconds: 超时时间,以秒为单位
//
// interval: 屏保模式下,背景更换的间隔时间
//
// blank: 是否黑屏,此参数暂时无效
func (ss *ScreenSaver) SetTimeout(seconds, interval uint32, blank bool) *dbus.Error {
ss.mu.Lock()
defer ss.mu.Unlock()
if len(ss.inhibitors) > 0 {
ss.lastVals = &timeoutVals{seconds, interval, blank}
logger.Info("Current is inhibit state, the value", ss.lastVals, "will apply when in unhibit state")
} else {
ss.setTimeout(seconds, interval, blank)
ss.idleTime = seconds
ss.idleInterval = interval
if blank {
ss.blank = 1
} else {
ss.blank = 0
}
}
return nil
}
func (ss *ScreenSaver) setTimeout(seconds, interval uint32, blank bool) {
if blank {
ss.blank = x.BlankingPreferred
} else {
ss.blank = x.BlankingNotPreferred
}
err := x.SetScreenSaverChecked(ss.xConn, int16(seconds), int16(interval), ss.blank,
x.ExposuresNotAllowed).Check(ss.xConn)
if err != nil {
logger.Warning(err)
}
err = dpms.SetTimeoutsChecked(ss.xConn, 0, 0,
0).Check(ss.xConn)
if err != nil {
logger.Warning(err)
}
logger.Info("SetTimeout to ", seconds, interval, blank)
}
const (
dbusServiceName = "org.freedesktop.ScreenSaver"
dbusPath = "/org/freedesktop/ScreenSaver"
dbusInterface = dbusServiceName
)
func (*ScreenSaver) GetInterfaceName() string {
return dbusInterface
}
func (ss *ScreenSaver) destroy() {
ss.sigLoop.Stop()
ss.dbusDaemon.RemoveHandler(proxy.RemoveAllHandlers)
}
func newScreenSaver(service *dbusutil.Service) (*ScreenSaver, error) {
s := &ScreenSaver{
service: service,
inhibitors: make(map[uint32]inhibitor),
}
sessionBus := service.Conn()
s.dbusDaemon = ofdbus.NewDBus(sessionBus)
s.sigLoop = dbusutil.NewSignalLoop(sessionBus, 10)
var err error
s.xConn, err = x.NewConn()
if err != nil {
return nil, err
}
// query screensaver ext version
ssVersion, err := screensaver.QueryVersion(s.xConn, screensaver.MajorVersion, screensaver.MinorVersion).Reply(s.xConn)
if err != nil {
logger.Warning("failed to get screensaver ext version:", err)
} else {
logger.Debugf("screensaver ext version %d.%d", ssVersion.ServerMajorVersion,
ssVersion.ServerMinorVersion)
root := s.xConn.GetDefaultScreen().Root
err = screensaver.SelectInputChecked(s.xConn, x.Drawable(root), screensaver.EventNotifyMask|
screensaver.EventCycleMask).Check(s.xConn)
if err != nil {
logger.Warning(err)
}
go s.loop()
}
// query dpms ext version
dpmsVersion, err := dpms.GetVersion(s.xConn, 1, 1).Reply(s.xConn)
if err != nil {
logger.Warning("failed to get dpms ext version:", err)
} else {
logger.Debugf("dpms ext version %d.%d", dpmsVersion.ServerMajorVersion,
dpmsVersion.ServerMinorVersion)
}
s.listenDBusNameOwnerChanged()
s.sigLoop.Start()
return s, nil
}
func (ss *ScreenSaver) listenDBusNameOwnerChanged() {
ss.dbusDaemon.InitSignalExt(ss.sigLoop, true)
_, err := ss.dbusDaemon.ConnectNameOwnerChanged(func(name string, oldOwner string, newOwner string) {
if strings.HasPrefix(name, ":") &&
name == oldOwner && newOwner == "" {
ss.mu.Lock()
for cookie, inhibitor := range ss.inhibitors {
if string(inhibitor.sender) == name {
logger.Infof("app %s %q disconnect from DBus",
name, inhibitor.name)
ss.unInhibit(cookie)
break
}
}
ss.mu.Unlock()
}
})
if err != nil {
logger.Warning(err)
}
}
func (ss *ScreenSaver) loop() {
ssExtData := ss.xConn.GetExtensionData(screensaver.Ext())
eventChan := make(chan x.GenericEvent, 10)
ss.xConn.AddEventChan(eventChan)
for ev := range eventChan {
switch ev.GetEventCode() {
case screensaver.NotifyEventCode + ssExtData.FirstEvent:
event, _ := screensaver.NewNotifyEvent(ev)
s := ss.service
var err error
switch event.State {
case screensaver.StateCycle:
err = s.Emit(ss, "CycleActive")
case screensaver.StateOn:
err = s.Emit(ss, "IdleOn")
case screensaver.StateOff:
err = s.Emit(ss, "IdleOff")
}
if err != nil {
logger.Warning(err)
}
}
}
}