Firefox扩展/插件 - 检测工作区锁定 [英] Firefox Extension/Addon - Detect workspace locked
问题描述
我在我的Firefox插件中寻找解决方案来检测用户工作区何时被锁定/释放。在谷歌浏览器有一个简单的API chrome.idle.onStateChanged.addListener 为它，有没有类似的Firefox或任何可能做到这一点，独立平台？
顺便说一句，我用的是插件sdk。
我已经试过这个空闲服务：
Cc [@ mozilla.org/widget/idleservice;1\"].getService(Ci.nsIIdleService）
但是我只是让我在进入睡眠状态时进入一些闲置超时或系统，而不是仅仅锁定工作区。
编辑：工作区锁定是指用户用 ctrl + alt + delete 锁定工作区。编辑2：我目前在Windows 8.1中工作，但是我猜是
chrome。闲置处理程序工作跨平台。
Edit3：我目前得到的答案是
1.那里不存在跨平台的解决方案，既不在铬也不在Firefox。
chrome.idle.onStateChanged似乎在windows，linux和osx上有所不同。只有Windows才能按预期处理锁定行为。我无法测试OSX，在Ubuntu 14它不适合我。
2.对于Firefox有一些深入的代码的东西，试图使它的工作 - 见Noitidart在这个答案主题。
Edit4：Noitidart已经找到了windows的解决方案 - github链接。
解决方案我不知道如何检测屏幕锁定，但有这些观察员通知：
https：/ /developer.mozilla.org/en-US/docs/Observer_Notifications#Idle_Service
计算机睡眠唤醒通知。生病问周围的锁屏这是一个有趣的一个。
一些有用的聊天主题，看看如何谷歌浏览器：
[12:33]好男人对实际工作有疑问。任何人都知道如何检测屏幕被锁定？显然谷歌浏览器有一个方法： https://developer.chrome.com/extensions/idle# event-onStateChanged
[12:45]有人知道MXR或DXR适用于Google Chrome的代码库吗？
$ b $ [12:46] mxr.mozilla.org/chromium
[12:52] Ms2ger：你能帮我看看他们如何测试屏幕锁定。即时通讯在这里看： http：/ /mxr.mozilla.org/chromium/source/src/chrome/browser/extensions/api/idle/idle_api_unittest.cc#84
[12： 56]哦，你看起来像他们投票： http://mxr.mozilla.org/chromium/source/src/chrome/browser/extensions/api/idle/idle_manager.h#118
也许他们没有投票。
检查：
244 void IdleManager :: UpdateIdleStateCallback（int idle_time）{
245 DCHECK（thread_checker_ .CalledOnValidThread（））;
246 bool locked = idle_time_provider _-> CheckIdleStateIsLocked（）;
247 int listener_count = 0;
导致： http://mxr.mozilla.org/chromium/source/src/chrome/browser/idle_win.cc#52
52 bool CheckIdleStateIsLocked（）{
53返回ui :: IsWorkstationLocked（）|| IsScreensaverRunning（）;
54
$ p
$ b这样我们就可以测试屏幕保护程序运行或工作站是否锁定 =http://mxr.mozilla.org/chromium/search?string=IsWorkstationLocked =nofollow> http://mxr.mozilla.org/chromium/search?string=IsWorkstationLocked
我们只看到一个实现（它很好奇，因为没有linux支持，但是在chrome docs页面上没有这么说，所以也许我找不到它） b
$ b
Windows
http://mxr.mozilla.org/chromium/source/src/ui/base/win/lock_state.cc#11
11 bool IsWorkstationLocked（）{
12 bool is_locked = true;
13 HDESK input_desk = :: OpenInputDesktop（0，0，GENERIC_READ）;
14 if（input_desk）{
15 wchar_t name [256] = {0};
16 DWORD needed = 0;
17 if（:: GetUserObjectInformation（
18 input_desk，UOI_NAME，name，sizeof（name）& needed））{
19 is_locked = lstrcmpi（name，Ldefault）！ = 0;
20}
21 :: CloseDesktop（input_desk）;
22}
23 return is_locked;
24
code
$ b $ li $ $ b
- 请参阅下面的屏幕保护程序部分，屏幕锁也通过此处理
http://mxr.mozilla.org/chromium/search?string=IsScreensaverRunning&find=&findi=&filter= ^％ 5B ^ \ 0％5D *％24& hitlimit =& tree = chromium
我们在此搜索结果中看到2 Mac和Windows看起来不支持linux，这很好奇，因为chrome.idle页面没有在文档中提到这个，也许我只是找不到它。
windows执行： http://mxr.mozilla.org/chromium/source/src/chrome/browser/idle_win.cc#39
39 bool IsScreensaverRunning（）{
40 DWORD result = 0;
41 if（:: SystemParametersInfo（SPI_GETSCREENSAVERRUNNING，0，& result，0））
42返回结果！= FALSE;
43返回false;
44}
45
mac执行： http://mxr.mozilla.org/chromium/source/src/chrome /browser/idle_mac.mm#28
28 - （id）init {
29 if（ （self = [super init]））{
30 NSDistributedNotificationCenter * distCenter =
31 [NSDistributedNotificationCenter defaultCenter];
32 [distCenter addObserver：self
33选择器：@selector（onScreenSaverStarted :)
34名称：@com.apple.screensaver.didstart
35 object：nil];
36 [distCenter addObserver：self
37选择器：@selector（onScreenSaverStopped）
38名称：@com.apple.screensaver.didstop
39 object：nil];
40 [distCenter addObserver：self
41选择器：@selector（onScreenLocked :)
42名称：@com.apple.screenIsLocked
43 object：nil];
44 [distCenter addObserver：self
45选择器：@selector（onScreenUnlocked :)
46名称：@com.apple.screenIsUnlocked
47 object：nil];
48}
49自我回报;
50
code $
$ / $> li>
所以总结一下：
[13:32]对于windows来说，它的蛋糕winapi已经打电话来测试屏幕是否锁定或scrensaver运行
[13:32]对于mac他们没有屏幕锁定测试。他们只是有屏幕保护程序测试，但它的观察员方法
[13:32]对于Linux他们没有屏幕锁定和屏幕保护程序测试。真奇怪。如果他知道哪个os支持chrome.idle，那么请问这个家伙是否在
编辑：其实我找到了linux的实现。返回搜索结果：
CheckIdleStateLocked： http://mxr.mozilla.org/chromium/search?string=CheckIdleStateIsLocked
24 bool CheckIdleStateIsLocked（）{
25 //通常屏幕保护程序是用来锁定屏幕，所以我们不需要
26 //检查工作站是否被锁定。
27 #if defined（OS_CHROMEOS）
28 return false;
29 #elif defined（USE_OZONE）
30 return false;
31 #else
32 return ScreensaverWindowFinder :: ScreensaverWindowExists（）;
33 #endif
34}
ScreensaverWindowExists我们发现： http://mxr.mozilla.org/chromium/source/src/chrome/browser/screensaver_window_finder_x11.cc15 bool ScreensaverWindowFinder :: ScreensaverWindowExists（）{
16 gfx :: X11ErrorTracker err_tracker;
17 ScreensaverWindowFinder finder;
18 ui :: EnumerateTopLevelWindows（&finder）;
19返回finder.exists_&& ！err_tracker.FoundNewError（）;
$ b $ li $EnumerateTopLevelWindowshttp：// mxr .mozilla.org / chromium / source / src / ui / base / x / x11_util.cc＃1059 ：
1059 void EnumerateTopLevelWindows（ui :: EnumerateWindowsDelegate * delegate）{
1060 std :: vector< XID>栈;
1061 if（！ui :: GetXWindowStack（ui :: GetX11RootWindow（），& stack））{
1062 // Window Manager不支持_NET_CLIENT_LIST_STACKING，所以退回
1063 / /到老式的所有X窗口列举。一些WMs父级'顶级'
1064 //窗口在未命名的实际顶级窗口（ion WM）中，因此将
1065 //搜索深度扩展到顶级窗口的所有子级。
1066 const int kMaxSearchDepth = 1;
1067 ui :: EnumerateAllWindows（delegate，kMaxSearchDepth）;
1068回报;
1069}
1070 XMenuList :: GetInstance（） - > InsertMenuWindowXIDs（& stack）;
1071
1072 std :: vector< XID> :: iterator iter; （iter = stack.begin（）; iter！= stack.end（）; iter ++）{
1074 if（delegate-&>; ShouldStopIterating（* iter））
1075 return ;
1076}
1077}
1078
我们他们称之为
委托 - > ShouldStopIterating，它与ScreensaverWindowExists： http://mxr.mozilla.org/chromium/source/src/chrome/browser/screensaver_window_finder_x11。 cc $
$ b $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $如果（！ui： ：IsWindowVisible（window）||！IsScreensaverWindow（window））
24 return false;
25 exists_ = true;
26返回true;
27}
需要询问 IsWindowVisible 和 IsScreensaverWindow
*在 ScreensaverWindowExists ： http://mxr.mozilla.org/chromium/source/src/chrome/browser/screensaver_window_finder_x11.cc
29 bool ScreensaverWindowFinder :: IsScreensaverWindow（XID窗口）const {
30 //它应该占据整个屏幕。
31 if（！ui :: IsX11WindowFullScreen（window））
32返回false;
33
34 //对于xscreensaver，窗口应具有_SCREENSAVER_VERSION属性。
35 if（ui :: PropertyExists（window，_SCREENSAVER_VERSION））
36 return true;
37
38 //对于所有其他的，如gnome-screensaver，窗口的WM_CLASS属性
39 //应该包含屏幕保护程序。
40 std :: string value;
41 if（！ui :: GetStringProperty（window，WM_CLASS，& value））
42返回false;
43
44返回value.find（screensaver）！= std :: string :: npos;
45
$ / code>
-
IsWindowVisible： http ：//mxr.mozilla.org/chromium/source/src/ui/base/x/x11_util.cc#546546 bool IsWindowVisible（XID窗口）{
547 TRACE_EVENT0（ui，IsWindowVisible）;
548
549 XWindowAttributes win_attributes;
550 if（！XGetWindowAttributes（gfx :: GetXDisplay（），window，& win_attributes））
551 return false;
552 if（win_attributes.map_state！= IsViewable）
553 return false;
554
555 //最小化窗口不可见。
556 std :: vector< XAtom> wm_states;
557 if（GetAtomArrayProperty（window，_NET_WM_STATE，& wm_states））{
558 XAtom hidden_atom = GetAtom（_ NET_WM_STATE_HIDDEN）;
559 if（std :: find（wm_states.begin（），wm_states.end（），hidden_atom）！=
560 wm_states.end（））{
561 return false;
562}
563}
I'm searching for a solution in my firefox addon to detect when the user workspace has locked/released. In google chrome there is an easy API chrome.idle.onStateChanged.addListener for it, is there something similar in firefox or any possibility to do that, platform independent?
By the way, I use the addon sdk.
I've already tried the idle service:
Cc["@mozilla.org/widget/idleservice;1"].getService(Ci.nsIIdleService)
but I just gives me access to some idle timeout or system when go to sleep and not to just workspace locked.
Edit: With "workspace locked" I mean the user lock the workspace with ctrl + alt + delete. I don't know how this exactly work on OSX or linux.
Edit2: I working in Windows 8.1 currently, but I guess the chrome.idle handler works cross platform.
Edit3: What i currently get out of current answers is
1. That there not exist a cross-platform solution, neither in chrome nor in firefox.
chrome.idle.onStateChanged seems to work different on windows, linux and osx. Only windows can handle that "locked" behaviour as expected. I can't test OSX, on ubuntu 14 it doesn't work for me.
2. For firefox there some in-depth code things to try to make it working - see answer bellow from Noitidart in this topic.
Edit4: Noitidart have found a solution for windows - github link.
I don't know how to detect screen lock but there are these observer notifications:
https://developer.mozilla.org/en-US/docs/Observer_Notifications#Idle_Service
Also the computer sleep wake notifications. ill ask around for lock screen thats an interesting one.
Some useful chat about the subject, looking at how google chrome does it:
[12:33] ok guys question about actual work. anyone know how to detect if screen was locked? apparently google chrome has a method: https://developer.chrome.com/extensions/idle#event-onStateChanged
[12:45] anyone know of a MXR or DXR for google chromes codebase?
[12:46] mxr.mozilla.org/chromium
[12:52] Ms2ger: can you help me find how they test screen lock. im looking here: http://mxr.mozilla.org/chromium/source/src/chrome/browser/extensions/api/idle/idle_api_unittest.cc#84
[12:56] oh yuck it looks like they poll: http://mxr.mozilla.org/chromium/source/src/chrome/browser/extensions/api/idle/idle_manager.h#118
maybe they arent polling.
check this out:
http://mxr.mozilla.org/chromium/source/src/chrome/browser/extensions/api/idle/idle_manager.cc#246
244 void IdleManager::UpdateIdleStateCallback(int idle_time) {
245 DCHECK(thread_checker_.CalledOnValidThread());
246 bool locked = idle_time_provider_->CheckIdleStateIsLocked();
247 int listener_count = 0;
leads to: http://mxr.mozilla.org/chromium/source/src/chrome/browser/idle_win.cc#52
52 bool CheckIdleStateIsLocked() {
53 return ui::IsWorkstationLocked() || IsScreensaverRunning();
54 }
so this leads us to test if screensaver running or workstation locked
leads to:
http://mxr.mozilla.org/chromium/search?string=IsWorkstationLocked
we see just one implementation (its curious because there is no linux support but it doesnt say so on the chrome docs page, so maybe i couldnt find it)
Windows
http://mxr.mozilla.org/chromium/source/src/ui/base/win/lock_state.cc#11
11 bool IsWorkstationLocked() { 12 bool is_locked = true; 13 HDESK input_desk = ::OpenInputDesktop(0, 0, GENERIC_READ); 14 if (input_desk) { 15 wchar_t name[256] = {0}; 16 DWORD needed = 0; 17 if (::GetUserObjectInformation( 18 input_desk, UOI_NAME, name, sizeof(name), &needed)) { 19 is_locked = lstrcmpi(name, L"default") != 0; 20 } 21 ::CloseDesktop(input_desk); 22 } 23 return is_locked; 24 }
- Mac
- see the screensaver section below, the screenlock is handled via there as well
http://mxr.mozilla.org/chromium/search?string=IsScreensaverRunning&find=&findi=&filter=^%5B^\0%5D*%24&hitlimit=&tree=chromium
we see in this search results 2 implementations, mac and windows it looks like no support for linux, which is curious because the chrome.idle page doesnt mention this on docs, maybe i just couldnt find it
windows implementation: http://mxr.mozilla.org/chromium/source/src/chrome/browser/idle_win.cc#39
39 bool IsScreensaverRunning() { 40 DWORD result = 0; 41 if (::SystemParametersInfo(SPI_GETSCREENSAVERRUNNING, 0, &result, 0)) 42 return result != FALSE; 43 return false; 44 } 45mac implementation: http://mxr.mozilla.org/chromium/source/src/chrome/browser/idle_mac.mm#28
28 - (id)init { 29 if ((self = [super init])) { 30 NSDistributedNotificationCenter* distCenter = 31 [NSDistributedNotificationCenter defaultCenter]; 32 [distCenter addObserver:self 33 selector:@selector(onScreenSaverStarted:) 34 name:@"com.apple.screensaver.didstart" 35 object:nil]; 36 [distCenter addObserver:self 37 selector:@selector(onScreenSaverStopped:) 38 name:@"com.apple.screensaver.didstop" 39 object:nil]; 40 [distCenter addObserver:self 41 selector:@selector(onScreenLocked:) 42 name:@"com.apple.screenIsLocked" 43 object:nil]; 44 [distCenter addObserver:self 45 selector:@selector(onScreenUnlocked:) 46 name:@"com.apple.screenIsUnlocked" 47 object:nil]; 48 } 49 return self; 50 }
so to sum this all up:
[13:32] for windows its peice of cake winapi has call to test if screen is locked or scrensaver running
[13:32] for mac they dont have screen lock test. they just have screensaver test, but its an observer method
[13:32] for linux they dont have screen lock nor screen saver test. real odd. ill ask the guy if he knows which os's they support chrome.idle in
edit: actually i found the linux implementation. back from the search results of: CheckIdleStateLocked: http://mxr.mozilla.org/chromium/search?string=CheckIdleStateIsLocked
http://mxr.mozilla.org/chromium/source/src/chrome/browser/idle_linux.cc#24
24 bool CheckIdleStateIsLocked() { 25 // Usually the screensaver is used to lock the screen, so we do not need to 26 // check if the workstation is locked. 27 #if defined(OS_CHROMEOS) 28 return false; 29 #elif defined(USE_OZONE) 30 return false; 31 #else 32 return ScreensaverWindowFinder::ScreensaverWindowExists(); 33 #endif 34 }Leads to ask how is
ScreensaverWindowExistswe find this: http://mxr.mozilla.org/chromium/source/src/chrome/browser/screensaver_window_finder_x11.cc15 bool ScreensaverWindowFinder::ScreensaverWindowExists() { 16 gfx::X11ErrorTracker err_tracker; 17 ScreensaverWindowFinder finder; 18 ui::EnumerateTopLevelWindows(&finder); 19 return finder.exists_ && !err_tracker.FoundNewError(); 20 }Leads to what is
EnumerateTopLevelWindowshttp://mxr.mozilla.org/chromium/source/src/ui/base/x/x11_util.cc#1059:1059 void EnumerateTopLevelWindows(ui::EnumerateWindowsDelegate* delegate) { 1060 std::vector<XID> stack; 1061 if (!ui::GetXWindowStack(ui::GetX11RootWindow(), &stack)) { 1062 // Window Manager doesn't support _NET_CLIENT_LIST_STACKING, so fall back 1063 // to old school enumeration of all X windows. Some WMs parent 'top-level' 1064 // windows in unnamed actual top-level windows (ion WM), so extend the 1065 // search depth to all children of top-level windows. 1066 const int kMaxSearchDepth = 1; 1067 ui::EnumerateAllWindows(delegate, kMaxSearchDepth); 1068 return; 1069 } 1070 XMenuList::GetInstance()->InsertMenuWindowXIDs(&stack); 1071 1072 std::vector<XID>::iterator iter; 1073 for (iter = stack.begin(); iter != stack.end(); iter++) { 1074 if (delegate->ShouldStopIterating(*iter)) 1075 return; 1076 } 1077 } 1078We say they call
delegate->ShouldStopIteratingwhich was seen in same file asScreensaverWindowExists: http://mxr.mozilla.org/chromium/source/src/chrome/browser/screensaver_window_finder_x11.cc22 bool ScreensaverWindowFinder::ShouldStopIterating(XID window) { 23 if (!ui::IsWindowVisible(window) || !IsScreensaverWindow(window)) 24 return false; 25 exists_ = true; 26 return true; 27 }Leads to ask what is
IsWindowVisibleandIsScreensaverWindow
*IsScreensaverWindow, in same file of ScreensaverWindowExists: http://mxr.mozilla.org/chromium/source/src/chrome/browser/screensaver_window_finder_x11.cc
29 bool ScreensaverWindowFinder::IsScreensaverWindow(XID window) const {
30 // It should occupy the full screen.
31 if (!ui::IsX11WindowFullScreen(window))
32 return false;
33
34 // For xscreensaver, the window should have _SCREENSAVER_VERSION property.
35 if (ui::PropertyExists(window, "_SCREENSAVER_VERSION"))
36 return true;
37
38 // For all others, like gnome-screensaver, the window's WM_CLASS property
39 // should contain "screensaver".
40 std::string value;
41 if (!ui::GetStringProperty(window, "WM_CLASS", &value))
42 return false;
43
44 return value.find("screensaver") != std::string::npos;
45 }
IsWindowVisible: http://mxr.mozilla.org/chromium/source/src/ui/base/x/x11_util.cc#546546 bool IsWindowVisible(XID window) { 547 TRACE_EVENT0("ui", "IsWindowVisible"); 548 549 XWindowAttributes win_attributes; 550 if (!XGetWindowAttributes(gfx::GetXDisplay(), window, &win_attributes)) 551 return false; 552 if (win_attributes.map_state != IsViewable) 553 return false; 554 555 // Minimized windows are not visible. 556 std::vector<XAtom> wm_states; 557 if (GetAtomArrayProperty(window, "_NET_WM_STATE", &wm_states)) { 558 XAtom hidden_atom = GetAtom("_NET_WM_STATE_HIDDEN"); 559 if (std::find(wm_states.begin(), wm_states.end(), hidden_atom) != 560 wm_states.end()) { 561 return false; 562 } 563 }
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