1 /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
2 /* vim:expandtab:shiftwidth=4:tabstop=4:
3 */
4 /* This Source Code Form is subject to the terms of the Mozilla Public
5 * License, v. 2.0. If a copy of the MPL was not distributed with this
6 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
7
8 #include <gtk/gtk.h>
9
10 #include "nsUserIdleServiceGTK.h"
11 #include "nsDebug.h"
12 #include "prlink.h"
13 #include "mozilla/Logging.h"
14 #include "WidgetUtilsGtk.h"
15
16 using mozilla::LogLevel;
17
18 static mozilla::LazyLogModule sIdleLog("nsIUserIdleService");
19
20 typedef bool (*_XScreenSaverQueryExtension_fn)(Display* dpy, int* event_base,
21 int* error_base);
22
23 typedef XScreenSaverInfo* (*_XScreenSaverAllocInfo_fn)(void);
24
25 typedef void (*_XScreenSaverQueryInfo_fn)(Display* dpy, Drawable drw,
26 XScreenSaverInfo* info);
27
28 static bool sInitialized = false;
29 static _XScreenSaverQueryExtension_fn _XSSQueryExtension = nullptr;
30 static _XScreenSaverAllocInfo_fn _XSSAllocInfo = nullptr;
31 static _XScreenSaverQueryInfo_fn _XSSQueryInfo = nullptr;
32
Initialize()33 static void Initialize() {
34 if (!mozilla::widget::GdkIsX11Display()) {
35 return;
36 }
37
38 // This will leak - See comments in ~nsUserIdleServiceGTK().
39 PRLibrary* xsslib = PR_LoadLibrary("libXss.so.1");
40 if (!xsslib) // ouch.
41 {
42 MOZ_LOG(sIdleLog, LogLevel::Warning, ("Failed to find libXss.so!\n"));
43 return;
44 }
45
46 _XSSQueryExtension = (_XScreenSaverQueryExtension_fn)PR_FindFunctionSymbol(
47 xsslib, "XScreenSaverQueryExtension");
48 _XSSAllocInfo = (_XScreenSaverAllocInfo_fn)PR_FindFunctionSymbol(
49 xsslib, "XScreenSaverAllocInfo");
50 _XSSQueryInfo = (_XScreenSaverQueryInfo_fn)PR_FindFunctionSymbol(
51 xsslib, "XScreenSaverQueryInfo");
52
53 if (!_XSSQueryExtension)
54 MOZ_LOG(sIdleLog, LogLevel::Warning,
55 ("Failed to get XSSQueryExtension!\n"));
56 if (!_XSSAllocInfo)
57 MOZ_LOG(sIdleLog, LogLevel::Warning, ("Failed to get XSSAllocInfo!\n"));
58 if (!_XSSQueryInfo)
59 MOZ_LOG(sIdleLog, LogLevel::Warning, ("Failed to get XSSQueryInfo!\n"));
60
61 sInitialized = true;
62 }
63
nsUserIdleServiceGTK()64 nsUserIdleServiceGTK::nsUserIdleServiceGTK() : mXssInfo(nullptr) {
65 Initialize();
66 }
67
~nsUserIdleServiceGTK()68 nsUserIdleServiceGTK::~nsUserIdleServiceGTK() {
69 if (mXssInfo) XFree(mXssInfo);
70
71 // It is not safe to unload libXScrnSaver until each display is closed because
72 // the library registers callbacks through XESetCloseDisplay (Bug 397607).
73 // (Also the library and its functions are scoped for the file not the object.)
74 #if 0
75 if (xsslib) {
76 PR_UnloadLibrary(xsslib);
77 xsslib = nullptr;
78 }
79 #endif
80 }
81
PollIdleTime(uint32_t * aIdleTime)82 bool nsUserIdleServiceGTK::PollIdleTime(uint32_t* aIdleTime) {
83 if (!sInitialized) {
84 // For some reason, we could not find xscreensaver.
85 return false;
86 }
87
88 // Ask xscreensaver about idle time:
89 *aIdleTime = 0;
90
91 // We might not have a display (cf. in xpcshell)
92 Display* dplay = GDK_DISPLAY_XDISPLAY(gdk_display_get_default());
93 if (!dplay) {
94 MOZ_LOG(sIdleLog, LogLevel::Warning, ("No display found!\n"));
95 return false;
96 }
97
98 if (!_XSSQueryExtension || !_XSSAllocInfo || !_XSSQueryInfo) {
99 return false;
100 }
101
102 int event_base, error_base;
103 if (_XSSQueryExtension(dplay, &event_base, &error_base)) {
104 if (!mXssInfo) mXssInfo = _XSSAllocInfo();
105 if (!mXssInfo) return false;
106 _XSSQueryInfo(dplay, GDK_ROOT_WINDOW(), mXssInfo);
107 *aIdleTime = mXssInfo->idle;
108 return true;
109 }
110 // If we get here, we couldn't get to XScreenSaver:
111 MOZ_LOG(sIdleLog, LogLevel::Warning, ("XSSQueryExtension returned false!\n"));
112 return false;
113 }
114
UsePollMode()115 bool nsUserIdleServiceGTK::UsePollMode() { return sInitialized; }
116