/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */ /* vim:expandtab:shiftwidth=4:tabstop=4: */ /* This Source Code Form is subject to the terms of the Mozilla Public * License, v. 2.0. If a copy of the MPL was not distributed with this * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ #include <gtk/gtk.h> #include "nsIdleServiceGTK.h" #include "nsIServiceManager.h" #include "nsDebug.h" #include "prlink.h" #include "mozilla/Logging.h" using mozilla::LogLevel; static PRLogModuleInfo* sIdleLog = nullptr; typedef bool (*_XScreenSaverQueryExtension_fn)(Display* dpy, int* event_base, int* error_base); typedef XScreenSaverInfo* (*_XScreenSaverAllocInfo_fn)(void); typedef void (*_XScreenSaverQueryInfo_fn)(Display* dpy, Drawable drw, XScreenSaverInfo *info); static bool sInitialized = false; static _XScreenSaverQueryExtension_fn _XSSQueryExtension = nullptr; static _XScreenSaverAllocInfo_fn _XSSAllocInfo = nullptr; static _XScreenSaverQueryInfo_fn _XSSQueryInfo = nullptr; NS_IMPL_ISUPPORTS_INHERITED0(nsIdleServiceGTK, nsIdleService) static void Initialize() { if (!GDK_IS_X11_DISPLAY(gdk_display_get_default())) return; // This will leak - See comments in ~nsIdleServiceGTK(). PRLibrary* xsslib = PR_LoadLibrary("libXss.so.1"); if (!xsslib) // ouch. { MOZ_LOG(sIdleLog, LogLevel::Warning, ("Failed to find libXss.so!\n")); return; } _XSSQueryExtension = (_XScreenSaverQueryExtension_fn) PR_FindFunctionSymbol(xsslib, "XScreenSaverQueryExtension"); _XSSAllocInfo = (_XScreenSaverAllocInfo_fn) PR_FindFunctionSymbol(xsslib, "XScreenSaverAllocInfo"); _XSSQueryInfo = (_XScreenSaverQueryInfo_fn) PR_FindFunctionSymbol(xsslib, "XScreenSaverQueryInfo"); if (!_XSSQueryExtension) MOZ_LOG(sIdleLog, LogLevel::Warning, ("Failed to get XSSQueryExtension!\n")); if (!_XSSAllocInfo) MOZ_LOG(sIdleLog, LogLevel::Warning, ("Failed to get XSSAllocInfo!\n")); if (!_XSSQueryInfo) MOZ_LOG(sIdleLog, LogLevel::Warning, ("Failed to get XSSQueryInfo!\n")); sInitialized = true; } nsIdleServiceGTK::nsIdleServiceGTK() : mXssInfo(nullptr) { if (!sIdleLog) sIdleLog = PR_NewLogModule("nsIIdleService"); Initialize(); } nsIdleServiceGTK::~nsIdleServiceGTK() { if (mXssInfo) XFree(mXssInfo); // It is not safe to unload libXScrnSaver until each display is closed because // the library registers callbacks through XESetCloseDisplay (Bug 397607). // (Also the library and its functions are scoped for the file not the object.) #if 0 if (xsslib) { PR_UnloadLibrary(xsslib); xsslib = nullptr; } #endif } bool nsIdleServiceGTK::PollIdleTime(uint32_t *aIdleTime) { if (!sInitialized) { // For some reason, we could not find xscreensaver. return false; } // Ask xscreensaver about idle time: *aIdleTime = 0; // We might not have a display (cf. in xpcshell) Display *dplay = GDK_DISPLAY_XDISPLAY(gdk_display_get_default()); if (!dplay) { MOZ_LOG(sIdleLog, LogLevel::Warning, ("No display found!\n")); return false; } if (!_XSSQueryExtension || !_XSSAllocInfo || !_XSSQueryInfo) { return false; } int event_base, error_base; if (_XSSQueryExtension(dplay, &event_base, &error_base)) { if (!mXssInfo) mXssInfo = _XSSAllocInfo(); if (!mXssInfo) return false; _XSSQueryInfo(dplay, GDK_ROOT_WINDOW(), mXssInfo); *aIdleTime = mXssInfo->idle; return true; } // If we get here, we couldn't get to XScreenSaver: MOZ_LOG(sIdleLog, LogLevel::Warning, ("XSSQueryExtension returned false!\n")); return false; } bool nsIdleServiceGTK::UsePollMode() { return sInitialized; }