Line data    Source code

       1             : /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
       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 "nsIdleServiceGTK.h"
      11             : #include "nsIServiceManager.h"
      12             : #include "nsDebug.h"
      13             : #include "prlink.h"
      14             : #include "mozilla/Logging.h"
      15             : 
      16             : using mozilla::LogLevel;
      17             : 
      18             : static mozilla::LazyLogModule sIdleLog("nsIIdleService");
      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             : 
      33          69 : NS_IMPL_ISUPPORTS_INHERITED0(nsIdleServiceGTK, nsIdleService)
      34             : 
      35           1 : static void Initialize()
      36             : {
      37           1 :     if (!GDK_IS_X11_DISPLAY(gdk_display_get_default()))
      38           0 :         return;
      39             : 
      40             :     // This will leak - See comments in ~nsIdleServiceGTK().
      41           1 :     PRLibrary* xsslib = PR_LoadLibrary("libXss.so.1");
      42           1 :     if (!xsslib) // ouch.
      43             :     {
      44           0 :         MOZ_LOG(sIdleLog, LogLevel::Warning, ("Failed to find libXss.so!\n"));
      45           0 :         return;
      46             :     }
      47             : 
      48           1 :     _XSSQueryExtension = (_XScreenSaverQueryExtension_fn)
      49           1 :         PR_FindFunctionSymbol(xsslib, "XScreenSaverQueryExtension");
      50           1 :     _XSSAllocInfo = (_XScreenSaverAllocInfo_fn)
      51           1 :         PR_FindFunctionSymbol(xsslib, "XScreenSaverAllocInfo");
      52           1 :     _XSSQueryInfo = (_XScreenSaverQueryInfo_fn)
      53           1 :         PR_FindFunctionSymbol(xsslib, "XScreenSaverQueryInfo");
      54             : 
      55           1 :     if (!_XSSQueryExtension)
      56           0 :         MOZ_LOG(sIdleLog, LogLevel::Warning, ("Failed to get XSSQueryExtension!\n"));
      57           1 :     if (!_XSSAllocInfo)
      58           0 :         MOZ_LOG(sIdleLog, LogLevel::Warning, ("Failed to get XSSAllocInfo!\n"));
      59           1 :     if (!_XSSQueryInfo)
      60           0 :         MOZ_LOG(sIdleLog, LogLevel::Warning, ("Failed to get XSSQueryInfo!\n"));
      61             : 
      62           1 :     sInitialized = true;
      63             : }
      64             : 
      65           1 : nsIdleServiceGTK::nsIdleServiceGTK()
      66           1 :     : mXssInfo(nullptr)
      67             : {
      68           1 :     Initialize();
      69           1 : }
      70             : 
      71           0 : nsIdleServiceGTK::~nsIdleServiceGTK()
      72             : {
      73           0 :     if (mXssInfo)
      74           0 :         XFree(mXssInfo);
      75             : 
      76             : // It is not safe to unload libXScrnSaver until each display is closed because
      77             : // the library registers callbacks through XESetCloseDisplay (Bug 397607).
      78             : // (Also the library and its functions are scoped for the file not the object.)
      79             : #if 0
      80             :     if (xsslib) {
      81             :         PR_UnloadLibrary(xsslib);
      82             :         xsslib = nullptr;
      83             :     }
      84             : #endif
      85           0 : }
      86             : 
      87             : bool
      88           0 : nsIdleServiceGTK::PollIdleTime(uint32_t *aIdleTime)
      89             : {
      90           0 :     if (!sInitialized) {
      91             :         // For some reason, we could not find xscreensaver.
      92           0 :         return false;
      93             :     }
      94             : 
      95             :     // Ask xscreensaver about idle time:
      96           0 :     *aIdleTime = 0;
      97             : 
      98             :     // We might not have a display (cf. in xpcshell)
      99           0 :     Display *dplay = GDK_DISPLAY_XDISPLAY(gdk_display_get_default());
     100           0 :     if (!dplay) {
     101           0 :         MOZ_LOG(sIdleLog, LogLevel::Warning, ("No display found!\n"));
     102           0 :         return false;
     103             :     }
     104             : 
     105           0 :     if (!_XSSQueryExtension || !_XSSAllocInfo || !_XSSQueryInfo) {
     106           0 :         return false;
     107             :     }
     108             : 
     109             :     int event_base, error_base;
     110           0 :     if (_XSSQueryExtension(dplay, &event_base, &error_base))
     111             :     {
     112           0 :         if (!mXssInfo)
     113           0 :             mXssInfo = _XSSAllocInfo();
     114           0 :         if (!mXssInfo)
     115           0 :             return false;
     116           0 :         _XSSQueryInfo(dplay, GDK_ROOT_WINDOW(), mXssInfo);
     117           0 :         *aIdleTime = mXssInfo->idle;
     118           0 :         return true;
     119             :     }
     120             :     // If we get here, we couldn't get to XScreenSaver:
     121           0 :     MOZ_LOG(sIdleLog, LogLevel::Warning, ("XSSQueryExtension returned false!\n"));
     122           0 :     return false;
     123             : }
     124             : 
     125             : bool
     126           0 : nsIdleServiceGTK::UsePollMode()
     127             : {
     128           0 :     return sInitialized;
     129             : }