michael@0: /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
michael@0: /* vim:expandtab:shiftwidth=4:tabstop=4:
michael@0:  */
michael@0: /* This Source Code Form is subject to the terms of the Mozilla Public
michael@0:  * License, v. 2.0. If a copy of the MPL was not distributed with this
michael@0:  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
michael@0: 
michael@0: #ifdef MOZ_X11
michael@0: #include "mozilla/X11Util.h"
michael@0: #endif
michael@0: #include "nsIdleServiceQt.h"
michael@0: #include "nsIServiceManager.h"
michael@0: #include "nsDebug.h"
michael@0: #include "prlink.h"
michael@0: 
michael@0: #if defined(MOZ_X11)
michael@0: typedef bool (*_XScreenSaverQueryExtension_fn)(Display* dpy, int* event_base,
michael@0:                                                  int* error_base);
michael@0: 
michael@0: typedef XScreenSaverInfo* (*_XScreenSaverAllocInfo_fn)(void);
michael@0: 
michael@0: typedef void (*_XScreenSaverQueryInfo_fn)(Display* dpy, Drawable drw,
michael@0:                                           XScreenSaverInfo *info);
michael@0: 
michael@0: static _XScreenSaverQueryExtension_fn _XSSQueryExtension = nullptr;
michael@0: static _XScreenSaverAllocInfo_fn _XSSAllocInfo = nullptr;
michael@0: static _XScreenSaverQueryInfo_fn _XSSQueryInfo = nullptr;
michael@0: #endif
michael@0: 
michael@0: static bool sInitialized = false;
michael@0: 
michael@0: NS_IMPL_ISUPPORTS_INHERITED0(nsIdleServiceQt, nsIdleService)
michael@0: 
michael@0: nsIdleServiceQt::nsIdleServiceQt()
michael@0: #if defined(MOZ_X11)
michael@0:     : mXssInfo(nullptr)
michael@0: #endif
michael@0: {
michael@0: }
michael@0: 
michael@0: static void Initialize()
michael@0: {
michael@0:     sInitialized = true;
michael@0: 
michael@0: #if defined(MOZ_X11)
michael@0:     // This will leak - See comments in ~nsIdleServiceQt().
michael@0:     PRLibrary* xsslib = PR_LoadLibrary("libXss.so.1");
michael@0:     if (!xsslib) {
michael@0:         return;
michael@0:     }
michael@0: 
michael@0:     _XSSQueryExtension = (_XScreenSaverQueryExtension_fn)
michael@0:         PR_FindFunctionSymbol(xsslib, "XScreenSaverQueryExtension");
michael@0:     _XSSAllocInfo = (_XScreenSaverAllocInfo_fn)
michael@0:         PR_FindFunctionSymbol(xsslib, "XScreenSaverAllocInfo");
michael@0:     _XSSQueryInfo = (_XScreenSaverQueryInfo_fn)
michael@0:         PR_FindFunctionSymbol(xsslib, "XScreenSaverQueryInfo");
michael@0: #endif
michael@0: }
michael@0: 
michael@0: nsIdleServiceQt::~nsIdleServiceQt()
michael@0: {
michael@0: #if defined(MOZ_X11)
michael@0:     if (mXssInfo)
michael@0:         XFree(mXssInfo);
michael@0: 
michael@0: // It is not safe to unload libXScrnSaver until each display is closed because
michael@0: // the library registers callbacks through XESetCloseDisplay (Bug 397607).
michael@0: // (Also the library and its functions are scoped for the file not the object.)
michael@0: #if 0
michael@0:     if (xsslib) {
michael@0:         PR_UnloadLibrary(xsslib);
michael@0:         xsslib = nullptr;
michael@0:     }
michael@0: #endif
michael@0: #endif
michael@0: }
michael@0: 
michael@0: bool
michael@0: nsIdleServiceQt::PollIdleTime(uint32_t *aIdleTime)
michael@0: {
michael@0: #if defined(MOZ_X11)
michael@0:     // Ask xscreensaver about idle time:
michael@0:     *aIdleTime = 0;
michael@0: 
michael@0:     // We might not have a display (cf. in xpcshell)
michael@0:     Display *dplay = mozilla::DefaultXDisplay();
michael@0:     if (!dplay) {
michael@0:         return false;
michael@0:     }
michael@0: 
michael@0:     if (!sInitialized) {
michael@0:         Initialize();
michael@0:     }
michael@0:     if (!_XSSQueryExtension || !_XSSAllocInfo || !_XSSQueryInfo) {
michael@0:         return false;
michael@0:     }
michael@0: 
michael@0:     int event_base, error_base;
michael@0:     if (_XSSQueryExtension(dplay, &event_base, &error_base)) {
michael@0:         if (!mXssInfo)
michael@0:             mXssInfo = _XSSAllocInfo();
michael@0:         if (!mXssInfo)
michael@0:             return false;
michael@0: 
michael@0:         _XSSQueryInfo(dplay, RootWindowOfScreen(DefaultScreenOfDisplay(mozilla::DefaultXDisplay())), mXssInfo);
michael@0:         *aIdleTime = mXssInfo->idle;
michael@0:         return true;
michael@0:     }
michael@0: #endif
michael@0: 
michael@0:     return false;
michael@0: }
michael@0: 
michael@0: bool
michael@0: nsIdleServiceQt::UsePollMode()
michael@0: {
michael@0: #if defined(MOZ_X11)
michael@0:     return false;
michael@0: #endif
michael@0:     return true;
michael@0: }
michael@0: