pjs/widget/qt/nsIdleServiceQt.cpp

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/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
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/* ***** BEGIN LICENSE BLOCK *****
* Version: MPL 1.1/GPL 2.0/LGPL 2.1
*
* The contents of this file are subject to the Mozilla Public License Version
* 1.1 (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
* http://www.mozilla.org/MPL/
*
* Software distributed under the License is distributed on an "AS IS" basis,
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* for the specific language governing rights and limitations under the
* License.
*
* The Original Code is mozilla.org code.
*
* The Initial Developer of the Original Code is
* Gijs Kruitbosch <gijskruitbosch@gmail.com>.
* Portions created by the Initial Developer are Copyright (C) 2007
* the Initial Developer. All Rights Reserved.
*
* Contributor(s):
*
* Alternatively, the contents of this file may be used under the terms of
* either the GNU General Public License Version 2 or later (the "GPL"), or
* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
* in which case the provisions of the GPL or the LGPL are applicable instead
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#ifdef MOZ_X11
#include "mozilla/X11Util.h"
#endif
#include "nsIdleServiceQt.h"
#include "nsIServiceManager.h"
#include "nsDebug.h"
#include "prlink.h"
#if !defined(MOZ_PLATFORM_MAEMO) && defined(MOZ_X11)
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 _XScreenSaverQueryExtension_fn _XSSQueryExtension = nsnull;
static _XScreenSaverAllocInfo_fn _XSSAllocInfo = nsnull;
static _XScreenSaverQueryInfo_fn _XSSQueryInfo = nsnull;
#endif
static bool sInitialized = false;
NS_IMPL_ISUPPORTS2(nsIdleServiceQt, nsIIdleService, nsIdleService)
nsIdleServiceQt::nsIdleServiceQt()
#if !defined(MOZ_PLATFORM_MAEMO) && defined(MOZ_X11)
: mXssInfo(nsnull)
#endif
{
}
static void Initialize()
{
sInitialized = true;
#if !defined(MOZ_PLATFORM_MAEMO) && defined(MOZ_X11)
// This will leak - See comments in ~nsIdleServiceQt().
PRLibrary* xsslib = PR_LoadLibrary("libXss.so.1");
if (!xsslib) {
return;
}
_XSSQueryExtension = (_XScreenSaverQueryExtension_fn)
PR_FindFunctionSymbol(xsslib, "XScreenSaverQueryExtension");
_XSSAllocInfo = (_XScreenSaverAllocInfo_fn)
PR_FindFunctionSymbol(xsslib, "XScreenSaverAllocInfo");
_XSSQueryInfo = (_XScreenSaverQueryInfo_fn)
PR_FindFunctionSymbol(xsslib, "XScreenSaverQueryInfo");
#endif
}
nsIdleServiceQt::~nsIdleServiceQt()
{
#if !defined(MOZ_PLATFORM_MAEMO) && defined(MOZ_X11)
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 = nsnull;
}
#endif
#endif
}
bool
nsIdleServiceQt::PollIdleTime(PRUint32 *aIdleTime)
{
#if !defined(MOZ_PLATFORM_MAEMO) && defined(MOZ_X11)
// Ask xscreensaver about idle time:
*aIdleTime = 0;
// We might not have a display (cf. in xpcshell)
Display *dplay = mozilla::DefaultXDisplay();
if (!dplay) {
return false;
}
if (!sInitialized) {
Initialize();
}
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, RootWindowOfScreen(DefaultScreenOfDisplay(mozilla::DefaultXDisplay())), mXssInfo);
*aIdleTime = mXssInfo->idle;
return true;
}
#endif
return false;
}
bool
nsIdleServiceQt::UsePollMode()
{
#if !defined(MOZ_PLATFORM_MAEMO) && defined(MOZ_X11)
return false;
#endif
return true;
}