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/* -*- 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;
}
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