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widget/gtk/nsIdleServiceGTK.cpp@b8a032363ba2 (annotated)

widget/gtk/nsIdleServiceGTK.cpp

Thu, 22 Jan 2015 13:21:57 +0100

author

Michael Schloh von Bennewitz <michael@schloh.com>

date

Thu, 22 Jan 2015 13:21:57 +0100

branch

TOR_BUG_9701

changeset 15

b8a032363ba2

permissions

-rw-r--r--

Incorporate requested changes from Mozilla in review:
https://bugzilla.mozilla.org/show_bug.cgi?id=1123480#c6

michael@0	1	/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
michael@0	2	/* vim:expandtab:shiftwidth=4:tabstop=4:
michael@0	3	*/
michael@0	4	/* This Source Code Form is subject to the terms of the Mozilla Public
michael@0	5	* License, v. 2.0. If a copy of the MPL was not distributed with this
michael@0	6	* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
michael@0	7
michael@0	8	#include <gtk/gtk.h>
michael@0	9
michael@0	10	#include "nsIdleServiceGTK.h"
michael@0	11	#include "nsIServiceManager.h"
michael@0	12	#include "nsDebug.h"
michael@0	13	#include "prlink.h"
michael@0	14	#include "prlog.h"
michael@0	15
michael@0	16	#ifdef PR_LOGGING
michael@0	17	static PRLogModuleInfo* sIdleLog = nullptr;
michael@0	18	#endif
michael@0	19
michael@0	20	typedef bool (*_XScreenSaverQueryExtension_fn)(Display* dpy, int* event_base,
michael@0	21	int* error_base);
michael@0	22
michael@0	23	typedef XScreenSaverInfo* (*_XScreenSaverAllocInfo_fn)(void);
michael@0	24
michael@0	25	typedef void (*_XScreenSaverQueryInfo_fn)(Display* dpy, Drawable drw,
michael@0	26	XScreenSaverInfo *info);
michael@0	27
michael@0	28	static bool sInitialized = false;
michael@0	29	static _XScreenSaverQueryExtension_fn _XSSQueryExtension = nullptr;
michael@0	30	static _XScreenSaverAllocInfo_fn _XSSAllocInfo = nullptr;
michael@0	31	static _XScreenSaverQueryInfo_fn _XSSQueryInfo = nullptr;
michael@0	32
michael@0	33	NS_IMPL_ISUPPORTS_INHERITED0(nsIdleServiceGTK, nsIdleService)
michael@0	34
michael@0	35	static void Initialize()
michael@0	36	{
michael@0	37	// This will leak - See comments in ~nsIdleServiceGTK().
michael@0	38	PRLibrary* xsslib = PR_LoadLibrary("libXss.so.1");
michael@0	39	if (!xsslib) // ouch.
michael@0	40	{
michael@0	41	#ifdef PR_LOGGING
michael@0	42	PR_LOG(sIdleLog, PR_LOG_WARNING, ("Failed to find libXss.so!\n"));
michael@0	43	#endif
michael@0	44	return;
michael@0	45	}
michael@0	46
michael@0	47	_XSSQueryExtension = (_XScreenSaverQueryExtension_fn)
michael@0	48	PR_FindFunctionSymbol(xsslib, "XScreenSaverQueryExtension");
michael@0	49	_XSSAllocInfo = (_XScreenSaverAllocInfo_fn)
michael@0	50	PR_FindFunctionSymbol(xsslib, "XScreenSaverAllocInfo");
michael@0	51	_XSSQueryInfo = (_XScreenSaverQueryInfo_fn)
michael@0	52	PR_FindFunctionSymbol(xsslib, "XScreenSaverQueryInfo");
michael@0	53	#ifdef PR_LOGGING
michael@0	54	if (!_XSSQueryExtension)
michael@0	55	PR_LOG(sIdleLog, PR_LOG_WARNING, ("Failed to get XSSQueryExtension!\n"));
michael@0	56	if (!_XSSAllocInfo)
michael@0	57	PR_LOG(sIdleLog, PR_LOG_WARNING, ("Failed to get XSSAllocInfo!\n"));
michael@0	58	if (!_XSSQueryInfo)
michael@0	59	PR_LOG(sIdleLog, PR_LOG_WARNING, ("Failed to get XSSQueryInfo!\n"));
michael@0	60	#endif
michael@0	61
michael@0	62	sInitialized = true;
michael@0	63	}
michael@0	64
michael@0	65	nsIdleServiceGTK::nsIdleServiceGTK()
michael@0	66	: mXssInfo(nullptr)
michael@0	67	{
michael@0	68	#ifdef PR_LOGGING
michael@0	69	if (!sIdleLog)
michael@0	70	sIdleLog = PR_NewLogModule("nsIIdleService");
michael@0	71	#endif
michael@0	72
michael@0	73	Initialize();
michael@0	74	}
michael@0	75
michael@0	76	nsIdleServiceGTK::~nsIdleServiceGTK()
michael@0	77	{
michael@0	78	if (mXssInfo)
michael@0	79	XFree(mXssInfo);
michael@0	80
michael@0	81	// It is not safe to unload libXScrnSaver until each display is closed because
michael@0	82	// the library registers callbacks through XESetCloseDisplay (Bug 397607).
michael@0	83	// (Also the library and its functions are scoped for the file not the object.)
michael@0	84	#if 0
michael@0	85	if (xsslib) {
michael@0	86	PR_UnloadLibrary(xsslib);
michael@0	87	xsslib = nullptr;
michael@0	88	}
michael@0	89	#endif
michael@0	90	}
michael@0	91
michael@0	92	bool
michael@0	93	nsIdleServiceGTK::PollIdleTime(uint32_t *aIdleTime)
michael@0	94	{
michael@0	95	if (!sInitialized) {
michael@0	96	// For some reason, we could not find xscreensaver.
michael@0	97	return false;
michael@0	98	}
michael@0	99
michael@0	100	// Ask xscreensaver about idle time:
michael@0	101	*aIdleTime = 0;
michael@0	102
michael@0	103	// We might not have a display (cf. in xpcshell)
michael@0	104	Display *dplay = GDK_DISPLAY_XDISPLAY(gdk_display_get_default());
michael@0	105	if (!dplay) {
michael@0	106	#ifdef PR_LOGGING
michael@0	107	PR_LOG(sIdleLog, PR_LOG_WARNING, ("No display found!\n"));
michael@0	108	#endif
michael@0	109	return false;
michael@0	110	}
michael@0	111
michael@0	112	if (!_XSSQueryExtension || !_XSSAllocInfo || !_XSSQueryInfo) {
michael@0	113	return false;
michael@0	114	}
michael@0	115
michael@0	116	int event_base, error_base;
michael@0	117	if (_XSSQueryExtension(dplay, &event_base, &error_base))
michael@0	118	{
michael@0	119	if (!mXssInfo)
michael@0	120	mXssInfo = _XSSAllocInfo();
michael@0	121	if (!mXssInfo)
michael@0	122	return false;
michael@0	123	_XSSQueryInfo(dplay, GDK_ROOT_WINDOW(), mXssInfo);
michael@0	124	*aIdleTime = mXssInfo->idle;
michael@0	125	return true;
michael@0	126	}
michael@0	127	// If we get here, we couldn't get to XScreenSaver:
michael@0	128	#ifdef PR_LOGGING
michael@0	129	PR_LOG(sIdleLog, PR_LOG_WARNING, ("XSSQueryExtension returned false!\n"));
michael@0	130	#endif
michael@0	131	return false;
michael@0	132	}
michael@0	133
michael@0	134	bool
michael@0	135	nsIdleServiceGTK::UsePollMode()
michael@0	136	{
michael@0	137	return sInitialized;
michael@0	138	}
michael@0	139