зеркало из https://github.com/mozilla/gecko-dev.git
112 строки
3.6 KiB
C++
112 строки
3.6 KiB
C++
/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* vim:expandtab:shiftwidth=4:tabstop=4:
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*/
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#include <gtk/gtk.h>
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#include "nsIdleServiceGTK.h"
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#include "nsIServiceManager.h"
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#include "nsDebug.h"
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#include "prlink.h"
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#include "mozilla/Logging.h"
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using mozilla::LogLevel;
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static mozilla::LazyLogModule sIdleLog("nsIIdleService");
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typedef bool (*_XScreenSaverQueryExtension_fn)(Display* dpy, int* event_base,
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int* error_base);
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typedef XScreenSaverInfo* (*_XScreenSaverAllocInfo_fn)(void);
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typedef void (*_XScreenSaverQueryInfo_fn)(Display* dpy, Drawable drw,
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XScreenSaverInfo* info);
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static bool sInitialized = false;
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static _XScreenSaverQueryExtension_fn _XSSQueryExtension = nullptr;
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static _XScreenSaverAllocInfo_fn _XSSAllocInfo = nullptr;
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static _XScreenSaverQueryInfo_fn _XSSQueryInfo = nullptr;
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static void Initialize() {
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if (!GDK_IS_X11_DISPLAY(gdk_display_get_default())) return;
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// This will leak - See comments in ~nsIdleServiceGTK().
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PRLibrary* xsslib = PR_LoadLibrary("libXss.so.1");
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if (!xsslib) // ouch.
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{
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MOZ_LOG(sIdleLog, LogLevel::Warning, ("Failed to find libXss.so!\n"));
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return;
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}
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_XSSQueryExtension = (_XScreenSaverQueryExtension_fn)PR_FindFunctionSymbol(
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xsslib, "XScreenSaverQueryExtension");
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_XSSAllocInfo = (_XScreenSaverAllocInfo_fn)PR_FindFunctionSymbol(
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xsslib, "XScreenSaverAllocInfo");
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_XSSQueryInfo = (_XScreenSaverQueryInfo_fn)PR_FindFunctionSymbol(
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xsslib, "XScreenSaverQueryInfo");
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if (!_XSSQueryExtension)
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MOZ_LOG(sIdleLog, LogLevel::Warning,
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("Failed to get XSSQueryExtension!\n"));
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if (!_XSSAllocInfo)
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MOZ_LOG(sIdleLog, LogLevel::Warning, ("Failed to get XSSAllocInfo!\n"));
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if (!_XSSQueryInfo)
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MOZ_LOG(sIdleLog, LogLevel::Warning, ("Failed to get XSSQueryInfo!\n"));
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sInitialized = true;
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}
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nsIdleServiceGTK::nsIdleServiceGTK() : mXssInfo(nullptr) { Initialize(); }
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nsIdleServiceGTK::~nsIdleServiceGTK() {
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if (mXssInfo) XFree(mXssInfo);
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// It is not safe to unload libXScrnSaver until each display is closed because
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// the library registers callbacks through XESetCloseDisplay (Bug 397607).
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// (Also the library and its functions are scoped for the file not the object.)
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#if 0
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if (xsslib) {
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PR_UnloadLibrary(xsslib);
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xsslib = nullptr;
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}
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#endif
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}
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bool nsIdleServiceGTK::PollIdleTime(uint32_t* aIdleTime) {
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if (!sInitialized) {
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// For some reason, we could not find xscreensaver.
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return false;
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}
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// Ask xscreensaver about idle time:
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*aIdleTime = 0;
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// We might not have a display (cf. in xpcshell)
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Display* dplay = GDK_DISPLAY_XDISPLAY(gdk_display_get_default());
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if (!dplay) {
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MOZ_LOG(sIdleLog, LogLevel::Warning, ("No display found!\n"));
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return false;
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}
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if (!_XSSQueryExtension || !_XSSAllocInfo || !_XSSQueryInfo) {
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return false;
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}
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int event_base, error_base;
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if (_XSSQueryExtension(dplay, &event_base, &error_base)) {
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if (!mXssInfo) mXssInfo = _XSSAllocInfo();
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if (!mXssInfo) return false;
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_XSSQueryInfo(dplay, GDK_ROOT_WINDOW(), mXssInfo);
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*aIdleTime = mXssInfo->idle;
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return true;
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}
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// If we get here, we couldn't get to XScreenSaver:
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MOZ_LOG(sIdleLog, LogLevel::Warning, ("XSSQueryExtension returned false!\n"));
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return false;
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}
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bool nsIdleServiceGTK::UsePollMode() { return sInitialized; }
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