widget/qt/nsIdleServiceQt.cpp@ac0c01689b40 (annotated)
widget/qt/nsIdleServiceQt.cpp
Thu, 15 Jan 2015 15:59:08 +0100
- author
- Michael Schloh von Bennewitz <michael@schloh.com>
- date
- Thu, 15 Jan 2015 15:59:08 +0100
- branch
- TOR_BUG_9701
- changeset 10
- ac0c01689b40
- permissions
- -rw-r--r--
Implement a real Private Browsing Mode condition by changing the API/ABI;
This solves Tor bug #9701, complying with disk avoidance documented in
https://www.torproject.org/projects/torbrowser/design/#disk-avoidance.
| 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 | #ifdef MOZ_X11 |
| michael@0 | 9 | #include "mozilla/X11Util.h" |
| michael@0 | 10 | #endif |
| michael@0 | 11 | #include "nsIdleServiceQt.h" |
| michael@0 | 12 | #include "nsIServiceManager.h" |
| michael@0 | 13 | #include "nsDebug.h" |
| michael@0 | 14 | #include "prlink.h" |
| michael@0 | 15 | |
| michael@0 | 16 | #if defined(MOZ_X11) |
| michael@0 | 17 | typedef bool (*_XScreenSaverQueryExtension_fn)(Display* dpy, int* event_base, |
| michael@0 | 18 | int* error_base); |
| michael@0 | 19 | |
| michael@0 | 20 | typedef XScreenSaverInfo* (*_XScreenSaverAllocInfo_fn)(void); |
| michael@0 | 21 | |
| michael@0 | 22 | typedef void (*_XScreenSaverQueryInfo_fn)(Display* dpy, Drawable drw, |
| michael@0 | 23 | XScreenSaverInfo *info); |
| michael@0 | 24 | |
| michael@0 | 25 | static _XScreenSaverQueryExtension_fn _XSSQueryExtension = nullptr; |
| michael@0 | 26 | static _XScreenSaverAllocInfo_fn _XSSAllocInfo = nullptr; |
| michael@0 | 27 | static _XScreenSaverQueryInfo_fn _XSSQueryInfo = nullptr; |
| michael@0 | 28 | #endif |
| michael@0 | 29 | |
| michael@0 | 30 | static bool sInitialized = false; |
| michael@0 | 31 | |
| michael@0 | 32 | NS_IMPL_ISUPPORTS_INHERITED0(nsIdleServiceQt, nsIdleService) |
| michael@0 | 33 | |
| michael@0 | 34 | nsIdleServiceQt::nsIdleServiceQt() |
| michael@0 | 35 | #if defined(MOZ_X11) |
| michael@0 | 36 | : mXssInfo(nullptr) |
| michael@0 | 37 | #endif |
| michael@0 | 38 | { |
| michael@0 | 39 | } |
| michael@0 | 40 | |
| michael@0 | 41 | static void Initialize() |
| michael@0 | 42 | { |
| michael@0 | 43 | sInitialized = true; |
| michael@0 | 44 | |
| michael@0 | 45 | #if defined(MOZ_X11) |
| michael@0 | 46 | // This will leak - See comments in ~nsIdleServiceQt(). |
| michael@0 | 47 | PRLibrary* xsslib = PR_LoadLibrary("libXss.so.1"); |
| michael@0 | 48 | if (!xsslib) { |
| michael@0 | 49 | return; |
| michael@0 | 50 | } |
| michael@0 | 51 | |
| michael@0 | 52 | _XSSQueryExtension = (_XScreenSaverQueryExtension_fn) |
| michael@0 | 53 | PR_FindFunctionSymbol(xsslib, "XScreenSaverQueryExtension"); |
| michael@0 | 54 | _XSSAllocInfo = (_XScreenSaverAllocInfo_fn) |
| michael@0 | 55 | PR_FindFunctionSymbol(xsslib, "XScreenSaverAllocInfo"); |
| michael@0 | 56 | _XSSQueryInfo = (_XScreenSaverQueryInfo_fn) |
| michael@0 | 57 | PR_FindFunctionSymbol(xsslib, "XScreenSaverQueryInfo"); |
| michael@0 | 58 | #endif |
| michael@0 | 59 | } |
| michael@0 | 60 | |
| michael@0 | 61 | nsIdleServiceQt::~nsIdleServiceQt() |
| michael@0 | 62 | { |
| michael@0 | 63 | #if defined(MOZ_X11) |
| michael@0 | 64 | if (mXssInfo) |
| michael@0 | 65 | XFree(mXssInfo); |
| michael@0 | 66 | |
| michael@0 | 67 | // It is not safe to unload libXScrnSaver until each display is closed because |
| michael@0 | 68 | // the library registers callbacks through XESetCloseDisplay (Bug 397607). |
| michael@0 | 69 | // (Also the library and its functions are scoped for the file not the object.) |
| michael@0 | 70 | #if 0 |
| michael@0 | 71 | if (xsslib) { |
| michael@0 | 72 | PR_UnloadLibrary(xsslib); |
| michael@0 | 73 | xsslib = nullptr; |
| michael@0 | 74 | } |
| michael@0 | 75 | #endif |
| michael@0 | 76 | #endif |
| michael@0 | 77 | } |
| michael@0 | 78 | |
| michael@0 | 79 | bool |
| michael@0 | 80 | nsIdleServiceQt::PollIdleTime(uint32_t *aIdleTime) |
| michael@0 | 81 | { |
| michael@0 | 82 | #if defined(MOZ_X11) |
| michael@0 | 83 | // Ask xscreensaver about idle time: |
| michael@0 | 84 | *aIdleTime = 0; |
| michael@0 | 85 | |
| michael@0 | 86 | // We might not have a display (cf. in xpcshell) |
| michael@0 | 87 | Display *dplay = mozilla::DefaultXDisplay(); |
| michael@0 | 88 | if (!dplay) { |
| michael@0 | 89 | return false; |
| michael@0 | 90 | } |
| michael@0 | 91 | |
| michael@0 | 92 | if (!sInitialized) { |
| michael@0 | 93 | Initialize(); |
| michael@0 | 94 | } |
| michael@0 | 95 | if (!_XSSQueryExtension || !_XSSAllocInfo || !_XSSQueryInfo) { |
| michael@0 | 96 | return false; |
| michael@0 | 97 | } |
| michael@0 | 98 | |
| michael@0 | 99 | int event_base, error_base; |
| michael@0 | 100 | if (_XSSQueryExtension(dplay, &event_base, &error_base)) { |
| michael@0 | 101 | if (!mXssInfo) |
| michael@0 | 102 | mXssInfo = _XSSAllocInfo(); |
| michael@0 | 103 | if (!mXssInfo) |
| michael@0 | 104 | return false; |
| michael@0 | 105 | |
| michael@0 | 106 | _XSSQueryInfo(dplay, RootWindowOfScreen(DefaultScreenOfDisplay(mozilla::DefaultXDisplay())), mXssInfo); |
| michael@0 | 107 | *aIdleTime = mXssInfo->idle; |
| michael@0 | 108 | return true; |
| michael@0 | 109 | } |
| michael@0 | 110 | #endif |
| michael@0 | 111 | |
| michael@0 | 112 | return false; |
| michael@0 | 113 | } |
| michael@0 | 114 | |
| michael@0 | 115 | bool |
| michael@0 | 116 | nsIdleServiceQt::UsePollMode() |
| michael@0 | 117 | { |
| michael@0 | 118 | #if defined(MOZ_X11) |
| michael@0 | 119 | return false; |
| michael@0 | 120 | #endif |
| michael@0 | 121 | return true; |
| michael@0 | 122 | } |
| michael@0 | 123 |
