chrome/browser/idle_mac.mm

   1 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #include "chrome/browser/idle.h"
   6
   7 #include <ApplicationServices/ApplicationServices.h>
   8 #import <Cocoa/Cocoa.h>
   9
  10 @interface MacScreenMonitor : NSObject {
  11  @private
  12   BOOL screensaverRunning_;
  13   BOOL screenLocked_;
  14 }
  15
  16 @property (readonly,
  17            nonatomic,
  18            getter=isScreensaverRunning) BOOL screensaverRunning;
  19 @property (readonly, nonatomic, getter=isScreenLocked) BOOL screenLocked;
  20
  21 @end
  22
  23 @implementation MacScreenMonitor
  24
  25 @synthesize screensaverRunning = screensaverRunning_;
  26 @synthesize screenLocked = screenLocked_;
  27
  28 - (id)init {
  29   if ((self = [super init])) {
  30     NSDistributedNotificationCenter* distCenter =
  31           [NSDistributedNotificationCenter defaultCenter];
  32     [distCenter addObserver:self
  33                    selector:@selector(onScreenSaverStarted:)
  34                        name:@"com.apple.screensaver.didstart"
  35                      object:nil];
  36     [distCenter addObserver:self
  37                    selector:@selector(onScreenSaverStopped:)
  38                        name:@"com.apple.screensaver.didstop"
  39                      object:nil];
  40     [distCenter addObserver:self
  41                    selector:@selector(onScreenLocked:)
  42                        name:@"com.apple.screenIsLocked"
  43                      object:nil];
  44     [distCenter addObserver:self
  45                    selector:@selector(onScreenUnlocked:)
  46                        name:@"com.apple.screenIsUnlocked"
  47                      object:nil];
  48   }
  49   return self;
  50 }
  51
  52 - (void)dealloc {
  53   [[NSDistributedNotificationCenter defaultCenter] removeObserver:self];
  54   [super dealloc];
  55 }
  56
  57 - (void)onScreenSaverStarted:(NSNotification*)notification {
  58    screensaverRunning_ = YES;
  59 }
  60
  61 - (void)onScreenSaverStopped:(NSNotification*)notification {
  62    screensaverRunning_ = NO;
  63 }
  64
  65 - (void)onScreenLocked:(NSNotification*)notification {
  66    screenLocked_ = YES;
  67 }
  68
  69 - (void)onScreenUnlocked:(NSNotification*)notification {
  70    screenLocked_ = NO;
  71 }
  72
  73 @end
  74
  75 static MacScreenMonitor* g_screenMonitor = nil;
  76
  77 void InitIdleMonitor() {
  78   if (!g_screenMonitor)
  79     g_screenMonitor = [[MacScreenMonitor alloc] init];
  80 }
  81
  82 void CalculateIdleTime(IdleTimeCallback notify) {
  83   CFTimeInterval idle_time = CGEventSourceSecondsSinceLastEventType(
  84       kCGEventSourceStateCombinedSessionState,
  85       kCGAnyInputEventType);
  86   notify.Run(static_cast<int>(idle_time));
  87 }
  88
  89 bool CheckIdleStateIsLocked() {
  90   return [g_screenMonitor isScreensaverRunning] ||
  91       [g_screenMonitor isScreenLocked];
  92 }