1 // Copyright (c) 2010 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 <limits.h> 8 #include <windows.h> 9 10 static bool IsScreensaverRunning(); 11 static bool IsWorkstationLocked(); 12 13 IdleState CalculateIdleState(unsigned int idle_threshold) { 14 if (IsScreensaverRunning() || IsWorkstationLocked()) 15 return IDLE_STATE_LOCKED; 16 17 LASTINPUTINFO last_input_info = {0}; 18 last_input_info.cbSize = sizeof(LASTINPUTINFO); 19 DWORD current_idle_time = 0; 20 if (::GetLastInputInfo(&last_input_info)) { 21 current_idle_time = ::GetTickCount() - last_input_info.dwTime; 22 // Will go -ve if we have been idle for a long time (2gb seconds). 23 if (current_idle_time < 0) 24 current_idle_time = INT_MAX; 25 // Convert from ms to seconds. 26 current_idle_time /= 1000; 27 } 28 29 if (current_idle_time >= idle_threshold) 30 return IDLE_STATE_IDLE; 31 return IDLE_STATE_ACTIVE; 32 } 33 34 bool IsScreensaverRunning() { 35 DWORD result = 0; 36 if (::SystemParametersInfo(SPI_GETSCREENSAVERRUNNING, 0, &result, 0)) 37 return result != FALSE; 38 return false; 39 } 40 41 bool IsWorkstationLocked() { 42 bool is_locked = true; 43 HDESK input_desk = ::OpenInputDesktop(0, 0, GENERIC_READ); 44 if (input_desk) { 45 wchar_t name[256] = {0}; 46 DWORD needed = 0; 47 if (::GetUserObjectInformation(input_desk, 48 UOI_NAME, 49 name, 50 sizeof(name), 51 &needed)) { 52 is_locked = lstrcmpi(name, L"default") != 0; 53 } 54 ::CloseDesktop(input_desk); 55 } 56 return is_locked; 57 } 58
