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// Copyright (c) 2010 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "chrome/browser/idle.h"
#include <limits.h>
#include <windows.h>
static bool IsScreensaverRunning();
static bool IsWorkstationLocked();
IdleState CalculateIdleState(unsigned int idle_threshold) {
if (IsScreensaverRunning() || IsWorkstationLocked())
return IDLE_STATE_LOCKED;
LASTINPUTINFO last_input_info = {0};
last_input_info.cbSize = sizeof(LASTINPUTINFO);
DWORD current_idle_time = 0;
if (::GetLastInputInfo(&last_input_info)) {
current_idle_time = ::GetTickCount() - last_input_info.dwTime;
// Will go -ve if we have been idle for a long time (2gb seconds).
if (current_idle_time < 0)
current_idle_time = INT_MAX;
// Convert from ms to seconds.
current_idle_time /= 1000;
}
if (current_idle_time >= idle_threshold)
return IDLE_STATE_IDLE;
return IDLE_STATE_ACTIVE;
}
bool IsScreensaverRunning() {
DWORD result = 0;
if (::SystemParametersInfo(SPI_GETSCREENSAVERRUNNING, 0, &result, 0))
return result != FALSE;
return false;
}
bool IsWorkstationLocked() {
bool is_locked = true;
HDESK input_desk = ::OpenInputDesktop(0, 0, GENERIC_READ);
if (input_desk) {
wchar_t name[256] = {0};
DWORD needed = 0;
if (::GetUserObjectInformation(input_desk,
UOI_NAME,
name,
sizeof(name),
&needed)) {
is_locked = lstrcmpi(name, L"default") != 0;
}
::CloseDesktop(input_desk);
}
return is_locked;
}
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