1 files changed, 57 insertions, 0 deletions
diff --git a/chrome/browser/idle_win.cc b/chrome/browser/idle_win.cc
new file mode 100644
index 0000000..01afca0
--- /dev/null
+++ b/chrome/browser/idle_win.cc
@@ -0,0 +1,57 @@
+// 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;
+}