1 files changed, 112 insertions, 0 deletions
diff --git a/chromium/ui/wm/core/user_activity_detector.cc b/chromium/ui/wm/core/user_activity_detector.cc
new file mode 100644
index 00000000000..56bf563b3d0
--- /dev/null
+++ b/chromium/ui/wm/core/user_activity_detector.cc
@@ -0,0 +1,112 @@
+// Copyright 2014 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 "ui/wm/core/user_activity_detector.h"
+
+#include "base/format_macros.h"
+#include "base/logging.h"
+#include "base/strings/stringprintf.h"
+#include "ui/events/event.h"
+#include "ui/wm/core/user_activity_observer.h"
+
+namespace wm {
+
+namespace {
+
+// Returns a string describing |event|.
+std::string GetEventDebugString(const ui::Event* event) {
+  std::string details = base::StringPrintf(
+      "type=%d name=%s flags=%d time=%" PRId64,
+      event->type(), event->name().c_str(), event->flags(),
+      event->time_stamp().InMilliseconds());
+
+  if (event->IsKeyEvent()) {
+    details += base::StringPrintf(" key_code=%d",
+        static_cast<const ui::KeyEvent*>(event)->key_code());
+  } else if (event->IsMouseEvent() || event->IsTouchEvent() ||
+             event->IsGestureEvent()) {
+    details += base::StringPrintf(" location=%s",
+        static_cast<const ui::LocatedEvent*>(
+            event)->location().ToString().c_str());
+  }
+
+  return details;
+}
+
+}  // namespace
+
+const int UserActivityDetector::kNotifyIntervalMs = 200;
+
+// Too low and mouse events generated at the tail end of reconfiguration
+// will be reported as user activity and turn the screen back on; too high
+// and we'll ignore legitimate activity.
+const int UserActivityDetector::kDisplayPowerChangeIgnoreMouseMs = 1000;
+
+UserActivityDetector::UserActivityDetector() {
+}
+
+UserActivityDetector::~UserActivityDetector() {
+}
+
+bool UserActivityDetector::HasObserver(UserActivityObserver* observer) const {
+  return observers_.HasObserver(observer);
+}
+
+void UserActivityDetector::AddObserver(UserActivityObserver* observer) {
+  observers_.AddObserver(observer);
+}
+
+void UserActivityDetector::RemoveObserver(UserActivityObserver* observer) {
+  observers_.RemoveObserver(observer);
+}
+
+void UserActivityDetector::OnDisplayPowerChanging() {
+  honor_mouse_events_time_ = GetCurrentTime() +
+      base::TimeDelta::FromMilliseconds(kDisplayPowerChangeIgnoreMouseMs);
+}
+
+void UserActivityDetector::OnKeyEvent(ui::KeyEvent* event) {
+  HandleActivity(event);
+}
+
+void UserActivityDetector::OnMouseEvent(ui::MouseEvent* event) {
+  if (event->flags() & ui::EF_IS_SYNTHESIZED)
+    return;
+  if (!honor_mouse_events_time_.is_null() &&
+      GetCurrentTime() < honor_mouse_events_time_)
+    return;
+
+  HandleActivity(event);
+}
+
+void UserActivityDetector::OnScrollEvent(ui::ScrollEvent* event) {
+  HandleActivity(event);
+}
+
+void UserActivityDetector::OnTouchEvent(ui::TouchEvent* event) {
+  HandleActivity(event);
+}
+
+void UserActivityDetector::OnGestureEvent(ui::GestureEvent* event) {
+  HandleActivity(event);
+}
+
+base::TimeTicks UserActivityDetector::GetCurrentTime() const {
+  return !now_for_test_.is_null() ? now_for_test_ : base::TimeTicks::Now();
+}
+
+void UserActivityDetector::HandleActivity(const ui::Event* event) {
+  base::TimeTicks now = GetCurrentTime();
+  last_activity_time_ = now;
+  if (last_observer_notification_time_.is_null() ||
+      (now - last_observer_notification_time_).InMillisecondsF() >=
+      kNotifyIntervalMs) {
+    if (VLOG_IS_ON(1))
+      VLOG(1) << "Reporting user activity: " << GetEventDebugString(event);
+    FOR_EACH_OBSERVER(UserActivityObserver, observers_, OnUserActivity(event));
+    last_observer_notification_time_ = now;
+  }
+}
+
+}  // namespace wm