Index: ash/common/system/chromeos/palette/tools/laser_pointer_points.cc |
diff --git a/ash/common/system/chromeos/palette/tools/laser_pointer_points.cc b/ash/common/system/chromeos/palette/tools/laser_pointer_points.cc |
new file mode 100644 |
index 0000000000000000000000000000000000000000..5a408fc42ffaedb9120d952d8fcd00d61e4ad232 |
--- /dev/null |
+++ b/ash/common/system/chromeos/palette/tools/laser_pointer_points.cc |
@@ -0,0 +1,83 @@ |
+// Copyright 2016 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 "ash/common/system/chromeos/palette/tools/laser_pointer_points.h" |
+ |
+#include <algorithm> |
+#include <limits> |
+ |
+namespace ash { |
+ |
+LaserPointerPoints::LaserPointerPoints(base::TimeDelta life_duration) |
+ : life_duration_(life_duration) {} |
+ |
+LaserPointerPoints::~LaserPointerPoints() {} |
+ |
+void LaserPointerPoints::AddPoint(const gfx::Point& point) { |
+ LaserPoint new_point; |
+ new_point.location = point; |
+ new_point.creation_time = base::Time::Now(); |
+ points_.push_back(new_point); |
+ ClearOldPoints(); |
+} |
+ |
+void LaserPointerPoints::Clear() { |
+ points_.clear(); |
+} |
+ |
+gfx::Rect LaserPointerPoints::GetBoundingBox() { |
+ if (IsEmpty()) |
+ return gfx::Rect(); |
+ |
+ gfx::Point min_point(std::numeric_limits<int>::max(), |
+ std::numeric_limits<int>::max()); |
+ gfx::Point max_point(std::numeric_limits<int>::min(), |
+ std::numeric_limits<int>::min()); |
oshima
2016/08/24 23:01:03
optional: since you're checking if it's empty, you
sammiequon
2016/08/25 17:59:04
Done.
|
+ for (const LaserPoint& point : points_) { |
+ min_point = gfx::Point(std::min(point.location.x(), min_point.x()), |
+ std::min(point.location.y(), min_point.y())); |
+ max_point = gfx::Point(std::max(point.location.x(), max_point.x()), |
+ std::max(point.location.y(), max_point.y())); |
oshima
2016/08/24 23:01:03
gfx::Point::SetToMin, SetToMax?
sammiequon
2016/08/25 17:59:04
Done.
|
+ } |
+ return gfx::BoundingRect(min_point, max_point); |
+} |
+ |
+LaserPointerPoints::LaserPoint LaserPointerPoints::GetOldest() const { |
+ DCHECK(!IsEmpty()); |
+ return points_.front(); |
+} |
+ |
+LaserPointerPoints::LaserPoint LaserPointerPoints::GetNewest() const { |
+ DCHECK(!IsEmpty()); |
+ return points_.back(); |
+} |
+ |
+bool LaserPointerPoints::IsEmpty() const { |
+ return points_.empty(); |
+} |
+ |
+int LaserPointerPoints::GetNumberOfPoints() const { |
+ return points_.size(); |
+} |
+ |
+std::deque<LaserPointerPoints::LaserPoint>::const_iterator |
+LaserPointerPoints::PointsStart() const { |
+ return points_.cbegin(); |
+} |
+ |
+std::deque<LaserPointerPoints::LaserPoint>::const_iterator |
+LaserPointerPoints::PointsEnd() const { |
+ return points_.cend(); |
+} |
+ |
+void LaserPointerPoints::ClearOldPoints() { |
+ DCHECK(!IsEmpty()); |
+ auto first_alive_point = |
+ std::find_if(points_.begin(), points_.end(), [this](LaserPoint& p) { |
+ return GetNewest().creation_time - p.creation_time < life_duration_; |
+ }); |
+ points_.erase(points_.begin(), first_alive_point); |
+} |
+ |
+} // namespace ash |