[Remoting Client] DesktopViewport Implementation

remoting/client/viewport_geometry.cc

Index: remoting/client/viewport_geometry.cc
diff --git a/remoting/client/viewport_geometry.cc b/remoting/client/viewport_geometry.cc
new file mode 100644
index 0000000000000000000000000000000000000000..0c75aee4409e9d66633b6385213c9cef4fc630da
--- /dev/null
+++ b/remoting/client/viewport_geometry.cc
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+// Copyright 2017 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 "remoting/client/viewport_geometry.h"
+
+namespace remoting {
+
+Point ConstrainPointToBounds(const Bounds& bounds, const Point& point) {
+  Point new_point = point;
+  if (new_point.x < bounds.left) {
+    new_point.x = bounds.left;
+  } else if (new_point.x > bounds.right) {
+    new_point.x = bounds.right;
+  }
+
+  if (new_point.y < bounds.top) {
+    new_point.y = bounds.top;
+  } else if (new_point.y > bounds.bottom) {
+    new_point.y = bounds.bottom;
+  }
+  return new_point;
+}
+
+}  // namespace remoting