chromeos: Move files in //ash/common to //ash, part 2

ash/common/wm/workspace/two_step_edge_cycler.cc

-// 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 "ash/common/wm/workspace/two_step_edge_cycler.h"
-
-#include <cstdlib>
-
-namespace ash {
-namespace {
-
-// We cycle to the second mode if any of the following happens while the mouse
-// is on the edge of the workspace:
-// . The user stops moving the mouse for |kMaxDelay| and then moves the mouse
-//   again in the preferred direction from the last paused location for at least
-//   |kMaxPixelsAfterPause| horizontal pixels.
-// . The mouse moves |kMaxPixels| horizontal pixels in the preferred direction.
-// . The mouse is moved |kMaxMoves| times since the last pause.
-const int kMaxDelay = 400;
-const int kMaxPixels = 100;
-const int kMaxPixelsAfterPause = 10;
-const int kMaxMoves = 25;
-
-}  // namespace
-
-TwoStepEdgeCycler::TwoStepEdgeCycler(const gfx::Point& start,
-                                     TwoStepEdgeCycler::Direction direction)
-    : second_mode_(false),
-      time_last_move_(base::TimeTicks::Now()),
-      num_moves_(0),
-      start_x_(start.x()),
-      paused_x_(start.x()),
-      paused_(false),
-      direction_(direction) {}
-
-TwoStepEdgeCycler::~TwoStepEdgeCycler() {}
-
-void TwoStepEdgeCycler::OnMove(const gfx::Point& location) {
-  if (second_mode_)
-    return;
-
-  if ((base::TimeTicks::Now() - time_last_move_).InMilliseconds() > kMaxDelay) {
-    paused_ = true;
-    paused_x_ = location.x();
-    num_moves_ = 0;
-  }
-  time_last_move_ = base::TimeTicks::Now();
-
-  int compare_x = paused_ ? paused_x_ : start_x_;
-  if (location.x() != compare_x &&
-      (location.x() < compare_x) != (direction_ == DIRECTION_LEFT)) {
-    return;
-  }
-
-  ++num_moves_;
-  bool moved_in_the_same_direction_after_pause =
-      paused_ && std::abs(location.x() - paused_x_) >= kMaxPixelsAfterPause;
-  second_mode_ = moved_in_the_same_direction_after_pause ||
-                 std::abs(location.x() - start_x_) >= kMaxPixels ||
-                 num_moves_ >= kMaxMoves;
-}
-
-}  // namespace ash