Move bezel event routing for the shelf into ShelfLayoutManager

ash/wm/gestures/border_gesture_handler.h

-// Copyright (c) 2013 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.
-
-#ifndef ASH_WM_GESTURES_BORDER_GESTURE_HANDLER_H_
-#define ASH_WM_GESTURES_BORDER_GESTURE_HANDLER_H_
-
-#include <bitset>
-
-#include "ash/shelf/shelf_types.h"
-#include "ash/wm/gestures/shelf_gesture_handler.h"
-#include "base/basictypes.h"
-
-namespace aura {
-class Window;
-}
-
-namespace gfx {
-class Point;
-class Rect;
-}
-
-namespace ui {
-class GestureEvent;
-}
-
-namespace ash {
-namespace internal {
-
-enum BorderScrollOrientation {
-  BORDER_SCROLL_ORIENTATION_UNSET = 0,
-  BORDER_SCROLL_ORIENTATION_HORIZONTAL,
-  BORDER_SCROLL_ORIENTATION_VERTICAL
-};
-
-// Bit positions of border location flags
-enum BorderLocation {
-  BORDER_LOCATION_BOTTOM = 0,
-  BORDER_LOCATION_LEFT = 1,
-  BORDER_LOCATION_TOP = 2,
-  BORDER_LOCATION_RIGHT = 3,
-  NUM_BORDER_LOCATIONS
-};
-
-typedef std::bitset<NUM_BORDER_LOCATIONS> BorderFlags;
-
-// Handles touch gestures that occur around the border of the display area that
-// might have actions associated with them. It handles both gestures that
-// require a bezel sensor (bezel gestures) and those that do not (edge
-// gestures).
-class BorderGestureHandler {
- public:
-  BorderGestureHandler();
-  ~BorderGestureHandler();
-
-  // Returns true of the gesture has been handled and it should not be processed
-  // any farther, false otherwise.
-  bool ProcessGestureEvent(aura::Window* target, const ui::GestureEvent& event);
-
- private:
-  // Handle events meant for showing the launcher. Returns true when no further
-  // events from this gesture should be sent.
-  bool HandleLauncherControl(const ui::GestureEvent& event);
-
-  bool HandleBorderGestureStart(aura::Window* target,
-                                const ui::GestureEvent& event);
-
-  // Handles a gesture update once the orientation has been found.
-  bool HandleBorderGestureUpdate(aura::Window* target,
-                                 const ui::GestureEvent& event);
-
-  bool HandleBorderGestureEnd(aura::Window* target,
-                              const ui::GestureEvent& event);
-
-  // Check that gesture starts on a bezel or in the edge region of the
-  // screen. If so, set bits in |start_location_|.
-  void GestureStartInTargetArea(const gfx::Rect& screen,
-                                const ui::GestureEvent& event);
-
-  // Determine the gesture orientation (if not yet done).
-  // Returns true when the orientation has been successfully determined.
-  bool DetermineGestureOrientation(const ui::GestureEvent& event);
-
-  // Test if the gesture orientation makes sense to be dragging in or out the
-  // launcher.
-  bool IsGestureInLauncherOrientation(const ui::GestureEvent& event);
-
-  // Which bezel/edges the gesture started in. In the case that a gesture begins
-  // in a corner of the screen more then one flag may be set and the orientation
-  // of the gesture will be needed to disambiguate.
-  BorderFlags start_location_;
-
-  // Orientation relative to the screen that the gesture is moving in
-  BorderScrollOrientation orientation_;
-
-  ShelfGestureHandler shelf_handler_;
-
-  DISALLOW_COPY_AND_ASSIGN(BorderGestureHandler);
-};
-
-}  // namespace internal
-}  // namespace ash
-#endif  // ASH_WM_GESTURES_BORDER_GESTURE_HANDLER_H_