Make the workspace cycler animation parameters editable via chrome://gesture

ash/wm/workspace/workspace_cycler_configuration.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_WORKSPACE_WORKSPACE_CYCLER_CONFIGURATION_H_
+#define ASH_WM_WORKSPACE_WORKSPACE_CYCLER_CONFIGURATION_H_
+
+#include "ash/ash_export.h"
+
+namespace base {
+class ListValue;
+}
+
+namespace ash {
+
+// Sets and retrieves properties related to cycling workspaces.
+class ASH_EXPORT WorkspaceCyclerConfiguration {
+ public:
+  enum Property {
+    // The y offsets for the workspaces which are shallower than the selected
+    // workspace with respect to the top of the screen workarea. The offset at
+    // index 0 is for the workspace closest to the selected workspace. The size
+    // of the ListValue limits the amount of visible workspaces shallower than
+    // the selected workspace.
+    SHALLOWER_THAN_SELECTED_Y_OFFSETS,
+
+    // The y offsets for the workspaces which are deeper than the selected
+    // workspace with respect to the bottom of the screen workarea. The offset
+    // at index 0 is for the workspace closest to the selected workspace. The
+    // size of the ListValue limits the amount of visible workspaces deeper
+    // than the selected workspace.
+    DEEPER_THAN_SELECTED_Y_OFFSETS,
+
+    // The y offset of the selected workspace with respect to the top of the
+    // screen workarea.
+    SELECTED_Y_OFFSET,
+
+    SELECTED_SCALE,
+    MIN_SCALE,
+    MAX_SCALE,
+    MIN_BRIGHTNESS,
+
+    // The background opacity while the user is cycling through workspaces.
+    BACKGROUND_OPACITY,
+
+    // The vertical scroll distance in pixels to initiate workspace cycling.
+    DISTANCE_TO_INITIATE_CYCLING,
+
+    // The vertical scroll distance in pixels to cycle to the next / previous
+    // workspace.
+    SCROLL_DISTANCE_TO_CYCLE_TO_NEXT_WORKSPACE,
+
+    // The ratio of the duration of the animation in milliseconds to the amount
+    // that the user has scrolled vertically in pixels.
+    // The duration of the animation is computed by: distance_scrolled * ratio
+    CYCLER_STEP_ANIMATION_DURATION_RATIO,
+
+    // The duration in milliseconds of the animations when animating starting
+    // the cycler.
+    START_CYCLER_ANIMATION_DURATION,
+
+    // The duration in milliseconds of the animations when animating stopping
+    // the cycler.
+    STOP_CYCLER_ANIMATION_DURATION,
+  };
+
+  // Returns true if the cycler is enabled.

[sky, 2013/02/12 18:30:56]

Classes like this are a pain for testing. Primarily because there is no 'reset
to default state'. I assume this is all temporary, right?

+  static bool IsCyclerEnabled();
+
+  // Returns true if |property| is of type base::ListValue.
+  static bool IsListProperty(Property property);
+
+  // Sets |property| to |list_value|.
+  static void SetListValue(Property property,
+                           const base::ListValue& list_value);
+
+  // Sets |property| to |value|.
+  static void SetDouble(Property property, double value);
+
+  // Gets the ListValue associated with |property|.
+  static const base::ListValue& GetListValue(Property property);
+
+  // Gets the double associated with |property|.
+  static double GetDouble(Property property);
+};

[sky, 2013/02/12 18:30:56]

private: DISALLOW_IMPLICIT_CONSTRUCTORS(...)

+
+}  // namespace ash
+
+#endif  // ASH_WM_WORKSPACE_WORKSPACE_CYCLER_ANIMATOR_CONFIGURATION_H_