123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172 |
- // 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.
- #ifndef ASH_KEYBOARD_UI_NOTIFICATION_MANAGER_H_
- #define ASH_KEYBOARD_UI_NOTIFICATION_MANAGER_H_
- #include "ash/keyboard/ui/keyboard_export.h"
- #include "base/observer_list.h"
- #include "ui/gfx/geometry/rect.h"
- namespace ash {
- class KeyboardControllerObserver;
- }
- namespace keyboard {
- template <typename T>
- class ValueNotificationConsolidator {
- public:
- explicit ValueNotificationConsolidator(const T& initial_value);
- bool ShouldSendNotification(const T& new_value);
- private:
- T value_;
- };
- // Logic for consolidating consecutive identical notifications from the
- // KeyboardControllerObserver.
- class KEYBOARD_EXPORT NotificationManager {
- public:
- NotificationManager();
- // Sends various KeyboardControllerObserver notifications related to bounds
- // changes:
- // - visual bounds change
- // - occluded bounds change
- // - layout displacement bounds change
- // - general visibility change
- void SendNotifications(
- bool does_occluded_bounds_affect_layout,
- const gfx::Rect& visual_bounds,
- const gfx::Rect& occluded_bounds,
- const base::ObserverList<ash::KeyboardControllerObserver>::Unchecked&
- observers);
- bool ShouldSendVisibilityNotification(bool current_visibility);
- bool ShouldSendVisualBoundsNotification(const gfx::Rect& new_bounds);
- bool ShouldSendOccludedBoundsNotification(const gfx::Rect& new_bounds);
- bool ShouldSendWorkspaceDisplacementBoundsNotification(
- const gfx::Rect& new_bounds);
- private:
- // ValueNotificationConsolidator uses == for comparison, but empty rectangles
- // ought to be considered equal regardless of location or non-zero dimensions.
- // This method will return a default empty (0,0,0,0) rectangle for any 0-area
- // rectangle, otherwise it returns the original rectangle, unmodified.
- gfx::Rect CanonicalizeEmptyRectangles(const gfx::Rect& rect) const;
- ValueNotificationConsolidator<bool> visibility_;
- ValueNotificationConsolidator<gfx::Rect> visual_bounds_;
- ValueNotificationConsolidator<gfx::Rect> occluded_bounds_;
- ValueNotificationConsolidator<gfx::Rect> workspace_displaced_bounds_;
- };
- } // namespace keyboard
- #endif // ASH_KEYBOARD_UI_NOTIFICATION_MANAGER_H_
|