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// Copyright (c) 2015 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 UI_MESSAGE_CENTER_VIEWS_MESSAGE_LIST_VIEW_H_
#define UI_MESSAGE_CENTER_VIEWS_MESSAGE_LIST_VIEW_H_
#include <list>
#include <set>
#include <vector>
#include "base/macros.h"
#include "ui/compositor/paint_context.h"
#include "ui/gfx/geometry/rect.h"
#include "ui/gfx/geometry/size.h"
#include "ui/message_center/message_center_export.h"
#include "ui/message_center/notification.h"
#include "ui/views/animation/bounds_animator.h"
#include "ui/views/animation/bounds_animator_observer.h"
#include "ui/views/view.h"
namespace ui {
class Layer;
}
namespace message_center {
class MessageView;
// Displays a list of messages for rich notifications. Functions as an array of
// MessageViews and animates them on transitions. It also supports
// repositioning.
class MESSAGE_CENTER_EXPORT MessageListView
: public views::View,
public views::BoundsAnimatorObserver {
public:
class Observer {
public:
virtual void OnAllNotificationsCleared() = 0;
};
MessageListView();
~MessageListView() override;
void AddNotificationAt(MessageView* view, int i);
void RemoveNotification(MessageView* view);
void UpdateNotification(MessageView* view, const Notification& notification);
void SetRepositionTarget(const gfx::Rect& target_rect);
void ResetRepositionSession();
void ClearAllClosableNotifications(const gfx::Rect& visible_scroll_rect);
void AddObserver(Observer* observer);
void RemoveObserver(Observer* observer);
void SetRepositionTargetForTest(
const gfx::Rect& target_rect);
protected:
// Overridden from views::View.
void Layout() override;
gfx::Size GetPreferredSize() const override;
int GetHeightForWidth(int width) const override;
void PaintChildren(const ui::PaintContext& context) override;
void ReorderChildLayers(ui::Layer* parent_layer) override;
// Overridden from views::BoundsAnimatorObserver.
void OnBoundsAnimatorProgressed(views::BoundsAnimator* animator) override;
void OnBoundsAnimatorDone(views::BoundsAnimator* animator) override;
private:
friend class MessageCenterViewTest;
friend class MessageListViewTest;
bool IsValidChild(const views::View* child) const;
void DoUpdateIfPossible();
// Animates all notifications below target upwards to align with the top of
// the last closed notification.
void AnimateNotificationsBelowTarget();
// Animates all notifications above target downwards to align with the top of
// the last closed notification.
void AnimateNotificationsAboveTarget();
// Computes reposition offsets for |AnimateNotificationsAboveTarget|.
std::vector<int> ComputeRepositionOffsets(const std::vector<int>& heights,
const std::vector<bool>& deleting,
int target_index,
int padding);
// Schedules animation for a child to the specified position. Returns false
// if |child| will disappear after the animation.
bool AnimateChild(views::View* child,
int top,
int height,
bool animate_even_on_move);
// Animate clearing one notification.
void AnimateClearingOneNotification();
// List of MessageListView::Observer
base::ObserverList<Observer> observers_;
// The top position of the reposition target rectangle.
int reposition_top_;
int fixed_height_;
bool has_deferred_task_;
bool clear_all_started_;
std::set<views::View*> adding_views_;
std::set<views::View*> deleting_views_;
std::set<views::View*> deleted_when_done_;
std::list<views::View*> clearing_all_views_;
views::BoundsAnimator animator_;
// If true, the message loop will be quitted after the animation finishes.
// This is just for tests and has no setter.
bool quit_message_loop_after_animation_for_test_;
base::WeakPtrFactory<MessageListView> weak_ptr_factory_;
DISALLOW_COPY_AND_ASSIGN(MessageListView);
};
} // namespace message_center
#endif // UI_MESSAGE_CENTER_VIEWS_MESSAGE_LIST_VIEW_H_