xref: /frameworks/base/packages/SystemUI/src/com/android/systemui/statusbar/notification/stack/NotificationListContainer.java

/*
 * Copyright (C) 2017 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License
 */

package com.android.systemui.statusbar.notification.stack;

import android.view.View;
import android.view.ViewGroup;

import androidx.annotation.Nullable;

import com.android.systemui.plugins.statusbar.NotificationSwipeActionHelper;
import com.android.systemui.statusbar.notification.LaunchAnimationParameters;
import com.android.systemui.statusbar.notification.VisibilityLocationProvider;
import com.android.systemui.statusbar.notification.collection.NotificationEntry;
import com.android.systemui.statusbar.notification.logging.NotificationLogger;
import com.android.systemui.statusbar.notification.row.ExpandableNotificationRow;
import com.android.systemui.statusbar.notification.row.ExpandableView;

/**
 * Interface representing the entity that contains notifications. It can have
 * notification views added and removed from it, and will manage displaying them to the user.
 */
public interface NotificationListContainer extends
        ExpandableView.OnHeightChangedListener,
        VisibilityLocationProvider {

    /**
     * Called when a child is being transferred.
     *
     * @param childTransferInProgress whether child transfer is in progress
     */
    void setChildTransferInProgress(boolean childTransferInProgress);

    /**
     * Change the position of child to a new location
     *  @param child the view to change the position for
     * @param newIndex the new index
     */
    void changeViewPosition(ExpandableView child, int newIndex);

    /**
     * Called when a child was added to a group.
     *
     * @param row row of the group child that was added
     */
    void notifyGroupChildAdded(ExpandableView row);

    /**
     * Called when a child was removed from a group.
     *  @param row row of the child that was removed
     * @param childrenContainer ViewGroup of the group that the child was removed from
     */
    void notifyGroupChildRemoved(ExpandableView row, ViewGroup childrenContainer);

    /**
     * Returns the number of children in the NotificationListContainer.
     *
     * @return the number of children in the NotificationListContainer
     */
    int getContainerChildCount();

    /**
     * Gets the ith child in the NotificationListContainer.
     *
     * @param i ith child to get
     * @return the ith child in the list container
     */
    @Nullable
    View getContainerChildAt(int i);

    /**
     * Remove a view from the container
     *
     * @param v view to remove
     */
    void removeContainerView(View v);

    /**
     * Add a view to the container
     *
     * @param v view to add
     */
    void addContainerView(View v);

    /**
     * Add a view to the container at a particular index
     */
    void addContainerViewAt(View v, int index);

    /** Sets whether the notificatios are displayed on the unoccluded lockscreen. */
    void setOnLockscreen(boolean isOnKeyguard);

    /**
     * Sets the maximum number of notifications to display.
     *
     * @param maxNotifications max number of notifications to display
     */
    void setMaxDisplayedNotifications(int maxNotifications);

    /**
     * Get the view parent for a notification entry. For example, NotificationStackScrollLayout.
     *
     * @return the view parent for entry
     */
    ViewGroup getViewParentForNotification();

    /**
     * Resets the currently exposed menu view.
     *
     * @param animate whether to animate the closing/change of menu view
     * @param force reset the menu view even if it looks like it is already reset
     */
    void resetExposedMenuView(boolean animate, boolean force);

    /**
     * Returns the NotificationSwipeActionHelper for the NotificationListContainer.
     *
     * @return swipe action helper for the list container
     */
    NotificationSwipeActionHelper getSwipeActionHelper();

    /**
     * Called when a notification is removed from the shade. This cleans up the state for a
     * given view.
     *
     * @param entry the entry whose view's view state needs to be cleaned up (say that 5 times fast)
     */
    void cleanUpViewStateForEntry(NotificationEntry entry);


    /**
     * Sets a listener to listen for changes in notification locations.
     *
     * @param listener listener to set
     */
    void setChildLocationsChangedListener(
            NotificationLogger.OnChildLocationsChangedListener listener);

    /**
     * Called when an update to the notification view hierarchy is completed.
     */
    default void onNotificationViewUpdateFinished() {}

    /**
     * Returns true if there are pulsing notifications.
     *
     * @return true if has pulsing notifications
     */
    boolean hasPulsingNotifications();

    /**
     * Apply parameters of the expand animation to the layout
     */
    default void applyLaunchAnimationParams(LaunchAnimationParameters params) {}

    default void setExpandingNotification(ExpandableNotificationRow row) {}

    /**
     * Bind a newly created row.
     *
     * @param row The notification to bind.
     */
    default void bindRow(ExpandableNotificationRow row) {}

    /**
     * @return the start location where we start clipping notifications.
     */
    default int getTopClippingStartLocation() {
        return 0;
    }
}