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/*
* Copyright (C) 2020 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.launcher3.statemanager;
import android.content.Context;
import com.android.launcher3.DeviceProfile;
/**
* Interface representing a state of a StatefulActivity
*/
public interface BaseState<T extends BaseState> {
// Flag to indicate that Launcher is non-interactive in this state
int FLAG_NON_INTERACTIVE = 1 << 0;
int FLAG_DISABLE_RESTORE = 1 << 1;
static int getFlag(int index) {
// reserve few spots to base flags
return 1 << (index + 2);
}
/**
* @return How long the animation to this state should take (or from this state to NORMAL).
*/
int getTransitionDuration(Context context);
/**
* Returns the state to go back to from this state
*/
T getHistoryForState(T previousState);
/**
* @return true if the state can be persisted across activity restarts.
*/
default boolean shouldDisableRestore() {
return hasFlag(FLAG_DISABLE_RESTORE);
}
/**
* Returns if the state has the provided flag
*/
boolean hasFlag(int flagMask);
/**
* For this state, whether tasks should layout as a grid rather than a list.
*/
default boolean displayOverviewTasksAsGrid(DeviceProfile deviceProfile) {
return false;
}
}
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