src/com/android/documentsui/ActivityConfig.java

/*
 * Copyright (C) 2016 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.documentsui;

import com.android.documentsui.base.DocumentStack;
import com.android.documentsui.base.State;

/**
 * Provides support for specializing the DirectoryFragment to the "host" Activity.
 * Feel free to expand the role of this class to handle other specializations.
 */
public abstract class ActivityConfig {

    // Subtly different from isDocumentEnabled. The reason may be illuminated as follows.
    // A folder is enabled such that it may be double clicked, even in settings
    // when the folder itself cannot be selected. This may also be true of container types.
    public boolean canSelectType(String docMimeType, int docFlags, State state) {
        return true;
    }

    public boolean isDocumentEnabled(String docMimeType, int docFlags, State state) {
        return true;
    }

    /**
     * When managed mode is enabled, there will be special UI behaviors:
     * 1) active downloads will be visible in the UI.
     * 2) Android/[data|obb|sandbox] directories will not be hidden.
     */
    public boolean managedModeEnabled(DocumentStack stack) {
        return false;
    }

    /**
     * Whether drag n' drop is allowed in this context
     */
    public boolean dragAndDropEnabled() {
        return false;
    }
}