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      1 /*
      2  * Copyright (C) 2016 The Android Open Source Project
      3  *
      4  * Licensed under the Apache License, Version 2.0 (the "License");
      5  * you may not use this file except in compliance with the License.
      6  * You may obtain a copy of the License at
      7  *
      8  *      http://www.apache.org/licenses/LICENSE-2.0
      9  *
     10  * Unless required by applicable law or agreed to in writing, software
     11  * distributed under the License is distributed on an "AS IS" BASIS,
     12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
     13  * See the License for the specific language governing permissions and
     14  * limitations under the License.
     15  */
     16 package com.android.documentsui.ui;
     17 
     18 import android.app.Activity;
     19 import android.app.AlertDialog;
     20 import android.app.FragmentManager;
     21 import android.content.DialogInterface;
     22 import android.support.design.widget.Snackbar;
     23 import android.widget.Button;
     24 import android.widget.TextView;
     25 
     26 import com.android.documentsui.R;
     27 import com.android.documentsui.base.ConfirmationCallback;
     28 import com.android.documentsui.base.DocumentInfo;
     29 import com.android.documentsui.picker.OverwriteConfirmFragment;
     30 import com.android.documentsui.services.FileOperationService;
     31 import com.android.documentsui.services.FileOperationService.OpType;
     32 import com.android.documentsui.services.FileOperations;
     33 import com.android.documentsui.services.FileOperations.Callback.Status;
     34 
     35 import java.util.List;
     36 
     37 public interface DialogController {
     38 
     39     // Dialogs used in FilesActivity
     40     void confirmDelete(List<DocumentInfo> docs, ConfirmationCallback callback);
     41     void showFileOperationStatus(int status, int opType, int docCount);
     42     void showNoApplicationFound();
     43     void showViewInArchivesUnsupported();
     44     void showDocumentsClipped(int size);
     45 
     46     // Dialogs used in PickActivity
     47     void confirmOverwrite(FragmentManager fm, DocumentInfo overwriteTarget);
     48 
     49     // Should be private, but Java doesn't like me treating an interface like a mini-package.
     50     public static final class RuntimeDialogController implements DialogController {
     51 
     52         private final Activity mActivity;
     53         private final MessageBuilder mMessages;
     54 
     55         public RuntimeDialogController(Activity activity, MessageBuilder messages) {
     56             mActivity = activity;
     57             mMessages = messages;
     58         }
     59 
     60         @Override
     61         public void confirmDelete(List<DocumentInfo> docs, ConfirmationCallback callback) {
     62             assert(!docs.isEmpty());
     63 
     64             TextView message =
     65                     (TextView) mActivity.getLayoutInflater().inflate(
     66                             R.layout.dialog_delete_confirmation, null);
     67             message.setText(mMessages.generateDeleteMessage(docs));
     68 
     69             // For now, we implement this dialog NOT
     70             // as a fragment (which can survive rotation and have its own state),
     71             // but as a simple runtime dialog. So rotating a device with an
     72             // active delete dialog...results in that dialog disappearing.
     73             // We can do better, but don't have cycles for it now.
     74             final AlertDialog alertDialog = new AlertDialog.Builder(mActivity)
     75                     .setView(message)
     76                     .setPositiveButton(
     77                             android.R.string.ok,
     78                             new DialogInterface.OnClickListener() {
     79                                 @Override
     80                                 public void onClick(DialogInterface dialog, int id) {
     81                                     callback.accept(ConfirmationCallback.CONFIRM);
     82                                 }
     83                             })
     84                     .setNegativeButton(android.R.string.cancel, null)
     85                     .create();
     86 
     87             alertDialog.setOnShowListener(
     88                     (DialogInterface) -> {
     89                         Button positive = alertDialog.getButton(AlertDialog.BUTTON_POSITIVE);
     90                         positive.setFocusable(true);
     91                         positive.requestFocus();
     92                     });
     93             alertDialog.show();
     94         }
     95 
     96         @Override
     97         public void showFileOperationStatus(
     98                 @Status int status, @OpType int opType, int docCount) {
     99             if (status == FileOperations.Callback.STATUS_REJECTED) {
    100                 Snackbars.showOperationRejected(mActivity);
    101                 return;
    102             }
    103             if (status == FileOperations.Callback.STATUS_FAILED) {
    104                 Snackbars.showOperationFailed(mActivity);
    105                 return;
    106             }
    107 
    108             if (docCount == 0) {
    109                 // Nothing has been pasted, so there is no need to show a snackbar.
    110                 return;
    111             }
    112 
    113             switch (opType) {
    114                 case FileOperationService.OPERATION_MOVE:
    115                     Snackbars.showMove(mActivity, docCount);
    116                     break;
    117                 case FileOperationService.OPERATION_COPY:
    118                     Snackbars.showCopy(mActivity, docCount);
    119                     break;
    120                 case FileOperationService.OPERATION_COMPRESS:
    121                     Snackbars.showCompress(mActivity, docCount);
    122                     break;
    123                 case FileOperationService.OPERATION_EXTRACT:
    124                     Snackbars.showExtract(mActivity, docCount);
    125                     break;
    126                 case FileOperationService.OPERATION_DELETE:
    127                     Snackbars.showDelete(mActivity, docCount);
    128                     break;
    129                 default:
    130                     throw new UnsupportedOperationException("Unsupported Operation: " + opType);
    131             }
    132         }
    133 
    134         @Override
    135         public void showNoApplicationFound() {
    136             Snackbars.makeSnackbar(
    137                     mActivity, R.string.toast_no_application, Snackbar.LENGTH_SHORT).show();
    138         }
    139 
    140         @Override
    141         public void showViewInArchivesUnsupported() {
    142             Snackbars.makeSnackbar(mActivity, R.string.toast_view_in_archives_unsupported,
    143                     Snackbar.LENGTH_SHORT).show();
    144         }
    145 
    146         @Override
    147         public void showDocumentsClipped(int size) {
    148             Snackbars.showDocumentsClipped(mActivity, size);
    149         }
    150 
    151         @Override
    152         public void confirmOverwrite(FragmentManager fm, DocumentInfo overwriteTarget) {
    153             OverwriteConfirmFragment.show(fm, overwriteTarget);
    154         }
    155     }
    156 
    157     static DialogController create(Activity activity, MessageBuilder messages) {
    158         return new RuntimeDialogController(activity, messages);
    159     }
    160 }
    161