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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.base.Features;
     30 import com.android.documentsui.picker.OverwriteConfirmFragment;
     31 import com.android.documentsui.services.FileOperation;
     32 import com.android.documentsui.services.FileOperationService.OpType;
     33 import com.android.documentsui.services.FileOperationService;
     34 import com.android.documentsui.services.FileOperations.Callback.Status;
     35 import com.android.documentsui.services.FileOperations;
     36 
     37 import java.util.List;
     38 import javax.annotation.Nullable;
     39 
     40 public interface DialogController {
     41 
     42     // Dialogs used in FilesActivity
     43     void confirmDelete(List<DocumentInfo> docs, ConfirmationCallback callback);
     44     void showFileOperationStatus(int status, int opType, int docCount);
     45 
     46     /**
     47      * There can be only one progress dialog active at the time. Each call to this
     48      * method will discard any previously created progress dialogs.
     49      */
     50     void showProgressDialog(String jobId, FileOperation operation);
     51 
     52     void showNoApplicationFound();
     53     void showOperationUnsupported();
     54     void showViewInArchivesUnsupported();
     55     void showDocumentsClipped(int size);
     56 
     57     // Dialogs used in PickActivity
     58     void confirmOverwrite(FragmentManager fm, DocumentInfo overwriteTarget);
     59 
     60     // Should be private, but Java doesn't like me treating an interface like a mini-package.
     61     public static final class RuntimeDialogController implements DialogController {
     62 
     63         private final Activity mActivity;
     64         private final MessageBuilder mMessages;
     65         private final Features mFeatures;
     66         private OperationProgressDialog mCurrentProgressDialog = null;
     67 
     68         public RuntimeDialogController(Features features, Activity activity, MessageBuilder messages) {
     69             mFeatures = features;
     70             mActivity = activity;
     71             mMessages = messages;
     72         }
     73 
     74         @Override
     75         public void confirmDelete(List<DocumentInfo> docs, ConfirmationCallback callback) {
     76             assert(!docs.isEmpty());
     77 
     78             TextView message =
     79                     (TextView) mActivity.getLayoutInflater().inflate(
     80                             R.layout.dialog_delete_confirmation, null);
     81             message.setText(mMessages.generateDeleteMessage(docs));
     82 
     83             // For now, we implement this dialog NOT
     84             // as a fragment (which can survive rotation and have its own state),
     85             // but as a simple runtime dialog. So rotating a device with an
     86             // active delete dialog...results in that dialog disappearing.
     87             // We can do better, but don't have cycles for it now.
     88             final AlertDialog alertDialog = new AlertDialog.Builder(mActivity)
     89                     .setView(message)
     90                     .setPositiveButton(
     91                             android.R.string.ok,
     92                             new DialogInterface.OnClickListener() {
     93                                 @Override
     94                                 public void onClick(DialogInterface dialog, int id) {
     95                                     callback.accept(ConfirmationCallback.CONFIRM);
     96                                 }
     97                             })
     98                     .setNegativeButton(android.R.string.cancel, null)
     99                     .create();
    100 
    101             alertDialog.setOnShowListener(
    102                     (DialogInterface) -> {
    103                         Button positive = alertDialog.getButton(AlertDialog.BUTTON_POSITIVE);
    104                         positive.setFocusable(true);
    105                         positive.requestFocus();
    106                     });
    107             alertDialog.show();
    108         }
    109 
    110         @Override
    111         public void showFileOperationStatus(@Status int status, @OpType int opType,
    112                 int docCount) {
    113             if (status == FileOperations.Callback.STATUS_REJECTED) {
    114                 showOperationUnsupported();
    115                 return;
    116             }
    117             if (status == FileOperations.Callback.STATUS_FAILED) {
    118                 Snackbars.showOperationFailed(mActivity);
    119                 return;
    120             }
    121 
    122             if (docCount == 0) {
    123                 // Nothing has been pasted, so there is no need to show a snackbar.
    124                 return;
    125             }
    126 
    127             if (shouldShowProgressDialogForOperation(opType)) {
    128                 // The operation has a progress dialog created, so do not show a snackbar
    129                 // for operation start, as it would duplicate the UI.
    130                 return;
    131             }
    132 
    133             switch (opType) {
    134                 case FileOperationService.OPERATION_MOVE:
    135                     Snackbars.showMove(mActivity, docCount);
    136                     break;
    137                 case FileOperationService.OPERATION_COPY:
    138                     Snackbars.showCopy(mActivity, docCount);
    139                     break;
    140                 case FileOperationService.OPERATION_COMPRESS:
    141                     Snackbars.showCompress(mActivity, docCount);
    142                     break;
    143                 case FileOperationService.OPERATION_EXTRACT:
    144                     Snackbars.showExtract(mActivity, docCount);
    145                     break;
    146                 case FileOperationService.OPERATION_DELETE:
    147                     Snackbars.showDelete(mActivity, docCount);
    148                     break;
    149                 default:
    150                     throw new UnsupportedOperationException("Unsupported Operation: " + opType);
    151             }
    152         }
    153 
    154         private boolean shouldShowProgressDialogForOperation(@OpType int opType) {
    155             // TODO: Hook up progress dialog to the delete operation.
    156             if (opType == FileOperationService.OPERATION_DELETE) {
    157                 return false;
    158             }
    159 
    160             return mFeatures.isJobProgressDialogEnabled();
    161         }
    162 
    163         @Override
    164         public void showProgressDialog(String jobId, FileOperation operation) {
    165             assert(operation.getOpType() != FileOperationService.OPERATION_UNKNOWN);
    166 
    167             if (!shouldShowProgressDialogForOperation(operation.getOpType())) {
    168                 return;
    169             }
    170 
    171             if (mCurrentProgressDialog != null) {
    172                 mCurrentProgressDialog.dismiss();
    173             }
    174 
    175             mCurrentProgressDialog = OperationProgressDialog.create(mActivity, jobId, operation);
    176             mCurrentProgressDialog.show();
    177         }
    178 
    179         @Override
    180         public void showNoApplicationFound() {
    181             Snackbars.makeSnackbar(
    182                     mActivity, R.string.toast_no_application, Snackbar.LENGTH_SHORT).show();
    183         }
    184 
    185         @Override
    186         public void showOperationUnsupported() {
    187             Snackbars.showOperationRejected(mActivity);
    188         }
    189 
    190         @Override
    191         public void showViewInArchivesUnsupported() {
    192             Snackbars.makeSnackbar(mActivity, R.string.toast_view_in_archives_unsupported,
    193                     Snackbar.LENGTH_SHORT).show();
    194         }
    195 
    196         @Override
    197         public void showDocumentsClipped(int size) {
    198             Snackbars.showDocumentsClipped(mActivity, size);
    199         }
    200 
    201         @Override
    202         public void confirmOverwrite(FragmentManager fm, DocumentInfo overwriteTarget) {
    203             OverwriteConfirmFragment.show(fm, overwriteTarget);
    204         }
    205     }
    206 
    207     static DialogController create(Features features, Activity activity, MessageBuilder messages) {
    208         return new RuntimeDialogController(features, activity, messages);
    209     }
    210 }
    211