src/com/owncloud/android/ui/preview/FileDownloadFragment.java

   1 /**
   2  *   ownCloud Android client application
   3  *
   4  *   @author David A. Velasco
   5  *   Copyright (C) 2015  ownCloud Inc.
   6  *
   7  *   This program is free software: you can redistribute it and/or modify
   8  *   it under the terms of the GNU General Public License version 2,
   9  *   as published by the Free Software Foundation.
  10  *
  11  *   This program is distributed in the hope that it will be useful,
  12  *   but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  *   GNU General Public License for more details.
  15  *
  16  *   You should have received a copy of the GNU General Public License
  17  *   along with this program.  If not, see <http://www.gnu.org/licenses/>.
  18  *
  19  */
  20 package com.owncloud.android.ui.preview;
  21
  22 import java.lang.ref.WeakReference;
  23
  24 import com.owncloud.android.R;
  25 import com.owncloud.android.datamodel.OCFile;
  26 import com.owncloud.android.files.services.FileDownloader.FileDownloaderBinder;
  27 import com.owncloud.android.ui.fragment.FileFragment;
  28
  29 import android.accounts.Account;
  30 import android.os.Bundle;
  31 import android.support.v4.app.FragmentStatePagerAdapter;
  32 import android.view.LayoutInflater;
  33 import android.view.View;
  34 import android.view.View.OnClickListener;
  35 import android.view.ViewGroup;
  36 import android.widget.ImageButton;
  37 import android.widget.LinearLayout;
  38 import android.widget.ProgressBar;
  39 import android.widget.TextView;
  40
  41 import com.owncloud.android.lib.common.network.OnDatatransferProgressListener;
  42 import com.owncloud.android.lib.common.utils.Log_OC;
  43
  44
  45 /**
  46  * This Fragment is used to monitor the progress of a file downloading.
  47  */
  48 public class FileDownloadFragment extends FileFragment implements OnClickListener {
  49
  50     public static final String EXTRA_FILE = "FILE";
  51     public static final String EXTRA_ACCOUNT = "ACCOUNT";
  52     private static final String EXTRA_ERROR = "ERROR";
  53
  54     private View mView;
  55     private Account mAccount;
  56
  57     public ProgressListener mProgressListener;
  58     private boolean mListening;
  59
  60     private static final String TAG = FileDownloadFragment.class.getSimpleName();
  61
  62     private boolean mIgnoreFirstSavedState;
  63     private boolean mError;
  64
  65
  66     /**
  67      * Creates an empty details fragment.
  68      *
  69      * It's necessary to keep a public constructor without parameters; the system uses it when tries to reinstantiate a fragment automatically.
  70      */
  71     public FileDownloadFragment() {
  72         super();
  73         mAccount = null;
  74         mProgressListener = null;
  75         mListening = false;
  76         mIgnoreFirstSavedState = false;
  77         mError = false;
  78     }
  79
  80
  81     /**
  82      * Creates a details fragment.
  83      *
  84      * When 'fileToDetail' or 'ocAccount' are null, creates a dummy layout (to use when a file wasn't tapped before).
  85      *
  86      * @param fileToDetail      An {@link OCFile} to show in the fragment
  87      * @param ocAccount         An ownCloud account; needed to start downloads
  88      * @param ignoreFirstSavedState     Flag to work around an unexpected behaviour of {@link FragmentStatePagerAdapter}; TODO better solution
  89      */
  90     public FileDownloadFragment(OCFile fileToDetail, Account ocAccount, boolean ignoreFirstSavedState) {
  91         super(fileToDetail);
  92         mAccount = ocAccount;
  93         mProgressListener = null;
  94         mListening = false;
  95         mIgnoreFirstSavedState = ignoreFirstSavedState;
  96         mError = false;
  97     }
  98
  99
 100     @Override
 101     public void onCreate(Bundle savedInstanceState) {
 102         super.onCreate(savedInstanceState);
 103     }
 104
 105
 106     @Override
 107     public View onCreateView(LayoutInflater inflater, ViewGroup container,
 108             Bundle savedInstanceState) {
 109         super.onCreateView(inflater, container, savedInstanceState);
 110
 111         if (savedInstanceState != null) {
 112             if (!mIgnoreFirstSavedState) {
 113                 setFile((OCFile)savedInstanceState.getParcelable(FileDownloadFragment.EXTRA_FILE));
 114                 mAccount = savedInstanceState.getParcelable(FileDownloadFragment.EXTRA_ACCOUNT);
 115                 mError = savedInstanceState.getBoolean(FileDownloadFragment.EXTRA_ERROR);
 116             } else {
 117                 mIgnoreFirstSavedState = false;
 118             }
 119         }
 120
 121         View view = null;
 122         view = inflater.inflate(R.layout.file_download_fragment, container, false);
 123         mView = view;
 124
 125         ProgressBar progressBar = (ProgressBar)mView.findViewById(R.id.progressBar);
 126         mProgressListener = new ProgressListener(progressBar);
 127
 128         ((ImageButton)mView.findViewById(R.id.cancelBtn)).setOnClickListener(this);
 129
 130         ((LinearLayout)mView.findViewById(R.id.fileDownloadLL)).setOnClickListener(new OnClickListener() {
 131             @Override
 132             public void onClick(View v) {
 133                 ((PreviewImageActivity) getActivity()).toggleFullScreen();
 134             }
 135         });
 136
 137         if (mError) {
 138             setButtonsForRemote();
 139         } else {
 140             setButtonsForTransferring();
 141         }
 142
 143         return view;
 144     }
 145
 146
 147     @Override
 148     public void onSaveInstanceState(Bundle outState) {
 149         super.onSaveInstanceState(outState);
 150         outState.putParcelable(FileDownloadFragment.EXTRA_FILE, getFile());
 151         outState.putParcelable(FileDownloadFragment.EXTRA_ACCOUNT, mAccount);
 152         outState.putBoolean(FileDownloadFragment.EXTRA_ERROR, mError);
 153     }
 154
 155     @Override
 156     public void onStart() {
 157         super.onStart();
 158         listenForTransferProgress();
 159     }
 160
 161     @Override
 162     public void onResume() {
 163         super.onResume();
 164     }
 165
 166
 167     @Override
 168     public void onPause() {
 169         super.onPause();
 170     }
 171
 172
 173     @Override
 174     public void onStop() {
 175         leaveTransferProgress();
 176         super.onStop();
 177     }
 178
 179     @Override
 180     public void onDestroy() {
 181         super.onDestroy();
 182     }
 183
 184
 185     @Override
 186     public View getView() {
 187         if (!mListening) {
 188             listenForTransferProgress();
 189         }
 190         return super.getView() == null ? mView : super.getView();
 191     }
 192
 193
 194     @Override
 195     public void onClick(View v) {
 196         switch (v.getId()) {
 197             case R.id.cancelBtn: {
 198                 mContainerActivity.getFileOperationsHelper().cancelTransference(getFile());
 199                 getActivity().finish();
 200                 break;
 201             }
 202             default:
 203                 Log_OC.e(TAG, "Incorrect view clicked!");
 204         }
 205     }
 206
 207
 208     /**
 209      * Updates the view depending upon the state of the downloading file.
 210      *
 211      * @param   transferring    When true, the view must be updated assuming that the holded file is
 212      *                          downloading, no matter what the downloaderBinder says.
 213      */
 214     /*
 215     public void updateView(boolean transferring) {
 216         // configure UI for depending upon local state of the file
 217         // TODO remove
 218         if (transferring || getFile().isDownloading()) {
 219             setButtonsForTransferring();
 220
 221         } else if (getFile().isDown()) {
 222
 223             setButtonsForDown();
 224
 225         } else {
 226             setButtonsForRemote();
 227         }
 228         getView().invalidate();
 229
 230     }
 231     */
 232
 233     /**
 234      * Enables or disables buttons for a file being downloaded
 235      */
 236     private void setButtonsForTransferring() {
 237         getView().findViewById(R.id.cancelBtn).setVisibility(View.VISIBLE);
 238
 239         // show the progress bar for the transfer
 240         getView().findViewById(R.id.progressBar).setVisibility(View.VISIBLE);
 241         TextView progressText = (TextView)getView().findViewById(R.id.progressText);
 242         progressText.setText(R.string.downloader_download_in_progress_ticker);
 243         progressText.setVisibility(View.VISIBLE);
 244
 245         // hides the error icon
 246         getView().findViewById(R.id.errorText).setVisibility(View.GONE);
 247         getView().findViewById(R.id.error_image).setVisibility(View.GONE);
 248     }
 249
 250
 251     /**
 252      * Enables or disables buttons for a file locally available
 253      */
 254     private void setButtonsForDown() {
 255         getView().findViewById(R.id.cancelBtn).setVisibility(View.GONE);
 256
 257         // hides the progress bar
 258         getView().findViewById(R.id.progressBar).setVisibility(View.GONE);
 259
 260         // updates the text message
 261         TextView progressText = (TextView)getView().findViewById(R.id.progressText);
 262         progressText.setText(R.string.common_loading);
 263         progressText.setVisibility(View.VISIBLE);
 264
 265         // hides the error icon
 266         getView().findViewById(R.id.errorText).setVisibility(View.GONE);
 267         getView().findViewById(R.id.error_image).setVisibility(View.GONE);
 268     }
 269
 270
 271     /**
 272      * Enables or disables buttons for a file not locally available
 273      *
 274      * Currently, this is only used when a download was failed
 275      */
 276     private void setButtonsForRemote() {
 277         getView().findViewById(R.id.cancelBtn).setVisibility(View.GONE);
 278
 279         // hides the progress bar and message
 280         getView().findViewById(R.id.progressBar).setVisibility(View.GONE);
 281         getView().findViewById(R.id.progressText).setVisibility(View.GONE);
 282
 283         // shows the error icon and message
 284         getView().findViewById(R.id.errorText).setVisibility(View.VISIBLE);
 285         getView().findViewById(R.id.error_image).setVisibility(View.VISIBLE);
 286     }
 287
 288
 289     public void listenForTransferProgress() {
 290         if (mProgressListener != null && !mListening) {
 291             if (mContainerActivity.getFileDownloaderBinder() != null) {
 292                 mContainerActivity.getFileDownloaderBinder().addDatatransferProgressListener(mProgressListener, mAccount, getFile());
 293                 mListening = true;
 294                 setButtonsForTransferring();
 295             }
 296         }
 297     }
 298
 299
 300     public void leaveTransferProgress() {
 301         if (mProgressListener != null) {
 302             if (mContainerActivity.getFileDownloaderBinder() != null) {
 303                 mContainerActivity.getFileDownloaderBinder().removeDatatransferProgressListener(mProgressListener, mAccount, getFile());
 304                 mListening = false;
 305             }
 306         }
 307     }
 308
 309
 310     /**
 311      * Helper class responsible for updating the progress bar shown for file uploading or downloading
 312      */
 313     private class ProgressListener implements OnDatatransferProgressListener {
 314         int mLastPercent = 0;
 315         WeakReference<ProgressBar> mProgressBar = null;
 316
 317         ProgressListener(ProgressBar progressBar) {
 318             mProgressBar = new WeakReference<ProgressBar>(progressBar);
 319         }
 320
 321         @Override
 322         public void onTransferProgress(long progressRate, long totalTransferredSoFar, long totalToTransfer, String filename) {
 323             int percent = (int)(100.0*((double)totalTransferredSoFar)/((double)totalToTransfer));
 324             if (percent != mLastPercent) {
 325                 ProgressBar pb = mProgressBar.get();
 326                 if (pb != null) {
 327                     pb.setProgress(percent);
 328                     pb.postInvalidate();
 329                 }
 330             }
 331             mLastPercent = percent;
 332         }
 333
 334     }
 335
 336
 337     public void setError(boolean error) {
 338         mError = error;
 339     };
 340
 341
 342
 343 }