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

   1 /* ownCloud Android client application
   2  *
   3  *   Copyright (C) 2012-2013  ownCloud Inc.
   4  *
   5  *   This program is free software: you can redistribute it and/or modify
   6  *   it under the terms of the GNU General Public License version 2,
   7  *   as published by the Free Software Foundation.
   8  *
   9  *   This program is distributed in the hope that it will be useful,
  10  *   but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12  *   GNU General Public License for more details.
  13  *
  14  *   You should have received a copy of the GNU General Public License
  15  *   along with this program.  If not, see <http://www.gnu.org/licenses/>.
  16  *
  17  */
  18 package com.owncloud.android.ui.preview;
  19
  20 import java.lang.ref.WeakReference;
  21
  22 import android.accounts.Account;
  23 import android.app.Activity;
  24 import android.os.Bundle;
  25 import android.support.v4.app.FragmentStatePagerAdapter;
  26 import android.view.LayoutInflater;
  27 import android.view.View;
  28 import android.view.View.OnClickListener;
  29 import android.view.ViewGroup;
  30 import android.widget.ImageButton;
  31 import android.widget.ProgressBar;
  32 import android.widget.TextView;
  33
  34 import com.owncloud.android.datamodel.OCFile;
  35 import com.owncloud.android.files.services.FileDownloader.FileDownloaderBinder;
  36 import com.owncloud.android.ui.fragment.FileFragment;
  37
  38 import com.owncloud.android.Log_OC;
  39 import com.owncloud.android.R;
  40
  41 import eu.alefzero.webdav.OnDatatransferProgressListener;
  42
  43 /**
  44  * This Fragment is used to monitor the progress of a file downloading.
  45  *
  46  * @author David A. Velasco
  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 FileFragment.ContainerActivity mContainerActivity;
  55
  56     private View mView;
  57     private Account mAccount;
  58
  59     public ProgressListener mProgressListener;
  60     private boolean mListening;
  61
  62     private static final String TAG = FileDownloadFragment.class.getSimpleName();
  63
  64     private boolean mIgnoreFirstSavedState;
  65     private boolean mError;
  66
  67
  68     /**
  69      * Creates an empty details fragment.
  70      *
  71      * It's necessary to keep a public constructor without parameters; the system uses it when tries to reinstantiate a fragment automatically.
  72      */
  73     public FileDownloadFragment() {
  74         super();
  75         mAccount = null;
  76         mProgressListener = null;
  77         mListening = false;
  78         mIgnoreFirstSavedState = false;
  79         mError = false;
  80     }
  81
  82
  83     /**
  84      * Creates a details fragment.
  85      *
  86      * When 'fileToDetail' or 'ocAccount' are null, creates a dummy layout (to use when a file wasn't tapped before).
  87      *
  88      * @param fileToDetail      An {@link OCFile} to show in the fragment
  89      * @param ocAccount         An ownCloud account; needed to start downloads
  90      * @param ignoreFirstSavedState     Flag to work around an unexpected behaviour of {@link FragmentStatePagerAdapter}; TODO better solution
  91      */
  92     public FileDownloadFragment(OCFile fileToDetail, Account ocAccount, boolean ignoreFirstSavedState) {
  93         super(fileToDetail);
  94         mAccount = ocAccount;
  95         mProgressListener = null;
  96         mListening = false;
  97         mIgnoreFirstSavedState = ignoreFirstSavedState;
  98         mError = false;
  99     }
 100
 101
 102     @Override
 103     public void onCreate(Bundle savedInstanceState) {
 104         super.onCreate(savedInstanceState);
 105     }
 106
 107
 108     @Override
 109     public View onCreateView(LayoutInflater inflater, ViewGroup container,
 110             Bundle savedInstanceState) {
 111         super.onCreateView(inflater, container, savedInstanceState);
 112
 113         if (savedInstanceState != null) {
 114             if (!mIgnoreFirstSavedState) {
 115                 setFile((OCFile)savedInstanceState.getParcelable(FileDownloadFragment.EXTRA_FILE));
 116                 mAccount = savedInstanceState.getParcelable(FileDownloadFragment.EXTRA_ACCOUNT);
 117                 mError = savedInstanceState.getBoolean(FileDownloadFragment.EXTRA_ERROR);
 118             } else {
 119                 mIgnoreFirstSavedState = false;
 120             }
 121         }
 122
 123         View view = null;
 124         view = inflater.inflate(R.layout.file_download_fragment, container, false);
 125         mView = view;
 126
 127         ProgressBar progressBar = (ProgressBar)mView.findViewById(R.id.progressBar);
 128         mProgressListener = new ProgressListener(progressBar);
 129
 130         ((ImageButton)mView.findViewById(R.id.cancelBtn)).setOnClickListener(this);
 131
 132         if (mError) {
 133             setButtonsForRemote();
 134         } else {
 135             setButtonsForTransferring();
 136         }
 137
 138         return view;
 139     }
 140
 141
 142     /**
 143      * {@inheritDoc}
 144      */
 145     @Override
 146     public void onAttach(Activity activity) {
 147         super.onAttach(activity);
 148         try {
 149             mContainerActivity = (ContainerActivity) activity;
 150
 151         } catch (ClassCastException e) {
 152             throw new ClassCastException(activity.toString() + " must implement " + FileFragment.ContainerActivity.class.getSimpleName());
 153         }
 154     }
 155
 156
 157     /**
 158      * {@inheritDoc}
 159      */
 160     @Override
 161     public void onActivityCreated(Bundle savedInstanceState) {
 162         super.onActivityCreated(savedInstanceState);
 163         if (mAccount != null) {
 164             //mStorageManager = new FileDataStorageManager(mAccount, getActivity().getApplicationContext().getContentResolver());;
 165         }
 166     }
 167
 168
 169     @Override
 170     public void onSaveInstanceState(Bundle outState) {
 171         super.onSaveInstanceState(outState);
 172         outState.putParcelable(FileDownloadFragment.EXTRA_FILE, getFile());
 173         outState.putParcelable(FileDownloadFragment.EXTRA_ACCOUNT, mAccount);
 174         outState.putBoolean(FileDownloadFragment.EXTRA_ERROR, mError);
 175     }
 176
 177     @Override
 178     public void onStart() {
 179         super.onStart();
 180         listenForTransferProgress();
 181     }
 182
 183     @Override
 184     public void onResume() {
 185         super.onResume();
 186     }
 187
 188
 189     @Override
 190     public void onPause() {
 191         super.onPause();
 192     }
 193
 194
 195     @Override
 196     public void onStop() {
 197         super.onStop();
 198         leaveTransferProgress();
 199     }
 200
 201     @Override
 202     public void onDestroy() {
 203         super.onDestroy();
 204     }
 205
 206
 207     @Override
 208     public View getView() {
 209         if (!mListening) {
 210             listenForTransferProgress();
 211         }
 212         return super.getView() == null ? mView : super.getView();
 213     }
 214
 215
 216     @Override
 217     public void onClick(View v) {
 218         switch (v.getId()) {
 219             case R.id.cancelBtn: {
 220                 FileDownloaderBinder downloaderBinder = mContainerActivity.getFileDownloaderBinder();
 221                 if (downloaderBinder != null && downloaderBinder.isDownloading(mAccount, getFile())) {
 222                     downloaderBinder.cancel(mAccount, getFile());
 223                     getActivity().finish(); // :)
 224                     /*
 225                     leaveTransferProgress();
 226                     if (mFile.isDown()) {
 227                         setButtonsForDown();
 228                     } else {
 229                         setButtonsForRemote();
 230                     }
 231                     */
 232                 }
 233                 break;
 234             }
 235             default:
 236                 Log_OC.e(TAG, "Incorrect view clicked!");
 237         }
 238     }
 239
 240
 241     /**
 242      * Updates the view depending upon the state of the downloading file.
 243      *
 244      * @param   transferring    When true, the view must be updated assuming that the holded file is
 245      *                          downloading, no matter what the downloaderBinder says.
 246      */
 247     public void updateView(boolean transferring) {
 248         // configure UI for depending upon local state of the file
 249         FileDownloaderBinder downloaderBinder = (mContainerActivity == null) ? null : mContainerActivity.getFileDownloaderBinder();
 250         if (transferring || (downloaderBinder != null && downloaderBinder.isDownloading(mAccount, getFile()))) {
 251             setButtonsForTransferring();
 252
 253         } else if (getFile().isDown()) {
 254
 255             setButtonsForDown();
 256
 257         } else {
 258             setButtonsForRemote();
 259         }
 260         getView().invalidate();
 261
 262     }
 263
 264
 265     /**
 266      * Enables or disables buttons for a file being downloaded
 267      */
 268     private void setButtonsForTransferring() {
 269         getView().findViewById(R.id.cancelBtn).setVisibility(View.VISIBLE);
 270
 271         // show the progress bar for the transfer
 272         getView().findViewById(R.id.progressBar).setVisibility(View.VISIBLE);
 273         TextView progressText = (TextView)getView().findViewById(R.id.progressText);
 274         progressText.setText(R.string.downloader_download_in_progress_ticker);
 275         progressText.setVisibility(View.VISIBLE);
 276
 277         // hides the error icon
 278         getView().findViewById(R.id.errorText).setVisibility(View.GONE);
 279         getView().findViewById(R.id.error_image).setVisibility(View.GONE);
 280     }
 281
 282
 283     /**
 284      * Enables or disables buttons for a file locally available
 285      */
 286     private void setButtonsForDown() {
 287         getView().findViewById(R.id.cancelBtn).setVisibility(View.GONE);
 288
 289         // hides the progress bar
 290         getView().findViewById(R.id.progressBar).setVisibility(View.GONE);
 291
 292         // updates the text message
 293         TextView progressText = (TextView)getView().findViewById(R.id.progressText);
 294         progressText.setText(R.string.common_loading);
 295         progressText.setVisibility(View.VISIBLE);
 296
 297         // hides the error icon
 298         getView().findViewById(R.id.errorText).setVisibility(View.GONE);
 299         getView().findViewById(R.id.error_image).setVisibility(View.GONE);
 300     }
 301
 302
 303     /**
 304      * Enables or disables buttons for a file not locally available
 305      *
 306      * Currently, this is only used when a download was failed
 307      */
 308     private void setButtonsForRemote() {
 309         getView().findViewById(R.id.cancelBtn).setVisibility(View.GONE);
 310
 311         // hides the progress bar and message
 312         getView().findViewById(R.id.progressBar).setVisibility(View.GONE);
 313         getView().findViewById(R.id.progressText).setVisibility(View.GONE);
 314
 315         // shows the error icon and message
 316         getView().findViewById(R.id.errorText).setVisibility(View.VISIBLE);
 317         getView().findViewById(R.id.error_image).setVisibility(View.VISIBLE);
 318     }
 319
 320
 321     public void listenForTransferProgress() {
 322         if (mProgressListener != null && !mListening) {
 323             if (mContainerActivity.getFileDownloaderBinder() != null) {
 324                 mContainerActivity.getFileDownloaderBinder().addDatatransferProgressListener(mProgressListener, mAccount, getFile());
 325                 mListening = true;
 326                 setButtonsForTransferring();
 327             }
 328         }
 329     }
 330
 331
 332     public void leaveTransferProgress() {
 333         if (mProgressListener != null) {
 334             if (mContainerActivity.getFileDownloaderBinder() != null) {
 335                 mContainerActivity.getFileDownloaderBinder().removeDatatransferProgressListener(mProgressListener, mAccount, getFile());
 336                 mListening = false;
 337             }
 338         }
 339     }
 340
 341
 342     /**
 343      * Helper class responsible for updating the progress bar shown for file uploading or downloading
 344      *
 345      * @author David A. Velasco
 346      */
 347     private class ProgressListener implements OnDatatransferProgressListener {
 348         int mLastPercent = 0;
 349         WeakReference<ProgressBar> mProgressBar = null;
 350
 351         ProgressListener(ProgressBar progressBar) {
 352             mProgressBar = new WeakReference<ProgressBar>(progressBar);
 353         }
 354
 355         @Override
 356         public void onTransferProgress(long progressRate) {
 357             // old method, nothing here
 358         };
 359
 360         @Override
 361         public void onTransferProgress(long progressRate, long totalTransferredSoFar, long totalToTransfer, String filename) {
 362             int percent = (int)(100.0*((double)totalTransferredSoFar)/((double)totalToTransfer));
 363             if (percent != mLastPercent) {
 364                 ProgressBar pb = mProgressBar.get();
 365                 if (pb != null) {
 366                     pb.setProgress(percent);
 367                     pb.postInvalidate();
 368                 }
 369             }
 370             mLastPercent = percent;
 371         }
 372
 373     }
 374
 375
 376     public void setError(boolean error) {
 377         mError = error;
 378     };
 379
 380
 381
 382 }