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