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

   1 /* ownCloud Android client application
   2  *   Copyright (C) 2012-2013  ownCloud Inc.
   3  *
   4  *   This program is free software: you can redistribute it and/or modify
   5  *   it under the terms of the GNU General Public License version 2,
   6  *   as published by the Free Software Foundation.
   7  *
   8  *   This program is distributed in the hope that it will be useful,
   9  *   but WITHOUT ANY WARRANTY; without even the implied warranty of
  10  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  11  *   GNU General Public License for more details.
  12  *
  13  *   You should have received a copy of the GNU General Public License
  14  *   along with this program.  If not, see <http://www.gnu.org/licenses/>.
  15  *
  16  */
  17 package com.owncloud.android.ui.preview;
  18
  19 import android.accounts.Account;
  20 import android.app.Dialog;
  21 import android.app.ProgressDialog;
  22 import android.content.BroadcastReceiver;
  23 import android.content.ComponentName;
  24 import android.content.Context;
  25 import android.content.Intent;
  26 import android.content.IntentFilter;
  27 import android.content.ServiceConnection;
  28 import android.os.Bundle;
  29 import android.os.IBinder;
  30 import android.support.v4.view.ViewPager;
  31 import android.view.MotionEvent;
  32 import android.view.View;
  33 import android.view.View.OnTouchListener;
  34
  35 import com.actionbarsherlock.app.ActionBar;
  36 import com.actionbarsherlock.app.SherlockFragmentActivity;
  37 import com.actionbarsherlock.view.MenuItem;
  38 import com.actionbarsherlock.view.Window;
  39 import com.owncloud.android.authentication.AccountUtils;
  40 import com.owncloud.android.datamodel.DataStorageManager;
  41 import com.owncloud.android.datamodel.FileDataStorageManager;
  42 import com.owncloud.android.datamodel.OCFile;
  43 import com.owncloud.android.files.services.FileDownloader;
  44 import com.owncloud.android.files.services.FileDownloader.FileDownloaderBinder;
  45 import com.owncloud.android.files.services.FileUploader;
  46 import com.owncloud.android.files.services.FileUploader.FileUploaderBinder;
  47 import com.owncloud.android.ui.activity.FileActivity;
  48 import com.owncloud.android.ui.activity.FileDisplayActivity;
  49 import com.owncloud.android.ui.fragment.FileFragment;
  50
  51 import com.owncloud.android.Log_OC;
  52 import com.owncloud.android.R;
  53
  54 /**
  55  *  Used as an utility to preview image files contained in an ownCloud account.
  56  *
  57  *  @author David A. Velasco
  58  */
  59 public class PreviewImageActivity extends FileActivity implements FileFragment.ContainerActivity, ViewPager.OnPageChangeListener, OnTouchListener {
  60
  61     public static final int DIALOG_SHORT_WAIT = 0;
  62
  63     public static final String TAG = PreviewImageActivity.class.getSimpleName();
  64
  65     public static final String KEY_WAITING_TO_PREVIEW = "WAITING_TO_PREVIEW";
  66     private static final String KEY_WAITING_FOR_BINDER = "WAITING_FOR_BINDER";
  67
  68     private OCFile mFile;
  69     private OCFile mParentFolder;
  70     private Account mAccount;
  71     private DataStorageManager mStorageManager;
  72
  73     private ViewPager mViewPager;
  74     private PreviewImagePagerAdapter mPreviewImagePagerAdapter;
  75
  76     private FileDownloaderBinder mDownloaderBinder = null;
  77     private ServiceConnection mDownloadConnection, mUploadConnection = null;
  78     private FileUploaderBinder mUploaderBinder = null;
  79
  80     private boolean mRequestWaitingForBinder;
  81
  82     private DownloadFinishReceiver mDownloadFinishReceiver;
  83
  84     private boolean mFullScreen;
  85
  86
  87     @Override
  88     protected void onCreate(Bundle savedInstanceState) {
  89         super.onCreate(savedInstanceState);
  90
  91         mFile = getIntent().getParcelableExtra(FileActivity.EXTRA_FILE);
  92         mAccount = getIntent().getParcelableExtra(FileActivity.EXTRA_ACCOUNT);
  93         if (mFile == null) {
  94             throw new IllegalStateException("Instanced with a NULL OCFile");
  95         }
  96         if (mAccount == null) {
  97             throw new IllegalStateException("Instanced with a NULL ownCloud Account");
  98         }
  99         if (!mFile.isImage()) {
 100             throw new IllegalArgumentException("Non-image file passed as argument");
 101         }
 102         requestWindowFeature(Window.FEATURE_ACTION_BAR_OVERLAY);
 103         setContentView(R.layout.preview_image_activity);
 104
 105         ActionBar actionBar = getSupportActionBar();
 106         actionBar.setDisplayHomeAsUpEnabled(true);
 107         actionBar.setTitle(mFile.getFileName());
 108         actionBar.hide();
 109
 110         mFullScreen = true;
 111
 112         mStorageManager = new FileDataStorageManager(mAccount, getContentResolver());
 113         mParentFolder = mStorageManager.getFileById(mFile.getParentId());
 114         if (mParentFolder == null) {
 115             // should not be necessary
 116             mParentFolder = mStorageManager.getFileByPath(OCFile.PATH_SEPARATOR);
 117         }
 118
 119         if (savedInstanceState != null) {
 120             mRequestWaitingForBinder = savedInstanceState.getBoolean(KEY_WAITING_FOR_BINDER);
 121         } else {
 122             mRequestWaitingForBinder = false;
 123         }
 124
 125         createViewPager();
 126
 127     }
 128
 129     private void createViewPager() {
 130         mPreviewImagePagerAdapter = new PreviewImagePagerAdapter(getSupportFragmentManager(), mParentFolder, mAccount, mStorageManager);
 131         mViewPager = (ViewPager) findViewById(R.id.fragmentPager);
 132         int position = mPreviewImagePagerAdapter.getFilePosition(mFile);
 133         position = (position >= 0) ? position : 0;
 134         mViewPager.setAdapter(mPreviewImagePagerAdapter);
 135         mViewPager.setOnPageChangeListener(this);
 136         mViewPager.setCurrentItem(position);
 137         if (position == 0 && !mFile.isDown()) {
 138             // this is necessary because mViewPager.setCurrentItem(0) just after setting the adapter does not result in a call to #onPageSelected(0)
 139             mRequestWaitingForBinder = true;
 140         }
 141     }
 142
 143
 144     @Override
 145     public void onStart() {
 146         super.onStart();
 147         mDownloadConnection = new PreviewImageServiceConnection();
 148         bindService(new Intent(this, FileDownloader.class), mDownloadConnection, Context.BIND_AUTO_CREATE);
 149         mUploadConnection = new PreviewImageServiceConnection();
 150         bindService(new Intent(this, FileUploader.class), mUploadConnection, Context.BIND_AUTO_CREATE);
 151     }
 152
 153     @Override
 154     protected void onSaveInstanceState(Bundle outState) {
 155         super.onSaveInstanceState(outState);
 156         outState.putBoolean(KEY_WAITING_FOR_BINDER, mRequestWaitingForBinder);
 157     }
 158
 159
 160     /** Defines callbacks for service binding, passed to bindService() */
 161     private class PreviewImageServiceConnection implements ServiceConnection {
 162
 163         @Override
 164         public void onServiceConnected(ComponentName component, IBinder service) {
 165
 166             if (component.equals(new ComponentName(PreviewImageActivity.this, FileDownloader.class))) {
 167                 mDownloaderBinder = (FileDownloaderBinder) service;
 168                 if (mRequestWaitingForBinder) {
 169                     mRequestWaitingForBinder = false;
 170                     Log_OC.d(TAG, "Simulating reselection of current page after connection of download binder");
 171                     onPageSelected(mViewPager.getCurrentItem());
 172                 }
 173
 174             } else if (component.equals(new ComponentName(PreviewImageActivity.this, FileUploader.class))) {
 175                 Log_OC.d(TAG, "Upload service connected");
 176                 mUploaderBinder = (FileUploaderBinder) service;
 177             } else {
 178                 return;
 179             }
 180
 181         }
 182
 183         @Override
 184         public void onServiceDisconnected(ComponentName component) {
 185             if (component.equals(new ComponentName(PreviewImageActivity.this, FileDownloader.class))) {
 186                 Log_OC.d(TAG, "Download service suddenly disconnected");
 187                 mDownloaderBinder = null;
 188             } else if (component.equals(new ComponentName(PreviewImageActivity.this, FileUploader.class))) {
 189                 Log_OC.d(TAG, "Upload service suddenly disconnected");
 190                 mUploaderBinder = null;
 191             }
 192         }
 193     };
 194
 195
 196     @Override
 197     public void onStop() {
 198         super.onStop();
 199         if (mDownloadConnection != null) {
 200             unbindService(mDownloadConnection);
 201             mDownloadConnection = null;
 202         }
 203         if (mUploadConnection != null) {
 204             unbindService(mUploadConnection);
 205             mUploadConnection = null;
 206         }
 207     }
 208
 209
 210     @Override
 211     public void onDestroy() {
 212         super.onDestroy();
 213     }
 214
 215
 216     @Override
 217     public boolean onOptionsItemSelected(MenuItem item) {
 218         boolean returnValue = false;
 219
 220         switch(item.getItemId()){
 221         case android.R.id.home:
 222             backToDisplayActivity();
 223             returnValue = true;
 224             break;
 225         default:
 226                 returnValue = super.onOptionsItemSelected(item);
 227         }
 228
 229         return returnValue;
 230     }
 231
 232
 233     @Override
 234     protected void onResume() {
 235         super.onResume();
 236         //Log.e(TAG, "ACTIVITY, ONRESUME");
 237         mDownloadFinishReceiver = new DownloadFinishReceiver();
 238         IntentFilter filter = new IntentFilter(FileDownloader.DOWNLOAD_FINISH_MESSAGE);
 239         filter.addAction(FileDownloader.DOWNLOAD_ADDED_MESSAGE);
 240         registerReceiver(mDownloadFinishReceiver, filter);
 241     }
 242
 243     @Override
 244     protected void onPostResume() {
 245         //Log.e(TAG, "ACTIVITY, ONPOSTRESUME");
 246         super.onPostResume();
 247     }
 248
 249     @Override
 250     public void onPause() {
 251         super.onPause();
 252         unregisterReceiver(mDownloadFinishReceiver);
 253         mDownloadFinishReceiver = null;
 254     }
 255
 256
 257     private void backToDisplayActivity() {
 258         finish();
 259     }
 260
 261
 262     @Override
 263     protected Dialog onCreateDialog(int id) {
 264         Dialog dialog = null;
 265         switch (id) {
 266         case DIALOG_SHORT_WAIT: {
 267             ProgressDialog working_dialog = new ProgressDialog(this);
 268             working_dialog.setMessage(getResources().getString(
 269                     R.string.wait_a_moment));
 270             working_dialog.setIndeterminate(true);
 271             working_dialog.setCancelable(false);
 272             dialog = working_dialog;
 273             break;
 274         }
 275         default:
 276             dialog = null;
 277         }
 278         return dialog;
 279     }
 280
 281
 282     /**
 283      * {@inheritDoc}
 284      */
 285     @Override
 286     public void onFileStateChanged() {
 287         // nothing to do here!
 288     }
 289
 290
 291     /**
 292      * {@inheritDoc}
 293      */
 294     @Override
 295     public FileDownloaderBinder getFileDownloaderBinder() {
 296         return mDownloaderBinder;
 297     }
 298
 299
 300     @Override
 301     public FileUploaderBinder getFileUploaderBinder() {
 302         return mUploaderBinder;
 303     }
 304
 305
 306     @Override
 307     public void showDetails(OCFile file) {
 308         Intent showDetailsIntent = new Intent(this, FileDisplayActivity.class);
 309         showDetailsIntent.setAction(FileDisplayActivity.ACTION_DETAILS);
 310         showDetailsIntent.putExtra(FileActivity.EXTRA_FILE, file);
 311         showDetailsIntent.putExtra(FileActivity.EXTRA_ACCOUNT, AccountUtils.getCurrentOwnCloudAccount(this));
 312         startActivity(showDetailsIntent);
 313         int pos = mPreviewImagePagerAdapter.getFilePosition(file);
 314         file = mPreviewImagePagerAdapter.getFileAt(pos);
 315
 316     }
 317
 318
 319     private void requestForDownload(OCFile file) {
 320         if (mDownloaderBinder == null) {
 321             Log_OC.d(TAG, "requestForDownload called without binder to download service");
 322
 323         } else if (!mDownloaderBinder.isDownloading(mAccount, file)) {
 324             Intent i = new Intent(this, FileDownloader.class);
 325             i.putExtra(FileDownloader.EXTRA_ACCOUNT, mAccount);
 326             i.putExtra(FileDownloader.EXTRA_FILE, file);
 327             startService(i);
 328         }
 329     }
 330
 331     /**
 332      * This method will be invoked when a new page becomes selected. Animation is not necessarily complete.
 333      *
 334      *  @param  Position        Position index of the new selected page
 335      */
 336     @Override
 337     public void onPageSelected(int position) {
 338         if (mDownloaderBinder == null) {
 339             mRequestWaitingForBinder = true;
 340
 341         } else {
 342             OCFile currentFile = mPreviewImagePagerAdapter.getFileAt(position);
 343             getSupportActionBar().setTitle(currentFile.getFileName());
 344             if (!currentFile.isDown()) {
 345                 if (!mPreviewImagePagerAdapter.pendingErrorAt(position)) {
 346                     requestForDownload(currentFile);
 347                 }
 348             }
 349         }
 350     }
 351
 352     /**
 353      * Called when the scroll state changes. Useful for discovering when the user begins dragging,
 354      * when the pager is automatically settling to the current page. when it is fully stopped/idle.
 355      *
 356      * @param   State       The new scroll state (SCROLL_STATE_IDLE, _DRAGGING, _SETTLING
 357      */
 358     @Override
 359     public void onPageScrollStateChanged(int state) {
 360     }
 361
 362     /**
 363      * This method will be invoked when the current page is scrolled, either as part of a programmatically
 364      * initiated smooth scroll or a user initiated touch scroll.
 365      *
 366      * @param   position                Position index of the first page currently being displayed.
 367      *                                  Page position+1 will be visible if positionOffset is nonzero.
 368      *
 369      * @param   positionOffset          Value from [0, 1) indicating the offset from the page at position.
 370      * @param   positionOffsetPixels    Value in pixels indicating the offset from position.
 371      */
 372     @Override
 373     public void onPageScrolled(int position, float positionOffset, int positionOffsetPixels) {
 374     }
 375
 376
 377     /**
 378      * Class waiting for broadcast events from the {@link FielDownloader} service.
 379      *
 380      * Updates the UI when a download is started or finished, provided that it is relevant for the
 381      * folder displayed in the gallery.
 382      */
 383     private class DownloadFinishReceiver extends BroadcastReceiver {
 384         @Override
 385         public void onReceive(Context context, Intent intent) {
 386             String accountName = intent.getStringExtra(FileDownloader.ACCOUNT_NAME);
 387             String downloadedRemotePath = intent.getStringExtra(FileDownloader.EXTRA_REMOTE_PATH);
 388             if (mAccount.name.equals(accountName) &&
 389                     downloadedRemotePath != null) {
 390
 391                 OCFile file = mStorageManager.getFileByPath(downloadedRemotePath);
 392                 int position = mPreviewImagePagerAdapter.getFilePosition(file);
 393                 boolean downloadWasFine = intent.getBooleanExtra(FileDownloader.EXTRA_DOWNLOAD_RESULT, false);
 394                 //boolean isOffscreen =  Math.abs((mViewPager.getCurrentItem() - position)) <= mViewPager.getOffscreenPageLimit();
 395
 396                 if (position >= 0 && intent.getAction().equals(FileDownloader.DOWNLOAD_FINISH_MESSAGE)) {
 397                     if (downloadWasFine) {
 398                         mPreviewImagePagerAdapter.updateFile(position, file);
 399
 400                     } else {
 401                         mPreviewImagePagerAdapter.updateWithDownloadError(position);
 402                     }
 403                     mPreviewImagePagerAdapter.notifyDataSetChanged();   // will trigger the creation of new fragments
 404
 405                 } else {
 406                     Log_OC.d(TAG, "Download finished, but the fragment is offscreen");
 407                 }
 408
 409             }
 410             removeStickyBroadcast(intent);
 411         }
 412
 413     }
 414
 415
 416     @Override
 417     public boolean onTouch(View v, MotionEvent event) {
 418         if (event.getAction() == MotionEvent.ACTION_UP) {
 419            toggleFullScreen();
 420         }
 421         return true;
 422     }
 423
 424
 425     private void toggleFullScreen() {
 426         ActionBar actionBar = getSupportActionBar();
 427         if (mFullScreen) {
 428             actionBar.show();
 429
 430         } else {
 431             actionBar.hide();
 432
 433         }
 434         mFullScreen = !mFullScreen;
 435     }
 436
 437     @Override
 438     protected void onAccountSet(boolean stateWasRecovered) {
 439         // TODO
 440     }
 441
 442
 443 }