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.app.Dialog;
  20 import android.app.ProgressDialog;
  21 import android.content.BroadcastReceiver;
  22 import android.content.ComponentName;
  23 import android.content.Context;
  24 import android.content.Intent;
  25 import android.content.IntentFilter;
  26 import android.content.ServiceConnection;
  27 import android.os.Bundle;
  28 import android.os.IBinder;
  29 import android.support.v4.view.ViewPager;
  30 import android.view.MotionEvent;
  31 import android.view.View;
  32 import android.view.View.OnTouchListener;
  33
  34 import com.actionbarsherlock.app.ActionBar;
  35 import com.actionbarsherlock.view.MenuItem;
  36 import com.actionbarsherlock.view.Window;
  37 import com.owncloud.android.authentication.AccountUtils;
  38 import com.owncloud.android.datamodel.DataStorageManager;
  39 import com.owncloud.android.datamodel.FileDataStorageManager;
  40 import com.owncloud.android.datamodel.OCFile;
  41 import com.owncloud.android.files.services.FileDownloader;
  42 import com.owncloud.android.files.services.FileDownloader.FileDownloaderBinder;
  43 import com.owncloud.android.files.services.FileUploader;
  44 import com.owncloud.android.files.services.FileUploader.FileUploaderBinder;
  45 import com.owncloud.android.ui.activity.FileActivity;
  46 import com.owncloud.android.ui.activity.FileDisplayActivity;
  47 import com.owncloud.android.ui.fragment.FileFragment;
  48
  49 import com.owncloud.android.Log_OC;
  50 import com.owncloud.android.R;
  51
  52 /**
  53  *  Holds a swiping galley where image files contained in an ownCloud directory are shown
  54  *
  55  *  @author David A. Velasco
  56  */
  57 public class PreviewImageActivity extends FileActivity implements FileFragment.ContainerActivity, ViewPager.OnPageChangeListener, OnTouchListener {
  58
  59     public static final int DIALOG_SHORT_WAIT = 0;
  60
  61     public static final String TAG = PreviewImageActivity.class.getSimpleName();
  62
  63     public static final String KEY_WAITING_TO_PREVIEW = "WAITING_TO_PREVIEW";
  64     private static final String KEY_WAITING_FOR_BINDER = "WAITING_FOR_BINDER";
  65
  66     private DataStorageManager mStorageManager;
  67
  68     private ViewPager mViewPager;
  69     private PreviewImagePagerAdapter mPreviewImagePagerAdapter;
  70
  71     private FileDownloaderBinder mDownloaderBinder = null;
  72     private ServiceConnection mDownloadConnection, mUploadConnection = null;
  73     private FileUploaderBinder mUploaderBinder = null;
  74
  75     private boolean mRequestWaitingForBinder;
  76
  77     private DownloadFinishReceiver mDownloadFinishReceiver;
  78
  79     private boolean mFullScreen;
  80
  81
  82     @Override
  83     protected void onCreate(Bundle savedInstanceState) {
  84         super.onCreate(savedInstanceState);
  85
  86         requestWindowFeature(Window.FEATURE_ACTION_BAR_OVERLAY);
  87         setContentView(R.layout.preview_image_activity);
  88
  89         ActionBar actionBar = getSupportActionBar();
  90         actionBar.setDisplayHomeAsUpEnabled(true);
  91         actionBar.hide();
  92
  93         mFullScreen = true;
  94         if (savedInstanceState != null) {
  95             mRequestWaitingForBinder = savedInstanceState.getBoolean(KEY_WAITING_FOR_BINDER);
  96         } else {
  97             mRequestWaitingForBinder = false;
  98         }
  99     }
 100
 101     private void initViewPager() {
 102         OCFile parentFolder = mStorageManager.getFileById(getFile().getParentId());
 103         if (parentFolder == null) {
 104             // should not be necessary
 105             parentFolder = mStorageManager.getFileByPath(OCFile.PATH_SEPARATOR);
 106         }
 107         mPreviewImagePagerAdapter = new PreviewImagePagerAdapter(getSupportFragmentManager(), parentFolder, getAccount(), mStorageManager);
 108         mViewPager = (ViewPager) findViewById(R.id.fragmentPager);
 109         int position = mPreviewImagePagerAdapter.getFilePosition(getFile());
 110         position = (position >= 0) ? position : 0;
 111         mViewPager.setAdapter(mPreviewImagePagerAdapter);
 112         mViewPager.setOnPageChangeListener(this);
 113         mViewPager.setCurrentItem(position);
 114         if (position == 0 && !getFile().isDown()) {
 115             // this is necessary because mViewPager.setCurrentItem(0) just after setting the adapter does not result in a call to #onPageSelected(0)
 116             mRequestWaitingForBinder = true;
 117         }
 118     }
 119
 120
 121     @Override
 122     public void onStart() {
 123         super.onStart();
 124         mDownloadConnection = new PreviewImageServiceConnection();
 125         bindService(new Intent(this, FileDownloader.class), mDownloadConnection, Context.BIND_AUTO_CREATE);
 126         mUploadConnection = new PreviewImageServiceConnection();
 127         bindService(new Intent(this, FileUploader.class), mUploadConnection, Context.BIND_AUTO_CREATE);
 128     }
 129
 130     @Override
 131     protected void onSaveInstanceState(Bundle outState) {
 132         super.onSaveInstanceState(outState);
 133         outState.putBoolean(KEY_WAITING_FOR_BINDER, mRequestWaitingForBinder);
 134     }
 135
 136
 137     /** Defines callbacks for service binding, passed to bindService() */
 138     private class PreviewImageServiceConnection implements ServiceConnection {
 139
 140         @Override
 141         public void onServiceConnected(ComponentName component, IBinder service) {
 142
 143             if (component.equals(new ComponentName(PreviewImageActivity.this, FileDownloader.class))) {
 144                 mDownloaderBinder = (FileDownloaderBinder) service;
 145                 if (mRequestWaitingForBinder) {
 146                     mRequestWaitingForBinder = false;
 147                     Log_OC.d(TAG, "Simulating reselection of current page after connection of download binder");
 148                     onPageSelected(mViewPager.getCurrentItem());
 149                 }
 150
 151             } else if (component.equals(new ComponentName(PreviewImageActivity.this, FileUploader.class))) {
 152                 Log_OC.d(TAG, "Upload service connected");
 153                 mUploaderBinder = (FileUploaderBinder) service;
 154             } else {
 155                 return;
 156             }
 157
 158         }
 159
 160         @Override
 161         public void onServiceDisconnected(ComponentName component) {
 162             if (component.equals(new ComponentName(PreviewImageActivity.this, FileDownloader.class))) {
 163                 Log_OC.d(TAG, "Download service suddenly disconnected");
 164                 mDownloaderBinder = null;
 165             } else if (component.equals(new ComponentName(PreviewImageActivity.this, FileUploader.class))) {
 166                 Log_OC.d(TAG, "Upload service suddenly disconnected");
 167                 mUploaderBinder = null;
 168             }
 169         }
 170     };
 171
 172
 173     @Override
 174     public void onStop() {
 175         super.onStop();
 176         if (mDownloadConnection != null) {
 177             unbindService(mDownloadConnection);
 178             mDownloadConnection = null;
 179         }
 180         if (mUploadConnection != null) {
 181             unbindService(mUploadConnection);
 182             mUploadConnection = null;
 183         }
 184     }
 185
 186
 187     @Override
 188     public void onDestroy() {
 189         super.onDestroy();
 190     }
 191
 192
 193     @Override
 194     public boolean onOptionsItemSelected(MenuItem item) {
 195         boolean returnValue = false;
 196
 197         switch(item.getItemId()){
 198         case android.R.id.home:
 199             backToDisplayActivity();
 200             returnValue = true;
 201             break;
 202         default:
 203                 returnValue = super.onOptionsItemSelected(item);
 204         }
 205
 206         return returnValue;
 207     }
 208
 209
 210     @Override
 211     protected void onResume() {
 212         super.onResume();
 213         //Log.e(TAG, "ACTIVITY, ONRESUME");
 214         mDownloadFinishReceiver = new DownloadFinishReceiver();
 215         IntentFilter filter = new IntentFilter(FileDownloader.DOWNLOAD_FINISH_MESSAGE);
 216         filter.addAction(FileDownloader.DOWNLOAD_ADDED_MESSAGE);
 217         registerReceiver(mDownloadFinishReceiver, filter);
 218     }
 219
 220     @Override
 221     protected void onPostResume() {
 222         //Log.e(TAG, "ACTIVITY, ONPOSTRESUME");
 223         super.onPostResume();
 224     }
 225
 226     @Override
 227     public void onPause() {
 228         super.onPause();
 229         unregisterReceiver(mDownloadFinishReceiver);
 230         mDownloadFinishReceiver = null;
 231     }
 232
 233
 234     private void backToDisplayActivity() {
 235         finish();
 236     }
 237
 238
 239     @Override
 240     protected Dialog onCreateDialog(int id) {
 241         Dialog dialog = null;
 242         switch (id) {
 243         case DIALOG_SHORT_WAIT: {
 244             ProgressDialog working_dialog = new ProgressDialog(this);
 245             working_dialog.setMessage(getResources().getString(
 246                     R.string.wait_a_moment));
 247             working_dialog.setIndeterminate(true);
 248             working_dialog.setCancelable(false);
 249             dialog = working_dialog;
 250             break;
 251         }
 252         default:
 253             dialog = null;
 254         }
 255         return dialog;
 256     }
 257
 258
 259     /**
 260      * {@inheritDoc}
 261      */
 262     @Override
 263     public void onFileStateChanged() {
 264         // nothing to do here!
 265     }
 266
 267
 268     /**
 269      * {@inheritDoc}
 270      */
 271     @Override
 272     public FileDownloaderBinder getFileDownloaderBinder() {
 273         return mDownloaderBinder;
 274     }
 275
 276
 277     @Override
 278     public FileUploaderBinder getFileUploaderBinder() {
 279         return mUploaderBinder;
 280     }
 281
 282
 283     @Override
 284     public void showDetails(OCFile file) {
 285         Intent showDetailsIntent = new Intent(this, FileDisplayActivity.class);
 286         showDetailsIntent.setAction(FileDisplayActivity.ACTION_DETAILS);
 287         showDetailsIntent.putExtra(FileActivity.EXTRA_FILE, file);
 288         showDetailsIntent.putExtra(FileActivity.EXTRA_ACCOUNT, AccountUtils.getCurrentOwnCloudAccount(this));
 289         startActivity(showDetailsIntent);
 290         int pos = mPreviewImagePagerAdapter.getFilePosition(file);
 291         file = mPreviewImagePagerAdapter.getFileAt(pos);
 292
 293     }
 294
 295
 296     private void requestForDownload(OCFile file) {
 297         if (mDownloaderBinder == null) {
 298             Log_OC.d(TAG, "requestForDownload called without binder to download service");
 299
 300         } else if (!mDownloaderBinder.isDownloading(getAccount(), file)) {
 301             Intent i = new Intent(this, FileDownloader.class);
 302             i.putExtra(FileDownloader.EXTRA_ACCOUNT, getAccount());
 303             i.putExtra(FileDownloader.EXTRA_FILE, file);
 304             startService(i);
 305         }
 306     }
 307
 308     /**
 309      * This method will be invoked when a new page becomes selected. Animation is not necessarily complete.
 310      *
 311      *  @param  Position        Position index of the new selected page
 312      */
 313     @Override
 314     public void onPageSelected(int position) {
 315         if (mDownloaderBinder == null) {
 316             mRequestWaitingForBinder = true;
 317
 318         } else {
 319             OCFile currentFile = mPreviewImagePagerAdapter.getFileAt(position);
 320             getSupportActionBar().setTitle(currentFile.getFileName());
 321             if (!currentFile.isDown()) {
 322                 if (!mPreviewImagePagerAdapter.pendingErrorAt(position)) {
 323                     requestForDownload(currentFile);
 324                 }
 325             }
 326         }
 327     }
 328
 329     /**
 330      * Called when the scroll state changes. Useful for discovering when the user begins dragging,
 331      * when the pager is automatically settling to the current page. when it is fully stopped/idle.
 332      *
 333      * @param   State       The new scroll state (SCROLL_STATE_IDLE, _DRAGGING, _SETTLING
 334      */
 335     @Override
 336     public void onPageScrollStateChanged(int state) {
 337     }
 338
 339     /**
 340      * This method will be invoked when the current page is scrolled, either as part of a programmatically
 341      * initiated smooth scroll or a user initiated touch scroll.
 342      *
 343      * @param   position                Position index of the first page currently being displayed.
 344      *                                  Page position+1 will be visible if positionOffset is nonzero.
 345      *
 346      * @param   positionOffset          Value from [0, 1) indicating the offset from the page at position.
 347      * @param   positionOffsetPixels    Value in pixels indicating the offset from position.
 348      */
 349     @Override
 350     public void onPageScrolled(int position, float positionOffset, int positionOffsetPixels) {
 351     }
 352
 353
 354     /**
 355      * Class waiting for broadcast events from the {@link FielDownloader} service.
 356      *
 357      * Updates the UI when a download is started or finished, provided that it is relevant for the
 358      * folder displayed in the gallery.
 359      */
 360     private class DownloadFinishReceiver extends BroadcastReceiver {
 361         @Override
 362         public void onReceive(Context context, Intent intent) {
 363             String accountName = intent.getStringExtra(FileDownloader.ACCOUNT_NAME);
 364             String downloadedRemotePath = intent.getStringExtra(FileDownloader.EXTRA_REMOTE_PATH);
 365             if (getAccount().name.equals(accountName) &&
 366                     downloadedRemotePath != null) {
 367
 368                 OCFile file = mStorageManager.getFileByPath(downloadedRemotePath);
 369                 int position = mPreviewImagePagerAdapter.getFilePosition(file);
 370                 boolean downloadWasFine = intent.getBooleanExtra(FileDownloader.EXTRA_DOWNLOAD_RESULT, false);
 371                 //boolean isOffscreen =  Math.abs((mViewPager.getCurrentItem() - position)) <= mViewPager.getOffscreenPageLimit();
 372
 373                 if (position >= 0 && intent.getAction().equals(FileDownloader.DOWNLOAD_FINISH_MESSAGE)) {
 374                     if (downloadWasFine) {
 375                         mPreviewImagePagerAdapter.updateFile(position, file);
 376
 377                     } else {
 378                         mPreviewImagePagerAdapter.updateWithDownloadError(position);
 379                     }
 380                     mPreviewImagePagerAdapter.notifyDataSetChanged();   // will trigger the creation of new fragments
 381
 382                 } else {
 383                     Log_OC.d(TAG, "Download finished, but the fragment is offscreen");
 384                 }
 385
 386             }
 387             removeStickyBroadcast(intent);
 388         }
 389
 390     }
 391
 392
 393     @Override
 394     public boolean onTouch(View v, MotionEvent event) {
 395         if (event.getAction() == MotionEvent.ACTION_UP) {
 396            toggleFullScreen();
 397         }
 398         return true;
 399     }
 400
 401
 402     private void toggleFullScreen() {
 403         ActionBar actionBar = getSupportActionBar();
 404         if (mFullScreen) {
 405             actionBar.show();
 406
 407         } else {
 408             actionBar.hide();
 409
 410         }
 411         mFullScreen = !mFullScreen;
 412     }
 413
 414     @Override
 415     protected void onAccountSet(boolean stateWasRecovered) {
 416         if (getAccount() != null) {
 417             OCFile file = getFile();
 418             /// Validate handled file  (first image to preview)
 419             if (file == null) {
 420                 throw new IllegalStateException("Instanced with a NULL OCFile");
 421             }
 422             if (!file.isImage()) {
 423                 throw new IllegalArgumentException("Non-image file passed as argument");
 424             }
 425             mStorageManager = new FileDataStorageManager(getAccount(), getContentResolver());
 426             file = mStorageManager.getFileById(file.getFileId());
 427             if (file != null) {
 428                 /// Refresh the activity according to the Account and OCFile set
 429                 setFile(file);  // reset after getting it fresh from mStorageManager
 430                 getSupportActionBar().setTitle(getFile().getFileName());
 431                 //if (!stateWasRecovered) {
 432                     initViewPager();
 433                 //}
 434
 435             } else {
 436                 // handled file not in the current Account
 437                 finish();
 438             }
 439
 440         } else {
 441             Log_OC.wtf(TAG, "onAccountChanged was called with NULL account associated!");
 442         }
 443     }
 444
 445
 446 }