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.content.BroadcastReceiver;
  20 import android.content.ComponentName;
  21 import android.content.Context;
  22 import android.content.Intent;
  23 import android.content.IntentFilter;
  24 import android.content.ServiceConnection;
  25 import android.os.Bundle;
  26 import android.os.IBinder;
  27 import android.support.v4.app.Fragment;
  28 import android.support.v4.app.FragmentManager;
  29 import android.support.v4.app.FragmentTransaction;
  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.view.MenuItem;
  37 import com.actionbarsherlock.view.Window;
  38 import com.owncloud.android.authentication.AccountUtils;
  39 import com.owncloud.android.datamodel.DataStorageManager;
  40 import com.owncloud.android.datamodel.FileDataStorageManager;
  41 import com.owncloud.android.datamodel.OCFile;
  42 import com.owncloud.android.files.services.FileDownloader;
  43 import com.owncloud.android.files.services.FileDownloader.FileDownloaderBinder;
  44 import com.owncloud.android.files.services.FileUploader;
  45 import com.owncloud.android.files.services.FileUploader.FileUploaderBinder;
  46 import com.owncloud.android.ui.activity.FileActivity;
  47 import com.owncloud.android.ui.activity.FileDisplayActivity;
  48 import com.owncloud.android.ui.dialog.LoadingDialog;
  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  *  Holds a swiping galley where image files contained in an ownCloud directory are shown
  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 static final String DIALOG_WAIT_TAG = "DIALOG_WAIT";
  69
  70     private DataStorageManager mStorageManager;
  71
  72     private ViewPager mViewPager;
  73     private PreviewImagePagerAdapter mPreviewImagePagerAdapter;
  74
  75     private FileDownloaderBinder mDownloaderBinder = null;
  76     private ServiceConnection mDownloadConnection, mUploadConnection = null;
  77     private FileUploaderBinder mUploaderBinder = null;
  78
  79     private boolean mRequestWaitingForBinder;
  80
  81     private DownloadFinishReceiver mDownloadFinishReceiver;
  82
  83     private boolean mFullScreen;
  84
  85     private String mDownloadAddedMessage;
  86     private String mDownloadFinishMessage;
  87
  88
  89     @Override
  90     protected void onCreate(Bundle savedInstanceState) {
  91         super.onCreate(savedInstanceState);
  92
  93         requestWindowFeature(Window.FEATURE_ACTION_BAR_OVERLAY);
  94         setContentView(R.layout.preview_image_activity);
  95
  96         ActionBar actionBar = getSupportActionBar();
  97         actionBar.setDisplayHomeAsUpEnabled(true);
  98         actionBar.hide();
  99
 100         mFullScreen = true;
 101         if (savedInstanceState != null) {
 102             mRequestWaitingForBinder = savedInstanceState.getBoolean(KEY_WAITING_FOR_BINDER);
 103         } else {
 104             mRequestWaitingForBinder = false;
 105         }
 106
 107         FileDownloader downloader = new FileDownloader();
 108         mDownloadAddedMessage = downloader.getDownloadAddedMessage();
 109         mDownloadFinishMessage= downloader.getDownloadFinishMessage();
 110     }
 111
 112     private void initViewPager() {
 113         OCFile parentFolder = mStorageManager.getFileById(getFile().getParentId());
 114         if (parentFolder == null) {
 115             // should not be necessary
 116             parentFolder = mStorageManager.getFileByPath(OCFile.PATH_SEPARATOR);
 117         }
 118         mPreviewImagePagerAdapter = new PreviewImagePagerAdapter(getSupportFragmentManager(), parentFolder, getAccount(), mStorageManager);
 119         mViewPager = (ViewPager) findViewById(R.id.fragmentPager);
 120         int position = mPreviewImagePagerAdapter.getFilePosition(getFile());
 121         position = (position >= 0) ? position : 0;
 122         mViewPager.setAdapter(mPreviewImagePagerAdapter);
 123         mViewPager.setOnPageChangeListener(this);
 124         mViewPager.setCurrentItem(position);
 125         if (position == 0 && !getFile().isDown()) {
 126             // this is necessary because mViewPager.setCurrentItem(0) just after setting the adapter does not result in a call to #onPageSelected(0)
 127             mRequestWaitingForBinder = true;
 128         }
 129     }
 130
 131
 132     @Override
 133     public void onStart() {
 134         super.onStart();
 135         mDownloadConnection = new PreviewImageServiceConnection();
 136         bindService(new Intent(this, FileDownloader.class), mDownloadConnection, Context.BIND_AUTO_CREATE);
 137         mUploadConnection = new PreviewImageServiceConnection();
 138         bindService(new Intent(this, FileUploader.class), mUploadConnection, Context.BIND_AUTO_CREATE);
 139     }
 140
 141     @Override
 142     protected void onSaveInstanceState(Bundle outState) {
 143         super.onSaveInstanceState(outState);
 144         outState.putBoolean(KEY_WAITING_FOR_BINDER, mRequestWaitingForBinder);
 145     }
 146
 147
 148     /** Defines callbacks for service binding, passed to bindService() */
 149     private class PreviewImageServiceConnection implements ServiceConnection {
 150
 151         @Override
 152         public void onServiceConnected(ComponentName component, IBinder service) {
 153
 154             if (component.equals(new ComponentName(PreviewImageActivity.this, FileDownloader.class))) {
 155                 mDownloaderBinder = (FileDownloaderBinder) service;
 156                 if (mRequestWaitingForBinder) {
 157                     mRequestWaitingForBinder = false;
 158                     Log_OC.d(TAG, "Simulating reselection of current page after connection of download binder");
 159                     onPageSelected(mViewPager.getCurrentItem());
 160                 }
 161
 162             } else if (component.equals(new ComponentName(PreviewImageActivity.this, FileUploader.class))) {
 163                 Log_OC.d(TAG, "Upload service connected");
 164                 mUploaderBinder = (FileUploaderBinder) service;
 165             } else {
 166                 return;
 167             }
 168
 169         }
 170
 171         @Override
 172         public void onServiceDisconnected(ComponentName component) {
 173             if (component.equals(new ComponentName(PreviewImageActivity.this, FileDownloader.class))) {
 174                 Log_OC.d(TAG, "Download service suddenly disconnected");
 175                 mDownloaderBinder = null;
 176             } else if (component.equals(new ComponentName(PreviewImageActivity.this, FileUploader.class))) {
 177                 Log_OC.d(TAG, "Upload service suddenly disconnected");
 178                 mUploaderBinder = null;
 179             }
 180         }
 181     };
 182
 183
 184     @Override
 185     public void onStop() {
 186         super.onStop();
 187         if (mDownloadConnection != null) {
 188             unbindService(mDownloadConnection);
 189             mDownloadConnection = null;
 190         }
 191         if (mUploadConnection != null) {
 192             unbindService(mUploadConnection);
 193             mUploadConnection = null;
 194         }
 195     }
 196
 197
 198     @Override
 199     public void onDestroy() {
 200         super.onDestroy();
 201     }
 202
 203
 204     @Override
 205     public boolean onOptionsItemSelected(MenuItem item) {
 206         boolean returnValue = false;
 207
 208         switch(item.getItemId()){
 209         case android.R.id.home:
 210             backToDisplayActivity();
 211             returnValue = true;
 212             break;
 213         default:
 214                 returnValue = super.onOptionsItemSelected(item);
 215         }
 216
 217         return returnValue;
 218     }
 219
 220
 221     @Override
 222     protected void onResume() {
 223         super.onResume();
 224         //Log.e(TAG, "ACTIVITY, ONRESUME");
 225         mDownloadFinishReceiver = new DownloadFinishReceiver();
 226
 227         IntentFilter filter = new IntentFilter(mDownloadFinishMessage);
 228         filter.addAction(mDownloadAddedMessage);
 229         registerReceiver(mDownloadFinishReceiver, filter);
 230     }
 231
 232     @Override
 233     protected void onPostResume() {
 234         //Log.e(TAG, "ACTIVITY, ONPOSTRESUME");
 235         super.onPostResume();
 236     }
 237
 238     @Override
 239     public void onPause() {
 240         super.onPause();
 241         unregisterReceiver(mDownloadFinishReceiver);
 242         mDownloadFinishReceiver = null;
 243     }
 244
 245
 246     private void backToDisplayActivity() {
 247         finish();
 248     }
 249
 250     /**
 251      * Show loading dialog
 252      */
 253     public void showLoadingDialog() {
 254         // Construct dialog
 255         LoadingDialog loading = new LoadingDialog(getResources().getString(R.string.wait_a_moment));
 256         FragmentManager fm = getSupportFragmentManager();
 257         FragmentTransaction ft = fm.beginTransaction();
 258         loading.show(ft, DIALOG_WAIT_TAG);
 259
 260     }
 261
 262     /**
 263      * Dismiss loading dialog
 264      */
 265     public void dismissLoadingDialog(){
 266         Fragment frag = getSupportFragmentManager().findFragmentByTag(DIALOG_WAIT_TAG);
 267       if (frag != null) {
 268           LoadingDialog loading = (LoadingDialog) frag;
 269             loading.dismiss();
 270         }
 271     }
 272
 273     /**
 274      * {@inheritDoc}
 275      */
 276     @Override
 277     public void onFileStateChanged() {
 278         // nothing to do here!
 279     }
 280
 281
 282     /**
 283      * {@inheritDoc}
 284      */
 285     @Override
 286     public FileDownloaderBinder getFileDownloaderBinder() {
 287         return mDownloaderBinder;
 288     }
 289
 290
 291     @Override
 292     public FileUploaderBinder getFileUploaderBinder() {
 293         return mUploaderBinder;
 294     }
 295
 296
 297     @Override
 298     public void showDetails(OCFile file) {
 299         Intent showDetailsIntent = new Intent(this, FileDisplayActivity.class);
 300         showDetailsIntent.setAction(FileDisplayActivity.ACTION_DETAILS);
 301         showDetailsIntent.putExtra(FileActivity.EXTRA_FILE, file);
 302         showDetailsIntent.putExtra(FileActivity.EXTRA_ACCOUNT, AccountUtils.getCurrentOwnCloudAccount(this));
 303         startActivity(showDetailsIntent);
 304         int pos = mPreviewImagePagerAdapter.getFilePosition(file);
 305         file = mPreviewImagePagerAdapter.getFileAt(pos);
 306
 307     }
 308
 309
 310     private void requestForDownload(OCFile file) {
 311         if (mDownloaderBinder == null) {
 312             Log_OC.d(TAG, "requestForDownload called without binder to download service");
 313
 314         } else if (!mDownloaderBinder.isDownloading(getAccount(), file)) {
 315             Intent i = new Intent(this, FileDownloader.class);
 316             i.putExtra(FileDownloader.EXTRA_ACCOUNT, getAccount());
 317             i.putExtra(FileDownloader.EXTRA_FILE, file);
 318             startService(i);
 319         }
 320     }
 321
 322     /**
 323      * This method will be invoked when a new page becomes selected. Animation is not necessarily complete.
 324      *
 325      *  @param  Position        Position index of the new selected page
 326      */
 327     @Override
 328     public void onPageSelected(int position) {
 329         if (mDownloaderBinder == null) {
 330             mRequestWaitingForBinder = true;
 331
 332         } else {
 333             OCFile currentFile = mPreviewImagePagerAdapter.getFileAt(position);
 334             getSupportActionBar().setTitle(currentFile.getFileName());
 335             if (!currentFile.isDown()) {
 336                 if (!mPreviewImagePagerAdapter.pendingErrorAt(position)) {
 337                     requestForDownload(currentFile);
 338                 }
 339             }
 340         }
 341     }
 342
 343     /**
 344      * Called when the scroll state changes. Useful for discovering when the user begins dragging,
 345      * when the pager is automatically settling to the current page. when it is fully stopped/idle.
 346      *
 347      * @param   State       The new scroll state (SCROLL_STATE_IDLE, _DRAGGING, _SETTLING
 348      */
 349     @Override
 350     public void onPageScrollStateChanged(int state) {
 351     }
 352
 353     /**
 354      * This method will be invoked when the current page is scrolled, either as part of a programmatically
 355      * initiated smooth scroll or a user initiated touch scroll.
 356      *
 357      * @param   position                Position index of the first page currently being displayed.
 358      *                                  Page position+1 will be visible if positionOffset is nonzero.
 359      *
 360      * @param   positionOffset          Value from [0, 1) indicating the offset from the page at position.
 361      * @param   positionOffsetPixels    Value in pixels indicating the offset from position.
 362      */
 363     @Override
 364     public void onPageScrolled(int position, float positionOffset, int positionOffsetPixels) {
 365     }
 366
 367
 368     /**
 369      * Class waiting for broadcast events from the {@link FielDownloader} service.
 370      *
 371      * Updates the UI when a download is started or finished, provided that it is relevant for the
 372      * folder displayed in the gallery.
 373      */
 374     private class DownloadFinishReceiver extends BroadcastReceiver {
 375         @Override
 376         public void onReceive(Context context, Intent intent) {
 377             String accountName = intent.getStringExtra(FileDownloader.ACCOUNT_NAME);
 378             String downloadedRemotePath = intent.getStringExtra(FileDownloader.EXTRA_REMOTE_PATH);
 379             if (getAccount().name.equals(accountName) &&
 380                     downloadedRemotePath != null) {
 381
 382                 OCFile file = mStorageManager.getFileByPath(downloadedRemotePath);
 383                 int position = mPreviewImagePagerAdapter.getFilePosition(file);
 384                 boolean downloadWasFine = intent.getBooleanExtra(FileDownloader.EXTRA_DOWNLOAD_RESULT, false);
 385                 //boolean isOffscreen =  Math.abs((mViewPager.getCurrentItem() - position)) <= mViewPager.getOffscreenPageLimit();
 386
 387                 if (position >= 0 && intent.getAction().equals(mDownloadFinishMessage)) {
 388                     if (downloadWasFine) {
 389                         mPreviewImagePagerAdapter.updateFile(position, file);
 390
 391                     } else {
 392                         mPreviewImagePagerAdapter.updateWithDownloadError(position);
 393                     }
 394                     mPreviewImagePagerAdapter.notifyDataSetChanged();   // will trigger the creation of new fragments
 395
 396                 } else {
 397                     Log_OC.d(TAG, "Download finished, but the fragment is offscreen");
 398                 }
 399
 400             }
 401             removeStickyBroadcast(intent);
 402         }
 403
 404     }
 405
 406
 407     @Override
 408     public boolean onTouch(View v, MotionEvent event) {
 409         if (event.getAction() == MotionEvent.ACTION_UP) {
 410            toggleFullScreen();
 411         }
 412         return true;
 413     }
 414
 415
 416     private void toggleFullScreen() {
 417         ActionBar actionBar = getSupportActionBar();
 418         if (mFullScreen) {
 419             actionBar.show();
 420
 421         } else {
 422             actionBar.hide();
 423
 424         }
 425         mFullScreen = !mFullScreen;
 426     }
 427
 428     @Override
 429     protected void onAccountSet(boolean stateWasRecovered) {
 430         if (getAccount() != null) {
 431             OCFile file = getFile();
 432             /// Validate handled file  (first image to preview)
 433             if (file == null) {
 434                 throw new IllegalStateException("Instanced with a NULL OCFile");
 435             }
 436             if (!file.isImage()) {
 437                 throw new IllegalArgumentException("Non-image file passed as argument");
 438             }
 439             mStorageManager = new FileDataStorageManager(getAccount(), getContentResolver());
 440             file = mStorageManager.getFileById(file.getFileId());
 441             if (file != null) {
 442                 /// Refresh the activity according to the Account and OCFile set
 443                 setFile(file);  // reset after getting it fresh from mStorageManager
 444                 getSupportActionBar().setTitle(getFile().getFileName());
 445                 //if (!stateWasRecovered) {
 446                     initViewPager();
 447                 //}
 448
 449             } else {
 450                 // handled file not in the current Account
 451                 finish();
 452             }
 453
 454         } else {
 455             Log_OC.wtf(TAG, "onAccountChanged was called with NULL account associated!");
 456         }
 457     }
 458
 459
 460 }