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.content.SharedPreferences;
  26 import android.content.res.Configuration;
  27 import android.os.Bundle;
  28 import android.os.IBinder;
  29 import android.preference.PreferenceManager;
  30 import android.support.v4.app.Fragment;
  31 import android.support.v4.app.FragmentManager;
  32 import android.support.v4.app.FragmentTransaction;
  33 import android.support.v4.view.ViewPager;
  34 import android.view.MotionEvent;
  35 import android.view.View;
  36 import android.view.View.OnTouchListener;
  37
  38 import com.actionbarsherlock.app.ActionBar;
  39 import com.actionbarsherlock.view.MenuItem;
  40 import com.actionbarsherlock.view.Window;
  41 import com.owncloud.android.R;
  42 import com.owncloud.android.authentication.AccountUtils;
  43 import com.owncloud.android.datamodel.FileDataStorageManager;
  44 import com.owncloud.android.datamodel.OCFile;
  45 import com.owncloud.android.files.services.FileDownloader;
  46 import com.owncloud.android.files.services.FileUploader;
  47 import com.owncloud.android.files.services.FileDownloader.FileDownloaderBinder;
  48 import com.owncloud.android.files.services.FileUploader.FileUploaderBinder;
  49 import com.owncloud.android.lib.common.operations.OnRemoteOperationListener;
  50 import com.owncloud.android.lib.common.operations.RemoteOperation;
  51 import com.owncloud.android.lib.common.operations.RemoteOperationResult;
  52 import com.owncloud.android.lib.common.operations.RemoteOperationResult.ResultCode;
  53 import com.owncloud.android.operations.CreateShareOperation;
  54 import com.owncloud.android.operations.UnshareLinkOperation;
  55 import com.owncloud.android.ui.activity.FileActivity;
  56 import com.owncloud.android.ui.activity.FileDisplayActivity;
  57 import com.owncloud.android.ui.activity.PinCodeActivity;
  58 import com.owncloud.android.ui.dialog.LoadingDialog;
  59 import com.owncloud.android.ui.fragment.FileFragment;
  60 import com.owncloud.android.utils.DisplayUtils;
  61 import com.owncloud.android.utils.Log_OC;
  62
  63
  64 /**
  65  *  Holds a swiping galley where image files contained in an ownCloud directory are shown
  66  *
  67  *  @author David A. Velasco
  68  */
  69 public class PreviewImageActivity extends FileActivity implements FileFragment.ContainerActivity, ViewPager.OnPageChangeListener, OnTouchListener , OnRemoteOperationListener{
  70
  71     public static final int DIALOG_SHORT_WAIT = 0;
  72
  73     public static final String TAG = PreviewImageActivity.class.getSimpleName();
  74
  75     public static final String KEY_WAITING_TO_PREVIEW = "WAITING_TO_PREVIEW";
  76     private static final String KEY_WAITING_FOR_BINDER = "WAITING_FOR_BINDER";
  77
  78     private static final String DIALOG_WAIT_TAG = "DIALOG_WAIT";
  79
  80     private ViewPager mViewPager;
  81     private PreviewImagePagerAdapter mPreviewImagePagerAdapter;
  82
  83     private FileDownloaderBinder mDownloaderBinder = null;
  84     private ServiceConnection mDownloadConnection, mUploadConnection = null;
  85     private FileUploaderBinder mUploaderBinder = null;
  86
  87     private boolean mRequestWaitingForBinder;
  88
  89     private DownloadFinishReceiver mDownloadFinishReceiver;
  90
  91     private boolean mFullScreen;
  92
  93
  94     @Override
  95     protected void onCreate(Bundle savedInstanceState) {
  96         super.onCreate(savedInstanceState);
  97
  98         requestWindowFeature(Window.FEATURE_ACTION_BAR_OVERLAY);
  99         setContentView(R.layout.preview_image_activity);
 100
 101         ActionBar actionBar = getSupportActionBar();
 102         actionBar.setIcon(DisplayUtils.getSeasonalIconId());
 103         actionBar.setDisplayHomeAsUpEnabled(true);
 104         actionBar.hide();
 105
 106         // PIN CODE request
 107         if (getIntent().getExtras() != null && savedInstanceState == null && fromNotification()) {
 108             requestPinCode();
 109         }
 110
 111         mFullScreen = true;
 112         if (savedInstanceState != null) {
 113             mRequestWaitingForBinder = savedInstanceState.getBoolean(KEY_WAITING_FOR_BINDER);
 114         } else {
 115             mRequestWaitingForBinder = false;
 116         }
 117
 118     }
 119
 120     private void initViewPager() {
 121         // get parent from path
 122         String parentPath = getFile().getRemotePath().substring(0, getFile().getRemotePath().lastIndexOf(getFile().getFileName()));
 123         OCFile parentFolder = getStorageManager().getFileByPath(parentPath);
 124         if (parentFolder == null) {
 125             // should not be necessary
 126             parentFolder = getStorageManager().getFileByPath(OCFile.ROOT_PATH);
 127         }
 128         mPreviewImagePagerAdapter = new PreviewImagePagerAdapter(getSupportFragmentManager(), parentFolder, getAccount(), getStorageManager());
 129         mViewPager = (ViewPager) findViewById(R.id.fragmentPager);
 130         int position = mPreviewImagePagerAdapter.getFilePosition(getFile());
 131         position = (position >= 0) ? position : 0;
 132         mViewPager.setAdapter(mPreviewImagePagerAdapter);
 133         mViewPager.setOnPageChangeListener(this);
 134         mViewPager.setCurrentItem(position);
 135         if (position == 0 && !getFile().isDown()) {
 136             // this is necessary because mViewPager.setCurrentItem(0) just after setting the adapter does not result in a call to #onPageSelected(0)
 137             mRequestWaitingForBinder = true;
 138         }
 139     }
 140
 141
 142     @Override
 143     public void onStart() {
 144         super.onStart();
 145         mDownloadConnection = new PreviewImageServiceConnection();
 146         bindService(new Intent(this, FileDownloader.class), mDownloadConnection, Context.BIND_AUTO_CREATE);
 147         mUploadConnection = new PreviewImageServiceConnection();
 148         bindService(new Intent(this, FileUploader.class), mUploadConnection, Context.BIND_AUTO_CREATE);
 149     }
 150
 151     @Override
 152     protected void onSaveInstanceState(Bundle outState) {
 153         super.onSaveInstanceState(outState);
 154         outState.putBoolean(KEY_WAITING_FOR_BINDER, mRequestWaitingForBinder);
 155     }
 156
 157     @Override
 158     public void onRemoteOperationFinish(RemoteOperation operation, RemoteOperationResult result) {
 159         super.onRemoteOperationFinish(operation, result);
 160
 161         if (operation instanceof CreateShareOperation) {
 162             onCreateShareOperationFinish((CreateShareOperation) operation, result);
 163
 164         } else if (operation instanceof UnshareLinkOperation) {
 165             onUnshareLinkOperationFinish((UnshareLinkOperation) operation, result);
 166
 167         }
 168     }
 169
 170
 171     private void onUnshareLinkOperationFinish(UnshareLinkOperation operation, RemoteOperationResult result) {
 172         if (result.isSuccess()) {
 173             OCFile file = getStorageManager().getFileByPath(getFile().getRemotePath());
 174             if (file != null) {
 175                 setFile(file);
 176             }
 177             invalidateOptionsMenu();
 178         } else if  (result.getCode() == ResultCode.SHARE_NOT_FOUND) {
 179             backToDisplayActivity();
 180         }
 181
 182     }
 183
 184     private void onCreateShareOperationFinish(CreateShareOperation operation, RemoteOperationResult result) {
 185         if (result.isSuccess()) {
 186             OCFile file = getStorageManager().getFileByPath(getFile().getRemotePath());
 187             if (file != null) {
 188                 setFile(file);
 189             }
 190             invalidateOptionsMenu();
 191         }
 192     }
 193
 194     /** Defines callbacks for service binding, passed to bindService() */
 195     private class PreviewImageServiceConnection implements ServiceConnection {
 196
 197         @Override
 198         public void onServiceConnected(ComponentName component, IBinder service) {
 199
 200             if (component.equals(new ComponentName(PreviewImageActivity.this, FileDownloader.class))) {
 201                 mDownloaderBinder = (FileDownloaderBinder) service;
 202                 if (mRequestWaitingForBinder) {
 203                     mRequestWaitingForBinder = false;
 204                     Log_OC.d(TAG, "Simulating reselection of current page after connection of download binder");
 205                     onPageSelected(mViewPager.getCurrentItem());
 206                 }
 207
 208             } else if (component.equals(new ComponentName(PreviewImageActivity.this, FileUploader.class))) {
 209                 Log_OC.d(TAG, "Upload service connected");
 210                 mUploaderBinder = (FileUploaderBinder) service;
 211             } else {
 212                 return;
 213             }
 214
 215         }
 216
 217         @Override
 218         public void onServiceDisconnected(ComponentName component) {
 219             if (component.equals(new ComponentName(PreviewImageActivity.this, FileDownloader.class))) {
 220                 Log_OC.d(TAG, "Download service suddenly disconnected");
 221                 mDownloaderBinder = null;
 222             } else if (component.equals(new ComponentName(PreviewImageActivity.this, FileUploader.class))) {
 223                 Log_OC.d(TAG, "Upload service suddenly disconnected");
 224                 mUploaderBinder = null;
 225             }
 226         }
 227     };
 228
 229
 230     @Override
 231     public void onStop() {
 232         super.onStop();
 233         if (mDownloadConnection != null) {
 234             unbindService(mDownloadConnection);
 235             mDownloadConnection = null;
 236         }
 237         if (mUploadConnection != null) {
 238             unbindService(mUploadConnection);
 239             mUploadConnection = null;
 240         }
 241     }
 242
 243
 244     @Override
 245     public void onDestroy() {
 246         super.onDestroy();
 247     }
 248
 249     @Override
 250     public void onConfigurationChanged(Configuration newConfig) {
 251         super.onConfigurationChanged(newConfig);
 252     }
 253
 254     @Override
 255     public boolean onOptionsItemSelected(MenuItem item) {
 256         boolean returnValue = false;
 257
 258         switch(item.getItemId()){
 259         case android.R.id.home:
 260             backToDisplayActivity();
 261             returnValue = true;
 262             break;
 263         default:
 264                 returnValue = super.onOptionsItemSelected(item);
 265         }
 266
 267         return returnValue;
 268     }
 269
 270
 271     @Override
 272     protected void onResume() {
 273         super.onResume();
 274         //Log.e(TAG, "ACTIVITY, ONRESUME");
 275         mDownloadFinishReceiver = new DownloadFinishReceiver();
 276
 277         IntentFilter filter = new IntentFilter(FileDownloader.getDownloadFinishMessage());
 278         filter.addAction(FileDownloader.getDownloadAddedMessage());
 279         registerReceiver(mDownloadFinishReceiver, filter);
 280     }
 281
 282     @Override
 283     protected void onPostResume() {
 284         //Log.e(TAG, "ACTIVITY, ONPOSTRESUME");
 285         super.onPostResume();
 286     }
 287
 288     @Override
 289     public void onPause() {
 290         super.onPause();
 291         unregisterReceiver(mDownloadFinishReceiver);
 292         mDownloadFinishReceiver = null;
 293     }
 294
 295
 296     private void backToDisplayActivity() {
 297         finish();
 298     }
 299
 300     /**
 301      * Show loading dialog
 302      */
 303     public void showLoadingDialog() {
 304         // Construct dialog
 305         LoadingDialog loading = new LoadingDialog(getResources().getString(R.string.wait_a_moment));
 306         FragmentManager fm = getSupportFragmentManager();
 307         FragmentTransaction ft = fm.beginTransaction();
 308         loading.show(ft, DIALOG_WAIT_TAG);
 309
 310     }
 311
 312     /**
 313      * Dismiss loading dialog
 314      */
 315     public void dismissLoadingDialog(){
 316         Fragment frag = getSupportFragmentManager().findFragmentByTag(DIALOG_WAIT_TAG);
 317       if (frag != null) {
 318           LoadingDialog loading = (LoadingDialog) frag;
 319             loading.dismiss();
 320         }
 321     }
 322
 323     /**
 324      * {@inheritDoc}
 325      */
 326     @Override
 327     public void onFileStateChanged() {
 328         // nothing to do here!
 329     }
 330
 331
 332     /**
 333      * {@inheritDoc}
 334      */
 335     @Override
 336     public FileDownloaderBinder getFileDownloaderBinder() {
 337         return mDownloaderBinder;
 338     }
 339
 340
 341     @Override
 342     public FileUploaderBinder getFileUploaderBinder() {
 343         return mUploaderBinder;
 344     }
 345
 346
 347     @Override
 348     public void showDetails(OCFile file) {
 349         Intent showDetailsIntent = new Intent(this, FileDisplayActivity.class);
 350         showDetailsIntent.setAction(FileDisplayActivity.ACTION_DETAILS);
 351         showDetailsIntent.putExtra(FileActivity.EXTRA_FILE, file);
 352         showDetailsIntent.putExtra(FileActivity.EXTRA_ACCOUNT, AccountUtils.getCurrentOwnCloudAccount(this));
 353         startActivity(showDetailsIntent);
 354         int pos = mPreviewImagePagerAdapter.getFilePosition(file);
 355         file = mPreviewImagePagerAdapter.getFileAt(pos);
 356
 357     }
 358
 359
 360     private void requestForDownload(OCFile file) {
 361         if (mDownloaderBinder == null) {
 362             Log_OC.d(TAG, "requestForDownload called without binder to download service");
 363
 364         } else if (!mDownloaderBinder.isDownloading(getAccount(), file)) {
 365             Intent i = new Intent(this, FileDownloader.class);
 366             i.putExtra(FileDownloader.EXTRA_ACCOUNT, getAccount());
 367             i.putExtra(FileDownloader.EXTRA_FILE, file);
 368             startService(i);
 369         }
 370     }
 371
 372     /**
 373      * This method will be invoked when a new page becomes selected. Animation is not necessarily complete.
 374      *
 375      *  @param  Position        Position index of the new selected page
 376      */
 377     @Override
 378     public void onPageSelected(int position) {
 379         if (mDownloaderBinder == null) {
 380             mRequestWaitingForBinder = true;
 381
 382         } else {
 383             OCFile currentFile = mPreviewImagePagerAdapter.getFileAt(position);
 384             getSupportActionBar().setTitle(currentFile.getFileName());
 385             if (!currentFile.isDown()) {
 386                 if (!mPreviewImagePagerAdapter.pendingErrorAt(position)) {
 387                     requestForDownload(currentFile);
 388                 }
 389             }
 390         }
 391     }
 392
 393     /**
 394      * Called when the scroll state changes. Useful for discovering when the user begins dragging,
 395      * when the pager is automatically settling to the current page. when it is fully stopped/idle.
 396      *
 397      * @param   State       The new scroll state (SCROLL_STATE_IDLE, _DRAGGING, _SETTLING
 398      */
 399     @Override
 400     public void onPageScrollStateChanged(int state) {
 401     }
 402
 403     /**
 404      * This method will be invoked when the current page is scrolled, either as part of a programmatically
 405      * initiated smooth scroll or a user initiated touch scroll.
 406      *
 407      * @param   position                Position index of the first page currently being displayed.
 408      *                                  Page position+1 will be visible if positionOffset is nonzero.
 409      *
 410      * @param   positionOffset          Value from [0, 1) indicating the offset from the page at position.
 411      * @param   positionOffsetPixels    Value in pixels indicating the offset from position.
 412      */
 413     @Override
 414     public void onPageScrolled(int position, float positionOffset, int positionOffsetPixels) {
 415     }
 416
 417
 418     /**
 419      * Class waiting for broadcast events from the {@link FielDownloader} service.
 420      *
 421      * Updates the UI when a download is started or finished, provided that it is relevant for the
 422      * folder displayed in the gallery.
 423      */
 424     private class DownloadFinishReceiver extends BroadcastReceiver {
 425         @Override
 426         public void onReceive(Context context, Intent intent) {
 427             String accountName = intent.getStringExtra(FileDownloader.ACCOUNT_NAME);
 428             String downloadedRemotePath = intent.getStringExtra(FileDownloader.EXTRA_REMOTE_PATH);
 429             if (getAccount().name.equals(accountName) &&
 430                     downloadedRemotePath != null) {
 431
 432                 OCFile file = getStorageManager().getFileByPath(downloadedRemotePath);
 433                 int position = mPreviewImagePagerAdapter.getFilePosition(file);
 434                 boolean downloadWasFine = intent.getBooleanExtra(FileDownloader.EXTRA_DOWNLOAD_RESULT, false);
 435                 //boolean isOffscreen =  Math.abs((mViewPager.getCurrentItem() - position)) <= mViewPager.getOffscreenPageLimit();
 436
 437                 if (position >= 0 && intent.getAction().equals(FileDownloader.getDownloadFinishMessage())) {
 438                     if (downloadWasFine) {
 439                         mPreviewImagePagerAdapter.updateFile(position, file);
 440
 441                     } else {
 442                         mPreviewImagePagerAdapter.updateWithDownloadError(position);
 443                     }
 444                     mPreviewImagePagerAdapter.notifyDataSetChanged();   // will trigger the creation of new fragments
 445
 446                 } else {
 447                     Log_OC.d(TAG, "Download finished, but the fragment is offscreen");
 448                 }
 449
 450             }
 451             removeStickyBroadcast(intent);
 452         }
 453
 454     }
 455
 456
 457     @Override
 458     public boolean onTouch(View v, MotionEvent event) {
 459         if (event.getAction() == MotionEvent.ACTION_UP) {
 460            toggleFullScreen();
 461         }
 462         return true;
 463     }
 464
 465
 466     private void toggleFullScreen() {
 467         ActionBar actionBar = getSupportActionBar();
 468         if (mFullScreen) {
 469             actionBar.show();
 470
 471         } else {
 472             actionBar.hide();
 473
 474         }
 475         mFullScreen = !mFullScreen;
 476     }
 477
 478     @Override
 479     protected void onAccountSet(boolean stateWasRecovered) {
 480         super.onAccountSet(stateWasRecovered);
 481         if (getAccount() != null) {
 482             OCFile file = getFile();
 483             /// Validate handled file  (first image to preview)
 484             if (file == null) {
 485                 throw new IllegalStateException("Instanced with a NULL OCFile");
 486             }
 487             if (!file.isImage()) {
 488                 throw new IllegalArgumentException("Non-image file passed as argument");
 489             }
 490
 491             // Update file according to DB file, if it is possible
 492             if (file.getFileId() > FileDataStorageManager.ROOT_PARENT_ID)
 493                 file = getStorageManager().getFileById(file.getFileId());
 494
 495             if (file != null) {
 496                 /// Refresh the activity according to the Account and OCFile set
 497                 setFile(file);  // reset after getting it fresh from storageManager
 498                 getSupportActionBar().setTitle(getFile().getFileName());
 499                 //if (!stateWasRecovered) {
 500                     initViewPager();
 501                 //}
 502
 503             } else {
 504                 // handled file not in the current Account
 505                 finish();
 506             }
 507         }
 508     }
 509
 510
 511     /**
 512      * Launch an intent to request the PIN code to the user before letting him use the app
 513      */
 514     private void requestPinCode() {
 515         boolean pinStart = false;
 516         SharedPreferences appPrefs = PreferenceManager.getDefaultSharedPreferences(getApplicationContext());
 517         pinStart = appPrefs.getBoolean("set_pincode", false);
 518         if (pinStart) {
 519             Intent i = new Intent(getApplicationContext(), PinCodeActivity.class);
 520             i.putExtra(PinCodeActivity.EXTRA_ACTIVITY, "PreviewImageActivity");
 521             startActivity(i);
 522         }
 523     }
 524
 525 }