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.annotation.SuppressLint;
  20 import android.content.BroadcastReceiver;
  21 import android.content.ComponentName;
  22 import android.content.Context;
  23 import android.content.Intent;
  24 import android.content.IntentFilter;
  25 import android.content.ServiceConnection;
  26 import android.media.MediaScannerConnection;
  27 import android.content.SharedPreferences;
  28 import android.os.Build;
  29 import android.os.Bundle;
  30 import android.os.Handler;
  31 import android.os.IBinder;
  32 import android.os.Message;
  33 import android.preference.PreferenceManager;
  34 import android.support.v4.view.ViewPager;
  35 import android.view.View;
  36
  37 import com.actionbarsherlock.app.ActionBar;
  38 import com.actionbarsherlock.view.MenuItem;
  39 import com.actionbarsherlock.view.Window;
  40 import com.ortiz.touch.ExtendedViewPager;
  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.FileDownloader.FileDownloaderBinder;
  47 import com.owncloud.android.files.services.FileUploader;
  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.lib.common.utils.Log_OC;
  54 import com.owncloud.android.operations.CreateShareOperation;
  55 import com.owncloud.android.operations.RemoveFileOperation;
  56 import com.owncloud.android.operations.UnshareLinkOperation;
  57 import com.owncloud.android.ui.activity.FileActivity;
  58 import com.owncloud.android.ui.activity.FileDisplayActivity;
  59 import com.owncloud.android.ui.activity.PinCodeActivity;
  60 import com.owncloud.android.ui.fragment.FileFragment;
  61 import com.owncloud.android.utils.DisplayUtils;
  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
  70  FileFragment.ContainerActivity,
  71 ViewPager.OnPageChangeListener, OnRemoteOperationListener {
  72
  73     public static final int DIALOG_SHORT_WAIT = 0;
  74
  75     public static final String TAG = PreviewImageActivity.class.getSimpleName();
  76
  77     public static final String KEY_WAITING_TO_PREVIEW = "WAITING_TO_PREVIEW";
  78     private static final String KEY_WAITING_FOR_BINDER = "WAITING_FOR_BINDER";
  79
  80     private static final int INITIAL_HIDE_DELAY = 0; // immediate hide
  81
  82     private ExtendedViewPager mViewPager;
  83     private PreviewImagePagerAdapter mPreviewImagePagerAdapter;
  84
  85     private boolean mRequestWaitingForBinder;
  86
  87     private DownloadFinishReceiver mDownloadFinishReceiver;
  88
  89     private View mFullScreenAnchorView;
  90
  91
  92     @Override
  93     protected void onCreate(Bundle savedInstanceState) {
  94         super.onCreate(savedInstanceState);
  95
  96         requestWindowFeature(Window.FEATURE_ACTION_BAR_OVERLAY);
  97         setContentView(R.layout.preview_image_activity);
  98
  99         ActionBar actionBar = getSupportActionBar();
 100         actionBar.setIcon(DisplayUtils.getSeasonalIconId());
 101         actionBar.setDisplayHomeAsUpEnabled(true);
 102         actionBar.hide();
 103
 104         // PIN CODE request
 105         if (getIntent().getExtras() != null && savedInstanceState == null && fromNotification()) {
 106             requestPinCode();
 107         }
 108
 109         // Make sure we're running on Honeycomb or higher to use FullScreen and
 110         // Immersive Mode
 111         if (isHoneycombOrHigher()) {
 112
 113             mFullScreenAnchorView = getWindow().getDecorView();
 114             // to keep our UI controls visibility in line with system bars
 115             // visibility
 116             mFullScreenAnchorView.setOnSystemUiVisibilityChangeListener(new View.OnSystemUiVisibilityChangeListener() {
 117                 @SuppressLint("InlinedApi")
 118                 @Override
 119                 public void onSystemUiVisibilityChange(int flags) {
 120                     boolean visible = (flags & View.SYSTEM_UI_FLAG_HIDE_NAVIGATION) == 0;
 121                     ActionBar actionBar = getSupportActionBar();
 122                     if (visible) {
 123                         actionBar.show();
 124                     } else {
 125                         actionBar.hide();
 126                     }
 127                 }
 128             });
 129
 130         }
 131
 132         if (savedInstanceState != null) {
 133             mRequestWaitingForBinder = savedInstanceState.getBoolean(KEY_WAITING_FOR_BINDER);
 134         } else {
 135             mRequestWaitingForBinder = false;
 136         }
 137
 138     }
 139
 140     private void initViewPager() {
 141         // get parent from path
 142         String parentPath = getFile().getRemotePath().substring(0, getFile().getRemotePath().lastIndexOf(getFile().getFileName()));
 143         OCFile parentFolder = getStorageManager().getFileByPath(parentPath);
 144         if (parentFolder == null) {
 145             // should not be necessary
 146             parentFolder = getStorageManager().getFileByPath(OCFile.ROOT_PATH);
 147         }
 148         mPreviewImagePagerAdapter = new PreviewImagePagerAdapter(getSupportFragmentManager(), parentFolder, getAccount(), getStorageManager());
 149         mViewPager = (ExtendedViewPager) findViewById(R.id.fragmentPager);
 150         int position = mPreviewImagePagerAdapter.getFilePosition(getFile());
 151         position = (position >= 0) ? position : 0;
 152         mViewPager.setAdapter(mPreviewImagePagerAdapter);
 153         mViewPager.setOnPageChangeListener(this);
 154         mViewPager.setCurrentItem(position);
 155         if (position == 0 && !getFile().isDown()) {
 156             // this is necessary because mViewPager.setCurrentItem(0) just after setting the adapter does not result in a call to #onPageSelected(0)
 157             mRequestWaitingForBinder = true;
 158         }
 159     }
 160
 161
 162     protected void onPostCreate(Bundle savedInstanceState)  {
 163         super.onPostCreate(savedInstanceState);
 164
 165         // Trigger the initial hide() shortly after the activity has been
 166         // created, to briefly hint to the user that UI controls
 167         // are available
 168         delayedHide(INITIAL_HIDE_DELAY);
 169
 170     }
 171
 172     Handler mHideSystemUiHandler = new Handler() {
 173         @Override
 174         public void handleMessage(Message msg) {
 175             if (isHoneycombOrHigher()) {
 176                 hideSystemUI(mFullScreenAnchorView);
 177             }
 178             getSupportActionBar().hide();
 179         }
 180     };
 181
 182     private void delayedHide(int delayMillis)   {
 183         mHideSystemUiHandler.removeMessages(0);
 184         mHideSystemUiHandler.sendEmptyMessageDelayed(0, delayMillis);
 185     }
 186
 187
 188     /// handle Window Focus changes
 189     @Override
 190     public void onWindowFocusChanged(boolean hasFocus) {
 191         super.onWindowFocusChanged(hasFocus);
 192
 193         // When the window loses focus (e.g. the action overflow is shown),
 194         // cancel any pending hide action.
 195         if (!hasFocus) {
 196             mHideSystemUiHandler.removeMessages(0);
 197         }
 198     }
 199
 200
 201
 202     @Override
 203     public void onStart() {
 204         super.onStart();
 205     }
 206
 207     @Override
 208     protected void onSaveInstanceState(Bundle outState) {
 209         super.onSaveInstanceState(outState);
 210         outState.putBoolean(KEY_WAITING_FOR_BINDER, mRequestWaitingForBinder);
 211     }
 212
 213     @Override
 214     public void onRemoteOperationFinish(RemoteOperation operation, RemoteOperationResult result) {
 215         super.onRemoteOperationFinish(operation, result);
 216
 217         if (operation instanceof CreateShareOperation) {
 218             onCreateShareOperationFinish((CreateShareOperation) operation, result);
 219
 220         } else if (operation instanceof UnshareLinkOperation) {
 221             onUnshareLinkOperationFinish((UnshareLinkOperation) operation, result);
 222
 223         } else if (operation instanceof RemoveFileOperation) {
 224             finish();
 225         }
 226     }
 227
 228
 229     private void onUnshareLinkOperationFinish(UnshareLinkOperation operation, RemoteOperationResult result) {
 230         if (result.isSuccess()) {
 231             OCFile file = getStorageManager().getFileByPath(getFile().getRemotePath());
 232             if (file != null) {
 233                 setFile(file);
 234             }
 235             invalidateOptionsMenu();
 236         } else if  (result.getCode() == ResultCode.SHARE_NOT_FOUND) {
 237             backToDisplayActivity();
 238         }
 239
 240     }
 241
 242     private void onCreateShareOperationFinish(CreateShareOperation operation, RemoteOperationResult result) {
 243         if (result.isSuccess()) {
 244             OCFile file = getStorageManager().getFileByPath(getFile().getRemotePath());
 245             if (file != null) {
 246                 setFile(file);
 247             }
 248             invalidateOptionsMenu();
 249         }
 250     }
 251
 252     @Override
 253     protected ServiceConnection newTransferenceServiceConnection() {
 254         return new PreviewImageServiceConnection();
 255     }
 256
 257     /** Defines callbacks for service binding, passed to bindService() */
 258     private class PreviewImageServiceConnection implements ServiceConnection {
 259
 260         @Override
 261         public void onServiceConnected(ComponentName component, IBinder service) {
 262
 263             if (component.equals(new ComponentName(PreviewImageActivity.this, FileDownloader.class))) {
 264                 mDownloaderBinder = (FileDownloaderBinder) service;
 265                 if (mRequestWaitingForBinder) {
 266                     mRequestWaitingForBinder = false;
 267                     Log_OC.d(TAG, "Simulating reselection of current page after connection of download binder");
 268                     onPageSelected(mViewPager.getCurrentItem());
 269                 }
 270
 271             } else if (component.equals(new ComponentName(PreviewImageActivity.this, FileUploader.class))) {
 272                 Log_OC.d(TAG, "Upload service connected");
 273                 mUploaderBinder = (FileUploaderBinder) service;
 274             } else {
 275                 return;
 276             }
 277
 278         }
 279
 280         @Override
 281         public void onServiceDisconnected(ComponentName component) {
 282             if (component.equals(new ComponentName(PreviewImageActivity.this, FileDownloader.class))) {
 283                 Log_OC.d(TAG, "Download service suddenly disconnected");
 284                 mDownloaderBinder = null;
 285             } else if (component.equals(new ComponentName(PreviewImageActivity.this, FileUploader.class))) {
 286                 Log_OC.d(TAG, "Upload service suddenly disconnected");
 287                 mUploaderBinder = null;
 288             }
 289         }
 290     };
 291
 292
 293     @Override
 294     public void onStop() {
 295         super.onStop();
 296     }
 297
 298
 299     @Override
 300     public void onDestroy() {
 301         super.onDestroy();
 302     }
 303
 304     @Override
 305     public boolean onOptionsItemSelected(MenuItem item) {
 306         boolean returnValue = false;
 307
 308         switch(item.getItemId()){
 309         case android.R.id.home:
 310             backToDisplayActivity();
 311             returnValue = true;
 312             break;
 313         default:
 314                 returnValue = super.onOptionsItemSelected(item);
 315         }
 316
 317         return returnValue;
 318     }
 319
 320
 321     @Override
 322     protected void onResume() {
 323         super.onResume();
 324         //Log_OC.e(TAG, "ACTIVITY, ONRESUME");
 325         mDownloadFinishReceiver = new DownloadFinishReceiver();
 326
 327         IntentFilter filter = new IntentFilter(FileDownloader.getDownloadFinishMessage());
 328         filter.addAction(FileDownloader.getDownloadAddedMessage());
 329         registerReceiver(mDownloadFinishReceiver, filter);
 330     }
 331
 332     @Override
 333     protected void onPostResume() {
 334         //Log_OC.e(TAG, "ACTIVITY, ONPOSTRESUME");
 335         super.onPostResume();
 336     }
 337
 338     @Override
 339     public void onPause() {
 340         unregisterReceiver(mDownloadFinishReceiver);
 341         mDownloadFinishReceiver = null;
 342         super.onPause();
 343     }
 344
 345
 346     private void backToDisplayActivity() {
 347         finish();
 348     }
 349
 350     @Override
 351     public void showDetails(OCFile file) {
 352         Intent showDetailsIntent = new Intent(this, FileDisplayActivity.class);
 353         showDetailsIntent.setAction(FileDisplayActivity.ACTION_DETAILS);
 354         showDetailsIntent.putExtra(FileActivity.EXTRA_FILE, file);
 355         showDetailsIntent.putExtra(FileActivity.EXTRA_ACCOUNT, AccountUtils.getCurrentOwnCloudAccount(this));
 356         startActivity(showDetailsIntent);
 357         int pos = mPreviewImagePagerAdapter.getFilePosition(file);
 358         file = mPreviewImagePagerAdapter.getFileAt(pos);
 359
 360     }
 361
 362
 363     private void requestForDownload(OCFile file) {
 364         if (mDownloaderBinder == null) {
 365             Log_OC.d(TAG, "requestForDownload called without binder to download service");
 366
 367         } else if (!mDownloaderBinder.isDownloading(getAccount(), file)) {
 368             Intent i = new Intent(this, FileDownloader.class);
 369             i.putExtra(FileDownloader.EXTRA_ACCOUNT, getAccount());
 370             i.putExtra(FileDownloader.EXTRA_FILE, file);
 371             startService(i);
 372         }
 373     }
 374
 375     /**
 376      * This method will be invoked when a new page becomes selected. Animation is not necessarily complete.
 377      *
 378      *  @param  Position        Position index of the new selected page
 379      */
 380     @Override
 381     public void onPageSelected(int position) {
 382         if (mDownloaderBinder == null) {
 383             mRequestWaitingForBinder = true;
 384
 385         } else {
 386             OCFile currentFile = mPreviewImagePagerAdapter.getFileAt(position);
 387             getSupportActionBar().setTitle(currentFile.getFileName());
 388             if (!currentFile.isDown()) {
 389                 if (!mPreviewImagePagerAdapter.pendingErrorAt(position)) {
 390                     requestForDownload(currentFile);
 391                 }
 392             }
 393
 394             // Call to reset image zoom to initial state
 395             ((PreviewImagePagerAdapter) mViewPager.getAdapter()).resetZoom();
 396         }
 397
 398     }
 399
 400     /**
 401      * Called when the scroll state changes. Useful for discovering when the user begins dragging,
 402      * when the pager is automatically settling to the current page. when it is fully stopped/idle.
 403      *
 404      * @param   State       The new scroll state (SCROLL_STATE_IDLE, _DRAGGING, _SETTLING
 405      */
 406     @Override
 407     public void onPageScrollStateChanged(int state) {
 408     }
 409
 410     /**
 411      * This method will be invoked when the current page is scrolled, either as part of a programmatically
 412      * initiated smooth scroll or a user initiated touch scroll.
 413      *
 414      * @param   position                Position index of the first page currently being displayed.
 415      *                                  Page position+1 will be visible if positionOffset is nonzero.
 416      *
 417      * @param   positionOffset          Value from [0, 1) indicating the offset from the page at position.
 418      * @param   positionOffsetPixels    Value in pixels indicating the offset from position.
 419      */
 420     @Override
 421     public void onPageScrolled(int position, float positionOffset, int positionOffsetPixels) {
 422     }
 423
 424
 425     /**
 426      * Class waiting for broadcast events from the {@link FielDownloader} service.
 427      *
 428      * Updates the UI when a download is started or finished, provided that it is relevant for the
 429      * folder displayed in the gallery.
 430      */
 431     private class DownloadFinishReceiver extends BroadcastReceiver {
 432         @Override
 433         public void onReceive(Context context, Intent intent) {
 434             String accountName = intent.getStringExtra(FileDownloader.ACCOUNT_NAME);
 435             String downloadedRemotePath = intent.getStringExtra(FileDownloader.EXTRA_REMOTE_PATH);
 436             if (getAccount().name.equals(accountName) &&
 437                     downloadedRemotePath != null) {
 438
 439                 OCFile file = getStorageManager().getFileByPath(downloadedRemotePath);
 440                 int position = mPreviewImagePagerAdapter.getFilePosition(file);
 441                 boolean downloadWasFine = intent.getBooleanExtra(FileDownloader.EXTRA_DOWNLOAD_RESULT, false);
 442                 //boolean isOffscreen =  Math.abs((mViewPager.getCurrentItem() - position)) <= mViewPager.getOffscreenPageLimit();
 443
 444                 if (position >= 0 && intent.getAction().equals(FileDownloader.getDownloadFinishMessage())) {
 445                     if (downloadWasFine) {
 446                         mPreviewImagePagerAdapter.updateFile(position, file);
 447
 448                     } else {
 449                         mPreviewImagePagerAdapter.updateWithDownloadError(position);
 450                     }
 451                     mPreviewImagePagerAdapter.notifyDataSetChanged();   // will trigger the creation of new fragments
 452
 453                 } else {
 454                     Log_OC.d(TAG, "Download finished, but the fragment is offscreen");
 455                 }
 456
 457             }
 458             removeStickyBroadcast(intent);
 459         }
 460
 461     }
 462
 463     @SuppressLint("InlinedApi")
 464         public void toggleFullScreen() {
 465
 466         if (isHoneycombOrHigher()) {
 467
 468             boolean visible = (mFullScreenAnchorView.getSystemUiVisibility()
 469                     & View.SYSTEM_UI_FLAG_HIDE_NAVIGATION) == 0;
 470
 471             if (visible) {
 472                 hideSystemUI(mFullScreenAnchorView);
 473                 // actionBar.hide(); // propagated through
 474                 // OnSystemUiVisibilityChangeListener()
 475             } else {
 476                 showSystemUI(mFullScreenAnchorView);
 477                 // actionBar.show(); // propagated through
 478                 // OnSystemUiVisibilityChangeListener()
 479             }
 480
 481         } else {
 482
 483             ActionBar actionBar = getSupportActionBar();
 484             if (!actionBar.isShowing()) {
 485                 actionBar.show();
 486
 487             } else {
 488                 actionBar.hide();
 489
 490             }
 491
 492         }
 493     }
 494
 495     @Override
 496     protected void onAccountSet(boolean stateWasRecovered) {
 497         super.onAccountSet(stateWasRecovered);
 498         if (getAccount() != null) {
 499             OCFile file = getFile();
 500             /// Validate handled file  (first image to preview)
 501             if (file == null) {
 502                 throw new IllegalStateException("Instanced with a NULL OCFile");
 503             }
 504             if (!file.isImage()) {
 505                 throw new IllegalArgumentException("Non-image file passed as argument");
 506             }
 507
 508             // Update file according to DB file, if it is possible
 509             if (file.getFileId() > FileDataStorageManager.ROOT_PARENT_ID)
 510                 file = getStorageManager().getFileById(file.getFileId());
 511
 512             if (file != null) {
 513                 /// Refresh the activity according to the Account and OCFile set
 514                 setFile(file);  // reset after getting it fresh from storageManager
 515                 getSupportActionBar().setTitle(getFile().getFileName());
 516                 //if (!stateWasRecovered) {
 517                     initViewPager();
 518                 //}
 519
 520             } else {
 521                 // handled file not in the current Account
 522                 finish();
 523             }
 524         }
 525     }
 526
 527
 528     /**
 529      * Launch an intent to request the PIN code to the user before letting him use the app
 530      */
 531     private void requestPinCode() {
 532         boolean pinStart = false;
 533         SharedPreferences appPrefs = PreferenceManager.getDefaultSharedPreferences(getApplicationContext());
 534         pinStart = appPrefs.getBoolean("set_pincode", false);
 535         if (pinStart) {
 536             Intent i = new Intent(getApplicationContext(), PinCodeActivity.class);
 537             i.putExtra(PinCodeActivity.EXTRA_ACTIVITY, "PreviewImageActivity");
 538             startActivity(i);
 539         }
 540     }
 541
 542     @Override
 543     public void onBrowsedDownTo(OCFile folder) {
 544         // TODO Auto-generated method stub
 545
 546     }
 547
 548     @Override
 549     public void onTransferStateChanged(OCFile file, boolean downloading, boolean uploading) {
 550         // TODO Auto-generated method stub
 551
 552     }
 553
 554
 555     @SuppressLint("InlinedApi")
 556         private void hideSystemUI(View anchorView) {
 557         anchorView.setSystemUiVisibility(
 558                 View.SYSTEM_UI_FLAG_HIDE_NAVIGATION         // hides NAVIGATION BAR; Android >= 4.0
 559             |   View.SYSTEM_UI_FLAG_FULLSCREEN              // hides STATUS BAR;     Android >= 4.1
 560             |   View.SYSTEM_UI_FLAG_IMMERSIVE               // stays interactive;    Android >= 4.4
 561             |   View.SYSTEM_UI_FLAG_LAYOUT_STABLE           // draw full window;     Android >= 4.1
 562             |   View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN       // draw full window;     Android >= 4.1
 563             |   View.SYSTEM_UI_FLAG_LAYOUT_HIDE_NAVIGATION  // draw full window;     Android >= 4.1
 564         );
 565     }
 566
 567     @SuppressLint("InlinedApi")
 568     private void showSystemUI(View anchorView) {
 569         anchorView.setSystemUiVisibility(
 570                 View.SYSTEM_UI_FLAG_LAYOUT_STABLE           // draw full window;     Android >= 4.1
 571             |   View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN       // draw full window;     Android >= 4.1
 572             |   View.SYSTEM_UI_FLAG_LAYOUT_HIDE_NAVIGATION  // draw full window;     Android >= 4.1
 573         );
 574     }
 575
 576     /**
 577      * Checks if OS version is Honeycomb one or higher
 578      *
 579      * @return boolean
 580      */
 581     private boolean isHoneycombOrHigher() {
 582         if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.HONEYCOMB) {
 583             return true;
 584         }
 585         return false;
 586     }
 587
 588 }