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

   1 /**
   2  *   ownCloud Android client application
   3  *
   4  *   @author David A. Velasco
   5  *   Copyright (C) 2015  ownCloud Inc.
   6  *
   7  *   This program is free software: you can redistribute it and/or modify
   8  *   it under the terms of the GNU General Public License version 2,
   9  *   as published by the Free Software Foundation.
  10  *
  11  *   This program is distributed in the hope that it will be useful,
  12  *   but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  *   GNU General Public License for more details.
  15  *
  16  *   You should have received a copy of the GNU General Public License
  17  *   along with this program.  If not, see <http://www.gnu.org/licenses/>.
  18  *
  19  */
  20 package com.owncloud.android.ui.preview;
  21
  22 import android.annotation.SuppressLint;
  23 import android.content.BroadcastReceiver;
  24 import android.content.ComponentName;
  25 import android.content.Context;
  26 import android.content.Intent;
  27 import android.content.IntentFilter;
  28 import android.content.ServiceConnection;
  29 import android.os.Build;
  30 import android.os.Bundle;
  31 import android.os.Handler;
  32 import android.os.IBinder;
  33 import android.os.Message;
  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.fragment.FileFragment;
  60 import com.owncloud.android.utils.DisplayUtils;
  61
  62
  63 /**
  64  *  Holds a swiping galley where image files contained in an ownCloud directory are shown
  65  */
  66 public class PreviewImageActivity extends FileActivity implements
  67  FileFragment.ContainerActivity,
  68 ViewPager.OnPageChangeListener, OnRemoteOperationListener {
  69
  70     public static final int DIALOG_SHORT_WAIT = 0;
  71
  72     public static final String TAG = PreviewImageActivity.class.getSimpleName();
  73
  74     public static final String KEY_WAITING_TO_PREVIEW = "WAITING_TO_PREVIEW";
  75     private static final String KEY_WAITING_FOR_BINDER = "WAITING_FOR_BINDER";
  76
  77     private static final int INITIAL_HIDE_DELAY = 0; // immediate hide
  78
  79     private ExtendedViewPager mViewPager;
  80     private PreviewImagePagerAdapter mPreviewImagePagerAdapter;
  81     private int mSavedPosition = 0;
  82     private boolean mHasSavedPosition = false;
  83
  84     private boolean mRequestWaitingForBinder;
  85
  86     private DownloadFinishReceiver mDownloadFinishReceiver;
  87
  88     private View mFullScreenAnchorView;
  89
  90
  91     @Override
  92     protected void onCreate(Bundle savedInstanceState) {
  93         super.onCreate(savedInstanceState);
  94
  95         requestWindowFeature(Window.FEATURE_ACTION_BAR_OVERLAY);
  96         setContentView(R.layout.preview_image_activity);
  97
  98         ActionBar actionBar = getSupportActionBar();
  99         actionBar.setIcon(DisplayUtils.getSeasonalIconId());
 100         actionBar.setDisplayHomeAsUpEnabled(true);
 101         actionBar.hide();
 102
 103         // Make sure we're running on Honeycomb or higher to use FullScreen and
 104         // Immersive Mode
 105         if (isHoneycombOrHigher()) {
 106
 107             mFullScreenAnchorView = getWindow().getDecorView();
 108             // to keep our UI controls visibility in line with system bars
 109             // visibility
 110             mFullScreenAnchorView.setOnSystemUiVisibilityChangeListener(new View.OnSystemUiVisibilityChangeListener() {
 111                 @SuppressLint("InlinedApi")
 112                 @Override
 113                 public void onSystemUiVisibilityChange(int flags) {
 114                     boolean visible = (flags & View.SYSTEM_UI_FLAG_HIDE_NAVIGATION) == 0;
 115                     ActionBar actionBar = getSupportActionBar();
 116                     if (visible) {
 117                         actionBar.show();
 118                     } else {
 119                         actionBar.hide();
 120                     }
 121                 }
 122             });
 123
 124         }
 125
 126         if (savedInstanceState != null) {
 127             mRequestWaitingForBinder = savedInstanceState.getBoolean(KEY_WAITING_FOR_BINDER);
 128         } else {
 129             mRequestWaitingForBinder = false;
 130         }
 131
 132     }
 133
 134     private void initViewPager() {
 135         // get parent from path
 136         String parentPath = getFile().getRemotePath().substring(0, getFile().getRemotePath().lastIndexOf(getFile().getFileName()));
 137         OCFile parentFolder = getStorageManager().getFileByPath(parentPath);
 138         if (parentFolder == null) {
 139             // should not be necessary
 140             parentFolder = getStorageManager().getFileByPath(OCFile.ROOT_PATH);
 141         }
 142         // TODO Enable when "On Device" is recovered ?
 143         mPreviewImagePagerAdapter = new PreviewImagePagerAdapter(getSupportFragmentManager(),
 144                 parentFolder, getAccount(), getStorageManager()/*, MainApp.getOnlyOnDevice()*/);
 145         mViewPager = (ExtendedViewPager) findViewById(R.id.fragmentPager);
 146         int position = mHasSavedPosition ? mSavedPosition : mPreviewImagePagerAdapter.getFilePosition(getFile());
 147         position = (position >= 0) ? position : 0;
 148         mViewPager.setAdapter(mPreviewImagePagerAdapter);
 149         mViewPager.setOnPageChangeListener(this);
 150         mViewPager.setCurrentItem(position);
 151         if (position == 0 && !getFile().isDown()) {
 152             // this is necessary because mViewPager.setCurrentItem(0) just after setting the adapter does not result in a call to #onPageSelected(0)
 153             mRequestWaitingForBinder = true;
 154         }
 155     }
 156
 157
 158     protected void onPostCreate(Bundle savedInstanceState)  {
 159         super.onPostCreate(savedInstanceState);
 160
 161         // Trigger the initial hide() shortly after the activity has been
 162         // created, to briefly hint to the user that UI controls
 163         // are available
 164         delayedHide(INITIAL_HIDE_DELAY);
 165
 166     }
 167
 168     Handler mHideSystemUiHandler = new Handler() {
 169         @Override
 170         public void handleMessage(Message msg) {
 171             if (isHoneycombOrHigher()) {
 172                 hideSystemUI(mFullScreenAnchorView);
 173             }
 174             getSupportActionBar().hide();
 175         }
 176     };
 177
 178     private void delayedHide(int delayMillis)   {
 179         mHideSystemUiHandler.removeMessages(0);
 180         mHideSystemUiHandler.sendEmptyMessageDelayed(0, delayMillis);
 181     }
 182
 183
 184     /// handle Window Focus changes
 185     @Override
 186     public void onWindowFocusChanged(boolean hasFocus) {
 187         super.onWindowFocusChanged(hasFocus);
 188
 189         // When the window loses focus (e.g. the action overflow is shown),
 190         // cancel any pending hide action.
 191         if (!hasFocus) {
 192             mHideSystemUiHandler.removeMessages(0);
 193         }
 194     }
 195
 196
 197
 198     @Override
 199     public void onStart() {
 200         super.onStart();
 201     }
 202
 203     @Override
 204     protected void onSaveInstanceState(Bundle outState) {
 205         super.onSaveInstanceState(outState);
 206         outState.putBoolean(KEY_WAITING_FOR_BINDER, mRequestWaitingForBinder);
 207     }
 208
 209     @Override
 210     public void onRemoteOperationFinish(RemoteOperation operation, RemoteOperationResult result) {
 211         super.onRemoteOperationFinish(operation, result);
 212
 213         if (operation instanceof CreateShareOperation) {
 214             onCreateShareOperationFinish((CreateShareOperation) operation, result);
 215
 216         } else if (operation instanceof UnshareLinkOperation) {
 217             onUnshareLinkOperationFinish((UnshareLinkOperation) operation, result);
 218
 219         } else if (operation instanceof RemoveFileOperation) {
 220             finish();
 221         }
 222     }
 223
 224
 225     private void onUnshareLinkOperationFinish(UnshareLinkOperation operation, RemoteOperationResult result) {
 226         if (result.isSuccess()) {
 227             OCFile file = getStorageManager().getFileByPath(getFile().getRemotePath());
 228             if (file != null) {
 229                 setFile(file);
 230             }
 231             invalidateOptionsMenu();
 232         } else if  (result.getCode() == ResultCode.SHARE_NOT_FOUND) {
 233             backToDisplayActivity();
 234         }
 235
 236     }
 237
 238     private void onCreateShareOperationFinish(CreateShareOperation operation, RemoteOperationResult result) {
 239         if (result.isSuccess()) {
 240             OCFile file = getStorageManager().getFileByPath(getFile().getRemotePath());
 241             if (file != null) {
 242                 setFile(file);
 243             }
 244             invalidateOptionsMenu();
 245         }
 246     }
 247
 248     @Override
 249     protected ServiceConnection newTransferenceServiceConnection() {
 250         return new PreviewImageServiceConnection();
 251     }
 252
 253     /** Defines callbacks for service binding, passed to bindService() */
 254     private class PreviewImageServiceConnection implements ServiceConnection {
 255
 256         @Override
 257         public void onServiceConnected(ComponentName component, IBinder service) {
 258
 259             if (component.equals(new ComponentName(PreviewImageActivity.this, FileDownloader.class))) {
 260                 mDownloaderBinder = (FileDownloaderBinder) service;
 261                 if (mRequestWaitingForBinder) {
 262                     mRequestWaitingForBinder = false;
 263                     Log_OC.d(TAG, "Simulating reselection of current page after connection of download binder");
 264                     onPageSelected(mViewPager.getCurrentItem());
 265                 }
 266
 267             } else if (component.equals(new ComponentName(PreviewImageActivity.this, FileUploader.class))) {
 268                 Log_OC.d(TAG, "Upload service connected");
 269                 mUploaderBinder = (FileUploaderBinder) service;
 270             } else {
 271                 return;
 272             }
 273
 274         }
 275
 276         @Override
 277         public void onServiceDisconnected(ComponentName component) {
 278             if (component.equals(new ComponentName(PreviewImageActivity.this, FileDownloader.class))) {
 279                 Log_OC.d(TAG, "Download service suddenly disconnected");
 280                 mDownloaderBinder = null;
 281             } else if (component.equals(new ComponentName(PreviewImageActivity.this, FileUploader.class))) {
 282                 Log_OC.d(TAG, "Upload service suddenly disconnected");
 283                 mUploaderBinder = null;
 284             }
 285         }
 286     };
 287
 288
 289     @Override
 290     public void onStop() {
 291         super.onStop();
 292     }
 293
 294
 295     @Override
 296     public void onDestroy() {
 297         super.onDestroy();
 298     }
 299
 300     @Override
 301     public boolean onOptionsItemSelected(MenuItem item) {
 302         boolean returnValue = false;
 303
 304         switch(item.getItemId()){
 305         case android.R.id.home:
 306             backToDisplayActivity();
 307             returnValue = true;
 308             break;
 309         default:
 310                 returnValue = super.onOptionsItemSelected(item);
 311         }
 312
 313         return returnValue;
 314     }
 315
 316
 317     @Override
 318     protected void onResume() {
 319         super.onResume();
 320
 321         mDownloadFinishReceiver = new DownloadFinishReceiver();
 322
 323         IntentFilter filter = new IntentFilter(FileDownloader.getDownloadFinishMessage());
 324         filter.addAction(FileDownloader.getDownloadAddedMessage());
 325         registerReceiver(mDownloadFinishReceiver, filter);
 326     }
 327
 328     @Override
 329     protected void onPostResume() {
 330         super.onPostResume();
 331     }
 332
 333     @Override
 334     public void onPause() {
 335         if (mDownloadFinishReceiver != null){
 336             unregisterReceiver(mDownloadFinishReceiver);
 337             mDownloadFinishReceiver = null;
 338         }
 339
 340         super.onPause();
 341     }
 342
 343
 344     private void backToDisplayActivity() {
 345         finish();
 346     }
 347
 348     @Override
 349     public void showDetails(OCFile file) {
 350         Intent showDetailsIntent = new Intent(this, FileDisplayActivity.class);
 351         showDetailsIntent.setAction(FileDisplayActivity.ACTION_DETAILS);
 352         showDetailsIntent.putExtra(FileActivity.EXTRA_FILE, file);
 353         showDetailsIntent.putExtra(FileActivity.EXTRA_ACCOUNT, AccountUtils.getCurrentOwnCloudAccount(this));
 354         startActivity(showDetailsIntent);
 355         int pos = mPreviewImagePagerAdapter.getFilePosition(file);
 356         file = mPreviewImagePagerAdapter.getFileAt(pos);
 357
 358     }
 359
 360
 361     private void requestForDownload(OCFile file) {
 362         if (mDownloaderBinder == null) {
 363             Log_OC.d(TAG, "requestForDownload called without binder to download service");
 364
 365         } else if (!mDownloaderBinder.isDownloading(getAccount(), file)) {
 366             Intent i = new Intent(this, FileDownloader.class);
 367             i.putExtra(FileDownloader.EXTRA_ACCOUNT, getAccount());
 368             i.putExtra(FileDownloader.EXTRA_FILE, file);
 369             startService(i);
 370         }
 371     }
 372
 373     /**
 374      * This method will be invoked when a new page becomes selected. Animation is not necessarily complete.
 375      *
 376      *  @param  Position        Position index of the new selected page
 377      */
 378     @Override
 379     public void onPageSelected(int position) {
 380         mSavedPosition = position;
 381         mHasSavedPosition = true;
 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 FileDownloader} 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     @Override
 528     public void onBrowsedDownTo(OCFile folder) {
 529         // TODO Auto-generated method stub
 530
 531     }
 532
 533     @Override
 534     public void onTransferStateChanged(OCFile file, boolean downloading, boolean uploading) {
 535         // TODO Auto-generated method stub
 536
 537     }
 538
 539
 540     @SuppressLint("InlinedApi")
 541         private void hideSystemUI(View anchorView) {
 542         anchorView.setSystemUiVisibility(
 543                 View.SYSTEM_UI_FLAG_HIDE_NAVIGATION         // hides NAVIGATION BAR; Android >= 4.0
 544             |   View.SYSTEM_UI_FLAG_FULLSCREEN              // hides STATUS BAR;     Android >= 4.1
 545             |   View.SYSTEM_UI_FLAG_IMMERSIVE               // stays interactive;    Android >= 4.4
 546             |   View.SYSTEM_UI_FLAG_LAYOUT_STABLE           // draw full window;     Android >= 4.1
 547             |   View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN       // draw full window;     Android >= 4.1
 548             |   View.SYSTEM_UI_FLAG_LAYOUT_HIDE_NAVIGATION  // draw full window;     Android >= 4.1
 549         );
 550     }
 551
 552     @SuppressLint("InlinedApi")
 553     private void showSystemUI(View anchorView) {
 554         anchorView.setSystemUiVisibility(
 555                 View.SYSTEM_UI_FLAG_LAYOUT_STABLE           // draw full window;     Android >= 4.1
 556             |   View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN       // draw full window;     Android >= 4.1
 557             |   View.SYSTEM_UI_FLAG_LAYOUT_HIDE_NAVIGATION  // draw full window;     Android >= 4.1
 558         );
 559     }
 560
 561     /**
 562      * Checks if OS version is Honeycomb one or higher
 563      *
 564      * @return boolean
 565      */
 566     private boolean isHoneycombOrHigher() {
 567         if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.HONEYCOMB) {
 568             return true;
 569         }
 570         return false;
 571     }
 572 }