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 hd 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.GravityCompat;
  35 import android.support.v4.view.ViewPager;
  36 import android.support.v4.widget.DrawerLayout;
  37 import android.support.v7.app.ActionBar;
  38 import android.view.MenuItem;
  39 import android.view.View;
  40 import android.view.Window;
  41
  42 import com.ortiz.touch.ExtendedViewPager;
  43 import com.owncloud.android.R;
  44 import com.owncloud.android.authentication.AccountUtils;
  45 import com.owncloud.android.datamodel.FileDataStorageManager;
  46 import com.owncloud.android.datamodel.OCFile;
  47 import com.owncloud.android.files.services.FileDownloader;
  48 import com.owncloud.android.files.services.FileDownloader.FileDownloaderBinder;
  49 import com.owncloud.android.files.services.FileUploader;
  50 import com.owncloud.android.files.services.FileUploader.FileUploaderBinder;
  51 import com.owncloud.android.lib.common.operations.OnRemoteOperationListener;
  52 import com.owncloud.android.lib.common.operations.RemoteOperation;
  53 import com.owncloud.android.lib.common.operations.RemoteOperationResult;
  54 import com.owncloud.android.lib.common.operations.RemoteOperationResult.ResultCode;
  55 import com.owncloud.android.lib.common.utils.Log_OC;
  56 import com.owncloud.android.operations.CreateShareOperation;
  57 import com.owncloud.android.operations.RemoveFileOperation;
  58 import com.owncloud.android.operations.UnshareLinkOperation;
  59 import com.owncloud.android.ui.activity.FileActivity;
  60 import com.owncloud.android.ui.activity.FileDisplayActivity;
  61 import com.owncloud.android.ui.fragment.FileFragment;
  62 import com.owncloud.android.utils.DisplayUtils;
  63
  64
  65 /**
  66  *  Holds a swiping galley where image files contained in an ownCloud directory are shown
  67  */
  68 public class PreviewImageActivity extends FileActivity implements
  69         FileFragment.ContainerActivity,
  70         ViewPager.OnPageChangeListener, OnRemoteOperationListener {
  71
  72     public static final int DIALOG_SHORT_WAIT = 0;
  73
  74     public static final String TAG = PreviewImageActivity.class.getSimpleName();
  75
  76     public static final String KEY_WAITING_TO_PREVIEW = "WAITING_TO_PREVIEW";
  77     private static final String KEY_WAITING_FOR_BINDER = "WAITING_FOR_BINDER";
  78
  79     private static final int INITIAL_HIDE_DELAY = 0; // immediate hide
  80
  81     private ExtendedViewPager mViewPager;
  82     private PreviewImagePagerAdapter mPreviewImagePagerAdapter;
  83     private int mSavedPosition = 0;
  84     private boolean mHasSavedPosition = false;
  85
  86     private boolean mRequestWaitingForBinder;
  87
  88     private DownloadFinishReceiver mDownloadFinishReceiver;
  89
  90     private View mFullScreenAnchorView;
  91
  92
  93     @Override
  94     protected void onCreate(Bundle savedInstanceState) {
  95         requestWindowFeature(Window.FEATURE_ACTION_BAR_OVERLAY);
  96
  97         super.onCreate(savedInstanceState);
  98
  99         setContentView(R.layout.preview_image_activity);
 100
 101         // Navigation Drawer
 102         initDrawer();
 103
 104         // ActionBar
 105         ActionBar actionBar = getSupportActionBar();
 106         actionBar.setIcon(DisplayUtils.getSeasonalIconId());
 107         updateActionBarTitleAndHomeButton(null);
 108         actionBar.hide();
 109
 110
 111         // Make sure we're running on Honeycomb or higher to use FullScreen and
 112         // Immersive Mode
 113         if (isHoneycombOrHigher()) {
 114
 115             mFullScreenAnchorView = getWindow().getDecorView();
 116             // to keep our UI controls visibility in line with system bars
 117             // visibility
 118             mFullScreenAnchorView.setOnSystemUiVisibilityChangeListener
 119                     (new View.OnSystemUiVisibilityChangeListener() {
 120                 @SuppressLint("InlinedApi")
 121                 @Override
 122                 public void onSystemUiVisibilityChange(int flags) {
 123                     boolean visible = (flags & View.SYSTEM_UI_FLAG_HIDE_NAVIGATION) == 0;
 124                     ActionBar actionBar = getSupportActionBar();
 125                     if (visible) {
 126                         actionBar.show();
 127                         mDrawerLayout.setDrawerLockMode(DrawerLayout.LOCK_MODE_UNLOCKED);
 128                     } else {
 129                         actionBar.hide();
 130                         mDrawerLayout.setDrawerLockMode(DrawerLayout.LOCK_MODE_LOCKED_CLOSED);
 131                     }
 132                 }
 133             });
 134
 135         }
 136
 137         if (savedInstanceState != null) {
 138             mRequestWaitingForBinder = savedInstanceState.getBoolean(KEY_WAITING_FOR_BINDER);
 139         } else {
 140             mRequestWaitingForBinder = false;
 141         }
 142
 143     }
 144
 145     private void initViewPager() {
 146         // get parent from path
 147         String parentPath = getFile().getRemotePath().substring(0,
 148                 getFile().getRemotePath().lastIndexOf(getFile().getFileName()));
 149         OCFile parentFolder = getStorageManager().getFileByPath(parentPath);
 150         if (parentFolder == null) {
 151             // should not be necessary
 152             parentFolder = getStorageManager().getFileByPath(OCFile.ROOT_PATH);
 153         }
 154
 155         // TODO Enable when "On Device" is recovered ?
 156         mPreviewImagePagerAdapter = new PreviewImagePagerAdapter(getSupportFragmentManager(),
 157                 parentFolder, getAccount(), getStorageManager()/*, MainApp.getOnlyOnDevice()*/);
 158
 159         mViewPager = (ExtendedViewPager) findViewById(R.id.fragmentPager);
 160         int position = mHasSavedPosition ? mSavedPosition :
 161                 mPreviewImagePagerAdapter.getFilePosition(getFile());
 162         position = (position >= 0) ? position : 0;
 163         mViewPager.setAdapter(mPreviewImagePagerAdapter);
 164         mViewPager.setOnPageChangeListener(this);
 165         mViewPager.setCurrentItem(position);
 166         if (position == 0 && !getFile().isDown()) {
 167             // this is necessary because mViewPager.setCurrentItem(0) just after setting the
 168             // adapter does not result in a call to #onPageSelected(0)
 169             mRequestWaitingForBinder = true;
 170         }
 171     }
 172
 173
 174     protected void onPostCreate(Bundle savedInstanceState)  {
 175         super.onPostCreate(savedInstanceState);
 176
 177         // Trigger the initial hide() shortly after the activity has been
 178         // created, to briefly hint to the user that UI controls
 179         // are available
 180         delayedHide(INITIAL_HIDE_DELAY);
 181
 182     }
 183
 184     Handler mHideSystemUiHandler = new Handler() {
 185         @Override
 186         public void handleMessage(Message msg) {
 187             if (isHoneycombOrHigher()) {
 188                 hideSystemUI(mFullScreenAnchorView);
 189             }
 190             getSupportActionBar().hide();
 191         }
 192     };
 193
 194     private void delayedHide(int delayMillis)   {
 195         mHideSystemUiHandler.removeMessages(0);
 196         mHideSystemUiHandler.sendEmptyMessageDelayed(0, delayMillis);
 197     }
 198
 199
 200     /// handle Window Focus changes
 201     @Override
 202     public void onWindowFocusChanged(boolean hasFocus) {
 203         super.onWindowFocusChanged(hasFocus);
 204
 205         // When the window loses focus (e.g. the action overflow is shown),
 206         // cancel any pending hide action.
 207         if (!hasFocus) {
 208             mHideSystemUiHandler.removeMessages(0);
 209         }
 210     }
 211
 212
 213
 214     @Override
 215     public void onStart() {
 216         super.onStart();
 217     }
 218
 219     @Override
 220     protected void onSaveInstanceState(Bundle outState) {
 221         super.onSaveInstanceState(outState);
 222         outState.putBoolean(KEY_WAITING_FOR_BINDER, mRequestWaitingForBinder);
 223     }
 224
 225     @Override
 226     public void onRemoteOperationFinish(RemoteOperation operation, RemoteOperationResult result) {
 227         super.onRemoteOperationFinish(operation, result);
 228
 229         if (operation instanceof CreateShareOperation) {
 230             onCreateShareOperationFinish((CreateShareOperation) operation, result);
 231
 232         } else if (operation instanceof UnshareLinkOperation) {
 233             onUnshareLinkOperationFinish((UnshareLinkOperation) operation, result);
 234
 235         } else if (operation instanceof RemoveFileOperation) {
 236             finish();
 237         }
 238     }
 239
 240
 241     private void onUnshareLinkOperationFinish(UnshareLinkOperation operation,
 242                                               RemoteOperationResult result) {
 243         if (result.isSuccess()) {
 244             OCFile file = getStorageManager().getFileByPath(getFile().getRemotePath());
 245             if (file != null) {
 246                 setFile(file);
 247             }
 248             invalidateOptionsMenu();
 249         } else if  (result.getCode() == ResultCode.SHARE_NOT_FOUND) {
 250             backToDisplayActivity();
 251         }
 252
 253     }
 254
 255     private void onCreateShareOperationFinish(CreateShareOperation operation,
 256                                               RemoteOperationResult result) {
 257         if (result.isSuccess()) {
 258             OCFile file = getStorageManager().getFileByPath(getFile().getRemotePath());
 259             if (file != null) {
 260                 setFile(file);
 261             }
 262             invalidateOptionsMenu();
 263         }
 264     }
 265
 266     @Override
 267     protected ServiceConnection newTransferenceServiceConnection() {
 268         return new PreviewImageServiceConnection();
 269     }
 270
 271     /** Defines callbacks for service binding, passed to bindService() */
 272     private class PreviewImageServiceConnection implements ServiceConnection {
 273
 274         @Override
 275         public void onServiceConnected(ComponentName component, IBinder service) {
 276
 277             if (component.equals(new ComponentName(PreviewImageActivity.this,
 278                     FileDownloader.class))) {
 279                 mDownloaderBinder = (FileDownloaderBinder) service;
 280                 if (mRequestWaitingForBinder) {
 281                     mRequestWaitingForBinder = false;
 282                     Log_OC.d(TAG, "Simulating reselection of current page after connection " +
 283                             "of download binder");
 284                     onPageSelected(mViewPager.getCurrentItem());
 285                 }
 286
 287             } else if (component.equals(new ComponentName(PreviewImageActivity.this,
 288                     FileUploader.class))) {
 289                 Log_OC.d(TAG, "Upload service connected");
 290                 mUploaderBinder = (FileUploaderBinder) service;
 291             } else {
 292                 return;
 293             }
 294
 295         }
 296
 297         @Override
 298         public void onServiceDisconnected(ComponentName component) {
 299             if (component.equals(new ComponentName(PreviewImageActivity.this,
 300                     FileDownloader.class))) {
 301                 Log_OC.d(TAG, "Download service suddenly disconnected");
 302                 mDownloaderBinder = null;
 303             } else if (component.equals(new ComponentName(PreviewImageActivity.this,
 304                     FileUploader.class))) {
 305                 Log_OC.d(TAG, "Upload service suddenly disconnected");
 306                 mUploaderBinder = null;
 307             }
 308         }
 309     };
 310
 311
 312     @Override
 313     public void onStop() {
 314         super.onStop();
 315     }
 316
 317
 318     @Override
 319     public void onDestroy() {
 320         super.onDestroy();
 321     }
 322
 323     @Override
 324     public boolean onOptionsItemSelected(MenuItem item) {
 325         boolean returnValue = false;
 326
 327         switch(item.getItemId()){
 328         case android.R.id.home:
 329             if (mDrawerLayout.isDrawerOpen(GravityCompat.START)) {
 330                 mDrawerLayout.closeDrawer(GravityCompat.START);
 331             } else {
 332                 backToDisplayActivity();
 333             }
 334             returnValue = true;
 335             break;
 336         default:
 337                 returnValue = super.onOptionsItemSelected(item);
 338         }
 339
 340         return returnValue;
 341     }
 342
 343
 344     @Override
 345     protected void onResume() {
 346         super.onResume();
 347
 348         mDownloadFinishReceiver = new DownloadFinishReceiver();
 349
 350         IntentFilter filter = new IntentFilter(FileDownloader.getDownloadFinishMessage());
 351         filter.addAction(FileDownloader.getDownloadAddedMessage());
 352         registerReceiver(mDownloadFinishReceiver, filter);
 353     }
 354
 355     @Override
 356     protected void onPostResume() {
 357         super.onPostResume();
 358     }
 359
 360     @Override
 361     public void onPause() {
 362         if (mDownloadFinishReceiver != null){
 363             unregisterReceiver(mDownloadFinishReceiver);
 364             mDownloadFinishReceiver = null;
 365         }
 366
 367         super.onPause();
 368     }
 369
 370
 371     private void backToDisplayActivity() {
 372         finish();
 373     }
 374
 375     @Override
 376     public void showDetails(OCFile file) {
 377         Intent showDetailsIntent = new Intent(this, FileDisplayActivity.class);
 378         showDetailsIntent.setAction(FileDisplayActivity.ACTION_DETAILS);
 379         showDetailsIntent.putExtra(FileActivity.EXTRA_FILE, file);
 380         showDetailsIntent.putExtra(FileActivity.EXTRA_ACCOUNT,
 381                 AccountUtils.getCurrentOwnCloudAccount(this));
 382         startActivity(showDetailsIntent);
 383         int pos = mPreviewImagePagerAdapter.getFilePosition(file);
 384         file = mPreviewImagePagerAdapter.getFileAt(pos);
 385
 386     }
 387
 388
 389     private void requestForDownload(OCFile file) {
 390         if (mDownloaderBinder == null) {
 391             Log_OC.d(TAG, "requestForDownload called without binder to download service");
 392
 393         } else if (!mDownloaderBinder.isDownloading(getAccount(), file)) {
 394             Intent i = new Intent(this, FileDownloader.class);
 395             i.putExtra(FileDownloader.EXTRA_ACCOUNT, getAccount());
 396             i.putExtra(FileDownloader.EXTRA_FILE, file);
 397             startService(i);
 398         }
 399     }
 400
 401     /**
 402      * This method will be invoked when a new page becomes selected. Animation is not necessarily
 403      * complete.
 404      *
 405      *  @param  position        Position index of the new selected page
 406      */
 407     @Override
 408     public void onPageSelected(int position) {
 409         mSavedPosition = position;
 410         mHasSavedPosition = true;
 411         if (mDownloaderBinder == null) {
 412             mRequestWaitingForBinder = true;
 413
 414         } else {
 415             OCFile currentFile = mPreviewImagePagerAdapter.getFileAt(position);
 416             getSupportActionBar().setTitle(currentFile.getFileName());
 417             mDrawerToggle.setDrawerIndicatorEnabled(false);
 418             if (!currentFile.isDown()) {
 419                 if (!mPreviewImagePagerAdapter.pendingErrorAt(position)) {
 420                     requestForDownload(currentFile);
 421                 }
 422             }
 423
 424             // Call to reset image zoom to initial state
 425             ((PreviewImagePagerAdapter) mViewPager.getAdapter()).resetZoom();
 426         }
 427
 428     }
 429
 430     /**
 431      * Called when the scroll state changes. Useful for discovering when the user begins dragging,
 432      * when the pager is automatically settling to the current page. when it is fully stopped/idle.
 433      *
 434      * @param   state       The new scroll state (SCROLL_STATE_IDLE, _DRAGGING, _SETTLING
 435      */
 436     @Override
 437     public void onPageScrollStateChanged(int state) {
 438     }
 439
 440     /**
 441      * This method will be invoked when the current page is scrolled, either as part of a
 442      * programmatically initiated smooth scroll or a user initiated touch scroll.
 443      *
 444      * @param   position                Position index of the first page currently being displayed.
 445      *                                  Page position+1 will be visible if positionOffset is
 446      *                                  nonzero.
 447      *
 448      * @param   positionOffset          Value from [0, 1) indicating the offset from the page
 449      *                                  at position.
 450      * @param   positionOffsetPixels    Value in pixels indicating the offset from position.
 451      */
 452     @Override
 453     public void onPageScrolled(int position, float positionOffset, int positionOffsetPixels) {
 454     }
 455
 456
 457     /**
 458      * Class waiting for broadcast events from the {@link FileDownloader} service.
 459      *
 460      * Updates the UI when a download is started or finished, provided that it is relevant for the
 461      * folder displayed in the gallery.
 462      */
 463     private class DownloadFinishReceiver extends BroadcastReceiver {
 464         @Override
 465         public void onReceive(Context context, Intent intent) {
 466             String accountName = intent.getStringExtra(FileDownloader.ACCOUNT_NAME);
 467             String downloadedRemotePath = intent.getStringExtra(FileDownloader.EXTRA_REMOTE_PATH);
 468             if (getAccount().name.equals(accountName) &&
 469                     downloadedRemotePath != null) {
 470
 471                 OCFile file = getStorageManager().getFileByPath(downloadedRemotePath);
 472                 int position = mPreviewImagePagerAdapter.getFilePosition(file);
 473                 boolean downloadWasFine = intent.getBooleanExtra(
 474                         FileDownloader.EXTRA_DOWNLOAD_RESULT, false);
 475                 //boolean isOffscreen =  Math.abs((mViewPager.getCurrentItem() - position))
 476                 // <= mViewPager.getOffscreenPageLimit();
 477
 478                 if (position >= 0 &&
 479                         intent.getAction().equals(FileDownloader.getDownloadFinishMessage())) {
 480                     if (downloadWasFine) {
 481                         mPreviewImagePagerAdapter.updateFile(position, file);
 482
 483                     } else {
 484                         mPreviewImagePagerAdapter.updateWithDownloadError(position);
 485                     }
 486                     mPreviewImagePagerAdapter.notifyDataSetChanged();   // will trigger the creation
 487                                                                         // of new fragments
 488
 489                 } else {
 490                     Log_OC.d(TAG, "Download finished, but the fragment is offscreen");
 491                 }
 492
 493             }
 494             removeStickyBroadcast(intent);
 495         }
 496
 497     }
 498
 499     @SuppressLint("InlinedApi")
 500         public void toggleFullScreen() {
 501
 502         if (isHoneycombOrHigher()) {
 503
 504             boolean visible = (mFullScreenAnchorView.getSystemUiVisibility()
 505                     & View.SYSTEM_UI_FLAG_HIDE_NAVIGATION) == 0;
 506
 507             if (visible) {
 508                 hideSystemUI(mFullScreenAnchorView);
 509                 // actionBar.hide(); // propagated through
 510                 // OnSystemUiVisibilityChangeListener()
 511             } else {
 512                 showSystemUI(mFullScreenAnchorView);
 513                 // actionBar.show(); // propagated through
 514                 // OnSystemUiVisibilityChangeListener()
 515             }
 516
 517         } else {
 518
 519             ActionBar actionBar = getSupportActionBar();
 520             if (!actionBar.isShowing()) {
 521                 actionBar.show();
 522                 mDrawerLayout.setDrawerLockMode(DrawerLayout.LOCK_MODE_UNLOCKED);
 523
 524             } else {
 525                 actionBar.hide();
 526                 mDrawerLayout.setDrawerLockMode(DrawerLayout.LOCK_MODE_LOCKED_CLOSED);
 527
 528             }
 529
 530         }
 531     }
 532
 533     @Override
 534     protected void onAccountSet(boolean stateWasRecovered) {
 535         super.onAccountSet(stateWasRecovered);
 536         if (getAccount() != null) {
 537             OCFile file = getFile();
 538             /// Validate handled file  (first image to preview)
 539             if (file == null) {
 540                 throw new IllegalStateException("Instanced with a NULL OCFile");
 541             }
 542             if (!file.isImage()) {
 543                 throw new IllegalArgumentException("Non-image file passed as argument");
 544             }
 545
 546             // Update file according to DB file, if it is possible
 547             if (file.getFileId() > FileDataStorageManager.ROOT_PARENT_ID)
 548                 file = getStorageManager().getFileById(file.getFileId());
 549
 550             if (file != null) {
 551                 /// Refresh the activity according to the Account and OCFile set
 552                 setFile(file);  // reset after getting it fresh from storageManager
 553                 getSupportActionBar().setTitle(getFile().getFileName());
 554                 //if (!stateWasRecovered) {
 555                     initViewPager();
 556                 //}
 557
 558             } else {
 559                 // handled file not in the current Account
 560                 finish();
 561             }
 562         }
 563     }
 564
 565     @Override
 566     public void onBrowsedDownTo(OCFile folder) {
 567         // TODO Auto-generated method stub
 568
 569     }
 570
 571     @Override
 572     public void onTransferStateChanged(OCFile file, boolean downloading, boolean uploading) {
 573         // TODO Auto-generated method stub
 574
 575     }
 576
 577
 578     @SuppressLint("InlinedApi")
 579         private void hideSystemUI(View anchorView) {
 580         anchorView.setSystemUiVisibility(
 581                 View.SYSTEM_UI_FLAG_HIDE_NAVIGATION         // hides NAVIGATION BAR; Android >= 4.0
 582             |   View.SYSTEM_UI_FLAG_FULLSCREEN              // hides STATUS BAR;     Android >= 4.1
 583             |   View.SYSTEM_UI_FLAG_IMMERSIVE               // stays interactive;    Android >= 4.4
 584             |   View.SYSTEM_UI_FLAG_LAYOUT_STABLE           // draw full window;     Android >= 4.1
 585             |   View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN       // draw full window;     Android >= 4.1
 586             |   View.SYSTEM_UI_FLAG_LAYOUT_HIDE_NAVIGATION  // draw full window;     Android >= 4.1
 587         );
 588     }
 589
 590     @SuppressLint("InlinedApi")
 591     private void showSystemUI(View anchorView) {
 592         anchorView.setSystemUiVisibility(
 593                 View.SYSTEM_UI_FLAG_LAYOUT_STABLE           // draw full window;     Android >= 4.1
 594             |   View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN       // draw full window;     Android >= 4.1
 595             |   View.SYSTEM_UI_FLAG_LAYOUT_HIDE_NAVIGATION  // draw full window;     Android >= 4.1
 596         );
 597     }
 598
 599     /**
 600      * Checks if OS version is Honeycomb one or higher
 601      *
 602      * @return boolean
 603      */
 604     private boolean isHoneycombOrHigher() {
 605         if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.HONEYCOMB) {
 606             return true;
 607         }
 608         return false;
 609     }
 610
 611     @Override
 612     public void allFilesOption(){
 613         backToDisplayActivity();
 614         super.allFilesOption();
 615     }
 616 }