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         super.onCreate(savedInstanceState);
  96
  97         //requestWindowFeature(Window.FEATURE_ACTION_BAR_OVERLAY);
  98         setContentView(R.layout.preview_image_activity);
  99
 100         // Navigation Drawer
 101         initDrawer();
 102
 103         // ActionBar
 104         ActionBar actionBar = getSupportActionBar();
 105         actionBar.setIcon(DisplayUtils.getSeasonalIconId());
 106         updateActionBarTitleAndHomeButton(null);
 107         actionBar.hide();
 108
 109
 110         // Make sure we're running on Honeycomb or higher to use FullScreen and
 111         // Immersive Mode
 112         if (isHoneycombOrHigher()) {
 113
 114             mFullScreenAnchorView = getWindow().getDecorView();
 115             // to keep our UI controls visibility in line with system bars
 116             // visibility
 117             mFullScreenAnchorView.setOnSystemUiVisibilityChangeListener
 118                     (new View.OnSystemUiVisibilityChangeListener() {
 119                 @SuppressLint("InlinedApi")
 120                 @Override
 121                 public void onSystemUiVisibilityChange(int flags) {
 122                     boolean visible = (flags & View.SYSTEM_UI_FLAG_HIDE_NAVIGATION) == 0;
 123                     ActionBar actionBar = getSupportActionBar();
 124                     if (visible) {
 125                         actionBar.show();
 126                         mDrawerLayout.setDrawerLockMode(DrawerLayout.LOCK_MODE_UNLOCKED);
 127                     } else {
 128                         actionBar.hide();
 129                         mDrawerLayout.setDrawerLockMode(DrawerLayout.LOCK_MODE_LOCKED_CLOSED);
 130                     }
 131                 }
 132             });
 133
 134         }
 135
 136         if (savedInstanceState != null) {
 137             mRequestWaitingForBinder = savedInstanceState.getBoolean(KEY_WAITING_FOR_BINDER);
 138         } else {
 139             mRequestWaitingForBinder = false;
 140         }
 141
 142     }
 143
 144     private void initViewPager() {
 145         // get parent from path
 146         String parentPath = getFile().getRemotePath().substring(0,
 147                 getFile().getRemotePath().lastIndexOf(getFile().getFileName()));
 148         OCFile parentFolder = getStorageManager().getFileByPath(parentPath);
 149         if (parentFolder == null) {
 150             // should not be necessary
 151             parentFolder = getStorageManager().getFileByPath(OCFile.ROOT_PATH);
 152         }
 153
 154         // TODO Enable when "On Device" is recovered ?
 155         mPreviewImagePagerAdapter = new PreviewImagePagerAdapter(getSupportFragmentManager(),
 156                 parentFolder, getAccount(), getStorageManager()/*, MainApp.getOnlyOnDevice()*/);
 157
 158         mViewPager = (ExtendedViewPager) findViewById(R.id.fragmentPager);
 159         int position = mHasSavedPosition ? mSavedPosition :
 160                 mPreviewImagePagerAdapter.getFilePosition(getFile());
 161         position = (position >= 0) ? position : 0;
 162         mViewPager.setAdapter(mPreviewImagePagerAdapter);
 163         mViewPager.setOnPageChangeListener(this);
 164         mViewPager.setCurrentItem(position);
 165         if (position == 0 && !getFile().isDown()) {
 166             // this is necessary because mViewPager.setCurrentItem(0) just after setting the
 167             // adapter does not result in a call to #onPageSelected(0)
 168             mRequestWaitingForBinder = true;
 169         }
 170     }
 171
 172
 173     protected void onPostCreate(Bundle savedInstanceState)  {
 174         super.onPostCreate(savedInstanceState);
 175
 176         // Trigger the initial hide() shortly after the activity has been
 177         // created, to briefly hint to the user that UI controls
 178         // are available
 179         delayedHide(INITIAL_HIDE_DELAY);
 180
 181     }
 182
 183     Handler mHideSystemUiHandler = new Handler() {
 184         @Override
 185         public void handleMessage(Message msg) {
 186             if (isHoneycombOrHigher()) {
 187                 hideSystemUI(mFullScreenAnchorView);
 188             }
 189             getSupportActionBar().hide();
 190         }
 191     };
 192
 193     private void delayedHide(int delayMillis)   {
 194         mHideSystemUiHandler.removeMessages(0);
 195         mHideSystemUiHandler.sendEmptyMessageDelayed(0, delayMillis);
 196     }
 197
 198
 199     /// handle Window Focus changes
 200     @Override
 201     public void onWindowFocusChanged(boolean hasFocus) {
 202         super.onWindowFocusChanged(hasFocus);
 203
 204         // When the window loses focus (e.g. the action overflow is shown),
 205         // cancel any pending hide action.
 206         if (!hasFocus) {
 207             mHideSystemUiHandler.removeMessages(0);
 208         }
 209     }
 210
 211
 212
 213     @Override
 214     public void onStart() {
 215         super.onStart();
 216     }
 217
 218     @Override
 219     protected void onSaveInstanceState(Bundle outState) {
 220         super.onSaveInstanceState(outState);
 221         outState.putBoolean(KEY_WAITING_FOR_BINDER, mRequestWaitingForBinder);
 222     }
 223
 224     @Override
 225     public void onRemoteOperationFinish(RemoteOperation operation, RemoteOperationResult result) {
 226         super.onRemoteOperationFinish(operation, result);
 227
 228         if (operation instanceof CreateShareOperation) {
 229             onCreateShareOperationFinish((CreateShareOperation) operation, result);
 230
 231         } else if (operation instanceof UnshareLinkOperation) {
 232             onUnshareLinkOperationFinish((UnshareLinkOperation) operation, result);
 233
 234         } else if (operation instanceof RemoveFileOperation) {
 235             finish();
 236         }
 237     }
 238
 239
 240     private void onUnshareLinkOperationFinish(UnshareLinkOperation operation,
 241                                               RemoteOperationResult result) {
 242         if (result.isSuccess()) {
 243             OCFile file = getStorageManager().getFileByPath(getFile().getRemotePath());
 244             if (file != null) {
 245                 setFile(file);
 246             }
 247             invalidateOptionsMenu();
 248         } else if  (result.getCode() == ResultCode.SHARE_NOT_FOUND) {
 249             backToDisplayActivity();
 250         }
 251
 252     }
 253
 254     private void onCreateShareOperationFinish(CreateShareOperation operation,
 255                                               RemoteOperationResult result) {
 256         if (result.isSuccess()) {
 257             OCFile file = getStorageManager().getFileByPath(getFile().getRemotePath());
 258             if (file != null) {
 259                 setFile(file);
 260             }
 261             invalidateOptionsMenu();
 262         }
 263     }
 264
 265     @Override
 266     protected ServiceConnection newTransferenceServiceConnection() {
 267         return new PreviewImageServiceConnection();
 268     }
 269
 270     /** Defines callbacks for service binding, passed to bindService() */
 271     private class PreviewImageServiceConnection implements ServiceConnection {
 272
 273         @Override
 274         public void onServiceConnected(ComponentName component, IBinder service) {
 275
 276             if (component.equals(new ComponentName(PreviewImageActivity.this,
 277                     FileDownloader.class))) {
 278                 mDownloaderBinder = (FileDownloaderBinder) service;
 279                 if (mRequestWaitingForBinder) {
 280                     mRequestWaitingForBinder = false;
 281                     Log_OC.d(TAG, "Simulating reselection of current page after connection " +
 282                             "of download binder");
 283                     onPageSelected(mViewPager.getCurrentItem());
 284                 }
 285
 286             } else if (component.equals(new ComponentName(PreviewImageActivity.this,
 287                     FileUploader.class))) {
 288                 Log_OC.d(TAG, "Upload service connected");
 289                 mUploaderBinder = (FileUploaderBinder) service;
 290             } else {
 291                 return;
 292             }
 293
 294         }
 295
 296         @Override
 297         public void onServiceDisconnected(ComponentName component) {
 298             if (component.equals(new ComponentName(PreviewImageActivity.this,
 299                     FileDownloader.class))) {
 300                 Log_OC.d(TAG, "Download service suddenly disconnected");
 301                 mDownloaderBinder = null;
 302             } else if (component.equals(new ComponentName(PreviewImageActivity.this,
 303                     FileUploader.class))) {
 304                 Log_OC.d(TAG, "Upload service suddenly disconnected");
 305                 mUploaderBinder = null;
 306             }
 307         }
 308     };
 309
 310
 311     @Override
 312     public void onStop() {
 313         super.onStop();
 314     }
 315
 316
 317     @Override
 318     public void onDestroy() {
 319         super.onDestroy();
 320     }
 321
 322     @Override
 323     public boolean onOptionsItemSelected(MenuItem item) {
 324         boolean returnValue = false;
 325
 326         switch(item.getItemId()){
 327         case android.R.id.home:
 328             if (mDrawerLayout.isDrawerOpen(GravityCompat.START)) {
 329                 mDrawerLayout.closeDrawer(GravityCompat.START);
 330             } else {
 331                 backToDisplayActivity();
 332             }
 333             returnValue = true;
 334             break;
 335         default:
 336                 returnValue = super.onOptionsItemSelected(item);
 337         }
 338
 339         return returnValue;
 340     }
 341
 342
 343     @Override
 344     protected void onResume() {
 345         super.onResume();
 346
 347         mDownloadFinishReceiver = new DownloadFinishReceiver();
 348
 349         IntentFilter filter = new IntentFilter(FileDownloader.getDownloadFinishMessage());
 350         filter.addAction(FileDownloader.getDownloadAddedMessage());
 351         registerReceiver(mDownloadFinishReceiver, filter);
 352     }
 353
 354     @Override
 355     protected void onPostResume() {
 356         super.onPostResume();
 357     }
 358
 359     @Override
 360     public void onPause() {
 361         if (mDownloadFinishReceiver != null){
 362             unregisterReceiver(mDownloadFinishReceiver);
 363             mDownloadFinishReceiver = null;
 364         }
 365
 366         super.onPause();
 367     }
 368
 369
 370     private void backToDisplayActivity() {
 371         finish();
 372     }
 373
 374     @Override
 375     public void showDetails(OCFile file) {
 376         Intent showDetailsIntent = new Intent(this, FileDisplayActivity.class);
 377         showDetailsIntent.setAction(FileDisplayActivity.ACTION_DETAILS);
 378         showDetailsIntent.putExtra(FileActivity.EXTRA_FILE, file);
 379         showDetailsIntent.putExtra(FileActivity.EXTRA_ACCOUNT,
 380                 AccountUtils.getCurrentOwnCloudAccount(this));
 381         startActivity(showDetailsIntent);
 382         int pos = mPreviewImagePagerAdapter.getFilePosition(file);
 383         file = mPreviewImagePagerAdapter.getFileAt(pos);
 384
 385     }
 386
 387
 388     private void requestForDownload(OCFile file) {
 389         if (mDownloaderBinder == null) {
 390             Log_OC.d(TAG, "requestForDownload called without binder to download service");
 391
 392         } else if (!mDownloaderBinder.isDownloading(getAccount(), file)) {
 393             Intent i = new Intent(this, FileDownloader.class);
 394             i.putExtra(FileDownloader.EXTRA_ACCOUNT, getAccount());
 395             i.putExtra(FileDownloader.EXTRA_FILE, file);
 396             startService(i);
 397         }
 398     }
 399
 400     /**
 401      * This method will be invoked when a new page becomes selected. Animation is not necessarily
 402      * complete.
 403      *
 404      *  @param  position        Position index of the new selected page
 405      */
 406     @Override
 407     public void onPageSelected(int position) {
 408         mSavedPosition = position;
 409         mHasSavedPosition = true;
 410         if (mDownloaderBinder == null) {
 411             mRequestWaitingForBinder = true;
 412
 413         } else {
 414             OCFile currentFile = mPreviewImagePagerAdapter.getFileAt(position);
 415             getSupportActionBar().setTitle(currentFile.getFileName());
 416             mDrawerToggle.setDrawerIndicatorEnabled(false);
 417             if (!currentFile.isDown()) {
 418                 if (!mPreviewImagePagerAdapter.pendingErrorAt(position)) {
 419                     requestForDownload(currentFile);
 420                 }
 421             }
 422
 423             // Call to reset image zoom to initial state
 424             ((PreviewImagePagerAdapter) mViewPager.getAdapter()).resetZoom();
 425         }
 426
 427     }
 428
 429     /**
 430      * Called when the scroll state changes. Useful for discovering when the user begins dragging,
 431      * when the pager is automatically settling to the current page. when it is fully stopped/idle.
 432      *
 433      * @param   state       The new scroll state (SCROLL_STATE_IDLE, _DRAGGING, _SETTLING
 434      */
 435     @Override
 436     public void onPageScrollStateChanged(int state) {
 437     }
 438
 439     /**
 440      * This method will be invoked when the current page is scrolled, either as part of a
 441      * programmatically initiated smooth scroll or a user initiated touch scroll.
 442      *
 443      * @param   position                Position index of the first page currently being displayed.
 444      *                                  Page position+1 will be visible if positionOffset is
 445      *                                  nonzero.
 446      *
 447      * @param   positionOffset          Value from [0, 1) indicating the offset from the page
 448      *                                  at position.
 449      * @param   positionOffsetPixels    Value in pixels indicating the offset from position.
 450      */
 451     @Override
 452     public void onPageScrolled(int position, float positionOffset, int positionOffsetPixels) {
 453     }
 454
 455
 456     /**
 457      * Class waiting for broadcast events from the {@link FileDownloader} service.
 458      *
 459      * Updates the UI when a download is started or finished, provided that it is relevant for the
 460      * folder displayed in the gallery.
 461      */
 462     private class DownloadFinishReceiver extends BroadcastReceiver {
 463         @Override
 464         public void onReceive(Context context, Intent intent) {
 465             String accountName = intent.getStringExtra(FileDownloader.ACCOUNT_NAME);
 466             String downloadedRemotePath = intent.getStringExtra(FileDownloader.EXTRA_REMOTE_PATH);
 467             if (getAccount().name.equals(accountName) &&
 468                     downloadedRemotePath != null) {
 469
 470                 OCFile file = getStorageManager().getFileByPath(downloadedRemotePath);
 471                 int position = mPreviewImagePagerAdapter.getFilePosition(file);
 472                 boolean downloadWasFine = intent.getBooleanExtra(
 473                         FileDownloader.EXTRA_DOWNLOAD_RESULT, false);
 474                 //boolean isOffscreen =  Math.abs((mViewPager.getCurrentItem() - position))
 475                 // <= mViewPager.getOffscreenPageLimit();
 476
 477                 if (position >= 0 &&
 478                         intent.getAction().equals(FileDownloader.getDownloadFinishMessage())) {
 479                     if (downloadWasFine) {
 480                         mPreviewImagePagerAdapter.updateFile(position, file);
 481
 482                     } else {
 483                         mPreviewImagePagerAdapter.updateWithDownloadError(position);
 484                     }
 485                     mPreviewImagePagerAdapter.notifyDataSetChanged();   // will trigger the creation
 486                                                                         // of new fragments
 487
 488                 } else {
 489                     Log_OC.d(TAG, "Download finished, but the fragment is offscreen");
 490                 }
 491
 492             }
 493             removeStickyBroadcast(intent);
 494         }
 495
 496     }
 497
 498     @SuppressLint("InlinedApi")
 499         public void toggleFullScreen() {
 500
 501         if (isHoneycombOrHigher()) {
 502
 503             boolean visible = (mFullScreenAnchorView.getSystemUiVisibility()
 504                     & View.SYSTEM_UI_FLAG_HIDE_NAVIGATION) == 0;
 505
 506             if (visible) {
 507                 hideSystemUI(mFullScreenAnchorView);
 508                 mDrawerLayout.setDrawerLockMode(DrawerLayout.LOCK_MODE_LOCKED_CLOSED);
 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 }