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