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.content.SharedPreferences;
  30 import android.os.Build;
  31 import android.os.Bundle;
  32 import android.os.Handler;
  33 import android.os.IBinder;
  34 import android.os.Message;
  35 import android.preference.PreferenceManager;
  36 import android.support.v4.view.ViewPager;
  37 import android.view.View;
  38
  39 import com.actionbarsherlock.app.ActionBar;
  40 import com.actionbarsherlock.view.MenuItem;
  41 import com.actionbarsherlock.view.Window;
  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.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
  94     @Override
  95     protected void onCreate(Bundle savedInstanceState) {
  96         super.onCreate(savedInstanceState);
  97
  98         requestWindowFeature(Window.FEATURE_ACTION_BAR_OVERLAY);
  99         setContentView(R.layout.preview_image_activity);
 100
 101         ActionBar actionBar = getSupportActionBar();
 102         actionBar.setIcon(DisplayUtils.getSeasonalIconId());
 103         actionBar.setDisplayHomeAsUpEnabled(true);
 104         actionBar.hide();
 105
 106         // PIN CODE request
 107         if (getIntent().getExtras() != null && savedInstanceState == null && fromNotification()) {
 108             requestPinCode();
 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(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                     } else {
 127                         actionBar.hide();
 128                     }
 129                 }
 130             });
 131
 132         }
 133
 134         if (savedInstanceState != null) {
 135             mRequestWaitingForBinder = savedInstanceState.getBoolean(KEY_WAITING_FOR_BINDER);
 136         } else {
 137             mRequestWaitingForBinder = false;
 138         }
 139
 140     }
 141
 142     private void initViewPager() {
 143         // get parent from path
 144         String parentPath = getFile().getRemotePath().substring(0, getFile().getRemotePath().lastIndexOf(getFile().getFileName()));
 145         OCFile parentFolder = getStorageManager().getFileByPath(parentPath);
 146         if (parentFolder == null) {
 147             // should not be necessary
 148             parentFolder = getStorageManager().getFileByPath(OCFile.ROOT_PATH);
 149         }
 150         mPreviewImagePagerAdapter = new PreviewImagePagerAdapter(getSupportFragmentManager(), parentFolder, getAccount(), getStorageManager());
 151         mViewPager = (ExtendedViewPager) findViewById(R.id.fragmentPager);
 152         int position = mHasSavedPosition ? mSavedPosition : mPreviewImagePagerAdapter.getFilePosition(getFile());
 153         position = (position >= 0) ? position : 0;
 154         mViewPager.setAdapter(mPreviewImagePagerAdapter);
 155         mViewPager.setOnPageChangeListener(this);
 156         mViewPager.setCurrentItem(position);
 157         if (position == 0 && !getFile().isDown()) {
 158             // this is necessary because mViewPager.setCurrentItem(0) just after setting the adapter does not result in a call to #onPageSelected(0)
 159             mRequestWaitingForBinder = true;
 160         }
 161     }
 162
 163
 164     protected void onPostCreate(Bundle savedInstanceState)  {
 165         super.onPostCreate(savedInstanceState);
 166
 167         // Trigger the initial hide() shortly after the activity has been
 168         // created, to briefly hint to the user that UI controls
 169         // are available
 170         delayedHide(INITIAL_HIDE_DELAY);
 171
 172     }
 173
 174     Handler mHideSystemUiHandler = new Handler() {
 175         @Override
 176         public void handleMessage(Message msg) {
 177             if (isHoneycombOrHigher()) {
 178                 hideSystemUI(mFullScreenAnchorView);
 179             }
 180             getSupportActionBar().hide();
 181         }
 182     };
 183
 184     private void delayedHide(int delayMillis)   {
 185         mHideSystemUiHandler.removeMessages(0);
 186         mHideSystemUiHandler.sendEmptyMessageDelayed(0, delayMillis);
 187     }
 188
 189
 190     /// handle Window Focus changes
 191     @Override
 192     public void onWindowFocusChanged(boolean hasFocus) {
 193         super.onWindowFocusChanged(hasFocus);
 194
 195         // When the window loses focus (e.g. the action overflow is shown),
 196         // cancel any pending hide action.
 197         if (!hasFocus) {
 198             mHideSystemUiHandler.removeMessages(0);
 199         }
 200     }
 201
 202
 203
 204     @Override
 205     public void onStart() {
 206         super.onStart();
 207     }
 208
 209     @Override
 210     protected void onSaveInstanceState(Bundle outState) {
 211         super.onSaveInstanceState(outState);
 212         outState.putBoolean(KEY_WAITING_FOR_BINDER, mRequestWaitingForBinder);
 213     }
 214
 215     @Override
 216     public void onRemoteOperationFinish(RemoteOperation operation, RemoteOperationResult result) {
 217         super.onRemoteOperationFinish(operation, result);
 218
 219         if (operation instanceof CreateShareOperation) {
 220             onCreateShareOperationFinish((CreateShareOperation) operation, result);
 221
 222         } else if (operation instanceof UnshareLinkOperation) {
 223             onUnshareLinkOperationFinish((UnshareLinkOperation) operation, result);
 224
 225         } else if (operation instanceof RemoveFileOperation) {
 226             finish();
 227         }
 228     }
 229
 230
 231     private void onUnshareLinkOperationFinish(UnshareLinkOperation operation, RemoteOperationResult result) {
 232         if (result.isSuccess()) {
 233             OCFile file = getStorageManager().getFileByPath(getFile().getRemotePath());
 234             if (file != null) {
 235                 setFile(file);
 236             }
 237             invalidateOptionsMenu();
 238         } else if  (result.getCode() == ResultCode.SHARE_NOT_FOUND) {
 239             backToDisplayActivity();
 240         }
 241
 242     }
 243
 244     private void onCreateShareOperationFinish(CreateShareOperation operation, RemoteOperationResult result) {
 245         if (result.isSuccess()) {
 246             OCFile file = getStorageManager().getFileByPath(getFile().getRemotePath());
 247             if (file != null) {
 248                 setFile(file);
 249             }
 250             invalidateOptionsMenu();
 251         }
 252     }
 253
 254     @Override
 255     protected ServiceConnection newTransferenceServiceConnection() {
 256         return new PreviewImageServiceConnection();
 257     }
 258
 259     /** Defines callbacks for service binding, passed to bindService() */
 260     private class PreviewImageServiceConnection implements ServiceConnection {
 261
 262         @Override
 263         public void onServiceConnected(ComponentName component, IBinder service) {
 264
 265             if (component.equals(new ComponentName(PreviewImageActivity.this, FileDownloader.class))) {
 266                 mDownloaderBinder = (FileDownloaderBinder) service;
 267                 if (mRequestWaitingForBinder) {
 268                     mRequestWaitingForBinder = false;
 269                     Log_OC.d(TAG, "Simulating reselection of current page after connection of download binder");
 270                     onPageSelected(mViewPager.getCurrentItem());
 271                 }
 272
 273             } else if (component.equals(new ComponentName(PreviewImageActivity.this, FileUploader.class))) {
 274                 Log_OC.d(TAG, "Upload service connected");
 275                 mUploaderBinder = (FileUploaderBinder) service;
 276             } else {
 277                 return;
 278             }
 279
 280         }
 281
 282         @Override
 283         public void onServiceDisconnected(ComponentName component) {
 284             if (component.equals(new ComponentName(PreviewImageActivity.this, FileDownloader.class))) {
 285                 Log_OC.d(TAG, "Download service suddenly disconnected");
 286                 mDownloaderBinder = null;
 287             } else if (component.equals(new ComponentName(PreviewImageActivity.this, FileUploader.class))) {
 288                 Log_OC.d(TAG, "Upload service suddenly disconnected");
 289                 mUploaderBinder = null;
 290             }
 291         }
 292     };
 293
 294
 295     @Override
 296     public void onStop() {
 297         super.onStop();
 298     }
 299
 300
 301     @Override
 302     public void onDestroy() {
 303         super.onDestroy();
 304     }
 305
 306     @Override
 307     public boolean onOptionsItemSelected(MenuItem item) {
 308         boolean returnValue = false;
 309
 310         switch(item.getItemId()){
 311         case android.R.id.home:
 312             backToDisplayActivity();
 313             returnValue = true;
 314             break;
 315         default:
 316                 returnValue = super.onOptionsItemSelected(item);
 317         }
 318
 319         return returnValue;
 320     }
 321
 322
 323     @Override
 324     protected void onResume() {
 325         super.onResume();
 326         //Log_OC.e(TAG, "ACTIVITY, ONRESUME");
 327         mDownloadFinishReceiver = new DownloadFinishReceiver();
 328
 329         IntentFilter filter = new IntentFilter(FileDownloader.getDownloadFinishMessage());
 330         filter.addAction(FileDownloader.getDownloadAddedMessage());
 331         registerReceiver(mDownloadFinishReceiver, filter);
 332     }
 333
 334     @Override
 335     protected void onPostResume() {
 336         //Log_OC.e(TAG, "ACTIVITY, ONPOSTRESUME");
 337         super.onPostResume();
 338     }
 339
 340     @Override
 341     public void onPause() {
 342         unregisterReceiver(mDownloadFinishReceiver);
 343         mDownloadFinishReceiver = null;
 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
 532     /**
 533      * Launch an intent to request the PIN code to the user before letting him use the app
 534      */
 535     private void requestPinCode() {
 536         boolean pinStart = false;
 537         SharedPreferences appPrefs = PreferenceManager.getDefaultSharedPreferences(getApplicationContext());
 538         pinStart = appPrefs.getBoolean("set_pincode", false);
 539         if (pinStart) {
 540             Intent i = new Intent(getApplicationContext(), PinCodeActivity.class);
 541             i.putExtra(PinCodeActivity.EXTRA_ACTIVITY, "PreviewImageActivity");
 542             startActivity(i);
 543         }
 544     }
 545
 546     @Override
 547     public void onBrowsedDownTo(OCFile folder) {
 548         // TODO Auto-generated method stub
 549
 550     }
 551
 552     @Override
 553     public void onTransferStateChanged(OCFile file, boolean downloading, boolean uploading) {
 554         // TODO Auto-generated method stub
 555
 556     }
 557
 558
 559     @SuppressLint("InlinedApi")
 560         private void hideSystemUI(View anchorView) {
 561         anchorView.setSystemUiVisibility(
 562                 View.SYSTEM_UI_FLAG_HIDE_NAVIGATION         // hides NAVIGATION BAR; Android >= 4.0
 563             |   View.SYSTEM_UI_FLAG_FULLSCREEN              // hides STATUS BAR;     Android >= 4.1
 564             |   View.SYSTEM_UI_FLAG_IMMERSIVE               // stays interactive;    Android >= 4.4
 565             |   View.SYSTEM_UI_FLAG_LAYOUT_STABLE           // draw full window;     Android >= 4.1
 566             |   View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN       // draw full window;     Android >= 4.1
 567             |   View.SYSTEM_UI_FLAG_LAYOUT_HIDE_NAVIGATION  // draw full window;     Android >= 4.1
 568         );
 569     }
 570
 571     @SuppressLint("InlinedApi")
 572     private void showSystemUI(View anchorView) {
 573         anchorView.setSystemUiVisibility(
 574                 View.SYSTEM_UI_FLAG_LAYOUT_STABLE           // draw full window;     Android >= 4.1
 575             |   View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN       // draw full window;     Android >= 4.1
 576             |   View.SYSTEM_UI_FLAG_LAYOUT_HIDE_NAVIGATION  // draw full window;     Android >= 4.1
 577         );
 578     }
 579
 580     /**
 581      * Checks if OS version is Honeycomb one or higher
 582      *
 583      * @return boolean
 584      */
 585     private boolean isHoneycombOrHigher() {
 586         if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.HONEYCOMB) {
 587             return true;
 588         }
 589         return false;
 590     }
 591
 592 }