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

   1 /**
   2  *   ownCloud Android client application
   3  *
   4  *   @author David A. Velasco
   5  *   Copyright (C) 2015  ownCloud Inc.
   6  *
   7  *   This program is free software: you can redistribute it and/or modify
   8  *   it under the terms of the GNU General Public License version 2,
   9  *   as published by the Free Software Foundation.
  10  *
  11  *   This program is distributed in the hope that it will be useful,
  12  *   but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  *   GNU General Public License for more details.
  15  *
  16  *   You should have received a copy of the GNU General Public License
  17  *   along with this program.  If not, see <http://www.gnu.org/licenses/>.
  18  *
  19  */
  20 package com.owncloud.android.ui.preview;
  21
  22 import android.annotation.SuppressLint;
  23 import android.content.BroadcastReceiver;
  24 import android.content.ComponentName;
  25 import android.content.Context;
  26 import android.content.Intent;
  27 import android.content.IntentFilter;
  28 import android.content.ServiceConnection;
  29 import android.os.Build;
  30 import android.os.Bundle;
  31 import android.os.Handler;
  32 import android.os.IBinder;
  33 import android.os.Message;
  34 import android.support.v4.view.ViewPager;
  35 import android.view.View;
  36
  37 import com.actionbarsherlock.app.ActionBar;
  38 import com.actionbarsherlock.view.MenuItem;
  39 import com.actionbarsherlock.view.Window;
  40 import com.ortiz.touch.ExtendedViewPager;
  41 import com.owncloud.android.R;
  42 import com.owncloud.android.authentication.AccountUtils;
  43 import com.owncloud.android.authentication.PassCodeManager;
  44 import com.owncloud.android.datamodel.FileDataStorageManager;
  45 import com.owncloud.android.datamodel.OCFile;
  46 import com.owncloud.android.files.services.FileDownloader;
  47 import com.owncloud.android.files.services.FileDownloader.FileDownloaderBinder;
  48 import com.owncloud.android.files.services.FileUploader;
  49 import com.owncloud.android.files.services.FileUploader.FileUploaderBinder;
  50 import com.owncloud.android.lib.common.operations.OnRemoteOperationListener;
  51 import com.owncloud.android.lib.common.operations.RemoteOperation;
  52 import com.owncloud.android.lib.common.operations.RemoteOperationResult;
  53 import com.owncloud.android.lib.common.operations.RemoteOperationResult.ResultCode;
  54 import com.owncloud.android.lib.common.utils.Log_OC;
  55 import com.owncloud.android.operations.CreateShareOperation;
  56 import com.owncloud.android.operations.RemoveFileOperation;
  57 import com.owncloud.android.operations.UnshareLinkOperation;
  58 import com.owncloud.android.ui.activity.FileActivity;
  59 import com.owncloud.android.ui.activity.FileDisplayActivity;
  60 import com.owncloud.android.ui.fragment.FileFragment;
  61 import com.owncloud.android.utils.DisplayUtils;
  62
  63
  64 /**
  65  *  Holds a swiping galley where image files contained in an ownCloud directory are shown
  66  */
  67 public class PreviewImageActivity extends FileActivity implements
  68  FileFragment.ContainerActivity,
  69 ViewPager.OnPageChangeListener, OnRemoteOperationListener {
  70
  71     public static final int DIALOG_SHORT_WAIT = 0;
  72
  73     public static final String TAG = PreviewImageActivity.class.getSimpleName();
  74
  75     public static final String KEY_WAITING_TO_PREVIEW = "WAITING_TO_PREVIEW";
  76     private static final String KEY_WAITING_FOR_BINDER = "WAITING_FOR_BINDER";
  77
  78     private static final int INITIAL_HIDE_DELAY = 0; // immediate hide
  79
  80     private ExtendedViewPager mViewPager;
  81     private PreviewImagePagerAdapter mPreviewImagePagerAdapter;
  82     private int mSavedPosition = 0;
  83     private boolean mHasSavedPosition = false;
  84
  85     private boolean mRequestWaitingForBinder;
  86
  87     private DownloadFinishReceiver mDownloadFinishReceiver;
  88
  89     private View mFullScreenAnchorView;
  90
  91     private Boolean mUnlocked = false;
  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         // Make sure we're running on Honeycomb or higher to use FullScreen and
 107         // Immersive Mode
 108         if (isHoneycombOrHigher()) {
 109
 110             mFullScreenAnchorView = getWindow().getDecorView();
 111             // to keep our UI controls visibility in line with system bars
 112             // visibility
 113             mFullScreenAnchorView.setOnSystemUiVisibilityChangeListener(new View.OnSystemUiVisibilityChangeListener() {
 114                 @SuppressLint("InlinedApi")
 115                 @Override
 116                 public void onSystemUiVisibilityChange(int flags) {
 117                     boolean visible = (flags & View.SYSTEM_UI_FLAG_HIDE_NAVIGATION) == 0;
 118                     ActionBar actionBar = getSupportActionBar();
 119                     if (visible) {
 120                         actionBar.show();
 121                     } else {
 122                         actionBar.hide();
 123                     }
 124                 }
 125             });
 126
 127         }
 128
 129         if (savedInstanceState != null) {
 130             mRequestWaitingForBinder = savedInstanceState.getBoolean(KEY_WAITING_FOR_BINDER);
 131         } else {
 132             mRequestWaitingForBinder = false;
 133         }
 134
 135     }
 136
 137     private void initViewPager() {
 138         // get parent from path
 139         String parentPath = getFile().getRemotePath().substring(0, getFile().getRemotePath().lastIndexOf(getFile().getFileName()));
 140         OCFile parentFolder = getStorageManager().getFileByPath(parentPath);
 141         if (parentFolder == null) {
 142             // should not be necessary
 143             parentFolder = getStorageManager().getFileByPath(OCFile.ROOT_PATH);
 144         }
 145         mPreviewImagePagerAdapter = new PreviewImagePagerAdapter(getSupportFragmentManager(), parentFolder, getAccount(), getStorageManager());
 146         mViewPager = (ExtendedViewPager) findViewById(R.id.fragmentPager);
 147         int position = mHasSavedPosition ? mSavedPosition : mPreviewImagePagerAdapter.getFilePosition(getFile());
 148         position = (position >= 0) ? position : 0;
 149         mViewPager.setAdapter(mPreviewImagePagerAdapter);
 150         mViewPager.setOnPageChangeListener(this);
 151         mViewPager.setCurrentItem(position);
 152         if (position == 0 && !getFile().isDown()) {
 153             // this is necessary because mViewPager.setCurrentItem(0) just after setting the adapter does not result in a call to #onPageSelected(0)
 154             mRequestWaitingForBinder = true;
 155         }
 156     }
 157
 158
 159     protected void onPostCreate(Bundle savedInstanceState)  {
 160         super.onPostCreate(savedInstanceState);
 161
 162         // Trigger the initial hide() shortly after the activity has been
 163         // created, to briefly hint to the user that UI controls
 164         // are available
 165         delayedHide(INITIAL_HIDE_DELAY);
 166
 167     }
 168
 169     Handler mHideSystemUiHandler = new Handler() {
 170         @Override
 171         public void handleMessage(Message msg) {
 172             if (isHoneycombOrHigher()) {
 173                 hideSystemUI(mFullScreenAnchorView);
 174             }
 175             getSupportActionBar().hide();
 176         }
 177     };
 178
 179     private void delayedHide(int delayMillis)   {
 180         mHideSystemUiHandler.removeMessages(0);
 181         mHideSystemUiHandler.sendEmptyMessageDelayed(0, delayMillis);
 182     }
 183
 184
 185     /// handle Window Focus changes
 186     @Override
 187     public void onWindowFocusChanged(boolean hasFocus) {
 188         super.onWindowFocusChanged(hasFocus);
 189
 190         // When the window loses focus (e.g. the action overflow is shown),
 191         // cancel any pending hide action.
 192         if (!hasFocus) {
 193             mHideSystemUiHandler.removeMessages(0);
 194         }
 195     }
 196
 197
 198
 199     @Override
 200     public void onStart() {
 201         super.onStart();
 202     }
 203
 204     @Override
 205     protected void onSaveInstanceState(Bundle outState) {
 206         super.onSaveInstanceState(outState);
 207         outState.putBoolean(KEY_WAITING_FOR_BINDER, mRequestWaitingForBinder);
 208     }
 209
 210     @Override
 211     public void onRemoteOperationFinish(RemoteOperation operation, RemoteOperationResult result) {
 212         super.onRemoteOperationFinish(operation, result);
 213
 214         if (operation instanceof CreateShareOperation) {
 215             onCreateShareOperationFinish((CreateShareOperation) operation, result);
 216
 217         } else if (operation instanceof UnshareLinkOperation) {
 218             onUnshareLinkOperationFinish((UnshareLinkOperation) operation, result);
 219
 220         } else if (operation instanceof RemoveFileOperation) {
 221             finish();
 222         }
 223     }
 224
 225
 226     private void onUnshareLinkOperationFinish(UnshareLinkOperation operation, RemoteOperationResult result) {
 227         if (result.isSuccess()) {
 228             OCFile file = getStorageManager().getFileByPath(getFile().getRemotePath());
 229             if (file != null) {
 230                 setFile(file);
 231             }
 232             invalidateOptionsMenu();
 233         } else if  (result.getCode() == ResultCode.SHARE_NOT_FOUND) {
 234             backToDisplayActivity();
 235         }
 236
 237     }
 238
 239     private void onCreateShareOperationFinish(CreateShareOperation operation, RemoteOperationResult result) {
 240         if (result.isSuccess()) {
 241             OCFile file = getStorageManager().getFileByPath(getFile().getRemotePath());
 242             if (file != null) {
 243                 setFile(file);
 244             }
 245             invalidateOptionsMenu();
 246         }
 247     }
 248
 249     @Override
 250     protected ServiceConnection newTransferenceServiceConnection() {
 251         return new PreviewImageServiceConnection();
 252     }
 253
 254     /** Defines callbacks for service binding, passed to bindService() */
 255     private class PreviewImageServiceConnection implements ServiceConnection {
 256
 257         @Override
 258         public void onServiceConnected(ComponentName component, IBinder service) {
 259
 260             if (component.equals(new ComponentName(PreviewImageActivity.this, FileDownloader.class))) {
 261                 mDownloaderBinder = (FileDownloaderBinder) service;
 262                 if (mRequestWaitingForBinder) {
 263                     mRequestWaitingForBinder = false;
 264                     Log_OC.d(TAG, "Simulating reselection of current page after connection of download binder");
 265                     onPageSelected(mViewPager.getCurrentItem());
 266                 }
 267
 268             } else if (component.equals(new ComponentName(PreviewImageActivity.this, FileUploader.class))) {
 269                 Log_OC.d(TAG, "Upload service connected");
 270                 mUploaderBinder = (FileUploaderBinder) service;
 271             } else {
 272                 return;
 273             }
 274
 275         }
 276
 277         @Override
 278         public void onServiceDisconnected(ComponentName component) {
 279             if (component.equals(new ComponentName(PreviewImageActivity.this, FileDownloader.class))) {
 280                 Log_OC.d(TAG, "Download service suddenly disconnected");
 281                 mDownloaderBinder = null;
 282             } else if (component.equals(new ComponentName(PreviewImageActivity.this, FileUploader.class))) {
 283                 Log_OC.d(TAG, "Upload service suddenly disconnected");
 284                 mUploaderBinder = null;
 285             }
 286         }
 287     };
 288
 289
 290     @Override
 291     public void onStop() {
 292         super.onStop();
 293     }
 294
 295
 296     @Override
 297     public void onDestroy() {
 298         super.onDestroy();
 299     }
 300
 301     @Override
 302     public boolean onOptionsItemSelected(MenuItem item) {
 303         boolean returnValue = false;
 304
 305         switch(item.getItemId()){
 306         case android.R.id.home:
 307             backToDisplayActivity();
 308             returnValue = true;
 309             break;
 310         default:
 311                 returnValue = super.onOptionsItemSelected(item);
 312         }
 313
 314         return returnValue;
 315     }
 316
 317
 318     @Override
 319     protected void onResume() {
 320         super.onResume();
 321
 322         mDownloadFinishReceiver = new DownloadFinishReceiver();
 323
 324         IntentFilter filter = new IntentFilter(FileDownloader.getDownloadFinishMessage());
 325         filter.addAction(FileDownloader.getDownloadAddedMessage());
 326         registerReceiver(mDownloadFinishReceiver, filter);
 327     }
 328
 329     @Override
 330     protected void onPostResume() {
 331         super.onPostResume();
 332     }
 333
 334     @Override
 335     public void onPause() {
 336         if (mDownloadFinishReceiver != null){
 337             unregisterReceiver(mDownloadFinishReceiver);
 338             mDownloadFinishReceiver = null;
 339         }
 340
 341         super.onPause();
 342     }
 343
 344
 345     private void backToDisplayActivity() {
 346         finish();
 347     }
 348
 349     @Override
 350     public void showDetails(OCFile file) {
 351         Intent showDetailsIntent = new Intent(this, FileDisplayActivity.class);
 352         showDetailsIntent.setAction(FileDisplayActivity.ACTION_DETAILS);
 353         showDetailsIntent.putExtra(FileActivity.EXTRA_FILE, file);
 354         showDetailsIntent.putExtra(FileActivity.EXTRA_ACCOUNT, AccountUtils.getCurrentOwnCloudAccount(this));
 355         startActivity(showDetailsIntent);
 356         int pos = mPreviewImagePagerAdapter.getFilePosition(file);
 357         file = mPreviewImagePagerAdapter.getFileAt(pos);
 358
 359     }
 360
 361
 362     private void requestForDownload(OCFile file) {
 363         if (mDownloaderBinder == null) {
 364             Log_OC.d(TAG, "requestForDownload called without binder to download service");
 365
 366         } else if (!mDownloaderBinder.isDownloading(getAccount(), file)) {
 367             Intent i = new Intent(this, FileDownloader.class);
 368             i.putExtra(FileDownloader.EXTRA_ACCOUNT, getAccount());
 369             i.putExtra(FileDownloader.EXTRA_FILE, file);
 370             startService(i);
 371         }
 372     }
 373
 374     /**
 375      * This method will be invoked when a new page becomes selected. Animation is not necessarily complete.
 376      *
 377      *  @param  Position        Position index of the new selected page
 378      */
 379     @Override
 380     public void onPageSelected(int position) {
 381         mSavedPosition = position;
 382         mHasSavedPosition = true;
 383         if (mDownloaderBinder == null) {
 384             mRequestWaitingForBinder = true;
 385
 386         } else {
 387             OCFile currentFile = mPreviewImagePagerAdapter.getFileAt(position);
 388             getSupportActionBar().setTitle(currentFile.getFileName());
 389             if (!currentFile.isDown()) {
 390                 if (!mPreviewImagePagerAdapter.pendingErrorAt(position)) {
 391                     requestForDownload(currentFile);
 392                 }
 393             }
 394
 395             // Call to reset image zoom to initial state
 396             ((PreviewImagePagerAdapter) mViewPager.getAdapter()).resetZoom();
 397         }
 398
 399     }
 400
 401     /**
 402      * Called when the scroll state changes. Useful for discovering when the user begins dragging,
 403      * when the pager is automatically settling to the current page. when it is fully stopped/idle.
 404      *
 405      * @param   State       The new scroll state (SCROLL_STATE_IDLE, _DRAGGING, _SETTLING
 406      */
 407     @Override
 408     public void onPageScrollStateChanged(int state) {
 409     }
 410
 411     /**
 412      * This method will be invoked when the current page is scrolled, either as part of a programmatically
 413      * initiated smooth scroll or a user initiated touch scroll.
 414      *
 415      * @param   position                Position index of the first page currently being displayed.
 416      *                                  Page position+1 will be visible if positionOffset is nonzero.
 417      *
 418      * @param   positionOffset          Value from [0, 1) indicating the offset from the page at position.
 419      * @param   positionOffsetPixels    Value in pixels indicating the offset from position.
 420      */
 421     @Override
 422     public void onPageScrolled(int position, float positionOffset, int positionOffsetPixels) {
 423     }
 424
 425
 426     /**
 427      * Class waiting for broadcast events from the {@link FileDownloader} service.
 428      *
 429      * Updates the UI when a download is started or finished, provided that it is relevant for the
 430      * folder displayed in the gallery.
 431      */
 432     private class DownloadFinishReceiver extends BroadcastReceiver {
 433         @Override
 434         public void onReceive(Context context, Intent intent) {
 435             String accountName = intent.getStringExtra(FileDownloader.ACCOUNT_NAME);
 436             String downloadedRemotePath = intent.getStringExtra(FileDownloader.EXTRA_REMOTE_PATH);
 437             if (getAccount().name.equals(accountName) &&
 438                     downloadedRemotePath != null) {
 439
 440                 OCFile file = getStorageManager().getFileByPath(downloadedRemotePath);
 441                 int position = mPreviewImagePagerAdapter.getFilePosition(file);
 442                 boolean downloadWasFine = intent.getBooleanExtra(FileDownloader.EXTRA_DOWNLOAD_RESULT, false);
 443                 //boolean isOffscreen =  Math.abs((mViewPager.getCurrentItem() - position)) <= mViewPager.getOffscreenPageLimit();
 444
 445                 if (position >= 0 && intent.getAction().equals(FileDownloader.getDownloadFinishMessage())) {
 446                     if (downloadWasFine) {
 447                         mPreviewImagePagerAdapter.updateFile(position, file);
 448
 449                     } else {
 450                         mPreviewImagePagerAdapter.updateWithDownloadError(position);
 451                     }
 452                     mPreviewImagePagerAdapter.notifyDataSetChanged();   // will trigger the creation of new fragments
 453
 454                 } else {
 455                     Log_OC.d(TAG, "Download finished, but the fragment is offscreen");
 456                 }
 457
 458             }
 459             removeStickyBroadcast(intent);
 460         }
 461
 462     }
 463
 464     @SuppressLint("InlinedApi")
 465         public void toggleFullScreen() {
 466
 467         if (isHoneycombOrHigher()) {
 468
 469             boolean visible = (mFullScreenAnchorView.getSystemUiVisibility()
 470                     & View.SYSTEM_UI_FLAG_HIDE_NAVIGATION) == 0;
 471
 472             if (visible) {
 473                 hideSystemUI(mFullScreenAnchorView);
 474                 // actionBar.hide(); // propagated through
 475                 // OnSystemUiVisibilityChangeListener()
 476             } else {
 477                 showSystemUI(mFullScreenAnchorView);
 478                 // actionBar.show(); // propagated through
 479                 // OnSystemUiVisibilityChangeListener()
 480             }
 481
 482         } else {
 483
 484             ActionBar actionBar = getSupportActionBar();
 485             if (!actionBar.isShowing()) {
 486                 actionBar.show();
 487
 488             } else {
 489                 actionBar.hide();
 490
 491             }
 492
 493         }
 494     }
 495
 496     @Override
 497     protected void onAccountSet(boolean stateWasRecovered) {
 498         super.onAccountSet(stateWasRecovered);
 499         if (getAccount() != null) {
 500             OCFile file = getFile();
 501             /// Validate handled file  (first image to preview)
 502             if (file == null) {
 503                 throw new IllegalStateException("Instanced with a NULL OCFile");
 504             }
 505             if (!file.isImage()) {
 506                 throw new IllegalArgumentException("Non-image file passed as argument");
 507             }
 508
 509             // Update file according to DB file, if it is possible
 510             if (file.getFileId() > FileDataStorageManager.ROOT_PARENT_ID)
 511                 file = getStorageManager().getFileById(file.getFileId());
 512
 513             if (file != null) {
 514                 /// Refresh the activity according to the Account and OCFile set
 515                 setFile(file);  // reset after getting it fresh from storageManager
 516                 getSupportActionBar().setTitle(getFile().getFileName());
 517                 //if (!stateWasRecovered) {
 518                     initViewPager();
 519                 //}
 520
 521             } else {
 522                 // handled file not in the current Account
 523                 finish();
 524             }
 525         }
 526     }
 527
 528     @Override
 529     public void onBrowsedDownTo(OCFile folder) {
 530         // TODO Auto-generated method stub
 531
 532     }
 533
 534     @Override
 535     public void onTransferStateChanged(OCFile file, boolean downloading, boolean uploading) {
 536         // TODO Auto-generated method stub
 537
 538     }
 539
 540
 541     @SuppressLint("InlinedApi")
 542         private void hideSystemUI(View anchorView) {
 543         anchorView.setSystemUiVisibility(
 544                 View.SYSTEM_UI_FLAG_HIDE_NAVIGATION         // hides NAVIGATION BAR; Android >= 4.0
 545             |   View.SYSTEM_UI_FLAG_FULLSCREEN              // hides STATUS BAR;     Android >= 4.1
 546             |   View.SYSTEM_UI_FLAG_IMMERSIVE               // stays interactive;    Android >= 4.4
 547             |   View.SYSTEM_UI_FLAG_LAYOUT_STABLE           // draw full window;     Android >= 4.1
 548             |   View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN       // draw full window;     Android >= 4.1
 549             |   View.SYSTEM_UI_FLAG_LAYOUT_HIDE_NAVIGATION  // draw full window;     Android >= 4.1
 550         );
 551     }
 552
 553     @SuppressLint("InlinedApi")
 554     private void showSystemUI(View anchorView) {
 555         anchorView.setSystemUiVisibility(
 556                 View.SYSTEM_UI_FLAG_LAYOUT_STABLE           // draw full window;     Android >= 4.1
 557             |   View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN       // draw full window;     Android >= 4.1
 558             |   View.SYSTEM_UI_FLAG_LAYOUT_HIDE_NAVIGATION  // draw full window;     Android >= 4.1
 559         );
 560     }
 561
 562     /**
 563      * Checks if OS version is Honeycomb one or higher
 564      *
 565      * @return boolean
 566      */
 567     private boolean isHoneycombOrHigher() {
 568         if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.HONEYCOMB) {
 569             return true;
 570         }
 571         return false;
 572     }
 573 }