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