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

   1 /**
   2  *   ownCloud Android client application
   3  *
   4  *   @author David A. Velasco
   5  *   Copyright (C) 2015  ownCloud Inc.
   6  *
   7  *   This program is free software: you can redistribute it and/or modify
   8  *   it under the terms of the GNU General Public License version 2,
   9  *   as published by the Free Software Foundation.
  10  *
  11  *   This program is distributed in the hd that it will be useful,
  12  *   but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  *   GNU General Public License for more details.
  15  *
  16  *   You should have received a copy of the GNU General Public License
  17  *   along with this program.  If not, see <http://www.gnu.org/licenses/>.
  18  *
  19  */
  20 package com.owncloud.android.ui.preview;
  21
  22 import android.annotation.SuppressLint;
  23 import android.content.BroadcastReceiver;
  24 import android.content.ComponentName;
  25 import android.content.Context;
  26 import android.content.Intent;
  27 import android.content.IntentFilter;
  28 import android.content.ServiceConnection;
  29 import android.os.Build;
  30 import android.os.Bundle;
  31 import android.os.Handler;
  32 import android.os.IBinder;
  33 import android.os.Message;
  34 import android.support.v4.view.GravityCompat;
  35 import android.support.v4.view.ViewPager;
  36 import android.support.v4.widget.DrawerLayout;
  37 import android.support.v7.app.ActionBar;
  38 import android.view.MenuItem;
  39 import android.view.View;
  40 import android.view.Window;
  41
  42 import com.ortiz.touch.ExtendedViewPager;
  43 import com.owncloud.android.R;
  44 import com.owncloud.android.authentication.AccountUtils;
  45 import com.owncloud.android.datamodel.FileDataStorageManager;
  46 import com.owncloud.android.datamodel.OCFile;
  47 import com.owncloud.android.files.services.FileDownloader;
  48 import com.owncloud.android.files.services.FileDownloader.FileDownloaderBinder;
  49 import com.owncloud.android.files.services.FileUploader;
  50 import com.owncloud.android.files.services.FileUploader.FileUploaderBinder;
  51 import com.owncloud.android.lib.common.operations.OnRemoteOperationListener;
  52 import com.owncloud.android.lib.common.operations.RemoteOperation;
  53 import com.owncloud.android.lib.common.operations.RemoteOperationResult;
  54 import com.owncloud.android.lib.common.utils.Log_OC;
  55 import com.owncloud.android.operations.RemoveFileOperation;
  56 import com.owncloud.android.operations.SynchronizeFileOperation;
  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
  61
  62 /**
  63  *  Holds a swiping galley where image files contained in an ownCloud directory are shown
  64  */
  65 public class PreviewImageActivity extends FileActivity implements
  66         FileFragment.ContainerActivity,
  67         ViewPager.OnPageChangeListener, OnRemoteOperationListener {
  68
  69     public static final int DIALOG_SHORT_WAIT = 0;
  70
  71     public static final String TAG = PreviewImageActivity.class.getSimpleName();
  72
  73     public static final String KEY_WAITING_TO_PREVIEW = "WAITING_TO_PREVIEW";
  74     private static final String KEY_WAITING_FOR_BINDER = "WAITING_FOR_BINDER";
  75
  76     private static final int INITIAL_HIDE_DELAY = 0; // immediate hide
  77
  78     private ExtendedViewPager mViewPager;
  79     private PreviewImagePagerAdapter mPreviewImagePagerAdapter;
  80     private int mSavedPosition = 0;
  81     private boolean mHasSavedPosition = false;
  82
  83     private boolean mRequestWaitingForBinder;
  84
  85     private DownloadFinishReceiver mDownloadFinishReceiver;
  86
  87     private View mFullScreenAnchorView;
  88
  89
  90     @Override
  91     protected void onCreate(Bundle savedInstanceState) {
  92         requestWindowFeature(Window.FEATURE_ACTION_BAR_OVERLAY);
  93
  94         super.onCreate(savedInstanceState);
  95
  96         setContentView(R.layout.preview_image_activity);
  97
  98         // Navigation Drawer
  99         initDrawer();
 100
 101         // ActionBar
 102         ActionBar actionBar = getSupportActionBar();
 103         updateActionBarTitleAndHomeButton(null);
 104         actionBar.hide();
 105
 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
 115                     (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                         mDrawerLayout.setDrawerLockMode(DrawerLayout.LOCK_MODE_UNLOCKED);
 124                     } else {
 125                         actionBar.hide();
 126                         mDrawerLayout.setDrawerLockMode(DrawerLayout.LOCK_MODE_LOCKED_CLOSED);
 127                     }
 128                 }
 129             });
 130
 131             if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
 132                 getWindow().setStatusBarColor(getResources().getColor(R.color.owncloud_blue_dark_transparent));
 133             }
 134         }
 135
 136         if (savedInstanceState != null) {
 137             mRequestWaitingForBinder = savedInstanceState.getBoolean(KEY_WAITING_FOR_BINDER);
 138         } else {
 139             mRequestWaitingForBinder = false;
 140         }
 141
 142     }
 143
 144     private void initViewPager() {
 145         // get parent from path
 146         String parentPath = getFile().getRemotePath().substring(0,
 147                 getFile().getRemotePath().lastIndexOf(getFile().getFileName()));
 148         OCFile parentFolder = getStorageManager().getFileByPath(parentPath);
 149         if (parentFolder == null) {
 150             // should not be necessary
 151             parentFolder = getStorageManager().getFileByPath(OCFile.ROOT_PATH);
 152         }
 153
 154         // TODO Enable when "On Device" is recovered ?
 155         mPreviewImagePagerAdapter = new PreviewImagePagerAdapter(getSupportFragmentManager(),
 156                 parentFolder, getAccount(), getStorageManager()/*, MainApp.getOnlyOnDevice()*/);
 157
 158         mViewPager = (ExtendedViewPager) findViewById(R.id.fragmentPager);
 159         int position = mHasSavedPosition ? mSavedPosition :
 160                 mPreviewImagePagerAdapter.getFilePosition(getFile());
 161         position = (position >= 0) ? position : 0;
 162         mViewPager.setAdapter(mPreviewImagePagerAdapter);
 163         mViewPager.setOnPageChangeListener(this);
 164         mViewPager.setCurrentItem(position);
 165         if (position == 0 && !getFile().isDown()) {
 166             // this is necessary because mViewPager.setCurrentItem(0) just after setting the
 167             // adapter does not result in a call to #onPageSelected(0)
 168             mRequestWaitingForBinder = true;
 169         }
 170     }
 171
 172
 173     protected void onPostCreate(Bundle savedInstanceState)  {
 174         super.onPostCreate(savedInstanceState);
 175
 176         // Trigger the initial hide() shortly after the activity has been
 177         // created, to briefly hint to the user that UI controls
 178         // are available
 179         delayedHide(INITIAL_HIDE_DELAY);
 180
 181     }
 182
 183     Handler mHideSystemUiHandler = new Handler() {
 184         @Override
 185         public void handleMessage(Message msg) {
 186             if (isHoneycombOrHigher()) {
 187                 hideSystemUI(mFullScreenAnchorView);
 188             }
 189             getSupportActionBar().hide();
 190         }
 191     };
 192
 193     private void delayedHide(int delayMillis)   {
 194         mHideSystemUiHandler.removeMessages(0);
 195         mHideSystemUiHandler.sendEmptyMessageDelayed(0, delayMillis);
 196     }
 197
 198
 199     /// handle Window Focus changes
 200     @Override
 201     public void onWindowFocusChanged(boolean hasFocus) {
 202         super.onWindowFocusChanged(hasFocus);
 203
 204         // When the window loses focus (e.g. the action overflow is shown),
 205         // cancel any pending hide action.
 206         if (!hasFocus) {
 207             mHideSystemUiHandler.removeMessages(0);
 208         }
 209     }
 210
 211
 212
 213     @Override
 214     public void onStart() {
 215         super.onStart();
 216     }
 217
 218     @Override
 219     protected void onSaveInstanceState(Bundle outState) {
 220         super.onSaveInstanceState(outState);
 221         outState.putBoolean(KEY_WAITING_FOR_BINDER, mRequestWaitingForBinder);
 222     }
 223
 224     @Override
 225     public void onRemoteOperationFinish(RemoteOperation operation, RemoteOperationResult result) {
 226         super.onRemoteOperationFinish(operation, result);
 227
 228         if (operation instanceof RemoveFileOperation) {
 229             finish();
 230         } else if (operation instanceof SynchronizeFileOperation) {
 231             onSynchronizeFileOperationFinish((SynchronizeFileOperation) operation, result);
 232
 233         }
 234     }
 235
 236     private void onSynchronizeFileOperationFinish(SynchronizeFileOperation operation,
 237                                                   RemoteOperationResult result) {
 238         if (result.isSuccess()) {
 239             invalidateOptionsMenu();
 240         }
 241
 242     }
 243
 244     @Override
 245     protected ServiceConnection newTransferenceServiceConnection() {
 246         return new PreviewImageServiceConnection();
 247     }
 248
 249     /** Defines callbacks for service binding, passed to bindService() */
 250     private class PreviewImageServiceConnection implements ServiceConnection {
 251
 252         @Override
 253         public void onServiceConnected(ComponentName component, IBinder service) {
 254
 255             if (component.equals(new ComponentName(PreviewImageActivity.this,
 256                     FileDownloader.class))) {
 257                 mDownloaderBinder = (FileDownloaderBinder) service;
 258                 if (mRequestWaitingForBinder) {
 259                     mRequestWaitingForBinder = false;
 260                     Log_OC.d(TAG, "Simulating reselection of current page after connection " +
 261                             "of download binder");
 262                     onPageSelected(mViewPager.getCurrentItem());
 263                 }
 264
 265             } else if (component.equals(new ComponentName(PreviewImageActivity.this,
 266                     FileUploader.class))) {
 267                 Log_OC.d(TAG, "Upload service connected");
 268                 mUploaderBinder = (FileUploaderBinder) service;
 269             } else {
 270                 return;
 271             }
 272
 273         }
 274
 275         @Override
 276         public void onServiceDisconnected(ComponentName component) {
 277             if (component.equals(new ComponentName(PreviewImageActivity.this,
 278                     FileDownloader.class))) {
 279                 Log_OC.d(TAG, "Download service suddenly disconnected");
 280                 mDownloaderBinder = null;
 281             } else if (component.equals(new ComponentName(PreviewImageActivity.this,
 282                     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             if (mDrawerLayout.isDrawerOpen(GravityCompat.START)) {
 308                 mDrawerLayout.closeDrawer(GravityCompat.START);
 309             } else {
 310                 backToDisplayActivity();
 311             }
 312             returnValue = true;
 313             break;
 314         default:
 315                 returnValue = super.onOptionsItemSelected(item);
 316         }
 317
 318         return returnValue;
 319     }
 320
 321
 322     @Override
 323     protected void onResume() {
 324         super.onResume();
 325
 326         mDownloadFinishReceiver = new DownloadFinishReceiver();
 327
 328         IntentFilter filter = new IntentFilter(FileDownloader.getDownloadFinishMessage());
 329         filter.addAction(FileDownloader.getDownloadAddedMessage());
 330         registerReceiver(mDownloadFinishReceiver, filter);
 331     }
 332
 333     @Override
 334     protected void onPostResume() {
 335         super.onPostResume();
 336     }
 337
 338     @Override
 339     public void onPause() {
 340         if (mDownloadFinishReceiver != null){
 341             unregisterReceiver(mDownloadFinishReceiver);
 342             mDownloadFinishReceiver = null;
 343         }
 344
 345         super.onPause();
 346     }
 347
 348
 349     private void backToDisplayActivity() {
 350         finish();
 351     }
 352
 353     @Override
 354     public void showDetails(OCFile file) {
 355         Intent showDetailsIntent = new Intent(this, FileDisplayActivity.class);
 356         showDetailsIntent.setAction(FileDisplayActivity.ACTION_DETAILS);
 357         showDetailsIntent.putExtra(FileActivity.EXTRA_FILE, file);
 358         showDetailsIntent.putExtra(FileActivity.EXTRA_ACCOUNT,
 359                 AccountUtils.getCurrentOwnCloudAccount(this));
 360         startActivity(showDetailsIntent);
 361         int pos = mPreviewImagePagerAdapter.getFilePosition(file);
 362         file = mPreviewImagePagerAdapter.getFileAt(pos);
 363
 364     }
 365
 366     private void requestForDownload(OCFile file) {
 367         if (mDownloaderBinder == null) {
 368             Log_OC.d(TAG, "requestForDownload called without binder to download service");
 369
 370         } else if (!mDownloaderBinder.isDownloading(getAccount(), file)) {
 371             Intent i = new Intent(this, FileDownloader.class);
 372             i.putExtra(FileDownloader.EXTRA_ACCOUNT, getAccount());
 373             i.putExtra(FileDownloader.EXTRA_FILE, file);
 374             startService(i);
 375         }
 376     }
 377
 378     /**
 379      * This method will be invoked when a new page becomes selected. Animation is not necessarily
 380      * complete.
 381      *
 382      *  @param  position        Position index of the new selected page
 383      */
 384     @Override
 385     public void onPageSelected(int position) {
 386         mSavedPosition = position;
 387         mHasSavedPosition = true;
 388         if (mDownloaderBinder == null) {
 389             mRequestWaitingForBinder = true;
 390
 391         } else {
 392             OCFile currentFile = mPreviewImagePagerAdapter.getFileAt(position);
 393             getSupportActionBar().setTitle(currentFile.getFileName());
 394             mDrawerToggle.setDrawerIndicatorEnabled(false);
 395             if (!currentFile.isDown()) {
 396                 if (!mPreviewImagePagerAdapter.pendingErrorAt(position)) {
 397                     requestForDownload(currentFile);
 398                 }
 399             }
 400
 401             // Call to reset image zoom to initial state
 402             ((PreviewImagePagerAdapter) mViewPager.getAdapter()).resetZoom();
 403         }
 404
 405     }
 406
 407     /**
 408      * Called when the scroll state changes. Useful for discovering when the user begins dragging,
 409      * when the pager is automatically settling to the current page. when it is fully stopped/idle.
 410      *
 411      * @param   state       The new scroll state (SCROLL_STATE_IDLE, _DRAGGING, _SETTLING
 412      */
 413     @Override
 414     public void onPageScrollStateChanged(int state) {
 415     }
 416
 417     /**
 418      * This method will be invoked when the current page is scrolled, either as part of a
 419      * programmatically initiated smooth scroll or a user initiated touch scroll.
 420      *
 421      * @param   position                Position index of the first page currently being displayed.
 422      *                                  Page position+1 will be visible if positionOffset is
 423      *                                  nonzero.
 424      *
 425      * @param   positionOffset          Value from [0, 1) indicating the offset from the page
 426      *                                  at position.
 427      * @param   positionOffsetPixels    Value in pixels indicating the offset from position.
 428      */
 429     @Override
 430     public void onPageScrolled(int position, float positionOffset, int positionOffsetPixels) {
 431     }
 432
 433
 434     /**
 435      * Class waiting for broadcast events from the {@link FileDownloader} service.
 436      *
 437      * Updates the UI when a download is started or finished, provided that it is relevant for the
 438      * folder displayed in the gallery.
 439      */
 440     private class DownloadFinishReceiver extends BroadcastReceiver {
 441         @Override
 442         public void onReceive(Context context, Intent intent) {
 443             String accountName = intent.getStringExtra(FileDownloader.ACCOUNT_NAME);
 444             String downloadedRemotePath = intent.getStringExtra(FileDownloader.EXTRA_REMOTE_PATH);
 445             if (getAccount().name.equals(accountName) &&
 446                     downloadedRemotePath != null) {
 447
 448                 OCFile file = getStorageManager().getFileByPath(downloadedRemotePath);
 449                 int position = mPreviewImagePagerAdapter.getFilePosition(file);
 450                 boolean downloadWasFine = intent.getBooleanExtra(
 451                         FileDownloader.EXTRA_DOWNLOAD_RESULT, false);
 452                 //boolean isOffscreen =  Math.abs((mViewPager.getCurrentItem() - position))
 453                 // <= mViewPager.getOffscreenPageLimit();
 454
 455                 if (position >= 0 &&
 456                         intent.getAction().equals(FileDownloader.getDownloadFinishMessage())) {
 457                     if (downloadWasFine) {
 458                         mPreviewImagePagerAdapter.updateFile(position, file);
 459
 460                     } else {
 461                         mPreviewImagePagerAdapter.updateWithDownloadError(position);
 462                     }
 463                     mPreviewImagePagerAdapter.notifyDataSetChanged();   // will trigger the creation
 464                                                                         // of new fragments
 465
 466                 } else {
 467                     Log_OC.d(TAG, "Download finished, but the fragment is offscreen");
 468                 }
 469
 470             }
 471             removeStickyBroadcast(intent);
 472         }
 473
 474     }
 475
 476     @SuppressLint("InlinedApi")
 477         public void toggleFullScreen() {
 478
 479         if (isHoneycombOrHigher()) {
 480
 481             boolean visible = (mFullScreenAnchorView.getSystemUiVisibility()
 482                     & View.SYSTEM_UI_FLAG_HIDE_NAVIGATION) == 0;
 483
 484             if (visible) {
 485                 hideSystemUI(mFullScreenAnchorView);
 486                 // actionBar.hide(); // propagated through
 487                 // OnSystemUiVisibilityChangeListener()
 488             } else {
 489                 showSystemUI(mFullScreenAnchorView);
 490                 // actionBar.show(); // propagated through
 491                 // OnSystemUiVisibilityChangeListener()
 492             }
 493
 494         } else {
 495
 496             ActionBar actionBar = getSupportActionBar();
 497             if (!actionBar.isShowing()) {
 498                 actionBar.show();
 499                 mDrawerLayout.setDrawerLockMode(DrawerLayout.LOCK_MODE_UNLOCKED);
 500
 501             } else {
 502                 actionBar.hide();
 503                 mDrawerLayout.setDrawerLockMode(DrawerLayout.LOCK_MODE_LOCKED_CLOSED);
 504
 505             }
 506
 507         }
 508     }
 509
 510     @Override
 511     protected void onAccountSet(boolean stateWasRecovered) {
 512         super.onAccountSet(stateWasRecovered);
 513         if (getAccount() != null) {
 514             OCFile file = getFile();
 515             /// Validate handled file  (first image to preview)
 516             if (file == null) {
 517                 throw new IllegalStateException("Instanced with a NULL OCFile");
 518             }
 519             if (!file.isImage()) {
 520                 throw new IllegalArgumentException("Non-image file passed as argument");
 521             }
 522
 523             // Update file according to DB file, if it is possible
 524             if (file.getFileId() > FileDataStorageManager.ROOT_PARENT_ID)
 525                 file = getStorageManager().getFileById(file.getFileId());
 526
 527             if (file != null) {
 528                 /// Refresh the activity according to the Account and OCFile set
 529                 setFile(file);  // reset after getting it fresh from storageManager
 530                 getSupportActionBar().setTitle(getFile().getFileName());
 531                 //if (!stateWasRecovered) {
 532                     initViewPager();
 533                 //}
 534
 535             } else {
 536                 // handled file not in the current Account
 537                 finish();
 538             }
 539         }
 540     }
 541
 542     @Override
 543     public void onBrowsedDownTo(OCFile folder) {
 544         // TODO Auto-generated method stub
 545
 546     }
 547
 548     @Override
 549     public void onTransferStateChanged(OCFile file, boolean downloading, boolean uploading) {
 550         // TODO Auto-generated method stub
 551
 552     }
 553
 554
 555     @SuppressLint("InlinedApi")
 556         private void hideSystemUI(View anchorView) {
 557         anchorView.setSystemUiVisibility(
 558                 View.SYSTEM_UI_FLAG_HIDE_NAVIGATION         // hides NAVIGATION BAR; Android >= 4.0
 559             |   View.SYSTEM_UI_FLAG_FULLSCREEN              // hides STATUS BAR;     Android >= 4.1
 560             |   View.SYSTEM_UI_FLAG_IMMERSIVE               // stays interactive;    Android >= 4.4
 561             |   View.SYSTEM_UI_FLAG_LAYOUT_STABLE           // draw full window;     Android >= 4.1
 562             |   View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN       // draw full window;     Android >= 4.1
 563             |   View.SYSTEM_UI_FLAG_LAYOUT_HIDE_NAVIGATION  // draw full window;     Android >= 4.1
 564         );
 565     }
 566
 567     @SuppressLint("InlinedApi")
 568     private void showSystemUI(View anchorView) {
 569         anchorView.setSystemUiVisibility(
 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     /**
 577      * Checks if OS version is Honeycomb one or higher
 578      *
 579      * @return boolean
 580      */
 581     private boolean isHoneycombOrHigher() {
 582         if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.HONEYCOMB) {
 583             return true;
 584         }
 585         return false;
 586     }
 587
 588     @Override
 589     public void allFilesOption(){
 590         backToDisplayActivity();
 591         super.allFilesOption();
 592     }
 593 }