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.ViewPager;
  35 import android.support.v4.widget.DrawerLayout;
  36 import android.support.v7.app.ActionBar;
  37 import android.view.MenuItem;
  38 import android.view.View;
  39 import android.view.Window;
  40
  41 import com.ortiz.touch.ExtendedViewPager;
  42 import com.owncloud.android.R;
  43 import com.owncloud.android.authentication.AccountUtils;
  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
  92     @Override
  93     protected void onCreate(Bundle savedInstanceState) {
  94         super.onCreate(savedInstanceState);
  95
  96         requestWindowFeature(Window.FEATURE_ACTION_BAR_OVERLAY);
  97         setContentView(R.layout.preview_image_activity);
  98
  99         // Navigation Drawer
 100         initDrawer();
 101
 102         // ActionBar
 103         ActionBar actionBar = getSupportActionBar();
 104         actionBar.setIcon(DisplayUtils.getSeasonalIconId());
 105         actionBar.setDisplayHomeAsUpEnabled(true);
 106         actionBar.hide();
 107
 108         // Make sure we're running on Honeycomb or higher to use FullScreen and
 109         // Immersive Mode
 110         if (isHoneycombOrHigher()) {
 111
 112             mFullScreenAnchorView = getWindow().getDecorView();
 113             // to keep our UI controls visibility in line with system bars
 114             // visibility
 115             mFullScreenAnchorView.setOnSystemUiVisibilityChangeListener
 116                     (new View.OnSystemUiVisibilityChangeListener() {
 117                 @SuppressLint("InlinedApi")
 118                 @Override
 119                 public void onSystemUiVisibilityChange(int flags) {
 120                     boolean visible = (flags & View.SYSTEM_UI_FLAG_HIDE_NAVIGATION) == 0;
 121                     ActionBar actionBar = getSupportActionBar();
 122                     if (visible) {
 123                         actionBar.show();
 124                         mDrawerLayout.setDrawerLockMode(DrawerLayout.LOCK_MODE_UNLOCKED);
 125                     } else {
 126                         actionBar.hide();
 127                         mDrawerLayout.setDrawerLockMode(DrawerLayout.LOCK_MODE_LOCKED_CLOSED);
 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,
 145                 getFile().getRemotePath().lastIndexOf(getFile().getFileName()));
 146         OCFile parentFolder = getStorageManager().getFileByPath(parentPath);
 147         if (parentFolder == null) {
 148             // should not be necessary
 149             parentFolder = getStorageManager().getFileByPath(OCFile.ROOT_PATH);
 150         }
 151
 152         // TODO Enable when "On Device" is recovered ?
 153         mPreviewImagePagerAdapter = new PreviewImagePagerAdapter(getSupportFragmentManager(),
 154                 parentFolder, getAccount(), getStorageManager()/*, MainApp.getOnlyOnDevice()*/);
 155
 156         mViewPager = (ExtendedViewPager) findViewById(R.id.fragmentPager);
 157         int position = mHasSavedPosition ? mSavedPosition :
 158                 mPreviewImagePagerAdapter.getFilePosition(getFile());
 159         position = (position >= 0) ? position : 0;
 160         mViewPager.setAdapter(mPreviewImagePagerAdapter);
 161         mViewPager.setOnPageChangeListener(this);
 162         mViewPager.setCurrentItem(position);
 163         if (position == 0 && !getFile().isDown()) {
 164             // this is necessary because mViewPager.setCurrentItem(0) just after setting the
 165             // adapter does not result in a call to #onPageSelected(0)
 166             mRequestWaitingForBinder = true;
 167         }
 168     }
 169
 170
 171     protected void onPostCreate(Bundle savedInstanceState)  {
 172         super.onPostCreate(savedInstanceState);
 173
 174         // Trigger the initial hide() shortly after the activity has been
 175         // created, to briefly hint to the user that UI controls
 176         // are available
 177         delayedHide(INITIAL_HIDE_DELAY);
 178
 179     }
 180
 181     Handler mHideSystemUiHandler = new Handler() {
 182         @Override
 183         public void handleMessage(Message msg) {
 184             if (isHoneycombOrHigher()) {
 185                 hideSystemUI(mFullScreenAnchorView);
 186             }
 187             getSupportActionBar().hide();
 188         }
 189     };
 190
 191     private void delayedHide(int delayMillis)   {
 192         mHideSystemUiHandler.removeMessages(0);
 193         mHideSystemUiHandler.sendEmptyMessageDelayed(0, delayMillis);
 194     }
 195
 196
 197     /// handle Window Focus changes
 198     @Override
 199     public void onWindowFocusChanged(boolean hasFocus) {
 200         super.onWindowFocusChanged(hasFocus);
 201
 202         // When the window loses focus (e.g. the action overflow is shown),
 203         // cancel any pending hide action.
 204         if (!hasFocus) {
 205             mHideSystemUiHandler.removeMessages(0);
 206         }
 207     }
 208
 209
 210
 211     @Override
 212     public void onStart() {
 213         super.onStart();
 214     }
 215
 216     @Override
 217     protected void onSaveInstanceState(Bundle outState) {
 218         super.onSaveInstanceState(outState);
 219         outState.putBoolean(KEY_WAITING_FOR_BINDER, mRequestWaitingForBinder);
 220     }
 221
 222     @Override
 223     public void onRemoteOperationFinish(RemoteOperation operation, RemoteOperationResult result) {
 224         super.onRemoteOperationFinish(operation, result);
 225
 226         if (operation instanceof CreateShareOperation) {
 227             onCreateShareOperationFinish((CreateShareOperation) operation, result);
 228
 229         } else if (operation instanceof UnshareLinkOperation) {
 230             onUnshareLinkOperationFinish((UnshareLinkOperation) operation, result);
 231
 232         } else if (operation instanceof RemoveFileOperation) {
 233             finish();
 234         }
 235     }
 236
 237
 238     private void onUnshareLinkOperationFinish(UnshareLinkOperation operation,
 239                                               RemoteOperationResult result) {
 240         if (result.isSuccess()) {
 241             OCFile file = getStorageManager().getFileByPath(getFile().getRemotePath());
 242             if (file != null) {
 243                 setFile(file);
 244             }
 245             invalidateOptionsMenu();
 246         } else if  (result.getCode() == ResultCode.SHARE_NOT_FOUND) {
 247             backToDisplayActivity();
 248         }
 249
 250     }
 251
 252     private void onCreateShareOperationFinish(CreateShareOperation operation,
 253                                               RemoteOperationResult result) {
 254         if (result.isSuccess()) {
 255             OCFile file = getStorageManager().getFileByPath(getFile().getRemotePath());
 256             if (file != null) {
 257                 setFile(file);
 258             }
 259             invalidateOptionsMenu();
 260         }
 261     }
 262
 263     @Override
 264     protected ServiceConnection newTransferenceServiceConnection() {
 265         return new PreviewImageServiceConnection();
 266     }
 267
 268     /** Defines callbacks for service binding, passed to bindService() */
 269     private class PreviewImageServiceConnection implements ServiceConnection {
 270
 271         @Override
 272         public void onServiceConnected(ComponentName component, IBinder service) {
 273
 274             if (component.equals(new ComponentName(PreviewImageActivity.this,
 275                     FileDownloader.class))) {
 276                 mDownloaderBinder = (FileDownloaderBinder) service;
 277                 if (mRequestWaitingForBinder) {
 278                     mRequestWaitingForBinder = false;
 279                     Log_OC.d(TAG, "Simulating reselection of current page after connection " +
 280                             "of download binder");
 281                     onPageSelected(mViewPager.getCurrentItem());
 282                 }
 283
 284             } else if (component.equals(new ComponentName(PreviewImageActivity.this,
 285                     FileUploader.class))) {
 286                 Log_OC.d(TAG, "Upload service connected");
 287                 mUploaderBinder = (FileUploaderBinder) service;
 288             } else {
 289                 return;
 290             }
 291
 292         }
 293
 294         @Override
 295         public void onServiceDisconnected(ComponentName component) {
 296             if (component.equals(new ComponentName(PreviewImageActivity.this,
 297                     FileDownloader.class))) {
 298                 Log_OC.d(TAG, "Download service suddenly disconnected");
 299                 mDownloaderBinder = null;
 300             } else if (component.equals(new ComponentName(PreviewImageActivity.this,
 301                     FileUploader.class))) {
 302                 Log_OC.d(TAG, "Upload service suddenly disconnected");
 303                 mUploaderBinder = null;
 304             }
 305         }
 306     };
 307
 308
 309     @Override
 310     public void onStop() {
 311         super.onStop();
 312     }
 313
 314
 315     @Override
 316     public void onDestroy() {
 317         super.onDestroy();
 318     }
 319
 320     @Override
 321     public boolean onOptionsItemSelected(MenuItem item) {
 322         boolean returnValue = false;
 323
 324         switch(item.getItemId()){
 325         case android.R.id.home:
 326             backToDisplayActivity();
 327             returnValue = true;
 328             break;
 329         default:
 330                 returnValue = super.onOptionsItemSelected(item);
 331         }
 332
 333         return returnValue;
 334     }
 335
 336
 337     @Override
 338     protected void onResume() {
 339         super.onResume();
 340
 341         mDownloadFinishReceiver = new DownloadFinishReceiver();
 342
 343         IntentFilter filter = new IntentFilter(FileDownloader.getDownloadFinishMessage());
 344         filter.addAction(FileDownloader.getDownloadAddedMessage());
 345         registerReceiver(mDownloadFinishReceiver, filter);
 346     }
 347
 348     @Override
 349     protected void onPostResume() {
 350         super.onPostResume();
 351     }
 352
 353     @Override
 354     public void onPause() {
 355         if (mDownloadFinishReceiver != null){
 356             unregisterReceiver(mDownloadFinishReceiver);
 357             mDownloadFinishReceiver = null;
 358         }
 359
 360         super.onPause();
 361     }
 362
 363
 364     private void backToDisplayActivity() {
 365         finish();
 366     }
 367
 368     @Override
 369     public void showDetails(OCFile file) {
 370         Intent showDetailsIntent = new Intent(this, FileDisplayActivity.class);
 371         showDetailsIntent.setAction(FileDisplayActivity.ACTION_DETAILS);
 372         showDetailsIntent.putExtra(FileActivity.EXTRA_FILE, file);
 373         showDetailsIntent.putExtra(FileActivity.EXTRA_ACCOUNT,
 374                 AccountUtils.getCurrentOwnCloudAccount(this));
 375         startActivity(showDetailsIntent);
 376         int pos = mPreviewImagePagerAdapter.getFilePosition(file);
 377         file = mPreviewImagePagerAdapter.getFileAt(pos);
 378
 379     }
 380
 381
 382     private void requestForDownload(OCFile file) {
 383         if (mDownloaderBinder == null) {
 384             Log_OC.d(TAG, "requestForDownload called without binder to download service");
 385
 386         } else if (!mDownloaderBinder.isDownloading(getAccount(), file)) {
 387             Intent i = new Intent(this, FileDownloader.class);
 388             i.putExtra(FileDownloader.EXTRA_ACCOUNT, getAccount());
 389             i.putExtra(FileDownloader.EXTRA_FILE, file);
 390             startService(i);
 391         }
 392     }
 393
 394     /**
 395      * This method will be invoked when a new page becomes selected. Animation is not necessarily
 396      * complete.
 397      *
 398      *  @param  position        Position index of the new selected page
 399      */
 400     @Override
 401     public void onPageSelected(int position) {
 402         mSavedPosition = position;
 403         mHasSavedPosition = true;
 404         if (mDownloaderBinder == null) {
 405             mRequestWaitingForBinder = true;
 406
 407         } else {
 408             OCFile currentFile = mPreviewImagePagerAdapter.getFileAt(position);
 409             getSupportActionBar().setTitle(currentFile.getFileName());
 410             mDrawerToggle.setDrawerIndicatorEnabled(false);
 411             if (!currentFile.isDown()) {
 412                 if (!mPreviewImagePagerAdapter.pendingErrorAt(position)) {
 413                     requestForDownload(currentFile);
 414                 }
 415             }
 416
 417             // Call to reset image zoom to initial state
 418             ((PreviewImagePagerAdapter) mViewPager.getAdapter()).resetZoom();
 419         }
 420
 421     }
 422
 423     /**
 424      * Called when the scroll state changes. Useful for discovering when the user begins dragging,
 425      * when the pager is automatically settling to the current page. when it is fully stopped/idle.
 426      *
 427      * @param   state       The new scroll state (SCROLL_STATE_IDLE, _DRAGGING, _SETTLING
 428      */
 429     @Override
 430     public void onPageScrollStateChanged(int state) {
 431     }
 432
 433     /**
 434      * This method will be invoked when the current page is scrolled, either as part of a
 435      * programmatically initiated smooth scroll or a user initiated touch scroll.
 436      *
 437      * @param   position                Position index of the first page currently being displayed.
 438      *                                  Page position+1 will be visible if positionOffset is
 439      *                                  nonzero.
 440      *
 441      * @param   positionOffset          Value from [0, 1) indicating the offset from the page
 442      *                                  at position.
 443      * @param   positionOffsetPixels    Value in pixels indicating the offset from position.
 444      */
 445     @Override
 446     public void onPageScrolled(int position, float positionOffset, int positionOffsetPixels) {
 447     }
 448
 449
 450     /**
 451      * Class waiting for broadcast events from the {@link FileDownloader} service.
 452      *
 453      * Updates the UI when a download is started or finished, provided that it is relevant for the
 454      * folder displayed in the gallery.
 455      */
 456     private class DownloadFinishReceiver extends BroadcastReceiver {
 457         @Override
 458         public void onReceive(Context context, Intent intent) {
 459             String accountName = intent.getStringExtra(FileDownloader.ACCOUNT_NAME);
 460             String downloadedRemotePath = intent.getStringExtra(FileDownloader.EXTRA_REMOTE_PATH);
 461             if (getAccount().name.equals(accountName) &&
 462                     downloadedRemotePath != null) {
 463
 464                 OCFile file = getStorageManager().getFileByPath(downloadedRemotePath);
 465                 int position = mPreviewImagePagerAdapter.getFilePosition(file);
 466                 boolean downloadWasFine = intent.getBooleanExtra(
 467                         FileDownloader.EXTRA_DOWNLOAD_RESULT, false);
 468                 //boolean isOffscreen =  Math.abs((mViewPager.getCurrentItem() - position))
 469                 // <= mViewPager.getOffscreenPageLimit();
 470
 471                 if (position >= 0 &&
 472                         intent.getAction().equals(FileDownloader.getDownloadFinishMessage())) {
 473                     if (downloadWasFine) {
 474                         mPreviewImagePagerAdapter.updateFile(position, file);
 475
 476                     } else {
 477                         mPreviewImagePagerAdapter.updateWithDownloadError(position);
 478                     }
 479                     mPreviewImagePagerAdapter.notifyDataSetChanged();   // will trigger the creation
 480                                                                         // of new fragments
 481
 482                 } else {
 483                     Log_OC.d(TAG, "Download finished, but the fragment is offscreen");
 484                 }
 485
 486             }
 487             removeStickyBroadcast(intent);
 488         }
 489
 490     }
 491
 492     @SuppressLint("InlinedApi")
 493         public void toggleFullScreen() {
 494
 495         if (isHoneycombOrHigher()) {
 496
 497             boolean visible = (mFullScreenAnchorView.getSystemUiVisibility()
 498                     & View.SYSTEM_UI_FLAG_HIDE_NAVIGATION) == 0;
 499
 500             if (visible) {
 501                 hideSystemUI(mFullScreenAnchorView);
 502                 mDrawerLayout.setDrawerLockMode(DrawerLayout.LOCK_MODE_LOCKED_CLOSED);
 503                 // actionBar.hide(); // propagated through
 504                 // OnSystemUiVisibilityChangeListener()
 505             } else {
 506                 showSystemUI(mFullScreenAnchorView);
 507                 // actionBar.show(); // propagated through
 508                 // OnSystemUiVisibilityChangeListener()
 509             }
 510
 511         } else {
 512
 513             ActionBar actionBar = getSupportActionBar();
 514             if (!actionBar.isShowing()) {
 515                 actionBar.show();
 516                 mDrawerLayout.setDrawerLockMode(DrawerLayout.LOCK_MODE_UNLOCKED);
 517
 518             } else {
 519                 actionBar.hide();
 520                 mDrawerLayout.setDrawerLockMode(DrawerLayout.LOCK_MODE_LOCKED_CLOSED);
 521
 522             }
 523
 524         }
 525     }
 526
 527     @Override
 528     protected void onAccountSet(boolean stateWasRecovered) {
 529         super.onAccountSet(stateWasRecovered);
 530         if (getAccount() != null) {
 531             OCFile file = getFile();
 532             /// Validate handled file  (first image to preview)
 533             if (file == null) {
 534                 throw new IllegalStateException("Instanced with a NULL OCFile");
 535             }
 536             if (!file.isImage()) {
 537                 throw new IllegalArgumentException("Non-image file passed as argument");
 538             }
 539
 540             // Update file according to DB file, if it is possible
 541             if (file.getFileId() > FileDataStorageManager.ROOT_PARENT_ID)
 542                 file = getStorageManager().getFileById(file.getFileId());
 543
 544             if (file != null) {
 545                 /// Refresh the activity according to the Account and OCFile set
 546                 setFile(file);  // reset after getting it fresh from storageManager
 547                 getSupportActionBar().setTitle(getFile().getFileName());
 548                 //if (!stateWasRecovered) {
 549                     initViewPager();
 550                 //}
 551
 552             } else {
 553                 // handled file not in the current Account
 554                 finish();
 555             }
 556         }
 557     }
 558
 559     @Override
 560     public void onBrowsedDownTo(OCFile folder) {
 561         // TODO Auto-generated method stub
 562
 563     }
 564
 565     @Override
 566     public void onTransferStateChanged(OCFile file, boolean downloading, boolean uploading) {
 567         // TODO Auto-generated method stub
 568
 569     }
 570
 571
 572     @SuppressLint("InlinedApi")
 573         private void hideSystemUI(View anchorView) {
 574         anchorView.setSystemUiVisibility(
 575                 View.SYSTEM_UI_FLAG_HIDE_NAVIGATION         // hides NAVIGATION BAR; Android >= 4.0
 576             |   View.SYSTEM_UI_FLAG_FULLSCREEN              // hides STATUS BAR;     Android >= 4.1
 577             |   View.SYSTEM_UI_FLAG_IMMERSIVE               // stays interactive;    Android >= 4.4
 578             |   View.SYSTEM_UI_FLAG_LAYOUT_STABLE           // draw full window;     Android >= 4.1
 579             |   View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN       // draw full window;     Android >= 4.1
 580             |   View.SYSTEM_UI_FLAG_LAYOUT_HIDE_NAVIGATION  // draw full window;     Android >= 4.1
 581         );
 582     }
 583
 584     @SuppressLint("InlinedApi")
 585     private void showSystemUI(View anchorView) {
 586         anchorView.setSystemUiVisibility(
 587                 View.SYSTEM_UI_FLAG_LAYOUT_STABLE           // draw full window;     Android >= 4.1
 588             |   View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN       // draw full window;     Android >= 4.1
 589             |   View.SYSTEM_UI_FLAG_LAYOUT_HIDE_NAVIGATION  // draw full window;     Android >= 4.1
 590         );
 591     }
 592
 593     /**
 594      * Checks if OS version is Honeycomb one or higher
 595      *
 596      * @return boolean
 597      */
 598     private boolean isHoneycombOrHigher() {
 599         if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.HONEYCOMB) {
 600             return true;
 601         }
 602         return false;
 603     }
 604
 605     @Override
 606     public void allFilesOption(){
 607         backToDisplayActivity();
 608         super.allFilesOption();
 609     }
 610 }