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         updateActionBarTitleAndHomeButton();
 108
 109         // Make sure we're running on Honeycomb or higher to use FullScreen and
 110         // Immersive Mode
 111         if (isHoneycombOrHigher()) {
 112
 113             mFullScreenAnchorView = getWindow().getDecorView();
 114             // to keep our UI controls visibility in line with system bars
 115             // visibility
 116             mFullScreenAnchorView.setOnSystemUiVisibilityChangeListener
 117                     (new View.OnSystemUiVisibilityChangeListener() {
 118                 @SuppressLint("InlinedApi")
 119                 @Override
 120                 public void onSystemUiVisibilityChange(int flags) {
 121                     boolean visible = (flags & View.SYSTEM_UI_FLAG_HIDE_NAVIGATION) == 0;
 122                     ActionBar actionBar = getSupportActionBar();
 123                     if (visible) {
 124                         actionBar.show();
 125                     } else {
 126                         actionBar.hide();
 127                     }
 128                 }
 129             });
 130
 131         }
 132
 133         if (savedInstanceState != null) {
 134             mRequestWaitingForBinder = savedInstanceState.getBoolean(KEY_WAITING_FOR_BINDER);
 135         } else {
 136             mRequestWaitingForBinder = false;
 137         }
 138
 139     }
 140
 141     private void initViewPager() {
 142         // get parent from path
 143         String parentPath = getFile().getRemotePath().substring(0,
 144                 getFile().getRemotePath().lastIndexOf(getFile().getFileName()));
 145         OCFile parentFolder = getStorageManager().getFileByPath(parentPath);
 146         if (parentFolder == null) {
 147             // should not be necessary
 148             parentFolder = getStorageManager().getFileByPath(OCFile.ROOT_PATH);
 149         }
 150
 151         // TODO Enable when "On Device" is recovered ?
 152         mPreviewImagePagerAdapter = new PreviewImagePagerAdapter(getSupportFragmentManager(),
 153                 parentFolder, getAccount(), getStorageManager()/*, MainApp.getOnlyOnDevice()*/);
 154
 155         mViewPager = (ExtendedViewPager) findViewById(R.id.fragmentPager);
 156         int position = mHasSavedPosition ? mSavedPosition :
 157                 mPreviewImagePagerAdapter.getFilePosition(getFile());
 158         position = (position >= 0) ? position : 0;
 159         mViewPager.setAdapter(mPreviewImagePagerAdapter);
 160         mViewPager.setOnPageChangeListener(this);
 161         mViewPager.setCurrentItem(position);
 162         if (position == 0 && !getFile().isDown()) {
 163             // this is necessary because mViewPager.setCurrentItem(0) just after setting the
 164             // adapter does not result in a call to #onPageSelected(0)
 165             mRequestWaitingForBinder = true;
 166         }
 167     }
 168
 169
 170     protected void onPostCreate(Bundle savedInstanceState)  {
 171         super.onPostCreate(savedInstanceState);
 172
 173         // Trigger the initial hide() shortly after the activity has been
 174         // created, to briefly hint to the user that UI controls
 175         // are available
 176         delayedHide(INITIAL_HIDE_DELAY);
 177
 178     }
 179
 180     Handler mHideSystemUiHandler = new Handler() {
 181         @Override
 182         public void handleMessage(Message msg) {
 183             if (isHoneycombOrHigher()) {
 184                 hideSystemUI(mFullScreenAnchorView);
 185             }
 186             getSupportActionBar().hide();
 187         }
 188     };
 189
 190     private void delayedHide(int delayMillis)   {
 191         mHideSystemUiHandler.removeMessages(0);
 192         mHideSystemUiHandler.sendEmptyMessageDelayed(0, delayMillis);
 193     }
 194
 195
 196     /// handle Window Focus changes
 197     @Override
 198     public void onWindowFocusChanged(boolean hasFocus) {
 199         super.onWindowFocusChanged(hasFocus);
 200
 201         // When the window loses focus (e.g. the action overflow is shown),
 202         // cancel any pending hide action.
 203         if (!hasFocus) {
 204             mHideSystemUiHandler.removeMessages(0);
 205         }
 206     }
 207
 208
 209
 210     @Override
 211     public void onStart() {
 212         super.onStart();
 213     }
 214
 215     @Override
 216     protected void onSaveInstanceState(Bundle outState) {
 217         super.onSaveInstanceState(outState);
 218         outState.putBoolean(KEY_WAITING_FOR_BINDER, mRequestWaitingForBinder);
 219     }
 220
 221     @Override
 222     public void onRemoteOperationFinish(RemoteOperation operation, RemoteOperationResult result) {
 223         super.onRemoteOperationFinish(operation, result);
 224
 225         if (operation instanceof CreateShareOperation) {
 226             onCreateShareOperationFinish((CreateShareOperation) operation, result);
 227
 228         } else if (operation instanceof UnshareLinkOperation) {
 229             onUnshareLinkOperationFinish((UnshareLinkOperation) operation, result);
 230
 231         } else if (operation instanceof RemoveFileOperation) {
 232             finish();
 233         }
 234     }
 235
 236
 237     private void onUnshareLinkOperationFinish(UnshareLinkOperation operation,
 238                                               RemoteOperationResult result) {
 239         if (result.isSuccess()) {
 240             OCFile file = getStorageManager().getFileByPath(getFile().getRemotePath());
 241             if (file != null) {
 242                 setFile(file);
 243             }
 244             invalidateOptionsMenu();
 245         } else if  (result.getCode() == ResultCode.SHARE_NOT_FOUND) {
 246             backToDisplayActivity();
 247         }
 248
 249     }
 250
 251     private void onCreateShareOperationFinish(CreateShareOperation operation,
 252                                               RemoteOperationResult result) {
 253         if (result.isSuccess()) {
 254             OCFile file = getStorageManager().getFileByPath(getFile().getRemotePath());
 255             if (file != null) {
 256                 setFile(file);
 257             }
 258             invalidateOptionsMenu();
 259         }
 260     }
 261
 262     @Override
 263     protected ServiceConnection newTransferenceServiceConnection() {
 264         return new PreviewImageServiceConnection();
 265     }
 266
 267     /** Defines callbacks for service binding, passed to bindService() */
 268     private class PreviewImageServiceConnection implements ServiceConnection {
 269
 270         @Override
 271         public void onServiceConnected(ComponentName component, IBinder service) {
 272
 273             if (component.equals(new ComponentName(PreviewImageActivity.this,
 274                     FileDownloader.class))) {
 275                 mDownloaderBinder = (FileDownloaderBinder) service;
 276                 if (mRequestWaitingForBinder) {
 277                     mRequestWaitingForBinder = false;
 278                     Log_OC.d(TAG, "Simulating reselection of current page after connection " +
 279                             "of download binder");
 280                     onPageSelected(mViewPager.getCurrentItem());
 281                 }
 282
 283             } else if (component.equals(new ComponentName(PreviewImageActivity.this,
 284                     FileUploader.class))) {
 285                 Log_OC.d(TAG, "Upload service connected");
 286                 mUploaderBinder = (FileUploaderBinder) service;
 287             } else {
 288                 return;
 289             }
 290
 291         }
 292
 293         @Override
 294         public void onServiceDisconnected(ComponentName component) {
 295             if (component.equals(new ComponentName(PreviewImageActivity.this,
 296                     FileDownloader.class))) {
 297                 Log_OC.d(TAG, "Download service suddenly disconnected");
 298                 mDownloaderBinder = null;
 299             } else if (component.equals(new ComponentName(PreviewImageActivity.this,
 300                     FileUploader.class))) {
 301                 Log_OC.d(TAG, "Upload service suddenly disconnected");
 302                 mUploaderBinder = null;
 303             }
 304         }
 305     };
 306
 307
 308     @Override
 309     public void onStop() {
 310         super.onStop();
 311     }
 312
 313
 314     @Override
 315     public void onDestroy() {
 316         super.onDestroy();
 317     }
 318
 319     @Override
 320     public boolean onOptionsItemSelected(MenuItem item) {
 321         boolean returnValue = false;
 322
 323         switch(item.getItemId()){
 324         case android.R.id.home:
 325             backToDisplayActivity();
 326             returnValue = true;
 327             break;
 328         default:
 329                 returnValue = super.onOptionsItemSelected(item);
 330         }
 331
 332         return returnValue;
 333     }
 334
 335
 336     @Override
 337     protected void onResume() {
 338         super.onResume();
 339
 340         mDownloadFinishReceiver = new DownloadFinishReceiver();
 341
 342         IntentFilter filter = new IntentFilter(FileDownloader.getDownloadFinishMessage());
 343         filter.addAction(FileDownloader.getDownloadAddedMessage());
 344         registerReceiver(mDownloadFinishReceiver, filter);
 345     }
 346
 347     @Override
 348     protected void onPostResume() {
 349         super.onPostResume();
 350     }
 351
 352     @Override
 353     public void onPause() {
 354         if (mDownloadFinishReceiver != null){
 355             unregisterReceiver(mDownloadFinishReceiver);
 356             mDownloadFinishReceiver = null;
 357         }
 358
 359         super.onPause();
 360     }
 361
 362
 363     private void backToDisplayActivity() {
 364         finish();
 365     }
 366
 367     @Override
 368     public void showDetails(OCFile file) {
 369         Intent showDetailsIntent = new Intent(this, FileDisplayActivity.class);
 370         showDetailsIntent.setAction(FileDisplayActivity.ACTION_DETAILS);
 371         showDetailsIntent.putExtra(FileActivity.EXTRA_FILE, file);
 372         showDetailsIntent.putExtra(FileActivity.EXTRA_ACCOUNT,
 373                 AccountUtils.getCurrentOwnCloudAccount(this));
 374         startActivity(showDetailsIntent);
 375         int pos = mPreviewImagePagerAdapter.getFilePosition(file);
 376         file = mPreviewImagePagerAdapter.getFileAt(pos);
 377
 378     }
 379
 380
 381     private void requestForDownload(OCFile file) {
 382         if (mDownloaderBinder == null) {
 383             Log_OC.d(TAG, "requestForDownload called without binder to download service");
 384
 385         } else if (!mDownloaderBinder.isDownloading(getAccount(), file)) {
 386             Intent i = new Intent(this, FileDownloader.class);
 387             i.putExtra(FileDownloader.EXTRA_ACCOUNT, getAccount());
 388             i.putExtra(FileDownloader.EXTRA_FILE, file);
 389             startService(i);
 390         }
 391     }
 392
 393     /**
 394      * This method will be invoked when a new page becomes selected. Animation is not necessarily
 395      * complete.
 396      *
 397      *  @param  position        Position index of the new selected page
 398      */
 399     @Override
 400     public void onPageSelected(int position) {
 401         mSavedPosition = position;
 402         mHasSavedPosition = true;
 403         if (mDownloaderBinder == null) {
 404             mRequestWaitingForBinder = true;
 405
 406         } else {
 407             OCFile currentFile = mPreviewImagePagerAdapter.getFileAt(position);
 408             getSupportActionBar().setTitle(currentFile.getFileName());
 409             mDrawerToggle.setDrawerIndicatorEnabled(false);
 410             if (!currentFile.isDown()) {
 411                 if (!mPreviewImagePagerAdapter.pendingErrorAt(position)) {
 412                     requestForDownload(currentFile);
 413                 }
 414             }
 415
 416             // Call to reset image zoom to initial state
 417             ((PreviewImagePagerAdapter) mViewPager.getAdapter()).resetZoom();
 418         }
 419
 420     }
 421
 422     /**
 423      * Called when the scroll state changes. Useful for discovering when the user begins dragging,
 424      * when the pager is automatically settling to the current page. when it is fully stopped/idle.
 425      *
 426      * @param   state       The new scroll state (SCROLL_STATE_IDLE, _DRAGGING, _SETTLING
 427      */
 428     @Override
 429     public void onPageScrollStateChanged(int state) {
 430     }
 431
 432     /**
 433      * This method will be invoked when the current page is scrolled, either as part of a
 434      * programmatically initiated smooth scroll or a user initiated touch scroll.
 435      *
 436      * @param   position                Position index of the first page currently being displayed.
 437      *                                  Page position+1 will be visible if positionOffset is
 438      *                                  nonzero.
 439      *
 440      * @param   positionOffset          Value from [0, 1) indicating the offset from the page
 441      *                                  at position.
 442      * @param   positionOffsetPixels    Value in pixels indicating the offset from position.
 443      */
 444     @Override
 445     public void onPageScrolled(int position, float positionOffset, int positionOffsetPixels) {
 446     }
 447
 448
 449     /**
 450      * Class waiting for broadcast events from the {@link FileDownloader} service.
 451      *
 452      * Updates the UI when a download is started or finished, provided that it is relevant for the
 453      * folder displayed in the gallery.
 454      */
 455     private class DownloadFinishReceiver extends BroadcastReceiver {
 456         @Override
 457         public void onReceive(Context context, Intent intent) {
 458             String accountName = intent.getStringExtra(FileDownloader.ACCOUNT_NAME);
 459             String downloadedRemotePath = intent.getStringExtra(FileDownloader.EXTRA_REMOTE_PATH);
 460             if (getAccount().name.equals(accountName) &&
 461                     downloadedRemotePath != null) {
 462
 463                 OCFile file = getStorageManager().getFileByPath(downloadedRemotePath);
 464                 int position = mPreviewImagePagerAdapter.getFilePosition(file);
 465                 boolean downloadWasFine = intent.getBooleanExtra(
 466                         FileDownloader.EXTRA_DOWNLOAD_RESULT, false);
 467                 //boolean isOffscreen =  Math.abs((mViewPager.getCurrentItem() - position))
 468                 // <= mViewPager.getOffscreenPageLimit();
 469
 470                 if (position >= 0 &&
 471                         intent.getAction().equals(FileDownloader.getDownloadFinishMessage())) {
 472                     if (downloadWasFine) {
 473                         mPreviewImagePagerAdapter.updateFile(position, file);
 474
 475                     } else {
 476                         mPreviewImagePagerAdapter.updateWithDownloadError(position);
 477                     }
 478                     mPreviewImagePagerAdapter.notifyDataSetChanged();   // will trigger the creation
 479                                                                         // of new fragments
 480
 481                 } else {
 482                     Log_OC.d(TAG, "Download finished, but the fragment is offscreen");
 483                 }
 484
 485             }
 486             removeStickyBroadcast(intent);
 487         }
 488
 489     }
 490
 491     @SuppressLint("InlinedApi")
 492         public void toggleFullScreen() {
 493
 494         if (isHoneycombOrHigher()) {
 495
 496             boolean visible = (mFullScreenAnchorView.getSystemUiVisibility()
 497                     & View.SYSTEM_UI_FLAG_HIDE_NAVIGATION) == 0;
 498
 499             if (visible) {
 500                 hideSystemUI(mFullScreenAnchorView);
 501                 // actionBar.hide(); // propagated through
 502                 // OnSystemUiVisibilityChangeListener()
 503             } else {
 504                 showSystemUI(mFullScreenAnchorView);
 505                 // actionBar.show(); // propagated through
 506                 // OnSystemUiVisibilityChangeListener()
 507             }
 508
 509         } else {
 510
 511             ActionBar actionBar = getSupportActionBar();
 512             if (!actionBar.isShowing()) {
 513                 actionBar.show();
 514
 515             } else {
 516                 actionBar.hide();
 517
 518             }
 519
 520         }
 521     }
 522
 523     @Override
 524     protected void onAccountSet(boolean stateWasRecovered) {
 525         super.onAccountSet(stateWasRecovered);
 526         if (getAccount() != null) {
 527             OCFile file = getFile();
 528             /// Validate handled file  (first image to preview)
 529             if (file == null) {
 530                 throw new IllegalStateException("Instanced with a NULL OCFile");
 531             }
 532             if (!file.isImage()) {
 533                 throw new IllegalArgumentException("Non-image file passed as argument");
 534             }
 535
 536             // Update file according to DB file, if it is possible
 537             if (file.getFileId() > FileDataStorageManager.ROOT_PARENT_ID)
 538                 file = getStorageManager().getFileById(file.getFileId());
 539
 540             if (file != null) {
 541                 /// Refresh the activity according to the Account and OCFile set
 542                 setFile(file);  // reset after getting it fresh from storageManager
 543                 getSupportActionBar().setTitle(getFile().getFileName());
 544                 //if (!stateWasRecovered) {
 545                     initViewPager();
 546                 //}
 547
 548             } else {
 549                 // handled file not in the current Account
 550                 finish();
 551             }
 552         }
 553     }
 554
 555     @Override
 556     public void onBrowsedDownTo(OCFile folder) {
 557         // TODO Auto-generated method stub
 558
 559     }
 560
 561     @Override
 562     public void onTransferStateChanged(OCFile file, boolean downloading, boolean uploading) {
 563         // TODO Auto-generated method stub
 564
 565     }
 566
 567
 568     @SuppressLint("InlinedApi")
 569         private void hideSystemUI(View anchorView) {
 570         anchorView.setSystemUiVisibility(
 571                 View.SYSTEM_UI_FLAG_HIDE_NAVIGATION         // hides NAVIGATION BAR; Android >= 4.0
 572             |   View.SYSTEM_UI_FLAG_FULLSCREEN              // hides STATUS BAR;     Android >= 4.1
 573             |   View.SYSTEM_UI_FLAG_IMMERSIVE               // stays interactive;    Android >= 4.4
 574             |   View.SYSTEM_UI_FLAG_LAYOUT_STABLE           // draw full window;     Android >= 4.1
 575             |   View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN       // draw full window;     Android >= 4.1
 576             |   View.SYSTEM_UI_FLAG_LAYOUT_HIDE_NAVIGATION  // draw full window;     Android >= 4.1
 577         );
 578     }
 579
 580     @SuppressLint("InlinedApi")
 581     private void showSystemUI(View anchorView) {
 582         anchorView.setSystemUiVisibility(
 583                 View.SYSTEM_UI_FLAG_LAYOUT_STABLE           // draw full window;     Android >= 4.1
 584             |   View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN       // draw full window;     Android >= 4.1
 585             |   View.SYSTEM_UI_FLAG_LAYOUT_HIDE_NAVIGATION  // draw full window;     Android >= 4.1
 586         );
 587     }
 588
 589     /**
 590      * Checks if OS version is Honeycomb one or higher
 591      *
 592      * @return boolean
 593      */
 594     private boolean isHoneycombOrHigher() {
 595         if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.HONEYCOMB) {
 596             return true;
 597         }
 598         return false;
 599     }
 600
 601     @Override
 602     public void allFilesOption(){
 603         backToDisplayActivity();
 604         super.allFilesOption();
 605     }
 606 }