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.operations.RemoteOperationResult.ResultCode;
  55 import com.owncloud.android.lib.common.utils.Log_OC;
  56 import com.owncloud.android.operations.CreateShareOperation;
  57 import com.owncloud.android.operations.RemoveFileOperation;
  58 import com.owncloud.android.operations.SynchronizeFileOperation;
  59 import com.owncloud.android.operations.UnshareLinkOperation;
  60 import com.owncloud.android.ui.activity.FileActivity;
  61 import com.owncloud.android.ui.activity.FileDisplayActivity;
  62 import com.owncloud.android.ui.fragment.FileFragment;
  63 import com.owncloud.android.utils.DisplayUtils;
  64
  65
  66 /**
  67  *  Holds a swiping galley where image files contained in an ownCloud directory are shown
  68  */
  69 public class PreviewImageActivity extends FileActivity implements
  70         FileFragment.ContainerActivity,
  71         ViewPager.OnPageChangeListener, OnRemoteOperationListener {
  72
  73     public static final int DIALOG_SHORT_WAIT = 0;
  74
  75     public static final String TAG = PreviewImageActivity.class.getSimpleName();
  76
  77     public static final String KEY_WAITING_TO_PREVIEW = "WAITING_TO_PREVIEW";
  78     private static final String KEY_WAITING_FOR_BINDER = "WAITING_FOR_BINDER";
  79
  80     private static final int INITIAL_HIDE_DELAY = 0; // immediate hide
  81
  82     private ExtendedViewPager mViewPager;
  83     private PreviewImagePagerAdapter mPreviewImagePagerAdapter;
  84     private int mSavedPosition = 0;
  85     private boolean mHasSavedPosition = false;
  86
  87     private boolean mRequestWaitingForBinder;
  88
  89     private DownloadFinishReceiver mDownloadFinishReceiver;
  90
  91     private View mFullScreenAnchorView;
  92
  93
  94     @Override
  95     protected void onCreate(Bundle savedInstanceState) {
  96         requestWindowFeature(Window.FEATURE_ACTION_BAR_OVERLAY);
  97
  98         super.onCreate(savedInstanceState);
  99
 100         setContentView(R.layout.preview_image_activity);
 101
 102         // Navigation Drawer
 103         initDrawer();
 104
 105         // ActionBar
 106         ActionBar actionBar = getSupportActionBar();
 107         actionBar.setIcon(DisplayUtils.getSeasonalIconId());
 108         updateActionBarTitleAndHomeButton(null);
 109         actionBar.hide();
 110
 111
 112         // Make sure we're running on Honeycomb or higher to use FullScreen and
 113         // Immersive Mode
 114         if (isHoneycombOrHigher()) {
 115
 116             mFullScreenAnchorView = getWindow().getDecorView();
 117             // to keep our UI controls visibility in line with system bars
 118             // visibility
 119             mFullScreenAnchorView.setOnSystemUiVisibilityChangeListener
 120                     (new View.OnSystemUiVisibilityChangeListener() {
 121                 @SuppressLint("InlinedApi")
 122                 @Override
 123                 public void onSystemUiVisibilityChange(int flags) {
 124                     boolean visible = (flags & View.SYSTEM_UI_FLAG_HIDE_NAVIGATION) == 0;
 125                     ActionBar actionBar = getSupportActionBar();
 126                     if (visible) {
 127                         actionBar.show();
 128                         mDrawerLayout.setDrawerLockMode(DrawerLayout.LOCK_MODE_UNLOCKED);
 129                     } else {
 130                         actionBar.hide();
 131                         mDrawerLayout.setDrawerLockMode(DrawerLayout.LOCK_MODE_LOCKED_CLOSED);
 132                     }
 133                 }
 134             });
 135
 136         }
 137
 138         if (savedInstanceState != null) {
 139             mRequestWaitingForBinder = savedInstanceState.getBoolean(KEY_WAITING_FOR_BINDER);
 140         } else {
 141             mRequestWaitingForBinder = false;
 142         }
 143
 144     }
 145
 146     private void initViewPager() {
 147         // get parent from path
 148         String parentPath = getFile().getRemotePath().substring(0,
 149                 getFile().getRemotePath().lastIndexOf(getFile().getFileName()));
 150         OCFile parentFolder = getStorageManager().getFileByPath(parentPath);
 151         if (parentFolder == null) {
 152             // should not be necessary
 153             parentFolder = getStorageManager().getFileByPath(OCFile.ROOT_PATH);
 154         }
 155
 156         // TODO Enable when "On Device" is recovered ?
 157         mPreviewImagePagerAdapter = new PreviewImagePagerAdapter(getSupportFragmentManager(),
 158                 parentFolder, getAccount(), getStorageManager()/*, MainApp.getOnlyOnDevice()*/);
 159
 160         mViewPager = (ExtendedViewPager) findViewById(R.id.fragmentPager);
 161         int position = mHasSavedPosition ? mSavedPosition :
 162                 mPreviewImagePagerAdapter.getFilePosition(getFile());
 163         position = (position >= 0) ? position : 0;
 164         mViewPager.setAdapter(mPreviewImagePagerAdapter);
 165         mViewPager.setOnPageChangeListener(this);
 166         mViewPager.setCurrentItem(position);
 167         if (position == 0 && !getFile().isDown()) {
 168             // this is necessary because mViewPager.setCurrentItem(0) just after setting the
 169             // adapter does not result in a call to #onPageSelected(0)
 170             mRequestWaitingForBinder = true;
 171         }
 172     }
 173
 174
 175     protected void onPostCreate(Bundle savedInstanceState)  {
 176         super.onPostCreate(savedInstanceState);
 177
 178         // Trigger the initial hide() shortly after the activity has been
 179         // created, to briefly hint to the user that UI controls
 180         // are available
 181         delayedHide(INITIAL_HIDE_DELAY);
 182
 183     }
 184
 185     Handler mHideSystemUiHandler = new Handler() {
 186         @Override
 187         public void handleMessage(Message msg) {
 188             if (isHoneycombOrHigher()) {
 189                 hideSystemUI(mFullScreenAnchorView);
 190             }
 191             getSupportActionBar().hide();
 192         }
 193     };
 194
 195     private void delayedHide(int delayMillis)   {
 196         mHideSystemUiHandler.removeMessages(0);
 197         mHideSystemUiHandler.sendEmptyMessageDelayed(0, delayMillis);
 198     }
 199
 200
 201     /// handle Window Focus changes
 202     @Override
 203     public void onWindowFocusChanged(boolean hasFocus) {
 204         super.onWindowFocusChanged(hasFocus);
 205
 206         // When the window loses focus (e.g. the action overflow is shown),
 207         // cancel any pending hide action.
 208         if (!hasFocus) {
 209             mHideSystemUiHandler.removeMessages(0);
 210         }
 211     }
 212
 213
 214
 215     @Override
 216     public void onStart() {
 217         super.onStart();
 218     }
 219
 220     @Override
 221     protected void onSaveInstanceState(Bundle outState) {
 222         super.onSaveInstanceState(outState);
 223         outState.putBoolean(KEY_WAITING_FOR_BINDER, mRequestWaitingForBinder);
 224     }
 225
 226     @Override
 227     public void onRemoteOperationFinish(RemoteOperation operation, RemoteOperationResult result) {
 228         super.onRemoteOperationFinish(operation, result);
 229
 230         if (operation instanceof CreateShareOperation) {
 231             onCreateShareOperationFinish((CreateShareOperation) operation, result);
 232
 233         } else if (operation instanceof UnshareLinkOperation) {
 234             onUnshareLinkOperationFinish((UnshareLinkOperation) operation, result);
 235
 236         } else if (operation instanceof RemoveFileOperation) {
 237             finish();
 238         } else if (operation instanceof SynchronizeFileOperation) {
 239             onSynchronizeFileOperationFinish((SynchronizeFileOperation) operation, result);
 240
 241         }
 242     }
 243
 244
 245     private void onUnshareLinkOperationFinish(UnshareLinkOperation operation,
 246                                               RemoteOperationResult result) {
 247         if (result.isSuccess()) {
 248             OCFile file = getStorageManager().getFileByPath(getFile().getRemotePath());
 249             if (file != null) {
 250                 setFile(file);
 251             }
 252             invalidateOptionsMenu();
 253         } else if  (result.getCode() == ResultCode.SHARE_NOT_FOUND) {
 254             backToDisplayActivity();
 255         }
 256
 257     }
 258
 259     private void onCreateShareOperationFinish(CreateShareOperation operation,
 260                                               RemoteOperationResult result) {
 261         if (result.isSuccess()) {
 262             OCFile file = getStorageManager().getFileByPath(getFile().getRemotePath());
 263             if (file != null) {
 264                 setFile(file);
 265             }
 266             invalidateOptionsMenu();
 267         }
 268     }
 269
 270     private void onSynchronizeFileOperationFinish(SynchronizeFileOperation operation,
 271                                                   RemoteOperationResult result) {
 272         if (result.isSuccess()) {
 273             invalidateOptionsMenu();
 274         }
 275
 276     }
 277
 278     @Override
 279     protected ServiceConnection newTransferenceServiceConnection() {
 280         return new PreviewImageServiceConnection();
 281     }
 282
 283     /** Defines callbacks for service binding, passed to bindService() */
 284     private class PreviewImageServiceConnection implements ServiceConnection {
 285
 286         @Override
 287         public void onServiceConnected(ComponentName component, IBinder service) {
 288
 289             if (component.equals(new ComponentName(PreviewImageActivity.this,
 290                     FileDownloader.class))) {
 291                 mDownloaderBinder = (FileDownloaderBinder) service;
 292                 if (mRequestWaitingForBinder) {
 293                     mRequestWaitingForBinder = false;
 294                     Log_OC.d(TAG, "Simulating reselection of current page after connection " +
 295                             "of download binder");
 296                     onPageSelected(mViewPager.getCurrentItem());
 297                 }
 298
 299             } else if (component.equals(new ComponentName(PreviewImageActivity.this,
 300                     FileUploader.class))) {
 301                 Log_OC.d(TAG, "Upload service connected");
 302                 mUploaderBinder = (FileUploaderBinder) service;
 303             } else {
 304                 return;
 305             }
 306
 307         }
 308
 309         @Override
 310         public void onServiceDisconnected(ComponentName component) {
 311             if (component.equals(new ComponentName(PreviewImageActivity.this,
 312                     FileDownloader.class))) {
 313                 Log_OC.d(TAG, "Download service suddenly disconnected");
 314                 mDownloaderBinder = null;
 315             } else if (component.equals(new ComponentName(PreviewImageActivity.this,
 316                     FileUploader.class))) {
 317                 Log_OC.d(TAG, "Upload service suddenly disconnected");
 318                 mUploaderBinder = null;
 319             }
 320         }
 321     };
 322
 323
 324     @Override
 325     public void onStop() {
 326         super.onStop();
 327     }
 328
 329
 330     @Override
 331     public void onDestroy() {
 332         super.onDestroy();
 333     }
 334
 335     @Override
 336     public boolean onOptionsItemSelected(MenuItem item) {
 337         boolean returnValue = false;
 338
 339         switch(item.getItemId()){
 340         case android.R.id.home:
 341             if (mDrawerLayout.isDrawerOpen(GravityCompat.START)) {
 342                 mDrawerLayout.closeDrawer(GravityCompat.START);
 343             } else {
 344                 backToDisplayActivity();
 345             }
 346             returnValue = true;
 347             break;
 348         default:
 349                 returnValue = super.onOptionsItemSelected(item);
 350         }
 351
 352         return returnValue;
 353     }
 354
 355
 356     @Override
 357     protected void onResume() {
 358         super.onResume();
 359
 360         mDownloadFinishReceiver = new DownloadFinishReceiver();
 361
 362         IntentFilter filter = new IntentFilter(FileDownloader.getDownloadFinishMessage());
 363         filter.addAction(FileDownloader.getDownloadAddedMessage());
 364         registerReceiver(mDownloadFinishReceiver, filter);
 365     }
 366
 367     @Override
 368     protected void onPostResume() {
 369         super.onPostResume();
 370     }
 371
 372     @Override
 373     public void onPause() {
 374         if (mDownloadFinishReceiver != null){
 375             unregisterReceiver(mDownloadFinishReceiver);
 376             mDownloadFinishReceiver = null;
 377         }
 378
 379         super.onPause();
 380     }
 381
 382
 383     private void backToDisplayActivity() {
 384         finish();
 385     }
 386
 387     @Override
 388     public void showDetails(OCFile file) {
 389         Intent showDetailsIntent = new Intent(this, FileDisplayActivity.class);
 390         showDetailsIntent.setAction(FileDisplayActivity.ACTION_DETAILS);
 391         showDetailsIntent.putExtra(FileActivity.EXTRA_FILE, file);
 392         showDetailsIntent.putExtra(FileActivity.EXTRA_ACCOUNT,
 393                 AccountUtils.getCurrentOwnCloudAccount(this));
 394         startActivity(showDetailsIntent);
 395         int pos = mPreviewImagePagerAdapter.getFilePosition(file);
 396         file = mPreviewImagePagerAdapter.getFileAt(pos);
 397
 398     }
 399
 400
 401     private void requestForDownload(OCFile file) {
 402         if (mDownloaderBinder == null) {
 403             Log_OC.d(TAG, "requestForDownload called without binder to download service");
 404
 405         } else if (!mDownloaderBinder.isDownloading(getAccount(), file)) {
 406             Intent i = new Intent(this, FileDownloader.class);
 407             i.putExtra(FileDownloader.EXTRA_ACCOUNT, getAccount());
 408             i.putExtra(FileDownloader.EXTRA_FILE, file);
 409             startService(i);
 410         }
 411     }
 412
 413     /**
 414      * This method will be invoked when a new page becomes selected. Animation is not necessarily
 415      * complete.
 416      *
 417      *  @param  position        Position index of the new selected page
 418      */
 419     @Override
 420     public void onPageSelected(int position) {
 421         mSavedPosition = position;
 422         mHasSavedPosition = true;
 423         if (mDownloaderBinder == null) {
 424             mRequestWaitingForBinder = true;
 425
 426         } else {
 427             OCFile currentFile = mPreviewImagePagerAdapter.getFileAt(position);
 428             getSupportActionBar().setTitle(currentFile.getFileName());
 429             mDrawerToggle.setDrawerIndicatorEnabled(false);
 430             if (!currentFile.isDown()) {
 431                 if (!mPreviewImagePagerAdapter.pendingErrorAt(position)) {
 432                     requestForDownload(currentFile);
 433                 }
 434             }
 435
 436             // Call to reset image zoom to initial state
 437             ((PreviewImagePagerAdapter) mViewPager.getAdapter()).resetZoom();
 438         }
 439
 440     }
 441
 442     /**
 443      * Called when the scroll state changes. Useful for discovering when the user begins dragging,
 444      * when the pager is automatically settling to the current page. when it is fully stopped/idle.
 445      *
 446      * @param   state       The new scroll state (SCROLL_STATE_IDLE, _DRAGGING, _SETTLING
 447      */
 448     @Override
 449     public void onPageScrollStateChanged(int state) {
 450     }
 451
 452     /**
 453      * This method will be invoked when the current page is scrolled, either as part of a
 454      * programmatically initiated smooth scroll or a user initiated touch scroll.
 455      *
 456      * @param   position                Position index of the first page currently being displayed.
 457      *                                  Page position+1 will be visible if positionOffset is
 458      *                                  nonzero.
 459      *
 460      * @param   positionOffset          Value from [0, 1) indicating the offset from the page
 461      *                                  at position.
 462      * @param   positionOffsetPixels    Value in pixels indicating the offset from position.
 463      */
 464     @Override
 465     public void onPageScrolled(int position, float positionOffset, int positionOffsetPixels) {
 466     }
 467
 468
 469     /**
 470      * Class waiting for broadcast events from the {@link FileDownloader} service.
 471      *
 472      * Updates the UI when a download is started or finished, provided that it is relevant for the
 473      * folder displayed in the gallery.
 474      */
 475     private class DownloadFinishReceiver extends BroadcastReceiver {
 476         @Override
 477         public void onReceive(Context context, Intent intent) {
 478             String accountName = intent.getStringExtra(FileDownloader.ACCOUNT_NAME);
 479             String downloadedRemotePath = intent.getStringExtra(FileDownloader.EXTRA_REMOTE_PATH);
 480             if (getAccount().name.equals(accountName) &&
 481                     downloadedRemotePath != null) {
 482
 483                 OCFile file = getStorageManager().getFileByPath(downloadedRemotePath);
 484                 int position = mPreviewImagePagerAdapter.getFilePosition(file);
 485                 boolean downloadWasFine = intent.getBooleanExtra(
 486                         FileDownloader.EXTRA_DOWNLOAD_RESULT, false);
 487                 //boolean isOffscreen =  Math.abs((mViewPager.getCurrentItem() - position))
 488                 // <= mViewPager.getOffscreenPageLimit();
 489
 490                 if (position >= 0 &&
 491                         intent.getAction().equals(FileDownloader.getDownloadFinishMessage())) {
 492                     if (downloadWasFine) {
 493                         mPreviewImagePagerAdapter.updateFile(position, file);
 494
 495                     } else {
 496                         mPreviewImagePagerAdapter.updateWithDownloadError(position);
 497                     }
 498                     mPreviewImagePagerAdapter.notifyDataSetChanged();   // will trigger the creation
 499                                                                         // of new fragments
 500
 501                 } else {
 502                     Log_OC.d(TAG, "Download finished, but the fragment is offscreen");
 503                 }
 504
 505             }
 506             removeStickyBroadcast(intent);
 507         }
 508
 509     }
 510
 511     @SuppressLint("InlinedApi")
 512         public void toggleFullScreen() {
 513
 514         if (isHoneycombOrHigher()) {
 515
 516             boolean visible = (mFullScreenAnchorView.getSystemUiVisibility()
 517                     & View.SYSTEM_UI_FLAG_HIDE_NAVIGATION) == 0;
 518
 519             if (visible) {
 520                 hideSystemUI(mFullScreenAnchorView);
 521                 // actionBar.hide(); // propagated through
 522                 // OnSystemUiVisibilityChangeListener()
 523             } else {
 524                 showSystemUI(mFullScreenAnchorView);
 525                 // actionBar.show(); // propagated through
 526                 // OnSystemUiVisibilityChangeListener()
 527             }
 528
 529         } else {
 530
 531             ActionBar actionBar = getSupportActionBar();
 532             if (!actionBar.isShowing()) {
 533                 actionBar.show();
 534                 mDrawerLayout.setDrawerLockMode(DrawerLayout.LOCK_MODE_UNLOCKED);
 535
 536             } else {
 537                 actionBar.hide();
 538                 mDrawerLayout.setDrawerLockMode(DrawerLayout.LOCK_MODE_LOCKED_CLOSED);
 539
 540             }
 541
 542         }
 543     }
 544
 545     @Override
 546     protected void onAccountSet(boolean stateWasRecovered) {
 547         super.onAccountSet(stateWasRecovered);
 548         if (getAccount() != null) {
 549             OCFile file = getFile();
 550             /// Validate handled file  (first image to preview)
 551             if (file == null) {
 552                 throw new IllegalStateException("Instanced with a NULL OCFile");
 553             }
 554             if (!file.isImage()) {
 555                 throw new IllegalArgumentException("Non-image file passed as argument");
 556             }
 557
 558             // Update file according to DB file, if it is possible
 559             if (file.getFileId() > FileDataStorageManager.ROOT_PARENT_ID)
 560                 file = getStorageManager().getFileById(file.getFileId());
 561
 562             if (file != null) {
 563                 /// Refresh the activity according to the Account and OCFile set
 564                 setFile(file);  // reset after getting it fresh from storageManager
 565                 getSupportActionBar().setTitle(getFile().getFileName());
 566                 //if (!stateWasRecovered) {
 567                     initViewPager();
 568                 //}
 569
 570             } else {
 571                 // handled file not in the current Account
 572                 finish();
 573             }
 574         }
 575     }
 576
 577     @Override
 578     public void onBrowsedDownTo(OCFile folder) {
 579         // TODO Auto-generated method stub
 580
 581     }
 582
 583     @Override
 584     public void onTransferStateChanged(OCFile file, boolean downloading, boolean uploading) {
 585         // TODO Auto-generated method stub
 586
 587     }
 588
 589
 590     @SuppressLint("InlinedApi")
 591         private void hideSystemUI(View anchorView) {
 592         anchorView.setSystemUiVisibility(
 593                 View.SYSTEM_UI_FLAG_HIDE_NAVIGATION         // hides NAVIGATION BAR; Android >= 4.0
 594             |   View.SYSTEM_UI_FLAG_FULLSCREEN              // hides STATUS BAR;     Android >= 4.1
 595             |   View.SYSTEM_UI_FLAG_IMMERSIVE               // stays interactive;    Android >= 4.4
 596             |   View.SYSTEM_UI_FLAG_LAYOUT_STABLE           // draw full window;     Android >= 4.1
 597             |   View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN       // draw full window;     Android >= 4.1
 598             |   View.SYSTEM_UI_FLAG_LAYOUT_HIDE_NAVIGATION  // draw full window;     Android >= 4.1
 599         );
 600     }
 601
 602     @SuppressLint("InlinedApi")
 603     private void showSystemUI(View anchorView) {
 604         anchorView.setSystemUiVisibility(
 605                 View.SYSTEM_UI_FLAG_LAYOUT_STABLE           // draw full window;     Android >= 4.1
 606             |   View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN       // draw full window;     Android >= 4.1
 607             |   View.SYSTEM_UI_FLAG_LAYOUT_HIDE_NAVIGATION  // draw full window;     Android >= 4.1
 608         );
 609     }
 610
 611     /**
 612      * Checks if OS version is Honeycomb one or higher
 613      *
 614      * @return boolean
 615      */
 616     private boolean isHoneycombOrHigher() {
 617         if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.HONEYCOMB) {
 618             return true;
 619         }
 620         return false;
 621     }
 622
 623     @Override
 624     public void allFilesOption(){
 625         backToDisplayActivity();
 626         super.allFilesOption();
 627     }
 628 }