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.MainApp;
  44 import com.owncloud.android.R;
  45 import com.owncloud.android.authentication.AccountUtils;
  46 import com.owncloud.android.datamodel.FileDataStorageManager;
  47 import com.owncloud.android.datamodel.OCFile;
  48 import com.owncloud.android.files.services.FileDownloader;
  49 import com.owncloud.android.files.services.FileDownloader.FileDownloaderBinder;
  50 import com.owncloud.android.files.services.FileUploader;
  51 import com.owncloud.android.files.services.FileUploader.FileUploaderBinder;
  52 import com.owncloud.android.lib.common.operations.OnRemoteOperationListener;
  53 import com.owncloud.android.lib.common.operations.RemoteOperation;
  54 import com.owncloud.android.lib.common.operations.RemoteOperationResult;
  55 import com.owncloud.android.lib.common.utils.Log_OC;
  56 import com.owncloud.android.operations.RemoveFileOperation;
  57 import com.owncloud.android.operations.SynchronizeFileOperation;
  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
  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         requestWindowFeature(Window.FEATURE_ACTION_BAR_OVERLAY);
  94
  95         super.onCreate(savedInstanceState);
  96
  97         setContentView(R.layout.preview_image_activity);
  98
  99         // Navigation Drawer
 100         initDrawer();
 101
 102         // ActionBar
 103         ActionBar actionBar = getSupportActionBar();
 104         updateActionBarTitleAndHomeButton(null);
 105         actionBar.hide();
 106
 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             if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
 133                 getWindow().setStatusBarColor(getResources().getColor(R.color.owncloud_blue_dark_transparent));
 134             }
 135         }
 136
 137         if (savedInstanceState != null) {
 138             mRequestWaitingForBinder = savedInstanceState.getBoolean(KEY_WAITING_FOR_BINDER);
 139         } else {
 140             mRequestWaitingForBinder = false;
 141         }
 142
 143     }
 144
 145     private void initViewPager() {
 146         // get parent from path
 147         String parentPath = getFile().getRemotePath().substring(0,
 148                 getFile().getRemotePath().lastIndexOf(getFile().getFileName()));
 149         OCFile parentFolder = getStorageManager().getFileByPath(parentPath);
 150         if (parentFolder == null) {
 151             // should not be necessary
 152             parentFolder = getStorageManager().getFileByPath(OCFile.ROOT_PATH);
 153         }
 154
 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
 396             // Call to reset image zoom to initial state
 397             ((PreviewImagePagerAdapter) mViewPager.getAdapter()).resetZoom();
 398         }
 399
 400     }
 401
 402     /**
 403      * Called when the scroll state changes. Useful for discovering when the user begins dragging,
 404      * when the pager is automatically settling to the current page. when it is fully stopped/idle.
 405      *
 406      * @param   state       The new scroll state (SCROLL_STATE_IDLE, _DRAGGING, _SETTLING
 407      */
 408     @Override
 409     public void onPageScrollStateChanged(int state) {
 410     }
 411
 412     /**
 413      * This method will be invoked when the current page is scrolled, either as part of a
 414      * programmatically initiated smooth scroll or a user initiated touch scroll.
 415      *
 416      * @param   position                Position index of the first page currently being displayed.
 417      *                                  Page position+1 will be visible if positionOffset is
 418      *                                  nonzero.
 419      *
 420      * @param   positionOffset          Value from [0, 1) indicating the offset from the page
 421      *                                  at position.
 422      * @param   positionOffsetPixels    Value in pixels indicating the offset from position.
 423      */
 424     @Override
 425     public void onPageScrolled(int position, float positionOffset, int positionOffsetPixels) {
 426     }
 427
 428
 429     /**
 430      * Class waiting for broadcast events from the {@link FileDownloader} service.
 431      *
 432      * Updates the UI when a download is started or finished, provided that it is relevant for the
 433      * folder displayed in the gallery.
 434      */
 435     private class DownloadFinishReceiver extends BroadcastReceiver {
 436         @Override
 437         public void onReceive(Context context, Intent intent) {
 438             String accountName = intent.getStringExtra(FileDownloader.ACCOUNT_NAME);
 439             String downloadedRemotePath = intent.getStringExtra(FileDownloader.EXTRA_REMOTE_PATH);
 440             if (getAccount().name.equals(accountName) &&
 441                     downloadedRemotePath != null) {
 442
 443                 OCFile file = getStorageManager().getFileByPath(downloadedRemotePath);
 444                 int position = mPreviewImagePagerAdapter.getFilePosition(file);
 445                 boolean downloadWasFine = intent.getBooleanExtra(
 446                         FileDownloader.EXTRA_DOWNLOAD_RESULT, false);
 447                 //boolean isOffscreen =  Math.abs((mViewPager.getCurrentItem() - position))
 448                 // <= mViewPager.getOffscreenPageLimit();
 449
 450                 if (position >= 0 &&
 451                         intent.getAction().equals(FileDownloader.getDownloadFinishMessage())) {
 452                     if (downloadWasFine) {
 453                         mPreviewImagePagerAdapter.updateFile(position, file);
 454
 455                     } else {
 456                         mPreviewImagePagerAdapter.updateWithDownloadError(position);
 457                     }
 458                     mPreviewImagePagerAdapter.notifyDataSetChanged();   // will trigger the creation
 459                                                                         // of new fragments
 460
 461                 } else {
 462                     Log_OC.d(TAG, "Download finished, but the fragment is offscreen");
 463                 }
 464
 465             }
 466             removeStickyBroadcast(intent);
 467         }
 468
 469     }
 470
 471     @SuppressLint("InlinedApi")
 472         public void toggleFullScreen() {
 473
 474         if (isHoneycombOrHigher()) {
 475
 476             boolean visible = (mFullScreenAnchorView.getSystemUiVisibility()
 477                     & View.SYSTEM_UI_FLAG_HIDE_NAVIGATION) == 0;
 478
 479             if (visible) {
 480                 hideSystemUI(mFullScreenAnchorView);
 481                 // actionBar.hide(); // propagated through
 482                 // OnSystemUiVisibilityChangeListener()
 483             } else {
 484                 showSystemUI(mFullScreenAnchorView);
 485                 // actionBar.show(); // propagated through
 486                 // OnSystemUiVisibilityChangeListener()
 487             }
 488
 489         } else {
 490
 491             ActionBar actionBar = getSupportActionBar();
 492             if (!actionBar.isShowing()) {
 493                 actionBar.show();
 494                 mDrawerLayout.setDrawerLockMode(DrawerLayout.LOCK_MODE_UNLOCKED);
 495
 496             } else {
 497                 actionBar.hide();
 498                 mDrawerLayout.setDrawerLockMode(DrawerLayout.LOCK_MODE_LOCKED_CLOSED);
 499
 500             }
 501
 502         }
 503     }
 504
 505     @Override
 506     protected void onAccountSet(boolean stateWasRecovered) {
 507         super.onAccountSet(stateWasRecovered);
 508         if (getAccount() != null) {
 509             OCFile file = getFile();
 510             /// Validate handled file  (first image to preview)
 511             if (file == null) {
 512                 throw new IllegalStateException("Instanced with a NULL OCFile");
 513             }
 514             if (!file.isImage()) {
 515                 throw new IllegalArgumentException("Non-image file passed as argument");
 516             }
 517
 518             // Update file according to DB file, if it is possible
 519             if (file.getFileId() > FileDataStorageManager.ROOT_PARENT_ID)
 520                 file = getStorageManager().getFileById(file.getFileId());
 521
 522             if (file != null) {
 523                 /// Refresh the activity according to the Account and OCFile set
 524                 setFile(file);  // reset after getting it fresh from storageManager
 525                 getSupportActionBar().setTitle(getFile().getFileName());
 526                 //if (!stateWasRecovered) {
 527                     initViewPager();
 528                 //}
 529
 530             } else {
 531                 // handled file not in the current Account
 532                 finish();
 533             }
 534         }
 535     }
 536
 537     @Override
 538     public void onBrowsedDownTo(OCFile folder) {
 539         // TODO Auto-generated method stub
 540
 541     }
 542
 543     @Override
 544     public void onTransferStateChanged(OCFile file, boolean downloading, boolean uploading) {
 545         // TODO Auto-generated method stub
 546
 547     }
 548
 549
 550     @SuppressLint("InlinedApi")
 551         private void hideSystemUI(View anchorView) {
 552         anchorView.setSystemUiVisibility(
 553                 View.SYSTEM_UI_FLAG_HIDE_NAVIGATION         // hides NAVIGATION BAR; Android >= 4.0
 554             |   View.SYSTEM_UI_FLAG_FULLSCREEN              // hides STATUS BAR;     Android >= 4.1
 555             |   View.SYSTEM_UI_FLAG_IMMERSIVE               // stays interactive;    Android >= 4.4
 556             |   View.SYSTEM_UI_FLAG_LAYOUT_STABLE           // draw full window;     Android >= 4.1
 557             |   View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN       // draw full window;     Android >= 4.1
 558             |   View.SYSTEM_UI_FLAG_LAYOUT_HIDE_NAVIGATION  // draw full window;     Android >= 4.1
 559         );
 560     }
 561
 562     @SuppressLint("InlinedApi")
 563     private void showSystemUI(View anchorView) {
 564         anchorView.setSystemUiVisibility(
 565                 View.SYSTEM_UI_FLAG_LAYOUT_STABLE           // draw full window;     Android >= 4.1
 566             |   View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN       // draw full window;     Android >= 4.1
 567             |   View.SYSTEM_UI_FLAG_LAYOUT_HIDE_NAVIGATION  // draw full window;     Android >= 4.1
 568         );
 569     }
 570
 571     /**
 572      * Checks if OS version is Honeycomb one or higher
 573      *
 574      * @return boolean
 575      */
 576     private boolean isHoneycombOrHigher() {
 577         if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.HONEYCOMB) {
 578             return true;
 579         }
 580         return false;
 581     }
 582
 583     @Override
 584     public void allFilesOption(){
 585         backToDisplayActivity();
 586         super.allFilesOption();
 587     }
 588 }