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