src/com/owncloud/android/ui/preview/PreviewImageActivity.java

   1 /* ownCloud Android client application
   2  *   Copyright (C) 2012-2013  ownCloud Inc.
   3  *
   4  *   This program is free software: you can redistribute it and/or modify
   5  *   it under the terms of the GNU General Public License version 2,
   6  *   as published by the Free Software Foundation.
   7  *
   8  *   This program is distributed in the hope that it will be useful,
   9  *   but WITHOUT ANY WARRANTY; without even the implied warranty of
  10  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  11  *   GNU General Public License for more details.
  12  *
  13  *   You should have received a copy of the GNU General Public License
  14  *   along with this program.  If not, see <http://www.gnu.org/licenses/>.
  15  *
  16  */
  17 package com.owncloud.android.ui.preview;
  18
  19 import android.annotation.SuppressLint;
  20 import android.content.BroadcastReceiver;
  21 import android.content.ComponentName;
  22 import android.content.Context;
  23 import android.content.Intent;
  24 import android.content.IntentFilter;
  25 import android.content.ServiceConnection;
  26 import android.media.MediaScannerConnection;
  27 import android.media.MediaScannerConnection.OnScanCompletedListener;
  28 import android.net.Uri;
  29 import android.content.SharedPreferences;
  30 import android.os.Build;
  31 import android.os.Bundle;
  32 import android.os.Handler;
  33 import android.os.IBinder;
  34 import android.os.Message;
  35 import android.preference.PreferenceManager;
  36 import android.support.v4.view.ViewPager;
  37 import android.view.View;
  38
  39 import com.actionbarsherlock.app.ActionBar;
  40 import com.actionbarsherlock.view.MenuItem;
  41 import com.actionbarsherlock.view.Window;
  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.UnshareLinkOperation;
  59 import com.owncloud.android.ui.activity.FileActivity;
  60 import com.owncloud.android.ui.activity.FileDisplayActivity;
  61 import com.owncloud.android.ui.activity.PinCodeActivity;
  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  *  @author David A. Velasco
  70  */
  71 public class PreviewImageActivity extends FileActivity implements
  72  FileFragment.ContainerActivity,
  73 ViewPager.OnPageChangeListener, OnRemoteOperationListener {
  74
  75     public static final int DIALOG_SHORT_WAIT = 0;
  76
  77     public static final String TAG = PreviewImageActivity.class.getSimpleName();
  78
  79     public static final String KEY_WAITING_TO_PREVIEW = "WAITING_TO_PREVIEW";
  80     private static final String KEY_WAITING_FOR_BINDER = "WAITING_FOR_BINDER";
  81
  82     private static final int INITIAL_HIDE_DELAY = 0; // immediate hide
  83
  84     private ExtendedViewPager mViewPager;
  85     private PreviewImagePagerAdapter mPreviewImagePagerAdapter;
  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         super.onCreate(savedInstanceState);
  97
  98         requestWindowFeature(Window.FEATURE_ACTION_BAR_OVERLAY);
  99         setContentView(R.layout.preview_image_activity);
 100
 101         ActionBar actionBar = getSupportActionBar();
 102         actionBar.setIcon(DisplayUtils.getSeasonalIconId());
 103         actionBar.setDisplayHomeAsUpEnabled(true);
 104         actionBar.hide();
 105
 106         // PIN CODE request
 107         if (getIntent().getExtras() != null && savedInstanceState == null && fromNotification()) {
 108             requestPinCode();
 109         }
 110
 111         // Make sure we're running on Honeycomb or higher to use FullScreen and
 112         // Immersive Mode
 113         if (isHoneycombOrHigher()) {
 114
 115             mFullScreenAnchorView = getWindow().getDecorView();
 116             // to keep our UI controls visibility in line with system bars
 117             // visibility
 118             mFullScreenAnchorView.setOnSystemUiVisibilityChangeListener(new View.OnSystemUiVisibilityChangeListener() {
 119                 @SuppressLint("InlinedApi")
 120                 @Override
 121                 public void onSystemUiVisibilityChange(int flags) {
 122                     boolean visible = (flags & View.SYSTEM_UI_FLAG_HIDE_NAVIGATION) == 0;
 123                     ActionBar actionBar = getSupportActionBar();
 124                     if (visible) {
 125                         actionBar.show();
 126                     } else {
 127                         actionBar.hide();
 128                     }
 129                 }
 130             });
 131
 132         }
 133
 134         if (savedInstanceState != null) {
 135             mRequestWaitingForBinder = savedInstanceState.getBoolean(KEY_WAITING_FOR_BINDER);
 136         } else {
 137             mRequestWaitingForBinder = false;
 138         }
 139
 140     }
 141
 142     private void initViewPager() {
 143         // get parent from path
 144         String parentPath = getFile().getRemotePath().substring(0, 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         mPreviewImagePagerAdapter = new PreviewImagePagerAdapter(getSupportFragmentManager(), parentFolder, getAccount(), getStorageManager());
 151         mViewPager = (ExtendedViewPager) findViewById(R.id.fragmentPager);
 152         int position = mPreviewImagePagerAdapter.getFilePosition(getFile());
 153         position = (position >= 0) ? position : 0;
 154         mViewPager.setAdapter(mPreviewImagePagerAdapter);
 155         mViewPager.setOnPageChangeListener(this);
 156         mViewPager.setCurrentItem(position);
 157         if (position == 0 && !getFile().isDown()) {
 158             // this is necessary because mViewPager.setCurrentItem(0) just after setting the adapter does not result in a call to #onPageSelected(0)
 159             mRequestWaitingForBinder = true;
 160         }
 161     }
 162
 163
 164     protected void onPostCreate(Bundle savedInstanceState)  {
 165         super.onPostCreate(savedInstanceState);
 166
 167         // Trigger the initial hide() shortly after the activity has been
 168         // created, to briefly hint to the user that UI controls
 169         // are available
 170         delayedHide(INITIAL_HIDE_DELAY);
 171
 172     }
 173
 174     Handler mHideSystemUiHandler = new Handler() {
 175         @Override
 176         public void handleMessage(Message msg) {
 177             if (isHoneycombOrHigher()) {
 178                 hideSystemUI(mFullScreenAnchorView);
 179             }
 180             getSupportActionBar().hide();
 181         }
 182     };
 183
 184     private void delayedHide(int delayMillis)   {
 185         mHideSystemUiHandler.removeMessages(0);
 186         mHideSystemUiHandler.sendEmptyMessageDelayed(0, delayMillis);
 187     }
 188
 189
 190     /// handle Window Focus changes
 191     @Override
 192     public void onWindowFocusChanged(boolean hasFocus) {
 193         super.onWindowFocusChanged(hasFocus);
 194
 195         // When the window loses focus (e.g. the action overflow is shown),
 196         // cancel any pending hide action.
 197         if (!hasFocus) {
 198             mHideSystemUiHandler.removeMessages(0);
 199         }
 200     }
 201
 202
 203
 204     @Override
 205     public void onStart() {
 206         super.onStart();
 207     }
 208
 209     @Override
 210     protected void onSaveInstanceState(Bundle outState) {
 211         super.onSaveInstanceState(outState);
 212         outState.putBoolean(KEY_WAITING_FOR_BINDER, mRequestWaitingForBinder);
 213     }
 214
 215     @Override
 216     public void onRemoteOperationFinish(RemoteOperation operation, RemoteOperationResult result) {
 217         super.onRemoteOperationFinish(operation, result);
 218
 219         if (operation instanceof CreateShareOperation) {
 220             onCreateShareOperationFinish((CreateShareOperation) operation, result);
 221
 222         } else if (operation instanceof UnshareLinkOperation) {
 223             onUnshareLinkOperationFinish((UnshareLinkOperation) operation, result);
 224
 225         } else if (operation instanceof RemoveFileOperation) {
 226             finish();
 227         }
 228     }
 229
 230
 231     private void onUnshareLinkOperationFinish(UnshareLinkOperation operation, RemoteOperationResult result) {
 232         if (result.isSuccess()) {
 233             OCFile file = getStorageManager().getFileByPath(getFile().getRemotePath());
 234             if (file != null) {
 235                 setFile(file);
 236             }
 237             invalidateOptionsMenu();
 238         } else if  (result.getCode() == ResultCode.SHARE_NOT_FOUND) {
 239             backToDisplayActivity();
 240         }
 241
 242     }
 243
 244     private void onCreateShareOperationFinish(CreateShareOperation operation, RemoteOperationResult result) {
 245         if (result.isSuccess()) {
 246             OCFile file = getStorageManager().getFileByPath(getFile().getRemotePath());
 247             if (file != null) {
 248                 setFile(file);
 249             }
 250             invalidateOptionsMenu();
 251         }
 252     }
 253
 254     @Override
 255     protected ServiceConnection newTransferenceServiceConnection() {
 256         return new PreviewImageServiceConnection();
 257     }
 258
 259     /** Defines callbacks for service binding, passed to bindService() */
 260     private class PreviewImageServiceConnection implements ServiceConnection {
 261
 262         @Override
 263         public void onServiceConnected(ComponentName component, IBinder service) {
 264
 265             if (component.equals(new ComponentName(PreviewImageActivity.this, FileDownloader.class))) {
 266                 mDownloaderBinder = (FileDownloaderBinder) service;
 267                 if (mRequestWaitingForBinder) {
 268                     mRequestWaitingForBinder = false;
 269                     Log_OC.d(TAG, "Simulating reselection of current page after connection of download binder");
 270                     onPageSelected(mViewPager.getCurrentItem());
 271                 }
 272
 273             } else if (component.equals(new ComponentName(PreviewImageActivity.this, FileUploader.class))) {
 274                 Log_OC.d(TAG, "Upload service connected");
 275                 mUploaderBinder = (FileUploaderBinder) service;
 276             } else {
 277                 return;
 278             }
 279
 280         }
 281
 282         @Override
 283         public void onServiceDisconnected(ComponentName component) {
 284             if (component.equals(new ComponentName(PreviewImageActivity.this, FileDownloader.class))) {
 285                 Log_OC.d(TAG, "Download service suddenly disconnected");
 286                 mDownloaderBinder = null;
 287             } else if (component.equals(new ComponentName(PreviewImageActivity.this, FileUploader.class))) {
 288                 Log_OC.d(TAG, "Upload service suddenly disconnected");
 289                 mUploaderBinder = null;
 290             }
 291         }
 292     };
 293
 294
 295     @Override
 296     public void onStop() {
 297         super.onStop();
 298     }
 299
 300
 301     @Override
 302     public void onDestroy() {
 303         super.onDestroy();
 304     }
 305
 306     @Override
 307     public boolean onOptionsItemSelected(MenuItem item) {
 308         boolean returnValue = false;
 309
 310         switch(item.getItemId()){
 311         case android.R.id.home:
 312             backToDisplayActivity();
 313             returnValue = true;
 314             break;
 315         default:
 316                 returnValue = super.onOptionsItemSelected(item);
 317         }
 318
 319         return returnValue;
 320     }
 321
 322
 323     @Override
 324     protected void onResume() {
 325         super.onResume();
 326         //Log_OC.e(TAG, "ACTIVITY, ONRESUME");
 327         mDownloadFinishReceiver = new DownloadFinishReceiver();
 328
 329         IntentFilter filter = new IntentFilter(FileDownloader.getDownloadFinishMessage());
 330         filter.addAction(FileDownloader.getDownloadAddedMessage());
 331         registerReceiver(mDownloadFinishReceiver, filter);
 332     }
 333
 334     @Override
 335     protected void onPostResume() {
 336         //Log_OC.e(TAG, "ACTIVITY, ONPOSTRESUME");
 337         super.onPostResume();
 338     }
 339
 340     @Override
 341     public void onPause() {
 342         unregisterReceiver(mDownloadFinishReceiver);
 343         mDownloadFinishReceiver = null;
 344         super.onPause();
 345     }
 346
 347
 348     private void backToDisplayActivity() {
 349         finish();
 350     }
 351
 352     @Override
 353     public void showDetails(OCFile file) {
 354         Intent showDetailsIntent = new Intent(this, FileDisplayActivity.class);
 355         showDetailsIntent.setAction(FileDisplayActivity.ACTION_DETAILS);
 356         showDetailsIntent.putExtra(FileActivity.EXTRA_FILE, file);
 357         showDetailsIntent.putExtra(FileActivity.EXTRA_ACCOUNT, AccountUtils.getCurrentOwnCloudAccount(this));
 358         startActivity(showDetailsIntent);
 359         int pos = mPreviewImagePagerAdapter.getFilePosition(file);
 360         file = mPreviewImagePagerAdapter.getFileAt(pos);
 361
 362     }
 363
 364
 365     private void requestForDownload(OCFile file) {
 366         if (mDownloaderBinder == null) {
 367             Log_OC.d(TAG, "requestForDownload called without binder to download service");
 368
 369         } else if (!mDownloaderBinder.isDownloading(getAccount(), file)) {
 370             Intent i = new Intent(this, FileDownloader.class);
 371             i.putExtra(FileDownloader.EXTRA_ACCOUNT, getAccount());
 372             i.putExtra(FileDownloader.EXTRA_FILE, file);
 373             startService(i);
 374         }
 375     }
 376
 377     /**
 378      * This method will be invoked when a new page becomes selected. Animation is not necessarily complete.
 379      *
 380      *  @param  Position        Position index of the new selected page
 381      */
 382     @Override
 383     public void onPageSelected(int position) {
 384         if (mDownloaderBinder == null) {
 385             mRequestWaitingForBinder = true;
 386
 387         } else {
 388             OCFile currentFile = mPreviewImagePagerAdapter.getFileAt(position);
 389             getSupportActionBar().setTitle(currentFile.getFileName());
 390             if (!currentFile.isDown()) {
 391                 if (!mPreviewImagePagerAdapter.pendingErrorAt(position)) {
 392                     requestForDownload(currentFile);
 393                 }
 394             }
 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 programmatically
 414      * 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 nonzero.
 418      *
 419      * @param   positionOffset          Value from [0, 1) indicating the offset from the page at position.
 420      * @param   positionOffsetPixels    Value in pixels indicating the offset from position.
 421      */
 422     @Override
 423     public void onPageScrolled(int position, float positionOffset, int positionOffsetPixels) {
 424     }
 425
 426
 427     /**
 428      * Class waiting for broadcast events from the {@link FielDownloader} service.
 429      *
 430      * Updates the UI when a download is started or finished, provided that it is relevant for the
 431      * folder displayed in the gallery.
 432      */
 433     private class DownloadFinishReceiver extends BroadcastReceiver {
 434         @Override
 435         public void onReceive(Context context, Intent intent) {
 436             String accountName = intent.getStringExtra(FileDownloader.ACCOUNT_NAME);
 437             String downloadedRemotePath = intent.getStringExtra(FileDownloader.EXTRA_REMOTE_PATH);
 438
 439
 440
 441             if (getAccount().name.equals(accountName) &&
 442                     downloadedRemotePath != null) {
 443
 444                 OCFile file = getStorageManager().getFileByPath(downloadedRemotePath);
 445                 int position = mPreviewImagePagerAdapter.getFilePosition(file);
 446                 boolean downloadWasFine = intent.getBooleanExtra(FileDownloader.EXTRA_DOWNLOAD_RESULT, false);
 447                 //boolean isOffscreen =  Math.abs((mViewPager.getCurrentItem() - position)) <= mViewPager.getOffscreenPageLimit();
 448
 449                 if (downloadWasFine){
 450                  // Trigger Mediascan
 451                     MediaScannerConnection.scanFile(
 452                             context,
 453                             new String[]{file.getStoragePath()},
 454                             null,null);
 455                 }
 456
 457                 if (position >= 0 && intent.getAction().equals(FileDownloader.getDownloadFinishMessage())) {
 458                     if (downloadWasFine) {
 459                         mPreviewImagePagerAdapter.updateFile(position, file);
 460
 461                     } else {
 462                         mPreviewImagePagerAdapter.updateWithDownloadError(position);
 463                     }
 464                     mPreviewImagePagerAdapter.notifyDataSetChanged();   // will trigger the creation of new fragments
 465
 466                 } else {
 467                     Log_OC.d(TAG, "Download finished, but the fragment is offscreen");
 468                 }
 469
 470             }
 471             removeStickyBroadcast(intent);
 472         }
 473
 474     }
 475
 476     @SuppressLint("InlinedApi")
 477         public void toggleFullScreen() {
 478
 479         if (isHoneycombOrHigher()) {
 480
 481             boolean visible = (mFullScreenAnchorView.getSystemUiVisibility()
 482                     & View.SYSTEM_UI_FLAG_HIDE_NAVIGATION) == 0;
 483
 484             if (visible) {
 485                 hideSystemUI(mFullScreenAnchorView);
 486                 // actionBar.hide(); // propagated through
 487                 // OnSystemUiVisibilityChangeListener()
 488             } else {
 489                 showSystemUI(mFullScreenAnchorView);
 490                 // actionBar.show(); // propagated through
 491                 // OnSystemUiVisibilityChangeListener()
 492             }
 493
 494         } else {
 495
 496             ActionBar actionBar = getSupportActionBar();
 497             if (!actionBar.isShowing()) {
 498                 actionBar.show();
 499
 500             } else {
 501                 actionBar.hide();
 502
 503             }
 504
 505         }
 506     }
 507
 508     @Override
 509     protected void onAccountSet(boolean stateWasRecovered) {
 510         super.onAccountSet(stateWasRecovered);
 511         if (getAccount() != null) {
 512             OCFile file = getFile();
 513             /// Validate handled file  (first image to preview)
 514             if (file == null) {
 515                 throw new IllegalStateException("Instanced with a NULL OCFile");
 516             }
 517             if (!file.isImage()) {
 518                 throw new IllegalArgumentException("Non-image file passed as argument");
 519             }
 520
 521             // Update file according to DB file, if it is possible
 522             if (file.getFileId() > FileDataStorageManager.ROOT_PARENT_ID)
 523                 file = getStorageManager().getFileById(file.getFileId());
 524
 525             if (file != null) {
 526                 /// Refresh the activity according to the Account and OCFile set
 527                 setFile(file);  // reset after getting it fresh from storageManager
 528                 getSupportActionBar().setTitle(getFile().getFileName());
 529                 //if (!stateWasRecovered) {
 530                     initViewPager();
 531                 //}
 532
 533             } else {
 534                 // handled file not in the current Account
 535                 finish();
 536             }
 537         }
 538     }
 539
 540
 541     /**
 542      * Launch an intent to request the PIN code to the user before letting him use the app
 543      */
 544     private void requestPinCode() {
 545         boolean pinStart = false;
 546         SharedPreferences appPrefs = PreferenceManager.getDefaultSharedPreferences(getApplicationContext());
 547         pinStart = appPrefs.getBoolean("set_pincode", false);
 548         if (pinStart) {
 549             Intent i = new Intent(getApplicationContext(), PinCodeActivity.class);
 550             i.putExtra(PinCodeActivity.EXTRA_ACTIVITY, "PreviewImageActivity");
 551             startActivity(i);
 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 }