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.content.SharedPreferences;
  27 import android.os.Build;
  28 import android.os.Bundle;
  29 import android.os.Handler;
  30 import android.os.IBinder;
  31 import android.os.Message;
  32 import android.preference.PreferenceManager;
  33 import android.support.v4.view.ViewPager;
  34 import android.view.View;
  35
  36 import com.actionbarsherlock.app.ActionBar;
  37 import com.actionbarsherlock.view.MenuItem;
  38 import com.actionbarsherlock.view.Window;
  39 import com.ortiz.touch.ExtendedViewPager;
  40 import com.owncloud.android.R;
  41 import com.owncloud.android.authentication.AccountUtils;
  42 import com.owncloud.android.datamodel.FileDataStorageManager;
  43 import com.owncloud.android.datamodel.OCFile;
  44 import com.owncloud.android.files.services.FileDownloader;
  45 import com.owncloud.android.files.services.FileDownloader.FileDownloaderBinder;
  46 import com.owncloud.android.files.services.FileUploader;
  47 import com.owncloud.android.files.services.FileUploader.FileUploaderBinder;
  48 import com.owncloud.android.lib.common.operations.OnRemoteOperationListener;
  49 import com.owncloud.android.lib.common.operations.RemoteOperation;
  50 import com.owncloud.android.lib.common.operations.RemoteOperationResult;
  51 import com.owncloud.android.lib.common.operations.RemoteOperationResult.ResultCode;
  52 import com.owncloud.android.operations.CreateShareOperation;
  53 import com.owncloud.android.operations.RemoveFileOperation;
  54 import com.owncloud.android.operations.UnshareLinkOperation;
  55 import com.owncloud.android.ui.activity.FileActivity;
  56 import com.owncloud.android.ui.activity.FileDisplayActivity;
  57 import com.owncloud.android.ui.activity.PinCodeActivity;
  58 import com.owncloud.android.ui.fragment.FileFragment;
  59 import com.owncloud.android.utils.DisplayUtils;
  60 import com.owncloud.android.utils.Log_OC;
  61
  62
  63 /**
  64  *  Holds a swiping galley where image files contained in an ownCloud directory are shown
  65  *
  66  *  @author David A. Velasco
  67  */
  68 public class PreviewImageActivity extends FileActivity implements
  69  FileFragment.ContainerActivity,
  70 ViewPager.OnPageChangeListener, OnRemoteOperationListener {
  71
  72     public static final int DIALOG_SHORT_WAIT = 0;
  73
  74     public static final String TAG = PreviewImageActivity.class.getSimpleName();
  75
  76     public static final String KEY_WAITING_TO_PREVIEW = "WAITING_TO_PREVIEW";
  77     private static final String KEY_WAITING_FOR_BINDER = "WAITING_FOR_BINDER";
  78
  79     private static final int INITIAL_HIDE_DELAY = 0; // immediate hide
  80
  81     private ExtendedViewPager mViewPager;
  82     private PreviewImagePagerAdapter mPreviewImagePagerAdapter;
  83
  84     private boolean mRequestWaitingForBinder;
  85
  86     private DownloadFinishReceiver mDownloadFinishReceiver;
  87
  88     //private boolean mFullScreen;
  89
  90     private View mFullScreenAnchorView;
  91
  92
  93     @Override
  94     protected void onCreate(Bundle savedInstanceState) {
  95         super.onCreate(savedInstanceState);
  96
  97         requestWindowFeature(Window.FEATURE_ACTION_BAR_OVERLAY);
  98         setContentView(R.layout.preview_image_activity);
  99
 100         ActionBar actionBar = getSupportActionBar();
 101         actionBar.setIcon(DisplayUtils.getSeasonalIconId());
 102         actionBar.setDisplayHomeAsUpEnabled(true);
 103         actionBar.hide();
 104
 105         // PIN CODE request
 106         if (getIntent().getExtras() != null && savedInstanceState == null && fromNotification()) {
 107             requestPinCode();
 108         }
 109
 110         // Make sure we're running on Honeycomb or higher to use FullScreen and
 111         // Immersive Mode
 112         if (isHoneycombOrHigher()) {
 113
 114             // mFullScreen = true;
 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. When the window gains focus,
 197         // hide the system UI.
 198         if (!hasFocus) {
 199             mHideSystemUiHandler.removeMessages(0);
 200         }
 201     }
 202
 203
 204
 205     @Override
 206     public void onStart() {
 207         super.onStart();
 208     }
 209
 210     @Override
 211     protected void onSaveInstanceState(Bundle outState) {
 212         super.onSaveInstanceState(outState);
 213         outState.putBoolean(KEY_WAITING_FOR_BINDER, mRequestWaitingForBinder);
 214     }
 215
 216     @Override
 217     public void onRemoteOperationFinish(RemoteOperation operation, RemoteOperationResult result) {
 218         super.onRemoteOperationFinish(operation, result);
 219
 220         if (operation instanceof CreateShareOperation) {
 221             onCreateShareOperationFinish((CreateShareOperation) operation, result);
 222
 223         } else if (operation instanceof UnshareLinkOperation) {
 224             onUnshareLinkOperationFinish((UnshareLinkOperation) operation, result);
 225
 226         } else if (operation instanceof RemoveFileOperation) {
 227             finish();
 228         }
 229     }
 230
 231
 232     private void onUnshareLinkOperationFinish(UnshareLinkOperation operation, RemoteOperationResult result) {
 233         if (result.isSuccess()) {
 234             OCFile file = getStorageManager().getFileByPath(getFile().getRemotePath());
 235             if (file != null) {
 236                 setFile(file);
 237             }
 238             invalidateOptionsMenu();
 239         } else if  (result.getCode() == ResultCode.SHARE_NOT_FOUND) {
 240             backToDisplayActivity();
 241         }
 242
 243     }
 244
 245     private void onCreateShareOperationFinish(CreateShareOperation operation, RemoteOperationResult result) {
 246         if (result.isSuccess()) {
 247             OCFile file = getStorageManager().getFileByPath(getFile().getRemotePath());
 248             if (file != null) {
 249                 setFile(file);
 250             }
 251             invalidateOptionsMenu();
 252         }
 253     }
 254
 255     @Override
 256     protected ServiceConnection newTransferenceServiceConnection() {
 257         return new PreviewImageServiceConnection();
 258     }
 259
 260     /** Defines callbacks for service binding, passed to bindService() */
 261     private class PreviewImageServiceConnection implements ServiceConnection {
 262
 263         @Override
 264         public void onServiceConnected(ComponentName component, IBinder service) {
 265
 266             if (component.equals(new ComponentName(PreviewImageActivity.this, FileDownloader.class))) {
 267                 mDownloaderBinder = (FileDownloaderBinder) service;
 268                 if (mRequestWaitingForBinder) {
 269                     mRequestWaitingForBinder = false;
 270                     Log_OC.d(TAG, "Simulating reselection of current page after connection of download binder");
 271                     onPageSelected(mViewPager.getCurrentItem());
 272                 }
 273
 274             } else if (component.equals(new ComponentName(PreviewImageActivity.this, 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, FileDownloader.class))) {
 286                 Log_OC.d(TAG, "Download service suddenly disconnected");
 287                 mDownloaderBinder = null;
 288             } else if (component.equals(new ComponentName(PreviewImageActivity.this, FileUploader.class))) {
 289                 Log_OC.d(TAG, "Upload service suddenly disconnected");
 290                 mUploaderBinder = null;
 291             }
 292         }
 293     };
 294
 295
 296     @Override
 297     public void onStop() {
 298         super.onStop();
 299     }
 300
 301
 302     @Override
 303     public void onDestroy() {
 304         super.onDestroy();
 305     }
 306
 307     @Override
 308     public boolean onOptionsItemSelected(MenuItem item) {
 309         boolean returnValue = false;
 310
 311         switch(item.getItemId()){
 312         case android.R.id.home:
 313             backToDisplayActivity();
 314             returnValue = true;
 315             break;
 316         default:
 317                 returnValue = super.onOptionsItemSelected(item);
 318         }
 319
 320         return returnValue;
 321     }
 322
 323
 324     @Override
 325     protected void onResume() {
 326         super.onResume();
 327         //Log.e(TAG, "ACTIVITY, ONRESUME");
 328         mDownloadFinishReceiver = new DownloadFinishReceiver();
 329
 330         IntentFilter filter = new IntentFilter(FileDownloader.getDownloadFinishMessage());
 331         filter.addAction(FileDownloader.getDownloadAddedMessage());
 332         registerReceiver(mDownloadFinishReceiver, filter);
 333     }
 334
 335     @Override
 336     protected void onPostResume() {
 337         //Log.e(TAG, "ACTIVITY, ONPOSTRESUME");
 338         super.onPostResume();
 339     }
 340
 341     @Override
 342     public void onPause() {
 343         unregisterReceiver(mDownloadFinishReceiver);
 344         mDownloadFinishReceiver = null;
 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, AccountUtils.getCurrentOwnCloudAccount(this));
 359         startActivity(showDetailsIntent);
 360         int pos = mPreviewImagePagerAdapter.getFilePosition(file);
 361         file = mPreviewImagePagerAdapter.getFileAt(pos);
 362
 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 complete.
 380      *
 381      *  @param  Position        Position index of the new selected page
 382      */
 383     @Override
 384     public void onPageSelected(int position) {
 385         if (mDownloaderBinder == null) {
 386             mRequestWaitingForBinder = true;
 387
 388         } else {
 389             OCFile currentFile = mPreviewImagePagerAdapter.getFileAt(position);
 390             getSupportActionBar().setTitle(currentFile.getFileName());
 391             if (!currentFile.isDown()) {
 392                 if (!mPreviewImagePagerAdapter.pendingErrorAt(position)) {
 393                     requestForDownload(currentFile);
 394                 }
 395             }
 396
 397             // Call to reset image zoom to initial state
 398             ((PreviewImagePagerAdapter) mViewPager.getAdapter()).resetZoom();
 399         }
 400
 401     }
 402
 403     /**
 404      * Called when the scroll state changes. Useful for discovering when the user begins dragging,
 405      * when the pager is automatically settling to the current page. when it is fully stopped/idle.
 406      *
 407      * @param   State       The new scroll state (SCROLL_STATE_IDLE, _DRAGGING, _SETTLING
 408      */
 409     @Override
 410     public void onPageScrollStateChanged(int state) {
 411     }
 412
 413     /**
 414      * This method will be invoked when the current page is scrolled, either as part of a programmatically
 415      * initiated smooth scroll or a user initiated touch scroll.
 416      *
 417      * @param   position                Position index of the first page currently being displayed.
 418      *                                  Page position+1 will be visible if positionOffset is nonzero.
 419      *
 420      * @param   positionOffset          Value from [0, 1) indicating the offset from the page at position.
 421      * @param   positionOffsetPixels    Value in pixels indicating the offset from position.
 422      */
 423     @Override
 424     public void onPageScrolled(int position, float positionOffset, int positionOffsetPixels) {
 425     }
 426
 427
 428     /**
 429      * Class waiting for broadcast events from the {@link FielDownloader} service.
 430      *
 431      * Updates the UI when a download is started or finished, provided that it is relevant for the
 432      * folder displayed in the gallery.
 433      */
 434     private class DownloadFinishReceiver extends BroadcastReceiver {
 435         @Override
 436         public void onReceive(Context context, Intent intent) {
 437             String accountName = intent.getStringExtra(FileDownloader.ACCOUNT_NAME);
 438             String downloadedRemotePath = intent.getStringExtra(FileDownloader.EXTRA_REMOTE_PATH);
 439             if (getAccount().name.equals(accountName) &&
 440                     downloadedRemotePath != null) {
 441
 442                 OCFile file = getStorageManager().getFileByPath(downloadedRemotePath);
 443                 int position = mPreviewImagePagerAdapter.getFilePosition(file);
 444                 boolean downloadWasFine = intent.getBooleanExtra(FileDownloader.EXTRA_DOWNLOAD_RESULT, false);
 445                 //boolean isOffscreen =  Math.abs((mViewPager.getCurrentItem() - position)) <= mViewPager.getOffscreenPageLimit();
 446
 447                 if (position >= 0 && intent.getAction().equals(FileDownloader.getDownloadFinishMessage())) {
 448                     if (downloadWasFine) {
 449                         mPreviewImagePagerAdapter.updateFile(position, file);
 450
 451                     } else {
 452                         mPreviewImagePagerAdapter.updateWithDownloadError(position);
 453                     }
 454                     mPreviewImagePagerAdapter.notifyDataSetChanged();   // will trigger the creation of new fragments
 455
 456                 } else {
 457                     Log_OC.d(TAG, "Download finished, but the fragment is offscreen");
 458                 }
 459
 460             }
 461             removeStickyBroadcast(intent);
 462         }
 463
 464     }
 465
 466     @SuppressLint("InlinedApi")
 467         public void toggleFullScreen() {
 468
 469         if (isHoneycombOrHigher()) {
 470
 471             boolean visible = (mFullScreenAnchorView.getSystemUiVisibility() & View.SYSTEM_UI_FLAG_HIDE_NAVIGATION) == 0;
 472
 473             if (visible) {
 474                 hideSystemUI(mFullScreenAnchorView);
 475                 // actionBar.hide(); // propagated through
 476                 // OnSystemUiVisibilityChangeListener()
 477             } else {
 478                 showSystemUI(mFullScreenAnchorView);
 479                 // actionBar.show(); // propagated through
 480                 // OnSystemUiVisibilityChangeListener()
 481             }
 482
 483         } else {
 484
 485             ActionBar actionBar = getSupportActionBar();
 486             if (!actionBar.isShowing()) {
 487                 actionBar.show();
 488
 489             } else {
 490                 actionBar.hide();
 491
 492             }
 493
 494         }
 495     }
 496
 497     @Override
 498     protected void onAccountSet(boolean stateWasRecovered) {
 499         super.onAccountSet(stateWasRecovered);
 500         if (getAccount() != null) {
 501             OCFile file = getFile();
 502             /// Validate handled file  (first image to preview)
 503             if (file == null) {
 504                 throw new IllegalStateException("Instanced with a NULL OCFile");
 505             }
 506             if (!file.isImage()) {
 507                 throw new IllegalArgumentException("Non-image file passed as argument");
 508             }
 509
 510             // Update file according to DB file, if it is possible
 511             if (file.getFileId() > FileDataStorageManager.ROOT_PARENT_ID)
 512                 file = getStorageManager().getFileById(file.getFileId());
 513
 514             if (file != null) {
 515                 /// Refresh the activity according to the Account and OCFile set
 516                 setFile(file);  // reset after getting it fresh from storageManager
 517                 getSupportActionBar().setTitle(getFile().getFileName());
 518                 //if (!stateWasRecovered) {
 519                     initViewPager();
 520                 //}
 521
 522             } else {
 523                 // handled file not in the current Account
 524                 finish();
 525             }
 526         }
 527     }
 528
 529
 530     /**
 531      * Launch an intent to request the PIN code to the user before letting him use the app
 532      */
 533     private void requestPinCode() {
 534         boolean pinStart = false;
 535         SharedPreferences appPrefs = PreferenceManager.getDefaultSharedPreferences(getApplicationContext());
 536         pinStart = appPrefs.getBoolean("set_pincode", false);
 537         if (pinStart) {
 538             Intent i = new Intent(getApplicationContext(), PinCodeActivity.class);
 539             i.putExtra(PinCodeActivity.EXTRA_ACTIVITY, "PreviewImageActivity");
 540             startActivity(i);
 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
 590 }