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.lib.common.utils.Log_OC;
  53 import com.owncloud.android.operations.CreateShareOperation;
  54 import com.owncloud.android.operations.RemoveFileOperation;
  55 import com.owncloud.android.operations.UnshareLinkOperation;
  56 import com.owncloud.android.ui.activity.FileActivity;
  57 import com.owncloud.android.ui.activity.FileDisplayActivity;
  58 import com.owncloud.android.ui.activity.PinCodeActivity;
  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  *  @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     private int mSavedPosition = 0;
  84     private boolean mHasSavedPosition = false;
  85
  86     private boolean mRequestWaitingForBinder;
  87
  88     private DownloadFinishReceiver mDownloadFinishReceiver;
  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             mFullScreenAnchorView = getWindow().getDecorView();
 115             // to keep our UI controls visibility in line with system bars
 116             // visibility
 117             mFullScreenAnchorView.setOnSystemUiVisibilityChangeListener(new View.OnSystemUiVisibilityChangeListener() {
 118                 @SuppressLint("InlinedApi")
 119                 @Override
 120                 public void onSystemUiVisibilityChange(int flags) {
 121                     boolean visible = (flags & View.SYSTEM_UI_FLAG_HIDE_NAVIGATION) == 0;
 122                     ActionBar actionBar = getSupportActionBar();
 123                     if (visible) {
 124                         actionBar.show();
 125                     } else {
 126                         actionBar.hide();
 127                     }
 128                 }
 129             });
 130
 131         }
 132
 133         if (savedInstanceState != null) {
 134             mRequestWaitingForBinder = savedInstanceState.getBoolean(KEY_WAITING_FOR_BINDER);
 135         } else {
 136             mRequestWaitingForBinder = false;
 137         }
 138
 139     }
 140
 141     private void initViewPager() {
 142         // get parent from path
 143         String parentPath = getFile().getRemotePath().substring(0, getFile().getRemotePath().lastIndexOf(getFile().getFileName()));
 144         OCFile parentFolder = getStorageManager().getFileByPath(parentPath);
 145         if (parentFolder == null) {
 146             // should not be necessary
 147             parentFolder = getStorageManager().getFileByPath(OCFile.ROOT_PATH);
 148         }
 149         mPreviewImagePagerAdapter = new PreviewImagePagerAdapter(getSupportFragmentManager(), parentFolder, getAccount(), getStorageManager());
 150         mViewPager = (ExtendedViewPager) findViewById(R.id.fragmentPager);
 151         int position = mHasSavedPosition ? mSavedPosition : mPreviewImagePagerAdapter.getFilePosition(getFile());
 152         position = (position >= 0) ? position : 0;
 153         mViewPager.setAdapter(mPreviewImagePagerAdapter);
 154         mViewPager.setOnPageChangeListener(this);
 155         mViewPager.setCurrentItem(position);
 156         if (position == 0 && !getFile().isDown()) {
 157             // this is necessary because mViewPager.setCurrentItem(0) just after setting the adapter does not result in a call to #onPageSelected(0)
 158             mRequestWaitingForBinder = true;
 159         }
 160     }
 161
 162
 163     protected void onPostCreate(Bundle savedInstanceState)  {
 164         super.onPostCreate(savedInstanceState);
 165
 166         // Trigger the initial hide() shortly after the activity has been
 167         // created, to briefly hint to the user that UI controls
 168         // are available
 169         delayedHide(INITIAL_HIDE_DELAY);
 170
 171     }
 172
 173     Handler mHideSystemUiHandler = new Handler() {
 174         @Override
 175         public void handleMessage(Message msg) {
 176             if (isHoneycombOrHigher()) {
 177                 hideSystemUI(mFullScreenAnchorView);
 178             }
 179             getSupportActionBar().hide();
 180         }
 181     };
 182
 183     private void delayedHide(int delayMillis)   {
 184         mHideSystemUiHandler.removeMessages(0);
 185         mHideSystemUiHandler.sendEmptyMessageDelayed(0, delayMillis);
 186     }
 187
 188
 189     /// handle Window Focus changes
 190     @Override
 191     public void onWindowFocusChanged(boolean hasFocus) {
 192         super.onWindowFocusChanged(hasFocus);
 193
 194         // When the window loses focus (e.g. the action overflow is shown),
 195         // cancel any pending hide action.
 196         if (!hasFocus) {
 197             mHideSystemUiHandler.removeMessages(0);
 198         }
 199     }
 200
 201
 202
 203     @Override
 204     public void onStart() {
 205         super.onStart();
 206     }
 207
 208     @Override
 209     protected void onSaveInstanceState(Bundle outState) {
 210         super.onSaveInstanceState(outState);
 211         outState.putBoolean(KEY_WAITING_FOR_BINDER, mRequestWaitingForBinder);
 212     }
 213
 214     @Override
 215     public void onRemoteOperationFinish(RemoteOperation operation, RemoteOperationResult result) {
 216         super.onRemoteOperationFinish(operation, result);
 217
 218         if (operation instanceof CreateShareOperation) {
 219             onCreateShareOperationFinish((CreateShareOperation) operation, result);
 220
 221         } else if (operation instanceof UnshareLinkOperation) {
 222             onUnshareLinkOperationFinish((UnshareLinkOperation) operation, result);
 223
 224         } else if (operation instanceof RemoveFileOperation) {
 225             finish();
 226         }
 227     }
 228
 229
 230     private void onUnshareLinkOperationFinish(UnshareLinkOperation operation, RemoteOperationResult result) {
 231         if (result.isSuccess()) {
 232             OCFile file = getStorageManager().getFileByPath(getFile().getRemotePath());
 233             if (file != null) {
 234                 setFile(file);
 235             }
 236             invalidateOptionsMenu();
 237         } else if  (result.getCode() == ResultCode.SHARE_NOT_FOUND) {
 238             backToDisplayActivity();
 239         }
 240
 241     }
 242
 243     private void onCreateShareOperationFinish(CreateShareOperation operation, RemoteOperationResult result) {
 244         if (result.isSuccess()) {
 245             OCFile file = getStorageManager().getFileByPath(getFile().getRemotePath());
 246             if (file != null) {
 247                 setFile(file);
 248             }
 249             invalidateOptionsMenu();
 250         }
 251     }
 252
 253     @Override
 254     protected ServiceConnection newTransferenceServiceConnection() {
 255         return new PreviewImageServiceConnection();
 256     }
 257
 258     /** Defines callbacks for service binding, passed to bindService() */
 259     private class PreviewImageServiceConnection implements ServiceConnection {
 260
 261         @Override
 262         public void onServiceConnected(ComponentName component, IBinder service) {
 263
 264             if (component.equals(new ComponentName(PreviewImageActivity.this, FileDownloader.class))) {
 265                 mDownloaderBinder = (FileDownloaderBinder) service;
 266                 if (mRequestWaitingForBinder) {
 267                     mRequestWaitingForBinder = false;
 268                     Log_OC.d(TAG, "Simulating reselection of current page after connection of download binder");
 269                     onPageSelected(mViewPager.getCurrentItem());
 270                 }
 271
 272             } else if (component.equals(new ComponentName(PreviewImageActivity.this, FileUploader.class))) {
 273                 Log_OC.d(TAG, "Upload service connected");
 274                 mUploaderBinder = (FileUploaderBinder) service;
 275             } else {
 276                 return;
 277             }
 278
 279         }
 280
 281         @Override
 282         public void onServiceDisconnected(ComponentName component) {
 283             if (component.equals(new ComponentName(PreviewImageActivity.this, FileDownloader.class))) {
 284                 Log_OC.d(TAG, "Download service suddenly disconnected");
 285                 mDownloaderBinder = null;
 286             } else if (component.equals(new ComponentName(PreviewImageActivity.this, FileUploader.class))) {
 287                 Log_OC.d(TAG, "Upload service suddenly disconnected");
 288                 mUploaderBinder = null;
 289             }
 290         }
 291     };
 292
 293
 294     @Override
 295     public void onStop() {
 296         super.onStop();
 297     }
 298
 299
 300     @Override
 301     public void onDestroy() {
 302         super.onDestroy();
 303     }
 304
 305     @Override
 306     public boolean onOptionsItemSelected(MenuItem item) {
 307         boolean returnValue = false;
 308
 309         switch(item.getItemId()){
 310         case android.R.id.home:
 311             backToDisplayActivity();
 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         //Log_OC.e(TAG, "ACTIVITY, ONRESUME");
 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         //Log_OC.e(TAG, "ACTIVITY, ONPOSTRESUME");
 336         super.onPostResume();
 337     }
 338
 339     @Override
 340     public void onPause() {
 341         unregisterReceiver(mDownloadFinishReceiver);
 342         mDownloadFinishReceiver = null;
 343         super.onPause();
 344     }
 345
 346
 347     private void backToDisplayActivity() {
 348         finish();
 349     }
 350
 351     @Override
 352     public void showDetails(OCFile file) {
 353         Intent showDetailsIntent = new Intent(this, FileDisplayActivity.class);
 354         showDetailsIntent.setAction(FileDisplayActivity.ACTION_DETAILS);
 355         showDetailsIntent.putExtra(FileActivity.EXTRA_FILE, file);
 356         showDetailsIntent.putExtra(FileActivity.EXTRA_ACCOUNT, AccountUtils.getCurrentOwnCloudAccount(this));
 357         startActivity(showDetailsIntent);
 358         int pos = mPreviewImagePagerAdapter.getFilePosition(file);
 359         file = mPreviewImagePagerAdapter.getFileAt(pos);
 360
 361     }
 362
 363
 364     private void requestForDownload(OCFile file) {
 365         if (mDownloaderBinder == null) {
 366             Log_OC.d(TAG, "requestForDownload called without binder to download service");
 367
 368         } else if (!mDownloaderBinder.isDownloading(getAccount(), file)) {
 369             Intent i = new Intent(this, FileDownloader.class);
 370             i.putExtra(FileDownloader.EXTRA_ACCOUNT, getAccount());
 371             i.putExtra(FileDownloader.EXTRA_FILE, file);
 372             startService(i);
 373         }
 374     }
 375
 376     /**
 377      * This method will be invoked when a new page becomes selected. Animation is not necessarily complete.
 378      *
 379      *  @param  Position        Position index of the new selected page
 380      */
 381     @Override
 382     public void onPageSelected(int position) {
 383         mSavedPosition = position;
 384         mHasSavedPosition = true;
 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 FileDownloader} 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()
 472                     & View.SYSTEM_UI_FLAG_HIDE_NAVIGATION) == 0;
 473
 474             if (visible) {
 475                 hideSystemUI(mFullScreenAnchorView);
 476                 // actionBar.hide(); // propagated through
 477                 // OnSystemUiVisibilityChangeListener()
 478             } else {
 479                 showSystemUI(mFullScreenAnchorView);
 480                 // actionBar.show(); // propagated through
 481                 // OnSystemUiVisibilityChangeListener()
 482             }
 483
 484         } else {
 485
 486             ActionBar actionBar = getSupportActionBar();
 487             if (!actionBar.isShowing()) {
 488                 actionBar.show();
 489
 490             } else {
 491                 actionBar.hide();
 492
 493             }
 494
 495         }
 496     }
 497
 498     @Override
 499     protected void onAccountSet(boolean stateWasRecovered) {
 500         super.onAccountSet(stateWasRecovered);
 501         if (getAccount() != null) {
 502             OCFile file = getFile();
 503             /// Validate handled file  (first image to preview)
 504             if (file == null) {
 505                 throw new IllegalStateException("Instanced with a NULL OCFile");
 506             }
 507             if (!file.isImage()) {
 508                 throw new IllegalArgumentException("Non-image file passed as argument");
 509             }
 510
 511             // Update file according to DB file, if it is possible
 512             if (file.getFileId() > FileDataStorageManager.ROOT_PARENT_ID)
 513                 file = getStorageManager().getFileById(file.getFileId());
 514
 515             if (file != null) {
 516                 /// Refresh the activity according to the Account and OCFile set
 517                 setFile(file);  // reset after getting it fresh from storageManager
 518                 getSupportActionBar().setTitle(getFile().getFileName());
 519                 //if (!stateWasRecovered) {
 520                     initViewPager();
 521                 //}
 522
 523             } else {
 524                 // handled file not in the current Account
 525                 finish();
 526             }
 527         }
 528     }
 529
 530
 531     /**
 532      * Launch an intent to request the PIN code to the user before letting him use the app
 533      */
 534     private void requestPinCode() {
 535         boolean pinStart = false;
 536         SharedPreferences appPrefs = PreferenceManager.getDefaultSharedPreferences(getApplicationContext());
 537         pinStart = appPrefs.getBoolean("set_pincode", false);
 538         if (pinStart) {
 539             Intent i = new Intent(getApplicationContext(), PinCodeActivity.class);
 540             i.putExtra(PinCodeActivity.EXTRA_ACTIVITY, "PreviewImageActivity");
 541             startActivity(i);
 542         }
 543     }
 544
 545     @Override
 546     public void onBrowsedDownTo(OCFile folder) {
 547         // TODO Auto-generated method stub
 548
 549     }
 550
 551     @Override
 552     public void onTransferStateChanged(OCFile file, boolean downloading, boolean uploading) {
 553         // TODO Auto-generated method stub
 554
 555     }
 556
 557
 558     @SuppressLint("InlinedApi")
 559         private void hideSystemUI(View anchorView) {
 560         anchorView.setSystemUiVisibility(
 561                 View.SYSTEM_UI_FLAG_HIDE_NAVIGATION         // hides NAVIGATION BAR; Android >= 4.0
 562             |   View.SYSTEM_UI_FLAG_FULLSCREEN              // hides STATUS BAR;     Android >= 4.1
 563             |   View.SYSTEM_UI_FLAG_IMMERSIVE               // stays interactive;    Android >= 4.4
 564             |   View.SYSTEM_UI_FLAG_LAYOUT_STABLE           // draw full window;     Android >= 4.1
 565             |   View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN       // draw full window;     Android >= 4.1
 566             |   View.SYSTEM_UI_FLAG_LAYOUT_HIDE_NAVIGATION  // draw full window;     Android >= 4.1
 567         );
 568     }
 569
 570     @SuppressLint("InlinedApi")
 571     private void showSystemUI(View anchorView) {
 572         anchorView.setSystemUiVisibility(
 573                 View.SYSTEM_UI_FLAG_LAYOUT_STABLE           // draw full window;     Android >= 4.1
 574             |   View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN       // draw full window;     Android >= 4.1
 575             |   View.SYSTEM_UI_FLAG_LAYOUT_HIDE_NAVIGATION  // draw full window;     Android >= 4.1
 576         );
 577     }
 578
 579     /**
 580      * Checks if OS version is Honeycomb one or higher
 581      *
 582      * @return boolean
 583      */
 584     private boolean isHoneycombOrHigher() {
 585         if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.HONEYCOMB) {
 586             return true;
 587         }
 588         return false;
 589     }
 590
 591 }