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.Bundle;
  28 import android.os.Handler;
  29 import android.os.IBinder;
  30 import android.os.Message;
  31 import android.preference.PreferenceManager;
  32 import android.support.v4.view.ViewPager;
  33 import android.view.View;
  34
  35 import com.actionbarsherlock.app.ActionBar;
  36 import com.actionbarsherlock.view.MenuItem;
  37 import com.actionbarsherlock.view.Window;
  38 import com.ortiz.touch.ExtendedViewPager;
  39 import com.owncloud.android.R;
  40 import com.owncloud.android.authentication.AccountUtils;
  41 import com.owncloud.android.datamodel.FileDataStorageManager;
  42 import com.owncloud.android.datamodel.OCFile;
  43 import com.owncloud.android.files.services.FileDownloader;
  44 import com.owncloud.android.files.services.FileDownloader.FileDownloaderBinder;
  45 import com.owncloud.android.files.services.FileUploader;
  46 import com.owncloud.android.files.services.FileUploader.FileUploaderBinder;
  47 import com.owncloud.android.lib.common.operations.OnRemoteOperationListener;
  48 import com.owncloud.android.lib.common.operations.RemoteOperation;
  49 import com.owncloud.android.lib.common.operations.RemoteOperationResult;
  50 import com.owncloud.android.lib.common.operations.RemoteOperationResult.ResultCode;
  51 import com.owncloud.android.operations.CreateShareOperation;
  52 import com.owncloud.android.operations.RemoveFileOperation;
  53 import com.owncloud.android.operations.UnshareLinkOperation;
  54 import com.owncloud.android.ui.activity.FileActivity;
  55 import com.owncloud.android.ui.activity.FileDisplayActivity;
  56 import com.owncloud.android.ui.activity.PinCodeActivity;
  57 import com.owncloud.android.ui.fragment.FileFragment;
  58 import com.owncloud.android.utils.DisplayUtils;
  59 import com.owncloud.android.utils.Log_OC;
  60
  61
  62 /**
  63  *  Holds a swiping galley where image files contained in an ownCloud directory are shown
  64  *
  65  *  @author David A. Velasco
  66  */
  67 public class PreviewImageActivity extends FileActivity implements
  68  FileFragment.ContainerActivity,
  69 ViewPager.OnPageChangeListener, OnRemoteOperationListener {
  70
  71     public static final int DIALOG_SHORT_WAIT = 0;
  72
  73     public static final String TAG = PreviewImageActivity.class.getSimpleName();
  74
  75     public static final String KEY_WAITING_TO_PREVIEW = "WAITING_TO_PREVIEW";
  76     private static final String KEY_WAITING_FOR_BINDER = "WAITING_FOR_BINDER";
  77
  78     private static final int INITIAL_HIDE_DELAY = 0; // immediate hide
  79
  80     private ExtendedViewPager mViewPager;
  81     private PreviewImagePagerAdapter mPreviewImagePagerAdapter;
  82
  83     private boolean mRequestWaitingForBinder;
  84
  85     private DownloadFinishReceiver mDownloadFinishReceiver;
  86
  87     //private boolean mFullScreen;
  88
  89     private View mFullScreenAnchorView;
  90
  91
  92     @Override
  93     protected void onCreate(Bundle savedInstanceState) {
  94         super.onCreate(savedInstanceState);
  95
  96         requestWindowFeature(Window.FEATURE_ACTION_BAR_OVERLAY);
  97         setContentView(R.layout.preview_image_activity);
  98
  99         ActionBar actionBar = getSupportActionBar();
 100         actionBar.setIcon(DisplayUtils.getSeasonalIconId());
 101         actionBar.setDisplayHomeAsUpEnabled(true);
 102         actionBar.hide();
 103
 104         // PIN CODE request
 105         if (getIntent().getExtras() != null && savedInstanceState == null && fromNotification()) {
 106             requestPinCode();
 107         }
 108
 109         //mFullScreen = true;
 110         mFullScreenAnchorView = getWindow().getDecorView();
 111         // to keep our UI controls visibility in line with system bars visibility
 112         mFullScreenAnchorView.setOnSystemUiVisibilityChangeListener(
 113             new View.OnSystemUiVisibilityChangeListener() {
 114                 @SuppressLint("InlinedApi")
 115                                 @Override
 116                 public void onSystemUiVisibilityChange(int flags)   {
 117                     boolean visible = (flags &
 118                         View.SYSTEM_UI_FLAG_HIDE_NAVIGATION) == 0;
 119                     ActionBar actionBar = getSupportActionBar();
 120                     if (visible) {
 121                         actionBar.show();
 122                     } else {
 123                         actionBar.hide();
 124                     }
 125                 }
 126             }
 127         );
 128
 129         if (savedInstanceState != null) {
 130             mRequestWaitingForBinder = savedInstanceState.getBoolean(KEY_WAITING_FOR_BINDER);
 131         } else {
 132             mRequestWaitingForBinder = false;
 133         }
 134
 135     }
 136
 137     private void initViewPager() {
 138         // get parent from path
 139         String parentPath = getFile().getRemotePath().substring(0, getFile().getRemotePath().lastIndexOf(getFile().getFileName()));
 140         OCFile parentFolder = getStorageManager().getFileByPath(parentPath);
 141         if (parentFolder == null) {
 142             // should not be necessary
 143             parentFolder = getStorageManager().getFileByPath(OCFile.ROOT_PATH);
 144         }
 145         mPreviewImagePagerAdapter = new PreviewImagePagerAdapter(getSupportFragmentManager(), parentFolder, getAccount(), getStorageManager());
 146         mViewPager = (ExtendedViewPager) findViewById(R.id.fragmentPager);
 147         int position = 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 adapter does not result in a call to #onPageSelected(0)
 154             mRequestWaitingForBinder = true;
 155         }
 156     }
 157
 158
 159     protected void onPostCreate(Bundle savedInstanceState)  {
 160         super.onPostCreate(savedInstanceState);
 161
 162         // Trigger the initial hide() shortly after the activity has been
 163         // created, to briefly hint to the user that UI controls
 164         // are available
 165         delayedHide(INITIAL_HIDE_DELAY);
 166
 167     }
 168
 169     Handler mHideSystemUiHandler = new Handler() {
 170         @Override
 171         public void handleMessage(Message msg) {
 172             hideSystemUI(mFullScreenAnchorView);
 173             getSupportActionBar().hide();
 174         }
 175     };
 176
 177     private void delayedHide(int delayMillis)   {
 178         mHideSystemUiHandler.removeMessages(0);
 179         mHideSystemUiHandler.sendEmptyMessageDelayed(0, delayMillis);
 180     }
 181
 182
 183     /// handle Window Focus changes
 184     @Override
 185     public void onWindowFocusChanged(boolean hasFocus) {
 186         super.onWindowFocusChanged(hasFocus);
 187
 188         // When the window loses focus (e.g. the action overflow is shown),
 189         // cancel any pending hide action. When the window gains focus,
 190         // hide the system UI.
 191         if (hasFocus) {
 192             delayedHide(INITIAL_HIDE_DELAY);
 193         } else {
 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, RemoteOperationResult result) {
 228         if (result.isSuccess()) {
 229             OCFile file = getStorageManager().getFileByPath(getFile().getRemotePath());
 230             if (file != null) {
 231                 setFile(file);
 232             }
 233             invalidateOptionsMenu();
 234         } else if  (result.getCode() == ResultCode.SHARE_NOT_FOUND) {
 235             backToDisplayActivity();
 236         }
 237
 238     }
 239
 240     private void onCreateShareOperationFinish(CreateShareOperation operation, RemoteOperationResult result) {
 241         if (result.isSuccess()) {
 242             OCFile file = getStorageManager().getFileByPath(getFile().getRemotePath());
 243             if (file != null) {
 244                 setFile(file);
 245             }
 246             invalidateOptionsMenu();
 247         }
 248     }
 249
 250     @Override
 251     protected ServiceConnection newTransferenceServiceConnection() {
 252         return new PreviewImageServiceConnection();
 253     }
 254
 255     /** Defines callbacks for service binding, passed to bindService() */
 256     private class PreviewImageServiceConnection implements ServiceConnection {
 257
 258         @Override
 259         public void onServiceConnected(ComponentName component, IBinder service) {
 260
 261             if (component.equals(new ComponentName(PreviewImageActivity.this, FileDownloader.class))) {
 262                 mDownloaderBinder = (FileDownloaderBinder) service;
 263                 if (mRequestWaitingForBinder) {
 264                     mRequestWaitingForBinder = false;
 265                     Log_OC.d(TAG, "Simulating reselection of current page after connection of download binder");
 266                     onPageSelected(mViewPager.getCurrentItem());
 267                 }
 268
 269             } else if (component.equals(new ComponentName(PreviewImageActivity.this, FileUploader.class))) {
 270                 Log_OC.d(TAG, "Upload service connected");
 271                 mUploaderBinder = (FileUploaderBinder) service;
 272             } else {
 273                 return;
 274             }
 275
 276         }
 277
 278         @Override
 279         public void onServiceDisconnected(ComponentName component) {
 280             if (component.equals(new ComponentName(PreviewImageActivity.this, FileDownloader.class))) {
 281                 Log_OC.d(TAG, "Download service suddenly disconnected");
 282                 mDownloaderBinder = null;
 283             } else if (component.equals(new ComponentName(PreviewImageActivity.this, FileUploader.class))) {
 284                 Log_OC.d(TAG, "Upload service suddenly disconnected");
 285                 mUploaderBinder = null;
 286             }
 287         }
 288     };
 289
 290
 291     @Override
 292     public void onStop() {
 293         super.onStop();
 294     }
 295
 296
 297     @Override
 298     public void onDestroy() {
 299         super.onDestroy();
 300     }
 301
 302     @Override
 303     public boolean onOptionsItemSelected(MenuItem item) {
 304         boolean returnValue = false;
 305
 306         switch(item.getItemId()){
 307         case android.R.id.home:
 308             backToDisplayActivity();
 309             returnValue = true;
 310             break;
 311         default:
 312                 returnValue = super.onOptionsItemSelected(item);
 313         }
 314
 315         return returnValue;
 316     }
 317
 318
 319     @Override
 320     protected void onResume() {
 321         super.onResume();
 322         //Log.e(TAG, "ACTIVITY, ONRESUME");
 323         mDownloadFinishReceiver = new DownloadFinishReceiver();
 324
 325         IntentFilter filter = new IntentFilter(FileDownloader.getDownloadFinishMessage());
 326         filter.addAction(FileDownloader.getDownloadAddedMessage());
 327         registerReceiver(mDownloadFinishReceiver, filter);
 328     }
 329
 330     @Override
 331     protected void onPostResume() {
 332         //Log.e(TAG, "ACTIVITY, ONPOSTRESUME");
 333         super.onPostResume();
 334     }
 335
 336     @Override
 337     public void onPause() {
 338         unregisterReceiver(mDownloadFinishReceiver);
 339         mDownloadFinishReceiver = null;
 340         super.onPause();
 341     }
 342
 343
 344     private void backToDisplayActivity() {
 345         finish();
 346     }
 347
 348     @Override
 349     public void showDetails(OCFile file) {
 350         Intent showDetailsIntent = new Intent(this, FileDisplayActivity.class);
 351         showDetailsIntent.setAction(FileDisplayActivity.ACTION_DETAILS);
 352         showDetailsIntent.putExtra(FileActivity.EXTRA_FILE, file);
 353         showDetailsIntent.putExtra(FileActivity.EXTRA_ACCOUNT, AccountUtils.getCurrentOwnCloudAccount(this));
 354         startActivity(showDetailsIntent);
 355         int pos = mPreviewImagePagerAdapter.getFilePosition(file);
 356         file = mPreviewImagePagerAdapter.getFileAt(pos);
 357
 358     }
 359
 360
 361     private void requestForDownload(OCFile file) {
 362         if (mDownloaderBinder == null) {
 363             Log_OC.d(TAG, "requestForDownload called without binder to download service");
 364
 365         } else if (!mDownloaderBinder.isDownloading(getAccount(), file)) {
 366             Intent i = new Intent(this, FileDownloader.class);
 367             i.putExtra(FileDownloader.EXTRA_ACCOUNT, getAccount());
 368             i.putExtra(FileDownloader.EXTRA_FILE, file);
 369             startService(i);
 370         }
 371     }
 372
 373     /**
 374      * This method will be invoked when a new page becomes selected. Animation is not necessarily complete.
 375      *
 376      *  @param  Position        Position index of the new selected page
 377      */
 378     @Override
 379     public void onPageSelected(int position) {
 380         if (mDownloaderBinder == null) {
 381             mRequestWaitingForBinder = true;
 382
 383         } else {
 384             OCFile currentFile = mPreviewImagePagerAdapter.getFileAt(position);
 385             getSupportActionBar().setTitle(currentFile.getFileName());
 386             if (!currentFile.isDown()) {
 387                 if (!mPreviewImagePagerAdapter.pendingErrorAt(position)) {
 388                     requestForDownload(currentFile);
 389                 }
 390             }
 391
 392             // Call to reset image zoom to initial state
 393             ((PreviewImagePagerAdapter) mViewPager.getAdapter()).resetZoom();
 394         }
 395
 396     }
 397
 398     /**
 399      * Called when the scroll state changes. Useful for discovering when the user begins dragging,
 400      * when the pager is automatically settling to the current page. when it is fully stopped/idle.
 401      *
 402      * @param   State       The new scroll state (SCROLL_STATE_IDLE, _DRAGGING, _SETTLING
 403      */
 404     @Override
 405     public void onPageScrollStateChanged(int state) {
 406     }
 407
 408     /**
 409      * This method will be invoked when the current page is scrolled, either as part of a programmatically
 410      * initiated smooth scroll or a user initiated touch scroll.
 411      *
 412      * @param   position                Position index of the first page currently being displayed.
 413      *                                  Page position+1 will be visible if positionOffset is nonzero.
 414      *
 415      * @param   positionOffset          Value from [0, 1) indicating the offset from the page at position.
 416      * @param   positionOffsetPixels    Value in pixels indicating the offset from position.
 417      */
 418     @Override
 419     public void onPageScrolled(int position, float positionOffset, int positionOffsetPixels) {
 420     }
 421
 422
 423     /**
 424      * Class waiting for broadcast events from the {@link FielDownloader} service.
 425      *
 426      * Updates the UI when a download is started or finished, provided that it is relevant for the
 427      * folder displayed in the gallery.
 428      */
 429     private class DownloadFinishReceiver extends BroadcastReceiver {
 430         @Override
 431         public void onReceive(Context context, Intent intent) {
 432             String accountName = intent.getStringExtra(FileDownloader.ACCOUNT_NAME);
 433             String downloadedRemotePath = intent.getStringExtra(FileDownloader.EXTRA_REMOTE_PATH);
 434             if (getAccount().name.equals(accountName) &&
 435                     downloadedRemotePath != null) {
 436
 437                 OCFile file = getStorageManager().getFileByPath(downloadedRemotePath);
 438                 int position = mPreviewImagePagerAdapter.getFilePosition(file);
 439                 boolean downloadWasFine = intent.getBooleanExtra(FileDownloader.EXTRA_DOWNLOAD_RESULT, false);
 440                 //boolean isOffscreen =  Math.abs((mViewPager.getCurrentItem() - position)) <= mViewPager.getOffscreenPageLimit();
 441
 442                 if (position >= 0 && intent.getAction().equals(FileDownloader.getDownloadFinishMessage())) {
 443                     if (downloadWasFine) {
 444                         mPreviewImagePagerAdapter.updateFile(position, file);
 445
 446                     } else {
 447                         mPreviewImagePagerAdapter.updateWithDownloadError(position);
 448                     }
 449                     mPreviewImagePagerAdapter.notifyDataSetChanged();   // will trigger the creation of new fragments
 450
 451                 } else {
 452                     Log_OC.d(TAG, "Download finished, but the fragment is offscreen");
 453                 }
 454
 455             }
 456             removeStickyBroadcast(intent);
 457         }
 458
 459     }
 460
 461     @SuppressLint("InlinedApi")
 462         public void toggleFullScreen() {
 463         //ActionBar actionBar = getSupportActionBar();
 464
 465         boolean visible = (
 466                 mFullScreenAnchorView.getSystemUiVisibility()
 467                 & View.SYSTEM_UI_FLAG_HIDE_NAVIGATION
 468             ) == 0;
 469
 470         if (visible) {
 471             hideSystemUI(mFullScreenAnchorView);
 472             //actionBar.hide(); // propagated through OnSystemUiVisibilityChangeListener()
 473         } else {
 474             showSystemUI(mFullScreenAnchorView);
 475             //actionBar.show(); // propagated through OnSystemUiVisibilityChangeListener()
 476         }
 477         /*
 478         if (mFullScreen) {
 479             actionBar.show();
 480
 481         } else {
 482             actionBar.hide();
 483
 484         }
 485         mFullScreen = !mFullScreen;
 486         */
 487     }
 488
 489     @Override
 490     protected void onAccountSet(boolean stateWasRecovered) {
 491         super.onAccountSet(stateWasRecovered);
 492         if (getAccount() != null) {
 493             OCFile file = getFile();
 494             /// Validate handled file  (first image to preview)
 495             if (file == null) {
 496                 throw new IllegalStateException("Instanced with a NULL OCFile");
 497             }
 498             if (!file.isImage()) {
 499                 throw new IllegalArgumentException("Non-image file passed as argument");
 500             }
 501
 502             // Update file according to DB file, if it is possible
 503             if (file.getFileId() > FileDataStorageManager.ROOT_PARENT_ID)
 504                 file = getStorageManager().getFileById(file.getFileId());
 505
 506             if (file != null) {
 507                 /// Refresh the activity according to the Account and OCFile set
 508                 setFile(file);  // reset after getting it fresh from storageManager
 509                 getSupportActionBar().setTitle(getFile().getFileName());
 510                 //if (!stateWasRecovered) {
 511                     initViewPager();
 512                 //}
 513
 514             } else {
 515                 // handled file not in the current Account
 516                 finish();
 517             }
 518         }
 519     }
 520
 521
 522     /**
 523      * Launch an intent to request the PIN code to the user before letting him use the app
 524      */
 525     private void requestPinCode() {
 526         boolean pinStart = false;
 527         SharedPreferences appPrefs = PreferenceManager.getDefaultSharedPreferences(getApplicationContext());
 528         pinStart = appPrefs.getBoolean("set_pincode", false);
 529         if (pinStart) {
 530             Intent i = new Intent(getApplicationContext(), PinCodeActivity.class);
 531             i.putExtra(PinCodeActivity.EXTRA_ACTIVITY, "PreviewImageActivity");
 532             startActivity(i);
 533         }
 534     }
 535
 536     @Override
 537     public void onBrowsedDownTo(OCFile folder) {
 538         // TODO Auto-generated method stub
 539
 540     }
 541
 542     @Override
 543     public void onTransferStateChanged(OCFile file, boolean downloading, boolean uploading) {
 544         // TODO Auto-generated method stub
 545
 546     }
 547
 548
 549     @SuppressLint("InlinedApi")
 550         private void hideSystemUI(View anchorView) {
 551         anchorView.setSystemUiVisibility(
 552                 View.SYSTEM_UI_FLAG_HIDE_NAVIGATION         // hides NAVIGATION BAR; Android >= 4.0
 553             |   View.SYSTEM_UI_FLAG_FULLSCREEN              // hides STATUS BAR;     Android >= 4.1
 554             |   View.SYSTEM_UI_FLAG_IMMERSIVE               // stays interactive;    Android >= 4.4
 555             |   View.SYSTEM_UI_FLAG_LAYOUT_STABLE           // draw full window;     Android >= 4.1
 556             |   View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN       // draw full window;     Android >= 4.1
 557             |   View.SYSTEM_UI_FLAG_LAYOUT_HIDE_NAVIGATION  // draw full window;     Android >= 4.1
 558         );
 559     }
 560
 561     @SuppressLint("InlinedApi")
 562     private void showSystemUI(View anchorView) {
 563         anchorView.setSystemUiVisibility(
 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
 571
 572 }