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.os.Build;
  27 import android.os.Bundle;
  28 import android.os.Handler;
  29 import android.os.IBinder;
  30 import android.os.Message;
  31 import android.support.v4.view.ViewPager;
  32 import android.view.View;
  33
  34 import com.actionbarsherlock.app.ActionBar;
  35 import com.actionbarsherlock.view.MenuItem;
  36 import com.actionbarsherlock.view.Window;
  37 import com.ortiz.touch.ExtendedViewPager;
  38 import com.owncloud.android.MainApp;
  39 import com.owncloud.android.R;
  40 import com.owncloud.android.authentication.AccountUtils;
  41 import com.owncloud.android.authentication.PinCheck;
  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     private Boolean mUnlocked = false;
  93
  94
  95     @Override
  96     protected void onCreate(Bundle savedInstanceState) {
  97         super.onCreate(savedInstanceState);
  98
  99         requestWindowFeature(Window.FEATURE_ACTION_BAR_OVERLAY);
 100         setContentView(R.layout.preview_image_activity);
 101
 102         ActionBar actionBar = getSupportActionBar();
 103         actionBar.setIcon(DisplayUtils.getSeasonalIconId());
 104         actionBar.setDisplayHomeAsUpEnabled(true);
 105         actionBar.hide();
 106
 107         // PIN CODE request
 108         if (PinCheck.checkIfPinEntry()){
 109             Intent i = new Intent(MainApp.getAppContext(), PinCodeActivity.class);
 110             i.putExtra(PinCodeActivity.EXTRA_ACTIVITY, "PreviewImageActivity");
 111             startActivity(i);
 112         }
 113
 114         // Make sure we're running on Honeycomb or higher to use FullScreen and
 115         // Immersive Mode
 116         if (isHoneycombOrHigher()) {
 117
 118             mFullScreenAnchorView = getWindow().getDecorView();
 119             // to keep our UI controls visibility in line with system bars
 120             // visibility
 121             mFullScreenAnchorView.setOnSystemUiVisibilityChangeListener(new View.OnSystemUiVisibilityChangeListener() {
 122                 @SuppressLint("InlinedApi")
 123                 @Override
 124                 public void onSystemUiVisibilityChange(int flags) {
 125                     boolean visible = (flags & View.SYSTEM_UI_FLAG_HIDE_NAVIGATION) == 0;
 126                     ActionBar actionBar = getSupportActionBar();
 127                     if (visible) {
 128                         actionBar.show();
 129                     } else {
 130                         actionBar.hide();
 131                     }
 132                 }
 133             });
 134
 135         }
 136
 137         if (savedInstanceState != null) {
 138             mRequestWaitingForBinder = savedInstanceState.getBoolean(KEY_WAITING_FOR_BINDER);
 139         } else {
 140             mRequestWaitingForBinder = false;
 141         }
 142
 143     }
 144
 145     private void initViewPager() {
 146         // get parent from path
 147         String parentPath = getFile().getRemotePath().substring(0, getFile().getRemotePath().lastIndexOf(getFile().getFileName()));
 148         OCFile parentFolder = getStorageManager().getFileByPath(parentPath);
 149         if (parentFolder == null) {
 150             // should not be necessary
 151             parentFolder = getStorageManager().getFileByPath(OCFile.ROOT_PATH);
 152         }
 153         mPreviewImagePagerAdapter = new PreviewImagePagerAdapter(getSupportFragmentManager(), parentFolder, getAccount(), getStorageManager());
 154         mViewPager = (ExtendedViewPager) findViewById(R.id.fragmentPager);
 155         int position = mHasSavedPosition ? mSavedPosition : mPreviewImagePagerAdapter.getFilePosition(getFile());
 156         position = (position >= 0) ? position : 0;
 157         mViewPager.setAdapter(mPreviewImagePagerAdapter);
 158         mViewPager.setOnPageChangeListener(this);
 159         mViewPager.setCurrentItem(position);
 160         if (position == 0 && !getFile().isDown()) {
 161             // this is necessary because mViewPager.setCurrentItem(0) just after setting the adapter does not result in a call to #onPageSelected(0)
 162             mRequestWaitingForBinder = true;
 163         }
 164     }
 165
 166
 167     protected void onPostCreate(Bundle savedInstanceState)  {
 168         super.onPostCreate(savedInstanceState);
 169
 170         // Trigger the initial hide() shortly after the activity has been
 171         // created, to briefly hint to the user that UI controls
 172         // are available
 173         delayedHide(INITIAL_HIDE_DELAY);
 174
 175     }
 176
 177     Handler mHideSystemUiHandler = new Handler() {
 178         @Override
 179         public void handleMessage(Message msg) {
 180             if (isHoneycombOrHigher()) {
 181                 hideSystemUI(mFullScreenAnchorView);
 182             }
 183             getSupportActionBar().hide();
 184         }
 185     };
 186
 187     private void delayedHide(int delayMillis)   {
 188         mHideSystemUiHandler.removeMessages(0);
 189         mHideSystemUiHandler.sendEmptyMessageDelayed(0, delayMillis);
 190     }
 191
 192
 193     /// handle Window Focus changes
 194     @Override
 195     public void onWindowFocusChanged(boolean hasFocus) {
 196         super.onWindowFocusChanged(hasFocus);
 197
 198         // When the window loses focus (e.g. the action overflow is shown),
 199         // cancel any pending hide action.
 200         if (!hasFocus) {
 201             mHideSystemUiHandler.removeMessages(0);
 202         }
 203     }
 204
 205
 206
 207     @Override
 208     public void onStart() {
 209         super.onStart();
 210     }
 211
 212     @Override
 213     protected void onSaveInstanceState(Bundle outState) {
 214         super.onSaveInstanceState(outState);
 215         outState.putBoolean(KEY_WAITING_FOR_BINDER, mRequestWaitingForBinder);
 216     }
 217
 218     @Override
 219     public void onRemoteOperationFinish(RemoteOperation operation, RemoteOperationResult result) {
 220         super.onRemoteOperationFinish(operation, result);
 221
 222         if (operation instanceof CreateShareOperation) {
 223             onCreateShareOperationFinish((CreateShareOperation) operation, result);
 224
 225         } else if (operation instanceof UnshareLinkOperation) {
 226             onUnshareLinkOperationFinish((UnshareLinkOperation) operation, result);
 227
 228         } else if (operation instanceof RemoveFileOperation) {
 229             finish();
 230         }
 231     }
 232
 233
 234     private void onUnshareLinkOperationFinish(UnshareLinkOperation operation, RemoteOperationResult result) {
 235         if (result.isSuccess()) {
 236             OCFile file = getStorageManager().getFileByPath(getFile().getRemotePath());
 237             if (file != null) {
 238                 setFile(file);
 239             }
 240             invalidateOptionsMenu();
 241         } else if  (result.getCode() == ResultCode.SHARE_NOT_FOUND) {
 242             backToDisplayActivity();
 243         }
 244
 245     }
 246
 247     private void onCreateShareOperationFinish(CreateShareOperation operation, RemoteOperationResult result) {
 248         if (result.isSuccess()) {
 249             OCFile file = getStorageManager().getFileByPath(getFile().getRemotePath());
 250             if (file != null) {
 251                 setFile(file);
 252             }
 253             invalidateOptionsMenu();
 254         }
 255     }
 256
 257     @Override
 258     protected ServiceConnection newTransferenceServiceConnection() {
 259         return new PreviewImageServiceConnection();
 260     }
 261
 262     /** Defines callbacks for service binding, passed to bindService() */
 263     private class PreviewImageServiceConnection implements ServiceConnection {
 264
 265         @Override
 266         public void onServiceConnected(ComponentName component, IBinder service) {
 267
 268             if (component.equals(new ComponentName(PreviewImageActivity.this, FileDownloader.class))) {
 269                 mDownloaderBinder = (FileDownloaderBinder) service;
 270                 if (mRequestWaitingForBinder) {
 271                     mRequestWaitingForBinder = false;
 272                     Log_OC.d(TAG, "Simulating reselection of current page after connection of download binder");
 273                     onPageSelected(mViewPager.getCurrentItem());
 274                 }
 275
 276             } else if (component.equals(new ComponentName(PreviewImageActivity.this, FileUploader.class))) {
 277                 Log_OC.d(TAG, "Upload service connected");
 278                 mUploaderBinder = (FileUploaderBinder) service;
 279             } else {
 280                 return;
 281             }
 282
 283         }
 284
 285         @Override
 286         public void onServiceDisconnected(ComponentName component) {
 287             if (component.equals(new ComponentName(PreviewImageActivity.this, FileDownloader.class))) {
 288                 Log_OC.d(TAG, "Download service suddenly disconnected");
 289                 mDownloaderBinder = null;
 290             } else if (component.equals(new ComponentName(PreviewImageActivity.this, FileUploader.class))) {
 291                 Log_OC.d(TAG, "Upload service suddenly disconnected");
 292                 mUploaderBinder = null;
 293             }
 294         }
 295     };
 296
 297
 298     @Override
 299     public void onStop() {
 300         super.onStop();
 301     }
 302
 303
 304     @Override
 305     public void onDestroy() {
 306         super.onDestroy();
 307     }
 308
 309     @Override
 310     public boolean onOptionsItemSelected(MenuItem item) {
 311         boolean returnValue = false;
 312
 313         switch(item.getItemId()){
 314         case android.R.id.home:
 315             backToDisplayActivity();
 316             returnValue = true;
 317             break;
 318         default:
 319                 returnValue = super.onOptionsItemSelected(item);
 320         }
 321
 322         return returnValue;
 323     }
 324
 325
 326     @Override
 327     protected void onResume() {
 328         super.onResume();
 329
 330         if (PinCheck.checkIfPinEntry()){
 331             Intent i = new Intent(MainApp.getAppContext(), PinCodeActivity.class);
 332             i.putExtra(PinCodeActivity.EXTRA_ACTIVITY, "PreviewImageActivity");
 333             startActivity(i);
 334         }
 335
 336         //Log_OC.e(TAG, "ACTIVITY, ONRESUME");
 337         mDownloadFinishReceiver = new DownloadFinishReceiver();
 338
 339         IntentFilter filter = new IntentFilter(FileDownloader.getDownloadFinishMessage());
 340         filter.addAction(FileDownloader.getDownloadAddedMessage());
 341         registerReceiver(mDownloadFinishReceiver, filter);
 342     }
 343
 344     @Override
 345     protected void onPostResume() {
 346         //Log_OC.e(TAG, "ACTIVITY, ONPOSTRESUME");
 347         super.onPostResume();
 348     }
 349
 350     @Override
 351     public void onPause() {
 352         if (mDownloadFinishReceiver != null){
 353             unregisterReceiver(mDownloadFinishReceiver);
 354             mDownloadFinishReceiver = null;
 355         }
 356
 357         PinCheck.setUnlockTimestamp();
 358         super.onPause();
 359     }
 360
 361
 362     private void backToDisplayActivity() {
 363         finish();
 364     }
 365
 366     @Override
 367     public void showDetails(OCFile file) {
 368         Intent showDetailsIntent = new Intent(this, FileDisplayActivity.class);
 369         showDetailsIntent.setAction(FileDisplayActivity.ACTION_DETAILS);
 370         showDetailsIntent.putExtra(FileActivity.EXTRA_FILE, file);
 371         showDetailsIntent.putExtra(FileActivity.EXTRA_ACCOUNT, AccountUtils.getCurrentOwnCloudAccount(this));
 372         startActivity(showDetailsIntent);
 373         int pos = mPreviewImagePagerAdapter.getFilePosition(file);
 374         file = mPreviewImagePagerAdapter.getFileAt(pos);
 375
 376     }
 377
 378
 379     private void requestForDownload(OCFile file) {
 380         if (mDownloaderBinder == null) {
 381             Log_OC.d(TAG, "requestForDownload called without binder to download service");
 382
 383         } else if (!mDownloaderBinder.isDownloading(getAccount(), file)) {
 384             Intent i = new Intent(this, FileDownloader.class);
 385             i.putExtra(FileDownloader.EXTRA_ACCOUNT, getAccount());
 386             i.putExtra(FileDownloader.EXTRA_FILE, file);
 387             startService(i);
 388         }
 389     }
 390
 391     /**
 392      * This method will be invoked when a new page becomes selected. Animation is not necessarily complete.
 393      *
 394      *  @param  Position        Position index of the new selected page
 395      */
 396     @Override
 397     public void onPageSelected(int position) {
 398         mSavedPosition = position;
 399         mHasSavedPosition = true;
 400         if (mDownloaderBinder == null) {
 401             mRequestWaitingForBinder = true;
 402
 403         } else {
 404             OCFile currentFile = mPreviewImagePagerAdapter.getFileAt(position);
 405             getSupportActionBar().setTitle(currentFile.getFileName());
 406             if (!currentFile.isDown()) {
 407                 if (!mPreviewImagePagerAdapter.pendingErrorAt(position)) {
 408                     requestForDownload(currentFile);
 409                 }
 410             }
 411
 412             // Call to reset image zoom to initial state
 413             ((PreviewImagePagerAdapter) mViewPager.getAdapter()).resetZoom();
 414         }
 415
 416     }
 417
 418     /**
 419      * Called when the scroll state changes. Useful for discovering when the user begins dragging,
 420      * when the pager is automatically settling to the current page. when it is fully stopped/idle.
 421      *
 422      * @param   State       The new scroll state (SCROLL_STATE_IDLE, _DRAGGING, _SETTLING
 423      */
 424     @Override
 425     public void onPageScrollStateChanged(int state) {
 426     }
 427
 428     /**
 429      * This method will be invoked when the current page is scrolled, either as part of a programmatically
 430      * initiated smooth scroll or a user initiated touch scroll.
 431      *
 432      * @param   position                Position index of the first page currently being displayed.
 433      *                                  Page position+1 will be visible if positionOffset is nonzero.
 434      *
 435      * @param   positionOffset          Value from [0, 1) indicating the offset from the page at position.
 436      * @param   positionOffsetPixels    Value in pixels indicating the offset from position.
 437      */
 438     @Override
 439     public void onPageScrolled(int position, float positionOffset, int positionOffsetPixels) {
 440     }
 441
 442
 443     /**
 444      * Class waiting for broadcast events from the {@link FielDownloader} service.
 445      *
 446      * Updates the UI when a download is started or finished, provided that it is relevant for the
 447      * folder displayed in the gallery.
 448      */
 449     private class DownloadFinishReceiver extends BroadcastReceiver {
 450         @Override
 451         public void onReceive(Context context, Intent intent) {
 452             String accountName = intent.getStringExtra(FileDownloader.ACCOUNT_NAME);
 453             String downloadedRemotePath = intent.getStringExtra(FileDownloader.EXTRA_REMOTE_PATH);
 454             if (getAccount().name.equals(accountName) &&
 455                     downloadedRemotePath != null) {
 456
 457                 OCFile file = getStorageManager().getFileByPath(downloadedRemotePath);
 458                 int position = mPreviewImagePagerAdapter.getFilePosition(file);
 459                 boolean downloadWasFine = intent.getBooleanExtra(FileDownloader.EXTRA_DOWNLOAD_RESULT, false);
 460                 //boolean isOffscreen =  Math.abs((mViewPager.getCurrentItem() - position)) <= mViewPager.getOffscreenPageLimit();
 461
 462                 if (position >= 0 && intent.getAction().equals(FileDownloader.getDownloadFinishMessage())) {
 463                     if (downloadWasFine) {
 464                         mPreviewImagePagerAdapter.updateFile(position, file);
 465
 466                     } else {
 467                         mPreviewImagePagerAdapter.updateWithDownloadError(position);
 468                     }
 469                     mPreviewImagePagerAdapter.notifyDataSetChanged();   // will trigger the creation of new fragments
 470
 471                 } else {
 472                     Log_OC.d(TAG, "Download finished, but the fragment is offscreen");
 473                 }
 474
 475             }
 476             removeStickyBroadcast(intent);
 477         }
 478
 479     }
 480
 481     @SuppressLint("InlinedApi")
 482         public void toggleFullScreen() {
 483
 484         if (isHoneycombOrHigher()) {
 485
 486             boolean visible = (mFullScreenAnchorView.getSystemUiVisibility()
 487                     & View.SYSTEM_UI_FLAG_HIDE_NAVIGATION) == 0;
 488
 489             if (visible) {
 490                 hideSystemUI(mFullScreenAnchorView);
 491                 // actionBar.hide(); // propagated through
 492                 // OnSystemUiVisibilityChangeListener()
 493             } else {
 494                 showSystemUI(mFullScreenAnchorView);
 495                 // actionBar.show(); // propagated through
 496                 // OnSystemUiVisibilityChangeListener()
 497             }
 498
 499         } else {
 500
 501             ActionBar actionBar = getSupportActionBar();
 502             if (!actionBar.isShowing()) {
 503                 actionBar.show();
 504
 505             } else {
 506                 actionBar.hide();
 507
 508             }
 509
 510         }
 511     }
 512
 513     @Override
 514     protected void onAccountSet(boolean stateWasRecovered) {
 515         super.onAccountSet(stateWasRecovered);
 516         if (getAccount() != null) {
 517             OCFile file = getFile();
 518             /// Validate handled file  (first image to preview)
 519             if (file == null) {
 520                 throw new IllegalStateException("Instanced with a NULL OCFile");
 521             }
 522             if (!file.isImage()) {
 523                 throw new IllegalArgumentException("Non-image file passed as argument");
 524             }
 525
 526             // Update file according to DB file, if it is possible
 527             if (file.getFileId() > FileDataStorageManager.ROOT_PARENT_ID)
 528                 file = getStorageManager().getFileById(file.getFileId());
 529
 530             if (file != null) {
 531                 /// Refresh the activity according to the Account and OCFile set
 532                 setFile(file);  // reset after getting it fresh from storageManager
 533                 getSupportActionBar().setTitle(getFile().getFileName());
 534                 //if (!stateWasRecovered) {
 535                     initViewPager();
 536                 //}
 537
 538             } else {
 539                 // handled file not in the current Account
 540                 finish();
 541             }
 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 }