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

   1 /**
   2  *   ownCloud Android client application
   3  *
   4  *   @author David A. Velasco
   5  *   Copyright (C) 2015  ownCloud Inc.
   6  *
   7  *   This program is free software: you can redistribute it and/or modify
   8  *   it under the terms of the GNU General Public License version 2,
   9  *   as published by the Free Software Foundation.
  10  *
  11  *   This program is distributed in the hope that it will be useful,
  12  *   but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  *   GNU General Public License for more details.
  15  *
  16  *   You should have received a copy of the GNU General Public License
  17  *   along with this program.  If not, see <http://www.gnu.org/licenses/>.
  18  *
  19  */
  20 package com.owncloud.android.ui.preview;
  21
  22 import android.annotation.SuppressLint;
  23 import android.content.BroadcastReceiver;
  24 import android.content.ComponentName;
  25 import android.content.Context;
  26 import android.content.Intent;
  27 import android.content.IntentFilter;
  28 import android.content.ServiceConnection;
  29 import android.os.Build;
  30 import android.os.Bundle;
  31 import android.os.Handler;
  32 import android.os.IBinder;
  33 import android.os.Message;
  34 import android.support.v4.view.ViewPager;
  35 import android.view.View;
  36
  37 import com.actionbarsherlock.app.ActionBar;
  38 import com.actionbarsherlock.view.MenuItem;
  39 import com.actionbarsherlock.view.Window;
  40 import com.ortiz.touch.ExtendedViewPager;
  41 import com.owncloud.android.MainApp;
  42 import com.owncloud.android.R;
  43 import com.owncloud.android.authentication.AccountUtils;
  44 import com.owncloud.android.authentication.PinCheck;
  45 import com.owncloud.android.datamodel.FileDataStorageManager;
  46 import com.owncloud.android.datamodel.OCFile;
  47 import com.owncloud.android.files.services.FileDownloader;
  48 import com.owncloud.android.files.services.FileDownloader.FileDownloaderBinder;
  49 import com.owncloud.android.files.services.FileUploader;
  50 import com.owncloud.android.files.services.FileUploader.FileUploaderBinder;
  51 import com.owncloud.android.lib.common.operations.OnRemoteOperationListener;
  52 import com.owncloud.android.lib.common.operations.RemoteOperation;
  53 import com.owncloud.android.lib.common.operations.RemoteOperationResult;
  54 import com.owncloud.android.lib.common.operations.RemoteOperationResult.ResultCode;
  55 import com.owncloud.android.lib.common.utils.Log_OC;
  56 import com.owncloud.android.operations.CreateShareOperation;
  57 import com.owncloud.android.operations.RemoveFileOperation;
  58 import com.owncloud.android.operations.UnshareLinkOperation;
  59 import com.owncloud.android.ui.activity.FileActivity;
  60 import com.owncloud.android.ui.activity.FileDisplayActivity;
  61 import com.owncloud.android.ui.activity.PinCodeActivity;
  62 import com.owncloud.android.ui.fragment.FileFragment;
  63 import com.owncloud.android.utils.DisplayUtils;
  64
  65
  66 /**
  67  *  Holds a swiping galley where image files contained in an ownCloud directory are shown
  68  */
  69 public class PreviewImageActivity extends FileActivity implements
  70  FileFragment.ContainerActivity,
  71 ViewPager.OnPageChangeListener, OnRemoteOperationListener {
  72
  73     public static final int DIALOG_SHORT_WAIT = 0;
  74
  75     public static final String TAG = PreviewImageActivity.class.getSimpleName();
  76
  77     public static final String KEY_WAITING_TO_PREVIEW = "WAITING_TO_PREVIEW";
  78     private static final String KEY_WAITING_FOR_BINDER = "WAITING_FOR_BINDER";
  79
  80     private static final int INITIAL_HIDE_DELAY = 0; // immediate hide
  81
  82     private ExtendedViewPager mViewPager;
  83     private PreviewImagePagerAdapter mPreviewImagePagerAdapter;
  84     private int mSavedPosition = 0;
  85     private boolean mHasSavedPosition = false;
  86
  87     private boolean mRequestWaitingForBinder;
  88
  89     private DownloadFinishReceiver mDownloadFinishReceiver;
  90
  91     private View mFullScreenAnchorView;
  92
  93     private Boolean mUnlocked = false;
  94
  95
  96     @Override
  97     protected void onCreate(Bundle savedInstanceState) {
  98         super.onCreate(savedInstanceState);
  99
 100         requestWindowFeature(Window.FEATURE_ACTION_BAR_OVERLAY);
 101         setContentView(R.layout.preview_image_activity);
 102
 103         ActionBar actionBar = getSupportActionBar();
 104         actionBar.setIcon(DisplayUtils.getSeasonalIconId());
 105         actionBar.setDisplayHomeAsUpEnabled(true);
 106         actionBar.hide();
 107
 108         // PIN CODE request
 109         if (PinCheck.checkIfPinEntry()){
 110             Intent i = new Intent(MainApp.getAppContext(), PinCodeActivity.class);
 111             i.putExtra(PinCodeActivity.EXTRA_ACTIVITY, "PreviewImageActivity");
 112             startActivity(i);
 113         }
 114
 115         // Make sure we're running on Honeycomb or higher to use FullScreen and
 116         // Immersive Mode
 117         if (isHoneycombOrHigher()) {
 118
 119             mFullScreenAnchorView = getWindow().getDecorView();
 120             // to keep our UI controls visibility in line with system bars
 121             // visibility
 122             mFullScreenAnchorView.setOnSystemUiVisibilityChangeListener(new View.OnSystemUiVisibilityChangeListener() {
 123                 @SuppressLint("InlinedApi")
 124                 @Override
 125                 public void onSystemUiVisibilityChange(int flags) {
 126                     boolean visible = (flags & View.SYSTEM_UI_FLAG_HIDE_NAVIGATION) == 0;
 127                     ActionBar actionBar = getSupportActionBar();
 128                     if (visible) {
 129                         actionBar.show();
 130                     } else {
 131                         actionBar.hide();
 132                     }
 133                 }
 134             });
 135
 136         }
 137
 138         if (savedInstanceState != null) {
 139             mRequestWaitingForBinder = savedInstanceState.getBoolean(KEY_WAITING_FOR_BINDER);
 140         } else {
 141             mRequestWaitingForBinder = false;
 142         }
 143
 144     }
 145
 146     private void initViewPager() {
 147         // get parent from path
 148         String parentPath = getFile().getRemotePath().substring(0, getFile().getRemotePath().lastIndexOf(getFile().getFileName()));
 149         OCFile parentFolder = getStorageManager().getFileByPath(parentPath);
 150         if (parentFolder == null) {
 151             // should not be necessary
 152             parentFolder = getStorageManager().getFileByPath(OCFile.ROOT_PATH);
 153         }
 154         mPreviewImagePagerAdapter = new PreviewImagePagerAdapter(getSupportFragmentManager(), parentFolder, getAccount(), getStorageManager());
 155         mViewPager = (ExtendedViewPager) findViewById(R.id.fragmentPager);
 156         int position = mHasSavedPosition ? mSavedPosition : mPreviewImagePagerAdapter.getFilePosition(getFile());
 157         position = (position >= 0) ? position : 0;
 158         mViewPager.setAdapter(mPreviewImagePagerAdapter);
 159         mViewPager.setOnPageChangeListener(this);
 160         mViewPager.setCurrentItem(position);
 161         if (position == 0 && !getFile().isDown()) {
 162             // this is necessary because mViewPager.setCurrentItem(0) just after setting the adapter does not result in a call to #onPageSelected(0)
 163             mRequestWaitingForBinder = true;
 164         }
 165     }
 166
 167
 168     protected void onPostCreate(Bundle savedInstanceState)  {
 169         super.onPostCreate(savedInstanceState);
 170
 171         // Trigger the initial hide() shortly after the activity has been
 172         // created, to briefly hint to the user that UI controls
 173         // are available
 174         delayedHide(INITIAL_HIDE_DELAY);
 175
 176     }
 177
 178     Handler mHideSystemUiHandler = new Handler() {
 179         @Override
 180         public void handleMessage(Message msg) {
 181             if (isHoneycombOrHigher()) {
 182                 hideSystemUI(mFullScreenAnchorView);
 183             }
 184             getSupportActionBar().hide();
 185         }
 186     };
 187
 188     private void delayedHide(int delayMillis)   {
 189         mHideSystemUiHandler.removeMessages(0);
 190         mHideSystemUiHandler.sendEmptyMessageDelayed(0, delayMillis);
 191     }
 192
 193
 194     /// handle Window Focus changes
 195     @Override
 196     public void onWindowFocusChanged(boolean hasFocus) {
 197         super.onWindowFocusChanged(hasFocus);
 198
 199         // When the window loses focus (e.g. the action overflow is shown),
 200         // cancel any pending hide action.
 201         if (!hasFocus) {
 202             mHideSystemUiHandler.removeMessages(0);
 203         }
 204     }
 205
 206
 207
 208     @Override
 209     public void onStart() {
 210         super.onStart();
 211     }
 212
 213     @Override
 214     protected void onSaveInstanceState(Bundle outState) {
 215         super.onSaveInstanceState(outState);
 216         outState.putBoolean(KEY_WAITING_FOR_BINDER, mRequestWaitingForBinder);
 217     }
 218
 219     @Override
 220     public void onRemoteOperationFinish(RemoteOperation operation, RemoteOperationResult result) {
 221         super.onRemoteOperationFinish(operation, result);
 222
 223         if (operation instanceof CreateShareOperation) {
 224             onCreateShareOperationFinish((CreateShareOperation) operation, result);
 225
 226         } else if (operation instanceof UnshareLinkOperation) {
 227             onUnshareLinkOperationFinish((UnshareLinkOperation) operation, result);
 228
 229         } else if (operation instanceof RemoveFileOperation) {
 230             finish();
 231         }
 232     }
 233
 234
 235     private void onUnshareLinkOperationFinish(UnshareLinkOperation operation, RemoteOperationResult result) {
 236         if (result.isSuccess()) {
 237             OCFile file = getStorageManager().getFileByPath(getFile().getRemotePath());
 238             if (file != null) {
 239                 setFile(file);
 240             }
 241             invalidateOptionsMenu();
 242         } else if  (result.getCode() == ResultCode.SHARE_NOT_FOUND) {
 243             backToDisplayActivity();
 244         }
 245
 246     }
 247
 248     private void onCreateShareOperationFinish(CreateShareOperation operation, RemoteOperationResult result) {
 249         if (result.isSuccess()) {
 250             OCFile file = getStorageManager().getFileByPath(getFile().getRemotePath());
 251             if (file != null) {
 252                 setFile(file);
 253             }
 254             invalidateOptionsMenu();
 255         }
 256     }
 257
 258     @Override
 259     protected ServiceConnection newTransferenceServiceConnection() {
 260         return new PreviewImageServiceConnection();
 261     }
 262
 263     /** Defines callbacks for service binding, passed to bindService() */
 264     private class PreviewImageServiceConnection implements ServiceConnection {
 265
 266         @Override
 267         public void onServiceConnected(ComponentName component, IBinder service) {
 268
 269             if (component.equals(new ComponentName(PreviewImageActivity.this, FileDownloader.class))) {
 270                 mDownloaderBinder = (FileDownloaderBinder) service;
 271                 if (mRequestWaitingForBinder) {
 272                     mRequestWaitingForBinder = false;
 273                     Log_OC.d(TAG, "Simulating reselection of current page after connection of download binder");
 274                     onPageSelected(mViewPager.getCurrentItem());
 275                 }
 276
 277             } else if (component.equals(new ComponentName(PreviewImageActivity.this, FileUploader.class))) {
 278                 Log_OC.d(TAG, "Upload service connected");
 279                 mUploaderBinder = (FileUploaderBinder) service;
 280             } else {
 281                 return;
 282             }
 283
 284         }
 285
 286         @Override
 287         public void onServiceDisconnected(ComponentName component) {
 288             if (component.equals(new ComponentName(PreviewImageActivity.this, FileDownloader.class))) {
 289                 Log_OC.d(TAG, "Download service suddenly disconnected");
 290                 mDownloaderBinder = null;
 291             } else if (component.equals(new ComponentName(PreviewImageActivity.this, FileUploader.class))) {
 292                 Log_OC.d(TAG, "Upload service suddenly disconnected");
 293                 mUploaderBinder = null;
 294             }
 295         }
 296     };
 297
 298
 299     @Override
 300     public void onStop() {
 301         super.onStop();
 302     }
 303
 304
 305     @Override
 306     public void onDestroy() {
 307         super.onDestroy();
 308     }
 309
 310     @Override
 311     public boolean onOptionsItemSelected(MenuItem item) {
 312         boolean returnValue = false;
 313
 314         switch(item.getItemId()){
 315         case android.R.id.home:
 316             backToDisplayActivity();
 317             returnValue = true;
 318             break;
 319         default:
 320                 returnValue = super.onOptionsItemSelected(item);
 321         }
 322
 323         return returnValue;
 324     }
 325
 326
 327     @Override
 328     protected void onResume() {
 329         super.onResume();
 330
 331         if (PinCheck.checkIfPinEntry()){
 332             Intent i = new Intent(MainApp.getAppContext(), PinCodeActivity.class);
 333             i.putExtra(PinCodeActivity.EXTRA_ACTIVITY, "PreviewImageActivity");
 334             startActivity(i);
 335         }
 336
 337         //Log_OC.e(TAG, "ACTIVITY, ONRESUME");
 338         mDownloadFinishReceiver = new DownloadFinishReceiver();
 339
 340         IntentFilter filter = new IntentFilter(FileDownloader.getDownloadFinishMessage());
 341         filter.addAction(FileDownloader.getDownloadAddedMessage());
 342         registerReceiver(mDownloadFinishReceiver, filter);
 343     }
 344
 345     @Override
 346     protected void onPostResume() {
 347         //Log_OC.e(TAG, "ACTIVITY, ONPOSTRESUME");
 348         super.onPostResume();
 349     }
 350
 351     @Override
 352     public void onPause() {
 353         if (mDownloadFinishReceiver != null){
 354             unregisterReceiver(mDownloadFinishReceiver);
 355             mDownloadFinishReceiver = null;
 356         }
 357
 358         PinCheck.setUnlockTimestamp();
 359         super.onPause();
 360     }
 361
 362
 363     private void backToDisplayActivity() {
 364         finish();
 365     }
 366
 367     @Override
 368     public void showDetails(OCFile file) {
 369         Intent showDetailsIntent = new Intent(this, FileDisplayActivity.class);
 370         showDetailsIntent.setAction(FileDisplayActivity.ACTION_DETAILS);
 371         showDetailsIntent.putExtra(FileActivity.EXTRA_FILE, file);
 372         showDetailsIntent.putExtra(FileActivity.EXTRA_ACCOUNT, AccountUtils.getCurrentOwnCloudAccount(this));
 373         startActivity(showDetailsIntent);
 374         int pos = mPreviewImagePagerAdapter.getFilePosition(file);
 375         file = mPreviewImagePagerAdapter.getFileAt(pos);
 376
 377     }
 378
 379
 380     private void requestForDownload(OCFile file) {
 381         if (mDownloaderBinder == null) {
 382             Log_OC.d(TAG, "requestForDownload called without binder to download service");
 383
 384         } else if (!mDownloaderBinder.isDownloading(getAccount(), file)) {
 385             Intent i = new Intent(this, FileDownloader.class);
 386             i.putExtra(FileDownloader.EXTRA_ACCOUNT, getAccount());
 387             i.putExtra(FileDownloader.EXTRA_FILE, file);
 388             startService(i);
 389         }
 390     }
 391
 392     /**
 393      * This method will be invoked when a new page becomes selected. Animation is not necessarily complete.
 394      *
 395      *  @param  Position        Position index of the new selected page
 396      */
 397     @Override
 398     public void onPageSelected(int position) {
 399         mSavedPosition = position;
 400         mHasSavedPosition = true;
 401         if (mDownloaderBinder == null) {
 402             mRequestWaitingForBinder = true;
 403
 404         } else {
 405             OCFile currentFile = mPreviewImagePagerAdapter.getFileAt(position);
 406             getSupportActionBar().setTitle(currentFile.getFileName());
 407             if (!currentFile.isDown()) {
 408                 if (!mPreviewImagePagerAdapter.pendingErrorAt(position)) {
 409                     requestForDownload(currentFile);
 410                 }
 411             }
 412
 413             // Call to reset image zoom to initial state
 414             ((PreviewImagePagerAdapter) mViewPager.getAdapter()).resetZoom();
 415         }
 416
 417     }
 418
 419     /**
 420      * Called when the scroll state changes. Useful for discovering when the user begins dragging,
 421      * when the pager is automatically settling to the current page. when it is fully stopped/idle.
 422      *
 423      * @param   State       The new scroll state (SCROLL_STATE_IDLE, _DRAGGING, _SETTLING
 424      */
 425     @Override
 426     public void onPageScrollStateChanged(int state) {
 427     }
 428
 429     /**
 430      * This method will be invoked when the current page is scrolled, either as part of a programmatically
 431      * initiated smooth scroll or a user initiated touch scroll.
 432      *
 433      * @param   position                Position index of the first page currently being displayed.
 434      *                                  Page position+1 will be visible if positionOffset is nonzero.
 435      *
 436      * @param   positionOffset          Value from [0, 1) indicating the offset from the page at position.
 437      * @param   positionOffsetPixels    Value in pixels indicating the offset from position.
 438      */
 439     @Override
 440     public void onPageScrolled(int position, float positionOffset, int positionOffsetPixels) {
 441     }
 442
 443
 444     /**
 445      * Class waiting for broadcast events from the {@link FileDownloader} service.
 446      *
 447      * Updates the UI when a download is started or finished, provided that it is relevant for the
 448      * folder displayed in the gallery.
 449      */
 450     private class DownloadFinishReceiver extends BroadcastReceiver {
 451         @Override
 452         public void onReceive(Context context, Intent intent) {
 453             String accountName = intent.getStringExtra(FileDownloader.ACCOUNT_NAME);
 454             String downloadedRemotePath = intent.getStringExtra(FileDownloader.EXTRA_REMOTE_PATH);
 455             if (getAccount().name.equals(accountName) &&
 456                     downloadedRemotePath != null) {
 457
 458                 OCFile file = getStorageManager().getFileByPath(downloadedRemotePath);
 459                 int position = mPreviewImagePagerAdapter.getFilePosition(file);
 460                 boolean downloadWasFine = intent.getBooleanExtra(FileDownloader.EXTRA_DOWNLOAD_RESULT, false);
 461                 //boolean isOffscreen =  Math.abs((mViewPager.getCurrentItem() - position)) <= mViewPager.getOffscreenPageLimit();
 462
 463                 if (position >= 0 && intent.getAction().equals(FileDownloader.getDownloadFinishMessage())) {
 464                     if (downloadWasFine) {
 465                         mPreviewImagePagerAdapter.updateFile(position, file);
 466
 467                     } else {
 468                         mPreviewImagePagerAdapter.updateWithDownloadError(position);
 469                     }
 470                     mPreviewImagePagerAdapter.notifyDataSetChanged();   // will trigger the creation of new fragments
 471
 472                 } else {
 473                     Log_OC.d(TAG, "Download finished, but the fragment is offscreen");
 474                 }
 475
 476             }
 477             removeStickyBroadcast(intent);
 478         }
 479
 480     }
 481
 482     @SuppressLint("InlinedApi")
 483         public void toggleFullScreen() {
 484
 485         if (isHoneycombOrHigher()) {
 486
 487             boolean visible = (mFullScreenAnchorView.getSystemUiVisibility()
 488                     & View.SYSTEM_UI_FLAG_HIDE_NAVIGATION) == 0;
 489
 490             if (visible) {
 491                 hideSystemUI(mFullScreenAnchorView);
 492                 // actionBar.hide(); // propagated through
 493                 // OnSystemUiVisibilityChangeListener()
 494             } else {
 495                 showSystemUI(mFullScreenAnchorView);
 496                 // actionBar.show(); // propagated through
 497                 // OnSystemUiVisibilityChangeListener()
 498             }
 499
 500         } else {
 501
 502             ActionBar actionBar = getSupportActionBar();
 503             if (!actionBar.isShowing()) {
 504                 actionBar.show();
 505
 506             } else {
 507                 actionBar.hide();
 508
 509             }
 510
 511         }
 512     }
 513
 514     @Override
 515     protected void onAccountSet(boolean stateWasRecovered) {
 516         super.onAccountSet(stateWasRecovered);
 517         if (getAccount() != null) {
 518             OCFile file = getFile();
 519             /// Validate handled file  (first image to preview)
 520             if (file == null) {
 521                 throw new IllegalStateException("Instanced with a NULL OCFile");
 522             }
 523             if (!file.isImage()) {
 524                 throw new IllegalArgumentException("Non-image file passed as argument");
 525             }
 526
 527             // Update file according to DB file, if it is possible
 528             if (file.getFileId() > FileDataStorageManager.ROOT_PARENT_ID)
 529                 file = getStorageManager().getFileById(file.getFileId());
 530
 531             if (file != null) {
 532                 /// Refresh the activity according to the Account and OCFile set
 533                 setFile(file);  // reset after getting it fresh from storageManager
 534                 getSupportActionBar().setTitle(getFile().getFileName());
 535                 //if (!stateWasRecovered) {
 536                     initViewPager();
 537                 //}
 538
 539             } else {
 540                 // handled file not in the current Account
 541                 finish();
 542             }
 543         }
 544     }
 545
 546     @Override
 547     public void onBrowsedDownTo(OCFile folder) {
 548         // TODO Auto-generated method stub
 549
 550     }
 551
 552     @Override
 553     public void onTransferStateChanged(OCFile file, boolean downloading, boolean uploading) {
 554         // TODO Auto-generated method stub
 555
 556     }
 557
 558
 559     @SuppressLint("InlinedApi")
 560         private void hideSystemUI(View anchorView) {
 561         anchorView.setSystemUiVisibility(
 562                 View.SYSTEM_UI_FLAG_HIDE_NAVIGATION         // hides NAVIGATION BAR; Android >= 4.0
 563             |   View.SYSTEM_UI_FLAG_FULLSCREEN              // hides STATUS BAR;     Android >= 4.1
 564             |   View.SYSTEM_UI_FLAG_IMMERSIVE               // stays interactive;    Android >= 4.4
 565             |   View.SYSTEM_UI_FLAG_LAYOUT_STABLE           // draw full window;     Android >= 4.1
 566             |   View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN       // draw full window;     Android >= 4.1
 567             |   View.SYSTEM_UI_FLAG_LAYOUT_HIDE_NAVIGATION  // draw full window;     Android >= 4.1
 568         );
 569     }
 570
 571     @SuppressLint("InlinedApi")
 572     private void showSystemUI(View anchorView) {
 573         anchorView.setSystemUiVisibility(
 574                 View.SYSTEM_UI_FLAG_LAYOUT_STABLE           // draw full window;     Android >= 4.1
 575             |   View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN       // draw full window;     Android >= 4.1
 576             |   View.SYSTEM_UI_FLAG_LAYOUT_HIDE_NAVIGATION  // draw full window;     Android >= 4.1
 577         );
 578     }
 579
 580     /**
 581      * Checks if OS version is Honeycomb one or higher
 582      *
 583      * @return boolean
 584      */
 585     private boolean isHoneycombOrHigher() {
 586         if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.HONEYCOMB) {
 587             return true;
 588         }
 589         return false;
 590     }
 591 }