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.annotation.TargetApi;
  21 import android.content.BroadcastReceiver;
  22 import android.content.ComponentName;
  23 import android.content.Context;
  24 import android.content.Intent;
  25 import android.content.IntentFilter;
  26 import android.content.ServiceConnection;
  27 import android.content.SharedPreferences;
  28 import android.os.Build;
  29 import android.os.Bundle;
  30 import android.os.Handler;
  31 import android.os.IBinder;
  32 import android.os.Message;
  33 import android.preference.PreferenceManager;
  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  *  @author David A. Velasco
  70  */
  71 public class PreviewImageActivity extends FileActivity implements
  72  FileFragment.ContainerActivity,
  73 ViewPager.OnPageChangeListener, OnRemoteOperationListener {
  74
  75     public static final int DIALOG_SHORT_WAIT = 0;
  76
  77     public static final String TAG = PreviewImageActivity.class.getSimpleName();
  78
  79     public static final String KEY_WAITING_TO_PREVIEW = "WAITING_TO_PREVIEW";
  80     private static final String KEY_WAITING_FOR_BINDER = "WAITING_FOR_BINDER";
  81
  82     private static final int INITIAL_HIDE_DELAY = 0; // immediate hide
  83
  84     private ExtendedViewPager mViewPager;
  85     private PreviewImagePagerAdapter mPreviewImagePagerAdapter;
  86     private int mSavedPosition = 0;
  87     private boolean mHasSavedPosition = false;
  88
  89     private boolean mRequestWaitingForBinder;
  90
  91     private DownloadFinishReceiver mDownloadFinishReceiver;
  92
  93     private View mFullScreenAnchorView;
  94
  95     private Boolean mUnlocked = false;
  96
  97
  98     @Override
  99     protected void onCreate(Bundle savedInstanceState) {
 100         super.onCreate(savedInstanceState);
 101
 102         requestWindowFeature(Window.FEATURE_ACTION_BAR_OVERLAY);
 103         setContentView(R.layout.preview_image_activity);
 104
 105         ActionBar actionBar = getSupportActionBar();
 106         actionBar.setIcon(DisplayUtils.getSeasonalIconId());
 107         actionBar.setDisplayHomeAsUpEnabled(true);
 108         actionBar.hide();
 109
 110         // PIN CODE request
 111         if (PinCheck.checkIfPinEntry()){
 112             Intent i = new Intent(MainApp.getAppContext(), PinCodeActivity.class);
 113             i.putExtra(PinCodeActivity.EXTRA_ACTIVITY, "FileDisplayActivity");
 114             startActivity(i);
 115         }
 116
 117         // Make sure we're running on Honeycomb or higher to use FullScreen and
 118         // Immersive Mode
 119         if (isHoneycombOrHigher()) {
 120
 121             mFullScreenAnchorView = getWindow().getDecorView();
 122             // to keep our UI controls visibility in line with system bars
 123             // visibility
 124             mFullScreenAnchorView.setOnSystemUiVisibilityChangeListener(new View.OnSystemUiVisibilityChangeListener() {
 125                 @SuppressLint("InlinedApi")
 126                 @Override
 127                 public void onSystemUiVisibilityChange(int flags) {
 128                     boolean visible = (flags & View.SYSTEM_UI_FLAG_HIDE_NAVIGATION) == 0;
 129                     ActionBar actionBar = getSupportActionBar();
 130                     if (visible) {
 131                         actionBar.show();
 132                     } else {
 133                         actionBar.hide();
 134                     }
 135                 }
 136             });
 137
 138         }
 139
 140         if (savedInstanceState != null) {
 141             mRequestWaitingForBinder = savedInstanceState.getBoolean(KEY_WAITING_FOR_BINDER);
 142         } else {
 143             mRequestWaitingForBinder = false;
 144         }
 145
 146     }
 147
 148     private void initViewPager() {
 149         // get parent from path
 150         String parentPath = getFile().getRemotePath().substring(0, getFile().getRemotePath().lastIndexOf(getFile().getFileName()));
 151         OCFile parentFolder = getStorageManager().getFileByPath(parentPath);
 152         if (parentFolder == null) {
 153             // should not be necessary
 154             parentFolder = getStorageManager().getFileByPath(OCFile.ROOT_PATH);
 155         }
 156         mPreviewImagePagerAdapter = new PreviewImagePagerAdapter(getSupportFragmentManager(), parentFolder, getAccount(), getStorageManager());
 157         mViewPager = (ExtendedViewPager) findViewById(R.id.fragmentPager);
 158         int position = mHasSavedPosition ? mSavedPosition : mPreviewImagePagerAdapter.getFilePosition(getFile());
 159         position = (position >= 0) ? position : 0;
 160         mViewPager.setAdapter(mPreviewImagePagerAdapter);
 161         mViewPager.setOnPageChangeListener(this);
 162         mViewPager.setCurrentItem(position);
 163         if (position == 0 && !getFile().isDown()) {
 164             // this is necessary because mViewPager.setCurrentItem(0) just after setting the adapter does not result in a call to #onPageSelected(0)
 165             mRequestWaitingForBinder = true;
 166         }
 167     }
 168
 169
 170     protected void onPostCreate(Bundle savedInstanceState)  {
 171         super.onPostCreate(savedInstanceState);
 172
 173         // Trigger the initial hide() shortly after the activity has been
 174         // created, to briefly hint to the user that UI controls
 175         // are available
 176         delayedHide(INITIAL_HIDE_DELAY);
 177
 178     }
 179
 180     Handler mHideSystemUiHandler = new Handler() {
 181         @Override
 182         public void handleMessage(Message msg) {
 183             if (isHoneycombOrHigher()) {
 184                 hideSystemUI(mFullScreenAnchorView);
 185             }
 186             getSupportActionBar().hide();
 187         }
 188     };
 189
 190     private void delayedHide(int delayMillis)   {
 191         mHideSystemUiHandler.removeMessages(0);
 192         mHideSystemUiHandler.sendEmptyMessageDelayed(0, delayMillis);
 193     }
 194
 195
 196     /// handle Window Focus changes
 197     @Override
 198     public void onWindowFocusChanged(boolean hasFocus) {
 199         super.onWindowFocusChanged(hasFocus);
 200
 201         // When the window loses focus (e.g. the action overflow is shown),
 202         // cancel any pending hide action.
 203         if (!hasFocus) {
 204             mHideSystemUiHandler.removeMessages(0);
 205         }
 206     }
 207
 208
 209
 210     @Override
 211     public void onStart() {
 212         super.onStart();
 213     }
 214
 215     @Override
 216     protected void onSaveInstanceState(Bundle outState) {
 217         super.onSaveInstanceState(outState);
 218         outState.putBoolean(KEY_WAITING_FOR_BINDER, mRequestWaitingForBinder);
 219     }
 220
 221     @Override
 222     public void onRemoteOperationFinish(RemoteOperation operation, RemoteOperationResult result) {
 223         super.onRemoteOperationFinish(operation, result);
 224
 225         if (operation instanceof CreateShareOperation) {
 226             onCreateShareOperationFinish((CreateShareOperation) operation, result);
 227
 228         } else if (operation instanceof UnshareLinkOperation) {
 229             onUnshareLinkOperationFinish((UnshareLinkOperation) operation, result);
 230
 231         } else if (operation instanceof RemoveFileOperation) {
 232             finish();
 233         }
 234     }
 235
 236
 237     private void onUnshareLinkOperationFinish(UnshareLinkOperation operation, RemoteOperationResult result) {
 238         if (result.isSuccess()) {
 239             OCFile file = getStorageManager().getFileByPath(getFile().getRemotePath());
 240             if (file != null) {
 241                 setFile(file);
 242             }
 243             invalidateOptionsMenu();
 244         } else if  (result.getCode() == ResultCode.SHARE_NOT_FOUND) {
 245             backToDisplayActivity();
 246         }
 247
 248     }
 249
 250     private void onCreateShareOperationFinish(CreateShareOperation operation, RemoteOperationResult result) {
 251         if (result.isSuccess()) {
 252             OCFile file = getStorageManager().getFileByPath(getFile().getRemotePath());
 253             if (file != null) {
 254                 setFile(file);
 255             }
 256             invalidateOptionsMenu();
 257         }
 258     }
 259
 260     @Override
 261     protected ServiceConnection newTransferenceServiceConnection() {
 262         return new PreviewImageServiceConnection();
 263     }
 264
 265     /** Defines callbacks for service binding, passed to bindService() */
 266     private class PreviewImageServiceConnection implements ServiceConnection {
 267
 268         @Override
 269         public void onServiceConnected(ComponentName component, IBinder service) {
 270
 271             if (component.equals(new ComponentName(PreviewImageActivity.this, FileDownloader.class))) {
 272                 mDownloaderBinder = (FileDownloaderBinder) service;
 273                 if (mRequestWaitingForBinder) {
 274                     mRequestWaitingForBinder = false;
 275                     Log_OC.d(TAG, "Simulating reselection of current page after connection of download binder");
 276                     onPageSelected(mViewPager.getCurrentItem());
 277                 }
 278
 279             } else if (component.equals(new ComponentName(PreviewImageActivity.this, FileUploader.class))) {
 280                 Log_OC.d(TAG, "Upload service connected");
 281                 mUploaderBinder = (FileUploaderBinder) service;
 282             } else {
 283                 return;
 284             }
 285
 286         }
 287
 288         @Override
 289         public void onServiceDisconnected(ComponentName component) {
 290             if (component.equals(new ComponentName(PreviewImageActivity.this, FileDownloader.class))) {
 291                 Log_OC.d(TAG, "Download service suddenly disconnected");
 292                 mDownloaderBinder = null;
 293             } else if (component.equals(new ComponentName(PreviewImageActivity.this, FileUploader.class))) {
 294                 Log_OC.d(TAG, "Upload service suddenly disconnected");
 295                 mUploaderBinder = null;
 296             }
 297         }
 298     };
 299
 300
 301     @Override
 302     public void onStop() {
 303         super.onStop();
 304     }
 305
 306
 307     @Override
 308     public void onDestroy() {
 309         super.onDestroy();
 310     }
 311
 312     @Override
 313     public boolean onOptionsItemSelected(MenuItem item) {
 314         boolean returnValue = false;
 315
 316         switch(item.getItemId()){
 317         case android.R.id.home:
 318             backToDisplayActivity();
 319             returnValue = true;
 320             break;
 321         default:
 322                 returnValue = super.onOptionsItemSelected(item);
 323         }
 324
 325         return returnValue;
 326     }
 327
 328
 329     @Override
 330     protected void onResume() {
 331         super.onResume();
 332
 333         if (PinCheck.checkIfPinEntry()){
 334             Intent i = new Intent(MainApp.getAppContext(), PinCodeActivity.class);
 335             i.putExtra(PinCodeActivity.EXTRA_ACTIVITY, "FileDisplayActivity");
 336             startActivity(i);
 337         }
 338     }
 339
 340     private void resume(){
 341         //Log_OC.e(TAG, "ACTIVITY, ONRESUME");
 342         mDownloadFinishReceiver = new DownloadFinishReceiver();
 343
 344         IntentFilter filter = new IntentFilter(FileDownloader.getDownloadFinishMessage());
 345         filter.addAction(FileDownloader.getDownloadAddedMessage());
 346         registerReceiver(mDownloadFinishReceiver, filter);
 347     }
 348
 349     @Override
 350     protected void onPostResume() {
 351         //Log_OC.e(TAG, "ACTIVITY, ONPOSTRESUME");
 352         super.onPostResume();
 353     }
 354
 355     @Override
 356     public void onPause() {
 357         if (mDownloadFinishReceiver != null){
 358             unregisterReceiver(mDownloadFinishReceiver);
 359             mDownloadFinishReceiver = null;
 360         }
 361
 362         PinCheck.setUnlockTimestamp();
 363         super.onPause();
 364     }
 365
 366
 367     private void backToDisplayActivity() {
 368         finish();
 369     }
 370
 371     @Override
 372     public void showDetails(OCFile file) {
 373         Intent showDetailsIntent = new Intent(this, FileDisplayActivity.class);
 374         showDetailsIntent.setAction(FileDisplayActivity.ACTION_DETAILS);
 375         showDetailsIntent.putExtra(FileActivity.EXTRA_FILE, file);
 376         showDetailsIntent.putExtra(FileActivity.EXTRA_ACCOUNT, AccountUtils.getCurrentOwnCloudAccount(this));
 377         startActivity(showDetailsIntent);
 378         int pos = mPreviewImagePagerAdapter.getFilePosition(file);
 379         file = mPreviewImagePagerAdapter.getFileAt(pos);
 380
 381     }
 382
 383
 384     private void requestForDownload(OCFile file) {
 385         if (mDownloaderBinder == null) {
 386             Log_OC.d(TAG, "requestForDownload called without binder to download service");
 387
 388         } else if (!mDownloaderBinder.isDownloading(getAccount(), file)) {
 389             Intent i = new Intent(this, FileDownloader.class);
 390             i.putExtra(FileDownloader.EXTRA_ACCOUNT, getAccount());
 391             i.putExtra(FileDownloader.EXTRA_FILE, file);
 392             startService(i);
 393         }
 394     }
 395
 396     /**
 397      * This method will be invoked when a new page becomes selected. Animation is not necessarily complete.
 398      *
 399      *  @param  Position        Position index of the new selected page
 400      */
 401     @Override
 402     public void onPageSelected(int position) {
 403         mSavedPosition = position;
 404         mHasSavedPosition = true;
 405         if (mDownloaderBinder == null) {
 406             mRequestWaitingForBinder = true;
 407
 408         } else {
 409             OCFile currentFile = mPreviewImagePagerAdapter.getFileAt(position);
 410             getSupportActionBar().setTitle(currentFile.getFileName());
 411             if (!currentFile.isDown()) {
 412                 if (!mPreviewImagePagerAdapter.pendingErrorAt(position)) {
 413                     requestForDownload(currentFile);
 414                 }
 415             }
 416
 417             // Call to reset image zoom to initial state
 418             ((PreviewImagePagerAdapter) mViewPager.getAdapter()).resetZoom();
 419         }
 420
 421     }
 422
 423     /**
 424      * Called when the scroll state changes. Useful for discovering when the user begins dragging,
 425      * when the pager is automatically settling to the current page. when it is fully stopped/idle.
 426      *
 427      * @param   State       The new scroll state (SCROLL_STATE_IDLE, _DRAGGING, _SETTLING
 428      */
 429     @Override
 430     public void onPageScrollStateChanged(int state) {
 431     }
 432
 433     /**
 434      * This method will be invoked when the current page is scrolled, either as part of a programmatically
 435      * initiated smooth scroll or a user initiated touch scroll.
 436      *
 437      * @param   position                Position index of the first page currently being displayed.
 438      *                                  Page position+1 will be visible if positionOffset is nonzero.
 439      *
 440      * @param   positionOffset          Value from [0, 1) indicating the offset from the page at position.
 441      * @param   positionOffsetPixels    Value in pixels indicating the offset from position.
 442      */
 443     @Override
 444     public void onPageScrolled(int position, float positionOffset, int positionOffsetPixels) {
 445     }
 446
 447
 448     /**
 449      * Class waiting for broadcast events from the {@link FielDownloader} service.
 450      *
 451      * Updates the UI when a download is started or finished, provided that it is relevant for the
 452      * folder displayed in the gallery.
 453      */
 454     private class DownloadFinishReceiver extends BroadcastReceiver {
 455         @Override
 456         public void onReceive(Context context, Intent intent) {
 457             String accountName = intent.getStringExtra(FileDownloader.ACCOUNT_NAME);
 458             String downloadedRemotePath = intent.getStringExtra(FileDownloader.EXTRA_REMOTE_PATH);
 459             if (getAccount().name.equals(accountName) &&
 460                     downloadedRemotePath != null) {
 461
 462                 OCFile file = getStorageManager().getFileByPath(downloadedRemotePath);
 463                 int position = mPreviewImagePagerAdapter.getFilePosition(file);
 464                 boolean downloadWasFine = intent.getBooleanExtra(FileDownloader.EXTRA_DOWNLOAD_RESULT, false);
 465                 //boolean isOffscreen =  Math.abs((mViewPager.getCurrentItem() - position)) <= mViewPager.getOffscreenPageLimit();
 466
 467                 if (position >= 0 && intent.getAction().equals(FileDownloader.getDownloadFinishMessage())) {
 468                     if (downloadWasFine) {
 469                         mPreviewImagePagerAdapter.updateFile(position, file);
 470
 471                     } else {
 472                         mPreviewImagePagerAdapter.updateWithDownloadError(position);
 473                     }
 474                     mPreviewImagePagerAdapter.notifyDataSetChanged();   // will trigger the creation of new fragments
 475
 476                 } else {
 477                     Log_OC.d(TAG, "Download finished, but the fragment is offscreen");
 478                 }
 479
 480             }
 481             removeStickyBroadcast(intent);
 482         }
 483
 484     }
 485
 486     @SuppressLint("InlinedApi")
 487         public void toggleFullScreen() {
 488
 489         if (isHoneycombOrHigher()) {
 490
 491             boolean visible = (mFullScreenAnchorView.getSystemUiVisibility()
 492                     & View.SYSTEM_UI_FLAG_HIDE_NAVIGATION) == 0;
 493
 494             if (visible) {
 495                 hideSystemUI(mFullScreenAnchorView);
 496                 // actionBar.hide(); // propagated through
 497                 // OnSystemUiVisibilityChangeListener()
 498             } else {
 499                 showSystemUI(mFullScreenAnchorView);
 500                 // actionBar.show(); // propagated through
 501                 // OnSystemUiVisibilityChangeListener()
 502             }
 503
 504         } else {
 505
 506             ActionBar actionBar = getSupportActionBar();
 507             if (!actionBar.isShowing()) {
 508                 actionBar.show();
 509
 510             } else {
 511                 actionBar.hide();
 512
 513             }
 514
 515         }
 516     }
 517
 518     @Override
 519     protected void onAccountSet(boolean stateWasRecovered) {
 520         super.onAccountSet(stateWasRecovered);
 521         if (getAccount() != null) {
 522             OCFile file = getFile();
 523             /// Validate handled file  (first image to preview)
 524             if (file == null) {
 525                 throw new IllegalStateException("Instanced with a NULL OCFile");
 526             }
 527             if (!file.isImage()) {
 528                 throw new IllegalArgumentException("Non-image file passed as argument");
 529             }
 530
 531             // Update file according to DB file, if it is possible
 532             if (file.getFileId() > FileDataStorageManager.ROOT_PARENT_ID)
 533                 file = getStorageManager().getFileById(file.getFileId());
 534
 535             if (file != null) {
 536                 /// Refresh the activity according to the Account and OCFile set
 537                 setFile(file);  // reset after getting it fresh from storageManager
 538                 getSupportActionBar().setTitle(getFile().getFileName());
 539                 //if (!stateWasRecovered) {
 540                     initViewPager();
 541                 //}
 542
 543             } else {
 544                 // handled file not in the current Account
 545                 finish();
 546             }
 547         }
 548     }
 549
 550     @Override
 551     public void onBrowsedDownTo(OCFile folder) {
 552         // TODO Auto-generated method stub
 553
 554     }
 555
 556     @Override
 557     public void onTransferStateChanged(OCFile file, boolean downloading, boolean uploading) {
 558         // TODO Auto-generated method stub
 559
 560     }
 561
 562
 563     @SuppressLint("InlinedApi")
 564         private void hideSystemUI(View anchorView) {
 565         anchorView.setSystemUiVisibility(
 566                 View.SYSTEM_UI_FLAG_HIDE_NAVIGATION         // hides NAVIGATION BAR; Android >= 4.0
 567             |   View.SYSTEM_UI_FLAG_FULLSCREEN              // hides STATUS BAR;     Android >= 4.1
 568             |   View.SYSTEM_UI_FLAG_IMMERSIVE               // stays interactive;    Android >= 4.4
 569             |   View.SYSTEM_UI_FLAG_LAYOUT_STABLE           // draw full window;     Android >= 4.1
 570             |   View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN       // draw full window;     Android >= 4.1
 571             |   View.SYSTEM_UI_FLAG_LAYOUT_HIDE_NAVIGATION  // draw full window;     Android >= 4.1
 572         );
 573     }
 574
 575     @SuppressLint("InlinedApi")
 576     private void showSystemUI(View anchorView) {
 577         anchorView.setSystemUiVisibility(
 578                 View.SYSTEM_UI_FLAG_LAYOUT_STABLE           // draw full window;     Android >= 4.1
 579             |   View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN       // draw full window;     Android >= 4.1
 580             |   View.SYSTEM_UI_FLAG_LAYOUT_HIDE_NAVIGATION  // draw full window;     Android >= 4.1
 581         );
 582     }
 583
 584     /**
 585      * Checks if OS version is Honeycomb one or higher
 586      *
 587      * @return boolean
 588      */
 589     private boolean isHoneycombOrHigher() {
 590         if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.HONEYCOMB) {
 591             return true;
 592         }
 593         return false;
 594     }
 595
 596 }