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

   1 /* ownCloud Android client application
   2  *   Copyright (C) 2012-2013  ownCloud Inc.
   3  *
   4  *   This program is free software: you can redistribute it and/or modify
   5  *   it under the terms of the GNU General Public License version 2,
   6  *   as published by the Free Software Foundation.
   7  *
   8  *   This program is distributed in the hope that it will be useful,
   9  *   but WITHOUT ANY WARRANTY; without even the implied warranty of
  10  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  11  *   GNU General Public License for more details.
  12  *
  13  *   You should have received a copy of the GNU General Public License
  14  *   along with this program.  If not, see <http://www.gnu.org/licenses/>.
  15  *
  16  */
  17 package com.owncloud.android.ui.preview;
  18
  19 import android.annotation.SuppressLint;
  20 import android.content.BroadcastReceiver;
  21 import android.content.ComponentName;
  22 import android.content.Context;
  23 import android.content.Intent;
  24 import android.content.IntentFilter;
  25 import android.content.ServiceConnection;
  26 import android.content.SharedPreferences;
  27 import android.os.Build;
  28 import android.os.Bundle;
  29 import android.os.Handler;
  30 import android.os.IBinder;
  31 import android.os.Message;
  32 import android.preference.PreferenceManager;
  33 import android.support.v4.view.ViewPager;
  34 import android.view.View;
  35
  36 import com.actionbarsherlock.app.ActionBar;
  37 import com.actionbarsherlock.view.MenuItem;
  38 import com.actionbarsherlock.view.Window;
  39 import com.ortiz.touch.ExtendedViewPager;
  40 import com.owncloud.android.R;
  41 import com.owncloud.android.authentication.AccountUtils;
  42 import com.owncloud.android.datamodel.FileDataStorageManager;
  43 import com.owncloud.android.datamodel.OCFile;
  44 import com.owncloud.android.files.services.FileDownloader;
  45 import com.owncloud.android.files.services.FileDownloader.FileDownloaderBinder;
  46 import com.owncloud.android.files.services.FileUploader;
  47 import com.owncloud.android.files.services.FileUploader.FileUploaderBinder;
  48 import com.owncloud.android.lib.common.operations.OnRemoteOperationListener;
  49 import com.owncloud.android.lib.common.operations.RemoteOperation;
  50 import com.owncloud.android.lib.common.operations.RemoteOperationResult;
  51 import com.owncloud.android.lib.common.operations.RemoteOperationResult.ResultCode;
  52 import com.owncloud.android.lib.common.utils.Log_OC;
  53 import com.owncloud.android.operations.CreateShareOperation;
  54 import com.owncloud.android.operations.RemoveFileOperation;
  55 import com.owncloud.android.operations.UnshareLinkOperation;
  56 import com.owncloud.android.ui.activity.FileActivity;
  57 import com.owncloud.android.ui.activity.FileDisplayActivity;
  58 import com.owncloud.android.ui.activity.PinCodeActivity;
  59 import com.owncloud.android.ui.fragment.FileFragment;
  60 import com.owncloud.android.utils.DisplayUtils;
  61
  62
  63 /**
  64  *  Holds a swiping galley where image files contained in an ownCloud directory are shown
  65  *
  66  *  @author David A. Velasco
  67  */
  68 public class PreviewImageActivity extends FileActivity implements
  69  FileFragment.ContainerActivity,
  70 ViewPager.OnPageChangeListener, OnRemoteOperationListener {
  71
  72     public static final int DIALOG_SHORT_WAIT = 0;
  73
  74     public static final String TAG = PreviewImageActivity.class.getSimpleName();
  75
  76     public static final String KEY_WAITING_TO_PREVIEW = "WAITING_TO_PREVIEW";
  77     private static final String KEY_WAITING_FOR_BINDER = "WAITING_FOR_BINDER";
  78
  79     private static final int INITIAL_HIDE_DELAY = 0; // immediate hide
  80
  81     private ExtendedViewPager mViewPager;
  82     private PreviewImagePagerAdapter mPreviewImagePagerAdapter;
  83
  84     private boolean mRequestWaitingForBinder;
  85
  86     private DownloadFinishReceiver mDownloadFinishReceiver;
  87
  88     private View mFullScreenAnchorView;
  89
  90
  91     @Override
  92     protected void onCreate(Bundle savedInstanceState) {
  93         super.onCreate(savedInstanceState);
  94
  95         requestWindowFeature(Window.FEATURE_ACTION_BAR_OVERLAY);
  96         setContentView(R.layout.preview_image_activity);
  97
  98         ActionBar actionBar = getSupportActionBar();
  99         actionBar.setIcon(DisplayUtils.getSeasonalIconId());
 100         actionBar.setDisplayHomeAsUpEnabled(true);
 101         actionBar.hide();
 102
 103         // PIN CODE request
 104         if (getIntent().getExtras() != null && savedInstanceState == null && fromNotification()) {
 105             requestPinCode();
 106         }
 107
 108         // Make sure we're running on Honeycomb or higher to use FullScreen and
 109         // Immersive Mode
 110         if (isHoneycombOrHigher()) {
 111
 112             mFullScreenAnchorView = getWindow().getDecorView();
 113             // to keep our UI controls visibility in line with system bars
 114             // visibility
 115             mFullScreenAnchorView.setOnSystemUiVisibilityChangeListener(new View.OnSystemUiVisibilityChangeListener() {
 116                 @SuppressLint("InlinedApi")
 117                 @Override
 118                 public void onSystemUiVisibilityChange(int flags) {
 119                     boolean visible = (flags & View.SYSTEM_UI_FLAG_HIDE_NAVIGATION) == 0;
 120                     ActionBar actionBar = getSupportActionBar();
 121                     if (visible) {
 122                         actionBar.show();
 123                     } else {
 124                         actionBar.hide();
 125                     }
 126                 }
 127             });
 128
 129         }
 130
 131         if (savedInstanceState != null) {
 132             mRequestWaitingForBinder = savedInstanceState.getBoolean(KEY_WAITING_FOR_BINDER);
 133         } else {
 134             mRequestWaitingForBinder = false;
 135         }
 136
 137     }
 138
 139     private void initViewPager() {
 140         // get parent from path
 141         String parentPath = getFile().getRemotePath().substring(0, getFile().getRemotePath().lastIndexOf(getFile().getFileName()));
 142         OCFile parentFolder = getStorageManager().getFileByPath(parentPath);
 143         if (parentFolder == null) {
 144             // should not be necessary
 145             parentFolder = getStorageManager().getFileByPath(OCFile.ROOT_PATH);
 146         }
 147         mPreviewImagePagerAdapter = new PreviewImagePagerAdapter(getSupportFragmentManager(), parentFolder, getAccount(), getStorageManager());
 148         mViewPager = (ExtendedViewPager) findViewById(R.id.fragmentPager);
 149         int position = mPreviewImagePagerAdapter.getFilePosition(getFile());
 150         position = (position >= 0) ? position : 0;
 151         mViewPager.setAdapter(mPreviewImagePagerAdapter);
 152         mViewPager.setOnPageChangeListener(this);
 153         mViewPager.setCurrentItem(position);
 154         if (position == 0 && !getFile().isDown()) {
 155             // this is necessary because mViewPager.setCurrentItem(0) just after setting the adapter does not result in a call to #onPageSelected(0)
 156             mRequestWaitingForBinder = true;
 157         }
 158     }
 159
 160
 161     protected void onPostCreate(Bundle savedInstanceState)  {
 162         super.onPostCreate(savedInstanceState);
 163
 164         // Trigger the initial hide() shortly after the activity has been
 165         // created, to briefly hint to the user that UI controls
 166         // are available
 167         delayedHide(INITIAL_HIDE_DELAY);
 168
 169     }
 170
 171     Handler mHideSystemUiHandler = new Handler() {
 172         @Override
 173         public void handleMessage(Message msg) {
 174             if (isHoneycombOrHigher()) {
 175                 hideSystemUI(mFullScreenAnchorView);
 176             }
 177             getSupportActionBar().hide();
 178         }
 179     };
 180
 181     private void delayedHide(int delayMillis)   {
 182         mHideSystemUiHandler.removeMessages(0);
 183         mHideSystemUiHandler.sendEmptyMessageDelayed(0, delayMillis);
 184     }
 185
 186
 187     /// handle Window Focus changes
 188     @Override
 189     public void onWindowFocusChanged(boolean hasFocus) {
 190         super.onWindowFocusChanged(hasFocus);
 191
 192         // When the window loses focus (e.g. the action overflow is shown),
 193         // cancel any pending hide action.
 194         if (!hasFocus) {
 195             mHideSystemUiHandler.removeMessages(0);
 196         }
 197     }
 198
 199
 200
 201     @Override
 202     public void onStart() {
 203         super.onStart();
 204     }
 205
 206     @Override
 207     protected void onSaveInstanceState(Bundle outState) {
 208         super.onSaveInstanceState(outState);
 209         outState.putBoolean(KEY_WAITING_FOR_BINDER, mRequestWaitingForBinder);
 210     }
 211
 212     @Override
 213     public void onRemoteOperationFinish(RemoteOperation operation, RemoteOperationResult result) {
 214         super.onRemoteOperationFinish(operation, result);
 215
 216         if (operation instanceof CreateShareOperation) {
 217             onCreateShareOperationFinish((CreateShareOperation) operation, result);
 218
 219         } else if (operation instanceof UnshareLinkOperation) {
 220             onUnshareLinkOperationFinish((UnshareLinkOperation) operation, result);
 221
 222         } else if (operation instanceof RemoveFileOperation) {
 223             finish();
 224         }
 225     }
 226
 227
 228     private void onUnshareLinkOperationFinish(UnshareLinkOperation operation, RemoteOperationResult result) {
 229         if (result.isSuccess()) {
 230             OCFile file = getStorageManager().getFileByPath(getFile().getRemotePath());
 231             if (file != null) {
 232                 setFile(file);
 233             }
 234             invalidateOptionsMenu();
 235         } else if  (result.getCode() == ResultCode.SHARE_NOT_FOUND) {
 236             backToDisplayActivity();
 237         }
 238
 239     }
 240
 241     private void onCreateShareOperationFinish(CreateShareOperation operation, RemoteOperationResult result) {
 242         if (result.isSuccess()) {
 243             OCFile file = getStorageManager().getFileByPath(getFile().getRemotePath());
 244             if (file != null) {
 245                 setFile(file);
 246             }
 247             invalidateOptionsMenu();
 248         }
 249     }
 250
 251     @Override
 252     protected ServiceConnection newTransferenceServiceConnection() {
 253         return new PreviewImageServiceConnection();
 254     }
 255
 256     /** Defines callbacks for service binding, passed to bindService() */
 257     private class PreviewImageServiceConnection implements ServiceConnection {
 258
 259         @Override
 260         public void onServiceConnected(ComponentName component, IBinder service) {
 261
 262             if (component.equals(new ComponentName(PreviewImageActivity.this, FileDownloader.class))) {
 263                 mDownloaderBinder = (FileDownloaderBinder) service;
 264                 if (mRequestWaitingForBinder) {
 265                     mRequestWaitingForBinder = false;
 266                     Log_OC.d(TAG, "Simulating reselection of current page after connection of download binder");
 267                     onPageSelected(mViewPager.getCurrentItem());
 268                 }
 269
 270             } else if (component.equals(new ComponentName(PreviewImageActivity.this, FileUploader.class))) {
 271                 Log_OC.d(TAG, "Upload service connected");
 272                 mUploaderBinder = (FileUploaderBinder) service;
 273             } else {
 274                 return;
 275             }
 276
 277         }
 278
 279         @Override
 280         public void onServiceDisconnected(ComponentName component) {
 281             if (component.equals(new ComponentName(PreviewImageActivity.this, FileDownloader.class))) {
 282                 Log_OC.d(TAG, "Download service suddenly disconnected");
 283                 mDownloaderBinder = null;
 284             } else if (component.equals(new ComponentName(PreviewImageActivity.this, FileUploader.class))) {
 285                 Log_OC.d(TAG, "Upload service suddenly disconnected");
 286                 mUploaderBinder = null;
 287             }
 288         }
 289     };
 290
 291
 292     @Override
 293     public void onStop() {
 294         super.onStop();
 295     }
 296
 297
 298     @Override
 299     public void onDestroy() {
 300         super.onDestroy();
 301     }
 302
 303     @Override
 304     public boolean onOptionsItemSelected(MenuItem item) {
 305         boolean returnValue = false;
 306
 307         switch(item.getItemId()){
 308         case android.R.id.home:
 309             backToDisplayActivity();
 310             returnValue = true;
 311             break;
 312         default:
 313                 returnValue = super.onOptionsItemSelected(item);
 314         }
 315
 316         return returnValue;
 317     }
 318
 319
 320     @Override
 321     protected void onResume() {
 322         super.onResume();
 323         //Log_OC.e(TAG, "ACTIVITY, ONRESUME");
 324         mDownloadFinishReceiver = new DownloadFinishReceiver();
 325
 326         IntentFilter filter = new IntentFilter(FileDownloader.getDownloadFinishMessage());
 327         filter.addAction(FileDownloader.getDownloadAddedMessage());
 328         registerReceiver(mDownloadFinishReceiver, filter);
 329     }
 330
 331     @Override
 332     protected void onPostResume() {
 333         //Log_OC.e(TAG, "ACTIVITY, ONPOSTRESUME");
 334         super.onPostResume();
 335     }
 336
 337     @Override
 338     public void onPause() {
 339         unregisterReceiver(mDownloadFinishReceiver);
 340         mDownloadFinishReceiver = null;
 341         super.onPause();
 342     }
 343
 344
 345     private void backToDisplayActivity() {
 346         finish();
 347     }
 348
 349     @Override
 350     public void showDetails(OCFile file) {
 351         Intent showDetailsIntent = new Intent(this, FileDisplayActivity.class);
 352         showDetailsIntent.setAction(FileDisplayActivity.ACTION_DETAILS);
 353         showDetailsIntent.putExtra(FileActivity.EXTRA_FILE, file);
 354         showDetailsIntent.putExtra(FileActivity.EXTRA_ACCOUNT, AccountUtils.getCurrentOwnCloudAccount(this));
 355         startActivity(showDetailsIntent);
 356         int pos = mPreviewImagePagerAdapter.getFilePosition(file);
 357         file = mPreviewImagePagerAdapter.getFileAt(pos);
 358
 359     }
 360
 361
 362     private void requestForDownload(OCFile file) {
 363         if (mDownloaderBinder == null) {
 364             Log_OC.d(TAG, "requestForDownload called without binder to download service");
 365
 366         } else if (!mDownloaderBinder.isDownloading(getAccount(), file)) {
 367             Intent i = new Intent(this, FileDownloader.class);
 368             i.putExtra(FileDownloader.EXTRA_ACCOUNT, getAccount());
 369             i.putExtra(FileDownloader.EXTRA_FILE, file);
 370             startService(i);
 371         }
 372     }
 373
 374     /**
 375      * This method will be invoked when a new page becomes selected. Animation is not necessarily complete.
 376      *
 377      *  @param  Position        Position index of the new selected page
 378      */
 379     @Override
 380     public void onPageSelected(int position) {
 381         if (mDownloaderBinder == null) {
 382             mRequestWaitingForBinder = true;
 383
 384         } else {
 385             OCFile currentFile = mPreviewImagePagerAdapter.getFileAt(position);
 386             getSupportActionBar().setTitle(currentFile.getFileName());
 387             if (!currentFile.isDown()) {
 388                 if (!mPreviewImagePagerAdapter.pendingErrorAt(position)) {
 389                     requestForDownload(currentFile);
 390                 }
 391             }
 392
 393             // Call to reset image zoom to initial state
 394             ((PreviewImagePagerAdapter) mViewPager.getAdapter()).resetZoom();
 395         }
 396
 397     }
 398
 399     /**
 400      * Called when the scroll state changes. Useful for discovering when the user begins dragging,
 401      * when the pager is automatically settling to the current page. when it is fully stopped/idle.
 402      *
 403      * @param   State       The new scroll state (SCROLL_STATE_IDLE, _DRAGGING, _SETTLING
 404      */
 405     @Override
 406     public void onPageScrollStateChanged(int state) {
 407     }
 408
 409     /**
 410      * This method will be invoked when the current page is scrolled, either as part of a programmatically
 411      * initiated smooth scroll or a user initiated touch scroll.
 412      *
 413      * @param   position                Position index of the first page currently being displayed.
 414      *                                  Page position+1 will be visible if positionOffset is nonzero.
 415      *
 416      * @param   positionOffset          Value from [0, 1) indicating the offset from the page at position.
 417      * @param   positionOffsetPixels    Value in pixels indicating the offset from position.
 418      */
 419     @Override
 420     public void onPageScrolled(int position, float positionOffset, int positionOffsetPixels) {
 421     }
 422
 423
 424     /**
 425      * Class waiting for broadcast events from the {@link FielDownloader} service.
 426      *
 427      * Updates the UI when a download is started or finished, provided that it is relevant for the
 428      * folder displayed in the gallery.
 429      */
 430     private class DownloadFinishReceiver extends BroadcastReceiver {
 431         @Override
 432         public void onReceive(Context context, Intent intent) {
 433             String accountName = intent.getStringExtra(FileDownloader.ACCOUNT_NAME);
 434             String downloadedRemotePath = intent.getStringExtra(FileDownloader.EXTRA_REMOTE_PATH);
 435             if (getAccount().name.equals(accountName) &&
 436                     downloadedRemotePath != null) {
 437
 438                 OCFile file = getStorageManager().getFileByPath(downloadedRemotePath);
 439                 int position = mPreviewImagePagerAdapter.getFilePosition(file);
 440                 boolean downloadWasFine = intent.getBooleanExtra(FileDownloader.EXTRA_DOWNLOAD_RESULT, false);
 441                 //boolean isOffscreen =  Math.abs((mViewPager.getCurrentItem() - position)) <= mViewPager.getOffscreenPageLimit();
 442
 443                 if (position >= 0 && intent.getAction().equals(FileDownloader.getDownloadFinishMessage())) {
 444                     if (downloadWasFine) {
 445                         mPreviewImagePagerAdapter.updateFile(position, file);
 446
 447                     } else {
 448                         mPreviewImagePagerAdapter.updateWithDownloadError(position);
 449                     }
 450                     mPreviewImagePagerAdapter.notifyDataSetChanged();   // will trigger the creation of new fragments
 451
 452                 } else {
 453                     Log_OC.d(TAG, "Download finished, but the fragment is offscreen");
 454                 }
 455
 456             }
 457             removeStickyBroadcast(intent);
 458         }
 459
 460     }
 461
 462     @SuppressLint("InlinedApi")
 463         public void toggleFullScreen() {
 464
 465         if (isHoneycombOrHigher()) {
 466
 467             boolean visible = (mFullScreenAnchorView.getSystemUiVisibility()
 468                     & View.SYSTEM_UI_FLAG_HIDE_NAVIGATION) == 0;
 469
 470             if (visible) {
 471                 hideSystemUI(mFullScreenAnchorView);
 472                 // actionBar.hide(); // propagated through
 473                 // OnSystemUiVisibilityChangeListener()
 474             } else {
 475                 showSystemUI(mFullScreenAnchorView);
 476                 // actionBar.show(); // propagated through
 477                 // OnSystemUiVisibilityChangeListener()
 478             }
 479
 480         } else {
 481
 482             ActionBar actionBar = getSupportActionBar();
 483             if (!actionBar.isShowing()) {
 484                 actionBar.show();
 485
 486             } else {
 487                 actionBar.hide();
 488
 489             }
 490
 491         }
 492     }
 493
 494     @Override
 495     protected void onAccountSet(boolean stateWasRecovered) {
 496         super.onAccountSet(stateWasRecovered);
 497         if (getAccount() != null) {
 498             OCFile file = getFile();
 499             /// Validate handled file  (first image to preview)
 500             if (file == null) {
 501                 throw new IllegalStateException("Instanced with a NULL OCFile");
 502             }
 503             if (!file.isImage()) {
 504                 throw new IllegalArgumentException("Non-image file passed as argument");
 505             }
 506
 507             // Update file according to DB file, if it is possible
 508             if (file.getFileId() > FileDataStorageManager.ROOT_PARENT_ID)
 509                 file = getStorageManager().getFileById(file.getFileId());
 510
 511             if (file != null) {
 512                 /// Refresh the activity according to the Account and OCFile set
 513                 setFile(file);  // reset after getting it fresh from storageManager
 514                 getSupportActionBar().setTitle(getFile().getFileName());
 515                 //if (!stateWasRecovered) {
 516                     initViewPager();
 517                 //}
 518
 519             } else {
 520                 // handled file not in the current Account
 521                 finish();
 522             }
 523         }
 524     }
 525
 526
 527     /**
 528      * Launch an intent to request the PIN code to the user before letting him use the app
 529      */
 530     private void requestPinCode() {
 531         boolean pinStart = false;
 532         SharedPreferences appPrefs = PreferenceManager.getDefaultSharedPreferences(getApplicationContext());
 533         pinStart = appPrefs.getBoolean("set_pincode", false);
 534         if (pinStart) {
 535             Intent i = new Intent(getApplicationContext(), PinCodeActivity.class);
 536             i.putExtra(PinCodeActivity.EXTRA_ACTIVITY, "PreviewImageActivity");
 537             startActivity(i);
 538         }
 539     }
 540
 541     @Override
 542     public void onBrowsedDownTo(OCFile folder) {
 543         // TODO Auto-generated method stub
 544
 545     }
 546
 547     @Override
 548     public void onTransferStateChanged(OCFile file, boolean downloading, boolean uploading) {
 549         // TODO Auto-generated method stub
 550
 551     }
 552
 553
 554     @SuppressLint("InlinedApi")
 555         private void hideSystemUI(View anchorView) {
 556         anchorView.setSystemUiVisibility(
 557                 View.SYSTEM_UI_FLAG_HIDE_NAVIGATION         // hides NAVIGATION BAR; Android >= 4.0
 558             |   View.SYSTEM_UI_FLAG_FULLSCREEN              // hides STATUS BAR;     Android >= 4.1
 559             |   View.SYSTEM_UI_FLAG_IMMERSIVE               // stays interactive;    Android >= 4.4
 560             |   View.SYSTEM_UI_FLAG_LAYOUT_STABLE           // draw full window;     Android >= 4.1
 561             |   View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN       // draw full window;     Android >= 4.1
 562             |   View.SYSTEM_UI_FLAG_LAYOUT_HIDE_NAVIGATION  // draw full window;     Android >= 4.1
 563         );
 564     }
 565
 566     @SuppressLint("InlinedApi")
 567     private void showSystemUI(View anchorView) {
 568         anchorView.setSystemUiVisibility(
 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     /**
 576      * Checks if OS version is Honeycomb one or higher
 577      *
 578      * @return boolean
 579      */
 580     private boolean isHoneycombOrHigher() {
 581         if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.HONEYCOMB) {
 582             return true;
 583         }
 584         return false;
 585     }
 586
 587 }