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.content.BroadcastReceiver;
  20 import android.content.ComponentName;
  21 import android.content.Context;
  22 import android.content.Intent;
  23 import android.content.IntentFilter;
  24 import android.content.ServiceConnection;
  25 import android.content.SharedPreferences;
  26 import android.os.Bundle;
  27 import android.os.IBinder;
  28 import android.preference.PreferenceManager;
  29 import android.support.v4.app.Fragment;
  30 import android.support.v4.app.FragmentManager;
  31 import android.support.v4.app.FragmentTransaction;
  32 import android.support.v4.view.ViewPager;
  33 import android.view.MotionEvent;
  34 import android.view.View;
  35 import android.view.View.OnTouchListener;
  36
  37 import com.actionbarsherlock.app.ActionBar;
  38 import com.actionbarsherlock.view.MenuItem;
  39 import com.actionbarsherlock.view.Window;
  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.FileUploader;
  46 import com.owncloud.android.files.services.FileDownloader.FileDownloaderBinder;
  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.operations.CreateShareOperation;
  53 import com.owncloud.android.operations.UnshareLinkOperation;
  54 import com.owncloud.android.ui.activity.FileActivity;
  55 import com.owncloud.android.ui.activity.FileDisplayActivity;
  56 import com.owncloud.android.ui.activity.PinCodeActivity;
  57 import com.owncloud.android.ui.dialog.LoadingDialog;
  58 import com.owncloud.android.ui.fragment.FileFragment;
  59 import com.owncloud.android.utils.DisplayUtils;
  60 import com.owncloud.android.utils.Log_OC;
  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 FileFragment.ContainerActivity, ViewPager.OnPageChangeListener, OnTouchListener , OnRemoteOperationListener{
  69
  70     public static final int DIALOG_SHORT_WAIT = 0;
  71
  72     public static final String TAG = PreviewImageActivity.class.getSimpleName();
  73
  74     public static final String KEY_WAITING_TO_PREVIEW = "WAITING_TO_PREVIEW";
  75     private static final String KEY_WAITING_FOR_BINDER = "WAITING_FOR_BINDER";
  76
  77     private static final String DIALOG_WAIT_TAG = "DIALOG_WAIT";
  78
  79     private ViewPager mViewPager;
  80     private PreviewImagePagerAdapter mPreviewImagePagerAdapter;
  81
  82     private FileDownloaderBinder mDownloaderBinder = null;
  83     private ServiceConnection mDownloadConnection, mUploadConnection = null;
  84     private FileUploaderBinder mUploaderBinder = null;
  85
  86     private boolean mRequestWaitingForBinder;
  87
  88     private DownloadFinishReceiver mDownloadFinishReceiver;
  89
  90     private boolean mFullScreen;
  91
  92
  93     @Override
  94     protected void onCreate(Bundle savedInstanceState) {
  95         super.onCreate(savedInstanceState);
  96
  97         requestWindowFeature(Window.FEATURE_ACTION_BAR_OVERLAY);
  98         setContentView(R.layout.preview_image_activity);
  99
 100         ActionBar actionBar = getSupportActionBar();
 101         actionBar.setIcon(DisplayUtils.getSeasonalIconId());
 102         actionBar.setDisplayHomeAsUpEnabled(true);
 103         actionBar.hide();
 104
 105         // PIN CODE request
 106         if (getIntent().getExtras() != null && savedInstanceState == null && fromNotification()) {
 107             requestPinCode();
 108         }
 109
 110         mFullScreen = true;
 111         if (savedInstanceState != null) {
 112             mRequestWaitingForBinder = savedInstanceState.getBoolean(KEY_WAITING_FOR_BINDER);
 113         } else {
 114             mRequestWaitingForBinder = false;
 115         }
 116
 117     }
 118
 119     private void initViewPager() {
 120         // get parent from path
 121         String parentPath = getFile().getRemotePath().substring(0, getFile().getRemotePath().lastIndexOf(getFile().getFileName()));
 122         OCFile parentFolder = getStorageManager().getFileByPath(parentPath);
 123         if (parentFolder == null) {
 124             // should not be necessary
 125             parentFolder = getStorageManager().getFileByPath(OCFile.ROOT_PATH);
 126         }
 127         mPreviewImagePagerAdapter = new PreviewImagePagerAdapter(getSupportFragmentManager(), parentFolder, getAccount(), getStorageManager());
 128         mViewPager = (ViewPager) findViewById(R.id.fragmentPager);
 129         int position = mPreviewImagePagerAdapter.getFilePosition(getFile());
 130         position = (position >= 0) ? position : 0;
 131         mViewPager.setAdapter(mPreviewImagePagerAdapter);
 132         mViewPager.setOnPageChangeListener(this);
 133         mViewPager.setCurrentItem(position);
 134         if (position == 0 && !getFile().isDown()) {
 135             // this is necessary because mViewPager.setCurrentItem(0) just after setting the adapter does not result in a call to #onPageSelected(0)
 136             mRequestWaitingForBinder = true;
 137         }
 138     }
 139
 140
 141     @Override
 142     public void onStart() {
 143         super.onStart();
 144         mDownloadConnection = new PreviewImageServiceConnection();
 145         bindService(new Intent(this, FileDownloader.class), mDownloadConnection, Context.BIND_AUTO_CREATE);
 146         mUploadConnection = new PreviewImageServiceConnection();
 147         bindService(new Intent(this, FileUploader.class), mUploadConnection, Context.BIND_AUTO_CREATE);
 148     }
 149
 150     @Override
 151     protected void onSaveInstanceState(Bundle outState) {
 152         super.onSaveInstanceState(outState);
 153         outState.putBoolean(KEY_WAITING_FOR_BINDER, mRequestWaitingForBinder);
 154     }
 155
 156     @Override
 157     public void onRemoteOperationFinish(RemoteOperation operation, RemoteOperationResult result) {
 158         super.onRemoteOperationFinish(operation, result);
 159
 160         if (operation instanceof CreateShareOperation) {
 161             onCreateShareOperationFinish((CreateShareOperation) operation, result);
 162
 163         } else if (operation instanceof UnshareLinkOperation) {
 164             onUnshareLinkOperationFinish((UnshareLinkOperation) operation, result);
 165
 166         }
 167     }
 168
 169
 170     private void onUnshareLinkOperationFinish(UnshareLinkOperation operation, RemoteOperationResult result) {
 171         if (result.isSuccess()) {
 172             OCFile file = getStorageManager().getFileByPath(getFile().getRemotePath());
 173             if (file != null) {
 174                 setFile(file);
 175             }
 176             invalidateOptionsMenu();
 177         } else if  (result.getCode() == ResultCode.SHARE_NOT_FOUND) {
 178             backToDisplayActivity();
 179         }
 180
 181     }
 182
 183     private void onCreateShareOperationFinish(CreateShareOperation operation, RemoteOperationResult result) {
 184         if (result.isSuccess()) {
 185             OCFile file = getStorageManager().getFileByPath(getFile().getRemotePath());
 186             if (file != null) {
 187                 setFile(file);
 188             }
 189             invalidateOptionsMenu();
 190         }
 191     }
 192
 193     /** Defines callbacks for service binding, passed to bindService() */
 194     private class PreviewImageServiceConnection implements ServiceConnection {
 195
 196         @Override
 197         public void onServiceConnected(ComponentName component, IBinder service) {
 198
 199             if (component.equals(new ComponentName(PreviewImageActivity.this, FileDownloader.class))) {
 200                 mDownloaderBinder = (FileDownloaderBinder) service;
 201                 if (mRequestWaitingForBinder) {
 202                     mRequestWaitingForBinder = false;
 203                     Log_OC.d(TAG, "Simulating reselection of current page after connection of download binder");
 204                     onPageSelected(mViewPager.getCurrentItem());
 205                 }
 206
 207             } else if (component.equals(new ComponentName(PreviewImageActivity.this, FileUploader.class))) {
 208                 Log_OC.d(TAG, "Upload service connected");
 209                 mUploaderBinder = (FileUploaderBinder) service;
 210             } else {
 211                 return;
 212             }
 213
 214         }
 215
 216         @Override
 217         public void onServiceDisconnected(ComponentName component) {
 218             if (component.equals(new ComponentName(PreviewImageActivity.this, FileDownloader.class))) {
 219                 Log_OC.d(TAG, "Download service suddenly disconnected");
 220                 mDownloaderBinder = null;
 221             } else if (component.equals(new ComponentName(PreviewImageActivity.this, FileUploader.class))) {
 222                 Log_OC.d(TAG, "Upload service suddenly disconnected");
 223                 mUploaderBinder = null;
 224             }
 225         }
 226     };
 227
 228
 229     @Override
 230     public void onStop() {
 231         super.onStop();
 232         if (mDownloadConnection != null) {
 233             unbindService(mDownloadConnection);
 234             mDownloadConnection = null;
 235         }
 236         if (mUploadConnection != null) {
 237             unbindService(mUploadConnection);
 238             mUploadConnection = null;
 239         }
 240     }
 241
 242
 243     @Override
 244     public void onDestroy() {
 245         super.onDestroy();
 246     }
 247
 248     @Override
 249     public boolean onOptionsItemSelected(MenuItem item) {
 250         boolean returnValue = false;
 251
 252         switch(item.getItemId()){
 253         case android.R.id.home:
 254             backToDisplayActivity();
 255             returnValue = true;
 256             break;
 257         default:
 258                 returnValue = super.onOptionsItemSelected(item);
 259         }
 260
 261         return returnValue;
 262     }
 263
 264
 265     @Override
 266     protected void onResume() {
 267         super.onResume();
 268         //Log.e(TAG, "ACTIVITY, ONRESUME");
 269         mDownloadFinishReceiver = new DownloadFinishReceiver();
 270
 271         IntentFilter filter = new IntentFilter(FileDownloader.getDownloadFinishMessage());
 272         filter.addAction(FileDownloader.getDownloadAddedMessage());
 273         registerReceiver(mDownloadFinishReceiver, filter);
 274     }
 275
 276     @Override
 277     protected void onPostResume() {
 278         //Log.e(TAG, "ACTIVITY, ONPOSTRESUME");
 279         super.onPostResume();
 280     }
 281
 282     @Override
 283     public void onPause() {
 284         super.onPause();
 285         unregisterReceiver(mDownloadFinishReceiver);
 286         mDownloadFinishReceiver = null;
 287     }
 288
 289
 290     private void backToDisplayActivity() {
 291         finish();
 292     }
 293
 294     /**
 295      * Show loading dialog
 296      */
 297     public void showLoadingDialog() {
 298         // Construct dialog
 299         LoadingDialog loading = new LoadingDialog(getResources().getString(R.string.wait_a_moment));
 300         FragmentManager fm = getSupportFragmentManager();
 301         FragmentTransaction ft = fm.beginTransaction();
 302         loading.show(ft, DIALOG_WAIT_TAG);
 303
 304     }
 305
 306     /**
 307      * Dismiss loading dialog
 308      */
 309     public void dismissLoadingDialog(){
 310         Fragment frag = getSupportFragmentManager().findFragmentByTag(DIALOG_WAIT_TAG);
 311       if (frag != null) {
 312           LoadingDialog loading = (LoadingDialog) frag;
 313             loading.dismiss();
 314         }
 315     }
 316
 317     /**
 318      * {@inheritDoc}
 319      */
 320     @Override
 321     public void onFileStateChanged() {
 322         // nothing to do here!
 323     }
 324
 325
 326     /**
 327      * {@inheritDoc}
 328      */
 329     @Override
 330     public FileDownloaderBinder getFileDownloaderBinder() {
 331         return mDownloaderBinder;
 332     }
 333
 334
 335     @Override
 336     public FileUploaderBinder getFileUploaderBinder() {
 337         return mUploaderBinder;
 338     }
 339
 340
 341     @Override
 342     public void showDetails(OCFile file) {
 343         Intent showDetailsIntent = new Intent(this, FileDisplayActivity.class);
 344         showDetailsIntent.setAction(FileDisplayActivity.ACTION_DETAILS);
 345         showDetailsIntent.putExtra(FileActivity.EXTRA_FILE, file);
 346         showDetailsIntent.putExtra(FileActivity.EXTRA_ACCOUNT, AccountUtils.getCurrentOwnCloudAccount(this));
 347         startActivity(showDetailsIntent);
 348         int pos = mPreviewImagePagerAdapter.getFilePosition(file);
 349         file = mPreviewImagePagerAdapter.getFileAt(pos);
 350
 351     }
 352
 353
 354     private void requestForDownload(OCFile file) {
 355         if (mDownloaderBinder == null) {
 356             Log_OC.d(TAG, "requestForDownload called without binder to download service");
 357
 358         } else if (!mDownloaderBinder.isDownloading(getAccount(), file)) {
 359             Intent i = new Intent(this, FileDownloader.class);
 360             i.putExtra(FileDownloader.EXTRA_ACCOUNT, getAccount());
 361             i.putExtra(FileDownloader.EXTRA_FILE, file);
 362             startService(i);
 363         }
 364     }
 365
 366     /**
 367      * This method will be invoked when a new page becomes selected. Animation is not necessarily complete.
 368      *
 369      *  @param  Position        Position index of the new selected page
 370      */
 371     @Override
 372     public void onPageSelected(int position) {
 373         if (mDownloaderBinder == null) {
 374             mRequestWaitingForBinder = true;
 375
 376         } else {
 377             OCFile currentFile = mPreviewImagePagerAdapter.getFileAt(position);
 378             getSupportActionBar().setTitle(currentFile.getFileName());
 379             if (!currentFile.isDown()) {
 380                 if (!mPreviewImagePagerAdapter.pendingErrorAt(position)) {
 381                     requestForDownload(currentFile);
 382                 }
 383             }
 384         }
 385     }
 386
 387     /**
 388      * Called when the scroll state changes. Useful for discovering when the user begins dragging,
 389      * when the pager is automatically settling to the current page. when it is fully stopped/idle.
 390      *
 391      * @param   State       The new scroll state (SCROLL_STATE_IDLE, _DRAGGING, _SETTLING
 392      */
 393     @Override
 394     public void onPageScrollStateChanged(int state) {
 395     }
 396
 397     /**
 398      * This method will be invoked when the current page is scrolled, either as part of a programmatically
 399      * initiated smooth scroll or a user initiated touch scroll.
 400      *
 401      * @param   position                Position index of the first page currently being displayed.
 402      *                                  Page position+1 will be visible if positionOffset is nonzero.
 403      *
 404      * @param   positionOffset          Value from [0, 1) indicating the offset from the page at position.
 405      * @param   positionOffsetPixels    Value in pixels indicating the offset from position.
 406      */
 407     @Override
 408     public void onPageScrolled(int position, float positionOffset, int positionOffsetPixels) {
 409     }
 410
 411
 412     /**
 413      * Class waiting for broadcast events from the {@link FielDownloader} service.
 414      *
 415      * Updates the UI when a download is started or finished, provided that it is relevant for the
 416      * folder displayed in the gallery.
 417      */
 418     private class DownloadFinishReceiver extends BroadcastReceiver {
 419         @Override
 420         public void onReceive(Context context, Intent intent) {
 421             String accountName = intent.getStringExtra(FileDownloader.ACCOUNT_NAME);
 422             String downloadedRemotePath = intent.getStringExtra(FileDownloader.EXTRA_REMOTE_PATH);
 423             if (getAccount().name.equals(accountName) &&
 424                     downloadedRemotePath != null) {
 425
 426                 OCFile file = getStorageManager().getFileByPath(downloadedRemotePath);
 427                 int position = mPreviewImagePagerAdapter.getFilePosition(file);
 428                 boolean downloadWasFine = intent.getBooleanExtra(FileDownloader.EXTRA_DOWNLOAD_RESULT, false);
 429                 //boolean isOffscreen =  Math.abs((mViewPager.getCurrentItem() - position)) <= mViewPager.getOffscreenPageLimit();
 430
 431                 if (position >= 0 && intent.getAction().equals(FileDownloader.getDownloadFinishMessage())) {
 432                     if (downloadWasFine) {
 433                         mPreviewImagePagerAdapter.updateFile(position, file);
 434
 435                     } else {
 436                         mPreviewImagePagerAdapter.updateWithDownloadError(position);
 437                     }
 438                     mPreviewImagePagerAdapter.notifyDataSetChanged();   // will trigger the creation of new fragments
 439
 440                 } else {
 441                     Log_OC.d(TAG, "Download finished, but the fragment is offscreen");
 442                 }
 443
 444             }
 445             removeStickyBroadcast(intent);
 446         }
 447
 448     }
 449
 450
 451     @Override
 452     public boolean onTouch(View v, MotionEvent event) {
 453         if (event.getAction() == MotionEvent.ACTION_UP) {
 454            toggleFullScreen();
 455         }
 456         return true;
 457     }
 458
 459
 460     private void toggleFullScreen() {
 461         ActionBar actionBar = getSupportActionBar();
 462         if (mFullScreen) {
 463             actionBar.show();
 464
 465         } else {
 466             actionBar.hide();
 467
 468         }
 469         mFullScreen = !mFullScreen;
 470     }
 471
 472     @Override
 473     protected void onAccountSet(boolean stateWasRecovered) {
 474         super.onAccountSet(stateWasRecovered);
 475         if (getAccount() != null) {
 476             OCFile file = getFile();
 477             /// Validate handled file  (first image to preview)
 478             if (file == null) {
 479                 throw new IllegalStateException("Instanced with a NULL OCFile");
 480             }
 481             if (!file.isImage()) {
 482                 throw new IllegalArgumentException("Non-image file passed as argument");
 483             }
 484
 485             // Update file according to DB file, if it is possible
 486             if (file.getFileId() > FileDataStorageManager.ROOT_PARENT_ID)
 487                 file = getStorageManager().getFileById(file.getFileId());
 488
 489             if (file != null) {
 490                 /// Refresh the activity according to the Account and OCFile set
 491                 setFile(file);  // reset after getting it fresh from storageManager
 492                 getSupportActionBar().setTitle(getFile().getFileName());
 493                 //if (!stateWasRecovered) {
 494                     initViewPager();
 495                 //}
 496
 497             } else {
 498                 // handled file not in the current Account
 499                 finish();
 500             }
 501         }
 502     }
 503
 504
 505     /**
 506      * Launch an intent to request the PIN code to the user before letting him use the app
 507      */
 508     private void requestPinCode() {
 509         boolean pinStart = false;
 510         SharedPreferences appPrefs = PreferenceManager.getDefaultSharedPreferences(getApplicationContext());
 511         pinStart = appPrefs.getBoolean("set_pincode", false);
 512         if (pinStart) {
 513             Intent i = new Intent(getApplicationContext(), PinCodeActivity.class);
 514             i.putExtra(PinCodeActivity.EXTRA_ACTIVITY, "PreviewImageActivity");
 515             startActivity(i);
 516         }
 517     }
 518
 519 }