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.operations.common.OnRemoteOperationListener;
  49 import com.owncloud.android.lib.operations.common.RemoteOperation;
  50 import com.owncloud.android.lib.operations.common.RemoteOperationResult;
  51 import com.owncloud.android.operations.CreateShareOperation;
  52 import com.owncloud.android.ui.activity.FileActivity;
  53 import com.owncloud.android.ui.activity.FileDisplayActivity;
  54 import com.owncloud.android.ui.activity.PinCodeActivity;
  55 import com.owncloud.android.ui.dialog.LoadingDialog;
  56 import com.owncloud.android.ui.fragment.FileFragment;
  57 import com.owncloud.android.utils.DisplayUtils;
  58 import com.owncloud.android.utils.Log_OC;
  59
  60
  61 /**
  62  *  Holds a swiping galley where image files contained in an ownCloud directory are shown
  63  *
  64  *  @author David A. Velasco
  65  */
  66 public class PreviewImageActivity extends FileActivity implements FileFragment.ContainerActivity, ViewPager.OnPageChangeListener, OnTouchListener , OnRemoteOperationListener{
  67
  68     public static final int DIALOG_SHORT_WAIT = 0;
  69
  70     public static final String TAG = PreviewImageActivity.class.getSimpleName();
  71
  72     public static final String KEY_WAITING_TO_PREVIEW = "WAITING_TO_PREVIEW";
  73     private static final String KEY_WAITING_FOR_BINDER = "WAITING_FOR_BINDER";
  74
  75     private static final String DIALOG_WAIT_TAG = "DIALOG_WAIT";
  76
  77     private ViewPager mViewPager;
  78     private PreviewImagePagerAdapter mPreviewImagePagerAdapter;
  79
  80     private FileDownloaderBinder mDownloaderBinder = null;
  81     private ServiceConnection mDownloadConnection, mUploadConnection = null;
  82     private FileUploaderBinder mUploaderBinder = null;
  83
  84     private boolean mRequestWaitingForBinder;
  85
  86     private DownloadFinishReceiver mDownloadFinishReceiver;
  87
  88     private boolean mFullScreen;
  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         mFullScreen = true;
 109         if (savedInstanceState != null) {
 110             mRequestWaitingForBinder = savedInstanceState.getBoolean(KEY_WAITING_FOR_BINDER);
 111         } else {
 112             mRequestWaitingForBinder = false;
 113         }
 114
 115     }
 116
 117     private void initViewPager() {
 118         // get parent from path
 119         String parentPath = getFile().getRemotePath().substring(0, getFile().getRemotePath().lastIndexOf(getFile().getFileName()));
 120         OCFile parentFolder = getStorageManager().getFileByPath(parentPath);
 121         if (parentFolder == null) {
 122             // should not be necessary
 123             parentFolder = getStorageManager().getFileByPath(OCFile.ROOT_PATH);
 124         }
 125         mPreviewImagePagerAdapter = new PreviewImagePagerAdapter(getSupportFragmentManager(), parentFolder, getAccount(), getStorageManager());
 126         mViewPager = (ViewPager) findViewById(R.id.fragmentPager);
 127         int position = mPreviewImagePagerAdapter.getFilePosition(getFile());
 128         position = (position >= 0) ? position : 0;
 129         mViewPager.setAdapter(mPreviewImagePagerAdapter);
 130         mViewPager.setOnPageChangeListener(this);
 131         mViewPager.setCurrentItem(position);
 132         if (position == 0 && !getFile().isDown()) {
 133             // this is necessary because mViewPager.setCurrentItem(0) just after setting the adapter does not result in a call to #onPageSelected(0)
 134             mRequestWaitingForBinder = true;
 135         }
 136     }
 137
 138
 139     @Override
 140     public void onStart() {
 141         super.onStart();
 142         mDownloadConnection = new PreviewImageServiceConnection();
 143         bindService(new Intent(this, FileDownloader.class), mDownloadConnection, Context.BIND_AUTO_CREATE);
 144         mUploadConnection = new PreviewImageServiceConnection();
 145         bindService(new Intent(this, FileUploader.class), mUploadConnection, Context.BIND_AUTO_CREATE);
 146     }
 147
 148     @Override
 149     protected void onSaveInstanceState(Bundle outState) {
 150         super.onSaveInstanceState(outState);
 151         outState.putBoolean(KEY_WAITING_FOR_BINDER, mRequestWaitingForBinder);
 152     }
 153
 154     @Override
 155     public void onRemoteOperationFinish(RemoteOperation operation, RemoteOperationResult result) {
 156         super.onRemoteOperationFinish(operation, result);
 157
 158         if (operation instanceof CreateShareOperation) {
 159             onCreateShareOperationFinish((CreateShareOperation) operation, result);
 160
 161         }
 162     }
 163
 164     private void onCreateShareOperationFinish(CreateShareOperation operation, RemoteOperationResult result) {
 165         if (result.isSuccess()) {
 166             OCFile file = getStorageManager().getFileByPath(getFile().getRemotePath());
 167             if (file != null) {
 168                 setFile(file);
 169                 invalidateOptionsMenu();
 170             }
 171         }
 172     }
 173
 174     /** Defines callbacks for service binding, passed to bindService() */
 175     private class PreviewImageServiceConnection implements ServiceConnection {
 176
 177         @Override
 178         public void onServiceConnected(ComponentName component, IBinder service) {
 179
 180             if (component.equals(new ComponentName(PreviewImageActivity.this, FileDownloader.class))) {
 181                 mDownloaderBinder = (FileDownloaderBinder) service;
 182                 if (mRequestWaitingForBinder) {
 183                     mRequestWaitingForBinder = false;
 184                     Log_OC.d(TAG, "Simulating reselection of current page after connection of download binder");
 185                     onPageSelected(mViewPager.getCurrentItem());
 186                 }
 187
 188             } else if (component.equals(new ComponentName(PreviewImageActivity.this, FileUploader.class))) {
 189                 Log_OC.d(TAG, "Upload service connected");
 190                 mUploaderBinder = (FileUploaderBinder) service;
 191             } else {
 192                 return;
 193             }
 194
 195         }
 196
 197         @Override
 198         public void onServiceDisconnected(ComponentName component) {
 199             if (component.equals(new ComponentName(PreviewImageActivity.this, FileDownloader.class))) {
 200                 Log_OC.d(TAG, "Download service suddenly disconnected");
 201                 mDownloaderBinder = null;
 202             } else if (component.equals(new ComponentName(PreviewImageActivity.this, FileUploader.class))) {
 203                 Log_OC.d(TAG, "Upload service suddenly disconnected");
 204                 mUploaderBinder = null;
 205             }
 206         }
 207     };
 208
 209
 210     @Override
 211     public void onStop() {
 212         super.onStop();
 213         if (mDownloadConnection != null) {
 214             unbindService(mDownloadConnection);
 215             mDownloadConnection = null;
 216         }
 217         if (mUploadConnection != null) {
 218             unbindService(mUploadConnection);
 219             mUploadConnection = null;
 220         }
 221     }
 222
 223
 224     @Override
 225     public void onDestroy() {
 226         super.onDestroy();
 227     }
 228
 229
 230     @Override
 231     public boolean onOptionsItemSelected(MenuItem item) {
 232         boolean returnValue = false;
 233
 234         switch(item.getItemId()){
 235         case android.R.id.home:
 236             backToDisplayActivity();
 237             returnValue = true;
 238             break;
 239         default:
 240                 returnValue = super.onOptionsItemSelected(item);
 241         }
 242
 243         return returnValue;
 244     }
 245
 246
 247     @Override
 248     protected void onResume() {
 249         super.onResume();
 250         //Log.e(TAG, "ACTIVITY, ONRESUME");
 251         mDownloadFinishReceiver = new DownloadFinishReceiver();
 252
 253         IntentFilter filter = new IntentFilter(FileDownloader.getDownloadFinishMessage());
 254         filter.addAction(FileDownloader.getDownloadAddedMessage());
 255         registerReceiver(mDownloadFinishReceiver, filter);
 256     }
 257
 258     @Override
 259     protected void onPostResume() {
 260         //Log.e(TAG, "ACTIVITY, ONPOSTRESUME");
 261         super.onPostResume();
 262     }
 263
 264     @Override
 265     public void onPause() {
 266         super.onPause();
 267         unregisterReceiver(mDownloadFinishReceiver);
 268         mDownloadFinishReceiver = null;
 269     }
 270
 271
 272     private void backToDisplayActivity() {
 273         finish();
 274     }
 275
 276     /**
 277      * Show loading dialog
 278      */
 279     public void showLoadingDialog() {
 280         // Construct dialog
 281         LoadingDialog loading = new LoadingDialog(getResources().getString(R.string.wait_a_moment));
 282         FragmentManager fm = getSupportFragmentManager();
 283         FragmentTransaction ft = fm.beginTransaction();
 284         loading.show(ft, DIALOG_WAIT_TAG);
 285
 286     }
 287
 288     /**
 289      * Dismiss loading dialog
 290      */
 291     public void dismissLoadingDialog(){
 292         Fragment frag = getSupportFragmentManager().findFragmentByTag(DIALOG_WAIT_TAG);
 293       if (frag != null) {
 294           LoadingDialog loading = (LoadingDialog) frag;
 295             loading.dismiss();
 296         }
 297     }
 298
 299     /**
 300      * {@inheritDoc}
 301      */
 302     @Override
 303     public void onFileStateChanged() {
 304         // nothing to do here!
 305     }
 306
 307
 308     /**
 309      * {@inheritDoc}
 310      */
 311     @Override
 312     public FileDownloaderBinder getFileDownloaderBinder() {
 313         return mDownloaderBinder;
 314     }
 315
 316
 317     @Override
 318     public FileUploaderBinder getFileUploaderBinder() {
 319         return mUploaderBinder;
 320     }
 321
 322
 323     @Override
 324     public void showDetails(OCFile file) {
 325         Intent showDetailsIntent = new Intent(this, FileDisplayActivity.class);
 326         showDetailsIntent.setAction(FileDisplayActivity.ACTION_DETAILS);
 327         showDetailsIntent.putExtra(FileActivity.EXTRA_FILE, file);
 328         showDetailsIntent.putExtra(FileActivity.EXTRA_ACCOUNT, AccountUtils.getCurrentOwnCloudAccount(this));
 329         startActivity(showDetailsIntent);
 330         int pos = mPreviewImagePagerAdapter.getFilePosition(file);
 331         file = mPreviewImagePagerAdapter.getFileAt(pos);
 332
 333     }
 334
 335
 336     private void requestForDownload(OCFile file) {
 337         if (mDownloaderBinder == null) {
 338             Log_OC.d(TAG, "requestForDownload called without binder to download service");
 339
 340         } else if (!mDownloaderBinder.isDownloading(getAccount(), file)) {
 341             Intent i = new Intent(this, FileDownloader.class);
 342             i.putExtra(FileDownloader.EXTRA_ACCOUNT, getAccount());
 343             i.putExtra(FileDownloader.EXTRA_FILE, file);
 344             startService(i);
 345         }
 346     }
 347
 348     /**
 349      * This method will be invoked when a new page becomes selected. Animation is not necessarily complete.
 350      *
 351      *  @param  Position        Position index of the new selected page
 352      */
 353     @Override
 354     public void onPageSelected(int position) {
 355         if (mDownloaderBinder == null) {
 356             mRequestWaitingForBinder = true;
 357
 358         } else {
 359             OCFile currentFile = mPreviewImagePagerAdapter.getFileAt(position);
 360             getSupportActionBar().setTitle(currentFile.getFileName());
 361             if (!currentFile.isDown()) {
 362                 if (!mPreviewImagePagerAdapter.pendingErrorAt(position)) {
 363                     requestForDownload(currentFile);
 364                 }
 365             }
 366         }
 367     }
 368
 369     /**
 370      * Called when the scroll state changes. Useful for discovering when the user begins dragging,
 371      * when the pager is automatically settling to the current page. when it is fully stopped/idle.
 372      *
 373      * @param   State       The new scroll state (SCROLL_STATE_IDLE, _DRAGGING, _SETTLING
 374      */
 375     @Override
 376     public void onPageScrollStateChanged(int state) {
 377     }
 378
 379     /**
 380      * This method will be invoked when the current page is scrolled, either as part of a programmatically
 381      * initiated smooth scroll or a user initiated touch scroll.
 382      *
 383      * @param   position                Position index of the first page currently being displayed.
 384      *                                  Page position+1 will be visible if positionOffset is nonzero.
 385      *
 386      * @param   positionOffset          Value from [0, 1) indicating the offset from the page at position.
 387      * @param   positionOffsetPixels    Value in pixels indicating the offset from position.
 388      */
 389     @Override
 390     public void onPageScrolled(int position, float positionOffset, int positionOffsetPixels) {
 391     }
 392
 393
 394     /**
 395      * Class waiting for broadcast events from the {@link FielDownloader} service.
 396      *
 397      * Updates the UI when a download is started or finished, provided that it is relevant for the
 398      * folder displayed in the gallery.
 399      */
 400     private class DownloadFinishReceiver extends BroadcastReceiver {
 401         @Override
 402         public void onReceive(Context context, Intent intent) {
 403             String accountName = intent.getStringExtra(FileDownloader.ACCOUNT_NAME);
 404             String downloadedRemotePath = intent.getStringExtra(FileDownloader.EXTRA_REMOTE_PATH);
 405             if (getAccount().name.equals(accountName) &&
 406                     downloadedRemotePath != null) {
 407
 408                 OCFile file = getStorageManager().getFileByPath(downloadedRemotePath);
 409                 int position = mPreviewImagePagerAdapter.getFilePosition(file);
 410                 boolean downloadWasFine = intent.getBooleanExtra(FileDownloader.EXTRA_DOWNLOAD_RESULT, false);
 411                 //boolean isOffscreen =  Math.abs((mViewPager.getCurrentItem() - position)) <= mViewPager.getOffscreenPageLimit();
 412
 413                 if (position >= 0 && intent.getAction().equals(FileDownloader.getDownloadFinishMessage())) {
 414                     if (downloadWasFine) {
 415                         mPreviewImagePagerAdapter.updateFile(position, file);
 416
 417                     } else {
 418                         mPreviewImagePagerAdapter.updateWithDownloadError(position);
 419                     }
 420                     mPreviewImagePagerAdapter.notifyDataSetChanged();   // will trigger the creation of new fragments
 421
 422                 } else {
 423                     Log_OC.d(TAG, "Download finished, but the fragment is offscreen");
 424                 }
 425
 426             }
 427             removeStickyBroadcast(intent);
 428         }
 429
 430     }
 431
 432
 433     @Override
 434     public boolean onTouch(View v, MotionEvent event) {
 435         if (event.getAction() == MotionEvent.ACTION_UP) {
 436            toggleFullScreen();
 437         }
 438         return true;
 439     }
 440
 441
 442     private void toggleFullScreen() {
 443         ActionBar actionBar = getSupportActionBar();
 444         if (mFullScreen) {
 445             actionBar.show();
 446
 447         } else {
 448             actionBar.hide();
 449
 450         }
 451         mFullScreen = !mFullScreen;
 452     }
 453
 454     @Override
 455     protected void onAccountSet(boolean stateWasRecovered) {
 456         super.onAccountSet(stateWasRecovered);
 457         if (getAccount() != null) {
 458             OCFile file = getFile();
 459             /// Validate handled file  (first image to preview)
 460             if (file == null) {
 461                 throw new IllegalStateException("Instanced with a NULL OCFile");
 462             }
 463             if (!file.isImage()) {
 464                 throw new IllegalArgumentException("Non-image file passed as argument");
 465             }
 466
 467             // Update file according to DB file, if it is possible
 468             if (file.getFileId() > FileDataStorageManager.ROOT_PARENT_ID)
 469                 file = getStorageManager().getFileById(file.getFileId());
 470
 471             if (file != null) {
 472                 /// Refresh the activity according to the Account and OCFile set
 473                 setFile(file);  // reset after getting it fresh from storageManager
 474                 getSupportActionBar().setTitle(getFile().getFileName());
 475                 //if (!stateWasRecovered) {
 476                     initViewPager();
 477                 //}
 478
 479             } else {
 480                 // handled file not in the current Account
 481                 finish();
 482             }
 483         }
 484     }
 485
 486
 487     /**
 488      * Launch an intent to request the PIN code to the user before letting him use the app
 489      */
 490     private void requestPinCode() {
 491         boolean pinStart = false;
 492         SharedPreferences appPrefs = PreferenceManager.getDefaultSharedPreferences(getApplicationContext());
 493         pinStart = appPrefs.getBoolean("set_pincode", false);
 494         if (pinStart) {
 495             Intent i = new Intent(getApplicationContext(), PinCodeActivity.class);
 496             i.putExtra(PinCodeActivity.EXTRA_ACTIVITY, "PreviewImageActivity");
 497             startActivity(i);
 498         }
 499     }
 500
 501 }