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 as published by
   6  *   the Free Software Foundation, either version 2 of the License, or
   7  *   (at your option) any later version.
   8  *
   9  *   This program is distributed in the hope that it will be useful,
  10  *   but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12  *   GNU General Public License for more details.
  13  *
  14  *   You should have received a copy of the GNU General Public License
  15  *   along with this program.  If not, see <http://www.gnu.org/licenses/>.
  16  *
  17  */
  18 package com.owncloud.android.ui.preview;
  19
  20 import android.accounts.Account;
  21 import android.app.Dialog;
  22 import android.app.ProgressDialog;
  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.Bundle;
  30 import android.os.IBinder;
  31 import android.support.v4.view.ViewPager;
  32 import android.util.Log;
  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.app.SherlockFragmentActivity;
  39 import com.actionbarsherlock.view.MenuItem;
  40 import com.actionbarsherlock.view.Window;
  41 import com.owncloud.android.datamodel.DataStorageManager;
  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.ui.activity.FileDetailActivity;
  49 import com.owncloud.android.ui.fragment.FileDetailFragment;
  50 import com.owncloud.android.ui.fragment.FileFragment;
  51
  52 import com.owncloud.android.AccountUtils;
  53 import com.owncloud.android.R;
  54
  55 /**
  56  *  Used as an utility to preview image files contained in an ownCloud account.
  57  *
  58  *  @author David A. Velasco
  59  */
  60 public class PreviewImageActivity extends SherlockFragmentActivity implements FileFragment.ContainerActivity, ViewPager.OnPageChangeListener, OnTouchListener {
  61
  62     public static final int DIALOG_SHORT_WAIT = 0;
  63
  64     public static final String TAG = PreviewImageActivity.class.getSimpleName();
  65
  66     public static final String KEY_WAITING_TO_PREVIEW = "WAITING_TO_PREVIEW";
  67     private static final String KEY_WAITING_FOR_BINDER = "WAITING_FOR_BINDER";
  68
  69     private OCFile mFile;
  70     private OCFile mParentFolder;
  71     private Account mAccount;
  72     private DataStorageManager mStorageManager;
  73
  74     private ViewPager mViewPager;
  75     private PreviewImagePagerAdapter mPreviewImagePagerAdapter;
  76
  77     private FileDownloaderBinder mDownloaderBinder = null;
  78     private ServiceConnection mDownloadConnection, mUploadConnection = null;
  79     private FileUploaderBinder mUploaderBinder = null;
  80
  81     private boolean mRequestWaitingForBinder;
  82
  83     private DownloadFinishReceiver mDownloadFinishReceiver;
  84
  85     private boolean mFullScreen;
  86
  87
  88     @Override
  89     protected void onCreate(Bundle savedInstanceState) {
  90         super.onCreate(savedInstanceState);
  91
  92         mFile = getIntent().getParcelableExtra(FileDetailFragment.EXTRA_FILE);
  93         mAccount = getIntent().getParcelableExtra(FileDetailFragment.EXTRA_ACCOUNT);
  94         if (mFile == null) {
  95             throw new IllegalStateException("Instanced with a NULL OCFile");
  96         }
  97         if (mAccount == null) {
  98             throw new IllegalStateException("Instanced with a NULL ownCloud Account");
  99         }
 100         if (!mFile.isImage()) {
 101             throw new IllegalArgumentException("Non-image file passed as argument");
 102         }
 103         requestWindowFeature(Window.FEATURE_ACTION_BAR_OVERLAY);
 104         setContentView(R.layout.preview_image_activity);
 105
 106         ActionBar actionBar = getSupportActionBar();
 107         actionBar.setDisplayHomeAsUpEnabled(true);
 108         actionBar.setTitle(mFile.getFileName());
 109         actionBar.hide();
 110
 111         mFullScreen = true;
 112
 113         mStorageManager = new FileDataStorageManager(mAccount, getContentResolver());
 114         mParentFolder = mStorageManager.getFileById(mFile.getParentId());
 115         if (mParentFolder == null) {
 116             // should not be necessary
 117             mParentFolder = mStorageManager.getFileByPath(OCFile.PATH_SEPARATOR);
 118         }
 119
 120         if (savedInstanceState != null) {
 121             mRequestWaitingForBinder = savedInstanceState.getBoolean(KEY_WAITING_FOR_BINDER);
 122         } else {
 123             mRequestWaitingForBinder = false;
 124         }
 125
 126         createViewPager();
 127
 128     }
 129
 130     private void createViewPager() {
 131         mPreviewImagePagerAdapter = new PreviewImagePagerAdapter(getSupportFragmentManager(), mParentFolder, mAccount, mStorageManager);
 132         mViewPager = (ViewPager) findViewById(R.id.fragmentPager);
 133         int position = mPreviewImagePagerAdapter.getFilePosition(mFile);
 134         position = (position >= 0) ? position : 0;
 135         mViewPager.setAdapter(mPreviewImagePagerAdapter);
 136         mViewPager.setOnPageChangeListener(this);
 137         mViewPager.setCurrentItem(position);
 138         if (position == 0 && !mFile.isDown()) {
 139             // this is necessary because mViewPager.setCurrentItem(0) just after setting the adapter does not result in a call to #onPageSelected(0)
 140             mRequestWaitingForBinder = true;
 141         }
 142     }
 143
 144
 145     @Override
 146     public void onStart() {
 147         super.onStart();
 148         mDownloadConnection = new PreviewImageServiceConnection();
 149         bindService(new Intent(this, FileDownloader.class), mDownloadConnection, Context.BIND_AUTO_CREATE);
 150         mUploadConnection = new PreviewImageServiceConnection();
 151         bindService(new Intent(this, FileUploader.class), mUploadConnection, Context.BIND_AUTO_CREATE);
 152     }
 153
 154     @Override
 155     protected void onSaveInstanceState(Bundle outState) {
 156         super.onSaveInstanceState(outState);
 157         outState.putBoolean(KEY_WAITING_FOR_BINDER, mRequestWaitingForBinder);
 158     }
 159
 160
 161     /** Defines callbacks for service binding, passed to bindService() */
 162     private class PreviewImageServiceConnection implements ServiceConnection {
 163
 164         @Override
 165         public void onServiceConnected(ComponentName component, IBinder service) {
 166
 167             if (component.equals(new ComponentName(PreviewImageActivity.this, FileDownloader.class))) {
 168                 mDownloaderBinder = (FileDownloaderBinder) service;
 169                 if (mRequestWaitingForBinder) {
 170                     mRequestWaitingForBinder = false;
 171                     Log.d(TAG, "Simulating reselection of current page after connection of download binder");
 172                     onPageSelected(mViewPager.getCurrentItem());
 173                 }
 174
 175             } else if (component.equals(new ComponentName(PreviewImageActivity.this, FileUploader.class))) {
 176                 Log.d(TAG, "Upload service connected");
 177                 mUploaderBinder = (FileUploaderBinder) service;
 178             } else {
 179                 return;
 180             }
 181
 182         }
 183
 184         @Override
 185         public void onServiceDisconnected(ComponentName component) {
 186             if (component.equals(new ComponentName(PreviewImageActivity.this, FileDownloader.class))) {
 187                 Log.d(TAG, "Download service suddenly disconnected");
 188                 mDownloaderBinder = null;
 189             } else if (component.equals(new ComponentName(PreviewImageActivity.this, FileUploader.class))) {
 190                 Log.d(TAG, "Upload service suddenly disconnected");
 191                 mUploaderBinder = null;
 192             }
 193         }
 194     };
 195
 196
 197     @Override
 198     public void onStop() {
 199         super.onStop();
 200         if (mDownloadConnection != null) {
 201             unbindService(mDownloadConnection);
 202             mDownloadConnection = null;
 203         }
 204         if (mUploadConnection != null) {
 205             unbindService(mUploadConnection);
 206             mUploadConnection = null;
 207         }
 208     }
 209
 210
 211     @Override
 212     public void onDestroy() {
 213         super.onDestroy();
 214     }
 215
 216
 217     @Override
 218     public boolean onOptionsItemSelected(MenuItem item) {
 219         boolean returnValue = false;
 220
 221         switch(item.getItemId()){
 222         case android.R.id.home:
 223             backToDisplayActivity();
 224             returnValue = true;
 225             break;
 226         default:
 227                 returnValue = super.onOptionsItemSelected(item);
 228         }
 229
 230         return returnValue;
 231     }
 232
 233
 234     @Override
 235     protected void onResume() {
 236         super.onResume();
 237         mDownloadFinishReceiver = new DownloadFinishReceiver();
 238         IntentFilter filter = new IntentFilter(FileDownloader.DOWNLOAD_FINISH_MESSAGE);
 239         registerReceiver(mDownloadFinishReceiver, filter);
 240     }
 241
 242
 243     @Override
 244     protected void onPostResume() {
 245         super.onPostResume();
 246     }
 247
 248     @Override
 249     public void onPause() {
 250         super.onPause();
 251         unregisterReceiver(mDownloadFinishReceiver);
 252         mDownloadFinishReceiver = null;
 253     }
 254
 255
 256     private void backToDisplayActivity() {
 257         /*
 258         Intent intent = new Intent(this, FileDisplayActivity.class);
 259         intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
 260         intent.putExtra(FileDetailFragment.EXTRA_FILE, mFile);
 261         intent.putExtra(FileDetailFragment.EXTRA_ACCOUNT, mAccount);
 262         startActivity(intent);
 263         */
 264         finish();
 265     }
 266
 267
 268     @Override
 269     protected Dialog onCreateDialog(int id) {
 270         Dialog dialog = null;
 271         switch (id) {
 272         case DIALOG_SHORT_WAIT: {
 273             ProgressDialog working_dialog = new ProgressDialog(this);
 274             working_dialog.setMessage(getResources().getString(
 275                     R.string.wait_a_moment));
 276             working_dialog.setIndeterminate(true);
 277             working_dialog.setCancelable(false);
 278             dialog = working_dialog;
 279             break;
 280         }
 281         default:
 282             dialog = null;
 283         }
 284         return dialog;
 285     }
 286
 287
 288     /**
 289      * {@inheritDoc}
 290      */
 291     @Override
 292     public void onFileStateChanged() {
 293         // nothing to do here!
 294     }
 295
 296
 297     /**
 298      * {@inheritDoc}
 299      */
 300     @Override
 301     public FileDownloaderBinder getFileDownloaderBinder() {
 302         return mDownloaderBinder;
 303     }
 304
 305
 306     @Override
 307     public FileUploaderBinder getFileUploaderBinder() {
 308         return mUploaderBinder;
 309     }
 310
 311
 312     @Override
 313     public void showFragmentWithDetails(OCFile file) {
 314         Intent showDetailsIntent = new Intent(this, FileDetailActivity.class);
 315         showDetailsIntent.putExtra(FileDetailFragment.EXTRA_FILE, file);
 316         showDetailsIntent.putExtra(FileDetailFragment.EXTRA_ACCOUNT, AccountUtils.getCurrentOwnCloudAccount(this));
 317         showDetailsIntent.putExtra(FileDetailActivity.EXTRA_MODE, FileDetailActivity.MODE_DETAILS);
 318         startActivity(showDetailsIntent);
 319     }
 320
 321
 322     private void requestForDownload(OCFile file) {
 323         if (mDownloaderBinder == null) {
 324             Log.d(TAG, "requestForDownload called without binder to download service");
 325
 326         } else if (!mDownloaderBinder.isDownloading(mAccount, file)) {
 327             Intent i = new Intent(this, FileDownloader.class);
 328             i.putExtra(FileDownloader.EXTRA_ACCOUNT, mAccount);
 329             i.putExtra(FileDownloader.EXTRA_FILE, file);
 330             startService(i);
 331         }
 332     }
 333
 334     /**
 335      * This method will be invoked when a new page becomes selected. Animation is not necessarily complete.
 336      *
 337      *  @param  Position        Position index of the new selected page
 338      */
 339     @Override
 340     public void onPageSelected(int position) {
 341         if (mDownloaderBinder == null) {
 342             mRequestWaitingForBinder = true;
 343
 344         } else {
 345             OCFile currentFile = mPreviewImagePagerAdapter.getFileAt(position);
 346             getSupportActionBar().setTitle(currentFile.getFileName());
 347             if (!currentFile.isDown()) {
 348                 requestForDownload(currentFile);
 349             }
 350         }
 351     }
 352
 353     /**
 354      * Called when the scroll state changes. Useful for discovering when the user begins dragging,
 355      * when the pager is automatically settling to the current page, or when it is fully stopped/idle.
 356      *
 357      * @param   State       The new scroll state (SCROLL_STATE_IDLE, _DRAGGING, _SETTLING
 358      */
 359     @Override
 360     public void onPageScrollStateChanged(int state) {
 361     }
 362
 363     /**
 364      * This method will be invoked when the current page is scrolled, either as part of a programmatically
 365      * initiated smooth scroll or a user initiated touch scroll.
 366      *
 367      * @param   position                Position index of the first page currently being displayed.
 368      *                                  Page position+1 will be visible if positionOffset is nonzero.
 369      *
 370      * @param   positionOffset          Value from [0, 1) indicating the offset from the page at position.
 371      * @param   positionOffsetPixels    Value in pixels indicating the offset from position.
 372      */
 373     @Override
 374     public void onPageScrolled(int position, float positionOffset, int positionOffsetPixels) {
 375     }
 376
 377
 378     private void updateCurrentDownloadFragment(boolean transferring) {
 379         FileFragment fragment = mPreviewImagePagerAdapter.getFragmentAt(mViewPager.getCurrentItem());
 380         if (fragment instanceof FileDownloadFragment) {
 381             ((FileDownloadFragment) fragment).updateView(transferring);
 382             //mViewPager.invalidate();
 383         }
 384     }
 385
 386
 387     /**
 388      * Class waiting for broadcast events from the {@link FielDownloader} service.
 389      *
 390      * Updates the UI when a download is started or finished, provided that it is relevant for the
 391      * folder displayed in the gallery.
 392      */
 393     private class DownloadFinishReceiver extends BroadcastReceiver {
 394         @Override
 395         public void onReceive(Context context, Intent intent) {
 396             String accountName = intent.getStringExtra(FileDownloader.ACCOUNT_NAME);
 397             String downloadedRemotePath = intent.getStringExtra(FileDownloader.EXTRA_REMOTE_PATH);
 398             if (mAccount.name.equals(accountName) &&
 399                     downloadedRemotePath != null) {
 400
 401                 OCFile file = mStorageManager.getFileByPath(downloadedRemotePath);
 402                 int position = mPreviewImagePagerAdapter.getFilePosition(file);
 403                 boolean downloadWasFine = intent.getBooleanExtra(FileDownloader.EXTRA_DOWNLOAD_RESULT, false);
 404                 boolean isCurrent =  (mViewPager.getCurrentItem() == position);
 405
 406                 if (position >= 0) {
 407                     /// ITS MY BUSSINESS
 408                     if (downloadWasFine) {
 409                         mPreviewImagePagerAdapter.updateFile(position, file);
 410                         mPreviewImagePagerAdapter.notifyDataSetChanged();
 411
 412                     } else if (isCurrent) {
 413                         updateCurrentDownloadFragment(false);
 414                     }
 415
 416                 } else {
 417                     Log.e(TAG, "DOWNLOADED FILE NOT FOUND IN ADAPTER ");
 418                 }
 419
 420             }
 421             removeStickyBroadcast(intent);
 422         }
 423
 424     }
 425
 426
 427     @Override
 428     public boolean onTouch(View v, MotionEvent event) {
 429         if (event.getAction() == MotionEvent.ACTION_UP) {
 430            toggleFullScreen();
 431         }
 432         return true;
 433     }
 434
 435
 436     private void toggleFullScreen() {
 437         ActionBar actionBar = getSupportActionBar();
 438         if (mFullScreen) {
 439             actionBar.show();
 440
 441         } else {
 442             actionBar.hide();
 443
 444         }
 445         mFullScreen = !mFullScreen;
 446     }
 447
 448
 449 }