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
  34 import com.actionbarsherlock.app.ActionBar;
  35 import com.actionbarsherlock.app.SherlockFragmentActivity;
  36 import com.actionbarsherlock.view.MenuItem;
  37 import com.owncloud.android.datamodel.DataStorageManager;
  38 import com.owncloud.android.datamodel.FileDataStorageManager;
  39 import com.owncloud.android.datamodel.OCFile;
  40 import com.owncloud.android.files.services.FileDownloader;
  41 import com.owncloud.android.files.services.FileDownloader.FileDownloaderBinder;
  42 import com.owncloud.android.files.services.FileUploader;
  43 import com.owncloud.android.files.services.FileUploader.FileUploaderBinder;
  44 import com.owncloud.android.ui.activity.FileDetailActivity;
  45 import com.owncloud.android.ui.fragment.FileDetailFragment;
  46 import com.owncloud.android.ui.fragment.FileFragment;
  47
  48 import com.owncloud.android.AccountUtils;
  49 import com.owncloud.android.R;
  50
  51 /**
  52  *  Used as an utility to preview image files contained in an ownCloud account.
  53  *
  54  *  @author David A. Velasco
  55  */
  56 public class PreviewImageActivity extends SherlockFragmentActivity implements FileFragment.ContainerActivity, ViewPager.OnPageChangeListener {
  57
  58     public static final int DIALOG_SHORT_WAIT = 0;
  59
  60     public static final String TAG = PreviewImageActivity.class.getSimpleName();
  61
  62     public static final String KEY_WAITING_TO_PREVIEW = "WAITING_TO_PREVIEW";
  63     private static final String KEY_WAITING_FOR_BINDER = "WAITING_FOR_BINDER";
  64
  65     private OCFile mFile;
  66     private OCFile mParentFolder;
  67     private Account mAccount;
  68     private DataStorageManager mStorageManager;
  69
  70     private ViewPager mViewPager;
  71     private PreviewImagePagerAdapter mPreviewImagePagerAdapter;
  72
  73     private FileDownloaderBinder mDownloaderBinder = null;
  74     private ServiceConnection mDownloadConnection, mUploadConnection = null;
  75     private FileUploaderBinder mUploaderBinder = null;
  76
  77     private boolean mRequestWaitingForBinder;
  78
  79     private DownloadFinishReceiver mDownloadFinishReceiver;
  80
  81
  82     @Override
  83     protected void onCreate(Bundle savedInstanceState) {
  84         super.onCreate(savedInstanceState);
  85
  86         mFile = getIntent().getParcelableExtra(FileDetailFragment.EXTRA_FILE);
  87         mAccount = getIntent().getParcelableExtra(FileDetailFragment.EXTRA_ACCOUNT);
  88         if (mFile == null) {
  89             throw new IllegalStateException("Instanced with a NULL OCFile");
  90         }
  91         if (mAccount == null) {
  92             throw new IllegalStateException("Instanced with a NULL ownCloud Account");
  93         }
  94         if (!mFile.isImage()) {
  95             throw new IllegalArgumentException("Non-image file passed as argument");
  96         }
  97
  98         setContentView(R.layout.preview_image_activity);
  99
 100         ActionBar actionBar = getSupportActionBar();
 101         actionBar.setDisplayHomeAsUpEnabled(true);
 102         actionBar.setTitle(mFile.getFileName());
 103
 104         mStorageManager = new FileDataStorageManager(mAccount, getContentResolver());
 105         mParentFolder = mStorageManager.getFileById(mFile.getParentId());
 106         if (mParentFolder == null) {
 107             // should not be necessary
 108             mParentFolder = mStorageManager.getFileByPath(OCFile.PATH_SEPARATOR);
 109         }
 110
 111         if (savedInstanceState != null) {
 112             mRequestWaitingForBinder = savedInstanceState.getBoolean(KEY_WAITING_FOR_BINDER);
 113         } else {
 114             mRequestWaitingForBinder = false;
 115         }
 116
 117         createViewPager();
 118
 119     }
 120
 121     private void createViewPager() {
 122         mPreviewImagePagerAdapter = new PreviewImagePagerAdapter(getSupportFragmentManager(), mParentFolder, mAccount, mStorageManager);
 123         mViewPager = (ViewPager) findViewById(R.id.fragmentPager);
 124         int position = mPreviewImagePagerAdapter.getFilePosition(mFile);
 125         position = (position >= 0) ? position : 0;
 126         mViewPager.setAdapter(mPreviewImagePagerAdapter);
 127         mViewPager.setOnPageChangeListener(this);
 128         Log.e(TAG, "Setting initial position " + position);
 129         mViewPager.setCurrentItem(position);
 130         if (position == 0 && !mFile.isDown()) {
 131             // this is necessary because mViewPager.setCurrentItem(0) just after setting the adapter does not result in a call to #onPageSelected(0)
 132             mRequestWaitingForBinder = true;
 133         }
 134     }
 135
 136
 137     @Override
 138     public void onStart() {
 139         super.onStart();
 140         Log.e(TAG, "PREVIEW ACTIVITY ON START");
 141         mDownloadConnection = new PreviewImageServiceConnection();
 142         bindService(new Intent(this, FileDownloader.class), mDownloadConnection, Context.BIND_AUTO_CREATE);
 143         mUploadConnection = new PreviewImageServiceConnection();
 144         bindService(new Intent(this, FileUploader.class), mUploadConnection, Context.BIND_AUTO_CREATE);
 145     }
 146
 147     @Override
 148     protected void onSaveInstanceState(Bundle outState) {
 149         super.onSaveInstanceState(outState);
 150         outState.putBoolean(KEY_WAITING_FOR_BINDER, mRequestWaitingForBinder);
 151     }
 152
 153
 154     /** Defines callbacks for service binding, passed to bindService() */
 155     private class PreviewImageServiceConnection implements ServiceConnection {
 156
 157         @Override
 158         public void onServiceConnected(ComponentName component, IBinder service) {
 159
 160             if (component.equals(new ComponentName(PreviewImageActivity.this, FileDownloader.class))) {
 161                 Log.e(TAG, "PREVIEW_IMAGE Download service connected");
 162                 mDownloaderBinder = (FileDownloaderBinder) service;
 163                 if (mRequestWaitingForBinder) {
 164                     mRequestWaitingForBinder = false;
 165                     Log.e(TAG, "Simulating reselection of current page after connection of download binder");
 166                     onPageSelected(mViewPager.getCurrentItem());
 167                 }
 168
 169             } else if (component.equals(new ComponentName(PreviewImageActivity.this, FileUploader.class))) {
 170                 Log.d(TAG, "Upload service connected");
 171                 mUploaderBinder = (FileUploaderBinder) service;
 172             } else {
 173                 return;
 174             }
 175
 176         }
 177
 178         @Override
 179         public void onServiceDisconnected(ComponentName component) {
 180             if (component.equals(new ComponentName(PreviewImageActivity.this, FileDownloader.class))) {
 181                 Log.d(TAG, "Download service suddenly disconnected");
 182                 mDownloaderBinder = null;
 183             } else if (component.equals(new ComponentName(PreviewImageActivity.this, FileUploader.class))) {
 184                 Log.d(TAG, "Upload service suddenly disconnected");
 185                 mUploaderBinder = null;
 186             }
 187         }
 188     };
 189
 190
 191     @Override
 192     public void onStop() {
 193         super.onStop();
 194         if (mDownloadConnection != null) {
 195             unbindService(mDownloadConnection);
 196             mDownloadConnection = null;
 197         }
 198         if (mUploadConnection != null) {
 199             unbindService(mUploadConnection);
 200             mUploadConnection = null;
 201         }
 202     }
 203
 204
 205     @Override
 206     public void onDestroy() {
 207         super.onDestroy();
 208     }
 209
 210
 211     @Override
 212     public boolean onOptionsItemSelected(MenuItem item) {
 213         boolean returnValue = false;
 214
 215         switch(item.getItemId()){
 216         case android.R.id.home:
 217             backToDisplayActivity();
 218             returnValue = true;
 219             break;
 220         default:
 221                 returnValue = super.onOptionsItemSelected(item);
 222         }
 223
 224         return returnValue;
 225     }
 226
 227
 228     @Override
 229     protected void onResume() {
 230         super.onResume();
 231         Log.e(TAG, "PREVIEW ACTIVITY ONRESUME");
 232         mDownloadFinishReceiver = new DownloadFinishReceiver();
 233         IntentFilter filter = new IntentFilter(FileDownloader.DOWNLOAD_FINISH_MESSAGE);
 234         registerReceiver(mDownloadFinishReceiver, filter);
 235     }
 236
 237
 238     @Override
 239     protected void onPostResume() {
 240         super.onPostResume();
 241         Log.e(TAG, "PREVIEW ACTIVITY ONPOSTRESUME");
 242     }
 243
 244     @Override
 245     public void onPause() {
 246         super.onPause();
 247         unregisterReceiver(mDownloadFinishReceiver);
 248         mDownloadFinishReceiver = null;
 249     }
 250
 251
 252     private void backToDisplayActivity() {
 253         /*
 254         Intent intent = new Intent(this, FileDisplayActivity.class);
 255         intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
 256         intent.putExtra(FileDetailFragment.EXTRA_FILE, mFile);
 257         intent.putExtra(FileDetailFragment.EXTRA_ACCOUNT, mAccount);
 258         startActivity(intent);
 259         */
 260         finish();
 261     }
 262
 263
 264     @Override
 265     protected Dialog onCreateDialog(int id) {
 266         Dialog dialog = null;
 267         switch (id) {
 268         case DIALOG_SHORT_WAIT: {
 269             ProgressDialog working_dialog = new ProgressDialog(this);
 270             working_dialog.setMessage(getResources().getString(
 271                     R.string.wait_a_moment));
 272             working_dialog.setIndeterminate(true);
 273             working_dialog.setCancelable(false);
 274             dialog = working_dialog;
 275             break;
 276         }
 277         default:
 278             dialog = null;
 279         }
 280         return dialog;
 281     }
 282
 283
 284     /**
 285      * {@inheritDoc}
 286      */
 287     @Override
 288     public void onFileStateChanged() {
 289         // nothing to do here!
 290     }
 291
 292
 293     /**
 294      * {@inheritDoc}
 295      */
 296     @Override
 297     public FileDownloaderBinder getFileDownloaderBinder() {
 298         return mDownloaderBinder;
 299     }
 300
 301
 302     @Override
 303     public FileUploaderBinder getFileUploaderBinder() {
 304         return mUploaderBinder;
 305     }
 306
 307
 308     @Override
 309     public void showFragmentWithDetails(OCFile file) {
 310         Intent showDetailsIntent = new Intent(this, FileDetailActivity.class);
 311         showDetailsIntent.putExtra(FileDetailFragment.EXTRA_FILE, file);
 312         showDetailsIntent.putExtra(FileDetailFragment.EXTRA_ACCOUNT, AccountUtils.getCurrentOwnCloudAccount(this));
 313         showDetailsIntent.putExtra(FileDetailActivity.EXTRA_MODE, FileDetailActivity.MODE_DETAILS);
 314         startActivity(showDetailsIntent);
 315     }
 316
 317
 318     private void requestForDownload(OCFile file) {
 319         Log.e(TAG, "REQUEST FOR DOWNLOAD : " + file.getFileName());
 320         if (mDownloaderBinder == null) {
 321             Log.e(TAG, "requestForDownload called without binder to download service");
 322
 323         } else if (!mDownloaderBinder.isDownloading(mAccount, file)) {
 324             Intent i = new Intent(this, FileDownloader.class);
 325             i.putExtra(FileDownloader.EXTRA_ACCOUNT, mAccount);
 326             i.putExtra(FileDownloader.EXTRA_FILE, file);
 327             startService(i);
 328         }
 329     }
 330
 331     @Override
 332     public void notifySuccessfulDownload(OCFile file, Intent intent, boolean success) {
 333         /*
 334         if (success) {
 335             if (mWaitingToPreview != null && mWaitingToPreview.equals(file)) {
 336                 mWaitingToPreview = null;
 337                 int position = mViewPager.getCurrentItem();
 338                 mPreviewImagePagerAdapter.updateFile(position, file);
 339                 Log.e(TAG, "BEFORE NOTIFY DATA SET CHANGED");
 340                 mPreviewImagePagerAdapter.notifyDataSetChanged();
 341                 Log.e(TAG, "AFTER NOTIFY DATA SET CHANGED");
 342             }
 343         }
 344         */
 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         Log.e(TAG, "onPageSelected " + position);
 356         if (mDownloaderBinder == null) {
 357             mRequestWaitingForBinder = true;
 358
 359         } else {
 360             OCFile currentFile = mPreviewImagePagerAdapter.getFileAt(position);
 361             getSupportActionBar().setTitle(currentFile.getFileName());
 362             if (!currentFile.isDown()) {
 363                 requestForDownload(currentFile);
 364                 //updateCurrentDownloadFragment(true);
 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, or 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     private void updateCurrentDownloadFragment(boolean transferring) {
 395         FileFragment fragment = mPreviewImagePagerAdapter.getFragmentAt(mViewPager.getCurrentItem());
 396         if (fragment instanceof FileDownloadFragment) {
 397             ((FileDownloadFragment) fragment).updateView(transferring);
 398             //mViewPager.invalidate();
 399         }
 400     }
 401
 402
 403     /**
 404      * Class waiting for broadcast events from the {@link FielDownloader} service.
 405      *
 406      * Updates the UI when a download is started or finished, provided that it is relevant for the
 407      * folder displayed in the gallery.
 408      */
 409     private class DownloadFinishReceiver extends BroadcastReceiver {
 410         @Override
 411         public void onReceive(Context context, Intent intent) {
 412             String accountName = intent.getStringExtra(FileDownloader.ACCOUNT_NAME);
 413             String downloadedRemotePath = intent.getStringExtra(FileDownloader.EXTRA_REMOTE_PATH);
 414             if (mAccount.name.equals(accountName) &&
 415                     downloadedRemotePath != null) {
 416
 417                 OCFile file = mStorageManager.getFileByPath(downloadedRemotePath);
 418                 int position = mPreviewImagePagerAdapter.getFilePosition(file);
 419                 boolean downloadWasFine = intent.getBooleanExtra(FileDownloader.EXTRA_DOWNLOAD_RESULT, false);
 420                 boolean isCurrent =  (mViewPager.getCurrentItem() == position);
 421
 422                 if (position >= 0) {
 423                     /// ITS MY BUSSINESS
 424                     Log.e(TAG, "downloaded file FOUND in adapter");
 425                     if (downloadWasFine) {
 426                         mPreviewImagePagerAdapter.updateFile(position, file);
 427                         //Log.e(TAG, "BEFORE NOTIFY DATA SET CHANGED");
 428                         mPreviewImagePagerAdapter.notifyDataSetChanged();
 429                         //Log.e(TAG, "AFTER NOTIFY DATA SET CHANGED");
 430
 431                     } else if (isCurrent) {
 432                         updateCurrentDownloadFragment(false);
 433                     }
 434
 435                 } else {
 436                     Log.e(TAG, "DOWNLOADED FILE NOT FOUND IN ADAPTER ");
 437                 }
 438
 439             }
 440             removeStickyBroadcast(intent);
 441         }
 442
 443     }
 444
 445
 446 }