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 org.apache.commons.httpclient.methods.PostMethod;
  20
  21 import android.accounts.Account;
  22 import android.app.Dialog;
  23 import android.app.ProgressDialog;
  24 import android.content.BroadcastReceiver;
  25 import android.content.ComponentName;
  26 import android.content.Context;
  27 import android.content.Intent;
  28 import android.content.IntentFilter;
  29 import android.content.ServiceConnection;
  30 import android.os.Bundle;
  31 import android.os.IBinder;
  32 import android.support.v4.app.Fragment;
  33 import android.support.v4.view.ViewPager;
  34 import android.util.Log;
  35 import android.view.MotionEvent;
  36 import android.view.View;
  37 import android.view.View.OnTouchListener;
  38
  39 import com.actionbarsherlock.app.ActionBar;
  40 import com.actionbarsherlock.app.SherlockFragmentActivity;
  41 import com.actionbarsherlock.view.MenuItem;
  42 import com.actionbarsherlock.view.Window;
  43 import com.owncloud.android.datamodel.DataStorageManager;
  44 import com.owncloud.android.datamodel.FileDataStorageManager;
  45 import com.owncloud.android.datamodel.OCFile;
  46 import com.owncloud.android.files.services.FileDownloader;
  47 import com.owncloud.android.files.services.FileDownloader.FileDownloaderBinder;
  48 import com.owncloud.android.files.services.FileUploader;
  49 import com.owncloud.android.files.services.FileUploader.FileUploaderBinder;
  50 import com.owncloud.android.ui.activity.FileDetailActivity;
  51 import com.owncloud.android.ui.fragment.FileDetailFragment;
  52 import com.owncloud.android.ui.fragment.FileFragment;
  53
  54 import com.owncloud.android.AccountUtils;
  55 import com.owncloud.android.R;
  56
  57 /**
  58  *  Used as an utility to preview image files contained in an ownCloud account.
  59  *
  60  *  @author David A. Velasco
  61  */
  62 public class PreviewImageActivity extends SherlockFragmentActivity implements FileFragment.ContainerActivity, ViewPager.OnPageChangeListener, OnTouchListener {
  63
  64     public static final int DIALOG_SHORT_WAIT = 0;
  65
  66     public static final String TAG = PreviewImageActivity.class.getSimpleName();
  67
  68     public static final String KEY_WAITING_TO_PREVIEW = "WAITING_TO_PREVIEW";
  69     private static final String KEY_WAITING_FOR_BINDER = "WAITING_FOR_BINDER";
  70
  71     private OCFile mFile;
  72     private OCFile mParentFolder;
  73     private Account mAccount;
  74     private DataStorageManager mStorageManager;
  75
  76     private ViewPager mViewPager;
  77     private PreviewImagePagerAdapter mPreviewImagePagerAdapter;
  78
  79     private FileDownloaderBinder mDownloaderBinder = null;
  80     private ServiceConnection mDownloadConnection, mUploadConnection = null;
  81     private FileUploaderBinder mUploaderBinder = null;
  82
  83     private boolean mRequestWaitingForBinder;
  84
  85     private DownloadFinishReceiver mDownloadFinishReceiver;
  86
  87     private boolean mFullScreen;
  88
  89
  90     @Override
  91     protected void onCreate(Bundle savedInstanceState) {
  92         super.onCreate(savedInstanceState);
  93
  94         mFile = getIntent().getParcelableExtra(FileDetailFragment.EXTRA_FILE);
  95         mAccount = getIntent().getParcelableExtra(FileDetailFragment.EXTRA_ACCOUNT);
  96         if (mFile == null) {
  97             throw new IllegalStateException("Instanced with a NULL OCFile");
  98         }
  99         if (mAccount == null) {
 100             throw new IllegalStateException("Instanced with a NULL ownCloud Account");
 101         }
 102         if (!mFile.isImage()) {
 103             throw new IllegalArgumentException("Non-image file passed as argument");
 104         }
 105         requestWindowFeature(Window.FEATURE_ACTION_BAR_OVERLAY);
 106         setContentView(R.layout.preview_image_activity);
 107
 108         ActionBar actionBar = getSupportActionBar();
 109         actionBar.setDisplayHomeAsUpEnabled(true);
 110         actionBar.setTitle(mFile.getFileName());
 111         actionBar.hide();
 112
 113         mFullScreen = true;
 114
 115         mStorageManager = new FileDataStorageManager(mAccount, getContentResolver());
 116         mParentFolder = mStorageManager.getFileById(mFile.getParentId());
 117         if (mParentFolder == null) {
 118             // should not be necessary
 119             mParentFolder = mStorageManager.getFileByPath(OCFile.PATH_SEPARATOR);
 120         }
 121
 122         if (savedInstanceState != null) {
 123             mRequestWaitingForBinder = savedInstanceState.getBoolean(KEY_WAITING_FOR_BINDER);
 124         } else {
 125             mRequestWaitingForBinder = false;
 126         }
 127
 128         createViewPager();
 129
 130     }
 131
 132     private void createViewPager() {
 133         mPreviewImagePagerAdapter = new PreviewImagePagerAdapter(getSupportFragmentManager(), mParentFolder, mAccount, mStorageManager);
 134         mViewPager = (ViewPager) findViewById(R.id.fragmentPager);
 135         int position = mPreviewImagePagerAdapter.getFilePosition(mFile);
 136         position = (position >= 0) ? position : 0;
 137         mViewPager.setAdapter(mPreviewImagePagerAdapter);
 138         mViewPager.setOnPageChangeListener(this);
 139         mViewPager.setCurrentItem(position);
 140         if (position == 0 && !mFile.isDown()) {
 141             // this is necessary because mViewPager.setCurrentItem(0) just after setting the adapter does not result in a call to #onPageSelected(0)
 142             mRequestWaitingForBinder = true;
 143         }
 144     }
 145
 146
 147     @Override
 148     public void onStart() {
 149         super.onStart();
 150         mDownloadConnection = new PreviewImageServiceConnection();
 151         bindService(new Intent(this, FileDownloader.class), mDownloadConnection, Context.BIND_AUTO_CREATE);
 152         mUploadConnection = new PreviewImageServiceConnection();
 153         bindService(new Intent(this, FileUploader.class), mUploadConnection, Context.BIND_AUTO_CREATE);
 154     }
 155
 156     @Override
 157     protected void onSaveInstanceState(Bundle outState) {
 158         super.onSaveInstanceState(outState);
 159         outState.putBoolean(KEY_WAITING_FOR_BINDER, mRequestWaitingForBinder);
 160     }
 161
 162
 163     /** Defines callbacks for service binding, passed to bindService() */
 164     private class PreviewImageServiceConnection implements ServiceConnection {
 165
 166         @Override
 167         public void onServiceConnected(ComponentName component, IBinder service) {
 168
 169             if (component.equals(new ComponentName(PreviewImageActivity.this, FileDownloader.class))) {
 170                 mDownloaderBinder = (FileDownloaderBinder) service;
 171                 if (mRequestWaitingForBinder) {
 172                     mRequestWaitingForBinder = false;
 173                     Log.d(TAG, "Simulating reselection of current page after connection of download binder");
 174                     onPageSelected(mViewPager.getCurrentItem());
 175                 }
 176
 177             } else if (component.equals(new ComponentName(PreviewImageActivity.this, FileUploader.class))) {
 178                 Log.d(TAG, "Upload service connected");
 179                 mUploaderBinder = (FileUploaderBinder) service;
 180             } else {
 181                 return;
 182             }
 183
 184         }
 185
 186         @Override
 187         public void onServiceDisconnected(ComponentName component) {
 188             if (component.equals(new ComponentName(PreviewImageActivity.this, FileDownloader.class))) {
 189                 Log.d(TAG, "Download service suddenly disconnected");
 190                 mDownloaderBinder = null;
 191             } else if (component.equals(new ComponentName(PreviewImageActivity.this, FileUploader.class))) {
 192                 Log.d(TAG, "Upload service suddenly disconnected");
 193                 mUploaderBinder = null;
 194             }
 195         }
 196     };
 197
 198
 199     @Override
 200     public void onStop() {
 201         super.onStop();
 202         if (mDownloadConnection != null) {
 203             unbindService(mDownloadConnection);
 204             mDownloadConnection = null;
 205         }
 206         if (mUploadConnection != null) {
 207             unbindService(mUploadConnection);
 208             mUploadConnection = null;
 209         }
 210     }
 211
 212
 213     @Override
 214     public void onDestroy() {
 215         super.onDestroy();
 216     }
 217
 218
 219     @Override
 220     public boolean onOptionsItemSelected(MenuItem item) {
 221         boolean returnValue = false;
 222
 223         switch(item.getItemId()){
 224         case android.R.id.home:
 225             backToDisplayActivity();
 226             returnValue = true;
 227             break;
 228         default:
 229                 returnValue = super.onOptionsItemSelected(item);
 230         }
 231
 232         return returnValue;
 233     }
 234
 235
 236     @Override
 237     protected void onResume() {
 238         super.onResume();
 239         //Log.e(TAG, "ACTIVITY, ONRESUME");
 240         mDownloadFinishReceiver = new DownloadFinishReceiver();
 241         IntentFilter filter = new IntentFilter(FileDownloader.DOWNLOAD_FINISH_MESSAGE);
 242         filter.addAction(FileDownloader.DOWNLOAD_ADDED_MESSAGE);
 243         registerReceiver(mDownloadFinishReceiver, filter);
 244     }
 245
 246     @Override
 247     protected void onPostResume() {
 248         //Log.e(TAG, "ACTIVITY, ONPOSTRESUME");
 249         super.onPostResume();
 250     }
 251
 252     @Override
 253     public void onPause() {
 254         super.onPause();
 255         unregisterReceiver(mDownloadFinishReceiver);
 256         mDownloadFinishReceiver = null;
 257     }
 258
 259
 260     private void backToDisplayActivity() {
 261         /*
 262         Intent intent = new Intent(this, FileDisplayActivity.class);
 263         intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
 264         intent.putExtra(FileDetailFragment.EXTRA_FILE, mFile);
 265         intent.putExtra(FileDetailFragment.EXTRA_ACCOUNT, mAccount);
 266         startActivity(intent);
 267         */
 268         finish();
 269     }
 270
 271
 272     @Override
 273     protected Dialog onCreateDialog(int id) {
 274         Dialog dialog = null;
 275         switch (id) {
 276         case DIALOG_SHORT_WAIT: {
 277             ProgressDialog working_dialog = new ProgressDialog(this);
 278             working_dialog.setMessage(getResources().getString(
 279                     R.string.wait_a_moment));
 280             working_dialog.setIndeterminate(true);
 281             working_dialog.setCancelable(false);
 282             dialog = working_dialog;
 283             break;
 284         }
 285         default:
 286             dialog = null;
 287         }
 288         return dialog;
 289     }
 290
 291
 292     /**
 293      * {@inheritDoc}
 294      */
 295     @Override
 296     public void onFileStateChanged() {
 297         // nothing to do here!
 298     }
 299
 300
 301     /**
 302      * {@inheritDoc}
 303      */
 304     @Override
 305     public FileDownloaderBinder getFileDownloaderBinder() {
 306         return mDownloaderBinder;
 307     }
 308
 309
 310     @Override
 311     public FileUploaderBinder getFileUploaderBinder() {
 312         return mUploaderBinder;
 313     }
 314
 315
 316     @Override
 317     public void showFragmentWithDetails(OCFile file) {
 318         Intent showDetailsIntent = new Intent(this, FileDetailActivity.class);
 319         showDetailsIntent.putExtra(FileDetailFragment.EXTRA_FILE, file);
 320         showDetailsIntent.putExtra(FileDetailFragment.EXTRA_ACCOUNT, AccountUtils.getCurrentOwnCloudAccount(this));
 321         showDetailsIntent.putExtra(FileDetailActivity.EXTRA_MODE, FileDetailActivity.MODE_DETAILS);
 322         startActivity(showDetailsIntent);
 323         int pos = mPreviewImagePagerAdapter.getFilePosition(file);
 324         file = mPreviewImagePagerAdapter.getFileAt(pos);
 325
 326     }
 327
 328
 329     private void requestForDownload(OCFile file) {
 330         if (mDownloaderBinder == null) {
 331             Log.d(TAG, "requestForDownload called without binder to download service");
 332
 333         } else if (!mDownloaderBinder.isDownloading(mAccount, file)) {
 334             Intent i = new Intent(this, FileDownloader.class);
 335             i.putExtra(FileDownloader.EXTRA_ACCOUNT, mAccount);
 336             i.putExtra(FileDownloader.EXTRA_FILE, file);
 337             startService(i);
 338         }
 339     }
 340
 341     /**
 342      * This method will be invoked when a new page becomes selected. Animation is not necessarily complete.
 343      *
 344      *  @param  Position        Position index of the new selected page
 345      */
 346     @Override
 347     public void onPageSelected(int position) {
 348         if (mDownloaderBinder == null) {
 349             mRequestWaitingForBinder = true;
 350
 351         } else {
 352             OCFile currentFile = mPreviewImagePagerAdapter.getFileAt(position);
 353             getSupportActionBar().setTitle(currentFile.getFileName());
 354             if (!currentFile.isDown()) {
 355                 if (!mPreviewImagePagerAdapter.pendingErrorAt(position)) {
 356                     requestForDownload(currentFile);
 357                 }
 358             }
 359         }
 360     }
 361
 362     /**
 363      * Called when the scroll state changes. Useful for discovering when the user begins dragging,
 364      * when the pager is automatically settling to the current page. when it is fully stopped/idle.
 365      *
 366      * @param   State       The new scroll state (SCROLL_STATE_IDLE, _DRAGGING, _SETTLING
 367      */
 368     @Override
 369     public void onPageScrollStateChanged(int state) {
 370     }
 371
 372     /**
 373      * This method will be invoked when the current page is scrolled, either as part of a programmatically
 374      * initiated smooth scroll or a user initiated touch scroll.
 375      *
 376      * @param   position                Position index of the first page currently being displayed.
 377      *                                  Page position+1 will be visible if positionOffset is nonzero.
 378      *
 379      * @param   positionOffset          Value from [0, 1) indicating the offset from the page at position.
 380      * @param   positionOffsetPixels    Value in pixels indicating the offset from position.
 381      */
 382     @Override
 383     public void onPageScrolled(int position, float positionOffset, int positionOffsetPixels) {
 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 isOffscreen =  Math.abs((mViewPager.getCurrentItem() - position)) <= mViewPager.getOffscreenPageLimit();
 405
 406                 if (position >= 0 && intent.getAction().equals(FileDownloader.DOWNLOAD_FINISH_MESSAGE)) {
 407                     if (downloadWasFine) {
 408                         mPreviewImagePagerAdapter.updateFile(position, file);
 409
 410                     } else {
 411                         mPreviewImagePagerAdapter.updateWithDownloadError(position);
 412                     }
 413                     mPreviewImagePagerAdapter.notifyDataSetChanged();   // will trigger the creation of new fragments
 414
 415                 } else {
 416                     Log.d(TAG, "Download finished, but the fragment is offscreen");
 417                 }
 418
 419             }
 420             removeStickyBroadcast(intent);
 421         }
 422
 423     }
 424
 425
 426     @Override
 427     public boolean onTouch(View v, MotionEvent event) {
 428         if (event.getAction() == MotionEvent.ACTION_UP) {
 429            toggleFullScreen();
 430         }
 431         return true;
 432     }
 433
 434
 435     private void toggleFullScreen() {
 436         ActionBar actionBar = getSupportActionBar();
 437         if (mFullScreen) {
 438             actionBar.show();
 439
 440         } else {
 441             actionBar.hide();
 442
 443         }
 444         mFullScreen = !mFullScreen;
 445     }
 446
 447
 448 }