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