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.os.Bundle;
  26 import android.os.IBinder;
  27 import android.support.v4.app.Fragment;
  28 import android.support.v4.app.FragmentManager;
  29 import android.support.v4.app.FragmentTransaction;
  30 import android.support.v4.view.ViewPager;
  31 import android.view.MotionEvent;
  32 import android.view.View;
  33 import android.view.View.OnTouchListener;
  34
  35 import com.actionbarsherlock.app.ActionBar;
  36 import com.actionbarsherlock.view.MenuItem;
  37 import com.actionbarsherlock.view.Window;
  38 import com.owncloud.android.authentication.AccountUtils;
  39 import com.owncloud.android.datamodel.DataStorageManager;
  40 import com.owncloud.android.datamodel.FileDataStorageManager;
  41 import com.owncloud.android.datamodel.OCFile;
  42 import com.owncloud.android.files.services.FileDownloader;
  43 import com.owncloud.android.files.services.FileDownloader.FileDownloaderBinder;
  44 import com.owncloud.android.files.services.FileUploader;
  45 import com.owncloud.android.files.services.FileUploader.FileUploaderBinder;
  46 import com.owncloud.android.ui.activity.FileActivity;
  47 import com.owncloud.android.ui.activity.FileDisplayActivity;
  48 import com.owncloud.android.ui.dialog.LoadingDialog;
  49 import com.owncloud.android.ui.fragment.FileFragment;
  50
  51 import com.owncloud.android.Log_OC;
  52 import com.owncloud.android.R;
  53
  54 /**
  55  *  Holds a swiping galley where image files contained in an ownCloud directory are shown
  56  *
  57  *  @author David A. Velasco
  58  */
  59 public class PreviewImageActivity extends FileActivity implements FileFragment.ContainerActivity, ViewPager.OnPageChangeListener, OnTouchListener {
  60
  61     public static final int DIALOG_SHORT_WAIT = 0;
  62
  63     public static final String TAG = PreviewImageActivity.class.getSimpleName();
  64
  65     public static final String KEY_WAITING_TO_PREVIEW = "WAITING_TO_PREVIEW";
  66     private static final String KEY_WAITING_FOR_BINDER = "WAITING_FOR_BINDER";
  67
  68     private static final String DIALOG_WAIT_TAG = "DIALOG_WAIT";
  69
  70     private DataStorageManager mStorageManager;
  71
  72     private ViewPager mViewPager;
  73     private PreviewImagePagerAdapter mPreviewImagePagerAdapter;
  74
  75     private FileDownloaderBinder mDownloaderBinder = null;
  76     private ServiceConnection mDownloadConnection, mUploadConnection = null;
  77     private FileUploaderBinder mUploaderBinder = null;
  78
  79     private boolean mRequestWaitingForBinder;
  80
  81     private DownloadFinishReceiver mDownloadFinishReceiver;
  82
  83     private boolean mFullScreen;
  84
  85
  86     @Override
  87     protected void onCreate(Bundle savedInstanceState) {
  88         super.onCreate(savedInstanceState);
  89
  90         requestWindowFeature(Window.FEATURE_ACTION_BAR_OVERLAY);
  91         setContentView(R.layout.preview_image_activity);
  92
  93         ActionBar actionBar = getSupportActionBar();
  94         actionBar.setDisplayHomeAsUpEnabled(true);
  95         actionBar.hide();
  96
  97         mFullScreen = true;
  98         if (savedInstanceState != null) {
  99             mRequestWaitingForBinder = savedInstanceState.getBoolean(KEY_WAITING_FOR_BINDER);
 100         } else {
 101             mRequestWaitingForBinder = false;
 102         }
 103
 104     }
 105
 106     private void initViewPager() {
 107         // get parent from path
 108         String parentPath = getFile().getRemotePath().substring(0, getFile().getRemotePath().lastIndexOf(getFile().getFileName()));
 109         OCFile parentFolder = mStorageManager.getFileByPath(parentPath);
 110         //OCFile parentFolder = mStorageManager.getFileById(getFile().getParentId());
 111         if (parentFolder == null) {
 112             // should not be necessary
 113             parentFolder = mStorageManager.getFileByPath(OCFile.PATH_SEPARATOR);
 114         }
 115         mPreviewImagePagerAdapter = new PreviewImagePagerAdapter(getSupportFragmentManager(), parentFolder, getAccount(), mStorageManager);
 116         mViewPager = (ViewPager) findViewById(R.id.fragmentPager);
 117         int position = mPreviewImagePagerAdapter.getFilePosition(getFile());
 118         position = (position >= 0) ? position : 0;
 119         mViewPager.setAdapter(mPreviewImagePagerAdapter);
 120         mViewPager.setOnPageChangeListener(this);
 121         mViewPager.setCurrentItem(position);
 122         if (position == 0 && !getFile().isDown()) {
 123             // this is necessary because mViewPager.setCurrentItem(0) just after setting the adapter does not result in a call to #onPageSelected(0)
 124             mRequestWaitingForBinder = true;
 125         }
 126     }
 127
 128
 129     @Override
 130     public void onStart() {
 131         super.onStart();
 132         mDownloadConnection = new PreviewImageServiceConnection();
 133         bindService(new Intent(this, FileDownloader.class), mDownloadConnection, Context.BIND_AUTO_CREATE);
 134         mUploadConnection = new PreviewImageServiceConnection();
 135         bindService(new Intent(this, FileUploader.class), mUploadConnection, Context.BIND_AUTO_CREATE);
 136     }
 137
 138     @Override
 139     protected void onSaveInstanceState(Bundle outState) {
 140         super.onSaveInstanceState(outState);
 141         outState.putBoolean(KEY_WAITING_FOR_BINDER, mRequestWaitingForBinder);
 142     }
 143
 144
 145     /** Defines callbacks for service binding, passed to bindService() */
 146     private class PreviewImageServiceConnection implements ServiceConnection {
 147
 148         @Override
 149         public void onServiceConnected(ComponentName component, IBinder service) {
 150
 151             if (component.equals(new ComponentName(PreviewImageActivity.this, FileDownloader.class))) {
 152                 mDownloaderBinder = (FileDownloaderBinder) service;
 153                 if (mRequestWaitingForBinder) {
 154                     mRequestWaitingForBinder = false;
 155                     Log_OC.d(TAG, "Simulating reselection of current page after connection of download binder");
 156                     onPageSelected(mViewPager.getCurrentItem());
 157                 }
 158
 159             } else if (component.equals(new ComponentName(PreviewImageActivity.this, FileUploader.class))) {
 160                 Log_OC.d(TAG, "Upload service connected");
 161                 mUploaderBinder = (FileUploaderBinder) service;
 162             } else {
 163                 return;
 164             }
 165
 166         }
 167
 168         @Override
 169         public void onServiceDisconnected(ComponentName component) {
 170             if (component.equals(new ComponentName(PreviewImageActivity.this, FileDownloader.class))) {
 171                 Log_OC.d(TAG, "Download service suddenly disconnected");
 172                 mDownloaderBinder = null;
 173             } else if (component.equals(new ComponentName(PreviewImageActivity.this, FileUploader.class))) {
 174                 Log_OC.d(TAG, "Upload service suddenly disconnected");
 175                 mUploaderBinder = null;
 176             }
 177         }
 178     };
 179
 180
 181     @Override
 182     public void onStop() {
 183         super.onStop();
 184         if (mDownloadConnection != null) {
 185             unbindService(mDownloadConnection);
 186             mDownloadConnection = null;
 187         }
 188         if (mUploadConnection != null) {
 189             unbindService(mUploadConnection);
 190             mUploadConnection = null;
 191         }
 192     }
 193
 194
 195     @Override
 196     public void onDestroy() {
 197         super.onDestroy();
 198     }
 199
 200
 201     @Override
 202     public boolean onOptionsItemSelected(MenuItem item) {
 203         boolean returnValue = false;
 204
 205         switch(item.getItemId()){
 206         case android.R.id.home:
 207             backToDisplayActivity();
 208             returnValue = true;
 209             break;
 210         default:
 211                 returnValue = super.onOptionsItemSelected(item);
 212         }
 213
 214         return returnValue;
 215     }
 216
 217
 218     @Override
 219     protected void onResume() {
 220         super.onResume();
 221         //Log.e(TAG, "ACTIVITY, ONRESUME");
 222         mDownloadFinishReceiver = new DownloadFinishReceiver();
 223
 224         IntentFilter filter = new IntentFilter(FileDownloader.getDownloadFinishMessage());
 225         filter.addAction(FileDownloader.getDownloadAddedMessage());
 226         registerReceiver(mDownloadFinishReceiver, filter);
 227     }
 228
 229     @Override
 230     protected void onPostResume() {
 231         //Log.e(TAG, "ACTIVITY, ONPOSTRESUME");
 232         super.onPostResume();
 233     }
 234
 235     @Override
 236     public void onPause() {
 237         super.onPause();
 238         unregisterReceiver(mDownloadFinishReceiver);
 239         mDownloadFinishReceiver = null;
 240     }
 241
 242
 243     private void backToDisplayActivity() {
 244         finish();
 245     }
 246
 247     /**
 248      * Show loading dialog
 249      */
 250     public void showLoadingDialog() {
 251         // Construct dialog
 252         LoadingDialog loading = new LoadingDialog(getResources().getString(R.string.wait_a_moment));
 253         FragmentManager fm = getSupportFragmentManager();
 254         FragmentTransaction ft = fm.beginTransaction();
 255         loading.show(ft, DIALOG_WAIT_TAG);
 256
 257     }
 258
 259     /**
 260      * Dismiss loading dialog
 261      */
 262     public void dismissLoadingDialog(){
 263         Fragment frag = getSupportFragmentManager().findFragmentByTag(DIALOG_WAIT_TAG);
 264       if (frag != null) {
 265           LoadingDialog loading = (LoadingDialog) frag;
 266             loading.dismiss();
 267         }
 268     }
 269
 270     /**
 271      * {@inheritDoc}
 272      */
 273     @Override
 274     public void onFileStateChanged() {
 275         // nothing to do here!
 276     }
 277
 278
 279     /**
 280      * {@inheritDoc}
 281      */
 282     @Override
 283     public FileDownloaderBinder getFileDownloaderBinder() {
 284         return mDownloaderBinder;
 285     }
 286
 287
 288     @Override
 289     public FileUploaderBinder getFileUploaderBinder() {
 290         return mUploaderBinder;
 291     }
 292
 293
 294     @Override
 295     public void showDetails(OCFile file) {
 296         Intent showDetailsIntent = new Intent(this, FileDisplayActivity.class);
 297         showDetailsIntent.setAction(FileDisplayActivity.ACTION_DETAILS);
 298         showDetailsIntent.putExtra(FileActivity.EXTRA_FILE, file);
 299         showDetailsIntent.putExtra(FileActivity.EXTRA_ACCOUNT, AccountUtils.getCurrentOwnCloudAccount(this));
 300         startActivity(showDetailsIntent);
 301         int pos = mPreviewImagePagerAdapter.getFilePosition(file);
 302         file = mPreviewImagePagerAdapter.getFileAt(pos);
 303
 304     }
 305
 306
 307     private void requestForDownload(OCFile file) {
 308         if (mDownloaderBinder == null) {
 309             Log_OC.d(TAG, "requestForDownload called without binder to download service");
 310
 311         } else if (!mDownloaderBinder.isDownloading(getAccount(), file)) {
 312             Intent i = new Intent(this, FileDownloader.class);
 313             i.putExtra(FileDownloader.EXTRA_ACCOUNT, getAccount());
 314             i.putExtra(FileDownloader.EXTRA_FILE, file);
 315             startService(i);
 316         }
 317     }
 318
 319     /**
 320      * This method will be invoked when a new page becomes selected. Animation is not necessarily complete.
 321      *
 322      *  @param  Position        Position index of the new selected page
 323      */
 324     @Override
 325     public void onPageSelected(int position) {
 326         if (mDownloaderBinder == null) {
 327             mRequestWaitingForBinder = true;
 328
 329         } else {
 330             OCFile currentFile = mPreviewImagePagerAdapter.getFileAt(position);
 331             getSupportActionBar().setTitle(currentFile.getFileName());
 332             if (!currentFile.isDown()) {
 333                 if (!mPreviewImagePagerAdapter.pendingErrorAt(position)) {
 334                     requestForDownload(currentFile);
 335                 }
 336             }
 337         }
 338     }
 339
 340     /**
 341      * Called when the scroll state changes. Useful for discovering when the user begins dragging,
 342      * when the pager is automatically settling to the current page. when it is fully stopped/idle.
 343      *
 344      * @param   State       The new scroll state (SCROLL_STATE_IDLE, _DRAGGING, _SETTLING
 345      */
 346     @Override
 347     public void onPageScrollStateChanged(int state) {
 348     }
 349
 350     /**
 351      * This method will be invoked when the current page is scrolled, either as part of a programmatically
 352      * initiated smooth scroll or a user initiated touch scroll.
 353      *
 354      * @param   position                Position index of the first page currently being displayed.
 355      *                                  Page position+1 will be visible if positionOffset is nonzero.
 356      *
 357      * @param   positionOffset          Value from [0, 1) indicating the offset from the page at position.
 358      * @param   positionOffsetPixels    Value in pixels indicating the offset from position.
 359      */
 360     @Override
 361     public void onPageScrolled(int position, float positionOffset, int positionOffsetPixels) {
 362     }
 363
 364
 365     /**
 366      * Class waiting for broadcast events from the {@link FielDownloader} service.
 367      *
 368      * Updates the UI when a download is started or finished, provided that it is relevant for the
 369      * folder displayed in the gallery.
 370      */
 371     private class DownloadFinishReceiver extends BroadcastReceiver {
 372         @Override
 373         public void onReceive(Context context, Intent intent) {
 374             String accountName = intent.getStringExtra(FileDownloader.ACCOUNT_NAME);
 375             String downloadedRemotePath = intent.getStringExtra(FileDownloader.EXTRA_REMOTE_PATH);
 376             if (getAccount().name.equals(accountName) &&
 377                     downloadedRemotePath != null) {
 378
 379                 OCFile file = mStorageManager.getFileByPath(downloadedRemotePath);
 380                 int position = mPreviewImagePagerAdapter.getFilePosition(file);
 381                 boolean downloadWasFine = intent.getBooleanExtra(FileDownloader.EXTRA_DOWNLOAD_RESULT, false);
 382                 //boolean isOffscreen =  Math.abs((mViewPager.getCurrentItem() - position)) <= mViewPager.getOffscreenPageLimit();
 383
 384                 if (position >= 0 && intent.getAction().equals(FileDownloader.getDownloadFinishMessage())) {
 385                     if (downloadWasFine) {
 386                         mPreviewImagePagerAdapter.updateFile(position, file);
 387
 388                     } else {
 389                         mPreviewImagePagerAdapter.updateWithDownloadError(position);
 390                     }
 391                     mPreviewImagePagerAdapter.notifyDataSetChanged();   // will trigger the creation of new fragments
 392
 393                 } else {
 394                     Log_OC.d(TAG, "Download finished, but the fragment is offscreen");
 395                 }
 396
 397             }
 398             removeStickyBroadcast(intent);
 399         }
 400
 401     }
 402
 403
 404     @Override
 405     public boolean onTouch(View v, MotionEvent event) {
 406         if (event.getAction() == MotionEvent.ACTION_UP) {
 407            toggleFullScreen();
 408         }
 409         return true;
 410     }
 411
 412
 413     private void toggleFullScreen() {
 414         ActionBar actionBar = getSupportActionBar();
 415         if (mFullScreen) {
 416             actionBar.show();
 417
 418         } else {
 419             actionBar.hide();
 420
 421         }
 422         mFullScreen = !mFullScreen;
 423     }
 424
 425     @Override
 426     protected void onAccountSet(boolean stateWasRecovered) {
 427         if (getAccount() != null) {
 428             OCFile file = getFile();
 429             /// Validate handled file  (first image to preview)
 430             if (file == null) {
 431                 throw new IllegalStateException("Instanced with a NULL OCFile");
 432             }
 433             if (!file.isImage()) {
 434                 throw new IllegalArgumentException("Non-image file passed as argument");
 435             }
 436             mStorageManager = new FileDataStorageManager(getAccount(), getContentResolver());
 437
 438             // Update file according to DB file, if it is possible
 439             if (file.getFileId() > DataStorageManager.ROOT_PARENT_ID)
 440                 file = mStorageManager.getFileById(file.getFileId());
 441
 442             if (file != null) {
 443                 /// Refresh the activity according to the Account and OCFile set
 444                 setFile(file);  // reset after getting it fresh from mStorageManager
 445                 getSupportActionBar().setTitle(getFile().getFileName());
 446                 //if (!stateWasRecovered) {
 447                     initViewPager();
 448                 //}
 449
 450             } else {
 451                 // handled file not in the current Account
 452                 finish();
 453             }
 454
 455         } else {
 456             Log_OC.wtf(TAG, "onAccountChanged was called with NULL account associated!");
 457         }
 458     }
 459
 460
 461 }