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