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.media.MediaScannerConnection;
  26 import android.media.MediaScannerConnection.OnScanCompletedListener;
  27 import android.net.Uri;
  28 import android.os.Bundle;
  29 import android.os.IBinder;
  30 import android.support.v4.app.Fragment;
  31 import android.support.v4.app.FragmentManager;
  32 import android.support.v4.app.FragmentTransaction;
  33 import android.support.v4.view.ViewPager;
  34 import android.view.MotionEvent;
  35 import android.view.View;
  36 import android.view.View.OnTouchListener;
  37
  38 import com.actionbarsherlock.app.ActionBar;
  39 import com.actionbarsherlock.view.MenuItem;
  40 import com.actionbarsherlock.view.Window;
  41 import com.owncloud.android.Log_OC;
  42 import com.owncloud.android.R;
  43 import com.owncloud.android.authentication.AccountUtils;
  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.FileUploader;
  48 import com.owncloud.android.files.services.FileDownloader.FileDownloaderBinder;
  49 import com.owncloud.android.files.services.FileUploader.FileUploaderBinder;
  50 import com.owncloud.android.ui.activity.FileActivity;
  51 import com.owncloud.android.ui.activity.FileDisplayActivity;
  52 import com.owncloud.android.ui.dialog.LoadingDialog;
  53 import com.owncloud.android.ui.fragment.FileFragment;
  54
  55
  56 /**
  57  *  Holds a swiping galley where image files contained in an ownCloud directory are shown
  58  *
  59  *  @author David A. Velasco
  60  */
  61 public class PreviewImageActivity extends FileActivity implements FileFragment.ContainerActivity, ViewPager.OnPageChangeListener, OnTouchListener {
  62
  63     public static final int DIALOG_SHORT_WAIT = 0;
  64
  65     public static final String TAG = PreviewImageActivity.class.getSimpleName();
  66
  67     public static final String KEY_WAITING_TO_PREVIEW = "WAITING_TO_PREVIEW";
  68     private static final String KEY_WAITING_FOR_BINDER = "WAITING_FOR_BINDER";
  69
  70     private static final String DIALOG_WAIT_TAG = "DIALOG_WAIT";
  71
  72     private FileDataStorageManager mStorageManager;
  73
  74     private ViewPager mViewPager;
  75     private PreviewImagePagerAdapter mPreviewImagePagerAdapter;
  76
  77     private FileDownloaderBinder mDownloaderBinder = null;
  78     private ServiceConnection mDownloadConnection, mUploadConnection = null;
  79     private FileUploaderBinder mUploaderBinder = null;
  80
  81     private boolean mRequestWaitingForBinder;
  82
  83     private DownloadFinishReceiver mDownloadFinishReceiver;
  84
  85     private boolean mFullScreen;
  86
  87
  88     @Override
  89     protected void onCreate(Bundle savedInstanceState) {
  90         super.onCreate(savedInstanceState);
  91
  92         requestWindowFeature(Window.FEATURE_ACTION_BAR_OVERLAY);
  93         setContentView(R.layout.preview_image_activity);
  94
  95         ActionBar actionBar = getSupportActionBar();
  96         actionBar.setDisplayHomeAsUpEnabled(true);
  97         actionBar.hide();
  98
  99         mFullScreen = true;
 100         if (savedInstanceState != null) {
 101             mRequestWaitingForBinder = savedInstanceState.getBoolean(KEY_WAITING_FOR_BINDER);
 102         } else {
 103             mRequestWaitingForBinder = false;
 104         }
 105
 106     }
 107
 108     private void initViewPager() {
 109         // get parent from path
 110         String parentPath = getFile().getRemotePath().substring(0, getFile().getRemotePath().lastIndexOf(getFile().getFileName()));
 111         OCFile parentFolder = mStorageManager.getFileByPath(parentPath);
 112         //OCFile parentFolder = mStorageManager.getFileById(getFile().getParentId());
 113         if (parentFolder == null) {
 114             // should not be necessary
 115             parentFolder = mStorageManager.getFileByPath(OCFile.ROOT_PATH);
 116         }
 117         mPreviewImagePagerAdapter = new PreviewImagePagerAdapter(getSupportFragmentManager(), parentFolder, getAccount(), mStorageManager);
 118         mViewPager = (ViewPager) findViewById(R.id.fragmentPager);
 119         int position = mPreviewImagePagerAdapter.getFilePosition(getFile());
 120         position = (position >= 0) ? position : 0;
 121         mViewPager.setAdapter(mPreviewImagePagerAdapter);
 122         mViewPager.setOnPageChangeListener(this);
 123         mViewPager.setCurrentItem(position);
 124         if (position == 0 && !getFile().isDown()) {
 125             // this is necessary because mViewPager.setCurrentItem(0) just after setting the adapter does not result in a call to #onPageSelected(0)
 126             mRequestWaitingForBinder = true;
 127         }
 128     }
 129
 130
 131     @Override
 132     public void onStart() {
 133         super.onStart();
 134         mDownloadConnection = new PreviewImageServiceConnection();
 135         bindService(new Intent(this, FileDownloader.class), mDownloadConnection, Context.BIND_AUTO_CREATE);
 136         mUploadConnection = new PreviewImageServiceConnection();
 137         bindService(new Intent(this, FileUploader.class), mUploadConnection, Context.BIND_AUTO_CREATE);
 138     }
 139
 140     @Override
 141     protected void onSaveInstanceState(Bundle outState) {
 142         super.onSaveInstanceState(outState);
 143         outState.putBoolean(KEY_WAITING_FOR_BINDER, mRequestWaitingForBinder);
 144     }
 145
 146
 147     /** Defines callbacks for service binding, passed to bindService() */
 148     private class PreviewImageServiceConnection implements ServiceConnection {
 149
 150         @Override
 151         public void onServiceConnected(ComponentName component, IBinder service) {
 152
 153             if (component.equals(new ComponentName(PreviewImageActivity.this, FileDownloader.class))) {
 154                 mDownloaderBinder = (FileDownloaderBinder) service;
 155                 if (mRequestWaitingForBinder) {
 156                     mRequestWaitingForBinder = false;
 157                     Log_OC.d(TAG, "Simulating reselection of current page after connection of download binder");
 158                     onPageSelected(mViewPager.getCurrentItem());
 159                 }
 160
 161             } else if (component.equals(new ComponentName(PreviewImageActivity.this, FileUploader.class))) {
 162                 Log_OC.d(TAG, "Upload service connected");
 163                 mUploaderBinder = (FileUploaderBinder) service;
 164             } else {
 165                 return;
 166             }
 167
 168         }
 169
 170         @Override
 171         public void onServiceDisconnected(ComponentName component) {
 172             if (component.equals(new ComponentName(PreviewImageActivity.this, FileDownloader.class))) {
 173                 Log_OC.d(TAG, "Download service suddenly disconnected");
 174                 mDownloaderBinder = null;
 175             } else if (component.equals(new ComponentName(PreviewImageActivity.this, FileUploader.class))) {
 176                 Log_OC.d(TAG, "Upload service suddenly disconnected");
 177                 mUploaderBinder = null;
 178             }
 179         }
 180     };
 181
 182
 183     @Override
 184     public void onStop() {
 185         super.onStop();
 186         if (mDownloadConnection != null) {
 187             unbindService(mDownloadConnection);
 188             mDownloadConnection = null;
 189         }
 190         if (mUploadConnection != null) {
 191             unbindService(mUploadConnection);
 192             mUploadConnection = null;
 193         }
 194     }
 195
 196
 197     @Override
 198     public void onDestroy() {
 199         super.onDestroy();
 200     }
 201
 202
 203     @Override
 204     public boolean onOptionsItemSelected(MenuItem item) {
 205         boolean returnValue = false;
 206
 207         switch(item.getItemId()){
 208         case android.R.id.home:
 209             backToDisplayActivity();
 210             returnValue = true;
 211             break;
 212         default:
 213                 returnValue = super.onOptionsItemSelected(item);
 214         }
 215
 216         return returnValue;
 217     }
 218
 219
 220     @Override
 221     protected void onResume() {
 222         super.onResume();
 223         //Log.e(TAG, "ACTIVITY, ONRESUME");
 224         mDownloadFinishReceiver = new DownloadFinishReceiver();
 225
 226         IntentFilter filter = new IntentFilter(FileDownloader.getDownloadFinishMessage());
 227         filter.addAction(FileDownloader.getDownloadAddedMessage());
 228         registerReceiver(mDownloadFinishReceiver, filter);
 229     }
 230
 231     @Override
 232     protected void onPostResume() {
 233         //Log.e(TAG, "ACTIVITY, ONPOSTRESUME");
 234         super.onPostResume();
 235     }
 236
 237     @Override
 238     public void onPause() {
 239         super.onPause();
 240         unregisterReceiver(mDownloadFinishReceiver);
 241         mDownloadFinishReceiver = null;
 242     }
 243
 244
 245     private void backToDisplayActivity() {
 246         finish();
 247     }
 248
 249     /**
 250      * Show loading dialog
 251      */
 252     public void showLoadingDialog() {
 253         // Construct dialog
 254         LoadingDialog loading = new LoadingDialog(getResources().getString(R.string.wait_a_moment));
 255         FragmentManager fm = getSupportFragmentManager();
 256         FragmentTransaction ft = fm.beginTransaction();
 257         loading.show(ft, DIALOG_WAIT_TAG);
 258
 259     }
 260
 261     /**
 262      * Dismiss loading dialog
 263      */
 264     public void dismissLoadingDialog(){
 265         Fragment frag = getSupportFragmentManager().findFragmentByTag(DIALOG_WAIT_TAG);
 266       if (frag != null) {
 267           LoadingDialog loading = (LoadingDialog) frag;
 268             loading.dismiss();
 269         }
 270     }
 271
 272     /**
 273      * {@inheritDoc}
 274      */
 275     @Override
 276     public void onFileStateChanged() {
 277         // nothing to do here!
 278     }
 279
 280
 281     /**
 282      * {@inheritDoc}
 283      */
 284     @Override
 285     public FileDownloaderBinder getFileDownloaderBinder() {
 286         return mDownloaderBinder;
 287     }
 288
 289
 290     @Override
 291     public FileUploaderBinder getFileUploaderBinder() {
 292         return mUploaderBinder;
 293     }
 294
 295
 296     @Override
 297     public void showDetails(OCFile file) {
 298         Intent showDetailsIntent = new Intent(this, FileDisplayActivity.class);
 299         showDetailsIntent.setAction(FileDisplayActivity.ACTION_DETAILS);
 300         showDetailsIntent.putExtra(FileActivity.EXTRA_FILE, file);
 301         showDetailsIntent.putExtra(FileActivity.EXTRA_ACCOUNT, AccountUtils.getCurrentOwnCloudAccount(this));
 302         startActivity(showDetailsIntent);
 303         int pos = mPreviewImagePagerAdapter.getFilePosition(file);
 304         file = mPreviewImagePagerAdapter.getFileAt(pos);
 305
 306     }
 307
 308
 309     private void requestForDownload(OCFile file) {
 310         if (mDownloaderBinder == null) {
 311             Log_OC.d(TAG, "requestForDownload called without binder to download service");
 312
 313         } else if (!mDownloaderBinder.isDownloading(getAccount(), file)) {
 314             Intent i = new Intent(this, FileDownloader.class);
 315             i.putExtra(FileDownloader.EXTRA_ACCOUNT, getAccount());
 316             i.putExtra(FileDownloader.EXTRA_FILE, file);
 317             startService(i);
 318         }
 319     }
 320
 321     /**
 322      * This method will be invoked when a new page becomes selected. Animation is not necessarily complete.
 323      *
 324      *  @param  Position        Position index of the new selected page
 325      */
 326     @Override
 327     public void onPageSelected(int position) {
 328         if (mDownloaderBinder == null) {
 329             mRequestWaitingForBinder = true;
 330
 331         } else {
 332             OCFile currentFile = mPreviewImagePagerAdapter.getFileAt(position);
 333             getSupportActionBar().setTitle(currentFile.getFileName());
 334             if (!currentFile.isDown()) {
 335                 if (!mPreviewImagePagerAdapter.pendingErrorAt(position)) {
 336                     requestForDownload(currentFile);
 337                 }
 338             }
 339         }
 340     }
 341
 342     /**
 343      * Called when the scroll state changes. Useful for discovering when the user begins dragging,
 344      * when the pager is automatically settling to the current page. when it is fully stopped/idle.
 345      *
 346      * @param   State       The new scroll state (SCROLL_STATE_IDLE, _DRAGGING, _SETTLING
 347      */
 348     @Override
 349     public void onPageScrollStateChanged(int state) {
 350     }
 351
 352     /**
 353      * This method will be invoked when the current page is scrolled, either as part of a programmatically
 354      * initiated smooth scroll or a user initiated touch scroll.
 355      *
 356      * @param   position                Position index of the first page currently being displayed.
 357      *                                  Page position+1 will be visible if positionOffset is nonzero.
 358      *
 359      * @param   positionOffset          Value from [0, 1) indicating the offset from the page at position.
 360      * @param   positionOffsetPixels    Value in pixels indicating the offset from position.
 361      */
 362     @Override
 363     public void onPageScrolled(int position, float positionOffset, int positionOffsetPixels) {
 364     }
 365
 366
 367     /**
 368      * Class waiting for broadcast events from the {@link FielDownloader} service.
 369      *
 370      * Updates the UI when a download is started or finished, provided that it is relevant for the
 371      * folder displayed in the gallery.
 372      */
 373     private class DownloadFinishReceiver extends BroadcastReceiver {
 374         @Override
 375         public void onReceive(Context context, Intent intent) {
 376             String accountName = intent.getStringExtra(FileDownloader.ACCOUNT_NAME);
 377             String downloadedRemotePath = intent.getStringExtra(FileDownloader.EXTRA_REMOTE_PATH);
 378
 379
 380
 381             if (getAccount().name.equals(accountName) &&
 382                     downloadedRemotePath != null) {
 383
 384                 final OCFile file = mStorageManager.getFileByPath(downloadedRemotePath);
 385                 int position = mPreviewImagePagerAdapter.getFilePosition(file);
 386                 boolean downloadWasFine = intent.getBooleanExtra(FileDownloader.EXTRA_DOWNLOAD_RESULT, false);
 387                 //boolean isOffscreen =  Math.abs((mViewPager.getCurrentItem() - position)) <= mViewPager.getOffscreenPageLimit();
 388
 389                 if (downloadWasFine){
 390                  // Trigger Mediascan
 391                     MediaScannerConnection.scanFile(
 392                             context,
 393                             new String[]{file.getStoragePath()},
 394                             null,null);
 395                 }
 396
 397                 if (position >= 0 && intent.getAction().equals(FileDownloader.getDownloadFinishMessage())) {
 398                     if (downloadWasFine) {
 399                         mPreviewImagePagerAdapter.updateFile(position, file);
 400
 401                     } else {
 402                         mPreviewImagePagerAdapter.updateWithDownloadError(position);
 403                     }
 404                     mPreviewImagePagerAdapter.notifyDataSetChanged();   // will trigger the creation of new fragments
 405
 406                 } else {
 407                     Log_OC.d(TAG, "Download finished, but the fragment is offscreen");
 408                 }
 409
 410             }
 411             removeStickyBroadcast(intent);
 412         }
 413
 414     }
 415
 416
 417     @Override
 418     public boolean onTouch(View v, MotionEvent event) {
 419         if (event.getAction() == MotionEvent.ACTION_UP) {
 420            toggleFullScreen();
 421         }
 422         return true;
 423     }
 424
 425
 426     private void toggleFullScreen() {
 427         ActionBar actionBar = getSupportActionBar();
 428         if (mFullScreen) {
 429             actionBar.show();
 430
 431         } else {
 432             actionBar.hide();
 433
 434         }
 435         mFullScreen = !mFullScreen;
 436     }
 437
 438     @Override
 439     protected void onAccountSet(boolean stateWasRecovered) {
 440         if (getAccount() != null) {
 441             OCFile file = getFile();
 442             /// Validate handled file  (first image to preview)
 443             if (file == null) {
 444                 throw new IllegalStateException("Instanced with a NULL OCFile");
 445             }
 446             if (!file.isImage()) {
 447                 throw new IllegalArgumentException("Non-image file passed as argument");
 448             }
 449             mStorageManager = new FileDataStorageManager(getAccount(), getContentResolver());
 450
 451             // Update file according to DB file, if it is possible
 452             if (file.getFileId() > FileDataStorageManager.ROOT_PARENT_ID)
 453                 file = mStorageManager.getFileById(file.getFileId());
 454
 455             if (file != null) {
 456                 /// Refresh the activity according to the Account and OCFile set
 457                 setFile(file);  // reset after getting it fresh from mStorageManager
 458                 getSupportActionBar().setTitle(getFile().getFileName());
 459                 //if (!stateWasRecovered) {
 460                     initViewPager();
 461                 //}
 462
 463             } else {
 464                 // handled file not in the current Account
 465                 finish();
 466             }
 467
 468         } else {
 469             Log_OC.wtf(TAG, "onAccountChanged was called with NULL account associated!");
 470         }
 471     }
 472
 473
 474 }