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