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.Log_OC;
  39 import com.owncloud.android.R;
  40 import com.owncloud.android.authentication.AccountUtils;
  41 import com.owncloud.android.datamodel.FileDataStorageManager;
  42 import com.owncloud.android.datamodel.OCFile;
  43 import com.owncloud.android.files.services.FileDownloader;
  44 import com.owncloud.android.files.services.FileUploader;
  45 import com.owncloud.android.files.services.FileDownloader.FileDownloaderBinder;
  46 import com.owncloud.android.files.services.FileUploader.FileUploaderBinder;
  47 import com.owncloud.android.ui.activity.FileActivity;
  48 import com.owncloud.android.ui.activity.FileDisplayActivity;
  49 import com.owncloud.android.ui.dialog.LoadingDialog;
  50 import com.owncloud.android.ui.fragment.FileFragment;
  51
  52
  53 /**
  54  *  Holds a swiping galley where image files contained in an ownCloud directory are shown
  55  *
  56  *  @author David A. Velasco
  57  */
  58 public class PreviewImageActivity extends FileActivity implements FileFragment.ContainerActivity, ViewPager.OnPageChangeListener, OnTouchListener {
  59
  60     public static final int DIALOG_SHORT_WAIT = 0;
  61
  62     public static final String TAG = PreviewImageActivity.class.getSimpleName();
  63
  64     public static final String KEY_WAITING_TO_PREVIEW = "WAITING_TO_PREVIEW";
  65     private static final String KEY_WAITING_FOR_BINDER = "WAITING_FOR_BINDER";
  66
  67     private static final String DIALOG_WAIT_TAG = "DIALOG_WAIT";
  68
  69     private FileDataStorageManager mStorageManager;
  70
  71     private ViewPager mViewPager;
  72     private PreviewImagePagerAdapter mPreviewImagePagerAdapter;
  73
  74     private FileDownloaderBinder mDownloaderBinder = null;
  75     private ServiceConnection mDownloadConnection, mUploadConnection = null;
  76     private FileUploaderBinder mUploaderBinder = null;
  77
  78     private boolean mRequestWaitingForBinder;
  79
  80     private DownloadFinishReceiver mDownloadFinishReceiver;
  81
  82     private boolean mFullScreen;
  83
  84
  85     @Override
  86     protected void onCreate(Bundle savedInstanceState) {
  87         super.onCreate(savedInstanceState);
  88
  89         requestWindowFeature(Window.FEATURE_ACTION_BAR_OVERLAY);
  90         setContentView(R.layout.preview_image_activity);
  91
  92         ActionBar actionBar = getSupportActionBar();
  93         actionBar.setDisplayHomeAsUpEnabled(true);
  94         actionBar.hide();
  95
  96         mFullScreen = true;
  97         if (savedInstanceState != null) {
  98             mRequestWaitingForBinder = savedInstanceState.getBoolean(KEY_WAITING_FOR_BINDER);
  99         } else {
 100             mRequestWaitingForBinder = false;
 101         }
 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.ROOT_PATH);
 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
 223         IntentFilter filter = new IntentFilter(FileDownloader.getDownloadFinishMessage());
 224         filter.addAction(FileDownloader.getDownloadAddedMessage());
 225         registerReceiver(mDownloadFinishReceiver, filter);
 226     }
 227
 228     @Override
 229     protected void onPostResume() {
 230         //Log.e(TAG, "ACTIVITY, ONPOSTRESUME");
 231         super.onPostResume();
 232     }
 233
 234     @Override
 235     public void onPause() {
 236         super.onPause();
 237         unregisterReceiver(mDownloadFinishReceiver);
 238         mDownloadFinishReceiver = null;
 239     }
 240
 241
 242     private void backToDisplayActivity() {
 243         finish();
 244     }
 245
 246     /**
 247      * Show loading dialog
 248      */
 249     public void showLoadingDialog() {
 250         // Construct dialog
 251         LoadingDialog loading = new LoadingDialog(getResources().getString(R.string.wait_a_moment));
 252         FragmentManager fm = getSupportFragmentManager();
 253         FragmentTransaction ft = fm.beginTransaction();
 254         loading.show(ft, DIALOG_WAIT_TAG);
 255
 256     }
 257
 258     /**
 259      * Dismiss loading dialog
 260      */
 261     public void dismissLoadingDialog(){
 262         Fragment frag = getSupportFragmentManager().findFragmentByTag(DIALOG_WAIT_TAG);
 263       if (frag != null) {
 264           LoadingDialog loading = (LoadingDialog) frag;
 265             loading.dismiss();
 266         }
 267     }
 268
 269     /**
 270      * {@inheritDoc}
 271      */
 272     @Override
 273     public void onFileStateChanged() {
 274         // nothing to do here!
 275     }
 276
 277
 278     /**
 279      * {@inheritDoc}
 280      */
 281     @Override
 282     public FileDownloaderBinder getFileDownloaderBinder() {
 283         return mDownloaderBinder;
 284     }
 285
 286
 287     @Override
 288     public FileUploaderBinder getFileUploaderBinder() {
 289         return mUploaderBinder;
 290     }
 291
 292
 293     @Override
 294     public void showDetails(OCFile file) {
 295         Intent showDetailsIntent = new Intent(this, FileDisplayActivity.class);
 296         showDetailsIntent.setAction(FileDisplayActivity.ACTION_DETAILS);
 297         showDetailsIntent.putExtra(FileActivity.EXTRA_FILE, file);
 298         showDetailsIntent.putExtra(FileActivity.EXTRA_ACCOUNT, AccountUtils.getCurrentOwnCloudAccount(this));
 299         startActivity(showDetailsIntent);
 300         int pos = mPreviewImagePagerAdapter.getFilePosition(file);
 301         file = mPreviewImagePagerAdapter.getFileAt(pos);
 302
 303     }
 304
 305
 306     private void requestForDownload(OCFile file) {
 307         if (mDownloaderBinder == null) {
 308             Log_OC.d(TAG, "requestForDownload called without binder to download service");
 309
 310         } else if (!mDownloaderBinder.isDownloading(getAccount(), file)) {
 311             Intent i = new Intent(this, FileDownloader.class);
 312             i.putExtra(FileDownloader.EXTRA_ACCOUNT, getAccount());
 313             i.putExtra(FileDownloader.EXTRA_FILE, file);
 314             startService(i);
 315         }
 316     }
 317
 318     /**
 319      * This method will be invoked when a new page becomes selected. Animation is not necessarily complete.
 320      *
 321      *  @param  Position        Position index of the new selected page
 322      */
 323     @Override
 324     public void onPageSelected(int position) {
 325         if (mDownloaderBinder == null) {
 326             mRequestWaitingForBinder = true;
 327
 328         } else {
 329             OCFile currentFile = mPreviewImagePagerAdapter.getFileAt(position);
 330             getSupportActionBar().setTitle(currentFile.getFileName());
 331             if (!currentFile.isDown()) {
 332                 if (!mPreviewImagePagerAdapter.pendingErrorAt(position)) {
 333                     requestForDownload(currentFile);
 334                 }
 335             }
 336         }
 337     }
 338
 339     /**
 340      * Called when the scroll state changes. Useful for discovering when the user begins dragging,
 341      * when the pager is automatically settling to the current page. when it is fully stopped/idle.
 342      *
 343      * @param   State       The new scroll state (SCROLL_STATE_IDLE, _DRAGGING, _SETTLING
 344      */
 345     @Override
 346     public void onPageScrollStateChanged(int state) {
 347     }
 348
 349     /**
 350      * This method will be invoked when the current page is scrolled, either as part of a programmatically
 351      * initiated smooth scroll or a user initiated touch scroll.
 352      *
 353      * @param   position                Position index of the first page currently being displayed.
 354      *                                  Page position+1 will be visible if positionOffset is nonzero.
 355      *
 356      * @param   positionOffset          Value from [0, 1) indicating the offset from the page at position.
 357      * @param   positionOffsetPixels    Value in pixels indicating the offset from position.
 358      */
 359     @Override
 360     public void onPageScrolled(int position, float positionOffset, int positionOffsetPixels) {
 361     }
 362
 363
 364     /**
 365      * Class waiting for broadcast events from the {@link FielDownloader} service.
 366      *
 367      * Updates the UI when a download is started or finished, provided that it is relevant for the
 368      * folder displayed in the gallery.
 369      */
 370     private class DownloadFinishReceiver extends BroadcastReceiver {
 371         @Override
 372         public void onReceive(Context context, Intent intent) {
 373             String accountName = intent.getStringExtra(FileDownloader.ACCOUNT_NAME);
 374             String downloadedRemotePath = intent.getStringExtra(FileDownloader.EXTRA_REMOTE_PATH);
 375             if (getAccount().name.equals(accountName) &&
 376                     downloadedRemotePath != null) {
 377
 378                 OCFile file = mStorageManager.getFileByPath(downloadedRemotePath);
 379                 int position = mPreviewImagePagerAdapter.getFilePosition(file);
 380                 boolean downloadWasFine = intent.getBooleanExtra(FileDownloader.EXTRA_DOWNLOAD_RESULT, false);
 381                 //boolean isOffscreen =  Math.abs((mViewPager.getCurrentItem() - position)) <= mViewPager.getOffscreenPageLimit();
 382
 383                 if (position >= 0 && intent.getAction().equals(FileDownloader.getDownloadFinishMessage())) {
 384                     if (downloadWasFine) {
 385                         mPreviewImagePagerAdapter.updateFile(position, file);
 386
 387                     } else {
 388                         mPreviewImagePagerAdapter.updateWithDownloadError(position);
 389                     }
 390                     mPreviewImagePagerAdapter.notifyDataSetChanged();   // will trigger the creation of new fragments
 391
 392                 } else {
 393                     Log_OC.d(TAG, "Download finished, but the fragment is offscreen");
 394                 }
 395
 396             }
 397             removeStickyBroadcast(intent);
 398         }
 399
 400     }
 401
 402
 403     @Override
 404     public boolean onTouch(View v, MotionEvent event) {
 405         if (event.getAction() == MotionEvent.ACTION_UP) {
 406            toggleFullScreen();
 407         }
 408         return true;
 409     }
 410
 411
 412     private void toggleFullScreen() {
 413         ActionBar actionBar = getSupportActionBar();
 414         if (mFullScreen) {
 415             actionBar.show();
 416
 417         } else {
 418             actionBar.hide();
 419
 420         }
 421         mFullScreen = !mFullScreen;
 422     }
 423
 424     @Override
 425     protected void onAccountSet(boolean stateWasRecovered) {
 426         if (getAccount() != null) {
 427             OCFile file = getFile();
 428             /// Validate handled file  (first image to preview)
 429             if (file == null) {
 430                 throw new IllegalStateException("Instanced with a NULL OCFile");
 431             }
 432             if (!file.isImage()) {
 433                 throw new IllegalArgumentException("Non-image file passed as argument");
 434             }
 435             mStorageManager = new FileDataStorageManager(getAccount(), getContentResolver());
 436
 437             // Update file according to DB file, if it is possible
 438             if (file.getFileId() > FileDataStorageManager.ROOT_PARENT_ID)
 439                 file = mStorageManager.getFileById(file.getFileId());
 440
 441             if (file != null) {
 442                 /// Refresh the activity according to the Account and OCFile set
 443                 setFile(file);  // reset after getting it fresh from mStorageManager
 444                 getSupportActionBar().setTitle(getFile().getFileName());
 445                 //if (!stateWasRecovered) {
 446                     initViewPager();
 447                 //}
 448
 449             } else {
 450                 // handled file not in the current Account
 451                 finish();
 452             }
 453
 454         } else {
 455             Log_OC.wtf(TAG, "onAccountChanged was called with NULL account associated!");
 456         }
 457     }
 458
 459
 460 }