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