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.app.Fragment;
  30 import android.support.v4.app.FragmentManager;
  31 import android.support.v4.app.FragmentTransaction;
  32 import android.support.v4.view.ViewPager;
  33 import android.view.MotionEvent;
  34 import android.view.View;
  35 import android.view.View.OnTouchListener;
  36
  37 import com.actionbarsherlock.app.ActionBar;
  38 import com.actionbarsherlock.view.MenuItem;
  39 import com.actionbarsherlock.view.Window;
  40 import com.owncloud.android.authentication.AccountUtils;
  41 import com.owncloud.android.datamodel.DataStorageManager;
  42 import com.owncloud.android.datamodel.FileDataStorageManager;
  43 import com.owncloud.android.datamodel.OCFile;
  44 import com.owncloud.android.files.services.FileDownloader;
  45 import com.owncloud.android.files.services.FileDownloader.FileDownloaderBinder;
  46 import com.owncloud.android.files.services.FileUploader;
  47 import com.owncloud.android.files.services.FileUploader.FileUploaderBinder;
  48 import com.owncloud.android.ui.activity.FileActivity;
  49 import com.owncloud.android.ui.activity.FileDisplayActivity;
  50 import com.owncloud.android.ui.dialog.LoadingDialog;
  51 import com.owncloud.android.ui.fragment.FileFragment;
  52
  53 import com.owncloud.android.Log_OC;
  54 import com.owncloud.android.R;
  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 DataStorageManager 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     private void initViewPager() {
 108         OCFile parentFolder = mStorageManager.getFileById(getFile().getParentId());
 109         if (parentFolder == null) {
 110             // should not be necessary
 111             parentFolder = mStorageManager.getFileByPath(OCFile.PATH_SEPARATOR);
 112         }
 113         mPreviewImagePagerAdapter = new PreviewImagePagerAdapter(getSupportFragmentManager(), parentFolder, getAccount(), mStorageManager);
 114         mViewPager = (ViewPager) findViewById(R.id.fragmentPager);
 115         int position = mPreviewImagePagerAdapter.getFilePosition(getFile());
 116         position = (position >= 0) ? position : 0;
 117         mViewPager.setAdapter(mPreviewImagePagerAdapter);
 118         mViewPager.setOnPageChangeListener(this);
 119         mViewPager.setCurrentItem(position);
 120         if (position == 0 && !getFile().isDown()) {
 121             // this is necessary because mViewPager.setCurrentItem(0) just after setting the adapter does not result in a call to #onPageSelected(0)
 122             mRequestWaitingForBinder = true;
 123         }
 124     }
 125
 126
 127     @Override
 128     public void onStart() {
 129         super.onStart();
 130         mDownloadConnection = new PreviewImageServiceConnection();
 131         bindService(new Intent(this, FileDownloader.class), mDownloadConnection, Context.BIND_AUTO_CREATE);
 132         mUploadConnection = new PreviewImageServiceConnection();
 133         bindService(new Intent(this, FileUploader.class), mUploadConnection, Context.BIND_AUTO_CREATE);
 134     }
 135
 136     @Override
 137     protected void onSaveInstanceState(Bundle outState) {
 138         super.onSaveInstanceState(outState);
 139         outState.putBoolean(KEY_WAITING_FOR_BINDER, mRequestWaitingForBinder);
 140     }
 141
 142
 143     /** Defines callbacks for service binding, passed to bindService() */
 144     private class PreviewImageServiceConnection implements ServiceConnection {
 145
 146         @Override
 147         public void onServiceConnected(ComponentName component, IBinder service) {
 148
 149             if (component.equals(new ComponentName(PreviewImageActivity.this, FileDownloader.class))) {
 150                 mDownloaderBinder = (FileDownloaderBinder) service;
 151                 if (mRequestWaitingForBinder) {
 152                     mRequestWaitingForBinder = false;
 153                     Log_OC.d(TAG, "Simulating reselection of current page after connection of download binder");
 154                     onPageSelected(mViewPager.getCurrentItem());
 155                 }
 156
 157             } else if (component.equals(new ComponentName(PreviewImageActivity.this, FileUploader.class))) {
 158                 Log_OC.d(TAG, "Upload service connected");
 159                 mUploaderBinder = (FileUploaderBinder) service;
 160             } else {
 161                 return;
 162             }
 163
 164         }
 165
 166         @Override
 167         public void onServiceDisconnected(ComponentName component) {
 168             if (component.equals(new ComponentName(PreviewImageActivity.this, FileDownloader.class))) {
 169                 Log_OC.d(TAG, "Download service suddenly disconnected");
 170                 mDownloaderBinder = null;
 171             } else if (component.equals(new ComponentName(PreviewImageActivity.this, FileUploader.class))) {
 172                 Log_OC.d(TAG, "Upload service suddenly disconnected");
 173                 mUploaderBinder = null;
 174             }
 175         }
 176     };
 177
 178
 179     @Override
 180     public void onStop() {
 181         super.onStop();
 182         if (mDownloadConnection != null) {
 183             unbindService(mDownloadConnection);
 184             mDownloadConnection = null;
 185         }
 186         if (mUploadConnection != null) {
 187             unbindService(mUploadConnection);
 188             mUploadConnection = null;
 189         }
 190     }
 191
 192
 193     @Override
 194     public void onDestroy() {
 195         super.onDestroy();
 196     }
 197
 198
 199     @Override
 200     public boolean onOptionsItemSelected(MenuItem item) {
 201         boolean returnValue = false;
 202
 203         switch(item.getItemId()){
 204         case android.R.id.home:
 205             backToDisplayActivity();
 206             returnValue = true;
 207             break;
 208         default:
 209                 returnValue = super.onOptionsItemSelected(item);
 210         }
 211
 212         return returnValue;
 213     }
 214
 215
 216     @Override
 217     protected void onResume() {
 218         super.onResume();
 219         //Log.e(TAG, "ACTIVITY, ONRESUME");
 220         mDownloadFinishReceiver = new DownloadFinishReceiver();
 221         IntentFilter filter = new IntentFilter(FileDownloader.DOWNLOAD_FINISH_MESSAGE);
 222         filter.addAction(FileDownloader.DOWNLOAD_ADDED_MESSAGE);
 223         registerReceiver(mDownloadFinishReceiver, filter);
 224     }
 225
 226     @Override
 227     protected void onPostResume() {
 228         //Log.e(TAG, "ACTIVITY, ONPOSTRESUME");
 229         super.onPostResume();
 230     }
 231
 232     @Override
 233     public void onPause() {
 234         super.onPause();
 235         unregisterReceiver(mDownloadFinishReceiver);
 236         mDownloadFinishReceiver = null;
 237     }
 238
 239
 240     private void backToDisplayActivity() {
 241         finish();
 242     }
 243
 244
 245 //    @Override
 246 //    protected Dialog onCreateDialog(int id) {
 247 //        Dialog dialog = null;
 248 //        switch (id) {
 249 //        case DIALOG_SHORT_WAIT: {
 250 //            ProgressDialog working_dialog = new ProgressDialog(this);
 251 //            working_dialog.setMessage(getResources().getString(
 252 //                    R.string.wait_a_moment));
 253 //            working_dialog.setIndeterminate(true);
 254 //            working_dialog.setCancelable(false);
 255 //            dialog = working_dialog;
 256 //            break;
 257 //        }
 258 //        default:
 259 //            dialog = null;
 260 //        }
 261 //        return dialog;
 262 //    }
 263
 264
 265     /**
 266      * Show loading dialog
 267      */
 268     public void showLoadingDialog() {
 269         // Construct dialog
 270         LoadingDialog loading = new LoadingDialog(getResources().getString(R.string.wait_a_moment));
 271         FragmentManager fm = getSupportFragmentManager();
 272         FragmentTransaction ft = fm.beginTransaction();
 273         loading.show(ft, DIALOG_WAIT_TAG);
 274
 275     }
 276
 277     /**
 278      * Dismiss loading dialog
 279      */
 280     public void dismissLoadingDialog(){
 281         Fragment frag = getSupportFragmentManager().findFragmentByTag(DIALOG_WAIT_TAG);
 282       if (frag != null) {
 283           LoadingDialog loading = (LoadingDialog) frag;
 284             loading.dismiss();
 285         }
 286     }
 287
 288     /**
 289      * {@inheritDoc}
 290      */
 291     @Override
 292     public void onFileStateChanged() {
 293         // nothing to do here!
 294     }
 295
 296
 297     /**
 298      * {@inheritDoc}
 299      */
 300     @Override
 301     public FileDownloaderBinder getFileDownloaderBinder() {
 302         return mDownloaderBinder;
 303     }
 304
 305
 306     @Override
 307     public FileUploaderBinder getFileUploaderBinder() {
 308         return mUploaderBinder;
 309     }
 310
 311
 312     @Override
 313     public void showDetails(OCFile file) {
 314         Intent showDetailsIntent = new Intent(this, FileDisplayActivity.class);
 315         showDetailsIntent.setAction(FileDisplayActivity.ACTION_DETAILS);
 316         showDetailsIntent.putExtra(FileActivity.EXTRA_FILE, file);
 317         showDetailsIntent.putExtra(FileActivity.EXTRA_ACCOUNT, AccountUtils.getCurrentOwnCloudAccount(this));
 318         startActivity(showDetailsIntent);
 319         int pos = mPreviewImagePagerAdapter.getFilePosition(file);
 320         file = mPreviewImagePagerAdapter.getFileAt(pos);
 321
 322     }
 323
 324
 325     private void requestForDownload(OCFile file) {
 326         if (mDownloaderBinder == null) {
 327             Log_OC.d(TAG, "requestForDownload called without binder to download service");
 328
 329         } else if (!mDownloaderBinder.isDownloading(getAccount(), file)) {
 330             Intent i = new Intent(this, FileDownloader.class);
 331             i.putExtra(FileDownloader.EXTRA_ACCOUNT, getAccount());
 332             i.putExtra(FileDownloader.EXTRA_FILE, file);
 333             startService(i);
 334         }
 335     }
 336
 337     /**
 338      * This method will be invoked when a new page becomes selected. Animation is not necessarily complete.
 339      *
 340      *  @param  Position        Position index of the new selected page
 341      */
 342     @Override
 343     public void onPageSelected(int position) {
 344         if (mDownloaderBinder == null) {
 345             mRequestWaitingForBinder = true;
 346
 347         } else {
 348             OCFile currentFile = mPreviewImagePagerAdapter.getFileAt(position);
 349             getSupportActionBar().setTitle(currentFile.getFileName());
 350             if (!currentFile.isDown()) {
 351                 if (!mPreviewImagePagerAdapter.pendingErrorAt(position)) {
 352                     requestForDownload(currentFile);
 353                 }
 354             }
 355         }
 356     }
 357
 358     /**
 359      * Called when the scroll state changes. Useful for discovering when the user begins dragging,
 360      * when the pager is automatically settling to the current page. when it is fully stopped/idle.
 361      *
 362      * @param   State       The new scroll state (SCROLL_STATE_IDLE, _DRAGGING, _SETTLING
 363      */
 364     @Override
 365     public void onPageScrollStateChanged(int state) {
 366     }
 367
 368     /**
 369      * This method will be invoked when the current page is scrolled, either as part of a programmatically
 370      * initiated smooth scroll or a user initiated touch scroll.
 371      *
 372      * @param   position                Position index of the first page currently being displayed.
 373      *                                  Page position+1 will be visible if positionOffset is nonzero.
 374      *
 375      * @param   positionOffset          Value from [0, 1) indicating the offset from the page at position.
 376      * @param   positionOffsetPixels    Value in pixels indicating the offset from position.
 377      */
 378     @Override
 379     public void onPageScrolled(int position, float positionOffset, int positionOffsetPixels) {
 380     }
 381
 382
 383     /**
 384      * Class waiting for broadcast events from the {@link FielDownloader} service.
 385      *
 386      * Updates the UI when a download is started or finished, provided that it is relevant for the
 387      * folder displayed in the gallery.
 388      */
 389     private class DownloadFinishReceiver extends BroadcastReceiver {
 390         @Override
 391         public void onReceive(Context context, Intent intent) {
 392             String accountName = intent.getStringExtra(FileDownloader.ACCOUNT_NAME);
 393             String downloadedRemotePath = intent.getStringExtra(FileDownloader.EXTRA_REMOTE_PATH);
 394             if (getAccount().name.equals(accountName) &&
 395                     downloadedRemotePath != null) {
 396
 397                 OCFile file = mStorageManager.getFileByPath(downloadedRemotePath);
 398                 int position = mPreviewImagePagerAdapter.getFilePosition(file);
 399                 boolean downloadWasFine = intent.getBooleanExtra(FileDownloader.EXTRA_DOWNLOAD_RESULT, false);
 400                 //boolean isOffscreen =  Math.abs((mViewPager.getCurrentItem() - position)) <= mViewPager.getOffscreenPageLimit();
 401
 402                 if (position >= 0 && intent.getAction().equals(FileDownloader.DOWNLOAD_FINISH_MESSAGE)) {
 403                     if (downloadWasFine) {
 404                         mPreviewImagePagerAdapter.updateFile(position, file);
 405
 406                     } else {
 407                         mPreviewImagePagerAdapter.updateWithDownloadError(position);
 408                     }
 409                     mPreviewImagePagerAdapter.notifyDataSetChanged();   // will trigger the creation of new fragments
 410
 411                 } else {
 412                     Log_OC.d(TAG, "Download finished, but the fragment is offscreen");
 413                 }
 414
 415             }
 416             removeStickyBroadcast(intent);
 417         }
 418
 419     }
 420
 421
 422     @Override
 423     public boolean onTouch(View v, MotionEvent event) {
 424         if (event.getAction() == MotionEvent.ACTION_UP) {
 425            toggleFullScreen();
 426         }
 427         return true;
 428     }
 429
 430
 431     private void toggleFullScreen() {
 432         ActionBar actionBar = getSupportActionBar();
 433         if (mFullScreen) {
 434             actionBar.show();
 435
 436         } else {
 437             actionBar.hide();
 438
 439         }
 440         mFullScreen = !mFullScreen;
 441     }
 442
 443     @Override
 444     protected void onAccountSet(boolean stateWasRecovered) {
 445         if (getAccount() != null) {
 446             OCFile file = getFile();
 447             /// Validate handled file  (first image to preview)
 448             if (file == null) {
 449                 throw new IllegalStateException("Instanced with a NULL OCFile");
 450             }
 451             if (!file.isImage()) {
 452                 throw new IllegalArgumentException("Non-image file passed as argument");
 453             }
 454             mStorageManager = new FileDataStorageManager(getAccount(), getContentResolver());
 455             file = mStorageManager.getFileById(file.getFileId());
 456             if (file != null) {
 457                 /// Refresh the activity according to the Account and OCFile set
 458                 setFile(file);  // reset after getting it fresh from mStorageManager
 459                 getSupportActionBar().setTitle(getFile().getFileName());
 460                 //if (!stateWasRecovered) {
 461                     initViewPager();
 462                 //}
 463
 464             } else {
 465                 // handled file not in the current Account
 466                 finish();
 467             }
 468
 469         } else {
 470             Log_OC.wtf(TAG, "onAccountChanged was called with NULL account associated!");
 471         }
 472     }
 473
 474
 475 }