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