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.UnshareLinkOperation;
  51 import com.owncloud.android.ui.activity.FileActivity;
  52 import com.owncloud.android.ui.activity.FileDisplayActivity;
  53 import com.owncloud.android.ui.activity.PinCodeActivity;
  54 import com.owncloud.android.ui.fragment.FileFragment;
  55 import com.owncloud.android.utils.DisplayUtils;
  56 import com.owncloud.android.utils.Log_OC;
  57
  58
  59 /**
  60  *  Holds a swiping galley where image files contained in an ownCloud directory are shown
  61  *
  62  *  @author David A. Velasco
  63  */
  64 public class PreviewImageActivity extends FileActivity implements FileFragment.ContainerActivity, ViewPager.OnPageChangeListener, OnTouchListener , OnRemoteOperationListener{
  65
  66     public static final int DIALOG_SHORT_WAIT = 0;
  67
  68     public static final String TAG = PreviewImageActivity.class.getSimpleName();
  69
  70     public static final String KEY_WAITING_TO_PREVIEW = "WAITING_TO_PREVIEW";
  71     private static final String KEY_WAITING_FOR_BINDER = "WAITING_FOR_BINDER";
  72
  73     private ViewPager mViewPager;
  74     private PreviewImagePagerAdapter mPreviewImagePagerAdapter;
  75
  76     private FileDownloaderBinder mDownloaderBinder = null;
  77     private ServiceConnection mDownloadConnection, mUploadConnection = null;
  78     private FileUploaderBinder mUploaderBinder = null;
  79
  80     private boolean mRequestWaitingForBinder;
  81
  82     private DownloadFinishReceiver mDownloadFinishReceiver;
  83
  84     private boolean mFullScreen;
  85
  86
  87     @Override
  88     protected void onCreate(Bundle savedInstanceState) {
  89         super.onCreate(savedInstanceState);
  90
  91         requestWindowFeature(Window.FEATURE_ACTION_BAR_OVERLAY);
  92         setContentView(R.layout.preview_image_activity);
  93
  94         ActionBar actionBar = getSupportActionBar();
  95         actionBar.setIcon(DisplayUtils.getSeasonalIconId());
  96         actionBar.setDisplayHomeAsUpEnabled(true);
  97         actionBar.hide();
  98
  99         // PIN CODE request
 100         if (getIntent().getExtras() != null && savedInstanceState == null && fromNotification()) {
 101             requestPinCode();
 102         }
 103
 104         mFullScreen = true;
 105         if (savedInstanceState != null) {
 106             mRequestWaitingForBinder = savedInstanceState.getBoolean(KEY_WAITING_FOR_BINDER);
 107         } else {
 108             mRequestWaitingForBinder = false;
 109         }
 110
 111     }
 112
 113     private void initViewPager() {
 114         // get parent from path
 115         String parentPath = getFile().getRemotePath().substring(0, getFile().getRemotePath().lastIndexOf(getFile().getFileName()));
 116         OCFile parentFolder = getStorageManager().getFileByPath(parentPath);
 117         if (parentFolder == null) {
 118             // should not be necessary
 119             parentFolder = getStorageManager().getFileByPath(OCFile.ROOT_PATH);
 120         }
 121         mPreviewImagePagerAdapter = new PreviewImagePagerAdapter(getSupportFragmentManager(), parentFolder, getAccount(), getStorageManager());
 122         mViewPager = (ViewPager) findViewById(R.id.fragmentPager);
 123         int position = mPreviewImagePagerAdapter.getFilePosition(getFile());
 124         position = (position >= 0) ? position : 0;
 125         mViewPager.setAdapter(mPreviewImagePagerAdapter);
 126         mViewPager.setOnPageChangeListener(this);
 127         mViewPager.setCurrentItem(position);
 128         if (position == 0 && !getFile().isDown()) {
 129             // this is necessary because mViewPager.setCurrentItem(0) just after setting the adapter does not result in a call to #onPageSelected(0)
 130             mRequestWaitingForBinder = true;
 131         }
 132     }
 133
 134
 135     @Override
 136     public void onStart() {
 137         super.onStart();
 138         mDownloadConnection = new PreviewImageServiceConnection();
 139         bindService(new Intent(this, FileDownloader.class), mDownloadConnection, Context.BIND_AUTO_CREATE);
 140         mUploadConnection = new PreviewImageServiceConnection();
 141         bindService(new Intent(this, FileUploader.class), mUploadConnection, Context.BIND_AUTO_CREATE);
 142     }
 143
 144     @Override
 145     protected void onSaveInstanceState(Bundle outState) {
 146         super.onSaveInstanceState(outState);
 147         outState.putBoolean(KEY_WAITING_FOR_BINDER, mRequestWaitingForBinder);
 148     }
 149
 150     @Override
 151     public void onRemoteOperationFinish(RemoteOperation operation, RemoteOperationResult result) {
 152         super.onRemoteOperationFinish(operation, result);
 153
 154         if (operation instanceof CreateShareOperation) {
 155             onCreateShareOperationFinish((CreateShareOperation) operation, result);
 156
 157         } else if (operation instanceof UnshareLinkOperation) {
 158             onUnshareLinkOperationFinish((UnshareLinkOperation) operation, result);
 159
 160         }
 161     }
 162
 163
 164     private void onUnshareLinkOperationFinish(UnshareLinkOperation operation, RemoteOperationResult result) {
 165         if (result.isSuccess()) {
 166             OCFile file = getStorageManager().getFileByPath(getFile().getRemotePath());
 167             if (file != null) {
 168                 setFile(file);
 169             }
 170             invalidateOptionsMenu();
 171         } else if  (result.getCode() == ResultCode.SHARE_NOT_FOUND) {
 172             backToDisplayActivity();
 173         }
 174
 175     }
 176
 177     private void onCreateShareOperationFinish(CreateShareOperation operation, RemoteOperationResult result) {
 178         if (result.isSuccess()) {
 179             OCFile file = getStorageManager().getFileByPath(getFile().getRemotePath());
 180             if (file != null) {
 181                 setFile(file);
 182             }
 183             invalidateOptionsMenu();
 184         }
 185     }
 186
 187     /** Defines callbacks for service binding, passed to bindService() */
 188     private class PreviewImageServiceConnection implements ServiceConnection {
 189
 190         @Override
 191         public void onServiceConnected(ComponentName component, IBinder service) {
 192
 193             if (component.equals(new ComponentName(PreviewImageActivity.this, FileDownloader.class))) {
 194                 mDownloaderBinder = (FileDownloaderBinder) service;
 195                 if (mRequestWaitingForBinder) {
 196                     mRequestWaitingForBinder = false;
 197                     Log_OC.d(TAG, "Simulating reselection of current page after connection of download binder");
 198                     onPageSelected(mViewPager.getCurrentItem());
 199                 }
 200
 201             } else if (component.equals(new ComponentName(PreviewImageActivity.this, FileUploader.class))) {
 202                 Log_OC.d(TAG, "Upload service connected");
 203                 mUploaderBinder = (FileUploaderBinder) service;
 204             } else {
 205                 return;
 206             }
 207
 208         }
 209
 210         @Override
 211         public void onServiceDisconnected(ComponentName component) {
 212             if (component.equals(new ComponentName(PreviewImageActivity.this, FileDownloader.class))) {
 213                 Log_OC.d(TAG, "Download service suddenly disconnected");
 214                 mDownloaderBinder = null;
 215             } else if (component.equals(new ComponentName(PreviewImageActivity.this, FileUploader.class))) {
 216                 Log_OC.d(TAG, "Upload service suddenly disconnected");
 217                 mUploaderBinder = null;
 218             }
 219         }
 220     };
 221
 222
 223     @Override
 224     public void onStop() {
 225         super.onStop();
 226         if (mDownloadConnection != null) {
 227             unbindService(mDownloadConnection);
 228             mDownloadConnection = null;
 229         }
 230         if (mUploadConnection != null) {
 231             unbindService(mUploadConnection);
 232             mUploadConnection = null;
 233         }
 234     }
 235
 236
 237     @Override
 238     public void onDestroy() {
 239         super.onDestroy();
 240     }
 241
 242     @Override
 243     public boolean onOptionsItemSelected(MenuItem item) {
 244         boolean returnValue = false;
 245
 246         switch(item.getItemId()){
 247         case android.R.id.home:
 248             backToDisplayActivity();
 249             returnValue = true;
 250             break;
 251         default:
 252                 returnValue = super.onOptionsItemSelected(item);
 253         }
 254
 255         return returnValue;
 256     }
 257
 258
 259     @Override
 260     protected void onResume() {
 261         super.onResume();
 262         //Log.e(TAG, "ACTIVITY, ONRESUME");
 263         mDownloadFinishReceiver = new DownloadFinishReceiver();
 264
 265         IntentFilter filter = new IntentFilter(FileDownloader.getDownloadFinishMessage());
 266         filter.addAction(FileDownloader.getDownloadAddedMessage());
 267         registerReceiver(mDownloadFinishReceiver, filter);
 268     }
 269
 270     @Override
 271     protected void onPostResume() {
 272         //Log.e(TAG, "ACTIVITY, ONPOSTRESUME");
 273         super.onPostResume();
 274     }
 275
 276     @Override
 277     public void onPause() {
 278         super.onPause();
 279         unregisterReceiver(mDownloadFinishReceiver);
 280         mDownloadFinishReceiver = null;
 281     }
 282
 283
 284     private void backToDisplayActivity() {
 285         finish();
 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 = getStorageManager().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.getDownloadFinishMessage())) {
 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         super.onAccountSet(stateWasRecovered);
 446         if (getAccount() != null) {
 447             OCFile file = getFile();
 448             /// Validate handled file  (first image to preview)
 449             if (file == null) {
 450                 throw new IllegalStateException("Instanced with a NULL OCFile");
 451             }
 452             if (!file.isImage()) {
 453                 throw new IllegalArgumentException("Non-image file passed as argument");
 454             }
 455
 456             // Update file according to DB file, if it is possible
 457             if (file.getFileId() > FileDataStorageManager.ROOT_PARENT_ID)
 458                 file = getStorageManager().getFileById(file.getFileId());
 459
 460             if (file != null) {
 461                 /// Refresh the activity according to the Account and OCFile set
 462                 setFile(file);  // reset after getting it fresh from storageManager
 463                 getSupportActionBar().setTitle(getFile().getFileName());
 464                 //if (!stateWasRecovered) {
 465                     initViewPager();
 466                 //}
 467
 468             } else {
 469                 // handled file not in the current Account
 470                 finish();
 471             }
 472         }
 473     }
 474
 475
 476     /**
 477      * Launch an intent to request the PIN code to the user before letting him use the app
 478      */
 479     private void requestPinCode() {
 480         boolean pinStart = false;
 481         SharedPreferences appPrefs = PreferenceManager.getDefaultSharedPreferences(getApplicationContext());
 482         pinStart = appPrefs.getBoolean("set_pincode", false);
 483         if (pinStart) {
 484             Intent i = new Intent(getApplicationContext(), PinCodeActivity.class);
 485             i.putExtra(PinCodeActivity.EXTRA_ACTIVITY, "PreviewImageActivity");
 486             startActivity(i);
 487         }
 488     }
 489
 490 }