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.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.R;
  41 import com.owncloud.android.authentication.AccountUtils;
  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.FileUploader;
  46 import com.owncloud.android.files.services.FileDownloader.FileDownloaderBinder;
  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.activity.PinCodeActivity;
  51 import com.owncloud.android.ui.dialog.LoadingDialog;
  52 import com.owncloud.android.ui.fragment.FileFragment;
  53 import com.owncloud.android.utils.DisplayUtils;
  54 import com.owncloud.android.utils.Log_OC;
  55
  56
  57 /**
  58  *  Holds a swiping galley where image files contained in an ownCloud directory are shown
  59  *
  60  *  @author David A. Velasco
  61  */
  62 public class PreviewImageActivity extends FileActivity implements FileFragment.ContainerActivity, ViewPager.OnPageChangeListener, OnTouchListener {
  63
  64     public static final int DIALOG_SHORT_WAIT = 0;
  65
  66     public static final String TAG = PreviewImageActivity.class.getSimpleName();
  67
  68     public static final String KEY_WAITING_TO_PREVIEW = "WAITING_TO_PREVIEW";
  69     private static final String KEY_WAITING_FOR_BINDER = "WAITING_FOR_BINDER";
  70
  71     private static final String DIALOG_WAIT_TAG = "DIALOG_WAIT";
  72
  73     private FileDataStorageManager mStorageManager;
  74
  75     private ViewPager mViewPager;
  76     private PreviewImagePagerAdapter mPreviewImagePagerAdapter;
  77
  78     private FileDownloaderBinder mDownloaderBinder = null;
  79     private ServiceConnection mDownloadConnection, mUploadConnection = null;
  80     private FileUploaderBinder mUploaderBinder = null;
  81
  82     private boolean mRequestWaitingForBinder;
  83
  84     private DownloadFinishReceiver mDownloadFinishReceiver;
  85
  86     private boolean mFullScreen;
  87
  88
  89     @Override
  90     protected void onCreate(Bundle savedInstanceState) {
  91         super.onCreate(savedInstanceState);
  92
  93         requestWindowFeature(Window.FEATURE_ACTION_BAR_OVERLAY);
  94         setContentView(R.layout.preview_image_activity);
  95
  96         ActionBar actionBar = getSupportActionBar();
  97         actionBar.setIcon(DisplayUtils.getSeasonalIconId());
  98         actionBar.setDisplayHomeAsUpEnabled(true);
  99         actionBar.hide();
 100
 101         // PIN CODE request
 102         if (getIntent().getExtras() != null && savedInstanceState == null && fromNotification()) {
 103             requestPinCode();
 104         }
 105
 106         mFullScreen = true;
 107         if (savedInstanceState != null) {
 108             mRequestWaitingForBinder = savedInstanceState.getBoolean(KEY_WAITING_FOR_BINDER);
 109         } else {
 110             mRequestWaitingForBinder = false;
 111         }
 112
 113     }
 114
 115     private void initViewPager() {
 116         // get parent from path
 117         String parentPath = getFile().getRemotePath().substring(0, getFile().getRemotePath().lastIndexOf(getFile().getFileName()));
 118         OCFile parentFolder = mStorageManager.getFileByPath(parentPath);
 119         //OCFile parentFolder = mStorageManager.getFileById(getFile().getParentId());
 120         if (parentFolder == null) {
 121             // should not be necessary
 122             parentFolder = mStorageManager.getFileByPath(OCFile.ROOT_PATH);
 123         }
 124         mPreviewImagePagerAdapter = new PreviewImagePagerAdapter(getSupportFragmentManager(), parentFolder, getAccount(), mStorageManager);
 125         mViewPager = (ViewPager) findViewById(R.id.fragmentPager);
 126         int position = mPreviewImagePagerAdapter.getFilePosition(getFile());
 127         position = (position >= 0) ? position : 0;
 128         mViewPager.setAdapter(mPreviewImagePagerAdapter);
 129         mViewPager.setOnPageChangeListener(this);
 130         mViewPager.setCurrentItem(position);
 131         if (position == 0 && !getFile().isDown()) {
 132             // this is necessary because mViewPager.setCurrentItem(0) just after setting the adapter does not result in a call to #onPageSelected(0)
 133             mRequestWaitingForBinder = true;
 134         }
 135     }
 136
 137
 138     @Override
 139     public void onStart() {
 140         super.onStart();
 141         mDownloadConnection = new PreviewImageServiceConnection();
 142         bindService(new Intent(this, FileDownloader.class), mDownloadConnection, Context.BIND_AUTO_CREATE);
 143         mUploadConnection = new PreviewImageServiceConnection();
 144         bindService(new Intent(this, FileUploader.class), mUploadConnection, Context.BIND_AUTO_CREATE);
 145     }
 146
 147     @Override
 148     protected void onSaveInstanceState(Bundle outState) {
 149         super.onSaveInstanceState(outState);
 150         outState.putBoolean(KEY_WAITING_FOR_BINDER, mRequestWaitingForBinder);
 151     }
 152
 153
 154     /** Defines callbacks for service binding, passed to bindService() */
 155     private class PreviewImageServiceConnection implements ServiceConnection {
 156
 157         @Override
 158         public void onServiceConnected(ComponentName component, IBinder service) {
 159
 160             if (component.equals(new ComponentName(PreviewImageActivity.this, FileDownloader.class))) {
 161                 mDownloaderBinder = (FileDownloaderBinder) service;
 162                 if (mRequestWaitingForBinder) {
 163                     mRequestWaitingForBinder = false;
 164                     Log_OC.d(TAG, "Simulating reselection of current page after connection of download binder");
 165                     onPageSelected(mViewPager.getCurrentItem());
 166                 }
 167
 168             } else if (component.equals(new ComponentName(PreviewImageActivity.this, FileUploader.class))) {
 169                 Log_OC.d(TAG, "Upload service connected");
 170                 mUploaderBinder = (FileUploaderBinder) service;
 171             } else {
 172                 return;
 173             }
 174
 175         }
 176
 177         @Override
 178         public void onServiceDisconnected(ComponentName component) {
 179             if (component.equals(new ComponentName(PreviewImageActivity.this, FileDownloader.class))) {
 180                 Log_OC.d(TAG, "Download service suddenly disconnected");
 181                 mDownloaderBinder = null;
 182             } else if (component.equals(new ComponentName(PreviewImageActivity.this, FileUploader.class))) {
 183                 Log_OC.d(TAG, "Upload service suddenly disconnected");
 184                 mUploaderBinder = null;
 185             }
 186         }
 187     };
 188
 189
 190     @Override
 191     public void onStop() {
 192         super.onStop();
 193         if (mDownloadConnection != null) {
 194             unbindService(mDownloadConnection);
 195             mDownloadConnection = null;
 196         }
 197         if (mUploadConnection != null) {
 198             unbindService(mUploadConnection);
 199             mUploadConnection = null;
 200         }
 201     }
 202
 203
 204     @Override
 205     public void onDestroy() {
 206         super.onDestroy();
 207     }
 208
 209
 210     @Override
 211     public boolean onOptionsItemSelected(MenuItem item) {
 212         boolean returnValue = false;
 213
 214         switch(item.getItemId()){
 215         case android.R.id.home:
 216             backToDisplayActivity();
 217             returnValue = true;
 218             break;
 219         default:
 220                 returnValue = super.onOptionsItemSelected(item);
 221         }
 222
 223         return returnValue;
 224     }
 225
 226
 227     @Override
 228     protected void onResume() {
 229         super.onResume();
 230         //Log.e(TAG, "ACTIVITY, ONRESUME");
 231         mDownloadFinishReceiver = new DownloadFinishReceiver();
 232
 233         IntentFilter filter = new IntentFilter(FileDownloader.getDownloadFinishMessage());
 234         filter.addAction(FileDownloader.getDownloadAddedMessage());
 235         registerReceiver(mDownloadFinishReceiver, filter);
 236     }
 237
 238     @Override
 239     protected void onPostResume() {
 240         //Log.e(TAG, "ACTIVITY, ONPOSTRESUME");
 241         super.onPostResume();
 242     }
 243
 244     @Override
 245     public void onPause() {
 246         super.onPause();
 247         unregisterReceiver(mDownloadFinishReceiver);
 248         mDownloadFinishReceiver = null;
 249     }
 250
 251
 252     private void backToDisplayActivity() {
 253         finish();
 254     }
 255
 256     /**
 257      * Show loading dialog
 258      */
 259     public void showLoadingDialog() {
 260         // Construct dialog
 261         LoadingDialog loading = new LoadingDialog(getResources().getString(R.string.wait_a_moment));
 262         FragmentManager fm = getSupportFragmentManager();
 263         FragmentTransaction ft = fm.beginTransaction();
 264         loading.show(ft, DIALOG_WAIT_TAG);
 265
 266     }
 267
 268     /**
 269      * Dismiss loading dialog
 270      */
 271     public void dismissLoadingDialog(){
 272         Fragment frag = getSupportFragmentManager().findFragmentByTag(DIALOG_WAIT_TAG);
 273       if (frag != null) {
 274           LoadingDialog loading = (LoadingDialog) frag;
 275             loading.dismiss();
 276         }
 277     }
 278
 279     /**
 280      * {@inheritDoc}
 281      */
 282     @Override
 283     public void onFileStateChanged() {
 284         // nothing to do here!
 285     }
 286
 287
 288     /**
 289      * {@inheritDoc}
 290      */
 291     @Override
 292     public FileDownloaderBinder getFileDownloaderBinder() {
 293         return mDownloaderBinder;
 294     }
 295
 296
 297     @Override
 298     public FileUploaderBinder getFileUploaderBinder() {
 299         return mUploaderBinder;
 300     }
 301
 302
 303     @Override
 304     public void showDetails(OCFile file) {
 305         Intent showDetailsIntent = new Intent(this, FileDisplayActivity.class);
 306         showDetailsIntent.setAction(FileDisplayActivity.ACTION_DETAILS);
 307         showDetailsIntent.putExtra(FileActivity.EXTRA_FILE, file);
 308         showDetailsIntent.putExtra(FileActivity.EXTRA_ACCOUNT, AccountUtils.getCurrentOwnCloudAccount(this));
 309         startActivity(showDetailsIntent);
 310         int pos = mPreviewImagePagerAdapter.getFilePosition(file);
 311         file = mPreviewImagePagerAdapter.getFileAt(pos);
 312
 313     }
 314
 315
 316     private void requestForDownload(OCFile file) {
 317         if (mDownloaderBinder == null) {
 318             Log_OC.d(TAG, "requestForDownload called without binder to download service");
 319
 320         } else if (!mDownloaderBinder.isDownloading(getAccount(), file)) {
 321             Intent i = new Intent(this, FileDownloader.class);
 322             i.putExtra(FileDownloader.EXTRA_ACCOUNT, getAccount());
 323             i.putExtra(FileDownloader.EXTRA_FILE, file);
 324             startService(i);
 325         }
 326     }
 327
 328     /**
 329      * This method will be invoked when a new page becomes selected. Animation is not necessarily complete.
 330      *
 331      *  @param  Position        Position index of the new selected page
 332      */
 333     @Override
 334     public void onPageSelected(int position) {
 335         if (mDownloaderBinder == null) {
 336             mRequestWaitingForBinder = true;
 337
 338         } else {
 339             OCFile currentFile = mPreviewImagePagerAdapter.getFileAt(position);
 340             getSupportActionBar().setTitle(currentFile.getFileName());
 341             if (!currentFile.isDown()) {
 342                 if (!mPreviewImagePagerAdapter.pendingErrorAt(position)) {
 343                     requestForDownload(currentFile);
 344                 }
 345             }
 346         }
 347     }
 348
 349     /**
 350      * Called when the scroll state changes. Useful for discovering when the user begins dragging,
 351      * when the pager is automatically settling to the current page. when it is fully stopped/idle.
 352      *
 353      * @param   State       The new scroll state (SCROLL_STATE_IDLE, _DRAGGING, _SETTLING
 354      */
 355     @Override
 356     public void onPageScrollStateChanged(int state) {
 357     }
 358
 359     /**
 360      * This method will be invoked when the current page is scrolled, either as part of a programmatically
 361      * initiated smooth scroll or a user initiated touch scroll.
 362      *
 363      * @param   position                Position index of the first page currently being displayed.
 364      *                                  Page position+1 will be visible if positionOffset is nonzero.
 365      *
 366      * @param   positionOffset          Value from [0, 1) indicating the offset from the page at position.
 367      * @param   positionOffsetPixels    Value in pixels indicating the offset from position.
 368      */
 369     @Override
 370     public void onPageScrolled(int position, float positionOffset, int positionOffsetPixels) {
 371     }
 372
 373
 374     /**
 375      * Class waiting for broadcast events from the {@link FielDownloader} service.
 376      *
 377      * Updates the UI when a download is started or finished, provided that it is relevant for the
 378      * folder displayed in the gallery.
 379      */
 380     private class DownloadFinishReceiver extends BroadcastReceiver {
 381         @Override
 382         public void onReceive(Context context, Intent intent) {
 383             String accountName = intent.getStringExtra(FileDownloader.ACCOUNT_NAME);
 384             String downloadedRemotePath = intent.getStringExtra(FileDownloader.EXTRA_REMOTE_PATH);
 385             if (getAccount().name.equals(accountName) &&
 386                     downloadedRemotePath != null) {
 387
 388                 OCFile file = mStorageManager.getFileByPath(downloadedRemotePath);
 389                 int position = mPreviewImagePagerAdapter.getFilePosition(file);
 390                 boolean downloadWasFine = intent.getBooleanExtra(FileDownloader.EXTRA_DOWNLOAD_RESULT, false);
 391                 //boolean isOffscreen =  Math.abs((mViewPager.getCurrentItem() - position)) <= mViewPager.getOffscreenPageLimit();
 392
 393                 if (position >= 0 && intent.getAction().equals(FileDownloader.getDownloadFinishMessage())) {
 394                     if (downloadWasFine) {
 395                         mPreviewImagePagerAdapter.updateFile(position, file);
 396
 397                     } else {
 398                         mPreviewImagePagerAdapter.updateWithDownloadError(position);
 399                     }
 400                     mPreviewImagePagerAdapter.notifyDataSetChanged();   // will trigger the creation of new fragments
 401
 402                 } else {
 403                     Log_OC.d(TAG, "Download finished, but the fragment is offscreen");
 404                 }
 405
 406             }
 407             removeStickyBroadcast(intent);
 408         }
 409
 410     }
 411
 412
 413     @Override
 414     public boolean onTouch(View v, MotionEvent event) {
 415         if (event.getAction() == MotionEvent.ACTION_UP) {
 416            toggleFullScreen();
 417         }
 418         return true;
 419     }
 420
 421
 422     private void toggleFullScreen() {
 423         ActionBar actionBar = getSupportActionBar();
 424         if (mFullScreen) {
 425             actionBar.show();
 426
 427         } else {
 428             actionBar.hide();
 429
 430         }
 431         mFullScreen = !mFullScreen;
 432     }
 433
 434     @Override
 435     protected void onAccountSet(boolean stateWasRecovered) {
 436         if (getAccount() != null) {
 437             OCFile file = getFile();
 438             /// Validate handled file  (first image to preview)
 439             if (file == null) {
 440                 throw new IllegalStateException("Instanced with a NULL OCFile");
 441             }
 442             if (!file.isImage()) {
 443                 throw new IllegalArgumentException("Non-image file passed as argument");
 444             }
 445             mStorageManager = new FileDataStorageManager(getAccount(), getContentResolver());
 446
 447             // Update file according to DB file, if it is possible
 448             if (file.getFileId() > FileDataStorageManager.ROOT_PARENT_ID)
 449                 file = mStorageManager.getFileById(file.getFileId());
 450
 451             if (file != null) {
 452                 /// Refresh the activity according to the Account and OCFile set
 453                 setFile(file);  // reset after getting it fresh from mStorageManager
 454                 getSupportActionBar().setTitle(getFile().getFileName());
 455                 //if (!stateWasRecovered) {
 456                     initViewPager();
 457                 //}
 458
 459             } else {
 460                 // handled file not in the current Account
 461                 finish();
 462             }
 463
 464         } else {
 465             Log_OC.wtf(TAG, "onAccountChanged was called with NULL account associated!");
 466         }
 467     }
 468
 469
 470     /**
 471      * Launch an intent to request the PIN code to the user before letting him use the app
 472      */
 473     private void requestPinCode() {
 474         boolean pinStart = false;
 475         SharedPreferences appPrefs = PreferenceManager.getDefaultSharedPreferences(getApplicationContext());
 476         pinStart = appPrefs.getBoolean("set_pincode", false);
 477         if (pinStart) {
 478             Intent i = new Intent(getApplicationContext(), PinCodeActivity.class);
 479             i.putExtra(PinCodeActivity.EXTRA_ACTIVITY, "PreviewImageActivity");
 480             startActivity(i);
 481         }
 482     }
 483
 484 }