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.authentication.AccountUtils;
  39 import com.owncloud.android.datamodel.DataStorageManager;
  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.FileDownloader.FileDownloaderBinder;
  44 import com.owncloud.android.files.services.FileUploader;
  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
  51 import com.owncloud.android.Log_OC;
  52 import com.owncloud.android.R;
  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 DataStorageManager 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     private String mDownloadAddedMessage;
  86     private String mDownloadFinishMessage;
  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.setDisplayHomeAsUpEnabled(true);
  98         actionBar.hide();
  99
 100         mFullScreen = true;
 101         if (savedInstanceState != null) {
 102             mRequestWaitingForBinder = savedInstanceState.getBoolean(KEY_WAITING_FOR_BINDER);
 103         } else {
 104             mRequestWaitingForBinder = false;
 105         }
 106
 107         FileDownloader downloader = new FileDownloader();
 108         mDownloadAddedMessage = downloader.getDownloadAddedMessage();
 109         mDownloadFinishMessage= downloader.getDownloadFinishMessage();
 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 = mStorageManager.getFileByPath(parentPath);
 116         //OCFile parentFolder = mStorageManager.getFileById(getFile().getParentId());
 117         if (parentFolder == null) {
 118             // should not be necessary
 119             parentFolder = mStorageManager.getFileByPath(OCFile.PATH_SEPARATOR);
 120         }
 121         mPreviewImagePagerAdapter = new PreviewImagePagerAdapter(getSupportFragmentManager(), parentFolder, getAccount(), mStorageManager);
 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
 151     /** Defines callbacks for service binding, passed to bindService() */
 152     private class PreviewImageServiceConnection implements ServiceConnection {
 153
 154         @Override
 155         public void onServiceConnected(ComponentName component, IBinder service) {
 156
 157             if (component.equals(new ComponentName(PreviewImageActivity.this, FileDownloader.class))) {
 158                 mDownloaderBinder = (FileDownloaderBinder) service;
 159                 if (mRequestWaitingForBinder) {
 160                     mRequestWaitingForBinder = false;
 161                     Log_OC.d(TAG, "Simulating reselection of current page after connection of download binder");
 162                     onPageSelected(mViewPager.getCurrentItem());
 163                 }
 164
 165             } else if (component.equals(new ComponentName(PreviewImageActivity.this, FileUploader.class))) {
 166                 Log_OC.d(TAG, "Upload service connected");
 167                 mUploaderBinder = (FileUploaderBinder) service;
 168             } else {
 169                 return;
 170             }
 171
 172         }
 173
 174         @Override
 175         public void onServiceDisconnected(ComponentName component) {
 176             if (component.equals(new ComponentName(PreviewImageActivity.this, FileDownloader.class))) {
 177                 Log_OC.d(TAG, "Download service suddenly disconnected");
 178                 mDownloaderBinder = null;
 179             } else if (component.equals(new ComponentName(PreviewImageActivity.this, FileUploader.class))) {
 180                 Log_OC.d(TAG, "Upload service suddenly disconnected");
 181                 mUploaderBinder = null;
 182             }
 183         }
 184     };
 185
 186
 187     @Override
 188     public void onStop() {
 189         super.onStop();
 190         if (mDownloadConnection != null) {
 191             unbindService(mDownloadConnection);
 192             mDownloadConnection = null;
 193         }
 194         if (mUploadConnection != null) {
 195             unbindService(mUploadConnection);
 196             mUploadConnection = null;
 197         }
 198     }
 199
 200
 201     @Override
 202     public void onDestroy() {
 203         super.onDestroy();
 204     }
 205
 206
 207     @Override
 208     public boolean onOptionsItemSelected(MenuItem item) {
 209         boolean returnValue = false;
 210
 211         switch(item.getItemId()){
 212         case android.R.id.home:
 213             backToDisplayActivity();
 214             returnValue = true;
 215             break;
 216         default:
 217                 returnValue = super.onOptionsItemSelected(item);
 218         }
 219
 220         return returnValue;
 221     }
 222
 223
 224     @Override
 225     protected void onResume() {
 226         super.onResume();
 227         //Log.e(TAG, "ACTIVITY, ONRESUME");
 228         mDownloadFinishReceiver = new DownloadFinishReceiver();
 229
 230         IntentFilter filter = new IntentFilter(mDownloadFinishMessage);
 231         filter.addAction(mDownloadAddedMessage);
 232         registerReceiver(mDownloadFinishReceiver, filter);
 233     }
 234
 235     @Override
 236     protected void onPostResume() {
 237         //Log.e(TAG, "ACTIVITY, ONPOSTRESUME");
 238         super.onPostResume();
 239     }
 240
 241     @Override
 242     public void onPause() {
 243         super.onPause();
 244         unregisterReceiver(mDownloadFinishReceiver);
 245         mDownloadFinishReceiver = null;
 246     }
 247
 248
 249     private void backToDisplayActivity() {
 250         finish();
 251     }
 252
 253     /**
 254      * Show loading dialog
 255      */
 256     public void showLoadingDialog() {
 257         // Construct dialog
 258         LoadingDialog loading = new LoadingDialog(getResources().getString(R.string.wait_a_moment));
 259         FragmentManager fm = getSupportFragmentManager();
 260         FragmentTransaction ft = fm.beginTransaction();
 261         loading.show(ft, DIALOG_WAIT_TAG);
 262
 263     }
 264
 265     /**
 266      * Dismiss loading dialog
 267      */
 268     public void dismissLoadingDialog(){
 269         Fragment frag = getSupportFragmentManager().findFragmentByTag(DIALOG_WAIT_TAG);
 270       if (frag != null) {
 271           LoadingDialog loading = (LoadingDialog) frag;
 272             loading.dismiss();
 273         }
 274     }
 275
 276     /**
 277      * {@inheritDoc}
 278      */
 279     @Override
 280     public void onFileStateChanged() {
 281         // nothing to do here!
 282     }
 283
 284
 285     /**
 286      * {@inheritDoc}
 287      */
 288     @Override
 289     public FileDownloaderBinder getFileDownloaderBinder() {
 290         return mDownloaderBinder;
 291     }
 292
 293
 294     @Override
 295     public FileUploaderBinder getFileUploaderBinder() {
 296         return mUploaderBinder;
 297     }
 298
 299
 300     @Override
 301     public void showDetails(OCFile file) {
 302         Intent showDetailsIntent = new Intent(this, FileDisplayActivity.class);
 303         showDetailsIntent.setAction(FileDisplayActivity.ACTION_DETAILS);
 304         showDetailsIntent.putExtra(FileActivity.EXTRA_FILE, file);
 305         showDetailsIntent.putExtra(FileActivity.EXTRA_ACCOUNT, AccountUtils.getCurrentOwnCloudAccount(this));
 306         startActivity(showDetailsIntent);
 307         int pos = mPreviewImagePagerAdapter.getFilePosition(file);
 308         file = mPreviewImagePagerAdapter.getFileAt(pos);
 309
 310     }
 311
 312
 313     private void requestForDownload(OCFile file) {
 314         if (mDownloaderBinder == null) {
 315             Log_OC.d(TAG, "requestForDownload called without binder to download service");
 316
 317         } else if (!mDownloaderBinder.isDownloading(getAccount(), file)) {
 318             Intent i = new Intent(this, FileDownloader.class);
 319             i.putExtra(FileDownloader.EXTRA_ACCOUNT, getAccount());
 320             i.putExtra(FileDownloader.EXTRA_FILE, file);
 321             startService(i);
 322         }
 323     }
 324
 325     /**
 326      * This method will be invoked when a new page becomes selected. Animation is not necessarily complete.
 327      *
 328      *  @param  Position        Position index of the new selected page
 329      */
 330     @Override
 331     public void onPageSelected(int position) {
 332         if (mDownloaderBinder == null) {
 333             mRequestWaitingForBinder = true;
 334
 335         } else {
 336             OCFile currentFile = mPreviewImagePagerAdapter.getFileAt(position);
 337             getSupportActionBar().setTitle(currentFile.getFileName());
 338             if (!currentFile.isDown()) {
 339                 if (!mPreviewImagePagerAdapter.pendingErrorAt(position)) {
 340                     requestForDownload(currentFile);
 341                 }
 342             }
 343         }
 344     }
 345
 346     /**
 347      * Called when the scroll state changes. Useful for discovering when the user begins dragging,
 348      * when the pager is automatically settling to the current page. when it is fully stopped/idle.
 349      *
 350      * @param   State       The new scroll state (SCROLL_STATE_IDLE, _DRAGGING, _SETTLING
 351      */
 352     @Override
 353     public void onPageScrollStateChanged(int state) {
 354     }
 355
 356     /**
 357      * This method will be invoked when the current page is scrolled, either as part of a programmatically
 358      * initiated smooth scroll or a user initiated touch scroll.
 359      *
 360      * @param   position                Position index of the first page currently being displayed.
 361      *                                  Page position+1 will be visible if positionOffset is nonzero.
 362      *
 363      * @param   positionOffset          Value from [0, 1) indicating the offset from the page at position.
 364      * @param   positionOffsetPixels    Value in pixels indicating the offset from position.
 365      */
 366     @Override
 367     public void onPageScrolled(int position, float positionOffset, int positionOffsetPixels) {
 368     }
 369
 370
 371     /**
 372      * Class waiting for broadcast events from the {@link FielDownloader} service.
 373      *
 374      * Updates the UI when a download is started or finished, provided that it is relevant for the
 375      * folder displayed in the gallery.
 376      */
 377     private class DownloadFinishReceiver extends BroadcastReceiver {
 378         @Override
 379         public void onReceive(Context context, Intent intent) {
 380             String accountName = intent.getStringExtra(FileDownloader.ACCOUNT_NAME);
 381             String downloadedRemotePath = intent.getStringExtra(FileDownloader.EXTRA_REMOTE_PATH);
 382             if (getAccount().name.equals(accountName) &&
 383                     downloadedRemotePath != null) {
 384
 385                 OCFile file = mStorageManager.getFileByPath(downloadedRemotePath);
 386                 int position = mPreviewImagePagerAdapter.getFilePosition(file);
 387                 boolean downloadWasFine = intent.getBooleanExtra(FileDownloader.EXTRA_DOWNLOAD_RESULT, false);
 388                 //boolean isOffscreen =  Math.abs((mViewPager.getCurrentItem() - position)) <= mViewPager.getOffscreenPageLimit();
 389
 390                 if (position >= 0 && intent.getAction().equals(mDownloadFinishMessage)) {
 391                     if (downloadWasFine) {
 392                         mPreviewImagePagerAdapter.updateFile(position, file);
 393
 394                     } else {
 395                         mPreviewImagePagerAdapter.updateWithDownloadError(position);
 396                     }
 397                     mPreviewImagePagerAdapter.notifyDataSetChanged();   // will trigger the creation of new fragments
 398
 399                 } else {
 400                     Log_OC.d(TAG, "Download finished, but the fragment is offscreen");
 401                 }
 402
 403             }
 404             removeStickyBroadcast(intent);
 405         }
 406
 407     }
 408
 409
 410     @Override
 411     public boolean onTouch(View v, MotionEvent event) {
 412         if (event.getAction() == MotionEvent.ACTION_UP) {
 413            toggleFullScreen();
 414         }
 415         return true;
 416     }
 417
 418
 419     private void toggleFullScreen() {
 420         ActionBar actionBar = getSupportActionBar();
 421         if (mFullScreen) {
 422             actionBar.show();
 423
 424         } else {
 425             actionBar.hide();
 426
 427         }
 428         mFullScreen = !mFullScreen;
 429     }
 430
 431     @Override
 432     protected void onAccountSet(boolean stateWasRecovered) {
 433         if (getAccount() != null) {
 434             OCFile file = getFile();
 435             /// Validate handled file  (first image to preview)
 436             if (file == null) {
 437                 throw new IllegalStateException("Instanced with a NULL OCFile");
 438             }
 439             if (!file.isImage()) {
 440                 throw new IllegalArgumentException("Non-image file passed as argument");
 441             }
 442             mStorageManager = new FileDataStorageManager(getAccount(), getContentResolver());
 443
 444             // Update file according to DB file, if it is possible
 445             if (file.getFileId() > DataStorageManager.ROOT_PARENT_ID)
 446                 file = mStorageManager.getFileById(file.getFileId());
 447
 448             if (file != null) {
 449                 /// Refresh the activity according to the Account and OCFile set
 450                 setFile(file);  // reset after getting it fresh from mStorageManager
 451                 getSupportActionBar().setTitle(getFile().getFileName());
 452                 //if (!stateWasRecovered) {
 453                     initViewPager();
 454                 //}
 455
 456             } else {
 457                 // handled file not in the current Account
 458                 finish();
 459             }
 460
 461         } else {
 462             Log_OC.wtf(TAG, "onAccountChanged was called with NULL account associated!");
 463         }
 464     }
 465
 466
 467 }