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      * Show loading dialog
 246      */
 247     public void showLoadingDialog() {
 248         // Construct dialog
 249         LoadingDialog loading = new LoadingDialog(getResources().getString(R.string.wait_a_moment));
 250         FragmentManager fm = getSupportFragmentManager();
 251         FragmentTransaction ft = fm.beginTransaction();
 252         loading.show(ft, DIALOG_WAIT_TAG);
 253
 254     }
 255
 256     /**
 257      * Dismiss loading dialog
 258      */
 259     public void dismissLoadingDialog(){
 260         Fragment frag = getSupportFragmentManager().findFragmentByTag(DIALOG_WAIT_TAG);
 261       if (frag != null) {
 262           LoadingDialog loading = (LoadingDialog) frag;
 263             loading.dismiss();
 264         }
 265     }
 266
 267     /**
 268      * {@inheritDoc}
 269      */
 270     @Override
 271     public void onFileStateChanged() {
 272         // nothing to do here!
 273     }
 274
 275
 276     /**
 277      * {@inheritDoc}
 278      */
 279     @Override
 280     public FileDownloaderBinder getFileDownloaderBinder() {
 281         return mDownloaderBinder;
 282     }
 283
 284
 285     @Override
 286     public FileUploaderBinder getFileUploaderBinder() {
 287         return mUploaderBinder;
 288     }
 289
 290
 291     @Override
 292     public void showDetails(OCFile file) {
 293         Intent showDetailsIntent = new Intent(this, FileDisplayActivity.class);
 294         showDetailsIntent.setAction(FileDisplayActivity.ACTION_DETAILS);
 295         showDetailsIntent.putExtra(FileActivity.EXTRA_FILE, file);
 296         showDetailsIntent.putExtra(FileActivity.EXTRA_ACCOUNT, AccountUtils.getCurrentOwnCloudAccount(this));
 297         startActivity(showDetailsIntent);
 298         int pos = mPreviewImagePagerAdapter.getFilePosition(file);
 299         file = mPreviewImagePagerAdapter.getFileAt(pos);
 300
 301     }
 302
 303
 304     private void requestForDownload(OCFile file) {
 305         if (mDownloaderBinder == null) {
 306             Log_OC.d(TAG, "requestForDownload called without binder to download service");
 307
 308         } else if (!mDownloaderBinder.isDownloading(getAccount(), file)) {
 309             Intent i = new Intent(this, FileDownloader.class);
 310             i.putExtra(FileDownloader.EXTRA_ACCOUNT, getAccount());
 311             i.putExtra(FileDownloader.EXTRA_FILE, file);
 312             startService(i);
 313         }
 314     }
 315
 316     /**
 317      * This method will be invoked when a new page becomes selected. Animation is not necessarily complete.
 318      *
 319      *  @param  Position        Position index of the new selected page
 320      */
 321     @Override
 322     public void onPageSelected(int position) {
 323         if (mDownloaderBinder == null) {
 324             mRequestWaitingForBinder = true;
 325
 326         } else {
 327             OCFile currentFile = mPreviewImagePagerAdapter.getFileAt(position);
 328             getSupportActionBar().setTitle(currentFile.getFileName());
 329             if (!currentFile.isDown()) {
 330                 if (!mPreviewImagePagerAdapter.pendingErrorAt(position)) {
 331                     requestForDownload(currentFile);
 332                 }
 333             }
 334         }
 335     }
 336
 337     /**
 338      * Called when the scroll state changes. Useful for discovering when the user begins dragging,
 339      * when the pager is automatically settling to the current page. when it is fully stopped/idle.
 340      *
 341      * @param   State       The new scroll state (SCROLL_STATE_IDLE, _DRAGGING, _SETTLING
 342      */
 343     @Override
 344     public void onPageScrollStateChanged(int state) {
 345     }
 346
 347     /**
 348      * This method will be invoked when the current page is scrolled, either as part of a programmatically
 349      * initiated smooth scroll or a user initiated touch scroll.
 350      *
 351      * @param   position                Position index of the first page currently being displayed.
 352      *                                  Page position+1 will be visible if positionOffset is nonzero.
 353      *
 354      * @param   positionOffset          Value from [0, 1) indicating the offset from the page at position.
 355      * @param   positionOffsetPixels    Value in pixels indicating the offset from position.
 356      */
 357     @Override
 358     public void onPageScrolled(int position, float positionOffset, int positionOffsetPixels) {
 359     }
 360
 361
 362     /**
 363      * Class waiting for broadcast events from the {@link FielDownloader} service.
 364      *
 365      * Updates the UI when a download is started or finished, provided that it is relevant for the
 366      * folder displayed in the gallery.
 367      */
 368     private class DownloadFinishReceiver extends BroadcastReceiver {
 369         @Override
 370         public void onReceive(Context context, Intent intent) {
 371             String accountName = intent.getStringExtra(FileDownloader.ACCOUNT_NAME);
 372             String downloadedRemotePath = intent.getStringExtra(FileDownloader.EXTRA_REMOTE_PATH);
 373             if (getAccount().name.equals(accountName) &&
 374                     downloadedRemotePath != null) {
 375
 376                 OCFile file = mStorageManager.getFileByPath(downloadedRemotePath);
 377                 int position = mPreviewImagePagerAdapter.getFilePosition(file);
 378                 boolean downloadWasFine = intent.getBooleanExtra(FileDownloader.EXTRA_DOWNLOAD_RESULT, false);
 379                 //boolean isOffscreen =  Math.abs((mViewPager.getCurrentItem() - position)) <= mViewPager.getOffscreenPageLimit();
 380
 381                 if (position >= 0 && intent.getAction().equals(FileDownloader.DOWNLOAD_FINISH_MESSAGE)) {
 382                     if (downloadWasFine) {
 383                         mPreviewImagePagerAdapter.updateFile(position, file);
 384
 385                     } else {
 386                         mPreviewImagePagerAdapter.updateWithDownloadError(position);
 387                     }
 388                     mPreviewImagePagerAdapter.notifyDataSetChanged();   // will trigger the creation of new fragments
 389
 390                 } else {
 391                     Log_OC.d(TAG, "Download finished, but the fragment is offscreen");
 392                 }
 393
 394             }
 395             removeStickyBroadcast(intent);
 396         }
 397
 398     }
 399
 400
 401     @Override
 402     public boolean onTouch(View v, MotionEvent event) {
 403         if (event.getAction() == MotionEvent.ACTION_UP) {
 404            toggleFullScreen();
 405         }
 406         return true;
 407     }
 408
 409
 410     private void toggleFullScreen() {
 411         ActionBar actionBar = getSupportActionBar();
 412         if (mFullScreen) {
 413             actionBar.show();
 414
 415         } else {
 416             actionBar.hide();
 417
 418         }
 419         mFullScreen = !mFullScreen;
 420     }
 421
 422     @Override
 423     protected void onAccountSet(boolean stateWasRecovered) {
 424         if (getAccount() != null) {
 425             OCFile file = getFile();
 426             /// Validate handled file  (first image to preview)
 427             if (file == null) {
 428                 throw new IllegalStateException("Instanced with a NULL OCFile");
 429             }
 430             if (!file.isImage()) {
 431                 throw new IllegalArgumentException("Non-image file passed as argument");
 432             }
 433             mStorageManager = new FileDataStorageManager(getAccount(), getContentResolver());
 434             file = mStorageManager.getFileById(file.getFileId());
 435             if (file != null) {
 436                 /// Refresh the activity according to the Account and OCFile set
 437                 setFile(file);  // reset after getting it fresh from mStorageManager
 438                 getSupportActionBar().setTitle(getFile().getFileName());
 439                 //if (!stateWasRecovered) {
 440                     initViewPager();
 441                 //}
 442
 443             } else {
 444                 // handled file not in the current Account
 445                 finish();
 446             }
 447
 448         } else {
 449             Log_OC.wtf(TAG, "onAccountChanged was called with NULL account associated!");
 450         }
 451     }
 452
 453
 454 }