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