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.FileDataStorageManager;
  40 import com.owncloud.android.datamodel.OCFile;
  41 import com.owncloud.android.files.services.FileDownloader;
  42 import com.owncloud.android.files.services.FileDownloader.FileDownloaderBinder;
  43 import com.owncloud.android.files.services.FileUploader;
  44 import com.owncloud.android.files.services.FileUploader.FileUploaderBinder;
  45 import com.owncloud.android.ui.activity.FileActivity;
  46 import com.owncloud.android.ui.activity.FileDisplayActivity;
  47 import com.owncloud.android.ui.dialog.LoadingDialog;
  48 import com.owncloud.android.ui.fragment.FileFragment;
  49
  50 import com.owncloud.android.Log_OC;
  51 import com.owncloud.android.R;
  52
  53 /**
  54  *  Holds a swiping galley where image files contained in an ownCloud directory are shown
  55  *
  56  *  @author David A. Velasco
  57  */
  58 public class PreviewImageActivity extends FileActivity implements FileFragment.ContainerActivity, ViewPager.OnPageChangeListener, OnTouchListener {
  59
  60     public static final int DIALOG_SHORT_WAIT = 0;
  61
  62     public static final String TAG = PreviewImageActivity.class.getSimpleName();
  63
  64     public static final String KEY_WAITING_TO_PREVIEW = "WAITING_TO_PREVIEW";
  65     private static final String KEY_WAITING_FOR_BINDER = "WAITING_FOR_BINDER";
  66
  67     private static final String DIALOG_WAIT_TAG = "DIALOG_WAIT";
  68
  69     private FileDataStorageManager mStorageManager;
  70
  71     private ViewPager mViewPager;
  72     private PreviewImagePagerAdapter mPreviewImagePagerAdapter;
  73
  74     private FileDownloaderBinder mDownloaderBinder = null;
  75     private ServiceConnection mDownloadConnection, mUploadConnection = null;
  76     private FileUploaderBinder mUploaderBinder = null;
  77
  78     private boolean mRequestWaitingForBinder;
  79
  80     private DownloadFinishReceiver mDownloadFinishReceiver;
  81
  82     private boolean mFullScreen;
  83
  84     private String mDownloadAddedMessage;
  85     private String mDownloadFinishMessage;
  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         FileDownloader downloader = new FileDownloader();
 107         mDownloadAddedMessage = downloader.getDownloadAddedMessage();
 108         mDownloadFinishMessage= downloader.getDownloadFinishMessage();
 109     }
 110
 111     private void initViewPager() {
 112         // get parent from path
 113         String parentPath = getFile().getRemotePath().substring(0, getFile().getRemotePath().lastIndexOf(getFile().getFileName()));
 114         OCFile parentFolder = mStorageManager.getFileByPath(parentPath);
 115         //OCFile parentFolder = mStorageManager.getFileById(getFile().getParentId());
 116         if (parentFolder == null) {
 117             // should not be necessary
 118             parentFolder = mStorageManager.getFileByPath(OCFile.ROOT_PATH);
 119         }
 120         mPreviewImagePagerAdapter = new PreviewImagePagerAdapter(getSupportFragmentManager(), parentFolder, getAccount(), mStorageManager);
 121         mViewPager = (ViewPager) findViewById(R.id.fragmentPager);
 122         int position = mPreviewImagePagerAdapter.getFilePosition(getFile());
 123         position = (position >= 0) ? position : 0;
 124         mViewPager.setAdapter(mPreviewImagePagerAdapter);
 125         mViewPager.setOnPageChangeListener(this);
 126         mViewPager.setCurrentItem(position);
 127         if (position == 0 && !getFile().isDown()) {
 128             // this is necessary because mViewPager.setCurrentItem(0) just after setting the adapter does not result in a call to #onPageSelected(0)
 129             mRequestWaitingForBinder = true;
 130         }
 131     }
 132
 133
 134     @Override
 135     public void onStart() {
 136         super.onStart();
 137         mDownloadConnection = new PreviewImageServiceConnection();
 138         bindService(new Intent(this, FileDownloader.class), mDownloadConnection, Context.BIND_AUTO_CREATE);
 139         mUploadConnection = new PreviewImageServiceConnection();
 140         bindService(new Intent(this, FileUploader.class), mUploadConnection, Context.BIND_AUTO_CREATE);
 141     }
 142
 143     @Override
 144     protected void onSaveInstanceState(Bundle outState) {
 145         super.onSaveInstanceState(outState);
 146         outState.putBoolean(KEY_WAITING_FOR_BINDER, mRequestWaitingForBinder);
 147     }
 148
 149
 150     /** Defines callbacks for service binding, passed to bindService() */
 151     private class PreviewImageServiceConnection implements ServiceConnection {
 152
 153         @Override
 154         public void onServiceConnected(ComponentName component, IBinder service) {
 155
 156             if (component.equals(new ComponentName(PreviewImageActivity.this, FileDownloader.class))) {
 157                 mDownloaderBinder = (FileDownloaderBinder) service;
 158                 if (mRequestWaitingForBinder) {
 159                     mRequestWaitingForBinder = false;
 160                     Log_OC.d(TAG, "Simulating reselection of current page after connection of download binder");
 161                     onPageSelected(mViewPager.getCurrentItem());
 162                 }
 163
 164             } else if (component.equals(new ComponentName(PreviewImageActivity.this, FileUploader.class))) {
 165                 Log_OC.d(TAG, "Upload service connected");
 166                 mUploaderBinder = (FileUploaderBinder) service;
 167             } else {
 168                 return;
 169             }
 170
 171         }
 172
 173         @Override
 174         public void onServiceDisconnected(ComponentName component) {
 175             if (component.equals(new ComponentName(PreviewImageActivity.this, FileDownloader.class))) {
 176                 Log_OC.d(TAG, "Download service suddenly disconnected");
 177                 mDownloaderBinder = null;
 178             } else if (component.equals(new ComponentName(PreviewImageActivity.this, FileUploader.class))) {
 179                 Log_OC.d(TAG, "Upload service suddenly disconnected");
 180                 mUploaderBinder = null;
 181             }
 182         }
 183     };
 184
 185
 186     @Override
 187     public void onStop() {
 188         super.onStop();
 189         if (mDownloadConnection != null) {
 190             unbindService(mDownloadConnection);
 191             mDownloadConnection = null;
 192         }
 193         if (mUploadConnection != null) {
 194             unbindService(mUploadConnection);
 195             mUploadConnection = null;
 196         }
 197     }
 198
 199
 200     @Override
 201     public void onDestroy() {
 202         super.onDestroy();
 203     }
 204
 205
 206     @Override
 207     public boolean onOptionsItemSelected(MenuItem item) {
 208         boolean returnValue = false;
 209
 210         switch(item.getItemId()){
 211         case android.R.id.home:
 212             backToDisplayActivity();
 213             returnValue = true;
 214             break;
 215         default:
 216                 returnValue = super.onOptionsItemSelected(item);
 217         }
 218
 219         return returnValue;
 220     }
 221
 222
 223     @Override
 224     protected void onResume() {
 225         super.onResume();
 226         //Log.e(TAG, "ACTIVITY, ONRESUME");
 227         mDownloadFinishReceiver = new DownloadFinishReceiver();
 228
 229         IntentFilter filter = new IntentFilter(mDownloadFinishMessage);
 230         filter.addAction(mDownloadAddedMessage);
 231         registerReceiver(mDownloadFinishReceiver, filter);
 232     }
 233
 234     @Override
 235     protected void onPostResume() {
 236         //Log.e(TAG, "ACTIVITY, ONPOSTRESUME");
 237         super.onPostResume();
 238     }
 239
 240     @Override
 241     public void onPause() {
 242         super.onPause();
 243         unregisterReceiver(mDownloadFinishReceiver);
 244         mDownloadFinishReceiver = null;
 245     }
 246
 247
 248     private void backToDisplayActivity() {
 249         finish();
 250     }
 251
 252     /**
 253      * Show loading dialog
 254      */
 255     public void showLoadingDialog() {
 256         // Construct dialog
 257         LoadingDialog loading = new LoadingDialog(getResources().getString(R.string.wait_a_moment));
 258         FragmentManager fm = getSupportFragmentManager();
 259         FragmentTransaction ft = fm.beginTransaction();
 260         loading.show(ft, DIALOG_WAIT_TAG);
 261
 262     }
 263
 264     /**
 265      * Dismiss loading dialog
 266      */
 267     public void dismissLoadingDialog(){
 268         Fragment frag = getSupportFragmentManager().findFragmentByTag(DIALOG_WAIT_TAG);
 269       if (frag != null) {
 270           LoadingDialog loading = (LoadingDialog) frag;
 271             loading.dismiss();
 272         }
 273     }
 274
 275     /**
 276      * {@inheritDoc}
 277      */
 278     @Override
 279     public void onFileStateChanged() {
 280         // nothing to do here!
 281     }
 282
 283
 284     /**
 285      * {@inheritDoc}
 286      */
 287     @Override
 288     public FileDownloaderBinder getFileDownloaderBinder() {
 289         return mDownloaderBinder;
 290     }
 291
 292
 293     @Override
 294     public FileUploaderBinder getFileUploaderBinder() {
 295         return mUploaderBinder;
 296     }
 297
 298
 299     @Override
 300     public void showDetails(OCFile file) {
 301         Intent showDetailsIntent = new Intent(this, FileDisplayActivity.class);
 302         showDetailsIntent.setAction(FileDisplayActivity.ACTION_DETAILS);
 303         showDetailsIntent.putExtra(FileActivity.EXTRA_FILE, file);
 304         showDetailsIntent.putExtra(FileActivity.EXTRA_ACCOUNT, AccountUtils.getCurrentOwnCloudAccount(this));
 305         startActivity(showDetailsIntent);
 306         int pos = mPreviewImagePagerAdapter.getFilePosition(file);
 307         file = mPreviewImagePagerAdapter.getFileAt(pos);
 308
 309     }
 310
 311
 312     private void requestForDownload(OCFile file) {
 313         if (mDownloaderBinder == null) {
 314             Log_OC.d(TAG, "requestForDownload called without binder to download service");
 315
 316         } else if (!mDownloaderBinder.isDownloading(getAccount(), file)) {
 317             Intent i = new Intent(this, FileDownloader.class);
 318             i.putExtra(FileDownloader.EXTRA_ACCOUNT, getAccount());
 319             i.putExtra(FileDownloader.EXTRA_FILE, file);
 320             startService(i);
 321         }
 322     }
 323
 324     /**
 325      * This method will be invoked when a new page becomes selected. Animation is not necessarily complete.
 326      *
 327      *  @param  Position        Position index of the new selected page
 328      */
 329     @Override
 330     public void onPageSelected(int position) {
 331         if (mDownloaderBinder == null) {
 332             mRequestWaitingForBinder = true;
 333
 334         } else {
 335             OCFile currentFile = mPreviewImagePagerAdapter.getFileAt(position);
 336             getSupportActionBar().setTitle(currentFile.getFileName());
 337             if (!currentFile.isDown()) {
 338                 if (!mPreviewImagePagerAdapter.pendingErrorAt(position)) {
 339                     requestForDownload(currentFile);
 340                 }
 341             }
 342         }
 343     }
 344
 345     /**
 346      * Called when the scroll state changes. Useful for discovering when the user begins dragging,
 347      * when the pager is automatically settling to the current page. when it is fully stopped/idle.
 348      *
 349      * @param   State       The new scroll state (SCROLL_STATE_IDLE, _DRAGGING, _SETTLING
 350      */
 351     @Override
 352     public void onPageScrollStateChanged(int state) {
 353     }
 354
 355     /**
 356      * This method will be invoked when the current page is scrolled, either as part of a programmatically
 357      * initiated smooth scroll or a user initiated touch scroll.
 358      *
 359      * @param   position                Position index of the first page currently being displayed.
 360      *                                  Page position+1 will be visible if positionOffset is nonzero.
 361      *
 362      * @param   positionOffset          Value from [0, 1) indicating the offset from the page at position.
 363      * @param   positionOffsetPixels    Value in pixels indicating the offset from position.
 364      */
 365     @Override
 366     public void onPageScrolled(int position, float positionOffset, int positionOffsetPixels) {
 367     }
 368
 369
 370     /**
 371      * Class waiting for broadcast events from the {@link FielDownloader} service.
 372      *
 373      * Updates the UI when a download is started or finished, provided that it is relevant for the
 374      * folder displayed in the gallery.
 375      */
 376     private class DownloadFinishReceiver extends BroadcastReceiver {
 377         @Override
 378         public void onReceive(Context context, Intent intent) {
 379             String accountName = intent.getStringExtra(FileDownloader.ACCOUNT_NAME);
 380             String downloadedRemotePath = intent.getStringExtra(FileDownloader.EXTRA_REMOTE_PATH);
 381             if (getAccount().name.equals(accountName) &&
 382                     downloadedRemotePath != null) {
 383
 384                 OCFile file = mStorageManager.getFileByPath(downloadedRemotePath);
 385                 int position = mPreviewImagePagerAdapter.getFilePosition(file);
 386                 boolean downloadWasFine = intent.getBooleanExtra(FileDownloader.EXTRA_DOWNLOAD_RESULT, false);
 387                 //boolean isOffscreen =  Math.abs((mViewPager.getCurrentItem() - position)) <= mViewPager.getOffscreenPageLimit();
 388
 389                 if (position >= 0 && intent.getAction().equals(mDownloadFinishMessage)) {
 390                     if (downloadWasFine) {
 391                         mPreviewImagePagerAdapter.updateFile(position, file);
 392
 393                     } else {
 394                         mPreviewImagePagerAdapter.updateWithDownloadError(position);
 395                     }
 396                     mPreviewImagePagerAdapter.notifyDataSetChanged();   // will trigger the creation of new fragments
 397
 398                 } else {
 399                     Log_OC.d(TAG, "Download finished, but the fragment is offscreen");
 400                 }
 401
 402             }
 403             removeStickyBroadcast(intent);
 404         }
 405
 406     }
 407
 408
 409     @Override
 410     public boolean onTouch(View v, MotionEvent event) {
 411         if (event.getAction() == MotionEvent.ACTION_UP) {
 412            toggleFullScreen();
 413         }
 414         return true;
 415     }
 416
 417
 418     private void toggleFullScreen() {
 419         ActionBar actionBar = getSupportActionBar();
 420         if (mFullScreen) {
 421             actionBar.show();
 422
 423         } else {
 424             actionBar.hide();
 425
 426         }
 427         mFullScreen = !mFullScreen;
 428     }
 429
 430     @Override
 431     protected void onAccountSet(boolean stateWasRecovered) {
 432         if (getAccount() != null) {
 433             OCFile file = getFile();
 434             /// Validate handled file  (first image to preview)
 435             if (file == null) {
 436                 throw new IllegalStateException("Instanced with a NULL OCFile");
 437             }
 438             if (!file.isImage()) {
 439                 throw new IllegalArgumentException("Non-image file passed as argument");
 440             }
 441             mStorageManager = new FileDataStorageManager(getAccount(), getContentResolver());
 442
 443             // Update file according to DB file, if it is possible
 444             if (file.getFileId() > FileDataStorageManager.ROOT_PARENT_ID)
 445                 file = mStorageManager.getFileById(file.getFileId());
 446
 447             if (file != null) {
 448                 /// Refresh the activity according to the Account and OCFile set
 449                 setFile(file);  // reset after getting it fresh from mStorageManager
 450                 getSupportActionBar().setTitle(getFile().getFileName());
 451                 //if (!stateWasRecovered) {
 452                     initViewPager();
 453                 //}
 454
 455             } else {
 456                 // handled file not in the current Account
 457                 finish();
 458             }
 459
 460         } else {
 461             Log_OC.wtf(TAG, "onAccountChanged was called with NULL account associated!");
 462         }
 463     }
 464
 465
 466 }