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 as published by
   6  *   the Free Software Foundation, either version 2 of the License, or
   7  *   (at your option) any later version.
   8  *
   9  *   This program is distributed in the hope that it will be useful,
  10  *   but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12  *   GNU General Public License for more details.
  13  *
  14  *   You should have received a copy of the GNU General Public License
  15  *   along with this program.  If not, see <http://www.gnu.org/licenses/>.
  16  *
  17  */
  18 package com.owncloud.android.ui.preview;
  19
  20 import android.accounts.Account;
  21 import android.app.Dialog;
  22 import android.app.ProgressDialog;
  23 import android.content.ComponentName;
  24 import android.content.Context;
  25 import android.content.Intent;
  26 import android.content.ServiceConnection;
  27 import android.os.Bundle;
  28 import android.os.IBinder;
  29 import android.support.v4.view.ViewPager;
  30 import android.util.Log;
  31
  32 import com.actionbarsherlock.app.ActionBar;
  33 import com.actionbarsherlock.app.SherlockFragmentActivity;
  34 import com.actionbarsherlock.view.MenuItem;
  35 import com.owncloud.android.datamodel.DataStorageManager;
  36 import com.owncloud.android.datamodel.FileDataStorageManager;
  37 import com.owncloud.android.datamodel.OCFile;
  38 import com.owncloud.android.files.services.FileDownloader;
  39 import com.owncloud.android.files.services.FileDownloader.FileDownloaderBinder;
  40 import com.owncloud.android.files.services.FileUploader;
  41 import com.owncloud.android.files.services.FileUploader.FileUploaderBinder;
  42 import com.owncloud.android.ui.activity.FileDetailActivity;
  43 import com.owncloud.android.ui.fragment.FileDetailFragment;
  44 import com.owncloud.android.ui.fragment.FileFragment;
  45
  46 import com.owncloud.android.AccountUtils;
  47 import com.owncloud.android.R;
  48
  49 /**
  50  *  Used as an utility to preview image files contained in an ownCloud account.
  51  *
  52  *  @author David A. Velasco
  53  */
  54 public class PreviewImageActivity extends SherlockFragmentActivity implements FileFragment.ContainerActivity, ViewPager.OnPageChangeListener {
  55
  56     public static final int DIALOG_SHORT_WAIT = 0;
  57
  58     public static final String TAG = PreviewImageActivity.class.getSimpleName();
  59
  60     public static final String KEY_WAITING_TO_PREVIEW = "WAITING_TO_PREVIEW";
  61     private static final String KEY_WAITING_FOR_BINDER = "WAITING_FOR_BINDER";
  62
  63     private OCFile mFile;
  64     private OCFile mParentFolder;
  65     private Account mAccount;
  66     private DataStorageManager mStorageManager;
  67
  68     private ViewPager mViewPager;
  69     private PreviewImagePagerAdapter mPreviewImagePagerAdapter;
  70
  71     private FileDownloaderBinder mDownloaderBinder = null;
  72     private ServiceConnection mDownloadConnection, mUploadConnection = null;
  73     private FileUploaderBinder mUploaderBinder = null;
  74     private OCFile mWaitingToPreview = null;
  75
  76     private boolean mRequestWaitingForBinder;
  77
  78
  79     @Override
  80     protected void onCreate(Bundle savedInstanceState) {
  81         super.onCreate(savedInstanceState);
  82
  83         mFile = getIntent().getParcelableExtra(FileDetailFragment.EXTRA_FILE);
  84         mAccount = getIntent().getParcelableExtra(FileDetailFragment.EXTRA_ACCOUNT);
  85         if (mFile == null) {
  86             throw new IllegalStateException("Instanced with a NULL OCFile");
  87         }
  88         if (mAccount == null) {
  89             throw new IllegalStateException("Instanced with a NULL ownCloud Account");
  90         }
  91         if (!mFile.isImage()) {
  92             throw new IllegalArgumentException("Non-image file passed as argument");
  93         }
  94
  95         setContentView(R.layout.preview_image_activity);
  96
  97         ActionBar actionBar = getSupportActionBar();
  98         actionBar.setDisplayHomeAsUpEnabled(true);
  99         actionBar.setTitle(mFile.getFileName());
 100
 101         mStorageManager = new FileDataStorageManager(mAccount, getContentResolver());
 102         mParentFolder = mStorageManager.getFileById(mFile.getParentId());
 103         if (mParentFolder == null) {
 104             // should not be necessary
 105             mParentFolder = mStorageManager.getFileByPath(OCFile.PATH_SEPARATOR);
 106         }
 107
 108         if (savedInstanceState != null) {
 109             mWaitingToPreview = (OCFile) savedInstanceState.getParcelable(KEY_WAITING_TO_PREVIEW);
 110             mRequestWaitingForBinder = savedInstanceState.getBoolean(KEY_WAITING_FOR_BINDER);
 111         } else {
 112             mWaitingToPreview = null;
 113             mRequestWaitingForBinder = false;
 114         }
 115
 116         createViewPager();
 117
 118         mDownloadConnection = new PreviewImageServiceConnection();
 119         bindService(new Intent(this, FileDownloader.class), mDownloadConnection, Context.BIND_AUTO_CREATE);
 120         mUploadConnection = new PreviewImageServiceConnection();
 121         bindService(new Intent(this, FileUploader.class), mUploadConnection, Context.BIND_AUTO_CREATE);
 122
 123     }
 124
 125     private void createViewPager() {
 126         mPreviewImagePagerAdapter = new PreviewImagePagerAdapter(getSupportFragmentManager(), mParentFolder, mAccount, mStorageManager);
 127         mViewPager = (ViewPager) findViewById(R.id.fragmentPager);
 128         int position = mPreviewImagePagerAdapter.getFilePosition(mFile);
 129         position = (position >= 0) ? position : 0;
 130         mViewPager.setAdapter(mPreviewImagePagerAdapter);
 131         mViewPager.setOnPageChangeListener(this);
 132         Log.e(TAG, "Setting initial position " + position);
 133         mViewPager.setCurrentItem(position);
 134         if (position == 0 && !mFile.isDown()) {
 135             // this is necessary because mViewPager.setCurrentItem(0) just after setting the adapter does not result in a call to #onPageSelected(0)
 136             mWaitingToPreview = mFile;
 137             mRequestWaitingForBinder = true;
 138         }
 139     }
 140
 141
 142     @Override
 143     protected void onSaveInstanceState(Bundle outState) {
 144         super.onSaveInstanceState(outState);
 145         outState.putParcelable(KEY_WAITING_TO_PREVIEW, mWaitingToPreview);
 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                 Log.e(TAG, "PREVIEW_IMAGE Download service connected");
 158                 mDownloaderBinder = (FileDownloaderBinder) service;
 159                 if (mRequestWaitingForBinder) {
 160                    if (mWaitingToPreview != null) {
 161                        requestForDownload();
 162                    }
 163                    mRequestWaitingForBinder = false;
 164                 }
 165
 166             } else if (component.equals(new ComponentName(PreviewImageActivity.this, FileUploader.class))) {
 167                 Log.d(TAG, "Upload service connected");
 168                 mUploaderBinder = (FileUploaderBinder) service;
 169             } else {
 170                 return;
 171             }
 172
 173         }
 174
 175         @Override
 176         public void onServiceDisconnected(ComponentName component) {
 177             if (component.equals(new ComponentName(PreviewImageActivity.this, FileDownloader.class))) {
 178                 Log.d(TAG, "Download service suddenly disconnected");
 179                 mDownloaderBinder = null;
 180             } else if (component.equals(new ComponentName(PreviewImageActivity.this, FileUploader.class))) {
 181                 Log.d(TAG, "Upload service suddenly disconnected");
 182                 mUploaderBinder = null;
 183             }
 184         }
 185     };
 186
 187
 188     @Override
 189     public void onDestroy() {
 190         super.onDestroy();
 191         if (mDownloadConnection != null) {
 192             unbindService(mDownloadConnection);
 193             mDownloadConnection = null;
 194         }
 195         if (mUploadConnection != null) {
 196             unbindService(mUploadConnection);
 197             mUploadConnection = null;
 198         }
 199     }
 200
 201
 202     @Override
 203     public boolean onOptionsItemSelected(MenuItem item) {
 204         boolean returnValue = false;
 205
 206         switch(item.getItemId()){
 207         case android.R.id.home:
 208             backToDisplayActivity();
 209             returnValue = true;
 210             break;
 211         default:
 212                 returnValue = super.onOptionsItemSelected(item);
 213         }
 214
 215         return returnValue;
 216     }
 217
 218
 219     @Override
 220     protected void onResume() {
 221         super.onResume();
 222     }
 223
 224
 225     private void backToDisplayActivity() {
 226         /*
 227         Intent intent = new Intent(this, FileDisplayActivity.class);
 228         intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
 229         intent.putExtra(FileDetailFragment.EXTRA_FILE, mFile);
 230         intent.putExtra(FileDetailFragment.EXTRA_ACCOUNT, mAccount);
 231         startActivity(intent);
 232         */
 233         finish();
 234     }
 235
 236
 237     @Override
 238     protected Dialog onCreateDialog(int id) {
 239         Dialog dialog = null;
 240         switch (id) {
 241         case DIALOG_SHORT_WAIT: {
 242             ProgressDialog working_dialog = new ProgressDialog(this);
 243             working_dialog.setMessage(getResources().getString(
 244                     R.string.wait_a_moment));
 245             working_dialog.setIndeterminate(true);
 246             working_dialog.setCancelable(false);
 247             dialog = working_dialog;
 248             break;
 249         }
 250         default:
 251             dialog = null;
 252         }
 253         return dialog;
 254     }
 255
 256
 257     /**
 258      * {@inheritDoc}
 259      */
 260     @Override
 261     public void onFileStateChanged() {
 262         // nothing to do here!
 263     }
 264
 265
 266     /**
 267      * {@inheritDoc}
 268      */
 269     @Override
 270     public FileDownloaderBinder getFileDownloaderBinder() {
 271         return mDownloaderBinder;
 272     }
 273
 274
 275     @Override
 276     public FileUploaderBinder getFileUploaderBinder() {
 277         return mUploaderBinder;
 278     }
 279
 280
 281     @Override
 282     public void showFragmentWithDetails(OCFile file) {
 283         Intent showDetailsIntent = new Intent(this, FileDetailActivity.class);
 284         showDetailsIntent.putExtra(FileDetailFragment.EXTRA_FILE, file);
 285         showDetailsIntent.putExtra(FileDetailFragment.EXTRA_ACCOUNT, AccountUtils.getCurrentOwnCloudAccount(this));
 286         showDetailsIntent.putExtra(FileDetailActivity.EXTRA_MODE, FileDetailActivity.MODE_DETAILS);
 287         startActivity(showDetailsIntent);
 288     }
 289
 290
 291     private void requestForDownload() {
 292         Log.e(TAG, "REQUEST FOR DOWNLOAD : " + mWaitingToPreview.getFileName());
 293         if (mDownloaderBinder == null) {
 294             mRequestWaitingForBinder = true;
 295
 296         } else if (!mDownloaderBinder.isDownloading(mAccount, mWaitingToPreview)) {
 297             Intent i = new Intent(this, FileDownloader.class);
 298             i.putExtra(FileDownloader.EXTRA_ACCOUNT, mAccount);
 299             i.putExtra(FileDownloader.EXTRA_FILE, mWaitingToPreview);
 300             startService(i);
 301         }
 302         mViewPager.invalidate();
 303     }
 304
 305     @Override
 306     public void notifySuccessfulDownload(OCFile file, Intent intent, boolean success) {
 307         if (success) {
 308             if (mWaitingToPreview != null && mWaitingToPreview.equals(file)) {
 309                 mWaitingToPreview = null;
 310                 int position = mViewPager.getCurrentItem();
 311                 mPreviewImagePagerAdapter.updateFile(position, file);
 312                 Log.e(TAG, "BEFORE NOTIFY DATA SET CHANGED");
 313                 mPreviewImagePagerAdapter.notifyDataSetChanged();
 314                 Log.e(TAG, "AFTER NOTIFY DATA SET CHANGED");
 315             }
 316         }
 317     }
 318
 319
 320     /**
 321      * This method will be invoked when a new page becomes selected. Animation is not necessarily complete.
 322      *
 323      *  @param  Position        Position index of the new selected page
 324      */
 325     @Override
 326     public void onPageSelected(int position) {
 327         Log.e(TAG, "onPageSelected " + position);
 328         OCFile currentFile = mPreviewImagePagerAdapter.getFileAt(position);
 329         getSupportActionBar().setTitle(currentFile.getFileName());
 330         if (currentFile.isDown()) {
 331             mWaitingToPreview = null;
 332         } else {
 333             mWaitingToPreview = currentFile;
 334             requestForDownload();
 335         }
 336     }
 337
 338     /**
 339      * Called when the scroll state changes. Useful for discovering when the user begins dragging,
 340      * when the pager is automatically settling to the current page, or when it is fully stopped/idle.
 341      *
 342      * @param   State       The new scroll state (SCROLL_STATE_IDLE, _DRAGGING, _SETTLING
 343      */
 344     @Override
 345     public void onPageScrollStateChanged(int state) {
 346     }
 347
 348     /**
 349      * This method will be invoked when the current page is scrolled, either as part of a programmatically
 350      * initiated smooth scroll or a user initiated touch scroll.
 351      *
 352      * @param   position                Position index of the first page currently being displayed.
 353      *                                  Page position+1 will be visible if positionOffset is nonzero.
 354      *
 355      * @param   positionOffset          Value from [0, 1) indicating the offset from the page at position.
 356      * @param   positionOffsetPixels    Value in pixels indicating the offset from position.
 357      */
 358     @Override
 359     public void onPageScrolled(int position, float positionOffset, int positionOffsetPixels) {
 360     }
 361
 362 }