src/com/owncloud/android/ui/fragment/LocalFileListFragment.java

   1 /* ownCloud Android client application
   2  *   Copyright (C) 2011  Bartek Przybylski
   3  *   Copyright (C) 2012-2013 ownCloud Inc.
   4  *
   5  *   This program is free software: you can redistribute it and/or modify
   6  *   it under the terms of the GNU General Public License version 2,
   7  *   as published by the Free Software Foundation.
   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.fragment;
  19
  20 import java.io.File;
  21
  22 import com.owncloud.android.R;
  23 import com.owncloud.android.ui.adapter.LocalFileListAdapter;
  24 import com.owncloud.android.utils.Log_OC;
  25
  26
  27 import android.app.Activity;
  28 import android.os.Bundle;
  29 import android.os.Environment;
  30 import android.util.SparseBooleanArray;
  31 import android.view.LayoutInflater;
  32 import android.view.View;
  33 import android.view.ViewGroup;
  34 import android.widget.AdapterView;
  35 import android.widget.ImageView;
  36 import android.widget.ListView;
  37
  38
  39 /**
  40  * A Fragment that lists all files and folders in a given LOCAL path.
  41  *
  42  * @author David A. Velasco
  43  *
  44  */
  45 public class LocalFileListFragment extends ExtendedListFragment {
  46     private static final String TAG = "LocalFileListFragment";
  47
  48     /** Reference to the Activity which this fragment is attached to. For callbacks */
  49     private LocalFileListFragment.ContainerActivity mContainerActivity;
  50
  51     /** Directory to show */
  52     private File mDirectory = null;
  53
  54     /** Adapter to connect the data from the directory with the View object */
  55     private LocalFileListAdapter mAdapter = null;
  56
  57
  58     /**
  59      * {@inheritDoc}
  60      */
  61     @Override
  62     public void onAttach(Activity activity) {
  63         super.onAttach(activity);
  64         try {
  65             mContainerActivity = (ContainerActivity) activity;
  66         } catch (ClassCastException e) {
  67             throw new ClassCastException(activity.toString() + " must implement " + LocalFileListFragment.ContainerActivity.class.getSimpleName());
  68         }
  69     }
  70
  71
  72     /**
  73      * {@inheritDoc}
  74      */
  75     @Override
  76     public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
  77         Log_OC.i(TAG, "onCreateView() start");
  78         View v = super.onCreateView(inflater, container, savedInstanceState);
  79         getListView().setChoiceMode(ListView.CHOICE_MODE_MULTIPLE);
  80         disableSwipe(); // Disable pull refresh
  81         Log_OC.i(TAG, "onCreateView() end");
  82         return v;
  83     }
  84
  85
  86     /**
  87      * {@inheritDoc}
  88      */
  89     @Override
  90     public void onActivityCreated(Bundle savedInstanceState) {
  91         Log_OC.i(TAG, "onActivityCreated() start");
  92
  93         super.onCreate(savedInstanceState);
  94         mAdapter = new LocalFileListAdapter(mContainerActivity.getInitialDirectory(), getActivity());
  95         setListAdapter(mAdapter);
  96
  97         Log_OC.i(TAG, "onActivityCreated() stop");
  98     }
  99
 100     public void selectAll(){
 101         int numberOfFiles = mAdapter.getCount();
 102         for(int i = 0; i < numberOfFiles; i++){
 103             File file = (File) mAdapter.getItem(i);
 104             if (file != null) {
 105                 /// Click on a directory
 106                 if (file.isDirectory()) {
 107
 108                 } else {    /// Click on a file
 109                     getListView().setItemChecked(i, true);
 110
 111                     // notify the change to the container Activity
 112                     mContainerActivity.onFileClick(file);
 113                 }
 114             }
 115         }
 116     }
 117
 118     public void deselectAll(){
 119         /*
 120         int numberOfFiles = mAdapter.getCount();
 121         for(int i = 0; i < numberOfFiles; i++){
 122             File file = (File) mAdapter.getItem(i);
 123             if (file != null) {
 124                 /// Click on a directory
 125                 if (file.isDirectory()) {
 126
 127                 } else {    /// Click on a file
 128                     if(getListView().isItemChecked(i)){
 129                         getListView().setItemChecked(i, false);
 130                     }
 131                     // notify the change to the container Activity
 132                     mContainerActivity.onFileClick(file);
 133                 }
 134             }
 135         }*/
 136         mAdapter = new LocalFileListAdapter(mContainerActivity.getInitialDirectory(), getActivity());
 137         setListAdapter(mAdapter);
 138     }
 139
 140     /**
 141      * Checks the file clicked over. Browses inside if it is a directory. Notifies the container activity in any case.
 142      */
 143     @Override
 144     public void onItemClick(AdapterView<?> l, View v, int position, long id) {
 145         File file = (File) mAdapter.getItem(position);
 146
 147         if (file != null) {
 148             /// Click on a directory
 149             if (file.isDirectory()) {
 150                 // just local updates
 151                 listDirectory(file);
 152                 // notify the click to container Activity
 153                 mContainerActivity.onDirectoryClick(file);
 154
 155             } else {    /// Click on a file
 156                 ImageView checkBoxV = (ImageView) v.findViewById(R.id.custom_checkbox);
 157                 if (checkBoxV != null) {
 158                     if (getListView().isItemChecked(position)) {
 159                         checkBoxV.setImageResource(android.R.drawable.checkbox_on_background);
 160                     } else {
 161                         checkBoxV.setImageResource(android.R.drawable.checkbox_off_background);
 162                     }
 163                 }
 164                 // notify the change to the container Activity
 165                 mContainerActivity.onFileClick(file);
 166             }
 167
 168         } else {
 169             Log_OC.w(TAG, "Null object in ListAdapter!!");
 170         }
 171     }
 172
 173
 174     /**
 175      * Call this, when the user presses the up button
 176      */
 177     public void onNavigateUp() {
 178         File parentDir = null;
 179         if(mDirectory != null) {
 180             parentDir = mDirectory.getParentFile();  // can be null
 181         }
 182         listDirectory(parentDir);
 183     }
 184
 185
 186     /**
 187      * Use this to query the {@link File} object for the directory
 188      * that is currently being displayed by this fragment
 189      *
 190      * @return File     The currently displayed directory
 191      */
 192     public File getCurrentDirectory(){
 193         return mDirectory;
 194     }
 195
 196
 197     /**
 198      * Calls {@link LocalFileListFragment#listDirectory(File)} with a null parameter
 199      * to refresh the current directory.
 200      */
 201     public void listDirectory(){
 202         listDirectory(null);
 203     }
 204
 205
 206     /**
 207      * Lists the given directory on the view. When the input parameter is null,
 208      * it will either refresh the last known directory. list the root
 209      * if there never was a directory.
 210      *
 211      * @param directory     Directory to be listed
 212      */
 213     public void listDirectory(File directory) {
 214
 215         // Check input parameters for null
 216         if(directory == null) {
 217             if(mDirectory != null){
 218                 directory = mDirectory;
 219             } else {
 220                 directory = Environment.getExternalStorageDirectory();  // TODO be careful with the state of the storage; could not be available
 221                 if (directory == null) return; // no files to show
 222             }
 223         }
 224
 225
 226         // if that's not a directory -> List its parent
 227         if(!directory.isDirectory()){
 228             Log_OC.w(TAG, "You see, that is not a directory -> " + directory.toString());
 229             directory = directory.getParentFile();
 230         }
 231
 232         mList.clearChoices();   // by now, only files in the same directory will be kept as selected
 233         mAdapter.swapDirectory(directory);
 234         if (mDirectory == null || !mDirectory.equals(directory)) {
 235             mList.setSelectionFromTop(0, 0);
 236         }
 237         mDirectory = directory;
 238     }
 239
 240
 241     /**
 242      * Returns the fule paths to the files checked by the user
 243      *
 244      * @return      File paths to the files checked by the user.
 245      */
 246     public String[] getCheckedFilePaths() {
 247         String [] result = null;
 248         SparseBooleanArray positions = mList.getCheckedItemPositions();
 249         if (positions.size() > 0) {
 250             Log_OC.d(TAG, "Returning " + positions.size() + " selected files");
 251             result = new String[positions.size()];
 252             for (int i=0; i<positions.size(); i++) {
 253                 result[i] = ((File) mList.getItemAtPosition(positions.keyAt(i))).getAbsolutePath();
 254             }
 255         }
 256         return result;
 257     }
 258
 259
 260     /**
 261      * Interface to implement by any Activity that includes some instance of LocalFileListFragment
 262      *
 263      * @author David A. Velasco
 264      */
 265     public interface ContainerActivity {
 266
 267         /**
 268          * Callback method invoked when a directory is clicked by the user on the files list
 269          *
 270          * @param file
 271          */
 272         public void onDirectoryClick(File directory);
 273
 274         /**
 275          * Callback method invoked when a file (non directory) is clicked by the user on the files list
 276          *
 277          * @param file
 278          */
 279         public void onFileClick(File file);
 280
 281
 282         /**
 283          * Callback method invoked when the parent activity is fully created to get the directory to list firstly.
 284          *
 285          * @return  Directory to list firstly. Can be NULL.
 286          */
 287         public File getInitialDirectory();
 288
 289     }
 290
 291
 292 }