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  • Committer: Tim Marston
  • Date: 2013-12-08 18:43:52 UTC
  • Revision ID: tim@ed.am-20131208184352-0giww6zoy58bx07h
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src/am/ed/importcontacts/FileChooser.java
 
1
/*
 
2
 * FileChooser.java
 
3
 *
 
4
 * Copyright (C) 2010 Tim Marston <tim@ed.am>
 
5
 *
 
6
 * This file is part of the Import Contacts program (hereafter referred
 
7
 * to as "this program").  For more information, see
 
8
 * http://ed.am/dev/android/import-contacts
 
9
 *
 
10
 * This program is free software: you can redistribute it and/or modify
 
11
 * it under the terms of the GNU General Public License as published by
 
12
 * the Free Software Foundation, either version 3 of the License, or
 
13
 * (at your option) any later version.
 
14
 *
 
15
 * This program is distributed in the hope that it will be useful,
 
16
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 
17
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 
18
 * GNU General Public License for more details.
 
19
 *
 
20
 * You should have received a copy of the GNU General Public License
 
21
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
22
 */
 
23
 
 
24
package am.ed.importcontacts;
 
25
 
 
26
import java.io.File;
 
27
import java.io.FileFilter;
 
28
import java.io.IOException;
 
29
import java.util.ArrayList;
 
30
import java.util.Collections;
 
31
import java.util.Comparator;
 
32
 
 
33
import android.app.AlertDialog;
 
34
import android.app.Dialog;
 
35
import android.content.Context;
 
36
import android.content.DialogInterface;
 
37
import android.os.Environment;
 
38
import android.view.LayoutInflater;
 
39
import android.view.View;
 
40
import android.view.View.OnClickListener;
 
41
import android.view.ViewGroup;
 
42
import android.widget.AdapterView;
 
43
import android.widget.AdapterView.OnItemClickListener;
 
44
import android.widget.ArrayAdapter;
 
45
import android.widget.Button;
 
46
import android.widget.ImageView;
 
47
import android.widget.ListView;
 
48
import android.widget.TextView;
 
49
 
 
50
public class FileChooser
 
51
{
 
52
        // pick an existing directory
 
53
        public final static int MODE_DIR = 1;
 
54
 
 
55
        // pick an existing file
 
56
        public final static int MODE_FILE = 2;
 
57
 
 
58
 
 
59
        private Dialog _dialog;
 
60
 
 
61
        // mode
 
62
        private int _mode = MODE_DIR;
 
63
 
 
64
        // ok was pressed
 
65
        boolean _ok = false;
 
66
 
 
67
        // working path
 
68
        private String _path;
 
69
 
 
70
        // selected filename
 
71
        private String _filename;
 
72
 
 
73
        // enforce extension (in file-mode)
 
74
        private String[] _extensions;
 
75
 
 
76
        // path to secretly prefix all paths with
 
77
        private String _path_prefix = "";
 
78
 
 
79
        private Context _context;
 
80
        private ArrayList< RowItem > _items;
 
81
        private DialogInterface.OnDismissListener _on_dismiss_listener;
 
82
 
 
83
        // class that represents a row in the list
 
84
        private class RowItem implements Comparable< RowItem >
 
85
        {
 
86
                private String _name;
 
87
                private boolean _directory;
 
88
 
 
89
                public RowItem( String name, boolean directory )
 
90
                {
 
91
                        _name = name;
 
92
                        _directory = directory;
 
93
                }
 
94
 
 
95
                public String getName()
 
96
                {
 
97
                        return _name;
 
98
                }
 
99
 
 
100
                public boolean isDirectory()
 
101
                {
 
102
                        return _directory;
 
103
                }
 
104
 
 
105
                @Override
 
106
                public int compareTo( RowItem that )
 
107
                {
 
108
                        if( this._directory && !that._directory )
 
109
                                return -1;
 
110
                        else if( !this._directory && that._directory )
 
111
                                return 1;
 
112
                        else
 
113
                                return this._name.compareToIgnoreCase( that._name );
 
114
                }
 
115
        }
 
116
 
 
117
        // class to manage our list of RowItems
 
118
        private class RowItemAdapter extends ArrayAdapter< RowItem >
 
119
        {
 
120
                private ArrayList< RowItem > _items;
 
121
 
 
122
                public RowItemAdapter( Context context, int textview_resource_id,
 
123
                        ArrayList< RowItem > items )
 
124
                {
 
125
                        super( context, textview_resource_id, items );
 
126
                        _items = items;
 
127
                }
 
128
 
 
129
                @Override
 
130
                public View getView( int position, View convert_view, ViewGroup parent )
 
131
                {
 
132
                        View view = convert_view;
 
133
                        if( view == null ) {
 
134
                                LayoutInflater factory = LayoutInflater.from( _context );
 
135
                                view = factory.inflate(  R.layout.filechooser_row, null );
 
136
                        }
 
137
                        RowItem rowitem = _items.get( position );
 
138
                        if( rowitem != null ) {
 
139
                                ( (TextView)view.findViewById( R.id.name ) )
 
140
                                        .setText( rowitem.getName() );
 
141
                                ( (ImageView)view.findViewById( R.id.icon ) ).setVisibility(
 
142
                                        rowitem.isDirectory()? View.VISIBLE : View.GONE );
 
143
                        }
 
144
                        return view;
 
145
                }
 
146
        }
 
147
 
 
148
        @SuppressWarnings( "serial" )
 
149
        class InvalidPathPrefixException extends RuntimeException
 
150
        {
 
151
        }
 
152
 
 
153
 
 
154
 
 
155
        // constructor
 
156
        public FileChooser( Context context )
 
157
        {
 
158
                _context = context;
 
159
        }
 
160
 
 
161
        public void setMode( int mode )
 
162
        {
 
163
                _mode = mode;
 
164
        }
 
165
 
 
166
        public void setPath( String path )
 
167
        {
 
168
                _path = cleanUpPath( path );
 
169
                File file = new File( _path_prefix + path.trim() );
 
170
 
 
171
                // path and filename
 
172
                if( file.isFile() ) {
 
173
                        _path = _path.substring( 0, _path.length() - 1 );
 
174
                        _filename = _path.substring( _path.lastIndexOf( '/' ) + 1 );
 
175
                        _path = _path.substring( 0, _path.length() - _filename.length() );
 
176
                }
 
177
 
 
178
                // else, treat as just a path
 
179
                else
 
180
                        _filename = "";
 
181
        }
 
182
 
 
183
        public void setExtensions( String[] extensions )
 
184
        {
 
185
                _extensions = extensions;
 
186
        }
 
187
 
 
188
        // set dismiss listener
 
189
        public void setDismissListener(
 
190
                DialogInterface.OnDismissListener on_dismiss_listener )
 
191
        {
 
192
                _on_dismiss_listener = on_dismiss_listener;
 
193
        }
 
194
 
 
195
        // set the path prefix
 
196
        public void setPathPrefix( String path_prefix )
 
197
        {
 
198
                // set to cleaned-up path, with trailing '/' removed so that it can be
 
199
                // trivially pre-pended to a cleaned-up path
 
200
                _path_prefix = cleanUpPath( path_prefix );
 
201
                _path_prefix = _path_prefix.substring( 0, _path_prefix.length() - 1 );
 
202
        }
 
203
 
 
204
        public boolean getOk()
 
205
        {
 
206
                return _ok;
 
207
        }
 
208
 
 
209
        public String getPath()
 
210
        {
 
211
                return _path + _filename;
 
212
        }
 
213
 
 
214
        public Dialog onCreateDialog()
 
215
        {
 
216
                // custom layout in an AlertDialog
 
217
                LayoutInflater factory = LayoutInflater.from( _context );
 
218
                final View dialogView = factory.inflate(
 
219
                        R.layout.filechooser, null );
 
220
 
 
221
                // wire up buttons
 
222
                ( (Button)dialogView.findViewById( R.id.ok ) )
 
223
                        .setOnClickListener( _fileChooserButtonListener );
 
224
                ( (ListView)dialogView.findViewById( R.id.list ) )
 
225
                        .setOnItemClickListener( _fileChooserItemClickListener );
 
226
 
 
227
                // return dialog
 
228
                Dialog dialog = new AlertDialog.Builder( _context )
 
229
                        .setTitle( " " )
 
230
                        .setView( dialogView )
 
231
                        .create();
 
232
                dialog.setOnDismissListener( _on_dismiss_listener );
 
233
                return dialog;
 
234
        }
 
235
 
 
236
        private OnClickListener _fileChooserButtonListener = new OnClickListener() {
 
237
                public void onClick( View view )
 
238
                {
 
239
                        switch( view.getId() )
 
240
                        {
 
241
                        case R.id.ok:
 
242
                                // close dialog and free (don't keep a reference)
 
243
                                _ok = true;
 
244
                                _dialog.dismiss();
 
245
                                break;
 
246
                        }
 
247
                }
 
248
        };
 
249
 
 
250
        private OnItemClickListener _fileChooserItemClickListener =
 
251
                        new OnItemClickListener() {
 
252
                public void onItemClick( AdapterView< ? > adapter_view, View view,
 
253
                        int position, long id )
 
254
                {
 
255
                        RowItem rowitem = _items.get( position );
 
256
 
 
257
                        // handle directory changes
 
258
                        if( rowitem.isDirectory() )
 
259
                        {
 
260
                                String dirname = rowitem.getName();
 
261
                                if( dirname.equals( ".." ) )
 
262
                                        strtipLastFilepartFromPath();
 
263
                                else
 
264
                                        _path += dirname + "/";
 
265
                                _filename = "";
 
266
 
 
267
                                updateList();
 
268
                        }
 
269
 
 
270
                        // handle file selections
 
271
                        else
 
272
                        {
 
273
                                _filename = rowitem.getName();
 
274
                                updateCurrentSelection();
 
275
                        }
 
276
                }
 
277
        };
 
278
 
 
279
        public void onPrepareDialog( Context context, Dialog dialog )
 
280
        {
 
281
                // set up reference to dialog
 
282
                _dialog = dialog;
 
283
                _context = context;
 
284
 
 
285
                // reset "ok"
 
286
                _ok = false;
 
287
 
 
288
                // pick text based on mode
 
289
                int title = 0, current = 0;
 
290
                switch( _mode ) {
 
291
                case MODE_DIR:
 
292
                        title = R.string.filechooser_title_dir;
 
293
                        current = R.string.filechooser_current_dir;
 
294
                        break;
 
295
                case MODE_FILE:
 
296
                        title = R.string.filechooser_title_file;
 
297
                        current = R.string.filechooser_current_file;
 
298
                        break;
 
299
                }
 
300
                dialog.setTitle( title );
 
301
                ( (TextView)dialog.findViewById( R.id.current ) )
 
302
                        .setText( _context.getString(  current ) );
 
303
 
 
304
                // clear filename in directory mode
 
305
                if( _mode == MODE_DIR )
 
306
                        _filename = "";
 
307
 
 
308
                // set root path icon
 
309
                ( (ImageView)_dialog.findViewById( R.id.icon ) )
 
310
                        .setImageResource( pathIcon( cleanUpPath( _path_prefix ) ) );
 
311
 
 
312
                // setup current-path-specific stuff
 
313
                updateList();
 
314
        }
 
315
 
 
316
        public static String cleanUpPath( String path )
 
317
        {
 
318
                path = path.trim();
 
319
 
 
320
                // ensure it starts and ends in a '/'
 
321
                if( !path.startsWith( "/" ) ) path = "/" + path;
 
322
                if( !path.endsWith( "/" ) ) path += "/";
 
323
 
 
324
                return path;
 
325
        }
 
326
 
 
327
        public static int pathIcon( String path )
 
328
        {
 
329
                // get sdcard path
 
330
                String sdcard_path;
 
331
                try {
 
332
                        sdcard_path = Environment.getExternalStorageDirectory()
 
333
                                .getCanonicalPath();
 
334
                        if( sdcard_path.charAt( sdcard_path.length() - 1 ) != '/' )
 
335
                                sdcard_path += "/";
 
336
                }
 
337
                catch( IOException e ) {
 
338
                        sdcard_path = null;
 
339
                }
 
340
 
 
341
                // special paths
 
342
                if( sdcard_path != null && path.equals( sdcard_path ) )
 
343
                        return R.drawable.sdcard;
 
344
 
 
345
                // default
 
346
                return R.drawable.directory;
 
347
        }
 
348
 
 
349
        public String prettyPrint( String full_path, boolean return_full )
 
350
        {
 
351
                String path = full_path;
 
352
 
 
353
                // get sdcard path
 
354
                String sdcard_path;
 
355
                try {
 
356
                        sdcard_path = Environment.getExternalStorageDirectory()
 
357
                                .getCanonicalPath();
 
358
                        if( sdcard_path.charAt( sdcard_path.length() - 1 ) != '/' )
 
359
                                sdcard_path += "/";
 
360
                }
 
361
                catch( IOException e ) {
 
362
                        sdcard_path = null;
 
363
                }
 
364
 
 
365
                // special names
 
366
                if( sdcard_path != null && path.equals( sdcard_path ) )
 
367
                        return " " + _context.getString( R.string.filechooser_path_sdcard );
 
368
 
 
369
                // remove prefix, if present
 
370
                if( path.startsWith( _path_prefix + "/" ) )
 
371
                        path = path.substring( _path_prefix.length() );
 
372
 
 
373
                // unless path is "/", strip trailing "/"
 
374
                if( path.length() > 1 && path.endsWith( "/" ) )
 
375
                        path = path.substring( 0, path.length() - 1 );
 
376
 
 
377
                // if full path not required, strip off preceding directories
 
378
                if( !return_full ) {
 
379
                        int idx = path.lastIndexOf( "/" );
 
380
                        if( idx != -1 ) path = path.substring( idx + 1 );
 
381
                }
 
382
 
 
383
                return path;
 
384
        }
 
385
 
 
386
        protected void strtipLastFilepartFromPath()
 
387
        {
 
388
                int at = _path.lastIndexOf( '/', _path.length() - 2 );
 
389
                if( at != -1 ) _path = _path.substring( 0, at + 1 );
 
390
        }
 
391
 
 
392
        protected void updateList()
 
393
        {
 
394
                // reset item list
 
395
                _items = new ArrayList< RowItem >();
 
396
 
 
397
                // open directory (and ensure _path is a directory)
 
398
                File dir = new File( _path_prefix + _path );
 
399
                while( !dir.isDirectory() ) {
 
400
                        if( _path == "/" )
 
401
                                throw new InvalidPathPrefixException();
 
402
                        strtipLastFilepartFromPath();
 
403
                        dir = new File( _path_prefix + _path );
 
404
                }
 
405
 
 
406
                // add ".."?
 
407
                if( !_path.equals( "/" ) )
 
408
                        _items.add( new RowItem( "..", true ) );
 
409
 
 
410
                // get directories
 
411
                class DirFilter implements FileFilter {
 
412
                        public boolean accept( File file ) {
 
413
                                return file.isDirectory() && file.getName().charAt( 0 ) != '.';
 
414
                        }
 
415
                }
 
416
                File[] files = dir.listFiles( new DirFilter() );
 
417
                if( files != null )
 
418
                        for( int i = 0; i < files.length; i++ )
 
419
                                _items.add( new RowItem( files[ i ].getName(), true ) );
 
420
 
 
421
                // get files
 
422
                if( _mode == MODE_FILE )
 
423
                {
 
424
                        class VCardFilter implements FileFilter {
 
425
                                public boolean accept( File file ) {
 
426
                                        if( file.isDirectory() || file.getName().startsWith( "." ) )
 
427
                                                return false;
 
428
                                        String filename = file.getName().toLowerCase();
 
429
                                        for( int i = 0; i < _extensions.length; i++ )
 
430
                                                if( filename.endsWith( "." + _extensions[ i ] ) )
 
431
                                                        return true;
 
432
                                        return false;
 
433
                                }
 
434
                        }
 
435
                        files = dir.listFiles( new VCardFilter() );
 
436
                        if( files != null )
 
437
                                for( int i = 0; i < files.length; i++ )
 
438
                                        _items.add( new RowItem( files[ i ].getName(), false ) );
 
439
                }
 
440
 
 
441
                // sort
 
442
                class RowItemSorter implements Comparator< RowItem > {
 
443
                        @Override
 
444
                        public int compare( RowItem lhs, RowItem rhs ) {
 
445
                                return lhs.compareTo( rhs );
 
446
                        }
 
447
                }
 
448
                Collections.sort( _items, new RowItemSorter() );
 
449
 
 
450
                // setup directory list
 
451
                ( (ListView)_dialog.findViewById( R.id.list ) ).setAdapter(
 
452
                        new RowItemAdapter( _context, R.layout.filechooser_row,
 
453
                                _items ) );
 
454
 
 
455
                updateCurrentSelection();
 
456
        }
 
457
 
 
458
        private void updateCurrentSelection()
 
459
        {
 
460
                // set current path
 
461
                ( (TextView)_dialog.findViewById( R.id.path ) ).setText(
 
462
                        prettyPrint( _path_prefix + _path + _filename, true ) );
 
463
 
 
464
                // enable/disable ok button
 
465
                if( _mode == MODE_FILE )
 
466
                        _dialog.findViewById( R.id.ok ).setEnabled( _filename != "" );
 
467
                else
 
468
                        _dialog.findViewById( R.id.ok ).setEnabled( true );
 
469
        }
 
470
 
 
471
}