/android/import-contacts

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