summaryrefslogtreecommitdiff
path: root/framework/Web/UI/WebControls/TRepeater.php
blob: af82dfe9dfcac0471f93537bc428159d1f42b8ab (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
<?php
/**
 * TRepeater class file
 *
 * @author Qiang Xue <qiang.xue@gmail.com>
 * @link http://www.pradosoft.com/
 * @copyright Copyright &copy; 2005 PradoSoft
 * @license http://www.pradosoft.com/license/
 * @version $Revision: $  $Date: $
 * @package System.Web.UI.WebControls
 */

Prado::using('System.Web.UI.WebControls.TDataBoundControl');

/**
 * TRepeater class
 *
 * TRepeater displays its content defined in templates repeatedly based on
 * the <b>DataSource</b> property. The <b>DataSource</b> property only accepts
 * objects that implement Iterator or IteratorAggregate interface. For convenience,
 * it also accepts an array.
 *
 * The <b>HeaderTemplate</b> property specifies the content template
 * that will be displayed at the beginning, while <b>FooterTemplate</b> at the last.
 * If present, these two templates will only be rendered when <b>DataSource</b> is set (not null).
 * If the <b>DataSource</b> contains item data, then for each item,
 * the content defined by <b>ItemTemplate</b> will be generated and displayed once.
 * If <b>AlternatingItemTemplate</b> is not empty, then the corresponding content will
 * be displayed alternatively with that in <b>ItemTemplate</b>. The content in
 * <b>SeparatorTemplate</b>, if not empty, will be displayed between two items.
 * These templates can contain static text, controls and special tags.
 *
 * Note, the templates are only parsed and instantiated upon <b>OnDataBinding</b>
 * event which is raised by calling <b>TControl::dataBind()</b> method. You may
 * call this method during <b>OnInit</b> or <b>OnLoad</b> life cycles.
 *
 * You can retrive the repeated contents by <b>Items</b>.
 * The number of repeated items is given by <b>ItemCount</b>.
 *
 * @author Qiang Xue <qiang.xue@gmail.com>
 * @version $Revision: $  $Date: $
 * @package System.Web.UI.WebControls
 * @since 3.0
 */
class TRepeater extends TDataBoundControl implements INamingContainer
{
	const CACHE_EXPIRY=18000;
	private $_itemTemplate='';
	private $_alternatingItemTemplate='';
	private $_headerTemplate='';
	private $_footerTemplate='';
	private $_separatorTemplate='';
	private $_emptyTemplate='';
	private $_items=null;
	private $_header=null;
	private $_footer=null;
	private static $_templates=array();

	/**
	 * @return string the template string for the item
	 */
	public function getItemTemplate()
	{
		return $this->_itemTemplate;
	}

	/**
	 * Sets the template string for the item
	 * @param string the item template
	 */
	public function setItemTemplate($value)
	{
		$this->_itemTemplate=$value;
	}

	/**
	 * @return string the template string when there are no items
	 */
	public function getEmptyTemplate()
	{
		return $this->_emptyTemplate;
	}

	/**
	 * Sets the template string when there are no items
	 * @param string the empty template
	 */
	public function setEmptyTemplate($value)
	{
		$this->_emptyTemplate=$value;
	}
	/**
	 * @return string the alternative template string for the item
	 */
	public function getAlternatingItemTemplate()
	{
		return $this->_alternatingItemTemplate;
	}

	/**
	 * Sets the alternative template string for the item
	 * @param string the alternative item template
	 */
	public function setAlternatingItemTemplate($value)
	{
		$this->_alternatingItemTemplate=$value;
	}

	/**
	 * @return string the header template string
	 */
	public function getHeaderTemplate()
	{
		return $this->_headerTemplate;
	}

	/**
	 * Sets the header template.
	 * The template will be parsed immediately.
	 * @param string the header template
	 */
	public function setHeaderTemplate($value)
	{
		$this->_headerTemplate=$value;
	}

	/**
	 * @return string the footer template string
	 */
	public function getFooterTemplate()
	{
		return $this->_footerTemplate;
	}

	/**
	 * Sets the footer template.
	 * The template will be parsed immediately.
	 * @param string the footer template
	 */
	public function setFooterTemplate($value)
	{
		$this->_footerTemplate=$value;
	}

	/**
	 * @return string the separator template string
	 */
	public function getSeparatorTemplate()
	{
		return $this->_separatorTemplate;
	}

	/**
	 * Sets the separator template string
	 * @param string the separator template
	 */
	public function setSeparatorTemplate($value)
	{
		$this->_separatorTemplate=$value;
	}

	/**
	 * @return TRepeaterItem the header item
	 */
	public function getHeader()
	{
		return $this->_header;
	}

	/**
	 * @return TRepeaterItem the footer item
	 */
	public function getFooter()
	{
		return $this->_footer;
	}

	/**
	 * @return array list of TRepeaterItem control
	 */
	public function getItems()
	{
		if(!$this->_items)
			$this->_items=new TList;
		return $this->_items;
	}

	protected function createItem($itemIndex,$itemType)
	{
		return new TRepeaterItem($itemIndex,$itemType);
	}

	protected function initializeItem($item)
	{
		$tplContent='';
		switch($item->getItemType())
		{
			case 'Header': $tplContent=$this->_headerTemplate; break;
			case 'Footer': $tplContent=$this->_footerTemplate; break;
			case 'Item': $tplContent=$this->_itemTemplate; break;
			case 'Separator': $tplContent=$this->_separatorTemplate; break;
			case 'AlternatingItem': $tplContent=$this->_alternatingItemTemplate==='' ? $this->_itemTemplate : $this->_alternatingItemTemplate; break;
			case 'SelectedItem':
			case 'EditItem':
			default:
				break;
		}
		if($tplContent!=='')
		{
			$key=md5($tplContent);
			$contextPath=$this->getTemplateControl()->getTemplate()->getContextPath();
			if(($cache=$this->getApplication()->getCache())!==null)
			{
				if(($template=$cache->get($key))===null)
				{
					$template=new TTemplate($tplContent,$contextPath);
					$cache->set($key,$template,self::CACHE_EXPIRY);
				}
			}
			else
			{
				if(isset(self::$_templates[$key]))
					$template=self::$_templates[$key];
				else
				{
					$template=new TTemplate($tplContent,$contextPath);
					self::$_templates[$key]=$template;
				}
			}
			$this->getControls()->add($item);
			$template->instantiateIn($item);
		}
	}

	private function createItemInternal($itemIndex,$itemType,$dataBind,$dataItem)
	{
		$item=$this->createItem($itemIndex,$itemType);
		$this->initializeItem($item);
		$param=new TRepeaterItemEventParameter($item);
		if($dataBind)
		{
			$item->setDataItem($dataItem);
			$this->onItemCreated($param);
			$item->dataBind();
			$this->onItemDataBound($param);
			$item->setDataItem(null);
		}
		else
			$this->onItemCreated($param);
		return $item;
	}

	protected function createChildControls()
	{
		$this->getControls()->clear();
		$items=$this->getItems();
		$items->clear();
		$this->_header=null;
		$this->_footer=null;
		if(($itemCount=$this->getViewState('ItemCount',null))!==null)
		{
			if($this->_headerTemplate!=='')
				$this->_header=$this->createItemInternal(-1,'Header',false,null);
			$hasSeparator=$this->_separatorTemplate!=='';
			for($i=0;$i<$itemCount;++$i)
			{
				if($hasSeparator && $i>0)
					$this->createItemInternal($i-1,'Separator',false,null);
				$itemType=$i%2==0?'Item':'AlternatingItem';
				$items->add($this->createItemInternal($i,$itemType,false,null));
			}
			if($this->_footerTemplate!=='')
				$this->_footer=$this->createItemInternal(-1,'Footer',false,null);
		}
		$this->clearChildState();
	}

	/**
	 * Performs databinding to populate list items from data source.
	 * This method is invoked by dataBind().
	 * You may override this function to provide your own way of data population.
	 * @param Traversable the data
	 */
	protected function performDataBinding($data)
	{
		$this->getControls()->clear();
		$this->clearChildState();
		$items=$this->getItems();
		$items->clear();
		$itemIndex=0;
		if($data!==null)
		{
			if($this->_headerTemplate!=='')
				$this->_header=$this->createItemInternal(-1,'Header',true,null);
			$hasSeparator=$this->_separatorTemplate!=='';
			foreach($data as $dataItem)
			{
				if($hasSeparator && $itemIndex>0)
					$this->createItemInternal($itemIndex-1,'Separator',true,null);
				$itemType=$itemIndex%2==0?'Item':'AlternatingItem';
				$items->add($this->createItemInternal($itemIndex,$itemType,true,$dataItem));
				$itemIndex++;
			}
			if($this->_footerTemplate!=='')
				$this->_footer=$this->createItemInternal(-1,'Footer',true,null);
			$this->setViewState('ItemCount',$itemIndex,0);
		}
		else
			$this->setViewState('ItemCount',$itemIndex,-1);
		$this->setChildControlsCreated(true);
	}

	/**
	 * Raises <b>OnItemCreated</b> event.
	 * This method is invoked after a repeater item is created.
	 * You may override this method to provide customized event handling.
	 * Be sure to call parent's implementation so that
	 * event handlers have chance to respond to the event.
	 * The TRepeaterItem control responsible for the event
	 * can be determined from the event parameter's <b>item</b>
	 * field.
	 * @param TRepeaterItemEventParameter event parameter
	 */
	protected function onItemCreated($param)
	{
		$this->raiseEvent('ItemCreated',$this,$param);
	}

	/**
	 * Handles <b>OnBubbleEvent</b>.
	 * This method overrides parent's implementation to handle
	 * <b>OnItemCommand</b> event that is bubbled from
	 * TRepeaterItem child controls.
	 * This method should only be used by control developers.
	 * @param TControl the sender of the event
	 * @param TEventParameter event parameter
	 * @return boolean whether the event bubbling should stop here.
	 */
	protected function onBubbleEvent($sender,$param)
	{
		if($param instanceof TRepeaterCommandEventParameter)
		{
			$this->onItemCommand($param);
			return true;
		}
		else
			return false;
	}

	/**
	 * Raises <b>OnItemCommand</b> event.
	 * This method is invoked after a button control in
	 * a template raises <b>OnCommand</b> event.
	 * You may override this method to provide customized event handling.
	 * Be sure to call parent's implementation so that
	 * event handlers have chance to respond to the event.
	 * The TRepeaterItem control responsible for the event
	 * can be determined from the event parameter's <b>item</b>
	 * field. The initial sender of the <b>OnCommand</b> event
	 * is in <b>source</b> field. The command name and parameter
	 * are in <b>name</b> and <b>parameter</b> fields, respectively.
	 * @param TRepeaterCommandEventParameter event parameter
	 */
	protected function onItemCommand($param)
	{
		$this->raiseEvent('ItemCommand',$this,$param);
	}

	protected function onItemDataBound($param)
	{
		$this->raiseEvent('ItemDataBound',$this,$param);
	}
}

/**
 * TRepeaterItemEventParameter class
 *
 * TRepeaterItemEventParameter encapsulates the parameter data for <b>OnItemCreated</b>
 * event of TRepeater controls.
 *
 * @author Qiang Xue <qiang.xue@gmail.com>
 * @version v1.0, last update on 2004/08/13 21:44:52
 * @package System.Web.UI.WebControls
 */
class TRepeaterItemEventParameter extends TEventParameter
{
	/**
	 * The TRepeaterItem control responsible for the event.
	 * @var TRepeaterItem
	 */
	public $_item=null;

	public function __construct(TRepeaterItem $item)
	{
		$this->_item=$item;
	}

	public function getItem()
	{
		return $this->_item;
	}
}

/**
 * TRepeaterCommandEventParameter class
 *
 * TRepeaterCommandEventParameter encapsulates the parameter data for <b>OnItemCommand</b>
 * event of TRepeater controls.
 *
 * @author Qiang Xue <qiang.xue@gmail.com>
 * @version v1.0, last update on 2004/08/13 21:44:52
 * @package System.Web.UI.WebControls
 */
class TRepeaterCommandEventParameter extends TCommandEventParameter
{
	/**
	 * The TRepeaterItem control responsible for the event.
	 * @var TRepeaterItem
	 */
	public $_item=null;
	/**
	 * The control originally raises the <b>Command</b> event.
	 * @var TControl
	 */
	public $_source=null;

	public function __construct($item,$source,TCommandEventParameter $param)
	{
		$this->_item=$item;
		$this->_source=$source;
		parent::__construct($param->getCommandName(),$param->getCommandParameter());
	}

	public function getItem()
	{
		return $this->_item;
	}

	public function getCommandSource()
	{
		return $this->_source;
	}
}

class TRepeaterItem extends TControl implements INamingContainer
{
	/**
	 * index of the data item in the Items collection of repeater
	 */
	private $_itemIndex='';
	/**
	 * type of the TRepeaterItem
	 * @var string
	 */
	private $_itemType='';
	/**
	 * value of the data item
	 * @var mixed
	 */
	private $_dataItem=null;

	public function __construct($itemIndex,$itemType)
	{
		$this->_itemIndex=$itemIndex;
		$this->_itemType=TPropertyValue::ensureEnum($itemType,'Header','Footer','Item','AlternatingItem','SelectedItem','EditItem','Separator','Pager');
	}

	public function getItemType()
	{
		return $this->_itemType;
	}

	public function getItemIndex()
	{
		return $this->_itemIndex;
	}

	public function getDataItem()
	{
		return $this->_dataItem;
	}

	public function setDataItem($value)
	{
		$this->_dataItem=$value;
	}

	/**
	 * Handles <b>OnBubbleEvent</b>.
	 * This method overrides parent's implementation to bubble
	 * <b>OnItemCommand</b> event if an <b>OnCommand</b>
	 * event is bubbled from a child control.
	 * This method should only be used by control developers.
	 * @param TControl the sender of the event
	 * @param TEventParameter event parameter
	 * @return boolean whether the event bubbling should stop here.
	 */
	protected function onBubbleEvent($sender,$param)
	{
		if($param instanceof TCommandEventParameter)
		{
			$this->raiseBubbleEvent($this,new TRepeaterCommandEventParameter($this,$sender,$param));
			return true;
		}
		else
			return false;
	}
}

?>