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root / drupal7 / sites / all / modules / date / date_api / date_api_elements.inc @ db9ffd17

1
<?php
2

    
3
/**
4
 * @file
5
 * Date API elements themes and validation.
6
 * This file is only included during the edit process to reduce memory usage.
7
 */
8

    
9
/**
10
 * Implements hook_element_info().
11
 *
12
 * Parameters for date form elements, designed to have sane defaults so any
13
 * or all can be omitted.
14
 *
15
 * Fill the element #default_value with a date in datetime format,
16
 * (YYYY-MM-DD HH:MM:SS), adjusted to the proper local timezone.
17
 *
18
 * NOTE - Converting a date stored in the database from UTC to the local zone
19
 * and converting it back to UTC before storing it is not handled by this
20
 * element and must be done in pre-form and post-form processing!!
21
 *
22
 * The date_select element will create a collection of form elements, with a
23
 * separate select or textfield for each date part. The whole collection will
24
 * get reformatted back to a date value of the requested type during validation.
25
 *
26
 * The date_text element will create a textfield that can contain a whole
27
 * date or any part of a date as text. The user input value will be re-formatted
28
 * back into a date value of the requested type during validation.
29
 *
30
 * The date_timezone element will create a drop-down selector to pick a
31
 * timezone name.
32
 *
33
 * The date_year_range element will create two textfields (for users with
34
 * JavaScript enabled they will appear as drop-down selectors with an option
35
 * for custom text entry) to pick a range of years that will be passed to form
36
 * submit handlers as a single string (e.g., -3:+3).
37
 *
38
 * #date_timezone
39
 *   The local timezone to be used to create this date.
40
 *
41
 * #date_format
42
 *   A format string that describes the format and order of date parts to
43
 *   display in the edit form for this element. This makes it possible
44
 *   to show date parts in a custom order, or to leave some of them out.
45
 *   Be sure to add 'A' or 'a' to get an am/pm selector. Defaults to the
46
 *   short site default format.
47
 *
48
 * #date_label_position
49
 *   Handling option for date part labels, like 'Year', 'Month', and 'Day',
50
 *   can be 'above' the date part, 'within' it, or 'none', default is 'above' .
51
 *   The 'within' option shows the label as the first option in a select list
52
 *   or the default value for an empty textfield, taking up less screen space.
53
 *
54
 * #date_increment
55
 *   Increment minutes and seconds by this amount, default is 1.
56
 *
57
 * #date_year_range
58
 *   The number of years to go back and forward in a year selector,
59
 *   default is -3:+3 (3 back and 3 forward).
60
 *
61
 * #date_text_parts
62
 *   Array of date parts that should use textfields instead of selects
63
 *   i.e. array('year') will format the year as a textfield and other
64
 *   date parts as drop-down selects.
65
 */
66
function _date_api_element_info() {
67
  $date_base = array(
68
    '#input' => TRUE, '#tree' => TRUE,
69
    '#date_timezone' => date_default_timezone(),
70
    '#date_flexible' => 0,
71
    '#date_format' => variable_get('date_format_short', 'm/d/Y - H:i'),
72
    '#date_text_parts' => array(),
73
    '#date_increment' => 1,
74
    '#date_year_range' => '-3:+3',
75
    '#date_label_position' => 'above',
76
  );
77
  if (module_exists('ctools')) {
78
    $date_base['#pre_render'] = array('ctools_dependent_pre_render');
79
  }
80
  $type['date_select'] = array_merge($date_base, array(
81
    '#process' => array('date_select_element_process'),
82
    '#theme_wrappers' => array('date_select'),
83
    '#value_callback' => 'date_select_element_value_callback',
84
  ));
85
  $type['date_text'] = array_merge($date_base, array(
86
    '#process' => array('date_text_element_process'),
87
    '#theme_wrappers' => array('date_text'),
88
    '#value_callback' => 'date_text_element_value_callback',
89
  ));
90
  $type['date_timezone'] = array(
91
    '#input' => TRUE, '#tree' => TRUE,
92
    '#process' => array('date_timezone_element_process'),
93
    '#theme_wrappers' => array('date_text'),
94
    '#value_callback' => 'date_timezone_element_value_callback',
95
  );
96
  $type['date_year_range'] = array(
97
    '#input' => TRUE,
98
    '#process' => array('date_year_range_element_process'),
99
    '#value_callback' => 'date_year_range_element_value_callback',
100
    '#element_validate' => array('date_year_range_validate'),
101
  );
102
  return $type;
103
}
104

    
105
/**
106
 * Create a date object from a datetime string value.
107
 */
108
function date_default_date($element) {
109
  $granularity = date_format_order($element['#date_format']);
110
  $default_value = $element['#default_value'];
111
  $format = DATE_FORMAT_DATETIME;
112

    
113
  // The text and popup widgets might return less than a full datetime string.
114
  if (strlen($element['#default_value']) < 19) {
115
    switch (strlen($element['#default_value'])) {
116
      case 16:
117
        $format = 'Y-m-d H:i';
118
        break;
119
      case 13:
120
        $format = 'Y-m-d H';
121
        break;
122
      case 10:
123
        $format = 'Y-m-d';
124
        break;
125
      case 7:
126
        $format = 'Y-m';
127
        break;
128
      case 4:
129
        $format = 'Y';
130
        break;
131
    }
132
  }
133
  $date = new DateObject($default_value, $element['#date_timezone'], $format);
134
  if (is_object($date)) {
135
    $date->limitGranularity($granularity);
136
    if ($date->validGranularity($granularity, $element['#date_flexible'])) {
137
      date_increment_round($date, $element['#date_increment']);
138
    }
139
    return $date;
140
  }
141
  return NULL;
142
}
143

    
144
/**
145
 * Process callback which creates a date_year_range form element.
146
 */
147
function date_year_range_element_process($element, &$form_state, $form) {
148
  // Year range is stored in the -3:+3 format, but collected as two separate
149
  // textfields.
150
  $element['years_back'] = array(
151
    '#type' => 'textfield',
152
    '#title' => t('Starting year'),
153
    '#default_value' => $element['#value']['years_back'],
154
    '#size' => 10,
155
    '#maxsize' => 10,
156
    '#attributes' => array('class' => array('select-list-with-custom-option', 'back')),
157
    '#description' => t('Enter a relative value (-9, +9) or an absolute year such as 2015.'),
158
  );
159
  $element['years_forward'] = array(
160
    '#type' => 'textfield',
161
    '#title' => t('Ending year'),
162
    '#default_value' => $element['#value']['years_forward'],
163
    '#size' => 10,
164
    '#maxsize' => 10,
165
    '#attributes' => array('class' => array('select-list-with-custom-option', 'forward')),
166
    '#description' => t('Enter a relative value (-9, +9) or an absolute year such as 2015.'),
167
  );
168

    
169
  $element['#tree'] = TRUE;
170
  $element['#attached']['js'][] = drupal_get_path('module', 'date_api') . '/date_year_range.js';
171

    
172
  $context = array(
173
   'form' => $form,
174
  );
175
  drupal_alter('date_year_range_process', $element, $form_state, $context);
176

    
177
  return $element;
178
}
179

    
180
/**
181
 * Element value callback for the date_year_range form element.
182
 */
183
function date_year_range_element_value_callback($element, $input = FALSE, &$form_state = array()) {
184
  // Convert the element's default value from a string to an array (to match
185
  // what we will get from the two textfields when the form is submitted).
186
  if ($input === FALSE) {
187
    list($years_back, $years_forward) = explode(':', $element['#default_value']);
188
    return array(
189
      'years_back' => $years_back,
190
      'years_forward' => $years_forward,
191
    );
192
  }
193
}
194

    
195
/**
196
 * Element validation function for the date_year_range form element.
197
 */
198
function date_year_range_validate(&$element, &$form_state) {
199
  // Recombine the two submitted form values into the -3:+3 format we will
200
  // validate and save.
201
  $year_range_submitted = drupal_array_get_nested_value($form_state['values'], $element['#parents']);
202
  $year_range = $year_range_submitted['years_back'] . ':' . $year_range_submitted['years_forward'];
203
  drupal_array_set_nested_value($form_state['values'], $element['#parents'], $year_range);
204
  if (!date_range_valid($year_range)) {
205
    form_error($element['years_back'], t('Starting year must be in the format -9, or an absolute year such as 1980.'));
206
    form_error($element['years_forward'], t('Ending year must be in the format +9, or an absolute year such as 2030.'));
207
  }
208
}
209

    
210
/**
211
 * Element value callback for date_timezone element.
212
 */
213
function date_timezone_element_value_callback($element, $input = FALSE, &$form_state = array()) {
214
  $return = '';
215
  if ($input !== FALSE) {
216
    $return = $input;
217
  }
218
  elseif (!empty($element['#default_value'])) {
219
    $return = array('timezone' => $element['#default_value']);
220
  }
221
  return $return;
222
}
223

    
224
/**
225
 * Creates a timezone form element.
226
 *
227
 * @param array $element
228
 *   The timezone form element.
229
 *
230
 * @return array
231
 *   the timezone form element
232
 */
233
function date_timezone_element_process($element, &$form_state, $form) {
234
  if (date_hidden_element($element)) {
235
    return $element;
236
  }
237

    
238
  $element['#tree'] = TRUE;
239
  $label = theme('date_part_label_timezone', array('part_type' => 'select', 'element' => $element));
240
  $element['timezone'] = array(
241
    '#type' => 'select',
242
    '#title' => $label,
243
    '#title_display' => $element['#date_label_position'] == 'above' ? 'before' : 'invisible',
244
    '#options' => date_timezone_names($element['#required']),
245
    '#value' => $element['#value'],
246
    '#weight' => $element['#weight'],
247
    '#required' => $element['#required'],
248
    '#theme' => 'date_select_element',
249
    '#theme_wrappers' => array('form_element'),
250
  );
251
  if (isset($element['#element_validate'])) {
252
    array_push($element['#element_validate'], 'date_timezone_validate');
253
  }
254
  else {
255
    $element['#element_validate'] = array('date_timezone_validate');
256
  }
257

    
258
  $context = array(
259
   'form' => $form,
260
  );
261
  drupal_alter('date_timezone_process', $element, $form_state, $context);
262

    
263
  return $element;
264
}
265

    
266
/**
267
 *  Validation for timezone input
268
 *
269
 *  Move the timezone value from the nested field back to the original field.
270
 */
271
function date_timezone_validate($element, &$form_state) {
272
  if (date_hidden_element($element)) {
273
    return;
274
  }
275

    
276
  form_set_value($element, $element['#value']['timezone'], $form_state);
277
}
278

    
279
/**
280
 * Element value callback for date_text element.
281
 */
282
function date_text_element_value_callback($element, $input = FALSE, &$form_state = array()) {
283
  $return = array('date' => '');
284
  $date = NULL;
285

    
286
  // Normal input from submitting the form element.
287
  // Check is_array() to skip the string input values created by Views pagers.
288
  // Those string values, if present, should be interpreted as empty input.
289
  if ($input != FALSE && is_array($input)) {
290
    $return = $input;
291
    $date = date_text_input_date($element, $input);
292
  }
293
  // No input? Try the default value.
294
  elseif (!empty($element['#default_value'])) {
295
    $date = date_default_date($element);
296
  }
297
  if (date_is_date($date)) {
298
    $return['date'] = date_format_date($date, 'custom', $element['#date_format']);
299
  }
300
  return $return;
301
}
302

    
303
/**
304
 * Text date input form.
305
 *
306
 * Display all or part of a date in a single textfield.
307
 *
308
 * The exact parts displayed in the field are those in #date_granularity.
309
 * The display of each part comes from #date_format.
310
 *
311
 */
312
function date_text_element_process($element, &$form_state, $form) {
313
  if (date_hidden_element($element)) {
314
    return $element;
315
  }
316

    
317
  $element['#tree'] = TRUE;
318
  $element['#theme_wrappers'] = array('date_text');
319
  $element['date']['#value'] = $element['#value']['date'];
320
  $element['date']['#type'] = 'textfield';
321
  $element['date']['#weight'] = !empty($element['date']['#weight']) ? $element['date']['#weight'] : $element['#weight'];
322
  $element['date']['#attributes'] = array('class' => isset($element['#attributes']['class']) ? $element['#attributes']['class'] += array('date-date') : array('date-date'));
323
  $now = date_example_date();
324
  $element['date']['#title'] = t('Date');
325
  $element['date']['#title_display'] = 'invisible';
326
  $element['date']['#description'] = ' ' . t('Format: @date', array('@date' => date_format_date(date_example_date(), 'custom', $element['#date_format'])));
327
  $element['date']['#ajax'] = !empty($element['#ajax']) ? $element['#ajax'] : FALSE;
328

    
329
  // Keep the system from creating an error message for the sub-element.
330
  // We'll set our own message on the parent element.
331
  // $element['date']['#required'] = $element['#required'];
332
  $element['date']['#theme'] = 'date_textfield_element';
333
  if (isset($element['#element_validate'])) {
334
    array_push($element['#element_validate'], 'date_text_validate');
335
  }
336
  else {
337
    $element['#element_validate'] = array('date_text_validate');
338
  }
339
  if (!empty($element['#force_value'])) {
340
    $element['date']['#value'] = $element['date']['#default_value'];
341
  }
342

    
343
  $context = array(
344
   'form' => $form,
345
  );
346
  drupal_alter('date_text_process', $element, $form_state, $context);
347

    
348
  return $element;
349
}
350

    
351
/**
352
 *  Validation for text input.
353
 *
354
 * When used as a Views widget, the validation step always gets triggered,
355
 * even with no form submission. Before form submission $element['#value']
356
 * contains a string, after submission it contains an array.
357
 *
358
 */
359
function date_text_validate($element, &$form_state) {
360
  if (date_hidden_element($element)) {
361
    return;
362
  }
363

    
364
  if (is_string($element['#value'])) {
365
    return;
366
  }
367
  $input_exists = NULL;
368
  $input = drupal_array_get_nested_value($form_state['values'], $element['#parents'], $input_exists);
369

    
370
  drupal_alter('date_text_pre_validate', $element, $form_state, $input);
371

    
372
  $label = !empty($element['#date_title']) ? $element['#date_title'] : (!empty($element['#title']) ? $element['#title'] : '');
373
  $date = date_text_input_date($element, $input);
374

    
375
  // If the field has errors, display them.
376
  // If something was input but there is no date, the date is invalid.
377
  // If the field is empty and required, set error message and return.
378
  $error_field = implode('][', $element['#parents']);
379
  if (empty($date) || !empty($date->errors)) {
380
    if (is_object($date) && !empty($date->errors)) {
381
      $message = t('The value input for field %field is invalid:', array('%field' => $label));
382
      $message .= '<br />' . implode('<br />', $date->errors);
383
      form_set_error($error_field, $message);
384
      return;
385
    }
386
    if (!empty($element['#required'])) {
387
      $message = t('A valid date is required for %title.', array('%title' => $label));
388
      form_set_error($error_field, $message);
389
      return;
390
    }
391
    // Fall through, some other error.
392
    if (!empty($input['date'])) {
393
      form_error($element, t('%title is invalid.', array('%title' => $label)));
394
      return;
395
    }
396
  }
397
  $value = !empty($date) ? $date->format(DATE_FORMAT_DATETIME) : NULL;
398
  form_set_value($element, $value, $form_state);
399
}
400

    
401
/**
402
 * Helper function for creating a date object out of user input.
403
 */
404
function date_text_input_date($element, $input) {
405
  if (empty($input) || !is_array($input) || !array_key_exists('date', $input) || empty($input['date'])) {
406
    return NULL;
407
  }
408
  $granularity = date_format_order($element['#date_format']);
409
  $date = new DateObject($input['date'], $element['#date_timezone'], $element['#date_format']);
410
  if (is_object($date)) {
411
    $date->limitGranularity($granularity);
412
    if ($date->validGranularity($granularity, $element['#date_flexible'])) {
413
      date_increment_round($date, $element['#date_increment']);
414
    }
415
    return $date;
416
  }
417
  return NULL;
418
}
419

    
420
/**
421
 * Element value callback for date_select element.
422
 */
423
function date_select_element_value_callback($element, $input = FALSE, &$form_state = array()) {
424
  $return = array('year' => '', 'month' => '', 'day' => '', 'hour' => '', 'minute' => '', 'second' => '');
425
  $date = NULL;
426
  if ($input !== FALSE) {
427
    $return = $input;
428
    $date = date_select_input_date($element, $input);
429
  }
430
  elseif (!empty($element['#default_value'])) {
431
    $date = date_default_date($element);
432
  }
433
  $granularity = date_format_order($element['#date_format']);
434
  $formats = array('year' => 'Y', 'month' => 'n', 'day' => 'j', 'hour' => 'H', 'minute' => 'i', 'second' => 's');
435
  foreach ($granularity as $field) {
436
    if ($field != 'timezone') {
437
      $return[$field] = date_is_date($date) ? $date->format($formats[$field]) : '';
438
    }
439
  }
440
  return $return;
441
}
442

    
443
/**
444
 * Flexible date/time drop-down selector.
445
 *
446
 * Splits date into a collection of date and time sub-elements, one
447
 * for each date part. Each sub-element can be either a textfield or a
448
 * select, based on the value of ['#date_settings']['text_fields'].
449
 *
450
 * The exact parts displayed in the field are those in #date_granularity.
451
 * The display of each part comes from ['#date_settings']['format'].
452
 *
453
 */
454
function date_select_element_process($element, &$form_state, $form) {
455
  if (date_hidden_element($element)) {
456
    return $element;
457
  }
458

    
459
  $date = NULL;
460
  $granularity = date_format_order($element['#date_format']);
461

    
462
  if (is_array($element['#default_value'])) {
463
    $date = date_select_input_date($element, $element['#default_value']);
464
  }
465
  elseif (!empty($element['#default_value'])) {
466
    $date = date_default_date($element);
467
  }
468

    
469
  $element['#tree'] = TRUE;
470
  $element['#theme_wrappers'] = array('date_select');
471

    
472
  $element += (array) date_parts_element($element, $date, $element['#date_format']);
473

    
474
  // Store a hidden value for all date parts not in the current display.
475
  $granularity = date_format_order($element['#date_format']);
476
  $formats = array('year' => 'Y', 'month' => 'n', 'day' => 'j', 'hour' => 'H', 'minute' => 'i', 'second' => 's');
477
  foreach (date_nongranularity($granularity) as $field) {
478
    if ($field != 'timezone') {
479
      $element[$field] = array(
480
        '#type' => 'value',
481
        '#value' => 0,
482
      );
483
    }
484
  }
485
  if (isset($element['#element_validate'])) {
486
    array_push($element['#element_validate'], 'date_select_validate');
487
  }
488
  else {
489
    $element['#element_validate'] = array('date_select_validate');
490
  }
491

    
492
  $context = array(
493
   'form' => $form,
494
  );
495
  drupal_alter('date_select_process', $element, $form_state, $context);
496

    
497
  return $element;
498
}
499

    
500
/**
501
 * Creates form elements for one or more date parts.
502
 *
503
 * Get the order of date elements from the provided format.
504
 * If the format order omits any date parts in the granularity, alter the
505
 * granularity array to match the format, then flip the $order array
506
 * to get the position for each element. Then iterate through the
507
 * elements and create a sub-form for each part.
508
 *
509
 * @param array $element
510
 *   The date element.
511
 * @param object $date
512
 *   The date object.
513
 * @param string $format
514
 *   A date format string.
515
 *
516
 * @return array
517
 *   The form array for the submitted date parts.
518
 */
519
function date_parts_element($element, $date, $format) {
520
  $granularity = date_format_order($format);
521
  $sub_element = array('#granularity' => $granularity);
522
  $order = array_flip($granularity);
523

    
524
  $hours_format  = strpos(strtolower($element['#date_format']), 'a') ? 'g': 'G';
525
  $month_function  = strpos($element['#date_format'], 'F') !== FALSE ? 'date_month_names' : 'date_month_names_abbr';
526
  $count = 0;
527
  $increment = min(intval($element['#date_increment']), 1);
528

    
529
  // Allow empty value as option if date is not required or there is no date.
530
  $part_required = (bool) $element['#required'] && is_object($date);
531
  foreach ($granularity as $field) {
532
    $part_type = in_array($field, $element['#date_text_parts']) ? 'textfield' : 'select';
533
    $sub_element[$field] = array(
534
      '#weight' => $order[$field],
535
      '#required' => $part_required,
536
      '#attributes' => array('class' => isset($element['#attributes']['class']) ? $element['#attributes']['class'] += array('date-' . $field) : array('date-' . $field)),
537
      '#ajax' => !empty($element['#ajax']) ? $element['#ajax'] : FALSE,
538
    );
539
    switch ($field) {
540
      case 'year':
541
        $range = date_range_years($element['#date_year_range'], $date);
542
        $min_year = $range[0];
543
        $max_year = $range[1];
544

    
545
        $sub_element[$field]['#default_value'] = is_object($date) ? $date->format('Y') : '';
546
        if ($part_type == 'select') {
547
          $sub_element[$field]['#options'] = drupal_map_assoc(date_years($min_year, $max_year, $part_required));
548
        }
549
        break;
550
      case 'month':
551
        $sub_element[$field]['#default_value'] = is_object($date) ? $date->format('n') : '';
552
        if ($part_type == 'select') {
553
          $sub_element[$field]['#options'] = $month_function($part_required);
554
        }
555
        break;
556
      case 'day':
557
        $sub_element[$field]['#default_value'] = is_object($date) ? $date->format('j') : '';
558
        if ($part_type == 'select') {
559
          $sub_element[$field]['#options'] = drupal_map_assoc(date_days($part_required));
560
        }
561
        break;
562
      case 'hour':
563
        $sub_element[$field]['#default_value'] = is_object($date) ? $date->format($hours_format) : '';
564
        if ($part_type == 'select') {
565
          $sub_element[$field]['#options'] = drupal_map_assoc(date_hours($hours_format, $part_required));
566
        }
567
        $sub_element[$field]['#prefix'] = theme('date_part_hour_prefix', $element);
568
        break;
569
      case 'minute':
570
        $sub_element[$field]['#default_value'] = is_object($date) ? $date->format('i') : '';
571
        if ($part_type == 'select') {
572
          $sub_element[$field]['#options'] = drupal_map_assoc(date_minutes('i', $part_required, $element['#date_increment']));
573
        }
574
        $sub_element[$field]['#prefix'] = theme('date_part_minsec_prefix', $element);
575
        break;
576
      case 'second':
577
        $sub_element[$field]['#default_value'] = is_object($date) ? $date->format('s') : '';
578
        if ($part_type == 'select') {
579
          $sub_element[$field]['#options'] = drupal_map_assoc(date_seconds('s', $part_required, $element['#date_increment']));
580
        }
581
        $sub_element[$field]['#prefix'] = theme('date_part_minsec_prefix', $element);
582
        break;
583
    }
584

    
585
    // Add handling for the date part label.
586
    $label = theme('date_part_label_' . $field, array('part_type' => $part_type, 'element' => $element));
587
    if (in_array($field, $element['#date_text_parts'])) {
588
      $sub_element[$field]['#type'] = 'textfield';
589
      $sub_element[$field]['#theme'] = 'date_textfield_element';
590
      $sub_element[$field]['#size'] = 7;
591
      $sub_element[$field]['#title'] = $label;
592
      $sub_element[$field]['#title_display'] = in_array($element['#date_label_position'], array('within', 'none')) ? 'invisible' : 'before';
593
      if ($element['#date_label_position'] == 'within') {
594
        if (!empty($sub_element[$field]['#options']) && is_array($sub_element[$field]['#options'])) {
595
          $sub_element[$field]['#options'] = array(
596
            '-' . $label => '-' . $label) + $sub_element[$field]['#options'];
597
        }
598
        if (empty($sub_element[$field]['#default_value'])) {
599
          $sub_element[$field]['#default_value'] = '-' . $label;
600
        }
601
      }
602
    }
603
    else {
604
      $sub_element[$field]['#type'] = 'select';
605
      $sub_element[$field]['#theme'] = 'date_select_element';
606
      $sub_element[$field]['#title'] = $label;
607
      $sub_element[$field]['#title_display'] = in_array($element['#date_label_position'], array('within', 'none')) ? 'invisible' : 'before';
608
      if ($element['#date_label_position'] == 'within') {
609
        $sub_element[$field]['#options'] = array(
610
          '' => '-' . $label) + $sub_element[$field]['#options'];
611
      }
612
    }
613
  }
614

    
615
  // Views exposed filters are treated as submitted even if not,
616
  // so force the #default value in that case. Make sure we set
617
  // a default that is in the option list.
618
  if (!empty($element['#force_value'])) {
619
    $options = $sub_element[$field]['#options'];
620
    $default = !empty($sub_element[$field]['#default_value']) ? $sub_element[$field]['#default_value'] : array_shift($options);
621
    $sub_element[$field]['#value'] = $default;
622
  }
623

    
624
  if (($hours_format == 'g' || $hours_format == 'h') && date_has_time($granularity)) {
625
    $label = theme('date_part_label_ampm', array('part_type' => 'ampm', 'element' => $element));
626
    $sub_element['ampm'] = array(
627
      '#type' => 'select',
628
      '#theme' => 'date_select_element',
629
      '#title' => $label,
630
      '#title_display' => in_array($element['#date_label_position'], array('within', 'none')) ? 'invisible' : 'before',
631
      '#default_value' => is_object($date) ? (date_format($date, 'G') >= 12 ? 'pm' : 'am') : '',
632
      '#options' => drupal_map_assoc(date_ampm($part_required)),
633
      '#required' => $part_required,
634
      '#weight' => 8,
635
      '#attributes' => array('class' => array('date-ampm')),
636
    );
637
    if ($element['#date_label_position'] == 'within') {
638
      $sub_element['ampm']['#options'] = array('' => '-' . $label) + $sub_element['ampm']['#options'];
639
    }
640
  }
641

    
642
  return $sub_element;
643
}
644

    
645
/**
646
 * Validation function for date selector.
647
 *
648
 * When used as a Views widget, the validation step always gets triggered,
649
 * even with no form submission. Before form submission $element['#value']
650
 * contains a string, after submission it contains an array.
651
 */
652
function date_select_validate($element, &$form_state) {
653
  if (date_hidden_element($element)) {
654
    return;
655
  }
656

    
657
  if (is_string($element['#value'])) {
658
    return;
659
  }
660

    
661
  $input_exists = NULL;
662
  $input = drupal_array_get_nested_value($form_state['values'], $element['#parents'], $input_exists);
663

    
664
  // Strip field labels out of the results.
665
  foreach ($element['#value'] as $field => $field_value) {
666
    if (substr($field_value, 0, 1) == '-') {
667
      $input[$field] = '';
668
    }
669
  }
670

    
671
  drupal_alter('date_select_pre_validate', $element, $form_state, $input);
672

    
673
  $label = !empty($element['#date_title']) ? $element['#date_title'] : (!empty($element['#title']) ? $element['#title'] : '');
674
  if (isset($input['ampm'])) {
675
    if ($input['ampm'] == 'pm' && $input['hour'] < 12) {
676
      $input['hour'] += 12;
677
    }
678
    elseif ($input['ampm'] == 'am' && $input['hour'] == 12) {
679
      $input['hour'] -= 12;
680
    }
681
  }
682
  unset($input['ampm']);
683
  $date = date_select_input_date($element, $input);
684

    
685
  // If the field has errors, display them.
686
  $error_field = implode('][', $element['#parents']);
687
  $entered = array_values(array_filter($input));
688
  if (empty($date) || !empty($date->errors)) {
689
    // The input created a date but it has errors.
690
    if (is_object($date) && !empty($date->errors)) {
691
      $message = t('The value input for field %field is invalid:', array('%field' => $label));
692
      $message .= '<br />' . implode('<br />', $date->errors);
693
      form_set_error($error_field, $message);
694
      return;
695
    }
696
    // Nothing was entered but the date is required.
697
    elseif (empty($entered) && $element['#required']) {
698
      $message = t('A valid date is required for %title.', array('%title' => $label));
699
      form_set_error($error_field, $message);
700
      return;
701
    }
702
    // Something was input but it wasn't enough to create a valid date.
703
    elseif (!empty($entered)) {
704
      $message = t('The value input for field %field is invalid.', array('%field' => $label));
705
      form_set_error($error_field, $message);
706
      return;
707
    }
708
  }
709
  $value = !empty($date) ? $date->format(DATE_FORMAT_DATETIME) : NULL;
710
  form_set_value($element, $value, $form_state);
711
}
712

    
713
/**
714
 * Helper function for creating a date object out of user input.
715
 */
716
function date_select_input_date($element, $input) {
717

    
718
  // Was anything entered? If not, we have no date.
719
  if (!is_array($input)) {
720
    return NULL;
721
  }
722
  else {
723
    $entered = array_values(array_filter($input));
724
    if (empty($entered)) {
725
      return NULL;
726
    }
727
  }
728
  $granularity = date_format_order($element['#date_format']);
729
  if (isset($input['ampm'])) {
730
    if ($input['ampm'] == 'pm' && $input['hour'] < 12) {
731
      $input['hour'] += 12;
732
    }
733
    elseif ($input['ampm'] == 'am' && $input['hour'] == 12) {
734
      $input['hour'] -= 12;
735
    }
736
  }
737
  unset($input['ampm']);
738

    
739
  // Make the input match the granularity.
740
  foreach (date_nongranularity($granularity) as $part) {
741
    unset($input[$part]);
742
  }
743

    
744
  $date = new DateObject($input, $element['#date_timezone']);
745
  if (is_object($date)) {
746
    $date->limitGranularity($granularity);
747
    if ($date->validGranularity($granularity, $element['#date_flexible'])) {
748
      date_increment_round($date, $element['#date_increment']);
749
    }
750
    return $date;
751
  }
752
  return NULL;
753
}