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<?php
/**
* @file
* Contains \Drupal\Core\Render\Element\Table.
*/
namespace Drupal\Core\Render\Element;
use Drupal\Core\Form\FormStateInterface;
use Drupal\Core\Render\Element;
/**
* Provides a render element for a table.
*
* Note: Although this extends FormElement, it can be used outside the
* context of a form.
*
* @see \Drupal\Core\Render\Element\Tableselect
*
* @FormElement("table")
*/
class Table extends FormElement {
/**
* {@inheritdoc}
*/
public function getInfo() {
$class = get_class($this);
return array(
'#header' => array(),
'#rows' => array(),
'#empty' => '',
// Properties for tableselect support.
'#input' => TRUE,
'#tree' => TRUE,
'#tableselect' => FALSE,
'#sticky' => FALSE,
'#responsive' => TRUE,
'#multiple' => TRUE,
'#js_select' => TRUE,
'#process' => array(
array($class, 'processTable'),
),
'#element_validate' => array(
array($class, 'validateTable'),
),
// Properties for tabledrag support.
// The value is a list of arrays that are passed to
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// drupal_attach_tabledrag(). Table::preRenderTable() prepends the HTML ID
// of the table to each set of options.
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// @see drupal_attach_tabledrag()
'#tabledrag' => array(),
// Render properties.
'#pre_render' => array(
array($class, 'preRenderTable'),
),
'#theme' => 'table',
);
}
/**
* {@inheritdoc}
*/
public static function valueCallback(&$element, $input, FormStateInterface $form_state) {
// If #multiple is FALSE, the regular default value of radio buttons is used.
if (!empty($element['#tableselect']) && !empty($element['#multiple'])) {
// Contrary to #type 'checkboxes', the default value of checkboxes in a
// table is built from the array keys (instead of array values) of the
// #default_value property.
// @todo D8: Remove this inconsistency.
if ($input === FALSE) {
$element += array('#default_value' => array());
$value = array_keys(array_filter($element['#default_value']));
return array_combine($value, $value);
}
else {
return is_array($input) ? array_combine($input, $input) : array();
}
}
}
/**
* #process callback for #type 'table' to add tableselect support.
*
* @param array $element
* An associative array containing the properties and children of the
* table element.
* @param \Drupal\Core\Form\FormStateInterface $form_state
* The current state of the form.
* @param array $complete_form
* The complete form structure.
*
* @return array
* The processed element.
*/
public static function processTable(&$element, FormStateInterface $form_state, &$complete_form) {
if ($element['#tableselect']) {
if ($element['#multiple']) {
$value = is_array($element['#value']) ? $element['#value'] : array();
}
// Advanced selection behavior makes no sense for radios.
else {
$element['#js_select'] = FALSE;
}
// Add a "Select all" checkbox column to the header.
// @todo D8: Rename into #select_all?
if ($element['#js_select']) {
$element['#attached']['library'][] = 'core/drupal.tableselect';
array_unshift($element['#header'], array('class' => array('select-all')));
}
// Add an empty header column for radio buttons or when a "Select all"
// checkbox is not desired.
else {
array_unshift($element['#header'], '');
}
if (!isset($element['#default_value']) || $element['#default_value'] === 0) {
$element['#default_value'] = array();
}
// Create a checkbox or radio for each row in a way that the value of the
// tableselect element behaves as if it had been of #type checkboxes or
// radios.
foreach (Element::children($element) as $key) {
$row = &$element[$key];
// Prepare the element #parents for the tableselect form element.
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// Their values have to be located in child keys (#tree is ignored),
// since Table::validateTable() has to be able to validate whether input
// (for the parent #type 'table' element) has been submitted.
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$element_parents = array_merge($element['#parents'], array($key));
// Since the #parents of the tableselect form element will equal the
// #parents of the row element, prevent FormBuilder from auto-generating
// an #id for the row element, since drupal_html_id() would automatically
// append a suffix to the tableselect form element's #id otherwise.
$row['#id'] = drupal_html_id('edit-' . implode('-', $element_parents) . '-row');
// Do not overwrite manually created children.
if (!isset($row['select'])) {
// Determine option label; either an assumed 'title' column, or the
// first available column containing a #title or #markup.
// @todo Consider to add an optional $element[$key]['#title_key']
// defaulting to 'title'?
unset($label_element);
$title = NULL;
if (isset($row['title']['#type']) && $row['title']['#type'] == 'label') {
$label_element = &$row['title'];
}
else {
if (!empty($row['title']['#title'])) {
$title = $row['title']['#title'];
}
else {
foreach (Element::children($row) as $column) {
if (isset($row[$column]['#title'])) {
$title = $row[$column]['#title'];
break;
}
if (isset($row[$column]['#markup'])) {
$title = $row[$column]['#markup'];
break;
}
}
}
if (isset($title) && $title !== '') {
$title = t('Update !title', array('!title' => $title));
}
}
// Prepend the select column to existing columns.
$row = array('select' => array()) + $row;
$row['select'] += array(
'#type' => $element['#multiple'] ? 'checkbox' : 'radio',
'#id' => drupal_html_id('edit-' . implode('-', $element_parents)),
// @todo If rows happen to use numeric indexes instead of string keys,
// this results in a first row with $key === 0, which is always FALSE.
'#return_value' => $key,
'#attributes' => $element['#attributes'],
'#wrapper_attributes' => array(
'class' => array('table-select'),
),
);
if ($element['#multiple']) {
$row['select']['#default_value'] = isset($value[$key]) ? $key : NULL;
$row['select']['#parents'] = $element_parents;
}
else {
$row['select']['#default_value'] = ($element['#default_value'] == $key ? $key : NULL);
$row['select']['#parents'] = $element['#parents'];
}
if (isset($label_element)) {
$label_element['#id'] = $row['select']['#id'] . '--label';
$label_element['#for'] = $row['select']['#id'];
$row['select']['#attributes']['aria-labelledby'] = $label_element['#id'];
$row['select']['#title_display'] = 'none';
}
else {
$row['select']['#title'] = $title;
$row['select']['#title_display'] = 'invisible';
}
}
}
}
return $element;
}
/**
* #element_validate callback for #type 'table'.
*
* @param array $element
* An associative array containing the properties and children of the
* table element.
* @param \Drupal\Core\Form\FormStateInterface $form_state
* The current state of the form.
* @param array $complete_form
* The complete form structure.
*/
public static function validateTable(&$element, FormStateInterface $form_state, &$complete_form) {
// Skip this validation if the button to submit the form does not require
// selected table row data.
if (empty($form_state['triggering_element']['#tableselect'])) {
return;
}
if ($element['#multiple']) {
if (!is_array($element['#value']) || !count(array_filter($element['#value']))) {
$form_state->setError($element, t('No items selected.'));
}
}
elseif (!isset($element['#value']) || $element['#value'] === '') {
$form_state->setError($element, t('No item selected.'));
}
}
/**
* #pre_render callback to transform children of an element into #rows suitable for theme_table().
*
* This function converts sub-elements of an element of #type 'table' to be
* suitable for theme_table():
* - The first level of sub-elements are table rows. Only the #attributes
* property is taken into account.
* - The second level of sub-elements is converted into columns for the
* corresponding first-level table row.
*
* Simple example usage:
* @code
* $form['table'] = array(
* '#type' => 'table',
* '#header' => array(t('Title'), array('data' => t('Operations'), 'colspan' => '1')),
* // Optionally, to add tableDrag support:
* '#tabledrag' => array(
* array(
* 'action' => 'order',
* 'relationship' => 'sibling',
* 'group' => 'thing-weight',
* ),
* ),
* );
* foreach ($things as $row => $thing) {
* $form['table'][$row]['#weight'] = $thing['weight'];
*
* $form['table'][$row]['title'] = array(
* '#type' => 'textfield',
* '#default_value' => $thing['title'],
* );
*
* // Optionally, to add tableDrag support:
* $form['table'][$row]['#attributes']['class'][] = 'draggable';
* $form['table'][$row]['weight'] = array(
* '#type' => 'textfield',
* '#title' => t('Weight for @title', array('@title' => $thing['title'])),
* '#title_display' => 'invisible',
* '#size' => 4,
* '#default_value' => $thing['weight'],
* '#attributes' => array('class' => array('thing-weight')),
* );
*
* // The amount of link columns should be identical to the 'colspan'
* // attribute in #header above.
* $form['table'][$row]['edit'] = array(
* '#type' => 'link',
* '#title' => t('Edit'),
* '#href' => 'thing/' . $row . '/edit',
* );
* }
* @endcode
*
* @param array $element
* A structured array containing two sub-levels of elements. Properties used:
* - #tabledrag: The value is a list of $options arrays that are passed to
* drupal_attach_tabledrag(). The HTML ID of the table is added to each
* $options array.
*
* @return array
*
* @see theme_table()
* @see drupal_process_attached()
* @see drupal_attach_tabledrag()
*/
public static function preRenderTable($element) {
foreach (Element::children($element) as $first) {
$row = array('data' => array());
// Apply attributes of first-level elements as table row attributes.
if (isset($element[$first]['#attributes'])) {
$row += $element[$first]['#attributes'];
}
// Turn second-level elements into table row columns.
// @todo Do not render a cell for children of #type 'value'.
// @see http://drupal.org/node/1248940
foreach (Element::children($element[$first]) as $second) {
// Assign the element by reference, so any potential changes to the
// original element are taken over.
$column = array('data' => &$element[$first][$second]);
// Apply wrapper attributes of second-level elements as table cell
// attributes.
if (isset($element[$first][$second]['#wrapper_attributes'])) {
$column += $element[$first][$second]['#wrapper_attributes'];
}
$row['data'][] = $column;
}
$element['#rows'][] = $row;
}
// Take over $element['#id'] as HTML ID attribute, if not already set.
Element::setAttributes($element, array('id'));
// Add sticky headers, if applicable.
if (count($element['#header']) && $element['#sticky']) {
$element['#attached']['library'][] = 'core/drupal.tableheader';
// Add 'sticky-enabled' class to the table to identify it for JS.
// This is needed to target tables constructed by this function.
$element['#attributes']['class'][] = 'sticky-enabled';
}
// If the table has headers and it should react responsively to columns hidden
// with the classes represented by the constants RESPONSIVE_PRIORITY_MEDIUM
// and RESPONSIVE_PRIORITY_LOW, add the tableresponsive behaviors.
if (count($element['#header']) && $element['#responsive']) {
$element['#attached']['library'][] = 'core/drupal.tableresponsive';
// Add 'responsive-enabled' class to the table to identify it for JS.
// This is needed to target tables constructed by this function.
$element['#attributes']['class'][] = 'responsive-enabled';
}
// If the custom #tabledrag is set and there is a HTML ID, add the table's
// HTML ID to the options and attach the behavior.
if (!empty($element['#tabledrag']) && isset($element['#attributes']['id'])) {
foreach ($element['#tabledrag'] as $options) {
$options['table_id'] = $element['#attributes']['id'];
drupal_attach_tabledrag($element, $options);
}
}
return $element;
}
}