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/**
* @file
* Table select functionality.
*/
(function ($, Drupal) {
/**
* Initialize tableSelects.
*
* @type {Drupal~behavior}
*
* @prop {Drupal~behaviorAttach} attach
* Attaches tableSelect functionality.
*/
Drupal.behaviors.tableSelect = {
attach(context, settings) {
// Select the inner-most table in case of nested tables.
once(
'table-select',
$(context).find('th.select-all').closest('table'),
).forEach((table) => Drupal.tableSelect.call(table));
},
};
/**
* Callback used in {@link Drupal.behaviors.tableSelect}.
*/
Drupal.tableSelect = function () {
// Do not add a "Select all" checkbox if there are no rows with checkboxes
// in the table.
if ($(this).find('td input[type="checkbox"]').length === 0) {
return;
}
// Keep track of the table, which checkbox is checked and alias the
// settings.
const table = this;
let checkboxes;
let lastChecked;
const $table = $(table);
const strings = {
selectAll: Drupal.t('Select all rows in this table'),
selectNone: Drupal.t('Deselect all rows in this table'),
};
const updateSelectAll = function (state) {
// Update table's select-all checkbox (and sticky header's if available).
$table
.prev('table.sticky-header')
.addBack()
.find('th.select-all input[type="checkbox"]')
.each(function () {
const $checkbox = $(this);
const stateChanged = $checkbox.prop('checked') !== state;
$checkbox.attr(
'title',
state ? strings.selectNone : strings.selectAll,
);
/**
* @checkbox {HTMLElement}
*/
if (stateChanged) {
$checkbox.prop('checked', state).trigger('change');
}
});
};
// Find all <th> with class select-all, and insert the check all checkbox.
$table
.find('th.select-all')
.prepend($(Drupal.theme('checkbox')).attr('title', strings.selectAll))
.on('click', (event) => {
if ($(event.target).is('input[type="checkbox"]')) {
// Loop through all checkboxes and set their state to the select all
// checkbox' state.
checkboxes.each(function () {
const $checkbox = $(this);
const stateChanged =
$checkbox.prop('checked') !== event.target.checked;
/**
* @checkbox {HTMLElement}
*/
if (stateChanged) {
$checkbox.prop('checked', event.target.checked).trigger('change');
}
// Either add or remove the selected class based on the state of the
// check all checkbox.
/**
* @checkbox {HTMLElement}
*/
$checkbox.closest('tr').toggleClass('selected', this.checked);
});
// Update the title and the state of the check all box.
updateSelectAll(event.target.checked);
}
});
// For each of the checkboxes within the table that are not disabled.
checkboxes = $table
.find('td input[type="checkbox"]:enabled')
.on('click', function (e) {
// Either add or remove the selected class based on the state of the
// check all checkbox.
/**
* @this {HTMLElement}
*/
$(this).closest('tr').toggleClass('selected', this.checked);
// If this is a shift click, we need to highlight everything in the
// range. Also make sure that we are actually checking checkboxes
// over a range and that a checkbox has been checked or unchecked before.
if (e.shiftKey && lastChecked && lastChecked !== e.target) {
// We use the checkbox's parent <tr> to do our range searching.
Drupal.tableSelectRange(
$(e.target).closest('tr')[0],
$(lastChecked).closest('tr')[0],
e.target.checked,
);
}
// If all checkboxes are checked, make sure the select-all one is checked
// too, otherwise keep unchecked.
updateSelectAll(
checkboxes.length === checkboxes.filter(':checked').length,
);
// Keep track of the last checked checkbox.
lastChecked = e.target;
});
// If all checkboxes are checked on page load, make sure the select-all one
// is checked too, otherwise keep unchecked.
updateSelectAll(checkboxes.length === checkboxes.filter(':checked').length);
};
/**
* @param {HTMLElement} from
* The HTML element representing the "from" part of the range.
* @param {HTMLElement} to
* The HTML element representing the "to" part of the range.
* @param {bool} state
* The state to set on the range.
*/
Drupal.tableSelectRange = function (from, to, state) {
// We determine the looping mode based on the order of from and to.
const mode =
from.rowIndex > to.rowIndex ? 'previousSibling' : 'nextSibling';
// Traverse through the sibling nodes.
for (let i = from[mode]; i; i = i[mode]) {
const $i = $(i);
// Make sure that we're only dealing with elements.
if (i.nodeType !== 1) {
continue;
}
// Either add or remove the selected class based on the state of the
// target checkbox.
$i.toggleClass('selected', state);
$i.find('input[type="checkbox"]').prop('checked', state);
if (to.nodeType) {
// If we are at the end of the range, stop.
if (i === to) {
break;
}
}
// A faster alternative to doing $(i).filter(to).length.
else if ($.filter(to, [i]).r.length) {
break;
}
}
};
})(jQuery, Drupal);
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