yii2-bootstrap5/src/Dropdown.php
2021-08-05 09:21:05 +02:00

164 lines
6.3 KiB
PHP

<?php
declare(strict_types=1);
namespace yii\bootstrap5;
use Exception;
use yii\base\InvalidConfigException;
use yii\helpers\ArrayHelper;
/**
* Dropdown renders a Bootstrap dropdown menu component.
*
* For example,
*
* ```php
* <div class="dropdown">
* <a href="#" data-toggle="dropdown" class="dropdown-toggle">Label <b class="caret"></b></a>
* <?php
* echo Dropdown::widget([
* 'items' => [
* ['label' => 'DropdownA', 'url' => '/'],
* ['label' => 'DropdownB', 'url' => '#'],
* ],
* ]);
* ?>
* </div>
* ```
* @see https://getbootstrap.com/docs/5.1/components/dropdowns/
* @author Antonio Ramirez <amigo.cobos@gmail.com>
* @author Simon Karlen <simi.albi@outlook.com>
*/
class Dropdown extends Widget
{
/**
* @var array list of menu items in the dropdown. Each array element can be either an HTML string,
* or an array representing a single menu with the following structure:
*
* - label: string, required, the label of the item link.
* - encode: bool, optional, whether to HTML-encode item label.
* - url: string|array, optional, the URL of the item link. This will be processed by [[\yii\helpers\Url::to()]].
* If not set, the item will be treated as a menu header when the item has no sub-menu.
* - visible: bool, optional, whether this menu item is visible. Defaults to true.
* - disabled: bool, optional, whether this menu item is disabled. Defaults to false.
* - linkOptions: array, optional, the HTML attributes of the item link.
* - options: array, optional, the HTML attributes of the item.
* - active: bool, optional, whether the item should be on active state or not.
* - items: array, optional, the submenu items. The structure is the same as this property.
* Note that Bootstrap doesn't support dropdown submenu. You have to add your own CSS styles to support it.
* - submenuOptions: array, optional, the HTML attributes for sub-menu container tag. If specified it will be
* merged with [[submenuOptions]].
*
* To insert divider use `-`.
*/
public $items = [];
/**
* @var bool whether the labels for header items should be HTML-encoded.
*/
public $encodeLabels = true;
/**
* @var array|null the HTML attributes for sub-menu container tags.
*/
public $submenuOptions = [];
/**
* {@inheritDoc}
*/
public function init()
{
parent::init();
Html::addCssClass($this->options, ['widget' => 'dropdown-menu']);
}
/**
* Renders the widget.
* @return string
* @throws InvalidConfigException
*/
public function run(): string
{
BootstrapPluginAsset::register($this->getView());
$this->registerClientEvents();
return $this->renderItems($this->items, $this->options);
}
/**
* Renders menu items.
* @param array $items the menu items to be rendered
* @param array $options the container HTML attributes
* @return string the rendering result.
* @throws InvalidConfigException if the label option is not specified in one of the items.
* @throws Exception
*/
protected function renderItems(array $items, array $options = []): string
{
$lines = [];
foreach ($items as $item) {
if (is_string($item)) {
$lines[] = ($item === '-')
? Html::tag('hr', '', ['class' => 'dropdown-divider'])
: $item;
continue;
}
if (isset($item['visible']) && !$item['visible']) {
continue;
}
if (!array_key_exists('label', $item)) {
throw new InvalidConfigException("The 'label' option is required.");
}
$encodeLabel = $item['encode'] ?? $this->encodeLabels;
$label = $encodeLabel ? Html::encode($item['label']) : $item['label'];
$itemOptions = ArrayHelper::getValue($item, 'options', []);
$linkOptions = ArrayHelper::getValue($item, 'linkOptions', []);
$active = ArrayHelper::getValue($item, 'active', false);
$disabled = ArrayHelper::getValue($item, 'disabled', false);
Html::addCssClass($linkOptions, ['widget' => 'dropdown-item']);
if ($disabled) {
ArrayHelper::setValue($linkOptions, 'tabindex', '-1');
ArrayHelper::setValue($linkOptions, 'aria-disabled', 'true');
Html::addCssClass($linkOptions, ['disable' => 'disabled']);
} elseif ($active) {
ArrayHelper::setValue($linkOptions, 'aria-current', 'true');
Html::addCssClass($linkOptions, ['activate' => 'active']);
}
$url = array_key_exists('url', $item) ? $item['url'] : null;
if (empty($item['items'])) {
if ($url === null) {
$content = Html::tag('h6', $label, ['class' => 'dropdown-header']);
} else {
$content = Html::a($label, $url, $linkOptions);
}
$lines[] = $content;
} else {
$submenuOptions = $this->submenuOptions;
if (isset($item['submenuOptions'])) {
$submenuOptions = array_merge($submenuOptions, $item['submenuOptions']);
}
Html::addCssClass($submenuOptions, ['widget' => 'dropdown-submenu dropdown-menu']);
Html::addCssClass($linkOptions, ['toggle' => 'dropdown-toggle']);
$lines[] = Html::beginTag('div', array_merge_recursive(['class' => ['dropdown'], 'aria-expanded' => 'false'], $itemOptions));
$lines[] = Html::a($label, $url, array_merge([
'data-bs-toggle' => 'dropdown',
'aria-expanded' => 'false',
'role' => 'button',
], $linkOptions));
$lines[] = static::widget([
'items' => $item['items'],
'options' => $submenuOptions,
'submenuOptions' => $submenuOptions,
'encodeLabels' => $this->encodeLabels,
]);
$lines[] = Html::endTag('div');
}
}
return Html::tag('div', implode("\n", $lines), $options);
}
}