public function Styleswitcher::build in Style Switcher 3.0.x
Same name and namespace in other branches
- 8.2 src/Plugin/Block/Styleswitcher.php \Drupal\styleswitcher\Plugin\Block\Styleswitcher::build()
Builds and returns the renderable array for this block plugin.
If a block should not be rendered because it has no content, then this method must also ensure to return no content: it must then only return an empty array, or an empty array with #cache set (with cacheability metadata indicating the circumstances for it being empty).
Return value
array A renderable array representing the content of the block.
Overrides BlockPluginInterface::build
See also
\Drupal\block\BlockViewBuilder
File
- src/
Plugin/ Block/ Styleswitcher.php, line 86
Class
- Styleswitcher
- Provides the Style Switcher block.
Namespace
Drupal\styleswitcher\Plugin\BlockCode
public function build() {
$block = [];
$theme = $this->themeManager
->getActiveTheme()
->getName();
// List of styles a user can switch between.
$styles = styleswitcher_style_load_multiple($theme, [
'status' => TRUE,
]);
// Do not display block if there is only one style (no alternatives).
if (count($styles) > 1) {
uasort($styles, 'styleswitcher_sort');
$links = [];
$destination = $this->redirectDestination
->getAsArray();
foreach ($styles as $name => $style) {
$name_hyphenated = strtr($name, '_', '-');
$name_parts = explode('/', $name_hyphenated);
$class = [
'style-switcher',
$name_parts[0] . '-style',
'style-' . $name_parts[1],
];
$route_params = [
'theme' => $theme,
'type' => $name_parts[0],
'style' => $name_parts[1],
];
$options = [
'query' => $destination,
'attributes' => [
'class' => $class,
'data-rel' => $name,
'rel' => 'nofollow',
],
];
$links[] = Link::fromTextAndUrl($style['label'], Url::fromRoute('styleswitcher.switch', $route_params, $options));
// Make paths absolute for JS.
if (isset($style['path'])) {
$styles[$name]['path'] = file_create_url($style['path']);
}
else {
$styles[$name]['path'] = Url::fromRoute('styleswitcher.css', [
'theme' => $theme,
], [
'absolute' => TRUE,
])
->toString();
}
}
$js_settings = [
'styleSwitcher' => [
'styles' => $styles,
'default' => styleswitcher_default_style_key($theme),
'enableOverlay' => $this->configFactory
->get('styleswitcher.settings')
->get('enable_overlay'),
'cookieExpire' => STYLESWITCHER_COOKIE_EXPIRE,
'theme' => $theme,
],
];
$attached['library'][] = 'styleswitcher/styleswitcher';
$attached['drupalSettings'] = $js_settings;
$block = [
'#theme' => 'item_list',
'#items' => $links,
'#attached' => $attached,
'#cache' => [
// We cannot cache globally, because we use drupal_get_destination()
// with links in block, which is different from page to page. And we
// cannot avoid using destination, because in this case site users
// with JS-disabled browsers won't go back to the same page they were
// at, but will go to the front page each time. We also cannot rely on
// $_SERVER['HTTP_REFERER'], because it can be empty.
'contexts' => [
'theme',
'url',
],
'tags' => [
'config:styleswitcher.settings',
'config:styleswitcher.custom_styles',
'config:styleswitcher.styles_settings',
],
],
];
}
else {
$block['#cache'] = [
'contexts' => [
'theme',
],
'tags' => [
'config:styleswitcher.custom_styles',
'config:styleswitcher.styles_settings',
],
];
}
return $block;
}