silverstripe-cms/code/Controllers/LeftAndMainPageIconsExtension.php
2024-01-18 11:10:35 +13:00

79 lines
2.3 KiB
PHP

<?php
namespace SilverStripe\CMS\Controllers;
use Psr\SimpleCache\CacheInterface;
use Psr\SimpleCache\InvalidArgumentException;
use ReflectionException;
use SilverStripe\Admin\LeftAndMain;
use SilverStripe\CMS\Model\SiteTree;
use SilverStripe\Core\ClassInfo;
use SilverStripe\Core\Config\Config;
use SilverStripe\Core\Convert;
use SilverStripe\Core\Extension;
use SilverStripe\Core\Flushable;
use SilverStripe\Core\Injector\Injector;
use SilverStripe\View\Requirements;
/**
* Extension to include custom page icons
*
* @extends Extension<LeftAndMain>
*/
class LeftAndMainPageIconsExtension extends Extension implements Flushable
{
/**
* @throws InvalidArgumentException
* @throws ReflectionException
*/
public function init()
{
Requirements::customCSS($this->generatePageIconsCss(), CMSMain::PAGE_ICONS_ID);
}
/**
* Just broadly clears the cache on flush
*/
public static function flush()
{
Injector::inst()->get(CacheInterface::class . '.SiteTree_PageIcons')->clear();
}
/**
* Include CSS for page icons. We're not using the JSTree 'types' option
* because it causes too much performance overhead just to add some icons.
*
* @return string CSS
* @throws InvalidArgumentException
* @throws ReflectionException
*/
public function generatePageIconsCss()
{
/** @var CacheInterface $cache */
$cache = Injector::inst()->get(CacheInterface::class . '.SiteTree_PageIcons');
if ($cache->has('css')) {
return $cache->get('css');
}
$css = '';
$classes = ClassInfo::subclassesFor(SiteTree::class);
foreach ($classes as $class) {
if (!empty(Config::inst()->get($class, 'icon_class', Config::UNINHERITED))) {
continue;
}
$iconURL = SiteTree::singleton($class)->getPageIconURL();
if ($iconURL) {
$cssClass = Convert::raw2htmlid($class);
$selector = sprintf('.page-icon.class-%1$s, li.class-%1$s > a .jstree-pageicon', $cssClass);
$css .= sprintf('%s { background: transparent url(\'%s\') 0 0 no-repeat; }', $selector, $iconURL);
}
}
$cache->set('css', $css);
return $css;
}
}