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