114 lines
2.3 KiB
PHP
114 lines
2.3 KiB
PHP
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<?php
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namespace FML\Script\Features;
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use FML\Script\Builder;
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use FML\Script\Script;
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use FML\Script\ScriptLabel;
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/**
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* Script Feature for Image Preloading
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*
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* @author steeffeen <mail@steeffeen.com>
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* @copyright FancyManiaLinks Copyright © 2017 Steffen Schröder
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* @license http://www.gnu.org/licenses/ GNU General Public License, Version 3
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*/
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class Preload extends ScriptFeature
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{
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/**
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* @var string[] $imageUrls Image urls
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*/
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protected $imageUrls = array();
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/**
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* Construct a new Preload
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*
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* @api
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* @param string[] $imageUrls (optional) Image urls
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*/
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public function __construct(array $imageUrls = null)
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{
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if ($imageUrls) {
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$this->setImageUrls($imageUrls);
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}
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}
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/**
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* Get Image Urls to preload
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*
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* @api
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* @return string[]
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*/
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public function getImageUrls()
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{
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return $this->imageUrls;
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}
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/**
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* Add an Image Url to preload
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*
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* @api
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* @param string $imageUrl Image Url
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* @return static
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*/
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public function addImageUrl($imageUrl)
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{
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if (!in_array($imageUrl, $this->imageUrls)) {
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array_push($this->imageUrls, $imageUrl);
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}
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return $this;
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}
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/**
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* Set Image Urls to preload
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*
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* @api
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* @param string[] $imageUrls Image Urls
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* @return static
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*/
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public function setImageUrls(array $imageUrls = array())
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{
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$this->imageUrls = $imageUrls;
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return $this;
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}
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/**
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* Remove all Image Urls
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*
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* @api
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* @return static
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*/
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public function removeAllImageUrls()
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{
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$this->imageUrls = array();
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return $this;
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}
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/**
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* @see ScriptFeature::prepare()
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*/
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public function prepare(Script $script)
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{
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$script->appendGenericScriptLabel(ScriptLabel::ONINIT, $this->getScriptText());
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return $this;
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}
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/**
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* Get the script text
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*
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* @return string
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*/
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protected function getScriptText()
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{
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$scriptText = "";
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foreach ($this->imageUrls as $imageUrl) {
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$escapedImageUrl = Builder::escapeText($imageUrl);
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$scriptText .= "
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PreloadImage({$escapedImageUrl});";
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}
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return $scriptText;
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}
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}
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