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85 lines
2.4 KiB
PHP
85 lines
2.4 KiB
PHP
<?php
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/**
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* @link https://www.yiiframework.com/
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* @copyright Copyright (c) 2008 Yii Software LLC
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* @license https://www.yiiframework.com/license/
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*/
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namespace yii\base;
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/**
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* DynamicContentAwareTrait implements common methods for classes
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* which support a [[View]] dynamic content feature.
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*
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* @author Sergey Makinen <sergey@makinen.ru>
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* @since 2.0.14
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*/
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trait DynamicContentAwareTrait
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{
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/**
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* @var string[] a list of placeholders for dynamic content
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*/
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private $_dynamicPlaceholders;
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/**
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* Returns the view object that can be used to render views or view files using dynamic contents.
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* @return View the view object that can be used to render views or view files.
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*/
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abstract protected function getView();
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/**
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* {@inheritdoc}
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*/
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public function getDynamicPlaceholders()
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{
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return $this->_dynamicPlaceholders;
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}
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/**
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* {@inheritdoc}
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*/
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public function setDynamicPlaceholders($placeholders)
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{
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$this->_dynamicPlaceholders = $placeholders;
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}
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/**
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* {@inheritdoc}
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*/
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public function addDynamicPlaceholder($name, $statements)
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{
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$this->_dynamicPlaceholders[$name] = $statements;
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}
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/**
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* Replaces placeholders in $content with results of evaluated dynamic statements.
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* @param string $content content to be parsed.
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* @param string[] $placeholders placeholders and their values.
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* @param bool $isRestoredFromCache whether content is going to be restored from cache.
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* @return string final content.
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*/
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protected function updateDynamicContent($content, $placeholders, $isRestoredFromCache = false)
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{
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if (empty($placeholders) || !is_array($placeholders)) {
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return $content;
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}
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if (count($this->getView()->getDynamicContents()) === 0) {
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// outermost cache: replace placeholder with dynamic content
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foreach ($placeholders as $name => $statements) {
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$placeholders[$name] = $this->getView()->evaluateDynamicContent($statements);
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}
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$content = strtr($content, $placeholders);
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}
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if ($isRestoredFromCache) {
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$view = $this->getView();
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foreach ($placeholders as $name => $statements) {
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$view->addDynamicPlaceholder($name, $statements);
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}
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}
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return $content;
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}
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}
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