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<?php |
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/* @description Transformation Style Sheets - Revolutionising PHP templating * |
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* @author Tom Butler [email protected] * |
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* @copyright 2017 Tom Butler <[email protected]> | https://r.je/ * |
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* @license http://www.opensource.org/licenses/bsd-license.php BSD License * |
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* @version 1.2 */ |
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namespace Transphporm\Property; |
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class Content implements \Transphporm\Property { |
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private $contentPseudo = []; |
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private $formatter; |
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public function __construct(\Transphporm\Hook\Formatter $formatter) { |
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$this->formatter = $formatter; |
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} |
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public function run(array $values, \DomElement $element, array $rules, \Transphporm\Hook\PseudoMatcher $pseudoMatcher, array $properties = []) { |
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if (!$this->shouldRun($element)) return false; |
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$values = $this->formatter->format($values, $rules); |
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if (!$this->processPseudo($values, $element, $pseudoMatcher)) { |
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//Remove the current contents |
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$this->removeAllChildren($element); |
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//Now make a text node |
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if ($this->getContentMode($rules) === 'replace') $this->replaceContent($element, $values); |
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else $this->appendContent($element, $values); |
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} |
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} |
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private function shouldRun($element) { |
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do { |
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if ($element->getAttribute('transphporm') == 'includedtemplate') return false; |
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} |
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while (($element = $element->parentNode) instanceof \DomElement); |
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return true; |
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} |
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private function getContentMode($rules) { |
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return (isset($rules['content-mode'])) ? $rules['content-mode']->read() : 'append'; |
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} |
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public function addContentPseudo($name, ContentPseudo $contentPseudo) { |
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$this->contentPseudo[$name] = $contentPseudo; |
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} |
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private function processPseudo($value, $element, $pseudoMatcher) { |
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foreach ($this->contentPseudo as $pseudoName => $pseudoFunction) { |
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if ($pseudoMatcher->hasFunction($pseudoName)) { |
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$pseudoFunction->run($value, $pseudoMatcher->getFuncArgs($pseudoName, $element)[0], $element, $pseudoMatcher); |
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return true; |
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} |
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} |
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return false; |
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} |
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public function getNode($node, $document) { |
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foreach ($node as $n) { |
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if (is_array($n)) { |
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foreach ($this->getNode($n, $document) as $new) yield $new; |
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} |
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else { |
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yield $this->convertNode($n, $document); |
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} |
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} |
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} |
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private function convertNode($node, $document) { |
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if ($node instanceof \DomElement || $node instanceof \DOMComment) { |
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$new = $document->importNode($node, true); |
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} |
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else { |
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if ($node instanceof \DomText) $node = $node->nodeValue; |
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$new = $document->createElement('text'); |
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$new->appendChild($document->createTextNode($node)); |
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$new->setAttribute('transphporm', 'text'); |
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} |
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return $new; |
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} |
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private function replaceContent($element, $content) { |
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if ($element->getAttribute('transphporm') == 'added') return; |
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//If this rule was cached, the elements that were added last time need to be removed prior to running the rule again. |
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if ($element->getAttribute('transphporm')) { |
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$this->replaceCachedContent($element); |
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} |
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foreach ($this->getNode($content, $element->ownerDocument) as $node) { |
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if ($node instanceof \DomElement && !$node->getAttribute('transphporm')) $node->setAttribute('transphporm', 'added'); |
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$element->parentNode->insertBefore($node, $element); |
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} |
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//Remove the original element from the final output |
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$element->setAttribute('transphporm', 'remove'); |
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} |
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private function replaceCachedContent($element) { |
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$el = $element; |
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while ($el = $el->previousSibling) { |
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if ($el->nodeType == 1 && $el->getAttribute('transphporm') != 'remove') { |
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$el->parentNode->removeChild($el); |
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} |
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} |
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$this->fixPreserveWhitespaceRemoveChild($element); |
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} |
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// $doc->preserveWhiteSpace = false should fix this but it doesn't |
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// Remove extra whitespace created by removeChild to avoid the cache growing 1 byte every time it's reloaded |
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// This may need to be moved in future, anywhere elements are being removed and files are cached may need to apply this fix |
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// Also remove any comments to avoid the comment being re-added every time the cache is reloaded |
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private function fixPreserveWhitespaceRemoveChild($element) { |
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if ($element->previousSibling instanceof \DomComment || ($element->previousSibling instanceof \DomText && trim($element->previousSibling->isElementContentWhiteSpace()))) { |
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$element->parentNode->removeChild($element->previousSibling); |
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} |
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} |
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private function appendContent($element, $content) { |
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foreach ($this->getNode($content, $element->ownerDocument) as $node) { |
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$element->appendChild($node); |
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} |
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} |
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private function removeAllChildren($element) { |
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while ($element->hasChildNodes()) $element->removeChild($element->firstChild); |
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} |
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} |
Level-2 /
Transphporm
