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<?php |
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/** |
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* @package s9e\TextFormatter |
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* @copyright Copyright (c) 2010-2019 The s9e Authors |
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* @license http://www.opensource.org/licenses/mit-license.php The MIT License |
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*/ |
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namespace s9e\TextFormatter\Configurator\RendererGenerators; |
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use s9e\TextFormatter\Configurator\Helpers\TemplateHelper; |
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use s9e\TextFormatter\Configurator\RendererGenerator; |
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use s9e\TextFormatter\Configurator\RendererGenerators\XSLT\Optimizer; |
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use s9e\TextFormatter\Configurator\Rendering; |
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use s9e\TextFormatter\Renderers\XSLT as XSLTRenderer; |
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class XSLT implements RendererGenerator |
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{ |
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/** |
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* @var Optimizer |
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*/ |
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public $optimizer; |
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/** |
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* Constructor |
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*/ |
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public function __construct() |
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{ |
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$this->optimizer = new Optimizer; |
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} |
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/** |
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* {@inheritdoc} |
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*/ |
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public function getRenderer(Rendering $rendering) |
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{ |
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return new XSLTRenderer($this->getXSL($rendering)); |
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} |
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/** |
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* Generate an XSL stylesheet based on given rendering configuration |
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* |
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* @param Rendering $rendering |
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* @return string |
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*/ |
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public function getXSL(Rendering $rendering) |
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{ |
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$groupedTemplates = []; |
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$templates = $rendering->getTemplates(); |
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// Replace simple templates if there are at least 3 of them |
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TemplateHelper::replaceHomogeneousTemplates($templates, 3); |
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// Group tags with identical templates together |
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foreach ($templates as $tagName => $template) |
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{ |
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$template = $this->optimizer->optimizeTemplate($template); |
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$groupedTemplates[$template][] = $tagName; |
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} |
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// Declare all the namespaces in use at the top |
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$xsl = '<xsl:stylesheet version="1.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform"'; |
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// Append the namespace declarations to the stylesheet |
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$prefixes = $this->getPrefixes(array_keys($templates)); |
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if (!empty($prefixes)) |
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{ |
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foreach ($prefixes as $prefix) |
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{ |
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$xsl .= ' xmlns:' . $prefix . '="urn:s9e:TextFormatter:' . $prefix . '"'; |
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} |
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/** |
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* Exclude those prefixes to keep the HTML neat |
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* |
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* @link http://lenzconsulting.com/namespaces-in-xslt/#exclude-result-prefixes |
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*/ |
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$xsl .= ' exclude-result-prefixes="' . implode(' ', $prefixes) . '"'; |
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} |
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// Start the stylesheet with the boilerplate stuff |
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$xsl .= '><xsl:output method="html" encoding="utf-8" indent="no"/>'; |
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// Add stylesheet parameters |
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foreach ($rendering->getAllParameters() as $paramName => $paramValue) |
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{ |
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$xsl .= $this->writeTag('xsl:param', ['name' => $paramName], htmlspecialchars($paramValue, ENT_NOQUOTES)); |
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} |
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// Add templates |
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foreach ($groupedTemplates as $template => $tagNames) |
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{ |
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$xsl .= $this->writeTag('xsl:template', ['match' => implode('|', $tagNames)], $template); |
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} |
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$xsl .= '</xsl:stylesheet>'; |
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return $xsl; |
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} |
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/** |
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* Extract and return the sorted list of prefixes used in given list of tag names |
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* |
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* @param string[] $tagNames |
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* @return string[] |
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*/ |
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protected function getPrefixes(array $tagNames) |
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{ |
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$prefixes = []; |
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foreach ($tagNames as $tagName) |
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{ |
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$pos = strpos($tagName, ':'); |
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if ($pos !== false) |
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{ |
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$prefixes[substr($tagName, 0, $pos)] = 1; |
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} |
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} |
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$prefixes = array_keys($prefixes); |
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sort($prefixes); |
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return $prefixes; |
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} |
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/** |
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* Serialize given tag to XML |
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* |
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* @param string $tagName |
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* @param array $attributes |
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* @param string $content |
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* @return string |
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*/ |
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protected function writeTag($tagName, array $attributes, $content) |
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{ |
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$xml = '<' . $tagName; |
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foreach ($attributes as $attrName => $attrValue) |
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{ |
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$xml .= ' ' . $attrName . '="' . htmlspecialchars($attrValue) . '"'; |
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} |
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if ($content === '') |
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{ |
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$xml .= '/>'; |
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} |
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else |
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{ |
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$xml .= '>' . $content . '</' . $tagName . '>'; |
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} |
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return $xml; |
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} |
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} |
s9e /
TextFormatter
