Verzeichnisstruktur phpBB-3.3.15
- Veröffentlicht
- 28.08.2024
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XSLT.php
001 <?php
002
003 /**
004 * @package s9e\TextFormatter
005 * @copyright Copyright (c) 2010-2022 The s9e authors
006 * @license http://www.opensource.org/licenses/mit-license.php The MIT License
007 */
008 namespace s9e\TextFormatter\Configurator\RendererGenerators;
009
010 use s9e\TextFormatter\Configurator\Helpers\TemplateHelper;
011 use s9e\TextFormatter\Configurator\RendererGenerator;
012 use s9e\TextFormatter\Configurator\Rendering;
013 use s9e\TextFormatter\Configurator\TemplateNormalizer;
014 use s9e\TextFormatter\Renderers\XSLT as XSLTRenderer;
015
016 class XSLT implements RendererGenerator
017 {
018 /**
019 * @var TemplateNormalizer
020 */
021 public $normalizer;
022
023 /**
024 * Constructor
025 */
026 public function __construct()
027 {
028 $this->normalizer = new TemplateNormalizer([
029 'MergeConsecutiveCopyOf',
030 'MergeIdenticalConditionalBranches',
031 'OptimizeNestedConditionals',
032 'RemoveLivePreviewAttributes'
033 ]);
034 }
035
036 /**
037 * {@inheritdoc}
038 */
039 public function getRenderer(Rendering $rendering)
040 {
041 return new XSLTRenderer($this->getXSL($rendering));
042 }
043
044 /**
045 * Generate an XSL stylesheet based on given rendering configuration
046 *
047 * @param Rendering $rendering
048 * @return string
049 */
050 public function getXSL(Rendering $rendering)
051 {
052 $groupedTemplates = [];
053 $templates = $rendering->getTemplates();
054
055 // Replace simple templates if there are at least 3 of them
056 TemplateHelper::replaceHomogeneousTemplates($templates, 3);
057
058 // Group tags with identical templates together
059 foreach ($templates as $tagName => $template)
060 {
061 $template = $this->normalizer->normalizeTemplate($template);
062 $groupedTemplates[$template][] = $tagName;
063 }
064
065 // Declare all the namespaces in use at the top
066 $xsl = '<xsl:stylesheet version="1.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform"';
067
068 // Append the namespace declarations to the stylesheet
069 $prefixes = $this->getPrefixes(array_keys($templates));
070 if (!empty($prefixes))
071 {
072 foreach ($prefixes as $prefix)
073 {
074 $xsl .= ' xmlns:' . $prefix . '="urn:s9e:TextFormatter:' . $prefix . '"';
075 }
076
077 /**
078 * Exclude those prefixes to keep the HTML neat
079 *
080 * @link http://lenzconsulting.com/namespaces-in-xslt/#exclude-result-prefixes
081 */
082 $xsl .= ' exclude-result-prefixes="' . implode(' ', $prefixes) . '"';
083 }
084
085 // Start the stylesheet with the boilerplate stuff
086 $xsl .= '><xsl:output method="html" encoding="utf-8" indent="no"/><xsl:decimal-format decimal-separator="."/>';
087
088 // Add stylesheet parameters
089 foreach ($rendering->getAllParameters() as $paramName => $paramValue)
090 {
091 $xsl .= $this->writeTag('xsl:param', ['name' => $paramName], htmlspecialchars($paramValue, ENT_NOQUOTES));
092 }
093
094 // Add templates
095 foreach ($groupedTemplates as $template => $tagNames)
096 {
097 $xsl .= $this->writeTag('xsl:template', ['match' => implode('|', $tagNames)], $template);
098 }
099
100 $xsl .= '</xsl:stylesheet>';
101
102 return $xsl;
103 }
104
105 /**
106 * Extract and return the sorted list of prefixes used in given list of tag names
107 *
108 * @param string[] $tagNames
109 * @return string[]
110 */
111 protected function getPrefixes(array $tagNames)
112 {
113 $prefixes = [];
114 foreach ($tagNames as $tagName)
115 {
116 $pos = strpos($tagName, ':');
117 if ($pos !== false)
118 {
119 $prefixes[substr($tagName, 0, $pos)] = 1;
120 }
121 }
122 $prefixes = array_keys($prefixes);
123 sort($prefixes);
124
125 return $prefixes;
126 }
127
128 /**
129 * Serialize given tag to XML
130 *
131 * @param string $tagName
132 * @param array $attributes
133 * @param string $content
134 * @return string
135 */
136 protected function writeTag($tagName, array $attributes, $content)
137 {
138 $xml = '<' . $tagName;
139 foreach ($attributes as $attrName => $attrValue)
140 {
141 $xml .= ' ' . $attrName . '="' . htmlspecialchars($attrValue, ENT_COMPAT, 'utf-8') . '"';
142 }
143 if ($content === '')
144 {
145 $xml .= '/>';
146 }
147 else
148 {
149 $xml .= '>' . $content . '</' . $tagName . '>';
150 }
151
152 return $xml;
153 }
154 }