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1 | <?php |
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2 | /** |
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3 | * phpDocumentor |
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4 | * |
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5 | * PHP Version 5.3 |
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6 | * |
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7 | * @copyright 2010-2011 Mike van Riel / Naenius (http://www.naenius.com) |
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8 | * @license http://www.opensource.org/licenses/mit-license.php MIT |
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9 | * @link http://phpdoc.org |
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10 | */ |
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11 | |||
12 | namespace phpDocumentor\Plugin\Core\Transformer\Writer; |
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13 | |||
14 | use Monolog\Logger; |
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15 | use phpDocumentor\Application; |
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16 | use phpDocumentor\Descriptor\ProjectDescriptor; |
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17 | use phpDocumentor\Event\Dispatcher; |
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18 | use phpDocumentor\Plugin\Core\Exception; |
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19 | use phpDocumentor\Transformer\Event\PreXslWriterEvent; |
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20 | use phpDocumentor\Transformer\Router\ForFileProxy; |
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21 | use phpDocumentor\Transformer\Router\Queue; |
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22 | use phpDocumentor\Transformer\Transformation; |
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23 | use phpDocumentor\Transformer\Transformation as TransformationObject; |
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24 | use phpDocumentor\Transformer\Writer\Exception\RequirementMissing; |
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25 | use phpDocumentor\Transformer\Writer\Routable; |
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26 | use phpDocumentor\Transformer\Writer\WriterAbstract; |
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27 | |||
28 | /** |
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29 | * XSL transformation writer; generates static HTML out of the structure and XSL templates. |
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30 | */ |
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31 | class Xsl extends WriterAbstract implements Routable |
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32 | { |
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33 | /** @var \Monolog\Logger $logger */ |
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34 | protected $logger; |
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35 | |||
36 | /** @var string[] */ |
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37 | protected $xsl_variables = array(); |
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38 | |||
39 | /** @var Queue */ |
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40 | private $routers; |
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41 | |||
42 | /** |
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43 | * Initialize this writer with the logger so that it can output logs. |
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44 | * |
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45 | * @param Logger $logger |
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46 | */ |
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47 | public function __construct(Logger $logger) |
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48 | { |
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49 | $this->logger = $logger; |
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50 | } |
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51 | |||
52 | /** |
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53 | * Checks whether XSL handling is enabled with PHP as that is not enabled by default. |
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54 | * |
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55 | * To enable XSL handling you need either the xsl extension or the xslcache extension installed. |
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56 | * |
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57 | * @throws RequirementMissing if neither xsl extensions are installed. |
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58 | * |
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59 | * @return void |
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60 | */ |
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61 | public function checkRequirements() |
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62 | { |
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63 | if (!class_exists('XSLTProcessor') && (!extension_loaded('xslcache'))) { |
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64 | throw new RequirementMissing( |
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65 | 'The XSL writer was unable to find your XSLTProcessor; ' |
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66 | . 'please check if you have installed the PHP XSL extension or XSLCache extension' |
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67 | ); |
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68 | } |
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69 | } |
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70 | |||
71 | /** |
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72 | * Sets the routers that can be used to determine the path of links. |
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73 | * |
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74 | * @param Queue $routers |
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75 | * |
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76 | * @return void |
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77 | */ |
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78 | public function setRouters(Queue $routers) |
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79 | { |
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80 | $this->routers = $routers; |
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81 | } |
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82 | |||
83 | /** |
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84 | * This method combines the structure.xml and the given target template |
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85 | * and creates a static html page at the artifact location. |
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86 | * |
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87 | * @param ProjectDescriptor $project Document containing the structure. |
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88 | * @param Transformation $transformation Transformation to execute. |
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89 | * |
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90 | * @throws \RuntimeException if the structure.xml file could not be found. |
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91 | * @throws Exception if the structure.xml file's documentRoot could not be read because of encoding issues |
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92 | * or because it was absent. |
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93 | * |
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94 | * @return void |
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95 | */ |
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96 | public function transform(ProjectDescriptor $project, Transformation $transformation) |
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97 | { |
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98 | $structure = $this->loadAst($this->getAstPath($transformation)); |
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99 | |||
100 | $proc = $this->getXslProcessor($transformation); |
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101 | $proc->registerPHPFunctions(); |
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102 | $this->registerDefaultVariables($transformation, $proc, $structure); |
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103 | $this->setProcessorParameters($transformation, $proc); |
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104 | |||
105 | $artifact = $this->getArtifactPath($transformation); |
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106 | |||
107 | $this->checkForSpacesInPath($artifact); |
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108 | |||
109 | // if a query is given, then apply a transformation to the artifact |
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110 | // location by replacing ($<var>} with the sluggified node-value of the |
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111 | // search result |
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112 | if ($transformation->getQuery() !== '') { |
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113 | $xpath = new \DOMXPath($structure); |
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114 | |||
115 | /** @var \DOMNodeList $qry */ |
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116 | $qry = $xpath->query($transformation->getQuery()); |
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117 | $count = $qry->length; |
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118 | foreach ($qry as $key => $element) { |
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119 | Dispatcher::getInstance()->dispatch( |
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120 | 'transformer.writer.xsl.pre', |
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121 | PreXslWriterEvent::createInstance($this)->setElement($element)->setProgress(array($key+1, $count)) |
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122 | ); |
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123 | |||
124 | $proc->setParameter('', $element->nodeName, $element->nodeValue); |
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125 | $file_name = $transformation->getTransformer()->generateFilename( |
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126 | $element->nodeValue |
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127 | ); |
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128 | |||
129 | if (! $artifact) { |
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130 | $url = $this->generateUrlForXmlElement($project, $element); |
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131 | if ($url === false || $url[0] !== DIRECTORY_SEPARATOR) { |
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132 | continue; |
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133 | } |
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134 | |||
135 | $filename = $transformation->getTransformer()->getTarget() |
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136 | . str_replace('/', DIRECTORY_SEPARATOR, $url); |
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137 | } else { |
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138 | $filename = str_replace('{$' . $element->nodeName . '}', $file_name, $artifact); |
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139 | } |
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140 | |||
141 | $relativeFileName = substr($filename, strlen($transformation->getTransformer()->getTarget()) + 1); |
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142 | $proc->setParameter('', 'root', str_repeat('../', substr_count($relativeFileName, '/'))); |
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143 | |||
144 | $this->writeToFile($filename, $proc, $structure); |
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145 | } |
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146 | } else { |
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147 | if (substr($transformation->getArtifact(), 0, 1) == '$') { |
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148 | // not a file, it must become a variable! |
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149 | $variable_name = substr($transformation->getArtifact(), 1); |
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150 | $this->xsl_variables[$variable_name] = $proc->transformToXml($structure); |
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151 | } else { |
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152 | $relativeFileName = substr($artifact, strlen($transformation->getTransformer()->getTarget()) + 1); |
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153 | $proc->setParameter('', 'root', str_repeat('../', substr_count($relativeFileName, '/'))); |
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154 | |||
155 | $this->writeToFile($artifact, $proc, $structure); |
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156 | } |
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157 | } |
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158 | } |
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159 | |||
160 | /** |
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161 | * Takes the filename and converts it into a correct URI for XSLTProcessor. |
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162 | * |
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163 | * @param string $filename |
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164 | * |
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165 | * @return string |
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166 | */ |
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167 | protected function getXsltUriFromFilename($filename) |
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168 | { |
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169 | // Windows requires an additional / after the scheme. If not provided then errno 22 (I/O Error: Invalid |
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170 | // Argument) will be raised. Thanks to @FnTmLV for finding the cause. See issue #284 for more information. |
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171 | // An exception to the above is when running from a Phar file; in this case the stream is handled as if on |
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172 | // linux; see issue #713 for more information on this exception. |
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173 | if (strtoupper(substr(PHP_OS, 0, 3)) == 'WIN' && ! \Phar::running()) { |
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174 | $filename = '/' . $filename; |
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175 | } |
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176 | |||
177 | return 'file://' . $filename; |
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178 | } |
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179 | |||
180 | /** |
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181 | * Sets the parameters of the XSLT processor. |
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182 | * |
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183 | * @param TransformationObject $transformation Transformation. |
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184 | * @param \XSLTProcessor $proc XSLTProcessor. |
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185 | * |
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186 | * @return void |
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187 | */ |
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188 | public function setProcessorParameters(TransformationObject $transformation, $proc) |
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189 | { |
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190 | foreach ($this->xsl_variables as $key => $variable) { |
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191 | // XSL does not allow both single and double quotes in a string |
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192 | if ((strpos($variable, '"') !== false) |
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193 | && ((strpos($variable, "'") !== false)) |
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194 | ) { |
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195 | $this->logger->warning( |
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196 | 'XSLT does not allow both double and single quotes in ' |
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197 | . 'a variable; transforming single quotes to a character ' |
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198 | . 'encoded version in variable: ' . $key |
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199 | ); |
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200 | $variable = str_replace("'", "'", $variable); |
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201 | } |
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202 | |||
203 | $proc->setParameter('', $key, $variable); |
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204 | } |
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205 | |||
206 | // add / overwrite the parameters with those defined in the |
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207 | // transformation entry |
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208 | $parameters = $transformation->getParameters(); |
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209 | if (isset($parameters['variables'])) { |
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210 | /** @var \DOMElement $variable */ |
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211 | foreach ($parameters['variables'] as $key => $value) { |
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212 | $proc->setParameter('', $key, $value); |
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213 | } |
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214 | } |
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215 | } |
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216 | |||
217 | /** |
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218 | * |
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219 | * |
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220 | * @param Transformation $transformation |
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221 | * |
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222 | * @return \XSLTCache|\XSLTProcessor |
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223 | */ |
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224 | protected function getXslProcessor(Transformation $transformation) |
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225 | { |
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226 | $xslTemplatePath = $transformation->getSourceAsPath(); |
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227 | $this->logger->debug('Loading XSL template: ' . $xslTemplatePath); |
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228 | if (!file_exists($xslTemplatePath)) { |
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229 | throw new Exception('Unable to find XSL template "' . $xslTemplatePath . '"'); |
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230 | } |
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231 | |||
232 | if (extension_loaded('xslcache')) { |
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233 | $proc = new \XSLTCache(); |
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234 | $proc->importStyleSheet($xslTemplatePath, true); |
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235 | |||
236 | return $proc; |
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237 | } else { |
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238 | $xsl = new \DOMDocument(); |
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239 | $xsl->load($xslTemplatePath); |
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240 | |||
241 | $proc = new \XSLTProcessor(); |
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242 | $proc->importStyleSheet($xsl); |
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243 | |||
244 | return $proc; |
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245 | } |
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246 | } |
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247 | |||
248 | /** |
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249 | * @param $structureFilename |
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250 | * @return \DOMDocument |
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251 | */ |
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252 | private function loadAst($structureFilename) |
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253 | { |
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254 | if (!is_readable($structureFilename)) { |
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255 | throw new \RuntimeException( |
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256 | 'Structure.xml file was not found in the target directory, is the XML writer missing from the ' |
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257 | . 'template definition?' |
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258 | ); |
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259 | } |
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260 | |||
261 | $structure = new \DOMDocument('1.0', 'utf-8'); |
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262 | libxml_use_internal_errors(true); |
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263 | $structure->load($structureFilename); |
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264 | |||
265 | if (empty($structure->documentElement)) { |
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266 | $message = 'Specified DOMDocument lacks documentElement, cannot transform.'; |
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267 | $error = libxml_get_last_error(); |
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268 | if ($error) { |
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269 | $message .= PHP_EOL . 'Apparently an error occurred with reading the structure.xml file, the reported ' |
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270 | . 'error was "' . trim($error->message) . '" on line ' . $error->line; |
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271 | } |
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272 | throw new Exception($message); |
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273 | } |
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274 | |||
275 | return $structure; |
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276 | } |
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277 | |||
278 | /** |
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279 | * @param Transformation $transformation |
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280 | * @param $proc |
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281 | * @param $structure |
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282 | */ |
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283 | private function registerDefaultVariables(Transformation $transformation, $proc, $structure) |
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284 | { |
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285 | $proc->setParameter('', 'title', $structure->documentElement->getAttribute('title')); |
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286 | |||
287 | if ($transformation->getParameter('search') !== null && $transformation->getParameter('search')->getValue()) { |
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288 | $proc->setParameter('', 'search_template', $transformation->getParameter('search')->getValue()); |
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289 | } else { |
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290 | $proc->setParameter('', 'search_template', 'none'); |
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291 | } |
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292 | |||
293 | $proc->setParameter('', 'version', Application::$VERSION); |
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294 | $proc->setParameter('', 'generated_datetime', date('r')); |
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295 | } |
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296 | |||
297 | /** |
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298 | * @param $filename |
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299 | * @param $proc |
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300 | * @param $structure |
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301 | */ |
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302 | private function writeToFile($filename, $proc, $structure) |
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303 | { |
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304 | if (!file_exists(dirname($filename))) { |
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305 | mkdir(dirname($filename), 0755, true); |
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306 | } |
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307 | $proc->transformToURI($structure, $this->getXsltUriFromFilename($filename)); |
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308 | } |
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309 | |||
310 | /** |
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311 | * @param Transformation $transformation |
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312 | * @return string |
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313 | */ |
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314 | private function getAstPath(Transformation $transformation) |
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315 | { |
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316 | return $transformation->getTransformer()->getTarget() . DIRECTORY_SEPARATOR . 'structure.xml'; |
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317 | } |
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318 | |||
319 | /** |
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320 | * Returns the path to the location where the artifact should be written, or null to automatically detect the |
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321 | * location using the router. |
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322 | * |
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323 | * @param Transformation $transformation |
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324 | * |
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325 | * @return string|null |
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326 | */ |
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327 | private function getArtifactPath(Transformation $transformation) |
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328 | { |
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329 | return $transformation->getArtifact() |
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330 | ? $transformation->getTransformer()->getTarget() . DIRECTORY_SEPARATOR . $transformation->getArtifact() |
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331 | : null; |
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332 | } |
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333 | |||
334 | /** |
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335 | * @param ProjectDescriptor $project |
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336 | * @param $element |
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337 | * @return false|string |
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338 | */ |
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339 | private function generateUrlForXmlElement(ProjectDescriptor $project, $element) |
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340 | { |
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341 | $elements = $project->getIndexes()->get('elements'); |
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342 | |||
343 | $elementFqcn = ($element->parentNode->nodeName === 'namespace' ? '~\\' : '') . $element->nodeValue; |
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344 | $node = $elements[$elementFqcn] |
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345 | ?? $element->nodeValue; // do not use the normalized version if the element is not found! |
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346 | |||
347 | $rule = $this->routers->match($node); |
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348 | if (!$rule) { |
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349 | throw new \InvalidArgumentException( |
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350 | 'No matching routing rule could be found for the given node, please provide an artifact location, ' |
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351 | . 'encountered: ' . ($node === null ? 'NULL' : get_class($node)) |
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352 | ); |
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353 | } |
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354 | |||
355 | $rule = new ForFileProxy($rule); |
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356 | $url = $rule->generate($node); |
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357 | |||
358 | return $url; |
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359 | } |
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360 | } |
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361 |
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