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1 |
1 | <?php |
2 | |
3 | namespace MediaWiki\Extension\Math; |
4 | |
5 | use MediaWiki\Extension\Math\Hooks\HookRunner; |
6 | use MediaWiki\Logger\LoggerFactory; |
7 | use MediaWiki\MediaWikiServices; |
8 | use StatusValue; |
9 | |
10 | /** |
11 | * Contains the driver function for the LaTeXML daemon |
12 | * |
13 | * @copyright 2012 Moritz Schubotz |
14 | * @license GPL-2.0-or-later |
15 | */ |
16 | class MathLaTeXML extends MathMathML { |
17 | |
18 | /** @var string[] */ |
19 | protected $defaultAllowedRootElements = [ 'math', 'div', 'table', 'query' ]; |
20 | |
21 | /** @var string settings for LaTeXML daemon */ |
22 | private $LaTeXMLSettings = ''; |
23 | |
24 | /** @inheritDoc */ |
25 | public function __construct( $tex = '', $params = [], $cache = null ) { |
26 | global $wgMathLaTeXMLUrl; |
27 | parent::__construct( $tex, $params, $cache ); |
28 | $this->host = $wgMathLaTeXMLUrl; |
29 | $this->setMode( MathConfig::MODE_LATEXML ); |
30 | } |
31 | |
32 | /** |
33 | * Converts an array with LaTeXML settings to a URL encoded String. |
34 | * If the argument is a string the input will be returned. |
35 | * Thus the function has projector properties and can be applied a second time safely. |
36 | * @param string|array $array |
37 | * @return string |
38 | */ |
39 | public function serializeSettings( $array ) { |
40 | if ( !is_array( $array ) ) { |
41 | return $array; |
42 | } |
43 | |
44 | // removes the [1] [2]... for the unnamed subarrays since LaTeXML |
45 | // assigns multiple values to one key e.g. |
46 | // preload=amsmath.sty&preload=amsthm.sty&preload=amstext.sty |
47 | $cgi_string = wfArrayToCgi( $array ); |
48 | $cgi_string = preg_replace( '|\%5B\d+\%5D|', '', $cgi_string ); |
49 | $cgi_string = preg_replace( '|&\d+=|', '&', $cgi_string ); |
50 | |
51 | return $cgi_string; |
52 | } |
53 | |
54 | /** |
55 | * Gets the settings for the LaTeXML daemon. |
56 | * @return string |
57 | */ |
58 | public function getLaTeXMLSettings() { |
59 | global $wgMathDefaultLaTeXMLSetting; |
60 | return $this->LaTeXMLSettings ?: $wgMathDefaultLaTeXMLSetting; |
61 | } |
62 | |
63 | /** |
64 | * Sets the settings for the LaTeXML daemon. |
65 | * The settings affect only the current instance of the class. |
66 | * For a list of possible settings see: |
67 | * http://dlmf.nist.gov/LaTeXML/manual/commands/latexmlpost.xhtml |
68 | * An empty value indicates to use the default settings. |
69 | * @param string|array $settings |
70 | */ |
71 | public function setLaTeXMLSettings( $settings ) { |
72 | $this->LaTeXMLSettings = $settings; |
73 | } |
74 | |
75 | /** |
76 | * Calculates the HTTP POST Data for the request. Depends on the settings |
77 | * and the input string only. |
78 | * @return string HTTP POST data |
79 | */ |
80 | public function getPostData() { |
81 | $tex = $this->getTex(); |
82 | if ( $this->getMathStyle() == 'inlineDisplaystyle' ) { |
83 | // In 'inlineDisplaystyle' the old |
84 | // texvc behavior is reproduced: |
85 | // The equation is rendered in displaystyle |
86 | // (texvc used $$ $tex $$ to render) |
87 | // but the equation is not centered. |
88 | $tex = '{\displaystyle ' . $tex . '}'; |
89 | } |
90 | $texcmd = rawurlencode( $tex ); |
91 | $settings = $this->serializeSettings( $this->getLaTeXMLSettings() ); |
92 | $postData = $settings . '&tex=' . $texcmd; |
93 | |
94 | // There is an API-inconsistency between different versions of the LaTeXML daemon |
95 | // some versions require the literal prefix other don't allow it. |
96 | if ( !str_contains( $this->host, '/convert' ) ) { |
97 | $postData = preg_replace( '/&tex=/', '&tex=literal:', $postData, 1 ); |
98 | } |
99 | |
100 | LoggerFactory::getInstance( 'Math' )->debug( 'Get post data: ' . $postData ); |
101 | return $postData; |
102 | } |
103 | |
104 | /** |
105 | * Does the actual web request to convert TeX to MathML. |
106 | * @return StatusValue |
107 | */ |
108 | protected function doRender(): StatusValue { |
109 | if ( trim( $this->getTex() ) === '' ) { |
110 | LoggerFactory::getInstance( 'Math' )->warning( |
111 | 'Rendering was requested, but no TeX string is specified.' ); |
112 | return StatusValue::newFatal( 'math_empty_tex' ); |
113 | } |
114 | $requestStatus = $this->makeRequest(); |
115 | if ( $requestStatus->isGood() ) { |
116 | $jsonResult = json_decode( $requestStatus->getValue() ); |
117 | if ( $jsonResult && json_last_error() === JSON_ERROR_NONE ) { |
118 | if ( $this->isValidMathML( $jsonResult->result ) ) { |
119 | $this->setMathml( $jsonResult->result ); |
120 | // Avoid PHP 7.1 warning from passing $this by reference |
121 | $renderer = $this; |
122 | ( new HookRunner( MediaWikiServices::getInstance()->getHookContainer() ) ) |
123 | ->onMathRenderingResultRetrieved( |
124 | $renderer, $jsonResult |
125 | ); // Enables debugging of server results |
126 | return StatusValue::newGood(); |
127 | } |
128 | |
129 | // Do not print bad mathml. It's probably too verbose and might |
130 | // mess up the browser output. |
131 | LoggerFactory::getInstance( 'Math' ) |
132 | ->warning( 'LaTeXML invalid MathML', [ |
133 | 'post' => $this->getPostData(), |
134 | 'host' => $this->host, |
135 | 'result' => $requestStatus->getValue() |
136 | ] ); |
137 | return StatusValue::newFatal( 'math_invalidxml', $this->getModeName(), $this->host ); |
138 | } |
139 | LoggerFactory::getInstance( 'Math' ) |
140 | ->warning( 'LaTeXML invalid JSON', [ |
141 | 'post' => $this->getPostData(), |
142 | 'host' => $this->host, |
143 | 'res' => $requestStatus->getValue() |
144 | ] ); |
145 | |
146 | return StatusValue::newFatal( $this->getError( 'math_invalidjson', $this->getModeName(), $this->host ) ); |
147 | } else { |
148 | return $requestStatus; |
149 | } |
150 | } |
151 | |
152 | public function getHtmlOutput( bool $svg = true ): string { |
153 | return parent::getHtmlOutput( false ); |
154 | } |
155 | |
156 | /** |
157 | * @return string |
158 | */ |
159 | protected function getMathTableName() { |
160 | return 'mathlatexml'; |
161 | } |
162 | } |
163 | |
164 | class_alias( MathLaTeXML::class, 'MathLaTeXML' ); |