mirror of
https://github.com/pierre42100/comunic
synced 2024-09-29 03:22:49 +00:00
69 lines
2.1 KiB
PHP
69 lines
2.1 KiB
PHP
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<?php
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/*
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* LaTeX scanner,
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* brief explanation: we're using the stateful scanner to handle marginally
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* different rulesets in math blocks.
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* We could add in an awful lot of detail, everything is pretty generic right
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* now, we don't look for any specific names or anything, but it'll suffice
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* for basic highlighting.
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*/
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class LuminousLatexScanner extends LuminousStatefulScanner {
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function init() {
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// math states
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$this->add_pattern('displaymath', '/\\$\\$/', '/\\$\\$/');
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// literal '\[' and '\]'
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$this->add_pattern('displaymath', '/\\\\\\[/', '/\\\\\\]/');
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$this->add_pattern('mathmode', '/\\$/', '/\\$/');
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// terminals
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$this->add_pattern('COMMENT', '/%.*/');
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$this->add_pattern('NUMERIC', '/\d+(\.\d+)?\w*/');
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$this->add_pattern('MATH_FUNCTION', '/\\\\(?:[a-z_]\w*|[^\]])/i');
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$this->add_pattern('MATHOP', '/[\\*^\\-=+]+/');
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$this->add_pattern('FUNCTION', '/\\\\(?:[a-z_]\w*|.)/i');
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$this->add_pattern('IDENT', '/[a-z_]\w*/i');
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$this->add_pattern('OPERATOR', '/[\[\]\{\}]+/');
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$math_transition = array('NUMERIC', 'MATH_FUNCTION', 'MATHOP');
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$this->transitions = array(
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'initial' => array('COMMENT', 'OPERATOR', 'displaymath', 'mathmode',
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'FUNCTION', 'IDENT'),
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// omitting initial state defn. makes it transition to everything
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'displaymath' => $math_transition,
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'mathmode' => $math_transition,
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);
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$this->rule_tag_map = array(
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'displaymath' => 'INTERPOLATION',
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'mathmode' => 'INTERPOLATION',
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'MATHOP' => 'OPERATOR',
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'MATH_FUNCTION' => 'VALUE', // arbitrary way to distinguish it from non
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// math mode functions
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);
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}
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public static function guess_language($src, $info) {
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$p = 0.0;
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foreach(array('documentclass', 'usepackage', 'title',
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'maketitle', 'end') as $cmd)
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{
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if (strpos($src, '\\' . $cmd) !== false) $p += 0.1;
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}
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// count the number of backslashes
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$bslashes = substr_count($src, '\\');
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if ($bslashes > $info['num_lines']) {
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$p += 0.1;
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}
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if (substr_count($src, '%') > $info['num_lines']/10) {
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$p += 0.02;
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}
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return $p;
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}
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}
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