mirror of
https://github.com/vichan-devel/vichan.git
synced 2024-12-11 15:26:08 +01:00
94 lines
2.6 KiB
PHP
94 lines
2.6 KiB
PHP
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<?php
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class JSParser {
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protected $content;
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protected $keywords;
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protected $regs = array();
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protected $regsCounter = 0;
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protected $strings = array();
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protected $stringsCounter = 0;
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protected function _extractRegs($match) {
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$this->regs[$this->regsCounter] = $match[1];
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$id = "<<reg{$this->regsCounter}>>";
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$this->regsCounter++;
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return $id;
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}
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protected function _extractStrings($match) {
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$this->strings[$this->stringsCounter] = $this->importRegExps($match[0]);
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$id = "<<s{$this->stringsCounter}>>";
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$this->stringsCounter++;
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return $id;
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}
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protected function importRegExps($input) {
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$regs = $this->regs;
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return preg_replace_callback("#<<reg(\d+)>>#", function ($match) use($regs) {
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return $regs[$match[1]];
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}, $input);
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}
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protected function importStrings($input) {
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$strings = $this->strings;
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return preg_replace_callback("#<<s(\d+)>>#", function ($match) use($strings) {
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return $strings[$match[1]];
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}, $input);
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}
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public function __construct($file, $keywords = '_') {
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$this->content = file_get_contents($file);
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$this->keywords = (array)$keywords;
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}
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public function parse() {
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$output = htmlspecialchars($this->content, ENT_NOQUOTES);
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// extract reg exps
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$output = preg_replace_callback(
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'# ( / (?: (?>[^/\\\\]++) | \\\\\\\\ | (?<!\\\\)\\\\(?!\\\\) | \\\\/ )+ (?<!\\\\)/ ) [a-z]* \b #ix',
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array($this, '_extractRegs'), $output
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);
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// extract strings
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$output = preg_replace_callback(
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array(
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'# " ( (?: (?>[^"\\\\]++) | \\\\\\\\ | (?<!\\\\)\\\\(?!\\\\) | \\\\" )* ) (?<!\\\\)" #ix',
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"# ' ( (?: (?>[^'\\\\]++) | \\\\\\\\ | (?<!\\\\)\\\\(?!\\\\) | \\\\' )* ) (?<!\\\\)' #ix"
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), array($this, '_extractStrings'), $output
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);
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// delete line comments
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$output = preg_replace("#(//.*?)$#m", '', $output);
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// delete multiline comments
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$output = preg_replace('#/\*(.*?)\*/#is', '', $output);
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$strings = $this->strings;
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$output = preg_replace_callback("#<<s(\d+)>>#", function($match) use($strings) {
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return $strings[$match[1]];
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}, $output);
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$keywords = implode('|', $this->keywords);
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$strings = array();
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// extract func calls
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preg_match_all(
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'# (?:'.$keywords.') \(\\ *" ( (?: (?>[^"\\\\]++) | \\\\\\\\ | (?<!\\\\)\\\\(?!\\\\) | \\\\" )* ) (?<!\\\\)"\\ *\) #ix',
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$output, $matches, PREG_SET_ORDER
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);
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foreach ($matches as $m) $strings[] = stripslashes($m[1]);
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$matches = array();
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preg_match_all(
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"# (?:$keywords) \(\\ *' ( (?: (?>[^'\\\\]++) | \\\\\\\\ | (?<!\\\\)\\\\(?!\\\\) | \\\\' )* ) (?<!\\\\)'\\ *\) #ix",
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$output, $matches, PREG_SET_ORDER
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);
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foreach ($matches as $m) $strings[] = stripslashes($m[1]);
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return $strings;
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}
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}
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?>
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