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56 lines
2.8 KiB
56 lines
2.8 KiB
<?php
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/** @license MIT
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* Copyright 2017 , Dustin Wilson, J. King et al.
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* See LICENSE and AUTHORS files for details */
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declare(strict_types=1);
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namespace MensBeam\HTML;
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use MensBeam\Intl\Encoding\UTF8;
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trait EscapeString {
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protected function escapeString(string $string, bool $attribute = false): string {
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# Escaping a string (for the purposes of the algorithm above) consists of
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# running the following steps:
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# 1. Replace any occurrence of the "&" character by the string "&".
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# 2. Replace any occurrences of the U+00A0 NO-BREAK SPACE character by the
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# string " ".
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$string = str_replace(['&', "\u{A0}"], ['&', ' '], $string);
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# 3. If the algorithm was invoked in the attribute mode, replace any
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# occurrences of the """ character by the string """.
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# 4. If the algorithm was not invoked in the attribute mode, replace any
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# occurrences of the "<" character by the string "<", and any
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# occurrences of the ">" character by the string ">".
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return ($attribute) ? str_replace('"', '"', $string) : str_replace(['<', '>'], ['<', '>'], $string);
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}
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protected function coerceName(string $name): string {
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// This matches the inverse of the production of NameChar in XML 1.0,
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// with the added exclusion of ":" from allowed characters
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// See https://www.w3.org/TR/REC-xml/#NT-NameStartChar
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preg_match_all('/[^\-\.0-9\x{B7}\x{300}-\x{36F}\x{203F}-\x{2040}A-Za-z_\x{C0}-\x{D6}\x{D8}-\x{F6}\x{F8}-\x{2FF}\x{370}-\x{37D}\x{37F}-\x{1FFF}\x{200C}-\x{200D}\x{2070}-\x{218F}\x{2C00}-\x{2FEF}\x{3001}-\x{D7FF}\x{F900}-\x{FDCF}\x{FDF0}-\x{FFFD}\x{10000}-\x{EFFFF}]/u', $name, $m);
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foreach (array_unique($m[0], \SORT_STRING) as $c) {
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$o = (new UTF8($c))->nextCode();
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$esc = "U".str_pad(strtoupper(dechex($o)), 6, "0", \STR_PAD_LEFT);
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$name = str_replace($c, $esc, $name);
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}
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// Apply stricter rules to the first character
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if (preg_match('/^[^A-Za-z_\x{C0}-\x{D6}\x{D8}-\x{F6}\x{F8}-\x{2FF}\x{370}-\x{37D}\x{37F}-\x{1FFF}\x{200C}-\x{200D}\x{2070}-\x{218F}\x{2C00}-\x{2FEF}\x{3001}-\x{D7FF}\x{F900}-\x{FDCF}\x{FDF0}-\x{FFFD}\x{10000}-\x{EFFFF}]/u', $name, $m)) {
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$c = $m[0];
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$o = (new UTF8($c))->nextCode();
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$esc = "U".str_pad(strtoupper(dechex($o)), 6, "0", \STR_PAD_LEFT);
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$name = $esc.substr($name, strlen($c));
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}
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return $name;
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}
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protected function uncoerceName(string $name): string {
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preg_match_all('/U[0-9A-F]{6}/', $name, $m);
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foreach (array_unique($m[0], \SORT_STRING) as $o) {
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$c = UTF8::encode(hexdec(substr($o, 1)));
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$name = str_replace($o, $c, $name);
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}
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return $name;
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}
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}
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