<?php
/** @license MIT
* Copyright 2017 , Dustin Wilson, J. King et al.
* See LICENSE and AUTHORS files for details */
declare(strict_types=1);
namespace MensBeam\HTML;
use MensBeam\Intl\Encoding\UTF8;
trait EscapeString {
protected function escapeString(string $string, bool $attribute = false): string {
# Escaping a string (for the purposes of the algorithm above) consists of
# running the following steps:
# 1. Replace any occurrence of the "& " character by the string "& ".
# 2. Replace any occurrences of the U+00A0 NO-BREAK SPACE character by the
# string " ".
$string = str_replace(['& ', "\u{A0}"], ['& ', ' '], $string);
# 3. If the algorithm was invoked in the attribute mode, replace any
# occurrences of the """ character by the string "" ".
# 4. If the algorithm was not invoked in the attribute mode, replace any
# occurrences of the "< " character by the string "< ", and any
# occurrences of the ">" character by the string "> ".
return ($attribute) ? str_replace('"', '" ', $string) : str_replace(['< ', '>'], ['< ', '> '], $string);
}
protected function coerceName(string $name): string {
// This matches the inverse of the production of NameChar in XML 1.0,
// with the added exclusion of ":" from allowed characters
// See https://www.w3.org/TR/REC-xml/#NT-NameStartChar
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, $m);
foreach (array_unique($m[0], \SORT_STRING) as $c) {
$o = (new UTF8($c))->nextCode();
$esc = "U".str_pad(strtoupper(dechex($o)), 6, "0", \STR_PAD_LEFT);
$name = str_replace($c, $esc, $name);
}
// Apply stricter rules to the first character
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)) {
$c = $m[0];
$o = (new UTF8($c))->nextCode();
$esc = "U".str_pad(strtoupper(dechex($o)), 6, "0", \STR_PAD_LEFT);
$name = $esc.substr($name, strlen($c));
}
return $name;
}
protected function uncoerceName(string $name): string {
preg_match_all('/U[0-9A-F]{6}/', $name, $m);
foreach (array_unique($m[0], \SORT_STRING) as $o) {
$c = UTF8::encode(hexdec(substr($o, 1)));
$name = str_replace($o, $c, $name);
}
return $name;
}
}