kopia lustrzana https://github.com/miklobit/TiddlyWiki5
105 wiersze
2.9 KiB
JavaScript
105 wiersze
2.9 KiB
JavaScript
/*\
|
||
title: $:/core/modules/utils/escapecss.js
|
||
type: application/javascript
|
||
module-type: utils
|
||
|
||
Provides CSS.escape() functionality.
|
||
|
||
\*/
|
||
(function(){
|
||
|
||
/*jslint node: true, browser: true */
|
||
/*global $tw: false, window: false */
|
||
"use strict";
|
||
|
||
exports.escapeCSS = (function() {
|
||
// use browser's native CSS.escape() function if available
|
||
if ($tw.browser && window.CSS && window.CSS.escape) {
|
||
return window.CSS.escape;
|
||
}
|
||
|
||
// otherwise, a utility method is provided
|
||
// see also https://drafts.csswg.org/cssom/#serialize-an-identifier
|
||
|
||
/*! https://mths.be/cssescape v1.5.1 by @mathias | MIT license */
|
||
return function(value) {
|
||
if (arguments.length == 0) {
|
||
throw new TypeError('`CSS.escape` requires an argument.');
|
||
}
|
||
var string = String(value);
|
||
var length = string.length;
|
||
var index = -1;
|
||
var codeUnit;
|
||
var result = '';
|
||
var firstCodeUnit = string.charCodeAt(0);
|
||
while (++index < length) {
|
||
codeUnit = string.charCodeAt(index);
|
||
// Note: there’s no need to special-case astral symbols, surrogate
|
||
// pairs, or lone surrogates.
|
||
|
||
// If the character is NULL (U+0000), then the REPLACEMENT CHARACTER
|
||
// (U+FFFD).
|
||
if (codeUnit == 0x0000) {
|
||
result += '\uFFFD';
|
||
continue;
|
||
}
|
||
|
||
if (
|
||
// If the character is in the range [\1-\1F] (U+0001 to U+001F) or is
|
||
// U+007F, […]
|
||
(codeUnit >= 0x0001 && codeUnit <= 0x001F) || codeUnit == 0x007F ||
|
||
// If the character is the first character and is in the range [0-9]
|
||
// (U+0030 to U+0039), […]
|
||
(index == 0 && codeUnit >= 0x0030 && codeUnit <= 0x0039) ||
|
||
// If the character is the second character and is in the range [0-9]
|
||
// (U+0030 to U+0039) and the first character is a `-` (U+002D), […]
|
||
(
|
||
index == 1 &&
|
||
codeUnit >= 0x0030 && codeUnit <= 0x0039 &&
|
||
firstCodeUnit == 0x002D
|
||
)
|
||
) {
|
||
// https://drafts.csswg.org/cssom/#escape-a-character-as-code-point
|
||
result += '\\' + codeUnit.toString(16) + ' ';
|
||
continue;
|
||
}
|
||
|
||
if (
|
||
// If the character is the first character and is a `-` (U+002D), and
|
||
// there is no second character, […]
|
||
index == 0 &&
|
||
length == 1 &&
|
||
codeUnit == 0x002D
|
||
) {
|
||
result += '\\' + string.charAt(index);
|
||
continue;
|
||
}
|
||
|
||
// If the character is not handled by one of the above rules and is
|
||
// greater than or equal to U+0080, is `-` (U+002D) or `_` (U+005F), or
|
||
// is in one of the ranges [0-9] (U+0030 to U+0039), [A-Z] (U+0041 to
|
||
// U+005A), or [a-z] (U+0061 to U+007A), […]
|
||
if (
|
||
codeUnit >= 0x0080 ||
|
||
codeUnit == 0x002D ||
|
||
codeUnit == 0x005F ||
|
||
codeUnit >= 0x0030 && codeUnit <= 0x0039 ||
|
||
codeUnit >= 0x0041 && codeUnit <= 0x005A ||
|
||
codeUnit >= 0x0061 && codeUnit <= 0x007A
|
||
) {
|
||
// the character itself
|
||
result += string.charAt(index);
|
||
continue;
|
||
}
|
||
|
||
// Otherwise, the escaped character.
|
||
// https://drafts.csswg.org/cssom/#escape-a-character
|
||
result += '\\' + string.charAt(index);
|
||
|
||
}
|
||
return result;
|
||
};
|
||
})();
|
||
|
||
})();
|