|
|
/*! https://mths.be/cssesc v3.0.0 by @mathias */
|
|
|
'use strict';
|
|
|
|
|
|
var object = {};
|
|
|
var hasOwnProperty = object.hasOwnProperty;
|
|
|
var merge = function merge(options, defaults) {
|
|
|
if (!options) {
|
|
|
return defaults;
|
|
|
}
|
|
|
var result = {};
|
|
|
for (var key in defaults) {
|
|
|
// `if (defaults.hasOwnProperty(key) { … }` is not needed here, since
|
|
|
// only recognized option names are used.
|
|
|
result[key] = hasOwnProperty.call(options, key) ? options[key] : defaults[key];
|
|
|
}
|
|
|
return result;
|
|
|
};
|
|
|
|
|
|
var regexAnySingleEscape = /[ -,\.\/:-@\[-\^`\{-~]/;
|
|
|
var regexSingleEscape = /[ -,\.\/:-@\[\]\^`\{-~]/;
|
|
|
var regexAlwaysEscape = /['"\\]/;
|
|
|
var regexExcessiveSpaces = /(^|\\+)?(\\[A-F0-9]{1,6})\x20(?![a-fA-F0-9\x20])/g;
|
|
|
|
|
|
// https://mathiasbynens.be/notes/css-escapes#css
|
|
|
var cssesc = function cssesc(string, options) {
|
|
|
options = merge(options, cssesc.options);
|
|
|
if (options.quotes != 'single' && options.quotes != 'double') {
|
|
|
options.quotes = 'single';
|
|
|
}
|
|
|
var quote = options.quotes == 'double' ? '"' : '\'';
|
|
|
var isIdentifier = options.isIdentifier;
|
|
|
|
|
|
var firstChar = string.charAt(0);
|
|
|
var output = '';
|
|
|
var counter = 0;
|
|
|
var length = string.length;
|
|
|
while (counter < length) {
|
|
|
var character = string.charAt(counter++);
|
|
|
var codePoint = character.charCodeAt();
|
|
|
var value = void 0;
|
|
|
// If it’s not a printable ASCII character…
|
|
|
if (codePoint < 0x20 || codePoint > 0x7E) {
|
|
|
if (codePoint >= 0xD800 && codePoint <= 0xDBFF && counter < length) {
|
|
|
// It’s a high surrogate, and there is a next character.
|
|
|
var extra = string.charCodeAt(counter++);
|
|
|
if ((extra & 0xFC00) == 0xDC00) {
|
|
|
// next character is low surrogate
|
|
|
codePoint = ((codePoint & 0x3FF) << 10) + (extra & 0x3FF) + 0x10000;
|
|
|
} else {
|
|
|
// It’s an unmatched surrogate; only append this code unit, in case
|
|
|
// the next code unit is the high surrogate of a surrogate pair.
|
|
|
counter--;
|
|
|
}
|
|
|
}
|
|
|
value = '\\' + codePoint.toString(16).toUpperCase() + ' ';
|
|
|
} else {
|
|
|
if (options.escapeEverything) {
|
|
|
if (regexAnySingleEscape.test(character)) {
|
|
|
value = '\\' + character;
|
|
|
} else {
|
|
|
value = '\\' + codePoint.toString(16).toUpperCase() + ' ';
|
|
|
}
|
|
|
} else if (/[\t\n\f\r\x0B]/.test(character)) {
|
|
|
value = '\\' + codePoint.toString(16).toUpperCase() + ' ';
|
|
|
} else if (character == '\\' || !isIdentifier && (character == '"' && quote == character || character == '\'' && quote == character) || isIdentifier && regexSingleEscape.test(character)) {
|
|
|
value = '\\' + character;
|
|
|
} else {
|
|
|
value = character;
|
|
|
}
|
|
|
}
|
|
|
output += value;
|
|
|
}
|
|
|
|
|
|
if (isIdentifier) {
|
|
|
if (/^-[-\d]/.test(output)) {
|
|
|
output = '\\-' + output.slice(1);
|
|
|
} else if (/\d/.test(firstChar)) {
|
|
|
output = '\\3' + firstChar + ' ' + output.slice(1);
|
|
|
}
|
|
|
}
|
|
|
|
|
|
// Remove spaces after `\HEX` escapes that are not followed by a hex digit,
|
|
|
// since they’re redundant. Note that this is only possible if the escape
|
|
|
// sequence isn’t preceded by an odd number of backslashes.
|
|
|
output = output.replace(regexExcessiveSpaces, function ($0, $1, $2) {
|
|
|
if ($1 && $1.length % 2) {
|
|
|
// It’s not safe to remove the space, so don’t.
|
|
|
return $0;
|
|
|
}
|
|
|
// Strip the space.
|
|
|
return ($1 || '') + $2;
|
|
|
});
|
|
|
|
|
|
if (!isIdentifier && options.wrap) {
|
|
|
return quote + output + quote;
|
|
|
}
|
|
|
return output;
|
|
|
};
|
|
|
|
|
|
// Expose default options (so they can be overridden globally).
|
|
|
cssesc.options = {
|
|
|
'escapeEverything': false,
|
|
|
'isIdentifier': false,
|
|
|
'quotes': 'single',
|
|
|
'wrap': false
|
|
|
};
|
|
|
|
|
|
cssesc.version = '3.0.0';
|
|
|
|
|
|
module.exports = cssesc;
|
