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"use strict";
// https://infra.spec.whatwg.org/#ascii-whitespace
const asciiWhitespaceRe = /^[\t\n\f\r ]$/;
exports.asciiWhitespaceRe = asciiWhitespaceRe;
// https://infra.spec.whatwg.org/#ascii-lowercase
exports.asciiLowercase = (s) => {
const len = s.length;
const out = new Array(len);
for (let i = 0; i < len; i++) {
const code = s.charCodeAt(i);
// If the character is between 'A' (65) and 'Z' (90), convert using bitwise OR with 32
out[i] = code >= 65 && code <= 90 ? String.fromCharCode(code | 32) : s[i];
}
return out.join("");
};
// https://infra.spec.whatwg.org/#ascii-uppercase
exports.asciiUppercase = (s) => {
const len = s.length;
const out = new Array(len);
for (let i = 0; i < len; i++) {
const code = s.charCodeAt(i);
// If the character is between 'a' (97) and 'z' (122), convert using bitwise AND with ~32
out[i] = code >= 97 && code <= 122 ? String.fromCharCode(code & ~32) : s[i];
}
return out.join("");
};
// https://infra.spec.whatwg.org/#strip-newlines
exports.stripNewlines = (s) => {
return s.replace(/[\n\r]+/g, "");
};
// https://infra.spec.whatwg.org/#strip-leading-and-trailing-ascii-whitespace
exports.stripLeadingAndTrailingASCIIWhitespace = (s) => {
return s.replace(/^[ \t\n\f\r]+/, "").replace(/[ \t\n\f\r]+$/, "");
};
// https://infra.spec.whatwg.org/#strip-and-collapse-ascii-whitespace
exports.stripAndCollapseASCIIWhitespace = (s) => {
return s
.replace(/[ \t\n\f\r]+/g, " ")
.replace(/^[ \t\n\f\r]+/, "")
.replace(/[ \t\n\f\r]+$/, "");
};
// https://html.spec.whatwg.org/multipage/infrastructure.html#valid-simple-colour
exports.isValidSimpleColor = (s) => {
return /^#[a-fA-F\d]{6}$/.test(s);
};
// https://infra.spec.whatwg.org/#ascii-case-insensitive
exports.asciiCaseInsensitiveMatch = (a, b) => {
if (a.length !== b.length) {
return false;
}
for (let i = 0; i < a.length; ++i) {
if ((a.charCodeAt(i) | 32) !== (b.charCodeAt(i) | 32)) {
return false;
}
}
return true;
};
// https://html.spec.whatwg.org/multipage/common-microsyntaxes.html#rules-for-parsing-integers
// Error is represented as null.
const parseInteger = (exports.parseInteger = (input) => {
// The implementation here is slightly different from the spec's. We want to use parseInt(), but parseInt() trims
// Unicode whitespace in addition to just ASCII ones, so we make sure that the trimmed prefix contains only ASCII
// whitespace ourselves.
const numWhitespace = input.length - input.trimStart().length;
if (/[^\t\n\f\r ]/.test(input.slice(0, numWhitespace))) {
return null;
}
// We don't allow hexadecimal numbers here.
// eslint-disable-next-line radix
const value = parseInt(input, 10);
if (Number.isNaN(value)) {
return null;
}
// parseInt() returns -0 for "-0". Normalize that here.
return value === 0 ? 0 : value;
});
// https://html.spec.whatwg.org/multipage/common-microsyntaxes.html#rules-for-parsing-non-negative-integers
// Error is represented as null.
exports.parseNonNegativeInteger = (input) => {
const value = parseInteger(input);
if (value === null) {
return null;
}
if (value < 0) {
return null;
}
return value;
};
// https://html.spec.whatwg.org/multipage/common-microsyntaxes.html#valid-floating-point-number
const floatingPointNumRe = /^-?(?:\d+|\d*\.\d+)(?:[eE][-+]?\d+)?$/;
exports.isValidFloatingPointNumber = (str) => floatingPointNumRe.test(str);
// https://html.spec.whatwg.org/multipage/common-microsyntaxes.html#rules-for-parsing-floating-point-number-values
// Error is represented as null.
exports.parseFloatingPointNumber = (str) => {
// The implementation here is slightly different from the spec's. We need to use parseFloat() in order to retain
// accuracy, but parseFloat() trims Unicode whitespace in addition to just ASCII ones, so we make sure that the
// trimmed prefix contains only ASCII whitespace ourselves.
const numWhitespace = str.length - str.trimStart().length;
if (/[^\t\n\f\r ]/.test(str.slice(0, numWhitespace))) {
return null;
}
const parsed = parseFloat(str);
return isFinite(parsed) ? parsed : null;
};
// https://infra.spec.whatwg.org/#split-on-ascii-whitespace
exports.splitOnASCIIWhitespace = (str) => {
let position = 0;
const tokens = [];
while (position < str.length && asciiWhitespaceRe.test(str[position])) {
position++;
}
if (position === str.length) {
return tokens;
}
while (position < str.length) {
const start = position;
while (position < str.length && !asciiWhitespaceRe.test(str[position])) {
position++;
}
tokens.push(str.slice(start, position));
while (position < str.length && asciiWhitespaceRe.test(str[position])) {
position++;
}
}
return tokens;
};
// https://infra.spec.whatwg.org/#split-on-commas
exports.splitOnCommas = (str) => {
let position = 0;
const tokens = [];
while (position < str.length) {
let start = position;
while (position < str.length && str[position] !== ",") {
position++;
}
let end = position;
while (start < str.length && asciiWhitespaceRe.test(str[start])) {
start++;
}
while (end > start && asciiWhitespaceRe.test(str[end - 1])) {
end--;
}
tokens.push(str.slice(start, end));
if (position < str.length) {
position++;
}
}
return tokens;
};
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