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3401f26 | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 | import { getCodePoint, XML_BITSET_VALUE } from "./escape.js";
import { htmlTrie } from "./generated/encode-html.js";
/**
* We store the characters to consider as a compact bitset for fast lookups.
*/
const HTML_BITSET = /* #__PURE__ */ new Uint32Array([
0x16_00, // Bits for 09,0A,0C
0xfc_00_ff_fe, // 32..63 -> 21-2D (minus space), 2E,2F,3A-3F
0xf8_00_00_01, // 64..95 -> 40, 5B-5F
0x38_00_00_01, // 96..127-> 60, 7B-7D
]);
const XML_BITSET = /* #__PURE__ */ new Uint32Array([0, XML_BITSET_VALUE, 0, 0]);
/**
* Encodes all characters in the input using HTML entities. This includes
* characters that are valid ASCII characters in HTML documents, such as `#`.
*
* To get a more compact output, consider using the `encodeNonAsciiHTML`
* function, which will only encode characters that are not valid in HTML
* documents, as well as non-ASCII characters.
*
* If a character has no equivalent entity, a numeric hexadecimal reference
* (eg. `ü`) will be used.
* @param input Input string to encode or decode.
*/
export function encodeHTML(input: string): string {
return encodeHTMLTrieRe(HTML_BITSET, input);
}
/**
* Encodes all non-ASCII characters, as well as characters not valid in HTML
* documents using HTML entities. This function will not encode characters that
* are valid in HTML documents, such as `#`.
*
* If a character has no equivalent entity, a numeric hexadecimal reference
* (eg. `ü`) will be used.
* @param input Input string to encode or decode.
*/
export function encodeNonAsciiHTML(input: string): string {
return encodeHTMLTrieRe(XML_BITSET, input);
}
function encodeHTMLTrieRe(bitset: Uint32Array, input: string): string {
let out: string | undefined;
let last = 0; // Start of the next untouched slice.
const { length } = input;
for (let index = 0; index < length; index++) {
const char = input.charCodeAt(index);
// Skip ASCII characters that don't need encoding
if (char < 0x80 && !((bitset[char >>> 5] >>> char) & 1)) {
continue;
}
if (out === undefined) out = input.substring(0, index);
else if (last !== index) out += input.substring(last, index);
let node = htmlTrie.get(char);
if (typeof node === "object") {
if (index + 1 < length) {
const nextChar = input.charCodeAt(index + 1);
const value =
typeof node.next === "number"
? node.next === nextChar
? node.nextValue
: undefined
: node.next.get(nextChar);
if (value !== undefined) {
out += value;
index++;
last = index + 1;
continue;
}
}
node = node.value;
}
if (node === undefined) {
const cp = getCodePoint(input, index);
out += `&#x${cp.toString(16)};`;
if (cp !== char) index++;
last = index + 1;
} else {
out += node;
last = index + 1;
}
}
if (out === undefined) return input;
if (last < length) out += input.substr(last);
return out;
}
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