%PDF-
%PDF-
Mini Shell
Mini Shell
import Tokenizer, { QuoteType } from "./Tokenizer.js";
import { fromCodePoint } from "entities/lib/decode.js";
const formTags = new Set([
"input",
"option",
"optgroup",
"select",
"button",
"datalist",
"textarea",
]);
const pTag = new Set(["p"]);
const tableSectionTags = new Set(["thead", "tbody"]);
const ddtTags = new Set(["dd", "dt"]);
const rtpTags = new Set(["rt", "rp"]);
const openImpliesClose = new Map([
["tr", new Set(["tr", "th", "td"])],
["th", new Set(["th"])],
["td", new Set(["thead", "th", "td"])],
["body", new Set(["head", "link", "script"])],
["li", new Set(["li"])],
["p", pTag],
["h1", pTag],
["h2", pTag],
["h3", pTag],
["h4", pTag],
["h5", pTag],
["h6", pTag],
["select", formTags],
["input", formTags],
["output", formTags],
["button", formTags],
["datalist", formTags],
["textarea", formTags],
["option", new Set(["option"])],
["optgroup", new Set(["optgroup", "option"])],
["dd", ddtTags],
["dt", ddtTags],
["address", pTag],
["article", pTag],
["aside", pTag],
["blockquote", pTag],
["details", pTag],
["div", pTag],
["dl", pTag],
["fieldset", pTag],
["figcaption", pTag],
["figure", pTag],
["footer", pTag],
["form", pTag],
["header", pTag],
["hr", pTag],
["main", pTag],
["nav", pTag],
["ol", pTag],
["pre", pTag],
["section", pTag],
["table", pTag],
["ul", pTag],
["rt", rtpTags],
["rp", rtpTags],
["tbody", tableSectionTags],
["tfoot", tableSectionTags],
]);
const voidElements = new Set([
"area",
"base",
"basefont",
"br",
"col",
"command",
"embed",
"frame",
"hr",
"img",
"input",
"isindex",
"keygen",
"link",
"meta",
"param",
"source",
"track",
"wbr",
]);
const foreignContextElements = new Set(["math", "svg"]);
const htmlIntegrationElements = new Set([
"mi",
"mo",
"mn",
"ms",
"mtext",
"annotation-xml",
"foreignobject",
"desc",
"title",
]);
const reNameEnd = /\s|\//;
export class Parser {
constructor(cbs, options = {}) {
var _a, _b, _c, _d, _e;
this.options = options;
/** The start index of the last event. */
this.startIndex = 0;
/** The end index of the last event. */
this.endIndex = 0;
/**
* Store the start index of the current open tag,
* so we can update the start index for attributes.
*/
this.openTagStart = 0;
this.tagname = "";
this.attribname = "";
this.attribvalue = "";
this.attribs = null;
this.stack = [];
this.foreignContext = [];
this.buffers = [];
this.bufferOffset = 0;
/** The index of the last written buffer. Used when resuming after a `pause()`. */
this.writeIndex = 0;
/** Indicates whether the parser has finished running / `.end` has been called. */
this.ended = false;
this.cbs = cbs !== null && cbs !== void 0 ? cbs : {};
this.lowerCaseTagNames = (_a = options.lowerCaseTags) !== null && _a !== void 0 ? _a : !options.xmlMode;
this.lowerCaseAttributeNames =
(_b = options.lowerCaseAttributeNames) !== null && _b !== void 0 ? _b : !options.xmlMode;
this.tokenizer = new ((_c = options.Tokenizer) !== null && _c !== void 0 ? _c : Tokenizer)(this.options, this);
(_e = (_d = this.cbs).onparserinit) === null || _e === void 0 ? void 0 : _e.call(_d, this);
}
// Tokenizer event handlers
/** @internal */
ontext(start, endIndex) {
var _a, _b;
const data = this.getSlice(start, endIndex);
this.endIndex = endIndex - 1;
(_b = (_a = this.cbs).ontext) === null || _b === void 0 ? void 0 : _b.call(_a, data);
this.startIndex = endIndex;
}
/** @internal */
ontextentity(cp) {
var _a, _b;
/*
* Entities can be emitted on the character, or directly after.
* We use the section start here to get accurate indices.
*/
const idx = this.tokenizer.getSectionStart();
this.endIndex = idx - 1;
(_b = (_a = this.cbs).ontext) === null || _b === void 0 ? void 0 : _b.call(_a, fromCodePoint(cp));
this.startIndex = idx;
}
isVoidElement(name) {
return !this.options.xmlMode && voidElements.has(name);
}
/** @internal */
onopentagname(start, endIndex) {
this.endIndex = endIndex;
let name = this.getSlice(start, endIndex);
if (this.lowerCaseTagNames) {
name = name.toLowerCase();
}
this.emitOpenTag(name);
}
emitOpenTag(name) {
var _a, _b, _c, _d;
this.openTagStart = this.startIndex;
this.tagname = name;
const impliesClose = !this.options.xmlMode && openImpliesClose.get(name);
if (impliesClose) {
while (this.stack.length > 0 &&
impliesClose.has(this.stack[this.stack.length - 1])) {
const el = this.stack.pop();
(_b = (_a = this.cbs).onclosetag) === null || _b === void 0 ? void 0 : _b.call(_a, el, true);
}
}
if (!this.isVoidElement(name)) {
this.stack.push(name);
if (foreignContextElements.has(name)) {
this.foreignContext.push(true);
}
else if (htmlIntegrationElements.has(name)) {
this.foreignContext.push(false);
}
}
(_d = (_c = this.cbs).onopentagname) === null || _d === void 0 ? void 0 : _d.call(_c, name);
if (this.cbs.onopentag)
this.attribs = {};
}
endOpenTag(isImplied) {
var _a, _b;
this.startIndex = this.openTagStart;
if (this.attribs) {
(_b = (_a = this.cbs).onopentag) === null || _b === void 0 ? void 0 : _b.call(_a, this.tagname, this.attribs, isImplied);
this.attribs = null;
}
if (this.cbs.onclosetag && this.isVoidElement(this.tagname)) {
this.cbs.onclosetag(this.tagname, true);
}
this.tagname = "";
}
/** @internal */
onopentagend(endIndex) {
this.endIndex = endIndex;
this.endOpenTag(false);
// Set `startIndex` for next node
this.startIndex = endIndex + 1;
}
/** @internal */
onclosetag(start, endIndex) {
var _a, _b, _c, _d, _e, _f;
this.endIndex = endIndex;
let name = this.getSlice(start, endIndex);
if (this.lowerCaseTagNames) {
name = name.toLowerCase();
}
if (foreignContextElements.has(name) ||
htmlIntegrationElements.has(name)) {
this.foreignContext.pop();
}
if (!this.isVoidElement(name)) {
const pos = this.stack.lastIndexOf(name);
if (pos !== -1) {
if (this.cbs.onclosetag) {
let count = this.stack.length - pos;
while (count--) {
// We know the stack has sufficient elements.
this.cbs.onclosetag(this.stack.pop(), count !== 0);
}
}
else
this.stack.length = pos;
}
else if (!this.options.xmlMode && name === "p") {
// Implicit open before close
this.emitOpenTag("p");
this.closeCurrentTag(true);
}
}
else if (!this.options.xmlMode && name === "br") {
// We can't use `emitOpenTag` for implicit open, as `br` would be implicitly closed.
(_b = (_a = this.cbs).onopentagname) === null || _b === void 0 ? void 0 : _b.call(_a, "br");
(_d = (_c = this.cbs).onopentag) === null || _d === void 0 ? void 0 : _d.call(_c, "br", {}, true);
(_f = (_e = this.cbs).onclosetag) === null || _f === void 0 ? void 0 : _f.call(_e, "br", false);
}
// Set `startIndex` for next node
this.startIndex = endIndex + 1;
}
/** @internal */
onselfclosingtag(endIndex) {
this.endIndex = endIndex;
if (this.options.xmlMode ||
this.options.recognizeSelfClosing ||
this.foreignContext[this.foreignContext.length - 1]) {
this.closeCurrentTag(false);
// Set `startIndex` for next node
this.startIndex = endIndex + 1;
}
else {
// Ignore the fact that the tag is self-closing.
this.onopentagend(endIndex);
}
}
closeCurrentTag(isOpenImplied) {
var _a, _b;
const name = this.tagname;
this.endOpenTag(isOpenImplied);
// Self-closing tags will be on the top of the stack
if (this.stack[this.stack.length - 1] === name) {
// If the opening tag isn't implied, the closing tag has to be implied.
(_b = (_a = this.cbs).onclosetag) === null || _b === void 0 ? void 0 : _b.call(_a, name, !isOpenImplied);
this.stack.pop();
}
}
/** @internal */
onattribname(start, endIndex) {
this.startIndex = start;
const name = this.getSlice(start, endIndex);
this.attribname = this.lowerCaseAttributeNames
? name.toLowerCase()
: name;
}
/** @internal */
onattribdata(start, endIndex) {
this.attribvalue += this.getSlice(start, endIndex);
}
/** @internal */
onattribentity(cp) {
this.attribvalue += fromCodePoint(cp);
}
/** @internal */
onattribend(quote, endIndex) {
var _a, _b;
this.endIndex = endIndex;
(_b = (_a = this.cbs).onattribute) === null || _b === void 0 ? void 0 : _b.call(_a, this.attribname, this.attribvalue, quote === QuoteType.Double
? '"'
: quote === QuoteType.Single
? "'"
: quote === QuoteType.NoValue
? undefined
: null);
if (this.attribs &&
!Object.prototype.hasOwnProperty.call(this.attribs, this.attribname)) {
this.attribs[this.attribname] = this.attribvalue;
}
this.attribvalue = "";
}
getInstructionName(value) {
const idx = value.search(reNameEnd);
let name = idx < 0 ? value : value.substr(0, idx);
if (this.lowerCaseTagNames) {
name = name.toLowerCase();
}
return name;
}
/** @internal */
ondeclaration(start, endIndex) {
this.endIndex = endIndex;
const value = this.getSlice(start, endIndex);
if (this.cbs.onprocessinginstruction) {
const name = this.getInstructionName(value);
this.cbs.onprocessinginstruction(`!${name}`, `!${value}`);
}
// Set `startIndex` for next node
this.startIndex = endIndex + 1;
}
/** @internal */
onprocessinginstruction(start, endIndex) {
this.endIndex = endIndex;
const value = this.getSlice(start, endIndex);
if (this.cbs.onprocessinginstruction) {
const name = this.getInstructionName(value);
this.cbs.onprocessinginstruction(`?${name}`, `?${value}`);
}
// Set `startIndex` for next node
this.startIndex = endIndex + 1;
}
/** @internal */
oncomment(start, endIndex, offset) {
var _a, _b, _c, _d;
this.endIndex = endIndex;
(_b = (_a = this.cbs).oncomment) === null || _b === void 0 ? void 0 : _b.call(_a, this.getSlice(start, endIndex - offset));
(_d = (_c = this.cbs).oncommentend) === null || _d === void 0 ? void 0 : _d.call(_c);
// Set `startIndex` for next node
this.startIndex = endIndex + 1;
}
/** @internal */
oncdata(start, endIndex, offset) {
var _a, _b, _c, _d, _e, _f, _g, _h, _j, _k;
this.endIndex = endIndex;
const value = this.getSlice(start, endIndex - offset);
if (this.options.xmlMode || this.options.recognizeCDATA) {
(_b = (_a = this.cbs).oncdatastart) === null || _b === void 0 ? void 0 : _b.call(_a);
(_d = (_c = this.cbs).ontext) === null || _d === void 0 ? void 0 : _d.call(_c, value);
(_f = (_e = this.cbs).oncdataend) === null || _f === void 0 ? void 0 : _f.call(_e);
}
else {
(_h = (_g = this.cbs).oncomment) === null || _h === void 0 ? void 0 : _h.call(_g, `[CDATA[${value}]]`);
(_k = (_j = this.cbs).oncommentend) === null || _k === void 0 ? void 0 : _k.call(_j);
}
// Set `startIndex` for next node
this.startIndex = endIndex + 1;
}
/** @internal */
onend() {
var _a, _b;
if (this.cbs.onclosetag) {
// Set the end index for all remaining tags
this.endIndex = this.startIndex;
for (let i = this.stack.length; i > 0; this.cbs.onclosetag(this.stack[--i], true))
;
}
(_b = (_a = this.cbs).onend) === null || _b === void 0 ? void 0 : _b.call(_a);
}
/**
* Resets the parser to a blank state, ready to parse a new HTML document
*/
reset() {
var _a, _b, _c, _d;
(_b = (_a = this.cbs).onreset) === null || _b === void 0 ? void 0 : _b.call(_a);
this.tokenizer.reset();
this.tagname = "";
this.attribname = "";
this.attribs = null;
this.stack.length = 0;
this.startIndex = 0;
this.endIndex = 0;
(_d = (_c = this.cbs).onparserinit) === null || _d === void 0 ? void 0 : _d.call(_c, this);
this.buffers.length = 0;
this.bufferOffset = 0;
this.writeIndex = 0;
this.ended = false;
}
/**
* Resets the parser, then parses a complete document and
* pushes it to the handler.
*
* @param data Document to parse.
*/
parseComplete(data) {
this.reset();
this.end(data);
}
getSlice(start, end) {
while (start - this.bufferOffset >= this.buffers[0].length) {
this.shiftBuffer();
}
let str = this.buffers[0].slice(start - this.bufferOffset, end - this.bufferOffset);
while (end - this.bufferOffset > this.buffers[0].length) {
this.shiftBuffer();
str += this.buffers[0].slice(0, end - this.bufferOffset);
}
return str;
}
shiftBuffer() {
this.bufferOffset += this.buffers[0].length;
this.writeIndex--;
this.buffers.shift();
}
/**
* Parses a chunk of data and calls the corresponding callbacks.
*
* @param chunk Chunk to parse.
*/
write(chunk) {
var _a, _b;
if (this.ended) {
(_b = (_a = this.cbs).onerror) === null || _b === void 0 ? void 0 : _b.call(_a, new Error(".write() after done!"));
return;
}
this.buffers.push(chunk);
if (this.tokenizer.running) {
this.tokenizer.write(chunk);
this.writeIndex++;
}
}
/**
* Parses the end of the buffer and clears the stack, calls onend.
*
* @param chunk Optional final chunk to parse.
*/
end(chunk) {
var _a, _b;
if (this.ended) {
(_b = (_a = this.cbs).onerror) === null || _b === void 0 ? void 0 : _b.call(_a, Error(".end() after done!"));
return;
}
if (chunk)
this.write(chunk);
this.ended = true;
this.tokenizer.end();
}
/**
* Pauses parsing. The parser won't emit events until `resume` is called.
*/
pause() {
this.tokenizer.pause();
}
/**
* Resumes parsing after `pause` was called.
*/
resume() {
this.tokenizer.resume();
while (this.tokenizer.running &&
this.writeIndex < this.buffers.length) {
this.tokenizer.write(this.buffers[this.writeIndex++]);
}
if (this.ended)
this.tokenizer.end();
}
/**
* Alias of `write`, for backwards compatibility.
*
* @param chunk Chunk to parse.
* @deprecated
*/
parseChunk(chunk) {
this.write(chunk);
}
/**
* Alias of `end`, for backwards compatibility.
*
* @param chunk Optional final chunk to parse.
* @deprecated
*/
done(chunk) {
this.end(chunk);
}
}
//# sourceMappingURL=Parser.js.map
Zerion Mini Shell 1.0