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