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20x 20x 36x 36x 2x | /** * This Tokenizer is adapted from htmlparser2 under the MIT License listed at * https://github.com/fb55/htmlparser2/blob/master/LICENSE Copyright 2010, 2011, Chris Winberry <chris@winberry.net>. All rights reserved. Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions: The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software. THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */ import { ErrorCodes } from './errors' import type { ElementNode, Position } from './ast' /** * Note: entities is a non-browser-build-only dependency. * In the browser, we use an HTML element to do the decoding. * Make sure all imports from entities are only used in non-browser branches * so that it can be properly treeshaken. */ import { DecodingMode, EntityDecoder, fromCodePoint, htmlDecodeTree, } from 'entities/lib/decode.js' export enum ParseMode { BASE, HTML, SFC, } export enum CharCodes { Tab = 0x9, // "\t" NewLine = 0xa, // "\n" FormFeed = 0xc, // "\f" CarriageReturn = 0xd, // "\r" Space = 0x20, // " " ExclamationMark = 0x21, // "!" Number = 0x23, // "#" Amp = 0x26, // "&" SingleQuote = 0x27, // "'" DoubleQuote = 0x22, // '"' GraveAccent = 96, // "`" Dash = 0x2d, // "-" Slash = 0x2f, // "/" Zero = 0x30, // "0" Nine = 0x39, // "9" Semi = 0x3b, // ";" Lt = 0x3c, // "<" Eq = 0x3d, // "=" Gt = 0x3e, // ">" Questionmark = 0x3f, // "?" UpperA = 0x41, // "A" LowerA = 0x61, // "a" UpperF = 0x46, // "F" LowerF = 0x66, // "f" UpperZ = 0x5a, // "Z" LowerZ = 0x7a, // "z" LowerX = 0x78, // "x" LowerV = 0x76, // "v" Dot = 0x2e, // "." Colon = 0x3a, // ":" At = 0x40, // "@" LeftSquare = 91, // "[" RightSquare = 93, // "]" } const defaultDelimitersOpen = new Uint8Array([123, 123]) // "{{" const defaultDelimitersClose = new Uint8Array([125, 125]) // "}}" /** All the states the tokenizer can be in. */ export enum State { Text = 1, // interpolation InterpolationOpen, Interpolation, InterpolationClose, // Tags BeforeTagName, // After < InTagName, InSelfClosingTag, BeforeClosingTagName, InClosingTagName, AfterClosingTagName, // Attrs BeforeAttrName, InAttrName, InDirName, InDirArg, InDirDynamicArg, InDirModifier, AfterAttrName, BeforeAttrValue, InAttrValueDq, // " InAttrValueSq, // ' InAttrValueNq, // Declarations BeforeDeclaration, // ! InDeclaration, // Processing instructions InProcessingInstruction, // ? // Comments & CDATA BeforeComment, CDATASequence, InSpecialComment, InCommentLike, // Special tags BeforeSpecialS, // Decide if we deal with `<script` or `<style` BeforeSpecialT, // Decide if we deal with `<title` or `<textarea` SpecialStartSequence, InRCDATA, InEntity, InSFCRootTagName, } /** * HTML only allows ASCII alpha characters (a-z and A-Z) at the beginning of a * tag name. */ function isTagStartChar(c: number): boolean { return ( (c >= CharCodes.LowerA && c <= CharCodes.LowerZ) || (c >= CharCodes.UpperA && c <= CharCodes.UpperZ) ) } export function isWhitespace(c: number): boolean { return ( c === CharCodes.Space || c === CharCodes.NewLine || c === CharCodes.Tab || c === CharCodes.FormFeed || c === CharCodes.CarriageReturn ) } function isEndOfTagSection(c: number): boolean { return c === CharCodes.Slash || c === CharCodes.Gt || isWhitespace(c) } export function toCharCodes(str: string): Uint8Array { const ret = new Uint8Array(str.length) for (let i = 0; i < str.length; i++) { ret[i] = str.charCodeAt(i) } return ret } export enum QuoteType { NoValue = 0, Unquoted = 1, Single = 2, Double = 3, } export interface Callbacks { ontext(start: number, endIndex: number): void ontextentity(char: string, start: number, endIndex: number): void oninterpolation(start: number, endIndex: number): void onopentagname(start: number, endIndex: number): void onopentagend(endIndex: number): void onselfclosingtag(endIndex: number): void onclosetag(start: number, endIndex: number): void onattribdata(start: number, endIndex: number): void onattribentity(char: string, start: number, end: number): void onattribend(quote: QuoteType, endIndex: number): void onattribname(start: number, endIndex: number): void onattribnameend(endIndex: number): void ondirname(start: number, endIndex: number): void ondirarg(start: number, endIndex: number): void ondirmodifier(start: number, endIndex: number): void oncomment(start: number, endIndex: number): void oncdata(start: number, endIndex: number): void onprocessinginstruction(start: number, endIndex: number): void // ondeclaration(start: number, endIndex: number): void onend(): void onerr(code: ErrorCodes, index: number): void } /** * Sequences used to match longer strings. * * We don't have `Script`, `Style`, or `Title` here. Instead, we re-use the *End * sequences with an increased offset. */ export const Sequences: { Cdata: Uint8Array CdataEnd: Uint8Array CommentEnd: Uint8Array ScriptEnd: Uint8Array StyleEnd: Uint8Array TitleEnd: Uint8Array TextareaEnd: Uint8Array } = { Cdata: new Uint8Array([0x43, 0x44, 0x41, 0x54, 0x41, 0x5b]), // CDATA[ CdataEnd: new Uint8Array([0x5d, 0x5d, 0x3e]), // ]]> CommentEnd: new Uint8Array([0x2d, 0x2d, 0x3e]), // `-->` ScriptEnd: new Uint8Array([0x3c, 0x2f, 0x73, 0x63, 0x72, 0x69, 0x70, 0x74]), // `</script` StyleEnd: new Uint8Array([0x3c, 0x2f, 0x73, 0x74, 0x79, 0x6c, 0x65]), // `</style` TitleEnd: new Uint8Array([0x3c, 0x2f, 0x74, 0x69, 0x74, 0x6c, 0x65]), // `</title` TextareaEnd: new Uint8Array([ 0x3c, 0x2f, 116, 101, 120, 116, 97, 114, 101, 97, ]), // `</textarea } export default class Tokenizer { /** The current state the tokenizer is in. */ public state: State = State.Text /** The read buffer. */ private buffer = '' /** The beginning of the section that is currently being read. */ public sectionStart = 0 /** The index within the buffer that we are currently looking at. */ private index = 0 /** The start of the last entity. */ private entityStart = 0 /** Some behavior, eg. when decoding entities, is done while we are in another state. This keeps track of the other state type. */ private baseState = State.Text /** For special parsing behavior inside of script and style tags. */ public inRCDATA = false /** For disabling RCDATA tags handling */ public inXML = false /** For disabling interpolation parsing in v-pre */ public inVPre = false /** Record newline positions for fast line / column calculation */ private newlines: number[] = [] private readonly entityDecoder?: EntityDecoder public mode: ParseMode = ParseMode.BASE public get inSFCRoot(): boolean { return this.mode === ParseMode.SFC && this.stack.length === 0 } constructor( private readonly stack: ElementNode[], private readonly cbs: Callbacks, ) { if (!__BROWSER__) { this.entityDecoder = new EntityDecoder(htmlDecodeTree, (cp, consumed) => this.emitCodePoint(cp, consumed), ) } } public reset(): void { this.state = State.Text this.mode = ParseMode.BASE this.buffer = '' this.sectionStart = 0 this.index = 0 this.baseState = State.Text this.inRCDATA = false this.currentSequence = undefined! this.newlines.length = 0 this.delimiterOpen = defaultDelimitersOpen this.delimiterClose = defaultDelimitersClose } /** * Generate Position object with line / column information using recorded * newline positions. We know the index is always going to be an already * processed index, so all the newlines up to this index should have been * recorded. */ public getPos(index: number): Position { let line = 1 let column = index + 1 for (let i = this.newlines.length - 1; i >= 0; i--) { const newlineIndex = this.newlines[i] if (index > newlineIndex) { line = i + 2 column = index - newlineIndex break } } return { column, line, offset: index, } } private peek() { return this.buffer.charCodeAt(this.index + 1) } private stateText(c: number): void { if (c === CharCodes.Lt) { if (this.index > this.sectionStart) { this.cbs.ontext(this.sectionStart, this.index) } this.state = State.BeforeTagName this.sectionStart = this.index } else if (!__BROWSER__ && c === CharCodes.Amp) { this.startEntity() } else if (!this.inVPre && c === this.delimiterOpen[0]) { this.state = State.InterpolationOpen this.delimiterIndex = 0 this.stateInterpolationOpen(c) } } public delimiterOpen: Uint8Array = defaultDelimitersOpen public delimiterClose: Uint8Array = defaultDelimitersClose private delimiterIndex = -1 private stateInterpolationOpen(c: number): void { if (c === this.delimiterOpen[this.delimiterIndex]) { if (this.delimiterIndex === this.delimiterOpen.length - 1) { const start = this.index + 1 - this.delimiterOpen.length if (start > this.sectionStart) { this.cbs.ontext(this.sectionStart, start) } this.state = State.Interpolation this.sectionStart = start } else { this.delimiterIndex++ } } else if (this.inRCDATA) { this.state = State.InRCDATA this.stateInRCDATA(c) } else { this.state = State.Text this.stateText(c) } } private stateInterpolation(c: number): void { if (c === this.delimiterClose[0]) { this.state = State.InterpolationClose this.delimiterIndex = 0 this.stateInterpolationClose(c) } } private stateInterpolationClose(c: number) { if (c === this.delimiterClose[this.delimiterIndex]) { if (this.delimiterIndex === this.delimiterClose.length - 1) { this.cbs.oninterpolation(this.sectionStart, this.index + 1) if (this.inRCDATA) { this.state = State.InRCDATA } else { this.state = State.Text } this.sectionStart = this.index + 1 } else { this.delimiterIndex++ } } else { this.state = State.Interpolation this.stateInterpolation(c) } } public currentSequence: Uint8Array = undefined! private sequenceIndex = 0 private stateSpecialStartSequence(c: number): void { const isEnd = this.sequenceIndex === this.currentSequence.length const isMatch = isEnd ? // If we are at the end of the sequence, make sure the tag name has ended isEndOfTagSection(c) : // Otherwise, do a case-insensitive comparison (c | 0x20) === this.currentSequence[this.sequenceIndex] if (!isMatch) { this.inRCDATA = false } else if (!isEnd) { this.sequenceIndex++ return } this.sequenceIndex = 0 this.state = State.InTagName this.stateInTagName(c) } /** Look for an end tag. For <title> and <textarea>, also decode entities. */ private stateInRCDATA(c: number): void { if (this.sequenceIndex === this.currentSequence.length) { if (c === CharCodes.Gt || isWhitespace(c)) { const endOfText = this.index - this.currentSequence.length if (this.sectionStart < endOfText) { // Spoof the index so that reported locations match up. const actualIndex = this.index this.index = endOfText this.cbs.ontext(this.sectionStart, endOfText) this.index = actualIndex } this.sectionStart = endOfText + 2 // Skip over the `</` this.stateInClosingTagName(c) this.inRCDATA = false return // We are done; skip the rest of the function. } this.sequenceIndex = 0 } if ((c | 0x20) === this.currentSequence[this.sequenceIndex]) { this.sequenceIndex += 1 } else if (this.sequenceIndex === 0) { if ( this.currentSequence === Sequences.TitleEnd || (this.currentSequence === Sequences.TextareaEnd && !this.inSFCRoot) ) { // We have to parse entities in <title> and <textarea> tags. if (!__BROWSER__ && c === CharCodes.Amp) { this.startEntity() } else if (!this.inVPre && c === this.delimiterOpen[0]) { // We also need to handle interpolation this.state = State.InterpolationOpen this.delimiterIndex = 0 this.stateInterpolationOpen(c) } } else if (this.fastForwardTo(CharCodes.Lt)) { // Outside of <title> and <textarea> tags, we can fast-forward. this.sequenceIndex = 1 } } else { // If we see a `<`, set the sequence index to 1; useful for eg. `<</script>`. this.sequenceIndex = Number(c === CharCodes.Lt) } } private stateCDATASequence(c: number): void { if (c === Sequences.Cdata[this.sequenceIndex]) { if (++this.sequenceIndex === Sequences.Cdata.length) { this.state = State.InCommentLike this.currentSequence = Sequences.CdataEnd this.sequenceIndex = 0 this.sectionStart = this.index + 1 } } else { this.sequenceIndex = 0 this.state = State.InDeclaration this.stateInDeclaration(c) // Reconsume the character } } /** * When we wait for one specific character, we can speed things up * by skipping through the buffer until we find it. * * @returns Whether the character was found. */ private fastForwardTo(c: number): boolean { while (++this.index < this.buffer.length) { const cc = this.buffer.charCodeAt(this.index) if (cc === CharCodes.NewLine) { this.newlines.push(this.index) } if (cc === c) { return true } } /* * We increment the index at the end of the `parse` loop, * so set it to `buffer.length - 1` here. * * TODO: Refactor `parse` to increment index before calling states. */ this.index = this.buffer.length - 1 return false } /** * Comments and CDATA end with `-->` and `]]>`. * * Their common qualities are: * - Their end sequences have a distinct character they start with. * - That character is then repeated, so we have to check multiple repeats. * - All characters but the start character of the sequence can be skipped. */ private stateInCommentLike(c: number): void { if (c === this.currentSequence[this.sequenceIndex]) { if (++this.sequenceIndex === this.currentSequence.length) { if (this.currentSequence === Sequences.CdataEnd) { this.cbs.oncdata(this.sectionStart, this.index - 2) } else { this.cbs.oncomment(this.sectionStart, this.index - 2) } this.sequenceIndex = 0 this.sectionStart = this.index + 1 this.state = State.Text } } else if (this.sequenceIndex === 0) { // Fast-forward to the first character of the sequence if (this.fastForwardTo(this.currentSequence[0])) { this.sequenceIndex = 1 } } else if (c !== this.currentSequence[this.sequenceIndex - 1]) { // Allow long sequences, eg. --->, ]]]> this.sequenceIndex = 0 } } private startSpecial(sequence: Uint8Array, offset: number) { this.enterRCDATA(sequence, offset) this.state = State.SpecialStartSequence } public enterRCDATA(sequence: Uint8Array, offset: number): void { this.inRCDATA = true this.currentSequence = sequence this.sequenceIndex = offset } private stateBeforeTagName(c: number): void { if (c === CharCodes.ExclamationMark) { this.state = State.BeforeDeclaration this.sectionStart = this.index + 1 } else if (c === CharCodes.Questionmark) { this.state = State.InProcessingInstruction this.sectionStart = this.index + 1 } else if (isTagStartChar(c)) { this.sectionStart = this.index if (this.mode === ParseMode.BASE) { // no special tags in base mode this.state = State.InTagName } else if (this.inSFCRoot) { // SFC mode + root level // - everything except <template> is RAWTEXT // - <template> with lang other than html is also RAWTEXT this.state = State.InSFCRootTagName } else if (!this.inXML) { // HTML mode // - <script>, <style> RAWTEXT // - <title>, <textarea> RCDATA if (c === 116 /* t */) { this.state = State.BeforeSpecialT } else { this.state = c === 115 /* s */ ? State.BeforeSpecialS : State.InTagName } } else { this.state = State.InTagName } } else if (c === CharCodes.Slash) { this.state = State.BeforeClosingTagName } else { this.state = State.Text this.stateText(c) } } private stateInTagName(c: number): void { if (isEndOfTagSection(c)) { this.handleTagName(c) } } private stateInSFCRootTagName(c: number): void { if (isEndOfTagSection(c)) { const tag = this.buffer.slice(this.sectionStart, this.index) if (tag !== 'template') { this.enterRCDATA(toCharCodes(`</` + tag), 0) } this.handleTagName(c) } } private handleTagName(c: number) { this.cbs.onopentagname(this.sectionStart, this.index) this.sectionStart = -1 this.state = State.BeforeAttrName this.stateBeforeAttrName(c) } private stateBeforeClosingTagName(c: number): void { if (isWhitespace(c)) { // Ignore } else if (c === CharCodes.Gt) { if (__DEV__ || !__BROWSER__) { this.cbs.onerr(ErrorCodes.MISSING_END_TAG_NAME, this.index) } this.state = State.Text // Ignore this.sectionStart = this.index + 1 } else { this.state = isTagStartChar(c) ? State.InClosingTagName : State.InSpecialComment this.sectionStart = this.index } } private stateInClosingTagName(c: number): void { if (c === CharCodes.Gt || isWhitespace(c)) { this.cbs.onclosetag(this.sectionStart, this.index) this.sectionStart = -1 this.state = State.AfterClosingTagName this.stateAfterClosingTagName(c) } } private stateAfterClosingTagName(c: number): void { // Skip everything until ">" if (c === CharCodes.Gt) { this.state = State.Text this.sectionStart = this.index + 1 } } private stateBeforeAttrName(c: number): void { if (c === CharCodes.Gt) { this.cbs.onopentagend(this.index) if (this.inRCDATA) { this.state = State.InRCDATA } else { this.state = State.Text } this.sectionStart = this.index + 1 } else if (c === CharCodes.Slash) { this.state = State.InSelfClosingTag if ((__DEV__ || !__BROWSER__) && this.peek() !== CharCodes.Gt) { this.cbs.onerr(ErrorCodes.UNEXPECTED_SOLIDUS_IN_TAG, this.index) } } else if (c === CharCodes.Lt && this.peek() === CharCodes.Slash) { // special handling for </ appearing in open tag state // this is different from standard HTML parsing but makes practical sense // especially for parsing intermediate input state in IDEs. this.cbs.onopentagend(this.index) this.state = State.BeforeTagName this.sectionStart = this.index } else if (!isWhitespace(c)) { if ((__DEV__ || !__BROWSER__) && c === CharCodes.Eq) { this.cbs.onerr( ErrorCodes.UNEXPECTED_EQUALS_SIGN_BEFORE_ATTRIBUTE_NAME, this.index, ) } this.handleAttrStart(c) } } private handleAttrStart(c: number) { if (c === CharCodes.LowerV && this.peek() === CharCodes.Dash) { this.state = State.InDirName this.sectionStart = this.index } else if ( c === CharCodes.Dot || c === CharCodes.Colon || c === CharCodes.At || c === CharCodes.Number ) { this.cbs.ondirname(this.index, this.index + 1) this.state = State.InDirArg this.sectionStart = this.index + 1 } else { this.state = State.InAttrName this.sectionStart = this.index } } private stateInSelfClosingTag(c: number): void { if (c === CharCodes.Gt) { this.cbs.onselfclosingtag(this.index) this.state = State.Text this.sectionStart = this.index + 1 this.inRCDATA = false // Reset special state, in case of self-closing special tags } else if (!isWhitespace(c)) { this.state = State.BeforeAttrName this.stateBeforeAttrName(c) } } private stateInAttrName(c: number): void { if (c === CharCodes.Eq || isEndOfTagSection(c)) { this.cbs.onattribname(this.sectionStart, this.index) this.handleAttrNameEnd(c) } else if ( (__DEV__ || !__BROWSER__) && (c === CharCodes.DoubleQuote || c === CharCodes.SingleQuote || c === CharCodes.Lt) ) { this.cbs.onerr( ErrorCodes.UNEXPECTED_CHARACTER_IN_ATTRIBUTE_NAME, this.index, ) } } private stateInDirName(c: number): void { if (c === CharCodes.Eq || isEndOfTagSection(c)) { this.cbs.ondirname(this.sectionStart, this.index) this.handleAttrNameEnd(c) } else if (c === CharCodes.Colon) { this.cbs.ondirname(this.sectionStart, this.index) this.state = State.InDirArg this.sectionStart = this.index + 1 } else if (c === CharCodes.Dot) { this.cbs.ondirname(this.sectionStart, this.index) this.state = State.InDirModifier this.sectionStart = this.index + 1 } } private stateInDirArg(c: number): void { if (c === CharCodes.Eq || isEndOfTagSection(c)) { this.cbs.ondirarg(this.sectionStart, this.index) this.handleAttrNameEnd(c) } else if (c === CharCodes.LeftSquare) { this.state = State.InDirDynamicArg } else if (c === CharCodes.Dot) { this.cbs.ondirarg(this.sectionStart, this.index) this.state = State.InDirModifier this.sectionStart = this.index + 1 } } private stateInDynamicDirArg(c: number): void { if (c === CharCodes.RightSquare) { this.state = State.InDirArg } else if (c === CharCodes.Eq || isEndOfTagSection(c)) { this.cbs.ondirarg(this.sectionStart, this.index + 1) this.handleAttrNameEnd(c) if (__DEV__ || !__BROWSER__) { this.cbs.onerr( ErrorCodes.X_MISSING_DYNAMIC_DIRECTIVE_ARGUMENT_END, this.index, ) } } } private stateInDirModifier(c: number): void { if (c === CharCodes.Eq || isEndOfTagSection(c)) { this.cbs.ondirmodifier(this.sectionStart, this.index) this.handleAttrNameEnd(c) } else if (c === CharCodes.Dot) { this.cbs.ondirmodifier(this.sectionStart, this.index) this.sectionStart = this.index + 1 } } private handleAttrNameEnd(c: number): void { this.sectionStart = this.index this.state = State.AfterAttrName this.cbs.onattribnameend(this.index) this.stateAfterAttrName(c) } private stateAfterAttrName(c: number): void { if (c === CharCodes.Eq) { this.state = State.BeforeAttrValue } else if (c === CharCodes.Slash || c === CharCodes.Gt) { this.cbs.onattribend(QuoteType.NoValue, this.sectionStart) this.sectionStart = -1 this.state = State.BeforeAttrName this.stateBeforeAttrName(c) } else if (!isWhitespace(c)) { this.cbs.onattribend(QuoteType.NoValue, this.sectionStart) this.handleAttrStart(c) } } private stateBeforeAttrValue(c: number): void { if (c === CharCodes.DoubleQuote) { this.state = State.InAttrValueDq this.sectionStart = this.index + 1 } else if (c === CharCodes.SingleQuote) { this.state = State.InAttrValueSq this.sectionStart = this.index + 1 } else if (!isWhitespace(c)) { this.sectionStart = this.index this.state = State.InAttrValueNq this.stateInAttrValueNoQuotes(c) // Reconsume token } } private handleInAttrValue(c: number, quote: number) { if (c === quote || (__BROWSER__ && this.fastForwardTo(quote))) { this.cbs.onattribdata(this.sectionStart, this.index) this.sectionStart = -1 this.cbs.onattribend( quote === CharCodes.DoubleQuote ? QuoteType.Double : QuoteType.Single, this.index + 1, ) this.state = State.BeforeAttrName } else if (!__BROWSER__ && c === CharCodes.Amp) { this.startEntity() } } private stateInAttrValueDoubleQuotes(c: number): void { this.handleInAttrValue(c, CharCodes.DoubleQuote) } private stateInAttrValueSingleQuotes(c: number): void { this.handleInAttrValue(c, CharCodes.SingleQuote) } private stateInAttrValueNoQuotes(c: number): void { if (isWhitespace(c) || c === CharCodes.Gt) { this.cbs.onattribdata(this.sectionStart, this.index) this.sectionStart = -1 this.cbs.onattribend(QuoteType.Unquoted, this.index) this.state = State.BeforeAttrName this.stateBeforeAttrName(c) } else if ( ((__DEV__ || !__BROWSER__) && c === CharCodes.DoubleQuote) || c === CharCodes.SingleQuote || c === CharCodes.Lt || c === CharCodes.Eq || c === CharCodes.GraveAccent ) { this.cbs.onerr( ErrorCodes.UNEXPECTED_CHARACTER_IN_UNQUOTED_ATTRIBUTE_VALUE, this.index, ) } else if (!__BROWSER__ && c === CharCodes.Amp) { this.startEntity() } } private stateBeforeDeclaration(c: number): void { if (c === CharCodes.LeftSquare) { this.state = State.CDATASequence this.sequenceIndex = 0 } else { this.state = c === CharCodes.Dash ? State.BeforeComment : State.InDeclaration } } private stateInDeclaration(c: number): void { if (c === CharCodes.Gt || this.fastForwardTo(CharCodes.Gt)) { // this.cbs.ondeclaration(this.sectionStart, this.index) this.state = State.Text this.sectionStart = this.index + 1 } } private stateInProcessingInstruction(c: number): void { if (c === CharCodes.Gt || this.fastForwardTo(CharCodes.Gt)) { this.cbs.onprocessinginstruction(this.sectionStart, this.index) this.state = State.Text this.sectionStart = this.index + 1 } } private stateBeforeComment(c: number): void { if (c === CharCodes.Dash) { this.state = State.InCommentLike this.currentSequence = Sequences.CommentEnd // Allow short comments (eg. <!-->) this.sequenceIndex = 2 this.sectionStart = this.index + 1 } else { this.state = State.InDeclaration } } private stateInSpecialComment(c: number): void { if (c === CharCodes.Gt || this.fastForwardTo(CharCodes.Gt)) { this.cbs.oncomment(this.sectionStart, this.index) this.state = State.Text this.sectionStart = this.index + 1 } } private stateBeforeSpecialS(c: number): void { if (c === Sequences.ScriptEnd[3]) { this.startSpecial(Sequences.ScriptEnd, 4) } else if (c === Sequences.StyleEnd[3]) { this.startSpecial(Sequences.StyleEnd, 4) } else { this.state = State.InTagName this.stateInTagName(c) // Consume the token again } } private stateBeforeSpecialT(c: number): void { if (c === Sequences.TitleEnd[3]) { this.startSpecial(Sequences.TitleEnd, 4) } else if (c === Sequences.TextareaEnd[3]) { this.startSpecial(Sequences.TextareaEnd, 4) } else { this.state = State.InTagName this.stateInTagName(c) // Consume the token again } } private startEntity() { if (!__BROWSER__) { this.baseState = this.state this.state = State.InEntity this.entityStart = this.index this.entityDecoder!.startEntity( this.baseState === State.Text || this.baseState === State.InRCDATA ? DecodingMode.Legacy : DecodingMode.Attribute, ) } } private stateInEntity(): void { if (!__BROWSER__) { const length = this.entityDecoder!.write(this.buffer, this.index) // If `length` is positive, we are done with the entity. if (length >= 0) { this.state = this.baseState if (length === 0) { this.index = this.entityStart } } else { // Mark buffer as consumed. this.index = this.buffer.length - 1 } } } /** * Iterates through the buffer, calling the function corresponding to the current state. * * States that are more likely to be hit are higher up, as a performance improvement. */ public parse(input: string): void { this.buffer = input while (this.index < this.buffer.length) { const c = this.buffer.charCodeAt(this.index) if (c === CharCodes.NewLine) { this.newlines.push(this.index) } switch (this.state) { case State.Text: { this.stateText(c) break } case State.InterpolationOpen: { this.stateInterpolationOpen(c) break } case State.Interpolation: { this.stateInterpolation(c) break } case State.InterpolationClose: { this.stateInterpolationClose(c) break } case State.SpecialStartSequence: { this.stateSpecialStartSequence(c) break } case State.InRCDATA: { this.stateInRCDATA(c) break } case State.CDATASequence: { this.stateCDATASequence(c) break } case State.InAttrValueDq: { this.stateInAttrValueDoubleQuotes(c) break } case State.InAttrName: { this.stateInAttrName(c) break } case State.InDirName: { this.stateInDirName(c) break } case State.InDirArg: { this.stateInDirArg(c) break } case State.InDirDynamicArg: { this.stateInDynamicDirArg(c) break } case State.InDirModifier: { this.stateInDirModifier(c) break } case State.InCommentLike: { this.stateInCommentLike(c) break } case State.InSpecialComment: { this.stateInSpecialComment(c) break } case State.BeforeAttrName: { this.stateBeforeAttrName(c) break } case State.InTagName: { this.stateInTagName(c) break } case State.InSFCRootTagName: { this.stateInSFCRootTagName(c) break } case State.InClosingTagName: { this.stateInClosingTagName(c) break } case State.BeforeTagName: { this.stateBeforeTagName(c) break } case State.AfterAttrName: { this.stateAfterAttrName(c) break } case State.InAttrValueSq: { this.stateInAttrValueSingleQuotes(c) break } case State.BeforeAttrValue: { this.stateBeforeAttrValue(c) break } case State.BeforeClosingTagName: { this.stateBeforeClosingTagName(c) break } case State.AfterClosingTagName: { this.stateAfterClosingTagName(c) break } case State.BeforeSpecialS: { this.stateBeforeSpecialS(c) break } case State.BeforeSpecialT: { this.stateBeforeSpecialT(c) break } case State.InAttrValueNq: { this.stateInAttrValueNoQuotes(c) break } case State.InSelfClosingTag: { this.stateInSelfClosingTag(c) break } case State.InDeclaration: { this.stateInDeclaration(c) break } case State.BeforeDeclaration: { this.stateBeforeDeclaration(c) break } case State.BeforeComment: { this.stateBeforeComment(c) break } case State.InProcessingInstruction: { this.stateInProcessingInstruction(c) break } case State.InEntity: { this.stateInEntity() break } } this.index++ } this.cleanup() this.finish() } /** * Remove data that has already been consumed from the buffer. */ private cleanup() { // If we are inside of text or attributes, emit what we already have. if (this.sectionStart !== this.index) { if ( this.state === State.Text || (this.state === State.InRCDATA && this.sequenceIndex === 0) ) { this.cbs.ontext(this.sectionStart, this.index) this.sectionStart = this.index } else if ( this.state === State.InAttrValueDq || this.state === State.InAttrValueSq || this.state === State.InAttrValueNq ) { this.cbs.onattribdata(this.sectionStart, this.index) this.sectionStart = this.index } } } private finish() { if (!__BROWSER__ && this.state === State.InEntity) { this.entityDecoder!.end() this.state = this.baseState } this.handleTrailingData() this.cbs.onend() } /** Handle any trailing data. */ private handleTrailingData() { const endIndex = this.buffer.length // If there is no remaining data, we are done. if (this.sectionStart >= endIndex) { return } if (this.state === State.InCommentLike) { if (this.currentSequence === Sequences.CdataEnd) { this.cbs.oncdata(this.sectionStart, endIndex) } else { this.cbs.oncomment(this.sectionStart, endIndex) } } else if ( this.state === State.InTagName || this.state === State.BeforeAttrName || this.state === State.BeforeAttrValue || this.state === State.AfterAttrName || this.state === State.InAttrName || this.state === State.InDirName || this.state === State.InDirArg || this.state === State.InDirDynamicArg || this.state === State.InDirModifier || this.state === State.InAttrValueSq || this.state === State.InAttrValueDq || this.state === State.InAttrValueNq || this.state === State.InClosingTagName ) { /* * If we are currently in an opening or closing tag, us not calling the * respective callback signals that the tag should be ignored. */ } else { this.cbs.ontext(this.sectionStart, endIndex) } } private emitCodePoint(cp: number, consumed: number): void { if (!__BROWSER__) { if (this.baseState !== State.Text && this.baseState !== State.InRCDATA) { if (this.sectionStart < this.entityStart) { this.cbs.onattribdata(this.sectionStart, this.entityStart) } this.sectionStart = this.entityStart + consumed this.index = this.sectionStart - 1 this.cbs.onattribentity( fromCodePoint(cp), this.entityStart, this.sectionStart, ) } else { if (this.sectionStart < this.entityStart) { this.cbs.ontext(this.sectionStart, this.entityStart) } this.sectionStart = this.entityStart + consumed this.index = this.sectionStart - 1 this.cbs.ontextentity( fromCodePoint(cp), this.entityStart, this.sectionStart, ) } } } } |