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iconFont/node_modules/htmlparser2/lib/esm/Tokenizer.js

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import { htmlDecodeTree, xmlDecodeTree, BinTrieFlags, determineBranch, replaceCodePoint, } from "entities/lib/decode.js";
var CharCodes;
(function (CharCodes) {
CharCodes[CharCodes["Tab"] = 9] = "Tab";
CharCodes[CharCodes["NewLine"] = 10] = "NewLine";
CharCodes[CharCodes["FormFeed"] = 12] = "FormFeed";
CharCodes[CharCodes["CarriageReturn"] = 13] = "CarriageReturn";
CharCodes[CharCodes["Space"] = 32] = "Space";
CharCodes[CharCodes["ExclamationMark"] = 33] = "ExclamationMark";
CharCodes[CharCodes["Num"] = 35] = "Num";
CharCodes[CharCodes["Amp"] = 38] = "Amp";
CharCodes[CharCodes["SingleQuote"] = 39] = "SingleQuote";
CharCodes[CharCodes["DoubleQuote"] = 34] = "DoubleQuote";
CharCodes[CharCodes["Dash"] = 45] = "Dash";
CharCodes[CharCodes["Slash"] = 47] = "Slash";
CharCodes[CharCodes["Zero"] = 48] = "Zero";
CharCodes[CharCodes["Nine"] = 57] = "Nine";
CharCodes[CharCodes["Semi"] = 59] = "Semi";
CharCodes[CharCodes["Lt"] = 60] = "Lt";
CharCodes[CharCodes["Eq"] = 61] = "Eq";
CharCodes[CharCodes["Gt"] = 62] = "Gt";
CharCodes[CharCodes["Questionmark"] = 63] = "Questionmark";
CharCodes[CharCodes["UpperA"] = 65] = "UpperA";
CharCodes[CharCodes["LowerA"] = 97] = "LowerA";
CharCodes[CharCodes["UpperF"] = 70] = "UpperF";
CharCodes[CharCodes["LowerF"] = 102] = "LowerF";
CharCodes[CharCodes["UpperZ"] = 90] = "UpperZ";
CharCodes[CharCodes["LowerZ"] = 122] = "LowerZ";
CharCodes[CharCodes["LowerX"] = 120] = "LowerX";
CharCodes[CharCodes["OpeningSquareBracket"] = 91] = "OpeningSquareBracket";
})(CharCodes || (CharCodes = {}));
/** All the states the tokenizer can be in. */
var State;
(function (State) {
State[State["Text"] = 1] = "Text";
State[State["BeforeTagName"] = 2] = "BeforeTagName";
State[State["InTagName"] = 3] = "InTagName";
State[State["InSelfClosingTag"] = 4] = "InSelfClosingTag";
State[State["BeforeClosingTagName"] = 5] = "BeforeClosingTagName";
State[State["InClosingTagName"] = 6] = "InClosingTagName";
State[State["AfterClosingTagName"] = 7] = "AfterClosingTagName";
// Attributes
State[State["BeforeAttributeName"] = 8] = "BeforeAttributeName";
State[State["InAttributeName"] = 9] = "InAttributeName";
State[State["AfterAttributeName"] = 10] = "AfterAttributeName";
State[State["BeforeAttributeValue"] = 11] = "BeforeAttributeValue";
State[State["InAttributeValueDq"] = 12] = "InAttributeValueDq";
State[State["InAttributeValueSq"] = 13] = "InAttributeValueSq";
State[State["InAttributeValueNq"] = 14] = "InAttributeValueNq";
// Declarations
State[State["BeforeDeclaration"] = 15] = "BeforeDeclaration";
State[State["InDeclaration"] = 16] = "InDeclaration";
// Processing instructions
State[State["InProcessingInstruction"] = 17] = "InProcessingInstruction";
// Comments & CDATA
State[State["BeforeComment"] = 18] = "BeforeComment";
State[State["CDATASequence"] = 19] = "CDATASequence";
State[State["InSpecialComment"] = 20] = "InSpecialComment";
State[State["InCommentLike"] = 21] = "InCommentLike";
// Special tags
State[State["BeforeSpecialS"] = 22] = "BeforeSpecialS";
State[State["SpecialStartSequence"] = 23] = "SpecialStartSequence";
State[State["InSpecialTag"] = 24] = "InSpecialTag";
State[State["BeforeEntity"] = 25] = "BeforeEntity";
State[State["BeforeNumericEntity"] = 26] = "BeforeNumericEntity";
State[State["InNamedEntity"] = 27] = "InNamedEntity";
State[State["InNumericEntity"] = 28] = "InNumericEntity";
State[State["InHexEntity"] = 29] = "InHexEntity";
})(State || (State = {}));
function isWhitespace(c) {
return (c === CharCodes.Space ||
c === CharCodes.NewLine ||
c === CharCodes.Tab ||
c === CharCodes.FormFeed ||
c === CharCodes.CarriageReturn);
}
function isEndOfTagSection(c) {
return c === CharCodes.Slash || c === CharCodes.Gt || isWhitespace(c);
}
function isNumber(c) {
return c >= CharCodes.Zero && c <= CharCodes.Nine;
}
function isASCIIAlpha(c) {
return ((c >= CharCodes.LowerA && c <= CharCodes.LowerZ) ||
(c >= CharCodes.UpperA && c <= CharCodes.UpperZ));
}
function isHexDigit(c) {
return ((c >= CharCodes.UpperA && c <= CharCodes.UpperF) ||
(c >= CharCodes.LowerA && c <= CharCodes.LowerF));
}
export var QuoteType;
(function (QuoteType) {
QuoteType[QuoteType["NoValue"] = 0] = "NoValue";
QuoteType[QuoteType["Unquoted"] = 1] = "Unquoted";
QuoteType[QuoteType["Single"] = 2] = "Single";
QuoteType[QuoteType["Double"] = 3] = "Double";
})(QuoteType || (QuoteType = {}));
/**
* 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.
*/
const Sequences = {
Cdata: new Uint8Array([0x43, 0x44, 0x41, 0x54, 0x41, 0x5b]),
CdataEnd: new Uint8Array([0x5d, 0x5d, 0x3e]),
CommentEnd: new Uint8Array([0x2d, 0x2d, 0x3e]),
ScriptEnd: new Uint8Array([0x3c, 0x2f, 0x73, 0x63, 0x72, 0x69, 0x70, 0x74]),
StyleEnd: new Uint8Array([0x3c, 0x2f, 0x73, 0x74, 0x79, 0x6c, 0x65]),
TitleEnd: new Uint8Array([0x3c, 0x2f, 0x74, 0x69, 0x74, 0x6c, 0x65]), // `</title`
};
export default class Tokenizer {
constructor({ xmlMode = false, decodeEntities = true, }, cbs) {
this.cbs = cbs;
/** The current state the tokenizer is in. */
this.state = State.Text;
/** The read buffer. */
this.buffer = "";
/** The beginning of the section that is currently being read. */
this.sectionStart = 0;
/** The index within the buffer that we are currently looking at. */
this.index = 0;
/** Some behavior, eg. when decoding entities, is done while we are in another state. This keeps track of the other state type. */
this.baseState = State.Text;
/** For special parsing behavior inside of script and style tags. */
this.isSpecial = false;
/** Indicates whether the tokenizer has been paused. */
this.running = true;
/** The offset of the current buffer. */
this.offset = 0;
this.sequenceIndex = 0;
this.trieIndex = 0;
this.trieCurrent = 0;
/** For named entities, the index of the value. For numeric entities, the code point. */
this.entityResult = 0;
this.entityExcess = 0;
this.xmlMode = xmlMode;
this.decodeEntities = decodeEntities;
this.entityTrie = xmlMode ? xmlDecodeTree : htmlDecodeTree;
}
reset() {
this.state = State.Text;
this.buffer = "";
this.sectionStart = 0;
this.index = 0;
this.baseState = State.Text;
this.currentSequence = undefined;
this.running = true;
this.offset = 0;
}
write(chunk) {
this.offset += this.buffer.length;
this.buffer = chunk;
this.parse();
}
end() {
if (this.running)
this.finish();
}
pause() {
this.running = false;
}
resume() {
this.running = true;
if (this.index < this.buffer.length + this.offset) {
this.parse();
}
}
/**
* The current index within all of the written data.
*/
getIndex() {
return this.index;
}
/**
* The start of the current section.
*/
getSectionStart() {
return this.sectionStart;
}
stateText(c) {
if (c === CharCodes.Lt ||
(!this.decodeEntities && this.fastForwardTo(CharCodes.Lt))) {
if (this.index > this.sectionStart) {
this.cbs.ontext(this.sectionStart, this.index);
}
this.state = State.BeforeTagName;
this.sectionStart = this.index;
}
else if (this.decodeEntities && c === CharCodes.Amp) {
this.state = State.BeforeEntity;
}
}
stateSpecialStartSequence(c) {
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.isSpecial = false;
}
else if (!isEnd) {
this.sequenceIndex++;
return;
}
this.sequenceIndex = 0;
this.state = State.InTagName;
this.stateInTagName(c);
}
/** Look for an end tag. For <title> tags, also decode entities. */
stateInSpecialTag(c) {
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.isSpecial = false;
this.sectionStart = endOfText + 2; // Skip over the `</`
this.stateInClosingTagName(c);
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) {
// We have to parse entities in <title> tags.
if (this.decodeEntities && c === CharCodes.Amp) {
this.state = State.BeforeEntity;
}
}
else if (this.fastForwardTo(CharCodes.Lt)) {
// Outside of <title> 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);
}
}
stateCDATASequence(c) {
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.
*/
fastForwardTo(c) {
while (++this.index < this.buffer.length + this.offset) {
if (this.buffer.charCodeAt(this.index - this.offset) === 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 + this.offset - 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.
*/
stateInCommentLike(c) {
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;
}
}
/**
* HTML only allows ASCII alpha characters (a-z and A-Z) at the beginning of a tag name.
*
* XML allows a lot more characters here (@see https://www.w3.org/TR/REC-xml/#NT-NameStartChar).
* We allow anything that wouldn't end the tag.
*/
isTagStartChar(c) {
return this.xmlMode ? !isEndOfTagSection(c) : isASCIIAlpha(c);
}
startSpecial(sequence, offset) {
this.isSpecial = true;
this.currentSequence = sequence;
this.sequenceIndex = offset;
this.state = State.SpecialStartSequence;
}
stateBeforeTagName(c) {
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 (this.isTagStartChar(c)) {
const lower = c | 0x20;
this.sectionStart = this.index;
if (!this.xmlMode && lower === Sequences.TitleEnd[2]) {
this.startSpecial(Sequences.TitleEnd, 3);
}
else {
this.state =
!this.xmlMode && lower === Sequences.ScriptEnd[2]
? State.BeforeSpecialS
: State.InTagName;
}
}
else if (c === CharCodes.Slash) {
this.state = State.BeforeClosingTagName;
}
else {
this.state = State.Text;
this.stateText(c);
}
}
stateInTagName(c) {
if (isEndOfTagSection(c)) {
this.cbs.onopentagname(this.sectionStart, this.index);
this.sectionStart = -1;
this.state = State.BeforeAttributeName;
this.stateBeforeAttributeName(c);
}
}
stateBeforeClosingTagName(c) {
if (isWhitespace(c)) {
// Ignore
}
else if (c === CharCodes.Gt) {
this.state = State.Text;
}
else {
this.state = this.isTagStartChar(c)
? State.InClosingTagName
: State.InSpecialComment;
this.sectionStart = this.index;
}
}
stateInClosingTagName(c) {
if (c === CharCodes.Gt || isWhitespace(c)) {
this.cbs.onclosetag(this.sectionStart, this.index);
this.sectionStart = -1;
this.state = State.AfterClosingTagName;
this.stateAfterClosingTagName(c);
}
}
stateAfterClosingTagName(c) {
// Skip everything until ">"
if (c === CharCodes.Gt || this.fastForwardTo(CharCodes.Gt)) {
this.state = State.Text;
this.sectionStart = this.index + 1;
}
}
stateBeforeAttributeName(c) {
if (c === CharCodes.Gt) {
this.cbs.onopentagend(this.index);
if (this.isSpecial) {
this.state = State.InSpecialTag;
this.sequenceIndex = 0;
}
else {
this.state = State.Text;
}
this.baseState = this.state;
this.sectionStart = this.index + 1;
}
else if (c === CharCodes.Slash) {
this.state = State.InSelfClosingTag;
}
else if (!isWhitespace(c)) {
this.state = State.InAttributeName;
this.sectionStart = this.index;
}
}
stateInSelfClosingTag(c) {
if (c === CharCodes.Gt) {
this.cbs.onselfclosingtag(this.index);
this.state = State.Text;
this.baseState = State.Text;
this.sectionStart = this.index + 1;
this.isSpecial = false; // Reset special state, in case of self-closing special tags
}
else if (!isWhitespace(c)) {
this.state = State.BeforeAttributeName;
this.stateBeforeAttributeName(c);
}
}
stateInAttributeName(c) {
if (c === CharCodes.Eq || isEndOfTagSection(c)) {
this.cbs.onattribname(this.sectionStart, this.index);
this.sectionStart = -1;
this.state = State.AfterAttributeName;
this.stateAfterAttributeName(c);
}
}
stateAfterAttributeName(c) {
if (c === CharCodes.Eq) {
this.state = State.BeforeAttributeValue;
}
else if (c === CharCodes.Slash || c === CharCodes.Gt) {
this.cbs.onattribend(QuoteType.NoValue, this.index);
this.state = State.BeforeAttributeName;
this.stateBeforeAttributeName(c);
}
else if (!isWhitespace(c)) {
this.cbs.onattribend(QuoteType.NoValue, this.index);
this.state = State.InAttributeName;
this.sectionStart = this.index;
}
}
stateBeforeAttributeValue(c) {
if (c === CharCodes.DoubleQuote) {
this.state = State.InAttributeValueDq;
this.sectionStart = this.index + 1;
}
else if (c === CharCodes.SingleQuote) {
this.state = State.InAttributeValueSq;
this.sectionStart = this.index + 1;
}
else if (!isWhitespace(c)) {
this.sectionStart = this.index;
this.state = State.InAttributeValueNq;
this.stateInAttributeValueNoQuotes(c); // Reconsume token
}
}
handleInAttributeValue(c, quote) {
if (c === quote ||
(!this.decodeEntities && 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);
this.state = State.BeforeAttributeName;
}
else if (this.decodeEntities && c === CharCodes.Amp) {
this.baseState = this.state;
this.state = State.BeforeEntity;
}
}
stateInAttributeValueDoubleQuotes(c) {
this.handleInAttributeValue(c, CharCodes.DoubleQuote);
}
stateInAttributeValueSingleQuotes(c) {
this.handleInAttributeValue(c, CharCodes.SingleQuote);
}
stateInAttributeValueNoQuotes(c) {
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.BeforeAttributeName;
this.stateBeforeAttributeName(c);
}
else if (this.decodeEntities && c === CharCodes.Amp) {
this.baseState = this.state;
this.state = State.BeforeEntity;
}
}
stateBeforeDeclaration(c) {
if (c === CharCodes.OpeningSquareBracket) {
this.state = State.CDATASequence;
this.sequenceIndex = 0;
}
else {
this.state =
c === CharCodes.Dash
? State.BeforeComment
: State.InDeclaration;
}
}
stateInDeclaration(c) {
if (c === CharCodes.Gt || this.fastForwardTo(CharCodes.Gt)) {
this.cbs.ondeclaration(this.sectionStart, this.index);
this.state = State.Text;
this.sectionStart = this.index + 1;
}
}
stateInProcessingInstruction(c) {
if (c === CharCodes.Gt || this.fastForwardTo(CharCodes.Gt)) {
this.cbs.onprocessinginstruction(this.sectionStart, this.index);
this.state = State.Text;
this.sectionStart = this.index + 1;
}
}
stateBeforeComment(c) {
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;
}
}
stateInSpecialComment(c) {
if (c === CharCodes.Gt || this.fastForwardTo(CharCodes.Gt)) {
this.cbs.oncomment(this.sectionStart, this.index, 0);
this.state = State.Text;
this.sectionStart = this.index + 1;
}
}
stateBeforeSpecialS(c) {
const lower = c | 0x20;
if (lower === Sequences.ScriptEnd[3]) {
this.startSpecial(Sequences.ScriptEnd, 4);
}
else if (lower === Sequences.StyleEnd[3]) {
this.startSpecial(Sequences.StyleEnd, 4);
}
else {
this.state = State.InTagName;
this.stateInTagName(c); // Consume the token again
}
}
stateBeforeEntity(c) {
// Start excess with 1 to include the '&'
this.entityExcess = 1;
this.entityResult = 0;
if (c === CharCodes.Num) {
this.state = State.BeforeNumericEntity;
}
else if (c === CharCodes.Amp) {
// We have two `&` characters in a row. Stay in the current state.
}
else {
this.trieIndex = 0;
this.trieCurrent = this.entityTrie[0];
this.state = State.InNamedEntity;
this.stateInNamedEntity(c);
}
}
stateInNamedEntity(c) {
this.entityExcess += 1;
this.trieIndex = determineBranch(this.entityTrie, this.trieCurrent, this.trieIndex + 1, c);
if (this.trieIndex < 0) {
this.emitNamedEntity();
this.index--;
return;
}
this.trieCurrent = this.entityTrie[this.trieIndex];
const masked = this.trieCurrent & BinTrieFlags.VALUE_LENGTH;
// If the branch is a value, store it and continue
if (masked) {
// The mask is the number of bytes of the value, including the current byte.
const valueLength = (masked >> 14) - 1;
// If we have a legacy entity while parsing strictly, just skip the number of bytes
if (!this.allowLegacyEntity() && c !== CharCodes.Semi) {
this.trieIndex += valueLength;
}
else {
// Add 1 as we have already incremented the excess
const entityStart = this.index - this.entityExcess + 1;
if (entityStart > this.sectionStart) {
this.emitPartial(this.sectionStart, entityStart);
}
// If this is a surrogate pair, consume the next two bytes
this.entityResult = this.trieIndex;
this.trieIndex += valueLength;
this.entityExcess = 0;
this.sectionStart = this.index + 1;
if (valueLength === 0) {
this.emitNamedEntity();
}
}
}
}
emitNamedEntity() {
this.state = this.baseState;
if (this.entityResult === 0) {
return;
}
const valueLength = (this.entityTrie[this.entityResult] & BinTrieFlags.VALUE_LENGTH) >>
14;
switch (valueLength) {
case 1:
this.emitCodePoint(this.entityTrie[this.entityResult] &
~BinTrieFlags.VALUE_LENGTH);
break;
case 2:
this.emitCodePoint(this.entityTrie[this.entityResult + 1]);
break;
case 3: {
this.emitCodePoint(this.entityTrie[this.entityResult + 1]);
this.emitCodePoint(this.entityTrie[this.entityResult + 2]);
}
}
}
stateBeforeNumericEntity(c) {
if ((c | 0x20) === CharCodes.LowerX) {
this.entityExcess++;
this.state = State.InHexEntity;
}
else {
this.state = State.InNumericEntity;
this.stateInNumericEntity(c);
}
}
emitNumericEntity(strict) {
const entityStart = this.index - this.entityExcess - 1;
const numberStart = entityStart + 2 + Number(this.state === State.InHexEntity);
if (numberStart !== this.index) {
// Emit leading data if any
if (entityStart > this.sectionStart) {
this.emitPartial(this.sectionStart, entityStart);
}
this.sectionStart = this.index + Number(strict);
this.emitCodePoint(replaceCodePoint(this.entityResult));
}
this.state = this.baseState;
}
stateInNumericEntity(c) {
if (c === CharCodes.Semi) {
this.emitNumericEntity(true);
}
else if (isNumber(c)) {
this.entityResult = this.entityResult * 10 + (c - CharCodes.Zero);
this.entityExcess++;
}
else {
if (this.allowLegacyEntity()) {
this.emitNumericEntity(false);
}
else {
this.state = this.baseState;
}
this.index--;
}
}
stateInHexEntity(c) {
if (c === CharCodes.Semi) {
this.emitNumericEntity(true);
}
else if (isNumber(c)) {
this.entityResult = this.entityResult * 16 + (c - CharCodes.Zero);
this.entityExcess++;
}
else if (isHexDigit(c)) {
this.entityResult =
this.entityResult * 16 + ((c | 0x20) - CharCodes.LowerA + 10);
this.entityExcess++;
}
else {
if (this.allowLegacyEntity()) {
this.emitNumericEntity(false);
}
else {
this.state = this.baseState;
}
this.index--;
}
}
allowLegacyEntity() {
return (!this.xmlMode &&
(this.baseState === State.Text ||
this.baseState === State.InSpecialTag));
}
/**
* Remove data that has already been consumed from the buffer.
*/
cleanup() {
// If we are inside of text or attributes, emit what we already have.
if (this.running && this.sectionStart !== this.index) {
if (this.state === State.Text ||
(this.state === State.InSpecialTag && this.sequenceIndex === 0)) {
this.cbs.ontext(this.sectionStart, this.index);
this.sectionStart = this.index;
}
else if (this.state === State.InAttributeValueDq ||
this.state === State.InAttributeValueSq ||
this.state === State.InAttributeValueNq) {
this.cbs.onattribdata(this.sectionStart, this.index);
this.sectionStart = this.index;
}
}
}
shouldContinue() {
return this.index < this.buffer.length + this.offset && this.running;
}
/**
* 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.
*/
parse() {
while (this.shouldContinue()) {
const c = this.buffer.charCodeAt(this.index - this.offset);
if (this.state === State.Text) {
this.stateText(c);
}
else if (this.state === State.SpecialStartSequence) {
this.stateSpecialStartSequence(c);
}
else if (this.state === State.InSpecialTag) {
this.stateInSpecialTag(c);
}
else if (this.state === State.CDATASequence) {
this.stateCDATASequence(c);
}
else if (this.state === State.InAttributeValueDq) {
this.stateInAttributeValueDoubleQuotes(c);
}
else if (this.state === State.InAttributeName) {
this.stateInAttributeName(c);
}
else if (this.state === State.InCommentLike) {
this.stateInCommentLike(c);
}
else if (this.state === State.InSpecialComment) {
this.stateInSpecialComment(c);
}
else if (this.state === State.BeforeAttributeName) {
this.stateBeforeAttributeName(c);
}
else if (this.state === State.InTagName) {
this.stateInTagName(c);
}
else if (this.state === State.InClosingTagName) {
this.stateInClosingTagName(c);
}
else if (this.state === State.BeforeTagName) {
this.stateBeforeTagName(c);
}
else if (this.state === State.AfterAttributeName) {
this.stateAfterAttributeName(c);
}
else if (this.state === State.InAttributeValueSq) {
this.stateInAttributeValueSingleQuotes(c);
}
else if (this.state === State.BeforeAttributeValue) {
this.stateBeforeAttributeValue(c);
}
else if (this.state === State.BeforeClosingTagName) {
this.stateBeforeClosingTagName(c);
}
else if (this.state === State.AfterClosingTagName) {
this.stateAfterClosingTagName(c);
}
else if (this.state === State.BeforeSpecialS) {
this.stateBeforeSpecialS(c);
}
else if (this.state === State.InAttributeValueNq) {
this.stateInAttributeValueNoQuotes(c);
}
else if (this.state === State.InSelfClosingTag) {
this.stateInSelfClosingTag(c);
}
else if (this.state === State.InDeclaration) {
this.stateInDeclaration(c);
}
else if (this.state === State.BeforeDeclaration) {
this.stateBeforeDeclaration(c);
}
else if (this.state === State.BeforeComment) {
this.stateBeforeComment(c);
}
else if (this.state === State.InProcessingInstruction) {
this.stateInProcessingInstruction(c);
}
else if (this.state === State.InNamedEntity) {
this.stateInNamedEntity(c);
}
else if (this.state === State.BeforeEntity) {
this.stateBeforeEntity(c);
}
else if (this.state === State.InHexEntity) {
this.stateInHexEntity(c);
}
else if (this.state === State.InNumericEntity) {
this.stateInNumericEntity(c);
}
else {
// `this._state === State.BeforeNumericEntity`
this.stateBeforeNumericEntity(c);
}
this.index++;
}
this.cleanup();
}
finish() {
if (this.state === State.InNamedEntity) {
this.emitNamedEntity();
}
// If there is remaining data, emit it in a reasonable way
if (this.sectionStart < this.index) {
this.handleTrailingData();
}
this.cbs.onend();
}
/** Handle any trailing data. */
handleTrailingData() {
const endIndex = this.buffer.length + this.offset;
if (this.state === State.InCommentLike) {
if (this.currentSequence === Sequences.CdataEnd) {
this.cbs.oncdata(this.sectionStart, endIndex, 0);
}
else {
this.cbs.oncomment(this.sectionStart, endIndex, 0);
}
}
else if (this.state === State.InNumericEntity &&
this.allowLegacyEntity()) {
this.emitNumericEntity(false);
// All trailing data will have been consumed
}
else if (this.state === State.InHexEntity &&
this.allowLegacyEntity()) {
this.emitNumericEntity(false);
// All trailing data will have been consumed
}
else if (this.state === State.InTagName ||
this.state === State.BeforeAttributeName ||
this.state === State.BeforeAttributeValue ||
this.state === State.AfterAttributeName ||
this.state === State.InAttributeName ||
this.state === State.InAttributeValueSq ||
this.state === State.InAttributeValueDq ||
this.state === State.InAttributeValueNq ||
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);
}
}
emitPartial(start, endIndex) {
if (this.baseState !== State.Text &&
this.baseState !== State.InSpecialTag) {
this.cbs.onattribdata(start, endIndex);
}
else {
this.cbs.ontext(start, endIndex);
}
}
emitCodePoint(cp) {
if (this.baseState !== State.Text &&
this.baseState !== State.InSpecialTag) {
this.cbs.onattribentity(cp);
}
else {
this.cbs.ontextentity(cp);
}
}
}
//# sourceMappingURL=Tokenizer.js.map