File: //home/arjun/projects/good-life-be/node_modules/encoding-sniffer/dist/esm/sniffer.js
import { labelToName } from "whatwg-encoding";
// https://html.spec.whatwg.org/multipage/syntax.html#prescan-a-byte-stream-to-determine-its-encoding
var State;
(function (State) {
// Before anything starts; can be any of BOM, UTF-16 XML declarations or meta tags
State[State["Begin"] = 0] = "Begin";
// Inside of a BOM
State[State["BOM16BE"] = 1] = "BOM16BE";
State[State["BOM16LE"] = 2] = "BOM16LE";
State[State["BOM8"] = 3] = "BOM8";
// XML prefix
State[State["UTF16LE_XML_PREFIX"] = 4] = "UTF16LE_XML_PREFIX";
State[State["BeginLT"] = 5] = "BeginLT";
State[State["UTF16BE_XML_PREFIX"] = 6] = "UTF16BE_XML_PREFIX";
// Waiting for opening `<`
State[State["BeforeTag"] = 7] = "BeforeTag";
// After the opening `<`
State[State["BeforeTagName"] = 8] = "BeforeTagName";
// After `</`
State[State["BeforeCloseTagName"] = 9] = "BeforeCloseTagName";
// Beginning of a comment
State[State["CommentStart"] = 10] = "CommentStart";
// End of a comment
State[State["CommentEnd"] = 11] = "CommentEnd";
// A tag name that could be `meta`
State[State["TagNameMeta"] = 12] = "TagNameMeta";
// A tag name that is not `meta`
State[State["TagNameOther"] = 13] = "TagNameOther";
// XML declaration
State[State["XMLDeclaration"] = 14] = "XMLDeclaration";
State[State["XMLDeclarationBeforeEncoding"] = 15] = "XMLDeclarationBeforeEncoding";
State[State["XMLDeclarationAfterEncoding"] = 16] = "XMLDeclarationAfterEncoding";
State[State["XMLDeclarationBeforeValue"] = 17] = "XMLDeclarationBeforeValue";
State[State["XMLDeclarationValue"] = 18] = "XMLDeclarationValue";
// Anything that looks like a tag, but doesn't fit in the above categories
State[State["WeirdTag"] = 19] = "WeirdTag";
State[State["BeforeAttribute"] = 20] = "BeforeAttribute";
/*
* Attributes in meta tag — we compare them to our set here, and back out
* We care about four attributes: http-equiv, content-type, content, charset
*/
State[State["MetaAttribHttpEquiv"] = 21] = "MetaAttribHttpEquiv";
// The value has to be `content-type`
State[State["MetaAttribHttpEquivValue"] = 22] = "MetaAttribHttpEquivValue";
State[State["MetaAttribC"] = 23] = "MetaAttribC";
State[State["MetaAttribContent"] = 24] = "MetaAttribContent";
State[State["MetaAttribCharset"] = 25] = "MetaAttribCharset";
// Waiting for whitespace
State[State["MetaAttribAfterName"] = 26] = "MetaAttribAfterName";
State[State["MetaContentValueQuotedBeforeEncoding"] = 27] = "MetaContentValueQuotedBeforeEncoding";
State[State["MetaContentValueQuotedAfterEncoding"] = 28] = "MetaContentValueQuotedAfterEncoding";
State[State["MetaContentValueQuotedBeforeValue"] = 29] = "MetaContentValueQuotedBeforeValue";
State[State["MetaContentValueQuotedValueQuoted"] = 30] = "MetaContentValueQuotedValueQuoted";
State[State["MetaContentValueQuotedValueUnquoted"] = 31] = "MetaContentValueQuotedValueUnquoted";
State[State["MetaContentValueUnquotedBeforeEncoding"] = 32] = "MetaContentValueUnquotedBeforeEncoding";
State[State["MetaContentValueUnquotedBeforeValue"] = 33] = "MetaContentValueUnquotedBeforeValue";
State[State["MetaContentValueUnquotedValueQuoted"] = 34] = "MetaContentValueUnquotedValueQuoted";
State[State["MetaContentValueUnquotedValueUnquoted"] = 35] = "MetaContentValueUnquotedValueUnquoted";
State[State["AnyAttribName"] = 36] = "AnyAttribName";
// After the name of an attribute, before the equals sign
State[State["AfterAttributeName"] = 37] = "AfterAttributeName";
// After `=`
State[State["BeforeAttributeValue"] = 38] = "BeforeAttributeValue";
State[State["AttributeValueQuoted"] = 39] = "AttributeValueQuoted";
State[State["AttributeValueUnquoted"] = 40] = "AttributeValueUnquoted";
})(State || (State = {}));
export var ResultType;
(function (ResultType) {
// Byte order mark
ResultType[ResultType["BOM"] = 0] = "BOM";
// User- or transport layer-defined
ResultType[ResultType["PASSED"] = 1] = "PASSED";
// XML prefixes
ResultType[ResultType["XML_PREFIX"] = 2] = "XML_PREFIX";
// Meta tag
ResultType[ResultType["META_TAG"] = 3] = "META_TAG";
// XML encoding
ResultType[ResultType["XML_ENCODING"] = 4] = "XML_ENCODING";
// Default
ResultType[ResultType["DEFAULT"] = 5] = "DEFAULT";
})(ResultType || (ResultType = {}));
var AttribType;
(function (AttribType) {
AttribType[AttribType["None"] = 0] = "None";
AttribType[AttribType["HttpEquiv"] = 1] = "HttpEquiv";
AttribType[AttribType["Content"] = 2] = "Content";
AttribType[AttribType["Charset"] = 3] = "Charset";
})(AttribType || (AttribType = {}));
var Chars;
(function (Chars) {
Chars[Chars["NIL"] = 0] = "NIL";
Chars[Chars["TAB"] = 9] = "TAB";
Chars[Chars["LF"] = 10] = "LF";
Chars[Chars["CR"] = 13] = "CR";
Chars[Chars["SPACE"] = 32] = "SPACE";
Chars[Chars["EXCLAMATION"] = 33] = "EXCLAMATION";
Chars[Chars["DQUOTE"] = 34] = "DQUOTE";
Chars[Chars["SQUOTE"] = 39] = "SQUOTE";
Chars[Chars["DASH"] = 45] = "DASH";
Chars[Chars["SLASH"] = 47] = "SLASH";
Chars[Chars["SEMICOLON"] = 59] = "SEMICOLON";
Chars[Chars["LT"] = 60] = "LT";
Chars[Chars["EQUALS"] = 61] = "EQUALS";
Chars[Chars["GT"] = 62] = "GT";
Chars[Chars["QUESTION"] = 63] = "QUESTION";
Chars[Chars["UpperA"] = 65] = "UpperA";
Chars[Chars["UpperZ"] = 90] = "UpperZ";
Chars[Chars["LowerA"] = 97] = "LowerA";
Chars[Chars["LowerZ"] = 122] = "LowerZ";
})(Chars || (Chars = {}));
var SPACE_CHARACTERS = new Set([Chars.SPACE, Chars.LF, Chars.CR, Chars.TAB]);
var END_OF_UNQUOTED_ATTRIBUTE_VALUE = new Set([
Chars.SPACE,
Chars.LF,
Chars.CR,
Chars.TAB,
Chars.GT,
]);
function toUint8Array(str) {
var arr = new Uint8Array(str.length);
for (var i = 0; i < str.length; i++) {
arr[i] = str.charCodeAt(i);
}
return arr;
}
export var STRINGS = {
UTF8_BOM: new Uint8Array([0xef, 0xbb, 0xbf]),
UTF16LE_BOM: new Uint8Array([0xff, 0xfe]),
UTF16BE_BOM: new Uint8Array([0xfe, 0xff]),
UTF16LE_XML_PREFIX: new Uint8Array([0x3c, 0x0, 0x3f, 0x0, 0x78, 0x0]),
UTF16BE_XML_PREFIX: new Uint8Array([0x0, 0x3c, 0x0, 0x3f, 0x0, 0x78]),
XML_DECLARATION: toUint8Array("<?xml"),
ENCODING: toUint8Array("encoding"),
META: toUint8Array("meta"),
HTTP_EQUIV: toUint8Array("http-equiv"),
CONTENT: toUint8Array("content"),
CONTENT_TYPE: toUint8Array("content-type"),
CHARSET: toUint8Array("charset"),
COMMENT_START: toUint8Array("<!--"),
COMMENT_END: toUint8Array("-->"),
};
function isAsciiAlpha(c) {
return ((c >= Chars.UpperA && c <= Chars.UpperZ) ||
(c >= Chars.LowerA && c <= Chars.LowerZ));
}
function isQuote(c) {
return c === Chars.DQUOTE || c === Chars.SQUOTE;
}
var Sniffer = /** @class */ (function () {
function Sniffer(_a) {
var _b = _a === void 0 ? {} : _a, _c = _b.maxBytes, maxBytes = _c === void 0 ? 1024 : _c, userEncoding = _b.userEncoding, transportLayerEncodingLabel = _b.transportLayerEncodingLabel, defaultEncoding = _b.defaultEncoding;
/** The offset of the previous buffers. */
this.offset = 0;
this.state = State.Begin;
this.sectionIndex = 0;
this.attribType = AttribType.None;
/**
* Indicates if the `http-equiv` is `content-type`.
*
* Initially `null`, a boolean when a value is found.
*/
this.gotPragma = null;
this.needsPragma = null;
this.inMetaTag = false;
this.encoding = "windows-1252";
this.resultType = ResultType.DEFAULT;
this.quoteCharacter = 0;
this.attributeValue = [];
this.maxBytes = maxBytes;
if (userEncoding) {
this.setResult(userEncoding, ResultType.PASSED);
}
if (transportLayerEncodingLabel) {
this.setResult(transportLayerEncodingLabel, ResultType.PASSED);
}
if (defaultEncoding) {
this.setResult(defaultEncoding, ResultType.DEFAULT);
}
}
Sniffer.prototype.setResult = function (label, type) {
if (this.resultType === ResultType.DEFAULT || this.resultType > type) {
var encoding = labelToName(label);
if (encoding) {
this.encoding =
// Check if we are in a meta tag and the encoding is `x-user-defined`
type === ResultType.META_TAG &&
encoding === "x-user-defined"
? "windows-1252"
: // Check if we are in a meta tag or xml declaration, and the encoding is UTF-16
(type === ResultType.META_TAG ||
type === ResultType.XML_ENCODING) &&
(encoding === "UTF-16LE" || encoding === "UTF-16BE")
? "UTF-8"
: encoding;
this.resultType = type;
}
}
};
Sniffer.prototype.stateBegin = function (c) {
switch (c) {
case STRINGS.UTF16BE_BOM[0]: {
this.state = State.BOM16BE;
break;
}
case STRINGS.UTF16LE_BOM[0]: {
this.state = State.BOM16LE;
break;
}
case STRINGS.UTF8_BOM[0]: {
this.sectionIndex = 1;
this.state = State.BOM8;
break;
}
case Chars.NIL: {
this.state = State.UTF16BE_XML_PREFIX;
this.sectionIndex = 1;
break;
}
case Chars.LT: {
this.state = State.BeginLT;
break;
}
default: {
this.state = State.BeforeTag;
}
}
};
Sniffer.prototype.stateBeginLT = function (c) {
if (c === Chars.NIL) {
this.state = State.UTF16LE_XML_PREFIX;
this.sectionIndex = 2;
}
else if (c === Chars.QUESTION) {
this.state = State.XMLDeclaration;
this.sectionIndex = 2;
}
else {
this.state = State.BeforeTagName;
this.stateBeforeTagName(c);
}
};
Sniffer.prototype.stateUTF16BE_XML_PREFIX = function (c) {
// Advance position in the section
if (this.advanceSection(STRINGS.UTF16BE_XML_PREFIX, c)) {
if (this.sectionIndex === STRINGS.UTF16BE_XML_PREFIX.length) {
// We have the whole prefix
this.setResult("utf-16be", ResultType.XML_PREFIX);
}
}
else {
this.state = State.BeforeTag;
this.stateBeforeTag(c);
}
};
Sniffer.prototype.stateUTF16LE_XML_PREFIX = function (c) {
// Advance position in the section
if (this.advanceSection(STRINGS.UTF16LE_XML_PREFIX, c)) {
if (this.sectionIndex === STRINGS.UTF16LE_XML_PREFIX.length) {
// We have the whole prefix
this.setResult("utf-16le", ResultType.XML_PREFIX);
}
}
else {
this.state = State.BeforeTag;
this.stateBeforeTag(c);
}
};
Sniffer.prototype.stateBOM16LE = function (c) {
if (c === STRINGS.UTF16LE_BOM[1]) {
this.setResult("utf-16le", ResultType.BOM);
}
else {
this.state = State.BeforeTag;
this.stateBeforeTag(c);
}
};
Sniffer.prototype.stateBOM16BE = function (c) {
if (c === STRINGS.UTF16BE_BOM[1]) {
this.setResult("utf-16be", ResultType.BOM);
}
else {
this.state = State.BeforeTag;
this.stateBeforeTag(c);
}
};
Sniffer.prototype.stateBOM8 = function (c) {
if (this.advanceSection(STRINGS.UTF8_BOM, c) &&
this.sectionIndex === STRINGS.UTF8_BOM.length) {
this.setResult("utf-8", ResultType.BOM);
}
};
Sniffer.prototype.stateBeforeTag = function (c) {
if (c === Chars.LT) {
this.state = State.BeforeTagName;
this.inMetaTag = false;
}
};
/**
* We have seen a `<`, and now have to figure out what to do.
*
* Options:
* - `<meta`
* - Any other tag
* - A closing tag
* - `<!--`
* - An XML declaration
*
*/
Sniffer.prototype.stateBeforeTagName = function (c) {
if (isAsciiAlpha(c)) {
if ((c | 0x20) === STRINGS.META[0]) {
this.sectionIndex = 1;
this.state = State.TagNameMeta;
}
else {
this.state = State.TagNameOther;
}
}
else
switch (c) {
case Chars.SLASH: {
this.state = State.BeforeCloseTagName;
break;
}
case Chars.EXCLAMATION: {
this.state = State.CommentStart;
this.sectionIndex = 2;
break;
}
case Chars.QUESTION: {
this.state = State.WeirdTag;
break;
}
default: {
this.state = State.BeforeTag;
this.stateBeforeTag(c);
}
}
};
Sniffer.prototype.stateBeforeCloseTagName = function (c) {
this.state = isAsciiAlpha(c)
? // Switch to `TagNameOther`; the HTML spec allows attributes here as well.
State.TagNameOther
: State.WeirdTag;
};
Sniffer.prototype.stateCommentStart = function (c) {
if (this.advanceSection(STRINGS.COMMENT_START, c)) {
if (this.sectionIndex === STRINGS.COMMENT_START.length) {
this.state = State.CommentEnd;
// The -- of the comment start can be part of the end.
this.sectionIndex = 2;
}
}
else {
this.state = State.WeirdTag;
this.stateWeirdTag(c);
}
};
Sniffer.prototype.stateCommentEnd = function (c) {
if (this.advanceSection(STRINGS.COMMENT_END, c)) {
if (this.sectionIndex === STRINGS.COMMENT_END.length) {
this.state = State.BeforeTag;
}
}
else if (c === Chars.DASH) {
/*
* If we are here, we know we expected a `>` above.
* Set this to 2, to support many dashes before the closing `>`.
*/
this.sectionIndex = 2;
}
};
/**
* Any section starting with `<!`, `<?`, `</`, without being a closing tag or comment.
*/
Sniffer.prototype.stateWeirdTag = function (c) {
if (c === Chars.GT) {
this.state = State.BeforeTag;
}
};
/**
* Advances the section, ignoring upper/lower case.
*
* Make sure the section has left-over characters before calling.
*
* @returns `false` if we did not match the section.
*/
Sniffer.prototype.advanceSectionIC = function (section, c) {
return this.advanceSection(section, c | 0x20);
};
/**
* Advances the section.
*
* Make sure the section has left-over characters before calling.
*
* @returns `false` if we did not match the section.
*/
Sniffer.prototype.advanceSection = function (section, c) {
if (section[this.sectionIndex] === c) {
this.sectionIndex++;
return true;
}
this.sectionIndex = 0;
return false;
};
Sniffer.prototype.stateTagNameMeta = function (c) {
if (this.sectionIndex < STRINGS.META.length) {
if (this.advanceSectionIC(STRINGS.META, c)) {
return;
}
}
else if (SPACE_CHARACTERS.has(c)) {
this.inMetaTag = true;
this.gotPragma = null;
this.needsPragma = null;
this.state = State.BeforeAttribute;
return;
}
this.state = State.TagNameOther;
// Reconsume in case there is a `>`.
this.stateTagNameOther(c);
};
Sniffer.prototype.stateTagNameOther = function (c) {
if (SPACE_CHARACTERS.has(c)) {
this.state = State.BeforeAttribute;
}
else if (c === Chars.GT) {
this.state = State.BeforeTag;
}
};
Sniffer.prototype.stateBeforeAttribute = function (c) {
if (SPACE_CHARACTERS.has(c))
return;
if (this.inMetaTag) {
var lower = c | 0x20;
if (lower === STRINGS.HTTP_EQUIV[0]) {
this.sectionIndex = 1;
this.state = State.MetaAttribHttpEquiv;
return;
}
else if (lower === STRINGS.CHARSET[0]) {
this.sectionIndex = 1;
this.state = State.MetaAttribC;
return;
}
}
this.state =
c === Chars.SLASH || c === Chars.GT
? State.BeforeTag
: State.AnyAttribName;
};
Sniffer.prototype.handleMetaAttrib = function (c, section, type) {
if (this.advanceSectionIC(section, c)) {
if (this.sectionIndex === section.length) {
this.attribType = type;
this.state = State.MetaAttribAfterName;
}
}
else {
this.state = State.AnyAttribName;
this.stateAnyAttribName(c);
}
};
Sniffer.prototype.stateMetaAttribHttpEquiv = function (c) {
this.handleMetaAttrib(c, STRINGS.HTTP_EQUIV, AttribType.HttpEquiv);
};
Sniffer.prototype.stateMetaAttribC = function (c) {
var lower = c | 0x20;
if (lower === STRINGS.CHARSET[1]) {
this.sectionIndex = 2;
this.state = State.MetaAttribCharset;
}
else if (lower === STRINGS.CONTENT[1]) {
this.sectionIndex = 2;
this.state = State.MetaAttribContent;
}
else {
this.state = State.AnyAttribName;
this.stateAnyAttribName(c);
}
};
Sniffer.prototype.stateMetaAttribCharset = function (c) {
this.handleMetaAttrib(c, STRINGS.CHARSET, AttribType.Charset);
};
Sniffer.prototype.stateMetaAttribContent = function (c) {
this.handleMetaAttrib(c, STRINGS.CONTENT, AttribType.Content);
};
Sniffer.prototype.stateMetaAttribAfterName = function (c) {
if (SPACE_CHARACTERS.has(c) || c === Chars.EQUALS) {
this.state = State.AfterAttributeName;
this.stateAfterAttributeName(c);
}
else {
this.state = State.AnyAttribName;
this.stateAnyAttribName(c);
}
};
Sniffer.prototype.stateAnyAttribName = function (c) {
if (SPACE_CHARACTERS.has(c)) {
this.attribType = AttribType.None;
this.state = State.AfterAttributeName;
}
else if (c === Chars.SLASH || c === Chars.GT) {
this.state = State.BeforeTag;
}
else if (c === Chars.EQUALS) {
this.state = State.BeforeAttributeValue;
}
};
Sniffer.prototype.stateAfterAttributeName = function (c) {
if (SPACE_CHARACTERS.has(c))
return;
if (c === Chars.EQUALS) {
this.state = State.BeforeAttributeValue;
}
else {
this.state = State.BeforeAttribute;
this.stateBeforeAttribute(c);
}
};
Sniffer.prototype.stateBeforeAttributeValue = function (c) {
if (SPACE_CHARACTERS.has(c))
return;
this.attributeValue.length = 0;
this.sectionIndex = 0;
if (isQuote(c)) {
this.quoteCharacter = c;
this.state =
this.attribType === AttribType.Content
? State.MetaContentValueQuotedBeforeEncoding
: this.attribType === AttribType.HttpEquiv
? State.MetaAttribHttpEquivValue
: State.AttributeValueQuoted;
}
else if (this.attribType === AttribType.Content) {
this.state = State.MetaContentValueUnquotedBeforeEncoding;
this.stateMetaContentValueUnquotedBeforeEncoding(c);
}
else if (this.attribType === AttribType.HttpEquiv) {
// We use `quoteCharacter = 0` to signify that the value is unquoted.
this.quoteCharacter = 0;
this.sectionIndex = 0;
this.state = State.MetaAttribHttpEquivValue;
this.stateMetaAttribHttpEquivValue(c);
}
else {
this.state = State.AttributeValueUnquoted;
this.stateAttributeValueUnquoted(c);
}
};
// The value has to be `content-type`
Sniffer.prototype.stateMetaAttribHttpEquivValue = function (c) {
if (this.sectionIndex === STRINGS.CONTENT_TYPE.length) {
if (this.quoteCharacter === 0
? END_OF_UNQUOTED_ATTRIBUTE_VALUE.has(c)
: c === this.quoteCharacter) {
if (this.needsPragma !== null) {
this.setResult(this.needsPragma, ResultType.META_TAG);
}
else if (this.gotPragma === null) {
this.gotPragma = true;
}
this.state = State.BeforeAttribute;
return;
}
}
else if (this.advanceSectionIC(STRINGS.CONTENT_TYPE, c)) {
return;
}
this.gotPragma = false;
if (this.quoteCharacter === 0) {
this.state = State.AttributeValueUnquoted;
this.stateAttributeValueUnquoted(c);
}
else {
this.state = State.AttributeValueQuoted;
this.stateAttributeValueQuoted(c);
}
};
Sniffer.prototype.handleMetaContentValue = function () {
if (this.attributeValue.length === 0)
return;
var encoding = String.fromCharCode.apply(String, this.attributeValue);
if (this.gotPragma) {
this.setResult(encoding, ResultType.META_TAG);
}
else if (this.needsPragma === null) {
// Don't override a previous result.
this.needsPragma = encoding;
}
this.attributeValue.length = 0;
};
Sniffer.prototype.handleAttributeValue = function () {
if (this.attribType === AttribType.Charset) {
this.setResult(String.fromCharCode.apply(String, this.attributeValue), ResultType.META_TAG);
}
};
Sniffer.prototype.stateAttributeValueUnquoted = function (c) {
if (SPACE_CHARACTERS.has(c)) {
this.handleAttributeValue();
this.state = State.BeforeAttribute;
}
else if (c === Chars.SLASH || c === Chars.GT) {
this.handleAttributeValue();
this.state = State.BeforeTag;
}
else if (this.attribType === AttribType.Charset) {
this.attributeValue.push(c | 0x20);
}
};
Sniffer.prototype.findMetaContentEncoding = function (c) {
if (this.advanceSectionIC(STRINGS.CHARSET, c)) {
if (this.sectionIndex === STRINGS.CHARSET.length) {
return true;
}
}
else {
// If we encountered another `c`, assume we started over.
this.sectionIndex = Number(c === STRINGS.CHARSET[0]);
}
return false;
};
Sniffer.prototype.stateMetaContentValueUnquotedBeforeEncoding = function (c) {
if (END_OF_UNQUOTED_ATTRIBUTE_VALUE.has(c)) {
this.stateAttributeValueUnquoted(c);
}
else if (this.sectionIndex === STRINGS.CHARSET.length) {
if (c === Chars.EQUALS) {
this.state = State.MetaContentValueUnquotedBeforeValue;
}
}
else {
this.findMetaContentEncoding(c);
}
};
Sniffer.prototype.stateMetaContentValueUnquotedBeforeValue = function (c) {
if (isQuote(c)) {
this.quoteCharacter = c;
this.state = State.MetaContentValueUnquotedValueQuoted;
}
else if (END_OF_UNQUOTED_ATTRIBUTE_VALUE.has(c)) {
// Can't have spaces here, as it would no longer be part of the attribute value.
this.stateAttributeValueUnquoted(c);
}
else {
this.state = State.MetaContentValueUnquotedValueUnquoted;
this.stateMetaContentValueUnquotedValueUnquoted(c);
}
};
Sniffer.prototype.stateMetaContentValueUnquotedValueQuoted = function (c) {
if (END_OF_UNQUOTED_ATTRIBUTE_VALUE.has(c)) {
// Quotes weren't matched, so we're done.
this.stateAttributeValueUnquoted(c);
}
else if (c === this.quoteCharacter) {
this.handleMetaContentValue();
this.state = State.AttributeValueUnquoted;
}
else {
this.attributeValue.push(c | 0x20);
}
};
Sniffer.prototype.stateMetaContentValueUnquotedValueUnquoted = function (c) {
if (END_OF_UNQUOTED_ATTRIBUTE_VALUE.has(c) || c === Chars.SEMICOLON) {
this.handleMetaContentValue();
this.state = State.AttributeValueUnquoted;
this.stateAttributeValueUnquoted(c);
}
else {
this.attributeValue.push(c | 0x20);
}
};
Sniffer.prototype.stateMetaContentValueQuotedValueUnquoted = function (c) {
if (isQuote(c) || SPACE_CHARACTERS.has(c) || c === Chars.SEMICOLON) {
this.handleMetaContentValue();
// We are done with the value, but might not be at the end of the attribute
this.state = State.AttributeValueQuoted;
this.stateAttributeValueQuoted(c);
}
else {
this.attributeValue.push(c | 0x20);
}
};
Sniffer.prototype.stateMetaContentValueQuotedValueQuoted = function (c) {
if (isQuote(c)) {
// We have reached the end of our value.
if (c !== this.quoteCharacter) {
// Only handle the value if inner quotes were matched.
this.handleMetaContentValue();
}
this.state = State.AttributeValueQuoted;
this.stateAttributeValueQuoted(c);
}
else {
this.attributeValue.push(c | 0x20);
}
};
Sniffer.prototype.stateMetaContentValueQuotedBeforeEncoding = function (c) {
if (c === this.quoteCharacter) {
this.stateAttributeValueQuoted(c);
}
else if (this.findMetaContentEncoding(c)) {
this.state = State.MetaContentValueQuotedAfterEncoding;
}
};
Sniffer.prototype.stateMetaContentValueQuotedAfterEncoding = function (c) {
if (c === Chars.EQUALS) {
this.state = State.MetaContentValueQuotedBeforeValue;
}
else if (!SPACE_CHARACTERS.has(c)) {
// Look for the next encoding
this.state = State.MetaContentValueQuotedBeforeEncoding;
this.stateMetaContentValueQuotedBeforeEncoding(c);
}
};
Sniffer.prototype.stateMetaContentValueQuotedBeforeValue = function (c) {
if (c === this.quoteCharacter) {
this.stateAttributeValueQuoted(c);
}
else if (isQuote(c)) {
this.state = State.MetaContentValueQuotedValueQuoted;
}
else if (!SPACE_CHARACTERS.has(c)) {
this.state = State.MetaContentValueQuotedValueUnquoted;
this.stateMetaContentValueQuotedValueUnquoted(c);
}
};
Sniffer.prototype.stateAttributeValueQuoted = function (c) {
if (c === this.quoteCharacter) {
this.handleAttributeValue();
this.state = State.BeforeAttribute;
}
else if (this.attribType === AttribType.Charset) {
this.attributeValue.push(c | 0x20);
}
};
// Read STRINGS.XML_DECLARATION
Sniffer.prototype.stateXMLDeclaration = function (c) {
if (this.advanceSection(STRINGS.XML_DECLARATION, c)) {
if (this.sectionIndex === STRINGS.XML_DECLARATION.length) {
this.sectionIndex = 0;
this.state = State.XMLDeclarationBeforeEncoding;
}
}
else {
this.state = State.WeirdTag;
}
};
Sniffer.prototype.stateXMLDeclarationBeforeEncoding = function (c) {
if (this.advanceSection(STRINGS.ENCODING, c)) {
if (this.sectionIndex === STRINGS.ENCODING.length) {
this.state = State.XMLDeclarationAfterEncoding;
}
}
else if (c === Chars.GT) {
this.state = State.BeforeTag;
}
else {
// If we encountered another `c`, assume we started over.
this.sectionIndex = Number(c === STRINGS.ENCODING[0]);
}
};
Sniffer.prototype.stateXMLDeclarationAfterEncoding = function (c) {
if (c === Chars.EQUALS) {
this.state = State.XMLDeclarationBeforeValue;
}
else if (c > Chars.SPACE) {
this.state = State.WeirdTag;
this.stateWeirdTag(c);
}
};
Sniffer.prototype.stateXMLDeclarationBeforeValue = function (c) {
if (isQuote(c)) {
this.attributeValue.length = 0;
this.state = State.XMLDeclarationValue;
}
else if (c > Chars.SPACE) {
this.state = State.WeirdTag;
this.stateWeirdTag(c);
}
};
Sniffer.prototype.stateXMLDeclarationValue = function (c) {
if (isQuote(c)) {
this.setResult(String.fromCharCode.apply(String, this.attributeValue), ResultType.XML_ENCODING);
this.state = State.WeirdTag;
}
else if (c === Chars.GT) {
this.state = State.BeforeTag;
}
else if (c <= Chars.SPACE) {
this.state = State.WeirdTag;
}
else {
this.attributeValue.push(c | 0x20);
}
};
Sniffer.prototype.write = function (buffer) {
var index = 0;
for (; index < buffer.length && this.offset + index < this.maxBytes; index++) {
var c = buffer[index];
switch (this.state) {
case State.Begin: {
this.stateBegin(c);
break;
}
case State.BOM16BE: {
this.stateBOM16BE(c);
break;
}
case State.BOM16LE: {
this.stateBOM16LE(c);
break;
}
case State.BOM8: {
this.stateBOM8(c);
break;
}
case State.UTF16LE_XML_PREFIX: {
this.stateUTF16LE_XML_PREFIX(c);
break;
}
case State.BeginLT: {
this.stateBeginLT(c);
break;
}
case State.UTF16BE_XML_PREFIX: {
this.stateUTF16BE_XML_PREFIX(c);
break;
}
case State.BeforeTag: {
// Optimization: Skip all characters until we find a `<`
var idx = buffer.indexOf(Chars.LT, index);
if (idx < 0) {
// We are done with this buffer. Stay in the state and try on the next one.
index = buffer.length;
}
else {
index = idx;
this.stateBeforeTag(Chars.LT);
}
break;
}
case State.BeforeTagName: {
this.stateBeforeTagName(c);
break;
}
case State.BeforeCloseTagName: {
this.stateBeforeCloseTagName(c);
break;
}
case State.CommentStart: {
this.stateCommentStart(c);
break;
}
case State.CommentEnd: {
this.stateCommentEnd(c);
break;
}
case State.TagNameMeta: {
this.stateTagNameMeta(c);
break;
}
case State.TagNameOther: {
this.stateTagNameOther(c);
break;
}
case State.XMLDeclaration: {
this.stateXMLDeclaration(c);
break;
}
case State.XMLDeclarationBeforeEncoding: {
this.stateXMLDeclarationBeforeEncoding(c);
break;
}
case State.XMLDeclarationAfterEncoding: {
this.stateXMLDeclarationAfterEncoding(c);
break;
}
case State.XMLDeclarationBeforeValue: {
this.stateXMLDeclarationBeforeValue(c);
break;
}
case State.XMLDeclarationValue: {
this.stateXMLDeclarationValue(c);
break;
}
case State.WeirdTag: {
this.stateWeirdTag(c);
break;
}
case State.BeforeAttribute: {
this.stateBeforeAttribute(c);
break;
}
case State.MetaAttribHttpEquiv: {
this.stateMetaAttribHttpEquiv(c);
break;
}
case State.MetaAttribHttpEquivValue: {
this.stateMetaAttribHttpEquivValue(c);
break;
}
case State.MetaAttribC: {
this.stateMetaAttribC(c);
break;
}
case State.MetaAttribContent: {
this.stateMetaAttribContent(c);
break;
}
case State.MetaAttribCharset: {
this.stateMetaAttribCharset(c);
break;
}
case State.MetaAttribAfterName: {
this.stateMetaAttribAfterName(c);
break;
}
case State.MetaContentValueQuotedBeforeEncoding: {
this.stateMetaContentValueQuotedBeforeEncoding(c);
break;
}
case State.MetaContentValueQuotedAfterEncoding: {
this.stateMetaContentValueQuotedAfterEncoding(c);
break;
}
case State.MetaContentValueQuotedBeforeValue: {
this.stateMetaContentValueQuotedBeforeValue(c);
break;
}
case State.MetaContentValueQuotedValueQuoted: {
this.stateMetaContentValueQuotedValueQuoted(c);
break;
}
case State.MetaContentValueQuotedValueUnquoted: {
this.stateMetaContentValueQuotedValueUnquoted(c);
break;
}
case State.MetaContentValueUnquotedBeforeEncoding: {
this.stateMetaContentValueUnquotedBeforeEncoding(c);
break;
}
case State.MetaContentValueUnquotedBeforeValue: {
this.stateMetaContentValueUnquotedBeforeValue(c);
break;
}
case State.MetaContentValueUnquotedValueQuoted: {
this.stateMetaContentValueUnquotedValueQuoted(c);
break;
}
case State.MetaContentValueUnquotedValueUnquoted: {
this.stateMetaContentValueUnquotedValueUnquoted(c);
break;
}
case State.AnyAttribName: {
this.stateAnyAttribName(c);
break;
}
case State.AfterAttributeName: {
this.stateAfterAttributeName(c);
break;
}
case State.BeforeAttributeValue: {
this.stateBeforeAttributeValue(c);
break;
}
case State.AttributeValueQuoted: {
this.stateAttributeValueQuoted(c);
break;
}
default: {
// (State.AttributeValueUnquoted)
this.stateAttributeValueUnquoted(c);
}
}
}
this.offset += index;
};
return Sniffer;
}());
export { Sniffer };
/** Get the encoding for the passed buffer. */
export function getEncoding(buffer, options) {
var sniffer = new Sniffer(options);
sniffer.write(buffer);
return sniffer.encoding;
}
//# sourceMappingURL=sniffer.js.map