CasperSecurity
"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
exports.Tokenizer = void 0;
var error_handler_1 = require("./error-handler");
var scanner_1 = require("./scanner");
var token_1 = require("./token");
var Reader = /** @class */ (function () {
function Reader() {
this.values = [];
this.curly = this.paren = -1;
}
// A function following one of those tokens is an expression.
Reader.prototype.beforeFunctionExpression = function (t) {
return ['(', '{', '[', 'in', 'typeof', 'instanceof', 'new',
'return', 'case', 'delete', 'throw', 'void',
// assignment operators
'=', '+=', '-=', '*=', '**=', '/=', '%=', '<<=', '>>=', '>>>=',
'&=', '|=', '^=', ',',
// binary/unary operators
'+', '-', '*', '**', '/', '%', '++', '--', '<<', '>>', '>>>', '&',
'|', '^', '!', '~', '&&', '||', '?', ':', '===', '==', '>=',
'<=', '<', '>', '!=', '!=='].indexOf(t) >= 0;
};
// Determine if forward slash (/) is an operator or part of a regular expression
// https://github.com/mozilla/sweet.js/wiki/design
Reader.prototype.isRegexStart = function () {
var previous = this.values[this.values.length - 1];
var regex = (previous !== null);
switch (previous) {
case 'this':
case ']':
regex = false;
break;
case ')':
var keyword = this.values[this.paren - 1];
regex = (keyword === 'if' || keyword === 'while' || keyword === 'for' || keyword === 'with');
break;
case '}':
// Dividing a function by anything makes little sense,
// but we have to check for that.
regex = false;
if (this.values[this.curly - 3] === 'function') {
// Anonymous function, e.g. function(){} /42
var check = this.values[this.curly - 4];
regex = check ? !this.beforeFunctionExpression(check) : false;
}
else if (this.values[this.curly - 4] === 'function') {
// Named function, e.g. function f(){} /42/
var check = this.values[this.curly - 5];
regex = check ? !this.beforeFunctionExpression(check) : true;
}
break;
default:
break;
}
return regex;
};
Reader.prototype.push = function (token) {
if (token.type === 7 /* Punctuator */ || token.type === 4 /* Keyword */) {
if (token.value === '{') {
this.curly = this.values.length;
}
else if (token.value === '(') {
this.paren = this.values.length;
}
this.values.push(token.value);
}
else {
this.values.push(null);
}
};
return Reader;
}());
var Tokenizer = /** @class */ (function () {
function Tokenizer(code, config) {
this.errorHandler = new error_handler_1.ErrorHandler();
this.errorHandler.tolerant = config ? (typeof config.tolerant === 'boolean' && config.tolerant) : false;
this.scanner = new scanner_1.Scanner(code, this.errorHandler);
this.scanner.trackComment = config ? (typeof config.comment === 'boolean' && config.comment) : false;
this.trackRange = config ? (typeof config.range === 'boolean' && config.range) : false;
this.trackLoc = config ? (typeof config.loc === 'boolean' && config.loc) : false;
this.buffer = [];
this.reader = new Reader();
}
Tokenizer.prototype.errors = function () {
return this.errorHandler.errors;
};
Tokenizer.prototype.getNextToken = function () {
if (this.buffer.length === 0) {
var comments = this.scanner.scanComments();
if (this.scanner.trackComment) {
for (var i = 0; i < comments.length; ++i) {
var e = comments[i];
var value = this.scanner.source.slice(e.slice[0], e.slice[1]);
var comment = {
type: e.multiLine ? 'BlockComment' : 'LineComment',
value: value
};
if (this.trackRange) {
comment.range = e.range;
}
if (this.trackLoc) {
comment.loc = e.loc;
}
this.buffer.push(comment);
}
}
if (!this.scanner.eof()) {
var loc = void 0;
if (this.trackLoc) {
loc = {
start: {
line: this.scanner.lineNumber,
column: this.scanner.index - this.scanner.lineStart
},
end: {}
};
}
var startRegex = (this.scanner.source[this.scanner.index] === '/') && this.reader.isRegexStart();
var token = startRegex ? this.scanner.scanRegExp() : this.scanner.lex();
this.reader.push(token);
var entry = {
type: token_1.TokenName[token.type],
value: this.scanner.source.slice(token.start, token.end)
};
if (this.trackRange) {
entry.range = [token.start, token.end];
}
if (this.trackLoc) {
loc.end = {
line: this.scanner.lineNumber,
column: this.scanner.index - this.scanner.lineStart
};
entry.loc = loc;
}
if (token.type === 9 /* RegularExpression */) {
var pattern = token.pattern;
var flags = token.flags;
entry.regex = { pattern: pattern, flags: flags };
}
this.buffer.push(entry);
}
}
return this.buffer.shift();
};
return Tokenizer;
}());
exports.Tokenizer = Tokenizer;