angular2
Version:
Angular 2 - a web framework for modern web apps
439 lines • 52.4 kB
JavaScript
var __decorate = (this && this.__decorate) || function (decorators, target, key, desc) {
var c = arguments.length, r = c < 3 ? target : desc === null ? desc = Object.getOwnPropertyDescriptor(target, key) : desc, d;
if (typeof Reflect === "object" && typeof Reflect.decorate === "function") r = Reflect.decorate(decorators, target, key, desc);
else for (var i = decorators.length - 1; i >= 0; i--) if (d = decorators[i]) r = (c < 3 ? d(r) : c > 3 ? d(target, key, r) : d(target, key)) || r;
return c > 3 && r && Object.defineProperty(target, key, r), r;
};
var __metadata = (this && this.__metadata) || function (k, v) {
if (typeof Reflect === "object" && typeof Reflect.metadata === "function") return Reflect.metadata(k, v);
};
import { Injectable } from 'angular2/src/core/di/decorators';
import { SetWrapper } from "angular2/src/facade/collection";
import { NumberWrapper, StringJoiner, StringWrapper, isPresent } from "angular2/src/facade/lang";
import { BaseException } from 'angular2/src/facade/exceptions';
export var TokenType;
(function (TokenType) {
TokenType[TokenType["Character"] = 0] = "Character";
TokenType[TokenType["Identifier"] = 1] = "Identifier";
TokenType[TokenType["Keyword"] = 2] = "Keyword";
TokenType[TokenType["String"] = 3] = "String";
TokenType[TokenType["Operator"] = 4] = "Operator";
TokenType[TokenType["Number"] = 5] = "Number";
})(TokenType || (TokenType = {}));
export let Lexer = class Lexer {
tokenize(text) {
var scanner = new _Scanner(text);
var tokens = [];
var token = scanner.scanToken();
while (token != null) {
tokens.push(token);
token = scanner.scanToken();
}
return tokens;
}
};
Lexer = __decorate([
Injectable(),
__metadata('design:paramtypes', [])
], Lexer);
export class Token {
constructor(index, type, numValue, strValue) {
this.index = index;
this.type = type;
this.numValue = numValue;
this.strValue = strValue;
}
isCharacter(code) {
return (this.type == TokenType.Character && this.numValue == code);
}
isNumber() { return (this.type == TokenType.Number); }
isString() { return (this.type == TokenType.String); }
isOperator(operater) {
return (this.type == TokenType.Operator && this.strValue == operater);
}
isIdentifier() { return (this.type == TokenType.Identifier); }
isKeyword() { return (this.type == TokenType.Keyword); }
isKeywordDeprecatedVar() {
return (this.type == TokenType.Keyword && this.strValue == "var");
}
isKeywordLet() { return (this.type == TokenType.Keyword && this.strValue == "let"); }
isKeywordNull() { return (this.type == TokenType.Keyword && this.strValue == "null"); }
isKeywordUndefined() {
return (this.type == TokenType.Keyword && this.strValue == "undefined");
}
isKeywordTrue() { return (this.type == TokenType.Keyword && this.strValue == "true"); }
isKeywordFalse() { return (this.type == TokenType.Keyword && this.strValue == "false"); }
toNumber() {
// -1 instead of NULL ok?
return (this.type == TokenType.Number) ? this.numValue : -1;
}
toString() {
switch (this.type) {
case TokenType.Character:
case TokenType.Identifier:
case TokenType.Keyword:
case TokenType.Operator:
case TokenType.String:
return this.strValue;
case TokenType.Number:
return this.numValue.toString();
default:
return null;
}
}
}
function newCharacterToken(index, code) {
return new Token(index, TokenType.Character, code, StringWrapper.fromCharCode(code));
}
function newIdentifierToken(index, text) {
return new Token(index, TokenType.Identifier, 0, text);
}
function newKeywordToken(index, text) {
return new Token(index, TokenType.Keyword, 0, text);
}
function newOperatorToken(index, text) {
return new Token(index, TokenType.Operator, 0, text);
}
function newStringToken(index, text) {
return new Token(index, TokenType.String, 0, text);
}
function newNumberToken(index, n) {
return new Token(index, TokenType.Number, n, "");
}
export var EOF = new Token(-1, TokenType.Character, 0, "");
export const $EOF = 0;
export const $TAB = 9;
export const $LF = 10;
export const $VTAB = 11;
export const $FF = 12;
export const $CR = 13;
export const $SPACE = 32;
export const $BANG = 33;
export const $DQ = 34;
export const $HASH = 35;
export const $$ = 36;
export const $PERCENT = 37;
export const $AMPERSAND = 38;
export const $SQ = 39;
export const $LPAREN = 40;
export const $RPAREN = 41;
export const $STAR = 42;
export const $PLUS = 43;
export const $COMMA = 44;
export const $MINUS = 45;
export const $PERIOD = 46;
export const $SLASH = 47;
export const $COLON = 58;
export const $SEMICOLON = 59;
export const $LT = 60;
export const $EQ = 61;
export const $GT = 62;
export const $QUESTION = 63;
const $0 = 48;
const $9 = 57;
const $A = 65, $E = 69, $Z = 90;
export const $LBRACKET = 91;
export const $BACKSLASH = 92;
export const $RBRACKET = 93;
const $CARET = 94;
const $_ = 95;
export const $BT = 96;
const $a = 97, $e = 101, $f = 102, $n = 110, $r = 114, $t = 116, $u = 117, $v = 118, $z = 122;
export const $LBRACE = 123;
export const $BAR = 124;
export const $RBRACE = 125;
const $NBSP = 160;
export class ScannerError extends BaseException {
constructor(message) {
super();
this.message = message;
}
toString() { return this.message; }
}
class _Scanner {
constructor(input) {
this.input = input;
this.peek = 0;
this.index = -1;
this.length = input.length;
this.advance();
}
advance() {
this.peek =
++this.index >= this.length ? $EOF : StringWrapper.charCodeAt(this.input, this.index);
}
scanToken() {
var input = this.input, length = this.length, peek = this.peek, index = this.index;
// Skip whitespace.
while (peek <= $SPACE) {
if (++index >= length) {
peek = $EOF;
break;
}
else {
peek = StringWrapper.charCodeAt(input, index);
}
}
this.peek = peek;
this.index = index;
if (index >= length) {
return null;
}
// Handle identifiers and numbers.
if (isIdentifierStart(peek))
return this.scanIdentifier();
if (isDigit(peek))
return this.scanNumber(index);
var start = index;
switch (peek) {
case $PERIOD:
this.advance();
return isDigit(this.peek) ? this.scanNumber(start) : newCharacterToken(start, $PERIOD);
case $LPAREN:
case $RPAREN:
case $LBRACE:
case $RBRACE:
case $LBRACKET:
case $RBRACKET:
case $COMMA:
case $COLON:
case $SEMICOLON:
return this.scanCharacter(start, peek);
case $SQ:
case $DQ:
return this.scanString();
case $HASH:
case $PLUS:
case $MINUS:
case $STAR:
case $SLASH:
case $PERCENT:
case $CARET:
return this.scanOperator(start, StringWrapper.fromCharCode(peek));
case $QUESTION:
return this.scanComplexOperator(start, '?', $PERIOD, '.');
case $LT:
case $GT:
return this.scanComplexOperator(start, StringWrapper.fromCharCode(peek), $EQ, '=');
case $BANG:
case $EQ:
return this.scanComplexOperator(start, StringWrapper.fromCharCode(peek), $EQ, '=', $EQ, '=');
case $AMPERSAND:
return this.scanComplexOperator(start, '&', $AMPERSAND, '&');
case $BAR:
return this.scanComplexOperator(start, '|', $BAR, '|');
case $NBSP:
while (isWhitespace(this.peek))
this.advance();
return this.scanToken();
}
this.error(`Unexpected character [${StringWrapper.fromCharCode(peek)}]`, 0);
return null;
}
scanCharacter(start, code) {
this.advance();
return newCharacterToken(start, code);
}
scanOperator(start, str) {
this.advance();
return newOperatorToken(start, str);
}
/**
* Tokenize a 2/3 char long operator
*
* @param start start index in the expression
* @param one first symbol (always part of the operator)
* @param twoCode code point for the second symbol
* @param two second symbol (part of the operator when the second code point matches)
* @param threeCode code point for the third symbol
* @param three third symbol (part of the operator when provided and matches source expression)
* @returns {Token}
*/
scanComplexOperator(start, one, twoCode, two, threeCode, three) {
this.advance();
var str = one;
if (this.peek == twoCode) {
this.advance();
str += two;
}
if (isPresent(threeCode) && this.peek == threeCode) {
this.advance();
str += three;
}
return newOperatorToken(start, str);
}
scanIdentifier() {
var start = this.index;
this.advance();
while (isIdentifierPart(this.peek))
this.advance();
var str = this.input.substring(start, this.index);
if (SetWrapper.has(KEYWORDS, str)) {
return newKeywordToken(start, str);
}
else {
return newIdentifierToken(start, str);
}
}
scanNumber(start) {
var simple = (this.index === start);
this.advance(); // Skip initial digit.
while (true) {
if (isDigit(this.peek)) {
}
else if (this.peek == $PERIOD) {
simple = false;
}
else if (isExponentStart(this.peek)) {
this.advance();
if (isExponentSign(this.peek))
this.advance();
if (!isDigit(this.peek))
this.error('Invalid exponent', -1);
simple = false;
}
else {
break;
}
this.advance();
}
var str = this.input.substring(start, this.index);
// TODO
var value = simple ? NumberWrapper.parseIntAutoRadix(str) : NumberWrapper.parseFloat(str);
return newNumberToken(start, value);
}
scanString() {
var start = this.index;
var quote = this.peek;
this.advance(); // Skip initial quote.
var buffer;
var marker = this.index;
var input = this.input;
while (this.peek != quote) {
if (this.peek == $BACKSLASH) {
if (buffer == null)
buffer = new StringJoiner();
buffer.add(input.substring(marker, this.index));
this.advance();
var unescapedCode;
if (this.peek == $u) {
// 4 character hex code for unicode character.
var hex = input.substring(this.index + 1, this.index + 5);
try {
unescapedCode = NumberWrapper.parseInt(hex, 16);
}
catch (e) {
this.error(`Invalid unicode escape [\\u${hex}]`, 0);
}
for (var i = 0; i < 5; i++) {
this.advance();
}
}
else {
unescapedCode = unescape(this.peek);
this.advance();
}
buffer.add(StringWrapper.fromCharCode(unescapedCode));
marker = this.index;
}
else if (this.peek == $EOF) {
this.error('Unterminated quote', 0);
}
else {
this.advance();
}
}
var last = input.substring(marker, this.index);
this.advance(); // Skip terminating quote.
// Compute the unescaped string value.
var unescaped = last;
if (buffer != null) {
buffer.add(last);
unescaped = buffer.toString();
}
return newStringToken(start, unescaped);
}
error(message, offset) {
var position = this.index + offset;
throw new ScannerError(`Lexer Error: ${message} at column ${position} in expression [${this.input}]`);
}
}
function isWhitespace(code) {
return (code >= $TAB && code <= $SPACE) || (code == $NBSP);
}
function isIdentifierStart(code) {
return ($a <= code && code <= $z) || ($A <= code && code <= $Z) || (code == $_) || (code == $$);
}
export function isIdentifier(input) {
if (input.length == 0)
return false;
var scanner = new _Scanner(input);
if (!isIdentifierStart(scanner.peek))
return false;
scanner.advance();
while (scanner.peek !== $EOF) {
if (!isIdentifierPart(scanner.peek))
return false;
scanner.advance();
}
return true;
}
function isIdentifierPart(code) {
return ($a <= code && code <= $z) || ($A <= code && code <= $Z) || ($0 <= code && code <= $9) ||
(code == $_) || (code == $$);
}
function isDigit(code) {
return $0 <= code && code <= $9;
}
function isExponentStart(code) {
return code == $e || code == $E;
}
function isExponentSign(code) {
return code == $MINUS || code == $PLUS;
}
export function isQuote(code) {
return code === $SQ || code === $DQ || code === $BT;
}
function unescape(code) {
switch (code) {
case $n:
return $LF;
case $f:
return $FF;
case $r:
return $CR;
case $t:
return $TAB;
case $v:
return $VTAB;
default:
return code;
}
}
var OPERATORS = SetWrapper.createFromList([
'+',
'-',
'*',
'/',
'%',
'^',
'=',
'==',
'!=',
'===',
'!==',
'<',
'>',
'<=',
'>=',
'&&',
'||',
'&',
'|',
'!',
'?',
'#',
'?.'
]);
var KEYWORDS = SetWrapper.createFromList(['var', 'let', 'null', 'undefined', 'true', 'false', 'if', 'else']);
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{Injectable} from 'angular2/src/core/di/decorators';\nimport {ListWrapper, SetWrapper} from \"angular2/src/facade/collection\";\nimport {NumberWrapper, StringJoiner, StringWrapper, isPresent} from \"angular2/src/facade/lang\";\nimport {BaseException} from 'angular2/src/facade/exceptions';\n\nexport enum TokenType {\n  Character,\n  Identifier,\n  Keyword,\n  String,\n  Operator,\n  Number\n}\n\n@Injectable()\nexport class Lexer {\n  tokenize(text: string): any[] {\n    var scanner = new _Scanner(text);\n    var tokens = [];\n    var token = scanner.scanToken();\n    while (token != null) {\n      tokens.push(token);\n      token = scanner.scanToken();\n    }\n    return tokens;\n  }\n}\n\nexport class Token {\n  constructor(public index: number, public type: TokenType, public numValue: number,\n              public strValue: string) {}\n\n  isCharacter(code: number): boolean {\n    return (this.type == TokenType.Character && this.numValue == code);\n  }\n\n  isNumber(): boolean { return (this.type == TokenType.Number); }\n\n  isString(): boolean { return (this.type == TokenType.String); }\n\n  isOperator(operater: string): boolean {\n    return (this.type == TokenType.Operator && this.strValue == operater);\n  }\n\n  isIdentifier(): boolean { return (this.type == TokenType.Identifier); }\n\n  isKeyword(): boolean { return (this.type == TokenType.Keyword); }\n\n  isKeywordDeprecatedVar(): boolean {\n    return (this.type == TokenType.Keyword && this.strValue == \"var\");\n  }\n\n  isKeywordLet(): boolean { return (this.type == TokenType.Keyword && this.strValue == \"let\"); }\n\n  isKeywordNull(): boolean { return (this.type == TokenType.Keyword && this.strValue == \"null\"); }\n\n  isKeywordUndefined(): boolean {\n    return (this.type == TokenType.Keyword && this.strValue == \"undefined\");\n  }\n\n  isKeywordTrue(): boolean { return (this.type == TokenType.Keyword && this.strValue == \"true\"); }\n\n  isKeywordFalse(): boolean { return (this.type == TokenType.Keyword && this.strValue == \"false\"); }\n\n  toNumber(): number {\n    // -1 instead of NULL ok?\n    return (this.type == TokenType.Number) ? this.numValue : -1;\n  }\n\n  toString(): string {\n    switch (this.type) {\n      case TokenType.Character:\n      case TokenType.Identifier:\n      case TokenType.Keyword:\n      case TokenType.Operator:\n      case TokenType.String:\n        return this.strValue;\n      case TokenType.Number:\n        return this.numValue.toString();\n      default:\n        return null;\n    }\n  }\n}\n\nfunction newCharacterToken(index: number, code: number): Token {\n  return new Token(index, TokenType.Character, code, StringWrapper.fromCharCode(code));\n}\n\nfunction newIdentifierToken(index: number, text: string): Token {\n  return new Token(index, TokenType.Identifier, 0, text);\n}\n\nfunction newKeywordToken(index: number, text: string): Token {\n  return new Token(index, TokenType.Keyword, 0, text);\n}\n\nfunction newOperatorToken(index: number, text: string): Token {\n  return new Token(index, TokenType.Operator, 0, text);\n}\n\nfunction newStringToken(index: number, text: string): Token {\n  return new Token(index, TokenType.String, 0, text);\n}\n\nfunction newNumberToken(index: number, n: number): Token {\n  return new Token(index, TokenType.Number, n, \"\");\n}\n\n\nexport var EOF: Token = new Token(-1, TokenType.Character, 0, \"\");\n\nexport const $EOF = 0;\nexport const $TAB = 9;\nexport const $LF = 10;\nexport const $VTAB = 11;\nexport const $FF = 12;\nexport const $CR = 13;\nexport const $SPACE = 32;\nexport const $BANG = 33;\nexport const $DQ = 34;\nexport const $HASH = 35;\nexport const $$ = 36;\nexport const $PERCENT = 37;\nexport const $AMPERSAND = 38;\nexport const $SQ = 39;\nexport const $LPAREN = 40;\nexport const $RPAREN = 41;\nexport const $STAR = 42;\nexport const $PLUS = 43;\nexport const $COMMA = 44;\nexport const $MINUS = 45;\nexport const $PERIOD = 46;\nexport const $SLASH = 47;\nexport const $COLON = 58;\nexport const $SEMICOLON = 59;\nexport const $LT = 60;\nexport const $EQ = 61;\nexport const $GT = 62;\nexport const $QUESTION = 63;\n\nconst $0 = 48;\nconst $9 = 57;\n\nconst $A = 65, $E = 69, $Z = 90;\n\nexport const $LBRACKET = 91;\nexport const $BACKSLASH = 92;\nexport const $RBRACKET = 93;\nconst $CARET = 94;\nconst $_ = 95;\nexport const $BT = 96;\nconst $a = 97, $e = 101, $f = 102, $n = 110, $r = 114, $t = 116, $u = 117, $v = 118, $z = 122;\n\nexport const $LBRACE = 123;\nexport const $BAR = 124;\nexport const $RBRACE = 125;\nconst $NBSP = 160;\n\nexport class ScannerError extends BaseException {\n  constructor(public message) { super(); }\n\n  toString(): string { return this.message; }\n}\n\nclass _Scanner {\n  length: number;\n  peek: number = 0;\n  index: number = -1;\n\n  constructor(public input: string) {\n    this.length = input.length;\n    this.advance();\n  }\n\n  advance() {\n    this.peek =\n        ++this.index >= this.length ? $EOF : StringWrapper.charCodeAt(this.input, this.index);\n  }\n\n  scanToken(): Token {\n    var input = this.input, length = this.length, peek = this.peek, index = this.index;\n\n    // Skip whitespace.\n    while (peek <= $SPACE) {\n      if (++index >= length) {\n        peek = $EOF;\n        break;\n      } else {\n        peek = StringWrapper.charCodeAt(input, index);\n      }\n    }\n\n    this.peek = peek;\n    this.index = index;\n\n    if (index >= length) {\n      return null;\n    }\n\n    // Handle identifiers and numbers.\n    if (isIdentifierStart(peek)) return this.scanIdentifier();\n    if (isDigit(peek)) return this.scanNumber(index);\n\n    var start: number = index;\n    switch (peek) {\n      case $PERIOD:\n        this.advance();\n        return isDigit(this.peek) ? this.scanNumber(start) : newCharacterToken(start, $PERIOD);\n      case $LPAREN:\n      case $RPAREN:\n      case $LBRACE:\n      case $RBRACE:\n      case $LBRACKET:\n      case $RBRACKET:\n      case $COMMA:\n      case $COLON:\n      case $SEMICOLON:\n        return this.scanCharacter(start, peek);\n      case $SQ:\n      case $DQ:\n        return this.scanString();\n      case $HASH:\n      case $PLUS:\n      case $MINUS:\n      case $STAR:\n      case $SLASH:\n      case $PERCENT:\n      case $CARET:\n        return this.scanOperator(start, StringWrapper.fromCharCode(peek));\n      case $QUESTION:\n        return this.scanComplexOperator(start, '?', $PERIOD, '.');\n      case $LT:\n      case $GT:\n        return this.scanComplexOperator(start, StringWrapper.fromCharCode(peek), $EQ, '=');\n      case $BANG:\n      case $EQ:\n        return this.scanComplexOperator(start, StringWrapper.fromCharCode(peek), $EQ, '=', $EQ,\n                                        '=');\n      case $AMPERSAND:\n        return this.scanComplexOperator(start, '&', $AMPERSAND, '&');\n      case $BAR:\n        return this.scanComplexOperator(start, '|', $BAR, '|');\n      case $NBSP:\n        while (isWhitespace(this.peek)) this.advance();\n        return this.scanToken();\n    }\n\n    this.error(`Unexpected character [${StringWrapper.fromCharCode(peek)}]`, 0);\n    return null;\n  }\n\n  scanCharacter(start: number, code: number): Token {\n    this.advance();\n    return newCharacterToken(start, code);\n  }\n\n\n  scanOperator(start: number, str: string): Token {\n    this.advance();\n    return newOperatorToken(start, str);\n  }\n\n  /**\n   * Tokenize a 2/3 char long operator\n   *\n   * @param start start index in the expression\n   * @param one first symbol (always part of the operator)\n   * @param twoCode code point for the second symbol\n   * @param two second symbol (part of the operator when the second code point matches)\n   * @param threeCode code point for the third symbol\n   * @param three third symbol (part of the operator when provided and matches source expression)\n   * @returns {Token}\n   */\n  scanComplexOperator(start: number, one: string, twoCode: number, two: string, threeCode?: number,\n                      three?: string): Token {\n    this.advance();\n    var str: string = one;\n    if (this.peek == twoCode) {\n      this.advance();\n      str += two;\n    }\n    if (isPresent(threeCode) && this.peek == threeCode) {\n      this.advance();\n      str += three;\n    }\n    return newOperatorToken(start, str);\n  }\n\n  scanIdentifier(): Token {\n    var start: number = this.index;\n    this.advance();\n    while (isIdentifierPart(this.peek)) this.advance();\n    var str: string = this.input.substring(start, this.index);\n    if (SetWrapper.has(KEYWORDS, str)) {\n      return newKeywordToken(start, str);\n    } else {\n      return newIdentifierToken(start, str);\n    }\n  }\n\n  scanNumber(start: number): Token {\n    var simple: boolean = (this.index === start);\n    this.advance();  // Skip initial digit.\n    while (true) {\n      if (isDigit(this.peek)) {\n        // Do nothing.\n      } else if (this.peek == $PERIOD) {\n        simple = false;\n      } else if (isExponentStart(this.peek)) {\n        this.advance();\n        if (isExponentSign(this.peek)) this.advance();\n        if (!isDigit(this.peek)) this.error('Invalid exponent', -1);\n        simple = false;\n      } else {\n        break;\n      }\n      this.advance();\n    }\n    var str: string = this.input.substring(start, this.index);\n    // TODO\n    var value: number =\n        simple ? NumberWrapper.parseIntAutoRadix(str) : NumberWrapper.parseFloat(str);\n    return newNumberToken(start, value);\n  }\n\n  scanString(): Token {\n    var start: number = this.index;\n    var quote: number = this.peek;\n    this.advance();  // Skip initial quote.\n\n    var buffer: StringJoiner;\n    var marker: number = this.index;\n    var input: string = this.input;\n\n    while (this.peek != quote) {\n      if (this.peek == $BACKSLASH) {\n        if (buffer == null) buffer = new StringJoiner();\n        buffer.add(input.substring(marker, this.index));\n        this.advance();\n        var unescapedCode: number;\n        if (this.peek == $u) {\n          // 4 character hex code for unicode character.\n          var hex: string = input.substring(this.index + 1, this.index + 5);\n          try {\n            unescapedCode = NumberWrapper.parseInt(hex, 16);\n          } catch (e) {\n            this.error(`Invalid unicode escape [\\\\u${hex}]`, 0);\n          }\n          for (var i: number = 0; i < 5; i++) {\n            this.advance();\n          }\n        } else {\n          unescapedCode = unescape(this.peek);\n          this.advance();\n        }\n        buffer.add(StringWrapper.fromCharCode(unescapedCode));\n        marker = this.index;\n      } else if (this.peek == $EOF) {\n        this.error('Unterminated quote', 0);\n      } else {\n        this.advance();\n      }\n    }\n\n    var last: string = input.substring(marker, this.index);\n    this.advance();  // Skip terminating quote.\n\n    // Compute the unescaped string value.\n    var unescaped: string = last;\n    if (buffer != null) {\n      buffer.add(last);\n      unescaped = buffer.toString();\n    }\n    return newStringToken(start, unescaped);\n  }\n\n  error(message: string, offset: number) {\n    var position: number = this.index + offset;\n    throw new ScannerError(\n        `Lexer Error: ${message} at column ${position} in expression [${this.input}]`);\n  }\n}\n\nfunction isWh