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Revert "feat(Compiler): case sensitive html parser"

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This reverts commit 86aeb8be0a.
This commit is contained in:
vsavkin
2015-11-16 14:37:00 -08:00
parent 0611239a0e
commit 4e1d9c93df
14 changed files with 669 additions and 1673 deletions
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478
modules/angular2/src/compiler/html_lexer.ts
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@ -1,478 +0,0 @@
import {
StringWrapper,
NumberWrapper,
isPresent,
isBlank,
CONST_EXPR,
serializeEnum
} from 'angular2/src/facade/lang';
import {BaseException} from 'angular2/src/facade/exceptions';
import {ParseLocation, ParseError, ParseSourceFile, ParseSourceSpan} from './parse_util';
import {getHtmlTagDefinition, HtmlTagContentType, NAMED_ENTITIES} from './html_tags';
export enum HtmlTokenType {
TAG_OPEN_START,
TAG_OPEN_END,
TAG_OPEN_END_VOID,
TAG_CLOSE,
TEXT,
ESCAPABLE_RAW_TEXT,
RAW_TEXT,
COMMENT_START,
COMMENT_END,
CDATA_START,
CDATA_END,
ATTR_NAME,
ATTR_VALUE,
DOC_TYPE,
EOF
}
export class HtmlToken {
constructor(public type: HtmlTokenType, public parts: string[],
public sourceSpan: ParseSourceSpan) {}
}
export class HtmlTokenError extends ParseError {
constructor(errorMsg: string, public tokenType: HtmlTokenType, location: ParseLocation) {
super(location, errorMsg);
}
}
export class HtmlTokenizeResult {
constructor(public tokens: HtmlToken[], public errors: HtmlTokenError[]) {}
}
export function tokenizeHtml(sourceContent: string, sourceUrl: string): HtmlTokenizeResult {
return new _HtmlTokenizer(new ParseSourceFile(sourceContent, sourceUrl)).tokenize();
}
const $EOF = 0;
const $TAB = 9;
const $LF = 10;
const $CR = 13;
const $SPACE = 32;
const $BANG = 33;
const $DQ = 34;
const $$ = 36;
const $AMPERSAND = 38;
const $SQ = 39;
const $MINUS = 45;
const $SLASH = 47;
const $0 = 48;
const $SEMICOLON = 59;
const $9 = 57;
const $COLON = 58;
const $LT = 60;
const $EQ = 61;
const $GT = 62;
const $QUESTION = 63;
const $A = 65;
const $Z = 90;
const $LBRACKET = 91;
const $RBRACKET = 93;
const $a = 97;
const $z = 122;
const $NBSP = 160;
function unexpectedCharacterErrorMsg(charCode: number): string {
var char = charCode === $EOF ? 'EOF' : StringWrapper.fromCharCode(charCode);
return `Unexpected character "${char}"`;
}
function unknownEntityErrorMsg(entitySrc: string): string {
return `Unknown entity "${entitySrc}"`;
}
class ControlFlowError {
constructor(public error: HtmlTokenError) {}
}
// See http://www.w3.org/TR/html51/syntax.html#writing
class _HtmlTokenizer {
private input: string;
private inputLowercase: string;
private length: number;
// Note: this is always lowercase!
private peek: number = -1;
private index: number = -1;
private line: number = 0;
private column: number = -1;
private currentTokenStart: ParseLocation;
private currentTokenType: HtmlTokenType;
tokens: HtmlToken[] = [];
errors: HtmlTokenError[] = [];
constructor(private file: ParseSourceFile) {
this.input = file.content;
this.inputLowercase = file.content.toLowerCase();
this.length = file.content.length;
this._advance();
}
tokenize(): HtmlTokenizeResult {
while (this.peek !== $EOF) {
var start = this._getLocation();
try {
if (this._attemptChar($LT)) {
if (this._attemptChar($BANG)) {
if (this._attemptChar($LBRACKET)) {
this._consumeCdata(start);
} else if (this._attemptChar($MINUS)) {
this._consumeComment(start);
} else {
this._consumeDocType(start);
}
} else if (this._attemptChar($SLASH)) {
this._consumeTagClose(start);
} else {
this._consumeTagOpen(start);
}
} else {
this._consumeText();
}
} catch (e) {
if (e instanceof ControlFlowError) {
this.errors.push(e.error);
} else {
throw e;
}
}
}
this._beginToken(HtmlTokenType.EOF);
this._endToken([]);
return new HtmlTokenizeResult(this.tokens, this.errors);
}
private _getLocation(): ParseLocation {
return new ParseLocation(this.file, this.index, this.line, this.column);
}
private _beginToken(type: HtmlTokenType, start: ParseLocation = null) {
if (isBlank(start)) {
start = this._getLocation();
}
this.currentTokenStart = start;
this.currentTokenType = type;
}
private _endToken(parts: string[], end: ParseLocation = null): HtmlToken {
if (isBlank(end)) {
end = this._getLocation();
}
var token = new HtmlToken(this.currentTokenType, parts,
new ParseSourceSpan(this.currentTokenStart, end));
this.tokens.push(token);
this.currentTokenStart = null;
this.currentTokenType = null;
return token;
}
private _createError(msg: string, position: ParseLocation): ControlFlowError {
var error = new HtmlTokenError(msg, this.currentTokenType, position);
this.currentTokenStart = null;
this.currentTokenType = null;
return new ControlFlowError(error);
}
private _advance() {
if (this.index >= this.length) {
throw this._createError(unexpectedCharacterErrorMsg($EOF), this._getLocation());
}
if (this.peek === $LF) {
this.line++;
this.column = 0;
} else if (this.peek !== $LF && this.peek !== $CR) {
this.column++;
}
this.index++;
this.peek = this.index >= this.length ? $EOF : StringWrapper.charCodeAt(this.inputLowercase,
this.index);
}
private _attemptChar(charCode: number): boolean {
if (this.peek === charCode) {
this._advance();
return true;
}
return false;
}
private _requireChar(charCode: number) {
var location = this._getLocation();
if (!this._attemptChar(charCode)) {
throw this._createError(unexpectedCharacterErrorMsg(this.peek), location);
}
}
private _attemptChars(chars: string): boolean {
for (var i = 0; i < chars.length; i++) {
if (!this._attemptChar(StringWrapper.charCodeAt(chars, i))) {
return false;
}
}
return true;
}
private _requireChars(chars: string) {
var location = this._getLocation();
if (!this._attemptChars(chars)) {
throw this._createError(unexpectedCharacterErrorMsg(this.peek), location);
}
}
private _attemptUntilFn(predicate: Function) {
while (!predicate(this.peek)) {
this._advance();
}
}
private _requireUntilFn(predicate: Function, len: number) {
var start = this._getLocation();
this._attemptUntilFn(predicate);
if (this.index - start.offset < len) {
throw this._createError(unexpectedCharacterErrorMsg(this.peek), start);
}
}
private _attemptUntilChar(char: number) {
while (this.peek !== char) {
this._advance();
}
}
private _readChar(decodeEntities: boolean): string {
if (decodeEntities && this.peek === $AMPERSAND) {
var start = this._getLocation();
this._attemptUntilChar($SEMICOLON);
this._advance();
var entitySrc = this.input.substring(start.offset + 1, this.index - 1);
var decodedEntity = decodeEntity(entitySrc);
if (isPresent(decodedEntity)) {
return decodedEntity;
} else {
throw this._createError(unknownEntityErrorMsg(entitySrc), start);
}
} else {
var index = this.index;
this._advance();
return this.input[index];
}
}
private _consumeRawText(decodeEntities: boolean, firstCharOfEnd: number,
attemptEndRest: Function): HtmlToken {
var tagCloseStart;
var textStart = this._getLocation();
this._beginToken(decodeEntities ? HtmlTokenType.ESCAPABLE_RAW_TEXT : HtmlTokenType.RAW_TEXT,
textStart);
var parts = [];
while (true) {
tagCloseStart = this._getLocation();
if (this._attemptChar(firstCharOfEnd) && attemptEndRest()) {
break;
}
if (this.index > tagCloseStart.offset) {
parts.push(this.input.substring(tagCloseStart.offset, this.index));
}
while (this.peek !== firstCharOfEnd) {
parts.push(this._readChar(decodeEntities));
}
}
return this._endToken([parts.join('')], tagCloseStart);
}
private _consumeComment(start: ParseLocation) {
this._beginToken(HtmlTokenType.COMMENT_START, start);
this._requireChar($MINUS);
this._endToken([]);
var textToken = this._consumeRawText(false, $MINUS, () => this._attemptChars('->'));
this._beginToken(HtmlTokenType.COMMENT_END, textToken.sourceSpan.end);
this._endToken([]);
}
private _consumeCdata(start: ParseLocation) {
this._beginToken(HtmlTokenType.CDATA_START, start);
this._requireChars('cdata[');
this._endToken([]);
var textToken = this._consumeRawText(false, $RBRACKET, () => this._attemptChars(']>'));
this._beginToken(HtmlTokenType.CDATA_END, textToken.sourceSpan.end);
this._endToken([]);
}
private _consumeDocType(start: ParseLocation) {
this._beginToken(HtmlTokenType.DOC_TYPE, start);
this._attemptUntilChar($GT);
this._advance();
this._endToken([this.input.substring(start.offset + 2, this.index - 1)]);
}
private _consumePrefixAndName(): string[] {
var nameOrPrefixStart = this.index;
var prefix = null;
while (this.peek !== $COLON && !isPrefixEnd(this.peek)) {
this._advance();
}
var nameStart;
if (this.peek === $COLON) {
this._advance();
prefix = this.input.substring(nameOrPrefixStart, this.index - 1);
nameStart = this.index;
} else {
nameStart = nameOrPrefixStart;
}
this._requireUntilFn(isNameEnd, this.index === nameStart ? 1 : 0);
var name = this.input.substring(nameStart, this.index);
return [prefix, name];
}
private _consumeTagOpen(start: ParseLocation) {
this._attemptUntilFn(isNotWhitespace);
var nameStart = this.index;
this._consumeTagOpenStart(start);
var lowercaseTagName = this.inputLowercase.substring(nameStart, this.index);
this._attemptUntilFn(isNotWhitespace);
while (this.peek !== $SLASH && this.peek !== $GT) {
this._consumeAttributeName();
this._attemptUntilFn(isNotWhitespace);
if (this._attemptChar($EQ)) {
this._attemptUntilFn(isNotWhitespace);
this._consumeAttributeValue();
}
this._attemptUntilFn(isNotWhitespace);
}
this._consumeTagOpenEnd();
var contentTokenType = getHtmlTagDefinition(lowercaseTagName).contentType;
if (contentTokenType === HtmlTagContentType.RAW_TEXT) {
this._consumeRawTextWithTagClose(lowercaseTagName, false);
} else if (contentTokenType === HtmlTagContentType.ESCAPABLE_RAW_TEXT) {
this._consumeRawTextWithTagClose(lowercaseTagName, true);
}
}
private _consumeRawTextWithTagClose(lowercaseTagName: string, decodeEntities: boolean) {
var textToken = this._consumeRawText(decodeEntities, $LT, () => {
if (!this._attemptChar($SLASH)) return false;
this._attemptUntilFn(isNotWhitespace);
if (!this._attemptChars(lowercaseTagName)) return false;
this._attemptUntilFn(isNotWhitespace);
if (!this._attemptChar($GT)) return false;
return true;
});
this._beginToken(HtmlTokenType.TAG_CLOSE, textToken.sourceSpan.end);
this._endToken([null, lowercaseTagName]);
}
private _consumeTagOpenStart(start: ParseLocation) {
this._beginToken(HtmlTokenType.TAG_OPEN_START, start);
var parts = this._consumePrefixAndName();
this._endToken(parts);
}
private _consumeAttributeName() {
this._beginToken(HtmlTokenType.ATTR_NAME);
var prefixAndName = this._consumePrefixAndName();
this._endToken(prefixAndName);
}
private _consumeAttributeValue() {
this._beginToken(HtmlTokenType.ATTR_VALUE);
var value;
if (this.peek === $SQ || this.peek === $DQ) {
var quoteChar = this.peek;
this._advance();
var parts = [];
while (this.peek !== quoteChar) {
parts.push(this._readChar(true));
}
value = parts.join('');
this._advance();
} else {
var valueStart = this.index;
this._requireUntilFn(isNameEnd, 1);
value = this.input.substring(valueStart, this.index);
}
this._endToken([value]);
}
private _consumeTagOpenEnd() {
var tokenType =
this._attemptChar($SLASH) ? HtmlTokenType.TAG_OPEN_END_VOID : HtmlTokenType.TAG_OPEN_END;
this._beginToken(tokenType);
this._requireChar($GT);
this._endToken([]);
}
private _consumeTagClose(start: ParseLocation) {
this._beginToken(HtmlTokenType.TAG_CLOSE, start);
this._attemptUntilFn(isNotWhitespace);
var prefixAndName;
prefixAndName = this._consumePrefixAndName();
this._attemptUntilFn(isNotWhitespace);
this._requireChar($GT);
this._endToken(prefixAndName);
}
private _consumeText() {
var start = this._getLocation();
this._beginToken(HtmlTokenType.TEXT, start);
var parts = [this._readChar(true)];
while (!isTextEnd(this.peek)) {
parts.push(this._readChar(true));
}
this._endToken([parts.join('')]);
}
}
function isNotWhitespace(code: number): boolean {
return !isWhitespace(code) || code === $EOF;
}
function isWhitespace(code: number): boolean {
return (code >= $TAB && code <= $SPACE) || (code === $NBSP);
}
function isNameEnd(code: number): boolean {
return isWhitespace(code) || code === $GT || code === $SLASH || code === $SQ || code === $DQ ||
code === $EQ
}
function isPrefixEnd(code: number): boolean {
return (code < $a || $z < code) && (code < $A || $Z < code) && (code < $0 || code > $9);
}
function isTextEnd(code: number): boolean {
return code === $LT || code === $EOF;
}
function decodeEntity(entity: string): string {
var i = 0;
var isNumber = entity.length > i && entity[i] == '#';
if (isNumber) i++;
var isHex = entity.length > i && entity[i] == 'x';
if (isHex) i++;
var value = entity.substring(i);
var result = null;
if (isNumber) {
var charCode;
try {
charCode = NumberWrapper.parseInt(value, isHex ? 16 : 10);
} catch (e) {
return null;
}
result = StringWrapper.fromCharCode(charCode);
} else {
result = NAMED_ENTITIES[value];
}
if (isPresent(result)) {
return result;
} else {
return null;
}
}