124 lines
3.4 KiB
PHP
124 lines
3.4 KiB
PHP
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<?php
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/**
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* This file is part of the Peast package
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*
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* (c) Marco Marchiò <marco.mm89@gmail.com>
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*
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* For the full copyright and license information refer to the LICENSE file
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* distributed with this source code
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*/
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namespace Peast\Syntax\JSX;
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use Peast\Syntax\Token;
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/**
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* JSX scanner trait
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*
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* @author Marco Marchiò <marco.mm89@gmail.com>
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*/
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trait Scanner
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{
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/**
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* Tries to reconsume the current token as a jsx text if possible
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*
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* @return Token|null
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*/
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public function reconsumeCurrentTokenAsJSXText()
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{
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//Current and next tokens must be reset and the open brackets count must be correct
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//like they were never scanned
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foreach (array($this->currentToken, $this->nextToken) as $token) {
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if ($token && isset($this->brackets[$token->value])) {
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if ($refBracket = $this->brackets[$token->value]) {
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$this->openBrackets[$refBracket]++;
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} else {
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$this->openBrackets[$token->value]--;
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}
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}
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}
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$this->nextToken = null;
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$this->currentToken = null;
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$startPosition = $this->getPosition();
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$this->setScanPosition($startPosition);
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$result = $this->consumeUntil(array("{", "<"), false, false);
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if ($result) {
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$this->currentToken = new Token(Token::TYPE_JSX_TEXT, $result[0]);
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$this->currentToken->location->start = $startPosition;
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$this->currentToken->location->end = $this->getPosition(true);
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}
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return $this->currentToken;
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}
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/**
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* Reconsumes the current token in jsx mode
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*
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* @return Token|null
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*/
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public function reconsumeCurrentTokenInJSXMode()
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{
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$this->jsx = true;
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$this->nextToken = null;
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$this->currentToken = null;
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$startPosition = $this->getPosition();
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$this->setScanPosition($startPosition);
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$token = $this->getToken();
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$this->jsx = false;
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return $token;
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}
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/**
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* String scanning method in jsx mode
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*
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* @return Token|null
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*/
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public function scanJSXString()
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{
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return $this->scanString(false);
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}
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/**
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* String punctuator method in jsx mode
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*
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* @return Token|null
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*/
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public function scanJSXPunctuator()
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{
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//The ">" character in jsx mode must be emitted in its own token
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//without matching longer sequences like ">>"
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$char = $this->charAt();
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if ($char === ">") {
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$this->index++;
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$this->column++;
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return new Token(Token::TYPE_PUNCTUATOR, $char);
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}
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return $this->scanPunctuator();
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}
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/**
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* Identifier scanning method in jsx mode
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*
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* @return Token|null
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*/
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public function scanJSXIdentifier()
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{
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$buffer = "";
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$char = $this->charAt();
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if ($char !== null && $this->isIdentifierChar($char)) {
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do {
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$buffer .= $char;
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$this->index++;
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$this->column++;
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$char = $this->charAt();
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} while (
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$char !== null &&
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($this->isIdentifierChar($char, false) || $char === "-")
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);
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}
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return $buffer === "" ? null : new Token(Token::TYPE_JSX_IDENTIFIER, $buffer);
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}
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}
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