xarxaprod-wp-theme/vendor/mck89/peast/lib/Peast/Syntax/JSX/Parser.php

439 lines
14 KiB
PHP

<?php
/**
* This file is part of the Peast package
*
* (c) Marco Marchiò <marco.mm89@gmail.com>
*
* For the full copyright and license information refer to the LICENSE file
* distributed with this source code
*/
namespace Peast\Syntax\JSX;
use Peast\Syntax\Token;
/**
* JSX parser trait
*
* @author Marco Marchiò <marco.mm89@gmail.com>
*/
trait Parser
{
/**
* Creates a JSX node
*
* @param string $nodeType Node's type
* @param mixed $position Node's start position
*
* @return \Peast\Syntax\Node\Node
*/
protected function createJSXNode($nodeType, $position)
{
return $this->createNode("JSX\\$nodeType", $position);
}
/**
* Parses a jsx fragment
*
* @return \Peast\Syntax\Node\JSX\JSXFragment|null
*/
protected function parseJSXFragment()
{
$startOpeningToken = $this->scanner->getToken();
if (!$startOpeningToken || $startOpeningToken->value !== "<") {
return null;
}
$endOpeningToken = $this->scanner->getNextToken();
if (!$endOpeningToken || $endOpeningToken->value !== ">") {
return null;
}
$this->scanner->consumeToken();
$this->scanner->consumeToken();
$children = $this->parseJSXChildren();
if (!($startClosingToken = $this->scanner->consume("<")) ||
!$this->scanner->consume("/") ||
!$this->scanner->reconsumeCurrentTokenInJSXMode() ||
$endOpeningToken->value !== ">") {
$this->error();
}
$this->scanner->consumeToken();
//Opening tag
$openingNode = $this->createJSXNode(
"JSXOpeningFragment",
$startOpeningToken
);
$this->completeNode(
$openingNode,
$endOpeningToken->location->end
);
//Closing tag
$closingNode = $this->createJSXNode(
"JSXClosingFragment",
$startClosingToken
);
$this->completeNode($closingNode);
//Fragment
$node = $this->createJSXNode("JSXFragment", $startOpeningToken);
$node->setOpeningFragment($openingNode);
$node->setClosingFragment($closingNode);
if ($children) {
$node->setChildren($children);
}
return $this->completeNode($node);
}
/**
* Parses a group of jsx children
*
* @return \Peast\Syntax\Node\Node[]|null
*/
protected function parseJSXChildren()
{
$children = array();
while ($child = $this->parseJSXChild()) {
$children[] = $child;
}
return count($children) ? $children : null;
}
/**
* Parses a jsx child
*
* @return \Peast\Syntax\Node\Node|null
*/
protected function parseJSXChild()
{
if ($node = $this->parseJSXText()) {
return $node;
} elseif ($node = $this->parseJSXFragment()) {
return $node;
} elseif($node = $this->parseJSXElement()) {
return $node;
} elseif ($startToken = $this->scanner->consume("{")) {
$spread = $this->scanner->consume("...");
$exp = $this->parseAssignmentExpression();
$midPos = $this->scanner->getPosition();
if (($spread && !$exp) || !$this->scanner->consume("}")) {
$this->error();
}
$node = $this->createJSXNode(
$spread ? "JSXSpreadChild" : "JSXExpressionContainer",
$startToken
);
if (!$exp) {
$exp = $this->createJSXNode("JSXEmptyExpression", $midPos);
$this->completeNode($exp, $midPos);
}
$node->setExpression($exp);
return $this->completeNode($node);
}
return null;
}
/**
* Parses a jsx text
*
* @return \Peast\Syntax\Node\JSX\JSXText|null
*/
protected function parseJSXText()
{
if (!($token = $this->scanner->reconsumeCurrentTokenAsJSXText())) {
return null;
}
$this->scanner->consumeToken();
$node = $this->createJSXNode("JSXText", $token);
$node->setRaw($token->value);
return $this->completeNode($node, $token->location->end);
}
/**
* Parses a jsx element
*
* @return \Peast\Syntax\Node\JSX\JSXElement|null
*/
protected function parseJSXElement()
{
$startOpeningToken = $this->scanner->getToken();
if (!$startOpeningToken || $startOpeningToken->value !== "<") {
return null;
}
$nextToken = $this->scanner->getNextToken();
if ($nextToken && $nextToken->value === "/") {
return null;
}
$this->scanner->consumeToken();
if (!($name = $this->parseJSXIdentifierOrMemberExpression())) {
$this->error();
}
$attributes = $this->parseJSXAttributes();
$selfClosing = $this->scanner->consume("/");
$endOpeningToken = $this->scanner->reconsumeCurrentTokenInJSXMode();
if (!$endOpeningToken || $endOpeningToken->value !== ">") {
$this->error();
}
$this->scanner->consumeToken();
if (!$selfClosing) {
$children = $this->parseJSXChildren();
if (
($startClosingToken = $this->scanner->consume("<")) &&
$this->scanner->consume("/") &&
($closingName = $this->parseJSXIdentifierOrMemberExpression()) &&
($endClosingToken = $this->scanner->reconsumeCurrentTokenInJSXMode()) &&
($endClosingToken->value === ">")
) {
$this->scanner->consumeToken();
if (!$this->isSameJSXElementName($name, $closingName)) {
$this->error("Closing tag does not match opening tag");
}
} else {
$this->error();
}
}
//Opening tag
$openingNode = $this->createJSXNode(
"JSXOpeningElement",
$startOpeningToken
);
$openingNode->setName($name);
$openingNode->setSelfClosing($selfClosing);
if ($attributes) {
$openingNode->setAttributes($attributes);
}
$this->completeNode(
$openingNode,
$endOpeningToken->location->end
);
//Closing tag
$closingNode = null;
if (!$selfClosing) {
$closingNode = $this->createJSXNode(
"JSXClosingElement",
$startClosingToken
);
$closingNode->setName($closingName);
$this->completeNode($closingNode);
}
//Element
$node = $this->createJSXNode("JSXElement", $startOpeningToken);
$node->setOpeningElement($openingNode);
if ($closingNode) {
$node->setClosingElement($closingNode);
if ($children) {
$node->setChildren($children);
}
}
return $this->completeNode($node);
}
/**
* Parses a jsx identifier, namespaced identifier or member expression
*
* @param bool $allowMember True to allow member expressions
*
* @return \Peast\Syntax\Node\Node|null
*/
protected function parseJSXIdentifierOrMemberExpression($allowMember = true)
{
$idToken = $this->scanner->reconsumeCurrentTokenInJSXMode();
if (!$idToken || $idToken->type !== Token::TYPE_JSX_IDENTIFIER) {
return null;
}
$this->scanner->consumeToken();
$idNode = $this->createJSXNode("JSXIdentifier", $idToken);
$idNode->setName($idToken->value);
$idNode = $this->completeNode($idNode);
//Namespaced identifier
if ($this->scanner->consume(":")) {
$idToken2 = $this->scanner->reconsumeCurrentTokenInJSXMode();
if (!$idToken2 || $idToken2->type !== Token::TYPE_JSX_IDENTIFIER) {
$this->error();
}
$this->scanner->consumeToken();
$idNode2 = $this->createJSXNode("JSXIdentifier", $idToken2);
$idNode2->setName($idToken2->value);
$idNode2 = $this->completeNode($idNode2);
$node = $this->createJSXNode("JSXNamespacedName", $idToken);
$node->setNamespace($idNode);
$node->setName($idNode2);
return $this->completeNode($node);
}
//Get following identifiers
$nextIds = array();
if ($allowMember) {
while ($this->scanner->consume(".")) {
$nextId = $this->scanner->reconsumeCurrentTokenInJSXMode();
if (!$nextId || $nextId->type !== Token::TYPE_JSX_IDENTIFIER) {
$this->error();
}
$this->scanner->consumeToken();
$nextIds[] = $nextId;
}
}
//Create the member expression if required
$objectNode = $idNode;
foreach ($nextIds as $nid) {
$propEnd = $nid->location->end;
$propNode = $this->createJSXNode("JSXIdentifier", $nid);
$propNode->setName($nid->value);
$propNode = $this->completeNode($propNode, $propEnd);
$node = $this->createJSXNode("JSXMemberExpression", $objectNode);
$node->setObject($objectNode);
$node->setProperty($propNode);
$objectNode = $this->completeNode($node, $propEnd);
}
return $objectNode;
}
/**
* Parses a jsx attributes list
*
* @return \Peast\Syntax\Node\Node[]|null
*/
protected function parseJSXAttributes()
{
$attributes = array();
while (
($attr = $this->parseJSXSpreadAttribute()) ||
($attr = $this->parseJSXAttribute())
) {
$attributes[] = $attr;
}
return count($attributes) ? $attributes : null;
}
/**
* Parses a jsx spread attribute
*
* @return \Peast\Syntax\Node\JSX\JSXSpreadAttribute|null
*/
protected function parseJSXSpreadAttribute()
{
if (!($openToken = $this->scanner->consume("{"))) {
return null;
}
if (
$this->scanner->consume("...") &&
($exp = $this->parseAssignmentExpression()) &&
$this->scanner->consume("}")
) {
$node = $this->createJSXNode("JSXSpreadAttribute", $openToken);
$node->setArgument($exp);
return $this->completeNode($node);
}
$this->error();
}
/**
* Parses a jsx spread attribute
*
* @return \Peast\Syntax\Node\JSX\JSXSpreadAttribute|null
*/
protected function parseJSXAttribute()
{
if (!($name = $this->parseJSXIdentifierOrMemberExpression(false))) {
return null;
}
$value = null;
if ($this->scanner->consume("=")) {
$strToken = $this->scanner->reconsumeCurrentTokenInJSXMode();
if ($strToken && $strToken->type === Token::TYPE_STRING_LITERAL) {
$this->scanner->consumeToken();
$value = $this->createNode("StringLiteral", $strToken);
$value->setRaw($strToken->value);
$value = $this->completeNode($value);
} elseif ($startExp = $this->scanner->consume("{")) {
if (
($exp = $this->parseAssignmentExpression()) &&
$this->scanner->consume("}")
) {
$value = $this->createJSXNode(
"JSXExpressionContainer",
$startExp
);
$value->setExpression($exp);
$value = $this->completeNode($value);
} else {
$this->error();
}
} elseif (
!($value = $this->parseJSXFragment()) &&
!($value = $this->parseJSXElement())
) {
$this->error();
}
}
$node = $this->createJSXNode("JSXAttribute", $name);
$node->setName($name);
if ($value) {
$node->setValue($value);
}
return $this->completeNode($node);
}
/**
* Checks that 2 tag names are equal
*
* @param \Peast\Syntax\Node\Node $n1 First name
* @param \Peast\Syntax\Node\Node $n2 Second name
*
* @return bool
*/
protected function isSameJSXElementName($n1, $n2)
{
$type = $n1->getType();
if ($type !== $n2->getType()) {
return false;
} elseif ($type === "JSXNamespacedName") {
return $this->isSameJSXElementName(
$n1->getNamespace(), $n2->getNamespace()
) && $this->isSameJSXElementName(
$n1->getName(), $n2->getName()
);
} elseif ($type === "JSXMemberExpression") {
return $this->isSameJSXElementName(
$n1->getObject(), $n2->getObject()
) && $this->isSameJSXElementName(
$n1->getProperty(), $n2->getProperty()
);
}
return $type === "JSXIdentifier" && $n1->getName() === $n2->getName();
}
}