450 lines
13 KiB
JavaScript
450 lines
13 KiB
JavaScript
import XHTMLEntities from "./xhtml";
|
|
import { TokenType, types as tt } from "../../tokenizer/types";
|
|
import { TokContext, types as tc } from "../../tokenizer/context";
|
|
import Parser from "../../parser";
|
|
import { isIdentifierChar, isIdentifierStart } from "../../util/identifier";
|
|
import { isNewLine } from "../../util/whitespace";
|
|
|
|
const HEX_NUMBER = /^[\da-fA-F]+$/;
|
|
const DECIMAL_NUMBER = /^\d+$/;
|
|
|
|
tc.j_oTag = new TokContext("<tag", false);
|
|
tc.j_cTag = new TokContext("</tag", false);
|
|
tc.j_expr = new TokContext("<tag>...</tag>", true, true);
|
|
|
|
tt.jsxName = new TokenType("jsxName");
|
|
tt.jsxText = new TokenType("jsxText", { beforeExpr: true });
|
|
tt.jsxTagStart = new TokenType("jsxTagStart");
|
|
tt.jsxTagEnd = new TokenType("jsxTagEnd");
|
|
|
|
tt.jsxTagStart.updateContext = function() {
|
|
this.state.context.push(tc.j_expr); // treat as beginning of JSX expression
|
|
this.state.context.push(tc.j_oTag); // start opening tag context
|
|
this.state.exprAllowed = false;
|
|
};
|
|
|
|
tt.jsxTagEnd.updateContext = function(prevType) {
|
|
var out = this.state.context.pop();
|
|
if (out === tc.j_oTag && prevType === tt.slash || out === tc.j_cTag) {
|
|
this.state.context.pop();
|
|
this.state.exprAllowed = this.curContext() === tc.j_expr;
|
|
} else {
|
|
this.state.exprAllowed = true;
|
|
}
|
|
};
|
|
|
|
var pp = Parser.prototype;
|
|
|
|
// Reads inline JSX contents token.
|
|
|
|
pp.jsxReadToken = function() {
|
|
var out = "", chunkStart = this.state.pos;
|
|
for (;;) {
|
|
if (this.state.pos >= this.input.length) {
|
|
this.raise(this.state.start, "Unterminated JSX contents");
|
|
}
|
|
|
|
var ch = this.input.charCodeAt(this.state.pos);
|
|
|
|
switch (ch) {
|
|
case 60: // "<"
|
|
case 123: // "{"
|
|
if (this.state.pos === this.state.start) {
|
|
if (ch === 60 && this.state.exprAllowed) {
|
|
++this.state.pos;
|
|
return this.finishToken(tt.jsxTagStart);
|
|
}
|
|
return this.getTokenFromCode(ch);
|
|
}
|
|
out += this.input.slice(chunkStart, this.state.pos);
|
|
return this.finishToken(tt.jsxText, out);
|
|
|
|
case 38: // "&"
|
|
out += this.input.slice(chunkStart, this.state.pos);
|
|
out += this.jsxReadEntity();
|
|
chunkStart = this.state.pos;
|
|
break;
|
|
|
|
default:
|
|
if (isNewLine(ch)) {
|
|
out += this.input.slice(chunkStart, this.state.pos);
|
|
out += this.jsxReadNewLine(true);
|
|
chunkStart = this.state.pos;
|
|
} else {
|
|
++this.state.pos;
|
|
}
|
|
}
|
|
}
|
|
};
|
|
|
|
pp.jsxReadNewLine = function(normalizeCRLF) {
|
|
var ch = this.input.charCodeAt(this.state.pos);
|
|
var out;
|
|
++this.state.pos;
|
|
if (ch === 13 && this.input.charCodeAt(this.state.pos) === 10) {
|
|
++this.state.pos;
|
|
out = normalizeCRLF ? "\n" : "\r\n";
|
|
} else {
|
|
out = String.fromCharCode(ch);
|
|
}
|
|
++this.state.curLine;
|
|
this.state.lineStart = this.state.pos;
|
|
|
|
return out;
|
|
};
|
|
|
|
pp.jsxReadString = function(quote) {
|
|
var out = "", chunkStart = ++this.state.pos;
|
|
for (;;) {
|
|
if (this.state.pos >= this.input.length) {
|
|
this.raise(this.state.start, "Unterminated string constant");
|
|
}
|
|
|
|
var ch = this.input.charCodeAt(this.state.pos);
|
|
if (ch === quote) break;
|
|
if (ch === 38) { // "&"
|
|
out += this.input.slice(chunkStart, this.state.pos);
|
|
out += this.jsxReadEntity();
|
|
chunkStart = this.state.pos;
|
|
} else if (isNewLine(ch)) {
|
|
out += this.input.slice(chunkStart, this.state.pos);
|
|
out += this.jsxReadNewLine(false);
|
|
chunkStart = this.state.pos;
|
|
} else {
|
|
++this.state.pos;
|
|
}
|
|
}
|
|
out += this.input.slice(chunkStart, this.state.pos++);
|
|
return this.finishToken(tt.string, out);
|
|
};
|
|
|
|
pp.jsxReadEntity = function() {
|
|
var str = "", count = 0, entity;
|
|
var ch = this.input[this.state.pos];
|
|
|
|
var startPos = ++this.state.pos;
|
|
while (this.state.pos < this.input.length && count++ < 10) {
|
|
ch = this.input[this.state.pos++];
|
|
if (ch === ";") {
|
|
if (str[0] === "#") {
|
|
if (str[1] === "x") {
|
|
str = str.substr(2);
|
|
if (HEX_NUMBER.test(str))
|
|
entity = String.fromCharCode(parseInt(str, 16));
|
|
} else {
|
|
str = str.substr(1);
|
|
if (DECIMAL_NUMBER.test(str))
|
|
entity = String.fromCharCode(parseInt(str, 10));
|
|
}
|
|
} else {
|
|
entity = XHTMLEntities[str];
|
|
}
|
|
break;
|
|
}
|
|
str += ch;
|
|
}
|
|
if (!entity) {
|
|
this.state.pos = startPos;
|
|
return "&";
|
|
}
|
|
return entity;
|
|
};
|
|
|
|
|
|
// Read a JSX identifier (valid tag or attribute name).
|
|
//
|
|
// Optimized version since JSX identifiers can"t contain
|
|
// escape characters and so can be read as single slice.
|
|
// Also assumes that first character was already checked
|
|
// by isIdentifierStart in readToken.
|
|
|
|
pp.jsxReadWord = function() {
|
|
var ch, start = this.state.pos;
|
|
do {
|
|
ch = this.input.charCodeAt(++this.state.pos);
|
|
} while (isIdentifierChar(ch) || ch === 45); // "-"
|
|
return this.finishToken(tt.jsxName, this.input.slice(start, this.state.pos));
|
|
};
|
|
|
|
// Transforms JSX element name to string.
|
|
|
|
function getQualifiedJSXName(object) {
|
|
if (object.type === "JSXIdentifier") {
|
|
return object.name;
|
|
}
|
|
|
|
if (object.type === "JSXNamespacedName") {
|
|
return object.namespace.name + ":" + object.name.name;
|
|
}
|
|
|
|
if (object.type === "JSXMemberExpression") {
|
|
return getQualifiedJSXName(object.object) + "." + getQualifiedJSXName(object.property);
|
|
}
|
|
}
|
|
|
|
// Parse next token as JSX identifier
|
|
|
|
pp.jsxParseIdentifier = function() {
|
|
var node = this.startNode();
|
|
if (this.match(tt.jsxName)) {
|
|
node.name = this.state.value;
|
|
} else if (this.state.type.keyword) {
|
|
node.name = this.state.type.keyword;
|
|
} else {
|
|
this.unexpected();
|
|
}
|
|
this.next();
|
|
return this.finishNode(node, "JSXIdentifier");
|
|
};
|
|
|
|
// Parse namespaced identifier.
|
|
|
|
pp.jsxParseNamespacedName = function() {
|
|
var startPos = this.state.start, startLoc = this.state.startLoc;
|
|
var name = this.jsxParseIdentifier();
|
|
if (!this.eat(tt.colon)) return name;
|
|
|
|
var node = this.startNodeAt(startPos, startLoc);
|
|
node.namespace = name;
|
|
node.name = this.jsxParseIdentifier();
|
|
return this.finishNode(node, "JSXNamespacedName");
|
|
};
|
|
|
|
// Parses element name in any form - namespaced, member
|
|
// or single identifier.
|
|
|
|
pp.jsxParseElementName = function() {
|
|
var startPos = this.state.start, startLoc = this.state.startLoc;
|
|
var node = this.jsxParseNamespacedName();
|
|
while (this.eat(tt.dot)) {
|
|
var newNode = this.startNodeAt(startPos, startLoc);
|
|
newNode.object = node;
|
|
newNode.property = this.jsxParseIdentifier();
|
|
node = this.finishNode(newNode, "JSXMemberExpression");
|
|
}
|
|
return node;
|
|
};
|
|
|
|
// Parses any type of JSX attribute value.
|
|
|
|
pp.jsxParseAttributeValue = function() {
|
|
switch (this.state.type) {
|
|
case tt.braceL:
|
|
let node = this.jsxParseExpressionContainer();
|
|
if (node.expression.type === "JSXEmptyExpression") {
|
|
this.raise(node.start, "JSX attributes must only be assigned a non-empty expression");
|
|
} else {
|
|
return node;
|
|
}
|
|
|
|
case tt.jsxTagStart:
|
|
case tt.string:
|
|
let node = this.parseExprAtom();
|
|
node.rawValue = null;
|
|
return node;
|
|
|
|
default:
|
|
this.raise(this.state.start, "JSX value should be either an expression or a quoted JSX text");
|
|
}
|
|
};
|
|
|
|
// JSXEmptyExpression is unique type since it doesn"t actually parse anything,
|
|
// and so it should start at the end of last read token (left brace) and finish
|
|
// at the beginning of the next one (right brace).
|
|
|
|
pp.jsxParseEmptyExpression = function() {
|
|
var tmp = this.state.start;
|
|
this.state.start = this.state.lastTokEnd;
|
|
this.state.lastTokEnd = tmp;
|
|
|
|
tmp = this.state.startLoc;
|
|
this.state.startLoc = this.state.lastTokEndLoc;
|
|
this.state.lastTokEndLoc = tmp;
|
|
|
|
return this.finishNode(this.startNode(), "JSXEmptyExpression");
|
|
};
|
|
|
|
// Parses JSX expression enclosed into curly brackets.
|
|
|
|
|
|
pp.jsxParseExpressionContainer = function() {
|
|
var node = this.startNode();
|
|
this.next();
|
|
if (this.match(tt.braceR)) {
|
|
node.expression = this.jsxParseEmptyExpression();
|
|
} else {
|
|
node.expression = this.parseExpression();
|
|
}
|
|
this.expect(tt.braceR);
|
|
return this.finishNode(node, "JSXExpressionContainer");
|
|
};
|
|
|
|
// Parses following JSX attribute name-value pair.
|
|
|
|
pp.jsxParseAttribute = function() {
|
|
var node = this.startNode();
|
|
if (this.eat(tt.braceL)) {
|
|
this.expect(tt.ellipsis);
|
|
node.argument = this.parseMaybeAssign();
|
|
this.expect(tt.braceR);
|
|
return this.finishNode(node, "JSXSpreadAttribute");
|
|
}
|
|
node.name = this.jsxParseNamespacedName();
|
|
node.value = this.eat(tt.eq) ? this.jsxParseAttributeValue() : null;
|
|
return this.finishNode(node, "JSXAttribute");
|
|
};
|
|
|
|
// Parses JSX opening tag starting after "<".
|
|
|
|
pp.jsxParseOpeningElementAt = function(startPos, startLoc) {
|
|
var node = this.startNodeAt(startPos, startLoc);
|
|
node.attributes = [];
|
|
node.name = this.jsxParseElementName();
|
|
while (!this.match(tt.slash) && !this.match(tt.jsxTagEnd)) {
|
|
node.attributes.push(this.jsxParseAttribute());
|
|
}
|
|
node.selfClosing = this.eat(tt.slash);
|
|
this.expect(tt.jsxTagEnd);
|
|
return this.finishNode(node, "JSXOpeningElement");
|
|
};
|
|
|
|
// Parses JSX closing tag starting after "</".
|
|
|
|
pp.jsxParseClosingElementAt = function(startPos, startLoc) {
|
|
var node = this.startNodeAt(startPos, startLoc);
|
|
node.name = this.jsxParseElementName();
|
|
this.expect(tt.jsxTagEnd);
|
|
return this.finishNode(node, "JSXClosingElement");
|
|
};
|
|
|
|
// Parses entire JSX element, including it"s opening tag
|
|
// (starting after "<"), attributes, contents and closing tag.
|
|
|
|
pp.jsxParseElementAt = function(startPos, startLoc) {
|
|
var node = this.startNodeAt(startPos, startLoc);
|
|
var children = [];
|
|
var openingElement = this.jsxParseOpeningElementAt(startPos, startLoc);
|
|
var closingElement = null;
|
|
|
|
if (!openingElement.selfClosing) {
|
|
contents: for (;;) {
|
|
switch (this.state.type) {
|
|
case tt.jsxTagStart:
|
|
startPos = this.state.start; startLoc = this.state.startLoc;
|
|
this.next();
|
|
if (this.eat(tt.slash)) {
|
|
closingElement = this.jsxParseClosingElementAt(startPos, startLoc);
|
|
break contents;
|
|
}
|
|
children.push(this.jsxParseElementAt(startPos, startLoc));
|
|
break;
|
|
|
|
case tt.jsxText:
|
|
children.push(this.parseExprAtom());
|
|
break;
|
|
|
|
case tt.braceL:
|
|
children.push(this.jsxParseExpressionContainer());
|
|
break;
|
|
|
|
default:
|
|
this.unexpected();
|
|
}
|
|
}
|
|
|
|
if (getQualifiedJSXName(closingElement.name) !== getQualifiedJSXName(openingElement.name)) {
|
|
this.raise(
|
|
closingElement.start,
|
|
"Expected corresponding JSX closing tag for <" + getQualifiedJSXName(openingElement.name) + ">"
|
|
);
|
|
}
|
|
}
|
|
|
|
node.openingElement = openingElement;
|
|
node.closingElement = closingElement;
|
|
node.children = children;
|
|
if (this.match(tt.relational) && this.state.value === "<") {
|
|
this.raise(this.state.start, "Adjacent JSX elements must be wrapped in an enclosing tag");
|
|
}
|
|
return this.finishNode(node, "JSXElement");
|
|
};
|
|
|
|
// Parses entire JSX element from current position.
|
|
|
|
pp.jsxParseElement = function() {
|
|
var startPos = this.state.start, startLoc = this.state.startLoc;
|
|
this.next();
|
|
return this.jsxParseElementAt(startPos, startLoc);
|
|
};
|
|
|
|
export default function(instance) {
|
|
instance.extend("parseExprAtom", function(inner) {
|
|
return function(refShortHandDefaultPos) {
|
|
if (this.match(tt.jsxText)) {
|
|
var node = this.parseLiteral(this.state.value);
|
|
// https://github.com/babel/babel/issues/2078
|
|
node.rawValue = null;
|
|
return node;
|
|
} else if (this.match(tt.jsxTagStart)) {
|
|
return this.jsxParseElement();
|
|
} else {
|
|
return inner.call(this, refShortHandDefaultPos);
|
|
}
|
|
};
|
|
});
|
|
|
|
instance.extend("readToken", function(inner) {
|
|
return function(code) {
|
|
var context = this.curContext();
|
|
|
|
if (context === tc.j_expr) {
|
|
return this.jsxReadToken();
|
|
}
|
|
|
|
if (context === tc.j_oTag || context === tc.j_cTag) {
|
|
if (isIdentifierStart(code)) {
|
|
return this.jsxReadWord();
|
|
}
|
|
|
|
if (code === 62) {
|
|
++this.state.pos;
|
|
return this.finishToken(tt.jsxTagEnd);
|
|
}
|
|
|
|
if ((code === 34 || code === 39) && context === tc.j_oTag) {
|
|
return this.jsxReadString(code);
|
|
}
|
|
}
|
|
|
|
if (code === 60 && this.state.exprAllowed) {
|
|
++this.state.pos;
|
|
return this.finishToken(tt.jsxTagStart);
|
|
}
|
|
|
|
return inner.call(this, code);
|
|
};
|
|
});
|
|
|
|
instance.extend("updateContext", function(inner) {
|
|
return function(prevType) {
|
|
if (this.match(tt.braceL)) {
|
|
var curContext = this.curContext();
|
|
if (curContext === tc.j_oTag) {
|
|
this.state.context.push(tc.b_expr);
|
|
} else if (curContext === tc.j_expr) {
|
|
this.state.context.push(tc.b_tmpl);
|
|
} else {
|
|
inner.call(this, prevType);
|
|
}
|
|
this.state.exprAllowed = true;
|
|
} else if (this.match(tt.slash) && prevType === tt.jsxTagStart) {
|
|
this.state.context.length -= 2; // do not consider JSX expr -> JSX open tag -> ... anymore
|
|
this.state.context.push(tc.j_cTag); // reconsider as closing tag context
|
|
this.state.exprAllowed = false;
|
|
} else {
|
|
return inner.call(this, prevType);
|
|
}
|
|
};
|
|
});
|
|
}
|