Block.js•2.29 kB
import {
WhiteSpace,
Comment,
Semicolon,
AtKeyword,
LeftCurlyBracket,
RightCurlyBracket
} from '../../tokenizer/index.js';
const AMPERSAND = 0x0026; // U+0026 AMPERSAND (&)
function consumeRaw(startToken) {
return this.Raw(startToken, null, true);
}
function consumeRule() {
return this.parseWithFallback(this.Rule, consumeRaw);
}
function consumeRawDeclaration(startToken) {
return this.Raw(startToken, this.consumeUntilSemicolonIncluded, true);
}
function consumeDeclaration() {
if (this.tokenType === Semicolon) {
return consumeRawDeclaration.call(this, this.tokenIndex);
}
const node = this.parseWithFallback(this.Declaration, consumeRawDeclaration);
if (this.tokenType === Semicolon) {
this.next();
}
return node;
}
export const name = 'Block';
export const walkContext = 'block';
export const structure = {
children: [[
'Atrule',
'Rule',
'Declaration'
]]
};
export function parse(isStyleBlock) {
const consumer = isStyleBlock ? consumeDeclaration : consumeRule;
const start = this.tokenStart;
let children = this.createList();
this.eat(LeftCurlyBracket);
scan:
while (!this.eof) {
switch (this.tokenType) {
case RightCurlyBracket:
break scan;
case WhiteSpace:
case Comment:
this.next();
break;
case AtKeyword:
children.push(this.parseWithFallback(this.Atrule.bind(this, isStyleBlock), consumeRaw));
break;
default:
if (isStyleBlock && this.isDelim(AMPERSAND)) {
children.push(consumeRule.call(this));
} else {
children.push(consumer.call(this));
}
}
}
if (!this.eof) {
this.eat(RightCurlyBracket);
}
return {
type: 'Block',
loc: this.getLocation(start, this.tokenStart),
children
};
}
export function generate(node) {
this.token(LeftCurlyBracket, '{');
this.children(node, prev => {
if (prev.type === 'Declaration') {
this.token(Semicolon, ';');
}
});
this.token(RightCurlyBracket, '}');
}