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