Press n or j to go to the next uncovered block, b, p or k for the previous block.
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2x 36x 36x 36x 36x 36x 36x 150x 150x 150x 150x 36x 34x 34x 36x 36x 150x 114x 114x 114x 114x 114x 2x 2x 2x 2x 2x 3147x 3147x 3147x 3147x 3147x 3147x 3147x 3147x 3147x 3147x 12458x 12458x 7x 7x 12458x 7x 12451x 12444x 12444x 12444x 9297x 12444x 3147x 3147x 9311x 9311x 9311x 3147x 3147x 2x 2x 3145x 3145x 3145x 2x 2x 12405x 12405x 12405x 166x 164x 164x 164x 166x 166x 2x 2x 2x 166x 166x 166x 12405x | /** @import { AST, Css, Directive } from '#compiler' */
/** @import { Parser } from '../index.js' */
import * as e from '../../../errors.js';
const REGEX_MATCHER = /^[~^$*|]?=/;
const REGEX_CLOSING_BRACKET = /[\s\]]/;
const REGEX_ATTRIBUTE_FLAGS = /^[a-zA-Z]+/; // only `i` and `s` are valid today, but make it future-proof
const REGEX_COMBINATOR = /^(\+|~|>|\|\|)/;
const REGEX_PERCENTAGE = /^\d+(\.\d+)?%/;
const REGEX_NTH_OF =
/^(even|odd|\+?(\d+|\d*n(\s*[+-]\s*\d+)?)|-\d*n(\s*\+\s*\d+))((?=\s*[,)])|\s+of\s+)/;
const REGEX_WHITESPACE_OR_COLON = /[\s:]/;
const REGEX_LEADING_HYPHEN_OR_DIGIT = /-?\d/;
const REGEX_VALID_IDENTIFIER_CHAR = /[a-zA-Z0-9_-]/;
const REGEX_COMMENT_CLOSE = /\*\//;
const REGEX_HTML_COMMENT_CLOSE = /-->/;
/**
* @param {Parser} parser
* @param {number} start
* @param {Array<AST.Attribute | AST.SpreadAttribute | Directive>} attributes
* @returns {Css.StyleSheet}
*/
export default function read_style(parser, start, attributes) {
const content_start = parser.index;
const children = read_body(parser, '</style');
const content_end = parser.index;
parser.read(/^<\/style\s*>/);
return {
type: 'StyleSheet',
start,
end: parser.index,
attributes,
children,
content: {
start: content_start,
end: content_end,
styles: parser.template.slice(content_start, content_end),
comment: null
}
};
}
/**
* @param {Parser} parser
* @param {string} close
* @returns {any[]}
*/
function read_body(parser, close) {
/** @type {Array<Css.Rule | Css.Atrule>} */
const children = [];
while (parser.index < parser.template.length) {
allow_comment_or_whitespace(parser);
if (parser.match(close)) {
return children;
}
if (parser.match('@')) {
children.push(read_at_rule(parser));
} else {
children.push(read_rule(parser));
}
}
e.expected_token(parser.template.length, close);
}
/**
* @param {Parser} parser
* @returns {Css.Atrule}
*/
function read_at_rule(parser) {
const start = parser.index;
parser.eat('@', true);
const name = read_identifier(parser);
const prelude = read_value(parser);
/** @type {Css.Block | null} */
let block = null;
if (parser.match('{')) {
// e.g. `@media (...) {...}`
block = read_block(parser);
} else {
// e.g. `@import '...'`
parser.eat(';', true);
}
return {
type: 'Atrule',
start,
end: parser.index,
name,
prelude,
block
};
}
/**
* @param {Parser} parser
* @returns {Css.Rule}
*/
function read_rule(parser) {
const start = parser.index;
return {
type: 'Rule',
prelude: read_selector_list(parser),
block: read_block(parser),
start,
end: parser.index,
metadata: {
parent_rule: null,
has_local_selectors: false,
is_global_block: false
}
};
}
/**
* @param {Parser} parser
* @param {boolean} [inside_pseudo_class]
* @returns {Css.SelectorList}
*/
function read_selector_list(parser, inside_pseudo_class = false) {
/** @type {Css.ComplexSelector[]} */
const children = [];
allow_comment_or_whitespace(parser);
const start = parser.index;
while (parser.index < parser.template.length) {
children.push(read_selector(parser, inside_pseudo_class));
const end = parser.index;
allow_comment_or_whitespace(parser);
if (inside_pseudo_class ? parser.match(')') : parser.match('{')) {
return {
type: 'SelectorList',
start,
end,
children
};
} else {
parser.eat(',', true);
allow_comment_or_whitespace(parser);
}
}
e.unexpected_eof(parser.template.length);
}
/**
* @param {Parser} parser
* @param {boolean} [inside_pseudo_class]
* @returns {Css.ComplexSelector}
*/
function read_selector(parser, inside_pseudo_class = false) {
const list_start = parser.index;
/** @type {Css.RelativeSelector[]} */
const children = [];
/**
* @param {Css.Combinator | null} combinator
* @param {number} start
* @returns {Css.RelativeSelector}
*/
function create_selector(combinator, start) {
return {
type: 'RelativeSelector',
combinator,
selectors: [],
start,
end: -1,
metadata: {
is_global: false,
is_global_like: false,
scoped: false
}
};
}
/** @type {Css.RelativeSelector} */
let relative_selector = create_selector(null, parser.index);
while (parser.index < parser.template.length) {
let start = parser.index;
if (parser.eat('&')) {
relative_selector.selectors.push({
type: 'NestingSelector',
name: '&',
start,
end: parser.index
});
} else if (parser.eat('*')) {
let name = '*';
if (parser.eat('|')) {
// * is the namespace (which we ignore)
name = read_identifier(parser);
}
relative_selector.selectors.push({
type: 'TypeSelector',
name,
start,
end: parser.index
});
} else if (parser.eat('#')) {
relative_selector.selectors.push({
type: 'IdSelector',
name: read_identifier(parser),
start,
end: parser.index
});
} else if (parser.eat('.')) {
relative_selector.selectors.push({
type: 'ClassSelector',
name: read_identifier(parser),
start,
end: parser.index
});
} else if (parser.eat('::')) {
relative_selector.selectors.push({
type: 'PseudoElementSelector',
name: read_identifier(parser),
start,
end: parser.index
});
// We read the inner selectors of a pseudo element to ensure it parses correctly,
// but we don't do anything with the result.
if (parser.eat('(')) {
read_selector_list(parser, true);
parser.eat(')', true);
}
} else if (parser.eat(':')) {
const name = read_identifier(parser);
/** @type {null | Css.SelectorList} */
let args = null;
if (parser.eat('(')) {
args = read_selector_list(parser, true);
parser.eat(')', true);
}
relative_selector.selectors.push({
type: 'PseudoClassSelector',
name,
args,
start,
end: parser.index
});
} else if (parser.eat('[')) {
parser.allow_whitespace();
const name = read_identifier(parser);
parser.allow_whitespace();
/** @type {string | null} */
let value = null;
const matcher = parser.read(REGEX_MATCHER);
if (matcher) {
parser.allow_whitespace();
value = read_attribute_value(parser);
}
parser.allow_whitespace();
const flags = parser.read(REGEX_ATTRIBUTE_FLAGS);
parser.allow_whitespace();
parser.eat(']', true);
relative_selector.selectors.push({
type: 'AttributeSelector',
start,
end: parser.index,
name,
matcher,
value,
flags
});
} else if (inside_pseudo_class && parser.match_regex(REGEX_NTH_OF)) {
// nth of matcher must come before combinator matcher to prevent collision else the '+' in '+2n-1' would be parsed as a combinator
relative_selector.selectors.push({
type: 'Nth',
value: /**@type {string} */ (parser.read(REGEX_NTH_OF)),
start,
end: parser.index
});
} else if (parser.match_regex(REGEX_PERCENTAGE)) {
relative_selector.selectors.push({
type: 'Percentage',
value: /** @type {string} */ (parser.read(REGEX_PERCENTAGE)),
start,
end: parser.index
});
} else if (!parser.match_regex(REGEX_COMBINATOR)) {
let name = read_identifier(parser);
if (parser.eat('|')) {
// we ignore the namespace when trying to find matching element classes
name = read_identifier(parser);
}
relative_selector.selectors.push({
type: 'TypeSelector',
name,
start,
end: parser.index
});
}
const index = parser.index;
allow_comment_or_whitespace(parser);
if (parser.match(',') || (inside_pseudo_class ? parser.match(')') : parser.match('{'))) {
// rewind, so we know whether to continue building the selector list
parser.index = index;
relative_selector.end = index;
children.push(relative_selector);
return {
type: 'ComplexSelector',
start: list_start,
end: index,
children,
metadata: {
rule: null,
used: false
}
};
}
parser.index = index;
const combinator = read_combinator(parser);
if (combinator) {
if (relative_selector.selectors.length > 0) {
relative_selector.end = index;
children.push(relative_selector);
}
// ...and start a new one
relative_selector = create_selector(combinator, combinator.start);
parser.allow_whitespace();
if (parser.match(',') || (inside_pseudo_class ? parser.match(')') : parser.match('{'))) {
e.css_selector_invalid(parser.index);
}
}
}
e.unexpected_eof(parser.template.length);
}
/**
* @param {Parser} parser
* @returns {Css.Combinator | null}
*/
function read_combinator(parser) {
const start = parser.index;
parser.allow_whitespace();
const index = parser.index;
const name = parser.read(REGEX_COMBINATOR);
if (name) {
const end = parser.index;
parser.allow_whitespace();
return {
type: 'Combinator',
name,
start: index,
end
};
}
if (parser.index !== start) {
return {
type: 'Combinator',
name: ' ',
start,
end: parser.index
};
}
return null;
}
/**
* @param {Parser} parser
* @returns {Css.Block}
*/
function read_block(parser) {
const start = parser.index;
parser.eat('{', true);
/** @type {Array<Css.Declaration | Css.Rule | Css.Atrule>} */
const children = [];
while (parser.index < parser.template.length) {
allow_comment_or_whitespace(parser);
if (parser.match('}')) {
break;
} else {
children.push(read_block_item(parser));
}
}
parser.eat('}', true);
return {
type: 'Block',
start,
end: parser.index,
children
};
}
/**
* Reads a declaration, rule or at-rule
*
* @param {Parser} parser
* @returns {Css.Declaration | Css.Rule | Css.Atrule}
*/
function read_block_item(parser) {
if (parser.match('@')) {
return read_at_rule(parser);
}
// read ahead to understand whether we're dealing with a declaration or a nested rule.
// this involves some duplicated work, but avoids a try-catch that would disguise errors
const start = parser.index;
read_value(parser);
const char = parser.template[parser.index];
parser.index = start;
return char === '{' ? read_rule(parser) : read_declaration(parser);
}
/**
* @param {Parser} parser
* @returns {Css.Declaration}
*/
function read_declaration(parser) {
const start = parser.index;
const property = parser.read_until(REGEX_WHITESPACE_OR_COLON);
parser.allow_whitespace();
parser.eat(':');
let index = parser.index;
parser.allow_whitespace();
const value = read_value(parser);
if (!value && !property.startsWith('--')) {
e.css_empty_declaration({ start, end: index });
}
const end = parser.index;
if (!parser.match('}')) {
parser.eat(';', true);
}
return {
type: 'Declaration',
start,
end,
property,
value
};
}
/**
* @param {Parser} parser
* @returns {string}
*/
function read_value(parser) {
let value = '';
let escaped = false;
let in_url = false;
/** @type {null | '"' | "'"} */
let quote_mark = null;
while (parser.index < parser.template.length) {
const char = parser.template[parser.index];
if (escaped) {
value += '\\' + char;
escaped = false;
} else if (char === '\\') {
escaped = true;
} else if (char === quote_mark) {
quote_mark = null;
} else if (char === ')') {
in_url = false;
} else if (quote_mark === null && (char === '"' || char === "'")) {
quote_mark = char;
} else if (char === '(' && value.slice(-3) === 'url') {
in_url = true;
} else if ((char === ';' || char === '{' || char === '}') && !in_url && !quote_mark) {
return value.trim();
}
value += char;
parser.index++;
}
e.unexpected_eof(parser.template.length);
}
/**
* Read a property that may or may not be quoted, e.g.
* `foo` or `'foo bar'` or `"foo bar"`
* @param {Parser} parser
*/
function read_attribute_value(parser) {
let value = '';
let escaped = false;
const quote_mark = parser.eat('"') ? '"' : parser.eat("'") ? "'" : null;
while (parser.index < parser.template.length) {
const char = parser.template[parser.index];
if (escaped) {
value += '\\' + char;
escaped = false;
} else if (char === '\\') {
escaped = true;
} else if (quote_mark ? char === quote_mark : REGEX_CLOSING_BRACKET.test(char)) {
if (quote_mark) {
parser.eat(quote_mark, true);
}
return value.trim();
} else {
value += char;
}
parser.index++;
}
e.unexpected_eof(parser.template.length);
}
/**
* https://www.w3.org/TR/CSS21/syndata.html#value-def-identifier
* @param {Parser} parser
*/
function read_identifier(parser) {
const start = parser.index;
let identifier = '';
if (parser.match('--') || parser.match_regex(REGEX_LEADING_HYPHEN_OR_DIGIT)) {
e.css_expected_identifier(start);
}
let escaped = false;
while (parser.index < parser.template.length) {
const char = parser.template[parser.index];
if (escaped) {
identifier += '\\' + char;
escaped = false;
} else if (char === '\\') {
escaped = true;
} else if (
/** @type {number} */ (char.codePointAt(0)) >= 160 ||
REGEX_VALID_IDENTIFIER_CHAR.test(char)
) {
identifier += char;
} else {
break;
}
parser.index++;
}
if (identifier === '') {
e.css_expected_identifier(start);
}
return identifier;
}
/** @param {Parser} parser */
function allow_comment_or_whitespace(parser) {
parser.allow_whitespace();
while (parser.match('/*') || parser.match('<!--')) {
if (parser.eat('/*')) {
parser.read_until(REGEX_COMMENT_CLOSE);
parser.eat('*/', true);
}
if (parser.eat('<!--')) {
parser.read_until(REGEX_HTML_COMMENT_CLOSE);
parser.eat('-->', true);
}
parser.allow_whitespace();
}
}
|