@wix/css-property-parser/dist/evaluators/flex-direction.js

A comprehensive TypeScript library for parsing and serializing CSS property values with full MDN specification compliance

// CSS flex-direction property parser
// Handles parsing of CSS flex-direction property according to MDN specification
// https://developer.mozilla.org/en-US/docs/Web/CSS/flex-direction
import { isCssVariable, isGlobalKeyword } from '../utils/shared-utils.js';
import { parse as parseCSSVariable, toCSSValue as cssVariableToCSSValue } from './css-variable.js';
import { FLEX_DIRECTION_KEYWORDS } from '../types.js';
/**
 * Checks if a string is a valid flex-direction keyword
 */
function isFlexDirectionKeyword(value) {
    return FLEX_DIRECTION_KEYWORDS.includes(value.toLowerCase());
}
/**
 * Parses a CSS flex-direction property string into structured components
 * Follows MDN specification: https://developer.mozilla.org/en-US/docs/Web/CSS/flex-direction
 */
export function parse(value) {
    if (!value || typeof value !== 'string') {
        return null;
    }
    const trimmed = value.trim();
    if (trimmed === '') {
        return null;
    }
    // CSS variables can be parsed directly
    if (isCssVariable(trimmed)) {
        return parseCSSVariable(trimmed);
    }
    // Handle global keywords
    if (isGlobalKeyword(trimmed)) {
        return {
            type: 'keyword',
            keyword: trimmed.toLowerCase()
        };
    }
    // Handle flex-direction keywords
    if (isFlexDirectionKeyword(trimmed)) {
        return {
            type: 'keyword',
            keyword: trimmed.toLowerCase()
        };
    }
    return null;
}
/**
 * Converts a parsed flex-direction back to a CSS value string
 */
export function toCSSValue(parsed) {
    if (!parsed) {
        return null;
    }
    // Handle CSS variables
    if ('CSSvariable' in parsed) {
        return cssVariableToCSSValue(parsed);
    }
    // Handle keyword values
    if ('keyword' in parsed) {
        return parsed.keyword;
    }
    return null;
}