@wix/css-property-parser
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A comprehensive TypeScript library for parsing and serializing CSS property values with full MDN specification compliance
81 lines (80 loc) • 2.94 kB
JavaScript
// CSS logical border radius shared evaluator
// Eliminates code duplication across all logical border radius properties
// Maps to physical border radius properties based on writing mode and direction
import { parse as parseLength } from './length.js';
import { parse as parsePercentage } from './percentage.js';
import { parse as parseCSSVariable, toCSSValue as cssVariableToCSSValue } from './css-variable.js';
import { isCssVariable, isGlobalKeyword, isNonNegative } from '../utils/shared-utils.js';
/**
* Shared parser for all logical border radius properties
* Handles length, percentage, CSS functions, keywords, and variables with non-negative validation
*
* @param value - The CSS value to parse
* @returns Parsed value or null if invalid
*
* @example
* parseLogicalBorderRadiusProperty('10px') // { type: 'length', value: 10, unit: 'px' }
* parseLogicalBorderRadiusProperty('50%') // { type: 'percentage', value: 50, unit: '%' }
* parseLogicalBorderRadiusProperty('inherit') // { type: 'keyword', keyword: 'inherit' }
*/
export function parseLogicalBorderRadiusProperty(value) {
if (!value || typeof value !== 'string') {
return null;
}
const trimmed = value.trim();
if (!trimmed) {
return null;
}
// CSS variables
if (isCssVariable(trimmed)) {
return parseCSSVariable(trimmed);
}
// Global keywords
if (isGlobalKeyword(trimmed)) {
return { type: 'keyword', keyword: trimmed.toLowerCase() };
}
// Try percentage first (to handle cases like '50%')
const percentageResult = parsePercentage(trimmed);
if (percentageResult && isNonNegative(percentageResult)) {
return percentageResult;
}
// Try length
const lengthResult = parseLength(trimmed);
if (lengthResult && isNonNegative(lengthResult)) {
return lengthResult;
}
return null;
}
/**
* Shared toCSSValue function for all logical border radius properties
* Converts parsed values back to CSS string representation
*
* @param parsed - The parsed value to convert
* @returns CSS string or null if invalid
*
* @example
* logicalBorderRadiusToCSSValue({ type: 'length', value: 10, unit: 'px' }) // '10px'
* logicalBorderRadiusToCSSValue({ type: 'percentage', value: 50, unit: '%' }) // '50%'
* logicalBorderRadiusToCSSValue({ type: 'keyword', keyword: 'inherit' }) // 'inherit'
*/
export function logicalBorderRadiusToCSSValue(parsed) {
if (!parsed) {
return null;
}
if ('CSSvariable' in parsed) {
return cssVariableToCSSValue(parsed);
}
if ('keyword' in parsed) {
return parsed.keyword;
}
if (parsed.type === 'length') {
return `${parsed.value}${parsed.unit}`;
}
if (parsed.type === 'percentage') {
return `${parsed.value}%`;
}
if (parsed.type === 'function') {
return `${parsed.function}(${parsed.expression})`;
}
return null;
}