@wix/css-property-parser/dist/evaluators/shared-gap.js

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

// Shared Gap Property Evaluator
// Handles column-gap, row-gap
// Root Type Pattern: CSSLengthValue | CSSPercentageValue | NormalKeyword
import { isGlobalKeyword, isCssVariable, isNonNegative } from '../utils/shared-utils.js';
import { parse as parseLength, toCSSValue as lengthToCSSValue } from './length.js';
import { parse as parsePercentage, toCSSValue as percentageToCSSValue } from './percentage.js';
import { parse as parseCSSVariable, toCSSValue as cssVariableToCSSValue } from './css-variable.js';
/**
 * Generic gap property parser
 * @param value - CSS value string to parse
 * @returns Parsed gap value or null if invalid
 */
export function parseGapProperty(value) {
    if (!value || typeof value !== 'string') {
        return null;
    }
    const trimmed = value.trim();
    if (trimmed === '') {
        return null;
    }
    // CSS variables can be parsed
    if (isCssVariable(trimmed)) {
        return parseCSSVariable(trimmed);
    }
    // Handle global keywords (inherit, initial, unset, revert, revert-layer)
    if (isGlobalKeyword(trimmed)) {
        return { type: 'keyword', keyword: trimmed.toLowerCase() };
    }
    // Handle gap-specific keyword: normal
    if (trimmed.toLowerCase() === 'normal') {
        return { type: 'keyword', keyword: 'normal' };
    }
    // Try to parse as percentage first (before length, since length includes %)
    const percentageResult = parsePercentage(trimmed);
    if (percentageResult) {
        // Gap percentages must be non-negative
        if (!isNonNegative(percentageResult)) {
            return null;
        }
        return percentageResult;
    }
    // Try to parse as length
    const lengthResult = parseLength(trimmed);
    if (lengthResult) {
        // Gap lengths must be non-negative
        if (!isNonNegative(lengthResult)) {
            return null;
        }
        return lengthResult;
    }
    return null;
}
/**
 * Generic gap property toCSSValue converter
 * @param parsed - Parsed gap value
 * @returns CSS string or null if invalid
 */
export function gapToCSSValue(parsed) {
    if (!parsed) {
        return null;
    }
    // Handle CSS variables
    if ('CSSvariable' in parsed) {
        return cssVariableToCSSValue(parsed);
    }
    // Handle keywords
    if ('keyword' in parsed) {
        return parsed.keyword;
    }
    // Handle length values (including calc expressions)
    if ('unit' in parsed) {
        return lengthToCSSValue(parsed);
    }
    // Handle percentage values (including calc expressions)
    if ('value' in parsed && !('unit' in parsed)) {
        return percentageToCSSValue(parsed);
    }
    // Handle calc expressions that could be length or percentage
    if ('expression' in parsed) {
        return lengthToCSSValue(parsed) || percentageToCSSValue(parsed);
    }
    return null;
}