@wix/css-property-parser
Version:
A comprehensive TypeScript library for parsing and serializing CSS property values with full MDN specification compliance
88 lines (87 loc) • 2.96 kB
JavaScript
"use strict";
// Shared Gap Property Evaluator
// Handles column-gap, row-gap
// Root Type Pattern: CSSLengthValue | CSSPercentageValue | NormalKeyword
Object.defineProperty(exports, "__esModule", { value: true });
exports.parseGapProperty = parseGapProperty;
exports.gapToCSSValue = gapToCSSValue;
const shared_utils_1 = require('../utils/shared-utils.cjs');
const length_1 = require('./length.cjs');
const percentage_1 = require('./percentage.cjs');
const css_variable_1 = require('./css-variable.cjs');
/**
* Generic gap property parser
* @param value - CSS value string to parse
* @returns Parsed gap value or null if invalid
*/
function parseGapProperty(value) {
if (!value || typeof value !== 'string') {
return null;
}
const trimmed = value.trim();
if (trimmed === '') {
return null;
}
// CSS variables can be parsed
if ((0, shared_utils_1.isCssVariable)(trimmed)) {
return (0, css_variable_1.parse)(trimmed);
}
// Handle global keywords (inherit, initial, unset, revert, revert-layer)
if ((0, shared_utils_1.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 = (0, percentage_1.parse)(trimmed);
if (percentageResult) {
// Gap percentages must be non-negative
if (!(0, shared_utils_1.isNonNegative)(percentageResult)) {
return null;
}
return percentageResult;
}
// Try to parse as length
const lengthResult = (0, length_1.parse)(trimmed);
if (lengthResult) {
// Gap lengths must be non-negative
if (!(0, shared_utils_1.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
*/
function gapToCSSValue(parsed) {
if (!parsed) {
return null;
}
// Handle CSS variables
if ('CSSvariable' in parsed) {
return (0, css_variable_1.toCSSValue)(parsed);
}
// Handle keywords
if ('keyword' in parsed) {
return parsed.keyword;
}
// Handle length values (including calc expressions)
if ('unit' in parsed) {
return (0, length_1.toCSSValue)(parsed);
}
// Handle percentage values (including calc expressions)
if ('value' in parsed && !('unit' in parsed)) {
return (0, percentage_1.toCSSValue)(parsed);
}
// Handle calc expressions that could be length or percentage
if ('expression' in parsed) {
return (0, length_1.toCSSValue)(parsed) || (0, percentage_1.toCSSValue)(parsed);
}
return null;
}