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120 lines
3.8 KiB
JavaScript
120 lines
3.8 KiB
JavaScript
/**
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* Licensed to the Apache Software Foundation (ASF) under one
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* or more contributor license agreements. See the NOTICE file
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* distributed with this work for additional information
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* regarding copyright ownership. The ASF licenses this file
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* to you under the Apache License, Version 2.0 (the
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* "License"); you may not use this file except in compliance
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* with the License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing,
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* software distributed under the License is distributed on an
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* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
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* KIND, either express or implied. See the License for the
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* specific language governing permissions and limitations
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* under the License.
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*/
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/**
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* @fileoverview Rule to warn about literal colors
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* @author Apache
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*/
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const COLOR_KEYWORDS = require('./colors');
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function hasHexColor(quasi) {
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if (typeof quasi === 'string') {
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const regex = /#([a-f0-9]{3}|[a-f0-9]{4}(?:[a-f0-9]{2}){0,2})\b/gi;
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return !!quasi.match(regex);
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}
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return false;
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}
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function hasRgbColor(quasi) {
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if (typeof quasi === 'string') {
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const regex = /rgba?\((\d+),\s*(\d+),\s*(\d+)(?:,\s*(\d+(?:\.\d+)?))?\)/i;
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return !!quasi.match(regex);
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}
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return false;
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}
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function hasLiteralColor(quasi, strict = false) {
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if (typeof quasi === 'string') {
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// matches literal colors at the start or end of a CSS prop
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return COLOR_KEYWORDS.some(color => {
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const regexColon = new RegExp(`: ${color}`);
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const regexSemicolon = new RegExp(` ${color};`);
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return (
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!!quasi.match(regexColon) ||
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!!quasi.match(regexSemicolon) ||
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(strict && quasi === color)
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);
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});
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}
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return false;
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}
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const WARNING_MESSAGE =
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'Theme color variables are preferred over rgb(a)/hex/literal colors';
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//------------------------------------------------------------------------------
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// Rule Definition
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//------------------------------------------------------------------------------
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/** @type {import('eslint').Rule.RuleModule} */
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module.exports = {
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rules: {
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'no-literal-colors': {
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create(context) {
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const warned = [];
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return {
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TemplateElement(node) {
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const rawValue = node?.value?.raw;
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const isChildParentTagged =
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node?.parent?.parent?.type === 'TaggedTemplateExpression';
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const isChildParentArrow =
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node?.parent?.parent?.type === 'ArrowFunctionExpression';
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const isParentTemplateLiteral =
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node?.parent?.type === 'TemplateLiteral';
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const loc = node?.parent?.parent?.loc;
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const locId = loc && JSON.stringify(loc);
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const hasWarned = warned.includes(locId);
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if (
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!hasWarned &&
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(isChildParentTagged ||
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(isChildParentArrow && isParentTemplateLiteral)) &&
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rawValue &&
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(hasLiteralColor(rawValue) ||
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hasHexColor(rawValue) ||
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hasRgbColor(rawValue))
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) {
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context.report(node, loc, WARNING_MESSAGE);
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warned.push(locId);
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}
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},
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Literal(node) {
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const value = node?.value;
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const isParentProperty = node?.parent?.type === 'Property';
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const locId = JSON.stringify(node.loc);
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const hasWarned = warned.includes(locId);
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if (
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!hasWarned &&
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isParentProperty &&
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value &&
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(hasLiteralColor(value, true) ||
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hasHexColor(value) ||
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hasRgbColor(value))
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) {
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context.report(node, node.loc, WARNING_MESSAGE);
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warned.push(locId);
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}
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},
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};
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},
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},
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},
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};
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