120 lines
3.1 KiB
JavaScript
120 lines
3.1 KiB
JavaScript
// @ts-nocheck
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'use strict';
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const atRuleParamIndex = require('../../utils/atRuleParamIndex');
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const declarationValueIndex = require('../../utils/declarationValueIndex');
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const report = require('../../utils/report');
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const ruleMessages = require('../../utils/ruleMessages');
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const validateOptions = require('../../utils/validateOptions');
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const valueParser = require('postcss-value-parser');
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const ruleName = 'number-no-trailing-zeros';
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const messages = ruleMessages(ruleName, {
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rejected: 'Unexpected trailing zero(s)',
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});
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function rule(actual, secondary, context) {
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return (root, result) => {
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const validOptions = validateOptions(result, ruleName, { actual });
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if (!validOptions) {
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return;
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}
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root.walkAtRules((atRule) => {
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if (atRule.name.toLowerCase() === 'import') {
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return;
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}
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check(atRule, atRule.params, atRuleParamIndex);
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});
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root.walkDecls((decl) => check(decl, decl.value, declarationValueIndex));
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function check(node, value, getIndex) {
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const fixPositions = [];
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// Get out quickly if there are no periods
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if (!value.includes('.')) {
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return;
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}
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valueParser(value).walk((valueNode) => {
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// Ignore `url` function
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if (valueNode.type === 'function' && valueNode.value.toLowerCase() === 'url') {
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return false;
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}
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// Ignore strings, comments, etc
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if (valueNode.type !== 'word') {
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return;
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}
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const match = /\.(\d*?)(0+)(?:\D|$)/.exec(valueNode.value);
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// match[1] is any numbers between the decimal and our trailing zero, could be empty
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// match[2] is our trailing zero(s)
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if (match === null) {
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return;
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}
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// our index is:
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// the index of our valueNode +
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// the index of our match +
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// 1 for our decimal +
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// the length of our potential non-zero number match (match[1])
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const index = valueNode.sourceIndex + match.index + 1 + match[1].length;
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// our startIndex is identical to our index except when we have only
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// trailing zeros after our decimal. in that case we don't need the decimal
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// either so we move our index back by 1.
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const startIndex = match[1].length > 0 ? index : index - 1;
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// our end index is our original index + the length of our trailing zeros
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const endIndex = index + match[2].length;
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if (context.fix) {
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fixPositions.unshift({
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startIndex,
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endIndex,
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});
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return;
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}
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report({
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message: messages.rejected,
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node,
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// this is the index of the _first_ trailing zero
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index: getIndex(node) + index,
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result,
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ruleName,
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});
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});
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if (fixPositions.length) {
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fixPositions.forEach((fixPosition) => {
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const startIndex = fixPosition.startIndex;
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const endIndex = fixPosition.endIndex;
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if (node.type === 'atrule') {
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node.params = removeTrailingZeros(node.params, startIndex, endIndex);
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} else {
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node.value = removeTrailingZeros(node.value, startIndex, endIndex);
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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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function removeTrailingZeros(input, startIndex, endIndex) {
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return input.slice(0, startIndex) + input.slice(endIndex);
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}
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rule.ruleName = ruleName;
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rule.messages = messages;
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module.exports = rule;
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