125 lines
3.7 KiB
Plaintext
125 lines
3.7 KiB
Plaintext
'use strict';
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var utils = require('../utils.js');
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require('eslint-visitor-keys');
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require('espree');
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require('estraverse');
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function getPropName(context, propNode) {
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if (propNode.type === "JSXSpreadAttribute")
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return context.sourceCode.getText(propNode.argument);
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return propNode.name.name;
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}
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const messages = {
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newLine: "Prop `{{prop}}` must be placed on a new line"
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};
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var jsxMaxPropsPerLine = utils.createRule({
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name: "jsx-max-props-per-line",
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package: "jsx",
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meta: {
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type: "layout",
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docs: {
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description: "Enforce maximum of props on a single line in JSX"
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},
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fixable: "code",
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messages,
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schema: [{
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anyOf: [{
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type: "object",
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properties: {
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maximum: {
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type: "object",
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properties: {
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single: {
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type: "integer",
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minimum: 1
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},
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multi: {
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type: "integer",
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minimum: 1
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}
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}
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}
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},
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additionalProperties: false
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}, {
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type: "object",
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properties: {
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maximum: {
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type: "number",
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minimum: 1
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},
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when: {
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type: "string",
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enum: ["always", "multiline"]
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}
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},
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additionalProperties: false
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}]
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}]
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},
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create(context) {
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const configuration = context.options[0] || {};
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const maximum = configuration.maximum || 1;
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const maxConfig = typeof maximum === "number" ? {
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single: configuration.when === "multiline" ? Infinity : maximum,
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multi: maximum
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} : {
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single: maximum.single || Infinity,
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multi: maximum.multi || Infinity
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};
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function generateFixFunction(line, max) {
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const sourceCode = context.sourceCode;
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const output = [];
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const front = line[0].range[0];
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const back = line[line.length - 1].range[1];
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for (let i = 0; i < line.length; i += max) {
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const nodes = line.slice(i, i + max);
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output.push(nodes.reduce((prev, curr) => {
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if (prev === "")
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return sourceCode.getText(curr);
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return `${prev} ${sourceCode.getText(curr)}`;
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}, ""));
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}
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const code = output.join("\n");
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return function fix(fixer) {
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return fixer.replaceTextRange([front, back], code);
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};
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}
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return {
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JSXOpeningElement(node) {
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if (!node.attributes.length)
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return;
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const isSingleLineTag = node.loc.start.line === node.loc.end.line;
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if ((isSingleLineTag ? maxConfig.single : maxConfig.multi) === Infinity)
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return;
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const firstProp = node.attributes[0];
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const linePartitionedProps = [[firstProp]];
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node.attributes.reduce((last, decl) => {
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if (last.loc.end.line === decl.loc.start.line)
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linePartitionedProps[linePartitionedProps.length - 1].push(decl);
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else
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linePartitionedProps.push([decl]);
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return decl;
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});
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linePartitionedProps.forEach((propsInLine) => {
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const maxPropsCountPerLine = isSingleLineTag && propsInLine[0].loc.start.line === node.loc.start.line ? maxConfig.single : maxConfig.multi;
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if (propsInLine.length > maxPropsCountPerLine) {
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const name = getPropName(context, propsInLine[maxPropsCountPerLine]);
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context.report({
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messageId: "newLine",
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node: propsInLine[maxPropsCountPerLine],
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data: {
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prop: name
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},
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fix: generateFixFunction(propsInLine, maxPropsCountPerLine)
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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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module.exports = jsxMaxPropsPerLine;
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