442 lines
14 KiB
JavaScript
442 lines
14 KiB
JavaScript
/**
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* @fileoverview Validate JSX indentation
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* @author Yannick Croissant
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* This rule has been ported and modified from eslint and nodeca.
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* @author Vitaly Puzrin
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* @author Gyandeep Singh
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* @copyright 2015 Vitaly Puzrin. All rights reserved.
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* @copyright 2015 Gyandeep Singh. All rights reserved.
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Copyright (C) 2014 by Vitaly Puzrin
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Permission is hereby granted, free of charge, to any person obtaining a copy
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of this software and associated documentation files (the 'Software'), to deal
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in the Software without restriction, including without limitation the rights
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to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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copies of the Software, and to permit persons to whom the Software is
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furnished to do so, subject to the following conditions:
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The above copyright notice and this permission notice shall be included in
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all copies or substantial portions of the Software.
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THE SOFTWARE IS PROVIDED 'AS IS', WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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THE SOFTWARE.
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*/
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'use strict';
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const matchAll = require('string.prototype.matchall');
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const astUtil = require('../util/ast');
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const docsUrl = require('../util/docsUrl');
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const reportC = require('../util/report');
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const jsxUtil = require('../util/jsx');
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// ------------------------------------------------------------------------------
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// Rule Definition
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// ------------------------------------------------------------------------------
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const messages = {
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wrongIndent: 'Expected indentation of {{needed}} {{type}} {{characters}} but found {{gotten}}.',
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};
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module.exports = {
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meta: {
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docs: {
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description: 'Enforce JSX indentation',
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category: 'Stylistic Issues',
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recommended: false,
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url: docsUrl('jsx-indent'),
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},
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fixable: 'whitespace',
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messages,
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schema: [{
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anyOf: [{
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enum: ['tab'],
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}, {
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type: 'integer',
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}],
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}, {
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type: 'object',
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properties: {
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checkAttributes: {
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type: 'boolean',
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},
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indentLogicalExpressions: {
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type: 'boolean',
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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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create(context) {
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const extraColumnStart = 0;
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let indentType = 'space';
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let indentSize = 4;
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if (context.options.length) {
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if (context.options[0] === 'tab') {
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indentSize = 1;
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indentType = 'tab';
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} else if (typeof context.options[0] === 'number') {
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indentSize = context.options[0];
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indentType = 'space';
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}
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}
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const indentChar = indentType === 'space' ? ' ' : '\t';
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const options = context.options[1] || {};
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const checkAttributes = options.checkAttributes || false;
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const indentLogicalExpressions = options.indentLogicalExpressions || false;
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/**
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* Responsible for fixing the indentation issue fix
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* @param {ASTNode} node Node violating the indent rule
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* @param {Number} needed Expected indentation character count
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* @returns {Function} function to be executed by the fixer
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* @private
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*/
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function getFixerFunction(node, needed) {
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const indent = Array(needed + 1).join(indentChar);
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if (node.type === 'JSXText' || node.type === 'Literal') {
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return function fix(fixer) {
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const regExp = /\n[\t ]*(\S)/g;
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const fixedText = node.raw.replace(regExp, (match, p1) => `\n${indent}${p1}`);
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return fixer.replaceText(node, fixedText);
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};
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}
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if (node.type === 'ReturnStatement') {
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const raw = context.getSourceCode().getText(node);
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const lines = raw.split('\n');
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if (lines.length > 1) {
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return function fix(fixer) {
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const lastLineStart = raw.lastIndexOf('\n');
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const lastLine = raw.slice(lastLineStart).replace(/^\n[\t ]*(\S)/, (match, p1) => `\n${indent}${p1}`);
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return fixer.replaceTextRange(
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[node.range[0] + lastLineStart, node.range[1]],
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lastLine
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);
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};
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}
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}
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return function fix(fixer) {
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return fixer.replaceTextRange(
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[node.range[0] - node.loc.start.column, node.range[0]],
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indent
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);
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};
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}
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/**
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* Reports a given indent violation and properly pluralizes the message
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* @param {ASTNode} node Node violating the indent rule
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* @param {Number} needed Expected indentation character count
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* @param {Number} gotten Indentation character count in the actual node/code
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* @param {Object} [loc] Error line and column location
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*/
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function report(node, needed, gotten, loc) {
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const msgContext = {
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needed,
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type: indentType,
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characters: needed === 1 ? 'character' : 'characters',
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gotten,
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};
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reportC(context, messages.wrongIndent, 'wrongIndent', Object.assign({
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node,
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data: msgContext,
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fix: getFixerFunction(node, needed),
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}, loc && { loc }));
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}
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/**
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* Get node indent
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* @param {ASTNode} node Node to examine
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* @param {Boolean} [byLastLine] get indent of node's last line
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* @param {Boolean} [excludeCommas] skip comma on start of line
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* @return {Number} Indent
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*/
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function getNodeIndent(node, byLastLine, excludeCommas) {
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let src = context.getSourceCode().getText(node, node.loc.start.column + extraColumnStart);
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const lines = src.split('\n');
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if (byLastLine) {
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src = lines[lines.length - 1];
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} else {
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src = lines[0];
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}
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const skip = excludeCommas ? ',' : '';
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let regExp;
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if (indentType === 'space') {
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regExp = new RegExp(`^[ ${skip}]+`);
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} else {
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regExp = new RegExp(`^[\t${skip}]+`);
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}
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const indent = regExp.exec(src);
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return indent ? indent[0].length : 0;
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}
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/**
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* Check if the node is the right member of a logical expression
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* @param {ASTNode} node The node to check
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* @return {Boolean} true if its the case, false if not
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*/
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function isRightInLogicalExp(node) {
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return (
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node.parent
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&& node.parent.parent
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&& node.parent.parent.type === 'LogicalExpression'
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&& node.parent.parent.right === node.parent
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&& !indentLogicalExpressions
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);
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}
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/**
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* Check if the node is the alternate member of a conditional expression
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* @param {ASTNode} node The node to check
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* @return {Boolean} true if its the case, false if not
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*/
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function isAlternateInConditionalExp(node) {
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return (
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node.parent
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&& node.parent.parent
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&& node.parent.parent.type === 'ConditionalExpression'
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&& node.parent.parent.alternate === node.parent
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&& context.getSourceCode().getTokenBefore(node).value !== '('
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);
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}
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/**
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* Check if the node is within a DoExpression block but not the first expression (which need to be indented)
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* @param {ASTNode} node The node to check
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* @return {Boolean} true if its the case, false if not
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*/
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function isSecondOrSubsequentExpWithinDoExp(node) {
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/*
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It returns true when node.parent.parent.parent.parent matches:
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DoExpression({
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...,
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body: BlockStatement({
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...,
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body: [
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..., // 1-n times
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ExpressionStatement({
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...,
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expression: JSXElement({
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...,
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openingElement: JSXOpeningElement() // the node
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})
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}),
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... // 0-n times
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]
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})
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})
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except:
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DoExpression({
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...,
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body: BlockStatement({
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...,
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body: [
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ExpressionStatement({
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...,
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expression: JSXElement({
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...,
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openingElement: JSXOpeningElement() // the node
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})
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}),
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... // 0-n times
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]
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})
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})
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*/
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const isInExpStmt = (
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node.parent
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&& node.parent.parent
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&& node.parent.parent.type === 'ExpressionStatement'
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);
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if (!isInExpStmt) {
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return false;
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}
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const expStmt = node.parent.parent;
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const isInBlockStmtWithinDoExp = (
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expStmt.parent
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&& expStmt.parent.type === 'BlockStatement'
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&& expStmt.parent.parent
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&& expStmt.parent.parent.type === 'DoExpression'
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);
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if (!isInBlockStmtWithinDoExp) {
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return false;
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}
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const blockStmt = expStmt.parent;
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const blockStmtFirstExp = blockStmt.body[0];
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return !(blockStmtFirstExp === expStmt);
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}
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/**
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* Check indent for nodes list
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* @param {ASTNode} node The node to check
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* @param {Number} indent needed indent
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* @param {Boolean} [excludeCommas] skip comma on start of line
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*/
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function checkNodesIndent(node, indent, excludeCommas) {
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const nodeIndent = getNodeIndent(node, false, excludeCommas);
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const isCorrectRightInLogicalExp = isRightInLogicalExp(node) && (nodeIndent - indent) === indentSize;
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const isCorrectAlternateInCondExp = isAlternateInConditionalExp(node) && (nodeIndent - indent) === 0;
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if (
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nodeIndent !== indent
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&& astUtil.isNodeFirstInLine(context, node)
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&& !isCorrectRightInLogicalExp
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&& !isCorrectAlternateInCondExp
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) {
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report(node, indent, nodeIndent);
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}
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}
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/**
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* Check indent for Literal Node or JSXText Node
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* @param {ASTNode} node The node to check
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* @param {Number} indent needed indent
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*/
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function checkLiteralNodeIndent(node, indent) {
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const value = node.value;
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const regExp = indentType === 'space' ? /\n( *)[\t ]*\S/g : /\n(\t*)[\t ]*\S/g;
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const nodeIndentsPerLine = Array.from(
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matchAll(String(value), regExp),
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(match) => (match[1] ? match[1].length : 0)
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);
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const hasFirstInLineNode = nodeIndentsPerLine.length > 0;
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if (
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hasFirstInLineNode
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&& !nodeIndentsPerLine.every((actualIndent) => actualIndent === indent)
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) {
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nodeIndentsPerLine.forEach((nodeIndent) => {
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report(node, indent, nodeIndent);
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});
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}
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}
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function handleOpeningElement(node) {
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const sourceCode = context.getSourceCode();
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let prevToken = sourceCode.getTokenBefore(node);
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if (!prevToken) {
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return;
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}
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// Use the parent in a list or an array
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if (prevToken.type === 'JSXText' || ((prevToken.type === 'Punctuator') && prevToken.value === ',')) {
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prevToken = sourceCode.getNodeByRangeIndex(prevToken.range[0]);
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prevToken = prevToken.type === 'Literal' || prevToken.type === 'JSXText' ? prevToken.parent : prevToken;
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// Use the first non-punctuator token in a conditional expression
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} else if (prevToken.type === 'Punctuator' && prevToken.value === ':') {
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do {
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prevToken = sourceCode.getTokenBefore(prevToken);
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} while (prevToken.type === 'Punctuator' && prevToken.value !== '/');
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prevToken = sourceCode.getNodeByRangeIndex(prevToken.range[0]);
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while (prevToken.parent && prevToken.parent.type !== 'ConditionalExpression') {
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prevToken = prevToken.parent;
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}
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}
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prevToken = prevToken.type === 'JSXExpressionContainer' ? prevToken.expression : prevToken;
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const parentElementIndent = getNodeIndent(prevToken);
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const indent = (
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prevToken.loc.start.line === node.loc.start.line
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|| isRightInLogicalExp(node)
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|| isAlternateInConditionalExp(node)
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|| isSecondOrSubsequentExpWithinDoExp(node)
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) ? 0 : indentSize;
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checkNodesIndent(node, parentElementIndent + indent);
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}
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function handleClosingElement(node) {
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if (!node.parent) {
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return;
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}
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const peerElementIndent = getNodeIndent(node.parent.openingElement || node.parent.openingFragment);
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checkNodesIndent(node, peerElementIndent);
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}
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function handleAttribute(node) {
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if (!checkAttributes || (!node.value || node.value.type !== 'JSXExpressionContainer')) {
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return;
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}
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const nameIndent = getNodeIndent(node.name);
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const lastToken = context.getSourceCode().getLastToken(node.value);
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const firstInLine = astUtil.getFirstNodeInLine(context, lastToken);
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const indent = node.name.loc.start.line === firstInLine.loc.start.line ? 0 : nameIndent;
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checkNodesIndent(firstInLine, indent);
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}
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function handleLiteral(node) {
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if (!node.parent) {
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return;
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}
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if (node.parent.type !== 'JSXElement' && node.parent.type !== 'JSXFragment') {
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return;
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}
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const parentNodeIndent = getNodeIndent(node.parent);
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checkLiteralNodeIndent(node, parentNodeIndent + indentSize);
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}
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return {
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JSXOpeningElement: handleOpeningElement,
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JSXOpeningFragment: handleOpeningElement,
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JSXClosingElement: handleClosingElement,
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JSXClosingFragment: handleClosingElement,
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JSXAttribute: handleAttribute,
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JSXExpressionContainer(node) {
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if (!node.parent) {
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return;
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}
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const parentNodeIndent = getNodeIndent(node.parent);
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checkNodesIndent(node, parentNodeIndent + indentSize);
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},
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Literal: handleLiteral,
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JSXText: handleLiteral,
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ReturnStatement(node) {
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if (
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!node.parent
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|| !jsxUtil.isJSX(node.argument)
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) {
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return;
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}
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let fn = node.parent;
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while (fn && fn.type !== 'FunctionDeclaration' && fn.type !== 'FunctionExpression') {
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fn = fn.parent;
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}
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if (
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!fn
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|| !jsxUtil.isReturningJSX(node, context, true)
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) {
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return;
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}
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const openingIndent = getNodeIndent(node);
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const closingIndent = getNodeIndent(node, true);
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if (openingIndent !== closingIndent) {
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report(node, openingIndent, closingIndent);
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}
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},
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};
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},
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};
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