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731 lines
25 KiB
731 lines
25 KiB
/**
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* @fileoverview This option sets a specific tab width for your code
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* This rule has been ported and modified from 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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//------------------------------------------------------------------------------
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// Rule Definition
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//------------------------------------------------------------------------------
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var util = require("util");
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var lodash = require("lodash");
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module.exports = function(context) {
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var MESSAGE = "Expected indentation of {{needed}} {{type}} {{characters}} but found {{gotten}}.";
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var DEFAULT_VARIABLE_INDENT = 1;
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var indentType = "space";
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var indentSize = 4;
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var options = {
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SwitchCase: 0,
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VariableDeclarator: {
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var: DEFAULT_VARIABLE_INDENT,
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let: DEFAULT_VARIABLE_INDENT,
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const: DEFAULT_VARIABLE_INDENT
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}
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};
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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 /* istanbul ignore else : this will be caught by options validation */ 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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if (context.options[1]) {
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var opts = context.options[1];
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options.SwitchCase = opts.SwitchCase || 0;
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var variableDeclaratorRules = opts.VariableDeclarator;
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if (typeof variableDeclaratorRules === "number") {
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options.VariableDeclarator = {
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var: variableDeclaratorRules,
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let: variableDeclaratorRules,
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const: variableDeclaratorRules
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};
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} else if (typeof variableDeclaratorRules === "object") {
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lodash.assign(options.VariableDeclarator, variableDeclaratorRules);
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}
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}
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}
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var indentPattern = {
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normal: indentType === "space" ? /^ +/ : /^\t+/,
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excludeCommas: indentType === "space" ? /^[ ,]+/ : /^[\t,]+/
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};
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var caseIndentStore = {};
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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 {int} needed Expected indentation character count
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* @param {int} 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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* @param {boolean} isLastNodeCheck Is the error for last node check
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* @returns {void}
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*/
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function report(node, needed, gotten, loc, isLastNodeCheck) {
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var msgContext = {
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needed: needed,
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type: indentType,
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characters: needed === 1 ? "character" : "characters",
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gotten: gotten
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};
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var indentChar = indentType === "space" ? " " : "\t";
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/**
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* Responsible for fixing the indentation issue fix
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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() {
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var rangeToFix = [];
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if (needed > gotten) {
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var spaces = "" + new Array(needed - gotten + 1).join(indentChar); // replace with repeat in future
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if (isLastNodeCheck === true) {
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rangeToFix = [
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node.range[1] - 1,
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node.range[1] - 1
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];
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} else {
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rangeToFix = [
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node.range[0],
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node.range[0]
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];
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}
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return function(fixer) {
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return fixer.insertTextBeforeRange(rangeToFix, spaces);
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};
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} else {
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if (isLastNodeCheck === true) {
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rangeToFix = [
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node.range[1] - (gotten - needed) - 1,
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node.range[1] - 1
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];
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} else {
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rangeToFix = [
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node.range[0] - (gotten - needed),
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node.range[0]
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];
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}
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return function(fixer) {
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return fixer.removeRange(rangeToFix);
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};
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}
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}
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if (loc) {
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context.report({
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node: node,
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loc: loc,
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message: MESSAGE,
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data: msgContext,
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fix: getFixerFunction()
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});
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} else {
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context.report({
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node: node,
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message: MESSAGE,
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data: msgContext,
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fix: getFixerFunction()
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});
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}
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}
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/**
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* Get node indent
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* @param {ASTNode|Token} node Node to examine
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* @param {boolean} [byLastLine=false] get indent of node's last line
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* @param {boolean} [excludeCommas=false] skip comma on start of line
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* @returns {int} Indent
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*/
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function getNodeIndent(node, byLastLine, excludeCommas) {
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var token = byLastLine ? context.getLastToken(node) : context.getFirstToken(node);
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var src = context.getSource(token, token.loc.start.column);
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var regExp = excludeCommas ? indentPattern.excludeCommas : indentPattern.normal;
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var 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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* Checks node is the first in its own start line. By default it looks by start line.
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* @param {ASTNode} node The node to check
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* @param {boolean} [byEndLocation=false] Lookup based on start position or end
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* @returns {boolean} true if its the first in the its start line
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*/
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function isNodeFirstInLine(node, byEndLocation) {
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var firstToken = byEndLocation === true ? context.getLastToken(node, 1) : context.getTokenBefore(node),
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startLine = byEndLocation === true ? node.loc.end.line : node.loc.start.line,
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endLine = firstToken ? firstToken.loc.end.line : -1;
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return startLine !== endLine;
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}
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/**
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* Check indent for nodes list
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* @param {ASTNode[]} nodes list of node objects
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* @param {int} indent needed indent
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* @param {boolean} [excludeCommas=false] skip comma on start of line
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* @returns {void}
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*/
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function checkNodesIndent(nodes, indent, excludeCommas) {
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nodes.forEach(function(node) {
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var nodeIndent = getNodeIndent(node, false, excludeCommas);
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if (
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node.type !== "ArrayExpression" && node.type !== "ObjectExpression" &&
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nodeIndent !== indent && isNodeFirstInLine(node)
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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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/**
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* Check last node line indent this detects, that block closed correctly
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* @param {ASTNode} node Node to examine
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* @param {int} lastLineIndent needed indent
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* @returns {void}
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*/
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function checkLastNodeLineIndent(node, lastLineIndent) {
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var lastToken = context.getLastToken(node);
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var endIndent = getNodeIndent(lastToken, true);
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if (endIndent !== lastLineIndent && isNodeFirstInLine(node, true)) {
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report(
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node,
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lastLineIndent,
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endIndent,
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{ line: lastToken.loc.start.line, column: lastToken.loc.start.column },
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true
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);
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}
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}
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/**
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* Check first node line indent is correct
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* @param {ASTNode} node Node to examine
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* @param {int} firstLineIndent needed indent
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* @returns {void}
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*/
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function checkFirstNodeLineIndent(node, firstLineIndent) {
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var startIndent = getNodeIndent(node, false);
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if (startIndent !== firstLineIndent && isNodeFirstInLine(node)) {
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report(
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node,
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firstLineIndent,
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startIndent,
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{ line: node.loc.start.line, column: node.loc.start.column }
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);
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}
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}
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/**
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* Returns the VariableDeclarator based on the current node
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* if not present then return null
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* @param {ASTNode} node node to examine
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* @returns {ASTNode|void} if found then node otherwise null
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*/
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function getVariableDeclaratorNode(node) {
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var parent = node.parent;
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while (parent.type !== "VariableDeclarator" && parent.type !== "Program") {
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parent = parent.parent;
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}
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return parent.type === "VariableDeclarator" ? parent : null;
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}
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/**
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* Check to see if the node is part of the multi-line variable declaration.
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* Also if its on the same line as the varNode
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* @param {ASTNode} node node to check
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* @param {ASTNode} varNode variable declaration node to check against
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* @returns {boolean} True if all the above condition satisfy
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*/
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function isNodeInVarOnTop(node, varNode) {
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return varNode &&
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varNode.parent.loc.start.line === node.loc.start.line &&
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varNode.parent.declarations.length > 1;
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}
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/**
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* Check to see if the argument before the callee node is multi-line and
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* there should only be 1 argument before the callee node
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* @param {ASTNode} node node to check
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* @returns {boolean} True if arguments are multi-line
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*/
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function isArgBeforeCalleeNodeMultiline(node) {
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var parent = node.parent;
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if (parent.arguments.length >= 2 && parent.arguments[1] === node) {
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return parent.arguments[0].loc.end.line > parent.arguments[0].loc.start.line;
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}
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return false;
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}
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/**
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* Check indent for function block content
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* @param {ASTNode} node node to examine
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* @returns {void}
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*/
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function checkIndentInFunctionBlock(node) {
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// Search first caller in chain.
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// Ex.:
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//
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// Models <- Identifier
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// .User
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// .find()
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// .exec(function() {
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// // function body
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// });
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//
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// Looks for 'Models'
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var calleeNode = node.parent; // FunctionExpression
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var indent;
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if (calleeNode.parent &&
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(calleeNode.parent.type === "Property" ||
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calleeNode.parent.type === "ArrayExpression")) {
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// If function is part of array or object, comma can be put at left
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indent = getNodeIndent(calleeNode, false, false);
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} else {
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// If function is standalone, simple calculate indent
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indent = getNodeIndent(calleeNode);
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}
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if (calleeNode.parent.type === "CallExpression") {
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var calleeParent = calleeNode.parent;
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if (calleeNode.type !== "FunctionExpression" && calleeNode.type !== "ArrowFunctionExpression") {
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if (calleeParent && calleeParent.loc.start.line < node.loc.start.line) {
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indent = getNodeIndent(calleeParent);
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}
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} else {
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if (isArgBeforeCalleeNodeMultiline(calleeNode) &&
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calleeParent.callee.loc.start.line === calleeParent.callee.loc.end.line &&
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!isNodeFirstInLine(calleeNode)) {
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indent = getNodeIndent(calleeParent);
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}
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}
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}
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// function body indent should be indent + indent size
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indent += indentSize;
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// check if the node is inside a variable
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var parentVarNode = getVariableDeclaratorNode(node);
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if (parentVarNode && isNodeInVarOnTop(node, parentVarNode)) {
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indent += indentSize * options.VariableDeclarator[parentVarNode.parent.kind];
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}
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if (node.body.length > 0) {
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checkNodesIndent(node.body, indent);
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}
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checkLastNodeLineIndent(node, indent - indentSize);
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}
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/**
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* Checks if the given node starts and ends on the same line
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* @param {ASTNode} node The node to check
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* @returns {boolean} Whether or not the block starts and ends on the same line.
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*/
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function isSingleLineNode(node) {
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var lastToken = context.getLastToken(node),
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startLine = node.loc.start.line,
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endLine = lastToken.loc.end.line;
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return startLine === endLine;
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}
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/**
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* Check to see if the first element inside an array is an object and on the same line as the node
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* If the node is not an array then it will return false.
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* @param {ASTNode} node node to check
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* @returns {boolean} success/failure
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*/
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function isFirstArrayElementOnSameLine(node) {
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if (node.type === "ArrayExpression" && node.elements[0]) {
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return node.elements[0].loc.start.line === node.loc.start.line && node.elements[0].type === "ObjectExpression";
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} else {
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return false;
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}
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}
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|
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/**
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* Check indent for array block content or object block content
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* @param {ASTNode} node node to examine
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* @returns {void}
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*/
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function checkIndentInArrayOrObjectBlock(node) {
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// Skip inline
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if (isSingleLineNode(node)) {
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return;
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}
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var elements = (node.type === "ArrayExpression") ? node.elements : node.properties;
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// filter out empty elements example would be [ , 2] so remove first element as espree considers it as null
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elements = elements.filter(function(elem) {
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return elem !== null;
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});
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|
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// Skip if first element is in same line with this node
|
|
if (elements.length > 0 && elements[0].loc.start.line === node.loc.start.line) {
|
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return;
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}
|
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|
|
var nodeIndent;
|
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var elementsIndent;
|
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var parentVarNode = getVariableDeclaratorNode(node);
|
|
|
|
// TODO - come up with a better strategy in future
|
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if (isNodeFirstInLine(node)) {
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var parent = node.parent;
|
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var effectiveParent = parent;
|
|
|
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if (parent.type === "MemberExpression") {
|
|
if (isNodeFirstInLine(parent)) {
|
|
effectiveParent = parent.parent.parent;
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|
} else {
|
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effectiveParent = parent.parent;
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|
}
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|
}
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nodeIndent = getNodeIndent(effectiveParent);
|
|
if (parentVarNode && parentVarNode.loc.start.line !== node.loc.start.line) {
|
|
if (parent.type !== "VariableDeclarator" || parentVarNode === parentVarNode.parent.declarations[0]) {
|
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if (parentVarNode.loc.start.line === effectiveParent.loc.start.line) {
|
|
nodeIndent = nodeIndent + (indentSize * options.VariableDeclarator[parentVarNode.parent.kind]);
|
|
} else if (parent.type === "ObjectExpression" || parent.type === "ArrayExpression") {
|
|
nodeIndent = nodeIndent + indentSize;
|
|
}
|
|
}
|
|
} else if (!parentVarNode && !isFirstArrayElementOnSameLine(parent) && effectiveParent.type !== "MemberExpression" && effectiveParent.type !== "ExpressionStatement" && effectiveParent.type !== "AssignmentExpression" && effectiveParent.type !== "Property") {
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nodeIndent = nodeIndent + indentSize;
|
|
}
|
|
|
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elementsIndent = nodeIndent + indentSize;
|
|
|
|
checkFirstNodeLineIndent(node, nodeIndent);
|
|
} else {
|
|
nodeIndent = getNodeIndent(node);
|
|
elementsIndent = nodeIndent + indentSize;
|
|
}
|
|
|
|
// check if the node is a multiple variable declaration, if yes then make sure indentation takes into account
|
|
// variable indentation concept
|
|
if (isNodeInVarOnTop(node, parentVarNode)) {
|
|
elementsIndent += indentSize * options.VariableDeclarator[parentVarNode.parent.kind];
|
|
}
|
|
|
|
// Comma can be placed before property name
|
|
checkNodesIndent(elements, elementsIndent, true);
|
|
|
|
if (elements.length > 0) {
|
|
// Skip last block line check if last item in same line
|
|
if (elements[elements.length - 1].loc.end.line === node.loc.end.line) {
|
|
return;
|
|
}
|
|
}
|
|
|
|
checkLastNodeLineIndent(node, elementsIndent - indentSize);
|
|
}
|
|
|
|
/**
|
|
* Check if the node or node body is a BlockStatement or not
|
|
* @param {ASTNode} node node to test
|
|
* @returns {boolean} True if it or its body is a block statement
|
|
*/
|
|
function isNodeBodyBlock(node) {
|
|
return node.type === "BlockStatement" || (node.body && node.body.type === "BlockStatement") ||
|
|
(node.consequent && node.consequent.type === "BlockStatement");
|
|
}
|
|
|
|
/**
|
|
* Check indentation for blocks
|
|
* @param {ASTNode} node node to check
|
|
* @returns {void}
|
|
*/
|
|
function blockIndentationCheck(node) {
|
|
// Skip inline blocks
|
|
if (isSingleLineNode(node)) {
|
|
return;
|
|
}
|
|
|
|
if (node.parent && (
|
|
node.parent.type === "FunctionExpression" ||
|
|
node.parent.type === "FunctionDeclaration" ||
|
|
node.parent.type === "ArrowFunctionExpression"
|
|
)) {
|
|
checkIndentInFunctionBlock(node);
|
|
return;
|
|
}
|
|
|
|
var indent;
|
|
var nodesToCheck = [];
|
|
|
|
// For this statements we should check indent from statement begin
|
|
// (not from block begin)
|
|
var statementsWithProperties = [
|
|
"IfStatement", "WhileStatement", "ForStatement", "ForInStatement", "ForOfStatement", "DoWhileStatement"
|
|
];
|
|
|
|
if (node.parent && statementsWithProperties.indexOf(node.parent.type) !== -1 && isNodeBodyBlock(node)) {
|
|
indent = getNodeIndent(node.parent);
|
|
} else {
|
|
indent = getNodeIndent(node);
|
|
}
|
|
|
|
if (node.type === "IfStatement" && node.consequent.type !== "BlockStatement") {
|
|
nodesToCheck = [node.consequent];
|
|
} else if (util.isArray(node.body)) {
|
|
nodesToCheck = node.body;
|
|
} else {
|
|
nodesToCheck = [node.body];
|
|
}
|
|
|
|
if (nodesToCheck.length > 0) {
|
|
checkNodesIndent(nodesToCheck, indent + indentSize);
|
|
}
|
|
|
|
if (node.type === "BlockStatement") {
|
|
checkLastNodeLineIndent(node, indent);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Filter out the elements which are on the same line of each other or the node.
|
|
* basically have only 1 elements from each line except the variable declaration line.
|
|
* @param {ASTNode} node Variable declaration node
|
|
* @returns {ASTNode[]} Filtered elements
|
|
*/
|
|
function filterOutSameLineVars(node) {
|
|
return node.declarations.reduce(function(finalCollection, elem) {
|
|
var lastElem = finalCollection[finalCollection.length - 1];
|
|
|
|
if ((elem.loc.start.line !== node.loc.start.line && !lastElem) ||
|
|
(lastElem && lastElem.loc.start.line !== elem.loc.start.line)) {
|
|
finalCollection.push(elem);
|
|
}
|
|
|
|
return finalCollection;
|
|
}, []);
|
|
}
|
|
|
|
/**
|
|
* Check indentation for variable declarations
|
|
* @param {ASTNode} node node to examine
|
|
* @returns {void}
|
|
*/
|
|
function checkIndentInVariableDeclarations(node) {
|
|
var elements = filterOutSameLineVars(node);
|
|
var nodeIndent = getNodeIndent(node);
|
|
var lastElement = elements[elements.length - 1];
|
|
|
|
var elementsIndent = nodeIndent + indentSize * options.VariableDeclarator[node.kind];
|
|
|
|
// Comma can be placed before declaration
|
|
checkNodesIndent(elements, elementsIndent, true);
|
|
|
|
// Only check the last line if there is any token after the last item
|
|
if (context.getLastToken(node).loc.end.line <= lastElement.loc.end.line) {
|
|
return;
|
|
}
|
|
|
|
var tokenBeforeLastElement = context.getTokenBefore(lastElement);
|
|
|
|
if (tokenBeforeLastElement.value === ",") {
|
|
// Special case for comma-first syntax where the semicolon is indented
|
|
checkLastNodeLineIndent(node, getNodeIndent(tokenBeforeLastElement));
|
|
} else {
|
|
checkLastNodeLineIndent(node, elementsIndent - indentSize);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Check and decide whether to check for indentation for blockless nodes
|
|
* Scenarios are for or while statements without braces around them
|
|
* @param {ASTNode} node node to examine
|
|
* @returns {void}
|
|
*/
|
|
function blockLessNodes(node) {
|
|
if (node.body.type !== "BlockStatement") {
|
|
blockIndentationCheck(node);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Returns the expected indentation for the case statement
|
|
* @param {ASTNode} node node to examine
|
|
* @param {int} [switchIndent] indent for switch statement
|
|
* @returns {int} indent size
|
|
*/
|
|
function expectedCaseIndent(node, switchIndent) {
|
|
var switchNode = (node.type === "SwitchStatement") ? node : node.parent;
|
|
var caseIndent;
|
|
|
|
if (caseIndentStore[switchNode.loc.start.line]) {
|
|
return caseIndentStore[switchNode.loc.start.line];
|
|
} else {
|
|
if (typeof switchIndent === "undefined") {
|
|
switchIndent = getNodeIndent(switchNode);
|
|
}
|
|
|
|
if (switchNode.cases.length > 0 && options.SwitchCase === 0) {
|
|
caseIndent = switchIndent;
|
|
} else {
|
|
caseIndent = switchIndent + (indentSize * options.SwitchCase);
|
|
}
|
|
|
|
caseIndentStore[switchNode.loc.start.line] = caseIndent;
|
|
return caseIndent;
|
|
}
|
|
}
|
|
|
|
return {
|
|
"Program": function(node) {
|
|
if (node.body.length > 0) {
|
|
// Root nodes should have no indent
|
|
checkNodesIndent(node.body, getNodeIndent(node));
|
|
}
|
|
},
|
|
|
|
"ClassBody": blockIndentationCheck,
|
|
|
|
"BlockStatement": blockIndentationCheck,
|
|
|
|
"WhileStatement": blockLessNodes,
|
|
|
|
"ForStatement": blockLessNodes,
|
|
|
|
"ForInStatement": blockLessNodes,
|
|
|
|
"ForOfStatement": blockLessNodes,
|
|
|
|
"DoWhileStatement": blockLessNodes,
|
|
|
|
"IfStatement": function(node) {
|
|
if (node.consequent.type !== "BlockStatement" && node.consequent.loc.start.line > node.loc.start.line) {
|
|
blockIndentationCheck(node);
|
|
}
|
|
},
|
|
|
|
"VariableDeclaration": function(node) {
|
|
if (node.declarations[node.declarations.length - 1].loc.start.line > node.declarations[0].loc.start.line) {
|
|
checkIndentInVariableDeclarations(node);
|
|
}
|
|
},
|
|
|
|
"ObjectExpression": function(node) {
|
|
checkIndentInArrayOrObjectBlock(node);
|
|
},
|
|
|
|
"ArrayExpression": function(node) {
|
|
checkIndentInArrayOrObjectBlock(node);
|
|
},
|
|
|
|
"SwitchStatement": function(node) {
|
|
// Switch is not a 'BlockStatement'
|
|
var switchIndent = getNodeIndent(node);
|
|
var caseIndent = expectedCaseIndent(node, switchIndent);
|
|
checkNodesIndent(node.cases, caseIndent);
|
|
|
|
|
|
checkLastNodeLineIndent(node, switchIndent);
|
|
},
|
|
|
|
"SwitchCase": function(node) {
|
|
// Skip inline cases
|
|
if (isSingleLineNode(node)) {
|
|
return;
|
|
}
|
|
var caseIndent = expectedCaseIndent(node);
|
|
checkNodesIndent(node.consequent, caseIndent + indentSize);
|
|
}
|
|
};
|
|
|
|
};
|
|
|
|
module.exports.schema = [
|
|
{
|
|
"oneOf": [
|
|
{
|
|
"enum": ["tab"]
|
|
},
|
|
{
|
|
"type": "integer",
|
|
"minimum": 0
|
|
}
|
|
]
|
|
},
|
|
{
|
|
"type": "object",
|
|
"properties": {
|
|
"SwitchCase": {
|
|
"type": "integer",
|
|
"minimum": 0
|
|
},
|
|
"VariableDeclarator": {
|
|
"oneOf": [
|
|
{
|
|
"type": "integer",
|
|
"minimum": 0
|
|
},
|
|
{
|
|
"type": "object",
|
|
"properties": {
|
|
"var": {
|
|
"type": "integer",
|
|
"minimum": 0
|
|
},
|
|
"let": {
|
|
"type": "integer",
|
|
"minimum": 0
|
|
},
|
|
"const": {
|
|
"type": "integer",
|
|
"minimum": 0
|
|
}
|
|
}
|
|
}
|
|
]
|
|
}
|
|
},
|
|
"additionalProperties": false
|
|
}
|
|
];
|
|
|