Blame view
node_modules/eslint/lib/rules/operator-linebreak.js
5.03 KB
c39994410
wip converting to...
|
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 |
/**
* @fileoverview Operator linebreak - enforces operator linebreak style of two types: after and before
* @author Benoît Zugmeyer
* @copyright 2015 Benoît Zugmeyer. All rights reserved.
*/
"use strict";
var assign = require("object-assign"),
astUtils = require("../ast-utils");
//------------------------------------------------------------------------------
// Rule Definition
//------------------------------------------------------------------------------
module.exports = function(context) {
var usedDefaultGlobal = !context.options[0];
var globalStyle = context.options[0] || "after";
var options = context.options[1] || {};
var styleOverrides = options.overrides ? assign({}, options.overrides) : {};
if (usedDefaultGlobal && !styleOverrides["?"]) {
styleOverrides["?"] = "before";
}
if (usedDefaultGlobal && !styleOverrides[":"]) {
styleOverrides[":"] = "before";
}
//--------------------------------------------------------------------------
// Helpers
//--------------------------------------------------------------------------
/**
* Checks the operator placement
* @param {ASTNode} node The node to check
* @param {ASTNode} leftSide The node that comes before the operator in `node`
* @private
* @returns {void}
*/
function validateNode(node, leftSide) {
var leftToken = context.getLastToken(leftSide);
var operatorToken = context.getTokenAfter(leftToken);
// When the left part of a binary expression is a single expression wrapped in
// parentheses (ex: `(a) + b`), leftToken will be the last token of the expression
// and operatorToken will be the closing parenthesis.
// The leftToken should be the last closing parenthesis, and the operatorToken
// should be the token right after that.
while (operatorToken.value === ")") {
leftToken = operatorToken;
operatorToken = context.getTokenAfter(operatorToken);
}
var rightToken = context.getTokenAfter(operatorToken);
var operator = operatorToken.value;
var style = styleOverrides[operator] || globalStyle;
// if single line
if (astUtils.isTokenOnSameLine(leftToken, operatorToken) &&
astUtils.isTokenOnSameLine(operatorToken, rightToken)) {
return;
} else if (!astUtils.isTokenOnSameLine(leftToken, operatorToken) &&
!astUtils.isTokenOnSameLine(operatorToken, rightToken)) {
// lone operator
context.report(node, {
line: operatorToken.loc.end.line,
column: operatorToken.loc.end.column
}, "Bad line breaking before and after '" + operator + "'.");
} else if (style === "before" && astUtils.isTokenOnSameLine(leftToken, operatorToken)) {
context.report(node, {
line: operatorToken.loc.end.line,
column: operatorToken.loc.end.column
}, "'" + operator + "' should be placed at the beginning of the line.");
} else if (style === "after" && astUtils.isTokenOnSameLine(operatorToken, rightToken)) {
context.report(node, {
line: operatorToken.loc.end.line,
column: operatorToken.loc.end.column
}, "'" + operator + "' should be placed at the end of the line.");
} else if (style === "none") {
context.report(node, {
line: operatorToken.loc.end.line,
column: operatorToken.loc.end.column
}, "There should be no line break before or after '" + operator + "'");
}
}
/**
* Validates a binary expression using `validateNode`
* @param {BinaryExpression|LogicalExpression|AssignmentExpression} node node to be validated
* @returns {void}
*/
function validateBinaryExpression(node) {
validateNode(node, node.left);
}
//--------------------------------------------------------------------------
// Public
//--------------------------------------------------------------------------
return {
"BinaryExpression": validateBinaryExpression,
"LogicalExpression": validateBinaryExpression,
"AssignmentExpression": validateBinaryExpression,
"VariableDeclarator": function(node) {
if (node.init) {
validateNode(node, node.id);
}
},
"ConditionalExpression": function(node) {
validateNode(node, node.test);
validateNode(node, node.consequent);
}
};
};
module.exports.schema = [
{
"enum": ["after", "before", "none", null]
},
{
"type": "object",
"properties": {
"overrides": {
"type": "object",
"properties": {
"anyOf": {
"type": "string",
"enum": ["after", "before", "none"]
}
}
}
},
"additionalProperties": false
}
];
|