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68 lines
1.9 KiB
68 lines
1.9 KiB
/**
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* @fileoverview Disallow mixed spaces and tabs for indentation
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* @author Jary Niebur
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* @copyright 2014 Nicholas C. Zakas. All rights reserved.
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* @copyright 2014 Jary Niebur. All rights reserved.
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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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module.exports = function(context) {
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var smartTabs;
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switch (context.options[0]) {
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case true: // Support old syntax, maybe add deprecation warning here
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case "smart-tabs":
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smartTabs = true;
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break;
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default:
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smartTabs = false;
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}
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var COMMENT_START = /^\s*\/\*/,
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MAYBE_COMMENT = /^\s*\*/;
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//--------------------------------------------------------------------------
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// Public
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//--------------------------------------------------------------------------
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return {
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"Program": function(node) {
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/*
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* At least one space followed by a tab
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* or the reverse before non-tab/-space
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* characters begin.
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*/
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var regex = /^(?=[\t ]*(\t | \t))/,
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match,
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lines = context.getSourceLines();
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if (smartTabs) {
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/*
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* At least one space followed by a tab
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* before non-tab/-space characters begin.
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*/
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regex = /^(?=[\t ]* \t)/;
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}
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lines.forEach(function(line, i) {
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match = regex.exec(line);
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if (match) {
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if (!MAYBE_COMMENT.test(line) && !COMMENT_START.test(lines[i - 1])) {
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context.report(node, { line: i + 1, column: match.index + 1 }, "Mixed spaces and tabs.");
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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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