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/**
* @fileoverview Enforces or disallows a space beginning a single-line comment.
* @author Greg Cochard
* @copyright 2014 Greg Cochard. All rights reserved.
*/
"use strict";
//------------------------------------------------------------------------------
// Rule Definition
//------------------------------------------------------------------------------
module.exports = function(context) {
// Unless the first option is never, require a space
var requireSpace = context.options[0] !== "never";
// Default to match anything, so all will fail if there are no exceptions
var exceptionMatcher = new RegExp(" ");
// Grab the exceptions array and build a RegExp matcher for it
var hasExceptions = context.options.length === 2;
var unescapedExceptions = hasExceptions ? context.options[1].exceptions : [];
var exceptions;
if (unescapedExceptions.length) {
exceptions = unescapedExceptions.map(function(s) {
return s.replace(/([.*+?${}()|\^\[\]\/\\])/g, "\\$1");
});
exceptionMatcher = new RegExp("(^(" + exceptions.join(")+$)|(^(") + ")+$)");
}
//--------------------------------------------------------------------------
// Public
//--------------------------------------------------------------------------
return {
"LineComment": function checkCommentForSpace(node) {
if (requireSpace) {
// If length is zero, ignore it
if (node.value.length === 0) {
return;
}
// Space expected and not found
if (node.value.indexOf(" ") !== 0 && node.value.indexOf("\t") !== 0) {
/*
* Do two tests; one for space starting the line,
* and one for a comment comprised only of exceptions
*/
if (hasExceptions && !exceptionMatcher.test(node.value)) {
context.report(node, "Expected exception block, space or tab after // in comment.");
} else if (!hasExceptions) {
context.report(node, "Expected space or tab after // in comment.");
}
}
} else {
if (node.value.indexOf(" ") === 0 || node.value.indexOf("\t") === 0) {
context.report(node, "Unexpected space or tab after // in comment.");
}
}
}
};
};
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