1 | /**
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2 | * @fileoverview Source code for spaced-comments rule
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3 | * @author Gyandeep Singh
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4 | * @copyright 2015 Toru Nagashima. All rights reserved.
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5 | * @copyright 2015 Gyandeep Singh. All rights reserved.
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6 | * @copyright 2014 Greg Cochard. All rights reserved.
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7 | */
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8 | ;
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9 |
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10 | var escapeStringRegexp = require("escape-string-regexp");
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11 |
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12 | //------------------------------------------------------------------------------
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13 | // Helpers
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14 | //------------------------------------------------------------------------------
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15 |
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16 | /**
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17 | * Escapes the control characters of a given string.
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18 | * @param {string} s - A string to escape.
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19 | * @returns {string} An escaped string.
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20 | */
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21 | function escape(s) {
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22 | var isOneChar = s.length === 1;
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23 | s = escapeStringRegexp(s);
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24 | return isOneChar ? s : "(?:" + s + ")";
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25 | }
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26 |
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27 | /**
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28 | * Escapes the control characters of a given string.
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29 | * And adds a repeat flag.
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30 | * @param {string} s - A string to escape.
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31 | * @returns {string} An escaped string.
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32 | */
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33 | function escapeAndRepeat(s) {
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34 | return escape(s) + "+";
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35 | }
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36 |
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37 | /**
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38 | * Parses `markers` option.
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39 | * If markers don't include `"*"`, this adds `"*"` to allow JSDoc comments.
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40 | * @param {string[]} [markers] - A marker list.
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41 | * @returns {string[]} A marker list.
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42 | */
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43 | function parseMarkersOption(markers) {
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44 | markers = markers ? markers.slice(0) : [];
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45 |
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46 | // `*` is a marker for JSDoc comments.
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47 | if (markers.indexOf("*") === -1) {
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48 | markers.push("*");
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49 | }
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50 |
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51 | return markers;
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52 | }
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53 |
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54 | /**
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55 | * Creates RegExp object for `always` mode.
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56 | * Generated pattern is below:
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57 | *
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58 | * 1. First, a marker or nothing.
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59 | * 2. Next, a space or an exception pattern sequence.
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60 | *
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61 | * @param {string[]} markers - A marker list.
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62 | * @param {string[]} exceptions - A exception pattern list.
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63 | * @returns {RegExp} A RegExp object for `always` mode.
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64 | */
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65 | function createAlwaysStylePattern(markers, exceptions) {
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66 | var pattern = "^";
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67 |
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68 | // A marker or nothing.
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69 | // ["*"] ==> "\*?"
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70 | // ["*", "!"] ==> "(?:\*|!)?"
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71 | // ["*", "/", "!<"] ==> "(?:\*|\/|(?:!<))?" ==> https://jex.im/regulex/#!embed=false&flags=&re=(%3F%3A%5C*%7C%5C%2F%7C(%3F%3A!%3C))%3F
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72 | if (markers.length === 1) {
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73 | // the marker.
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74 | pattern += escape(markers[0]);
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75 | } else {
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76 | // one of markers.
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77 | pattern += "(?:";
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78 | pattern += markers.map(escape).join("|");
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79 | pattern += ")";
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80 | }
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81 | pattern += "?"; // or nothing.
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82 |
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83 | // A space or an exception pattern sequence.
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84 | // [] ==> "\s"
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85 | // ["-"] ==> "(?:\s|\-+$)"
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86 | // ["-", "="] ==> "(?:\s|(?:\-+|=+)$)"
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87 | // ["-", "=", "--=="] ==> "(?:\s|(?:\-+|=+|(?:\-\-==)+)$)" ==> https://jex.im/regulex/#!embed=false&flags=&re=(%3F%3A%5Cs%7C(%3F%3A%5C-%2B%7C%3D%2B%7C(%3F%3A%5C-%5C-%3D%3D)%2B)%24)
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88 | if (exceptions.length === 0) {
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89 | // a space.
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90 | pattern += "\\s";
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91 | } else {
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92 | // a space or...
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93 | pattern += "(?:\\s|";
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94 | if (exceptions.length === 1) {
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95 | // a sequence of the exception pattern.
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96 | pattern += escapeAndRepeat(exceptions[0]);
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97 | } else {
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98 | // a sequence of one of exception patterns.
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99 | pattern += "(?:";
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100 | pattern += exceptions.map(escapeAndRepeat).join("|");
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101 | pattern += ")";
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102 | }
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103 | pattern += "(?:$|[\n\r]))"; // the sequence continues until the end.
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104 | }
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105 | return new RegExp(pattern);
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106 | }
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107 |
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108 | /**
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109 | * Creates RegExp object for `never` mode.
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110 | * Generated pattern is below:
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111 | *
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112 | * 1. First, a marker or nothing (captured).
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113 | * 2. Next, a space or a tab.
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114 | *
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115 | * @param {string[]} markers - A marker list.
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116 | * @returns {RegExp} A RegExp object for `never` mode.
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117 | */
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118 | function createNeverStylePattern(markers) {
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119 | var pattern = "^(" + markers.map(escape).join("|") + ")?[ \t]+";
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120 | return new RegExp(pattern);
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121 | }
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122 |
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123 | //------------------------------------------------------------------------------
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124 | // Rule Definition
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125 | //------------------------------------------------------------------------------
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126 |
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127 | module.exports = function(context) {
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128 | // Unless the first option is never, require a space
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129 | var requireSpace = context.options[0] !== "never";
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130 |
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131 | // Parse the second options.
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132 | // If markers don't include `"*"`, it's added automatically for JSDoc comments.
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133 | var config = context.options[1] || {};
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134 | var styleRules = ["block", "line"].reduce(function(rule, type) {
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135 | var markers = parseMarkersOption(config[type] && config[type].markers || config.markers);
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136 | var exceptions = config[type] && config[type].exceptions || config.exceptions || [];
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137 |
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138 | // Create RegExp object for valid patterns.
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139 | rule[type] = {
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140 | regex: requireSpace ? createAlwaysStylePattern(markers, exceptions) : createNeverStylePattern(markers),
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141 | hasExceptions: exceptions.length > 0,
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142 | markers: new RegExp("^(" + markers.map(escape).join("|") + ")")
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143 | };
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144 |
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145 | return rule;
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146 | }, {});
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147 |
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148 | /**
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149 | * Reports a spacing error with an appropriate message.
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150 | * @param {ASTNode} node - A comment node to check.
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151 | * @param {string} message - An error message to report
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152 | * @param {Array} match - An array of match results for markers.
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153 | * @returns {void}
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154 | */
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155 | function report(node, message, match) {
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156 | var type = node.type.toLowerCase(),
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157 | commentIdentifier = type === "block" ? "/*" : "//";
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158 |
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159 | context.report({
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160 | node: node,
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161 | fix: function(fixer) {
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162 | var start = node.range[0],
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163 | end = start + 2;
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164 |
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165 | if (requireSpace) {
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166 | if (match) {
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167 | end += match[0].length;
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168 | }
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169 | return fixer.insertTextAfterRange([start, end], " ");
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170 | } else {
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171 | end += match[0].length;
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172 | return fixer.replaceTextRange([start, end], commentIdentifier + (match[1] ? match[1] : ""));
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173 | }
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174 | },
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175 | message: message
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176 | });
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177 | }
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178 |
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179 | /**
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180 | * Reports a given comment if it's invalid.
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181 | * @param {ASTNode} node - a comment node to check.
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182 | * @returns {void}
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183 | */
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184 | function checkCommentForSpace(node) {
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185 | var type = node.type.toLowerCase(),
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186 | rule = styleRules[type],
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187 | commentIdentifier = type === "block" ? "/*" : "//";
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188 |
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189 | // Ignores empty comments.
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190 | if (node.value.length === 0) {
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191 | return;
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192 | }
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193 |
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194 | // Checks.
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195 | if (requireSpace) {
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196 | if (!rule.regex.test(node.value)) {
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197 | var hasMarker = rule.markers.exec(node.value);
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198 | var marker = hasMarker ? commentIdentifier + hasMarker[0] : commentIdentifier;
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199 | if (rule.hasExceptions) {
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200 | report(node, "Expected exception block, space or tab after '" + marker + "' in comment.", hasMarker);
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201 | } else {
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202 | report(node, "Expected space or tab after '" + marker + "' in comment.", hasMarker);
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203 | }
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204 | }
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205 | } else {
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206 | var matched = rule.regex.exec(node.value);
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207 | if (matched) {
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208 | if (!matched[1]) {
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209 | report(node, "Unexpected space or tab after '" + commentIdentifier + "' in comment.", matched);
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210 | } else {
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211 | report(node, "Unexpected space or tab after marker (" + matched[1] + ") in comment.", matched);
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212 | }
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213 | }
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214 | }
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215 | }
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216 |
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217 | return {
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218 |
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219 | "LineComment": checkCommentForSpace,
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220 | "BlockComment": checkCommentForSpace
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221 |
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222 | };
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223 | };
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224 |
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225 | module.exports.schema = [
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226 | {
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227 | "enum": ["always", "never"]
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228 | },
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229 | {
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230 | "type": "object",
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231 | "properties": {
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232 | "exceptions": {
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233 | "type": "array",
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234 | "items": {
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235 | "type": "string"
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236 | }
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237 | },
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238 | "markers": {
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239 | "type": "array",
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240 | "items": {
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241 | "type": "string"
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242 | }
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243 | },
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244 | "line": {
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245 | "type": "object",
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246 | "properties": {
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247 | "exceptions": {
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248 | "type": "array",
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249 | "items": {
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250 | "type": "string"
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251 | }
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252 | },
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253 | "markers": {
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254 | "type": "array",
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255 | "items": {
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256 | "type": "string"
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257 | }
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258 | }
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259 | },
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260 | "additionalProperties": false
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261 | },
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262 | "block": {
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263 | "type": "object",
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264 | "properties": {
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265 | "exceptions": {
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266 | "type": "array",
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267 | "items": {
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268 | "type": "string"
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269 | }
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270 | },
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271 | "markers": {
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272 | "type": "array",
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273 | "items": {
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274 | "type": "string"
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275 | }
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276 | }
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277 | },
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278 | "additionalProperties": false
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279 | }
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280 | },
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281 | "additionalProperties": false
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282 | }
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283 | ];
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