.config/coc/extensions/node_modules/coc-prettier/node_modules/eslint/lib/rules/no-mixed-spaces-and-tabs.js

   1 /**
   2  * @fileoverview Disallow mixed spaces and tabs for indentation
   3  * @author Jary Niebur
   4  */
   5 "use strict";
   6
   7 //------------------------------------------------------------------------------
   8 // Rule Definition
   9 //------------------------------------------------------------------------------
  10
  11 module.exports = {
  12     meta: {
  13         type: "layout",
  14
  15         docs: {
  16             description: "disallow mixed spaces and tabs for indentation",
  17             category: "Stylistic Issues",
  18             recommended: true,
  19             url: "https://eslint.org/docs/rules/no-mixed-spaces-and-tabs"
  20         },
  21
  22         schema: [
  23             {
  24                 enum: ["smart-tabs", true, false]
  25             }
  26         ],
  27
  28         messages: {
  29             mixedSpacesAndTabs: "Mixed spaces and tabs."
  30         }
  31     },
  32
  33     create(context) {
  34         const sourceCode = context.getSourceCode();
  35
  36         let smartTabs;
  37
  38         switch (context.options[0]) {
  39             case true: // Support old syntax, maybe add deprecation warning here
  40             case "smart-tabs":
  41                 smartTabs = true;
  42                 break;
  43             default:
  44                 smartTabs = false;
  45         }
  46
  47         //--------------------------------------------------------------------------
  48         // Public
  49         //--------------------------------------------------------------------------
  50
  51         return {
  52
  53             "Program:exit"(node) {
  54                 const lines = sourceCode.lines,
  55                     comments = sourceCode.getAllComments(),
  56                     ignoredCommentLines = new Set();
  57
  58                 // Add all lines except the first ones.
  59                 comments.forEach(comment => {
  60                     for (let i = comment.loc.start.line + 1; i <= comment.loc.end.line; i++) {
  61                         ignoredCommentLines.add(i);
  62                     }
  63                 });
  64
  65                 /*
  66                  * At least one space followed by a tab
  67                  * or the reverse before non-tab/-space
  68                  * characters begin.
  69                  */
  70                 let regex = /^(?=( +|\t+))\1(?:\t| )/u;
  71
  72                 if (smartTabs) {
  73
  74                     /*
  75                      * At least one space followed by a tab
  76                      * before non-tab/-space characters begin.
  77                      */
  78                     regex = /^(?=(\t*))\1(?=( +))\2\t/u;
  79                 }
  80
  81                 lines.forEach((line, i) => {
  82                     const match = regex.exec(line);
  83
  84                     if (match) {
  85                         const lineNumber = i + 1;
  86                         const loc = {
  87                             start: {
  88                                 line: lineNumber,
  89                                 column: match[0].length - 2
  90                             },
  91                             end: {
  92                                 line: lineNumber,
  93                                 column: match[0].length
  94                             }
  95                         };
  96
  97                         if (!ignoredCommentLines.has(lineNumber)) {
  98                             const containingNode = sourceCode.getNodeByRangeIndex(sourceCode.getIndexFromLoc(loc.start));
  99
 100                             if (!(containingNode && ["Literal", "TemplateElement"].includes(containingNode.type))) {
 101                                 context.report({
 102                                     node,
 103                                     loc,
 104                                     messageId: "mixedSpacesAndTabs"
 105                                 });
 106                             }
 107                         }
 108                     }
 109                 });
 110             }
 111         };
 112     }
 113 };