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Diffstat (limited to 'tools/node_modules/eslint/lib/rules/no-mixed-spaces-and-tabs.js')
-rw-r--r-- | tools/node_modules/eslint/lib/rules/no-mixed-spaces-and-tabs.js | 143 |
1 files changed, 143 insertions, 0 deletions
diff --git a/tools/node_modules/eslint/lib/rules/no-mixed-spaces-and-tabs.js b/tools/node_modules/eslint/lib/rules/no-mixed-spaces-and-tabs.js new file mode 100644 index 0000000000..2b8e89d3c8 --- /dev/null +++ b/tools/node_modules/eslint/lib/rules/no-mixed-spaces-and-tabs.js @@ -0,0 +1,143 @@ +/** + * @fileoverview Disallow mixed spaces and tabs for indentation + * @author Jary Niebur + */ +"use strict"; + +//------------------------------------------------------------------------------ +// Rule Definition +//------------------------------------------------------------------------------ + +module.exports = { + meta: { + docs: { + description: "disallow mixed spaces and tabs for indentation", + category: "Stylistic Issues", + recommended: true + }, + + schema: [ + { + enum: ["smart-tabs", true, false] + } + ] + }, + + create(context) { + const sourceCode = context.getSourceCode(); + + let smartTabs; + const ignoredLocs = []; + + switch (context.options[0]) { + case true: // Support old syntax, maybe add deprecation warning here + case "smart-tabs": + smartTabs = true; + break; + default: + smartTabs = false; + } + + /** + * Determines if a given line and column are before a location. + * @param {Location} loc The location object from an AST node. + * @param {int} line The line to check. + * @param {int} column The column to check. + * @returns {boolean} True if the line and column are before the location, false if not. + * @private + */ + function beforeLoc(loc, line, column) { + if (line < loc.start.line) { + return true; + } + return line === loc.start.line && column < loc.start.column; + } + + /** + * Determines if a given line and column are after a location. + * @param {Location} loc The location object from an AST node. + * @param {int} line The line to check. + * @param {int} column The column to check. + * @returns {boolean} True if the line and column are after the location, false if not. + * @private + */ + function afterLoc(loc, line, column) { + if (line > loc.end.line) { + return true; + } + return line === loc.end.line && column > loc.end.column; + } + + //-------------------------------------------------------------------------- + // Public + //-------------------------------------------------------------------------- + + return { + + TemplateElement(node) { + ignoredLocs.push(node.loc); + }, + + "Program:exit"(node) { + + /* + * At least one space followed by a tab + * or the reverse before non-tab/-space + * characters begin. + */ + let regex = /^(?=[\t ]*(\t | \t))/; + const lines = sourceCode.lines, + comments = sourceCode.getAllComments(); + + comments.forEach(comment => { + ignoredLocs.push(comment.loc); + }); + + ignoredLocs.sort((first, second) => { + if (beforeLoc(first, second.start.line, second.start.column)) { + return 1; + } + + if (beforeLoc(second, first.start.line, second.start.column)) { + return -1; + } + + return 0; + }); + + if (smartTabs) { + + /* + * At least one space followed by a tab + * before non-tab/-space characters begin. + */ + regex = /^(?=[\t ]* \t)/; + } + + lines.forEach((line, i) => { + const match = regex.exec(line); + + if (match) { + const lineNumber = i + 1, + column = match.index + 1; + + for (let j = 0; j < ignoredLocs.length; j++) { + if (beforeLoc(ignoredLocs[j], lineNumber, column)) { + continue; + } + if (afterLoc(ignoredLocs[j], lineNumber, column)) { + continue; + } + + return; + } + + context.report({ node, loc: { line: lineNumber, column }, message: "Mixed spaces and tabs." }); + } + }); + } + + }; + + } +}; |