| "use strict"; |
| |
| const addEmptyLineBefore = require("../../utils/addEmptyLineBefore"); |
| const getPreviousNonSharedLineCommentNode = require("../../utils/getPreviousNonSharedLineCommentNode"); |
| const hasEmptyLine = require("../../utils/hasEmptyLine"); |
| const isAfterSingleLineComment = require("../../utils/isAfterSingleLineComment"); |
| const isFirstNested = require("../../utils/isFirstNested"); |
| const isFirstNodeOfRoot = require("../../utils/isFirstNodeOfRoot"); |
| const isSingleLineString = require("../../utils/isSingleLineString"); |
| const isStandardSyntaxRule = require("../../utils/isStandardSyntaxRule"); |
| const optionsMatches = require("../../utils/optionsMatches"); |
| const removeEmptyLinesBefore = require("../../utils/removeEmptyLinesBefore"); |
| const report = require("../../utils/report"); |
| const ruleMessages = require("../../utils/ruleMessages"); |
| const validateOptions = require("../../utils/validateOptions"); |
| |
| const ruleName = "rule-empty-line-before"; |
| |
| const messages = ruleMessages(ruleName, { |
| expected: "Expected empty line before rule", |
| rejected: "Unexpected empty line before rule" |
| }); |
| |
| const rule = function(expectation, options, context) { |
| return (root, result) => { |
| const validOptions = validateOptions( |
| result, |
| ruleName, |
| { |
| actual: expectation, |
| possible: ["always", "never", "always-multi-line", "never-multi-line"] |
| }, |
| { |
| actual: options, |
| possible: { |
| ignore: ["after-comment", "first-nested", "inside-block"], |
| except: [ |
| "after-rule", |
| "after-single-line-comment", |
| "first-nested", |
| "inside-block-and-after-rule", |
| "inside-block" |
| ] |
| }, |
| optional: true |
| } |
| ); |
| |
| if (!validOptions) { |
| return; |
| } |
| |
| root.walkRules(rule => { |
| if (!isStandardSyntaxRule(rule)) { |
| return; |
| } |
| |
| // Ignore the first node |
| if (isFirstNodeOfRoot(rule)) { |
| return; |
| } |
| |
| // Optionally ignore the expectation if a comment precedes this node |
| if ( |
| optionsMatches(options, "ignore", "after-comment") && |
| rule.prev() && |
| rule.prev().type === "comment" |
| ) { |
| return; |
| } |
| |
| // Optionally ignore the node if it is the first nested |
| if ( |
| optionsMatches(options, "ignore", "first-nested") && |
| isFirstNested(rule) |
| ) { |
| return; |
| } |
| |
| const isNested = rule.parent.type !== "root"; |
| |
| // Optionally ignore the expectation if inside a block |
| if (optionsMatches(options, "ignore", "inside-block") && isNested) { |
| return; |
| } |
| |
| // Ignore if the expectation is for multiple and the rule is single-line |
| if ( |
| expectation.indexOf("multi-line") !== -1 && |
| isSingleLineString(rule.toString()) |
| ) { |
| return; |
| } |
| |
| let expectEmptyLineBefore = |
| expectation.indexOf("always") !== -1 ? true : false; |
| |
| // Optionally reverse the expectation if any exceptions apply |
| if ( |
| (optionsMatches(options, "except", "first-nested") && |
| isFirstNested(rule)) || |
| (optionsMatches(options, "except", "after-rule") && |
| isAfterRule(rule)) || |
| (optionsMatches(options, "except", "inside-block-and-after-rule") && |
| isNested && |
| isAfterRule(rule)) || |
| (optionsMatches(options, "except", "after-single-line-comment") && |
| isAfterSingleLineComment(rule)) || |
| (optionsMatches(options, "except", "inside-block") && isNested) |
| ) { |
| expectEmptyLineBefore = !expectEmptyLineBefore; |
| } |
| |
| const hasEmptyLineBefore = hasEmptyLine(rule.raws.before); |
| |
| // Return if the expectation is met |
| if (expectEmptyLineBefore === hasEmptyLineBefore) { |
| return; |
| } |
| |
| // Fix |
| if (context.fix) { |
| if (expectEmptyLineBefore) { |
| addEmptyLineBefore(rule, context.newline); |
| } else { |
| removeEmptyLinesBefore(rule, context.newline); |
| } |
| |
| return; |
| } |
| |
| const message = expectEmptyLineBefore |
| ? messages.expected |
| : messages.rejected; |
| |
| report({ |
| message, |
| node: rule, |
| result, |
| ruleName |
| }); |
| }); |
| }; |
| }; |
| |
| function isAfterRule(rule) { |
| const prevNode = getPreviousNonSharedLineCommentNode(rule); |
| |
| return prevNode && prevNode.type === "rule"; |
| } |
| |
| rule.ruleName = ruleName; |
| rule.messages = messages; |
| module.exports = rule; |