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node_modules/stylelint/lib/rules/max-empty-lines/README.md

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+# max-empty-lines
+
+Limit the number of adjacent empty lines.
+
+```css
+a {}
+     /* ← */
+     /* ← */
+a {} /* ↑ */
+/**     ↑
+ * These lines */
+```
+
+## Options
+
+`int`: Maximum number of characters allowed.
+
+For example, with `2`:
+
+The following patterns are considered warnings:
+
+```css
+a {}
+
+
+
+b {}
+```
+
+Comment strings are also checked -- so the following is a warning:
+
+```css
+/**
+ * Call me Ishmael.
+ *
+ *
+ *
+ * Some years ago -- never mind how log precisely -- ...
+ */
+```
+
+The following patterns are *not* considered warnings:
+
+```css
+a {}
+b {}
+```
+
+```css
+a {}
+
+b {}
+```
+
+```css
+a {}
+
+
+b {}
+```

node_modules/stylelint/lib/rules/max-empty-lines/index.js

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+"use strict"
+
+const _ = require("lodash")
+const report = require("../../utils/report")
+const ruleMessages = require("../../utils/ruleMessages")
+const validateOptions = require("../../utils/validateOptions")
+const styleSearch = require("style-search")
+
+const ruleName = "max-empty-lines"
+
+const messages = ruleMessages(ruleName, {
+  expected: max => `Expected no more than ${max} empty line(s)`,
+})
+
+const rule = function (max) {
+  const maxAdjacentNewlines = max + 1
+
+  return (root, result) => {
+    const validOptions = validateOptions(result, ruleName, {
+      actual: max,
+      possible: _.isNumber,
+    })
+    if (!validOptions) {
+      return
+    }
+
+    const rootString = root.toString()
+    const repeatLFNewLines = _.repeat("\n", maxAdjacentNewlines)
+    const repeatCRLFNewLines = _.repeat("\r\n", maxAdjacentNewlines)
+
+    styleSearch({ source: rootString, target: "\n" }, match => {
+      checkMatch(rootString, match.endIndex, root)
+    })
+
+    // We must check comments separately in order to accommodate stupid
+    // `//`-comments from SCSS, which postcss-scss converts to `/* ... */`,
+    // which adds to extra characters at the end, which messes up our
+    // warning position
+    root.walkComments(comment => {
+      const source = (comment.raws.left || "") + comment.text + (comment.raws.right || "")
+      styleSearch({ source, target: "\n" }, match => {
+        checkMatch(source, match.endIndex, comment, 2)
+      })
+    })
+
+    function checkMatch(source, matchEndIndex, node) {
+      const offset = arguments.length > 3 && arguments[3] !== undefined ? arguments[3] : 0
+
+      let violationIndex = false
+      if (source.substr(matchEndIndex, maxAdjacentNewlines) === repeatLFNewLines) {
+        violationIndex = matchEndIndex + maxAdjacentNewlines
+      } else if (source.substr(matchEndIndex, maxAdjacentNewlines * 2) === repeatCRLFNewLines) {
+        violationIndex = matchEndIndex + maxAdjacentNewlines * 2
+      }
+
+      if (!violationIndex) {
+        return
+      }
+
+      report({
+        message: messages.expected(max),
+        node,
+        index: violationIndex + offset,
+        result,
+        ruleName,
+      })
+    }
+  }
+}
+
+rule.ruleName = ruleName
+rule.messages = messages
+module.exports = rule