Initial commit

node_modules/stylelint/lib/rules/font-weight-notation/index.js

@@ -0,0 +1,125 @@
+"use strict"
+
+const declarationValueIndex = require("../../utils/declarationValueIndex")
+const isNumbery = require("../../utils/isNumbery")
+const isStandardSyntaxValue = require("../../utils/isStandardSyntaxValue")
+const isVariable = require("../../utils/isVariable")
+const optionsMatches = require("../../utils/optionsMatches")
+const report = require("../../utils/report")
+const ruleMessages = require("../../utils/ruleMessages")
+const validateOptions = require("../../utils/validateOptions")
+const keywordSets = require("../../reference/keywordSets")
+const _ = require("lodash")
+const postcss = require("postcss")
+
+const ruleName = "font-weight-notation"
+
+const messages = ruleMessages(ruleName, {
+  expected: type => `Expected ${type} font-weight notation`,
+  invalidNamed: name => `Unexpected invalid font-weight name "${name}"`,
+})
+
+const INHERIT_KEYWORD = "inherit"
+const INITIAL_KEYWORD = "initial"
+const NORMAL_KEYWORD = "normal"
+const WEIGHTS_WITH_KEYWORD_EQUIVALENTS = [
+  "400",
+  "700",
+]
+
+const rule = function (expectation, options) {
+  return (root, result) => {
+    const validOptions = validateOptions(result, ruleName, {
+      actual: expectation,
+      possible: [
+        "numeric",
+        "named-where-possible",
+      ],
+    }, {
+      actual: options,
+      possible: {
+        ignore: ["relative"],
+      },
+      optional: true,
+    })
+    if (!validOptions) {
+      return
+    }
+
+    root.walkDecls(decl => {
+      if (decl.prop.toLowerCase() === "font-weight") {
+        checkWeight(decl.value, decl)
+      }
+
+      if (decl.prop.toLowerCase() === "font") {
+        checkFont(decl)
+      }
+    })
+
+    function checkFont(decl) {
+      const valueList = postcss.list.space(decl.value)
+      // We do not need to more carefully distinguish font-weight
+      // numbers from unitless line-heights because line-heights in
+      // `font` values need to be part of a font-size/line-height pair
+      const hasNumericFontWeight = valueList.some(isNumbery)
+
+      for (const value of postcss.list.space(decl.value)) {
+        if (value.toLowerCase() === NORMAL_KEYWORD && !hasNumericFontWeight || isNumbery(value) || value.toLowerCase() !== NORMAL_KEYWORD && keywordSets.fontWeightKeywords.has(value.toLowerCase())) {
+          checkWeight(value, decl)
+          return
+        }
+      }
+    }
+
+    function checkWeight(weightValue, decl) {
+      if (!isStandardSyntaxValue(weightValue)) {
+        return
+      }
+      if (isVariable(weightValue)) {
+        return
+      }
+      if (weightValue.toLowerCase() === INHERIT_KEYWORD || weightValue.toLowerCase() === INITIAL_KEYWORD) {
+        return
+      }
+
+      if (optionsMatches(options, "ignore", "relative") && keywordSets.fontWeightRelativeKeywords.has(weightValue.toLowerCase())) {
+        return
+      }
+
+      const weightValueOffset = decl.value.indexOf(weightValue)
+
+      if (expectation === "numeric") {
+        if (!isNumbery(weightValue)) {
+          return complain(messages.expected("numeric"))
+        }
+      }
+
+      if (expectation === "named-where-possible") {
+        if (isNumbery(weightValue)) {
+          if (_.includes(WEIGHTS_WITH_KEYWORD_EQUIVALENTS, weightValue)) {
+            complain(messages.expected("named"))
+          }
+          return
+        }
+        if (!keywordSets.fontWeightKeywords.has(weightValue.toLowerCase()) && weightValue.toLowerCase() !== NORMAL_KEYWORD) {
+          return complain(messages.invalidNamed(weightValue))
+        }
+        return
+      }
+
+      function complain(message) {
+        report({
+          ruleName,
+          result,
+          message,
+          node: decl,
+          index: declarationValueIndex(decl) + weightValueOffset,
+        })
+      }
+    }
+  }
+}
+
+rule.ruleName = ruleName
+rule.messages = messages
+module.exports = rule