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