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/**
* @author Yosuke Ota
* See LICENSE file in root directory for full license.
*/
'use strict'
const utils = require('../utils')
module.exports = {
meta: {
type: 'suggestion',
docs: {
description: 'disallow static inline `style` attributes',
category: undefined,
url: 'https://eslint.vuejs.org/rules/no-static-inline-styles.html'
},
fixable: null,
schema: [
{
type: 'object',
properties: {
allowBinding: {
type: 'boolean'
}
},
additionalProperties: false
}
],
messages: {
forbiddenStaticInlineStyle: 'Static inline `style` are forbidden.',
forbiddenStyleAttr: '`style` attributes are forbidden.'
}
},
create (context) {
/**
* Checks whether if the given property node is a static value.
* @param {AssignmentProperty} prop property node to check
* @returns {boolean} `true` if the given property node is a static value.
*/
function isStaticValue (prop) {
return (
!prop.computed &&
prop.value.type === 'Literal' &&
(prop.key.type === 'Identifier' || prop.key.type === 'Literal')
)
}
/**
* Gets the static properties of a given expression node.
* - If `SpreadElement` or computed property exists, it gets only the static properties before it.
* `:style="{ color: 'red', display: 'flex', ...spread, width: '16px' }"`
* ^^^^^^^^^^^^ ^^^^^^^^^^^^^^^
* - If non-static object exists, it gets only the static properties up to that object.
* `:style="[ { color: 'red' }, { display: 'flex', color, width: '16px' }, { height: '16px' } ]"`
* ^^^^^^^^^^^^ ^^^^^^^^^^^^^^^ ^^^^^^^^^^^^^
* - If all properties are static properties, it returns one root node.
* `:style="[ { color: 'red' }, { display: 'flex', width: '16px' } ]"`
* ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
* @param {VAttribute} node `:style` node to check
* @returns {AssignmentProperty[] | [VAttribute]} the static properties.
*/
function getReportNodes (node) {
const { value } = node
if (!value) {
return []
}
const { expression } = value
if (!expression) {
return []
}
let elements
if (expression.type === 'ObjectExpression') {
elements = [expression]
} else if (expression.type === 'ArrayExpression') {
elements = expression.elements
} else {
return []
}
const staticProperties = []
for (const element of elements) {
if (!element) {
continue
}
if (element.type !== 'ObjectExpression') {
return staticProperties
}
let isAllStatic = true
for (const prop of element.properties) {
if (prop.type === 'SpreadElement' || prop.computed) {
// If `SpreadElement` or computed property exists, it gets only the static properties before it.
return staticProperties
}
if (isStaticValue(prop)) {
staticProperties.push(prop)
} else {
isAllStatic = false
}
}
if (!isAllStatic) {
// If non-static object exists, it gets only the static properties up to that object.
return staticProperties
}
}
// If all properties are static properties, it returns one root node.
return [node]
}
/**
* Reports if the value is static.
* @param {VAttribute} node `:style` node to check
*/
function verifyVBindStyle (node) {
for (const n of getReportNodes(node)) {
context.report({
node: n,
messageId: 'forbiddenStaticInlineStyle'
})
}
}
const visitor = {
"VAttribute[directive=false][key.name='style']" (node) {
context.report({
node,
messageId: 'forbiddenStyleAttr'
})
}
}
if (!context.options[0] || !context.options[0].allowBinding) {
visitor[
"VAttribute[directive=true][key.name.name='bind'][key.argument.name='style']"
] = verifyVBindStyle
}
return utils.defineTemplateBodyVisitor(context, visitor)
}
}