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var postcss = require('postcss'); | |
var objectAssign = require('object-assign'); | |
var classRepeat = require('class-repeat'); | |
var isPresent = require('is-present'); | |
var hasClass = require('has-class-selector'); | |
require('string.prototype.repeat'); | |
let opts; | |
function specifyByClassRepeat(root) { | |
root.walkRules(function(node) { | |
if (isPresent(node.selectors)) { | |
node.selectors = node.selectors.map(function(selector) { | |
return hasClass(selector) ? classRepeat(selector, opts) : selector; | |
}); | |
} | |
return node; | |
}); | |
} | |
function specifyById(root) { | |
opts.id = opts.id[0] !== '#' ? '#' + opts.id : opts.id; | |
root.walkRules(function(rule) { | |
var isInsideKeyframes = | |
rule.parent.type === 'atrule' && | |
(rule.parent.name === 'keyframes' || | |
rule.parent.name === '-webkit-keyframes' || | |
rule.parent.name === 'webkit-keyframes'); | |
if (!isInsideKeyframes) { | |
increaseSpecifityOfRule(rule, opts); | |
} | |
}); | |
} | |
function increaseSpecifityOfRule(rule, opts) { | |
rule.selectors = rule.selectors.map(function(selector) { | |
if ( | |
selector.includes(':root') || | |
selector === 'html' || | |
selector === 'body' | |
) { | |
return selector; | |
} | |
if (opts.withoutCssLoaderPrefix) { | |
return `:global(${opts.id.repeat(opts.repeat)}) ${selector}`; | |
} | |
return `${opts.id.repeat(opts.repeat)} ${selector}`; | |
}); | |
} | |
const postcssIncreaseSpecificity = postcss.plugin( | |
'postcss-increase-specificity', | |
function(options) { | |
const defaults = { | |
repeat: 2, | |
}; | |
opts = objectAssign({}, defaults, options); | |
let specifyBy = opts.id ? specifyById : specifyByClassRepeat; | |
return specifyBy; | |
} | |
); | |
module.exports = postcssIncreaseSpecificity; |
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