'use strict'
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var css = require('css')
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var util = require('./lib/util')
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var validateItem = require('./lib/validator').validate
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var shorthandParser = require('./lib/shorthand-parser')
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/**
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* mergeStyle
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* @param {*} object
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* @param {*} classNames
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* @param {*} preClassNames
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* @param {*} ruleResult
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* @param {*} prop
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* @param {*} index
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*/
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function mergeStyle (object, classNames, preClassNames, ruleResult, prop, index) {
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if (!process.env.UNI_USING_NVUE_STYLE_COMPILER) {
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object[classNames] = object[classNames] || {}
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object[classNames][prop] = ruleResult[prop]
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return
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}
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classNames = classNames.split('.').map(str => '.' + str).slice(1)
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var className = classNames.find(className => className in object) || classNames[0]
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// 假设选择器已经去重简化
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preClassNames += classNames.filter(str => str !== className).sort().join('')
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var rules = object[className] = object[className] || {}
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var style = rules[preClassNames] = rules[preClassNames] || {}
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// 增加其他权重信息
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style[prop] = [...ruleResult[prop], preClassNames.split('.').length - 1, index]
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}
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/**
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* Parse `<style>` code to a JSON Object and log errors & warnings
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*
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* @param {string} code
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* @param {function} done which will be called with
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* - err:Error
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* - data.jsonStyle{}: `classname.propname.value`-like object
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* - data.log[{line, column, reason}]
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*/
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function parse (code, done) {
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var ast, err, jsonStyle = {}, log = []
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// css parse
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ast = css.parse(code, { silent: true })
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// catch syntax error
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if (ast.stylesheet.parsingErrors && ast.stylesheet.parsingErrors.length) {
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err = ast.stylesheet.parsingErrors
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err.forEach(function (error) {
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log.push({ line: error.line, column: error.column, reason: error.toString().replace('Error', 'ERROR') })
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})
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}
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// walk all
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/* istanbul ignore else */
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if (ast && ast.type === 'stylesheet' && ast.stylesheet &&
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ast.stylesheet.rules && ast.stylesheet.rules.length) {
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ast.stylesheet.rules.forEach(function (rule, index) {
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var type = rule.type
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var ruleResult = {}
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var ruleLog = []
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if (type === 'rule') {
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if (rule.declarations && rule.declarations.length) {
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rule.declarations = shorthandParser(rule.declarations)
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rule.declarations.forEach(function (declaration) {
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var subType = declaration.type
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var name, value, line, column, subResult, camelCasedName
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/* istanbul ignore if */
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if (subType !== 'declaration') {
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return
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}
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name = declaration.property
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value = declaration.value
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var newValue = value.replace(/\s*!important/g, '')
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var importantWeight = Number(value !== newValue)
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value = newValue
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// validate declarations and collect them to result
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camelCasedName = util.hyphenedToCamelCase(name)
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subResult = validateItem(camelCasedName, value)
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/* istanbul ignore else */
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if (typeof subResult.value === 'number' || typeof subResult.value === 'string') {
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if (process.env.UNI_USING_NVUE_STYLE_COMPILER) {
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var oldValue = ruleResult[camelCasedName]
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// 增加 important 权重信息
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ruleResult[camelCasedName] = Array.isArray(oldValue) && oldValue[1] > importantWeight ? oldValue : [subResult.value, importantWeight]
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} else {
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ruleResult[camelCasedName] = subResult.value
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}
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}
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if (subResult.log) {
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subResult.log.line = declaration.position.start.line
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subResult.log.column = declaration.position.start.column
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ruleLog.push(subResult.log)
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}
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})
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rule.selectors.forEach(function (selector) {
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selector = selector.replace(/\s*([\+\~\>])\s*/g, '$1').replace(/\s+/, ' ')
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// 支持组合选择器
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const res = selector.match(process.env.UNI_USING_NVUE_STYLE_COMPILER ? /^((?:(?:\.[A-Za-z0-9_\-]+)+[\+\~\> ])*)((?:\.[A-Za-z0-9_\-\:]+)+)$/ : /^(\.)([A-Za-z0-9_\-:]+)$/)
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if (res) {
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var preClassNames = res[1]
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var classNames = res[2]
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// handle pseudo class
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var pseudoIndex = classNames.indexOf(':')
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if (pseudoIndex > -1) {
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var pseudoCls = classNames.slice(pseudoIndex)
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classNames = classNames.slice(0, pseudoIndex)
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var pseudoRuleResult = {}
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Object.keys(ruleResult).forEach(function (prop) {
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pseudoRuleResult[prop + pseudoCls] = ruleResult[prop]
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})
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ruleResult = pseudoRuleResult
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}
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// merge style
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Object.keys(ruleResult).forEach(function (prop) {
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// // handle transition
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// if (prop.indexOf('transition') === 0 && prop !== 'transition') {
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// var realProp = prop.replace('transition', '')
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// realProp = realProp[0].toLowerCase() + realProp.slice(1)
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// var object = jsonStyle['@TRANSITION'] = jsonStyle['@TRANSITION'] || {}
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// mergeStyle(object, classNames, preClassNames, ruleResult, prop, index)
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// }
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mergeStyle(jsonStyle, classNames, preClassNames, ruleResult, prop, index)
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})
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}
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else {
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log.push({
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line: rule.position.start.line,
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column: rule.position.start.column,
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reason: 'ERROR: Selector `' + selector + '` is not supported. Weex only support classname selector'
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})
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}
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})
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log = log.concat(ruleLog)
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}
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}
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/* istanbul ignore else */
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else if (type === 'font-face') {
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/* istanbul ignore else */
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if (rule.declarations && rule.declarations.length) {
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rule.declarations.forEach(function (declaration) {
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/* istanbul ignore if */
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if (declaration.type !== 'declaration') {
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return
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}
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var name = util.hyphenedToCamelCase(declaration.property)
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var value = declaration.value
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if (name === 'fontFamily' && '\"\''.indexOf(value[0]) > -1) { // FIXME: delete leading and trailing quotes
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value = value.slice(1, value.length - 1)
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}
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ruleResult[name] = value
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})
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if (!jsonStyle['@FONT-FACE']) {
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jsonStyle['@FONT-FACE'] = []
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}
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jsonStyle['@FONT-FACE'].push(ruleResult)
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}
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}
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})
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}
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jsonStyle['@VERSION'] = 2
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done(err, { jsonStyle: jsonStyle, log: log })
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}
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/**
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* Validate a JSON Object and log errors & warnings
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*
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* @param {object} json
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* @param {function} done which will be called with
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* - err:Error
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* - data.jsonStyle{}: `classname.propname.value`-like object
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* - data.log[{reason}]
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*/
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function validate (json, done) {
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var log = []
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var err
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try {
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json = JSON.parse(JSON.stringify(json))
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}
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catch (e) {
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err = e
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json = {}
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}
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Object.keys(json).forEach(function (selector) {
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var declarations = json[selector]
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Object.keys(declarations).forEach(function (name) {
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var value = declarations[name]
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var result = validateItem(name, value)
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if (typeof result.value === 'number' || typeof result.value === 'string') {
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declarations[name] = result.value
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}
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else {
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delete declarations[name]
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}
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if (result.log) {
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log.push(result.log)
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}
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})
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})
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done(err, {
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jsonStyle: json,
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log: log
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})
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}
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module.exports = {
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parse: parse,
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validate: validate,
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validateItem: validateItem,
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util: util
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}
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