src/platforms/weex/compiler/modules/style.js
/* @flow */
import { cached, camelize, isPlainObject } from 'shared/util'
import { parseText } from 'compiler/parser/text-parser'
import {
getAndRemoveAttr,
getBindingAttr,
baseWarn
} from 'compiler/helpers'
type StaticStyleResult = {
dynamic: boolean,
styleResult: string | Object | void
};
const normalize = cached(camelize)
function transformNode (el: ASTElement, options: CompilerOptions) {
const warn = options.warn || baseWarn
const staticStyle = getAndRemoveAttr(el, 'style')
const { dynamic, styleResult } = parseStaticStyle(staticStyle, options)
if (process.env.NODE_ENV !== 'production' && dynamic) {
warn(
`style="${String(staticStyle)}": ` +
'Interpolation inside attributes has been deprecated. ' +
'Use v-bind or the colon shorthand instead.',
el.rawAttrsMap['style']
)
}
if (!dynamic && styleResult) {
// $flow-disable-line
el.staticStyle = styleResult
}
const styleBinding = getBindingAttr(el, 'style', false /* getStatic */)
if (styleBinding) {
el.styleBinding = styleBinding
} else if (dynamic) {
// $flow-disable-line
el.styleBinding = styleResult
}
}
function genData (el: ASTElement): string {
let data = ''
if (el.staticStyle) {
data += `staticStyle:${el.staticStyle},`
}
if (el.styleBinding) {
data += `style:${el.styleBinding},`
}
return data
}
function parseStaticStyle (staticStyle: ?string, options: CompilerOptions): StaticStyleResult {
// "width: 200px; height: 200px;" -> {width: 200, height: 200}
// "width: 200px; height: {{y}}" -> {width: 200, height: y}
let dynamic = false
let styleResult = ''
if (typeof staticStyle === 'string') {
const styleList = staticStyle.trim().split(';').map(style => {
const result = style.trim().split(':')
if (result.length !== 2) {
return
}
const key = normalize(result[0].trim())
const value = result[1].trim()
const dynamicValue = parseText(value, options.delimiters)
if (dynamicValue) {
dynamic = true
return key + ':' + dynamicValue.expression
}
return key + ':' + JSON.stringify(value)
}).filter(result => result)
if (styleList.length) {
styleResult = '{' + styleList.join(',') + '}'
}
} else if (isPlainObject(staticStyle)) {
styleResult = JSON.stringify(staticStyle) || ''
}
return { dynamic, styleResult }
}
export default {
staticKeys: ['staticStyle'],
transformNode,
genData
}