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116 lines
2.8 KiB
116 lines
2.8 KiB
const {
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ID,
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C_IS,
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C_REF,
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V_IF,
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V_FOR,
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V_ELSE_IF,
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isVar
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} = require('../util')
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const parseTextExpr = require('./text-parser')
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function parseRef (el, genVar) {
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if (el.ref && isVar(el.ref)) {
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el.ref = genVar(C_REF, el.ref)
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}
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}
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function parseIs (el, genVar) {
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if (!el.component) {
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return
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}
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if (isVar(el.component)) {
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el.component = genVar(C_IS, el.component)
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}
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}
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function isProcessed (exp) {
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return String(exp).indexOf('_$') === 0
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}
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// 当根节点是由if,elseif,else组成，会调用多次parseIf来解析root
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function parseIf (el, createGenVar, isScopedSlot) {
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if (!el.if) {
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return
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}
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if (el.slotTarget && el.tag === 'template') { // new v-slot
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isScopedSlot = false
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}
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el.ifConditions.forEach(con => {
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if (!isProcessed(con.exp) && isVar(con.exp)) {
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con.exp = createGenVar(con.block.attrsMap[ID], isScopedSlot)(con.block.elseif ? V_ELSE_IF : V_IF, con.exp)
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}
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})
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if (!isProcessed(el.if)) {
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el.if = createGenVar(el.attrsMap[ID], isScopedSlot)(V_IF, el.if)
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}
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}
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function parseFor (el, createGenVar, isScopedSlot, fill = false) {
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if (el.for && isVar(el.for)) {
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el.for = createGenVar(el.forId, isScopedSlot)(
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V_FOR,
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fill
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? `{forItems:${el.for},fill:true}`
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: `{forItems:${el.for}}`
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)
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return true
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}
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}
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function parseBinding (el, genVar) {
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el.staticClass && (el.staticClass = genVar('sc', el.staticClass))
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el.classBinding && (el.classBinding = genVar('c', el.classBinding))
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el.styleBinding && (el.styleBinding = genVar('s', el.styleBinding))
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}
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function parseDirs (el, genVar, ignoreDirs = []) {
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el.directives && el.directives.forEach(dir => {
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if (ignoreDirs.indexOf(dir.name) === -1) {
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dir.value && (dir.value = genVar('v-' + dir.name, dir.value))
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dir.isDynamicArg && (dir.arg = genVar('v-' + dir.name + '-arg', dir.arg))
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}
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})
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}
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function parseAttrs (el, genVar) {
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el.attrs && el.attrs.forEach(attr => {
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const {
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name,
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value
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} = attr
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if (
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name !== ID &&
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// name.indexOf('data-') !== 0 && // TODO dataset 保留
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name.indexOf('change:') !== 0 && // wxs change:prop
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isVar(value) &&
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value.indexOf('_$') !== 0 // 已被提前处理过了，如 wxs prop:_$gc(2,'change:prop')
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) {
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attr.value = genVar('a-' + name, value)
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}
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})
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}
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function parseProps (el, genVar) {
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el.props && el.props.forEach(prop => {
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isVar(prop.value) && (prop.value = genVar('a-' + prop.name, prop.value))
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})
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}
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function parseText (el, parent, state) {
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// fixed by xxxxxx 注意：保持平台一致性，trim 一下
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el.parent && (el.parent = parent)
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el.expression = parseTextExpr(el.text.trim(), false, state).expression
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}
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module.exports = {
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parseIs,
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parseRef,
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parseIf,
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parseFor,
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parseText,
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parseDirs,
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parseAttrs,
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parseProps,
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parseBinding
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}
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