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| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 | 102x 54x 54x 1x 1x 53x 53x 54x 54x 1x 1x 52x 2x 2x 50x 54x 2x 2x 48x 1x 1x 47x 54x 54x 54x 5x 1x 4x 4x 42x 47x 47x 9x 47x 4x 5x 5x 4x 4x 47x 54x | import type { DirectiveTransform } from '../transform'
import {
ConstantTypes,
ElementTypes,
type ExpressionNode,
NodeTypes,
type Property,
createCompoundExpression,
createObjectProperty,
createSimpleExpression,
} from '../ast'
import { ErrorCodes, createCompilerError } from '../errors'
import {
hasScopeRef,
isMemberExpression,
isSimpleIdentifier,
isStaticExp,
} from '../utils'
import { IS_REF } from '../runtimeHelpers'
import { BindingTypes } from '../options'
import { camelize } from '@vue/shared'
export const transformModel: DirectiveTransform = (dir, node, context) => {
const { exp, arg } = dir
if (!exp) {
context.onError(
createCompilerError(ErrorCodes.X_V_MODEL_NO_EXPRESSION, dir.loc),
)
return createTransformProps()
}
// we assume v-model directives are always parsed
// (not artificially created by a transform)
const rawExp = exp.loc.source.trim()
const expString =
exp.type === NodeTypes.SIMPLE_EXPRESSION ? exp.content : rawExp
// im SFC <script setup> inline mode, the exp may have been transformed into
// _unref(exp)
const bindingType = context.bindingMetadata[rawExp]
// check props
if (
bindingType === BindingTypes.PROPS ||
bindingType === BindingTypes.PROPS_ALIASED
) {
context.onError(createCompilerError(ErrorCodes.X_V_MODEL_ON_PROPS, exp.loc))
return createTransformProps()
}
// const bindings are not writable.
if (
bindingType === BindingTypes.LITERAL_CONST ||
bindingType === BindingTypes.SETUP_CONST
) {
context.onError(createCompilerError(ErrorCodes.X_V_MODEL_ON_CONST, exp.loc))
return createTransformProps()
}
const maybeRef =
!__BROWSER__ &&
context.inline &&
(bindingType === BindingTypes.SETUP_LET ||
bindingType === BindingTypes.SETUP_REF ||
bindingType === BindingTypes.SETUP_MAYBE_REF)
if (!expString.trim() || (!isMemberExpression(exp, context) && !maybeRef)) {
context.onError(
createCompilerError(ErrorCodes.X_V_MODEL_MALFORMED_EXPRESSION, exp.loc),
)
return createTransformProps()
}
if (
!__BROWSER__ &&
context.prefixIdentifiers &&
isSimpleIdentifier(expString) &&
context.identifiers[expString]
) {
context.onError(
createCompilerError(ErrorCodes.X_V_MODEL_ON_SCOPE_VARIABLE, exp.loc),
)
return createTransformProps()
}
const propName = arg ? arg : createSimpleExpression('modelValue', true)
const eventName = arg
? isStaticExp(arg)
? `onUpdate:${camelize(arg.content)}`
: createCompoundExpression(['"onUpdate:" + ', arg])
: `onUpdate:modelValue`
let assignmentExp: ExpressionNode
const eventArg = context.isTS ? `($event: any)` : `$event`
if (maybeRef) {
if (bindingType === BindingTypes.SETUP_REF) {
// v-model used on known ref.
assignmentExp = createCompoundExpression([
`${eventArg} => ((`,
createSimpleExpression(rawExp, false, exp.loc),
`).value = $event)`,
])
} else {
// v-model used on a potentially ref binding in <script setup> inline mode.
// the assignment needs to check whether the binding is actually a ref.
const altAssignment =
bindingType === BindingTypes.SETUP_LET ? `${rawExp} = $event` : `null`
assignmentExp = createCompoundExpression([
`${eventArg} => (${context.helperString(IS_REF)}(${rawExp}) ? (`,
createSimpleExpression(rawExp, false, exp.loc),
`).value = $event : ${altAssignment})`,
])
}
} else {
assignmentExp = createCompoundExpression([
`${eventArg} => ((`,
exp,
`) = $event)`,
])
}
const props = [
// modelValue: foo
createObjectProperty(propName, dir.exp!),
// "onUpdate:modelValue": $event => (foo = $event)
createObjectProperty(eventName, assignmentExp),
]
// cache v-model handler if applicable (when it doesn't refer any scope vars)
if (
!__BROWSER__ &&
context.prefixIdentifiers &&
!context.inVOnce &&
context.cacheHandlers &&
!hasScopeRef(exp, context.identifiers)
) {
props[1].value = context.cache(props[1].value)
}
// modelModifiers: { foo: true, "bar-baz": true }
if (dir.modifiers.length && node.tagType === ElementTypes.COMPONENT) {
const modifiers = dir.modifiers
.map(m => m.content)
.map(m => (isSimpleIdentifier(m) ? m : JSON.stringify(m)) + `: true`)
.join(`, `)
const modifiersKey = arg
? isStaticExp(arg)
? `${arg.content}Modifiers`
: createCompoundExpression([arg, ' + "Modifiers"'])
: `modelModifiers`
props.push(
createObjectProperty(
modifiersKey,
createSimpleExpression(
`{ ${modifiers} }`,
false,
dir.loc,
ConstantTypes.CAN_CACHE,
),
),
)
}
return createTransformProps(props)
}
function createTransformProps(props: Property[] = []) {
return { props }
}
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