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DOMErrorCodes,
type DirectiveTransform,
ElementTypes,
type ExpressionNode,
NodeTypes,
type PlainElementNode,
createCallExpression,
createConditionalExpression,
createDOMCompilerError,
createInterpolation,
createObjectProperty,
createSimpleExpression,
findProp,
hasDynamicKeyVBind,
transformModel,
} from '@vue/compiler-dom'
import {
SSR_INCLUDE_BOOLEAN_ATTR,
SSR_LOOSE_CONTAIN,
SSR_LOOSE_EQUAL,
SSR_RENDER_DYNAMIC_MODEL,
} from '../runtimeHelpers'
import type { DirectiveTransformResult } from 'packages/compiler-core/src/transform'
export const ssrTransformModel: DirectiveTransform = (dir, node, context) => {
const model = dir.exp!
function checkDuplicatedValue() {
const value = findProp(node, 'value')
if (value) {
context.onError(
createDOMCompilerError(
DOMErrorCodes.X_V_MODEL_UNNECESSARY_VALUE,
value.loc,
),
)
}
}
function processOption(plainNode: PlainElementNode) {
if (plainNode.tag === 'option') {
if (plainNode.props.findIndex(p => p.name === 'selected') === -1) {
const value = findValueBinding(plainNode)
plainNode.ssrCodegenNode!.elements.push(
createConditionalExpression(
createCallExpression(context.helper(SSR_INCLUDE_BOOLEAN_ATTR), [
createConditionalExpression(
createCallExpression(`Array.isArray`, [model]),
createCallExpression(context.helper(SSR_LOOSE_CONTAIN), [
model,
value,
]),
createCallExpression(context.helper(SSR_LOOSE_EQUAL), [
model,
value,
]),
),
]),
createSimpleExpression(' selected', true),
createSimpleExpression('', true),
false /* no newline */,
),
)
}
} else if (plainNode.tag === 'optgroup') {
plainNode.children.forEach(option =>
processOption(option as PlainElementNode),
)
}
}
if (node.tagType === ElementTypes.ELEMENT) {
const res: DirectiveTransformResult = { props: [] }
const defaultProps = [
// default value binding for text type inputs
createObjectProperty(`value`, model),
]
if (node.tag === 'input') {
const type = findProp(node, 'type')
if (type) {
const value = findValueBinding(node)
if (type.type === NodeTypes.DIRECTIVE) {
// dynamic type
res.ssrTagParts = [
createCallExpression(context.helper(SSR_RENDER_DYNAMIC_MODEL), [
type.exp!,
model,
value,
]),
]
} else if (type.value) {
// static type
switch (type.value.content) {
case 'radio':
res.props = [
createObjectProperty(
`checked`,
createCallExpression(context.helper(SSR_LOOSE_EQUAL), [
model,
value,
]),
),
]
break
case 'checkbox':
const trueValueBinding = findProp(node, 'true-value')
if (trueValueBinding) {
const trueValue =
trueValueBinding.type === NodeTypes.ATTRIBUTE
? JSON.stringify(trueValueBinding.value!.content)
: trueValueBinding.exp!
res.props = [
createObjectProperty(
`checked`,
createCallExpression(context.helper(SSR_LOOSE_EQUAL), [
model,
trueValue,
]),
),
]
} else {
res.props = [
createObjectProperty(
`checked`,
createConditionalExpression(
createCallExpression(`Array.isArray`, [model]),
createCallExpression(context.helper(SSR_LOOSE_CONTAIN), [
model,
value,
]),
model,
),
),
]
}
break
case 'file':
context.onError(
createDOMCompilerError(
DOMErrorCodes.X_V_MODEL_ON_FILE_INPUT_ELEMENT,
dir.loc,
),
)
break
default:
checkDuplicatedValue()
res.props = defaultProps
break
}
}
} else if (hasDynamicKeyVBind(node)) {
// dynamic type due to dynamic v-bind
// NOOP, handled in ssrTransformElement due to need to rewrite
// the entire props expression
} else {
// text type
checkDuplicatedValue()
res.props = defaultProps
}
} else if (node.tag === 'textarea') {
checkDuplicatedValue()
node.children = [createInterpolation(model, model.loc)]
} else if (node.tag === 'select') {
node.children.forEach(child => {
if (child.type === NodeTypes.ELEMENT) {
processOption(child as PlainElementNode)
}
})
} else {
context.onError(
createDOMCompilerError(
DOMErrorCodes.X_V_MODEL_ON_INVALID_ELEMENT,
dir.loc,
),
)
}
return res
} else {
// component v-model
return transformModel(dir, node, context)
}
}
function findValueBinding(node: PlainElementNode): ExpressionNode {
const valueBinding = findProp(node, 'value')
return valueBinding
? valueBinding.type === NodeTypes.DIRECTIVE
? valueBinding.exp!
: createSimpleExpression(valueBinding.value!.content, true)
: createSimpleExpression(`null`, false)
}
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