Press n or j to go to the next uncovered block, b, p or k for the previous block.
| 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 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 | 87x 87x 87x 87x 87x 195x 87x 776x 776x 510x 510x 510x 510x 541x 541x 336x 336x 131x 131x 131x 131x 131x 205x 205x 197x 197x 149x 149x 27x 197x 18x 205x 6x 6x 410x 272x 272x 64x 272x 272x 64x 138x 14x 124x 22x 29x 510x 42x 510x 32x 87x 1769x 1769x 308x 3x 305x 305x 6x 299x 299x 2x 297x 1x 296x 296x 263x 263x 263x 18x 18x 245x 2x 245x 192x 192x 9x 9x 183x 1x 236x 236x 224x 224x 54x 54x 54x 236x 4x 8x 8x 1x 1x 3x 3x 3x 3x 235x 235x 33x 33x 126x 1x 158x 1042x 134x 134x 290x 290x 107x 183x 183x 111x 72x 23x 87x 13x 13x 13x 13x 437x 437x 437x 232x 232x 297x 297x 297x 297x 297x 245x 52x 13x 39x 297x 42x 255x 17x 395x 586x 586x 586x 493x 493x | import {
ConstantTypes,
RootNode,
NodeTypes,
TemplateChildNode,
SimpleExpressionNode,
ElementTypes,
PlainElementNode,
ComponentNode,
TemplateNode,
VNodeCall,
ParentNode,
JSChildNode,
CallExpression,
createArrayExpression
} from '../ast'
import { TransformContext } from '../transform'
import { PatchFlags, isString, isSymbol, isArray } from '@vue/shared'
import { getVNodeBlockHelper, getVNodeHelper, isSlotOutlet } from '../utils'
import {
OPEN_BLOCK,
GUARD_REACTIVE_PROPS,
NORMALIZE_CLASS,
NORMALIZE_PROPS,
NORMALIZE_STYLE
} from '../runtimeHelpers'
export function hoistStatic(root: RootNode, context: TransformContext) {
walk(
root,
context,
// Root node is unfortunately non-hoistable due to potential parent
// fallthrough attributes.
isSingleElementRoot(root, root.children[0])
)
}
export function isSingleElementRoot(
root: RootNode,
child: TemplateChildNode
): child is PlainElementNode | ComponentNode | TemplateNode {
const { children } = root
return (
children.length === 1 &&
child.type === NodeTypes.ELEMENT &&
!isSlotOutlet(child)
)
}
function walk(
node: ParentNode,
context: TransformContext,
doNotHoistNode: boolean = false
) {
const { children } = node
const originalCount = children.length
let hoistedCount = 0
for (let i = 0; i < children.length; i++) {
const child = children[i]
// only plain elements & text calls are eligible for hoisting.
if (
child.type === NodeTypes.ELEMENT &&
child.tagType === ElementTypes.ELEMENT
) {
const constantType = doNotHoistNode
? ConstantTypes.NOT_CONSTANT
: getConstantType(child, context)
if (constantType > ConstantTypes.NOT_CONSTANT) {
if (constantType >= ConstantTypes.CAN_HOIST) {
;(child.codegenNode as VNodeCall).patchFlag =
PatchFlags.HOISTED + (__DEV__ ? ` /* HOISTED */` : ``)
child.codegenNode = context.hoist(child.codegenNode!)
hoistedCount++
continue
}
} else {
// node may contain dynamic children, but its props may be eligible for
// hoisting.
const codegenNode = child.codegenNode!
if (codegenNode.type === NodeTypes.VNODE_CALL) {
const flag = getPatchFlag(codegenNode)
if (
(!flag ||
flag === PatchFlags.NEED_PATCH ||
flag === PatchFlags.TEXT) &&
getGeneratedPropsConstantType(child, context) >=
ConstantTypes.CAN_HOIST
) {
const props = getNodeProps(child)
if (props) {
codegenNode.props = context.hoist(props)
}
}
if (codegenNode.dynamicProps) {
codegenNode.dynamicProps = context.hoist(codegenNode.dynamicProps)
}
}
}
} else if (
child.type === NodeTypes.TEXT_CALL &&
getConstantType(child.content, context) >= ConstantTypes.CAN_HOIST
) {
child.codegenNode = context.hoist(child.codegenNode)
hoistedCount++
}
// walk further
if (child.type === NodeTypes.ELEMENT) {
const isComponent = child.tagType === ElementTypes.COMPONENT
if (isComponent) {
context.scopes.vSlot++
}
walk(child, context)
if (isComponent) {
context.scopes.vSlot--
}
} else if (child.type === NodeTypes.FOR) {
// Do not hoist v-for single child because it has to be a block
walk(child, context, child.children.length === 1)
} else if (child.type === NodeTypes.IF) {
for (let i = 0; i < child.branches.length; i++) {
// Do not hoist v-if single child because it has to be a block
walk(
child.branches[i],
context,
child.branches[i].children.length === 1
)
}
}
}
if (hoistedCount && context.transformHoist) {
context.transformHoist(children, context, node)
}
// all children were hoisted - the entire children array is hoistable.
if (
hoistedCount &&
hoistedCount === originalCount &&
node.type === NodeTypes.ELEMENT &&
node.tagType === ElementTypes.ELEMENT &&
node.codegenNode &&
node.codegenNode.type === NodeTypes.VNODE_CALL &&
isArray(node.codegenNode.children)
) {
node.codegenNode.children = context.hoist(
createArrayExpression(node.codegenNode.children)
)
}
}
export function getConstantType(
node: TemplateChildNode | SimpleExpressionNode,
context: TransformContext
): ConstantTypes {
const { constantCache } = context
switch (node.type) {
case NodeTypes.ELEMENT:
if (node.tagType !== ElementTypes.ELEMENT) {
return ConstantTypes.NOT_CONSTANT
}
const cached = constantCache.get(node)
if (cached !== undefined) {
return cached
}
const codegenNode = node.codegenNode!
if (codegenNode.type !== NodeTypes.VNODE_CALL) {
return ConstantTypes.NOT_CONSTANT
}
if (
codegenNode.isBlock &&
node.tag !== 'svg' &&
node.tag !== 'foreignObject'
) {
return ConstantTypes.NOT_CONSTANT
}
const flag = getPatchFlag(codegenNode)
if (!flag) {
let returnType = ConstantTypes.CAN_STRINGIFY
// Element itself has no patch flag. However we still need to check:
// 1. Even for a node with no patch flag, it is possible for it to contain
// non-hoistable expressions that refers to scope variables, e.g. compiler
// injected keys or cached event handlers. Therefore we need to always
// check the codegenNode's props to be sure.
const generatedPropsType = getGeneratedPropsConstantType(node, context)
if (generatedPropsType === ConstantTypes.NOT_CONSTANT) {
constantCache.set(node, ConstantTypes.NOT_CONSTANT)
return ConstantTypes.NOT_CONSTANT
}
if (generatedPropsType < returnType) {
returnType = generatedPropsType
}
// 2. its children.
for (let i = 0; i < node.children.length; i++) {
const childType = getConstantType(node.children[i], context)
if (childType === ConstantTypes.NOT_CONSTANT) {
constantCache.set(node, ConstantTypes.NOT_CONSTANT)
return ConstantTypes.NOT_CONSTANT
}
if (childType < returnType) {
returnType = childType
}
}
// 3. if the type is not already CAN_SKIP_PATCH which is the lowest non-0
// type, check if any of the props can cause the type to be lowered
// we can skip can_patch because it's guaranteed by the absence of a
// patchFlag.
if (returnType > ConstantTypes.CAN_SKIP_PATCH) {
for (let i = 0; i < node.props.length; i++) {
const p = node.props[i]
if (p.type === NodeTypes.DIRECTIVE && p.name === 'bind' && p.exp) {
const expType = getConstantType(p.exp, context)
Iif (expType === ConstantTypes.NOT_CONSTANT) {
constantCache.set(node, ConstantTypes.NOT_CONSTANT)
return ConstantTypes.NOT_CONSTANT
}
Iif (expType < returnType) {
returnType = expType
}
}
}
}
// only svg/foreignObject could be block here, however if they are
// static then they don't need to be blocks since there will be no
// nested updates.
if (codegenNode.isBlock) {
// except set custom directives.
for (let i = 0; i < node.props.length; i++) {
const p = node.props[i]
if (p.type === NodeTypes.DIRECTIVE) {
constantCache.set(node, ConstantTypes.NOT_CONSTANT)
return ConstantTypes.NOT_CONSTANT
}
}
context.removeHelper(OPEN_BLOCK)
context.removeHelper(
getVNodeBlockHelper(context.inSSR, codegenNode.isComponent)
)
codegenNode.isBlock = false
context.helper(getVNodeHelper(context.inSSR, codegenNode.isComponent))
}
constantCache.set(node, returnType)
return returnType
} else {
constantCache.set(node, ConstantTypes.NOT_CONSTANT)
return ConstantTypes.NOT_CONSTANT
}
case NodeTypes.TEXT:
case NodeTypes.COMMENT:
return ConstantTypes.CAN_STRINGIFY
case NodeTypes.IF:
case NodeTypes.FOR:
case NodeTypes.IF_BRANCH:
return ConstantTypes.NOT_CONSTANT
case NodeTypes.INTERPOLATION:
case NodeTypes.TEXT_CALL:
return getConstantType(node.content, context)
case NodeTypes.SIMPLE_EXPRESSION:
return node.constType
case NodeTypes.COMPOUND_EXPRESSION:
let returnType = ConstantTypes.CAN_STRINGIFY
for (let i = 0; i < node.children.length; i++) {
const child = node.children[i]
if (isString(child) || isSymbol(child)) {
continue
}
const childType = getConstantType(child, context)
if (childType === ConstantTypes.NOT_CONSTANT) {
return ConstantTypes.NOT_CONSTANT
} else Iif (childType < returnType) {
returnType = childType
}
}
return returnType
default:
Iif (__DEV__) {
const exhaustiveCheck: never = node
exhaustiveCheck
}
return ConstantTypes.NOT_CONSTANT
}
}
const allowHoistedHelperSet = new Set([
NORMALIZE_CLASS,
NORMALIZE_STYLE,
NORMALIZE_PROPS,
GUARD_REACTIVE_PROPS
])
function getConstantTypeOfHelperCall(
value: CallExpression,
context: TransformContext
): ConstantTypes {
if (
value.type === NodeTypes.JS_CALL_EXPRESSION &&
!isString(value.callee) &&
allowHoistedHelperSet.has(value.callee)
) {
const arg = value.arguments[0] as JSChildNode
if (arg.type === NodeTypes.SIMPLE_EXPRESSION) {
return getConstantType(arg, context)
} else IEif (arg.type === NodeTypes.JS_CALL_EXPRESSION) {
// in the case of nested helper call, e.g. `normalizeProps(guardReactiveProps(exp))`
return getConstantTypeOfHelperCall(arg, context)
}
}
return ConstantTypes.NOT_CONSTANT
}
function getGeneratedPropsConstantType(
node: PlainElementNode,
context: TransformContext
): ConstantTypes {
let returnType = ConstantTypes.CAN_STRINGIFY
const props = getNodeProps(node)
if (props && props.type === NodeTypes.JS_OBJECT_EXPRESSION) {
const { properties } = props
for (let i = 0; i < properties.length; i++) {
const { key, value } = properties[i]
const keyType = getConstantType(key, context)
Iif (keyType === ConstantTypes.NOT_CONSTANT) {
return keyType
}
Iif (keyType < returnType) {
returnType = keyType
}
let valueType: ConstantTypes
if (value.type === NodeTypes.SIMPLE_EXPRESSION) {
valueType = getConstantType(value, context)
} else if (value.type === NodeTypes.JS_CALL_EXPRESSION) {
// some helper calls can be hoisted,
// such as the `normalizeProps` generated by the compiler for pre-normalize class,
// in this case we need to respect the ConstantType of the helper's arguments
valueType = getConstantTypeOfHelperCall(value, context)
} else {
valueType = ConstantTypes.NOT_CONSTANT
}
if (valueType === ConstantTypes.NOT_CONSTANT) {
return valueType
}
if (valueType < returnType) {
returnType = valueType
}
}
}
return returnType
}
function getNodeProps(node: PlainElementNode) {
const codegenNode = node.codegenNode!
if (codegenNode.type === NodeTypes.VNODE_CALL) {
return codegenNode.props
}
}
function getPatchFlag(node: VNodeCall): number | undefined {
const flag = node.patchFlag
return flag ? parseInt(flag, 10) : undefined
}
|