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 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 | 1203x 1203x 6018x 6018x 6018x 744x 744x 744x 744x 579x 165x 86x 310x 66x 66x 66x 54x 54x 12x 11x 11x 66x 142x 142x 24x 118x 29x 89x 89x 142x 142x 24x 118x 29x 89x 89x 118x 118x 118x 118x 118x 224x 224x 224x 1203x 1203x 146x 146x 119x 146x 146x 1203x 1132x 1132x 1132x 326x 1132x 852x 1132x 1132x 1132x 1132x 1132x 1132x 1132x 1132x 1132x 1132x 852x 852x 852x 790x 790x 540x 540x 530x 540x 250x 62x 58x 58x 189x 3x 58x 3784x 3784x 65x 3784x 3418x 3418x 3418x 3418x 3418x 3418x 3418x 4785x 4785x 4785x 4785x 46287x 46287x 9937x 4040x 5897x 46287x 54x 46233x 4731x 37x 31x 37x 332x 294x 332x 136x 136x 136x 3784x 3784x 4731x 4731x 4731x 6163x 298x 768x 939x 298x 7905x 4156x 4156x 116x 4040x 4040x 2400x 2400x 379x 379x 379x 379x 4040x | import type { TransformOptions } from './options'
import {
type ArrayExpression,
type CacheExpression,
ConstantTypes,
type DirectiveNode,
type ElementNode,
ElementTypes,
type ExpressionNode,
type JSChildNode,
NodeTypes,
type ParentNode,
type Property,
type RootNode,
type SimpleExpressionNode,
type TemplateChildNode,
type TemplateLiteral,
convertToBlock,
createCacheExpression,
createSimpleExpression,
createVNodeCall,
} from './ast'
import {
EMPTY_OBJ,
NOOP,
PatchFlags,
camelize,
capitalize,
isArray,
isString,
} from '@vue/shared'
import { defaultOnError, defaultOnWarn } from './errors'
import {
CREATE_COMMENT,
FRAGMENT,
TO_DISPLAY_STRING,
helperNameMap,
} from './runtimeHelpers'
import { isVSlot } from './utils'
import { cacheStatic, getSingleElementRoot } from './transforms/cacheStatic'
import type { CompilerCompatOptions } from './compat/compatConfig'
// There are two types of transforms:
//
// - NodeTransform:
// Transforms that operate directly on a ChildNode. NodeTransforms may mutate,
// replace or remove the node being processed.
export type NodeTransform = (
node: RootNode | TemplateChildNode,
context: TransformContext,
) => void | (() => void) | (() => void)[]
// - DirectiveTransform:
// Transforms that handles a single directive attribute on an element.
// It translates the raw directive into actual props for the VNode.
export type DirectiveTransform = (
dir: DirectiveNode,
node: ElementNode,
context: TransformContext,
// a platform specific compiler can import the base transform and augment
// it by passing in this optional argument.
augmentor?: (ret: DirectiveTransformResult) => DirectiveTransformResult,
) => DirectiveTransformResult
export interface DirectiveTransformResult {
props: Property[]
needRuntime?: boolean | symbol
ssrTagParts?: TemplateLiteral['elements']
}
// A structural directive transform is technically also a NodeTransform;
// Only v-if and v-for fall into this category.
export type StructuralDirectiveTransform = (
node: ElementNode,
dir: DirectiveNode,
context: TransformContext,
) => void | (() => void)
export interface ImportItem {
exp: string | ExpressionNode
path: string
}
export interface TransformContext
extends
Required<Omit<TransformOptions, keyof CompilerCompatOptions>>,
CompilerCompatOptions {
selfName: string | null
root: RootNode
helpers: Map<symbol, number>
components: Set<string>
directives: Set<string>
hoists: (JSChildNode | null)[]
imports: ImportItem[]
temps: number
cached: (CacheExpression | null)[]
identifiers: { [name: string]: number | undefined }
scopes: {
vFor: number
vSlot: number
vPre: number
vOnce: number
}
parent: ParentNode | null
// we could use a stack but in practice we've only ever needed two layers up
// so this is more efficient
grandParent: ParentNode | null
childIndex: number
currentNode: RootNode | TemplateChildNode | null
inVOnce: boolean
helper<T extends symbol>(name: T): T
removeHelper<T extends symbol>(name: T): void
helperString(name: symbol): string
replaceNode(node: TemplateChildNode): void
removeNode(node?: TemplateChildNode): void
onNodeRemoved(): void
addIdentifiers(exp: ExpressionNode | string): void
removeIdentifiers(exp: ExpressionNode | string): void
hoist(exp: string | JSChildNode | ArrayExpression): SimpleExpressionNode
cache(exp: JSChildNode, isVNode?: boolean, inVOnce?: boolean): CacheExpression
constantCache: WeakMap<TemplateChildNode, ConstantTypes>
// 2.x Compat only
filters?: Set<string>
}
export function createTransformContext(
root: RootNode,
{
filename = '',
prefixIdentifiers = false,
hoistStatic = false,
hmr = false,
cacheHandlers = false,
nodeTransforms = [],
directiveTransforms = {},
transformHoist = null,
isBuiltInComponent = NOOP,
isCustomElement = NOOP,
expressionPlugins = [],
scopeId = null,
slotted = true,
ssr = false,
inSSR = false,
ssrCssVars = ``,
bindingMetadata = EMPTY_OBJ,
inline = false,
isTS = false,
onError = defaultOnError,
onWarn = defaultOnWarn,
compatConfig,
}: TransformOptions,
): TransformContext {
const nameMatch = filename.replace(/\?.*$/, '').match(/([^/\\]+)\.\w+$/)
const context: TransformContext = {
// options
filename,
selfName: nameMatch && capitalize(camelize(nameMatch[1])),
prefixIdentifiers,
hoistStatic,
hmr,
cacheHandlers,
nodeTransforms,
directiveTransforms,
transformHoist,
isBuiltInComponent,
isCustomElement,
expressionPlugins,
scopeId,
slotted,
ssr,
inSSR,
ssrCssVars,
bindingMetadata,
inline,
isTS,
onError,
onWarn,
compatConfig,
// state
root,
helpers: new Map(),
components: new Set(),
directives: new Set(),
hoists: [],
imports: [],
cached: [],
constantCache: new WeakMap(),
temps: 0,
identifiers: Object.create(null),
scopes: {
vFor: 0,
vSlot: 0,
vPre: 0,
vOnce: 0,
},
parent: null,
grandParent: null,
currentNode: root,
childIndex: 0,
inVOnce: false,
// methods
helper(name) {
const count = context.helpers.get(name) || 0
context.helpers.set(name, count + 1)
return name
},
removeHelper(name) {
const count = context.helpers.get(name)
Eif (count) {
const currentCount = count - 1
if (!currentCount) {
context.helpers.delete(name)
} else {
context.helpers.set(name, currentCount)
}
}
},
helperString(name) {
return `_${helperNameMap[context.helper(name)]}`
},
replaceNode(node) {
/* v8 ignore start */
if (__DEV__) {
if (!context.currentNode) {
throw new Error(`Node being replaced is already removed.`)
}
if (!context.parent) {
throw new Error(`Cannot replace root node.`)
}
}
/* v8 ignore stop */
context.parent!.children[context.childIndex] = context.currentNode = node
},
removeNode(node) {
/* v8 ignore next 3 */
if (__DEV__ && !context.parent) {
throw new Error(`Cannot remove root node.`)
}
const list = context.parent!.children
const removalIndex = node
? list.indexOf(node)
: context.currentNode
? context.childIndex
: -1
/* v8 ignore next 3 */
if (__DEV__ && removalIndex < 0) {
throw new Error(`node being removed is not a child of current parent`)
}
if (!node || node === context.currentNode) {
// current node removed
context.currentNode = null
context.onNodeRemoved()
} else {
// sibling node removed
if (context.childIndex > removalIndex) {
context.childIndex--
context.onNodeRemoved()
}
}
context.parent!.children.splice(removalIndex, 1)
},
onNodeRemoved: NOOP,
addIdentifiers(exp) {
// identifier tracking only happens in non-browser builds.
Eif (!__BROWSER__) {
if (isString(exp)) {
addId(exp)
} else if (exp.identifiers) {
exp.identifiers.forEach(addId)
} else if (Eexp.type === NodeTypes.SIMPLE_EXPRESSION) {
addId(exp.content)
}
}
},
removeIdentifiers(exp) {
Eif (!__BROWSER__) {
if (isString(exp)) {
removeId(exp)
} else if (exp.identifiers) {
exp.identifiers.forEach(removeId)
} else if (Eexp.type === NodeTypes.SIMPLE_EXPRESSION) {
removeId(exp.content)
}
}
},
hoist(exp) {
if (isString(exp)) exp = createSimpleExpression(exp)
context.hoists.push(exp)
const identifier = createSimpleExpression(
`_hoisted_${context.hoists.length}`,
false,
exp.loc,
ConstantTypes.CAN_CACHE,
)
identifier.hoisted = exp
return identifier
},
cache(exp, isVNode = false, inVOnce = false) {
const cacheExp = createCacheExpression(
context.cached.length,
exp,
isVNode,
inVOnce,
)
context.cached.push(cacheExp)
return cacheExp
},
}
Eif (__COMPAT__) {
context.filters = new Set()
}
function addId(id: string) {
const { identifiers } = context
if (identifiers[id] === undefined) {
identifiers[id] = 0
}
identifiers[id]!++
}
function removeId(id: string) {
context.identifiers[id]!--
}
return context
}
export function transform(root: RootNode, options: TransformOptions): void {
const context = createTransformContext(root, options)
traverseNode(root, context)
if (options.hoistStatic) {
cacheStatic(root, context)
}
if (!options.ssr) {
createRootCodegen(root, context)
}
// finalize meta information
root.helpers = new Set([...context.helpers.keys()])
root.components = [...context.components]
root.directives = [...context.directives]
root.imports = context.imports
root.hoists = context.hoists
root.temps = context.temps
root.cached = context.cached
root.transformed = true
Eif (__COMPAT__) {
root.filters = [...context.filters!]
}
}
function createRootCodegen(root: RootNode, context: TransformContext) {
const { helper } = context
const { children } = root
if (children.length === 1) {
const singleElementRootChild = getSingleElementRoot(root)
// if the single child is an element, turn it into a block.
if (singleElementRootChild && singleElementRootChild.codegenNode) {
// single element root is never hoisted so codegenNode will never be
// SimpleExpressionNode
const codegenNode = singleElementRootChild.codegenNode
if (codegenNode.type === NodeTypes.VNODE_CALL) {
convertToBlock(codegenNode, context)
}
root.codegenNode = codegenNode
} else {
// - single <slot/>, IfNode, ForNode: already blocks.
// - single text node: always patched.
// root codegen falls through via genNode()
root.codegenNode = children[0]
}
} else if (children.length > 1) {
// root has multiple nodes - return a fragment block.
let patchFlag = PatchFlags.STABLE_FRAGMENT
// check if the fragment actually contains a single valid child with
// the rest being comments
if (
__DEV__ &&
children.filter(c => c.type !== NodeTypes.COMMENT).length === 1
) {
patchFlag |= PatchFlags.DEV_ROOT_FRAGMENT
}
root.codegenNode = createVNodeCall(
context,
helper(FRAGMENT),
undefined,
root.children,
patchFlag,
undefined,
undefined,
true,
undefined,
false /* isComponent */,
)
} else {
// no children = noop. codegen will return null.
}
}
export function traverseChildren(
parent: ParentNode,
context: TransformContext,
): void {
let i = 0
const nodeRemoved = () => {
i--
}
for (; i < parent.children.length; i++) {
const child = parent.children[i]
Iif (isString(child)) continue
context.grandParent = context.parent
context.parent = parent
context.childIndex = i
context.onNodeRemoved = nodeRemoved
traverseNode(child, context)
}
}
export function traverseNode(
node: RootNode | TemplateChildNode,
context: TransformContext,
): void {
context.currentNode = node
// apply transform plugins
const { nodeTransforms } = context
const exitFns = []
for (let i = 0; i < nodeTransforms.length; i++) {
const onExit = nodeTransforms[i](node, context)
if (onExit) {
if (isArray(onExit)) {
exitFns.push(...onExit)
} else {
exitFns.push(onExit)
}
}
if (!context.currentNode) {
// node was removed
return
} else {
// node may have been replaced
node = context.currentNode
}
}
switch (node.type) {
case NodeTypes.COMMENT:
if (!context.ssr) {
// inject import for the Comment symbol, which is needed for creating
// comment nodes with `createVNode`
context.helper(CREATE_COMMENT)
}
break
case NodeTypes.INTERPOLATION:
// no need to traverse, but we need to inject toString helper
if (!context.ssr) {
context.helper(TO_DISPLAY_STRING)
}
break
// for container types, further traverse downwards
case NodeTypes.IF:
for (let i = 0; i < node.branches.length; i++) {
traverseNode(node.branches[i], context)
}
break
case NodeTypes.IF_BRANCH:
case NodeTypes.FOR:
case NodeTypes.ELEMENT:
case NodeTypes.ROOT:
traverseChildren(node, context)
break
}
// exit transforms
context.currentNode = node
let i = exitFns.length
while (i--) {
exitFns[i]()
}
}
export function createStructuralDirectiveTransform(
name: string | RegExp,
fn: StructuralDirectiveTransform,
): NodeTransform {
const matches = isString(name)
? (n: string) => n === name
: (n: string) => name.test(n)
return (node, context) => {
if (node.type === NodeTypes.ELEMENT) {
const { props } = node
// structural directive transforms are not concerned with slots
// as they are handled separately in vSlot.ts
if (node.tagType === ElementTypes.TEMPLATE && props.some(isVSlot)) {
return
}
const exitFns = []
for (let i = 0; i < props.length; i++) {
const prop = props[i]
if (prop.type === NodeTypes.DIRECTIVE && matches(prop.name)) {
// structural directives are removed to avoid infinite recursion
// also we remove them *before* applying so that it can further
// traverse itself in case it moves the node around
props.splice(i, 1)
i--
const onExit = fn(node, prop, context)
if (onExit) exitFns.push(onExit)
}
}
return exitFns
}
}
}
|