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import { NO, isArray, makeMap, extend } from '@vue/shared'
import {
ErrorCodes,
createCompilerError,
defaultOnError,
defaultOnWarn
} from './errors'
import {
assert,
advancePositionWithMutation,
advancePositionWithClone,
isCoreComponent,
isStaticArgOf
} from './utils'
import {
Namespaces,
AttributeNode,
CommentNode,
DirectiveNode,
ElementNode,
ElementTypes,
ExpressionNode,
NodeTypes,
Position,
RootNode,
SourceLocation,
TextNode,
TemplateChildNode,
InterpolationNode,
createRoot,
ConstantTypes
} from './ast'
import {
checkCompatEnabled,
CompilerCompatOptions,
CompilerDeprecationTypes,
isCompatEnabled,
warnDeprecation
} from './compat/compatConfig'
type OptionalOptions =
| 'whitespace'
| 'isNativeTag'
| 'isBuiltInComponent'
| keyof CompilerCompatOptions
type MergedParserOptions = Omit<Required<ParserOptions>, OptionalOptions> &
Pick<ParserOptions, OptionalOptions>
type AttributeValue =
| {
content: string
isQuoted: boolean
loc: SourceLocation
}
| undefined
// The default decoder only provides escapes for characters reserved as part of
// the template syntax, and is only used if the custom renderer did not provide
// a platform-specific decoder.
const decodeRE = /&(gt|lt|amp|apos|quot);/g
const decodeMap: Record<string, string> = {
gt: '>',
lt: '<',
amp: '&',
apos: "'",
quot: '"'
}
export const defaultParserOptions: MergedParserOptions = {
delimiters: [`{{`, `}}`],
getNamespace: () => Namespaces.HTML,
getTextMode: () => TextModes.DATA,
isVoidTag: NO,
isPreTag: NO,
isCustomElement: NO,
decodeEntities: (rawText: string): string =>
rawText.replace(decodeRE, (_, p1) => decodeMap[p1]),
onError: defaultOnError,
onWarn: defaultOnWarn,
comments: __DEV__
}
export const enum TextModes {
// | Elements | Entities | End sign | Inside of
DATA, // | ✔ | ✔ | End tags of ancestors |
RCDATA, // | ✘ | ✔ | End tag of the parent | <textarea>
RAWTEXT, // | ✘ | ✘ | End tag of the parent | <style>,<script>
CDATA,
ATTRIBUTE_VALUE
}
export interface ParserContext {
options: MergedParserOptions
readonly originalSource: string
source: string
offset: number
line: number
column: number
inPre: boolean // HTML <pre> tag, preserve whitespaces
inVPre: boolean // v-pre, do not process directives and interpolations
onWarn: NonNullable<ErrorHandlingOptions['onWarn']>
}
export function baseParse(
content: string,
options: ParserOptions = {}
): RootNode {
const context = createParserContext(content, options)
const start = getCursor(context)
return createRoot(
parseChildren(context, TextModes.DATA, []),
getSelection(context, start)
)
}
function createParserContext(
content: string,
rawOptions: ParserOptions
): ParserContext {
const options = extend({}, defaultParserOptions)
let key: keyof ParserOptions
for (key in rawOptions) {
// @ts-ignore
options[key] =
rawOptions[key] === undefined
? defaultParserOptions[key]
: rawOptions[key]
}
return {
options,
column: 1,
line: 1,
offset: 0,
originalSource: content,
source: content,
inPre: false,
inVPre: false,
onWarn: options.onWarn
}
}
function parseChildren(
context: ParserContext,
mode: TextModes,
ancestors: ElementNode[]
): TemplateChildNode[] {
const parent = last(ancestors)
const ns = parent ? parent.ns : Namespaces.HTML
const nodes: TemplateChildNode[] = []
while (!isEnd(context, mode, ancestors)) {
__TEST__ && assert(context.source.length > 0)
const s = context.source
let node: TemplateChildNode | TemplateChildNode[] | undefined = undefined
if (mode === TextModes.DATA || mode === TextModes.RCDATA) {
if (!context.inVPre && startsWith(s, context.options.delimiters[0])) {
// '{{'
node = parseInterpolation(context, mode)
} else if (mode === TextModes.DATA && s[0] === '<') {
// https://html.spec.whatwg.org/multipage/parsing.html#tag-open-state
if (s.length === 1) {
emitError(context, ErrorCodes.EOF_BEFORE_TAG_NAME, 1)
} else if (s[1] === '!') {
// https://html.spec.whatwg.org/multipage/parsing.html#markup-declaration-open-state
if (startsWith(s, '<!--')) {
node = parseComment(context)
} else if (startsWith(s, '<!DOCTYPE')) {
// Ignore DOCTYPE by a limitation.
node = parseBogusComment(context)
} else if (startsWith(s, '<![CDATA[')) {
if (ns !== Namespaces.HTML) {
node = parseCDATA(context, ancestors)
} else {
emitError(context, ErrorCodes.CDATA_IN_HTML_CONTENT)
node = parseBogusComment(context)
}
} else {
emitError(context, ErrorCodes.INCORRECTLY_OPENED_COMMENT)
node = parseBogusComment(context)
}
} else if (s[1] === '/') {
// https://html.spec.whatwg.org/multipage/parsing.html#end-tag-open-state
if (s.length === 2) {
emitError(context, ErrorCodes.EOF_BEFORE_TAG_NAME, 2)
} else if (s[2] === '>') {
emitError(context, ErrorCodes.MISSING_END_TAG_NAME, 2)
advanceBy(context, 3)
continue
} else if (/[a-z]/i.test(s[2])) {
emitError(context, ErrorCodes.X_INVALID_END_TAG)
parseTag(context, TagType.End, parent)
continue
} else {
emitError(
context,
ErrorCodes.INVALID_FIRST_CHARACTER_OF_TAG_NAME,
2
)
node = parseBogusComment(context)
}
} else if (/[a-z]/i.test(s[1])) {
node = parseElement(context, ancestors)
// 2.x <template> with no directive compat
if (
__COMPAT__ &&
isCompatEnabled(
CompilerDeprecationTypes.COMPILER_NATIVE_TEMPLATE,
context
) &&
node &&
node.tag === 'template' &&
!node.props.some(
p =>
p.type === NodeTypes.DIRECTIVE &&
isSpecialTemplateDirective(p.name)
)
) {
__DEV__ &&
warnDeprecation(
CompilerDeprecationTypes.COMPILER_NATIVE_TEMPLATE,
context,
node.loc
)
node = node.children
}
} else if (s[1] === '?') {
emitError(
context,
ErrorCodes.UNEXPECTED_QUESTION_MARK_INSTEAD_OF_TAG_NAME,
1
)
node = parseBogusComment(context)
} else {
emitError(context, ErrorCodes.INVALID_FIRST_CHARACTER_OF_TAG_NAME, 1)
}
}
}
if (!node) {
node = parseText(context, mode)
}
if (isArray(node)) {
for (let i = 0; i < node.length; i++) {
pushNode(nodes, node[i])
}
} else {
pushNode(nodes, node)
}
}
// Whitespace handling strategy like v2
let removedWhitespace = false
if (mode !== TextModes.RAWTEXT && mode !== TextModes.RCDATA) {
const shouldCondense = context.options.whitespace !== 'preserve'
for (let i = 0; i < nodes.length; i++) {
const node = nodes[i]
if (!context.inPre && node.type === NodeTypes.TEXT) {
if (!/[^\t\r\n\f ]/.test(node.content)) {
const prev = nodes[i - 1]
const next = nodes[i + 1]
// Remove if:
// - the whitespace is the first or last node, or:
// - (condense mode) the whitespace is adjacent to a comment, or:
// - (condense mode) the whitespace is between two elements AND contains newline
if (
!prev ||
!next ||
(shouldCondense &&
(prev.type === NodeTypes.COMMENT ||
next.type === NodeTypes.COMMENT ||
(prev.type === NodeTypes.ELEMENT &&
next.type === NodeTypes.ELEMENT &&
/[\r\n]/.test(node.content))))
) {
removedWhitespace = true
nodes[i] = null as any
} else {
// Otherwise, the whitespace is condensed into a single space
node.content = ' '
}
} else if (shouldCondense) {
// in condense mode, consecutive whitespaces in text are condensed
// down to a single space.
node.content = node.content.replace(/[\t\r\n\f ]+/g, ' ')
}
}
// Remove comment nodes if desired by configuration.
else if (node.type === NodeTypes.COMMENT && !context.options.comments) {
removedWhitespace = true
nodes[i] = null as any
}
}
if (context.inPre && parent && context.options.isPreTag(parent.tag)) {
// remove leading newline per html spec
// https://html.spec.whatwg.org/multipage/grouping-content.html#the-pre-element
const first = nodes[0]
if (first && first.type === NodeTypes.TEXT) {
first.content = first.content.replace(/^\r?\n/, '')
}
}
}
return removedWhitespace ? nodes.filter(Boolean) : nodes
}
function pushNode(nodes: TemplateChildNode[], node: TemplateChildNode): void {
if (node.type === NodeTypes.TEXT) {
const prev = last(nodes)
// Merge if both this and the previous node are text and those are
// consecutive. This happens for cases like "a < b".
if (
prev &&
prev.type === NodeTypes.TEXT &&
prev.loc.end.offset === node.loc.start.offset
) {
prev.content += node.content
prev.loc.end = node.loc.end
prev.loc.source += node.loc.source
return
}
}
nodes.push(node)
}
function parseCDATA(
context: ParserContext,
ancestors: ElementNode[]
): TemplateChildNode[] {
__TEST__ &&
assert(last(ancestors) == null || last(ancestors)!.ns !== Namespaces.HTML)
__TEST__ && assert(startsWith(context.source, '<![CDATA['))
advanceBy(context, 9)
const nodes = parseChildren(context, TextModes.CDATA, ancestors)
if (context.source.length === 0) {
emitError(context, ErrorCodes.EOF_IN_CDATA)
} else {
__TEST__ && assert(startsWith(context.source, ']]>'))
advanceBy(context, 3)
}
return nodes
}
function parseComment(context: ParserContext): CommentNode {
__TEST__ && assert(startsWith(context.source, '<!--'))
const start = getCursor(context)
let content: string
// Regular comment.
const match = /--(\!)?>/.exec(context.source)
if (!match) {
content = context.source.slice(4)
advanceBy(context, context.source.length)
emitError(context, ErrorCodes.EOF_IN_COMMENT)
} else {
if (match.index <= 3) {
emitError(context, ErrorCodes.ABRUPT_CLOSING_OF_EMPTY_COMMENT)
}
if (match[1]) {
emitError(context, ErrorCodes.INCORRECTLY_CLOSED_COMMENT)
}
content = context.source.slice(4, match.index)
// Advancing with reporting nested comments.
const s = context.source.slice(0, match.index)
let prevIndex = 1,
nestedIndex = 0
while ((nestedIndex = s.indexOf('<!--', prevIndex)) !== -1) {
advanceBy(context, nestedIndex - prevIndex + 1)
if (nestedIndex + 4 < s.length) {
emitError(context, ErrorCodes.NESTED_COMMENT)
}
prevIndex = nestedIndex + 1
}
advanceBy(context, match.index + match[0].length - prevIndex + 1)
}
return {
type: NodeTypes.COMMENT,
content,
loc: getSelection(context, start)
}
}
function parseBogusComment(context: ParserContext): CommentNode | undefined {
__TEST__ && assert(/^<(?:[\!\?]|\/[^a-z>])/i.test(context.source))
const start = getCursor(context)
const contentStart = context.source[1] === '?' ? 1 : 2
let content: string
const closeIndex = context.source.indexOf('>')
if (closeIndex === -1) {
content = context.source.slice(contentStart)
advanceBy(context, context.source.length)
} else {
content = context.source.slice(contentStart, closeIndex)
advanceBy(context, closeIndex + 1)
}
return {
type: NodeTypes.COMMENT,
content,
loc: getSelection(context, start)
}
}
function parseElement(
context: ParserContext,
ancestors: ElementNode[]
): ElementNode | undefined {
__TEST__ && assert(/^<[a-z]/i.test(context.source))
// Start tag.
const wasInPre = context.inPre
const wasInVPre = context.inVPre
const parent = last(ancestors)
const element = parseTag(context, TagType.Start, parent)
const isPreBoundary = context.inPre && !wasInPre
const isVPreBoundary = context.inVPre && !wasInVPre
if (element.isSelfClosing || context.options.isVoidTag(element.tag)) {
// #4030 self-closing <pre> tag
if (isPreBoundary) {
context.inPre = false
}
if (isVPreBoundary) {
context.inVPre = false
}
return element
}
// Children.
ancestors.push(element)
const mode = context.options.getTextMode(element, parent)
const children = parseChildren(context, mode, ancestors)
ancestors.pop()
// 2.x inline-template compat
if (__COMPAT__) {
const inlineTemplateProp = element.props.find(
p => p.type === NodeTypes.ATTRIBUTE && p.name === 'inline-template'
) as AttributeNode
if (
inlineTemplateProp &&
checkCompatEnabled(
CompilerDeprecationTypes.COMPILER_INLINE_TEMPLATE,
context,
inlineTemplateProp.loc
)
) {
const loc = getSelection(context, element.loc.end)
inlineTemplateProp.value = {
type: NodeTypes.TEXT,
content: loc.source,
loc
}
}
}
element.children = children
// End tag.
if (startsWithEndTagOpen(context.source, element.tag)) {
parseTag(context, TagType.End, parent)
} else {
emitError(context, ErrorCodes.X_MISSING_END_TAG, 0, element.loc.start)
if (context.source.length === 0 && element.tag.toLowerCase() === 'script') {
const first = children[0]
if (first && startsWith(first.loc.source, '<!--')) {
emitError(context, ErrorCodes.EOF_IN_SCRIPT_HTML_COMMENT_LIKE_TEXT)
}
}
}
element.loc = getSelection(context, element.loc.start)
if (isPreBoundary) {
context.inPre = false
}
if (isVPreBoundary) {
context.inVPre = false
}
return element
}
const enum TagType {
Start,
End
}
const isSpecialTemplateDirective = /*#__PURE__*/ makeMap(
`if,else,else-if,for,slot`
)
/**
* Parse a tag (E.g. `<div id=a>`) with that type (start tag or end tag).
*/
function parseTag(
context: ParserContext,
type: TagType.Start,
parent: ElementNode | undefined
): ElementNode
function parseTag(
context: ParserContext,
type: TagType.End,
parent: ElementNode | undefined
): void
function parseTag(
context: ParserContext,
type: TagType,
parent: ElementNode | undefined
): ElementNode | undefined {
__TEST__ && assert(/^<\/?[a-z]/i.test(context.source))
__TEST__ &&
assert(
type === (startsWith(context.source, '</') ? TagType.End : TagType.Start)
)
// Tag open.
const start = getCursor(context)
const match = /^<\/?([a-z][^\t\r\n\f />]*)/i.exec(context.source)!
const tag = match[1]
const ns = context.options.getNamespace(tag, parent)
advanceBy(context, match[0].length)
advanceSpaces(context)
// save current state in case we need to re-parse attributes with v-pre
const cursor = getCursor(context)
const currentSource = context.source
// check <pre> tag
if (context.options.isPreTag(tag)) {
context.inPre = true
}
// Attributes.
let props = parseAttributes(context, type)
// check v-pre
if (
type === TagType.Start &&
!context.inVPre &&
props.some(p => p.type === NodeTypes.DIRECTIVE && p.name === 'pre')
) {
context.inVPre = true
// reset context
extend(context, cursor)
context.source = currentSource
// re-parse attrs and filter out v-pre itself
props = parseAttributes(context, type).filter(p => p.name !== 'v-pre')
}
// Tag close.
let isSelfClosing = false
if (context.source.length === 0) {
emitError(context, ErrorCodes.EOF_IN_TAG)
} else {
isSelfClosing = startsWith(context.source, '/>')
if (type === TagType.End && isSelfClosing) {
emitError(context, ErrorCodes.END_TAG_WITH_TRAILING_SOLIDUS)
}
advanceBy(context, isSelfClosing ? 2 : 1)
}
if (type === TagType.End) {
return
}
// 2.x deprecation checks
if (
__COMPAT__ &&
__DEV__ &&
isCompatEnabled(
CompilerDeprecationTypes.COMPILER_V_IF_V_FOR_PRECEDENCE,
context
)
) {
let hasIf = false
let hasFor = false
for (let i = 0; i < props.length; i++) {
const p = props[i]
if (p.type === NodeTypes.DIRECTIVE) {
if (p.name === 'if') {
hasIf = true
} else if (p.name === 'for') {
hasFor = true
}
}
if (hasIf && hasFor) {
warnDeprecation(
CompilerDeprecationTypes.COMPILER_V_IF_V_FOR_PRECEDENCE,
context,
getSelection(context, start)
)
break
}
}
}
let tagType = ElementTypes.ELEMENT
if (!context.inVPre) {
if (tag === 'slot') {
tagType = ElementTypes.SLOT
} else if (tag === 'template') {
if (
props.some(
p =>
p.type === NodeTypes.DIRECTIVE && isSpecialTemplateDirective(p.name)
)
) {
tagType = ElementTypes.TEMPLATE
}
} else if (isComponent(tag, props, context)) {
tagType = ElementTypes.COMPONENT
}
}
return {
type: NodeTypes.ELEMENT,
ns,
tag,
tagType,
props,
isSelfClosing,
children: [],
loc: getSelection(context, start),
codegenNode: undefined // to be created during transform phase
}
}
function isComponent(
tag: string,
props: (AttributeNode | DirectiveNode)[],
context: ParserContext
) {
const options = context.options
if (options.isCustomElement(tag)) {
return false
}
if (
tag === 'component' ||
/^[A-Z]/.test(tag) ||
isCoreComponent(tag) ||
(options.isBuiltInComponent && options.isBuiltInComponent(tag)) ||
(options.isNativeTag && !options.isNativeTag(tag))
) {
return true
}
// at this point the tag should be a native tag, but check for potential "is"
// casting
for (let i = 0; i < props.length; i++) {
const p = props[i]
if (p.type === NodeTypes.ATTRIBUTE) {
if (p.name === 'is' && p.value) {
Iif (p.value.content.startsWith('vue:')) {
return true
} else if (
__COMPAT__ &&
checkCompatEnabled(
CompilerDeprecationTypes.COMPILER_IS_ON_ELEMENT,
context,
p.loc
)
) {
return true
}
}
} else {
// directive
// v-is (TODO Deprecate)
if (p.name === 'is') {
return true
} else if (
// :is on plain element - only treat as component in compat mode
p.name === 'bind' &&
isStaticArgOf(p.arg, 'is') &&
__COMPAT__ &&
checkCompatEnabled(
CompilerDeprecationTypes.COMPILER_IS_ON_ELEMENT,
context,
p.loc
)
) {
return true
}
}
}
}
function parseAttributes(
context: ParserContext,
type: TagType
): (AttributeNode | DirectiveNode)[] {
const props = []
const attributeNames = new Set<string>()
while (
context.source.length > 0 &&
!startsWith(context.source, '>') &&
!startsWith(context.source, '/>')
) {
if (startsWith(context.source, '/')) {
emitError(context, ErrorCodes.UNEXPECTED_SOLIDUS_IN_TAG)
advanceBy(context, 1)
advanceSpaces(context)
continue
}
if (type === TagType.End) {
emitError(context, ErrorCodes.END_TAG_WITH_ATTRIBUTES)
}
const attr = parseAttribute(context, attributeNames)
// Trim whitespace between class
// https://github.com/vuejs/core/issues/4251
if (
attr.type === NodeTypes.ATTRIBUTE &&
attr.value &&
attr.name === 'class'
) {
attr.value.content = attr.value.content.replace(/\s+/g, ' ').trim()
}
if (type === TagType.Start) {
props.push(attr)
}
if (/^[^\t\r\n\f />]/.test(context.source)) {
emitError(context, ErrorCodes.MISSING_WHITESPACE_BETWEEN_ATTRIBUTES)
}
advanceSpaces(context)
}
return props
}
function parseAttribute(
context: ParserContext,
nameSet: Set<string>
): AttributeNode | DirectiveNode {
__TEST__ && assert(/^[^\t\r\n\f />]/.test(context.source))
// Name.
const start = getCursor(context)
const match = /^[^\t\r\n\f />][^\t\r\n\f />=]*/.exec(context.source)!
const name = match[0]
if (nameSet.has(name)) {
emitError(context, ErrorCodes.DUPLICATE_ATTRIBUTE)
}
nameSet.add(name)
if (name[0] === '=') {
emitError(context, ErrorCodes.UNEXPECTED_EQUALS_SIGN_BEFORE_ATTRIBUTE_NAME)
}
{
const pattern = /["'<]/g
let m: RegExpExecArray | null
while ((m = pattern.exec(name))) {
emitError(
context,
ErrorCodes.UNEXPECTED_CHARACTER_IN_ATTRIBUTE_NAME,
m.index
)
}
}
advanceBy(context, name.length)
// Value
let value: AttributeValue = undefined
if (/^[\t\r\n\f ]*=/.test(context.source)) {
advanceSpaces(context)
advanceBy(context, 1)
advanceSpaces(context)
value = parseAttributeValue(context)
if (!value) {
emitError(context, ErrorCodes.MISSING_ATTRIBUTE_VALUE)
}
}
const loc = getSelection(context, start)
if (!context.inVPre && /^(v-[A-Za-z0-9-]|:|\.|@|#)/.test(name)) {
const match =
/(?:^v-([a-z0-9-]+))?(?:(?::|^\.|^@|^#)(\[[^\]]+\]|[^\.]+))?(.+)?$/i.exec(
name
)!
let isPropShorthand = startsWith(name, '.')
let dirName =
match[1] ||
(isPropShorthand || startsWith(name, ':')
? 'bind'
: startsWith(name, '@')
? 'on'
: 'slot')
let arg: ExpressionNode | undefined
if (match[2]) {
const isSlot = dirName === 'slot'
const startOffset = name.lastIndexOf(match[2])
const loc = getSelection(
context,
getNewPosition(context, start, startOffset),
getNewPosition(
context,
start,
startOffset + match[2].length + ((isSlot && match[3]) || '').length
)
)
let content = match[2]
let isStatic = true
if (content.startsWith('[')) {
isStatic = false
if (!content.endsWith(']')) {
emitError(
context,
ErrorCodes.X_MISSING_DYNAMIC_DIRECTIVE_ARGUMENT_END
)
content = content.slice(1)
} else {
content = content.slice(1, content.length - 1)
}
} else if (isSlot) {
// #1241 special case for v-slot: vuetify relies extensively on slot
// names containing dots. v-slot doesn't have any modifiers and Vue 2.x
// supports such usage so we are keeping it consistent with 2.x.
content += match[3] || ''
}
arg = {
type: NodeTypes.SIMPLE_EXPRESSION,
content,
isStatic,
constType: isStatic
? ConstantTypes.CAN_STRINGIFY
: ConstantTypes.NOT_CONSTANT,
loc
}
}
if (value && value.isQuoted) {
const valueLoc = value.loc
valueLoc.start.offset++
valueLoc.start.column++
valueLoc.end = advancePositionWithClone(valueLoc.start, value.content)
valueLoc.source = valueLoc.source.slice(1, -1)
}
const modifiers = match[3] ? match[3].slice(1).split('.') : []
if (isPropShorthand) modifiers.push('prop')
// 2.x compat v-bind:foo.sync -> v-model:foo
if (__COMPAT__ && dirName === 'bind' && arg) {
if (
modifiers.includes('sync') &&
checkCompatEnabled(
CompilerDeprecationTypes.COMPILER_V_BIND_SYNC,
context,
loc,
arg.loc.source
)
) {
dirName = 'model'
modifiers.splice(modifiers.indexOf('sync'), 1)
}
if (__DEV__ && modifiers.includes('prop')) {
checkCompatEnabled(
CompilerDeprecationTypes.COMPILER_V_BIND_PROP,
context,
loc
)
}
}
return {
type: NodeTypes.DIRECTIVE,
name: dirName,
exp: value && {
type: NodeTypes.SIMPLE_EXPRESSION,
content: value.content,
isStatic: false,
// Treat as non-constant by default. This can be potentially set to
// other values by `transformExpression` to make it eligible for hoisting.
constType: ConstantTypes.NOT_CONSTANT,
loc: value.loc
},
arg,
modifiers,
loc
}
}
// missing directive name or illegal directive name
if (!context.inVPre && startsWith(name, 'v-')) {
emitError(context, ErrorCodes.X_MISSING_DIRECTIVE_NAME)
}
return {
type: NodeTypes.ATTRIBUTE,
name,
value: value && {
type: NodeTypes.TEXT,
content: value.content,
loc: value.loc
},
loc
}
}
function parseAttributeValue(context: ParserContext): AttributeValue {
const start = getCursor(context)
let content: string
const quote = context.source[0]
const isQuoted = quote === `"` || quote === `'`
if (isQuoted) {
// Quoted value.
advanceBy(context, 1)
const endIndex = context.source.indexOf(quote)
if (endIndex === -1) {
content = parseTextData(
context,
context.source.length,
TextModes.ATTRIBUTE_VALUE
)
} else {
content = parseTextData(context, endIndex, TextModes.ATTRIBUTE_VALUE)
advanceBy(context, 1)
}
} else {
// Unquoted
const match = /^[^\t\r\n\f >]+/.exec(context.source)
if (!match) {
return undefined
}
const unexpectedChars = /["'<=`]/g
let m: RegExpExecArray | null
while ((m = unexpectedChars.exec(match[0]))) {
emitError(
context,
ErrorCodes.UNEXPECTED_CHARACTER_IN_UNQUOTED_ATTRIBUTE_VALUE,
m.index
)
}
content = parseTextData(context, match[0].length, TextModes.ATTRIBUTE_VALUE)
}
return { content, isQuoted, loc: getSelection(context, start) }
}
function parseInterpolation(
context: ParserContext,
mode: TextModes
): InterpolationNode | undefined {
const [open, close] = context.options.delimiters
__TEST__ && assert(startsWith(context.source, open))
const closeIndex = context.source.indexOf(close, open.length)
if (closeIndex === -1) {
emitError(context, ErrorCodes.X_MISSING_INTERPOLATION_END)
return undefined
}
const start = getCursor(context)
advanceBy(context, open.length)
const innerStart = getCursor(context)
const innerEnd = getCursor(context)
const rawContentLength = closeIndex - open.length
const rawContent = context.source.slice(0, rawContentLength)
const preTrimContent = parseTextData(context, rawContentLength, mode)
const content = preTrimContent.trim()
const startOffset = preTrimContent.indexOf(content)
if (startOffset > 0) {
advancePositionWithMutation(innerStart, rawContent, startOffset)
}
const endOffset =
rawContentLength - (preTrimContent.length - content.length - startOffset)
advancePositionWithMutation(innerEnd, rawContent, endOffset)
advanceBy(context, close.length)
return {
type: NodeTypes.INTERPOLATION,
content: {
type: NodeTypes.SIMPLE_EXPRESSION,
isStatic: false,
// Set `isConstant` to false by default and will decide in transformExpression
constType: ConstantTypes.NOT_CONSTANT,
content,
loc: getSelection(context, innerStart, innerEnd)
},
loc: getSelection(context, start)
}
}
function parseText(context: ParserContext, mode: TextModes): TextNode {
__TEST__ && assert(context.source.length > 0)
const endTokens =
mode === TextModes.CDATA ? [']]>'] : ['<', context.options.delimiters[0]]
let endIndex = context.source.length
for (let i = 0; i < endTokens.length; i++) {
const index = context.source.indexOf(endTokens[i], 1)
if (index !== -1 && endIndex > index) {
endIndex = index
}
}
__TEST__ && assert(endIndex > 0)
const start = getCursor(context)
const content = parseTextData(context, endIndex, mode)
return {
type: NodeTypes.TEXT,
content,
loc: getSelection(context, start)
}
}
/**
* Get text data with a given length from the current location.
* This translates HTML entities in the text data.
*/
function parseTextData(
context: ParserContext,
length: number,
mode: TextModes
): string {
const rawText = context.source.slice(0, length)
advanceBy(context, length)
if (
mode === TextModes.RAWTEXT ||
mode === TextModes.CDATA ||
!rawText.includes('&')
) {
return rawText
} else {
// DATA or RCDATA containing "&"". Entity decoding required.
return context.options.decodeEntities(
rawText,
mode === TextModes.ATTRIBUTE_VALUE
)
}
}
function getCursor(context: ParserContext): Position {
const { column, line, offset } = context
return { column, line, offset }
}
function getSelection(
context: ParserContext,
start: Position,
end?: Position
): SourceLocation {
end = end || getCursor(context)
return {
start,
end,
source: context.originalSource.slice(start.offset, end.offset)
}
}
function last<T>(xs: T[]): T | undefined {
return xs[xs.length - 1]
}
function startsWith(source: string, searchString: string): boolean {
return source.startsWith(searchString)
}
function advanceBy(context: ParserContext, numberOfCharacters: number): void {
const { source } = context
__TEST__ && assert(numberOfCharacters <= source.length)
advancePositionWithMutation(context, source, numberOfCharacters)
context.source = source.slice(numberOfCharacters)
}
function advanceSpaces(context: ParserContext): void {
const match = /^[\t\r\n\f ]+/.exec(context.source)
if (match) {
advanceBy(context, match[0].length)
}
}
function getNewPosition(
context: ParserContext,
start: Position,
numberOfCharacters: number
): Position {
return advancePositionWithClone(
start,
context.originalSource.slice(start.offset, numberOfCharacters),
numberOfCharacters
)
}
function emitError(
context: ParserContext,
code: ErrorCodes,
offset?: number,
loc: Position = getCursor(context)
): void {
if (offset) {
loc.offset += offset
loc.column += offset
}
context.options.onError(
createCompilerError(code, {
start: loc,
end: loc,
source: ''
})
)
}
function isEnd(
context: ParserContext,
mode: TextModes,
ancestors: ElementNode[]
): boolean {
const s = context.source
switch (mode) {
case TextModes.DATA:
if (startsWith(s, '</')) {
// TODO: probably bad performance
for (let i = ancestors.length - 1; i >= 0; --i) {
if (startsWithEndTagOpen(s, ancestors[i].tag)) {
return true
}
}
}
break
case TextModes.RCDATA:
case TextModes.RAWTEXT: {
const parent = last(ancestors)
if (parent && startsWithEndTagOpen(s, parent.tag)) {
return true
}
break
}
case TextModes.CDATA:
if (startsWith(s, ']]>')) {
return true
}
break
}
return !s
}
function startsWithEndTagOpen(source: string, tag: string): boolean {
return (
startsWith(source, '</') &&
source.slice(2, 2 + tag.length).toLowerCase() === tag.toLowerCase() &&
/[\t\r\n\f />]/.test(source[2 + tag.length] || '>')
)
}
|