This commit is contained in:
theluyuan 2022-09-13 11:03:30 +08:00
parent fa6556a0d5
commit 05b8cc7469
8 changed files with 77 additions and 35 deletions

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@ -65,6 +65,7 @@ export function baseCompile(
const onError = options.onError || defaultOnError
const isModuleMode = options.mode === 'module'
/* istanbul ignore if */
// 只要不是 dev onError 就是空函数
if (__BROWSER__) {
if (options.prefixIdentifiers === true) {
onError(createCompilerError(ErrorCodes.X_PREFIX_ID_NOT_SUPPORTED))
@ -81,7 +82,7 @@ export function baseCompile(
if (options.scopeId && !isModuleMode) {
onError(createCompilerError(ErrorCodes.X_SCOPE_ID_NOT_SUPPORTED))
}
// 给options 赋初始值 如果不是字符串 直接返回 template
const ast = isString(template) ? baseParse(template, options) : template
const [nodeTransforms, directiveTransforms] =
getBaseTransformPreset(prefixIdentifiers)

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@ -67,17 +67,17 @@ const decodeMap: Record<string, string> = {
}
export const defaultParserOptions: MergedParserOptions = {
delimiters: [`{{`, `}}`],
getNamespace: () => Namespaces.HTML,
getTextMode: () => TextModes.DATA,
isVoidTag: NO,
isPreTag: NO,
isCustomElement: NO,
delimiters: [`{{`, `}}`], // 模板分割付
getNamespace: () => Namespaces.HTML, // HTML
getTextMode: () => TextModes.DATA, //DATA
isVoidTag: NO, // 无效标签
isPreTag: NO, // 是不是pre标签
isCustomElement: NO, // 是不是自定义标签
decodeEntities: (rawText: string): string =>
rawText.replace(decodeRE, (_, p1) => decodeMap[p1]),
rawText.replace(decodeRE, (_, p1) => decodeMap[p1]), // 讲实体字符转换成字符串
onError: defaultOnError,
onWarn: defaultOnWarn,
comments: __DEV__
comments: __DEV__ // ???
}
export const enum TextModes {
@ -105,8 +105,11 @@ export function baseParse(
content: string,
options: ParserOptions = {}
): RootNode {
// 给options 覆初始值 没有的属性都赋值进去
const context = createParserContext(content, options)
// 貌似获取的是固定的
const start = getCursor(context)
// create root
return createRoot(
parseChildren(context, TextModes.DATA, []),
getSelection(context, start)
@ -117,15 +120,12 @@ function createParserContext(
content: string,
rawOptions: ParserOptions
): ParserContext {
const options = extend({}, defaultParserOptions)
const options = extend({}, defaultParserOptions) // 这一行将所有defaultParserOptions属性复制给options
// 如果对象属性没有 讲使用默认的 defaultParserOptions
let key: keyof ParserOptions
for (key in rawOptions) {
// @ts-ignore
options[key] =
rawOptions[key] === undefined
? defaultParserOptions[key]
: rawOptions[key]
options[key] = rawOptions[key] === undefined ? defaultParserOptions[key] : rawOptions[key] // 当rawOptions key值是undefined的时候 给defaultParserOptionsde的值 不是unidentified 给 rawOptions的值
}
return {
options,
@ -139,24 +139,27 @@ function createParserContext(
onWarn: options.onWarn
}
}
// 解析标签
// ancestors 默认是空数组
function parseChildren(
context: ParserContext,
mode: TextModes,
ancestors: ElementNode[]
): TemplateChildNode[] {
// ancestors 获取最后一个元素 默认undefined
// mode DATA
const parent = last(ancestors)
const ns = parent ? parent.ns : Namespaces.HTML
const nodes: TemplateChildNode[] = []
const ns = parent ? parent.ns : Namespaces.HTML // 如果有 就取ns 没有 HTML
const nodes: TemplateChildNode[] = [] // ??创建列表
// 判断是不是结束标签
while (!isEnd(context, mode, ancestors)) {
__TEST__ && assert(context.source.length > 0)
const s = context.source
const s = context.source // html 代码
let node: TemplateChildNode | TemplateChildNode[] | undefined = undefined
if (mode === TextModes.DATA || mode === TextModes.RCDATA) {
if (!context.inVPre && startsWith(s, context.options.delimiters[0])) {
// '{{'
// 判断是不是'{{' 开头
node = parseInterpolation(context, mode)
} else if (mode === TextModes.DATA && s[0] === '<') {
// https://html.spec.whatwg.org/multipage/parsing.html#tag-open-state
@ -964,11 +967,12 @@ function parseInterpolation(
context: ParserContext,
mode: TextModes
): InterpolationNode | undefined {
const [open, close] = context.options.delimiters
__TEST__ && assert(startsWith(context.source, open))
const [open, close] = context.options.delimiters // open {{ close }}
__TEST__ && assert(startsWith(context.source, open)) // 是否为test
const closeIndex = context.source.indexOf(close, open.length)
const closeIndex = context.source.indexOf(close, open.length)// 获取结束位置
if (closeIndex === -1) {
// 找不到结束
emitError(context, ErrorCodes.X_MISSING_INTERPOLATION_END)
return undefined
}
@ -1057,6 +1061,7 @@ function parseTextData(
}
function getCursor(context: ParserContext): Position {
console.log(context)
const { column, line, offset } = context
return { column, line, offset }
}
@ -1067,6 +1072,7 @@ function getSelection(
end?: Position
): SourceLocation {
end = end || getCursor(context)
console.log(start,end)
return {
start,
end,
@ -1132,7 +1138,7 @@ function isEnd(
mode: TextModes,
ancestors: ElementNode[]
): boolean {
const s = context.source
const s = context.source // 原始html
switch (mode) {
case TextModes.DATA:

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@ -37,10 +37,14 @@ export const DOMDirectiveTransforms: Record<string, DirectiveTransform> = {
show: transformShow
}
// 生成语法树
export function compile(
template: string,
options: CompilerOptions = {}
): CodegenResult {
// template 模板
// options 不知道干啥的参数
// console.log(options)
return baseCompile(
template,
extend({}, parserOptions, options, {

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@ -756,6 +756,7 @@ let installWithProxy: (i: ComponentInternalInstance) => void
* For runtime-dom to register the compiler.
* Note the exported method uses any to avoid d.ts relying on the compiler types.
*/
//
export function registerRuntimeCompiler(_compile: any) {
compile = _compile
installWithProxy = i => {

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@ -14,6 +14,7 @@ export const vShow: ObjectDirective<VShowElement> = {
setDisplay(el, value)
}
},
// 监听器 属性复制
mounted(el, { value }, { transition }) {
if (transition && value) {
transition.enter(el)

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@ -21,24 +21,31 @@ import * as runtimeDom from '@vue/runtime-dom'
function wrappedCreateApp(...args: any[]) {
// @ts-ignore
// 兼容new Vue
const app = createApp(...args)
// todo: 是不是看内部组件是否兼容??
if (compatUtils.isCompatEnabled(DeprecationTypes.RENDER_FUNCTION, null)) {
// register built-in components so that they can be resolved via strings
// in the legacy h() call. The __compat__ prefix is to ensure that v3 h()
// doesn't get affected.
// 。注册内部组件
app.component('__compat__transition', Transition)
app.component('__compat__transition-group', TransitionGroup)
app.component('__compat__keep-alive', KeepAlive)
// built-in directives. No need for prefix since there's no render fn API
// for resolving directives via string in v3.
// v-show 实现
app._context.directives.show = vShow
// v-model 实现
app._context.directives.model = vModelDynamic
}
return app
}
export function createCompatVue() {
// 旧得全局构造函数????
const Vue = compatUtils.createCompatVue(createApp, wrappedCreateApp)
// 把所有runtimeDom里面的属性方法放到Vue里面
extend(Vue, runtimeDom)
return Vue
}

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@ -17,23 +17,31 @@ function compileToFunction(
template: string | HTMLElement,
options?: CompilerOptions
): RenderFunction {
// 不是string
if (!isString(template)) {
// 判断节点类型 没有就不是节点
if (template.nodeType) {
// 取内部的html代码
template = template.innerHTML
} else {
// 报错 返回一个空函数
__DEV__ && warn(`invalid template option: `, template)
return NOOP
}
}
const key = template
// 获取值
const cached = compileCache[key]
// 如果有值 直接返回缓存之前的
if (cached) {
return cached
}
// 判断第一个字符串是不是#
if (template[0] === '#') {
// 那么通过id 去选择元素
const el = document.querySelector(template)
// 如果获取不到
if (__DEV__ && !el) {
warn(`Template element not found or is empty: ${template}`)
}
@ -41,13 +49,14 @@ function compileToFunction(
// Reason: potential execution of JS expressions in in-DOM template.
// The user must make sure the in-DOM template is trusted. If it's rendered
// by the server, the template should not contain any user data.
// 获取的到 取内部的html
template = el ? el.innerHTML : ``
}
// 如果是 dev 不是test 不包含 options.whitespace 发出警告 压缩空白
if (__DEV__ && !__TEST__ && (!options || !options.whitespace)) {
warnDeprecation(DeprecationTypes.CONFIG_WHITESPACE, null)
}
// template html 模板
const { code } = compile(
template,
extend(
@ -89,9 +98,11 @@ function compileToFunction(
return (compileCache[key] = render)
}
// 为runtime-dom 注册编译器
registerRuntimeCompiler(compileToFunction)
// 创建vue 初始化属性 自带组件
const Vue = createCompatVue()
// 编译?函数
Vue.compile = compileToFunction
export default Vue

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@ -6,7 +6,7 @@ import { registerRuntimeCompiler, RenderFunction, warn } from '@vue/runtime-dom'
import * as runtimeDom from '@vue/runtime-dom'
import { isString, NOOP, generateCodeFrame, extend } from '@vue/shared'
import { InternalRenderFunction } from 'packages/runtime-core/src/component'
// 判断是不是调试模式
if (__DEV__) {
initDev()
}
@ -17,21 +17,27 @@ function compileToFunction(
template: string | HTMLElement,
options?: CompilerOptions
): RenderFunction {
// 判断是不是字符串
if (!isString(template)) {
// 不是字符串判断下有没有nodeType属性
if (template.nodeType) {
// 获取内部的html代码
template = template.innerHTML
} else {
// 报错 返回空函数
__DEV__ && warn(`invalid template option: `, template)
return NOOP
}
}
// key 等于传入末班
const key = template
// 获取缓存
const cached = compileCache[key]
// 有直接返回缓存
if (cached) {
return cached
}
// 判断是不是id
if (template[0] === '#') {
const el = document.querySelector(template)
if (__DEV__ && !el) {
@ -43,7 +49,10 @@ function compileToFunction(
// by the server, the template should not contain any user data.
template = el ? el.innerHTML : ``
}
// 合并传入的选项
// 添加 hoistStatic
// onError
// onWarn
const opts = extend(
{
hoistStatic: true,
@ -52,7 +61,9 @@ function compileToFunction(
} as CompilerOptions,
options
)
// ?? 不知道这个是干啥的
// 根不执行
console.log(opts.isCustomElement,customElements)
if (!opts.isCustomElement && typeof customElements !== 'undefined') {
opts.isCustomElement = tag => !!customElements.get(tag)
}