From f5f0cbf1bca5c46430d8fe4482a56451e0d27986 Mon Sep 17 00:00:00 2001
From: yutent <yutent.io@gmail.com>
Date: Tue, 18 Oct 2022 16:02:29 +0800
Subject: [PATCH] =?UTF-8?q?=E5=A2=9E=E5=8A=A0scpoed=E7=89=B9=E6=80=A7?=
 =?UTF-8?q?=E7=9A=84=E6=94=AF=E6=8C=81?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 Readme.md          |  2 +-
 lib/compile-vue.js | 69 +++++++++++++++++++++++++++++++++++++++-------
 lib/constants.js   |  2 ++
 lib/dev.js         |  2 +-
 package.json       |  2 +-
 5 files changed, 64 insertions(+), 13 deletions(-)

diff --git a/Readme.md b/Readme.md
index a4614df..23c254b 100644
--- a/Readme.md
+++ b/Readme.md
@@ -20,7 +20,7 @@
 - 因为没有编译过程, 一切都是基于`vue esm runtime`实时解析, 所以性能会有一定的下降(那点性能损耗一般可以忽略)。
 - 因为没有打包, 所以所有的文件引用都是按源代码的结构, 对于源码的保护比较弱(虽然打包也没约等于没保护, 因为前端没秘密)。
 - 因为是用的是原生的`ESM`,所以引用的**依赖/文件**, 需要完整的路径, 不得省略后缀名, 更不能省略`index.js/index.vue`。
-- 因为没有专门处理样式, 所以原来的`scoped`不可用, 自行使用`命名空间`的方式实现样式隔离; 相应的, vue中的 `>>>、:deep、v-deep`等功能不可用。
+- 因为没有内置完整的样式处理, 所以`scoped特性`虽然支持, 但vue中的 `>>>、:deep、v-deep`等功能不可用。
 - `单文件组件`中的样式, 如果是用scss, 不支持引用其他文件, 也不支持设置共用定义文件。
 - 样式预处理器, 只支持scss, 不支持less。
 
diff --git a/lib/compile-vue.js b/lib/compile-vue.js
index 2664939..106a672 100644
--- a/lib/compile-vue.js
+++ b/lib/compile-vue.js
@@ -6,20 +6,56 @@
 
 import fs from 'iofs'
 import scss from '@bytedo/sass'
+import { createHash } from 'crypto'
 
-import { JS_EXP, STYLE_EXP, HTML_EXP } from './constants.js'
+import { JS_EXP, STYLE_EXP, HTML_EXP, CSS_SHEET_EXP } from './constants.js'
 
 const OPTIONS = {
   indentType: 'space',
   indentWidth: 2
 }
 
+function md5(str = '') {
+  let sum = createHash('md5')
+  sum.update(str, 'utf8')
+  return sum.digest('hex').slice(0, 8)
+}
+
+function scopeCss(css, hash) {
+  let rules = css.matchAll(CSS_SHEET_EXP)
+
+  return [...rules]
+    .map(r => {
+      let selector = r[1]
+      let style = r[2]
+      selector = selector.split(',')
+
+      selector = selector
+        .map(s => {
+          let tmp = s.split(' ')
+          let last = tmp.pop()
+          if (last.includes(':')) {
+            last = last.replace(':', `[data-${hash}]:`)
+          } else {
+            last += `[data-${hash}]`
+          }
+          tmp.push(last)
+          return tmp.join(' ')
+        })
+        .join(', ')
+
+      return selector + ` {${style}}`
+    })
+    .join('\n')
+}
+
 /**
  * 编译scss为css
  * @param file <String> 文件路径或scss代码
- * @param style <String> 代码风格, expanded | compressed
+ * @param mini <Boolean> 是否压缩
  */
-export function compileScss(file, style = 'expanded') {
+export function compileScss(file, mini = true) {
+  let style = mini ? 'compressed' : 'expanded'
   try {
     if (fs.isfile(file)) {
       return scss.compile(file, { style, ...OPTIONS }).css
@@ -117,11 +153,13 @@ export function compileVue(file, imports, options = {}, isBuild) {
   let html = code.match(HTML_EXP)
 
   let fixedStyle = '\n\n'
+  let hash = md5(file)
 
   // console.log(typeof scss)
-  scss = [...scss].flatMap(it => (it ? it[1] : ''))
+  scss = [...scss].map(it => [it[0], it[1]])
   js = js ? js[1] : ''
   html = (html ? html[1] : '').replace(/`/g, '\\`').replace(/\$\{/g, '\\${')
+  html = html.replace(/<([\w\-]+)([^>]*?)>/g, `<$1 data-${hash} $2>`)
 
   js = parseJs(js, imports, options, isBuild).replace(
     'export default {',
@@ -129,12 +167,23 @@ export function compileVue(file, imports, options = {}, isBuild) {
   )
 
   if (scss.length) {
-    js += `  
-  let stylesheet = new CSSStyleSheet()
-  stylesheet.path = '${file.slice(options.IS_MPA ? options.pagesDir.length : options.root.length)}'
-  stylesheet.replaceSync(\`${compileScss(scss.join('\n'))}\`)
-  document.adoptedStyleSheets.push(stylesheet)
-  `
+    scss = scss.map(it => {
+      let scoped = it[0].includes('scoped')
+      let css = compileScss(it[1])
+      if (scoped) {
+        return scopeCss(css, hash)
+      }
+      return css
+    })
+
+    js += `
+    let stylesheet = new CSSStyleSheet()
+    stylesheet.path = '${file.slice(
+      options.IS_MPA ? options.pagesDir.length : options.root.length
+    )}'
+    stylesheet.replaceSync(\`${scss.join('\n')}\`)
+    document.adoptedStyleSheets.push(stylesheet)
+    `
   }
 
   return js
diff --git a/lib/constants.js b/lib/constants.js
index 8b350f0..b56dae9 100644
--- a/lib/constants.js
+++ b/lib/constants.js
@@ -8,6 +8,8 @@ export const JS_EXP = /<script[^>]*?>([\w\W]*?)<\/script>/
 export const STYLE_EXP = /<style[^>]*?>([\w\W]*?)<\/style>/g
 export const HTML_EXP = /<template[^>]*?>([\w\W]*?)<\/template>/
 
+export const CSS_SHEET_EXP = /([\w\.,#\-:\(\)\[\]"'\=\s]+)\{([^\{\}]*?)\}/g
+
 export const COMMON_HEADERS = {
   'Cache-Control': 'no-store'
 }
diff --git a/lib/dev.js b/lib/dev.js
index f57468c..92a060e 100644
--- a/lib/dev.js
+++ b/lib/dev.js
@@ -43,7 +43,7 @@ export default function createServer(root = '', conf = {}) {
           currentPage = pageName
           pagesDir = dirname(conf.pages[pageName].entry)
         } else {
-          ext = pathname[pathname.length - 1].split('.').pop()
+          ext = pathname.at(-1).split('.').pop()
           pageName = currentPage
         }
         pathname = pathname.join('/')
diff --git a/package.json b/package.json
index 97dab1d..cb91232 100644
--- a/package.json
+++ b/package.json
@@ -1,7 +1,7 @@
 {
   "name": "@bytedo/vue-live",
   "type": "module",
-  "version": "0.0.5",
+  "version": "0.0.6",
   "bin": {
     "vue-live": "index.js"
   },