565 lines
9.0 KiB
Markdown
565 lines
9.0 KiB
Markdown
---
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title: 特性支持
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icon: majesticons:code-block-line
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createTime: 2024/04/04 10:41:28
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permalink: /guide/code/features/
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---
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主题在代码高亮功能上，进一步支持了更多的特性，它们能够帮助你的代码块更加具备表达力。
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## 代码块标题 <Badge type="tip" text="1.0.0-rc.136 +" />
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在 <code>\`\`\` [lang]</code> 之后添加 `title="xxxx"` ，可以为当前代码块添加标题
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**输入：**
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````md {1}
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```json title="package.json"
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{
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"name": "vuepress-theme-plume"
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}
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```
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````
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**输出：**
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```json title="package.json"
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{
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"name": "vuepress-theme-plume"
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}
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```
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## 代码行号
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主题默认显示代码行号，它通过 `codeHighlighter.line-numbers` 来控制。
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```ts title=".vuepress/config.ts"
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export default defineUserConfig({
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theme: plumeTheme({
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codeHighlighter: {
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lineNumbers: true, // [!code ++]
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}
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})
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})
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```
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你还可以通过 `:line-numbers` / `:no-line-numbers` 来控制当前代码块是否显示代码行号。
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还可以通过在 `:line-numbers` 之后添加 `=` 来自定义起始行号，例如 `:line-numbers=2` 表示代码块中的行号从 `2` 开始。
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**输入：**
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````md
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```ts:line-numbers
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// 启用行号
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const line2 = 'This is line 2'
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const line3 = 'This is line 3'
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```
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```ts:no-line-numbers
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// 行号已禁用
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const line3 = 'This is line 3'
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const line4 = 'This is line 4'
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```
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```ts:line-numbers=2
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// 行号已启用，并从 2 开始
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const line3 = 'This is line 3'
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const line4 = 'This is line 4'
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```
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````
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**输出：**
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```ts:line-numbers
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// 启用行号
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const line2 = 'This is line 2'
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const line3 = 'This is line 3'
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```
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```ts:no-line-numbers
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// 行号已禁用
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const line3 = 'This is line 3'
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const line4 = 'This is line 4'
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```
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```ts:line-numbers=2
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// 行号已启用，并从 2 开始
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const line3 = 'This is line 3'
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const line4 = 'This is line 4'
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```
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## 在代码块中实现行高亮
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在 `[lang]` 之后紧跟随 `{xxxx}` ，可以实现行高亮，其中 `xxx` 表示要高亮的行号。
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**输入：**
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````md
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```js{4}
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export default {
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data () {
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return {
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msg: 'Highlighted!'
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}
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}
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}
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```
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````
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**输出：**
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```js{4}
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export default {
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data () {
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return {
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msg: 'Highlighted!'
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}
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}
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}
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```
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除了单行之外，还可以指定多个单行、多行，或两者均指定：
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- 多行：例如 `{5-8}`、`{3-10}`、`{10-17}`
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- 多个单行：例如 `{4,7,9}`
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- 多行与单行：例如 `{4,7-13,16,23-27,40}`
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**输入：**
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````md
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```js{1,4,6-8}
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export default { // Highlighted
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data () {
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return {
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msg: `Highlighted!
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This line isn't highlighted,
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but this and the next 2 are.`,
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motd: 'VitePress is awesome',
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lorem: 'ipsum'
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}
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}
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}
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```
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````
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**输出：**
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```js{1,4,6-8}
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export default { // Highlighted
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data () {
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return {
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msg: `Highlighted!
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This line isn't highlighted,
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but this and the next 2 are.`,
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motd: 'VitePress is awesome',
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lorem: 'ipsum'
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}
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}
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}
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```
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也可以使用 `// [!code highlight]` 注释实现行高亮。
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**输入：**
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````md
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```js
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export default {
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data() {
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return {
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msg: 'Highlighted!' // [\!code highlight]
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}
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}
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}
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```
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````
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**输出：**
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```js
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export default {
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data() {
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return {
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msg: 'Highlighted!' // [!code highlight]
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}
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}
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}
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```
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## 代码块中聚焦
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在某一行上添加 `// [!code focus]` 注释将聚焦它并模糊代码的其他部分。
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此外，可以使用 `// [!code focus:<lines>]` 定义要聚焦的行数。
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**输入：**
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````md
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```js
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export default {
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data() {
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return {
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msg: 'Focused!' // [\!code focus]
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}
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}
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}
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```
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````
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**输出：**
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```js
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export default {
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data() {
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return {
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msg: 'Focused!' // [!code focus]
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}
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}
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}
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```
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::: tip 在不同的语言代码块中，应该使用该语言的有效的行注释语法
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比如在 bash 代码块中，应该使用 `# [!code focus]`
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````md
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```bash
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mkdir hello && cd hello # [\!code focus]
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pnpm install
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```
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````
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```bash
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mkdir hello && cd hello # [!code focus]
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pnpm install
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```
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:::
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## 代码块中的颜色差异
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在某一行添加 `// [!code --]` 或 `// [!code ++]` 注释将会为该行创建 diff，同时保留代码块的颜色。
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**输入：**
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````md
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```js
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export default {
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data() {
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return {
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error: 'Removed', // [\!code --]
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warning: 'Added' // [\!code ++]
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}
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}
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}
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```
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````
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**输出：**
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```js
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export default {
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data() {
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return {
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error: 'Removed', // [!code --]
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warning: 'Added' // [!code ++]
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}
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}
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}
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```
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::: tip 在不同的语言代码块中，应该使用该语言的有效的行注释语法
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比如在 bash 代码块中，应该使用 `# [!code ++]`
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````md
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```bash
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mkdir hello && cd hello # [\!code ++]
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```
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````
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```bash
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mkdir hello && cd hello # [!code ++]
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```
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:::
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## 高亮“错误”和“警告”
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在某一行添加 `// [!code warning]` 或 `// [!code error]` 注释将会为该行相应的着色。
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**输入：**
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````md
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```js
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export default {
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data() {
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return {
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error: 'Error', // [\!code error]
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warning: 'Warning' // [\!code warning]
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}
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}
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}
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```
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````
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**输出：**
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```js
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export default {
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data() {
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return {
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error: 'Error', // [!code error]
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warning: 'Warning' // [!code warning]
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}
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}
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}
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```
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::: tip 在不同的语言代码块中，应该使用该语言的有效的行注释语法
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比如在 bash 代码块中，应该使用 `# [!code warning]`
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````md
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```bash
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mkdir hello && cd hello # [\!code warning]
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```
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````
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```bash
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mkdir hello && cd hello # [!code warning]
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```
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:::
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## 代码块中 词高亮
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**输入：**
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````md
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```ts
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export function foo() { // [\!code word:Hello]
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const msg = 'Hello World'
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console.log(msg) // prints Hello World
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}
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```
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````
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**输出：**
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```ts
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export function foo() { // [!code word:Hello]
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const msg = 'Hello World'
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console.log(msg) // prints Hello World
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}
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```
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你还可以指定高亮显示的次数，例如 `[!code word:options:2]` 会高亮显示近两个 `options`。
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**输入：**
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````md
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```ts
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// [\!code word:options:2]
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const options = { foo: 'bar' }
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options.foo = 'baz'
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console.log(options.foo) // 这个不会被高亮显示
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```
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````
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**输出：**
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```ts
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// [!code word:options:2]
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const options = { foo: 'bar' }
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options.foo = 'baz'
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console.log(options.foo) // 这个不会被高亮显示
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```
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:::tip 在不同的语言代码块中，应该使用该语言的有效的行注释语法
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比如在 bash 代码块中，应该使用 `# [!code word:hello]`
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````md
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```bash
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mkdir hello && cd hello # [\!code word:hello]
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```
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````
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```bash
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mkdir hello && cd hello # [!code word:hello]
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```
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:::
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## 代码块中的 空白符
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将空白字符（Tab 和空格）渲染为可见状态。
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在 代码块 后面添加 `:whitespace`。
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<!-- @include: ../../snippet/whitespace.snippet.md -->
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还可以在 `codeHighlighter` 中全局启用 `whitespace` 功能：
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```ts title=".vuepress/config.ts"
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export default defineUserConfig({
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theme: plumeTheme({
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codeHighlighter: {
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whitespace: true, // [!code ++]
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}
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})
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})
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```
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全局启用时，可以使用 `:no-whitespace` 来单独为某一代码块禁用 `whitespace` 功能。
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## 折叠代码块
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有时候，代码块会很长，对于阅读其它部分的内容时，会显得很麻烦，影响阅读体验，这时候可以折叠代码块。
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在 代码块 后面添加 `:collapsed-lines`，即可折叠代码块，默认从第 15 行开始折叠。
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**输入：**
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````txt
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```css :collapsed-lines
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html {
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margin: 0;
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background: black;
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height: 100%;
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}
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... more code
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```
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````
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**输出：**
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```css :collapsed-lines
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html {
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margin: 0;
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background: black;
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height: 100%;
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}
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body {
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margin: 0;
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width: 100%;
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height: inherit;
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}
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/* the three main rows going down the page */
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body > div {
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height: 25%;
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}
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.thumb {
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float: left;
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width: 25%;
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height: 100%;
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object-fit: cover;
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}
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.main {
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display: none;
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}
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.blowup {
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display: block;
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position: absolute;
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object-fit: contain;
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object-position: center;
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top: 0;
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left: 0;
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width: 100%;
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height: 100%;
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z-index: 2000;
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}
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.darken {
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opacity: 0.4;
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}
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```
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还可以指定起始折叠行。`:collapsed-lines=10` 表示从第十行开始折叠。
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**输入：**
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````txt
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```css :collapsed-lines=10
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html {
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margin: 0;
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background: black;
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height: 100%;
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}
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... more code
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```
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````
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**输出：**
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```css :collapsed-lines=10
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html {
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margin: 0;
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background: black;
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height: 100%;
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}
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body {
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margin: 0;
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width: 100%;
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height: inherit;
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}
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/* the three main rows going down the page */
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body > div {
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height: 25%;
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}
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.thumb {
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float: left;
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width: 25%;
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height: 100%;
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object-fit: cover;
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}
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.main {
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display: none;
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}
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.blowup {
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display: block;
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position: absolute;
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object-fit: contain;
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object-position: center;
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top: 0;
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left: 0;
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width: 100%;
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height: 100%;
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z-index: 2000;
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}
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.darken {
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opacity: 0.4;
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}
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```
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还可以在 `codeHighlighter` 中全局启用 `collapsed-lines` 功能：
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|
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::: code-tabs
|
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@tab .vuepress/config.ts
|
||
|
||
```ts
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export default defineUserConfig({
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theme: plumeTheme({
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codeHighlighter: {
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collapsedLines: true // [!code ++]
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}
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})
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})
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```
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:::
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全局启用时，可以使用 `:no-collapsed-lines` 来单独为某一代码块禁用 `collapsed-lines` 功能。
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