refactor(editor): unify directories naming (#11516)

**Directory Structure Changes**

- Renamed multiple block-related directories by removing the "block-" prefix:
  - `block-attachment` → `attachment`
  - `block-bookmark` → `bookmark`
  - `block-callout` → `callout`
  - `block-code` → `code`
  - `block-data-view` → `data-view`
  - `block-database` → `database`
  - `block-divider` → `divider`
  - `block-edgeless-text` → `edgeless-text`
  - `block-embed` → `embed`

blocksuite/affine/blocks/code/src/adapters/extension.ts

@@ -0,0 +1,13 @@
+import type { ExtensionType } from '@blocksuite/store';
+
+import { CodeBlockHtmlAdapterExtension } from './html.js';
+import { CodeBlockMarkdownAdapterExtensions } from './markdown/index.js';
+import { CodeBlockNotionHtmlAdapterExtension } from './notion-html.js';
+import { CodeBlockPlainTextAdapterExtension } from './plain-text.js';
+
+export const CodeBlockAdapterExtensions: ExtensionType[] = [
+  CodeBlockHtmlAdapterExtension,
+  CodeBlockMarkdownAdapterExtensions,
+  CodeBlockPlainTextAdapterExtension,
+  CodeBlockNotionHtmlAdapterExtension,
+].flat();

blocksuite/affine/blocks/code/src/adapters/html.ts

@@ -0,0 +1,96 @@
+import { CodeBlockSchema } from '@blocksuite/affine-model';
+import {
+  BlockHtmlAdapterExtension,
+  type BlockHtmlAdapterMatcher,
+  CODE_BLOCK_WRAP_KEY,
+  HastUtils,
+} from '@blocksuite/affine-shared/adapters';
+import type { DeltaInsert } from '@blocksuite/store';
+import { nanoid } from '@blocksuite/store';
+import { bundledLanguagesInfo, codeToHast } from 'shiki';
+
+export const codeBlockHtmlAdapterMatcher: BlockHtmlAdapterMatcher = {
+  flavour: CodeBlockSchema.model.flavour,
+  toMatch: o => HastUtils.isElement(o.node) && o.node.tagName === 'pre',
+  fromMatch: o => o.node.flavour === 'affine:code',
+  toBlockSnapshot: {
+    enter: (o, context) => {
+      if (!HastUtils.isElement(o.node)) {
+        return;
+      }
+      const code = HastUtils.querySelector(o.node, 'code');
+      if (!code) {
+        return;
+      }
+
+      const codeText =
+        code.children.length === 1 && code.children[0].type === 'text'
+          ? code.children[0]
+          : { ...code, tagName: 'div' };
+      let codeLang = Array.isArray(code.properties?.className)
+        ? code.properties.className.find(
+            className =>
+              typeof className === 'string' && className.startsWith('code-')
+          )
+        : undefined;
+      codeLang =
+        typeof codeLang === 'string'
+          ? codeLang.replace('code-', '')
+          : undefined;
+
+      const { walkerContext, deltaConverter, configs } = context;
+      const wrap = configs.get(CODE_BLOCK_WRAP_KEY) === 'true';
+      walkerContext
+        .openNode(
+          {
+            type: 'block',
+            id: nanoid(),
+            flavour: 'affine:code',
+            props: {
+              language: codeLang ?? 'Plain Text',
+              wrap,
+              text: {
+                '$blocksuite:internal:text$': true,
+                delta: deltaConverter.astToDelta(codeText, {
+                  trim: false,
+                  pre: true,
+                }),
+              },
+            },
+            children: [],
+          },
+          'children'
+        )
+        .closeNode();
+      walkerContext.skipAllChildren();
+    },
+  },
+  fromBlockSnapshot: {
+    enter: async (o, context) => {
+      const { walkerContext } = context;
+      const rawLang = o.node.props.language as string | null;
+      const matchedLang = rawLang
+        ? (bundledLanguagesInfo.find(
+            info =>
+              info.id === rawLang ||
+              info.name === rawLang ||
+              info.aliases?.includes(rawLang)
+          )?.id ?? 'text')
+        : 'text';
+
+      const text = (o.node.props.text as Record<string, unknown>)
+        .delta as DeltaInsert[];
+      const code = text.map(delta => delta.insert).join('');
+      const hast = await codeToHast(code, {
+        lang: matchedLang,
+        theme: 'light-plus',
+      });
+
+      walkerContext.openNode(hast as never, 'children').closeNode();
+    },
+  },
+};
+
+export const CodeBlockHtmlAdapterExtension = BlockHtmlAdapterExtension(
+  codeBlockHtmlAdapterMatcher
+);

blocksuite/affine/blocks/code/src/adapters/index.ts

@@ -0,0 +1,4 @@
+export * from './html.js';
+export * from './markdown/index.js';
+export * from './notion-html.js';
+export * from './plain-text.js';

blocksuite/affine/blocks/code/src/adapters/markdown/index.ts

@@ -0,0 +1,12 @@
+import type { ExtensionType } from '@blocksuite/store';
+
+import { CodeBlockMarkdownAdapterExtension } from './markdown.js';
+import { CodeMarkdownPreprocessorExtension } from './preprocessor.js';
+
+export * from './markdown.js';
+export * from './preprocessor.js';
+
+export const CodeBlockMarkdownAdapterExtensions: ExtensionType[] = [
+  CodeMarkdownPreprocessorExtension,
+  CodeBlockMarkdownAdapterExtension,
+];

blocksuite/affine/blocks/code/src/adapters/markdown/markdown.ts

@@ -0,0 +1,73 @@
+import { CodeBlockSchema } from '@blocksuite/affine-model';
+import {
+  BlockMarkdownAdapterExtension,
+  type BlockMarkdownAdapterMatcher,
+  CODE_BLOCK_WRAP_KEY,
+  type MarkdownAST,
+} from '@blocksuite/affine-shared/adapters';
+import type { DeltaInsert } from '@blocksuite/store';
+import { nanoid } from '@blocksuite/store';
+import type { Code } from 'mdast';
+
+const isCodeNode = (node: MarkdownAST): node is Code => node.type === 'code';
+
+export const codeBlockMarkdownAdapterMatcher: BlockMarkdownAdapterMatcher = {
+  flavour: CodeBlockSchema.model.flavour,
+  toMatch: o => isCodeNode(o.node),
+  fromMatch: o => o.node.flavour === 'affine:code',
+  toBlockSnapshot: {
+    enter: (o, context) => {
+      if (!isCodeNode(o.node)) {
+        return;
+      }
+      const { walkerContext, configs } = context;
+      const wrap = configs.get(CODE_BLOCK_WRAP_KEY) === 'true';
+      walkerContext
+        .openNode(
+          {
+            type: 'block',
+            id: nanoid(),
+            flavour: 'affine:code',
+            props: {
+              language: o.node.lang ?? 'Plain Text',
+              wrap,
+              text: {
+                '$blocksuite:internal:text$': true,
+                delta: [
+                  {
+                    insert: o.node.value,
+                  },
+                ],
+              },
+            },
+            children: [],
+          },
+          'children'
+        )
+        .closeNode();
+    },
+  },
+  fromBlockSnapshot: {
+    enter: (o, context) => {
+      const text = (o.node.props.text ?? { delta: [] }) as {
+        delta: DeltaInsert[];
+      };
+      const { walkerContext } = context;
+      walkerContext
+        .openNode(
+          {
+            type: 'code',
+            lang: (o.node.props.language as string) ?? null,
+            meta: null,
+            value: text.delta.map(delta => delta.insert).join(''),
+          },
+          'children'
+        )
+        .closeNode();
+    },
+  },
+};
+
+export const CodeBlockMarkdownAdapterExtension = BlockMarkdownAdapterExtension(
+  codeBlockMarkdownAdapterMatcher
+);

blocksuite/affine/blocks/code/src/adapters/markdown/preprocessor.ts

@@ -0,0 +1,76 @@
+import {
+  type MarkdownAdapterPreprocessor,
+  MarkdownPreprocessorExtension,
+} from '@blocksuite/affine-shared/adapters';
+
+const codePreprocessor: MarkdownAdapterPreprocessor = {
+  name: 'code',
+  levels: ['slice'],
+  preprocess: content => {
+    let codeFence = '';
+    const lines = content
+      .split('\n')
+      .map(line => {
+        if (line.trimStart().startsWith('-')) {
+          return line;
+        }
+        let trimmedLine = line.trimStart();
+        if (!codeFence && trimmedLine.startsWith('```')) {
+          codeFence = trimmedLine.substring(
+            0,
+            trimmedLine.lastIndexOf('```') + 3
+          );
+          if (codeFence.split('').every(c => c === '`')) {
+            return line;
+          }
+          codeFence = '';
+        }
+        if (!codeFence && trimmedLine.startsWith('~~~')) {
+          codeFence = trimmedLine.substring(
+            0,
+            trimmedLine.lastIndexOf('~~~') + 3
+          );
+          if (codeFence.split('').every(c => c === '~')) {
+            return line;
+          }
+          codeFence = '';
+        }
+        if (
+          !!codeFence &&
+          trimmedLine.startsWith(codeFence) &&
+          trimmedLine.lastIndexOf(codeFence) === 0
+        ) {
+          codeFence = '';
+        }
+        if (codeFence) {
+          return line;
+        }
+
+        trimmedLine = trimmedLine.trimEnd();
+        if (!trimmedLine.startsWith('<') && !trimmedLine.endsWith('>')) {
+          // check if it is a url link and wrap it with the angle brackets
+          // sometimes the url includes emphasis `_` that will break URL parsing
+          //
+          // eg. /MuawcBMT1Mzvoar09-_66?mode=page&blockIds=rL2_GXbtLU2SsJVfCSmh_
+          // https://www.markdownguide.org/basic-syntax/#urls-and-email-addresses
+          try {
+            const valid =
+              URL.canParse?.(trimmedLine) ?? Boolean(new URL(trimmedLine));
+            if (valid) {
+              return `<${trimmedLine}>`;
+            }
+          } catch (err) {
+            console.log(err);
+          }
+        }
+
+        return line.replace(/^ /, '&#x20;');
+      })
+      .join('\n');
+
+    return lines;
+  },
+};
+
+export const CodeMarkdownPreprocessorExtension =
+  MarkdownPreprocessorExtension(codePreprocessor);

blocksuite/affine/blocks/code/src/adapters/notion-html.ts

@@ -0,0 +1,59 @@
+import { CodeBlockSchema } from '@blocksuite/affine-model';
+import {
+  BlockNotionHtmlAdapterExtension,
+  type BlockNotionHtmlAdapterMatcher,
+  CODE_BLOCK_WRAP_KEY,
+  HastUtils,
+} from '@blocksuite/affine-shared/adapters';
+import { nanoid } from '@blocksuite/store';
+
+export const codeBlockNotionHtmlAdapterMatcher: BlockNotionHtmlAdapterMatcher =
+  {
+    flavour: CodeBlockSchema.model.flavour,
+    toMatch: o => HastUtils.isElement(o.node) && o.node.tagName === 'pre',
+    fromMatch: () => false,
+    toBlockSnapshot: {
+      enter: (o, context) => {
+        if (!HastUtils.isElement(o.node)) {
+          return;
+        }
+        const code = HastUtils.querySelector(o.node, 'code');
+        if (!code) {
+          return;
+        }
+        const { walkerContext, deltaConverter, configs } = context;
+        const wrap = configs.get(CODE_BLOCK_WRAP_KEY) === 'true';
+        const codeText =
+          code.children.length === 1 && code.children[0].type === 'text'
+            ? code.children[0]
+            : { ...code, tag: 'div' };
+        walkerContext
+          .openNode(
+            {
+              type: 'block',
+              id: nanoid(),
+              flavour: CodeBlockSchema.model.flavour,
+              props: {
+                language: 'Plain Text',
+                wrap,
+                text: {
+                  '$blocksuite:internal:text$': true,
+                  delta: deltaConverter.astToDelta(codeText, {
+                    trim: false,
+                    pre: true,
+                  }),
+                },
+              },
+              children: [],
+            },
+            'children'
+          )
+          .closeNode();
+        walkerContext.skipAllChildren();
+      },
+    },
+    fromBlockSnapshot: {},
+  };
+
+export const CodeBlockNotionHtmlAdapterExtension =
+  BlockNotionHtmlAdapterExtension(codeBlockNotionHtmlAdapterMatcher);

blocksuite/affine/blocks/code/src/adapters/plain-text.ts

@@ -0,0 +1,26 @@
+import { CodeBlockSchema } from '@blocksuite/affine-model';
+import {
+  BlockPlainTextAdapterExtension,
+  type BlockPlainTextAdapterMatcher,
+} from '@blocksuite/affine-shared/adapters';
+import type { DeltaInsert } from '@blocksuite/store';
+
+export const codeBlockPlainTextAdapterMatcher: BlockPlainTextAdapterMatcher = {
+  flavour: CodeBlockSchema.model.flavour,
+  toMatch: () => false,
+  fromMatch: o => o.node.flavour === CodeBlockSchema.model.flavour,
+  toBlockSnapshot: {},
+  fromBlockSnapshot: {
+    enter: (o, context) => {
+      const text = (o.node.props.text ?? { delta: [] }) as {
+        delta: DeltaInsert[];
+      };
+      const buffer = text.delta.map(delta => delta.insert).join('');
+      context.textBuffer.content += buffer;
+      context.textBuffer.content += '\n';
+    },
+  },
+};
+
+export const CodeBlockPlainTextAdapterExtension =
+  BlockPlainTextAdapterExtension(codeBlockPlainTextAdapterMatcher);

blocksuite/affine/blocks/code/src/code-block-config.ts

@@ -0,0 +1,19 @@
+import { ConfigExtensionFactory } from '@blocksuite/std';
+import type { BundledLanguageInfo, ThemeInput } from 'shiki';
+
+export interface CodeBlockConfig {
+  theme?: {
+    dark?: ThemeInput;
+    light?: ThemeInput;
+  };
+  langs?: BundledLanguageInfo[];
+
+  /**
+   * Whether to show line numbers in the code block.
+   * @default true
+   */
+  showLineNumbers?: boolean;
+}
+
+export const CodeBlockConfigExtension =
+  ConfigExtensionFactory<CodeBlockConfig>('affine:code');

blocksuite/affine/blocks/code/src/code-block-inline.ts

@@ -0,0 +1,46 @@
+import { LatexInlineSpecExtension } from '@blocksuite/affine-inline-latex';
+import { LinkInlineSpecExtension } from '@blocksuite/affine-inline-link';
+import {
+  BackgroundInlineSpecExtension,
+  BoldInlineSpecExtension,
+  CodeInlineSpecExtension,
+  ColorInlineSpecExtension,
+  ItalicInlineSpecExtension,
+  StrikeInlineSpecExtension,
+  UnderlineInlineSpecExtension,
+} from '@blocksuite/affine-inline-preset';
+import type { AffineTextAttributes } from '@blocksuite/affine-shared/types';
+import {
+  InlineManagerExtension,
+  InlineSpecExtension,
+} from '@blocksuite/std/inline';
+import { html } from 'lit';
+import { z } from 'zod';
+
+export const CodeBlockUnitSpecExtension =
+  InlineSpecExtension<AffineTextAttributes>({
+    name: 'code-block-unit',
+    schema: z.undefined(),
+    match: () => true,
+    renderer: ({ delta }) => {
+      return html`<affine-code-unit .delta=${delta}></affine-code-unit>`;
+    },
+  });
+
+export const CodeBlockInlineManagerExtension =
+  InlineManagerExtension<AffineTextAttributes>({
+    id: 'CodeBlockInlineManager',
+    enableMarkdown: false,
+    specs: [
+      BoldInlineSpecExtension.identifier,
+      ItalicInlineSpecExtension.identifier,
+      UnderlineInlineSpecExtension.identifier,
+      StrikeInlineSpecExtension.identifier,
+      CodeInlineSpecExtension.identifier,
+      BackgroundInlineSpecExtension.identifier,
+      ColorInlineSpecExtension.identifier,
+      LatexInlineSpecExtension.identifier,
+      LinkInlineSpecExtension.identifier,
+      CodeBlockUnitSpecExtension.identifier,
+    ],
+  });

blocksuite/affine/blocks/code/src/code-block-service.ts

@@ -0,0 +1,69 @@
+import { ColorScheme } from '@blocksuite/affine-model';
+import { ThemeProvider } from '@blocksuite/affine-shared/services';
+import { LifeCycleWatcher } from '@blocksuite/std';
+import { type Signal, signal } from '@preact/signals-core';
+import {
+  createHighlighterCore,
+  createOnigurumaEngine,
+  type HighlighterCore,
+  type MaybeGetter,
+} from 'shiki';
+import getWasm from 'shiki/wasm';
+
+import { CodeBlockConfigExtension } from './code-block-config.js';
+import {
+  CODE_BLOCK_DEFAULT_DARK_THEME,
+  CODE_BLOCK_DEFAULT_LIGHT_THEME,
+} from './highlight/const.js';
+
+export class CodeBlockHighlighter extends LifeCycleWatcher {
+  static override key = 'code-block-highlighter';
+
+  private _darkThemeKey: string | undefined;
+
+  private _lightThemeKey: string | undefined;
+
+  highlighter$: Signal<HighlighterCore | null> = signal(null);
+
+  get themeKey() {
+    const theme = this.std.get(ThemeProvider).theme$.value;
+    return theme === ColorScheme.Dark
+      ? this._darkThemeKey
+      : this._lightThemeKey;
+  }
+
+  private readonly _loadTheme = async (
+    highlighter: HighlighterCore
+  ): Promise<void> => {
+    const config = this.std.getOptional(CodeBlockConfigExtension.identifier);
+    const darkTheme = config?.theme?.dark ?? CODE_BLOCK_DEFAULT_DARK_THEME;
+    const lightTheme = config?.theme?.light ?? CODE_BLOCK_DEFAULT_LIGHT_THEME;
+    this._darkThemeKey = (await normalizeGetter(darkTheme)).name;
+    this._lightThemeKey = (await normalizeGetter(lightTheme)).name;
+    await highlighter.loadTheme(darkTheme, lightTheme);
+    this.highlighter$.value = highlighter;
+  };
+
+  override mounted(): void {
+    super.mounted();
+
+    createHighlighterCore({
+      engine: createOnigurumaEngine(() => getWasm),
+    })
+      .then(this._loadTheme)
+      .catch(console.error);
+  }
+
+  override unmounted(): void {
+    this.highlighter$.value?.dispose();
+  }
+}
+
+/**
+ * https://github.com/shikijs/shiki/blob/933415cdc154fe74ccfb6bbb3eb6a7b7bf183e60/packages/core/src/internal.ts#L31
+ */
+export async function normalizeGetter<T>(p: MaybeGetter<T>): Promise<T> {
+  return Promise.resolve(typeof p === 'function' ? (p as any)() : p).then(
+    r => r.default || r
+  );
+}

blocksuite/affine/blocks/code/src/code-block-spec.ts

@@ -0,0 +1,36 @@
+import { SlashMenuConfigExtension } from '@blocksuite/affine-widget-slash-menu';
+import {
+  BlockViewExtension,
+  FlavourExtension,
+  WidgetViewExtension,
+} from '@blocksuite/std';
+import type { ExtensionType } from '@blocksuite/store';
+import { literal, unsafeStatic } from 'lit/static-html.js';
+
+import { CodeBlockAdapterExtensions } from './adapters/extension.js';
+import {
+  CodeBlockInlineManagerExtension,
+  CodeBlockUnitSpecExtension,
+} from './code-block-inline.js';
+import { CodeBlockHighlighter } from './code-block-service.js';
+import { CodeKeymapExtension } from './code-keymap.js';
+import { AFFINE_CODE_TOOLBAR_WIDGET } from './code-toolbar/index.js';
+import { codeSlashMenuConfig } from './configs/slash-menu.js';
+
+export const codeToolbarWidget = WidgetViewExtension(
+  'affine:code',
+  AFFINE_CODE_TOOLBAR_WIDGET,
+  literal`${unsafeStatic(AFFINE_CODE_TOOLBAR_WIDGET)}`
+);
+
+export const CodeBlockSpec: ExtensionType[] = [
+  FlavourExtension('affine:code'),
+  CodeBlockHighlighter,
+  BlockViewExtension('affine:code', literal`affine-code`),
+  codeToolbarWidget,
+  CodeBlockInlineManagerExtension,
+  CodeBlockUnitSpecExtension,
+  CodeBlockAdapterExtensions,
+  SlashMenuConfigExtension('affine:code', codeSlashMenuConfig),
+  CodeKeymapExtension,
+].flat();

blocksuite/affine/blocks/code/src/code-block.ts

@@ -0,0 +1,445 @@
+import { CaptionedBlockComponent } from '@blocksuite/affine-components/caption';
+import type { CodeBlockModel } from '@blocksuite/affine-model';
+import { focusTextModel, type RichText } from '@blocksuite/affine-rich-text';
+import {
+  BRACKET_PAIRS,
+  EDGELESS_TOP_CONTENTEDITABLE_SELECTOR,
+} from '@blocksuite/affine-shared/consts';
+import {
+  DocModeProvider,
+  NotificationProvider,
+} from '@blocksuite/affine-shared/services';
+import { getViewportElement } from '@blocksuite/affine-shared/utils';
+import { IS_MAC, IS_MOBILE } from '@blocksuite/global/env';
+import { noop } from '@blocksuite/global/utils';
+import type { BlockComponent } from '@blocksuite/std';
+import { BlockSelection, TextSelection } from '@blocksuite/std';
+import {
+  getInlineRangeProvider,
+  INLINE_ROOT_ATTR,
+  type InlineRangeProvider,
+  type InlineRootElement,
+  type VLine,
+} from '@blocksuite/std/inline';
+import { Slice } from '@blocksuite/store';
+import { computed, effect, type Signal, signal } from '@preact/signals-core';
+import { html, nothing, type TemplateResult } from 'lit';
+import { query } from 'lit/decorators.js';
+import { classMap } from 'lit/directives/class-map.js';
+import { bundledLanguagesInfo, type ThemedToken } from 'shiki';
+
+import { CodeBlockConfigExtension } from './code-block-config.js';
+import { CodeBlockInlineManagerExtension } from './code-block-inline.js';
+import { CodeBlockHighlighter } from './code-block-service.js';
+import { codeBlockStyles } from './styles.js';
+
+export class CodeBlockComponent extends CaptionedBlockComponent<CodeBlockModel> {
+  static override styles = codeBlockStyles;
+
+  private _inlineRangeProvider: InlineRangeProvider | null = null;
+
+  highlightTokens$: Signal<ThemedToken[][]> = signal([]);
+
+  languageName$: Signal<string> = computed(() => {
+    const lang = this.model.props.language$.value;
+    if (lang === null) {
+      return 'Plain Text';
+    }
+
+    const matchedInfo = this.langs.find(info => info.id === lang);
+    return matchedInfo ? matchedInfo.name : 'Plain Text';
+  });
+
+  get inlineEditor() {
+    const inlineRoot = this.querySelector<InlineRootElement>(
+      `[${INLINE_ROOT_ATTR}]`
+    );
+    return inlineRoot?.inlineEditor;
+  }
+
+  get inlineManager() {
+    return this.std.get(CodeBlockInlineManagerExtension.identifier);
+  }
+
+  get notificationService() {
+    return this.std.getOptional(NotificationProvider);
+  }
+
+  get readonly() {
+    return this.doc.readonly;
+  }
+
+  get langs() {
+    return (
+      this.std.getOptional(CodeBlockConfigExtension.identifier)?.langs ??
+      bundledLanguagesInfo
+    );
+  }
+
+  get highlighter() {
+    return this.std.get(CodeBlockHighlighter);
+  }
+
+  override get topContenteditableElement() {
+    if (this.std.get(DocModeProvider).getEditorMode() === 'edgeless') {
+      return this.closest<BlockComponent>(
+        EDGELESS_TOP_CONTENTEDITABLE_SELECTOR
+      );
+    }
+    return this.rootComponent;
+  }
+
+  private _updateHighlightTokens() {
+    const modelLang = this.model.props.language$.value;
+    if (modelLang === null) {
+      this.highlightTokens$.value = [];
+      return;
+    }
+
+    const matchedInfo = this.langs.find(
+      info =>
+        info.id === modelLang ||
+        info.name === modelLang ||
+        info.aliases?.includes(modelLang)
+    );
+
+    if (matchedInfo) {
+      this.model.props.language$.value = matchedInfo.id;
+      const langImport = matchedInfo.import;
+      const lang = matchedInfo.id;
+
+      const highlighter = this.highlighter.highlighter$.value;
+      const theme = this.highlighter.themeKey;
+      if (!theme || !highlighter) {
+        this.highlightTokens$.value = [];
+        return;
+      }
+
+      noop(this.model.props.text.deltas$.value);
+      const code = this.model.props.text.toString();
+
+      const loadedLanguages = highlighter.getLoadedLanguages();
+      if (!loadedLanguages.includes(lang)) {
+        highlighter
+          .loadLanguage(langImport)
+          .then(() => {
+            this.highlightTokens$.value = highlighter.codeToTokensBase(code, {
+              lang,
+              theme,
+            });
+          })
+          .catch(console.error);
+      } else {
+        this.highlightTokens$.value = highlighter.codeToTokensBase(code, {
+          lang,
+          theme,
+        });
+      }
+    } else {
+      this.highlightTokens$.value = [];
+      // clear language if not found
+      this.model.props.language$.value = null;
+    }
+  }
+
+  override connectedCallback() {
+    super.connectedCallback();
+
+    // set highlight options getter used by "exportToHtml"
+    this.disposables.add(
+      effect(() => {
+        this._updateHighlightTokens();
+      })
+    );
+    this.disposables.add(
+      effect(() => {
+        noop(this.highlightTokens$.value);
+        this._richTextElement?.inlineEditor?.render();
+      })
+    );
+
+    const selectionManager = this.host.selection;
+    const INDENT_SYMBOL = '  ';
+    const LINE_BREAK_SYMBOL = '\n';
+    const allIndexOf = (
+      text: string,
+      symbol: string,
+      start = 0,
+      end = text.length
+    ) => {
+      const indexArr: number[] = [];
+      let i = start;
+
+      while (i < end) {
+        const index = text.indexOf(symbol, i);
+        if (index === -1 || index > end) {
+          break;
+        }
+        indexArr.push(index);
+        i = index + 1;
+      }
+      return indexArr;
+    };
+
+    // TODO: move to service for better performance
+    this.bindHotKey({
+      Backspace: ctx => {
+        const event = ctx.get('defaultState').event;
+        const textSelection = selectionManager.find(TextSelection);
+        if (!textSelection) {
+          event.preventDefault();
+          return;
+        }
+
+        const from = textSelection.from;
+
+        if (from.index === 0 && from.length === 0) {
+          event.preventDefault();
+          selectionManager.setGroup('note', [
+            selectionManager.create(BlockSelection, { blockId: this.blockId }),
+          ]);
+          return true;
+        }
+
+        const inlineEditor = this.inlineEditor;
+        const inlineRange = inlineEditor?.getInlineRange();
+        if (!inlineRange || !inlineEditor) return;
+        const left = inlineEditor.yText.toString()[inlineRange.index - 1];
+        const right = inlineEditor.yText.toString()[inlineRange.index];
+        const leftBrackets = BRACKET_PAIRS.map(pair => pair.left);
+        if (BRACKET_PAIRS[leftBrackets.indexOf(left)]?.right === right) {
+          const index = inlineRange.index - 1;
+          inlineEditor.deleteText({
+            index: index,
+            length: 2,
+          });
+          inlineEditor.setInlineRange({
+            index: index,
+            length: 0,
+          });
+          event.preventDefault();
+          return true;
+        }
+
+        return;
+      },
+      Tab: ctx => {
+        if (this.doc.readonly) return;
+        const state = ctx.get('keyboardState');
+        const event = state.raw;
+        const inlineEditor = this.inlineEditor;
+        if (!inlineEditor) return;
+        const inlineRange = inlineEditor.getInlineRange();
+        if (inlineRange) {
+          event.stopPropagation();
+          event.preventDefault();
+
+          const text = this.inlineEditor.yText.toString();
+          const index = text.lastIndexOf(
+            LINE_BREAK_SYMBOL,
+            inlineRange.index - 1
+          );
+          const indexArr = allIndexOf(
+            text,
+            LINE_BREAK_SYMBOL,
+            inlineRange.index,
+            inlineRange.index + inlineRange.length
+          )
+            .map(i => i + 1)
+            .reverse();
+          if (index !== -1) {
+            indexArr.push(index + 1);
+          } else {
+            indexArr.push(0);
+          }
+          indexArr.forEach(i => {
+            if (!this.inlineEditor) return;
+            this.inlineEditor.insertText(
+              {
+                index: i,
+                length: 0,
+              },
+              INDENT_SYMBOL
+            );
+          });
+          this.inlineEditor.setInlineRange({
+            index: inlineRange.index + 2,
+            length:
+              inlineRange.length + (indexArr.length - 1) * INDENT_SYMBOL.length,
+          });
+
+          return true;
+        }
+
+        return;
+      },
+      'Shift-Tab': ctx => {
+        const state = ctx.get('keyboardState');
+        const event = state.raw;
+        const inlineEditor = this.inlineEditor;
+        if (!inlineEditor) return;
+        const inlineRange = inlineEditor.getInlineRange();
+        if (inlineRange) {
+          event.stopPropagation();
+          event.preventDefault();
+
+          const text = this.inlineEditor.yText.toString();
+          const index = text.lastIndexOf(
+            LINE_BREAK_SYMBOL,
+            inlineRange.index - 1
+          );
+          let indexArr = allIndexOf(
+            text,
+            LINE_BREAK_SYMBOL,
+            inlineRange.index,
+            inlineRange.index + inlineRange.length
+          )
+            .map(i => i + 1)
+            .reverse();
+          if (index !== -1) {
+            indexArr.push(index + 1);
+          } else {
+            indexArr.push(0);
+          }
+          indexArr = indexArr.filter(
+            i => text.slice(i, i + 2) === INDENT_SYMBOL
+          );
+          indexArr.forEach(i => {
+            if (!this.inlineEditor) return;
+            this.inlineEditor.deleteText({
+              index: i,
+              length: 2,
+            });
+          });
+          if (indexArr.length > 0) {
+            this.inlineEditor.setInlineRange({
+              index:
+                inlineRange.index -
+                (indexArr[indexArr.length - 1] < inlineRange.index ? 2 : 0),
+              length:
+                inlineRange.length -
+                (indexArr.length - 1) * INDENT_SYMBOL.length,
+            });
+          }
+
+          return true;
+        }
+
+        return;
+      },
+      'Control-d': () => {
+        if (!IS_MAC) return;
+        return true;
+      },
+      Delete: () => {
+        return true;
+      },
+      Enter: () => {
+        this.doc.captureSync();
+        return true;
+      },
+      'Mod-Enter': () => {
+        const { model, std } = this;
+        if (!model || !std) return;
+        const inlineEditor = this.inlineEditor;
+        const inlineRange = inlineEditor?.getInlineRange();
+        if (!inlineRange || !inlineEditor) return;
+        const isEnd = model.props.text.length === inlineRange.index;
+        if (!isEnd) return;
+        const parent = this.doc.getParent(model);
+        if (!parent) return;
+        const index = parent.children.indexOf(model);
+        if (index === -1) return;
+        const id = this.doc.addBlock('affine:paragraph', {}, parent, index + 1);
+        focusTextModel(std, id);
+        return true;
+      },
+    });
+
+    this._inlineRangeProvider = getInlineRangeProvider(this);
+  }
+
+  copyCode() {
+    const model = this.model;
+    const slice = Slice.fromModels(model.doc, [model]);
+    this.std.clipboard
+      .copySlice(slice)
+      .then(() => {
+        this.notificationService?.toast('Copied to clipboard');
+      })
+      .catch(e => {
+        this.notificationService?.toast('Copied failed, something went wrong');
+        console.error(e);
+      });
+  }
+
+  override async getUpdateComplete() {
+    const result = await super.getUpdateComplete();
+    await this._richTextElement?.updateComplete;
+    return result;
+  }
+
+  override renderBlock(): TemplateResult<1> {
+    const showLineNumbers =
+      this.std.getOptional(CodeBlockConfigExtension.identifier)
+        ?.showLineNumbers ?? true;
+
+    return html`
+      <div
+        class=${classMap({
+          'affine-code-block-container': true,
+          mobile: IS_MOBILE,
+          wrap: this.model.props.wrap,
+        })}
+      >
+        <rich-text
+          .yText=${this.model.props.text.yText}
+          .inlineEventSource=${this.topContenteditableElement ?? nothing}
+          .undoManager=${this.doc.history}
+          .attributesSchema=${this.inlineManager.getSchema()}
+          .attributeRenderer=${this.inlineManager.getRenderer()}
+          .readonly=${this.doc.readonly}
+          .inlineRangeProvider=${this._inlineRangeProvider}
+          .enableClipboard=${false}
+          .enableUndoRedo=${false}
+          .wrapText=${this.model.props.wrap}
+          .verticalScrollContainerGetter=${() => getViewportElement(this.host)}
+          .vLineRenderer=${showLineNumbers
+            ? (vLine: VLine) => {
+                return html`
+                  <span contenteditable="false" class="line-number"
+                    >${vLine.index + 1}</span
+                  >
+                  ${vLine.renderVElements()}
+                `;
+              }
+            : undefined}
+        >
+        </rich-text>
+
+        ${this.renderChildren(this.model)} ${Object.values(this.widgets)}
+      </div>
+    `;
+  }
+
+  setWrap(wrap: boolean) {
+    this.doc.updateBlock(this.model, { wrap });
+  }
+
+  @query('rich-text')
+  private accessor _richTextElement: RichText | null = null;
+
+  override accessor blockContainerStyles = {
+    margin: '18px 0',
+  };
+
+  override accessor useCaptionEditor = true;
+
+  override accessor useZeroWidth = true;
+}
+
+declare global {
+  interface HTMLElementTagNameMap {
+    'affine-code': CodeBlockComponent;
+  }
+}

blocksuite/affine/blocks/code/src/code-keymap.ts

@@ -0,0 +1,7 @@
+import { textKeymap } from '@blocksuite/affine-inline-preset';
+import { CodeBlockSchema } from '@blocksuite/affine-model';
+import { KeymapExtension } from '@blocksuite/std';
+
+export const CodeKeymapExtension = KeymapExtension(textKeymap, {
+  flavour: CodeBlockSchema.model.flavour,
+});

blocksuite/affine/blocks/code/src/code-toolbar/components/code-toolbar.ts

@@ -0,0 +1,159 @@
+import { createLitPortal } from '@blocksuite/affine-components/portal';
+import type {
+  EditorIconButton,
+  MenuItemGroup,
+} from '@blocksuite/affine-components/toolbar';
+import { renderGroups } from '@blocksuite/affine-components/toolbar';
+import { WithDisposable } from '@blocksuite/global/lit';
+import { noop } from '@blocksuite/global/utils';
+import { MoreVerticalIcon } from '@blocksuite/icons/lit';
+import { flip, offset } from '@floating-ui/dom';
+import { css, html, LitElement } from 'lit';
+import { property, query, state } from 'lit/decorators.js';
+import { styleMap } from 'lit/directives/style-map.js';
+
+import type { CodeBlockToolbarContext } from '../context.js';
+
+export class AffineCodeToolbar extends WithDisposable(LitElement) {
+  static override styles = css`
+    :host {
+      position: absolute;
+      width: 100%;
+      top: 0;
+      left: 0;
+    }
+
+    .code-toolbar-container {
+      width: auto;
+      height: 24px;
+      gap: 4px;
+      padding: 4px;
+      margin: 0;
+      display: flex;
+      justify-content: flex-end;
+    }
+
+    .code-toolbar-button {
+      color: var(--affine-icon-color);
+      background-color: var(--affine-background-primary-color);
+      box-shadow: var(--affine-shadow-1);
+      border-radius: 4px;
+    }
+  `;
+
+  private _currentOpenMenu: AbortController | null = null;
+
+  private _popMenuAbortController: AbortController | null = null;
+
+  closeCurrentMenu = () => {
+    if (this._currentOpenMenu && !this._currentOpenMenu.signal.aborted) {
+      this._currentOpenMenu.abort();
+      this._currentOpenMenu = null;
+    }
+  };
+
+  private _toggleMoreMenu() {
+    if (
+      this._currentOpenMenu &&
+      !this._currentOpenMenu.signal.aborted &&
+      this._currentOpenMenu === this._popMenuAbortController
+    ) {
+      this.closeCurrentMenu();
+      this._moreMenuOpen = false;
+      return;
+    }
+
+    this.closeCurrentMenu();
+    this._popMenuAbortController = new AbortController();
+    this._popMenuAbortController.signal.addEventListener('abort', () => {
+      this._moreMenuOpen = false;
+      this.onActiveStatusChange(false);
+    });
+    this.onActiveStatusChange(true);
+
+    this._currentOpenMenu = this._popMenuAbortController;
+
+    if (!this._moreButton) {
+      console.error(
+        'Failed to open more menu in code toolbar! Unexpected missing more button'
+      );
+      return;
+    }
+
+    createLitPortal({
+      template: html`
+        <editor-menu-content
+          data-show
+          class="more-popup-menu"
+          style=${styleMap({
+            '--content-padding': '8px',
+            '--packed-height': '4px',
+          })}
+        >
+          <div data-size="large" data-orientation="vertical">
+            ${renderGroups(this.moreGroups, this.context)}
+          </div>
+        </editor-menu-content>
+      `,
+      // should be greater than block-selection z-index as selection and popover wil share the same stacking context(editor-host)
+      portalStyles: {
+        zIndex: 'var(--affine-z-index-popover)',
+      },
+      container: this.context.host,
+      computePosition: {
+        referenceElement: this._moreButton,
+        placement: 'bottom-start',
+        middleware: [flip(), offset(4)],
+        autoUpdate: { animationFrame: true },
+      },
+      abortController: this._popMenuAbortController,
+      closeOnClickAway: true,
+    });
+    this._moreMenuOpen = true;
+  }
+
+  override disconnectedCallback() {
+    super.disconnectedCallback();
+    this.closeCurrentMenu();
+  }
+
+  override render() {
+    return html`
+      <editor-toolbar class="code-toolbar-container" data-without-bg>
+        ${renderGroups(this.primaryGroups, this.context)}
+        <editor-icon-button
+          class="code-toolbar-button more"
+          data-testid="more"
+          aria-label="More"
+          .tooltip=${'More'}
+          .tooltipOffset=${4}
+          .iconSize=${'16px'}
+          .iconContainerPadding=${4}
+          .showTooltip=${!this._moreMenuOpen}
+          ?disabled=${this.context.doc.readonly}
+          @click=${() => this._toggleMoreMenu()}
+        >
+          ${MoreVerticalIcon()}
+        </editor-icon-button>
+      </editor-toolbar>
+    `;
+  }
+
+  @query('.code-toolbar-button.more')
+  private accessor _moreButton!: EditorIconButton;
+
+  @state()
+  private accessor _moreMenuOpen = false;
+
+  @property({ attribute: false })
+  accessor context!: CodeBlockToolbarContext;
+
+  @property({ attribute: false })
+  accessor moreGroups!: MenuItemGroup<CodeBlockToolbarContext>[];
+
+  @property({ attribute: false })
+  accessor onActiveStatusChange: (active: boolean) => void = noop;
+
+  @property({ attribute: false })
+  accessor primaryGroups!: MenuItemGroup<CodeBlockToolbarContext>[];
+}

blocksuite/affine/blocks/code/src/code-toolbar/components/lang-button.ts

@@ -0,0 +1,157 @@
+import {
+  type FilterableListItem,
+  type FilterableListOptions,
+  showPopFilterableList,
+} from '@blocksuite/affine-components/filterable-list';
+import { ArrowDownIcon } from '@blocksuite/affine-components/icons';
+import { unsafeCSSVarV2 } from '@blocksuite/affine-shared/theme';
+import { SignalWatcher, WithDisposable } from '@blocksuite/global/lit';
+import { noop } from '@blocksuite/global/utils';
+import { css, LitElement, nothing } from 'lit';
+import { property, query } from 'lit/decorators.js';
+import { styleMap } from 'lit/directives/style-map.js';
+import { html } from 'lit/static-html.js';
+
+import type { CodeBlockComponent } from '../..';
+
+export class LanguageListButton extends WithDisposable(
+  SignalWatcher(LitElement)
+) {
+  static override styles = css`
+    :host {
+      margin-right: auto;
+    }
+
+    .lang-button {
+      background-color: var(--affine-background-primary-color);
+      box-shadow: var(--affine-shadow-1);
+      display: flex;
+      gap: 4px;
+      padding: 2px 4px;
+    }
+
+    .lang-button:hover {
+      background: var(--affine-hover-color-filled);
+    }
+
+    .lang-button[hover] {
+      background: var(--affine-hover-color-filled);
+    }
+
+    .lang-button-icon {
+      display: flex;
+      align-items: center;
+      color: ${unsafeCSSVarV2('icon/primary')};
+
+      svg {
+        height: 16px;
+        width: 16px;
+      }
+    }
+  `;
+
+  private _abortController?: AbortController;
+
+  private readonly _clickLangBtn = () => {
+    if (this.blockComponent.doc.readonly) return;
+    if (this._abortController) {
+      // Close the language list if it's already opened.
+      this._abortController.abort();
+      return;
+    }
+    this._abortController = new AbortController();
+    this._abortController.signal.addEventListener('abort', () => {
+      this.onActiveStatusChange(false);
+      this._abortController = undefined;
+    });
+    this.onActiveStatusChange(true);
+
+    const options: FilterableListOptions = {
+      placeholder: 'Search for a language',
+      onSelect: item => {
+        const sortedBundledLanguages = this._sortedBundledLanguages;
+        const index = sortedBundledLanguages.indexOf(item);
+        if (index !== -1) {
+          sortedBundledLanguages.splice(index, 1);
+          sortedBundledLanguages.unshift(item);
+        }
+        this.blockComponent.doc.transact(() => {
+          this.blockComponent.model.props.language$.value = item.name;
+        });
+      },
+      active: item => item.name === this.blockComponent.model.props.language,
+      items: this._sortedBundledLanguages,
+    };
+
+    showPopFilterableList({
+      options,
+      referenceElement: this._langButton,
+      container: this.blockComponent.host,
+      abortController: this._abortController,
+      // stacking-context(editor-host)
+      portalStyles: {
+        zIndex: 'var(--affine-z-index-popover)',
+      },
+    });
+  };
+
+  private _sortedBundledLanguages: FilterableListItem[] = [];
+
+  override connectedCallback(): void {
+    super.connectedCallback();
+
+    const langList = localStorage.getItem('blocksuite:code-block:lang-list');
+    if (langList) {
+      this._sortedBundledLanguages = JSON.parse(langList);
+    } else {
+      this._sortedBundledLanguages = this.blockComponent.langs.map(lang => ({
+        label: lang.name,
+        name: lang.id,
+        aliases: lang.aliases,
+      }));
+    }
+
+    this.disposables.add(() => {
+      localStorage.setItem(
+        'blocksuite:code-block:lang-list',
+        JSON.stringify(this._sortedBundledLanguages)
+      );
+    });
+  }
+
+  override render() {
+    const textStyles = styleMap({
+      fontFamily: 'Inter',
+      fontSize: 'var(--affine-font-xs)',
+      fontStyle: 'normal',
+      fontWeight: '500',
+      lineHeight: '20px',
+      padding: '0 4px',
+    });
+
+    return html`<icon-button
+      class="lang-button"
+      data-testid="lang-button"
+      width="auto"
+      .text=${html`<div style=${textStyles}>
+        ${this.blockComponent.languageName$.value}
+      </div>`}
+      height="24px"
+      @click=${this._clickLangBtn}
+      ?disabled=${this.blockComponent.doc.readonly}
+    >
+      <span class="lang-button-icon" slot="suffix">
+        ${!this.blockComponent.doc.readonly ? ArrowDownIcon : nothing}
+      </span>
+    </icon-button> `;
+  }
+
+  @query('.lang-button')
+  private accessor _langButton!: HTMLElement;
+
+  @property({ attribute: false })
+  accessor blockComponent!: CodeBlockComponent;
+
+  @property({ attribute: false })
+  accessor onActiveStatusChange: (active: boolean) => void = noop;
+}

blocksuite/affine/blocks/code/src/code-toolbar/config.ts

@@ -0,0 +1,178 @@
+import {
+  CancelWrapIcon,
+  CaptionIcon,
+  CopyIcon,
+  DeleteIcon,
+  DuplicateIcon,
+  WrapIcon,
+} from '@blocksuite/affine-components/icons';
+import type { MenuItemGroup } from '@blocksuite/affine-components/toolbar';
+import { isInsidePageEditor } from '@blocksuite/affine-shared/utils';
+import { noop, sleep } from '@blocksuite/global/utils';
+import { BlockSelection } from '@blocksuite/std';
+import { html } from 'lit';
+import { ifDefined } from 'lit/directives/if-defined.js';
+
+import type { CodeBlockToolbarContext } from './context.js';
+import { duplicateCodeBlock } from './utils.js';
+
+export const PRIMARY_GROUPS: MenuItemGroup<CodeBlockToolbarContext>[] = [
+  {
+    type: 'primary',
+    items: [
+      {
+        type: 'change-lang',
+        generate: ({ blockComponent, setActive }) => {
+          const state = { active: false };
+          return {
+            action: noop,
+            render: () =>
+              html`<language-list-button
+                .blockComponent=${blockComponent}
+                .onActiveStatusChange=${async (active: boolean) => {
+                  state.active = active;
+                  if (!active) {
+                    await sleep(1000);
+                    if (state.active) return;
+                  }
+                  setActive(active);
+                }}
+              >
+              </language-list-button>`,
+          };
+        },
+      },
+      {
+        type: 'copy-code',
+        label: 'Copy code',
+        icon: CopyIcon,
+        generate: ({ blockComponent }) => {
+          return {
+            action: () => {
+              blockComponent.copyCode();
+            },
+            render: item => html`
+              <editor-icon-button
+                class="code-toolbar-button copy-code"
+                aria-label=${ifDefined(item.label)}
+                .tooltip=${item.label}
+                .tooltipOffset=${4}
+                .iconSize=${'16px'}
+                .iconContainerPadding=${4}
+                @click=${(e: MouseEvent) => {
+                  e.stopPropagation();
+                  item.action();
+                }}
+              >
+                ${item.icon}
+              </editor-icon-button>
+            `,
+          };
+        },
+      },
+      {
+        type: 'caption',
+        label: 'Caption',
+        icon: CaptionIcon,
+        when: ({ doc }) => !doc.readonly,
+        generate: ({ blockComponent }) => {
+          return {
+            action: () => {
+              blockComponent.captionEditor?.show();
+            },
+            render: item => html`
+              <editor-icon-button
+                class="code-toolbar-button caption"
+                aria-label=${ifDefined(item.label)}
+                .tooltip=${item.label}
+                .tooltipOffset=${4}
+                .iconSize=${'16px'}
+                .iconContainerPadding=${4}
+                @click=${(e: MouseEvent) => {
+                  e.stopPropagation();
+                  item.action();
+                }}
+              >
+                ${item.icon}
+              </editor-icon-button>
+            `,
+          };
+        },
+      },
+    ],
+  },
+];
+
+// Clipboard Group
+export const clipboardGroup: MenuItemGroup<CodeBlockToolbarContext> = {
+  type: 'clipboard',
+  items: [
+    {
+      type: 'wrap',
+      generate: ({ blockComponent, close }) => {
+        const wrapped = blockComponent.model.props.wrap;
+        const label = wrapped ? 'Cancel wrap' : 'Wrap';
+        const icon = wrapped ? CancelWrapIcon : WrapIcon;
+
+        return {
+          label,
+          icon,
+          action: () => {
+            blockComponent.setWrap(!wrapped);
+            close();
+          },
+        };
+      },
+    },
+    {
+      type: 'duplicate',
+      label: 'Duplicate',
+      icon: DuplicateIcon,
+      when: ({ doc }) => !doc.readonly,
+      action: ({ host, blockComponent, close }) => {
+        const codeId = duplicateCodeBlock(blockComponent.model);
+
+        host.updateComplete
+          .then(() => {
+            host.selection.setGroup('note', [
+              host.selection.create(BlockSelection, {
+                blockId: codeId,
+              }),
+            ]);
+
+            if (isInsidePageEditor(host)) {
+              const duplicateElement = host.view.getBlock(codeId);
+              if (duplicateElement) {
+                duplicateElement.scrollIntoView({ block: 'nearest' });
+              }
+            }
+          })
+          .catch(console.error);
+
+        close();
+      },
+    },
+  ],
+};
+
+// Delete Group
+export const deleteGroup: MenuItemGroup<CodeBlockToolbarContext> = {
+  type: 'delete',
+  items: [
+    {
+      type: 'delete',
+      label: 'Delete',
+      icon: DeleteIcon,
+      when: ({ doc }) => !doc.readonly,
+      action: ({ doc, blockComponent, close }) => {
+        doc.deleteBlock(blockComponent.model);
+        close();
+      },
+    },
+  ],
+};
+
+export const MORE_GROUPS: MenuItemGroup<CodeBlockToolbarContext>[] = [
+  clipboardGroup,
+  deleteGroup,
+];

blocksuite/affine/blocks/code/src/code-toolbar/context.ts

@@ -0,0 +1,46 @@
+import { MenuContext } from '@blocksuite/affine-components/toolbar';
+
+import type { CodeBlockComponent } from '../code-block';
+
+export class CodeBlockToolbarContext extends MenuContext {
+  override close = () => {
+    this.abortController.abort();
+  };
+
+  get doc() {
+    return this.blockComponent.doc;
+  }
+
+  get host() {
+    return this.blockComponent.host;
+  }
+
+  get selectedBlockModels() {
+    if (this.blockComponent.model) return [this.blockComponent.model];
+    return [];
+  }
+
+  get std() {
+    return this.blockComponent.std;
+  }
+
+  constructor(
+    public blockComponent: CodeBlockComponent,
+    public abortController: AbortController,
+    public setActive: (active: boolean) => void
+  ) {
+    super();
+  }
+
+  isEmpty() {
+    return false;
+  }
+
+  isMultiple() {
+    return false;
+  }
+
+  isSingle() {
+    return true;
+  }
+}

blocksuite/affine/blocks/code/src/code-toolbar/index.ts

@@ -0,0 +1,173 @@
+import { HoverController } from '@blocksuite/affine-components/hover';
+import type {
+  AdvancedMenuItem,
+  MenuItemGroup,
+} from '@blocksuite/affine-components/toolbar';
+import {
+  cloneGroups,
+  getMoreMenuConfig,
+} from '@blocksuite/affine-components/toolbar';
+import type { CodeBlockModel } from '@blocksuite/affine-model';
+import {
+  BlockSelection,
+  TextSelection,
+  WidgetComponent,
+} from '@blocksuite/std';
+import { limitShift, shift, size } from '@floating-ui/dom';
+import { html } from 'lit';
+
+import type { CodeBlockComponent } from '../code-block.js';
+import { MORE_GROUPS, PRIMARY_GROUPS } from './config.js';
+import { CodeBlockToolbarContext } from './context.js';
+
+export const AFFINE_CODE_TOOLBAR_WIDGET = 'affine-code-toolbar-widget';
+export class AffineCodeToolbarWidget extends WidgetComponent<
+  CodeBlockModel,
+  CodeBlockComponent
+> {
+  private _hoverController: HoverController | null = null;
+
+  private _isActivated = false;
+
+  private readonly _setHoverController = () => {
+    this._hoverController = null;
+    this._hoverController = new HoverController(
+      this,
+      ({ abortController }) => {
+        const codeBlock = this.block;
+        if (!codeBlock) {
+          return null;
+        }
+
+        const selection = this.host.selection;
+
+        const textSelection = selection.find(TextSelection);
+        if (
+          !!textSelection &&
+          (!!textSelection.to || !!textSelection.from.length)
+        ) {
+          return null;
+        }
+
+        const blockSelections = selection.filter(BlockSelection);
+        if (
+          blockSelections.length > 1 ||
+          (blockSelections.length === 1 &&
+            blockSelections[0].blockId !== codeBlock.blockId)
+        ) {
+          return null;
+        }
+
+        const setActive = (active: boolean) => {
+          this._isActivated = active;
+          if (!active && !this._hoverController?.isHovering) {
+            this._hoverController?.abort();
+          }
+        };
+
+        const context = new CodeBlockToolbarContext(
+          codeBlock,
+          abortController,
+          setActive
+        );
+
+        return {
+          template: html`<affine-code-toolbar
+            .context=${context}
+            .primaryGroups=${this.primaryGroups}
+            .moreGroups=${this.moreGroups}
+            .onActiveStatusChange=${setActive}
+          ></affine-code-toolbar>`,
+          container: this.block,
+          // stacking-context(editor-host)
+          portalStyles: {
+            zIndex: 'var(--affine-z-index-popover)',
+          },
+          computePosition: {
+            referenceElement: codeBlock,
+            placement: 'top',
+            middleware: [
+              size({
+                apply({ rects, elements }) {
+                  elements.floating.style.width = `${rects.reference.width}px`;
+                },
+              }),
+              shift({
+                crossAxis: true,
+                padding: {
+                  bottom: 12,
+                  right: 12,
+                },
+                limiter: limitShift(),
+              }),
+            ],
+            autoUpdate: true,
+          },
+        };
+      },
+      { allowMultiple: true }
+    );
+
+    const codeBlock = this.block;
+    if (!codeBlock) {
+      return;
+    }
+    this._hoverController.setReference(codeBlock);
+    this._hoverController.onAbort = () => {
+      // If the more menu is opened, don't close it.
+      if (this._isActivated) return;
+      this._hoverController?.abort();
+      return;
+    };
+  };
+
+  addMoretems = (
+    items: AdvancedMenuItem<CodeBlockToolbarContext>[],
+    index?: number,
+    type?: string
+  ) => {
+    let group;
+    if (type) {
+      group = this.moreGroups.find(g => g.type === type);
+    }
+    if (!group) {
+      group = this.moreGroups[0];
+    }
+
+    if (index === undefined) {
+      group.items.push(...items);
+      return this;
+    }
+
+    group.items.splice(index, 0, ...items);
+    return this;
+  };
+
+  addPrimaryItems = (
+    items: AdvancedMenuItem<CodeBlockToolbarContext>[],
+    index?: number
+  ) => {
+    if (index === undefined) {
+      this.primaryGroups[0].items.push(...items);
+      return this;
+    }
+
+    this.primaryGroups[0].items.splice(index, 0, ...items);
+    return this;
+  };
+
+  /*
+   * Caches the more menu items.
+   * Currently only supports configuring more menu.
+   */
+  protected moreGroups: MenuItemGroup<CodeBlockToolbarContext>[] =
+    cloneGroups(MORE_GROUPS);
+
+  protected primaryGroups: MenuItemGroup<CodeBlockToolbarContext>[] =
+    cloneGroups(PRIMARY_GROUPS);
+
+  override firstUpdated() {
+    this.moreGroups = getMoreMenuConfig(this.std).configure(this.moreGroups);
+    this._setHoverController();
+  }
+}

blocksuite/affine/blocks/code/src/code-toolbar/utils.ts

@@ -0,0 +1,16 @@
+import type { CodeBlockModel } from '@blocksuite/affine-model';
+
+export const duplicateCodeBlock = (model: CodeBlockModel) => {
+  const keys = model.keys as (keyof (typeof model)['props'])[];
+  const values = keys.map(key => model.props[key]);
+  const blockProps = Object.fromEntries(keys.map((key, i) => [key, values[i]]));
+  const { text: _text, ...duplicateProps } = blockProps;
+
+  const newProps = {
+    flavour: model.flavour,
+    text: model.props.text.clone(),
+    ...duplicateProps,
+  };
+
+  return model.doc.addSiblingBlocks(model, [newProps])[0];
+};

blocksuite/affine/blocks/code/src/configs/slash-menu.ts

@@ -0,0 +1,8 @@
+import { type SlashMenuConfig } from '@blocksuite/affine-widget-slash-menu';
+
+export const codeSlashMenuConfig: SlashMenuConfig = {
+  disableWhen: ({ model }) => {
+    return model.flavour === 'affine:code';
+  },
+  items: [],
+};

blocksuite/affine/blocks/code/src/effects.ts

@@ -0,0 +1,24 @@
+import { CodeBlockComponent } from './code-block';
+import {
+  AFFINE_CODE_TOOLBAR_WIDGET,
+  AffineCodeToolbarWidget,
+} from './code-toolbar';
+import { AffineCodeToolbar } from './code-toolbar/components/code-toolbar';
+import { LanguageListButton } from './code-toolbar/components/lang-button';
+import { AffineCodeUnit } from './highlight/affine-code-unit';
+
+export function effects() {
+  customElements.define('language-list-button', LanguageListButton);
+  customElements.define('affine-code-toolbar', AffineCodeToolbar);
+  customElements.define(AFFINE_CODE_TOOLBAR_WIDGET, AffineCodeToolbarWidget);
+  customElements.define('affine-code-unit', AffineCodeUnit);
+  customElements.define('affine-code', CodeBlockComponent);
+}
+
+declare global {
+  interface HTMLElementTagNameMap {
+    'language-list-button': LanguageListButton;
+    'affine-code-toolbar': AffineCodeToolbar;
+    [AFFINE_CODE_TOOLBAR_WIDGET]: AffineCodeToolbarWidget;
+  }
+}

blocksuite/affine/blocks/code/src/highlight/affine-code-unit.ts

@@ -0,0 +1,122 @@
+import { affineTextStyles } from '@blocksuite/affine-shared/styles';
+import type { AffineTextAttributes } from '@blocksuite/affine-shared/types';
+import { ShadowlessElement } from '@blocksuite/std';
+import { ZERO_WIDTH_SPACE } from '@blocksuite/std/inline';
+import type { DeltaInsert } from '@blocksuite/store';
+import { html } from 'lit';
+import { property } from 'lit/decorators.js';
+import { styleMap } from 'lit/directives/style-map.js';
+import type { ThemedToken } from 'shiki';
+
+export class AffineCodeUnit extends ShadowlessElement {
+  get codeBlock() {
+    return this.closest('affine-code');
+  }
+
+  get vElement() {
+    return this.closest('v-element');
+  }
+
+  override render() {
+    if (this.delta.attributes?.link && this.codeBlock) {
+      return html`<affine-link
+        .std=${this.codeBlock.std}
+        .delta=${this.delta}
+      ></affine-link>`;
+    }
+
+    let style = this.delta.attributes
+      ? affineTextStyles(this.delta.attributes)
+      : {};
+    if (this.delta.attributes?.code) {
+      style = {
+        ...style,
+        'font-size': 'calc(var(--affine-font-base) - 3px)',
+        padding: '0px 4px 2px',
+      };
+    }
+
+    const plainContent = html`<span style=${styleMap(style)}
+      ><v-text .str=${this.delta.insert}></v-text
+    ></span>`;
+
+    const codeBlock = this.codeBlock;
+    const vElement = this.vElement;
+    if (!codeBlock || !vElement) return plainContent;
+    const tokens = codeBlock.highlightTokens$.value;
+    if (tokens.length === 0) return plainContent;
+    // copy the tokens to avoid modifying the original tokens
+    const lineTokens = structuredClone(tokens[vElement.lineIndex]);
+    if (lineTokens.length === 0) return plainContent;
+
+    const startOffset = vElement.startOffset;
+    const endOffset = vElement.endOffset;
+    const includedTokens: ThemedToken[] = [];
+    lineTokens.forEach(token => {
+      if (
+        (token.offset <= startOffset &&
+          token.offset + token.content.length >= startOffset) ||
+        (token.offset >= startOffset &&
+          token.offset + token.content.length <= endOffset) ||
+        (token.offset <= endOffset &&
+          token.offset + token.content.length >= endOffset)
+      ) {
+        includedTokens.push(token);
+      }
+    });
+    if (includedTokens.length === 0) return plainContent;
+
+    if (includedTokens.length === 1) {
+      const token = includedTokens[0];
+      const content = token.content.slice(
+        startOffset - token.offset,
+        endOffset - token.offset
+      );
+
+      return html`<span
+        style=${styleMap({
+          color: token.color,
+          ...style,
+        })}
+        ><v-text .str=${content}></v-text
+      ></span>`;
+    } else {
+      const firstToken = includedTokens[0];
+      const lastToken = includedTokens[includedTokens.length - 1];
+
+      const firstContent = firstToken.content.slice(
+        startOffset - firstToken.offset,
+        firstToken.content.length
+      );
+      const lastContent = lastToken.content.slice(
+        0,
+        endOffset - lastToken.offset
+      );
+      firstToken.content = firstContent;
+      lastToken.content = lastContent;
+
+      const vTexts = includedTokens.map(token => {
+        return html`<v-text
+          .str=${token.content}
+          style=${styleMap({
+            color: token.color,
+            ...style,
+          })}
+        ></v-text>`;
+      });
+
+      return html`<span>${vTexts}</span>`;
+    }
+  }
+
+  @property({ type: Object })
+  accessor delta: DeltaInsert<AffineTextAttributes> = {
+    insert: ZERO_WIDTH_SPACE,
+  };
+}
+
+declare global {
+  interface HTMLElementTagNameMap {
+    'affine-code-unit': AffineCodeUnit;
+  }
+}

blocksuite/affine/blocks/code/src/highlight/const.ts

@@ -0,0 +1,6 @@
+export const CODE_BLOCK_DEFAULT_DARK_THEME = import(
+  'shiki/themes/dark-plus.mjs'
+);
+export const CODE_BLOCK_DEFAULT_LIGHT_THEME = import(
+  'shiki/themes/light-plus.mjs'
+);

blocksuite/affine/blocks/code/src/index.ts

@@ -0,0 +1,5 @@
+export * from './adapters';
+export * from './code-block';
+export * from './code-block-config';
+export * from './code-block-spec';
+export * from './code-toolbar';

blocksuite/affine/blocks/code/src/styles.ts

@@ -0,0 +1,52 @@
+import { scrollbarStyle } from '@blocksuite/affine-shared/styles';
+import { css } from 'lit';
+
+export const codeBlockStyles = css`
+  .affine-code-block-container {
+    font-size: var(--affine-font-xs);
+    line-height: var(--affine-line-height);
+    position: relative;
+    padding: 28px 24px;
+    background: var(--affine-background-code-block);
+    border-radius: 10px;
+    box-sizing: border-box;
+  }
+
+  .affine-code-block-container.mobile {
+    padding: 12px;
+  }
+
+  ${scrollbarStyle('.affine-code-block-container rich-text')}
+
+  .affine-code-block-container .inline-editor {
+    font-family: var(--affine-font-code-family);
+    font-variant-ligatures: none;
+  }
+
+  .affine-code-block-container v-line {
+    position: relative;
+    display: inline-grid !important;
+    grid-template-columns: auto minmax(0, 1fr);
+  }
+
+  .affine-code-block-container div:has(> v-line) {
+    display: grid;
+  }
+
+  .affine-code-block-container .line-number {
+    position: sticky;
+    text-align: left;
+    padding-right: 4px;
+    width: 24px;
+    word-break: break-word;
+    white-space: nowrap;
+    left: -0.5px;
+    z-index: 1;
+    background: var(--affine-background-code-block);
+    font-size: var(--affine-font-xs);
+    line-height: var(--affine-line-height);
+    color: var(--affine-text-secondary);
+    box-sizing: border-box;
+    user-select: none;
+  }
+`;