✨ feat(vscode): 代码阅读入口、文件树与预览编辑器

vscode/src/codeReader/editor/documentMessage.ts

@@ -0,0 +1,39 @@
+import type { CodeReaderRegistry } from '../registry'
+import type { TreeSitterRuntime } from '../runtime'
+import type { DocumentMessage } from './messages'
+import { readBlockViews } from '../blockView'
+
+/** 生成预览数据要读的那点文档信息（TextDocument 的子集）。 */
+export interface DocumentSnapshot {
+  languageId: string
+  version: number
+  getText: () => string
+}
+
+/** 当前文档 → 发给预览的 document 消息；语言不支持或解析失败时带 error，blocks 为空。 */
+export async function documentMessage(
+  document: DocumentSnapshot,
+  registry: Pick<CodeReaderRegistry, 'languageFor' | 'translatorsFor' | 'selectedTranslator'>,
+  runtime: Pick<TreeSitterRuntime, 'parse'>,
+): Promise<DocumentMessage> {
+  const { languageId, version } = document
+  const source = document.getText()
+  const translator = registry.selectedTranslator(languageId)
+  const message: DocumentMessage = {
+    type: 'document',
+    version,
+    languageId,
+    blocks: [],
+    translators: registry.translatorsFor(languageId).map(({ id, label }) => ({ id, label })),
+    translatorId: translator?.id ?? '',
+  }
+  const adapter = registry.languageFor(languageId)
+  if (!adapter)
+    return { ...message, error: `代码阅读还不支持「${languageId}」这种语言` }
+  try {
+    return { ...message, blocks: await readBlockViews(runtime, adapter, translator, languageId, source) }
+  }
+  catch (err) {
+    return { ...message, error: err instanceof Error ? err.message : String(err) }
+  }
+}