modularize tool-call rendering and styles

packages/ui/src/components/tool-call/renderers/read.tsx

@@ -0,0 +1,25 @@
+import type { ToolRenderer } from "../types"
+import { ensureMarkdownContent, getRelativePath, getToolName, inferLanguageFromPath, readToolStatePayload } from "../utils"
+
+export const readRenderer: ToolRenderer = {
+  tools: ["read"],
+  getAction: () => "Reading file...",
+  getTitle({ toolState }) {
+    const state = toolState()
+    if (!state) return undefined
+    const { input } = readToolStatePayload(state)
+    const filePath = typeof input.filePath === "string" ? input.filePath : ""
+    if (!filePath) return getToolName("read")
+    return `${getToolName("read")} ${getRelativePath(filePath)}`
+  },
+  renderBody({ toolState, renderMarkdown }) {
+    const state = toolState()
+    if (!state || state.status === "pending") return null
+    const { metadata, input } = readToolStatePayload(state)
+    const preview = typeof metadata.preview === "string" ? metadata.preview : null
+    const language = inferLanguageFromPath(typeof input.filePath === "string" ? input.filePath : undefined)
+    const content = ensureMarkdownContent(preview, language, true)
+    if (!content) return null
+    return renderMarkdown({ content, disableHighlight: state.status === "running" })
+  },
+}