Get write_to_file streaming working

src/integrations/editor/DiffViewProvider.ts

@@ -0,0 +1,51 @@
+import * as vscode from "vscode"
+import * as diff from "diff"
+
+export class DiffViewProvider implements vscode.TextDocumentContentProvider {
+	private _onDidChange = new vscode.EventEmitter<vscode.Uri>()
+	onDidChange = this._onDidChange.event
+
+	private originalContent: string = ""
+	private newContent: string = ""
+	private fileName: string = ""
+
+	constructor() {
+		// Register the provider
+		vscode.workspace.registerTextDocumentContentProvider("claude-dev-diff", this)
+	}
+
+	initialize(fileName: string, originalContent: string) {
+		this.fileName = fileName
+		this.originalContent = originalContent
+		this.newContent = originalContent
+	}
+
+	updateNewContent(updatedContent: string) {
+		this.newContent = updatedContent
+		this._onDidChange.fire(this.getDiffUri())
+	}
+
+	provideTextDocumentContent(uri: vscode.Uri): string {
+		return this.createDiffContent()
+	}
+
+	private createDiffContent(): string {
+		const diffResult = diff.createPatch(this.fileName, this.originalContent, this.newContent)
+		return diffResult
+	}
+
+	getDiffUri(): vscode.Uri {
+		return vscode.Uri.parse(`claude-dev-diff:${this.fileName}`).with({
+			query: Buffer.from(this.originalContent).toString("base64"),
+		})
+	}
+
+	async showDiff() {
+		await vscode.commands.executeCommand(
+			"vscode.diff",
+			this.getDiffUri(),
+			vscode.Uri.file(this.fileName),
+			`${this.fileName}: Original ↔ Claude's Changes (Editable)`
+		)
+	}
+}