Test: folding range provider event to signal that ranges have changed

[aeschli]

Refs: #99914

• anyOS @bpasero

Complexity: 3

Create Issue

---

Write a extension that test the new proposed API onDidChangeFoldingRanges

	export interface FoldingRangeProvider {

		/**
		 * An optional event to signal that the folding ranges from this provider have changed.
		 */
		onDidChangeFoldingRanges?: Event<void>;

		/**
		 * Returns a list of folding ranges or null and undefined if the provider
		 * does not want to participate or was cancelled.
		 * @param document The document in which the command was invoked.
		 * @param context Additional context information (for future use)
		 * @param token A cancellation token.
		 */
		provideFoldingRanges(document: TextDocument, context: FoldingContext, token: CancellationToken): ProviderResult<FoldingRange[]>;
	}

[bpasero]

Verified using the following very simple extension code:

class MyProvider implements vscode.FoldingRangeProvider {

	_onDidChangeFoldingRangeEmitter = new vscode.EventEmitter<void>();
	onDidChangeFoldingRanges = this._onDidChangeFoldingRangeEmitter.event;

	constructor() {
		setInterval(() => {
			this._onDidChangeFoldingRangeEmitter.fire();
		}, 1000);
	}

	provideFoldingRanges(document: vscode.TextDocument, context: vscode.FoldingContext, token: vscode.CancellationToken): vscode.ProviderResult<vscode.FoldingRange[]> {
		console.log("provide ranges");

		return [];
	}
}