CodeLensProvider (VS Code API)

A code lens provider adds commands to source text.

2つのメソッド

独自のCodeLensProviderは2つとも実装する必要がある

provideCodeLenses(document: TextDocument, token: CancellationToken): ProviderResult<T[]>

Compute a list of lenses.

This call should return as fast as possible and if computing the commands is expensive implementors should only return code lens objects with the range set and implement resolve.

「可能な限り速く返すべき」

「コマンドの計算が高コストならば、実装者は範囲（range）の集合と一緒にCodeLensオブジェクト（複数）だけを返し、resolveを実装すべき」

resolveCodeLens(codeLens: T, token: CancellationToken): ProviderResult<T>

This function will be called for each visible code lens, usually when scrolling and after calls to compute-lenses.

「スクロールするときやCodeLensの計算の呼び出しのあとに」