Prevent ligatures between inlay hints and editor contents (Fix #170449)

[r3m0t]

Fixes #170449

Setting:

    "editor.fontLigatures": "'liga', 'calt', 'cv16'", // *
"editor.fontFamily": "'Fira Code'",

Extension:

vscode.languages.registerInlayHintsProvider({pattern: "**"}, {
		provideInlayHints(document, range, token) {
			const ret:vscode.InlayHint[] = [];
			for (let i = range.start.line; i <= range.end.line; i++) {
				const lineText = document.lineAt(i).text;
				for (const j of lineText.matchAll(/&/g)) {
					ret.push({label: "&", position: new vscode.Position(i, j.index!)});
				}
				for (const j of lineText.matchAll(/==/g)) {
					ret.push({label: "=", position: new vscode.Position(i, j.index!)});
				}
				if (token.isCancellationRequested) throw new vscode.CancellationError();
			}
			return ret;
		},
	});

Expected result:

vs VS Code:

See https://www.w3.org/TR/2023/CRD-css-text-3-20230213/#boundary-shaping

[hediet]

Thanks a lot!