/// <summary>
/// Determines if the Roslyn extensions for Visual Studio are installed.
/// </summary>
/// <remarks>
/// This method caches the result after it is first checked with the IDE.
/// </remarks>
/// <param name="serviceProvider">A service provider for accessing global IDE services.</param>
/// <returns>
/// <see langword="true"/> if the Roslyn extensions are installed.
/// <para>-or-</para>
/// <para><see langword="false"/> if the Roslyn extensions are not installed.</para>
/// <para>-or-</para>
/// <para>null if the result of this method has not been cached from a previous call, and <paramref name="serviceProvider"/> is <see langword="null"/> or could not be used to obtain an instance of <see cref="IVsShell"/>.</para>
/// </returns>
public static bool?IsRoslynInstalled(IServiceProvider serviceProvider)
{
if (roslynInstalled.HasValue)
{
return(roslynInstalled);
}
if (IsFinalRoslyn)
{
roslynInstalled = true;
return(true);
}
if (serviceProvider == null)
{
return(null);
}
IVsShell vsShell = serviceProvider.GetService(typeof(SVsShell)) as IVsShell;
if (vsShell == null)
{
return(null);
}
Guid guid = new Guid("6cf2e545-6109-4730-8883-cf43d7aec3e1");
int isInstalled;
if (ErrorHandler.Succeeded(vsShell.IsPackageInstalled(ref guid, out isInstalled)))
{
roslynInstalled = isInstalled != 0;
}
return(roslynInstalled);
}
public static T LoadPackage <T>([NotNull] this IVsShell shell)
where T : Package
{
Requires.NotNull(shell, nameof(shell));
Guid guid = typeof(T).GUID;
IVsPackage package;
ErrorHandler.ThrowOnFailure(shell.LoadPackage(ref guid, out package));
return((T)package);
}
public static T LoadPackage <T>(this IVsShell shell)
where T : Package
{
Contract.Requires <ArgumentNullException>(shell != null, "shell");
Guid guid = typeof(T).GUID;
IVsPackage package;
ErrorHandler.ThrowOnFailure(shell.LoadPackage(ref guid, out package));
return((T)package);
}
private static string GetLocalRegRoot(IServiceProvider serviceProvider)
{
IVsShell vsShell = TemplateUtilities.GetService <IVsShell, IVsShell>(serviceProvider);
Object obj;
vsShell.GetProperty((int)__VSSPROPID.VSSPROPID_VirtualRegistryRoot, out obj);
if (obj != null && obj is string)
{
return((string)obj);
}
return(null);
}
public IGlyphFactory GetGlyphFactory(IWpfTextView view, IWpfTextViewMargin margin)
{
if (view == null || margin == null)
{
return(null);
}
if (!_packageLoaded)
{
IVsShell shell = (IVsShell)ServiceProvider.GetService(typeof(SVsShell));
Guid guid = typeof(InheritanceMarginPackage).GUID;
IVsPackage package;
ErrorHandler.ThrowOnFailure(shell.LoadPackage(ref guid, out package));
_packageLoaded = true;
}
return(new InheritanceGlyphFactory(this, view, margin));
}
