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// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
// See the LICENSE file in the project root for more information.
#nullable disable
using System;
using System.Collections.Immutable;
using System.ComponentModel.Composition;
using System.Runtime.InteropServices;
using System.Threading;
using System.Threading.Tasks;
using Microsoft.CodeAnalysis.Editor.Shared.Utilities;
using Microsoft.CodeAnalysis.ErrorReporting;
using Microsoft.CodeAnalysis.Extensions;
using Microsoft.CodeAnalysis.Host.Mef;
using Microsoft.CodeAnalysis.Options;
using Microsoft.CodeAnalysis.Shared.TestHooks;
using Microsoft.VisualStudio.LanguageServices.Implementation;
using Microsoft.VisualStudio.LanguageServices.Implementation.Utilities;
using Microsoft.VisualStudio.LanguageServices.Utilities;
using Microsoft.VisualStudio.OLE.Interop;
using Microsoft.VisualStudio.PlatformUI.OleComponentSupport;
using Microsoft.VisualStudio.Shell;
using Microsoft.VisualStudio.Shell.Interop;
using Roslyn.Utilities;
using Task = System.Threading.Tasks.Task;
namespace Microsoft.VisualStudio.LanguageServices.KeybindingReset
{
/// <summary>
/// Detects if keybindings have been messed up by ReSharper disable, and offers the user the ability
/// to reset if so.
/// </summary>
/// <remarks>
/// The only objects to hold permanent references to this object should be callbacks that are registered for in
/// <see cref="InitializeCore"/>. No other external objects should hold a reference to this. Unless the user clicks
/// 'Never show this again', this will persist for the life of the VS instance, and does not need to be manually disposed
/// in that case.
/// </remarks>
/// <para>
/// We've written this in a generic mechanism we can extend to any extension as we know of them,
/// but at this time ReSharper is the only one we know of that has this behavior.
/// If we find other extensions that do this in the future, we'll re-use this same mechanism
/// </para>
[Export(typeof(KeybindingResetDetector))]
internal sealed class KeybindingResetDetector : ForegroundThreadAffinitizedObject, IOleCommandTarget
{
private const string KeybindingsFwLink = "https://go.microsoft.com/fwlink/?linkid=864209";
private const string ReSharperExtensionName = "ReSharper Ultimate";
private const string ReSharperKeyboardMappingName = "ReSharper (Visual Studio)";
private const string VSCodeKeyboardMappingName = "Visual Studio Code";
// Resharper commands and package
private const uint ResumeId = 707;
private const uint SuspendId = 708;
private const uint ToggleSuspendId = 709;
private static readonly Guid s_resharperPackageGuid = new("0C6E6407-13FC-4878-869A-C8B4016C57FE");
private static readonly Guid s_resharperCommandGroup = new("47F03277-5055-4922-899C-0F7F30D26BF1");
private static readonly ImmutableArray<OptionKey2> s_statusOptions = ImmutableArray.Create<OptionKey2>(
new OptionKey2(KeybindingResetOptionsStorage.ReSharperStatus),
new OptionKey2(KeybindingResetOptionsStorage.NeedsReset));
private readonly IGlobalOptionService _globalOptions;
private readonly System.IServiceProvider _serviceProvider;
private readonly VisualStudioInfoBar _infoBar;
// All mutable fields are UI-thread affinitized
private IVsUIShell _uiShell;
private IOleCommandTarget _oleCommandTarget;
private OleComponent _oleComponent;
private uint _priorityCommandTargetCookie = VSConstants.VSCOOKIE_NIL;
private CancellationTokenSource _cancellationTokenSource = new();
/// <summary>
/// If false, ReSharper is either not installed, or has been disabled in the extension manager.
/// If true, the ReSharper extension is enabled. ReSharper's internal status could be either suspended or enabled.
/// </summary>
private bool _resharperExtensionInstalledAndEnabled = false;
private bool _infoBarOpen = false;
/// <summary>
/// Chain all update tasks so that task runs serially
/// </summary>
private Task _lastTask = Task.CompletedTask;
[ImportingConstructor]
[Obsolete(MefConstruction.ImportingConstructorMessage, error: true)]
public KeybindingResetDetector(
IThreadingContext threadingContext,
IGlobalOptionService globalOptions,
SVsServiceProvider serviceProvider,
IAsynchronousOperationListenerProvider listenerProvider)
: base(threadingContext)
{
_globalOptions = globalOptions;
_serviceProvider = serviceProvider;
_infoBar = new VisualStudioInfoBar(threadingContext, serviceProvider, listenerProvider);
}
public Task InitializeAsync()
{
// Immediately bail if the user has asked to never see this bar again.
if (_globalOptions.GetOption(KeybindingResetOptionsStorage.NeverShowAgain))
{
return Task.CompletedTask;
}
return InvokeBelowInputPriorityAsync(InitializeCore);
}
private void InitializeCore()
{
AssertIsForeground();
if (!_globalOptions.GetOption(KeybindingResetOptionsStorage.EnabledFeatureFlag))
{
return;
}
var vsShell = _serviceProvider.GetServiceOnMainThread<SVsShell, IVsShell>();
var hr = vsShell.IsPackageInstalled(s_resharperPackageGuid, out var extensionEnabled);
if (ErrorHandler.Failed(hr))
{
FatalError.ReportAndCatch(Marshal.GetExceptionForHR(hr));
return;
}
_resharperExtensionInstalledAndEnabled = extensionEnabled != 0;
if (_resharperExtensionInstalledAndEnabled)
{
// We need to monitor for suspend/resume commands, so create and install the command target and the modal callback.
var priorityCommandTargetRegistrar = _serviceProvider.GetServiceOnMainThread<SVsRegisterPriorityCommandTarget, IVsRegisterPriorityCommandTarget>();
hr = priorityCommandTargetRegistrar.RegisterPriorityCommandTarget(
dwReserved: 0 /* from docs must be 0 */,
pCmdTrgt: this,
pdwCookie: out _priorityCommandTargetCookie);
if (ErrorHandler.Failed(hr))
{
FatalError.ReportAndCatch(Marshal.GetExceptionForHR(hr));
return;
}
// Initialize the OleComponent to listen for modal changes (which will tell us when Tools->Options is closed)
_oleComponent = OleComponent.CreateHostedComponent("Keybinding Reset Detector");
_oleComponent.ModalStateChanged += OnModalStateChanged;
}
// run it from background and fire and forget
StartUpdateStateMachine();
}
private void StartUpdateStateMachine()
{
// cancel previous state machine update request
_cancellationTokenSource.Cancel();
_cancellationTokenSource = new CancellationTokenSource();
var cancellationToken = _cancellationTokenSource.Token;
// make sure all state machine change work is serialized so that cancellation
// doesn't mess the state up.
_lastTask = _lastTask.SafeContinueWithFromAsync(_ =>
{
return UpdateStateMachineWorkerAsync(cancellationToken);
}, cancellationToken, TaskScheduler.Default);
}
private async Task UpdateStateMachineWorkerAsync(CancellationToken cancellationToken)
{
var options = _globalOptions.GetOptions(s_statusOptions);
var lastStatus = (ReSharperStatus)options[0];
var needsReset = (bool)options[1];
ReSharperStatus currentStatus;
try
{
currentStatus = await IsReSharperRunningAsync(cancellationToken).ConfigureAwait(false);
}
catch (OperationCanceledException)
{
return;
}
if (currentStatus == lastStatus)
{
return;
}
switch (lastStatus)
{
case ReSharperStatus.NotInstalledOrDisabled:
case ReSharperStatus.Suspended:
if (currentStatus == ReSharperStatus.Enabled)
{
// N->E or S->E. If ReSharper was just installed and is enabled, reset NeedsReset.
needsReset = false;
}
// Else is N->N, N->S, S->N, S->S. N->S can occur if the user suspends ReSharper, then disables
// the extension, then reenables the extension. We will show the gold bar after the switch
// if there is still a pending show.
break;
case ReSharperStatus.Enabled:
if (currentStatus != ReSharperStatus.Enabled)
{
// E->N or E->S. Set NeedsReset. Pop the gold bar to the user.
needsReset = true;
}
// Else is E->E. No actions to take
break;
}
_globalOptions.SetGlobalOptions(ImmutableArray.Create(
KeyValuePairUtil.Create(new OptionKey2(KeybindingResetOptionsStorage.ReSharperStatus), (object)currentStatus),
KeyValuePairUtil.Create(new OptionKey2(KeybindingResetOptionsStorage.NeedsReset), (object)needsReset)));
if (needsReset)
{
ShowGoldBar();
}
}
private void ShowGoldBar()
{
// If the gold bar is already open, do not show
if (_infoBarOpen)
{
return;
}
_infoBarOpen = true;
var message = ServicesVSResources.We_notice_you_suspended_0_Reset_keymappings_to_continue_to_navigate_and_refactor;
KeybindingsResetLogger.Log("InfoBarShown");
_infoBar.ShowInfoBar(
string.Format(message, ReSharperExtensionName),
new InfoBarUI(title: ServicesVSResources.Reset_Visual_Studio_default_keymapping,
kind: InfoBarUI.UIKind.Button,
action: RestoreVsKeybindings),
new InfoBarUI(title: string.Format(ServicesVSResources.Apply_0_keymapping_scheme, ReSharperKeyboardMappingName),
kind: InfoBarUI.UIKind.Button,
action: OpenExtensionsHyperlink),
new InfoBarUI(title: string.Format(ServicesVSResources.Apply_0_keymapping_scheme, VSCodeKeyboardMappingName),
kind: InfoBarUI.UIKind.Button,
action: OpenExtensionsHyperlink),
new InfoBarUI(title: ServicesVSResources.Never_show_this_again,
kind: InfoBarUI.UIKind.HyperLink,
action: NeverShowAgain),
new InfoBarUI(title: "", kind: InfoBarUI.UIKind.Close,
action: InfoBarClose));
}
/// <summary>
/// Returns true if ReSharper is installed, enabled, and not suspended.
/// </summary>
private async ValueTask<ReSharperStatus> IsReSharperRunningAsync(CancellationToken cancellationToken)
{
// Quick exit if resharper is either uninstalled or not enabled
if (!_resharperExtensionInstalledAndEnabled)
{
return ReSharperStatus.NotInstalledOrDisabled;
}
await EnsureOleCommandTargetAsync().ConfigureAwait(false);
// poll until either suspend or resume botton is available, or until operation is canceled
while (true)
{
cancellationToken.ThrowIfCancellationRequested();
var suspendFlag = await QueryStatusAsync(SuspendId).ConfigureAwait(false);
// In the case of an error when attempting to get the status, pretend that ReSharper isn't enabled. We also
// shut down monitoring so we don't keep hitting this.
if (suspendFlag == 0)
{
return ReSharperStatus.NotInstalledOrDisabled;
}
var resumeFlag = await QueryStatusAsync(ResumeId).ConfigureAwait(false);
if (resumeFlag == 0)
{
return ReSharperStatus.NotInstalledOrDisabled;
}
// When ReSharper is running, the ReSharper_Suspend command is Enabled and not Invisible
if (suspendFlag.HasFlag(OLECMDF.OLECMDF_ENABLED) && !suspendFlag.HasFlag(OLECMDF.OLECMDF_INVISIBLE))
{
return ReSharperStatus.Enabled;
}
// When ReSharper is suspended, the ReSharper_Resume command is Enabled and not Invisible
if (resumeFlag.HasFlag(OLECMDF.OLECMDF_ENABLED) && !resumeFlag.HasFlag(OLECMDF.OLECMDF_INVISIBLE))
{
return ReSharperStatus.Suspended;
}
// ReSharper has not finished initializing, so try again later
await Task.Delay(TimeSpan.FromSeconds(2), cancellationToken).ConfigureAwait(false);
}
async Task<OLECMDF> QueryStatusAsync(uint cmdId)
{
var cmds = new OLECMD[1];
cmds[0].cmdID = cmdId;
cmds[0].cmdf = 0;
await ThreadingContext.JoinableTaskFactory.SwitchToMainThreadAsync(cancellationToken);
var hr = _oleCommandTarget.QueryStatus(s_resharperCommandGroup, (uint)cmds.Length, cmds, IntPtr.Zero);
if (ErrorHandler.Failed(hr))
{
FatalError.ReportAndCatch(Marshal.GetExceptionForHR(hr));
await ShutdownAsync().ConfigureAwait(false);
return 0;
}
return (OLECMDF)cmds[0].cmdf;
}
async Task EnsureOleCommandTargetAsync()
{
if (_oleCommandTarget != null)
{
return;
}
await ThreadingContext.JoinableTaskFactory.SwitchToMainThreadAsync(cancellationToken);
_oleCommandTarget = _serviceProvider.GetServiceOnMainThread<SUIHostCommandDispatcher, IOleCommandTarget>();
}
}
private void RestoreVsKeybindings()
{
AssertIsForeground();
_uiShell ??= _serviceProvider.GetServiceOnMainThread<SVsUIShell, IVsUIShell>();
ErrorHandler.ThrowOnFailure(_uiShell.PostExecCommand(
VSConstants.GUID_VSStandardCommandSet97,
(uint)VSConstants.VSStd97CmdID.CustomizeKeyboard,
(uint)OLECMDEXECOPT.OLECMDEXECOPT_DODEFAULT,
null));
KeybindingsResetLogger.Log("KeybindingsReset");
_globalOptions.SetGlobalOption(KeybindingResetOptionsStorage.NeedsReset, false);
}
private void OpenExtensionsHyperlink()
{
ThisCanBeCalledOnAnyThread();
VisualStudioNavigateToLinkService.StartBrowser(KeybindingsFwLink);
KeybindingsResetLogger.Log("ExtensionsLink");
_globalOptions.SetGlobalOption(KeybindingResetOptionsStorage.NeedsReset, false);
}
private void NeverShowAgain()
{
_globalOptions.SetGlobalOption(KeybindingResetOptionsStorage.NeverShowAgain, true);
_globalOptions.SetGlobalOption(KeybindingResetOptionsStorage.NeedsReset, false);
KeybindingsResetLogger.Log("NeverShowAgain");
// The only external references to this object are as callbacks, which are removed by the Shutdown method.
ThreadingContext.JoinableTaskFactory.Run(ShutdownAsync);
}
private void InfoBarClose()
{
AssertIsForeground();
_infoBarOpen = false;
}
public int QueryStatus(ref Guid pguidCmdGroup, uint cCmds, OLECMD[] prgCmds, IntPtr pCmdText)
{
// Technically can be called on any thread, though VS will only ever call it on the UI thread.
ThisCanBeCalledOnAnyThread();
// We don't care about query status, only when the command is actually executed
return (int)OLE.Interop.Constants.OLECMDERR_E_NOTSUPPORTED;
}
public int Exec(ref Guid pguidCmdGroup, uint nCmdID, uint nCmdexecopt, IntPtr pvaIn, IntPtr pvaOut)
{
// Technically can be called on any thread, though VS will only ever call it on the UI thread.
ThisCanBeCalledOnAnyThread();
if (pguidCmdGroup == s_resharperCommandGroup && nCmdID >= ResumeId && nCmdID <= ToggleSuspendId)
{
// Don't delay command processing to update resharper status
StartUpdateStateMachine();
}
// No matter the command, we never actually want to respond to it, so always return not supported. We're just monitoring.
return (int)OLE.Interop.Constants.OLECMDERR_E_NOTSUPPORTED;
}
private void OnModalStateChanged(object sender, StateChangedEventArgs args)
{
ThisCanBeCalledOnAnyThread();
// Only monitor for StateTransitionType.Exit. This will be fired when the shell is leaving a modal state, including
// Tools->Options being exited. This will fire more than just on Options close, but there's no harm from running an
// extra QueryStatus.
if (args.TransitionType == StateTransitionType.Exit)
{
StartUpdateStateMachine();
}
}
private async Task ShutdownAsync()
{
// we are shutting down, cancel any pending work.
_cancellationTokenSource.Cancel();
await ThreadingContext.JoinableTaskFactory.SwitchToMainThreadAsync();
if (_priorityCommandTargetCookie != VSConstants.VSCOOKIE_NIL)
{
var priorityCommandTargetRegistrar = _serviceProvider.GetServiceOnMainThread<SVsRegisterPriorityCommandTarget, IVsRegisterPriorityCommandTarget>();
var cookie = _priorityCommandTargetCookie;
_priorityCommandTargetCookie = VSConstants.VSCOOKIE_NIL;
var hr = priorityCommandTargetRegistrar.UnregisterPriorityCommandTarget(cookie);
if (ErrorHandler.Failed(hr))
{
FatalError.ReportAndCatch(Marshal.GetExceptionForHR(hr));
}
}
if (_oleComponent != null)
{
_oleComponent.Dispose();
_oleComponent = null;
}
}
}
}
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