public static CommandTargetToOleShim ConnectController(IVsEditorAdaptersFactoryService adapterService, ITextView textView, Controller controller) {
IVsTextView viewAdapter = adapterService.GetViewAdapter(textView);
CommandTargetToOleShim oleControllerShim = null;
// Connect main controller to VS text view filter chain.
// The chain looks like VS IDE -> language main controller -> Core editor
// However, IDE wants IOleCommandTarget and core editor, although managed,
// is represented by OLE command target as well. Since R controller
// is not specific to VS and does not use OLE, we create OLE-to-managed target shim
// and managed target-to-OLE shims.
if (viewAdapter != null) {
// Create OLE shim that wraps main controller ICommandTarget and represents
// it as IOleCommandTarget that is accepted by VS IDE.
oleControllerShim = new CommandTargetToOleShim(textView, controller);
IOleCommandTarget nextOleTarget;
viewAdapter.AddCommandFilter(oleControllerShim, out nextOleTarget);
// nextOleTarget is typically a core editor wrapped into OLE layer.
// Create a wrapper that will present OLE target as ICommandTarget to
// HTML main controller so controller can operate in platform-agnostic way.
ICommandTarget nextCommandTarget = VsAppShell.Current.TranslateCommandTarget(textView, nextOleTarget);
controller.ChainedController = nextCommandTarget;
}
return oleControllerShim;
}
protected override void OnTextViewDisconnected(ITextView textView, ITextBuffer textBuffer) {
if (textBuffer == textView.TextDataModel.DocumentBuffer && _oleController != null) {
OleControllerChain.DisconnectController(_adapterService, textView, _oleController);
_oleController = null;
}
base.OnTextViewDisconnected(textView, textBuffer);
}
protected override void OnTextViewGotAggregateFocus(ITextView textView, ITextBuffer textBuffer) {
// Only attach controllers if the document is editable
if (textView.Roles.Contains(PredefinedTextViewRoles.Editable)) {
// Check if another buffer already attached a command controller to the view.
// Don't allow two to be attached, or commands could be run twice.
// This currently can only happen with inline diff views.
MdMainController mainController = MdMainController.FromTextView(textView);
if (textBuffer == mainController.TextBuffer) {
// Connect main controller to VS text view filter chain. The chain looks like
// VS IDE -> HTML main controller -> Core editor
// However, IDE wants IOleCommandTarget and core editor, although managed,
// is represented by OLE command target as well. Since HTML controller
// is not specific to VS and does not use OLE, we create OLE-to-managed target shim
// and managed target-to-OLE shims.
IVsEditorAdaptersFactoryService adapterService = VsAppShell.Current.ExportProvider.GetExport<IVsEditorAdaptersFactoryService>().Value;
IVsTextView viewAdapter = adapterService.GetViewAdapter(textView);
if (viewAdapter != null) {
// Create OLE shim that wraps main controller ICommandTarget and represents
// it as IOleCommandTarget that is accepted by VS IDE.
CommandTargetToOleShim oleController = new CommandTargetToOleShim(textView, mainController);
IOleCommandTarget nextOleTarget;
viewAdapter.AddCommandFilter(oleController, out nextOleTarget);
// nextOleTarget is typically a core editor wrapped into OLE layer.
// Create a wrapper that will present OLE target as ICommandTarget to
// HTML main controller so controller can operate in platform-agnostic way.
ICommandTarget nextCommandTarget = VsAppShell.Current.TranslateCommandTarget(textView, nextOleTarget);
mainController.ChainedController = nextCommandTarget;
}
}
}
base.OnTextViewGotAggregateFocus(textView, textBuffer);
}
public static void DisconnectController(IVsEditorAdaptersFactoryService adapterService, ITextView textView, CommandTargetToOleShim oleControllerShim) {
IVsTextView viewAdapter = adapterService.GetViewAdapter(textView);
if (viewAdapter != null) {
viewAdapter.RemoveCommandFilter(oleControllerShim);
}
}