C# Lazy.Where方法代码示例

		public WpfTextViewConnectionListenerService(IWpfTextView wpfTextView, Lazy<IWpfTextViewConnectionListener, IContentTypeAndTextViewRoleMetadata>[] wpfTextViewConnectionListeners) {
			if (wpfTextView == null)
				throw new ArgumentNullException(nameof(wpfTextView));
			if (wpfTextViewConnectionListeners == null)
				throw new ArgumentNullException(nameof(wpfTextViewConnectionListeners));
			this.wpfTextView = wpfTextView;
			listenerInfos = wpfTextViewConnectionListeners.Where(a => wpfTextView.Roles.ContainsAny(a.Metadata.TextViewRoles)).Select(a => new ListenerInfo(a)).ToArray();
			wpfTextView.Closed += WpfTextView_Closed;
			wpfTextView.TextDataModel.ContentTypeChanged += TextDataModel_ContentTypeChanged;
			InitializeListeners();
		}

		public WpfHexViewMarginProviderCollectionImpl(Lazy<WpfHexViewMarginProvider, IWpfHexViewMarginMetadata>[] wpfHexViewMarginProviders, WpfHexViewHost wpfHexViewHost, WpfHexViewMargin marginContainer, string marginContainerName) {
			if (wpfHexViewMarginProviders == null)
				throw new ArgumentNullException(nameof(wpfHexViewMarginProviders));
			if (wpfHexViewHost == null)
				throw new ArgumentNullException(nameof(wpfHexViewHost));
			if (marginContainer == null)
				throw new ArgumentNullException(nameof(marginContainer));
			if (marginContainerName == null)
				throw new ArgumentNullException(nameof(marginContainerName));
			this.wpfHexViewMarginProviders = wpfHexViewMarginProviders.Where(a =>
				StringComparer.OrdinalIgnoreCase.Equals(marginContainerName, a.Metadata.MarginContainer) &&
				wpfHexViewHost.HexView.Roles.ContainsAny(a.Metadata.TextViewRoles)
			).ToArray();
			this.wpfHexViewHost = wpfHexViewHost;
			this.marginContainer = marginContainer;
			currentMargins = Array.Empty<WpfHexViewMarginInfo>();
			wpfHexViewHost.Closed += WpfHexViewHost_Closed;
			UpdateMargins();
		}

#pragma warning restore 0169

		public WpfHexViewImpl(HexBuffer buffer, VSTE.ITextViewRoleSet roles, VSTE.IEditorOptions parentOptions, HexEditorOptionsFactoryService hexEditorOptionsFactoryService, ICommandService commandService, FormattedHexSourceFactoryService formattedHexSourceFactoryService, HexViewClassifierAggregatorService hexViewClassifierAggregatorService, HexAndAdornmentSequencerFactoryService hexAndAdornmentSequencerFactoryService, HexBufferLineFormatterFactoryService bufferLineProviderFactoryService, HexClassificationFormatMapService classificationFormatMapService, HexEditorFormatMapService editorFormatMapService, HexAdornmentLayerDefinitionService adornmentLayerDefinitionService, HexLineTransformProviderService lineTransformProviderService, HexSpaceReservationStackProvider spaceReservationStackProvider, Lazy<WpfHexViewCreationListener, IDeferrableTextViewRoleMetadata>[] wpfHexViewCreationListeners, VSTC.IClassificationTypeRegistryService classificationTypeRegistryService, Lazy<HexCursorProviderFactory, ITextViewRoleMetadata>[] hexCursorProviderFactories) {
			if (buffer == null)
				throw new ArgumentNullException(nameof(buffer));
			if (roles == null)
				throw new ArgumentNullException(nameof(roles));
			if (parentOptions == null)
				throw new ArgumentNullException(nameof(parentOptions));
			if (hexEditorOptionsFactoryService == null)
				throw new ArgumentNullException(nameof(hexEditorOptionsFactoryService));
			if (commandService == null)
				throw new ArgumentNullException(nameof(commandService));
			if (formattedHexSourceFactoryService == null)
				throw new ArgumentNullException(nameof(formattedHexSourceFactoryService));
			if (hexViewClassifierAggregatorService == null)
				throw new ArgumentNullException(nameof(hexViewClassifierAggregatorService));
			if (hexAndAdornmentSequencerFactoryService == null)
				throw new ArgumentNullException(nameof(hexAndAdornmentSequencerFactoryService));
			if (bufferLineProviderFactoryService == null)
				throw new ArgumentNullException(nameof(bufferLineProviderFactoryService));
			if (classificationFormatMapService == null)
				throw new ArgumentNullException(nameof(classificationFormatMapService));
			if (editorFormatMapService == null)
				throw new ArgumentNullException(nameof(editorFormatMapService));
			if (adornmentLayerDefinitionService == null)
				throw new ArgumentNullException(nameof(adornmentLayerDefinitionService));
			if (lineTransformProviderService == null)
				throw new ArgumentNullException(nameof(lineTransformProviderService));
			if (spaceReservationStackProvider == null)
				throw new ArgumentNullException(nameof(spaceReservationStackProvider));
			if (wpfHexViewCreationListeners == null)
				throw new ArgumentNullException(nameof(wpfHexViewCreationListeners));
			if (classificationTypeRegistryService == null)
				throw new ArgumentNullException(nameof(classificationTypeRegistryService));
			if (hexCursorProviderFactories == null)
				throw new ArgumentNullException(nameof(hexCursorProviderFactories));
			canvas = new HexViewCanvas(this);
			Buffer = buffer;
			thisHexLineTransformSource = new MyHexLineTransformSource(this);
			this.bufferLineProviderFactoryService = bufferLineProviderFactoryService;
			mouseHoverHelper = new MouseHoverHelper(this);
			physicalLineCache = new PhysicalLineCache(32);
			visiblePhysicalLines = new List<PhysicalLine>();
			invalidatedRegions = new List<HexBufferSpan>();
			this.formattedHexSourceFactoryService = formattedHexSourceFactoryService;
			zoomLevel = VSTE.ZoomConstants.DefaultZoom;
			DsImage.SetZoom(VisualElement, zoomLevel / 100);
			this.adornmentLayerDefinitionService = adornmentLayerDefinitionService;
			this.lineTransformProviderService = lineTransformProviderService;
			this.wpfHexViewCreationListeners = wpfHexViewCreationListeners.Where(a => roles.ContainsAny(a.Metadata.TextViewRoles)).ToArray();
			recreateLineTransformProvider = true;
			normalAdornmentLayerCollection = new HexAdornmentLayerCollection(this, HexLayerKind.Normal);
			overlayAdornmentLayerCollection = new HexAdornmentLayerCollection(this, HexLayerKind.Overlay);
			underlayAdornmentLayerCollection = new HexAdornmentLayerCollection(this, HexLayerKind.Underlay);
			canvas.IsVisibleChanged += WpfHexView_IsVisibleChanged;
			Roles = roles;
			Options = hexEditorOptionsFactoryService.GetOptions(this);
			Options.Parent = parentOptions;
			ViewScroller = new HexViewScrollerImpl(this);
			hasKeyboardFocus = canvas.IsKeyboardFocusWithin;
			oldViewState = new HexViewState(this);
			aggregateClassifier = hexViewClassifierAggregatorService.GetClassifier(this);
			hexAndAdornmentSequencer = hexAndAdornmentSequencerFactoryService.Create(this);
			classificationFormatMap = classificationFormatMapService.GetClassificationFormatMap(this);
			editorFormatMap = editorFormatMapService.GetEditorFormatMap(this);
			spaceReservationStack = spaceReservationStackProvider.Create(this);

			textLayer = new TextLayer(GetAdornmentLayer(PredefinedHexAdornmentLayers.Text));
			HexSelection = new HexSelectionImpl(this, GetAdornmentLayer(PredefinedHexAdornmentLayers.Selection), editorFormatMap);
			HexCaret = new HexCaretImpl(this, GetAdornmentLayer(PredefinedHexAdornmentLayers.Caret), classificationFormatMap, classificationTypeRegistryService);

			canvas.Children.Add(underlayAdornmentLayerCollection);
			canvas.Children.Add(normalAdornmentLayerCollection);
			canvas.Children.Add(overlayAdornmentLayerCollection);
			canvas.Focusable = true;
			canvas.FocusVisualStyle = null;
			InitializeOptions();

			Options.OptionChanged += EditorOptions_OptionChanged;
			Buffer.ChangedLowPriority += HexBuffer_ChangedLowPriority;
			Buffer.BufferSpanInvalidated += Buffer_BufferSpanInvalidated;
			aggregateClassifier.ClassificationChanged += AggregateClassifier_ClassificationChanged;
			hexAndAdornmentSequencer.SequenceChanged += HexAndAdornmentSequencer_SequenceChanged;
			classificationFormatMap.ClassificationFormatMappingChanged += ClassificationFormatMap_ClassificationFormatMappingChanged;
			editorFormatMap.FormatMappingChanged += EditorFormatMap_FormatMappingChanged;
			spaceReservationStack.GotAggregateFocus += SpaceReservationStack_GotAggregateFocus;
			spaceReservationStack.LostAggregateFocus += SpaceReservationStack_LostAggregateFocus;

			UpdateBackground();
			CreateFormattedLineSource(ViewportWidth);
			var dummy = BufferLines;
			HexSelection.Initialize();
			HexCaret.Initialize();
			InitializeZoom();
			UpdateRemoveExtraTextLineVerticalPixels();

			if (Roles.Contains(PredefinedHexViewRoles.Interactive))
				RegisteredCommandElement = commandService.Register(VisualElement, this);
			else
//.........这里部分代码省略.........

#pragma warning restore 0169

		public WpfTextView(ITextViewModel textViewModel, ITextViewRoleSet roles, IEditorOptions parentOptions, IEditorOptionsFactoryService editorOptionsFactoryService, ICommandService commandService, ISmartIndentationService smartIndentationService, IFormattedTextSourceFactoryService formattedTextSourceFactoryService, IViewClassifierAggregatorService viewClassifierAggregatorService, ITextAndAdornmentSequencerFactoryService textAndAdornmentSequencerFactoryService, IClassificationFormatMapService classificationFormatMapService, IEditorFormatMapService editorFormatMapService, IAdornmentLayerDefinitionService adornmentLayerDefinitionService, ILineTransformProviderService lineTransformProviderService, ISpaceReservationStackProvider spaceReservationStackProvider, IWpfTextViewConnectionListenerServiceProvider wpfTextViewConnectionListenerServiceProvider, IBufferGraphFactoryService bufferGraphFactoryService, Lazy<IWpfTextViewCreationListener, IDeferrableContentTypeAndTextViewRoleMetadata>[] wpfTextViewCreationListeners) {
			if (textViewModel == null)
				throw new ArgumentNullException(nameof(textViewModel));
			if (roles == null)
				throw new ArgumentNullException(nameof(roles));
			if (parentOptions == null)
				throw new ArgumentNullException(nameof(parentOptions));
			if (editorOptionsFactoryService == null)
				throw new ArgumentNullException(nameof(editorOptionsFactoryService));
			if (commandService == null)
				throw new ArgumentNullException(nameof(commandService));
			if (smartIndentationService == null)
				throw new ArgumentNullException(nameof(smartIndentationService));
			if (formattedTextSourceFactoryService == null)
				throw new ArgumentNullException(nameof(formattedTextSourceFactoryService));
			if (viewClassifierAggregatorService == null)
				throw new ArgumentNullException(nameof(viewClassifierAggregatorService));
			if (textAndAdornmentSequencerFactoryService == null)
				throw new ArgumentNullException(nameof(textAndAdornmentSequencerFactoryService));
			if (classificationFormatMapService == null)
				throw new ArgumentNullException(nameof(classificationFormatMapService));
			if (editorFormatMapService == null)
				throw new ArgumentNullException(nameof(editorFormatMapService));
			if (adornmentLayerDefinitionService == null)
				throw new ArgumentNullException(nameof(adornmentLayerDefinitionService));
			if (lineTransformProviderService == null)
				throw new ArgumentNullException(nameof(lineTransformProviderService));
			if (spaceReservationStackProvider == null)
				throw new ArgumentNullException(nameof(spaceReservationStackProvider));
			if (wpfTextViewCreationListeners == null)
				throw new ArgumentNullException(nameof(wpfTextViewCreationListeners));
			if (wpfTextViewConnectionListenerServiceProvider == null)
				throw new ArgumentNullException(nameof(wpfTextViewConnectionListenerServiceProvider));
			if (bufferGraphFactoryService == null)
				throw new ArgumentNullException(nameof(bufferGraphFactoryService));
			mouseHoverHelper = new MouseHoverHelper(this);
			physicalLineCache = new PhysicalLineCache(32);
			visiblePhysicalLines = new List<PhysicalLine>();
			invalidatedRegions = new List<SnapshotSpan>();
			this.formattedTextSourceFactoryService = formattedTextSourceFactoryService;
			zoomLevel = ZoomConstants.DefaultZoom;
			DsImage.SetZoom(VisualElement, zoomLevel / 100);
			this.adornmentLayerDefinitionService = adornmentLayerDefinitionService;
			this.lineTransformProviderService = lineTransformProviderService;
			this.wpfTextViewCreationListeners = wpfTextViewCreationListeners.Where(a => roles.ContainsAny(a.Metadata.TextViewRoles)).ToArray();
			recreateLineTransformProvider = true;
			normalAdornmentLayerCollection = new AdornmentLayerCollection(this, LayerKind.Normal);
			overlayAdornmentLayerCollection = new AdornmentLayerCollection(this, LayerKind.Overlay);
			underlayAdornmentLayerCollection = new AdornmentLayerCollection(this, LayerKind.Underlay);
			IsVisibleChanged += WpfTextView_IsVisibleChanged;
			Properties = new PropertyCollection();
			TextViewModel = textViewModel;
			BufferGraph = bufferGraphFactoryService.CreateBufferGraph(TextViewModel.VisualBuffer);
			Roles = roles;
			Options = editorOptionsFactoryService.GetOptions(this);
			Options.Parent = parentOptions;
			ViewScroller = new ViewScroller(this);
			hasKeyboardFocus = IsKeyboardFocusWithin;
			oldViewState = new ViewState(this);
			aggregateClassifier = viewClassifierAggregatorService.GetClassifier(this);
			textAndAdornmentSequencer = textAndAdornmentSequencerFactoryService.Create(this);
			classificationFormatMap = classificationFormatMapService.GetClassificationFormatMap(this);
			editorFormatMap = editorFormatMapService.GetEditorFormatMap(this);
			spaceReservationStack = spaceReservationStackProvider.Create(this);

			textLayer = new TextLayer(GetAdornmentLayer(PredefinedAdornmentLayers.Text));
			Selection = new TextSelection(this, GetAdornmentLayer(PredefinedAdornmentLayers.Selection), editorFormatMap);
			TextCaret = new TextCaret(this, GetAdornmentLayer(PredefinedAdornmentLayers.Caret), smartIndentationService, classificationFormatMap);

			Children.Add(underlayAdornmentLayerCollection);
			Children.Add(normalAdornmentLayerCollection);
			Children.Add(overlayAdornmentLayerCollection);
			Cursor = Cursors.IBeam;
			Focusable = true;
			FocusVisualStyle = null;
			InitializeOptions();

			Options.OptionChanged += EditorOptions_OptionChanged;
			TextBuffer.ChangedLowPriority += TextBuffer_ChangedLowPriority;
			TextViewModel.DataModel.ContentTypeChanged += DataModel_ContentTypeChanged;
			aggregateClassifier.ClassificationChanged += AggregateClassifier_ClassificationChanged;
			textAndAdornmentSequencer.SequenceChanged += TextAndAdornmentSequencer_SequenceChanged;
			classificationFormatMap.ClassificationFormatMappingChanged += ClassificationFormatMap_ClassificationFormatMappingChanged;
			editorFormatMap.FormatMappingChanged += EditorFormatMap_FormatMappingChanged;
			spaceReservationStack.GotAggregateFocus += SpaceReservationStack_GotAggregateFocus;
			spaceReservationStack.LostAggregateFocus += SpaceReservationStack_LostAggregateFocus;

			UpdateBackground();
			CreateFormattedLineSource(ViewportWidth);
			InitializeZoom();
			UpdateRemoveExtraTextLineVerticalPixels();

			if (Roles.Contains(PredefinedTextViewRoles.Interactive))
				RegisteredCommandElement = commandService.Register(VisualElement, this);
			else
				RegisteredCommandElement = NullRegisteredCommandElement.Instance;

			wpfTextViewConnectionListenerServiceProvider.Create(this);
//.........这里部分代码省略.........