Code:
/ 4.0 / 4.0 / untmp / DEVDIV_TFS / Dev10 / Releases / RTMRel / wpf / src / Core / CSharp / MS / Internal / Automation / EventMap.cs / 1606164 / EventMap.cs
//---------------------------------------------------------------------------- // //// Copyright (C) Microsoft Corporation. All rights reserved. // // // // Description: // Accessibility event map classes are used to determine if, and how many // listeners there are for events and property changes. // // History: // 07/23/2003 : BrendanM Ported to WCP // //--------------------------------------------------------------------------- using System; using System.Collections; using System.Windows; using System.Windows.Automation; using System.Windows.Automation.Peers; using SR=MS.Internal.PresentationCore.SR; using SRID=MS.Internal.PresentationCore.SRID; namespace MS.Internal.Automation { // Manages the event map that is used to determine if there are Automation // clients interested in specific events. internal static class EventMap { private class EventInfo { internal EventInfo() { NumberOfListeners = 1; } internal int NumberOfListeners; } // Never inline, as we don't want to unnecessarily link the automation DLL. [System.Runtime.CompilerServices.MethodImpl(System.Runtime.CompilerServices.MethodImplOptions.NoInlining)] private static bool IsKnownEvent(int id) { if ( id == AutomationElementIdentifiers.ToolTipOpenedEvent.Id || id == AutomationElementIdentifiers.ToolTipClosedEvent.Id || id == AutomationElementIdentifiers.MenuOpenedEvent.Id || id == AutomationElementIdentifiers.MenuClosedEvent.Id || id == AutomationElementIdentifiers.AutomationFocusChangedEvent.Id || id == InvokePatternIdentifiers.InvokedEvent.Id || id == SelectionItemPatternIdentifiers.ElementAddedToSelectionEvent.Id || id == SelectionItemPatternIdentifiers.ElementRemovedFromSelectionEvent.Id || id == SelectionItemPatternIdentifiers.ElementSelectedEvent.Id || id == SelectionPatternIdentifiers.InvalidatedEvent.Id || id == TextPatternIdentifiers.TextSelectionChangedEvent.Id || id == TextPatternIdentifiers.TextChangedEvent.Id || id == AutomationElementIdentifiers.AsyncContentLoadedEvent.Id || id == AutomationElementIdentifiers.AutomationPropertyChangedEvent.Id || id == AutomationElementIdentifiers.StructureChangedEvent.Id || ((SynchronizedInputPatternIdentifiers.InputReachedTargetEvent != null) && (id == SynchronizedInputPatternIdentifiers.InputReachedTargetEvent.Id)) || ((SynchronizedInputPatternIdentifiers.InputReachedOtherElementEvent != null) && (id == SynchronizedInputPatternIdentifiers.InputReachedOtherElementEvent.Id)) || ((SynchronizedInputPatternIdentifiers.InputDiscardedEvent != null) && (id == SynchronizedInputPatternIdentifiers.InputDiscardedEvent.Id))) { return true; } return false; } // Never inline, as we don't want to unnecessarily link the automation DLL. [System.Runtime.CompilerServices.MethodImpl(System.Runtime.CompilerServices.MethodImplOptions.NoInlining)] private static AutomationEvent GetRegisteredEventObjectHelper(AutomationEvents eventId) { AutomationEvent eventObject = null; switch(eventId) { case AutomationEvents.ToolTipOpened: eventObject = AutomationElementIdentifiers.ToolTipOpenedEvent; break; case AutomationEvents.ToolTipClosed: eventObject = AutomationElementIdentifiers.ToolTipClosedEvent; break; case AutomationEvents.MenuOpened: eventObject = AutomationElementIdentifiers.MenuOpenedEvent; break; case AutomationEvents.MenuClosed: eventObject = AutomationElementIdentifiers.MenuClosedEvent; break; case AutomationEvents.AutomationFocusChanged: eventObject = AutomationElementIdentifiers.AutomationFocusChangedEvent; break; case AutomationEvents.InvokePatternOnInvoked: eventObject = InvokePatternIdentifiers.InvokedEvent; break; case AutomationEvents.SelectionItemPatternOnElementAddedToSelection: eventObject = SelectionItemPatternIdentifiers.ElementAddedToSelectionEvent; break; case AutomationEvents.SelectionItemPatternOnElementRemovedFromSelection: eventObject = SelectionItemPatternIdentifiers.ElementRemovedFromSelectionEvent; break; case AutomationEvents.SelectionItemPatternOnElementSelected: eventObject = SelectionItemPatternIdentifiers.ElementSelectedEvent; break; case AutomationEvents.SelectionPatternOnInvalidated: eventObject = SelectionPatternIdentifiers.InvalidatedEvent; break; case AutomationEvents.TextPatternOnTextSelectionChanged: eventObject = TextPatternIdentifiers.TextSelectionChangedEvent; break; case AutomationEvents.TextPatternOnTextChanged: eventObject = TextPatternIdentifiers.TextChangedEvent; break; case AutomationEvents.AsyncContentLoaded: eventObject = AutomationElementIdentifiers.AsyncContentLoadedEvent; break; case AutomationEvents.PropertyChanged: eventObject = AutomationElementIdentifiers.AutomationPropertyChangedEvent; break; case AutomationEvents.StructureChanged: eventObject = AutomationElementIdentifiers.StructureChangedEvent; break; case AutomationEvents.InputReachedTarget: eventObject = SynchronizedInputPatternIdentifiers.InputReachedTargetEvent; break; case AutomationEvents.InputReachedOtherElement: eventObject = SynchronizedInputPatternIdentifiers.InputReachedOtherElementEvent; break; case AutomationEvents.InputDiscarded: eventObject = SynchronizedInputPatternIdentifiers.InputDiscardedEvent; break; default: throw new ArgumentException(SR.Get(SRID.Automation_InvalidEventId), "eventId"); } if ((eventObject != null) && (!_eventsTable.ContainsKey(eventObject.Id))) { eventObject = null; } return (eventObject); } internal static void AddEvent(int idEvent) { lock (_lock) { if (_eventsTable == null) _eventsTable = new Hashtable(20, .1f); if (_eventsTable.ContainsKey(idEvent)) { EventInfo info = (EventInfo)_eventsTable[idEvent]; info.NumberOfListeners++; } // to avoid unbound memory allocations, // register only events that we recognize else if (IsKnownEvent(idEvent)) { _eventsTable[idEvent] = new EventInfo(); } } } internal static void RemoveEvent(int idEvent) { lock (_lock) { if (_eventsTable != null) { // Decrement the count of listeners for this event if (_eventsTable.ContainsKey(idEvent)) { EventInfo info = (EventInfo)_eventsTable[idEvent]; // Update or remove the entry based on remaining listeners info.NumberOfListeners--; if (info.NumberOfListeners <= 0) { _eventsTable.Remove(idEvent); // If no more entries exist kill the table if (_eventsTable.Count == 0) { _eventsTable = null; } } } } } } // Unlike GetRegisteredEvent below, // HasRegisteredEvent does NOT cause automation DLLs loading internal static bool HasRegisteredEvent(AutomationEvents eventId) { lock (_lock) { if (_eventsTable != null && _eventsTable.Count != 0) { return (GetRegisteredEventObjectHelper(eventId) != null); } } return (false); } internal static AutomationEvent GetRegisteredEvent(AutomationEvents eventId) { lock (_lock) { if (_eventsTable != null && _eventsTable.Count != 0) { return (GetRegisteredEventObjectHelper(eventId)); } } return (null); } private static Hashtable _eventsTable; // key=event id, data=listener count private readonly static object _lock = new object(); } } // File provided for Reference Use Only by Microsoft Corporation (c) 2007. // Copyright (c) Microsoft Corporation. All rights reserved.
Link Menu
This book is available now!
Buy at Amazon US or
Buy at Amazon UK
- BooleanFacetDescriptionElement.cs
- PreviewPageInfo.cs
- FlowLayout.cs
- List.cs
- IPAddress.cs
- InvalidPrinterException.cs
- DataGridHeaderBorder.cs
- RequiredAttributeAttribute.cs
- EntityDataSourceChangingEventArgs.cs
- MultiTargetingUtil.cs
- HostingEnvironmentException.cs
- ScriptReferenceEventArgs.cs
- NCryptNative.cs
- ClickablePoint.cs
- DataGridViewUtilities.cs
- EntityDataSourceViewSchema.cs
- ReadOnlyCollectionBase.cs
- OracleException.cs
- Container.cs
- WhiteSpaceTrimStringConverter.cs
- XmlSchemaObject.cs
- XPathDocument.cs
- Base64WriteStateInfo.cs
- DesignerResources.cs
- PrintPreviewDialog.cs
- ImageButton.cs
- BuiltInPermissionSets.cs
- ProcessModelSection.cs
- FormsAuthenticationConfiguration.cs
- TableCellCollection.cs
- KeyNotFoundException.cs
- TailPinnedEventArgs.cs
- LayoutUtils.cs
- ErrorInfoXmlDocument.cs
- ColorPalette.cs
- OutputScopeManager.cs
- PassportAuthenticationEventArgs.cs
- Helper.cs
- TraceHandler.cs
- SafeProcessHandle.cs
- CellConstantDomain.cs
- StringInfo.cs
- SystemPens.cs
- InheritanceService.cs
- WebMethodAttribute.cs
- XMLSyntaxException.cs
- RtfToken.cs
- HTTPNotFoundHandler.cs
- OdbcConnectionString.cs
- TimeZoneNotFoundException.cs
- SqlGenerator.cs
- XmlLanguageConverter.cs
- BooleanToVisibilityConverter.cs
- ActiveXSerializer.cs
- SqlUserDefinedAggregateAttribute.cs
- Viewport3DVisual.cs
- SQLInt16Storage.cs
- WindowsScrollBarBits.cs
- OAVariantLib.cs
- ObjectNotFoundException.cs
- ConnectionStringsExpressionBuilder.cs
- ApplicationActivator.cs
- NetTcpSecurityElement.cs
- CodeMethodReturnStatement.cs
- BamlResourceSerializer.cs
- XmlReflectionImporter.cs
- SubpageParaClient.cs
- PasswordValidationException.cs
- DataServiceException.cs
- TransformerInfo.cs
- GridViewCancelEditEventArgs.cs
- ServiceErrorHandler.cs
- MaskedTextBox.cs
- PeerTransportSecurityElement.cs
- arc.cs
- BaseUriWithWildcard.cs
- RegistryConfigurationProvider.cs
- RelationshipFixer.cs
- View.cs
- EntitySqlQueryState.cs
- DoubleAnimationUsingPath.cs
- SourceItem.cs
- Action.cs
- MD5.cs
- EtwTrace.cs
- Canvas.cs
- ParserOptions.cs
- PrintDocument.cs
- Soap12ProtocolReflector.cs
- Predicate.cs
- DesignOnlyAttribute.cs
- CDSsyncETWBCLProvider.cs
- WebPartCancelEventArgs.cs
- MaterialCollection.cs
- EntityDataSourceContextDisposingEventArgs.cs
- SchemaElementLookUpTable.cs
- UrlMappingsModule.cs
- TreeNodeConverter.cs
- CachingHintValidation.cs
- PrincipalPermission.cs