Code:
/ Dotnetfx_Vista_SP2 / Dotnetfx_Vista_SP2 / 8.0.50727.4016 / DEVDIV / depot / DevDiv / releases / Orcas / QFE / wpf / src / Core / CSharp / MS / Internal / Automation / EventMap.cs / 1 / 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 )
{
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;
default:
throw new ArgumentException(SR.Get(SRID.Automation_InvalidEventId), "eventId");
}
if (!_eventsTable.ContainsKey(eventObject.Id))
{
eventObject = null;
}
return (eventObject);
}
internal static void AddEvent(int idEvent)
{
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)
{
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)
{
if (_eventsTable != null && _eventsTable.Count != 0)
{
return (GetRegisteredEventObjectHelper(eventId) != null);
}
return (false);
}
internal static AutomationEvent GetRegisteredEvent(AutomationEvents eventId)
{
if (_eventsTable != null && _eventsTable.Count != 0)
{
return (GetRegisteredEventObjectHelper(eventId));
}
return (null);
}
private static Hashtable _eventsTable; // key=event id, data=listener count
}
}
// File provided for Reference Use Only by Microsoft Corporation (c) 2007.
// Copyright (c) Microsoft Corporation. All rights reserved.
//----------------------------------------------------------------------------
//
//
// 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 )
{
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;
default:
throw new ArgumentException(SR.Get(SRID.Automation_InvalidEventId), "eventId");
}
if (!_eventsTable.ContainsKey(eventObject.Id))
{
eventObject = null;
}
return (eventObject);
}
internal static void AddEvent(int idEvent)
{
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)
{
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)
{
if (_eventsTable != null && _eventsTable.Count != 0)
{
return (GetRegisteredEventObjectHelper(eventId) != null);
}
return (false);
}
internal static AutomationEvent GetRegisteredEvent(AutomationEvents eventId)
{
if (_eventsTable != null && _eventsTable.Count != 0)
{
return (GetRegisteredEventObjectHelper(eventId));
}
return (null);
}
private static Hashtable _eventsTable; // key=event id, data=listener count
}
}
// 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
- TimeSpanMinutesConverter.cs
- NullableDecimalSumAggregationOperator.cs
- Drawing.cs
- TempFiles.cs
- MultiView.cs
- WsrmTraceRecord.cs
- DiscoveryExceptionDictionary.cs
- HelpInfo.cs
- DataTemplateSelector.cs
- ListSortDescription.cs
- EntityDataReader.cs
- ProxyWebPartConnectionCollection.cs
- Control.cs
- Registry.cs
- TextRunProperties.cs
- UniqueIdentifierService.cs
- SessionStateItemCollection.cs
- XPathNavigator.cs
- ObjectSecurity.cs
- XmlCodeExporter.cs
- Trace.cs
- SapiAttributeParser.cs
- SourceItem.cs
- ResourceManager.cs
- ExtenderHelpers.cs
- PointHitTestResult.cs
- ValuePattern.cs
- PathGradientBrush.cs
- NetMsmqSecurityElement.cs
- ApplicationBuildProvider.cs
- EventInfo.cs
- ColumnMapTranslator.cs
- TableLayoutPanelCellPosition.cs
- assertwrapper.cs
- XmlSchemaCompilationSettings.cs
- SemaphoreSecurity.cs
- DataSourceHelper.cs
- DataGridViewRowDividerDoubleClickEventArgs.cs
- WebPartEditVerb.cs
- NamespaceCollection.cs
- HttpCapabilitiesSectionHandler.cs
- mediapermission.cs
- AuthenticationSection.cs
- NativeRightsManagementAPIsStructures.cs
- XmlLanguageConverter.cs
- SharedConnectionWorkflowTransactionService.cs
- DataBoundControlHelper.cs
- WindowsTab.cs
- SHA512CryptoServiceProvider.cs
- HotCommands.cs
- SqlParameter.cs
- SignatureToken.cs
- TriggerCollection.cs
- TextSpanModifier.cs
- DesignConnectionCollection.cs
- ViewStateException.cs
- CommandBindingCollection.cs
- AffineTransform3D.cs
- PenThread.cs
- Int32.cs
- Utils.cs
- TableAutomationPeer.cs
- TypedColumnHandler.cs
- RoutedEvent.cs
- KeyBinding.cs
- BoundField.cs
- CompilerLocalReference.cs
- EventWaitHandleSecurity.cs
- UserPreferenceChangedEventArgs.cs
- XPathParser.cs
- NativeMethods.cs
- OAVariantLib.cs
- CustomErrorCollection.cs
- ResolveNameEventArgs.cs
- PenThreadPool.cs
- AuthorizationContext.cs
- ContentHostHelper.cs
- SecurityState.cs
- QualifiedCellIdBoolean.cs
- Rect3DValueSerializer.cs
- InlineCollection.cs
- MenuBase.cs
- PrintPreviewDialog.cs
- SmtpNegotiateAuthenticationModule.cs
- ExpressionBuilder.cs
- NetworkInterface.cs
- NullableDecimalSumAggregationOperator.cs
- ValidationResult.cs
- BehaviorEditorPart.cs
- SymbolUsageManager.cs
- XmlSchemaObjectCollection.cs
- WhiteSpaceTrimStringConverter.cs
- ChildTable.cs
- PipelineDeploymentState.cs
- Delegate.cs
- ColorBuilder.cs
- ActivityPreviewDesigner.cs
- PartitionerQueryOperator.cs
- HttpServerVarsCollection.cs
- RequestCachePolicyConverter.cs