Code:
/ Net / Net / 3.5.50727.3053 / DEVDIV / depot / DevDiv / releases / Orcas / SP / 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
- JavaScriptSerializer.cs
- HttpModuleActionCollection.cs
- TcpStreams.cs
- ClipboardData.cs
- SingleResultAttribute.cs
- LocationReferenceEnvironment.cs
- ToolStripItemTextRenderEventArgs.cs
- ProjectionCamera.cs
- ThemeDictionaryExtension.cs
- SqlInfoMessageEvent.cs
- WebPartCancelEventArgs.cs
- TriggerCollection.cs
- SuppressIldasmAttribute.cs
- StagingAreaInputItem.cs
- RegexInterpreter.cs
- ElementHostAutomationPeer.cs
- PeerSecurityManager.cs
- OdbcConnectionPoolProviderInfo.cs
- ButtonAutomationPeer.cs
- TypeElementCollection.cs
- PreloadHost.cs
- XAMLParseException.cs
- SessionPageStatePersister.cs
- GcSettings.cs
- TrustManager.cs
- TimeoutValidationAttribute.cs
- TextWriter.cs
- CryptoProvider.cs
- ResXDataNode.cs
- Clause.cs
- _ListenerRequestStream.cs
- Setter.cs
- XmlConvert.cs
- AutoSizeComboBox.cs
- thaishape.cs
- XmlCodeExporter.cs
- XmlBinaryReader.cs
- NumericUpDownAccelerationCollection.cs
- ItemsControl.cs
- Quad.cs
- DataContractSerializerSection.cs
- OutputCacheProfileCollection.cs
- Point3DAnimationBase.cs
- InkCanvasInnerCanvas.cs
- HttpStreamXmlDictionaryReader.cs
- DayRenderEvent.cs
- unsafenativemethodsother.cs
- PixelFormat.cs
- TableHeaderCell.cs
- XmlAttribute.cs
- ProfilePropertySettingsCollection.cs
- WorkflowPrinting.cs
- CustomValidator.cs
- AuthorizationSection.cs
- FrameworkElementFactory.cs
- QueryCoreOp.cs
- DetailsView.cs
- AndCondition.cs
- TreeViewAutomationPeer.cs
- processwaithandle.cs
- HtmlTableRowCollection.cs
- RuntimeResourceSet.cs
- CqlWriter.cs
- StrongTypingException.cs
- XpsImage.cs
- XamlPointCollectionSerializer.cs
- SecurityPermission.cs
- TableAdapterManagerMethodGenerator.cs
- IHttpResponseInternal.cs
- PhysicalFontFamily.cs
- BaseCollection.cs
- UdpTransportBindingElement.cs
- DataTableMapping.cs
- XhtmlBasicPhoneCallAdapter.cs
- ProtocolState.cs
- DetailsViewDeleteEventArgs.cs
- ClientCultureInfo.cs
- CompilationLock.cs
- DataIdProcessor.cs
- NativeMethods.cs
- ExpressionCopier.cs
- StandardTransformFactory.cs
- ImportStoreException.cs
- MembershipValidatePasswordEventArgs.cs
- Resources.Designer.cs
- returneventsaver.cs
- QilXmlReader.cs
- SafeIUnknown.cs
- WindowsBrush.cs
- ExpressionBindings.cs
- SignatureDescription.cs
- BamlTreeNode.cs
- HttpContext.cs
- DateTimeConverter.cs
- SessionStateModule.cs
- HttpHandlersSection.cs
- PageParserFilter.cs
- CompilerResults.cs
- Tablet.cs
- InfoCardClaim.cs