Code:
/ Dotnetfx_Vista_SP2 / Dotnetfx_Vista_SP2 / 8.0.50727.4016 / DEVDIV / depot / DevDiv / releases / Orcas / QFE / wpf / src / Base / System / Windows / Interop / ComponentDispatcher.cs / 1 / ComponentDispatcher.cs
//------------------------------------------------------------------------------
//
// Copyright (c) Microsoft Corporation. All rights reserved.
//
//-----------------------------------------------------------------------------
using System;
using System.Threading;
using System.Diagnostics.CodeAnalysis;
using System.Security;
using System.Security.Permissions;
using MS.Internal;
using MS.Win32;
using MS.Internal.WindowsBase;
namespace System.Windows.Interop
{
///
/// This is the delegate used for registering with the
/// ThreadFilterMessage and ThreadPreprocessMessage Events.
///
[SuppressMessage("Microsoft.Design", "CA1045:DoNotPassTypesByReference")]
public delegate void ThreadMessageEventHandler(ref MSG msg, ref bool handled);
///
/// This is a static class used to share control of the message pump.
/// Whomever is pumping (i.e. calling GetMessage()) will also send
/// the messages to RaiseThreadKeyMessage() which will dispatch them to
/// the ThreadFilterMessage and then (if not handled) to the ThreadPreprocessMessage
/// delegates. That way everyone can be included in the message loop.
/// Currently only Keyboard messages are supported.
/// There are also Events for Idle and facilities for Thread-Modal operation.
///
public static class ComponentDispatcher
{
static ComponentDispatcher()
{
_threadSlot = Thread.AllocateDataSlot();
}
private static ComponentDispatcherThread CurrentThreadData
{
get
{
ComponentDispatcherThread data;
object obj = Thread.GetData(_threadSlot);
if(null == obj)
{
data = new ComponentDispatcherThread();
Thread.SetData(_threadSlot, data);
}
else
{
data = (ComponentDispatcherThread) obj;
}
return data;
}
}
// Properties
///
/// Returns true if one or more components has gone modal.
/// Although once one component is modal a 2nd shouldn't.
///
///
/// Callers must have UIPermission(PermissionState.Unrestricted) to call this API.
///
///
/// Critical: This is blocked off as defense in depth
/// PublicOk: There is a demand here
///
public static bool IsThreadModal
{
[SecurityCritical]
get
{
SecurityHelper.DemandUnrestrictedUIPermission();
ComponentDispatcherThread data = ComponentDispatcher.CurrentThreadData;
return data.IsThreadModal;
}
}
///
/// Returns "current" message. More exactly the last MSG Raised.
///
///
/// Callers must have UIPermission(PermissionState.Unrestricted) to call this API.
///
///
/// Critical: This is blocked off as defense in depth
/// PublicOk: There is a demand here
///
public static MSG CurrentKeyboardMessage
{
[SecurityCritical]
get
{
SecurityHelper.DemandUnrestrictedUIPermission();
return ComponentDispatcher.CurrentThreadData.CurrentKeyboardMessage;
}
}
///
/// Returns "current" message. More exactly the last MSG Raised.
///
///
/// Critical: This is blocked off as defense in depth
///
internal static MSG UnsecureCurrentKeyboardMessage
{
[FriendAccessAllowed] // Built into Base, used by Core or Framework.
[SecurityCritical]
get
{
return ComponentDispatcher.CurrentThreadData.CurrentKeyboardMessage;
}
[FriendAccessAllowed] // Built into Base, used by Core or Framework.
[SecurityCritical]
set
{
ComponentDispatcher.CurrentThreadData.CurrentKeyboardMessage = value;
}
}
// Methods
///
/// A component calls this to go modal. Current thread wide only.
///
///
/// Callers must have UIPermission(PermissionState.Unrestricted) to call this API.
///
///
/// Critical: This is blocked off as defense in depth
/// PublicOk: There is a demand here
///
[SecurityCritical]
public static void PushModal()
{
SecurityHelper.DemandUnrestrictedUIPermission();
ComponentDispatcherThread data = ComponentDispatcher.CurrentThreadData;
data.PushModal();
}
///
/// A component calls this to end being modal.
///
///
/// Callers must have UIPermission(PermissionState.Unrestricted) to call this API.
///
///
/// Critical: This is blocked off as defense in depth
/// PublicOk: There is a demand here
///
[SecurityCritical]
public static void PopModal()
{
SecurityHelper.DemandUnrestrictedUIPermission();
ComponentDispatcherThread data = ComponentDispatcher.CurrentThreadData;
data.PopModal();
}
///
/// The message loop pumper calls this when it is time to do idle processing.
///
///
/// Callers must have UIPermission(PermissionState.Unrestricted) to call this API.
///
///
/// Critical: This is blocked off as defense in depth
/// PublicOk: There is a demand here
///
[SecurityCritical]
[UIPermissionAttribute(SecurityAction.LinkDemand,Unrestricted=true)]
[SuppressMessage("Microsoft.Design", "CA1030:UseEventsWhereAppropriate")]
public static void RaiseIdle()
{
ComponentDispatcherThread data = ComponentDispatcher.CurrentThreadData;
data.RaiseIdle();
}
///
/// The message loop pumper calls this for every keyboard message.
///
///
/// Callers must have UIPermission(PermissionState.Unrestricted) to call this API.
///
///
/// Critical: This is blocked off as defense in depth
/// PublicOk: There is a demand here
///
[SecurityCritical]
[SuppressMessage("Microsoft.Design", "CA1030:UseEventsWhereAppropriate")]
[SuppressMessage("Microsoft.Design", "CA1045:DoNotPassTypesByReference")]
[UIPermissionAttribute(SecurityAction.LinkDemand, Unrestricted = true)]
public static bool RaiseThreadMessage(ref MSG msg)
{
ComponentDispatcherThread data = ComponentDispatcher.CurrentThreadData;
return data.RaiseThreadMessage(ref msg);
}
// Events
///
/// Components register delegates with this event to handle
/// thread idle processing.
///
///
/// Callers must have UIPermission(PermissionState.Unrestricted) to call this API.
///
///
/// Critical: This is blocked off as defense in depth
/// PublicOk: There is a demand here
///
public static event EventHandler ThreadIdle
{
[SecurityCritical]
add {
SecurityHelper.DemandUnrestrictedUIPermission();
ComponentDispatcher.CurrentThreadData.ThreadIdle += value;
}
[SecurityCritical]
remove {
SecurityHelper.DemandUnrestrictedUIPermission();
ComponentDispatcher.CurrentThreadData.ThreadIdle -= value;
}
}
///
/// Components register delegates with this event to handle
/// Keyboard Messages (first chance processing).
///
///
/// Callers must have UIPermission(PermissionState.Unrestricted) to call this API.
///
///
/// Critical: This is blocked off as defense in depth
/// PublicOk: There is a demand here
///
[SuppressMessage("Microsoft.Design", "CA1009:DeclareEventHandlersCorrectly")]
public static event ThreadMessageEventHandler ThreadFilterMessage
{
[SecurityCritical]
add {
SecurityHelper.DemandUnrestrictedUIPermission();
ComponentDispatcher.CurrentThreadData.ThreadFilterMessage += value;
}
[SecurityCritical]
remove {
SecurityHelper.DemandUnrestrictedUIPermission();
ComponentDispatcher.CurrentThreadData.ThreadFilterMessage -= value;
}
}
///
/// Components register delegates with this event to handle
/// Keyboard Messages (second chance processing).
///
///
/// Callers must have UIPermission(PermissionState.Unrestricted) to call this API.
///
///
/// Critical: This is blocked off as defense in depth The
/// only reason the code for add has a link demand is to
/// enable a test scenario for secure.exe.
/// PublicOk: There is a demand here
///
[SuppressMessage("Microsoft.Design", "CA1009:DeclareEventHandlersCorrectly")]
public static event ThreadMessageEventHandler ThreadPreprocessMessage
{
[UIPermissionAttribute(SecurityAction.LinkDemand, Unrestricted = true)]
[SecurityCritical]
add
{
ComponentDispatcher.CurrentThreadData.ThreadPreprocessMessage += value;
}
[SecurityCritical]
remove {
SecurityHelper.DemandUnrestrictedUIPermission();
ComponentDispatcher.CurrentThreadData.ThreadPreprocessMessage -= value;
}
}
///
/// Components register delegates with this event to handle
/// a component on this thread has "gone modal", when previously none were.
///
///
/// Callers must have UIPermission(PermissionState.Unrestricted) to call this API.
///
///
/// Critical: This is blocked off as defense in depth
/// PublicOk: There is a demand here
///
public static event EventHandler EnterThreadModal
{
[SecurityCritical]
add {
SecurityHelper.DemandUnrestrictedUIPermission();
ComponentDispatcher.CurrentThreadData.EnterThreadModal += value;
}
[SecurityCritical]
remove {
SecurityHelper.DemandUnrestrictedUIPermission();
ComponentDispatcher.CurrentThreadData.EnterThreadModal -= value;
}
}
///
/// Components register delegates with this event to handle
/// all components on this thread are done being modal.
///
///
/// Callers must have UIPermission(PermissionState.Unrestricted) to call this API.
///
///
/// Critical: This is blocked off as defense in depth
/// PublicOk: There is a demand here
///
public static event EventHandler LeaveThreadModal
{
[SecurityCritical]
add
{
SecurityHelper.DemandUnrestrictedUIPermission();
ComponentDispatcher.CurrentThreadData.LeaveThreadModal += value;
}
[SecurityCritical]
remove {
SecurityHelper.DemandUnrestrictedUIPermission();
ComponentDispatcher.CurrentThreadData.LeaveThreadModal -= value;
}
}
// member data
private static System.LocalDataStoreSlot _threadSlot;
}
};
// File provided for Reference Use Only by Microsoft Corporation (c) 2007.
//------------------------------------------------------------------------------
//
// Copyright (c) Microsoft Corporation. All rights reserved.
//
//-----------------------------------------------------------------------------
using System;
using System.Threading;
using System.Diagnostics.CodeAnalysis;
using System.Security;
using System.Security.Permissions;
using MS.Internal;
using MS.Win32;
using MS.Internal.WindowsBase;
namespace System.Windows.Interop
{
///
/// This is the delegate used for registering with the
/// ThreadFilterMessage and ThreadPreprocessMessage Events.
///
[SuppressMessage("Microsoft.Design", "CA1045:DoNotPassTypesByReference")]
public delegate void ThreadMessageEventHandler(ref MSG msg, ref bool handled);
///
/// This is a static class used to share control of the message pump.
/// Whomever is pumping (i.e. calling GetMessage()) will also send
/// the messages to RaiseThreadKeyMessage() which will dispatch them to
/// the ThreadFilterMessage and then (if not handled) to the ThreadPreprocessMessage
/// delegates. That way everyone can be included in the message loop.
/// Currently only Keyboard messages are supported.
/// There are also Events for Idle and facilities for Thread-Modal operation.
///
public static class ComponentDispatcher
{
static ComponentDispatcher()
{
_threadSlot = Thread.AllocateDataSlot();
}
private static ComponentDispatcherThread CurrentThreadData
{
get
{
ComponentDispatcherThread data;
object obj = Thread.GetData(_threadSlot);
if(null == obj)
{
data = new ComponentDispatcherThread();
Thread.SetData(_threadSlot, data);
}
else
{
data = (ComponentDispatcherThread) obj;
}
return data;
}
}
// Properties
///
/// Returns true if one or more components has gone modal.
/// Although once one component is modal a 2nd shouldn't.
///
///
/// Callers must have UIPermission(PermissionState.Unrestricted) to call this API.
///
///
/// Critical: This is blocked off as defense in depth
/// PublicOk: There is a demand here
///
public static bool IsThreadModal
{
[SecurityCritical]
get
{
SecurityHelper.DemandUnrestrictedUIPermission();
ComponentDispatcherThread data = ComponentDispatcher.CurrentThreadData;
return data.IsThreadModal;
}
}
///
/// Returns "current" message. More exactly the last MSG Raised.
///
///
/// Callers must have UIPermission(PermissionState.Unrestricted) to call this API.
///
///
/// Critical: This is blocked off as defense in depth
/// PublicOk: There is a demand here
///
public static MSG CurrentKeyboardMessage
{
[SecurityCritical]
get
{
SecurityHelper.DemandUnrestrictedUIPermission();
return ComponentDispatcher.CurrentThreadData.CurrentKeyboardMessage;
}
}
///
/// Returns "current" message. More exactly the last MSG Raised.
///
///
/// Critical: This is blocked off as defense in depth
///
internal static MSG UnsecureCurrentKeyboardMessage
{
[FriendAccessAllowed] // Built into Base, used by Core or Framework.
[SecurityCritical]
get
{
return ComponentDispatcher.CurrentThreadData.CurrentKeyboardMessage;
}
[FriendAccessAllowed] // Built into Base, used by Core or Framework.
[SecurityCritical]
set
{
ComponentDispatcher.CurrentThreadData.CurrentKeyboardMessage = value;
}
}
// Methods
///
/// A component calls this to go modal. Current thread wide only.
///
///
/// Callers must have UIPermission(PermissionState.Unrestricted) to call this API.
///
///
/// Critical: This is blocked off as defense in depth
/// PublicOk: There is a demand here
///
[SecurityCritical]
public static void PushModal()
{
SecurityHelper.DemandUnrestrictedUIPermission();
ComponentDispatcherThread data = ComponentDispatcher.CurrentThreadData;
data.PushModal();
}
///
/// A component calls this to end being modal.
///
///
/// Callers must have UIPermission(PermissionState.Unrestricted) to call this API.
///
///
/// Critical: This is blocked off as defense in depth
/// PublicOk: There is a demand here
///
[SecurityCritical]
public static void PopModal()
{
SecurityHelper.DemandUnrestrictedUIPermission();
ComponentDispatcherThread data = ComponentDispatcher.CurrentThreadData;
data.PopModal();
}
///
/// The message loop pumper calls this when it is time to do idle processing.
///
///
/// Callers must have UIPermission(PermissionState.Unrestricted) to call this API.
///
///
/// Critical: This is blocked off as defense in depth
/// PublicOk: There is a demand here
///
[SecurityCritical]
[UIPermissionAttribute(SecurityAction.LinkDemand,Unrestricted=true)]
[SuppressMessage("Microsoft.Design", "CA1030:UseEventsWhereAppropriate")]
public static void RaiseIdle()
{
ComponentDispatcherThread data = ComponentDispatcher.CurrentThreadData;
data.RaiseIdle();
}
///
/// The message loop pumper calls this for every keyboard message.
///
///
/// Callers must have UIPermission(PermissionState.Unrestricted) to call this API.
///
///
/// Critical: This is blocked off as defense in depth
/// PublicOk: There is a demand here
///
[SecurityCritical]
[SuppressMessage("Microsoft.Design", "CA1030:UseEventsWhereAppropriate")]
[SuppressMessage("Microsoft.Design", "CA1045:DoNotPassTypesByReference")]
[UIPermissionAttribute(SecurityAction.LinkDemand, Unrestricted = true)]
public static bool RaiseThreadMessage(ref MSG msg)
{
ComponentDispatcherThread data = ComponentDispatcher.CurrentThreadData;
return data.RaiseThreadMessage(ref msg);
}
// Events
///
/// Components register delegates with this event to handle
/// thread idle processing.
///
///
/// Callers must have UIPermission(PermissionState.Unrestricted) to call this API.
///
///
/// Critical: This is blocked off as defense in depth
/// PublicOk: There is a demand here
///
public static event EventHandler ThreadIdle
{
[SecurityCritical]
add {
SecurityHelper.DemandUnrestrictedUIPermission();
ComponentDispatcher.CurrentThreadData.ThreadIdle += value;
}
[SecurityCritical]
remove {
SecurityHelper.DemandUnrestrictedUIPermission();
ComponentDispatcher.CurrentThreadData.ThreadIdle -= value;
}
}
///
/// Components register delegates with this event to handle
/// Keyboard Messages (first chance processing).
///
///
/// Callers must have UIPermission(PermissionState.Unrestricted) to call this API.
///
///
/// Critical: This is blocked off as defense in depth
/// PublicOk: There is a demand here
///
[SuppressMessage("Microsoft.Design", "CA1009:DeclareEventHandlersCorrectly")]
public static event ThreadMessageEventHandler ThreadFilterMessage
{
[SecurityCritical]
add {
SecurityHelper.DemandUnrestrictedUIPermission();
ComponentDispatcher.CurrentThreadData.ThreadFilterMessage += value;
}
[SecurityCritical]
remove {
SecurityHelper.DemandUnrestrictedUIPermission();
ComponentDispatcher.CurrentThreadData.ThreadFilterMessage -= value;
}
}
///
/// Components register delegates with this event to handle
/// Keyboard Messages (second chance processing).
///
///
/// Callers must have UIPermission(PermissionState.Unrestricted) to call this API.
///
///
/// Critical: This is blocked off as defense in depth The
/// only reason the code for add has a link demand is to
/// enable a test scenario for secure.exe.
/// PublicOk: There is a demand here
///
[SuppressMessage("Microsoft.Design", "CA1009:DeclareEventHandlersCorrectly")]
public static event ThreadMessageEventHandler ThreadPreprocessMessage
{
[UIPermissionAttribute(SecurityAction.LinkDemand, Unrestricted = true)]
[SecurityCritical]
add
{
ComponentDispatcher.CurrentThreadData.ThreadPreprocessMessage += value;
}
[SecurityCritical]
remove {
SecurityHelper.DemandUnrestrictedUIPermission();
ComponentDispatcher.CurrentThreadData.ThreadPreprocessMessage -= value;
}
}
///
/// Components register delegates with this event to handle
/// a component on this thread has "gone modal", when previously none were.
///
///
/// Callers must have UIPermission(PermissionState.Unrestricted) to call this API.
///
///
/// Critical: This is blocked off as defense in depth
/// PublicOk: There is a demand here
///
public static event EventHandler EnterThreadModal
{
[SecurityCritical]
add {
SecurityHelper.DemandUnrestrictedUIPermission();
ComponentDispatcher.CurrentThreadData.EnterThreadModal += value;
}
[SecurityCritical]
remove {
SecurityHelper.DemandUnrestrictedUIPermission();
ComponentDispatcher.CurrentThreadData.EnterThreadModal -= value;
}
}
///
/// Components register delegates with this event to handle
/// all components on this thread are done being modal.
///
///
/// Callers must have UIPermission(PermissionState.Unrestricted) to call this API.
///
///
/// Critical: This is blocked off as defense in depth
/// PublicOk: There is a demand here
///
public static event EventHandler LeaveThreadModal
{
[SecurityCritical]
add
{
SecurityHelper.DemandUnrestrictedUIPermission();
ComponentDispatcher.CurrentThreadData.LeaveThreadModal += value;
}
[SecurityCritical]
remove {
SecurityHelper.DemandUnrestrictedUIPermission();
ComponentDispatcher.CurrentThreadData.LeaveThreadModal -= value;
}
}
// member data
private static System.LocalDataStoreSlot _threadSlot;
}
};
// File provided for Reference Use Only by Microsoft Corporation (c) 2007.
Link Menu
This book is available now!
Buy at Amazon US or
Buy at Amazon UK
- QueryInterceptorAttribute.cs
- XmlDataLoader.cs
- Freezable.cs
- TextElement.cs
- ReturnValue.cs
- TickBar.cs
- XDeferredAxisSource.cs
- StreamingContext.cs
- TextEditorSelection.cs
- TextRange.cs
- FontInfo.cs
- ActivityBuilderXamlWriter.cs
- XmlDataSource.cs
- TextFormatterHost.cs
- ScrollEvent.cs
- Cell.cs
- SocketElement.cs
- HtmlWindow.cs
- SafeRightsManagementHandle.cs
- Helper.cs
- _SslStream.cs
- UniqueIdentifierService.cs
- TreeNodeClickEventArgs.cs
- Track.cs
- Semaphore.cs
- Renderer.cs
- ConfigurationPermission.cs
- PropertyEmitterBase.cs
- SchemaManager.cs
- Knowncolors.cs
- VariableQuery.cs
- AppLevelCompilationSectionCache.cs
- AttributeEmitter.cs
- XmlReaderDelegator.cs
- ComplexTypeEmitter.cs
- EntitySqlQueryBuilder.cs
- DataFieldConverter.cs
- TemplateBindingExtensionConverter.cs
- FixedNode.cs
- RuntimeUtils.cs
- ExpressionsCollectionEditor.cs
- ApplicationFileCodeDomTreeGenerator.cs
- _NetworkingPerfCounters.cs
- TypeSystemHelpers.cs
- DataGridViewCellStateChangedEventArgs.cs
- CacheSection.cs
- DataFormat.cs
- StateManagedCollection.cs
- TypeDelegator.cs
- FixedSOMLineRanges.cs
- X509SecurityToken.cs
- TdsParameterSetter.cs
- BindingGraph.cs
- CodeDomExtensionMethods.cs
- CommandLibraryHelper.cs
- WebResourceUtil.cs
- SQLUtility.cs
- DataSourceCache.cs
- UnorderedHashRepartitionStream.cs
- ComboBox.cs
- COM2FontConverter.cs
- Vector3DKeyFrameCollection.cs
- SqlRemoveConstantOrderBy.cs
- XsdDateTime.cs
- UrlAuthFailedErrorFormatter.cs
- FrameworkTemplate.cs
- LoadItemsEventArgs.cs
- SafeFileMappingHandle.cs
- QueryServiceConfigHandle.cs
- CompositeFontParser.cs
- CompilationSection.cs
- metadatamappinghashervisitor.hashsourcebuilder.cs
- Comparer.cs
- AssemblyResourceLoader.cs
- WebConfigurationFileMap.cs
- ContentIterators.cs
- DiscoveryDefaults.cs
- SmiXetterAccessMap.cs
- WindowsClaimSet.cs
- DataGridTextBox.cs
- ReversePositionQuery.cs
- FrameworkContentElement.cs
- StandardToolWindows.cs
- IxmlLineInfo.cs
- QilReplaceVisitor.cs
- ConditionBrowserDialog.cs
- BrowserDefinition.cs
- IdentityNotMappedException.cs
- UnmanagedHandle.cs
- LiteralControl.cs
- XmlQueryCardinality.cs
- ForAllOperator.cs
- SoapHttpTransportImporter.cs
- SmiTypedGetterSetter.cs
- StopRoutingHandler.cs
- RelationshipWrapper.cs
- ResourceReferenceExpression.cs
- HttpWebResponse.cs
- ImageIndexConverter.cs
- UInt32Storage.cs