Code:
/ DotNET / DotNET / 8.0 / untmp / WIN_WINDOWS / lh_tools_devdiv_wpf / Windows / wcp / 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.
Link Menu
This book is available now!
Buy at Amazon US or
Buy at Amazon UK
- DataGridViewButtonColumn.cs
- TableLayoutSettings.cs
- X509CertificateClaimSet.cs
- FixUpCollection.cs
- SHA1Managed.cs
- RectConverter.cs
- DataBindingCollection.cs
- Wow64ConfigurationLoader.cs
- WinInetCache.cs
- CustomErrorsSectionWrapper.cs
- translator.cs
- BitmapFrameEncode.cs
- EdmToObjectNamespaceMap.cs
- ChannelServices.cs
- FrameworkContentElement.cs
- BooleanAnimationUsingKeyFrames.cs
- ResizeGrip.cs
- DataDocumentXPathNavigator.cs
- Calendar.cs
- WebServicesInteroperability.cs
- ComponentGuaranteesAttribute.cs
- CoTaskMemUnicodeSafeHandle.cs
- HttpWriter.cs
- XmlExceptionHelper.cs
- NumberSubstitution.cs
- PropertyMap.cs
- PropertyDescriptorCollection.cs
- Symbol.cs
- TimelineClockCollection.cs
- ClientRoleProvider.cs
- BatchServiceHost.cs
- dataSvcMapFileLoader.cs
- DocumentApplicationJournalEntry.cs
- ExtendedPropertyDescriptor.cs
- LiteralDesigner.cs
- MutableAssemblyCacheEntry.cs
- TreeWalker.cs
- NetWebProxyFinder.cs
- WebMessageEncoderFactory.cs
- FormsAuthentication.cs
- HttpResponseInternalWrapper.cs
- FlowPanelDesigner.cs
- XmlSchemaAny.cs
- EdmComplexPropertyAttribute.cs
- ConditionalAttribute.cs
- OperationValidationEventArgs.cs
- ListBindingConverter.cs
- SqlStream.cs
- ParameterCollection.cs
- ToolBarButtonClickEvent.cs
- ConstrainedDataObject.cs
- FileDialogPermission.cs
- LicenseException.cs
- SqlException.cs
- UnsafeNetInfoNativeMethods.cs
- WCFModelStrings.Designer.cs
- XhtmlConformanceSection.cs
- DataReaderContainer.cs
- ShadowGlyph.cs
- Misc.cs
- OleDbConnectionFactory.cs
- ListGeneralPage.cs
- SpellerHighlightLayer.cs
- ProjectionPath.cs
- RMPermissions.cs
- webbrowsersite.cs
- TextRunTypographyProperties.cs
- PlatformNotSupportedException.cs
- FunctionImportMapping.ReturnTypeRenameMapping.cs
- FixUpCollection.cs
- _SingleItemRequestCache.cs
- EntityDataSourceDesigner.cs
- SyndicationDeserializer.cs
- InstanceHandleReference.cs
- SplitContainer.cs
- SiteMapNodeItem.cs
- EntityConnectionStringBuilder.cs
- RawKeyboardInputReport.cs
- PipelineModuleStepContainer.cs
- SafeNativeMethods.cs
- MouseEvent.cs
- ParseNumbers.cs
- ColumnHeaderConverter.cs
- InternalPolicyElement.cs
- MD5CryptoServiceProvider.cs
- HostProtectionPermission.cs
- RichTextBoxAutomationPeer.cs
- BindingCollection.cs
- Pair.cs
- latinshape.cs
- DefaultWorkflowLoaderService.cs
- ButtonColumn.cs
- ObjectItemCollection.cs
- CustomErrorsSectionWrapper.cs
- WpfWebRequestHelper.cs
- SqlEnums.cs
- TypedRowHandler.cs
- ExtendedPropertyCollection.cs
- ConfigXmlSignificantWhitespace.cs
- ArrayList.cs