Code:
/ Dotnetfx_Win7_3.5.1 / Dotnetfx_Win7_3.5.1 / 3.5.1 / DEVDIV / depot / DevDiv / releases / Orcas / NetFXw7 / wpf / src / Base / System / Windows / Interop / ComponentDispatcher.cs / 3 / 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: Exposing the raw input enables tampering. (The MSG structure is passed by-ref.) /// 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; } [UIPermissionAttribute(SecurityAction.LinkDemand, Unrestricted=true)] [SecurityCritical] remove { 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: Exposing the raw input enables tampering. (The MSG structure is passed by-ref.) /// 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; } [UIPermissionAttribute(SecurityAction.LinkDemand, Unrestricted=true)] [SecurityCritical] remove { 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
- DataGridViewSortCompareEventArgs.cs
- NamedElement.cs
- MruCache.cs
- Duration.cs
- Bind.cs
- CodeTypeOfExpression.cs
- DataGridViewDataErrorEventArgs.cs
- SetStoryboardSpeedRatio.cs
- LinkUtilities.cs
- RadioButtonDesigner.cs
- FileRecordSequenceCompletedAsyncResult.cs
- _AuthenticationState.cs
- translator.cs
- SystemFonts.cs
- LedgerEntryCollection.cs
- MarkupExtensionReturnTypeAttribute.cs
- LogAppendAsyncResult.cs
- MsmqIntegrationChannelFactory.cs
- PrtTicket_Public_Simple.cs
- EntityDataSourceEntitySetNameItem.cs
- XmlReflectionImporter.cs
- WebBrowserDocumentCompletedEventHandler.cs
- TextBlockAutomationPeer.cs
- DragCompletedEventArgs.cs
- StringExpressionSet.cs
- SignatureToken.cs
- LinkUtilities.cs
- Model3D.cs
- TableHeaderCell.cs
- IntegerValidatorAttribute.cs
- DataGridViewImageCell.cs
- LicenseContext.cs
- RelationshipEnd.cs
- RolePrincipal.cs
- ColorConvertedBitmap.cs
- LicenseContext.cs
- WorkflowDesignerColors.cs
- ImageAttributes.cs
- AnimationTimeline.cs
- CompositionAdorner.cs
- UnknownBitmapEncoder.cs
- XmlSchemaType.cs
- DataSetUtil.cs
- XmlAttributeHolder.cs
- FlowDocumentScrollViewerAutomationPeer.cs
- AspProxy.cs
- DocumentPage.cs
- Region.cs
- UrlUtility.cs
- DataGridViewButtonCell.cs
- XmlDictionaryString.cs
- DrawListViewColumnHeaderEventArgs.cs
- CodeStatement.cs
- AstNode.cs
- DoubleAnimationUsingPath.cs
- FormViewInsertEventArgs.cs
- SessionPageStatePersister.cs
- AuthenticatingEventArgs.cs
- ModuleConfigurationInfo.cs
- Filter.cs
- PropertyEmitter.cs
- TypeInitializationException.cs
- NativeMethods.cs
- TimelineClockCollection.cs
- Cursor.cs
- DataGridViewRowHeightInfoPushedEventArgs.cs
- XmlNodeChangedEventManager.cs
- EmbossBitmapEffect.cs
- DataRelationCollection.cs
- Win32SafeHandles.cs
- DataGridViewCellFormattingEventArgs.cs
- WebPartMenu.cs
- RequestBringIntoViewEventArgs.cs
- ReadOnlyDataSourceView.cs
- StyleConverter.cs
- UnionCodeGroup.cs
- TextRangeEditTables.cs
- HtmlButton.cs
- DtrList.cs
- DES.cs
- DesignerSerializerAttribute.cs
- ColumnWidthChangingEvent.cs
- WebServiceData.cs
- MemberHolder.cs
- DecoderFallback.cs
- counter.cs
- coordinatorscratchpad.cs
- WebScriptServiceHost.cs
- AesManaged.cs
- ActiveXSite.cs
- ListChangedEventArgs.cs
- DelegatingTypeDescriptionProvider.cs
- GenericsNotImplementedException.cs
- CroppedBitmap.cs
- Rfc2898DeriveBytes.cs
- InteropTrackingRecord.cs
- ExpressionVisitorHelpers.cs
- DispatcherExceptionFilterEventArgs.cs
- XhtmlMobileTextWriter.cs
- Boolean.cs