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
- KeyedHashAlgorithm.cs
- UseLicense.cs
- PageHandlerFactory.cs
- Component.cs
- OutputCacheProfile.cs
- OutputCacheSettingsSection.cs
- TypeLoadException.cs
- HttpListenerContext.cs
- RangeContentEnumerator.cs
- EmbeddedMailObject.cs
- CrossSiteScriptingValidation.cs
- XmlEntity.cs
- GCHandleCookieTable.cs
- CallbackException.cs
- SQlBooleanStorage.cs
- InputScopeAttribute.cs
- DataRowComparer.cs
- FlowNode.cs
- TableRowGroup.cs
- RuntimeConfigLKG.cs
- Transactions.cs
- SmtpNegotiateAuthenticationModule.cs
- IntPtr.cs
- ControlCachePolicy.cs
- MessageLogTraceRecord.cs
- wgx_render.cs
- ProviderIncompatibleException.cs
- CodeCompileUnit.cs
- Application.cs
- IOThreadTimer.cs
- MetaTableHelper.cs
- hresults.cs
- WebControlsSection.cs
- KeyedCollection.cs
- TemplateControlBuildProvider.cs
- WebPartVerbCollection.cs
- OdbcFactory.cs
- LicenseProviderAttribute.cs
- MemberInfoSerializationHolder.cs
- MDIWindowDialog.cs
- HelpEvent.cs
- TextCompositionManager.cs
- BulletedListEventArgs.cs
- XmlCharCheckingReader.cs
- MouseOverProperty.cs
- PageBreakRecord.cs
- DictionaryCustomTypeDescriptor.cs
- DeviceContext.cs
- RowUpdatingEventArgs.cs
- FormViewModeEventArgs.cs
- WebPartEventArgs.cs
- PagerSettings.cs
- WindowsStatusBar.cs
- TemplateLookupAction.cs
- DescendentsWalkerBase.cs
- DataObject.cs
- OdbcReferenceCollection.cs
- XmlUrlEditor.cs
- StretchValidation.cs
- TaskResultSetter.cs
- BridgeDataReader.cs
- Wizard.cs
- TemplatePagerField.cs
- LicenseException.cs
- SecurityChannelListener.cs
- AssertSection.cs
- OrderingExpression.cs
- BinaryReader.cs
- BaseConfigurationRecord.cs
- ValueUnavailableException.cs
- DispatcherObject.cs
- Transform3DGroup.cs
- TreeNodeConverter.cs
- CheckBoxRenderer.cs
- CapiNative.cs
- XmlSchemaSet.cs
- DbCommandTree.cs
- SqlUdtInfo.cs
- DbConnectionPoolCounters.cs
- UnsafeNativeMethodsMilCoreApi.cs
- AssemblySettingAttributes.cs
- ResXDataNode.cs
- SelectionEditor.cs
- DataServices.cs
- exports.cs
- ExpandCollapseProviderWrapper.cs
- RIPEMD160Managed.cs
- DataGridCommandEventArgs.cs
- ResourceReader.cs
- DropShadowBitmapEffect.cs
- ImmutableObjectAttribute.cs
- FlowDocumentFormatter.cs
- prefixendpointaddressmessagefiltertable.cs
- DropShadowBitmapEffect.cs
- ScrollProviderWrapper.cs
- TextBoxBase.cs
- StringConverter.cs
- TemplateControlParser.cs
- HttpCachePolicyElement.cs
- BrushValueSerializer.cs