Code:
/ 4.0 / 4.0 / DEVDIV_TFS / Dev10 / Releases / RTMRel / wpf / src / Base / System / Windows / Interop / ComponentDispatcherThread.cs / 1305600 / ComponentDispatcherThread.cs
//------------------------------------------------------------------------------ //// Copyright (c) Microsoft Corporation. All rights reserved. // //----------------------------------------------------------------------------- using System; using MS.Win32; using System.Globalization; using System.Security; using System.Security.Permissions; using MS.Internal.WindowsBase; namespace System.Windows.Interop { ////// This is a class used to implement per-thread instance of the ComponentDispatcher. /// internal class ComponentDispatcherThread { ////// Returns true if one or more components has gone modal. /// Although once one component is modal a 2nd shouldn't. /// public bool IsThreadModal { get { return (_modalCount > 0); } } ////// Returns "current" message. More exactly the last MSG Raised. /// ////// Critical: This is blocked off as defense in depth to avoid leaking message information /// public MSG CurrentKeyboardMessage { [SecurityCritical] get { return _currentKeyboardMSG; } [SecurityCritical] set { _currentKeyboardMSG = value; } } ////// A component calls this to go modal. Current thread wide only. /// ////// Critical: This is blocked off as defense in depth /// [SecurityCritical] public void PushModal() { _modalCount += 1; if(1 == _modalCount) { if(null != _enterThreadModal) _enterThreadModal(null, EventArgs.Empty); } } ////// A component calls this to end being modal. /// ////// Critical: This is blocked off as defense in depth to avoid tampering with input /// [SecurityCritical] public void PopModal() { _modalCount -= 1; if(0 == _modalCount) { if(null != _leaveThreadModal) _leaveThreadModal(null, EventArgs.Empty); } if(_modalCount < 0) _modalCount = 0; // Throwing is also good } ////// The message loop pumper calls this when it is time to do idle processing. /// ////// Critical: This is blocked off as defense in depth /// [SecurityCritical] public void RaiseIdle() { if(null != _threadIdle) _threadIdle(null, EventArgs.Empty); } ////// The message loop pumper calls this for every keyboard message. /// ////// Critical: This is blocked off as defense in depth to prevent message leakage /// [SecurityCritical] public bool RaiseThreadMessage(ref MSG msg) { bool handled = false; if (null != _threadFilterMessage) _threadFilterMessage(ref msg, ref handled); if (handled) return handled; if (null != _threadPreprocessMessage) _threadPreprocessMessage(ref msg, ref handled); return handled; } ////// Components register delegates with this event to handle /// thread idle processing. /// ////// Critical: This is blocked off as defense in depth and is used to transmit input related information /// public event EventHandler ThreadIdle { [SecurityCritical] add { _threadIdle += value; } [SecurityCritical] remove { _threadIdle -= value; } } ////// Critical: This is blocked off as defense in depth and is used to transmit input related information /// [method:SecurityCritical] private event EventHandler _threadIdle; ////// Components register delegates with this event to handle /// Keyboard Messages (first chance processing). /// ////// Critical: This is blocked off as defense in depth and is used to transmit input related information /// public event ThreadMessageEventHandler ThreadFilterMessage { [SecurityCritical] add { _threadFilterMessage += value; } [SecurityCritical] remove { _threadFilterMessage -= value; } } ////// Critical: This is blocked off as defense in depth and is used to transmit input related information /// [method:SecurityCritical] private event ThreadMessageEventHandler _threadFilterMessage; ////// Components register delegates with this event to handle /// Keyboard Messages (second chance processing). /// ////// Critical: This is blocked off as defense in depth and is used to transmit input related information /// public event ThreadMessageEventHandler ThreadPreprocessMessage { [SecurityCritical] add { _threadPreprocessMessage += value; } [SecurityCritical] remove { _threadPreprocessMessage -= value; } } ////// Adds the specified handler to the front of the invocation list /// of the PreprocessMessage event. /// /// /// Critical: This is blocked off as defense in depth and is used /// to transmit input related information /// [SecurityCritical] public void AddThreadPreprocessMessageHandlerFirst(ThreadMessageEventHandler handler) { _threadPreprocessMessage = (ThreadMessageEventHandler)Delegate.Combine(handler, _threadPreprocessMessage); } ////// Removes the first occurance of the specified handler from the /// invocation list of the PreprocessMessage event. /// /// /// Critical: This is blocked off as defense in depth and is used /// to transmit input related information /// [SecurityCritical] public void RemoveThreadPreprocessMessageHandlerFirst(ThreadMessageEventHandler handler) { if (_threadPreprocessMessage != null) { ThreadMessageEventHandler newHandler = null; foreach (ThreadMessageEventHandler testHandler in _threadPreprocessMessage.GetInvocationList()) { if (testHandler == handler) { // This is the handler to remove. We should not check // for any more occurances. handler = null; } else { newHandler += testHandler; } } _threadPreprocessMessage = newHandler; } } ////// Critical: This is blocked off as defense in depth and is used to transmit input related information /// [method:SecurityCritical] private event ThreadMessageEventHandler _threadPreprocessMessage; ////// Components register delegates with this event to handle /// a component on this thread has "gone modal", when previously none were. /// ////// Critical: This is blocked off as defense in depth and is used to transmit input related information /// public event EventHandler EnterThreadModal { [SecurityCritical] add { _enterThreadModal += value; } [SecurityCritical] remove { _enterThreadModal -= value; } } ////// Critical: This is blocked off as defense in depth and is used to transmit input related information /// [method:SecurityCritical] private event EventHandler _enterThreadModal; ////// Components register delegates with this event to handle /// all components on this thread are done being modal. /// ////// Critical: This is blocked off as defense in depth and is used to transmit input related information /// public event EventHandler LeaveThreadModal { [SecurityCritical] add { _leaveThreadModal += value; } [SecurityCritical] remove { _leaveThreadModal -= value; } } ////// Critical: This is blocked off as defense in depth and is used to transmit input related information /// [method:SecurityCritical] private event EventHandler _leaveThreadModal; private int _modalCount; ////// Critical: This holds the last message that was recieved /// [SecurityCritical] private MSG _currentKeyboardMSG; } } // File provided for Reference Use Only by Microsoft Corporation (c) 2007. //------------------------------------------------------------------------------ //// Copyright (c) Microsoft Corporation. All rights reserved. // //----------------------------------------------------------------------------- using System; using MS.Win32; using System.Globalization; using System.Security; using System.Security.Permissions; using MS.Internal.WindowsBase; namespace System.Windows.Interop { ////// This is a class used to implement per-thread instance of the ComponentDispatcher. /// internal class ComponentDispatcherThread { ////// Returns true if one or more components has gone modal. /// Although once one component is modal a 2nd shouldn't. /// public bool IsThreadModal { get { return (_modalCount > 0); } } ////// Returns "current" message. More exactly the last MSG Raised. /// ////// Critical: This is blocked off as defense in depth to avoid leaking message information /// public MSG CurrentKeyboardMessage { [SecurityCritical] get { return _currentKeyboardMSG; } [SecurityCritical] set { _currentKeyboardMSG = value; } } ////// A component calls this to go modal. Current thread wide only. /// ////// Critical: This is blocked off as defense in depth /// [SecurityCritical] public void PushModal() { _modalCount += 1; if(1 == _modalCount) { if(null != _enterThreadModal) _enterThreadModal(null, EventArgs.Empty); } } ////// A component calls this to end being modal. /// ////// Critical: This is blocked off as defense in depth to avoid tampering with input /// [SecurityCritical] public void PopModal() { _modalCount -= 1; if(0 == _modalCount) { if(null != _leaveThreadModal) _leaveThreadModal(null, EventArgs.Empty); } if(_modalCount < 0) _modalCount = 0; // Throwing is also good } ////// The message loop pumper calls this when it is time to do idle processing. /// ////// Critical: This is blocked off as defense in depth /// [SecurityCritical] public void RaiseIdle() { if(null != _threadIdle) _threadIdle(null, EventArgs.Empty); } ////// The message loop pumper calls this for every keyboard message. /// ////// Critical: This is blocked off as defense in depth to prevent message leakage /// [SecurityCritical] public bool RaiseThreadMessage(ref MSG msg) { bool handled = false; if (null != _threadFilterMessage) _threadFilterMessage(ref msg, ref handled); if (handled) return handled; if (null != _threadPreprocessMessage) _threadPreprocessMessage(ref msg, ref handled); return handled; } ////// Components register delegates with this event to handle /// thread idle processing. /// ////// Critical: This is blocked off as defense in depth and is used to transmit input related information /// public event EventHandler ThreadIdle { [SecurityCritical] add { _threadIdle += value; } [SecurityCritical] remove { _threadIdle -= value; } } ////// Critical: This is blocked off as defense in depth and is used to transmit input related information /// [method:SecurityCritical] private event EventHandler _threadIdle; ////// Components register delegates with this event to handle /// Keyboard Messages (first chance processing). /// ////// Critical: This is blocked off as defense in depth and is used to transmit input related information /// public event ThreadMessageEventHandler ThreadFilterMessage { [SecurityCritical] add { _threadFilterMessage += value; } [SecurityCritical] remove { _threadFilterMessage -= value; } } ////// Critical: This is blocked off as defense in depth and is used to transmit input related information /// [method:SecurityCritical] private event ThreadMessageEventHandler _threadFilterMessage; ////// Components register delegates with this event to handle /// Keyboard Messages (second chance processing). /// ////// Critical: This is blocked off as defense in depth and is used to transmit input related information /// public event ThreadMessageEventHandler ThreadPreprocessMessage { [SecurityCritical] add { _threadPreprocessMessage += value; } [SecurityCritical] remove { _threadPreprocessMessage -= value; } } ////// Adds the specified handler to the front of the invocation list /// of the PreprocessMessage event. /// /// /// Critical: This is blocked off as defense in depth and is used /// to transmit input related information /// [SecurityCritical] public void AddThreadPreprocessMessageHandlerFirst(ThreadMessageEventHandler handler) { _threadPreprocessMessage = (ThreadMessageEventHandler)Delegate.Combine(handler, _threadPreprocessMessage); } ////// Removes the first occurance of the specified handler from the /// invocation list of the PreprocessMessage event. /// /// /// Critical: This is blocked off as defense in depth and is used /// to transmit input related information /// [SecurityCritical] public void RemoveThreadPreprocessMessageHandlerFirst(ThreadMessageEventHandler handler) { if (_threadPreprocessMessage != null) { ThreadMessageEventHandler newHandler = null; foreach (ThreadMessageEventHandler testHandler in _threadPreprocessMessage.GetInvocationList()) { if (testHandler == handler) { // This is the handler to remove. We should not check // for any more occurances. handler = null; } else { newHandler += testHandler; } } _threadPreprocessMessage = newHandler; } } ////// Critical: This is blocked off as defense in depth and is used to transmit input related information /// [method:SecurityCritical] private event ThreadMessageEventHandler _threadPreprocessMessage; ////// Components register delegates with this event to handle /// a component on this thread has "gone modal", when previously none were. /// ////// Critical: This is blocked off as defense in depth and is used to transmit input related information /// public event EventHandler EnterThreadModal { [SecurityCritical] add { _enterThreadModal += value; } [SecurityCritical] remove { _enterThreadModal -= value; } } ////// Critical: This is blocked off as defense in depth and is used to transmit input related information /// [method:SecurityCritical] private event EventHandler _enterThreadModal; ////// Components register delegates with this event to handle /// all components on this thread are done being modal. /// ////// Critical: This is blocked off as defense in depth and is used to transmit input related information /// public event EventHandler LeaveThreadModal { [SecurityCritical] add { _leaveThreadModal += value; } [SecurityCritical] remove { _leaveThreadModal -= value; } } ////// Critical: This is blocked off as defense in depth and is used to transmit input related information /// [method:SecurityCritical] private event EventHandler _leaveThreadModal; private int _modalCount; ////// Critical: This holds the last message that was recieved /// [SecurityCritical] private MSG _currentKeyboardMSG; } } // 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
- COM2Enum.cs
- StrongNamePublicKeyBlob.cs
- SmtpSection.cs
- PolicyLevel.cs
- Soap.cs
- AutomationProperty.cs
- SystemIPGlobalStatistics.cs
- EntityDataSourceChangedEventArgs.cs
- VisualProxy.cs
- Filter.cs
- Baml2006ReaderSettings.cs
- Animatable.cs
- ValidationPropertyAttribute.cs
- RuntimeResourceSet.cs
- EventSourceCreationData.cs
- Propagator.ExtentPlaceholderCreator.cs
- PrefixQName.cs
- BitmapEffectOutputConnector.cs
- ApplyImportsAction.cs
- SoapHeaderAttribute.cs
- HostProtectionException.cs
- XPathException.cs
- RefType.cs
- PolyLineSegmentFigureLogic.cs
- OleDbConnection.cs
- _Semaphore.cs
- NavigationPropertyEmitter.cs
- HtmlEmptyTagControlBuilder.cs
- RijndaelManaged.cs
- Knowncolors.cs
- XMLSchema.cs
- xdrvalidator.cs
- UnsafeNativeMethods.cs
- HideDisabledControlAdapter.cs
- TileModeValidation.cs
- XhtmlBasicPanelAdapter.cs
- SliderAutomationPeer.cs
- DBConnection.cs
- MenuCommands.cs
- webproxy.cs
- XmlSchemaImport.cs
- PhysicalAddress.cs
- SignatureDescription.cs
- ContextBase.cs
- DataGridColumnCollectionEditor.cs
- _NegotiateClient.cs
- TextPointer.cs
- MimeMapping.cs
- FormsAuthenticationConfiguration.cs
- FixedPage.cs
- DataServiceConfiguration.cs
- InternalControlCollection.cs
- CustomLineCap.cs
- OleDbConnectionPoolGroupProviderInfo.cs
- BuildManager.cs
- ShapingWorkspace.cs
- Comparer.cs
- ParseChildrenAsPropertiesAttribute.cs
- TrustLevelCollection.cs
- Codec.cs
- BitmapImage.cs
- ObservableCollectionDefaultValueFactory.cs
- X509CertificateCollection.cs
- ClientRoleProvider.cs
- FaultDescription.cs
- StringComparer.cs
- PreparingEnlistment.cs
- WebSysDefaultValueAttribute.cs
- EventTask.cs
- DynamicField.cs
- Pointer.cs
- ColorConvertedBitmapExtension.cs
- OutputCacheSettings.cs
- MenuItemCollection.cs
- UserValidatedEventArgs.cs
- DbConvert.cs
- srgsitem.cs
- FileDialog.cs
- Header.cs
- TCPListener.cs
- TabPage.cs
- CheckBox.cs
- ComboBoxRenderer.cs
- NumericPagerField.cs
- httpapplicationstate.cs
- CompositeScriptReferenceEventArgs.cs
- HttpConfigurationSystem.cs
- TriggerAction.cs
- PerfCounterSection.cs
- ListBindingHelper.cs
- StylusButton.cs
- ArgumentDesigner.xaml.cs
- WebZoneDesigner.cs
- WebServiceTypeData.cs
- PropertyToken.cs
- TypeSystem.cs
- ManualResetEventSlim.cs
- IPAddressCollection.cs
- ConfigXmlCDataSection.cs
- HMACSHA1.cs