Code:
/ Dotnetfx_Win7_3.5.1 / Dotnetfx_Win7_3.5.1 / 3.5.1 / DEVDIV / depot / DevDiv / releases / Orcas / NetFXw7 / wpf / src / Framework / MS / Internal / Controls / ActiveXHelper.cs / 1 / ActiveXHelper.cs
//------------------------------------------------------------------------------ //// Copyright (c) Microsoft Corporation. All rights reserved. // // // // Description: // Helper functions for ActiveX hosting // // Source copied from axhosthelper.cs // // // History // 04/17/05 KusumaV Created // //----------------------------------------------------------------------------- using System; using System.Collections; using System.Collections.Specialized; using System.Runtime.InteropServices; using System.Security; using MS.Win32; namespace MS.Internal.Controls { // // This class contains static properties/methods that are internal. // It also has types that make sense only for ActiveX hosting classes. // In other words, this is a helper class for the ActiveX hosting classes. // internal class ActiveXHelper { // // Types: // // // Enumeration of the different states of the ActiveX control public enum ActiveXState { Passive = 0, // Not loaded Loaded = 1, // Loaded, but no server [ocx created] Running = 2, // Server running, invisible [depersisted] InPlaceActive = 4, // Server in-place active [visible] UIActive = 8, // Server is UI active [ready to accept input] Open = 16 // Server is opened for editing [not used] } // // Static members: // // // BitVector32 masks for various internal state flags. public static readonly int sinkAttached = BitVector32.CreateMask(); public static readonly int inTransition = BitVector32.CreateMask(sinkAttached); public static readonly int processingKeyUp = BitVector32.CreateMask(inTransition); //[kusumav]These are from Winforms code. These transforms were not working correctly //I used Avalon sizes but leaving these in here since they are used in TransformCoordinates //in ActiveXSite. It doesn't seem to be invoked by WebBrowser control // // Gets the LOGPIXELSX of the screen DC. private static int logPixelsX = -1; private static int logPixelsY = -1; private const int HMperInch = 2540; // Prevent compiler from generating public CTOR private ActiveXHelper() { } // // Static helper methods: // public static int Pix2HM(int pix, int logP) { return (HMperInch * pix + (logP >> 1)) / logP; } public static int HM2Pix(int hm, int logP) { return (logP * hm + HMperInch / 2) / HMperInch; } // // We cache LOGPIXELSX for optimization ////// Critical: This code calls critical code. /// TreatAsSafe: This information is safe to expose. /// public static int LogPixelsX { [SecurityCritical, SecurityTreatAsSafe] get { if (logPixelsX == -1) { IntPtr hDC = UnsafeNativeMethods.GetDC(NativeMethods.NullHandleRef); if (hDC != IntPtr.Zero) { logPixelsX = UnsafeNativeMethods.GetDeviceCaps(new HandleRef(null, hDC), NativeMethods.LOGPIXELSX); UnsafeNativeMethods.ReleaseDC(NativeMethods.NullHandleRef, new HandleRef(null, hDC)); } } return logPixelsX; } } public static void ResetLogPixelsX() { logPixelsX = -1; } // // We cache LOGPIXELSY for optimization ////// Critical: This code calls critical code. /// TreatAsSafe: This information is safe to expose. /// public static int LogPixelsY { [SecurityCritical, SecurityTreatAsSafe] get { if (logPixelsY == -1) { IntPtr hDC = UnsafeNativeMethods.GetDC(NativeMethods.NullHandleRef); if (hDC != IntPtr.Zero) { logPixelsY = UnsafeNativeMethods.GetDeviceCaps(new HandleRef(null, hDC), NativeMethods.LOGPIXELSY); UnsafeNativeMethods.ReleaseDC(NativeMethods.NullHandleRef, new HandleRef(null, hDC)); } } return logPixelsY; } } public static void ResetLogPixelsY() { logPixelsY = -1; } ////// Wraps a given managed object, expected to be enabled for IDispatch interop, in a native one that /// trivially delegates the IDispatch calls. This ensures that cross-context calls on the managed object /// occur on the same thread (assumed to be in an STA), not on some random RPC worker thread. /// ////// CLR objects are thread-agile. But nearly all COM objects we use are STA-bound, and we also need /// our implementations of COM interfaces to be called on the thread on which their object was created, /// often because of interacting with core WPF objects that also have thread affinity. /// Getting a CLR object to "stick to the right thread" when called from another context (like cross-process) /// turns out to be incredibly hard. WinForms has solved the problem with StandardOleMarshalObject. /// Unfortunately, it wasn't designed to work in partial trust. And apart from that, it just doesn't /// seem to work cross-process, which is what we actually need for the WebOC hosting. /// There's also the ContextBoundObject family. A derived object could be made thread-bound. But this /// doesn't work for us either, because we get deadlocks. COM allows re-entrancy when "blocked" on an /// outgoing call from an STA, but ContextBoundObject apparently doesn't--it really blocks. /// ////// Critical because of SUC. /// Since wrapping a managed object in a native one that trivially delegates IDispatch calls is safe, /// a caller of this method can generally be marked SecurityTreatAsSafe. /// [SuppressUnmanagedCodeSecurity, SecurityCritical] [DllImport(ExternDll.PresentationHostDll, PreserveSig=false)] [return: MarshalAs(UnmanagedType.IDispatch)] internal static extern object CreateIDispatchSTAForwarder([MarshalAs(UnmanagedType.IDispatch)] object pDispatchDelegate); } } // File provided for Reference Use Only by Microsoft Corporation (c) 2007. //------------------------------------------------------------------------------ //// Copyright (c) Microsoft Corporation. All rights reserved. // // // // Description: // Helper functions for ActiveX hosting // // Source copied from axhosthelper.cs // // // History // 04/17/05 KusumaV Created // //----------------------------------------------------------------------------- using System; using System.Collections; using System.Collections.Specialized; using System.Runtime.InteropServices; using System.Security; using MS.Win32; namespace MS.Internal.Controls { // // This class contains static properties/methods that are internal. // It also has types that make sense only for ActiveX hosting classes. // In other words, this is a helper class for the ActiveX hosting classes. // internal class ActiveXHelper { // // Types: // // // Enumeration of the different states of the ActiveX control public enum ActiveXState { Passive = 0, // Not loaded Loaded = 1, // Loaded, but no server [ocx created] Running = 2, // Server running, invisible [depersisted] InPlaceActive = 4, // Server in-place active [visible] UIActive = 8, // Server is UI active [ready to accept input] Open = 16 // Server is opened for editing [not used] } // // Static members: // // // BitVector32 masks for various internal state flags. public static readonly int sinkAttached = BitVector32.CreateMask(); public static readonly int inTransition = BitVector32.CreateMask(sinkAttached); public static readonly int processingKeyUp = BitVector32.CreateMask(inTransition); //[kusumav]These are from Winforms code. These transforms were not working correctly //I used Avalon sizes but leaving these in here since they are used in TransformCoordinates //in ActiveXSite. It doesn't seem to be invoked by WebBrowser control // // Gets the LOGPIXELSX of the screen DC. private static int logPixelsX = -1; private static int logPixelsY = -1; private const int HMperInch = 2540; // Prevent compiler from generating public CTOR private ActiveXHelper() { } // // Static helper methods: // public static int Pix2HM(int pix, int logP) { return (HMperInch * pix + (logP >> 1)) / logP; } public static int HM2Pix(int hm, int logP) { return (logP * hm + HMperInch / 2) / HMperInch; } // // We cache LOGPIXELSX for optimization ////// Critical: This code calls critical code. /// TreatAsSafe: This information is safe to expose. /// public static int LogPixelsX { [SecurityCritical, SecurityTreatAsSafe] get { if (logPixelsX == -1) { IntPtr hDC = UnsafeNativeMethods.GetDC(NativeMethods.NullHandleRef); if (hDC != IntPtr.Zero) { logPixelsX = UnsafeNativeMethods.GetDeviceCaps(new HandleRef(null, hDC), NativeMethods.LOGPIXELSX); UnsafeNativeMethods.ReleaseDC(NativeMethods.NullHandleRef, new HandleRef(null, hDC)); } } return logPixelsX; } } public static void ResetLogPixelsX() { logPixelsX = -1; } // // We cache LOGPIXELSY for optimization ////// Critical: This code calls critical code. /// TreatAsSafe: This information is safe to expose. /// public static int LogPixelsY { [SecurityCritical, SecurityTreatAsSafe] get { if (logPixelsY == -1) { IntPtr hDC = UnsafeNativeMethods.GetDC(NativeMethods.NullHandleRef); if (hDC != IntPtr.Zero) { logPixelsY = UnsafeNativeMethods.GetDeviceCaps(new HandleRef(null, hDC), NativeMethods.LOGPIXELSY); UnsafeNativeMethods.ReleaseDC(NativeMethods.NullHandleRef, new HandleRef(null, hDC)); } } return logPixelsY; } } public static void ResetLogPixelsY() { logPixelsY = -1; } ////// Wraps a given managed object, expected to be enabled for IDispatch interop, in a native one that /// trivially delegates the IDispatch calls. This ensures that cross-context calls on the managed object /// occur on the same thread (assumed to be in an STA), not on some random RPC worker thread. /// ////// CLR objects are thread-agile. But nearly all COM objects we use are STA-bound, and we also need /// our implementations of COM interfaces to be called on the thread on which their object was created, /// often because of interacting with core WPF objects that also have thread affinity. /// Getting a CLR object to "stick to the right thread" when called from another context (like cross-process) /// turns out to be incredibly hard. WinForms has solved the problem with StandardOleMarshalObject. /// Unfortunately, it wasn't designed to work in partial trust. And apart from that, it just doesn't /// seem to work cross-process, which is what we actually need for the WebOC hosting. /// There's also the ContextBoundObject family. A derived object could be made thread-bound. But this /// doesn't work for us either, because we get deadlocks. COM allows re-entrancy when "blocked" on an /// outgoing call from an STA, but ContextBoundObject apparently doesn't--it really blocks. /// ////// Critical because of SUC. /// Since wrapping a managed object in a native one that trivially delegates IDispatch calls is safe, /// a caller of this method can generally be marked SecurityTreatAsSafe. /// [SuppressUnmanagedCodeSecurity, SecurityCritical] [DllImport(ExternDll.PresentationHostDll, PreserveSig=false)] [return: MarshalAs(UnmanagedType.IDispatch)] internal static extern object CreateIDispatchSTAForwarder([MarshalAs(UnmanagedType.IDispatch)] object pDispatchDelegate); } } // 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
- ObjectViewQueryResultData.cs
- StandardOleMarshalObject.cs
- CustomAttributeBuilder.cs
- SafeRightsManagementQueryHandle.cs
- Bitmap.cs
- Base64Stream.cs
- SharedConnectionInfo.cs
- AuthStoreRoleProvider.cs
- InputMethodStateTypeInfo.cs
- EdmSchemaError.cs
- JumpList.cs
- VariableReference.cs
- ThreadInterruptedException.cs
- PackageRelationshipCollection.cs
- XmlC14NWriter.cs
- PermissionSet.cs
- PropertiesTab.cs
- BasicCommandTreeVisitor.cs
- SqlBuffer.cs
- EUCJPEncoding.cs
- FlowSwitch.cs
- ViewValidator.cs
- DataGridViewRowPostPaintEventArgs.cs
- BitmapVisualManager.cs
- sqlcontext.cs
- BitmapEncoder.cs
- DataGridColumnCollection.cs
- ImagingCache.cs
- ModelTreeEnumerator.cs
- Baml2006Reader.cs
- SocketManager.cs
- LinqToSqlWrapper.cs
- DataServiceExpressionVisitor.cs
- IResourceProvider.cs
- SettingsBindableAttribute.cs
- NetworkInterface.cs
- _PooledStream.cs
- ObfuscationAttribute.cs
- WindowsAltTab.cs
- MasterPageParser.cs
- SuppressMessageAttribute.cs
- MemberRelationshipService.cs
- Renderer.cs
- SystemColors.cs
- PassportPrincipal.cs
- HtmlButton.cs
- CodeCatchClauseCollection.cs
- SingleSelectRootGridEntry.cs
- FieldDescriptor.cs
- DynamicActionMessageFilter.cs
- ObjectManager.cs
- HttpListenerContext.cs
- SystemWebSectionGroup.cs
- ConstructorArgumentAttribute.cs
- BinaryOperationBinder.cs
- activationcontext.cs
- AuthorizationRuleCollection.cs
- ModulesEntry.cs
- IOException.cs
- MobileRedirect.cs
- MonitoringDescriptionAttribute.cs
- Logging.cs
- HtmlFormWrapper.cs
- CanonicalFontFamilyReference.cs
- SqlCommandAsyncResult.cs
- UserControl.cs
- Single.cs
- ProcessDesigner.cs
- LocalBuilder.cs
- ListViewItemSelectionChangedEvent.cs
- DataGridViewColumnEventArgs.cs
- AppDomainGrammarProxy.cs
- IProvider.cs
- EventMappingSettings.cs
- CompressedStack.cs
- UnaryOperationBinder.cs
- XamlTemplateSerializer.cs
- WebRequest.cs
- ScrollBarAutomationPeer.cs
- EntityException.cs
- HttpCachePolicyElement.cs
- WebServiceClientProxyGenerator.cs
- InputBinding.cs
- CssTextWriter.cs
- XmlTypeAttribute.cs
- PathFigureCollection.cs
- ClassicBorderDecorator.cs
- RoleManagerModule.cs
- GlyphRun.cs
- VisualTreeHelper.cs
- _Win32.cs
- NavigationPropertyAccessor.cs
- XPathBinder.cs
- MutableAssemblyCacheEntry.cs
- HostingEnvironment.cs
- EventMappingSettings.cs
- Item.cs
- NamedElement.cs
- Slider.cs
- XmlHierarchicalDataSourceView.cs