Code:
/ Dotnetfx_Vista_SP2 / Dotnetfx_Vista_SP2 / 8.0.50727.4016 / DEVDIV / depot / DevDiv / releases / Orcas / QFE / wpf / src / UIAutomation / UIAutomationClient / System / Windows / Automation / Condition.cs / 1 / Condition.cs
//---------------------------------------------------------------------------- // //// Copyright (C) Microsoft Corporation. All rights reserved. // // // // Description: // // History: // 10/14/2003 : BrendanM - Created // //--------------------------------------------------------------------------- // PRESHARP: In order to avoid generating warnings about unkown message numbers and unknown pragmas. #pragma warning disable 1634, 1691 using System; using MS.Internal.Automation; using System.Windows.Automation; using System.Runtime.InteropServices; using System.Runtime.CompilerServices; namespace System.Windows.Automation { // Internal Class that wraps the IntPtr to the Node internal sealed class SafeConditionMemoryHandle : SafeHandle { // Called by P/Invoke when returning SafeHandles // (Also used by UiaCoreApi to create invalid handles.) internal SafeConditionMemoryHandle() : base(IntPtr.Zero, true) { } // No need to provide a finalizer - SafeHandle's critical finalizer will // call ReleaseHandle for you. public override bool IsInvalid { get { return handle == IntPtr.Zero; } } override protected bool ReleaseHandle() { Marshal.FreeCoTaskMem(handle); return true; } // uiaCondition is one of the Uia condition structs - eg UiaCoreApi.UiaAndOrCondition internal static SafeConditionMemoryHandle AllocateConditionHandle(object uiaCondition) { // Allocate SafeHandle first to avoid failure later. SafeConditionMemoryHandle sh = new SafeConditionMemoryHandle(); int size = Marshal.SizeOf(uiaCondition); RuntimeHelpers.PrepareConstrainedRegions(); // ensures that the following finally block is atomic try { } finally { IntPtr mem = Marshal.AllocCoTaskMem(size); sh.SetHandle(mem); } Marshal.StructureToPtr(uiaCondition, sh.handle, false); return sh; } // used by And/Or conditions to allocate an array of pointers to other conditions internal static SafeConditionMemoryHandle AllocateConditionArrayHandle(Condition [] conditions) { // Allocate SafeHandle first to avoid failure later. SafeConditionMemoryHandle sh = new SafeConditionMemoryHandle(); int intPtrSize = Marshal.SizeOf(typeof(IntPtr)); RuntimeHelpers.PrepareConstrainedRegions(); // ensures that the following finally block is atomic try { } finally { IntPtr mem = Marshal.AllocCoTaskMem(conditions.Length * intPtrSize); sh.SetHandle(mem); } unsafe // Suppress "Exposing unsafe code thru public interface" UiaCoreApi is trusted #pragma warning suppress 56505 { IntPtr* pdata = (IntPtr*)sh.handle; for (int i = 0; i < conditions.Length; i++) { *pdata++ = conditions[i]._safeHandle.handle; } } return sh; } // Can't pass null into an API that takes a SafeHandle - so using this instead... internal static SafeConditionMemoryHandle NullHandle = new SafeConditionMemoryHandle(); } ////// Base type for conditions used by LogicalElementSearcher. /// #if (INTERNAL_COMPILE) internal abstract class Condition #else public abstract class Condition #endif { //----------------------------------------------------- // // Constructors // //----------------------------------------------------- #region Constructors // Internal ctor to prevent others from deriving from this class internal Condition() { } #endregion Constructors //------------------------------------------------------ // // Public readonly fields & constants // //----------------------------------------------------- #region Public readonly fields & constants ///Condition object that always evaluates to true public static readonly Condition TrueCondition = new BoolCondition(true); ///Condition object that always evaluates to false public static readonly Condition FalseCondition = new BoolCondition(false); #endregion Public readonly fields & constants //------------------------------------------------------ // // Internal Methods // //------------------------------------------------------ #region Internal Methods internal void SetMarshalData(object uiaCondition) { // Takes one of the interop UiaCondition classes (from UiaCoreApi.cs), and allocs // a SafeHandle with associated unmanaged memory - can then pass that to the UIA APIs. _safeHandle = SafeConditionMemoryHandle.AllocateConditionHandle(uiaCondition); } #endregion Internal Methods //----------------------------------------------------- // // Internal Fields // //------------------------------------------------------ #region Internal Fields internal SafeConditionMemoryHandle _safeHandle; #endregion Internal Fields //----------------------------------------------------- // // Nested Classes // //----------------------------------------------------- private class BoolCondition: Condition { internal BoolCondition(bool b) { SetMarshalData(new UiaCoreApi.UiaCondition(b ? UiaCoreApi.ConditionType.True : UiaCoreApi.ConditionType.False)); } } } } // File provided for Reference Use Only by Microsoft Corporation (c) 2007. // Copyright (c) Microsoft Corporation. All rights reserved. //---------------------------------------------------------------------------- // //// Copyright (C) Microsoft Corporation. All rights reserved. // // // // Description: // // History: // 10/14/2003 : BrendanM - Created // //--------------------------------------------------------------------------- // PRESHARP: In order to avoid generating warnings about unkown message numbers and unknown pragmas. #pragma warning disable 1634, 1691 using System; using MS.Internal.Automation; using System.Windows.Automation; using System.Runtime.InteropServices; using System.Runtime.CompilerServices; namespace System.Windows.Automation { // Internal Class that wraps the IntPtr to the Node internal sealed class SafeConditionMemoryHandle : SafeHandle { // Called by P/Invoke when returning SafeHandles // (Also used by UiaCoreApi to create invalid handles.) internal SafeConditionMemoryHandle() : base(IntPtr.Zero, true) { } // No need to provide a finalizer - SafeHandle's critical finalizer will // call ReleaseHandle for you. public override bool IsInvalid { get { return handle == IntPtr.Zero; } } override protected bool ReleaseHandle() { Marshal.FreeCoTaskMem(handle); return true; } // uiaCondition is one of the Uia condition structs - eg UiaCoreApi.UiaAndOrCondition internal static SafeConditionMemoryHandle AllocateConditionHandle(object uiaCondition) { // Allocate SafeHandle first to avoid failure later. SafeConditionMemoryHandle sh = new SafeConditionMemoryHandle(); int size = Marshal.SizeOf(uiaCondition); RuntimeHelpers.PrepareConstrainedRegions(); // ensures that the following finally block is atomic try { } finally { IntPtr mem = Marshal.AllocCoTaskMem(size); sh.SetHandle(mem); } Marshal.StructureToPtr(uiaCondition, sh.handle, false); return sh; } // used by And/Or conditions to allocate an array of pointers to other conditions internal static SafeConditionMemoryHandle AllocateConditionArrayHandle(Condition [] conditions) { // Allocate SafeHandle first to avoid failure later. SafeConditionMemoryHandle sh = new SafeConditionMemoryHandle(); int intPtrSize = Marshal.SizeOf(typeof(IntPtr)); RuntimeHelpers.PrepareConstrainedRegions(); // ensures that the following finally block is atomic try { } finally { IntPtr mem = Marshal.AllocCoTaskMem(conditions.Length * intPtrSize); sh.SetHandle(mem); } unsafe // Suppress "Exposing unsafe code thru public interface" UiaCoreApi is trusted #pragma warning suppress 56505 { IntPtr* pdata = (IntPtr*)sh.handle; for (int i = 0; i < conditions.Length; i++) { *pdata++ = conditions[i]._safeHandle.handle; } } return sh; } // Can't pass null into an API that takes a SafeHandle - so using this instead... internal static SafeConditionMemoryHandle NullHandle = new SafeConditionMemoryHandle(); } ////// Base type for conditions used by LogicalElementSearcher. /// #if (INTERNAL_COMPILE) internal abstract class Condition #else public abstract class Condition #endif { //----------------------------------------------------- // // Constructors // //----------------------------------------------------- #region Constructors // Internal ctor to prevent others from deriving from this class internal Condition() { } #endregion Constructors //------------------------------------------------------ // // Public readonly fields & constants // //----------------------------------------------------- #region Public readonly fields & constants ///Condition object that always evaluates to true public static readonly Condition TrueCondition = new BoolCondition(true); ///Condition object that always evaluates to false public static readonly Condition FalseCondition = new BoolCondition(false); #endregion Public readonly fields & constants //------------------------------------------------------ // // Internal Methods // //------------------------------------------------------ #region Internal Methods internal void SetMarshalData(object uiaCondition) { // Takes one of the interop UiaCondition classes (from UiaCoreApi.cs), and allocs // a SafeHandle with associated unmanaged memory - can then pass that to the UIA APIs. _safeHandle = SafeConditionMemoryHandle.AllocateConditionHandle(uiaCondition); } #endregion Internal Methods //----------------------------------------------------- // // Internal Fields // //------------------------------------------------------ #region Internal Fields internal SafeConditionMemoryHandle _safeHandle; #endregion Internal Fields //----------------------------------------------------- // // Nested Classes // //----------------------------------------------------- private class BoolCondition: Condition { internal BoolCondition(bool b) { SetMarshalData(new UiaCoreApi.UiaCondition(b ? UiaCoreApi.ConditionType.True : UiaCoreApi.ConditionType.False)); } } } } // 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
- TogglePattern.cs
- SafeSecurityHandles.cs
- MediaEntryAttribute.cs
- UTF8Encoding.cs
- RadioButtonPopupAdapter.cs
- SqlNode.cs
- XmlValidatingReader.cs
- CodeEventReferenceExpression.cs
- IArgumentProvider.cs
- TypedRowHandler.cs
- XmlTextReader.cs
- ExpressionNormalizer.cs
- DataRelationPropertyDescriptor.cs
- SizeAnimationClockResource.cs
- ProfileEventArgs.cs
- MonitorWrapper.cs
- BitmapSizeOptions.cs
- DragDrop.cs
- ThrowHelper.cs
- SineEase.cs
- CannotUnloadAppDomainException.cs
- SqlBuilder.cs
- ChunkedMemoryStream.cs
- XmlEntityReference.cs
- Misc.cs
- CodeLabeledStatement.cs
- ThemeDictionaryExtension.cs
- FieldNameLookup.cs
- DataTableReaderListener.cs
- HtmlElement.cs
- BaseComponentEditor.cs
- _NegoStream.cs
- MaskedTextProvider.cs
- EmptyQuery.cs
- RelationshipEndCollection.cs
- figurelength.cs
- XmlnsDefinitionAttribute.cs
- RecordManager.cs
- ProxyHelper.cs
- Window.cs
- MailAddressParser.cs
- HtmlLink.cs
- WorkflowPersistenceContext.cs
- PageThemeCodeDomTreeGenerator.cs
- StretchValidation.cs
- QueryComponents.cs
- TextParentUndoUnit.cs
- SendSecurityHeaderElementContainer.cs
- Image.cs
- TextEditorCharacters.cs
- StandardBindingCollectionElement.cs
- WebBrowserPermission.cs
- NoPersistHandle.cs
- ToolStripSeparator.cs
- PerformanceCountersElement.cs
- EventWaitHandle.cs
- AbstractSvcMapFileLoader.cs
- WinEventQueueItem.cs
- Stroke.cs
- RegistrySecurity.cs
- OracleFactory.cs
- XmlBindingWorker.cs
- BindingExpression.cs
- Visual3D.cs
- HasActivatableWorkflowEvent.cs
- TemplateManager.cs
- ToolboxItemFilterAttribute.cs
- ViewBox.cs
- InputBuffer.cs
- SqlVersion.cs
- DetailsViewRowCollection.cs
- CodeNamespaceImportCollection.cs
- ConfigurationValidatorAttribute.cs
- AssemblyBuilderData.cs
- HMACSHA256.cs
- DataControlButton.cs
- FileVersion.cs
- ToolStripTextBox.cs
- SignatureHelper.cs
- DoubleConverter.cs
- MatchAllMessageFilter.cs
- UIElementAutomationPeer.cs
- ParameterBuilder.cs
- OleDbSchemaGuid.cs
- AssertSection.cs
- EdgeModeValidation.cs
- WindowsButton.cs
- AspNetHostingPermission.cs
- SecurityContext.cs
- NativeMethods.cs
- XpsS0ValidatingLoader.cs
- CollectionBuilder.cs
- ComponentResourceKey.cs
- SystemColors.cs
- DataMemberListEditor.cs
- XPathScanner.cs
- BamlRecordHelper.cs
- XmlNotation.cs
- SoapIgnoreAttribute.cs
- ObjectHandle.cs