Code:
/ 4.0 / 4.0 / DEVDIV_TFS / Dev10 / Releases / RTMRel / wpf / src / UIAutomation / UIAutomationClient / System / Windows / Automation / Condition.cs / 1305600 / 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
- CodeTypeParameterCollection.cs
- XmlEventCache.cs
- RuntimeIdentifierPropertyAttribute.cs
- XmlName.cs
- RadioButtonStandardAdapter.cs
- WindowsGraphics2.cs
- QilInvokeLateBound.cs
- GetPageNumberCompletedEventArgs.cs
- LinearKeyFrames.cs
- GridViewColumnCollection.cs
- _UriTypeConverter.cs
- TraceLevelStore.cs
- ValidatedControlConverter.cs
- DataReaderContainer.cs
- Int32.cs
- NullableIntSumAggregationOperator.cs
- StreamMarshaler.cs
- CodeMemberField.cs
- FixedLineResult.cs
- ColumnPropertiesGroup.cs
- CuspData.cs
- XsltCompileContext.cs
- ElementHostPropertyMap.cs
- ObjectDataSourceView.cs
- CodeTypeDelegate.cs
- DbSetClause.cs
- RuleInfoComparer.cs
- CanonicalXml.cs
- ActiveXHelper.cs
- WebPart.cs
- ProtectedConfiguration.cs
- Debug.cs
- ContextBase.cs
- TextProperties.cs
- CopyCodeAction.cs
- TypeConverterAttribute.cs
- OleDbTransaction.cs
- ToolboxItemCollection.cs
- HealthMonitoringSectionHelper.cs
- SqlConnectionPoolGroupProviderInfo.cs
- SqlProfileProvider.cs
- SelectionEditingBehavior.cs
- BooleanToVisibilityConverter.cs
- WorkflowRequestContext.cs
- SmtpSection.cs
- ResourceDisplayNameAttribute.cs
- CultureNotFoundException.cs
- WindowsStartMenu.cs
- HandleCollector.cs
- PrinterUnitConvert.cs
- Base64Decoder.cs
- HandlerBase.cs
- log.cs
- PtsPage.cs
- ProfileProvider.cs
- SqlSupersetValidator.cs
- SrgsDocumentParser.cs
- ArgumentNullException.cs
- GeometryDrawing.cs
- FlatButtonAppearance.cs
- PolyBezierSegmentFigureLogic.cs
- SqlLiftIndependentRowExpressions.cs
- TypeConverterHelper.cs
- UpDownBaseDesigner.cs
- XmlBoundElement.cs
- KerberosSecurityTokenAuthenticator.cs
- DataSourceCache.cs
- Vector3DValueSerializer.cs
- ButtonFieldBase.cs
- ResourceProviderFactory.cs
- DataGridViewBindingCompleteEventArgs.cs
- XPathAncestorQuery.cs
- IERequestCache.cs
- SqlDuplicator.cs
- FieldTemplateUserControl.cs
- SelectionWordBreaker.cs
- GroupItemAutomationPeer.cs
- AnnotationMap.cs
- Faults.cs
- MissingMethodException.cs
- DataTableReaderListener.cs
- rsa.cs
- DataServiceQueryProvider.cs
- ViewGenerator.cs
- SQLInt16Storage.cs
- UrlPropertyAttribute.cs
- DateTimeOffset.cs
- SystemGatewayIPAddressInformation.cs
- DefaultPrintController.cs
- RegularExpressionValidator.cs
- TimeSpanConverter.cs
- CultureTable.cs
- ConfigsHelper.cs
- DocumentPageViewAutomationPeer.cs
- PerformanceCounterCategory.cs
- Bits.cs
- CodeSubDirectory.cs
- CodeObject.cs
- _ConnectStream.cs
- DataGridColumnHeadersPresenterAutomationPeer.cs