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
- RowUpdatedEventArgs.cs
- CorePropertiesFilter.cs
- Label.cs
- COM2ComponentEditor.cs
- RegisteredScript.cs
- DataControlFieldCollection.cs
- TextRangeAdaptor.cs
- ListViewItem.cs
- SessionStateSection.cs
- XmlnsCache.cs
- ContextMenuStrip.cs
- coordinatorfactory.cs
- NonParentingControl.cs
- CopyAttributesAction.cs
- DefaultValueTypeConverter.cs
- SettingsProperty.cs
- ScheduleChanges.cs
- IPPacketInformation.cs
- EmptyReadOnlyDictionaryInternal.cs
- PixelShader.cs
- OdbcConnectionFactory.cs
- TemplateField.cs
- RadioButton.cs
- QilBinary.cs
- XamlSerializerUtil.cs
- WebUtil.cs
- Parallel.cs
- StringDictionary.cs
- ConfigurationLocationCollection.cs
- RuntimeIdentifierPropertyAttribute.cs
- SQLInt16Storage.cs
- SQLMoneyStorage.cs
- EdmProperty.cs
- DataGridViewCellConverter.cs
- UserControl.cs
- Application.cs
- CompilationLock.cs
- XmlDataSource.cs
- SrgsText.cs
- InkSerializer.cs
- HttpWriter.cs
- CallTemplateAction.cs
- PinnedBufferMemoryStream.cs
- BindingContext.cs
- WrappedIUnknown.cs
- TitleStyle.cs
- ObjectQueryProvider.cs
- AffineTransform3D.cs
- TagNameToTypeMapper.cs
- ToolStripControlHost.cs
- ClientReliableChannelBinder.cs
- SerializerProvider.cs
- PortCache.cs
- Slider.cs
- LoginAutoFormat.cs
- dtdvalidator.cs
- WebServiceFaultDesigner.cs
- CatalogZone.cs
- WeakEventTable.cs
- TextReader.cs
- Trace.cs
- _AuthenticationState.cs
- metadatamappinghashervisitor.hashsourcebuilder.cs
- CompiledAction.cs
- ModelUIElement3D.cs
- Control.cs
- PagedDataSource.cs
- SoapFormatExtensions.cs
- InlineObject.cs
- DurationConverter.cs
- TemplateControlBuildProvider.cs
- Match.cs
- MultiAsyncResult.cs
- AttributeEmitter.cs
- ComponentConverter.cs
- SystemIPAddressInformation.cs
- NativeWindow.cs
- State.cs
- TextBreakpoint.cs
- XamlTemplateSerializer.cs
- BeginGetFileNameFromUserRequest.cs
- StrongNamePublicKeyBlob.cs
- PageEventArgs.cs
- StateBag.cs
- HtmlInputText.cs
- CodeGen.cs
- Types.cs
- OracleMonthSpan.cs
- MethodImplAttribute.cs
- SymDocumentType.cs
- ClientSettings.cs
- Pkcs7Recipient.cs
- DecimalStorage.cs
- MenuItem.cs
- RewritingValidator.cs
- ModelItemCollectionImpl.cs
- ReferencedAssembly.cs
- ObjectStorage.cs
- ConstraintConverter.cs
- SymDocumentType.cs