Code:
/ Net / Net / 3.5.50727.3053 / DEVDIV / depot / DevDiv / releases / Orcas / SP / wpf / src / UIAutomation / UIAutomationClient / MS / Internal / Automation / UiaCoreApi.cs / 1 / UiaCoreApi.cs
//----------------------------------------------------------------------------
//
//
// Copyright (C) Microsoft Corporation. All rights reserved.
//
//
//
// Description: Imports from unmanaged UiaCore DLL
//
// History:
// 06/02/2003 : BrendanM Ported to WCP
//
//---------------------------------------------------------------------------
// PRESHARP: In order to avoid generating warnings about unkown message numbers and unknown pragmas.
#pragma warning disable 1634, 1691
using System;
using System.Security;
using System.Runtime.InteropServices;
using System.Windows;
using System.Windows.Automation;
using System.Windows.Automation.Text;
using System.Windows.Automation.Provider;
using System.Diagnostics;
using MS.Win32;
using Microsoft.Internal;
namespace MS.Internal.Automation
{
// [SuppressUnmanagedCodeSecurity] is not used here, since currently
// this is a client-only DLL. After we split into client vs provider,
// the provider assembly will need that attribute on its own APIs.
internal static class UiaCoreApi
{
//-----------------------------------------------------
//
// Conditions enums and structs
//
//-----------------------------------------------------
#region Conditions
internal enum ConditionType
{
True = 0,
False = 1,
Property = 2,
And = 3,
Or = 4,
Not = 5
}
[StructLayout(LayoutKind.Sequential)]
internal struct UiaCondition
{
ConditionType _conditionType;
internal UiaCondition(ConditionType conditionType)
{
_conditionType = conditionType;
}
}
[StructLayout(LayoutKind.Sequential)]
internal struct UiaPropertyCondition
{
ConditionType _conditionType;
int _propertyId;
[MarshalAs(UnmanagedType.Struct)] // UnmanagedType.Struct == use VARIANT
object _value;
PropertyConditionFlags _flags;
internal UiaPropertyCondition(int propertyId, object value, PropertyConditionFlags flags)
{
_conditionType = ConditionType.Property;
_propertyId = propertyId;
_value = value;
_flags = flags;
}
}
[StructLayout(LayoutKind.Sequential)]
internal struct UiaAndOrCondition
{
ConditionType _conditionType;
public IntPtr _conditions; // ptr to array-of-ptrs to conditions
public int _conditionCount;
internal UiaAndOrCondition(ConditionType conditionType, IntPtr conditions, int conditionCount)
{
_conditionType = conditionType;
_conditions = conditions;
_conditionCount = conditionCount;
}
}
[StructLayout(LayoutKind.Sequential)]
internal struct UiaNotCondition
{
ConditionType _conditionType;
public IntPtr _condition;
internal UiaNotCondition(IntPtr condition)
{
_conditionType = ConditionType.Not;
_condition = condition;
}
}
#endregion Conditions
//------------------------------------------------------
//
// CacheRequest/CacheResponse
//
//-----------------------------------------------------
#region CacheRequest/Response
[StructLayout(LayoutKind.Sequential)]
internal class UiaCacheRequest
{
internal Condition _condition;
internal TreeScope _scope;
internal IntPtr _pProperties;
internal int _propertyCount;
internal IntPtr _pPatterns;
internal int _patternCount;
internal AutomationElementMode _automationElementMode;
// The following fields are not used by unmanaged code...
private AutomationProperty[] _properties;
private AutomationPattern[] _patterns;
public TreeScope TreeScope { get { return _scope; } }
public AutomationElementMode AutomationElementMode { get { return _automationElementMode; } }
public AutomationProperty [] Properties { get { return _properties; } }
public AutomationPattern [] Patterns { get { return _patterns; } }
internal UiaCacheRequest(Condition condition,
TreeScope scope,
AutomationProperty[] properties,
AutomationPattern[] patterns,
AutomationElementMode automationElementMode)
{
_condition = condition;
_scope = scope;
_automationElementMode = automationElementMode;
_properties = properties;
_patterns = patterns;
IntPtr dataStart = Marshal.AllocCoTaskMem((properties.Length + patterns.Length) * sizeof(int));
unsafe
{
int* pdata = (int*)dataStart;
_pProperties = (IntPtr)pdata;
_propertyCount = properties.Length;
for (int i = 0; i < properties.Length; i++)
{
*pdata++ = properties[i].Id;
}
_pPatterns = (IntPtr)pdata;
_patternCount = patterns.Length;
for (int i = 0; i < patterns.Length; i++)
{
*pdata++ = patterns[i].Id;
}
}
}
~UiaCacheRequest()
{
if (_pProperties != IntPtr.Zero)
{
// Since _pProperties points to the start of one allocation block
// that is used for both properties and patterns, this covers both...
Marshal.FreeCoTaskMem(_pProperties);
}
}
}
// This is not used in any of the DLL entry points - they have
// separate our params for the data and strings - but is used
// to hand back the data+strings in one unit to the ClientAPI caller.
internal struct UiaCacheResponse
{
private object[,] _requestedData;
private string _treeStructure;
// Note - this takes ownership of the requestedData array, and modifies it in-place
// (replacing VT_I4/VT_I8 node/pattern references with SafeHandles)
internal UiaCacheResponse(object[,] requestedData, string treeStructure, UiaCacheRequest request)
{
_requestedData = requestedData;
_treeStructure = treeStructure;
ConvertFromComTypesToClrTypes(_requestedData, request);
}
internal object[,] RequestedData { get { return _requestedData; } }
internal string TreeStructure { get { return _treeStructure; } }
private static void ConvertFromComTypesToClrTypes(object[,] data, UiaCacheRequest request)
{
// Handle empty case...
if (data == null)
{
return;
}
// Go through the data, and convert any references to an appropriate SafeHandle type -
// this ensures that they get released properly during cleanup.
//
// Note that there is a time window between getting the array back and having all the handles
// converted where a 'rude unload' (eg. by a host such as Yukon) could cause a handle leak,
// would need to change the underlying API to avoid this. May consider that in Beta2,
// but for Beta1, this does the job.
for(int objIndex = 0 ; objIndex < data.GetLength(0) ; objIndex++ )
{
// Handle position 0, which can be a hnode...
if (request._automationElementMode == AutomationElementMode.Full)
{
object val = data[objIndex, 0];
if (val != null)
{
SafeNodeHandle safeHandle = UiaHUiaNodeFromVariant(val);
data[objIndex, 0] = safeHandle;
}
}
// Handle properties - these can be other nodes, or in some cases, arrays of nodes
// Use the corresponding object converter from Schema to do the work here (these convert
// from int to enum, int[] to Rect, etc.)
for (int propertyIndex = 0; propertyIndex < request.Properties.Length; propertyIndex++)
{
// Convert property from the VARIANT in the array to a more CLR-friendly
// value - eg. enums are in the array as ints, so need to cast before
// returning.
object val = data[objIndex, 1 + propertyIndex];
if (val == null || val == AutomationElement.NotSupported || UiaCoreApi.IsErrorMarker(val, false/*throwException*/))
continue;
AutomationPropertyInfo pi;
if (Schema.GetPropertyInfo(request.Properties[propertyIndex], out pi))
{
if (pi.ObjectConverter != null)
{
data[objIndex, 1 + propertyIndex] = pi.ObjectConverter(val);
}
}
else
{
Debug.Assert(false, "unsupported property should not have made it this far");
}
}
// Handle patterns
int patternBaseIndex = 1 + request.Properties.Length;
for (int patternIndex = 0; patternIndex < request.Patterns.Length; patternIndex++)
{
object val = data[objIndex, patternBaseIndex + patternIndex];
if (val != null)
{
// Just wrap patterns to a SafeHandle, not a full pattern object, since patten
// object reqire a AutomationElement reference.
SafePatternHandle hpatternobj = UiaHPatternObjectFromVariant(val);
data[objIndex, patternBaseIndex + patternIndex] = hpatternobj;
}
}
}
}
}
// Subset of UiaCacheRequest for marshalling...
[StructLayout(LayoutKind.Sequential)]
private class UiaMiniCacheRequest
{
private IntPtr _pCondition;
private TreeScope _scope;
private IntPtr _pProperties;
private int _propertyCount;
private IntPtr _pPatterns;
private int _patternCount;
private AutomationElementMode _automationElementMode;
internal UiaMiniCacheRequest(UiaCacheRequest cr, IntPtr conditionPtr)
{
_pCondition = conditionPtr;
_scope = cr._scope;
_pProperties = cr._pProperties;
_propertyCount = cr._propertyCount;
_pPatterns = cr._pPatterns;
_patternCount = cr._patternCount;
_automationElementMode = cr._automationElementMode;
}
}
#endregion CacheRequest/Response
//------------------------------------------------------
//
// Other API types
//
//------------------------------------------------------
#region Other
[StructLayout(LayoutKind.Sequential)]
internal struct UiaFindParams
{
internal int MaxDepth;
internal bool FindFirst;
internal bool ExcludeRoot;
internal IntPtr pFindCondition;
};
internal enum AutomationIdType
{
Property,
Pattern,
Event,
ControlType,
TextAttribute
}
internal enum NormalizeState
{
None,
View,
Custom
}
internal const int UIA_E_ELEMENTNOTENABLED = unchecked((int)0x80040200);
internal const int UIA_E_ELEMENTNOTAVAILABLE = unchecked((int)0x80040201);
internal const int UIA_E_NOCLICKABLEPOINT = unchecked((int)0x80040202);
internal const int UIA_E_PROXYASSEMBLYNOTLOADED = unchecked((int)0x80040203);
internal delegate void UiaEventCallback(IntPtr args,
[MarshalAs(UnmanagedType.SafeArray, SafeArraySubType = VarEnum.VT_VARIANT)] object[,] pRequestedData,
[MarshalAs(UnmanagedType.BStr)] string pTreeStructure);
internal const int UiaHwndRuntimeIdBase = 42;
#endregion Other
//-----------------------------------------------------
//
// Internal Methods
//
//------------------------------------------------------
#region Internal Methods
//
// Client-side methods...
//
#region Client methods
internal static UiaCacheResponse UiaNodeFromPoint(double x, double y, UiaCacheRequest request)
{
string treeStructure;
object[,] requestedData;
// Note on marshalling of CacheRequest: The UiaCacheRequest class contains extra fields that we use in managed code
// (eg, managed versions of the arrays) that we can't marshal, so we use another class, UiaMiniCacheRequest, that contains
// just the interop stuff. This needs to contain a pointer to the condition; but since we can't embed SafeHandles in structs,
// it needs to be an IntPtr - hence the use of DangerousGetHandle here. We then use KeepAlive to ensure the condition
// (and its unmanaged alloced memory) stays around till we're done. This is necessary because we're passing it as an IntPtr
// within a struct, which is invisible to GC.
// Note that Condition isn't vulnerable to IntPtr/handle recycling issues, since Condition is immutable and is tied to the
// lifetime of the underlying object (you'd need to have a Close/Dispose equivalent in order to be vulnerable to recycling;
// without one, your handle can't become stale.)
UiaMiniCacheRequest miniCR = new UiaMiniCacheRequest(request, request._condition._safeHandle.DangerousGetHandle());
CheckError(RawUiaNodeFromPoint(x, y, miniCR, out requestedData, out treeStructure));
GC.KeepAlive(request._condition); // keep condition (and associated unmanaged memory) alive during call
return new UiaCacheResponse(requestedData, treeStructure, request);
}
internal static UiaCacheResponse UiaNodeFromFocus(UiaCacheRequest request)
{
string treeStructure;
object[,] requestedData;
UiaMiniCacheRequest miniCR = new UiaMiniCacheRequest(request, request._condition._safeHandle.DangerousGetHandle());
CheckError(RawUiaNodeFromFocus(miniCR, out requestedData, out treeStructure));
GC.KeepAlive(request._condition); // keep condition (and associated unmanaged memory) alive during call
return new UiaCacheResponse(requestedData, treeStructure, request);
}
internal static UiaCacheResponse UiaGetUpdatedCache(SafeNodeHandle hnode, UiaCacheRequest request, NormalizeState normalize, Condition customCondition)
{
string treeStructure;
object[,] requestedData;
UiaMiniCacheRequest miniCR = new UiaMiniCacheRequest(request, request._condition._safeHandle.DangerousGetHandle());
CheckError(RawUiaGetUpdatedCache(hnode, miniCR, normalize, customCondition == null ? SafeConditionMemoryHandle.NullHandle : customCondition._safeHandle, out requestedData, out treeStructure));
GC.KeepAlive(request._condition); // keep condition (and associated unmanaged memory) alive during call
return new UiaCacheResponse(requestedData, treeStructure, request);
}
internal static void UiaGetPropertyValue(SafeNodeHandle hnode, int propertyId, out object value)
{
CheckError(RawUiaGetPropertyValue(hnode, propertyId, out value));
}
internal static SafePatternHandle UiaGetPatternProvider(SafeNodeHandle hnode, int patternId)
{
SafePatternHandle hobj;
CheckError(RawUiaGetPatternProvider(hnode, patternId, out hobj));
// Whidbey RTM SafeHandle/PInvoke bug workaround - SafeHandles on 64 can come back
// as null, should be non-null but Invalid. This fixes up to non-null.
if (hobj == null)
{
hobj = new SafePatternHandle();
}
return hobj;
}
internal static int[] UiaGetRuntimeId(SafeNodeHandle hnode)
{
int[] runtimeId;
CheckError(RawUiaGetRuntimeId(hnode, out runtimeId));
return runtimeId;
}
internal static void UiaSetFocus(SafeNodeHandle hnode)
{
CheckError(RawUiaSetFocus(hnode));
}
internal static UiaCacheResponse UiaNavigate(SafeNodeHandle hnode, NavigateDirection direction, Condition condition, UiaCacheRequest request)
{
string treeStructure;
object[,] requestedData;
UiaMiniCacheRequest miniCR = new UiaMiniCacheRequest(request, request._condition._safeHandle.DangerousGetHandle());
CheckError(RawUiaNavigate(hnode, direction, condition._safeHandle, miniCR, out requestedData, out treeStructure));
GC.KeepAlive(request._condition); // keep condition (and associated unmanaged memory) alive during call
return new UiaCacheResponse(requestedData, treeStructure, request);
}
internal static UiaCacheResponse[] UiaFind(SafeNodeHandle hnode, UiaFindParams findParams, Condition findCondition, UiaCacheRequest request)
{
// The native API for this returns separate arrays of data and tree structure strings,
// one element each for each found element. After it returns, we need to merge corresponding
// entries to give a single array of UiaCacheResponse objects...
object[,] requestedData;
int[] offsets;
string[] treeStructures;
UiaMiniCacheRequest miniCR = new UiaMiniCacheRequest(request, request._condition._safeHandle.DangerousGetHandle());
findParams.pFindCondition = findCondition._safeHandle.DangerousGetHandle();
CheckError(RawUiaFind(hnode, ref findParams, miniCR, out requestedData, out offsets, out treeStructures));
GC.KeepAlive(request._condition); // keep condition (and associated unmanaged memory) alive during call
GC.KeepAlive(findCondition);
if (requestedData == null)
{
Debug.Assert(offsets == null && treeStructures == null, "if nothin found, all out params shoud be null");
return new UiaCacheResponse[] {}; // Return empty cacheresponse, not null.
}
Debug.Assert(offsets.Length == treeStructures.Length);
// Now do the actual merge...
UiaCacheResponse[] responses = new UiaCacheResponse[treeStructures.Length];
int properties = requestedData.GetLength(1);
for (int i = 0; i < treeStructures.Length; i++)
{
int startRow = offsets[i];
int endRow = i < treeStructures.Length - 1 ? offsets[i + 1] : requestedData.GetLength(0);
int elements = endRow - startRow;
object[,] elementData = new object[elements, properties];
for (int e = 0; e < elements; e++)
for (int p = 0; p < properties; p++)
elementData[e, p] = requestedData[e + startRow, p];
responses[i] = new UiaCacheResponse(elementData, treeStructures[i], request);
}
return responses;
}
internal static SafeNodeHandle UiaNodeFromHandle(IntPtr hwnd)
{
SafeNodeHandle hnode;
CheckError(RawUiaNodeFromHandle(hwnd, out hnode));
// Whidbey RTM SafeHandle/PInvoke bug workaround - SafeHandles on 64 can come back
// as null, should be non-null but Invalid. This fixes up to non-null.
if (hnode == null)
{
hnode = new SafeNodeHandle();
}
return hnode;
}
internal static SafeNodeHandle UiaGetRootNode()
{
SafeNodeHandle hnode;
CheckError(RawUiaGetRootNode(out hnode));
// Whidbey RTM SafeHandle/PInvoke bug workaround - SafeHandles on 64 can come back
// as null, should be non-null but Invalid. This fixes up to non-null.
if (hnode == null)
{
hnode = new SafeNodeHandle();
}
return hnode;
}
internal static SafeNodeHandle UiaNodeFromProvider(IRawElementProviderSimple provider)
{
SafeNodeHandle hnode;
CheckError(RawUiaNodeFromProvider(provider, out hnode));
// Whidbey RTM SafeHandle/PInvoke bug workaround - SafeHandles on 64 can come back
// as null, should be non-null but Invalid. This fixes up to non-null.
if (hnode == null)
{
hnode = new SafeNodeHandle();
}
return hnode;
}
internal static SafeNodeHandle UiaHUiaNodeFromVariant(object var)
{
SafeNodeHandle hnode;
CheckError(RawUiaHUiaNodeFromVariant(ref var, out hnode));
// Whidbey RTM SafeHandle/PInvoke bug workaround - SafeHandles on 64 can come back
// as null, should be non-null but Invalid. This fixes up to non-null.
if (hnode == null)
{
hnode = new SafeNodeHandle();
}
return hnode;
}
internal static SafePatternHandle UiaHPatternObjectFromVariant(object var)
{
SafePatternHandle hobj;
CheckError(RawUiaHPatternObjectFromVariant(ref var, out hobj));
// Whidbey RTM SafeHandle/PInvoke bug workaround - SafeHandles on 64 can come back
// as null, should be non-null but Invalid. This fixes up to non-null.
if (hobj == null)
{
hobj = new SafePatternHandle();
}
return hobj;
}
internal static SafeTextRangeHandle UiaHTextRangeFromVariant(object var)
{
SafeTextRangeHandle hobj;
CheckError(RawUiaHTextRangeFromVariant(ref var, out hobj));
// Whidbey RTM SafeHandle/PInvoke bug workaround - SafeHandles on 64 can come back
// as null, should be non-null but Invalid. This fixes up to non-null.
if (hobj == null)
{
hobj = new SafeTextRangeHandle();
}
return hobj;
}
[DllImport(DllImport.UIAutomationCore, EntryPoint = "UiaHasServerSideProvider", CharSet = CharSet.Unicode)]
internal static extern bool UiaHasServerSideProvider(IntPtr hwnd);
///
/// Critical: This code calls into the unmanaged UIAutomationCore.dll
/// TreatAsSafe: Cleanup code for releasing a resource. Sometimes a handle may be obtained by asserting full trust,
/// but then we go back to partial trust. Releasing the resource should never generate a security exception.
///
[SecurityCritical,SecurityTreatAsSafe]
internal static bool UiaNodeRelease(IntPtr hnode)
{
return RawUiaNodeRelease( hnode );
}
///
/// Critical: This code calls into the unmanaged UIAutomationCore.dll
/// TreatAsSafe: Cleanup code for releasing a resource. Sometimes a handle may be obtained by asserting full trust,
/// but then we go back to partial trust. Releasing the resource should never generate a security exception.
///
[SecurityCritical,SecurityTreatAsSafe]
internal static bool UiaPatternRelease(IntPtr hobj)
{
return RawUiaPatternRelease( hobj );
}
///
/// Critical: This code calls into the unmanaged UIAutomationCore.dll
/// TreatAsSafe: Cleanup code for releasing a resource. Sometimes a handle may be obtained by asserting full trust,
/// but then we go back to partial trust. Releasing the resource should never generate a security exception.
///
[SecurityCritical,SecurityTreatAsSafe]
internal static bool UiaTextRangeRelease(IntPtr hobj)
{
return RawUiaTextRangeRelease( hobj );
}
#endregion Client methods
//
// Event methods (client only)
//
#region Event methods
internal static SafeEventHandle UiaAddEvent(SafeNodeHandle hnode, int eventId, UiaEventCallback callback, TreeScope scope, int[] properties, UiaCacheRequest request)
{
SafeEventHandle hevent;
UiaMiniCacheRequest miniCR = new UiaMiniCacheRequest(request, request._condition._safeHandle.DangerousGetHandle());
CheckError(RawUiaAddEvent(hnode, eventId, callback, scope, properties, properties == null ? 0 : properties.Length, miniCR, out hevent));
GC.KeepAlive(request._condition); // keep condition (and associated unmanaged memory) alive during call
return hevent;
}
internal static void UiaRemoveEvent(IntPtr hevent)
{
CheckError(RawUiaRemoveEvent(hevent));
}
internal static void UiaEventAddWindow(SafeEventHandle hevent, IntPtr hwnd)
{
CheckError(RawUiaEventAddWindow(hevent, hwnd));
}
internal static void UiaEventRemoveWindow(SafeEventHandle hevent, IntPtr hwnd)
{
CheckError(RawUiaEventRemoveWindow(hevent, hwnd));
}
#endregion Event methods
//
// EventArgs translation
//
#region EventArgs translation
// Build an int[] from an array of ints in memory at the specified address
// Used to pull runtimeIDs from C/interop structs
private static int[] ArrayFromIntPtr(IntPtr pInts, int cInts)
{
if (pInts == IntPtr.Zero)
return null;
int[] array = new int[cInts];
unsafe
{
for (int i = 0; i < cInts; i++)
{
array[i] = *(((int*)pInts) + i);
}
}
return array;
}
// UiaCore calls the delegate directly, with an IntPtr for the eventArgs,
// so the managed callback has to use this to parse those unmanaged args
// into something more managable.
internal static AutomationEventArgs GetUiaEventArgs(IntPtr argsAddr)
{
UiaEventArgs args = (UiaEventArgs)Marshal.PtrToStructure(argsAddr, typeof(UiaEventArgs));
AutomationEvent eventId = AutomationEvent.LookupById(args._eventId);
if (eventId == null)
{
Debug.Assert(false, "Got unknown eventId from core: " + args._eventId);
return null;
}
switch (args._type)
{
case EventArgsType.Simple:
{
return new AutomationEventArgs(eventId);
}
case EventArgsType.PropertyChanged:
{
UiaPropertyChangedEventArgs pcargs = (UiaPropertyChangedEventArgs)Marshal.PtrToStructure(argsAddr, typeof(UiaPropertyChangedEventArgs));
AutomationProperty propertyId = AutomationProperty.LookupById(pcargs._propertyId);
if (propertyId == null)
{
Debug.Assert(false, "Got unknown propertyId from core: " + pcargs._propertyId);
return null;
}
return new AutomationPropertyChangedEventArgs(propertyId, pcargs._oldValue, pcargs._newValue);
}
case EventArgsType.StructureChanged:
{
UiaStructureChangedEventArgs scargs = (UiaStructureChangedEventArgs)Marshal.PtrToStructure(argsAddr, typeof(UiaStructureChangedEventArgs));
int[] runtimeId = ArrayFromIntPtr(scargs._pRuntimeId, scargs._cRuntimeIdLen);
return new StructureChangedEventArgs(scargs._structureChangeType, runtimeId);
}
case EventArgsType.AsyncContentLoaded:
{
UiaAsyncContentLoadedEventArgs aclargs = (UiaAsyncContentLoadedEventArgs)Marshal.PtrToStructure(argsAddr, typeof(UiaAsyncContentLoadedEventArgs));
return new AsyncContentLoadedEventArgs(aclargs._asyncContentLoadedState, aclargs._percentComplete);
}
case EventArgsType.WindowClosed:
{
UiaWindowClosedEventArgs wcargs = (UiaWindowClosedEventArgs)Marshal.PtrToStructure(argsAddr, typeof(UiaWindowClosedEventArgs));
int[] runtimeId = ArrayFromIntPtr(wcargs._pRuntimeId, wcargs._cRuntimeIdLen);
return new WindowClosedEventArgs(runtimeId);
}
}
Debug.Assert(false, "Unknown event type from core:" + args._type);
return null;
}
#endregion EventArgs translation
//
// Pattern methods...
//
#region Pattern methods
internal static void DockPattern_SetDockPosition(SafePatternHandle hobj, DockPosition dockPosition)
{
CheckError(RawDockPattern_SetDockPosition(hobj, dockPosition));
}
internal static void ExpandCollapsePattern_Collapse(SafePatternHandle hobj)
{
CheckError(RawExpandCollapsePattern_Collapse(hobj));
}
internal static void ExpandCollapsePattern_Expand(SafePatternHandle hobj)
{
CheckError(RawExpandCollapsePattern_Expand(hobj));
}
internal static SafeNodeHandle GridPattern_GetItem(SafePatternHandle hobj, int row, int column)
{
SafeNodeHandle result;
CheckError(RawGridPattern_GetItem(hobj, row, column, out result));
// Whidbey RTM SafeHandle/PInvoke bug workaround - SafeHandles on 64 can come back
// as null, should be non-null but Invalid. This fixes up to non-null.
if (result == null)
{
result = new SafeNodeHandle();
}
return result;
}
internal static void InvokePattern_Invoke(SafePatternHandle hobj)
{
CheckError(RawInvokePattern_Invoke(hobj));
}
internal static string MultipleViewPattern_GetViewName(SafePatternHandle hobj, int viewId)
{
string result;
CheckError(RawMultipleViewPattern_GetViewName(hobj, viewId, out result));
return result;
}
internal static void MultipleViewPattern_SetCurrentView(SafePatternHandle hobj, int viewId)
{
CheckError(RawMultipleViewPattern_SetCurrentView(hobj, viewId));
}
internal static void RangeValuePattern_SetValue(SafePatternHandle hobj, double val)
{
CheckError(RawRangeValuePattern_SetValue(hobj, val));
}
internal static void ScrollItemPattern_ScrollIntoView(SafePatternHandle hobj)
{
CheckError(RawScrollItemPattern_ScrollIntoView(hobj));
}
internal static void ScrollPattern_Scroll(SafePatternHandle hobj, ScrollAmount horizontalAmount, ScrollAmount verticalAmount)
{
CheckError(RawScrollPattern_Scroll(hobj, horizontalAmount, verticalAmount));
}
internal static void ScrollPattern_SetScrollPercent(SafePatternHandle hobj, double horizontalPercent, double verticalPercent)
{
CheckError(RawScrollPattern_SetScrollPercent(hobj, horizontalPercent, verticalPercent));
}
internal static void SelectionItemPattern_AddToSelection(SafePatternHandle hobj)
{
CheckError(RawSelectionItemPattern_AddToSelection(hobj));
}
internal static void SelectionItemPattern_RemoveFromSelection(SafePatternHandle hobj)
{
CheckError(RawSelectionItemPattern_RemoveFromSelection(hobj));
}
internal static void SelectionItemPattern_Select(SafePatternHandle hobj)
{
CheckError(RawSelectionItemPattern_Select(hobj));
}
internal static void TogglePattern_Toggle(SafePatternHandle hobj)
{
CheckError(RawTogglePattern_Toggle(hobj));
}
internal static void TransformPattern_Move(SafePatternHandle hobj, double x, double y)
{
CheckError(RawTransformPattern_Move(hobj, x, y));
}
internal static void TransformPattern_Resize(SafePatternHandle hobj, double width, double height)
{
CheckError(RawTransformPattern_Resize(hobj, width, height));
}
internal static void TransformPattern_Rotate(SafePatternHandle hobj, double degrees)
{
CheckError(RawTransformPattern_Rotate(hobj, degrees));
}
internal static void ValuePattern_SetValue(SafePatternHandle hobj, string pVal)
{
CheckError(RawValuePattern_SetValue(hobj, pVal));
}
internal static void WindowPattern_Close(SafePatternHandle hobj)
{
CheckError(RawWindowPattern_Close(hobj));
}
internal static void WindowPattern_SetWindowVisualState(SafePatternHandle hobj, WindowVisualState state)
{
CheckError(RawWindowPattern_SetWindowVisualState(hobj, state));
}
internal static bool WindowPattern_WaitForInputIdle(SafePatternHandle hobj, int milliseconds)
{
bool result;
CheckError(RawWindowPattern_WaitForInputIdle(hobj, milliseconds, out result));
return result;
}
#endregion Pattern methods
//
// Text methods...
//
#region Text methods
internal static SafeTextRangeHandle [] TextPattern_GetSelection(SafePatternHandle hobj)
{
object[] arr;
CheckError(RawTextPattern_GetSelection(hobj, out arr));
if (arr == null)
{
return new SafeTextRangeHandle[] { };
}
SafeTextRangeHandle[] result = new SafeTextRangeHandle[arr.Length];
for (int i = 0; i < arr.Length; i++)
{
result[i] = UiaHTextRangeFromVariant(arr[i]);
}
return result;
}
internal static SafeTextRangeHandle[] TextPattern_GetVisibleRanges(SafePatternHandle hobj)
{
object[] arr;
CheckError(RawTextPattern_GetVisibleRanges(hobj, out arr));
if (arr == null)
{
return new SafeTextRangeHandle[] { };
}
SafeTextRangeHandle[] result = new SafeTextRangeHandle[arr.Length];
for (int i = 0; i < arr.Length; i++)
{
result[i] = UiaHTextRangeFromVariant(arr[i]);
}
return result;
}
internal static SafeTextRangeHandle TextPattern_RangeFromChild(SafePatternHandle hobj, SafeNodeHandle childElement)
{
SafeTextRangeHandle result;
CheckError(RawTextPattern_RangeFromChild(hobj, childElement, out result));
// Whidbey RTM SafeHandle/PInvoke bug workaround - SafeHandles on 64 can come back
// as null, should be non-null but Invalid. This fixes up to non-null.
if (result == null)
{
result = new SafeTextRangeHandle();
}
return result;
}
internal static SafeTextRangeHandle TextPattern_RangeFromPoint(SafePatternHandle hobj, Point point)
{
SafeTextRangeHandle result;
CheckError(RawTextPattern_RangeFromPoint(hobj, point, out result));
// Whidbey RTM SafeHandle/PInvoke bug workaround - SafeHandles on 64 can come back
// as null, should be non-null but Invalid. This fixes up to non-null.
if (result == null)
{
result = new SafeTextRangeHandle();
}
return result;
}
internal static SafeTextRangeHandle TextPattern_get_DocumentRange(SafePatternHandle hobj)
{
SafeTextRangeHandle result;
CheckError(RawTextPattern_get_DocumentRange(hobj, out result));
// Whidbey RTM SafeHandle/PInvoke bug workaround - SafeHandles on 64 can come back
// as null, should be non-null but Invalid. This fixes up to non-null.
if (result == null)
{
result = new SafeTextRangeHandle();
}
return result;
}
internal static SupportedTextSelection TextPattern_get_SupportedTextSelection(SafePatternHandle hobj)
{
SupportedTextSelection result;
CheckError(RawTextPattern_get_SupportedTextSelection(hobj, out result));
return result;
}
internal static SafeTextRangeHandle TextRange_Clone(SafeTextRangeHandle hobj)
{
SafeTextRangeHandle result;
CheckError(RawTextRange_Clone(hobj, out result));
// Whidbey RTM SafeHandle/PInvoke bug workaround - SafeHandles on 64 can come back
// as null, should be non-null but Invalid. This fixes up to non-null.
if (result == null)
{
result = new SafeTextRangeHandle();
}
return result;
}
internal static bool TextRange_Compare(SafeTextRangeHandle hobj, SafeTextRangeHandle range)
{
bool result;
CheckError(RawTextRange_Compare(hobj, range, out result));
return result;
}
internal static int TextRange_CompareEndpoints(SafeTextRangeHandle hobj, TextPatternRangeEndpoint endpoint, SafeTextRangeHandle targetRange, TextPatternRangeEndpoint targetEndpoint)
{
int result;
CheckError(RawTextRange_CompareEndpoints(hobj, endpoint, targetRange, targetEndpoint, out result));
return result;
}
internal static void TextRange_ExpandToEnclosingUnit(SafeTextRangeHandle hobj, TextUnit unit)
{
CheckError(RawTextRange_ExpandToEnclosingUnit(hobj, unit));
}
internal static SafeTextRangeHandle TextRange_FindAttribute(SafeTextRangeHandle hobj, int attributeId, object val, bool backward)
{
SafeTextRangeHandle result;
CheckError(RawTextRange_FindAttribute(hobj, attributeId, val, backward, out result));
// Whidbey RTM SafeHandle/PInvoke bug workaround - SafeHandles on 64 can come back
// as null, should be non-null but Invalid. This fixes up to non-null.
if (result == null)
{
result = new SafeTextRangeHandle();
}
return result;
}
internal static SafeTextRangeHandle TextRange_FindText(SafeTextRangeHandle hobj, string text, bool backward, bool ignoreCase)
{
SafeTextRangeHandle result;
CheckError(RawTextRange_FindText(hobj, text, backward, ignoreCase, out result));
// Whidbey RTM SafeHandle/PInvoke bug workaround - SafeHandles on 64 can come back
// as null, should be non-null but Invalid. This fixes up to non-null.
if (result == null)
{
result = new SafeTextRangeHandle();
}
return result;
}
internal static object TextRange_GetAttributeValue(SafeTextRangeHandle hobj, int attributeId)
{
object result;
CheckError(RawTextRange_GetAttributeValue(hobj, attributeId, out result));
return result;
}
internal static Rect[] TextRange_GetBoundingRectangles(SafeTextRangeHandle hobj)
{
double[] doubles;
CheckError(RawTextRange_GetBoundingRectangles(hobj, out doubles));
if (doubles == null)
{
return null;
}
int count = doubles.Length / 4;
int leftover = doubles.Length % 4;
if (leftover != 0)
return null;
Rect[] rects = new Rect[count];
int scan = 0;
for (int i = 0; i < count; i++)
{
double x = doubles[scan++];
double y = doubles[scan++];
double width = doubles[scan++];
double height = doubles[scan++];
if(width <= 0 || height <= 0)
rects[i] = Rect.Empty;
else
rects[i] = new Rect(x, y, width, height);
}
return rects;
}
internal static SafeNodeHandle TextRange_GetEnclosingElement(SafeTextRangeHandle hobj)
{
SafeNodeHandle result;
CheckError(RawTextRange_GetEnclosingElement(hobj, out result));
// Whidbey RTM SafeHandle/PInvoke bug workaround - SafeHandles on 64 can come back
// as null, should be non-null but Invalid. This fixes up to non-null.
if (result == null)
{
result = new SafeNodeHandle();
}
return result;
}
internal static string TextRange_GetText(SafeTextRangeHandle hobj, int maxLength)
{
string result;
CheckError(RawTextRange_GetText(hobj, maxLength, out result));
return result;
}
internal static int TextRange_Move(SafeTextRangeHandle hobj, TextUnit unit, int count)
{
int result;
CheckError(RawTextRange_Move(hobj, unit, count, out result));
return result;
}
internal static int TextRange_MoveEndpointByUnit(SafeTextRangeHandle hobj, TextPatternRangeEndpoint endpoint, TextUnit unit, int count)
{
int result;
CheckError(RawTextRange_MoveEndpointByUnit(hobj, endpoint, unit, count, out result));
return result;
}
internal static void TextRange_MoveEndpointByRange(SafeTextRangeHandle hobj, TextPatternRangeEndpoint endpoint, SafeTextRangeHandle targetRange, TextPatternRangeEndpoint targetEndpoint)
{
CheckError(RawTextRange_MoveEndpointByRange(hobj, endpoint, targetRange, targetEndpoint));
}
internal static void TextRange_Select(SafeTextRangeHandle hobj)
{
CheckError(RawTextRange_Select(hobj));
}
internal static void TextRange_AddToSelection(SafeTextRangeHandle hobj)
{
CheckError(RawTextRange_AddToSelection(hobj));
}
internal static void TextRange_RemoveFromSelection(SafeTextRangeHandle hobj)
{
CheckError(RawTextRange_RemoveFromSelection(hobj));
}
internal static void TextRange_ScrollIntoView(SafeTextRangeHandle hobj, bool alignToTop)
{
CheckError(RawTextRange_ScrollIntoView(hobj, alignToTop));
}
internal static object[] TextRange_GetChildren(SafeTextRangeHandle hobj)
{
object[] result;
CheckError(RawTextRange_GetChildren(hobj, out result));
return result;
}
#endregion Text methods
//
// Other methods...
//
internal static bool IsErrorMarker(object val, bool throwException)
{
// Errors/exceptions in cacherequest array are represented as
// an array of two objects, the first is VT_ERROR, which maps
// to int; and the second is an VT_UNKNOWN/IErrorInfo, which
// maps to object.
object[] arr = val as object[];
if (arr == null || arr.Length != 2)
return false;
if (!(arr[0] is int))
return false;
// Exception slot can be null, or an IErrorInfo (if from local unmanaged or
// remote provider), or a CLR Exception object (if from local managed code - Exception
// implements IErrorInfo, and effectively "passes through" uiacore).
// IsComObject returns true only for non-CLR (eg. unmanaged) objects, so we have to check
// for CLR Exception objects (with "is Exception") separately.
if(arr[1] != null
&& !Marshal.IsComObject(arr[1])
&& !(arr[1] is Exception) )
return false;
if(throwException)
{
int hr = (int)arr[0];
object errorInfo = arr[1];
if (errorInfo != null)
{
// Marshal.ThrowExceptionForHR(hr, IntPtr) seems to ignore the errorInfo, but if we
// explicitly set it as a the errorInfo for this thread using SetErrorInfo, it works(!)...
// Note that the errorInfo can be null; in which case we just don't use it.
IntPtr errorInfoAsIntPtr = Marshal.GetIUnknownForObject(errorInfo);
#pragma warning suppress 6031, 6532, 56031
SetErrorInfo(0, errorInfoAsIntPtr); // ignore return value
Marshal.Release(errorInfoAsIntPtr);
}
Marshal.ThrowExceptionForHR(hr);
}
return true;
}
#endregion Internal Methods
//-----------------------------------------------------
//
// Private Methods
//
//-----------------------------------------------------
#region Private Methods
[DllImport(DllImport.UIAutomationCore, CharSet = CharSet.Unicode)]
private static extern bool UiaGetErrorDescription([MarshalAs(UnmanagedType.BStr)] out string pDescription);
[DllImport("oleaut32.dll")]
private static extern int SetErrorInfo(int dwReserved, IntPtr errorInfo);
// Check hresult for error, and handle mapping to UIA-specific
// exceptions...
private static void CheckError(int hr)
{
if (hr >= 0)
{
return;
}
// Handle these UIA exceptions specially - COM Interop
// maps others (eg. InvalidArgument), but not these:
if (hr == UIA_E_ELEMENTNOTENABLED
|| hr == UIA_E_ELEMENTNOTAVAILABLE
|| hr == UIA_E_NOCLICKABLEPOINT
|| hr == UIA_E_PROXYASSEMBLYNOTLOADED)
{
string description;
if (!UiaGetErrorDescription(out description))
description = SR.Get(SRID.UnknownCoreAPIError);
switch (hr)
{
case UIA_E_ELEMENTNOTENABLED:
throw new ElementNotEnabledException(description);
case UIA_E_ELEMENTNOTAVAILABLE:
throw new ElementNotAvailableException(description);
case UIA_E_NOCLICKABLEPOINT:
throw new NoClickablePointException(description);
case UIA_E_PROXYASSEMBLYNOTLOADED:
throw new ProxyAssemblyNotLoadedException(description);
}
}
// Not a UIA-specific exception - let COM Interop handle the rest.
// (Marshal.ThrowExceptionForHR automatically calls GetErrorInfo to fill in the description
// field - UIA sets the error info itself, so it will get propogated here.)
Marshal.ThrowExceptionForHR(hr);
}
#endregion Private Methods
#region Raw API methods
//
// Client-side methods...
//
[DllImport(DllImport.UIAutomationCore, EntryPoint = "UiaGetPropertyValue", CharSet = CharSet.Unicode)]
private static extern int RawUiaGetPropertyValue(SafeNodeHandle hnode, int propertyId, out object value);
[DllImport(DllImport.UIAutomationCore, EntryPoint = "UiaGetPatternProvider", CharSet = CharSet.Unicode)]
private static extern int RawUiaGetPatternProvider(SafeNodeHandle hnode, int patternId, out SafePatternHandle phobj);
[DllImport(DllImport.UIAutomationCore, EntryPoint = "UiaGetRuntimeId", CharSet = CharSet.Unicode)]
private static extern int RawUiaGetRuntimeId(SafeNodeHandle hnode, [MarshalAs(UnmanagedType.SafeArray)] out int[] runtimeId);
[DllImport(DllImport.UIAutomationCore, EntryPoint = "UiaSetFocus", CharSet = CharSet.Unicode)]
private static extern int RawUiaSetFocus(SafeNodeHandle hnode);
[DllImport(DllImport.UIAutomationCore, EntryPoint = "UiaNavigate", CharSet = CharSet.Unicode)]
private static extern int RawUiaNavigate(SafeNodeHandle hnode, NavigateDirection direction, SafeConditionMemoryHandle condition, UiaMiniCacheRequest pRequest, [MarshalAs(UnmanagedType.SafeArray, SafeArraySubType = VarEnum.VT_VARIANT)] out object[,] requestedData, [MarshalAs(UnmanagedType.BStr)] out string treeStructure);
[DllImport(DllImport.UIAutomationCore, EntryPoint = "UiaFind", CharSet = CharSet.Unicode)]
private static extern int RawUiaFind(SafeNodeHandle hnode, ref UiaFindParams pParams, UiaMiniCacheRequest pRequest, [MarshalAs(UnmanagedType.SafeArray)] out object[,] requestedData, [MarshalAs(UnmanagedType.SafeArray, SafeArraySubType = VarEnum.VT_I4)] out int[] offsets, [MarshalAs(UnmanagedType.SafeArray, SafeArraySubType = VarEnum.VT_BSTR)] out string[] treeStructures);
[DllImport(DllImport.UIAutomationCore, EntryPoint = "UiaNodeFromHandle", CharSet = CharSet.Unicode)]
private static extern int RawUiaNodeFromHandle(IntPtr hwnd, out SafeNodeHandle hnode);
[DllImport(DllImport.UIAutomationCore, EntryPoint = "UiaNodeFromProvider", CharSet = CharSet.Unicode)]
private static extern int RawUiaNodeFromProvider(IRawElementProviderSimple provider, out SafeNodeHandle hode);
[DllImport(DllImport.UIAutomationCore, EntryPoint = "UiaGetRootNode", CharSet = CharSet.Unicode)]
private static extern int RawUiaGetRootNode(out SafeNodeHandle hnode);
[DllImport(DllImport.UIAutomationCore, EntryPoint = "UiaNodeFromPoint", CharSet = CharSet.Unicode)]
private static extern int RawUiaNodeFromPoint(double x, double y, UiaMiniCacheRequest request, [MarshalAs(UnmanagedType.SafeArray, SafeArraySubType = VarEnum.VT_VARIANT)] out object[,] requestedData, [MarshalAs(UnmanagedType.BStr)] out string treeStructure);
[DllImport(DllImport.UIAutomationCore, EntryPoint = "UiaNodeFromFocus", CharSet = CharSet.Unicode)]
private static extern int RawUiaNodeFromFocus(UiaMiniCacheRequest pRequest, [MarshalAs(UnmanagedType.SafeArray, SafeArraySubType = VarEnum.VT_VARIANT)] out object[,] requestedData, [MarshalAs(UnmanagedType.BStr)] out string treeStructure);
[DllImport(DllImport.UIAutomationCore, EntryPoint = "UiaGetUpdatedCache", CharSet = CharSet.Unicode)]
private static extern int RawUiaGetUpdatedCache(SafeNodeHandle hnode, UiaMiniCacheRequest pRequest, NormalizeState normalizeState, SafeConditionMemoryHandle pNormalizeCondition, [MarshalAs(UnmanagedType.SafeArray, SafeArraySubType = VarEnum.VT_VARIANT)] out object[,] requestedData, [MarshalAs(UnmanagedType.BStr)] out string treeStructure);
[DllImport(DllImport.UIAutomationCore, EntryPoint = "UiaHUiaNodeFromVariant", CharSet = CharSet.Unicode)]
private static extern int RawUiaHUiaNodeFromVariant([MarshalAs(UnmanagedType.Struct)] ref object var, out SafeNodeHandle hnode);
[DllImport(DllImport.UIAutomationCore, EntryPoint = "UiaHPatternObjectFromVariant", CharSet = CharSet.Unicode)]
private static extern int RawUiaHPatternObjectFromVariant([MarshalAs(UnmanagedType.Struct)] ref object var, out SafePatternHandle hnode);
[DllImport(DllImport.UIAutomationCore, EntryPoint = "UiaHTextRangeFromVariant", CharSet = CharSet.Unicode)]
private static extern int RawUiaHTextRangeFromVariant([MarshalAs(UnmanagedType.Struct)] ref object var, out SafeTextRangeHandle hnode);
[SecurityCritical]
[SuppressUnmanagedCodeSecurity]
[DllImport(DllImport.UIAutomationCore, EntryPoint = "UiaNodeRelease", CharSet = CharSet.Unicode)]
private static extern bool RawUiaNodeRelease(IntPtr hnode);
[SecurityCritical]
[SuppressUnmanagedCodeSecurity]
[DllImport(DllImport.UIAutomationCore, EntryPoint = "UiaPatternRelease", CharSet = CharSet.Unicode)]
private static extern bool RawUiaPatternRelease(IntPtr hobj);
[SecurityCritical]
[SuppressUnmanagedCodeSecurity]
[DllImport(DllImport.UIAutomationCore, EntryPoint = "UiaTextRangeRelease", CharSet = CharSet.Unicode)]
private static extern bool RawUiaTextRangeRelease(IntPtr hobj);
// Event APIs...
[DllImport(DllImport.UIAutomationCore, EntryPoint = "UiaAddEvent", CharSet = CharSet.Unicode)]
private static extern int RawUiaAddEvent(SafeNodeHandle hnode, int eventId, UiaEventCallback callback, TreeScope scope, [MarshalAs(UnmanagedType.LPArray)] int[] pProperties, int cProperties, UiaMiniCacheRequest pRequest, out SafeEventHandle hevent);
[DllImport(DllImport.UIAutomationCore, EntryPoint = "UiaRemoveEvent", CharSet = CharSet.Unicode)]
private static extern int RawUiaRemoveEvent(IntPtr hevent);
[DllImport(DllImport.UIAutomationCore, EntryPoint = "UiaEventAddWindow", CharSet = CharSet.Unicode)]
private static extern int RawUiaEventAddWindow(SafeEventHandle hevent, IntPtr hwnd);
[DllImport(DllImport.UIAutomationCore, EntryPoint = "UiaEventRemoveWindow", CharSet = CharSet.Unicode)]
private static extern int RawUiaEventRemoveWindow(SafeEventHandle hevent, IntPtr hwnd);
#endregion Raw API methods
#region Raw Pattern methods
[DllImport(DllImport.UIAutomationCore, EntryPoint = "DockPattern_SetDockPosition", CharSet = CharSet.Unicode)]
private static extern int RawDockPattern_SetDockPosition(SafePatternHandle hobj, DockPosition dockPosition);
[DllImport(DllImport.UIAutomationCore, EntryPoint = "ExpandCollapsePattern_Collapse", CharSet = CharSet.Unicode)]
private static extern int RawExpandCollapsePattern_Collapse(SafePatternHandle hobj);
[DllImport(DllImport.UIAutomationCore, EntryPoint = "ExpandCollapsePattern_Expand", CharSet = CharSet.Unicode)]
private static extern int RawExpandCollapsePattern_Expand(SafePatternHandle hobj);
[DllImport(DllImport.UIAutomationCore, EntryPoint = "GridPattern_GetItem", CharSet = CharSet.Unicode)]
private static extern int RawGridPattern_GetItem(SafePatternHandle hobj, int row, int column, out SafeNodeHandle pResult);
[DllImport(DllImport.UIAutomationCore, EntryPoint = "InvokePattern_Invoke", CharSet = CharSet.Unicode)]
private static extern int RawInvokePattern_Invoke(SafePatternHandle hobj);
[DllImport(DllImport.UIAutomationCore, EntryPoint = "MultipleViewPattern_GetViewName", CharSet = CharSet.Unicode)]
private static extern int RawMultipleViewPattern_GetViewName(SafePatternHandle hobj, int viewId, [MarshalAs(UnmanagedType.BStr)] out string ppStr);
[DllImport(DllImport.UIAutomationCore, EntryPoint = "MultipleViewPattern_SetCurrentView", CharSet = CharSet.Unicode)]
private static extern int RawMultipleViewPattern_SetCurrentView(SafePatternHandle hobj, int viewId);
[DllImport(DllImport.UIAutomationCore, EntryPoint = "RangeValuePattern_SetValue", CharSet = CharSet.Unicode)]
private static extern int RawRangeValuePattern_SetValue(SafePatternHandle hobj, double val);
[DllImport(DllImport.UIAutomationCore, EntryPoint = "ScrollItemPattern_ScrollIntoView", CharSet = CharSet.Unicode)]
private static extern int RawScrollItemPattern_ScrollIntoView(SafePatternHandle hobj);
[DllImport(DllImport.UIAutomationCore, EntryPoint = "ScrollPattern_Scroll", CharSet = CharSet.Unicode)]
private static extern int RawScrollPattern_Scroll(SafePatternHandle hobj, ScrollAmount horizontalAmount, ScrollAmount verticalAmount);
[DllImport(DllImport.UIAutomationCore, EntryPoint = "ScrollPattern_SetScrollPercent", CharSet = CharSet.Unicode)]
private static extern int RawScrollPattern_SetScrollPercent(SafePatternHandle hobj, double horizontalPercent, double verticalPercent);
[DllImport(DllImport.UIAutomationCore, EntryPoint = "SelectionItemPattern_AddToSelection", CharSet = CharSet.Unicode)]
private static extern int RawSelectionItemPattern_AddToSelection(SafePatternHandle hobj);
[DllImport(DllImport.UIAutomationCore, EntryPoint = "SelectionItemPattern_RemoveFromSelection", CharSet = CharSet.Unicode)]
private static extern int RawSelectionItemPattern_RemoveFromSelection(SafePatternHandle hobj);
[DllImport(DllImport.UIAutomationCore, EntryPoint = "SelectionItemPattern_Select", CharSet = CharSet.Unicode)]
private static extern int RawSelectionItemPattern_Select(SafePatternHandle hobj);
[DllImport(DllImport.UIAutomationCore, EntryPoint = "TogglePattern_Toggle", CharSet = CharSet.Unicode)]
private static extern int RawTogglePattern_Toggle(SafePatternHandle hobj);
[DllImport(DllImport.UIAutomationCore, EntryPoint = "TransformPattern_Move", CharSet = CharSet.Unicode)]
private static extern int RawTransformPattern_Move(SafePatternHandle hobj, double x, double y);
[DllImport(DllImport.UIAutomationCore, EntryPoint = "TransformPattern_Resize", CharSet = CharSet.Unicode)]
private static extern int RawTransformPattern_Resize(SafePatternHandle hobj, double width, double height);
[DllImport(DllImport.UIAutomationCore, EntryPoint = "TransformPattern_Rotate", CharSet = CharSet.Unicode)]
private static extern int RawTransformPattern_Rotate(SafePatternHandle hobj, double degrees);
[DllImport(DllImport.UIAutomationCore, EntryPoint = "ValuePattern_SetValue", CharSet = CharSet.Unicode)]
private static extern int RawValuePattern_SetValue(SafePatternHandle hobj, [MarshalAs(UnmanagedType.LPWStr)] string pVal);
[DllImport(DllImport.UIAutomationCore, EntryPoint = "WindowPattern_Close", CharSet = CharSet.Unicode)]
private static extern int RawWindowPattern_Close(SafePatternHandle hobj);
[DllImport(DllImport.UIAutomationCore, EntryPoint = "WindowPattern_SetWindowVisualState", CharSet = CharSet.Unicode)]
private static extern int RawWindowPattern_SetWindowVisualState(SafePatternHandle hobj, WindowVisualState state);
[DllImport(DllImport.UIAutomationCore, EntryPoint = "WindowPattern_WaitForInputIdle", CharSet = CharSet.Unicode)]
private static extern int RawWindowPattern_WaitForInputIdle(SafePatternHandle hobj, int milliseconds, out bool pResult);
#endregion Raw Pattern methods
#region Text methods
[DllImport(DllImport.UIAutomationCore, EntryPoint = "TextPattern_GetSelection", CharSet = CharSet.Unicode)]
private static extern int RawTextPattern_GetSelection(SafePatternHandle hobj, [MarshalAs(UnmanagedType.SafeArray, SafeArraySubType = VarEnum.VT_VARIANT)]out object[] result);
[DllImport(DllImport.UIAutomationCore, EntryPoint = "TextPattern_GetVisibleRanges", CharSet = CharSet.Unicode)]
private static extern int RawTextPattern_GetVisibleRanges(SafePatternHandle hobj, [MarshalAs(UnmanagedType.SafeArray, SafeArraySubType = VarEnum.VT_VARIANT)]out object[] result);
[DllImport(DllImport.UIAutomationCore, EntryPoint = "TextPattern_RangeFromChild", CharSet = CharSet.Unicode)]
private static extern int RawTextPattern_RangeFromChild(SafePatternHandle hobj, SafeNodeHandle childElement, out SafeTextRangeHandle result);
[DllImport(DllImport.UIAutomationCore, EntryPoint = "TextPattern_RangeFromPoint", CharSet = CharSet.Unicode)]
private static extern int RawTextPattern_RangeFromPoint(SafePatternHandle hobj, Point point, out SafeTextRangeHandle result);
[DllImport(DllImport.UIAutomationCore, EntryPoint = "TextPattern_get_DocumentRange", CharSet = CharSet.Unicode)]
private static extern int RawTextPattern_get_DocumentRange(SafePatternHandle hobj, out SafeTextRangeHandle result);
[DllImport(DllImport.UIAutomationCore, EntryPoint = "TextPattern_get_SupportedTextSelection", CharSet = CharSet.Unicode)]
private static extern int RawTextPattern_get_SupportedTextSelection(SafePatternHandle hobj, out SupportedTextSelection result);
[DllImport(DllImport.UIAutomationCore, EntryPoint = "TextRange_Clone", CharSet = CharSet.Unicode)]
private static extern int RawTextRange_Clone(SafeTextRangeHandle hobj, out SafeTextRangeHandle result);
[DllImport(DllImport.UIAutomationCore, EntryPoint = "TextRange_Compare", CharSet = CharSet.Unicode)]
private static extern int RawTextRange_Compare(SafeTextRangeHandle hobj, SafeTextRangeHandle range, out bool result);
[DllImport(DllImport.UIAutomationCore, EntryPoint = "TextRange_CompareEndpoints", CharSet = CharSet.Unicode)]
private static extern int RawTextRange_CompareEndpoints(SafeTextRangeHandle hobj, TextPatternRangeEndpoint endpoint, SafeTextRangeHandle targetRange, TextPatternRangeEndpoint targetEndpoint, out int result);
[DllImport(DllImport.UIAutomationCore, EntryPoint = "TextRange_ExpandToEnclosingUnit", CharSet = CharSet.Unicode)]
private static extern int RawTextRange_ExpandToEnclosingUnit(SafeTextRangeHandle hobj, TextUnit unit);
[DllImport(DllImport.UIAutomationCore, EntryPoint = "TextRange_FindAttribute", CharSet = CharSet.Unicode)]
private static extern int RawTextRange_FindAttribute(SafeTextRangeHandle hobj, int attributeId, object val, bool backward, out SafeTextRangeHandle result);
[DllImport(DllImport.UIAutomationCore, EntryPoint = "TextRange_FindText", CharSet = CharSet.Unicode)]
private static extern int RawTextRange_FindText(SafeTextRangeHandle hobj, [MarshalAs(UnmanagedType.BStr)] string text, bool backward, bool ignoreCase, out SafeTextRangeHandle result);
[DllImport(DllImport.UIAutomationCore, EntryPoint = "TextRange_GetAttributeValue", CharSet = CharSet.Unicode)]
private static extern int RawTextRange_GetAttributeValue(SafeTextRangeHandle hobj, int attributeId, out object result);
[DllImport(DllImport.UIAutomationCore, EntryPoint = "TextRange_GetBoundingRectangles", CharSet = CharSet.Unicode)]
private static extern int RawTextRange_GetBoundingRectangles(SafeTextRangeHandle hobj, [MarshalAs(UnmanagedType.SafeArray, SafeArraySubType = VarEnum.VT_R8)] out double[] result);
[DllImport(DllImport.UIAutomationCore, EntryPoint = "TextRange_GetEnclosingElement", CharSet = CharSet.Unicode)]
private static extern int RawTextRange_GetEnclosingElement(SafeTextRangeHandle hobj, out SafeNodeHandle result);
[DllImport(DllImport.UIAutomationCore, EntryPoint = "TextRange_GetText", CharSet = CharSet.Unicode)]
private static extern int RawTextRange_GetText(SafeTextRangeHandle hobj, int maxLength, [MarshalAs(UnmanagedType.BStr)] out string result);
[DllImport(DllImport.UIAutomationCore, EntryPoint = "TextRange_Move", CharSet = CharSet.Unicode)]
private static extern int RawTextRange_Move(SafeTextRangeHandle hobj, TextUnit unit, int count, out int result);
[DllImport(DllImport.UIAutomationCore, EntryPoint = "TextRange_MoveEndpointByUnit", CharSet = CharSet.Unicode)]
private static extern int RawTextRange_MoveEndpointByUnit(SafeTextRangeHandle hobj, TextPatternRangeEndpoint endpoint, TextUnit unit, int count, out int result);
[DllImport(DllImport.UIAutomationCore, EntryPoint = "TextRange_MoveEndpointByRange", CharSet = CharSet.Unicode)]
private static extern int RawTextRange_MoveEndpointByRange(SafeTextRangeHandle hobj, TextPatternRangeEndpoint endpoint, SafeTextRangeHandle targetRange, TextPatternRangeEndpoint targetEndpoint);
[DllImport(DllImport.UIAutomationCore, EntryPoint = "TextRange_Select", CharSet = CharSet.Unicode)]
private static extern int RawTextRange_Select(SafeTextRangeHandle hobj);
[DllImport(DllImport.UIAutomationCore, EntryPoint = "TextRange_AddToSelection", CharSet = CharSet.Unicode)]
private static extern int RawTextRange_AddToSelection(SafeTextRangeHandle hobj);
[DllImport(DllImport.UIAutomationCore, EntryPoint = "TextRange_RemoveFromSelection", CharSet = CharSet.Unicode)]
private static extern int RawTextRange_RemoveFromSelection(SafeTextRangeHandle hobj);
[DllImport(DllImport.UIAutomationCore, EntryPoint = "TextRange_ScrollIntoView", CharSet = CharSet.Unicode)]
private static extern int RawTextRange_ScrollIntoView(SafeTextRangeHandle hobj, bool alignToTop);
[DllImport(DllImport.UIAutomationCore, EntryPoint = "TextRange_GetChildren", CharSet = CharSet.Unicode)]
private static extern int RawTextRange_GetChildren(SafeTextRangeHandle hobj, [MarshalAs(UnmanagedType.SafeArray, SafeArraySubType = VarEnum.VT_UNKNOWN)] out object[] result);
#endregion Text methods
//-----------------------------------------------------
//
// Private Types (Event support)
//
//------------------------------------------------------
#region Private types
// Unmanaged equivalents of the various EventArgs,
// used by GetUiaEventArgs.
private enum EventArgsType
{
Simple,
PropertyChanged,
StructureChanged,
AsyncContentLoaded,
WindowClosed
}
[StructLayout(LayoutKind.Sequential)]
private struct UiaEventArgs
{
internal EventArgsType _type;
internal int _eventId;
}
[StructLayout(LayoutKind.Sequential)]
private struct UiaPropertyChangedEventArgs
{
internal EventArgsType _type;
internal int _eventId;
internal int _propertyId;
[MarshalAs(UnmanagedType.Struct)] // UnmanagedType.Struct == use VARIANT
internal object _oldValue;
[MarshalAs(UnmanagedType.Struct)] // UnmanagedType.Struct == use VARIANT
internal object _newValue;
}
[StructLayout(LayoutKind.Sequential)]
private struct UiaStructureChangedEventArgs
{
internal EventArgsType _type;
internal int _eventId;
internal StructureChangeType _structureChangeType;
internal IntPtr _pRuntimeId;
internal int _cRuntimeIdLen;
}
[StructLayout(LayoutKind.Sequential)]
private struct UiaAsyncContentLoadedEventArgs
{
internal EventArgsType _type;
internal int _eventId;
internal AsyncContentLoadedState _asyncContentLoadedState;
internal double _percentComplete;
}
[StructLayout(LayoutKind.Sequential)]
private struct UiaWindowClosedEventArgs
{
internal EventArgsType _type;
internal int _eventId;
internal IntPtr _pRuntimeId;
internal int _cRuntimeIdLen;
}
#endregion Private types
//-----------------------------------------------------
//
// Static ctor & Proxy callback
//
//------------------------------------------------------
#region static ctor and proxy callback
private enum ProviderType
{
BaseHwnd,
Proxy,
NonClientArea,
};
[return: MarshalAs(UnmanagedType.SafeArray, SafeArraySubType = VarEnum.VT_UNKNOWN)]
private delegate IRawElementProviderSimple[] UiaProviderCallback(IntPtr hwnd, ProviderType providerType);
[DllImport(DllImport.UIAutomationCore, CharSet = CharSet.Unicode)]
private static extern void UiaRegisterProviderCallback(UiaProviderCallback pCallback);
static GCHandle _gchandle;
static UiaCoreApi()
{
UiaProviderCallback onGetProviderDelegate = new UiaProviderCallback(OnGetProvider);
_gchandle = GCHandle.Alloc(onGetProviderDelegate);
UiaRegisterProviderCallback(onGetProviderDelegate);
}
static private
IRawElementProviderSimple [] OnGetProvider(IntPtr hwnd, ProviderType providerType)
{
IRawElementProviderSimple provider;
try
{
switch (providerType)
{
case ProviderType.BaseHwnd:
provider = new HwndProxyElementProvider(NativeMethods.HWND.Cast(hwnd));
break;
case ProviderType.Proxy:
provider = ProxyManager.ProxyProviderFromHwnd(NativeMethods.HWND.Cast(hwnd), 0, UnsafeNativeMethods.OBJID_CLIENT);
break;
case ProviderType.NonClientArea:
provider = ProxyManager.GetNonClientProvider(hwnd);
break;
default:
provider = null;
break;
}
if (provider == null)
return null;
return new IRawElementProviderSimple[] { provider };
}
#pragma warning suppress 56500
catch (Exception)
{
// Must catch *all* exceptions here, even critical ones,
// since this is a callback called by unmanaged code.
// (COM interop effectively translates all exceptions into
// HR codes for COM interfaces, but here we have to do it
// manually.)
return null;
}
}
#endregion static ctor and proxy callback
}
}
// 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: Imports from unmanaged UiaCore DLL
//
// History:
// 06/02/2003 : BrendanM Ported to WCP
//
//---------------------------------------------------------------------------
// PRESHARP: In order to avoid generating warnings about unkown message numbers and unknown pragmas.
#pragma warning disable 1634, 1691
using System;
using System.Security;
using System.Runtime.InteropServices;
using System.Windows;
using System.Windows.Automation;
using System.Windows.Automation.Text;
using System.Windows.Automation.Provider;
using System.Diagnostics;
using MS.Win32;
using Microsoft.Internal;
namespace MS.Internal.Automation
{
// [SuppressUnmanagedCodeSecurity] is not used here, since currently
// this is a client-only DLL. After we split into client vs provider,
// the provider assembly will need that attribute on its own APIs.
internal static class UiaCoreApi
{
//-----------------------------------------------------
//
// Conditions enums and structs
//
//-----------------------------------------------------
#region Conditions
internal enum ConditionType
{
True = 0,
False = 1,
Property = 2,
And = 3,
Or = 4,
Not = 5
}
[StructLayout(LayoutKind.Sequential)]
internal struct UiaCondition
{
ConditionType _conditionType;
internal UiaCondition(ConditionType conditionType)
{
_conditionType = conditionType;
}
}
[StructLayout(LayoutKind.Sequential)]
internal struct UiaPropertyCondition
{
ConditionType _conditionType;
int _propertyId;
[MarshalAs(UnmanagedType.Struct)] // UnmanagedType.Struct == use VARIANT
object _value;
PropertyConditionFlags _flags;
internal UiaPropertyCondition(int propertyId, object value, PropertyConditionFlags flags)
{
_conditionType = ConditionType.Property;
_propertyId = propertyId;
_value = value;
_flags = flags;
}
}
[StructLayout(LayoutKind.Sequential)]
internal struct UiaAndOrCondition
{
ConditionType _conditionType;
public IntPtr _conditions; // ptr to array-of-ptrs to conditions
public int _conditionCount;
internal UiaAndOrCondition(ConditionType conditionType, IntPtr conditions, int conditionCount)
{
_conditionType = conditionType;
_conditions = conditions;
_conditionCount = conditionCount;
}
}
[StructLayout(LayoutKind.Sequential)]
internal struct UiaNotCondition
{
ConditionType _conditionType;
public IntPtr _condition;
internal UiaNotCondition(IntPtr condition)
{
_conditionType = ConditionType.Not;
_condition = condition;
}
}
#endregion Conditions
//------------------------------------------------------
//
// CacheRequest/CacheResponse
//
//-----------------------------------------------------
#region CacheRequest/Response
[StructLayout(LayoutKind.Sequential)]
internal class UiaCacheRequest
{
internal Condition _condition;
internal TreeScope _scope;
internal IntPtr _pProperties;
internal int _propertyCount;
internal IntPtr _pPatterns;
internal int _patternCount;
internal AutomationElementMode _automationElementMode;
// The following fields are not used by unmanaged code...
private AutomationProperty[] _properties;
private AutomationPattern[] _patterns;
public TreeScope TreeScope { get { return _scope; } }
public AutomationElementMode AutomationElementMode { get { return _automationElementMode; } }
public AutomationProperty [] Properties { get { return _properties; } }
public AutomationPattern [] Patterns { get { return _patterns; } }
internal UiaCacheRequest(Condition condition,
TreeScope scope,
AutomationProperty[] properties,
AutomationPattern[] patterns,
AutomationElementMode automationElementMode)
{
_condition = condition;
_scope = scope;
_automationElementMode = automationElementMode;
_properties = properties;
_patterns = patterns;
IntPtr dataStart = Marshal.AllocCoTaskMem((properties.Length + patterns.Length) * sizeof(int));
unsafe
{
int* pdata = (int*)dataStart;
_pProperties = (IntPtr)pdata;
_propertyCount = properties.Length;
for (int i = 0; i < properties.Length; i++)
{
*pdata++ = properties[i].Id;
}
_pPatterns = (IntPtr)pdata;
_patternCount = patterns.Length;
for (int i = 0; i < patterns.Length; i++)
{
*pdata++ = patterns[i].Id;
}
}
}
~UiaCacheRequest()
{
if (_pProperties != IntPtr.Zero)
{
// Since _pProperties points to the start of one allocation block
// that is used for both properties and patterns, this covers both...
Marshal.FreeCoTaskMem(_pProperties);
}
}
}
// This is not used in any of the DLL entry points - they have
// separate our params for the data and strings - but is used
// to hand back the data+strings in one unit to the ClientAPI caller.
internal struct UiaCacheResponse
{
private object[,] _requestedData;
private string _treeStructure;
// Note - this takes ownership of the requestedData array, and modifies it in-place
// (replacing VT_I4/VT_I8 node/pattern references with SafeHandles)
internal UiaCacheResponse(object[,] requestedData, string treeStructure, UiaCacheRequest request)
{
_requestedData = requestedData;
_treeStructure = treeStructure;
ConvertFromComTypesToClrTypes(_requestedData, request);
}
internal object[,] RequestedData { get { return _requestedData; } }
internal string TreeStructure { get { return _treeStructure; } }
private static void ConvertFromComTypesToClrTypes(object[,] data, UiaCacheRequest request)
{
// Handle empty case...
if (data == null)
{
return;
}
// Go through the data, and convert any references to an appropriate SafeHandle type -
// this ensures that they get released properly during cleanup.
//
// Note that there is a time window between getting the array back and having all the handles
// converted where a 'rude unload' (eg. by a host such as Yukon) could cause a handle leak,
// would need to change the underlying API to avoid this. May consider that in Beta2,
// but for Beta1, this does the job.
for(int objIndex = 0 ; objIndex < data.GetLength(0) ; objIndex++ )
{
// Handle position 0, which can be a hnode...
if (request._automationElementMode == AutomationElementMode.Full)
{
object val = data[objIndex, 0];
if (val != null)
{
SafeNodeHandle safeHandle = UiaHUiaNodeFromVariant(val);
data[objIndex, 0] = safeHandle;
}
}
// Handle properties - these can be other nodes, or in some cases, arrays of nodes
// Use the corresponding object converter from Schema to do the work here (these convert
// from int to enum, int[] to Rect, etc.)
for (int propertyIndex = 0; propertyIndex < request.Properties.Length; propertyIndex++)
{
// Convert property from the VARIANT in the array to a more CLR-friendly
// value - eg. enums are in the array as ints, so need to cast before
// returning.
object val = data[objIndex, 1 + propertyIndex];
if (val == null || val == AutomationElement.NotSupported || UiaCoreApi.IsErrorMarker(val, false/*throwException*/))
continue;
AutomationPropertyInfo pi;
if (Schema.GetPropertyInfo(request.Properties[propertyIndex], out pi))
{
if (pi.ObjectConverter != null)
{
data[objIndex, 1 + propertyIndex] = pi.ObjectConverter(val);
}
}
else
{
Debug.Assert(false, "unsupported property should not have made it this far");
}
}
// Handle patterns
int patternBaseIndex = 1 + request.Properties.Length;
for (int patternIndex = 0; patternIndex < request.Patterns.Length; patternIndex++)
{
object val = data[objIndex, patternBaseIndex + patternIndex];
if (val != null)
{
// Just wrap patterns to a SafeHandle, not a full pattern object, since patten
// object reqire a AutomationElement reference.
SafePatternHandle hpatternobj = UiaHPatternObjectFromVariant(val);
data[objIndex, patternBaseIndex + patternIndex] = hpatternobj;
}
}
}
}
}
// Subset of UiaCacheRequest for marshalling...
[StructLayout(LayoutKind.Sequential)]
private class UiaMiniCacheRequest
{
private IntPtr _pCondition;
private TreeScope _scope;
private IntPtr _pProperties;
private int _propertyCount;
private IntPtr _pPatterns;
private int _patternCount;
private AutomationElementMode _automationElementMode;
internal UiaMiniCacheRequest(UiaCacheRequest cr, IntPtr conditionPtr)
{
_pCondition = conditionPtr;
_scope = cr._scope;
_pProperties = cr._pProperties;
_propertyCount = cr._propertyCount;
_pPatterns = cr._pPatterns;
_patternCount = cr._patternCount;
_automationElementMode = cr._automationElementMode;
}
}
#endregion CacheRequest/Response
//------------------------------------------------------
//
// Other API types
//
//------------------------------------------------------
#region Other
[StructLayout(LayoutKind.Sequential)]
internal struct UiaFindParams
{
internal int MaxDepth;
internal bool FindFirst;
internal bool ExcludeRoot;
internal IntPtr pFindCondition;
};
internal enum AutomationIdType
{
Property,
Pattern,
Event,
ControlType,
TextAttribute
}
internal enum NormalizeState
{
None,
View,
Custom
}
internal const int UIA_E_ELEMENTNOTENABLED = unchecked((int)0x80040200);
internal const int UIA_E_ELEMENTNOTAVAILABLE = unchecked((int)0x80040201);
internal const int UIA_E_NOCLICKABLEPOINT = unchecked((int)0x80040202);
internal const int UIA_E_PROXYASSEMBLYNOTLOADED = unchecked((int)0x80040203);
internal delegate void UiaEventCallback(IntPtr args,
[MarshalAs(UnmanagedType.SafeArray, SafeArraySubType = VarEnum.VT_VARIANT)] object[,] pRequestedData,
[MarshalAs(UnmanagedType.BStr)] string pTreeStructure);
internal const int UiaHwndRuntimeIdBase = 42;
#endregion Other
//-----------------------------------------------------
//
// Internal Methods
//
//------------------------------------------------------
#region Internal Methods
//
// Client-side methods...
//
#region Client methods
internal static UiaCacheResponse UiaNodeFromPoint(double x, double y, UiaCacheRequest request)
{
string treeStructure;
object[,] requestedData;
// Note on marshalling of CacheRequest: The UiaCacheRequest class contains extra fields that we use in managed code
// (eg, managed versions of the arrays) that we can't marshal, so we use another class, UiaMiniCacheRequest, that contains
// just the interop stuff. This needs to contain a pointer to the condition; but since we can't embed SafeHandles in structs,
// it needs to be an IntPtr - hence the use of DangerousGetHandle here. We then use KeepAlive to ensure the condition
// (and its unmanaged alloced memory) stays around till we're done. This is necessary because we're passing it as an IntPtr
// within a struct, which is invisible to GC.
// Note that Condition isn't vulnerable to IntPtr/handle recycling issues, since Condition is immutable and is tied to the
// lifetime of the underlying object (you'd need to have a Close/Dispose equivalent in order to be vulnerable to recycling;
// without one, your handle can't become stale.)
UiaMiniCacheRequest miniCR = new UiaMiniCacheRequest(request, request._condition._safeHandle.DangerousGetHandle());
CheckError(RawUiaNodeFromPoint(x, y, miniCR, out requestedData, out treeStructure));
GC.KeepAlive(request._condition); // keep condition (and associated unmanaged memory) alive during call
return new UiaCacheResponse(requestedData, treeStructure, request);
}
internal static UiaCacheResponse UiaNodeFromFocus(UiaCacheRequest request)
{
string treeStructure;
object[,] requestedData;
UiaMiniCacheRequest miniCR = new UiaMiniCacheRequest(request, request._condition._safeHandle.DangerousGetHandle());
CheckError(RawUiaNodeFromFocus(miniCR, out requestedData, out treeStructure));
GC.KeepAlive(request._condition); // keep condition (and associated unmanaged memory) alive during call
return new UiaCacheResponse(requestedData, treeStructure, request);
}
internal static UiaCacheResponse UiaGetUpdatedCache(SafeNodeHandle hnode, UiaCacheRequest request, NormalizeState normalize, Condition customCondition)
{
string treeStructure;
object[,] requestedData;
UiaMiniCacheRequest miniCR = new UiaMiniCacheRequest(request, request._condition._safeHandle.DangerousGetHandle());
CheckError(RawUiaGetUpdatedCache(hnode, miniCR, normalize, customCondition == null ? SafeConditionMemoryHandle.NullHandle : customCondition._safeHandle, out requestedData, out treeStructure));
GC.KeepAlive(request._condition); // keep condition (and associated unmanaged memory) alive during call
return new UiaCacheResponse(requestedData, treeStructure, request);
}
internal static void UiaGetPropertyValue(SafeNodeHandle hnode, int propertyId, out object value)
{
CheckError(RawUiaGetPropertyValue(hnode, propertyId, out value));
}
internal static SafePatternHandle UiaGetPatternProvider(SafeNodeHandle hnode, int patternId)
{
SafePatternHandle hobj;
CheckError(RawUiaGetPatternProvider(hnode, patternId, out hobj));
// Whidbey RTM SafeHandle/PInvoke bug workaround - SafeHandles on 64 can come back
// as null, should be non-null but Invalid. This fixes up to non-null.
if (hobj == null)
{
hobj = new SafePatternHandle();
}
return hobj;
}
internal static int[] UiaGetRuntimeId(SafeNodeHandle hnode)
{
int[] runtimeId;
CheckError(RawUiaGetRuntimeId(hnode, out runtimeId));
return runtimeId;
}
internal static void UiaSetFocus(SafeNodeHandle hnode)
{
CheckError(RawUiaSetFocus(hnode));
}
internal static UiaCacheResponse UiaNavigate(SafeNodeHandle hnode, NavigateDirection direction, Condition condition, UiaCacheRequest request)
{
string treeStructure;
object[,] requestedData;
UiaMiniCacheRequest miniCR = new UiaMiniCacheRequest(request, request._condition._safeHandle.DangerousGetHandle());
CheckError(RawUiaNavigate(hnode, direction, condition._safeHandle, miniCR, out requestedData, out treeStructure));
GC.KeepAlive(request._condition); // keep condition (and associated unmanaged memory) alive during call
return new UiaCacheResponse(requestedData, treeStructure, request);
}
internal static UiaCacheResponse[] UiaFind(SafeNodeHandle hnode, UiaFindParams findParams, Condition findCondition, UiaCacheRequest request)
{
// The native API for this returns separate arrays of data and tree structure strings,
// one element each for each found element. After it returns, we need to merge corresponding
// entries to give a single array of UiaCacheResponse objects...
object[,] requestedData;
int[] offsets;
string[] treeStructures;
UiaMiniCacheRequest miniCR = new UiaMiniCacheRequest(request, request._condition._safeHandle.DangerousGetHandle());
findParams.pFindCondition = findCondition._safeHandle.DangerousGetHandle();
CheckError(RawUiaFind(hnode, ref findParams, miniCR, out requestedData, out offsets, out treeStructures));
GC.KeepAlive(request._condition); // keep condition (and associated unmanaged memory) alive during call
GC.KeepAlive(findCondition);
if (requestedData == null)
{
Debug.Assert(offsets == null && treeStructures == null, "if nothin found, all out params shoud be null");
return new UiaCacheResponse[] {}; // Return empty cacheresponse, not null.
}
Debug.Assert(offsets.Length == treeStructures.Length);
// Now do the actual merge...
UiaCacheResponse[] responses = new UiaCacheResponse[treeStructures.Length];
int properties = requestedData.GetLength(1);
for (int i = 0; i < treeStructures.Length; i++)
{
int startRow = offsets[i];
int endRow = i < treeStructures.Length - 1 ? offsets[i + 1] : requestedData.GetLength(0);
int elements = endRow - startRow;
object[,] elementData = new object[elements, properties];
for (int e = 0; e < elements; e++)
for (int p = 0; p < properties; p++)
elementData[e, p] = requestedData[e + startRow, p];
responses[i] = new UiaCacheResponse(elementData, treeStructures[i], request);
}
return responses;
}
internal static SafeNodeHandle UiaNodeFromHandle(IntPtr hwnd)
{
SafeNodeHandle hnode;
CheckError(RawUiaNodeFromHandle(hwnd, out hnode));
// Whidbey RTM SafeHandle/PInvoke bug workaround - SafeHandles on 64 can come back
// as null, should be non-null but Invalid. This fixes up to non-null.
if (hnode == null)
{
hnode = new SafeNodeHandle();
}
return hnode;
}
internal static SafeNodeHandle UiaGetRootNode()
{
SafeNodeHandle hnode;
CheckError(RawUiaGetRootNode(out hnode));
// Whidbey RTM SafeHandle/PInvoke bug workaround - SafeHandles on 64 can come back
// as null, should be non-null but Invalid. This fixes up to non-null.
if (hnode == null)
{
hnode = new SafeNodeHandle();
}
return hnode;
}
internal static SafeNodeHandle UiaNodeFromProvider(IRawElementProviderSimple provider)
{
SafeNodeHandle hnode;
CheckError(RawUiaNodeFromProvider(provider, out hnode));
// Whidbey RTM SafeHandle/PInvoke bug workaround - SafeHandles on 64 can come back
// as null, should be non-null but Invalid. This fixes up to non-null.
if (hnode == null)
{
hnode = new SafeNodeHandle();
}
return hnode;
}
internal static SafeNodeHandle UiaHUiaNodeFromVariant(object var)
{
SafeNodeHandle hnode;
CheckError(RawUiaHUiaNodeFromVariant(ref var, out hnode));
// Whidbey RTM SafeHandle/PInvoke bug workaround - SafeHandles on 64 can come back
// as null, should be non-null but Invalid. This fixes up to non-null.
if (hnode == null)
{
hnode = new SafeNodeHandle();
}
return hnode;
}
internal static SafePatternHandle UiaHPatternObjectFromVariant(object var)
{
SafePatternHandle hobj;
CheckError(RawUiaHPatternObjectFromVariant(ref var, out hobj));
// Whidbey RTM SafeHandle/PInvoke bug workaround - SafeHandles on 64 can come back
// as null, should be non-null but Invalid. This fixes up to non-null.
if (hobj == null)
{
hobj = new SafePatternHandle();
}
return hobj;
}
internal static SafeTextRangeHandle UiaHTextRangeFromVariant(object var)
{
SafeTextRangeHandle hobj;
CheckError(RawUiaHTextRangeFromVariant(ref var, out hobj));
// Whidbey RTM SafeHandle/PInvoke bug workaround - SafeHandles on 64 can come back
// as null, should be non-null but Invalid. This fixes up to non-null.
if (hobj == null)
{
hobj = new SafeTextRangeHandle();
}
return hobj;
}
[DllImport(DllImport.UIAutomationCore, EntryPoint = "UiaHasServerSideProvider", CharSet = CharSet.Unicode)]
internal static extern bool UiaHasServerSideProvider(IntPtr hwnd);
///
/// Critical: This code calls into the unmanaged UIAutomationCore.dll
/// TreatAsSafe: Cleanup code for releasing a resource. Sometimes a handle may be obtained by asserting full trust,
/// but then we go back to partial trust. Releasing the resource should never generate a security exception.
///
[SecurityCritical,SecurityTreatAsSafe]
internal static bool UiaNodeRelease(IntPtr hnode)
{
return RawUiaNodeRelease( hnode );
}
///
/// Critical: This code calls into the unmanaged UIAutomationCore.dll
/// TreatAsSafe: Cleanup code for releasing a resource. Sometimes a handle may be obtained by asserting full trust,
/// but then we go back to partial trust. Releasing the resource should never generate a security exception.
///
[SecurityCritical,SecurityTreatAsSafe]
internal static bool UiaPatternRelease(IntPtr hobj)
{
return RawUiaPatternRelease( hobj );
}
///
/// Critical: This code calls into the unmanaged UIAutomationCore.dll
/// TreatAsSafe: Cleanup code for releasing a resource. Sometimes a handle may be obtained by asserting full trust,
/// but then we go back to partial trust. Releasing the resource should never generate a security exception.
///
[SecurityCritical,SecurityTreatAsSafe]
internal static bool UiaTextRangeRelease(IntPtr hobj)
{
return RawUiaTextRangeRelease( hobj );
}
#endregion Client methods
//
// Event methods (client only)
//
#region Event methods
internal static SafeEventHandle UiaAddEvent(SafeNodeHandle hnode, int eventId, UiaEventCallback callback, TreeScope scope, int[] properties, UiaCacheRequest request)
{
SafeEventHandle hevent;
UiaMiniCacheRequest miniCR = new UiaMiniCacheRequest(request, request._condition._safeHandle.DangerousGetHandle());
CheckError(RawUiaAddEvent(hnode, eventId, callback, scope, properties, properties == null ? 0 : properties.Length, miniCR, out hevent));
GC.KeepAlive(request._condition); // keep condition (and associated unmanaged memory) alive during call
return hevent;
}
internal static void UiaRemoveEvent(IntPtr hevent)
{
CheckError(RawUiaRemoveEvent(hevent));
}
internal static void UiaEventAddWindow(SafeEventHandle hevent, IntPtr hwnd)
{
CheckError(RawUiaEventAddWindow(hevent, hwnd));
}
internal static void UiaEventRemoveWindow(SafeEventHandle hevent, IntPtr hwnd)
{
CheckError(RawUiaEventRemoveWindow(hevent, hwnd));
}
#endregion Event methods
//
// EventArgs translation
//
#region EventArgs translation
// Build an int[] from an array of ints in memory at the specified address
// Used to pull runtimeIDs from C/interop structs
private static int[] ArrayFromIntPtr(IntPtr pInts, int cInts)
{
if (pInts == IntPtr.Zero)
return null;
int[] array = new int[cInts];
unsafe
{
for (int i = 0; i < cInts; i++)
{
array[i] = *(((int*)pInts) + i);
}
}
return array;
}
// UiaCore calls the delegate directly, with an IntPtr for the eventArgs,
// so the managed callback has to use this to parse those unmanaged args
// into something more managable.
internal static AutomationEventArgs GetUiaEventArgs(IntPtr argsAddr)
{
UiaEventArgs args = (UiaEventArgs)Marshal.PtrToStructure(argsAddr, typeof(UiaEventArgs));
AutomationEvent eventId = AutomationEvent.LookupById(args._eventId);
if (eventId == null)
{
Debug.Assert(false, "Got unknown eventId from core: " + args._eventId);
return null;
}
switch (args._type)
{
case EventArgsType.Simple:
{
return new AutomationEventArgs(eventId);
}
case EventArgsType.PropertyChanged:
{
UiaPropertyChangedEventArgs pcargs = (UiaPropertyChangedEventArgs)Marshal.PtrToStructure(argsAddr, typeof(UiaPropertyChangedEventArgs));
AutomationProperty propertyId = AutomationProperty.LookupById(pcargs._propertyId);
if (propertyId == null)
{
Debug.Assert(false, "Got unknown propertyId from core: " + pcargs._propertyId);
return null;
}
return new AutomationPropertyChangedEventArgs(propertyId, pcargs._oldValue, pcargs._newValue);
}
case EventArgsType.StructureChanged:
{
UiaStructureChangedEventArgs scargs = (UiaStructureChangedEventArgs)Marshal.PtrToStructure(argsAddr, typeof(UiaStructureChangedEventArgs));
int[] runtimeId = ArrayFromIntPtr(scargs._pRuntimeId, scargs._cRuntimeIdLen);
return new StructureChangedEventArgs(scargs._structureChangeType, runtimeId);
}
case EventArgsType.AsyncContentLoaded:
{
UiaAsyncContentLoadedEventArgs aclargs = (UiaAsyncContentLoadedEventArgs)Marshal.PtrToStructure(argsAddr, typeof(UiaAsyncContentLoadedEventArgs));
return new AsyncContentLoadedEventArgs(aclargs._asyncContentLoadedState, aclargs._percentComplete);
}
case EventArgsType.WindowClosed:
{
UiaWindowClosedEventArgs wcargs = (UiaWindowClosedEventArgs)Marshal.PtrToStructure(argsAddr, typeof(UiaWindowClosedEventArgs));
int[] runtimeId = ArrayFromIntPtr(wcargs._pRuntimeId, wcargs._cRuntimeIdLen);
return new WindowClosedEventArgs(runtimeId);
}
}
Debug.Assert(false, "Unknown event type from core:" + args._type);
return null;
}
#endregion EventArgs translation
//
// Pattern methods...
//
#region Pattern methods
internal static void DockPattern_SetDockPosition(SafePatternHandle hobj, DockPosition dockPosition)
{
CheckError(RawDockPattern_SetDockPosition(hobj, dockPosition));
}
internal static void ExpandCollapsePattern_Collapse(SafePatternHandle hobj)
{
CheckError(RawExpandCollapsePattern_Collapse(hobj));
}
internal static void ExpandCollapsePattern_Expand(SafePatternHandle hobj)
{
CheckError(RawExpandCollapsePattern_Expand(hobj));
}
internal static SafeNodeHandle GridPattern_GetItem(SafePatternHandle hobj, int row, int column)
{
SafeNodeHandle result;
CheckError(RawGridPattern_GetItem(hobj, row, column, out result));
// Whidbey RTM SafeHandle/PInvoke bug workaround - SafeHandles on 64 can come back
// as null, should be non-null but Invalid. This fixes up to non-null.
if (result == null)
{
result = new SafeNodeHandle();
}
return result;
}
internal static void InvokePattern_Invoke(SafePatternHandle hobj)
{
CheckError(RawInvokePattern_Invoke(hobj));
}
internal static string MultipleViewPattern_GetViewName(SafePatternHandle hobj, int viewId)
{
string result;
CheckError(RawMultipleViewPattern_GetViewName(hobj, viewId, out result));
return result;
}
internal static void MultipleViewPattern_SetCurrentView(SafePatternHandle hobj, int viewId)
{
CheckError(RawMultipleViewPattern_SetCurrentView(hobj, viewId));
}
internal static void RangeValuePattern_SetValue(SafePatternHandle hobj, double val)
{
CheckError(RawRangeValuePattern_SetValue(hobj, val));
}
internal static void ScrollItemPattern_ScrollIntoView(SafePatternHandle hobj)
{
CheckError(RawScrollItemPattern_ScrollIntoView(hobj));
}
internal static void ScrollPattern_Scroll(SafePatternHandle hobj, ScrollAmount horizontalAmount, ScrollAmount verticalAmount)
{
CheckError(RawScrollPattern_Scroll(hobj, horizontalAmount, verticalAmount));
}
internal static void ScrollPattern_SetScrollPercent(SafePatternHandle hobj, double horizontalPercent, double verticalPercent)
{
CheckError(RawScrollPattern_SetScrollPercent(hobj, horizontalPercent, verticalPercent));
}
internal static void SelectionItemPattern_AddToSelection(SafePatternHandle hobj)
{
CheckError(RawSelectionItemPattern_AddToSelection(hobj));
}
internal static void SelectionItemPattern_RemoveFromSelection(SafePatternHandle hobj)
{
CheckError(RawSelectionItemPattern_RemoveFromSelection(hobj));
}
internal static void SelectionItemPattern_Select(SafePatternHandle hobj)
{
CheckError(RawSelectionItemPattern_Select(hobj));
}
internal static void TogglePattern_Toggle(SafePatternHandle hobj)
{
CheckError(RawTogglePattern_Toggle(hobj));
}
internal static void TransformPattern_Move(SafePatternHandle hobj, double x, double y)
{
CheckError(RawTransformPattern_Move(hobj, x, y));
}
internal static void TransformPattern_Resize(SafePatternHandle hobj, double width, double height)
{
CheckError(RawTransformPattern_Resize(hobj, width, height));
}
internal static void TransformPattern_Rotate(SafePatternHandle hobj, double degrees)
{
CheckError(RawTransformPattern_Rotate(hobj, degrees));
}
internal static void ValuePattern_SetValue(SafePatternHandle hobj, string pVal)
{
CheckError(RawValuePattern_SetValue(hobj, pVal));
}
internal static void WindowPattern_Close(SafePatternHandle hobj)
{
CheckError(RawWindowPattern_Close(hobj));
}
internal static void WindowPattern_SetWindowVisualState(SafePatternHandle hobj, WindowVisualState state)
{
CheckError(RawWindowPattern_SetWindowVisualState(hobj, state));
}
internal static bool WindowPattern_WaitForInputIdle(SafePatternHandle hobj, int milliseconds)
{
bool result;
CheckError(RawWindowPattern_WaitForInputIdle(hobj, milliseconds, out result));
return result;
}
#endregion Pattern methods
//
// Text methods...
//
#region Text methods
internal static SafeTextRangeHandle [] TextPattern_GetSelection(SafePatternHandle hobj)
{
object[] arr;
CheckError(RawTextPattern_GetSelection(hobj, out arr));
if (arr == null)
{
return new SafeTextRangeHandle[] { };
}
SafeTextRangeHandle[] result = new SafeTextRangeHandle[arr.Length];
for (int i = 0; i < arr.Length; i++)
{
result[i] = UiaHTextRangeFromVariant(arr[i]);
}
return result;
}
internal static SafeTextRangeHandle[] TextPattern_GetVisibleRanges(SafePatternHandle hobj)
{
object[] arr;
CheckError(RawTextPattern_GetVisibleRanges(hobj, out arr));
if (arr == null)
{
return new SafeTextRangeHandle[] { };
}
SafeTextRangeHandle[] result = new SafeTextRangeHandle[arr.Length];
for (int i = 0; i < arr.Length; i++)
{
result[i] = UiaHTextRangeFromVariant(arr[i]);
}
return result;
}
internal static SafeTextRangeHandle TextPattern_RangeFromChild(SafePatternHandle hobj, SafeNodeHandle childElement)
{
SafeTextRangeHandle result;
CheckError(RawTextPattern_RangeFromChild(hobj, childElement, out result));
// Whidbey RTM SafeHandle/PInvoke bug workaround - SafeHandles on 64 can come back
// as null, should be non-null but Invalid. This fixes up to non-null.
if (result == null)
{
result = new SafeTextRangeHandle();
}
return result;
}
internal static SafeTextRangeHandle TextPattern_RangeFromPoint(SafePatternHandle hobj, Point point)
{
SafeTextRangeHandle result;
CheckError(RawTextPattern_RangeFromPoint(hobj, point, out result));
// Whidbey RTM SafeHandle/PInvoke bug workaround - SafeHandles on 64 can come back
// as null, should be non-null but Invalid. This fixes up to non-null.
if (result == null)
{
result = new SafeTextRangeHandle();
}
return result;
}
internal static SafeTextRangeHandle TextPattern_get_DocumentRange(SafePatternHandle hobj)
{
SafeTextRangeHandle result;
CheckError(RawTextPattern_get_DocumentRange(hobj, out result));
// Whidbey RTM SafeHandle/PInvoke bug workaround - SafeHandles on 64 can come back
// as null, should be non-null but Invalid. This fixes up to non-null.
if (result == null)
{
result = new SafeTextRangeHandle();
}
return result;
}
internal static SupportedTextSelection TextPattern_get_SupportedTextSelection(SafePatternHandle hobj)
{
SupportedTextSelection result;
CheckError(RawTextPattern_get_SupportedTextSelection(hobj, out result));
return result;
}
internal static SafeTextRangeHandle TextRange_Clone(SafeTextRangeHandle hobj)
{
SafeTextRangeHandle result;
CheckError(RawTextRange_Clone(hobj, out result));
// Whidbey RTM SafeHandle/PInvoke bug workaround - SafeHandles on 64 can come back
// as null, should be non-null but Invalid. This fixes up to non-null.
if (result == null)
{
result = new SafeTextRangeHandle();
}
return result;
}
internal static bool TextRange_Compare(SafeTextRangeHandle hobj, SafeTextRangeHandle range)
{
bool result;
CheckError(RawTextRange_Compare(hobj, range, out result));
return result;
}
internal static int TextRange_CompareEndpoints(SafeTextRangeHandle hobj, TextPatternRangeEndpoint endpoint, SafeTextRangeHandle targetRange, TextPatternRangeEndpoint targetEndpoint)
{
int result;
CheckError(RawTextRange_CompareEndpoints(hobj, endpoint, targetRange, targetEndpoint, out result));
return result;
}
internal static void TextRange_ExpandToEnclosingUnit(SafeTextRangeHandle hobj, TextUnit unit)
{
CheckError(RawTextRange_ExpandToEnclosingUnit(hobj, unit));
}
internal static SafeTextRangeHandle TextRange_FindAttribute(SafeTextRangeHandle hobj, int attributeId, object val, bool backward)
{
SafeTextRangeHandle result;
CheckError(RawTextRange_FindAttribute(hobj, attributeId, val, backward, out result));
// Whidbey RTM SafeHandle/PInvoke bug workaround - SafeHandles on 64 can come back
// as null, should be non-null but Invalid. This fixes up to non-null.
if (result == null)
{
result = new SafeTextRangeHandle();
}
return result;
}
internal static SafeTextRangeHandle TextRange_FindText(SafeTextRangeHandle hobj, string text, bool backward, bool ignoreCase)
{
SafeTextRangeHandle result;
CheckError(RawTextRange_FindText(hobj, text, backward, ignoreCase, out result));
// Whidbey RTM SafeHandle/PInvoke bug workaround - SafeHandles on 64 can come back
// as null, should be non-null but Invalid. This fixes up to non-null.
if (result == null)
{
result = new SafeTextRangeHandle();
}
return result;
}
internal static object TextRange_GetAttributeValue(SafeTextRangeHandle hobj, int attributeId)
{
object result;
CheckError(RawTextRange_GetAttributeValue(hobj, attributeId, out result));
return result;
}
internal static Rect[] TextRange_GetBoundingRectangles(SafeTextRangeHandle hobj)
{
double[] doubles;
CheckError(RawTextRange_GetBoundingRectangles(hobj, out doubles));
if (doubles == null)
{
return null;
}
int count = doubles.Length / 4;
int leftover = doubles.Length % 4;
if (leftover != 0)
return null;
Rect[] rects = new Rect[count];
int scan = 0;
for (int i = 0; i < count; i++)
{
double x = doubles[scan++];
double y = doubles[scan++];
double width = doubles[scan++];
double height = doubles[scan++];
if(width <= 0 || height <= 0)
rects[i] = Rect.Empty;
else
rects[i] = new Rect(x, y, width, height);
}
return rects;
}
internal static SafeNodeHandle TextRange_GetEnclosingElement(SafeTextRangeHandle hobj)
{
SafeNodeHandle result;
CheckError(RawTextRange_GetEnclosingElement(hobj, out result));
// Whidbey RTM SafeHandle/PInvoke bug workaround - SafeHandles on 64 can come back
// as null, should be non-null but Invalid. This fixes up to non-null.
if (result == null)
{
result = new SafeNodeHandle();
}
return result;
}
internal static string TextRange_GetText(SafeTextRangeHandle hobj, int maxLength)
{
string result;
CheckError(RawTextRange_GetText(hobj, maxLength, out result));
return result;
}
internal static int TextRange_Move(SafeTextRangeHandle hobj, TextUnit unit, int count)
{
int result;
CheckError(RawTextRange_Move(hobj, unit, count, out result));
return result;
}
internal static int TextRange_MoveEndpointByUnit(SafeTextRangeHandle hobj, TextPatternRangeEndpoint endpoint, TextUnit unit, int count)
{
int result;
CheckError(RawTextRange_MoveEndpointByUnit(hobj, endpoint, unit, count, out result));
return result;
}
internal static void TextRange_MoveEndpointByRange(SafeTextRangeHandle hobj, TextPatternRangeEndpoint endpoint, SafeTextRangeHandle targetRange, TextPatternRangeEndpoint targetEndpoint)
{
CheckError(RawTextRange_MoveEndpointByRange(hobj, endpoint, targetRange, targetEndpoint));
}
internal static void TextRange_Select(SafeTextRangeHandle hobj)
{
CheckError(RawTextRange_Select(hobj));
}
internal static void TextRange_AddToSelection(SafeTextRangeHandle hobj)
{
CheckError(RawTextRange_AddToSelection(hobj));
}
internal static void TextRange_RemoveFromSelection(SafeTextRangeHandle hobj)
{
CheckError(RawTextRange_RemoveFromSelection(hobj));
}
internal static void TextRange_ScrollIntoView(SafeTextRangeHandle hobj, bool alignToTop)
{
CheckError(RawTextRange_ScrollIntoView(hobj, alignToTop));
}
internal static object[] TextRange_GetChildren(SafeTextRangeHandle hobj)
{
object[] result;
CheckError(RawTextRange_GetChildren(hobj, out result));
return result;
}
#endregion Text methods
//
// Other methods...
//
internal static bool IsErrorMarker(object val, bool throwException)
{
// Errors/exceptions in cacherequest array are represented as
// an array of two objects, the first is VT_ERROR, which maps
// to int; and the second is an VT_UNKNOWN/IErrorInfo, which
// maps to object.
object[] arr = val as object[];
if (arr == null || arr.Length != 2)
return false;
if (!(arr[0] is int))
return false;
// Exception slot can be null, or an IErrorInfo (if from local unmanaged or
// remote provider), or a CLR Exception object (if from local managed code - Exception
// implements IErrorInfo, and effectively "passes through" uiacore).
// IsComObject returns true only for non-CLR (eg. unmanaged) objects, so we have to check
// for CLR Exception objects (with "is Exception") separately.
if(arr[1] != null
&& !Marshal.IsComObject(arr[1])
&& !(arr[1] is Exception) )
return false;
if(throwException)
{
int hr = (int)arr[0];
object errorInfo = arr[1];
if (errorInfo != null)
{
// Marshal.ThrowExceptionForHR(hr, IntPtr) seems to ignore the errorInfo, but if we
// explicitly set it as a the errorInfo for this thread using SetErrorInfo, it works(!)...
// Note that the errorInfo can be null; in which case we just don't use it.
IntPtr errorInfoAsIntPtr = Marshal.GetIUnknownForObject(errorInfo);
#pragma warning suppress 6031, 6532, 56031
SetErrorInfo(0, errorInfoAsIntPtr); // ignore return value
Marshal.Release(errorInfoAsIntPtr);
}
Marshal.ThrowExceptionForHR(hr);
}
return true;
}
#endregion Internal Methods
//-----------------------------------------------------
//
// Private Methods
//
//-----------------------------------------------------
#region Private Methods
[DllImport(DllImport.UIAutomationCore, CharSet = CharSet.Unicode)]
private static extern bool UiaGetErrorDescription([MarshalAs(UnmanagedType.BStr)] out string pDescription);
[DllImport("oleaut32.dll")]
private static extern int SetErrorInfo(int dwReserved, IntPtr errorInfo);
// Check hresult for error, and handle mapping to UIA-specific
// exceptions...
private static void CheckError(int hr)
{
if (hr >= 0)
{
return;
}
// Handle these UIA exceptions specially - COM Interop
// maps others (eg. InvalidArgument), but not these:
if (hr == UIA_E_ELEMENTNOTENABLED
|| hr == UIA_E_ELEMENTNOTAVAILABLE
|| hr == UIA_E_NOCLICKABLEPOINT
|| hr == UIA_E_PROXYASSEMBLYNOTLOADED)
{
string description;
if (!UiaGetErrorDescription(out description))
description = SR.Get(SRID.UnknownCoreAPIError);
switch (hr)
{
case UIA_E_ELEMENTNOTENABLED:
throw new ElementNotEnabledException(description);
case UIA_E_ELEMENTNOTAVAILABLE:
throw new ElementNotAvailableException(description);
case UIA_E_NOCLICKABLEPOINT:
throw new NoClickablePointException(description);
case UIA_E_PROXYASSEMBLYNOTLOADED:
throw new ProxyAssemblyNotLoadedException(description);
}
}
// Not a UIA-specific exception - let COM Interop handle the rest.
// (Marshal.ThrowExceptionForHR automatically calls GetErrorInfo to fill in the description
// field - UIA sets the error info itself, so it will get propogated here.)
Marshal.ThrowExceptionForHR(hr);
}
#endregion Private Methods
#region Raw API methods
//
// Client-side methods...
//
[DllImport(DllImport.UIAutomationCore, EntryPoint = "UiaGetPropertyValue", CharSet = CharSet.Unicode)]
private static extern int RawUiaGetPropertyValue(SafeNodeHandle hnode, int propertyId, out object value);
[DllImport(DllImport.UIAutomationCore, EntryPoint = "UiaGetPatternProvider", CharSet = CharSet.Unicode)]
private static extern int RawUiaGetPatternProvider(SafeNodeHandle hnode, int patternId, out SafePatternHandle phobj);
[DllImport(DllImport.UIAutomationCore, EntryPoint = "UiaGetRuntimeId", CharSet = CharSet.Unicode)]
private static extern int RawUiaGetRuntimeId(SafeNodeHandle hnode, [MarshalAs(UnmanagedType.SafeArray)] out int[] runtimeId);
[DllImport(DllImport.UIAutomationCore, EntryPoint = "UiaSetFocus", CharSet = CharSet.Unicode)]
private static extern int RawUiaSetFocus(SafeNodeHandle hnode);
[DllImport(DllImport.UIAutomationCore, EntryPoint = "UiaNavigate", CharSet = CharSet.Unicode)]
private static extern int RawUiaNavigate(SafeNodeHandle hnode, NavigateDirection direction, SafeConditionMemoryHandle condition, UiaMiniCacheRequest pRequest, [MarshalAs(UnmanagedType.SafeArray, SafeArraySubType = VarEnum.VT_VARIANT)] out object[,] requestedData, [MarshalAs(UnmanagedType.BStr)] out string treeStructure);
[DllImport(DllImport.UIAutomationCore, EntryPoint = "UiaFind", CharSet = CharSet.Unicode)]
private static extern int RawUiaFind(SafeNodeHandle hnode, ref UiaFindParams pParams, UiaMiniCacheRequest pRequest, [MarshalAs(UnmanagedType.SafeArray)] out object[,] requestedData, [MarshalAs(UnmanagedType.SafeArray, SafeArraySubType = VarEnum.VT_I4)] out int[] offsets, [MarshalAs(UnmanagedType.SafeArray, SafeArraySubType = VarEnum.VT_BSTR)] out string[] treeStructures);
[DllImport(DllImport.UIAutomationCore, EntryPoint = "UiaNodeFromHandle", CharSet = CharSet.Unicode)]
private static extern int RawUiaNodeFromHandle(IntPtr hwnd, out SafeNodeHandle hnode);
[DllImport(DllImport.UIAutomationCore, EntryPoint = "UiaNodeFromProvider", CharSet = CharSet.Unicode)]
private static extern int RawUiaNodeFromProvider(IRawElementProviderSimple provider, out SafeNodeHandle hode);
[DllImport(DllImport.UIAutomationCore, EntryPoint = "UiaGetRootNode", CharSet = CharSet.Unicode)]
private static extern int RawUiaGetRootNode(out SafeNodeHandle hnode);
[DllImport(DllImport.UIAutomationCore, EntryPoint = "UiaNodeFromPoint", CharSet = CharSet.Unicode)]
private static extern int RawUiaNodeFromPoint(double x, double y, UiaMiniCacheRequest request, [MarshalAs(UnmanagedType.SafeArray, SafeArraySubType = VarEnum.VT_VARIANT)] out object[,] requestedData, [MarshalAs(UnmanagedType.BStr)] out string treeStructure);
[DllImport(DllImport.UIAutomationCore, EntryPoint = "UiaNodeFromFocus", CharSet = CharSet.Unicode)]
private static extern int RawUiaNodeFromFocus(UiaMiniCacheRequest pRequest, [MarshalAs(UnmanagedType.SafeArray, SafeArraySubType = VarEnum.VT_VARIANT)] out object[,] requestedData, [MarshalAs(UnmanagedType.BStr)] out string treeStructure);
[DllImport(DllImport.UIAutomationCore, EntryPoint = "UiaGetUpdatedCache", CharSet = CharSet.Unicode)]
private static extern int RawUiaGetUpdatedCache(SafeNodeHandle hnode, UiaMiniCacheRequest pRequest, NormalizeState normalizeState, SafeConditionMemoryHandle pNormalizeCondition, [MarshalAs(UnmanagedType.SafeArray, SafeArraySubType = VarEnum.VT_VARIANT)] out object[,] requestedData, [MarshalAs(UnmanagedType.BStr)] out string treeStructure);
[DllImport(DllImport.UIAutomationCore, EntryPoint = "UiaHUiaNodeFromVariant", CharSet = CharSet.Unicode)]
private static extern int RawUiaHUiaNodeFromVariant([MarshalAs(UnmanagedType.Struct)] ref object var, out SafeNodeHandle hnode);
[DllImport(DllImport.UIAutomationCore, EntryPoint = "UiaHPatternObjectFromVariant", CharSet = CharSet.Unicode)]
private static extern int RawUiaHPatternObjectFromVariant([MarshalAs(UnmanagedType.Struct)] ref object var, out SafePatternHandle hnode);
[DllImport(DllImport.UIAutomationCore, EntryPoint = "UiaHTextRangeFromVariant", CharSet = CharSet.Unicode)]
private static extern int RawUiaHTextRangeFromVariant([MarshalAs(UnmanagedType.Struct)] ref object var, out SafeTextRangeHandle hnode);
[SecurityCritical]
[SuppressUnmanagedCodeSecurity]
[DllImport(DllImport.UIAutomationCore, EntryPoint = "UiaNodeRelease", CharSet = CharSet.Unicode)]
private static extern bool RawUiaNodeRelease(IntPtr hnode);
[SecurityCritical]
[SuppressUnmanagedCodeSecurity]
[DllImport(DllImport.UIAutomationCore, EntryPoint = "UiaPatternRelease", CharSet = CharSet.Unicode)]
private static extern bool RawUiaPatternRelease(IntPtr hobj);
[SecurityCritical]
[SuppressUnmanagedCodeSecurity]
[DllImport(DllImport.UIAutomationCore, EntryPoint = "UiaTextRangeRelease", CharSet = CharSet.Unicode)]
private static extern bool RawUiaTextRangeRelease(IntPtr hobj);
// Event APIs...
[DllImport(DllImport.UIAutomationCore, EntryPoint = "UiaAddEvent", CharSet = CharSet.Unicode)]
private static extern int RawUiaAddEvent(SafeNodeHandle hnode, int eventId, UiaEventCallback callback, TreeScope scope, [MarshalAs(UnmanagedType.LPArray)] int[] pProperties, int cProperties, UiaMiniCacheRequest pRequest, out SafeEventHandle hevent);
[DllImport(DllImport.UIAutomationCore, EntryPoint = "UiaRemoveEvent", CharSet = CharSet.Unicode)]
private static extern int RawUiaRemoveEvent(IntPtr hevent);
[DllImport(DllImport.UIAutomationCore, EntryPoint = "UiaEventAddWindow", CharSet = CharSet.Unicode)]
private static extern int RawUiaEventAddWindow(SafeEventHandle hevent, IntPtr hwnd);
[DllImport(DllImport.UIAutomationCore, EntryPoint = "UiaEventRemoveWindow", CharSet = CharSet.Unicode)]
private static extern int RawUiaEventRemoveWindow(SafeEventHandle hevent, IntPtr hwnd);
#endregion Raw API methods
#region Raw Pattern methods
[DllImport(DllImport.UIAutomationCore, EntryPoint = "DockPattern_SetDockPosition", CharSet = CharSet.Unicode)]
private static extern int RawDockPattern_SetDockPosition(SafePatternHandle hobj, DockPosition dockPosition);
[DllImport(DllImport.UIAutomationCore, EntryPoint = "ExpandCollapsePattern_Collapse", CharSet = CharSet.Unicode)]
private static extern int RawExpandCollapsePattern_Collapse(SafePatternHandle hobj);
[DllImport(DllImport.UIAutomationCore, EntryPoint = "ExpandCollapsePattern_Expand", CharSet = CharSet.Unicode)]
private static extern int RawExpandCollapsePattern_Expand(SafePatternHandle hobj);
[DllImport(DllImport.UIAutomationCore, EntryPoint = "GridPattern_GetItem", CharSet = CharSet.Unicode)]
private static extern int RawGridPattern_GetItem(SafePatternHandle hobj, int row, int column, out SafeNodeHandle pResult);
[DllImport(DllImport.UIAutomationCore, EntryPoint = "InvokePattern_Invoke", CharSet = CharSet.Unicode)]
private static extern int RawInvokePattern_Invoke(SafePatternHandle hobj);
[DllImport(DllImport.UIAutomationCore, EntryPoint = "MultipleViewPattern_GetViewName", CharSet = CharSet.Unicode)]
private static extern int RawMultipleViewPattern_GetViewName(SafePatternHandle hobj, int viewId, [MarshalAs(UnmanagedType.BStr)] out string ppStr);
[DllImport(DllImport.UIAutomationCore, EntryPoint = "MultipleViewPattern_SetCurrentView", CharSet = CharSet.Unicode)]
private static extern int RawMultipleViewPattern_SetCurrentView(SafePatternHandle hobj, int viewId);
[DllImport(DllImport.UIAutomationCore, EntryPoint = "RangeValuePattern_SetValue", CharSet = CharSet.Unicode)]
private static extern int RawRangeValuePattern_SetValue(SafePatternHandle hobj, double val);
[DllImport(DllImport.UIAutomationCore, EntryPoint = "ScrollItemPattern_ScrollIntoView", CharSet = CharSet.Unicode)]
private static extern int RawScrollItemPattern_ScrollIntoView(SafePatternHandle hobj);
[DllImport(DllImport.UIAutomationCore, EntryPoint = "ScrollPattern_Scroll", CharSet = CharSet.Unicode)]
private static extern int RawScrollPattern_Scroll(SafePatternHandle hobj, ScrollAmount horizontalAmount, ScrollAmount verticalAmount);
[DllImport(DllImport.UIAutomationCore, EntryPoint = "ScrollPattern_SetScrollPercent", CharSet = CharSet.Unicode)]
private static extern int RawScrollPattern_SetScrollPercent(SafePatternHandle hobj, double horizontalPercent, double verticalPercent);
[DllImport(DllImport.UIAutomationCore, EntryPoint = "SelectionItemPattern_AddToSelection", CharSet = CharSet.Unicode)]
private static extern int RawSelectionItemPattern_AddToSelection(SafePatternHandle hobj);
[DllImport(DllImport.UIAutomationCore, EntryPoint = "SelectionItemPattern_RemoveFromSelection", CharSet = CharSet.Unicode)]
private static extern int RawSelectionItemPattern_RemoveFromSelection(SafePatternHandle hobj);
[DllImport(DllImport.UIAutomationCore, EntryPoint = "SelectionItemPattern_Select", CharSet = CharSet.Unicode)]
private static extern int RawSelectionItemPattern_Select(SafePatternHandle hobj);
[DllImport(DllImport.UIAutomationCore, EntryPoint = "TogglePattern_Toggle", CharSet = CharSet.Unicode)]
private static extern int RawTogglePattern_Toggle(SafePatternHandle hobj);
[DllImport(DllImport.UIAutomationCore, EntryPoint = "TransformPattern_Move", CharSet = CharSet.Unicode)]
private static extern int RawTransformPattern_Move(SafePatternHandle hobj, double x, double y);
[DllImport(DllImport.UIAutomationCore, EntryPoint = "TransformPattern_Resize", CharSet = CharSet.Unicode)]
private static extern int RawTransformPattern_Resize(SafePatternHandle hobj, double width, double height);
[DllImport(DllImport.UIAutomationCore, EntryPoint = "TransformPattern_Rotate", CharSet = CharSet.Unicode)]
private static extern int RawTransformPattern_Rotate(SafePatternHandle hobj, double degrees);
[DllImport(DllImport.UIAutomationCore, EntryPoint = "ValuePattern_SetValue", CharSet = CharSet.Unicode)]
private static extern int RawValuePattern_SetValue(SafePatternHandle hobj, [MarshalAs(UnmanagedType.LPWStr)] string pVal);
[DllImport(DllImport.UIAutomationCore, EntryPoint = "WindowPattern_Close", CharSet = CharSet.Unicode)]
private static extern int RawWindowPattern_Close(SafePatternHandle hobj);
[DllImport(DllImport.UIAutomationCore, EntryPoint = "WindowPattern_SetWindowVisualState", CharSet = CharSet.Unicode)]
private static extern int RawWindowPattern_SetWindowVisualState(SafePatternHandle hobj, WindowVisualState state);
[DllImport(DllImport.UIAutomationCore, EntryPoint = "WindowPattern_WaitForInputIdle", CharSet = CharSet.Unicode)]
private static extern int RawWindowPattern_WaitForInputIdle(SafePatternHandle hobj, int milliseconds, out bool pResult);
#endregion Raw Pattern methods
#region Text methods
[DllImport(DllImport.UIAutomationCore, EntryPoint = "TextPattern_GetSelection", CharSet = CharSet.Unicode)]
private static extern int RawTextPattern_GetSelection(SafePatternHandle hobj, [MarshalAs(UnmanagedType.SafeArray, SafeArraySubType = VarEnum.VT_VARIANT)]out object[] result);
[DllImport(DllImport.UIAutomationCore, EntryPoint = "TextPattern_GetVisibleRanges", CharSet = CharSet.Unicode)]
private static extern int RawTextPattern_GetVisibleRanges(SafePatternHandle hobj, [MarshalAs(UnmanagedType.SafeArray, SafeArraySubType = VarEnum.VT_VARIANT)]out object[] result);
[DllImport(DllImport.UIAutomationCore, EntryPoint = "TextPattern_RangeFromChild", CharSet = CharSet.Unicode)]
private static extern int RawTextPattern_RangeFromChild(SafePatternHandle hobj, SafeNodeHandle childElement, out SafeTextRangeHandle result);
[DllImport(DllImport.UIAutomationCore, EntryPoint = "TextPattern_RangeFromPoint", CharSet = CharSet.Unicode)]
private static extern int RawTextPattern_RangeFromPoint(SafePatternHandle hobj, Point point, out SafeTextRangeHandle result);
[DllImport(DllImport.UIAutomationCore, EntryPoint = "TextPattern_get_DocumentRange", CharSet = CharSet.Unicode)]
private static extern int RawTextPattern_get_DocumentRange(SafePatternHandle hobj, out SafeTextRangeHandle result);
[DllImport(DllImport.UIAutomationCore, EntryPoint = "TextPattern_get_SupportedTextSelection", CharSet = CharSet.Unicode)]
private static extern int RawTextPattern_get_SupportedTextSelection(SafePatternHandle hobj, out SupportedTextSelection result);
[DllImport(DllImport.UIAutomationCore, EntryPoint = "TextRange_Clone", CharSet = CharSet.Unicode)]
private static extern int RawTextRange_Clone(SafeTextRangeHandle hobj, out SafeTextRangeHandle result);
[DllImport(DllImport.UIAutomationCore, EntryPoint = "TextRange_Compare", CharSet = CharSet.Unicode)]
private static extern int RawTextRange_Compare(SafeTextRangeHandle hobj, SafeTextRangeHandle range, out bool result);
[DllImport(DllImport.UIAutomationCore, EntryPoint = "TextRange_CompareEndpoints", CharSet = CharSet.Unicode)]
private static extern int RawTextRange_CompareEndpoints(SafeTextRangeHandle hobj, TextPatternRangeEndpoint endpoint, SafeTextRangeHandle targetRange, TextPatternRangeEndpoint targetEndpoint, out int result);
[DllImport(DllImport.UIAutomationCore, EntryPoint = "TextRange_ExpandToEnclosingUnit", CharSet = CharSet.Unicode)]
private static extern int RawTextRange_ExpandToEnclosingUnit(SafeTextRangeHandle hobj, TextUnit unit);
[DllImport(DllImport.UIAutomationCore, EntryPoint = "TextRange_FindAttribute", CharSet = CharSet.Unicode)]
private static extern int RawTextRange_FindAttribute(SafeTextRangeHandle hobj, int attributeId, object val, bool backward, out SafeTextRangeHandle result);
[DllImport(DllImport.UIAutomationCore, EntryPoint = "TextRange_FindText", CharSet = CharSet.Unicode)]
private static extern int RawTextRange_FindText(SafeTextRangeHandle hobj, [MarshalAs(UnmanagedType.BStr)] string text, bool backward, bool ignoreCase, out SafeTextRangeHandle result);
[DllImport(DllImport.UIAutomationCore, EntryPoint = "TextRange_GetAttributeValue", CharSet = CharSet.Unicode)]
private static extern int RawTextRange_GetAttributeValue(SafeTextRangeHandle hobj, int attributeId, out object result);
[DllImport(DllImport.UIAutomationCore, EntryPoint = "TextRange_GetBoundingRectangles", CharSet = CharSet.Unicode)]
private static extern int RawTextRange_GetBoundingRectangles(SafeTextRangeHandle hobj, [MarshalAs(UnmanagedType.SafeArray, SafeArraySubType = VarEnum.VT_R8)] out double[] result);
[DllImport(DllImport.UIAutomationCore, EntryPoint = "TextRange_GetEnclosingElement", CharSet = CharSet.Unicode)]
private static extern int RawTextRange_GetEnclosingElement(SafeTextRangeHandle hobj, out SafeNodeHandle result);
[DllImport(DllImport.UIAutomationCore, EntryPoint = "TextRange_GetText", CharSet = CharSet.Unicode)]
private static extern int RawTextRange_GetText(SafeTextRangeHandle hobj, int maxLength, [MarshalAs(UnmanagedType.BStr)] out string result);
[DllImport(DllImport.UIAutomationCore, EntryPoint = "TextRange_Move", CharSet = CharSet.Unicode)]
private static extern int RawTextRange_Move(SafeTextRangeHandle hobj, TextUnit unit, int count, out int result);
[DllImport(DllImport.UIAutomationCore, EntryPoint = "TextRange_MoveEndpointByUnit", CharSet = CharSet.Unicode)]
private static extern int RawTextRange_MoveEndpointByUnit(SafeTextRangeHandle hobj, TextPatternRangeEndpoint endpoint, TextUnit unit, int count, out int result);
[DllImport(DllImport.UIAutomationCore, EntryPoint = "TextRange_MoveEndpointByRange", CharSet = CharSet.Unicode)]
private static extern int RawTextRange_MoveEndpointByRange(SafeTextRangeHandle hobj, TextPatternRangeEndpoint endpoint, SafeTextRangeHandle targetRange, TextPatternRangeEndpoint targetEndpoint);
[DllImport(DllImport.UIAutomationCore, EntryPoint = "TextRange_Select", CharSet = CharSet.Unicode)]
private static extern int RawTextRange_Select(SafeTextRangeHandle hobj);
[DllImport(DllImport.UIAutomationCore, EntryPoint = "TextRange_AddToSelection", CharSet = CharSet.Unicode)]
private static extern int RawTextRange_AddToSelection(SafeTextRangeHandle hobj);
[DllImport(DllImport.UIAutomationCore, EntryPoint = "TextRange_RemoveFromSelection", CharSet = CharSet.Unicode)]
private static extern int RawTextRange_RemoveFromSelection(SafeTextRangeHandle hobj);
[DllImport(DllImport.UIAutomationCore, EntryPoint = "TextRange_ScrollIntoView", CharSet = CharSet.Unicode)]
private static extern int RawTextRange_ScrollIntoView(SafeTextRangeHandle hobj, bool alignToTop);
[DllImport(DllImport.UIAutomationCore, EntryPoint = "TextRange_GetChildren", CharSet = CharSet.Unicode)]
private static extern int RawTextRange_GetChildren(SafeTextRangeHandle hobj, [MarshalAs(UnmanagedType.SafeArray, SafeArraySubType = VarEnum.VT_UNKNOWN)] out object[] result);
#endregion Text methods
//-----------------------------------------------------
//
// Private Types (Event support)
//
//------------------------------------------------------
#region Private types
// Unmanaged equivalents of the various EventArgs,
// used by GetUiaEventArgs.
private enum EventArgsType
{
Simple,
PropertyChanged,
StructureChanged,
AsyncContentLoaded,
WindowClosed
}
[StructLayout(LayoutKind.Sequential)]
private struct UiaEventArgs
{
internal EventArgsType _type;
internal int _eventId;
}
[StructLayout(LayoutKind.Sequential)]
private struct UiaPropertyChangedEventArgs
{
internal EventArgsType _type;
internal int _eventId;
internal int _propertyId;
[MarshalAs(UnmanagedType.Struct)] // UnmanagedType.Struct == use VARIANT
internal object _oldValue;
[MarshalAs(UnmanagedType.Struct)] // UnmanagedType.Struct == use VARIANT
internal object _newValue;
}
[StructLayout(LayoutKind.Sequential)]
private struct UiaStructureChangedEventArgs
{
internal EventArgsType _type;
internal int _eventId;
internal StructureChangeType _structureChangeType;
internal IntPtr _pRuntimeId;
internal int _cRuntimeIdLen;
}
[StructLayout(LayoutKind.Sequential)]
private struct UiaAsyncContentLoadedEventArgs
{
internal EventArgsType _type;
internal int _eventId;
internal AsyncContentLoadedState _asyncContentLoadedState;
internal double _percentComplete;
}
[StructLayout(LayoutKind.Sequential)]
private struct UiaWindowClosedEventArgs
{
internal EventArgsType _type;
internal int _eventId;
internal IntPtr _pRuntimeId;
internal int _cRuntimeIdLen;
}
#endregion Private types
//-----------------------------------------------------
//
// Static ctor & Proxy callback
//
//------------------------------------------------------
#region static ctor and proxy callback
private enum ProviderType
{
BaseHwnd,
Proxy,
NonClientArea,
};
[return: MarshalAs(UnmanagedType.SafeArray, SafeArraySubType = VarEnum.VT_UNKNOWN)]
private delegate IRawElementProviderSimple[] UiaProviderCallback(IntPtr hwnd, ProviderType providerType);
[DllImport(DllImport.UIAutomationCore, CharSet = CharSet.Unicode)]
private static extern void UiaRegisterProviderCallback(UiaProviderCallback pCallback);
static GCHandle _gchandle;
static UiaCoreApi()
{
UiaProviderCallback onGetProviderDelegate = new UiaProviderCallback(OnGetProvider);
_gchandle = GCHandle.Alloc(onGetProviderDelegate);
UiaRegisterProviderCallback(onGetProviderDelegate);
}
static private
IRawElementProviderSimple [] OnGetProvider(IntPtr hwnd, ProviderType providerType)
{
IRawElementProviderSimple provider;
try
{
switch (providerType)
{
case ProviderType.BaseHwnd:
provider = new HwndProxyElementProvider(NativeMethods.HWND.Cast(hwnd));
break;
case ProviderType.Proxy:
provider = ProxyManager.ProxyProviderFromHwnd(NativeMethods.HWND.Cast(hwnd), 0, UnsafeNativeMethods.OBJID_CLIENT);
break;
case ProviderType.NonClientArea:
provider = ProxyManager.GetNonClientProvider(hwnd);
break;
default:
provider = null;
break;
}
if (provider == null)
return null;
return new IRawElementProviderSimple[] { provider };
}
#pragma warning suppress 56500
catch (Exception)
{
// Must catch *all* exceptions here, even critical ones,
// since this is a callback called by unmanaged code.
// (COM interop effectively translates all exceptions into
// HR codes for COM interfaces, but here we have to do it
// manually.)
return null;
}
}
#endregion static ctor and proxy callback
}
}
// File provided for Reference Use Only by Microsoft Corporation (c) 2007.
// Copyright (c) Microsoft Corporation. All rights reserved.
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