public static string GetRoleText(AccessibilityRole role)
{
var sb = new StringBuilder(1024);
var length = Oleacc.GetRoleText(role, sb, 1024);
return(sb.ToString());
}
public static string GetStateBitText(AccessibilityState state)
{
var sb = new StringBuilder(1024);
var length = Oleacc.GetStateText(state, sb, 1024);
return(sb.ToString());
}
/// <summary>
/// 指定ウィンドウのウェブブラウザ情報を取得する
/// </summary>
/// <param name="hWnd">ウィンドウハンドル</param>
/// <returns>ウェブブラウザ情報</returns>
private IWebBrowser2 GetWebBrowser(IntPtr hWnd)
{
UIntPtr sendMessageResult = UIntPtr.Zero;
// WM_HTML_GETOBJECTメッセージの送信
User32.SendMessageTimeout(hWnd, HtmlGetObject, 0, 0, (uint)SMTO.ABORTIFHUNG, 1000, ref sendMessageResult);
if (sendMessageResult == UIntPtr.Zero)
{
return(null);
}
// HTML文書情報の取得
IHTMLDocument2 doc = null;
var IID_IHTMLDocument3 = typeof(IHTMLDocument3).GUID;
if (Oleacc.ObjectFromLresult(sendMessageResult, ref IID_IHTMLDocument3, 0, ref doc) != 0)
{
return(null);
}
using (Disposable.Create(() => ReleaseComObject(doc)))
{
// ウェブブラウザの取得
var serviceProvider = (Interop.Win32.IServiceProvider)doc.parentWindow;
using (Disposable.Create(() => ReleaseComObject(serviceProvider)))
{
object result;
serviceProvider.QueryService(typeof(IWebBrowserApp).GUID, typeof(IWebBrowser2).GUID, out result);
return((IWebBrowser2)result);
}
}
}
private void WmGetObject(ref Message m)
{
if (m.LParamInternal == NativeMethods.UiaRootObjectId)
{
// If the requested object identifier is UiaRootObjectId,
// we should return an UI Automation provider using the UiaReturnRawElementProvider function.
m.ResultInternal = UiaCore.UiaReturnRawElementProvider(
this,
m.WParamInternal,
m.LParamInternal,
GetChildAccessibleObject(_childWindowType));
return;
}
// See "How to Handle WM_GETOBJECT" in MSDN
if ((int)m.LParamInternal == OBJID.CLIENT)
{
// Get the IAccessible GUID
Guid IID_IAccessible = new Guid(NativeMethods.uuid_IAccessible);
// Get an Lresult for the accessibility Object for this control
try
{
// Obtain the Lresult
IntPtr pUnknown = Marshal.GetIUnknownForObject(GetChildAccessibleObject(_childWindowType));
try
{
m.ResultInternal = Oleacc.LresultFromObject(ref IID_IAccessible, m.WParamInternal, new HandleRef(this, pUnknown));
}
finally
{
Marshal.Release(pUnknown);
}
}
catch (Exception e)
{
throw new InvalidOperationException(SR.RichControlLresult, e);
}
}
else
{ // m.lparam != OBJID_CLIENT, so do default message processing
DefWndProc(ref m);
}
}
private void WmGetObject(ref Message m)
{
if (m.LParam == (IntPtr)NativeMethods.UiaRootObjectId)
{
AccessibleObject uiaProvider = GetChildAccessibleObject(_childWindowType);
// If the requested object identifier is UiaRootObjectId,
// we should return an UI Automation provider using the UiaReturnRawElementProvider function.
InternalAccessibleObject internalAccessibleObject = new InternalAccessibleObject(uiaProvider);
m.Result = UiaCore.UiaReturnRawElementProvider(
new HandleRef(this, Handle),
m.WParam,
m.LParam,
internalAccessibleObject);
return;
}
// See "How to Handle WM_GETOBJECT" in MSDN
//
if (unchecked ((int)(long)m.LParam) == OBJID.CLIENT)
{
// Get the IAccessible GUID
//
Guid IID_IAccessible = new Guid(NativeMethods.uuid_IAccessible);
// Get an Lresult for the accessibility Object for this control
//
IntPtr punkAcc;
try
{
AccessibleObject wfAccessibleObject = null;
UiaCore.IAccessibleInternal iacc = null;
if (_accessibilityObject is null)
{
wfAccessibleObject = GetChildAccessibleObject(_childWindowType);
_accessibilityObject = new InternalAccessibleObject(wfAccessibleObject);
}
iacc = (UiaCore.IAccessibleInternal)_accessibilityObject;
// Obtain the Lresult
//
punkAcc = Marshal.GetIUnknownForObject(iacc);
try
{
m.Result = Oleacc.LresultFromObject(ref IID_IAccessible, m.WParam, new HandleRef(this, punkAcc));
}
finally
{
Marshal.Release(punkAcc);
}
}
catch (Exception e)
{
throw new InvalidOperationException(SR.RichControlLresult, e);
}
}
else
{ // m.lparam != OBJID_CLIENT, so do default message processing
DefWndProc(ref m);
}
}
private void WmGetObject(ref Message m)
{
if (m.LParam == (IntPtr)NativeMethods.UiaRootObjectId &&
// Managed UIAutomation providers are supplied for child list windows but not for the child edit window.
// Child list accessibility object provides all necessary patterns and UIAutomation notifications,
// so there is no need to native provider supplement.
// Child edit accessibility object has only partial support of edit box accessibility, most of the patterns
// and notifications for child edit window are supplied by native providers, so here is no need to
// override root UIA object for child edit window.
(_childWindowType == ChildWindowType.ListBox || _childWindowType == ChildWindowType.DropDownList))
{
AccessibleObject uiaProvider = GetChildAccessibleObject(_childWindowType);
// If the requested object identifier is UiaRootObjectId,
// we should return an UI Automation provider using the UiaReturnRawElementProvider function.
InternalAccessibleObject internalAccessibleObject = new InternalAccessibleObject(uiaProvider);
m.Result = UiaCore.UiaReturnRawElementProvider(
new HandleRef(this, Handle),
m.WParam,
m.LParam,
internalAccessibleObject);
return;
}
// See "How to Handle WM_GETOBJECT" in MSDN
//
if (unchecked ((int)(long)m.LParam) == OBJID.CLIENT)
{
// Get the IAccessible GUID
//
Guid IID_IAccessible = new Guid(NativeMethods.uuid_IAccessible);
// Get an Lresult for the accessibility Object for this control
//
IntPtr punkAcc;
try
{
AccessibleObject wfAccessibleObject = null;
UiaCore.IAccessibleInternal iacc = null;
if (_accessibilityObject is null)
{
wfAccessibleObject = GetChildAccessibleObject(_childWindowType);
_accessibilityObject = new InternalAccessibleObject(wfAccessibleObject);
}
iacc = (UiaCore.IAccessibleInternal)_accessibilityObject;
// Obtain the Lresult
//
punkAcc = Marshal.GetIUnknownForObject(iacc);
try
{
m.Result = Oleacc.LresultFromObject(ref IID_IAccessible, m.WParam, new HandleRef(this, punkAcc));
}
finally
{
Marshal.Release(punkAcc);
}
}
catch (Exception e)
{
throw new InvalidOperationException(SR.RichControlLresult, e);
}
}
else
{ // m.lparam != OBJID_CLIENT, so do default message processing
DefWndProc(ref m);
}
}
