public override UiaCore.ITextRangeProvider[]? GetVisibleRanges()
{
if (!_owningTextBoxBase.IsHandleCreated)
{
return(null);
}
GetVisibleRangePoints(out int start, out int end);
var internalAccessibleObject = new InternalAccessibleObject(_owningTextBoxBase.AccessibilityObject);
return(new UiaCore.ITextRangeProvider[] { new UiaTextRange(internalAccessibleObject, this, start, end) });
}
public override UiaCore.ITextRangeProvider[]? GetSelection()
{
if (!_owningTextBoxBase.IsHandleCreated)
{
return(null);
}
// First caret position of a selected text
int start = 0;
// Last caret position of a selected text
int end = 0;
// Returns info about the selected text range.
// If there is no selection, start and end parameters are the position of the caret.
SendMessageW(_owningTextBoxBase, (WM)EM.GETSEL, ref start, ref end);
var internalAccessibleObject = new InternalAccessibleObject(_owningTextBoxBase.AccessibilityObject);
return(new UiaCore.ITextRangeProvider[] { new UiaTextRange(internalAccessibleObject, this, start, end) });
}
public override UiaCore.ITextRangeProvider?GetCaretRange(out BOOL isActive)
{
isActive = BOOL.FALSE;
if (!_owningComboBox.IsHandleCreated)
{
return(null);
}
object?hasKeyboardFocus = _owningComboBox.ChildEditAccessibleObject.GetPropertyValue(UiaCore.UIA.HasKeyboardFocusPropertyId);
if (hasKeyboardFocus is true)
{
isActive = BOOL.TRUE;
}
var internalAccessibleObject = new InternalAccessibleObject(_owningComboBox.ChildEditAccessibleObject);
return(new UiaTextRange(internalAccessibleObject, this, _owningComboBox.SelectionStart, _owningComboBox.SelectionStart));
}
private void WmGetObject(ref Message m)
{
Debug.WriteLineIf(CompModSwitches.MSAA.TraceInfo, "In WmGetObject, this = " + GetType().FullName + ", lParam = " + m.LParam.ToString());
if (m.Msg == (int)User32.WM.GETOBJECT && m.LParam == (IntPtr)NativeMethods.UiaRootObjectId)
{
// If the requested object identifier is UiaRootObjectId,
// we should return an UI Automation provider using the UiaReturnRawElementProvider function.
InternalAccessibleObject intAccessibleObject = new InternalAccessibleObject(AccessibilityObject);
m.Result = UiaCore.UiaReturnRawElementProvider(
new HandleRef(this, Handle),
m.WParam,
m.LParam,
intAccessibleObject);
return;
}
// some accessible object requested that we don't care about, so do default message processing
DefWndProc(ref m);
}
private void WmGetObject(ref Message m) {
// See "How to Handle WM_GETOBJECT" in MSDN
//
if (NativeMethods.OBJID_CLIENT == unchecked((int)(long)m.LParam)) {
// 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;
UnsafeNativeMethods.IAccessibleInternal iacc = null;
if (_accessibilityObject == null) {
IntSecurity.UnmanagedCode.Assert();
try {
wfAccessibleObject = new ChildAccessibleObject(_owner, Handle);
_accessibilityObject = new InternalAccessibleObject(wfAccessibleObject);
}
finally {
CodeAccessPermission.RevertAssert();
}
}
iacc = (UnsafeNativeMethods.IAccessibleInternal)_accessibilityObject;
// Obtain the Lresult
//
punkAcc = Marshal.GetIUnknownForObject(iacc);
IntSecurity.UnmanagedCode.Assert();
try {
m.Result = UnsafeNativeMethods.LresultFromObject(ref IID_IAccessible, m.WParam, new HandleRef(this, punkAcc));
}
finally {
CodeAccessPermission.RevertAssert();
Marshal.Release(punkAcc);
}
}
catch (Exception e) {
throw new InvalidOperationException(SR.GetString(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);
}
}
private void WmGetObject(ref Message m)
{
if (-4 == ((int) ((long) m.LParam)))
{
Guid refiid = new Guid("{618736E0-3C3D-11CF-810C-00AA00389B71}");
try
{
AccessibleObject accessibleImplemention = null;
if (this._accessibilityObject == null)
{
System.Windows.Forms.IntSecurity.UnmanagedCode.Assert();
try
{
accessibleImplemention = new ComboBox.ChildAccessibleObject(this._owner, base.Handle);
this._accessibilityObject = new InternalAccessibleObject(accessibleImplemention);
}
finally
{
CodeAccessPermission.RevertAssert();
}
}
IntPtr iUnknownForObject = Marshal.GetIUnknownForObject(this._accessibilityObject);
System.Windows.Forms.IntSecurity.UnmanagedCode.Assert();
try
{
m.Result = System.Windows.Forms.UnsafeNativeMethods.LresultFromObject(ref refiid, m.WParam, new HandleRef(this, iUnknownForObject));
}
finally
{
CodeAccessPermission.RevertAssert();
Marshal.Release(iUnknownForObject);
}
return;
}
catch (Exception exception)
{
throw new InvalidOperationException(System.Windows.Forms.SR.GetString("RichControlLresult"), exception);
}
}
base.DefWndProc(ref m);
}