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/****************************************************************************
**
** Copyright (C) 2017 The Qt Company Ltd.
** Contact: https://www.qt.io/licensing/
**
** This file is part of the plugins of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** Commercial License Usage
** Licensees holding valid commercial Qt licenses may use this file in
** accordance with the commercial license agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and The Qt Company. For licensing terms
** and conditions see https://www.qt.io/terms-conditions. For further
** information use the contact form at https://www.qt.io/contact-us.
**
** GNU Lesser General Public License Usage
** Alternatively, this file may be used under the terms of the GNU Lesser
** General Public License version 3 as published by the Free Software
** Foundation and appearing in the file LICENSE.LGPL3 included in the
** packaging of this file. Please review the following information to
** ensure the GNU Lesser General Public License version 3 requirements
** will be met: https://www.gnu.org/licenses/lgpl-3.0.html.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 2.0 or (at your option) the GNU General
** Public license version 3 or any later version approved by the KDE Free
** Qt Foundation. The licenses are as published by the Free Software
** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3
** included in the packaging of this file. Please review the following
** information to ensure the GNU General Public License requirements will
** be met: https://www.gnu.org/licenses/gpl-2.0.html and
** https://www.gnu.org/licenses/gpl-3.0.html.
**
** $QT_END_LICENSE$
**
****************************************************************************/
#include <QtCore/QtConfig>
#ifndef QT_NO_ACCESSIBILITY
#include "qwindowsuiatextprovider.h"
#include "qwindowsuiautils.h"
#include "qwindowscontext.h"
#include <QtGui/QAccessible>
#include <QtGui/QAccessibleInterface>
#include <QtCore/QDebug>
#include <QtCore/QString>
QT_BEGIN_NAMESPACE
using namespace QWindowsUiAutomation;
QWindowsUiaTextProvider::QWindowsUiaTextProvider(QAccessible::Id id) :
QWindowsUiaBaseProvider(id)
{
}
QWindowsUiaTextProvider::~QWindowsUiaTextProvider()
{
}
HRESULT STDMETHODCALLTYPE QWindowsUiaTextProvider::QueryInterface(REFIID iid, LPVOID *iface)
{
qCDebug(lcQpaUiAutomation) << __FUNCTION__ << this;
if (!iface)
return E_INVALIDARG;
*iface = nullptr;
const bool result = qWindowsComQueryUnknownInterfaceMulti<ITextProvider>(this, iid, iface)
|| qWindowsComQueryInterface<ITextProvider>(this, iid, iface)
|| qWindowsComQueryInterface<ITextProvider2>(this, iid, iface);
return result ? S_OK : E_NOINTERFACE;
}
// Returns an array of providers for the selected text ranges.
HRESULT STDMETHODCALLTYPE QWindowsUiaTextProvider::GetSelection(SAFEARRAY **pRetVal)
{
qCDebug(lcQpaUiAutomation) << __FUNCTION__ << this;
if (!pRetVal)
return E_INVALIDARG;
*pRetVal = nullptr;
QAccessibleInterface *accessible = accessibleInterface();
if (!accessible)
return UIA_E_ELEMENTNOTAVAILABLE;
QAccessibleTextInterface *textInterface = accessible->textInterface();
if (!textInterface)
return UIA_E_ELEMENTNOTAVAILABLE;
int selCount = textInterface->selectionCount();
if (selCount > 0) {
// Build a safe array with the text range providers.
if ((*pRetVal = SafeArrayCreateVector(VT_UNKNOWN, 0, selCount))) {
for (LONG i = 0; i < selCount; ++i) {
int startOffset = 0, endOffset = 0;
textInterface->selection((int)i, &startOffset, &endOffset);
QWindowsUiaTextRangeProvider *textRangeProvider = new QWindowsUiaTextRangeProvider(id(), startOffset, endOffset);
SafeArrayPutElement(*pRetVal, &i, static_cast<IUnknown *>(textRangeProvider));
textRangeProvider->Release();
}
}
} else {
// If there is no selection, we return an array with a single degenerate (empty) text range at the cursor position.
if ((*pRetVal = SafeArrayCreateVector(VT_UNKNOWN, 0, 1))) {
LONG i = 0;
int cursorPosition = textInterface->cursorPosition();
QWindowsUiaTextRangeProvider *textRangeProvider = new QWindowsUiaTextRangeProvider(id(), cursorPosition, cursorPosition);
SafeArrayPutElement(*pRetVal, &i, static_cast<IUnknown *>(textRangeProvider));
textRangeProvider->Release();
}
}
return S_OK;
}
// Returns an array of providers for the visible text ranges.
HRESULT STDMETHODCALLTYPE QWindowsUiaTextProvider::GetVisibleRanges(SAFEARRAY **pRetVal)
{
qCDebug(lcQpaUiAutomation) << __FUNCTION__ << this;
if (!pRetVal)
return E_INVALIDARG;
*pRetVal = nullptr;
QAccessibleInterface *accessible = accessibleInterface();
if (!accessible)
return UIA_E_ELEMENTNOTAVAILABLE;
QAccessibleTextInterface *textInterface = accessible->textInterface();
if (!textInterface)
return UIA_E_ELEMENTNOTAVAILABLE;
// Considering the entire text as visible.
if ((*pRetVal = SafeArrayCreateVector(VT_UNKNOWN, 0, 1))) {
LONG i = 0;
QWindowsUiaTextRangeProvider *textRangeProvider = new QWindowsUiaTextRangeProvider(id(), 0, textInterface->characterCount());
SafeArrayPutElement(*pRetVal, &i, static_cast<IUnknown *>(textRangeProvider));
textRangeProvider->Release();
}
return S_OK;
}
HRESULT STDMETHODCALLTYPE QWindowsUiaTextProvider::RangeFromChild(IRawElementProviderSimple * /*childElement*/,
ITextRangeProvider **pRetVal)
{
qCDebug(lcQpaUiAutomation) << __FUNCTION__ << this;
if (!pRetVal)
return E_INVALIDARG;
*pRetVal = nullptr;
// No children supported.
return S_OK;
}
// Returns a degenerate text range at the specified point.
HRESULT STDMETHODCALLTYPE QWindowsUiaTextProvider::RangeFromPoint(UiaPoint point, ITextRangeProvider **pRetVal)
{
qCDebug(lcQpaUiAutomation) << __FUNCTION__ << this;
if (!pRetVal)
return E_INVALIDARG;
*pRetVal = nullptr;
QAccessibleInterface *accessible = accessibleInterface();
if (!accessible)
return UIA_E_ELEMENTNOTAVAILABLE;
QAccessibleTextInterface *textInterface = accessible->textInterface();
if (!textInterface)
return UIA_E_ELEMENTNOTAVAILABLE;
QWindow *window = windowForAccessible(accessible);
if (!window)
return UIA_E_ELEMENTNOTAVAILABLE;
QPoint pt;
nativeUiaPointToPoint(point, window, &pt);
int offset = textInterface->offsetAtPoint(pt);
if ((offset >= 0) && (offset < textInterface->characterCount())) {
*pRetVal = new QWindowsUiaTextRangeProvider(id(), offset, offset);
}
return S_OK;
}
// Returns a text range provider for the entire text.
HRESULT STDMETHODCALLTYPE QWindowsUiaTextProvider::get_DocumentRange(ITextRangeProvider **pRetVal)
{
qCDebug(lcQpaUiAutomation) << __FUNCTION__ << this;
if (!pRetVal)
return E_INVALIDARG;
*pRetVal = nullptr;
QAccessibleInterface *accessible = accessibleInterface();
if (!accessible)
return UIA_E_ELEMENTNOTAVAILABLE;
QAccessibleTextInterface *textInterface = accessible->textInterface();
if (!textInterface)
return UIA_E_ELEMENTNOTAVAILABLE;
*pRetVal = new QWindowsUiaTextRangeProvider(id(), 0, textInterface->characterCount());
return S_OK;
}
// Currently supporting single selection.
HRESULT STDMETHODCALLTYPE QWindowsUiaTextProvider::get_SupportedTextSelection(SupportedTextSelection *pRetVal)
{
qCDebug(lcQpaUiAutomation) << __FUNCTION__ << this;
if (!pRetVal)
return E_INVALIDARG;
*pRetVal = SupportedTextSelection_Single;
return S_OK;
}
// Not supporting annotations.
HRESULT STDMETHODCALLTYPE QWindowsUiaTextProvider::RangeFromAnnotation(IRawElementProviderSimple * /*annotationElement*/, ITextRangeProvider **pRetVal)
{
qCDebug(lcQpaUiAutomation) << __FUNCTION__ << this;
if (!pRetVal)
return E_INVALIDARG;
*pRetVal = nullptr;
return S_OK;
}
HRESULT STDMETHODCALLTYPE QWindowsUiaTextProvider::GetCaretRange(BOOL *isActive, ITextRangeProvider **pRetVal)
{
qCDebug(lcQpaUiAutomation) << __FUNCTION__ << this;
if (!isActive || !pRetVal)
return E_INVALIDARG;
*isActive = FALSE;
*pRetVal = nullptr;
QAccessibleInterface *accessible = accessibleInterface();
if (!accessible)
return UIA_E_ELEMENTNOTAVAILABLE;
QAccessibleTextInterface *textInterface = accessible->textInterface();
if (!textInterface)
return UIA_E_ELEMENTNOTAVAILABLE;
*isActive = accessible->state().focused;
int cursorPosition = textInterface->cursorPosition();
*pRetVal = new QWindowsUiaTextRangeProvider(id(), cursorPosition, cursorPosition);
return S_OK;
}
QT_END_NAMESPACE
#endif // QT_NO_ACCESSIBILITY
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