Add core accessibility

This commit adds the basics to bridge the blink
accessibility classes to QAccessibleInterfaces.

Note that it needs two follow up commits to implement the bridging from
the QWidget/Qt Quick worlds.

[ChangeLog][Accessibility] QtWebEngine now has accessibility
support, enabling assistive technology such as screen readers to work
with it.

Change-Id: Ied1d97e61a024115ac7a9245331211f6d9fac1b4
Reviewed-by: Zeno Albisser <zeno.albisser@digia.com>
Reviewed-by: Andras Becsi <andras.becsi@digia.com>

1 files changed, 83 insertions, 0 deletions

diff --git a/src/core/browser_accessibility_qt.h b/src/core/browser_accessibility_qt.h
new file mode 100644
index 000000000..839fedeb8
--- /dev/null
+++ b/src/core/browser_accessibility_qt.h
@@ -0,0 +1,83 @@
+/****************************************************************************
+**
+** Copyright (C) 2014 Digia Plc and/or its subsidiary(-ies).
+** Contact: http://www.qt-project.org/legal
+**
+** This file is part of the QtWebEngine module 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 Digia.  For licensing terms and
+** conditions see http://qt.digia.com/licensing.  For further information
+** use the contact form at http://qt.digia.com/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 2.1 as published by the Free Software
+** Foundation and appearing in the file LICENSE.LGPL included in the
+** packaging of this file.  Please review the following information to
+** ensure the GNU Lesser General Public License version 2.1 requirements
+** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
+**
+** In addition, as a special exception, Digia gives you certain additional
+** rights.  These rights are described in the Digia Qt LGPL Exception
+** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 3.0 as published by the Free Software
+** Foundation and appearing in the file LICENSE.GPL included in the
+** packaging of this file.  Please review the following information to
+** ensure the GNU General Public License version 3.0 requirements will be
+** met: http://www.gnu.org/copyleft/gpl.html.
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#ifndef BROWSER_ACCESSIBILITY_QT_H
+#define BROWSER_ACCESSIBILITY_QT_H
+
+#include <QtGui/qaccessible.h>
+#include "content/browser/accessibility/browser_accessibility.h"
+
+namespace content {
+
+class BrowserAccessibilityQt
+    : public BrowserAccessibility
+    , public QAccessibleInterface
+{
+public:
+    BrowserAccessibilityQt();
+
+    // QAccessibleInterface
+    virtual bool isValid() const Q_DECL_OVERRIDE;
+    virtual QObject *object() const Q_DECL_OVERRIDE;
+    virtual QAccessibleInterface *childAt(int x, int y) const Q_DECL_OVERRIDE;
+
+    // navigation, hierarchy
+    virtual QAccessibleInterface *parent() const Q_DECL_OVERRIDE;
+    virtual QAccessibleInterface *child(int index) const Q_DECL_OVERRIDE;
+    virtual int childCount() const Q_DECL_OVERRIDE;
+    virtual int indexOfChild(const QAccessibleInterface *) const Q_DECL_OVERRIDE;
+
+    // properties and state
+    virtual QString text(QAccessible::Text t) const Q_DECL_OVERRIDE;
+    virtual void setText(QAccessible::Text t, const QString &text) Q_DECL_OVERRIDE;
+    virtual QRect rect() const Q_DECL_OVERRIDE;
+    virtual QAccessible::Role role() const Q_DECL_OVERRIDE;
+    virtual QAccessible::State state() const Q_DECL_OVERRIDE;
+
+    // BrowserAccessible
+    void NativeAddReference() Q_DECL_OVERRIDE;
+    void NativeReleaseReference() Q_DECL_OVERRIDE;
+    bool IsNative() const Q_DECL_OVERRIDE { return true; }
+};
+
+}
+
+#endif