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#include "qaccessibleobject.h"

#ifndef QT_NO_ACCESSIBILITY

#include "qapplication.h"

#include "qwidget.h"

#include "qpointer.h"

#include "qmetaobject.h"

#include "qvarlengtharray.h"

QT_BEGIN_NAMESPACE

class QAccessibleObjectPrivate

{

public:

    QPointer<QObject> object;

    QList<QByteArray> actionList() const;

};

QList<QByteArray> QAccessibleObjectPrivate::actionList() const

{

    QList<QByteArray> actionList;

    if (!object)

        return actionList;

    const QMetaObject *mo = object->metaObject();

    Q_ASSERT(mo);

    QByteArray defaultAction = QMetaObject::normalizedSignature(

        mo->classInfo(mo->indexOfClassInfo("DefaultSlot")).value());

    for (int i = 0; i < mo->methodCount(); ++i) {

        const QMetaMethod member = mo->method(i);

        if (member.methodType() != QMetaMethod::Slot && member.access() != QMetaMethod::Public)

            continue;

        if (!qstrcmp(member.tag(), "QACCESSIBLE_SLOT")) {

            if (member.signature() == defaultAction)

                actionList.prepend(defaultAction);

            else

                actionList << member.signature();

        }

    }

    return actionList;

}

/*!

    \class QAccessibleObject

    \brief The QAccessibleObject class implements parts of the

    QAccessibleInterface for QObjects.

    \ingroup accessibility

    This class is mainly provided for convenience. All subclasses of

    the QAccessibleInterface that provide implementations of non-widget objects

    should use this class as their base class.

    \sa QAccessible, QAccessibleWidget

*/

/*!

    Creates a QAccessibleObject for \a object.

*/

QAccessibleObject::QAccessibleObject(QObject *object)

{

    d = new QAccessibleObjectPrivate;

    d->object = object;

}

/*!

    Destroys the QAccessibleObject.

    This only happens when a call to release() decrements the internal

    reference counter to zero.

*/

QAccessibleObject::~QAccessibleObject()

{

    delete d;

}

/*!

    \reimp

*/

QObject *QAccessibleObject::object() const

{

#ifndef QT_NO_DEBUG

    if (!d->object)

        qWarning("QAccessibleInterface is invalid. Crash pending...");

#endif

    return d->object;

}

/*!

    \reimp

*/

bool QAccessibleObject::isValid() const

{

    return !d->object.isNull();

}

/*! \reimp */

QRect QAccessibleObject::rect(int) const

{

    return QRect();

}

/*! \reimp */

void QAccessibleObject::setText(Text, int, const QString &)

{

}

/*! \reimp */

int QAccessibleObject::userActionCount(int) const

{

    return 0;

}

/*! \reimp */

bool QAccessibleObject::doAction(int, int, const QVariantList &)

{

    return false;

}

static const char * const action_text[][5] =

{

    // Name, Description, Value, Help, Accelerator

    { "Press", "", "", "", "Space" },

    { "SetFocus", "Passes focus to this widget", "", "", "" },

    { "Increase", "", "", "", "" },

    { "Decrease", "", "", "", "" },

    { "Accept", "", "", "", "" },

    { "Cancel", "", "", "", "" },

    { "Select", "", "", "", "" },

    { "ClearSelection", "", "", "", "" },

    { "RemoveSelection", "", "", "", "" },

    { "ExtendSelection", "", "", "", "" },

    { "AddToSelection", "", "", "", "" }

};

/*! \reimp */

QString QAccessibleObject::actionText(int action, Text t, int child) const

{

    if (child || action > FirstStandardAction || action < LastStandardAction || t > Accelerator)

        return QString();

    return QString::fromLatin1(action_text[-(action - FirstStandardAction)][t]);

}

/*!

    \class QAccessibleApplication

    \brief The QAccessibleApplication class implements the QAccessibleInterface for QApplication.

    \internal

    \ingroup accessibility

*/

/*!

    Creates a QAccessibleApplication for the QApplication object referenced by qApp.

*/

QAccessibleApplication::QAccessibleApplication()

: QAccessibleObject(qApp)

{

}

// all toplevel widgets except popups and the desktop

static QWidgetList topLevelWidgets()

{

    QWidgetList list;

    const QWidgetList tlw(QApplication::topLevelWidgets());

    for (int i = 0; i < tlw.count(); ++i) {

        QWidget *w = tlw.at(i);

        if (!(w->windowType() == Qt::Popup) && !(w->windowType() == Qt::Desktop))

            list.append(w);

    }

    return list;

}

/*! \reimp */

int QAccessibleApplication::childCount() const

{

    return topLevelWidgets().count();

}

/*! \reimp */

int QAccessibleApplication::indexOfChild(const QAccessibleInterface *child) const

{

    if (!child->object()->isWidgetType())

        return -1;

    const QWidgetList tlw(topLevelWidgets());

    int index = tlw.indexOf(static_cast<QWidget*>(child->object()));

    if (index != -1)

        ++index;

    return index;

}

/*! \reimp */

int QAccessibleApplication::childAt(int x, int y) const

{

    const QWidgetList tlw(topLevelWidgets());

    for (int i = 0; i < tlw.count(); ++i) {

        QWidget *w = tlw.at(i);

        if (w->frameGeometry().contains(x,y))

            return i+1;

    }

    return -1;

}

/*! \reimp */

QAccessible::Relation QAccessibleApplication::relationTo(int child, const

        QAccessibleInterface *other, int otherChild) const

{

    QObject *o = other ? other->object() : 0;

    if (!o)

        return Unrelated;

    if(o == object()) {

        if (child && !otherChild)

            return Child;

        if (!child && otherChild)

            return Ancestor;

        if (!child && !otherChild)

            return Self;

    }

    QWidgetList tlw(topLevelWidgets());

    if (tlw.contains(qobject_cast<QWidget*>(o)))

        return Ancestor;

    for (int i = 0; i < tlw.count(); ++i) {

        QWidget *w = tlw.at(i);

        QObjectList cl = qFindChildren<QObject *>(w, QString());

        if (cl.contains(o))

            return Ancestor;

    }

    return Unrelated;

}

/*! \reimp */

int QAccessibleApplication::navigate(RelationFlag relation, int entry,

                                     QAccessibleInterface **target) const

{

    if (!target)

        return -1;

    *target = 0;

    QObject *targetObject = 0;

    switch (relation) {

    case Self:

        targetObject = object();

        break;

    case Child:

        if (entry > 0 && entry <= childCount()) {

            const QWidgetList tlw(topLevelWidgets());

            if (tlw.count() >= entry)

                targetObject = tlw.at(entry-1);

        } else {

            return -1;

        }

        break;

    case FocusChild:

        targetObject = QApplication::activeWindow();

        break;

    default:

        break;

    }

    *target = QAccessible::queryAccessibleInterface(targetObject);

    return *target ? 0 : -1;

}

/*! \reimp */

QString QAccessibleApplication::text(Text t, int) const

{

    switch (t) {

    case Name:

        if (QApplication::activeWindow())

            return QApplication::activeWindow()->windowTitle();

        break;

    case Description:

        return QApplication::applicationFilePath();

    default:

        break;

    }

    return QString();

}

/*! \reimp */

QAccessible::Role QAccessibleApplication::role(int) const

{

    return Application;

}

/*! \reimp */

QAccessible::State QAccessibleApplication::state(int) const

{

    return QApplication::activeWindow() ? Focused : Normal;

}

/*! \reimp */

int QAccessibleApplication::userActionCount(int) const

{

    return 1;

}

/*! \reimp */

bool QAccessibleApplication::doAction(int action, int child, const QVariantList &param)

{

    if (action == 0 || action == 1) {

        QWidget *w = 0;

        w = QApplication::activeWindow();

        if (!w)

            w = topLevelWidgets().at(0);

        if (!w)

            return false;

        w->activateWindow();

        return true;

    }

    return QAccessibleObject::doAction(action, child, param);

}

/*! \reimp */

QString QAccessibleApplication::actionText(int action, Text text, int child) const

{

    QString str;

    if ((action == 0 || action == 1) && !child) switch (text) {

    case Name:

        return QApplication::tr("Activate");

    case Description:

        return QApplication::tr("Activates the program's main window");

    default:

        break;

    }

    return QAccessibleObject::actionText(action, text, child);

}

// ### Qt 5: remove me - binary compatibility hack

QAccessibleObjectEx::QAccessibleObjectEx(QObject *object)

{

    d = new QAccessibleObjectPrivate;

    d->object = object;

}

bool QAccessibleObjectEx::isValid() const

{ return reinterpret_cast<const QAccessibleObject *>(this)->QAccessibleObject::isValid(); }

QObject *QAccessibleObjectEx::object() const

{ return reinterpret_cast<const QAccessibleObject *>(this)->QAccessibleObject::object(); }

QRect QAccessibleObjectEx::rect(int child) const

{ return reinterpret_cast<const QAccessibleObject *>(this)->QAccessibleObject::rect(child); }

void QAccessibleObjectEx::setText(Text t, int child, const QString &text)

{ reinterpret_cast<QAccessibleObject *>(this)->QAccessibleObject::setText(t, child, text); }

int QAccessibleObjectEx::userActionCount(int child) const

{ return reinterpret_cast<const QAccessibleObject *>(this)->QAccessibleObject::userActionCount(child); }

bool QAccessibleObjectEx::doAction(int action, int child, const QVariantList &params)

{ return reinterpret_cast<QAccessibleObject *>(this)->QAccessibleObject::doAction(action, child, params); }

QString QAccessibleObjectEx::actionText(int action, Text t, int child) const

{ return reinterpret_cast<const QAccessibleObject *>(this)->QAccessibleObject::actionText(action, t, child); }

QAccessibleObjectEx::~QAccessibleObjectEx()

{ delete d; }

QT_END_NAMESPACE

#endif //QT_NO_ACCESSIBILITY