simplewidgets.cpp

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#include "simplewidgets.h"

#include <qabstractbutton.h>
#include <qcheckbox.h>
#include <qpushbutton.h>
#include <qprogressbar.h>
#include <qstatusbar.h>
#include <qradiobutton.h>
#include <qtoolbutton.h>
#include <qlabel.h>
#include <qgroupbox.h>
#include <qlcdnumber.h>
#include <qtextdocument.h>
#include <qlineedit.h>
#include <private/qlineedit_p.h>
#include <qstyle.h>
#include <qstyleoption.h>

#ifdef Q_OS_MAC
#include <qfocusframe.h>
#endif

QT_BEGIN_NAMESPACE

#ifndef QT_NO_ACCESSIBILITY

using namespace QAccessible2;
extern QList<QWidget*> childWidgets(const QWidget *widget, bool includeTopLevel = false);

QString Q_GUI_EXPORT qt_accStripAmp(const QString &text);
QString Q_GUI_EXPORT qt_accHotKey(const QString &text);

QString Q_GUI_EXPORT qTextBeforeOffsetFromString(int offset, QAccessible2::BoundaryType boundaryType,
        int *startOffset, int *endOffset, const QString& text);
QString Q_GUI_EXPORT qTextAtOffsetFromString(int offset, QAccessible2::BoundaryType boundaryType,
        int *startOffset, int *endOffset, const QString& text);
QString Q_GUI_EXPORT qTextAfterOffsetFromString(int offset, QAccessible2::BoundaryType boundaryType,
        int *startOffset, int *endOffset, const QString& text);

QAccessibleButton::QAccessibleButton(QWidget *w, Role role)
: QAccessibleWidgetEx(w, role)
{
    Q_ASSERT(button());
    if (button()->isCheckable())
        addControllingSignal(QLatin1String("toggled(bool)"));
    else
        addControllingSignal(QLatin1String("clicked()"));
}

QAbstractButton *QAccessibleButton::button() const
{
    return qobject_cast<QAbstractButton*>(object());
}

QString QAccessibleButton::actionText(int action, Text text, int child) const
{
    if (child)
        return QString();

    if (text == Name) switch (action) {
    case Press:
    case DefaultAction: // press, checking or open
        switch (role(0)) {
        case ButtonMenu:
            return QPushButton::tr("Open");
        case CheckBox:
            {
                if (state(child) & Checked)
                    return QCheckBox::tr("Uncheck");
                QCheckBox *cb = qobject_cast<QCheckBox*>(object());
                if (!cb || !cb->isTristate() || cb->checkState() == Qt::PartiallyChecked)
                    return QCheckBox::tr("Check");
                return QCheckBox::tr("Toggle");
            }
            break;
        case RadioButton:
            return QRadioButton::tr("Check");
        default:
            break;
        }
        break;
    }
    return QAccessibleWidgetEx::actionText(action, text, child);
}

bool QAccessibleButton::doAction(int action, int child, const QVariantList &params)
{
    if (child || !widget()->isEnabled())
        return false;

    switch (action) {
    case DefaultAction:
    case Press:
        {
#ifndef QT_NO_MENU
            QPushButton *pb = qobject_cast<QPushButton*>(object());
            if (pb && pb->menu())
                pb->showMenu();
            else
#endif
                button()->animateClick();
        }
        return true;
    }
    return QAccessibleWidgetEx::doAction(action, child, params);
}

QString QAccessibleButton::text(Text t, int child) const
{
    QString str;
    switch (t) {
    case Accelerator:
        {
#ifndef QT_NO_SHORTCUT
            QPushButton *pb = qobject_cast<QPushButton*>(object());
            if (pb && pb->isDefault())
                str = (QString)QKeySequence(Qt::Key_Enter);
#endif
            if (str.isEmpty())
                str = qt_accHotKey(button()->text());
        }
        break;
    case Name:
        str = widget()->accessibleName();
        if (str.isEmpty())
            str = button()->text();
        break;
    default:
        break;
    }
    if (str.isEmpty())
        str = QAccessibleWidgetEx::text(t, child);
    return qt_accStripAmp(str);
}

QAccessible::State QAccessibleButton::state(int child) const
{
    State state = QAccessibleWidgetEx::state(child);

    QAbstractButton *b = button();
    QCheckBox *cb = qobject_cast<QCheckBox *>(b);
    if (b->isChecked())
        state |= Checked;
    else if (cb && cb->checkState() == Qt::PartiallyChecked)
        state |= Mixed;
    if (b->isDown())
        state |= Pressed;
    QPushButton *pb = qobject_cast<QPushButton*>(b);
    if (pb) {
        if (pb->isDefault())
            state |= DefaultButton;
#ifndef QT_NO_MENU
        if (pb->menu())
            state |= HasPopup;
#endif
    }

    return state;
}

int QAccessibleButton::actionCount()
{
    return 1;
}

void QAccessibleButton::doAction(int actionIndex)
{
    switch (actionIndex) {
    case 0:
        button()->click();
        break;
    }
}

QString QAccessibleButton::description(int actionIndex)
{
    switch (actionIndex) {
    case 0:
        if (button()->isCheckable()) {
            return QLatin1String("Toggles the button.");
        }
        return QLatin1String("Clicks the button.");
    default:
        return QString();
    }
}

QString QAccessibleButton::name(int actionIndex)
{
    switch (actionIndex) {
    case 0:
        if (button()->isCheckable()) {
            if (button()->isChecked()) {
                return QLatin1String("Uncheck");
            } else {
                return QLatin1String("Check");
            }
        }
        return QLatin1String("Press");
    default:
        return QString();
    }
}

QString QAccessibleButton::localizedName(int actionIndex)
{
    switch (actionIndex) {
    case 0:
        if (button()->isCheckable()) {
            if (button()->isChecked()) {
                return tr("Uncheck");
            } else {
                return tr("Check");
            }
        }
        return tr("Press");
    default:
        return QString();
    }
}

QStringList QAccessibleButton::keyBindings(int actionIndex)
{
    switch (actionIndex) {
#ifndef QT_NO_SHORTCUT
    case 0:
        return QStringList() << button()->shortcut().toString();
#endif
    default:
        return QStringList();
    }
}

#ifndef QT_NO_TOOLBUTTON

QAccessibleToolButton::QAccessibleToolButton(QWidget *w, Role role)
: QAccessibleButton(w, role)
{
    Q_ASSERT(toolButton());
}

QToolButton *QAccessibleToolButton::toolButton() const
{
    return qobject_cast<QToolButton*>(object());
}

bool QAccessibleToolButton::isSplitButton() const
{
#ifndef QT_NO_MENU
    return toolButton()->menu() && toolButton()->popupMode() == QToolButton::MenuButtonPopup;
#else
    return false;
#endif
}

QAccessible::Role QAccessibleToolButton::role(int child) const
{
    if (isSplitButton()) switch(child) {
    case ButtonExecute:
        return PushButton;
    case ButtonDropMenu:
        return ButtonMenu;
    }
    return QAccessibleButton::role(child);
}

QAccessible::State QAccessibleToolButton::state(int child) const
{
    QAccessible::State st = QAccessibleButton::state(child);
    if (toolButton()->autoRaise())
        st |= HotTracked;
#ifndef QT_NO_MENU
    if (toolButton()->menu() && child != ButtonExecute)
        st |= HasPopup;
#endif
    return st;
}

int QAccessibleToolButton::childCount() const
{
    if (!toolButton()->isVisible())
        return 0;
    return isSplitButton() ? ButtonDropMenu : 0;
}

QRect QAccessibleToolButton::rect(int child) const
{
    if (!toolButton()->isVisible())
        return QRect();
    if (!child)
        return QAccessibleButton::rect(child);

    QStyleOptionToolButton opt;
    opt.init(widget());
    QRect subrect = widget()->style()->subControlRect(QStyle::CC_ToolButton, &opt,
                                                      QStyle::SC_ToolButtonMenu, toolButton());

    if (child == ButtonExecute)
        subrect = QRect(0, 0, subrect.x(), widget()->height());

    QPoint ntl = widget()->mapToGlobal(subrect.topLeft());
    subrect.moveTopLeft(ntl);
    return subrect;
}

QString QAccessibleToolButton::text(Text t, int child) const
{
    QString str;
    switch (t) {
    case Name:
        str = toolButton()->accessibleName();
        if (str.isEmpty())
            str = toolButton()->text();
        break;
    default:
        break;
    }
    if (str.isEmpty())
        str = QAccessibleButton::text(t, child);;
    return qt_accStripAmp(str);
}

int QAccessibleToolButton::actionCount(int child) const
{
    // each subelement has one action
    if (child)
        return isSplitButton() ? 1 : 0;
    int ac = widget()->focusPolicy() != Qt::NoFocus ? 1 : 0;
    // button itself has two actions if a menu button
#ifndef QT_NO_MENU
    return ac + (toolButton()->menu() ? 2 : 1);
#else
    return ac + 1;
#endif
}

QString QAccessibleToolButton::actionText(int action, Text text, int child) const
{
    if (text == Name) switch(child) {
    case ButtonExecute:
        return QToolButton::tr("Press");
    case ButtonDropMenu:
        return QToolButton::tr("Open");
    default:
        switch(action) {
        case 0:
            return QToolButton::tr("Press");
        case 1:
#ifndef QT_NO_MENU
            if (toolButton()->menu())
                return QToolButton::tr("Open");
#endif
            //fall through
        case 2:
            return QLatin1String("Set Focus");
        }
    }
    return QString();
}

bool QAccessibleToolButton::doAction(int action, int child, const QVariantList &params)
{
    if (!widget()->isEnabled())
        return false;
    if (action == 1 || child == ButtonDropMenu) {
        if(!child)
            toolButton()->setDown(true);
#ifndef QT_NO_MENU
        toolButton()->showMenu();
#endif
        return true;
    }
    return QAccessibleButton::doAction(action, 0, params);
}

#endif // QT_NO_TOOLBUTTON

QAccessibleDisplay::QAccessibleDisplay(QWidget *w, Role role)
: QAccessibleWidgetEx(w, role)
{
}

QAccessible::Role QAccessibleDisplay::role(int child) const
{
    QLabel *l = qobject_cast<QLabel*>(object());
    if (l) {
        if (l->pixmap())
            return Graphic;
#ifndef QT_NO_PICTURE
        if (l->picture())
            return Graphic;
#endif
#ifndef QT_NO_MOVIE
        if (l->movie())
            return Animation;
#endif
#ifndef QT_NO_PROGRESSBAR
    } else if (qobject_cast<QProgressBar*>(object())) {
        return ProgressBar;
#endif
    } else if (qobject_cast<QStatusBar*>(object())) {
        return StatusBar;
    }
    return QAccessibleWidgetEx::role(child);
}

QString QAccessibleDisplay::text(Text t, int child) const
{
    QString str;
    switch (t) {
    case Name:
        str = widget()->accessibleName();
        if (str.isEmpty()) {
            if (qobject_cast<QLabel*>(object())) {
                QLabel *label = qobject_cast<QLabel*>(object());
                str = label->text();
                if (label->textFormat() == Qt::RichText
                    || (label->textFormat() == Qt::AutoText && Qt::mightBeRichText(str))) {
                    QTextDocument doc;
                    doc.setHtml(str);
                    str = doc.toPlainText();
                }
#ifndef QT_NO_LCDNUMBER
            } else if (qobject_cast<QLCDNumber*>(object())) {
                QLCDNumber *l = qobject_cast<QLCDNumber*>(object());
                if (l->digitCount())
                    str = QString::number(l->value());
                else
                    str = QString::number(l->intValue());
#endif
            } else if (qobject_cast<QStatusBar*>(object())) {
                return qobject_cast<QStatusBar*>(object())->currentMessage();
            }
        }
        break;
    case Value:
#ifndef QT_NO_PROGRESSBAR
        if (qobject_cast<QProgressBar*>(object()))
            str = QString::number(qobject_cast<QProgressBar*>(object())->value());
#endif
        break;
    default:
        break;
    }
    if (str.isEmpty())
        str = QAccessibleWidgetEx::text(t, child);;
    return qt_accStripAmp(str);
}

QAccessible::Relation QAccessibleDisplay::relationTo(int child, const QAccessibleInterface *other,
                                                     int otherChild) const
{
    Relation relation = QAccessibleWidgetEx::relationTo(child, other, otherChild);
    if (child || otherChild)
        return relation;

    QObject *o = other->object();
    QLabel *label = qobject_cast<QLabel*>(object());
    if (label) {
#ifndef QT_NO_SHORTCUT
        if (o == label->buddy())
            relation |= Label;
#endif
    }
    return relation;
}

int QAccessibleDisplay::navigate(RelationFlag rel, int entry, QAccessibleInterface **target) const
{
    *target = 0;
    if (rel == Labelled) {
        QObject *targetObject = 0;
        QLabel *label = qobject_cast<QLabel*>(object());
        if (label) {
#ifndef QT_NO_SHORTCUT
            if (entry == 1)
                targetObject = label->buddy();
#endif
        }
        *target = QAccessible::queryAccessibleInterface(targetObject);
        if (*target)
            return 0;
    }
    return QAccessibleWidgetEx::navigate(rel, entry, target);
}

QString QAccessibleDisplay::imageDescription()
{
#ifndef QT_NO_TOOLTIP
    return widget()->toolTip();
#else
    return QString::null;
#endif
}

QSize QAccessibleDisplay::imageSize()
{
    QLabel *label = qobject_cast<QLabel *>(widget());
    if (!label)
        return QSize();
    const QPixmap *pixmap = label->pixmap();
    if (!pixmap)
        return QSize();
    return pixmap->size();
}

QRect QAccessibleDisplay::imagePosition(QAccessible2::CoordinateType coordType)
{
    QLabel *label = qobject_cast<QLabel *>(widget());
    if (!label)
        return QRect();
    const QPixmap *pixmap = label->pixmap();
    if (!pixmap)
        return QRect();

    switch (coordType) {
    case QAccessible2::RelativeToScreen:
        return QRect(label->mapToGlobal(label->pos()), label->size());
    case QAccessible2::RelativeToParent:
        return label->geometry();
    }

    return QRect();
}

#ifndef QT_NO_GROUPBOX
QAccessibleGroupBox::QAccessibleGroupBox(QWidget *w)
 : QAccessibleWidgetEx(w, Grouping)
{
}

QGroupBox* QAccessibleGroupBox::groupBox() const
{
    return static_cast<QGroupBox *>(widget());
}

QString QAccessibleGroupBox::text(QAccessible::Text t, int child) const
{
    QString txt = QAccessibleWidgetEx::text(t, child);

    if (txt.isEmpty()) {
        switch (t) {
        case Name:
            txt = qt_accStripAmp(groupBox()->title());
        case Description:
            txt = qt_accStripAmp(groupBox()->title());
        default:
            break;
        }
    }

    return txt;
}

QAccessible::State QAccessibleGroupBox::state(int child) const
{
    QAccessible::State st = QAccessibleWidgetEx::state(child);

    if (groupBox()->isChecked())
        st |= QAccessible::Checked;

    return st;
}

QAccessible::Role QAccessibleGroupBox::role(int child) const
{
    if (child)
        return QAccessibleWidgetEx::role(child);

    return groupBox()->isCheckable() ? QAccessible::CheckBox : QAccessible::Grouping;
}

int QAccessibleGroupBox::navigate(RelationFlag rel, int entry, QAccessibleInterface **target) const
{
    if ((rel == Labelled) && !groupBox()->title().isEmpty())
        rel = Child;
    return QAccessibleWidgetEx::navigate(rel, entry, target);
}

QAccessible::Relation QAccessibleGroupBox::relationTo(int child, const QAccessibleInterface* other, int otherChild) const
{
    QGroupBox *groupbox = this->groupBox();

    QAccessible::Relation relation = QAccessibleWidgetEx::relationTo(child, other, otherChild);

    if (!child && !otherChild && !groupbox->title().isEmpty()) {
        QObject *o = other->object();
        if (groupbox->children().contains(o))
            relation |= Label;
    }

    return relation;
}

int QAccessibleGroupBox::actionCount()
{
    return groupBox()->isCheckable() ? 1 : 0;
}

void QAccessibleGroupBox::doAction(int actionIndex)
{
    if ((actionIndex == 0) && groupBox()->isCheckable()) {
        groupBox()->setChecked(!groupBox()->isChecked());
    }
}

QString QAccessibleGroupBox::description(int actionIndex)
{
    if ((actionIndex == 0) && (groupBox()->isCheckable())) {
        return QLatin1String("Toggles the button.");
    }
    return QString();
}

QString QAccessibleGroupBox::name(int actionIndex)
{
    if (actionIndex || !groupBox()->isCheckable())
        return QString();

    return QLatin1String("Toggle");
}

QString QAccessibleGroupBox::localizedName(int actionIndex)
{
    if (actionIndex || !groupBox()->isCheckable())
        return QString();

    return QGroupBox::tr("Toggle");
}

QStringList QAccessibleGroupBox::keyBindings(int actionIndex)
{
    Q_UNUSED(actionIndex)
    return QStringList();
}

#endif

#ifndef QT_NO_LINEEDIT

QAccessibleLineEdit::QAccessibleLineEdit(QWidget *w, const QString &name)
: QAccessibleWidgetEx(w, EditableText, name), QAccessibleSimpleEditableTextInterface(this)
{
    addControllingSignal(QLatin1String("textChanged(const QString&)"));
    addControllingSignal(QLatin1String("returnPressed()"));
}

QLineEdit *QAccessibleLineEdit::lineEdit() const
{
    return qobject_cast<QLineEdit*>(object());
}

QString QAccessibleLineEdit::text(Text t, int child) const
{
    QString str;
    switch (t) {
    case Value:
        if (lineEdit()->echoMode() == QLineEdit::Normal)
            str = lineEdit()->text();
        break;
    default:
        break;
    }
    if (str.isEmpty())
        str = QAccessibleWidgetEx::text(t, child);;
    return qt_accStripAmp(str);
}

void QAccessibleLineEdit::setText(Text t, int control, const QString &text)
{
    if (t != Value || control) {
        QAccessibleWidgetEx::setText(t, control, text);
        return;
    }

    QString newText = text;
    if (lineEdit()->validator()) {
        int pos = 0;
        if (lineEdit()->validator()->validate(newText, pos) != QValidator::Acceptable)
            return;
    }
    lineEdit()->setText(newText);
}

QAccessible::State QAccessibleLineEdit::state(int child) const
{
    State state = QAccessibleWidgetEx::state(child);

    QLineEdit *l = lineEdit();
    if (l->isReadOnly())
        state |= ReadOnly;
    if (l->echoMode() != QLineEdit::Normal)
        state |= Protected;
    state |= Selectable;
    if (l->hasSelectedText())
        state |= Selected;

    if (l->contextMenuPolicy() != Qt::NoContextMenu
        && l->contextMenuPolicy() != Qt::PreventContextMenu)
        state |= HasPopup;

    return state;
}

QVariant QAccessibleLineEdit::invokeMethodEx(QAccessible::Method method, int child,
                                                     const QVariantList &params)
{
    if (child)
        return QVariant();

    switch (method) {
    case ListSupportedMethods: {
        QSet<QAccessible::Method> set;
        set << ListSupportedMethods << SetCursorPosition << GetCursorPosition;
        return QVariant::fromValue(set | qvariant_cast<QSet<QAccessible::Method> >(
                QAccessibleWidgetEx::invokeMethodEx(method, child, params)));
    }
    case SetCursorPosition:
        setCursorPosition(params.value(0).toInt());
        return true;
    case GetCursorPosition:
        return cursorPosition();
    default:
        return QAccessibleWidgetEx::invokeMethodEx(method, child, params);
    }
}

void QAccessibleLineEdit::addSelection(int startOffset, int endOffset)
{
    setSelection(0, startOffset, endOffset);
}

QString QAccessibleLineEdit::attributes(int offset, int *startOffset, int *endOffset)
{
    // QLineEdit doesn't have text attributes
    *startOffset = *endOffset = offset;
    return QString();
}

int QAccessibleLineEdit::cursorPosition()
{
    return lineEdit()->cursorPosition();
}

QRect QAccessibleLineEdit::characterRect(int offset, CoordinateType coordType)
{
    int left, top, right, bottom;
    lineEdit()->getTextMargins(&left, &top, &right, &bottom);
    int x = lineEdit()->d_func()->control->cursorToX(offset);
    int y = top;
    QFontMetrics fm(lineEdit()->font());
    const QString ch = text(offset, offset + 1);
    int w = fm.width(ch);
    int h = fm.height();

    QRect r(x, y, w, h);
    if (coordType == QAccessible2::RelativeToScreen)
        r.moveTo(lineEdit()->mapToGlobal(r.topLeft()));

    return r;
}

int QAccessibleLineEdit::selectionCount()
{
    return lineEdit()->hasSelectedText() ? 1 : 0;
}

int QAccessibleLineEdit::offsetAtPoint(const QPoint &point, CoordinateType coordType)
{
    QPoint p = point;
    if (coordType == RelativeToScreen)
        p = lineEdit()->mapFromGlobal(p);

    return lineEdit()->cursorPositionAt(p);
}

void QAccessibleLineEdit::selection(int selectionIndex, int *startOffset, int *endOffset)
{
    *startOffset = *endOffset = 0;
    if (selectionIndex != 0)
        return;

    *startOffset = lineEdit()->selectionStart();
    *endOffset = *startOffset + lineEdit()->selectedText().count();
}

QString QAccessibleLineEdit::text(int startOffset, int endOffset)
{
    if (startOffset > endOffset)
        return QString();

    if (lineEdit()->echoMode() != QLineEdit::Normal)
        return QString();

    return lineEdit()->text().mid(startOffset, endOffset - startOffset);
}

QString QAccessibleLineEdit::textBeforeOffset(int offset, BoundaryType boundaryType,
        int *startOffset, int *endOffset)
{
    if (lineEdit()->echoMode() != QLineEdit::Normal) {
        *startOffset = *endOffset = -1;
        return QString();
    }
    return qTextBeforeOffsetFromString(offset, boundaryType, startOffset, endOffset, lineEdit()->text());
}

QString QAccessibleLineEdit::textAfterOffset(int offset, BoundaryType boundaryType,
        int *startOffset, int *endOffset)
{
    if (lineEdit()->echoMode() != QLineEdit::Normal) {
        *startOffset = *endOffset = -1;
        return QString();
    }
    return qTextAfterOffsetFromString(offset, boundaryType, startOffset, endOffset, lineEdit()->text());
}

QString QAccessibleLineEdit::textAtOffset(int offset, BoundaryType boundaryType,
        int *startOffset, int *endOffset)
{
    if (lineEdit()->echoMode() != QLineEdit::Normal) {
        *startOffset = *endOffset = -1;
        return QString();
    }
    return qTextAtOffsetFromString(offset, boundaryType, startOffset, endOffset, lineEdit()->text());
}

void QAccessibleLineEdit::removeSelection(int selectionIndex)
{
    if (selectionIndex != 0)
        return;

    lineEdit()->deselect();
}

void QAccessibleLineEdit::setCursorPosition(int position)
{
    lineEdit()->setCursorPosition(position);
}

void QAccessibleLineEdit::setSelection(int selectionIndex, int startOffset, int endOffset)
{
    if (selectionIndex != 0)
        return;

    lineEdit()->setSelection(startOffset, endOffset - startOffset);
}

int QAccessibleLineEdit::characterCount()
{
    return lineEdit()->text().count();
}

void QAccessibleLineEdit::scrollToSubstring(int startIndex, int endIndex)
{
    lineEdit()->setCursorPosition(endIndex);
    lineEdit()->setCursorPosition(startIndex);
}

#endif // QT_NO_LINEEDIT

#ifndef QT_NO_PROGRESSBAR
QAccessibleProgressBar::QAccessibleProgressBar(QWidget *o)
    : QAccessibleDisplay(o)
{
    Q_ASSERT(progressBar());
}

QVariant QAccessibleProgressBar::currentValue()
{
    return progressBar()->value();
}

QVariant QAccessibleProgressBar::maximumValue()
{
    return progressBar()->maximum();
}

QVariant QAccessibleProgressBar::minimumValue()
{
    return progressBar()->minimum();
}

QProgressBar *QAccessibleProgressBar::progressBar() const
{
    return qobject_cast<QProgressBar *>(object());
}
#endif

#endif // QT_NO_ACCESSIBILITY

QT_END_NAMESPACE