qquicktextarea.cpp

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// Copyright (C) 2017 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only
 
#include "qquicktextarea_p.h"
#include "qquicktextarea_p_p.h"
#include "qquickcontrol_p.h"
#include "qquickcontrol_p_p.h"
#include "qquickscrollview_p.h"
#include "qquickdeferredexecute_p_p.h"
 
#include <QtQml/qqmlinfo.h>
#include <QtQuick/private/qquickitem_p.h>
#include <QtQuick/private/qquickclipnode_p.h>
#include <QtQuick/private/qquickflickable_p.h>
 
#if QT_CONFIG(accessibility)
#include <QtQuick/private/qquickaccessibleattached_p.h>
#endif
 
QT_BEGIN_NAMESPACE
 
using namespace Qt::StringLiterals;
 
 
QQuickTextAreaPrivate::QQuickTextAreaPrivate()
{
#if QT_CONFIG(accessibility)
    QAccessible::installActivationObserver(this);
#endif
}
 
QQuickTextAreaPrivate::~QQuickTextAreaPrivate()
{
#if QT_CONFIG(accessibility)
    QAccessible::removeActivationObserver(this);
#endif
}
 
void QQuickTextAreaPrivate::setTopInset(qreal value, bool reset)
{
    Q_Q(QQuickTextArea);
    const QMarginsF oldInset = getInset();
    extra.value().topInset = value;
    extra.value().hasTopInset = !reset;
    if (!qFuzzyCompare(oldInset.top(), value)) {
        emit q->topInsetChanged();
        q->insetChange(getInset(), oldInset);
    }
}
 
void QQuickTextAreaPrivate::setLeftInset(qreal value, bool reset)
{
    Q_Q(QQuickTextArea);
    const QMarginsF oldInset = getInset();
    extra.value().leftInset = value;
    extra.value().hasLeftInset = !reset;
    if (!qFuzzyCompare(oldInset.left(), value)) {
        emit q->leftInsetChanged();
        q->insetChange(getInset(), oldInset);
    }
}
 
void QQuickTextAreaPrivate::setRightInset(qreal value, bool reset)
{
    Q_Q(QQuickTextArea);
    const QMarginsF oldInset = getInset();
    extra.value().rightInset = value;
    extra.value().hasRightInset = !reset;
    if (!qFuzzyCompare(oldInset.right(), value)) {
        emit q->rightInsetChanged();
        q->insetChange(getInset(), oldInset);
    }
}
 
void QQuickTextAreaPrivate::setBottomInset(qreal value, bool reset)
{
    Q_Q(QQuickTextArea);
    const QMarginsF oldInset = getInset();
    extra.value().bottomInset = value;
    extra.value().hasBottomInset = !reset;
    if (!qFuzzyCompare(oldInset.bottom(), value)) {
        emit q->bottomInsetChanged();
        q->insetChange(getInset(), oldInset);
    }
}
 
void QQuickTextAreaPrivate::resizeBackground()
{
    if (!background)
        return;
 
    resizingBackground = true;
 
    // When using the attached property TextArea.flickable, we reparent the background out
    // of TextArea and into the Flickable since we don't want the background to move while
    // flicking. This means that the size of the background should also follow the size of
    // the Flickable rather than the size of the TextArea.
    const auto flickable = qobject_cast<QQuickFlickable *>(background->parentItem());
 
    QQuickItemPrivate *p = QQuickItemPrivate::get(background);
    if (((!p->widthValid() || !extra.isAllocated() || !extra->hasBackgroundWidth) && qFuzzyIsNull(background->x()))
            || (extra.isAllocated() && (extra->hasLeftInset || extra->hasRightInset))) {
        const qreal bgWidth = flickable ? flickable->width() : width;
        background->setX(getLeftInset());
        background->setWidth(bgWidth - getLeftInset() - getRightInset());
    }
 
    if (((!p->heightValid() || !extra.isAllocated() || !extra->hasBackgroundHeight) && qFuzzyIsNull(background->y()))
            || (extra.isAllocated() && (extra->hasTopInset || extra->hasBottomInset))) {
        const qreal bgHeight = flickable ? flickable->height() : height;
        background->setY(getTopInset());
        background->setHeight(bgHeight - getTopInset() - getBottomInset());
    }
 
    resizingBackground = false;
}
 
void QQuickTextAreaPrivate::resolveFont()
{
    Q_Q(QQuickTextArea);
    inheritFont(QQuickControlPrivate::parentFont(q));
}
 
void QQuickTextAreaPrivate::inheritFont(const QFont &font)
{
    QFont parentFont = extra.isAllocated() ? extra->requestedFont.resolve(font) : font;
    parentFont.setResolveMask(extra.isAllocated() ? extra->requestedFont.resolveMask() | font.resolveMask() : font.resolveMask());
 
    const QFont defaultFont = QQuickTheme::font(QQuickTheme::TextArea);
    QFont resolvedFont = parentFont.resolve(defaultFont);
 
    setFont_helper(resolvedFont);
}
 
void QQuickTextAreaPrivate::updateFont(const QFont &font)
{
    Q_Q(QQuickTextArea);
    QFont oldFont = sourceFont;
    q->QQuickTextEdit::setFont(font);
 
    QQuickControlPrivate::updateFontRecur(q, font);
 
    if (oldFont != font)
        emit q->fontChanged();
}
 
#if QT_CONFIG(quicktemplates2_hover)
void QQuickTextAreaPrivate::updateHoverEnabled(bool enabled, bool xplicit)
{
    Q_Q(QQuickTextArea);
    if (!xplicit && explicitHoverEnabled)
        return;
 
    bool wasEnabled = q->isHoverEnabled();
    explicitHoverEnabled = xplicit;
    if (wasEnabled != enabled) {
        q->setAcceptHoverEvents(enabled);
        QQuickControlPrivate::updateHoverEnabledRecur(q, enabled);
        emit q->hoverEnabledChanged();
    }
}
#endif
 
void QQuickTextAreaPrivate::attachFlickable(QQuickFlickable *item)
{
    Q_Q(QQuickTextArea);
    flickable = item;
    q->setParentItem(flickable->contentItem());
 
    if (background)
        background->setParentItem(flickable);
 
    QObjectPrivate::connect(q, &QQuickTextArea::contentSizeChanged, this, &QQuickTextAreaPrivate::resizeFlickableContent);
    QObjectPrivate::connect(q, &QQuickTextEdit::cursorRectangleChanged, this, &QQuickTextAreaPrivate::ensureCursorVisible);
 
    QObject::connect(flickable, &QQuickFlickable::contentXChanged, q, &QQuickItem::update);
    QObject::connect(flickable, &QQuickFlickable::contentYChanged, q, &QQuickItem::update);
 
    QQuickItemPrivate::get(flickable)->updateOrAddGeometryChangeListener(this, QQuickGeometryChange::Size);
    QQuickItemPrivate::get(flickable)->addItemChangeListener(this, QQuickItemPrivate::Destroyed);
    QObjectPrivate::connect(flickable, &QQuickFlickable::contentWidthChanged, this, &QQuickTextAreaPrivate::resizeFlickableControl);
    QObjectPrivate::connect(flickable, &QQuickFlickable::contentHeightChanged, this, &QQuickTextAreaPrivate::resizeFlickableControl);
 
    resizeFlickableControl();
}
 
void QQuickTextAreaPrivate::detachFlickable()
{
    Q_Q(QQuickTextArea);
    q->setParentItem(nullptr);
    if (background && background->parentItem() == flickable)
        background->setParentItem(q);
 
    QObjectPrivate::disconnect(q, &QQuickTextArea::contentSizeChanged, this, &QQuickTextAreaPrivate::resizeFlickableContent);
    QObjectPrivate::disconnect(q, &QQuickTextEdit::cursorRectangleChanged, this, &QQuickTextAreaPrivate::ensureCursorVisible);
 
    QObject::disconnect(flickable, &QQuickFlickable::contentXChanged, q, &QQuickItem::update);
    QObject::disconnect(flickable, &QQuickFlickable::contentYChanged, q, &QQuickItem::update);
 
    QQuickItemPrivate::get(flickable)->updateOrRemoveGeometryChangeListener(this, QQuickGeometryChange::Nothing);
    QQuickItemPrivate::get(flickable)->removeItemChangeListener(this, QQuickItemPrivate::Destroyed);
    QObjectPrivate::disconnect(flickable, &QQuickFlickable::contentWidthChanged, this, &QQuickTextAreaPrivate::resizeFlickableControl);
    QObjectPrivate::disconnect(flickable, &QQuickFlickable::contentHeightChanged, this, &QQuickTextAreaPrivate::resizeFlickableControl);
 
    flickable = nullptr;
 
    resizeBackground();
}
 
void QQuickTextAreaPrivate::ensureCursorVisible()
{
    Q_Q(QQuickTextArea);
    if (!flickable)
        return;
 
    const qreal cx = flickable->contentX();
    const qreal cy = flickable->contentY();
    const qreal w = flickable->width();
    const qreal h = flickable->height();
 
    const qreal tp = q->topPadding();
    const qreal lp = q->leftPadding();
    const QRectF cr = q->cursorRectangle();
 
    if (cr.left() <= cx + lp) {
        flickable->setContentX(cr.left() - lp);
    } else {
        // calculate the rectangle of the next character and ensure that
        // it's visible if it's on the same line with the cursor
        const qreal rp = q->rightPadding();
        const QRectF nr = q->cursorPosition() < q->length() ? q->positionToRectangle(q->cursorPosition() + 1) : QRectF();
        if (qFuzzyCompare(nr.y(), cr.y()) && nr.right() >= cx + lp + w - rp)
            flickable->setContentX(nr.right() - w + rp);
        else if (cr.right() >= cx + lp + w - rp)
            flickable->setContentX(cr.right() - w + rp);
    }
 
    if (cr.top() <= cy + tp) {
        flickable->setContentY(cr.top() - tp);
    } else {
        const qreal bp = q->bottomPadding();
        if (cr.bottom() >= cy + tp + h - bp && cr.bottom() <= flickable->contentHeight())
            flickable->setContentY(cr.bottom() - h + bp);
    }
}
 
void QQuickTextAreaPrivate::resizeFlickableControl()
{
    Q_Q(QQuickTextArea);
    if (!flickable)
        return;
 
    const qreal w = wrapMode == QQuickTextArea::NoWrap ? qMax(flickable->width(), flickable->contentWidth()) : flickable->width();
    const qreal h = qMax(flickable->height(), flickable->contentHeight());
    q->setSize(QSizeF(w, h));
 
    resizeBackground();
}
 
void QQuickTextAreaPrivate::resizeFlickableContent()
{
    Q_Q(QQuickTextArea);
    if (!flickable)
        return;
 
    flickable->setContentWidth(q->implicitWidth());
    flickable->setContentHeight(q->implicitHeight());
}
 
void QQuickTextAreaPrivate::itemGeometryChanged(QQuickItem *item, QQuickGeometryChange change, const QRectF &diff)
{
    Q_UNUSED(diff);
    if (!resizingBackground && item == background) {
        QQuickItemPrivate *p = QQuickItemPrivate::get(item);
        // Only set hasBackgroundWidth/Height if it was a width/height change,
        // otherwise we're prevented from setting a width/height in the future.
        if (change.widthChange())
            extra.value().hasBackgroundWidth = p->widthValid();
        if (change.heightChange())
            extra.value().hasBackgroundHeight = p->heightValid();
    }
 
    if (flickable)
        resizeFlickableControl();
    else
        resizeBackground();
}
 
qreal QQuickTextAreaPrivate::getImplicitWidth() const
{
    return QQuickItemPrivate::getImplicitWidth();
}
 
qreal QQuickTextAreaPrivate::getImplicitHeight() const
{
    return QQuickItemPrivate::getImplicitHeight();
}
 
void QQuickTextAreaPrivate::implicitWidthChanged()
{
    Q_Q(QQuickTextArea);
    QQuickItemPrivate::implicitWidthChanged();
    emit q->implicitWidthChanged3();
}
 
void QQuickTextAreaPrivate::implicitHeightChanged()
{
    Q_Q(QQuickTextArea);
    QQuickItemPrivate::implicitHeightChanged();
    emit q->implicitHeightChanged3();
}
 
void QQuickTextAreaPrivate::readOnlyChanged(bool isReadOnly)
{
    Q_UNUSED(isReadOnly);
#if QT_CONFIG(accessibility)
    if (QQuickAccessibleAttached *accessibleAttached = QQuickControlPrivate::accessibleAttached(q_func()))
        accessibleAttached->set_readOnly(isReadOnly);
#endif
}
 
#if QT_CONFIG(accessibility)
void QQuickTextAreaPrivate::accessibilityActiveChanged(bool active)
{
    if (!active)
        return;
 
    Q_Q(QQuickTextArea);
    QQuickAccessibleAttached *accessibleAttached = qobject_cast<QQuickAccessibleAttached *>(qmlAttachedPropertiesObject<QQuickAccessibleAttached>(q, true));
    Q_ASSERT(accessibleAttached);
    accessibleAttached->setRole(effectiveAccessibleRole());
    accessibleAttached->set_readOnly(q->isReadOnly());
    accessibleAttached->setDescription(placeholder);
}
 
QAccessible::Role QQuickTextAreaPrivate::accessibleRole() const
{
    return QAccessible::EditableText;
}
#endif
 
void QQuickTextAreaPrivate::cancelBackground()
{
    Q_Q(QQuickTextArea);
    quickCancelDeferred(q, backgroundName());
}
 
void QQuickTextAreaPrivate::executeBackground(bool complete)
{
    Q_Q(QQuickTextArea);
    if (background.wasExecuted())
        return;
 
    if (!background || complete)
        quickBeginDeferred(q, backgroundName(), background);
    if (complete)
        quickCompleteDeferred(q, backgroundName(), background);
}
 
void QQuickTextAreaPrivate::itemImplicitWidthChanged(QQuickItem *item)
{
    Q_Q(QQuickTextArea);
    if (item == background)
        emit q->implicitBackgroundWidthChanged();
}
 
void QQuickTextAreaPrivate::itemImplicitHeightChanged(QQuickItem *item)
{
    Q_Q(QQuickTextArea);
    if (item == background)
        emit q->implicitBackgroundHeightChanged();
}
 
void QQuickTextAreaPrivate::itemDestroyed(QQuickItem *item)
{
    Q_Q(QQuickTextArea);
    if (item == background) {
        background = nullptr;
        emit q->implicitBackgroundWidthChanged();
        emit q->implicitBackgroundHeightChanged();
    } else if (item == flickable) {
        detachFlickable();
    }
}
 
QPalette QQuickTextAreaPrivate::defaultPalette() const
{
    return QQuickTheme::palette(QQuickTheme::TextArea);
}
 
QQuickTextArea::QQuickTextArea(QQuickItem *parent)
    : QQuickTextEdit(*(new QQuickTextAreaPrivate), parent)
{
    Q_D(QQuickTextArea);
    setActiveFocusOnTab(true);
    setAcceptedMouseButtons(Qt::AllButtons);
    d->setImplicitResizeEnabled(false);
    d->pressHandler.control = this;
 
    QObjectPrivate::connect(this, &QQuickTextEdit::readOnlyChanged,
                            d, &QQuickTextAreaPrivate::readOnlyChanged);
#if QT_VERSION < QT_VERSION_CHECK(7, 0, 0)
    if (qEnvironmentVariable("QT_QUICK_CONTROLS_TEXT_SELECTION_BEHAVIOR") == u"old"_s)
        QQuickTextEdit::setOldSelectionDefault();
#endif
}
 
QQuickTextArea::~QQuickTextArea()
{
    Q_D(QQuickTextArea);
    if (d->flickable)
        d->detachFlickable();
    QQuickControlPrivate::removeImplicitSizeListener(d->background, d, QQuickControlPrivate::ImplicitSizeChanges | QQuickItemPrivate::Geometry);
}
 
QQuickTextAreaAttached *QQuickTextArea::qmlAttachedProperties(QObject *object)
{
    return new QQuickTextAreaAttached(object);
}
 
QFont QQuickTextArea::font() const
{
    Q_D(const QQuickTextArea);
    QFont font = QQuickTextEdit::font();
    // The resolve mask should inherit from the requestedFont
    font.setResolveMask(d->extra.value().requestedFont.resolveMask());
    return font;
}
 
void QQuickTextArea::setFont(const QFont &font)
{
    Q_D(QQuickTextArea);
    if (d->extra.value().requestedFont.resolveMask() == font.resolveMask() && d->extra.value().requestedFont == font)
        return;
 
    d->extra.value().requestedFont = font;
    d->resolveFont();
}
 
QQuickItem *QQuickTextArea::background() const
{
    QQuickTextAreaPrivate *d = const_cast<QQuickTextAreaPrivate *>(d_func());
    if (!d->background)
        d->executeBackground();
    return d->background;
}
 
void QQuickTextArea::setBackground(QQuickItem *background)
{
    Q_D(QQuickTextArea);
    if (d->background == background)
        return;
 
    QQuickControlPrivate::warnIfCustomizationNotSupported(this, background, QStringLiteral("background"));
 
    if (!d->background.isExecuting())
        d->cancelBackground();
 
    const qreal oldImplicitBackgroundWidth = implicitBackgroundWidth();
    const qreal oldImplicitBackgroundHeight = implicitBackgroundHeight();
 
    if (d->extra.isAllocated()) {
        d->extra.value().hasBackgroundWidth = false;
        d->extra.value().hasBackgroundHeight = false;
    }
 
    QQuickControlPrivate::removeImplicitSizeListener(d->background, d, QQuickControlPrivate::ImplicitSizeChanges | QQuickItemPrivate::Geometry);
    QQuickControlPrivate::hideOldItem(d->background);
    d->background = background;
 
    if (background) {
        QQuickItemPrivate *p = QQuickItemPrivate::get(background);
        if (p->widthValid() || p->heightValid()) {
            d->extra.value().hasBackgroundWidth = p->widthValid();
            d->extra.value().hasBackgroundHeight = p->heightValid();
        }
        if (d->flickable)
            background->setParentItem(d->flickable);
        else
            background->setParentItem(this);
        if (qFuzzyIsNull(background->z()))
            background->setZ(-1);
        if (isComponentComplete())
            d->resizeBackground();
        QQuickControlPrivate::addImplicitSizeListener(background, d, QQuickControlPrivate::ImplicitSizeChanges | QQuickItemPrivate::Geometry);
    }
 
    if (!qFuzzyCompare(oldImplicitBackgroundWidth, implicitBackgroundWidth()))
        emit implicitBackgroundWidthChanged();
    if (!qFuzzyCompare(oldImplicitBackgroundHeight, implicitBackgroundHeight()))
        emit implicitBackgroundHeightChanged();
    if (!d->background.isExecuting())
        emit backgroundChanged();
}
 
QString QQuickTextArea::placeholderText() const
{
    Q_D(const QQuickTextArea);
    return d->placeholder;
}
 
void QQuickTextArea::setPlaceholderText(const QString &text)
{
    Q_D(QQuickTextArea);
    if (d->placeholder == text)
        return;
 
    d->placeholder = text;
#if QT_CONFIG(accessibility)
    if (QQuickAccessibleAttached *accessibleAttached = QQuickControlPrivate::accessibleAttached(this))
        accessibleAttached->setDescription(text);
#endif
    emit placeholderTextChanged();
}
 
QColor QQuickTextArea::placeholderTextColor() const
{
    Q_D(const QQuickTextArea);
    return d->placeholderColor;
}
 
void QQuickTextArea::setPlaceholderTextColor(const QColor &color)
{
    Q_D(QQuickTextArea);
    if (d->placeholderColor == color)
        return;
 
    d->placeholderColor = color;
    emit placeholderTextColorChanged();
}
 
Qt::FocusReason QQuickTextArea::focusReason() const
{
    Q_D(const QQuickTextArea);
    return d->focusReason;
}
 
void QQuickTextArea::setFocusReason(Qt::FocusReason reason)
{
    Q_D(QQuickTextArea);
    if (d->focusReason == reason)
        return;
 
    d->focusReason = reason;
    emit focusReasonChanged();
}
 
bool QQuickTextArea::contains(const QPointF &point) const
{
    Q_D(const QQuickTextArea);
    if (d->flickable && !d->flickable->contains(d->flickable->mapFromItem(this, point)))
        return false;
    return QQuickTextEdit::contains(point);
}
 
bool QQuickTextArea::isHovered() const
{
#if QT_CONFIG(quicktemplates2_hover)
    Q_D(const QQuickTextArea);
    return d->hovered;
#else
    return false;
#endif
}
 
void QQuickTextArea::setHovered(bool hovered)
{
#if QT_CONFIG(quicktemplates2_hover)
    Q_D(QQuickTextArea);
    if (hovered == d->hovered)
        return;
 
    d->hovered = hovered;
    emit hoveredChanged();
#else
    Q_UNUSED(hovered);
#endif
}
 
bool QQuickTextArea::isHoverEnabled() const
{
#if QT_CONFIG(quicktemplates2_hover)
    Q_D(const QQuickTextArea);
    return d->hoverEnabled;
#else
    return false;
#endif
}
 
void QQuickTextArea::setHoverEnabled(bool enabled)
{
#if QT_CONFIG(quicktemplates2_hover)
    Q_D(QQuickTextArea);
    if (d->explicitHoverEnabled && enabled == d->hoverEnabled)
        return;
 
    d->updateHoverEnabled(enabled, true); // explicit=true
#else
    Q_UNUSED(enabled);
#endif
}
 
void QQuickTextArea::resetHoverEnabled()
{
#if QT_CONFIG(quicktemplates2_hover)
    Q_D(QQuickTextArea);
    if (!d->explicitHoverEnabled)
        return;
 
    d->explicitHoverEnabled = false;
    d->updateHoverEnabled(QQuickControlPrivate::calcHoverEnabled(d->parentItem), false); // explicit=false
#endif
}
 
qreal QQuickTextArea::implicitBackgroundWidth() const
{
    Q_D(const QQuickTextArea);
    if (!d->background)
        return 0;
    return d->background->implicitWidth();
}
 
qreal QQuickTextArea::implicitBackgroundHeight() const
{
    Q_D(const QQuickTextArea);
    if (!d->background)
        return 0;
    return d->background->implicitHeight();
}
 
qreal QQuickTextArea::topInset() const
{
    Q_D(const QQuickTextArea);
    return d->getTopInset();
}
 
void QQuickTextArea::setTopInset(qreal inset)
{
    Q_D(QQuickTextArea);
    d->setTopInset(inset);
}
 
void QQuickTextArea::resetTopInset()
{
    Q_D(QQuickTextArea);
    d->setTopInset(0, true);
}
 
qreal QQuickTextArea::leftInset() const
{
    Q_D(const QQuickTextArea);
    return d->getLeftInset();
}
 
void QQuickTextArea::setLeftInset(qreal inset)
{
    Q_D(QQuickTextArea);
    d->setLeftInset(inset);
}
 
void QQuickTextArea::resetLeftInset()
{
    Q_D(QQuickTextArea);
    d->setLeftInset(0, true);
}
 
qreal QQuickTextArea::rightInset() const
{
    Q_D(const QQuickTextArea);
    return d->getRightInset();
}
 
void QQuickTextArea::setRightInset(qreal inset)
{
    Q_D(QQuickTextArea);
    d->setRightInset(inset);
}
 
void QQuickTextArea::resetRightInset()
{
    Q_D(QQuickTextArea);
    d->setRightInset(0, true);
}
 
qreal QQuickTextArea::bottomInset() const
{
    Q_D(const QQuickTextArea);
    return d->getBottomInset();
}
 
void QQuickTextArea::setBottomInset(qreal inset)
{
    Q_D(QQuickTextArea);
    d->setBottomInset(inset);
}
 
void QQuickTextArea::resetBottomInset()
{
    Q_D(QQuickTextArea);
    d->setBottomInset(0, true);
}
 
void QQuickTextArea::classBegin()
{
    Q_D(QQuickTextArea);
    QQuickTextEdit::classBegin();
    d->resolveFont();
}
 
void QQuickTextArea::componentComplete()
{
    Q_D(QQuickTextArea);
    d->executeBackground(true);
    QQuickTextEdit::componentComplete();
    d->resizeBackground();
#if QT_CONFIG(quicktemplates2_hover)
    if (!d->explicitHoverEnabled)
        setAcceptHoverEvents(QQuickControlPrivate::calcHoverEnabled(d->parentItem));
#endif
#if QT_CONFIG(accessibility)
    if (QAccessible::isActive())
        d->accessibilityActiveChanged(true);
#endif
}
 
void QQuickTextArea::itemChange(QQuickItem::ItemChange change, const QQuickItem::ItemChangeData &value)
{
    Q_D(QQuickTextArea);
    QQuickTextEdit::itemChange(change, value);
    switch (change) {
    case ItemEnabledHasChanged:
        break;
    case ItemSceneChange:
    case ItemParentHasChanged:
        if ((change == ItemParentHasChanged && value.item) || (change == ItemSceneChange && value.window)) {
            d->resolveFont();
#if QT_CONFIG(quicktemplates2_hover)
            if (!d->explicitHoverEnabled)
                d->updateHoverEnabled(QQuickControlPrivate::calcHoverEnabled(d->parentItem), false); // explicit=false
#endif
            if (change == ItemParentHasChanged) {
                QQuickFlickable *flickable = qobject_cast<QQuickFlickable *>(value.item->parentItem());
                if (flickable) {
                    QQuickScrollView *scrollView = qobject_cast<QQuickScrollView *>(flickable->parentItem());
                    if (scrollView)
                        d->attachFlickable(flickable);
                }
            }
        }
        break;
    default:
        break;
    }
}
 
void QQuickTextArea::geometryChange(const QRectF &newGeometry, const QRectF &oldGeometry)
{
    Q_D(QQuickTextArea);
    QQuickTextEdit::geometryChange(newGeometry, oldGeometry);
    d->resizeBackground();
}
 
void QQuickTextArea::insetChange(const QMarginsF &newInset, const QMarginsF &oldInset)
{
    Q_D(QQuickTextArea);
    Q_UNUSED(newInset);
    Q_UNUSED(oldInset);
    d->resizeBackground();
}
 
QSGNode *QQuickTextArea::updatePaintNode(QSGNode *oldNode, UpdatePaintNodeData *data)
{
    Q_D(QQuickTextArea);
    QQuickDefaultClipNode *clipNode = static_cast<QQuickDefaultClipNode *>(oldNode);
    if (!clipNode)
        clipNode = new QQuickDefaultClipNode(QRectF());
 
    QQuickItem *clipper = this;
    if (d->flickable)
        clipper = d->flickable;
 
    const QRectF cr = clipper->clipRect().adjusted(
            leftPadding(), topPadding(),
            (!d->cursorItem && effectiveHAlign() == HAlignment::AlignRight ? 1 : 0) - rightPadding(),
            -bottomPadding());
 
    clipNode->setRect(!d->flickable ? cr : cr.translated(d->flickable->contentX(), d->flickable->contentY()));
    clipNode->update();
 
    QSGNode *textNode = QQuickTextEdit::updatePaintNode(clipNode->firstChild(), data);
    if (!textNode->parent())
        clipNode->appendChildNode(textNode);
 
    if (d->cursorItem) {
        QQuickDefaultClipNode *cursorNode = QQuickItemPrivate::get(d->cursorItem)->clipNode();
        if (cursorNode)
            cursorNode->setClipRect(d->cursorItem->mapRectFromItem(clipper, cr));
    }
 
    return clipNode;
}
 
void QQuickTextArea::focusInEvent(QFocusEvent *event)
{
    QQuickTextEdit::focusInEvent(event);
    setFocusReason(event->reason());
}
 
void QQuickTextArea::focusOutEvent(QFocusEvent *event)
{
    QQuickTextEdit::focusOutEvent(event);
    setFocusReason(event->reason());
}
 
#if QT_CONFIG(quicktemplates2_hover)
void QQuickTextArea::hoverEnterEvent(QHoverEvent *event)
{
    Q_D(QQuickTextArea);
    QQuickTextEdit::hoverEnterEvent(event);
    setHovered(d->hoverEnabled);
    event->ignore();
}
 
void QQuickTextArea::hoverLeaveEvent(QHoverEvent *event)
{
    QQuickTextEdit::hoverLeaveEvent(event);
    setHovered(false);
    event->ignore();
}
#endif
 
void QQuickTextArea::mousePressEvent(QMouseEvent *event)
{
    Q_D(QQuickTextArea);
    d->pressHandler.mousePressEvent(event);
    if (d->pressHandler.isActive()) {
        if (d->pressHandler.delayedMousePressEvent) {
            QQuickTextEdit::mousePressEvent(d->pressHandler.delayedMousePressEvent.get());
            d->pressHandler.clearDelayedMouseEvent();
        }
        // Calling the base class implementation will result in QQuickTextControl's
        // press handler being called, which ignores events that aren't Qt::LeftButton.
        const bool wasAccepted = event->isAccepted();
        QQuickTextEdit::mousePressEvent(event);
        if (wasAccepted)
            event->accept();
    }
}
 
void QQuickTextArea::mouseMoveEvent(QMouseEvent *event)
{
    Q_D(QQuickTextArea);
    d->pressHandler.mouseMoveEvent(event);
    if (d->pressHandler.isActive()) {
        if (d->pressHandler.delayedMousePressEvent) {
            QQuickTextEdit::mousePressEvent(d->pressHandler.delayedMousePressEvent.get());
            d->pressHandler.clearDelayedMouseEvent();
        }
        QQuickTextEdit::mouseMoveEvent(event);
    }
}
 
void QQuickTextArea::mouseReleaseEvent(QMouseEvent *event)
{
    Q_D(QQuickTextArea);
    d->pressHandler.mouseReleaseEvent(event);
    if (d->pressHandler.isActive()) {
        if (d->pressHandler.delayedMousePressEvent) {
            QQuickTextEdit::mousePressEvent(d->pressHandler.delayedMousePressEvent.get());
            d->pressHandler.clearDelayedMouseEvent();
        }
        QQuickTextEdit::mouseReleaseEvent(event);
    }
}
 
void QQuickTextArea::mouseDoubleClickEvent(QMouseEvent *event)
{
    Q_D(QQuickTextArea);
    if (d->pressHandler.delayedMousePressEvent) {
        QQuickTextEdit::mousePressEvent(d->pressHandler.delayedMousePressEvent.get());
        d->pressHandler.clearDelayedMouseEvent();
    }
    QQuickTextEdit::mouseDoubleClickEvent(event);
}
 
void QQuickTextArea::timerEvent(QTimerEvent *event)
{
    Q_D(QQuickTextArea);
    if (event->timerId() == d->pressHandler.timer.timerId())
        d->pressHandler.timerEvent(event);
    else
        QQuickTextEdit::timerEvent(event);
}
 
class QQuickTextAreaAttachedPrivate : public QObjectPrivate
{
public:
    QQuickTextArea *control = nullptr;
};
 
QQuickTextAreaAttached::QQuickTextAreaAttached(QObject *parent)
    : QObject(*(new QQuickTextAreaAttachedPrivate), parent)
{
}
 
QQuickTextArea *QQuickTextAreaAttached::flickable() const
{
    Q_D(const QQuickTextAreaAttached);
    return d->control;
}
 
void QQuickTextAreaAttached::setFlickable(QQuickTextArea *control)
{
    Q_D(QQuickTextAreaAttached);
    QQuickFlickable *flickable = qobject_cast<QQuickFlickable *>(parent());
    if (!flickable) {
        qmlWarning(parent()) << "TextArea must be attached to a Flickable";
        return;
    }
 
    if (d->control == control)
        return;
 
    if (d->control)
        QQuickTextAreaPrivate::get(d->control)->detachFlickable();
 
    d->control = control;
 
    if (control)
        QQuickTextAreaPrivate::get(control)->attachFlickable(flickable);
 
    emit flickableChanged();
}
 
QT_END_NAMESPACE
 
#include "moc_qquicktextarea_p.cpp"