qquicktextedit.cpp

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// Copyright (C) 2016 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 "qquicktextedit_p.h"
#include "qquicktextedit_p_p.h"
#include "qquicktextcontrol_p.h"
#include "qquicktextdocument_p.h"
#include "qquickevents_p_p.h"
#include "qquickwindow.h"
#include "qquicktextnode_p.h"
#include "qquicktextnodeengine_p.h"
 
#include <QtCore/qmath.h>
#include <QtGui/qguiapplication.h>
#include <QtGui/qevent.h>
#include <QtGui/qpainter.h>
#include <QtGui/qtextobject.h>
#include <QtGui/qtexttable.h>
#include <QtQml/qqmlinfo.h>
#include <QtQuick/qsgsimplerectnode.h>
 
#include <private/qqmlglobal_p.h>
#include <private/qqmlproperty_p.h>
#include <private/qtextengine_p.h>
#include <private/qsgadaptationlayer_p.h>
 
#include "qquicktextdocument.h"
 
#include <algorithm>
 
QT_BEGIN_NAMESPACE
 
Q_DECLARE_LOGGING_CATEGORY(lcVP)
Q_LOGGING_CATEGORY(lcTextEdit, "qt.quick.textedit")
 
 
// This is a pretty arbitrary figure. The idea is that we don't want to break down the document
// into text nodes corresponding to a text block each so that the glyph node grouping doesn't become pointless.
static const int nodeBreakingSize = 300;
 
#if !defined(QQUICKTEXT_LARGETEXT_THRESHOLD)
  #define QQUICKTEXT_LARGETEXT_THRESHOLD 10000
#endif
// if QString::size() > largeTextSizeThreshold, we render more often, but only visible lines
const int QQuickTextEditPrivate::largeTextSizeThreshold = QQUICKTEXT_LARGETEXT_THRESHOLD;
 
namespace {
    class RootNode : public QSGTransformNode
    {
    public:
        RootNode() : cursorNode(nullptr), frameDecorationsNode(nullptr)
        { }
 
        void resetFrameDecorations(QQuickTextNode* newNode)
        {
            if (frameDecorationsNode) {
                removeChildNode(frameDecorationsNode);
                delete frameDecorationsNode;
            }
            frameDecorationsNode = newNode;
            newNode->setFlag(QSGNode::OwnedByParent);
        }
 
        void resetCursorNode(QSGInternalRectangleNode* newNode)
        {
            if (cursorNode)
                removeChildNode(cursorNode);
            delete cursorNode;
            cursorNode = newNode;
            if (cursorNode) {
                appendChildNode(cursorNode);
                cursorNode->setFlag(QSGNode::OwnedByParent);
            }
        }
 
        QSGInternalRectangleNode *cursorNode;
        QQuickTextNode* frameDecorationsNode;
 
    };
}
 
QQuickTextEdit::QQuickTextEdit(QQuickItem *parent)
: QQuickImplicitSizeItem(*(new QQuickTextEditPrivate), parent)
{
    Q_D(QQuickTextEdit);
    d->init();
}
 
QQuickTextEdit::QQuickTextEdit(QQuickTextEditPrivate &dd, QQuickItem *parent)
: QQuickImplicitSizeItem(dd, parent)
{
    Q_D(QQuickTextEdit);
    d->init();
}
 
QString QQuickTextEdit::text() const
{
    Q_D(const QQuickTextEdit);
    if (!d->textCached && isComponentComplete()) {
        QQuickTextEditPrivate *d = const_cast<QQuickTextEditPrivate *>(d_func());
#if QT_CONFIG(texthtmlparser)
        if (d->richText)
            d->text = d->control->toHtml();
        else
#endif
#if QT_CONFIG(textmarkdownwriter)
        if (d->markdownText)
            d->text = d->control->toMarkdown();
        else
#endif
            d->text = d->control->toPlainText();
        d->textCached = true;
    }
    return d->text;
}
 
void QQuickTextEdit::setText(const QString &text)
{
    Q_D(QQuickTextEdit);
    if (QQuickTextEdit::text() == text)
        return;
 
    d->document->clearResources();
    d->richText = d->format == RichText || (d->format == AutoText && Qt::mightBeRichText(text));
    d->markdownText = d->format == MarkdownText;
    if (!isComponentComplete()) {
        d->text = text;
    } else if (d->richText) {
#if QT_CONFIG(texthtmlparser)
        d->control->setHtml(text);
#else
        d->control->setPlainText(text);
#endif
    } else if (d->markdownText) {
        d->control->setMarkdownText(text);
    } else {
        d->control->setPlainText(text);
    }
    setFlag(QQuickItem::ItemObservesViewport, text.size() > QQuickTextEditPrivate::largeTextSizeThreshold);
}
 
void QQuickTextEdit::invalidate()
{
    QMetaObject::invokeMethod(this, &QQuickTextEdit::q_invalidate);
}
 
void QQuickTextEdit::q_invalidate()
{
    Q_D(QQuickTextEdit);
    if (isComponentComplete()) {
        if (d->document != nullptr)
            d->document->markContentsDirty(0, d->document->characterCount());
        invalidateFontCaches();
        d->updateType = QQuickTextEditPrivate::UpdateAll;
        update();
    }
}
 
QString QQuickTextEdit::preeditText() const
{
    Q_D(const QQuickTextEdit);
    return d->control->preeditText();
}
 
QQuickTextEdit::TextFormat QQuickTextEdit::textFormat() const
{
    Q_D(const QQuickTextEdit);
    return d->format;
}
 
void QQuickTextEdit::setTextFormat(TextFormat format)
{
    Q_D(QQuickTextEdit);
    if (format == d->format)
        return;
 
    const bool wasRich = d->richText;
    const bool wasMarkdown = d->markdownText;
    d->richText = format == RichText || (format == AutoText && (wasRich || Qt::mightBeRichText(text())));
    d->markdownText = format == MarkdownText;
 
    if (isComponentComplete()) {
#if QT_CONFIG(texthtmlparser)
        if (wasRich && !d->richText && !d->markdownText) {
            d->control->setPlainText(!d->textCached ? d->control->toHtml() : d->text);
            updateSize();
        } else if (!wasRich && d->richText) {
            d->control->setHtml(!d->textCached ? d->control->toPlainText() : d->text);
            updateSize();
        }
#endif
#if QT_CONFIG(textmarkdownwriter) && QT_CONFIG(textmarkdownreader)
        if (wasMarkdown && !d->markdownText && !d->richText) {
            d->control->setPlainText(!d->textCached ? d->control->toMarkdown() : d->text);
            updateSize();
        } else if (!wasMarkdown && d->markdownText) {
            d->control->setMarkdownText(!d->textCached ? d->control->toPlainText() : d->text);
            updateSize();
        }
#endif
    }
 
    d->format = format;
    d->control->setAcceptRichText(d->format != PlainText);
    emit textFormatChanged(d->format);
}
 
QQuickTextEdit::RenderType QQuickTextEdit::renderType() const
{
    Q_D(const QQuickTextEdit);
    return d->renderType;
}
 
void QQuickTextEdit::setRenderType(QQuickTextEdit::RenderType renderType)
{
    Q_D(QQuickTextEdit);
    if (d->renderType == renderType)
        return;
 
    d->renderType = renderType;
    emit renderTypeChanged();
    d->updateDefaultTextOption();
 
    if (isComponentComplete())
        updateSize();
}
 
QFont QQuickTextEdit::font() const
{
    Q_D(const QQuickTextEdit);
    return d->sourceFont;
}
 
void QQuickTextEdit::setFont(const QFont &font)
{
    Q_D(QQuickTextEdit);
    if (d->sourceFont == font)
        return;
 
    d->sourceFont = font;
    QFont oldFont = d->font;
    d->font = font;
    if (d->font.pointSizeF() != -1) {
        // 0.5pt resolution
        qreal size = qRound(d->font.pointSizeF()*2.0);
        d->font.setPointSizeF(size/2.0);
    }
 
    if (oldFont != d->font) {
        d->document->setDefaultFont(d->font);
        if (d->cursorItem) {
            d->cursorItem->setHeight(QFontMetrics(d->font).height());
            moveCursorDelegate();
        }
        updateSize();
        updateWholeDocument();
#if QT_CONFIG(im)
        updateInputMethod(Qt::ImCursorRectangle | Qt::ImAnchorRectangle | Qt::ImFont);
#endif
    }
    emit fontChanged(d->sourceFont);
}
 
QColor QQuickTextEdit::color() const
{
    Q_D(const QQuickTextEdit);
    return d->color;
}
 
void QQuickTextEdit::setColor(const QColor &color)
{
    Q_D(QQuickTextEdit);
    if (d->color == color)
        return;
 
    d->color = color;
    updateWholeDocument();
    emit colorChanged(d->color);
}
 
QColor QQuickTextEdit::selectionColor() const
{
    Q_D(const QQuickTextEdit);
    return d->selectionColor;
}
 
void QQuickTextEdit::setSelectionColor(const QColor &color)
{
    Q_D(QQuickTextEdit);
    if (d->selectionColor == color)
        return;
 
    d->selectionColor = color;
    updateWholeDocument();
    emit selectionColorChanged(d->selectionColor);
}
 
QColor QQuickTextEdit::selectedTextColor() const
{
    Q_D(const QQuickTextEdit);
    return d->selectedTextColor;
}
 
void QQuickTextEdit::setSelectedTextColor(const QColor &color)
{
    Q_D(QQuickTextEdit);
    if (d->selectedTextColor == color)
        return;
 
    d->selectedTextColor = color;
    updateWholeDocument();
    emit selectedTextColorChanged(d->selectedTextColor);
}
 
QQuickTextEdit::HAlignment QQuickTextEdit::hAlign() const
{
    Q_D(const QQuickTextEdit);
    return d->hAlign;
}
 
void QQuickTextEdit::setHAlign(HAlignment align)
{
    Q_D(QQuickTextEdit);
    bool forceAlign = d->hAlignImplicit && d->effectiveLayoutMirror;
    d->hAlignImplicit = false;
    if (d->setHAlign(align, forceAlign) && isComponentComplete()) {
        d->updateDefaultTextOption();
        updateSize();
    }
}
 
void QQuickTextEdit::resetHAlign()
{
    Q_D(QQuickTextEdit);
    d->hAlignImplicit = true;
    if (d->determineHorizontalAlignment() && isComponentComplete()) {
        d->updateDefaultTextOption();
        updateSize();
    }
}
 
QQuickTextEdit::HAlignment QQuickTextEdit::effectiveHAlign() const
{
    Q_D(const QQuickTextEdit);
    QQuickTextEdit::HAlignment effectiveAlignment = d->hAlign;
    if (!d->hAlignImplicit && d->effectiveLayoutMirror) {
        switch (d->hAlign) {
        case QQuickTextEdit::AlignLeft:
            effectiveAlignment = QQuickTextEdit::AlignRight;
            break;
        case QQuickTextEdit::AlignRight:
            effectiveAlignment = QQuickTextEdit::AlignLeft;
            break;
        default:
            break;
        }
    }
    return effectiveAlignment;
}
 
bool QQuickTextEditPrivate::setHAlign(QQuickTextEdit::HAlignment alignment, bool forceAlign)
{
    Q_Q(QQuickTextEdit);
    if (hAlign != alignment || forceAlign) {
        QQuickTextEdit::HAlignment oldEffectiveHAlign = q->effectiveHAlign();
        hAlign = alignment;
        emit q->horizontalAlignmentChanged(alignment);
        if (oldEffectiveHAlign != q->effectiveHAlign())
            emit q->effectiveHorizontalAlignmentChanged();
        return true;
    }
    return false;
}
 
 
Qt::LayoutDirection QQuickTextEditPrivate::textDirection(const QString &text) const
{
    const QChar *character = text.constData();
    while (!character->isNull()) {
        switch (character->direction()) {
        case QChar::DirL:
            return Qt::LeftToRight;
        case QChar::DirR:
        case QChar::DirAL:
        case QChar::DirAN:
            return Qt::RightToLeft;
        default:
            break;
        }
        character++;
    }
    return Qt::LayoutDirectionAuto;
}
 
bool QQuickTextEditPrivate::determineHorizontalAlignment()
{
    Q_Q(QQuickTextEdit);
    if (hAlignImplicit && q->isComponentComplete()) {
        Qt::LayoutDirection direction = contentDirection;
#if QT_CONFIG(im)
        if (direction == Qt::LayoutDirectionAuto) {
            const QString preeditText = control->textCursor().block().layout()->preeditAreaText();
            direction = textDirection(preeditText);
        }
        if (direction == Qt::LayoutDirectionAuto)
            direction = qGuiApp->inputMethod()->inputDirection();
#endif
 
        return setHAlign(direction == Qt::RightToLeft ? QQuickTextEdit::AlignRight : QQuickTextEdit::AlignLeft);
    }
    return false;
}
 
void QQuickTextEditPrivate::mirrorChange()
{
    Q_Q(QQuickTextEdit);
    if (q->isComponentComplete()) {
        if (!hAlignImplicit && (hAlign == QQuickTextEdit::AlignRight || hAlign == QQuickTextEdit::AlignLeft)) {
            updateDefaultTextOption();
            q->updateSize();
            emit q->effectiveHorizontalAlignmentChanged();
        }
    }
}
 
bool QQuickTextEditPrivate::transformChanged(QQuickItem *transformedItem)
{
    Q_Q(QQuickTextEdit);
    qCDebug(lcVP) << q << "sees that" << transformedItem << "moved in VP" << q->clipRect();
 
    // If there's a lot of text, and the TextEdit has been scrolled so that the viewport
    // no longer completely covers the rendered region, we need QQuickTextEdit::updatePaintNode()
    // to re-iterate blocks and populate a different range.
    if (flags & QQuickItem::ItemObservesViewport) {
        if (QQuickItem *viewport = q->viewportItem()) {
            QRectF vp = q->mapRectFromItem(viewport, viewport->clipRect());
            if (!(vp.top() > renderedRegion.top() && vp.bottom() < renderedRegion.bottom())) {
                qCDebug(lcVP) << "viewport" << vp << "now goes beyond rendered region" << renderedRegion << "; updating";
                q->updateWholeDocument();
            }
            const bool textCursorVisible = cursorVisible && q->cursorRectangle().intersects(vp);
            if (cursorItem)
                cursorItem->setVisible(textCursorVisible);
            else
                control->setCursorVisible(textCursorVisible);
        }
    }
    return QQuickImplicitSizeItemPrivate::transformChanged(transformedItem);
}
 
#if QT_CONFIG(im)
Qt::InputMethodHints QQuickTextEditPrivate::effectiveInputMethodHints() const
{
    return inputMethodHints | Qt::ImhMultiLine;
}
#endif
 
void QQuickTextEditPrivate::setTopPadding(qreal value, bool reset)
{
    Q_Q(QQuickTextEdit);
    qreal oldPadding = q->topPadding();
    if (!reset || extra.isAllocated()) {
        extra.value().topPadding = value;
        extra.value().explicitTopPadding = !reset;
    }
    if ((!reset && !qFuzzyCompare(oldPadding, value)) || (reset && !qFuzzyCompare(oldPadding, padding()))) {
        q->updateSize();
        q->updateWholeDocument();
        emit q->topPaddingChanged();
    }
}
 
void QQuickTextEditPrivate::setLeftPadding(qreal value, bool reset)
{
    Q_Q(QQuickTextEdit);
    qreal oldPadding = q->leftPadding();
    if (!reset || extra.isAllocated()) {
        extra.value().leftPadding = value;
        extra.value().explicitLeftPadding = !reset;
    }
    if ((!reset && !qFuzzyCompare(oldPadding, value)) || (reset && !qFuzzyCompare(oldPadding, padding()))) {
        q->updateSize();
        q->updateWholeDocument();
        emit q->leftPaddingChanged();
    }
}
 
void QQuickTextEditPrivate::setRightPadding(qreal value, bool reset)
{
    Q_Q(QQuickTextEdit);
    qreal oldPadding = q->rightPadding();
    if (!reset || extra.isAllocated()) {
        extra.value().rightPadding = value;
        extra.value().explicitRightPadding = !reset;
    }
    if ((!reset && !qFuzzyCompare(oldPadding, value)) || (reset && !qFuzzyCompare(oldPadding, padding()))) {
        q->updateSize();
        q->updateWholeDocument();
        emit q->rightPaddingChanged();
    }
}
 
void QQuickTextEditPrivate::setBottomPadding(qreal value, bool reset)
{
    Q_Q(QQuickTextEdit);
    qreal oldPadding = q->bottomPadding();
    if (!reset || extra.isAllocated()) {
        extra.value().bottomPadding = value;
        extra.value().explicitBottomPadding = !reset;
    }
    if ((!reset && !qFuzzyCompare(oldPadding, value)) || (reset && !qFuzzyCompare(oldPadding, padding()))) {
        q->updateSize();
        q->updateWholeDocument();
        emit q->bottomPaddingChanged();
    }
}
 
bool QQuickTextEditPrivate::isImplicitResizeEnabled() const
{
    return !extra.isAllocated() || extra->implicitResize;
}
 
void QQuickTextEditPrivate::setImplicitResizeEnabled(bool enabled)
{
    if (!enabled)
        extra.value().implicitResize = false;
    else if (extra.isAllocated())
        extra->implicitResize = true;
}
 
QQuickTextEdit::VAlignment QQuickTextEdit::vAlign() const
{
    Q_D(const QQuickTextEdit);
    return d->vAlign;
}
 
void QQuickTextEdit::setVAlign(QQuickTextEdit::VAlignment alignment)
{
    Q_D(QQuickTextEdit);
    if (alignment == d->vAlign)
        return;
    d->vAlign = alignment;
    d->updateDefaultTextOption();
    updateSize();
    moveCursorDelegate();
    emit verticalAlignmentChanged(d->vAlign);
}
 
QQuickTextEdit::WrapMode QQuickTextEdit::wrapMode() const
{
    Q_D(const QQuickTextEdit);
    return d->wrapMode;
}
 
void QQuickTextEdit::setWrapMode(WrapMode mode)
{
    Q_D(QQuickTextEdit);
    if (mode == d->wrapMode)
        return;
    d->wrapMode = mode;
    d->updateDefaultTextOption();
    updateSize();
    emit wrapModeChanged();
}
 
int QQuickTextEdit::lineCount() const
{
    Q_D(const QQuickTextEdit);
    return d->lineCount;
}
 
int QQuickTextEdit::length() const
{
    Q_D(const QQuickTextEdit);
    // QTextDocument::characterCount() includes the terminating null character.
    return qMax(0, d->document->characterCount() - 1);
}
 
qreal QQuickTextEdit::contentWidth() const
{
    Q_D(const QQuickTextEdit);
    return d->contentSize.width();
}
 
qreal QQuickTextEdit::contentHeight() const
{
    Q_D(const QQuickTextEdit);
    return d->contentSize.height();
}
 
QUrl QQuickTextEdit::baseUrl() const
{
    Q_D(const QQuickTextEdit);
    if (d->baseUrl.isEmpty()) {
        if (QQmlContext *context = qmlContext(this))
            const_cast<QQuickTextEditPrivate *>(d)->baseUrl = context->baseUrl();
    }
    return d->baseUrl;
}
 
void QQuickTextEdit::setBaseUrl(const QUrl &url)
{
    Q_D(QQuickTextEdit);
    if (baseUrl() != url) {
        d->baseUrl = url;
 
        d->document->setBaseUrl(url);
        emit baseUrlChanged();
    }
}
 
void QQuickTextEdit::resetBaseUrl()
{
    if (QQmlContext *context = qmlContext(this))
        setBaseUrl(context->baseUrl());
    else
        setBaseUrl(QUrl());
}
 
QRectF QQuickTextEdit::positionToRectangle(int pos) const
{
    Q_D(const QQuickTextEdit);
    QTextCursor c(d->document);
    c.setPosition(pos);
    return d->control->cursorRect(c).translated(d->xoff, d->yoff);
 
}
 
int QQuickTextEdit::positionAt(qreal x, qreal y) const
{
    Q_D(const QQuickTextEdit);
    x -= d->xoff;
    y -= d->yoff;
 
    int r = d->document->documentLayout()->hitTest(QPointF(x, y), Qt::FuzzyHit);
#if QT_CONFIG(im)
    QTextCursor cursor = d->control->textCursor();
    if (r > cursor.position()) {
        // The cursor position includes positions within the preedit text, but only positions in the
        // same text block are offset so it is possible to get a position that is either part of the
        // preedit or the next text block.
        QTextLayout *layout = cursor.block().layout();
        const int preeditLength = layout
                ? layout->preeditAreaText().size()
                : 0;
        if (preeditLength > 0
                && d->document->documentLayout()->blockBoundingRect(cursor.block()).contains(x, y)) {
            r = r > cursor.position() + preeditLength
                    ? r - preeditLength
                    : cursor.position();
        }
    }
#endif
    return r;
}
 
void QQuickTextEdit::moveCursorSelection(int pos)
{
    //Note that this is the same as setCursorPosition but with the KeepAnchor flag set
    Q_D(QQuickTextEdit);
    QTextCursor cursor = d->control->textCursor();
    if (cursor.position() == pos)
        return;
    cursor.setPosition(pos, QTextCursor::KeepAnchor);
    d->control->setTextCursor(cursor);
}
 
void QQuickTextEdit::moveCursorSelection(int pos, SelectionMode mode)
{
    Q_D(QQuickTextEdit);
    QTextCursor cursor = d->control->textCursor();
    if (cursor.position() == pos)
        return;
    if (mode == SelectCharacters) {
        cursor.setPosition(pos, QTextCursor::KeepAnchor);
    } else if (cursor.anchor() < pos || (cursor.anchor() == pos && cursor.position() < pos)) {
        if (cursor.anchor() > cursor.position()) {
            cursor.setPosition(cursor.anchor(), QTextCursor::MoveAnchor);
            cursor.movePosition(QTextCursor::StartOfWord, QTextCursor::KeepAnchor);
            if (cursor.position() == cursor.anchor())
                cursor.movePosition(QTextCursor::PreviousWord, QTextCursor::MoveAnchor);
            else
                cursor.setPosition(cursor.position(), QTextCursor::MoveAnchor);
        } else {
            cursor.setPosition(cursor.anchor(), QTextCursor::MoveAnchor);
            cursor.movePosition(QTextCursor::StartOfWord, QTextCursor::MoveAnchor);
        }
 
        cursor.setPosition(pos, QTextCursor::KeepAnchor);
        cursor.movePosition(QTextCursor::StartOfWord, QTextCursor::KeepAnchor);
        if (cursor.position() != pos)
            cursor.movePosition(QTextCursor::EndOfWord, QTextCursor::KeepAnchor);
    } else if (cursor.anchor() > pos || (cursor.anchor() == pos && cursor.position() > pos)) {
        if (cursor.anchor() < cursor.position()) {
            cursor.setPosition(cursor.anchor(), QTextCursor::MoveAnchor);
            cursor.movePosition(QTextCursor::EndOfWord, QTextCursor::MoveAnchor);
        } else {
            cursor.setPosition(cursor.anchor(), QTextCursor::MoveAnchor);
            cursor.movePosition(QTextCursor::PreviousCharacter, QTextCursor::KeepAnchor);
            cursor.movePosition(QTextCursor::EndOfWord, QTextCursor::KeepAnchor);
            if (cursor.position() != cursor.anchor()) {
                cursor.setPosition(cursor.anchor(), QTextCursor::MoveAnchor);
                cursor.movePosition(QTextCursor::EndOfWord, QTextCursor::MoveAnchor);
            }
        }
 
        cursor.setPosition(pos, QTextCursor::KeepAnchor);
        cursor.movePosition(QTextCursor::EndOfWord, QTextCursor::KeepAnchor);
        if (cursor.position() != pos) {
            cursor.movePosition(QTextCursor::PreviousCharacter, QTextCursor::KeepAnchor);
            cursor.movePosition(QTextCursor::StartOfWord, QTextCursor::KeepAnchor);
        }
    }
    d->control->setTextCursor(cursor);
}
 
bool QQuickTextEdit::isCursorVisible() const
{
    Q_D(const QQuickTextEdit);
    return d->cursorVisible;
}
 
void QQuickTextEdit::setCursorVisible(bool on)
{
    Q_D(QQuickTextEdit);
    if (d->cursorVisible == on)
        return;
    d->cursorVisible = on;
    if (on && isComponentComplete())
        QQuickTextUtil::createCursor(d);
    if (!on && !d->persistentSelection)
        d->control->setCursorIsFocusIndicator(true);
    d->control->setCursorVisible(on);
    emit cursorVisibleChanged(d->cursorVisible);
}
 
int QQuickTextEdit::cursorPosition() const
{
    Q_D(const QQuickTextEdit);
    return d->control->textCursor().position();
}
 
void QQuickTextEdit::setCursorPosition(int pos)
{
    Q_D(QQuickTextEdit);
    if (pos < 0 || pos >= d->document->characterCount()) // characterCount includes the terminating null.
        return;
    QTextCursor cursor = d->control->textCursor();
    if (cursor.position() == pos && cursor.anchor() == pos)
        return;
    cursor.setPosition(pos);
    d->control->setTextCursor(cursor);
    d->control->updateCursorRectangle(true);
}
 
QQmlComponent* QQuickTextEdit::cursorDelegate() const
{
    Q_D(const QQuickTextEdit);
    return d->cursorComponent;
}
 
void QQuickTextEdit::setCursorDelegate(QQmlComponent* c)
{
    Q_D(QQuickTextEdit);
    QQuickTextUtil::setCursorDelegate(d, c);
}
 
void QQuickTextEdit::createCursor()
{
    Q_D(QQuickTextEdit);
    d->cursorPending = true;
    QQuickTextUtil::createCursor(d);
}
 
int QQuickTextEdit::selectionStart() const
{
    Q_D(const QQuickTextEdit);
    return d->control->textCursor().selectionStart();
}
 
int QQuickTextEdit::selectionEnd() const
{
    Q_D(const QQuickTextEdit);
    return d->control->textCursor().selectionEnd();
}
 
QString QQuickTextEdit::selectedText() const
{
    Q_D(const QQuickTextEdit);
#if QT_CONFIG(texthtmlparser)
    return d->richText || d->markdownText
            ? d->control->textCursor().selectedText()
            : d->control->textCursor().selection().toPlainText();
#else
    return d->control->textCursor().selection().toPlainText();
#endif
}
 
bool QQuickTextEdit::focusOnPress() const
{
    Q_D(const QQuickTextEdit);
    return d->focusOnPress;
}
 
void QQuickTextEdit::setFocusOnPress(bool on)
{
    Q_D(QQuickTextEdit);
    if (d->focusOnPress == on)
        return;
    d->focusOnPress = on;
    emit activeFocusOnPressChanged(d->focusOnPress);
}
 
bool QQuickTextEdit::persistentSelection() const
{
    Q_D(const QQuickTextEdit);
    return d->persistentSelection;
}
 
void QQuickTextEdit::setPersistentSelection(bool on)
{
    Q_D(QQuickTextEdit);
    if (d->persistentSelection == on)
        return;
    d->persistentSelection = on;
    emit persistentSelectionChanged(d->persistentSelection);
}
 
qreal QQuickTextEdit::textMargin() const
{
    Q_D(const QQuickTextEdit);
    return d->textMargin;
}
 
void QQuickTextEdit::setTextMargin(qreal margin)
{
    Q_D(QQuickTextEdit);
    if (d->textMargin == margin)
        return;
    d->textMargin = margin;
    d->document->setDocumentMargin(d->textMargin);
    emit textMarginChanged(d->textMargin);
}
 
Qt::InputMethodHints QQuickTextEdit::inputMethodHints() const
{
#if !QT_CONFIG(im)
    return Qt::ImhNone;
#else
    Q_D(const QQuickTextEdit);
    return d->inputMethodHints;
#endif // im
}
 
void QQuickTextEdit::setInputMethodHints(Qt::InputMethodHints hints)
{
#if !QT_CONFIG(im)
    Q_UNUSED(hints);
#else
    Q_D(QQuickTextEdit);
 
    if (hints == d->inputMethodHints)
        return;
 
    d->inputMethodHints = hints;
    updateInputMethod(Qt::ImHints);
    emit inputMethodHintsChanged();
#endif // im
}
 
void QQuickTextEdit::geometryChange(const QRectF &newGeometry, const QRectF &oldGeometry)
{
    Q_D(QQuickTextEdit);
    if (!d->inLayout && ((newGeometry.width() != oldGeometry.width() && widthValid())
        || (newGeometry.height() != oldGeometry.height() && heightValid()))) {
        updateSize();
        updateWholeDocument();
        moveCursorDelegate();
    }
    QQuickImplicitSizeItem::geometryChange(newGeometry, oldGeometry);
 
}
 
void QQuickTextEdit::componentComplete()
{
    Q_D(QQuickTextEdit);
    QQuickImplicitSizeItem::componentComplete();
 
    const QUrl url = baseUrl();
    const QQmlContext *context = qmlContext(this);
    d->document->setBaseUrl(context ? context->resolvedUrl(url) : url);
#if QT_CONFIG(texthtmlparser)
    if (d->richText)
        d->control->setHtml(d->text);
    else
#endif
#if QT_CONFIG(textmarkdownreader)
    if (d->markdownText)
        d->control->setMarkdownText(d->text);
    else
#endif
    if (!d->text.isEmpty()) {
        if (d->markdownText)
            d->control->setMarkdownText(d->text);
        else
            d->control->setPlainText(d->text);
    }
 
    if (d->dirty) {
        d->determineHorizontalAlignment();
        d->updateDefaultTextOption();
        updateSize();
        d->dirty = false;
    }
    if (d->cursorComponent && isCursorVisible())
        QQuickTextUtil::createCursor(d);
    polish();
}
 
bool QQuickTextEdit::selectByKeyboard() const
{
    Q_D(const QQuickTextEdit);
    if (d->selectByKeyboardSet)
        return d->selectByKeyboard;
    return !isReadOnly();
}
 
void QQuickTextEdit::setSelectByKeyboard(bool on)
{
    Q_D(QQuickTextEdit);
    bool was = selectByKeyboard();
    if (!d->selectByKeyboardSet || was != on) {
        d->selectByKeyboardSet = true;
        d->selectByKeyboard = on;
        if (on)
            d->control->setTextInteractionFlags(d->control->textInteractionFlags() | Qt::TextSelectableByKeyboard);
        else
            d->control->setTextInteractionFlags(d->control->textInteractionFlags() & ~Qt::TextSelectableByKeyboard);
        emit selectByKeyboardChanged(on);
    }
}
 
bool QQuickTextEdit::selectByMouse() const
{
    Q_D(const QQuickTextEdit);
    return d->selectByMouse;
}
 
void QQuickTextEdit::setSelectByMouse(bool on)
{
    Q_D(QQuickTextEdit);
    if (d->selectByMouse == on)
        return;
 
    d->selectByMouse = on;
    setKeepMouseGrab(on);
    if (on)
        d->control->setTextInteractionFlags(d->control->textInteractionFlags() | Qt::TextSelectableByMouse);
    else
        d->control->setTextInteractionFlags(d->control->textInteractionFlags() & ~Qt::TextSelectableByMouse);
 
#if QT_CONFIG(cursor)
    d->updateMouseCursorShape();
#endif
    emit selectByMouseChanged(on);
}
 
QQuickTextEdit::SelectionMode QQuickTextEdit::mouseSelectionMode() const
{
    Q_D(const QQuickTextEdit);
    return d->mouseSelectionMode;
}
 
void QQuickTextEdit::setMouseSelectionMode(SelectionMode mode)
{
    Q_D(QQuickTextEdit);
    if (d->mouseSelectionMode != mode) {
        d->mouseSelectionMode = mode;
        d->control->setWordSelectionEnabled(mode == SelectWords);
        emit mouseSelectionModeChanged(mode);
    }
}
 
void QQuickTextEdit::setReadOnly(bool r)
{
    Q_D(QQuickTextEdit);
    if (r == isReadOnly())
        return;
 
#if QT_CONFIG(im)
    setFlag(QQuickItem::ItemAcceptsInputMethod, !r);
#endif
    Qt::TextInteractionFlags flags = Qt::LinksAccessibleByMouse;
    if (d->selectByMouse)
        flags = flags | Qt::TextSelectableByMouse;
    if (d->selectByKeyboardSet && d->selectByKeyboard)
        flags = flags | Qt::TextSelectableByKeyboard;
    else if (!d->selectByKeyboardSet && !r)
        flags = flags | Qt::TextSelectableByKeyboard;
    if (!r)
        flags = flags | Qt::TextEditable;
    d->control->setTextInteractionFlags(flags);
    d->control->moveCursor(QTextCursor::End);
 
#if QT_CONFIG(im)
    updateInputMethod(Qt::ImEnabled);
#endif
#if QT_CONFIG(cursor)
    d->updateMouseCursorShape();
#endif
    q_canPasteChanged();
    emit readOnlyChanged(r);
    if (!d->selectByKeyboardSet)
        emit selectByKeyboardChanged(!r);
    if (r) {
        setCursorVisible(false);
    } else if (hasActiveFocus()) {
        setCursorVisible(true);
    }
}
 
bool QQuickTextEdit::isReadOnly() const
{
    Q_D(const QQuickTextEdit);
    return !(d->control->textInteractionFlags() & Qt::TextEditable);
}
 
QRectF QQuickTextEdit::cursorRectangle() const
{
    Q_D(const QQuickTextEdit);
    return d->control->cursorRect().translated(d->xoff, d->yoff);
}
 
bool QQuickTextEdit::event(QEvent *event)
{
    Q_D(QQuickTextEdit);
    if (event->type() == QEvent::ShortcutOverride) {
        d->control->processEvent(event, QPointF(-d->xoff, -d->yoff));
        if (event->isAccepted())
            return true;
    }
    return QQuickImplicitSizeItem::event(event);
}
 
bool QQuickTextEdit::overwriteMode() const
{
    Q_D(const QQuickTextEdit);
    return d->control->overwriteMode();
}
 
void QQuickTextEdit::setOverwriteMode(bool overwrite)
{
    Q_D(QQuickTextEdit);
    d->control->setOverwriteMode(overwrite);
}
 
void QQuickTextEdit::keyPressEvent(QKeyEvent *event)
{
    Q_D(QQuickTextEdit);
    d->control->processEvent(event, QPointF(-d->xoff, -d->yoff));
    if (!event->isAccepted())
        QQuickImplicitSizeItem::keyPressEvent(event);
}
 
void QQuickTextEdit::keyReleaseEvent(QKeyEvent *event)
{
    Q_D(QQuickTextEdit);
    d->control->processEvent(event, QPointF(-d->xoff, -d->yoff));
    if (!event->isAccepted())
        QQuickImplicitSizeItem::keyReleaseEvent(event);
}
 
void QQuickTextEdit::deselect()
{
    Q_D(QQuickTextEdit);
    QTextCursor c = d->control->textCursor();
    c.clearSelection();
    d->control->setTextCursor(c);
}
 
void QQuickTextEdit::selectAll()
{
    Q_D(QQuickTextEdit);
    d->control->selectAll();
}
 
void QQuickTextEdit::selectWord()
{
    Q_D(QQuickTextEdit);
    QTextCursor c = d->control->textCursor();
    c.select(QTextCursor::WordUnderCursor);
    d->control->setTextCursor(c);
}
 
void QQuickTextEdit::select(int start, int end)
{
    Q_D(QQuickTextEdit);
    if (start < 0 || end < 0 || start >= d->document->characterCount() || end >= d->document->characterCount())
        return;
    QTextCursor cursor = d->control->textCursor();
    cursor.beginEditBlock();
    cursor.setPosition(start, QTextCursor::MoveAnchor);
    cursor.setPosition(end, QTextCursor::KeepAnchor);
    cursor.endEditBlock();
    d->control->setTextCursor(cursor);
 
    // QTBUG-11100
    updateSelection();
#if QT_CONFIG(im)
    updateInputMethod();
#endif
}
 
bool QQuickTextEdit::isRightToLeft(int start, int end)
{
    if (start > end) {
        qmlWarning(this) << "isRightToLeft(start, end) called with the end property being smaller than the start.";
        return false;
    } else {
        return getText(start, end).isRightToLeft();
    }
}
 
#if QT_CONFIG(clipboard)
void QQuickTextEdit::cut()
{
    Q_D(QQuickTextEdit);
    d->control->cut();
}
 
void QQuickTextEdit::copy()
{
    Q_D(QQuickTextEdit);
    d->control->copy();
}
 
void QQuickTextEdit::paste()
{
    Q_D(QQuickTextEdit);
    d->control->paste();
}
#endif // clipboard
 
 
void QQuickTextEdit::undo()
{
    Q_D(QQuickTextEdit);
    d->control->undo();
}
 
void QQuickTextEdit::redo()
{
    Q_D(QQuickTextEdit);
    d->control->redo();
}
 
void QQuickTextEdit::mousePressEvent(QMouseEvent *event)
{
    Q_D(QQuickTextEdit);
    const bool isMouse = QQuickDeliveryAgentPrivate::isEventFromMouseOrTouchpad(event);
    setKeepMouseGrab(d->selectByMouse && isMouse);
    d->control->processEvent(event, QPointF(-d->xoff, -d->yoff));
    if (d->focusOnPress){
        bool hadActiveFocus = hasActiveFocus();
        forceActiveFocus(Qt::MouseFocusReason);
        // re-open input panel on press if already focused
#if QT_CONFIG(im)
        if (hasActiveFocus() && hadActiveFocus && !isReadOnly())
            qGuiApp->inputMethod()->show();
#else
        Q_UNUSED(hadActiveFocus);
#endif
    }
    if (!event->isAccepted())
        QQuickImplicitSizeItem::mousePressEvent(event);
}
 
void QQuickTextEdit::mouseReleaseEvent(QMouseEvent *event)
{
    Q_D(QQuickTextEdit);
    d->control->processEvent(event, QPointF(-d->xoff, -d->yoff));
 
    if (!event->isAccepted())
        QQuickImplicitSizeItem::mouseReleaseEvent(event);
}
 
void QQuickTextEdit::mouseDoubleClickEvent(QMouseEvent *event)
{
    Q_D(QQuickTextEdit);
    d->control->processEvent(event, QPointF(-d->xoff, -d->yoff));
    if (!event->isAccepted())
        QQuickImplicitSizeItem::mouseDoubleClickEvent(event);
}
 
void QQuickTextEdit::mouseMoveEvent(QMouseEvent *event)
{
    Q_D(QQuickTextEdit);
    d->control->processEvent(event, QPointF(-d->xoff, -d->yoff));
    if (!event->isAccepted())
        QQuickImplicitSizeItem::mouseMoveEvent(event);
}
 
#if QT_CONFIG(im)
void QQuickTextEdit::inputMethodEvent(QInputMethodEvent *event)
{
    Q_D(QQuickTextEdit);
    const bool wasComposing = isInputMethodComposing();
    d->control->processEvent(event, QPointF(-d->xoff, -d->yoff));
    setCursorVisible(d->control->cursorVisible());
    if (wasComposing != isInputMethodComposing())
        emit inputMethodComposingChanged();
}
 
QVariant QQuickTextEdit::inputMethodQuery(Qt::InputMethodQuery property, QVariant argument) const
{
    Q_D(const QQuickTextEdit);
 
    QVariant v;
    switch (property) {
    case Qt::ImEnabled:
        v = (bool)(flags() & ItemAcceptsInputMethod);
        break;
    case Qt::ImHints:
        v = (int)d->effectiveInputMethodHints();
        break;
    case Qt::ImInputItemClipRectangle:
        v = QQuickItem::inputMethodQuery(property);
        break;
    case Qt::ImReadOnly:
        v = isReadOnly();
        break;
    default:
        if (property == Qt::ImCursorPosition && !argument.isNull())
            argument = QVariant(argument.toPointF() - QPointF(d->xoff, d->yoff));
        v = d->control->inputMethodQuery(property, argument);
        if (property == Qt::ImCursorRectangle || property == Qt::ImAnchorRectangle)
            v = QVariant(v.toRectF().translated(d->xoff, d->yoff));
        break;
    }
    return v;
}
 
QVariant QQuickTextEdit::inputMethodQuery(Qt::InputMethodQuery property) const
{
    return inputMethodQuery(property, QVariant());
}
#endif // im
 
void QQuickTextEdit::triggerPreprocess()
{
    Q_D(QQuickTextEdit);
    if (d->updateType == QQuickTextEditPrivate::UpdateNone)
        d->updateType = QQuickTextEditPrivate::UpdateOnlyPreprocess;
    polish();
    update();
}
 
typedef QQuickTextEditPrivate::Node TextNode;
using TextNodeIterator = QQuickTextEditPrivate::TextNodeIterator;
 
static inline bool operator<(const TextNode &n1, const TextNode &n2)
{
    return n1.startPos() < n2.startPos();
}
 
static inline void updateNodeTransform(QQuickTextNode* node, const QPointF &topLeft)
{
    QMatrix4x4 transformMatrix;
    transformMatrix.translate(topLeft.x(), topLeft.y());
    node->setMatrix(transformMatrix);
}
 
void QQuickTextEdit::invalidateFontCaches()
{
    Q_D(QQuickTextEdit);
    if (d->document == nullptr)
        return;
 
    QTextBlock block;
    for (block = d->document->firstBlock(); block.isValid(); block = block.next()) {
        if (block.layout() != nullptr && block.layout()->engine() != nullptr)
            block.layout()->engine()->resetFontEngineCache();
    }
}
 
inline void resetEngine(QQuickTextNodeEngine *engine, const QColor& textColor, const QColor& selectedTextColor, const QColor& selectionColor)
{
    *engine = QQuickTextNodeEngine();
    engine->setTextColor(textColor);
    engine->setSelectedTextColor(selectedTextColor);
    engine->setSelectionColor(selectionColor);
}
 
QSGNode *QQuickTextEdit::updatePaintNode(QSGNode *oldNode, UpdatePaintNodeData *updatePaintNodeData)
{
    Q_UNUSED(updatePaintNodeData);
    Q_D(QQuickTextEdit);
 
    if (d->updateType != QQuickTextEditPrivate::UpdatePaintNode
          && d->updateType != QQuickTextEditPrivate::UpdateAll
          && oldNode != nullptr) {
        // Update done in preprocess() in the nodes
        d->updateType = QQuickTextEditPrivate::UpdateNone;
        return oldNode;
    }
 
    if (!oldNode || d->updateType == QQuickTextEditPrivate::UpdateAll) {
        delete oldNode;
        oldNode = nullptr;
 
        // If we had any QQuickTextNode node references, they were deleted along with the root node
        // But here we must delete the Node structures in textNodeMap
        d->textNodeMap.clear();
    }
 
    d->updateType = QQuickTextEditPrivate::UpdateNone;
 
    RootNode *rootNode = static_cast<RootNode *>(oldNode);
    TextNodeIterator nodeIterator = d->textNodeMap.begin();
    std::optional<int> firstPosAcrossAllNodes;
    if (nodeIterator != d->textNodeMap.end())
        firstPosAcrossAllNodes = nodeIterator->startPos();
 
    while (nodeIterator != d->textNodeMap.end() && !nodeIterator->dirty())
        ++nodeIterator;
 
    QQuickTextNodeEngine engine;
    QQuickTextNodeEngine frameDecorationsEngine;
 
    if (!oldNode || nodeIterator < d->textNodeMap.end() || d->textNodeMap.isEmpty()) {
 
        if (!oldNode)
            rootNode = new RootNode;
 
        int firstDirtyPos = 0;
        if (nodeIterator != d->textNodeMap.end()) {
            firstDirtyPos = nodeIterator->startPos();
            // ### this could be optimized if the first and last dirty nodes are not connected
            // as the intermediate text nodes would usually only need to be transformed differently.
            QQuickTextNode *firstCleanNode = nullptr;
            auto it = d->textNodeMap.constEnd();
            while (it != nodeIterator) {
                --it;
                if (it->dirty())
                    break;
                firstCleanNode = it->textNode();
            }
            do {
                rootNode->removeChildNode(nodeIterator->textNode());
                delete nodeIterator->textNode();
                nodeIterator = d->textNodeMap.erase(nodeIterator);
            } while (nodeIterator != d->textNodeMap.constEnd() && nodeIterator->textNode() != firstCleanNode);
        }
 
        // If there's a lot of text, insert only the range of blocks that can possibly be visible within the viewport.
        QRectF viewport;
        if (flags().testFlag(QQuickItem::ItemObservesViewport)) {
            viewport = clipRect();
            qCDebug(lcVP) << "text viewport" << viewport;
        }
 
        // FIXME: the text decorations could probably be handled separately (only updated for affected textFrames)
        rootNode->resetFrameDecorations(d->createTextNode());
        resetEngine(&frameDecorationsEngine, d->color, d->selectedTextColor, d->selectionColor);
 
        QQuickTextNode *node = nullptr;
 
        int currentNodeSize = 0;
        int nodeStart = firstDirtyPos;
        QPointF basePosition(d->xoff, d->yoff);
        QMatrix4x4 basePositionMatrix;
        basePositionMatrix.translate(basePosition.x(), basePosition.y());
        rootNode->setMatrix(basePositionMatrix);
 
        QPointF nodeOffset;
        const TextNode firstCleanNode = (nodeIterator != d->textNodeMap.end()) ? *nodeIterator
                                                                               : TextNode();
 
        QList<QTextFrame *> frames;
        frames.append(d->document->rootFrame());
 
 
        d->firstBlockInViewport = -1;
        d->firstBlockPastViewport = -1;
        while (!frames.isEmpty()) {
            QTextFrame *textFrame = frames.takeFirst();
            frames.append(textFrame->childFrames());
            frameDecorationsEngine.addFrameDecorations(d->document, textFrame);
 
            if (textFrame->lastPosition() < firstDirtyPos
                    || textFrame->firstPosition() >= firstCleanNode.startPos())
                continue;
            resetEngine(&engine, d->color, d->selectedTextColor, d->selectionColor);
 
            if (textFrame->firstPosition() > textFrame->lastPosition()
                    && textFrame->frameFormat().position() != QTextFrameFormat::InFlow) {
                node = d->createTextNode();
                updateNodeTransform(node, d->document->documentLayout()->frameBoundingRect(textFrame).topLeft());
                const int pos = textFrame->firstPosition() - 1;
                auto *a = static_cast<QtPrivate::ProtectedLayoutAccessor *>(d->document->documentLayout());
                QTextCharFormat format = a->formatAccessor(pos);
                QTextBlock block = textFrame->firstCursorPosition().block();
                nodeOffset = d->document->documentLayout()->blockBoundingRect(block).topLeft();
                bool inView = true;
                if (!viewport.isNull() && block.layout()) {
                    QRectF coveredRegion = block.layout()->boundingRect().adjusted(nodeOffset.x(), nodeOffset.y(), nodeOffset.x(), nodeOffset.y());
                    inView = coveredRegion.bottom() >= viewport.top() && coveredRegion.top() <= viewport.bottom();
                    qCDebug(lcVP) << "non-flow frame" << coveredRegion << "in viewport?" << inView;
                }
                if (inView) {
                    engine.setCurrentLine(block.layout()->lineForTextPosition(pos - block.position()));
                    engine.addTextObject(block, QPointF(0, 0), format, QQuickTextNodeEngine::Unselected, d->document,
                                                  pos, textFrame->frameFormat().position());
                }
                nodeStart = pos;
            } else {
                // Having nodes spanning across frame boundaries will break the current bookkeeping mechanism. We need to prevent that.
                QList<int> frameBoundaries;
                frameBoundaries.reserve(frames.size());
                for (QTextFrame *frame : std::as_const(frames))
                    frameBoundaries.append(frame->firstPosition());
                std::sort(frameBoundaries.begin(), frameBoundaries.end());
 
                QTextFrame::iterator it = textFrame->begin();
                while (!it.atEnd()) {
                    QTextBlock block = it.currentBlock();
                    if (block.position() < firstDirtyPos) {
                        ++it;
                        continue;
                    }
 
                    if (!engine.hasContents())
                        nodeOffset = d->document->documentLayout()->blockBoundingRect(block).topLeft();
 
                    bool inView = true;
                    if (!viewport.isNull()) {
                        QRectF coveredRegion;
                        if (block.layout()) {
                            coveredRegion = block.layout()->boundingRect().adjusted(nodeOffset.x(), nodeOffset.y(), nodeOffset.x(), nodeOffset.y());
                            inView = coveredRegion.bottom() > viewport.top();
                        }
                        const bool potentiallyScrollingBackwards = firstPosAcrossAllNodes && *firstPosAcrossAllNodes == firstDirtyPos;
                        if (d->firstBlockInViewport < 0 && inView && potentiallyScrollingBackwards) {
                            // During backward scrolling, we need to iterate backwards from textNodeMap.begin() to fill the top of the viewport.
                            if (coveredRegion.top() > viewport.top() + 1) {
                                qCDebug(lcVP) << "checking backwards from block" << block.blockNumber() << "@" << nodeOffset.y() << coveredRegion;
                                while (it != textFrame->begin() && it.currentBlock().layout() &&
                                       it.currentBlock().layout()->boundingRect().top() + nodeOffset.y() > viewport.top()) {
                                    nodeOffset = d->document->documentLayout()->blockBoundingRect(it.currentBlock()).topLeft();
                                    --it;
                                }
                                if (!it.currentBlock().layout())
                                    ++it;
                                if (Q_LIKELY(it.currentBlock().layout())) {
                                    block = it.currentBlock();
                                    coveredRegion = block.layout()->boundingRect().adjusted(nodeOffset.x(), nodeOffset.y(), nodeOffset.x(), nodeOffset.y());
                                    firstDirtyPos = it.currentBlock().position();
                                } else {
                                    qCWarning(lcVP) << "failed to find a text block with layout during back-scrolling";
                                }
                            }
                            qCDebug(lcVP) << "first block in viewport" << block.blockNumber() << "@" << nodeOffset.y() << coveredRegion;
                            d->firstBlockInViewport = block.blockNumber();
                            if (block.layout())
                                d->renderedRegion = coveredRegion;
                        } else {
                            if (nodeOffset.y() > viewport.bottom()) {
                                inView = false;
                                if (d->firstBlockInViewport >= 0 && d->firstBlockPastViewport < 0) {
                                    qCDebug(lcVP) << "first block past viewport" << viewport << block.blockNumber()
                                                  << "@" << nodeOffset.y() << "total region rendered" << d->renderedRegion;
                                    d->firstBlockPastViewport = block.blockNumber();
                                }
                                break; // skip rest of blocks in this frame
                            }
                            if (inView && !block.text().isEmpty() && coveredRegion.isValid())
                                d->renderedRegion = d->renderedRegion.united(coveredRegion);
                        }
                    }
 
                    bool createdNodeInView = false;
                    if (inView) {
                        if (!engine.hasContents()) {
                            if (node && !node->parent())
                                d->addCurrentTextNodeToRoot(&engine, rootNode, node, nodeIterator, nodeStart);
                            node = d->createTextNode();
                            createdNodeInView = true;
                            updateNodeTransform(node, nodeOffset);
                            nodeStart = block.position();
                        }
                        engine.addTextBlock(d->document, block, -nodeOffset, d->color, QColor(), selectionStart(), selectionEnd() - 1);
                        currentNodeSize += block.length();
                    }
 
                    if ((it.atEnd()) || block.next().position() >= firstCleanNode.startPos())
                        break; // last node that needed replacing or last block of the frame
                    QList<int>::const_iterator lowerBound = std::lower_bound(frameBoundaries.constBegin(), frameBoundaries.constEnd(), block.next().position());
                    if (node && (currentNodeSize > nodeBreakingSize || lowerBound == frameBoundaries.constEnd() || *lowerBound > nodeStart)) {
                        currentNodeSize = 0;
                        if (!node->parent())
                            d->addCurrentTextNodeToRoot(&engine, rootNode, node, nodeIterator, nodeStart);
                        if (!createdNodeInView)
                            node = d->createTextNode();
                        resetEngine(&engine, d->color, d->selectedTextColor, d->selectionColor);
                        nodeStart = block.next().position();
                    }
                    ++it;
                } // loop over blocks in frame
            }
            if (Q_LIKELY(node && !node->parent()))
                d->addCurrentTextNodeToRoot(&engine, rootNode, node, nodeIterator, nodeStart);
        }
        frameDecorationsEngine.addToSceneGraph(rootNode->frameDecorationsNode, QQuickText::Normal, QColor());
        // Now prepend the frame decorations since we want them rendered first, with the text nodes and cursor in front.
        rootNode->prependChildNode(rootNode->frameDecorationsNode);
 
        Q_ASSERT(nodeIterator == d->textNodeMap.end()
                 || (nodeIterator->textNode() == firstCleanNode.textNode()
                     && nodeIterator->startPos() == firstCleanNode.startPos()));
        // Update the position of the subsequent text blocks.
        if (firstCleanNode.textNode() != nullptr) {
            QPointF oldOffset = firstCleanNode.textNode()->matrix().map(QPointF(0,0));
            QPointF currentOffset = d->document->documentLayout()->blockBoundingRect(
                        d->document->findBlock(firstCleanNode.startPos())).topLeft();
            QPointF delta = currentOffset - oldOffset;
            while (nodeIterator != d->textNodeMap.end()) {
                QMatrix4x4 transformMatrix = nodeIterator->textNode()->matrix();
                transformMatrix.translate(delta.x(), delta.y());
                nodeIterator->textNode()->setMatrix(transformMatrix);
                ++nodeIterator;
            }
 
        }
 
        // Since we iterate over blocks from different text frames that are potentially not sorted
        // we need to ensure that our list of nodes is sorted again:
        std::sort(d->textNodeMap.begin(), d->textNodeMap.end());
    }
 
    if (d->cursorComponent == nullptr) {
        QSGInternalRectangleNode* cursor = nullptr;
        if (!isReadOnly() && d->cursorVisible && d->control->cursorOn() && d->control->cursorVisible())
            cursor = d->sceneGraphContext()->createInternalRectangleNode(d->control->cursorRect(), d->color);
        rootNode->resetCursorNode(cursor);
    }
 
    invalidateFontCaches();
 
    return rootNode;
}
 
void QQuickTextEdit::updatePolish()
{
    invalidateFontCaches();
}
 
bool QQuickTextEdit::canPaste() const
{
    Q_D(const QQuickTextEdit);
    if (!d->canPasteValid) {
        const_cast<QQuickTextEditPrivate *>(d)->canPaste = d->control->canPaste();
        const_cast<QQuickTextEditPrivate *>(d)->canPasteValid = true;
    }
    return d->canPaste;
}
 
bool QQuickTextEdit::canUndo() const
{
    Q_D(const QQuickTextEdit);
    return d->document->isUndoAvailable();
}
 
bool QQuickTextEdit::canRedo() const
{
    Q_D(const QQuickTextEdit);
    return d->document->isRedoAvailable();
}
 
bool QQuickTextEdit::isInputMethodComposing() const
{
#if !QT_CONFIG(im)
    return false;
#else
    Q_D(const QQuickTextEdit);
    return d->control->hasImState();
#endif // im
}
 
QQuickTextEditPrivate::ExtraData::ExtraData()
    : padding(0)
    , topPadding(0)
    , leftPadding(0)
    , rightPadding(0)
    , bottomPadding(0)
    , explicitTopPadding(false)
    , explicitLeftPadding(false)
    , explicitRightPadding(false)
    , explicitBottomPadding(false)
    , implicitResize(true)
{
}
 
void QQuickTextEditPrivate::init()
{
    Q_Q(QQuickTextEdit);
 
#if QT_CONFIG(clipboard)
    if (QGuiApplication::clipboard()->supportsSelection())
        q->setAcceptedMouseButtons(Qt::LeftButton | Qt::MiddleButton);
    else
#endif
        q->setAcceptedMouseButtons(Qt::LeftButton);
 
#if QT_CONFIG(im)
    q->setFlag(QQuickItem::ItemAcceptsInputMethod);
#endif
    q->setFlag(QQuickItem::ItemHasContents);
 
    q->setAcceptHoverEvents(true);
 
    document = new QQuickTextDocumentWithImageResources(q);
 
    control = new QQuickTextControl(document, q);
    control->setTextInteractionFlags(Qt::LinksAccessibleByMouse | Qt::TextSelectableByMouse | Qt::TextSelectableByKeyboard | Qt::TextEditable);
    control->setAcceptRichText(false);
    control->setCursorIsFocusIndicator(true);
    q->setKeepMouseGrab(true);
 
    qmlobject_connect(control, QQuickTextControl, SIGNAL(updateCursorRequest()), q, QQuickTextEdit, SLOT(updateCursor()));
    qmlobject_connect(control, QQuickTextControl, SIGNAL(selectionChanged()), q, QQuickTextEdit, SIGNAL(selectedTextChanged()));
    qmlobject_connect(control, QQuickTextControl, SIGNAL(selectionChanged()), q, QQuickTextEdit, SLOT(updateSelection()));
    qmlobject_connect(control, QQuickTextControl, SIGNAL(cursorPositionChanged()), q, QQuickTextEdit, SLOT(updateSelection()));
    qmlobject_connect(control, QQuickTextControl, SIGNAL(cursorPositionChanged()), q, QQuickTextEdit, SIGNAL(cursorPositionChanged()));
    qmlobject_connect(control, QQuickTextControl, SIGNAL(cursorRectangleChanged()), q, QQuickTextEdit, SLOT(moveCursorDelegate()));
    qmlobject_connect(control, QQuickTextControl, SIGNAL(linkActivated(QString)), q, QQuickTextEdit, SIGNAL(linkActivated(QString)));
    qmlobject_connect(control, QQuickTextControl, SIGNAL(overwriteModeChanged(bool)), q, QQuickTextEdit, SIGNAL(overwriteModeChanged(bool)));
    qmlobject_connect(control, QQuickTextControl, SIGNAL(textChanged()), q, QQuickTextEdit, SLOT(q_textChanged()));
    qmlobject_connect(control, QQuickTextControl, SIGNAL(preeditTextChanged()), q, QQuickTextEdit, SIGNAL(preeditTextChanged()));
#if QT_CONFIG(clipboard)
    qmlobject_connect(QGuiApplication::clipboard(), QClipboard, SIGNAL(dataChanged()), q, QQuickTextEdit, SLOT(q_canPasteChanged()));
#endif
    qmlobject_connect(document, QQuickTextDocumentWithImageResources, SIGNAL(undoAvailable(bool)), q, QQuickTextEdit, SIGNAL(canUndoChanged()));
    qmlobject_connect(document, QQuickTextDocumentWithImageResources, SIGNAL(redoAvailable(bool)), q, QQuickTextEdit, SIGNAL(canRedoChanged()));
    qmlobject_connect(document, QQuickTextDocumentWithImageResources, SIGNAL(imagesLoaded()), q, QQuickTextEdit, SLOT(updateSize()));
    QObject::connect(document, &QQuickTextDocumentWithImageResources::contentsChange, q, &QQuickTextEdit::q_contentsChange);
    QObject::connect(document->documentLayout(), &QAbstractTextDocumentLayout::updateBlock, q, &QQuickTextEdit::invalidateBlock);
    QObject::connect(control, &QQuickTextControl::linkHovered, q, &QQuickTextEdit::q_linkHovered);
    QObject::connect(control, &QQuickTextControl::markerHovered, q, &QQuickTextEdit::q_markerHovered);
 
    document->setDefaultFont(font);
    document->setDocumentMargin(textMargin);
    document->setUndoRedoEnabled(false); // flush undo buffer.
    document->setUndoRedoEnabled(true);
    updateDefaultTextOption();
    q->updateSize();
#if QT_CONFIG(cursor)
    updateMouseCursorShape();
#endif
}
 
void QQuickTextEditPrivate::resetInputMethod()
{
    Q_Q(QQuickTextEdit);
    if (!q->isReadOnly() && q->hasActiveFocus() && qGuiApp)
        QGuiApplication::inputMethod()->reset();
}
 
void QQuickTextEdit::q_textChanged()
{
    Q_D(QQuickTextEdit);
    d->textCached = false;
    for (QTextBlock it = d->document->begin(); it != d->document->end(); it = it.next()) {
        d->contentDirection = d->textDirection(it.text());
        if (d->contentDirection != Qt::LayoutDirectionAuto)
            break;
    }
    d->determineHorizontalAlignment();
    d->updateDefaultTextOption();
    updateSize();
 
    markDirtyNodesForRange(0, d->document->characterCount(), 0);
    if (isComponentComplete()) {
        polish();
        d->updateType = QQuickTextEditPrivate::UpdatePaintNode;
        update();
    }
 
    emit textChanged();
}
 
void QQuickTextEdit::markDirtyNodesForRange(int start, int end, int charDelta)
{
    Q_D(QQuickTextEdit);
    if (start == end)
        return;
 
    TextNode dummyNode(start);
 
    const TextNodeIterator textNodeMapBegin = d->textNodeMap.begin();
    const TextNodeIterator textNodeMapEnd = d->textNodeMap.end();
 
    TextNodeIterator it = std::lower_bound(textNodeMapBegin, textNodeMapEnd, dummyNode);
    // qLowerBound gives us the first node past the start of the affected portion, rewind to the first node
    // that starts at the last position before the edit position. (there might be several because of images)
    if (it != textNodeMapBegin) {
        --it;
        TextNode otherDummy(it->startPos());
        it = std::lower_bound(textNodeMapBegin, textNodeMapEnd, otherDummy);
    }
 
    // mark the affected nodes as dirty
    while (it != textNodeMapEnd) {
        if (it->startPos() <= end)
            it->setDirty();
        else if (charDelta)
            it->moveStartPos(charDelta);
        else
            return;
        ++it;
    }
}
 
void QQuickTextEdit::q_contentsChange(int pos, int charsRemoved, int charsAdded)
{
    Q_D(QQuickTextEdit);
 
    const int editRange = pos + qMax(charsAdded, charsRemoved);
    const int delta = charsAdded - charsRemoved;
 
    markDirtyNodesForRange(pos, editRange, delta);
 
    if (isComponentComplete()) {
        polish();
        d->updateType = QQuickTextEditPrivate::UpdatePaintNode;
        update();
    }
}
 
void QQuickTextEdit::moveCursorDelegate()
{
    Q_D(QQuickTextEdit);
#if QT_CONFIG(im)
    updateInputMethod();
#endif
    emit cursorRectangleChanged();
    if (!d->cursorItem)
        return;
    QRectF cursorRect = cursorRectangle();
    d->cursorItem->setX(cursorRect.x());
    d->cursorItem->setY(cursorRect.y());
    d->cursorItem->setHeight(cursorRect.height());
}
 
void QQuickTextEdit::updateSelection()
{
    Q_D(QQuickTextEdit);
 
    // No need for node updates when we go from an empty selection to another empty selection
    if (d->control->textCursor().hasSelection() || d->hadSelection) {
        markDirtyNodesForRange(qMin(d->lastSelectionStart, d->control->textCursor().selectionStart()), qMax(d->control->textCursor().selectionEnd(), d->lastSelectionEnd), 0);
        if (isComponentComplete()) {
            polish();
            d->updateType = QQuickTextEditPrivate::UpdatePaintNode;
            update();
        }
    }
 
    d->hadSelection = d->control->textCursor().hasSelection();
 
    if (d->lastSelectionStart != d->control->textCursor().selectionStart()) {
        d->lastSelectionStart = d->control->textCursor().selectionStart();
        emit selectionStartChanged();
    }
    if (d->lastSelectionEnd != d->control->textCursor().selectionEnd()) {
        d->lastSelectionEnd = d->control->textCursor().selectionEnd();
        emit selectionEndChanged();
    }
}
 
QRectF QQuickTextEdit::boundingRect() const
{
    Q_D(const QQuickTextEdit);
    QRectF r(
            QQuickTextUtil::alignedX(d->contentSize.width(), width(), effectiveHAlign()),
            d->yoff,
            d->contentSize.width(),
            d->contentSize.height());
 
    int cursorWidth = 1;
    if (d->cursorItem)
        cursorWidth = 0;
    else if (!d->document->isEmpty())
        cursorWidth += 3;// ### Need a better way of accounting for space between char and cursor
 
    // Could include font max left/right bearings to either side of rectangle.
    r.setRight(r.right() + cursorWidth);
 
    return r;
}
 
QRectF QQuickTextEdit::clipRect() const
{
    Q_D(const QQuickTextEdit);
    QRectF r = QQuickImplicitSizeItem::clipRect();
    int cursorWidth = 1;
    if (d->cursorItem)
        cursorWidth = d->cursorItem->width();
    if (!d->document->isEmpty())
        cursorWidth += 3;// ### Need a better way of accounting for space between char and cursor
 
    // Could include font max left/right bearings to either side of rectangle.
 
    r.setRight(r.right() + cursorWidth);
    return r;
}
 
qreal QQuickTextEditPrivate::getImplicitWidth() const
{
    Q_Q(const QQuickTextEdit);
    if (!requireImplicitWidth) {
        // We don't calculate implicitWidth unless it is required.
        // We need to force a size update now to ensure implicitWidth is calculated
        const_cast<QQuickTextEditPrivate*>(this)->requireImplicitWidth = true;
        const_cast<QQuickTextEdit*>(q)->updateSize();
    }
    return implicitWidth;
}
 
//### we should perhaps be a bit smarter here -- depending on what has changed, we shouldn't
//    need to do all the calculations each time
void QQuickTextEdit::updateSize()
{
    Q_D(QQuickTextEdit);
    if (!isComponentComplete()) {
        d->dirty = true;
        return;
    }
 
    // ### assumes that if the width is set, the text will fill to edges
    // ### (unless wrap is false, then clipping will occur)
    if (widthValid()) {
        if (!d->requireImplicitWidth) {
            emit implicitWidthChanged();
            // if the implicitWidth is used, then updateSize() has already been called (recursively)
            if (d->requireImplicitWidth)
                return;
        }
        if (d->requireImplicitWidth) {
            d->document->setTextWidth(-1);
            const qreal naturalWidth = d->document->idealWidth();
            const bool wasInLayout = d->inLayout;
            d->inLayout = true;
            if (d->isImplicitResizeEnabled())
                setImplicitWidth(naturalWidth + leftPadding() + rightPadding());
            d->inLayout = wasInLayout;
            if (d->inLayout)    // probably the result of a binding loop, but by letting it
                return;         // get this far we'll get a warning to that effect.
        }
        const qreal newTextWidth = width() - leftPadding() - rightPadding();
        if (d->document->textWidth() != newTextWidth)
            d->document->setTextWidth(newTextWidth);
    } else if (d->wrapMode == NoWrap) {
        // normally, if explicit width is not set, we should call setTextWidth(-1) here,
        // as we don't need to fit the text to any fixed width. But because of some bug
        // in QTextDocument it also breaks RTL text alignment, so we use "idealWidth" instead.
        const qreal newTextWidth = d->document->idealWidth();
        if (d->document->textWidth() != newTextWidth)
            d->document->setTextWidth(newTextWidth);
    } else {
        d->document->setTextWidth(-1);
    }
 
    QFontMetricsF fm(d->font);
    const qreal newHeight = d->document->isEmpty() ? qCeil(fm.height()) : d->document->size().height();
    const qreal newWidth = d->document->idealWidth();
 
    if (d->isImplicitResizeEnabled()) {
        // ### Setting the implicitWidth triggers another updateSize(), and unless there are bindings nothing has changed.
        if (!widthValid())
            setImplicitSize(newWidth + leftPadding() + rightPadding(), newHeight + topPadding() + bottomPadding());
        else
            setImplicitHeight(newHeight + topPadding() + bottomPadding());
    }
 
    d->xoff = leftPadding() + qMax(qreal(0), QQuickTextUtil::alignedX(d->document->size().width(), width() - leftPadding() - rightPadding(), effectiveHAlign()));
    d->yoff = topPadding() + QQuickTextUtil::alignedY(d->document->size().height(), height() - topPadding() - bottomPadding(), d->vAlign);
    setBaselineOffset(fm.ascent() + d->yoff + d->textMargin);
 
    QSizeF size(newWidth, newHeight);
    if (d->contentSize != size) {
        d->contentSize = size;
        // Note: inResize is a bitfield so QScopedValueRollback can't be used here
        const bool wasInResize = d->inResize;
        d->inResize = true;
        if (!wasInResize)
            emit contentSizeChanged();
        d->inResize = wasInResize;
        updateTotalLines();
    }
}
 
void QQuickTextEdit::updateWholeDocument()
{
    Q_D(QQuickTextEdit);
    if (!d->textNodeMap.isEmpty()) {
        for (TextNode &node : d->textNodeMap)
            node.setDirty();
    }
 
    if (isComponentComplete()) {
        polish();
        d->updateType = QQuickTextEditPrivate::UpdatePaintNode;
        update();
    }
}
 
void QQuickTextEdit::invalidateBlock(const QTextBlock &block)
{
    Q_D(QQuickTextEdit);
    markDirtyNodesForRange(block.position(), block.position() + block.length(), 0);
 
    if (isComponentComplete()) {
        polish();
        d->updateType = QQuickTextEditPrivate::UpdatePaintNode;
        update();
    }
}
 
void QQuickTextEdit::updateCursor()
{
    Q_D(QQuickTextEdit);
    if (isComponentComplete() && isVisible()) {
        polish();
        d->updateType = QQuickTextEditPrivate::UpdatePaintNode;
        update();
    }
}
 
void QQuickTextEdit::q_linkHovered(const QString &link)
{
    Q_D(QQuickTextEdit);
    emit linkHovered(link);
#if QT_CONFIG(cursor)
    if (link.isEmpty()) {
        d->updateMouseCursorShape();
    } else if (cursor().shape() != Qt::PointingHandCursor) {
        setCursor(Qt::PointingHandCursor);
    }
#endif
}
 
void QQuickTextEdit::q_markerHovered(bool hovered)
{
    Q_D(QQuickTextEdit);
#if QT_CONFIG(cursor)
    if (!hovered) {
        d->updateMouseCursorShape();
    } else if (cursor().shape() != Qt::PointingHandCursor) {
        setCursor(Qt::PointingHandCursor);
    }
#endif
}
 
void QQuickTextEdit::q_updateAlignment()
{
    Q_D(QQuickTextEdit);
    if (d->determineHorizontalAlignment()) {
        d->updateDefaultTextOption();
        d->xoff = qMax(qreal(0), QQuickTextUtil::alignedX(d->document->size().width(), width(), effectiveHAlign()));
        moveCursorDelegate();
    }
}
 
void QQuickTextEdit::updateTotalLines()
{
    Q_D(QQuickTextEdit);
 
    int subLines = 0;
 
    for (QTextBlock it = d->document->begin(); it != d->document->end(); it = it.next()) {
        QTextLayout *layout = it.layout();
        if (!layout)
            continue;
        subLines += layout->lineCount()-1;
    }
 
    int newTotalLines = d->document->lineCount() + subLines;
    if (d->lineCount != newTotalLines) {
        d->lineCount = newTotalLines;
        emit lineCountChanged();
    }
}
 
void QQuickTextEditPrivate::updateDefaultTextOption()
{
    Q_Q(QQuickTextEdit);
    QTextOption opt = document->defaultTextOption();
    const Qt::Alignment oldAlignment = opt.alignment();
    Qt::LayoutDirection oldTextDirection = opt.textDirection();
 
    QQuickTextEdit::HAlignment horizontalAlignment = q->effectiveHAlign();
    if (contentDirection == Qt::RightToLeft) {
        if (horizontalAlignment == QQuickTextEdit::AlignLeft)
            horizontalAlignment = QQuickTextEdit::AlignRight;
        else if (horizontalAlignment == QQuickTextEdit::AlignRight)
            horizontalAlignment = QQuickTextEdit::AlignLeft;
    }
    if (!hAlignImplicit)
        opt.setAlignment((Qt::Alignment)(int)(horizontalAlignment | vAlign));
    else
        opt.setAlignment(Qt::Alignment(vAlign));
 
#if QT_CONFIG(im)
    if (contentDirection == Qt::LayoutDirectionAuto) {
        opt.setTextDirection(qGuiApp->inputMethod()->inputDirection());
    } else
#endif
    {
        opt.setTextDirection(contentDirection);
    }
 
    QTextOption::WrapMode oldWrapMode = opt.wrapMode();
    opt.setWrapMode(QTextOption::WrapMode(wrapMode));
 
    bool oldUseDesignMetrics = opt.useDesignMetrics();
    opt.setUseDesignMetrics(renderType != QQuickTextEdit::NativeRendering);
 
    if (oldWrapMode != opt.wrapMode() || oldAlignment != opt.alignment()
        || oldTextDirection != opt.textDirection()
        || oldUseDesignMetrics != opt.useDesignMetrics()) {
        document->setDefaultTextOption(opt);
    }
}
 
void QQuickTextEdit::focusInEvent(QFocusEvent *event)
{
    Q_D(QQuickTextEdit);
    d->handleFocusEvent(event);
    QQuickImplicitSizeItem::focusInEvent(event);
}
 
void QQuickTextEdit::focusOutEvent(QFocusEvent *event)
{
    Q_D(QQuickTextEdit);
    d->handleFocusEvent(event);
    QQuickImplicitSizeItem::focusOutEvent(event);
}
 
void QQuickTextEditPrivate::handleFocusEvent(QFocusEvent *event)
{
    Q_Q(QQuickTextEdit);
    bool focus = event->type() == QEvent::FocusIn;
    if (!q->isReadOnly())
        q->setCursorVisible(focus);
    control->processEvent(event, QPointF(-xoff, -yoff));
    if (focus) {
        q->q_updateAlignment();
#if QT_CONFIG(im)
        if (focusOnPress && !q->isReadOnly())
            qGuiApp->inputMethod()->show();
        q->connect(QGuiApplication::inputMethod(), SIGNAL(inputDirectionChanged(Qt::LayoutDirection)),
                q, SLOT(q_updateAlignment()));
#endif
    } else {
#if QT_CONFIG(im)
        q->disconnect(QGuiApplication::inputMethod(), SIGNAL(inputDirectionChanged(Qt::LayoutDirection)),
                   q, SLOT(q_updateAlignment()));
#endif
        if (event->reason() != Qt::ActiveWindowFocusReason
                && event->reason() != Qt::PopupFocusReason
                && control->textCursor().hasSelection()
                && !persistentSelection)
            q->deselect();
 
        emit q->editingFinished();
    }
}
 
void QQuickTextEditPrivate::addCurrentTextNodeToRoot(QQuickTextNodeEngine *engine, QSGTransformNode *root, QQuickTextNode *node, TextNodeIterator &it, int startPos)
{
    engine->addToSceneGraph(node, QQuickText::Normal, QColor());
    it = textNodeMap.insert(it, TextNode(startPos, node));
    ++it;
    root->appendChildNode(node);
}
 
QQuickTextNode *QQuickTextEditPrivate::createTextNode()
{
    Q_Q(QQuickTextEdit);
    QQuickTextNode* node = new QQuickTextNode(q);
    node->setUseNativeRenderer(renderType == QQuickTextEdit::NativeRendering);
    return node;
}
 
void QQuickTextEdit::q_canPasteChanged()
{
    Q_D(QQuickTextEdit);
    bool old = d->canPaste;
    d->canPaste = d->control->canPaste();
    bool changed = old!=d->canPaste || !d->canPasteValid;
    d->canPasteValid = true;
    if (changed)
        emit canPasteChanged();
}
 
QString QQuickTextEdit::getText(int start, int end) const
{
    Q_D(const QQuickTextEdit);
    start = qBound(0, start, d->document->characterCount() - 1);
    end = qBound(0, end, d->document->characterCount() - 1);
    QTextCursor cursor(d->document);
    cursor.setPosition(start, QTextCursor::MoveAnchor);
    cursor.setPosition(end, QTextCursor::KeepAnchor);
#if QT_CONFIG(texthtmlparser)
    return d->richText || d->markdownText
            ? cursor.selectedText()
            : cursor.selection().toPlainText();
#else
    return cursor.selection().toPlainText();
#endif
}
 
QString QQuickTextEdit::getFormattedText(int start, int end) const
{
    Q_D(const QQuickTextEdit);
 
    start = qBound(0, start, d->document->characterCount() - 1);
    end = qBound(0, end, d->document->characterCount() - 1);
 
    QTextCursor cursor(d->document);
    cursor.setPosition(start, QTextCursor::MoveAnchor);
    cursor.setPosition(end, QTextCursor::KeepAnchor);
 
    if (d->richText) {
#if QT_CONFIG(texthtmlparser)
        return cursor.selection().toHtml();
#else
        return cursor.selection().toPlainText();
#endif
    } else if (d->markdownText) {
#if QT_CONFIG(textmarkdownwriter)
        return cursor.selection().toMarkdown();
#else
        return cursor.selection().toPlainText();
#endif
    } else {
        return cursor.selection().toPlainText();
    }
}
 
void QQuickTextEdit::insert(int position, const QString &text)
{
    Q_D(QQuickTextEdit);
    if (position < 0 || position >= d->document->characterCount())
        return;
    QTextCursor cursor(d->document);
    cursor.setPosition(position);
    d->richText = d->richText || (d->format == AutoText && Qt::mightBeRichText(text));
    if (d->richText) {
#if QT_CONFIG(texthtmlparser)
        cursor.insertHtml(text);
#else
        cursor.insertText(text);
#endif
    } else if (d->markdownText) {
#if QT_CONFIG(textmarkdownreader)
        cursor.insertMarkdown(text);
#else
        cursor.insertText(text);
#endif
    } else {
        cursor.insertText(text);
    }
    d->control->updateCursorRectangle(false);
}
 
void QQuickTextEdit::remove(int start, int end)
{
    Q_D(QQuickTextEdit);
    start = qBound(0, start, d->document->characterCount() - 1);
    end = qBound(0, end, d->document->characterCount() - 1);
    QTextCursor cursor(d->document);
    cursor.setPosition(start, QTextCursor::MoveAnchor);
    cursor.setPosition(end, QTextCursor::KeepAnchor);
    cursor.removeSelectedText();
    d->control->updateCursorRectangle(false);
}
 
QQuickTextDocument *QQuickTextEdit::textDocument()
{
    Q_D(QQuickTextEdit);
    if (!d->quickDocument)
        d->quickDocument = new QQuickTextDocument(this);
    return d->quickDocument;
}
 
bool QQuickTextEditPrivate::isLinkHoveredConnected()
{
    Q_Q(QQuickTextEdit);
    IS_SIGNAL_CONNECTED(q, QQuickTextEdit, linkHovered, (const QString &));
}
 
#if QT_CONFIG(cursor)
void QQuickTextEditPrivate::updateMouseCursorShape()
{
    Q_Q(QQuickTextEdit);
    q->setCursor(q->isReadOnly() && !q->selectByMouse() ? Qt::ArrowCursor : Qt::IBeamCursor);
}
#endif
 
QString QQuickTextEdit::hoveredLink() const
{
    Q_D(const QQuickTextEdit);
    if (const_cast<QQuickTextEditPrivate *>(d)->isLinkHoveredConnected()) {
        return d->control->hoveredLink();
    } else {
#if QT_CONFIG(cursor)
        if (QQuickWindow *wnd = window()) {
            QPointF pos = QCursor::pos(wnd->screen()) - wnd->position() - mapToScene(QPointF(0, 0));
            return d->control->anchorAt(pos);
        }
#endif // cursor
    }
    return QString();
}
 
void QQuickTextEdit::hoverEnterEvent(QHoverEvent *event)
{
    Q_D(QQuickTextEdit);
    if (d->isLinkHoveredConnected())
        d->control->processEvent(event, QPointF(-d->xoff, -d->yoff));
    event->ignore();
}
 
void QQuickTextEdit::hoverMoveEvent(QHoverEvent *event)
{
    Q_D(QQuickTextEdit);
    if (d->isLinkHoveredConnected())
        d->control->processEvent(event, QPointF(-d->xoff, -d->yoff));
    event->ignore();
}
 
void QQuickTextEdit::hoverLeaveEvent(QHoverEvent *event)
{
    Q_D(QQuickTextEdit);
    if (d->isLinkHoveredConnected())
        d->control->processEvent(event, QPointF(-d->xoff, -d->yoff));
    event->ignore();
}
 
void QQuickTextEdit::append(const QString &text)
{
    Q_D(QQuickTextEdit);
    QTextCursor cursor(d->document);
    cursor.beginEditBlock();
    cursor.movePosition(QTextCursor::End);
 
    if (!d->document->isEmpty())
        cursor.insertBlock();
 
    if (d->format == RichText || (d->format == AutoText && Qt::mightBeRichText(text))) {
#if QT_CONFIG(texthtmlparser)
        cursor.insertHtml(text);
#else
        cursor.insertText(text);
#endif
    } else if (d->format == MarkdownText) {
#if QT_CONFIG(textmarkdownreader)
        cursor.insertMarkdown(text);
#else
        cursor.insertText(text);
#endif
    } else {
        cursor.insertText(text);
    }
 
    cursor.endEditBlock();
    d->control->updateCursorRectangle(false);
}
 
QString QQuickTextEdit::linkAt(qreal x, qreal y) const
{
    Q_D(const QQuickTextEdit);
    return d->control->anchorAt(QPointF(x + topPadding(), y + leftPadding()));
}
 
qreal QQuickTextEdit::padding() const
{
    Q_D(const QQuickTextEdit);
    return d->padding();
}
 
void QQuickTextEdit::setPadding(qreal padding)
{
    Q_D(QQuickTextEdit);
    if (qFuzzyCompare(d->padding(), padding))
        return;
 
    d->extra.value().padding = padding;
    updateSize();
    if (isComponentComplete()) {
        d->updateType = QQuickTextEditPrivate::UpdatePaintNode;
        update();
    }
    emit paddingChanged();
    if (!d->extra.isAllocated() || !d->extra->explicitTopPadding)
        emit topPaddingChanged();
    if (!d->extra.isAllocated() || !d->extra->explicitLeftPadding)
        emit leftPaddingChanged();
    if (!d->extra.isAllocated() || !d->extra->explicitRightPadding)
        emit rightPaddingChanged();
    if (!d->extra.isAllocated() || !d->extra->explicitBottomPadding)
        emit bottomPaddingChanged();
}
 
void QQuickTextEdit::resetPadding()
{
    setPadding(0);
}
 
qreal QQuickTextEdit::topPadding() const
{
    Q_D(const QQuickTextEdit);
    if (d->extra.isAllocated() && d->extra->explicitTopPadding)
        return d->extra->topPadding;
    return d->padding();
}
 
void QQuickTextEdit::setTopPadding(qreal padding)
{
    Q_D(QQuickTextEdit);
    d->setTopPadding(padding);
}
 
void QQuickTextEdit::resetTopPadding()
{
    Q_D(QQuickTextEdit);
    d->setTopPadding(0, true);
}
 
qreal QQuickTextEdit::leftPadding() const
{
    Q_D(const QQuickTextEdit);
    if (d->extra.isAllocated() && d->extra->explicitLeftPadding)
        return d->extra->leftPadding;
    return d->padding();
}
 
void QQuickTextEdit::setLeftPadding(qreal padding)
{
    Q_D(QQuickTextEdit);
    d->setLeftPadding(padding);
}
 
void QQuickTextEdit::resetLeftPadding()
{
    Q_D(QQuickTextEdit);
    d->setLeftPadding(0, true);
}
 
qreal QQuickTextEdit::rightPadding() const
{
    Q_D(const QQuickTextEdit);
    if (d->extra.isAllocated() && d->extra->explicitRightPadding)
        return d->extra->rightPadding;
    return d->padding();
}
 
void QQuickTextEdit::setRightPadding(qreal padding)
{
    Q_D(QQuickTextEdit);
    d->setRightPadding(padding);
}
 
void QQuickTextEdit::resetRightPadding()
{
    Q_D(QQuickTextEdit);
    d->setRightPadding(0, true);
}
 
qreal QQuickTextEdit::bottomPadding() const
{
    Q_D(const QQuickTextEdit);
    if (d->extra.isAllocated() && d->extra->explicitBottomPadding)
        return d->extra->bottomPadding;
    return d->padding();
}
 
void QQuickTextEdit::setBottomPadding(qreal padding)
{
    Q_D(QQuickTextEdit);
    d->setBottomPadding(padding);
}
 
void QQuickTextEdit::resetBottomPadding()
{
    Q_D(QQuickTextEdit);
    d->setBottomPadding(0, true);
}
 
int QQuickTextEdit::tabStopDistance() const
{
    Q_D(const QQuickTextEdit);
    return d->document->defaultTextOption().tabStopDistance();
}
 
void QQuickTextEdit::setTabStopDistance(qreal distance)
{
    Q_D(QQuickTextEdit);
    QTextOption textOptions = d->document->defaultTextOption();
    if (textOptions.tabStopDistance() == distance)
        return;
 
    textOptions.setTabStopDistance(distance);
    d->document->setDefaultTextOption(textOptions);
    emit tabStopDistanceChanged(distance);
}
 
void QQuickTextEdit::clear()
{
    Q_D(QQuickTextEdit);
    d->resetInputMethod();
    d->control->clear();
}
 
#ifndef QT_NO_DEBUG_STREAM
QDebug operator<<(QDebug debug, const QQuickTextEditPrivate::Node &n)
{
    QDebugStateSaver saver(debug);
    debug.space();
    debug << "Node(startPos:" << n.m_startPos << "dirty:" << n.m_dirty << n.m_node << ')';
    return debug;
}
#endif
 
#if QT_VERSION < QT_VERSION_CHECK(7, 0, 0)
void QQuickTextEdit::setOldSelectionDefault()
{
    Q_D(QQuickTextEdit);
    d->selectByMouse = false;
    setKeepMouseGrab(false);
    d->control->setTextInteractionFlags(d->control->textInteractionFlags() & ~Qt::TextSelectableByMouse);
    d->control->setTouchDragSelectionEnabled(true);
    qCDebug(lcTextEdit, "pre-6.4 behavior chosen: selectByMouse defaults false; if enabled, touchscreen acts like a mouse");
}
 
// TODO in 6.7.0: remove the note about versions prior to 6.4 in selectByMouse() documentation
QQuickPre64TextEdit::QQuickPre64TextEdit(QQuickItem *parent)
    : QQuickTextEdit(parent)
{
    setOldSelectionDefault();
}
#endif
 
QT_END_NAMESPACE
 
#include "moc_qquicktextedit_p.cpp"