qtextedit.cpp

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// Copyright (C) 2019 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 "qtextedit_p.h"
#if QT_CONFIG(lineedit)
#include "qlineedit.h"
#endif
#if QT_CONFIG(textbrowser)
#include "qtextbrowser.h"
#endif
 
#include <qfont.h>
#include <qpainter.h>
#include <qevent.h>
#include <qdebug.h>
#if QT_CONFIG(draganddrop)
#include <qdrag.h>
#endif
#include <qclipboard.h>
#if QT_CONFIG(menu)
#include <qmenu.h>
#endif
#include <qstyle.h>
#include <qtimer.h>
#if QT_CONFIG(accessibility)
#include <qaccessible.h>
#endif
#include "private/qtextdocumentlayout_p.h"
#include "qtextdocument.h"
#include "private/qtextdocument_p.h"
#include "qtextlist.h"
#include "private/qwidgettextcontrol_p.h"
 
#include <qtextformat.h>
#include <qdatetime.h>
#include <qapplication.h>
#include <private/qapplication_p.h>
#include <limits.h>
#include <qtexttable.h>
#include <qvariant.h>
 
QT_BEGIN_NAMESPACE
 
static inline bool shouldEnableInputMethod(QTextEdit *textedit)
{
#if defined (Q_OS_ANDROID)
    return !textedit->isReadOnly() || (textedit->textInteractionFlags() & Qt::TextSelectableByMouse);
#else
    return !textedit->isReadOnly();
#endif
}
 
class QTextEditControl : public QWidgetTextControl
{
public:
    inline QTextEditControl(QObject *parent) : QWidgetTextControl(parent) {}
 
    virtual QMimeData *createMimeDataFromSelection() const override {
        QTextEdit *ed = qobject_cast<QTextEdit *>(parent());
        if (!ed)
            return QWidgetTextControl::createMimeDataFromSelection();
        return ed->createMimeDataFromSelection();
    }
    virtual bool canInsertFromMimeData(const QMimeData *source) const override {
        QTextEdit *ed = qobject_cast<QTextEdit *>(parent());
        if (!ed)
            return QWidgetTextControl::canInsertFromMimeData(source);
        return ed->canInsertFromMimeData(source);
    }
    virtual void insertFromMimeData(const QMimeData *source) override {
        QTextEdit *ed = qobject_cast<QTextEdit *>(parent());
        if (!ed)
            QWidgetTextControl::insertFromMimeData(source);
        else
            ed->insertFromMimeData(source);
    }
    QVariant loadResource(int type, const QUrl &name) override {
        auto *ed = qobject_cast<QTextEdit *>(parent());
        if (!ed)
            return QWidgetTextControl::loadResource(type, name);
 
        QUrl resolvedName = ed->d_func()->resolveUrl(name);
        return ed->loadResource(type, resolvedName);
    }
};
 
QTextEditPrivate::QTextEditPrivate()
    : control(nullptr),
      autoFormatting(QTextEdit::AutoNone), tabChangesFocus(false),
      lineWrap(QTextEdit::WidgetWidth), lineWrapColumnOrWidth(0),
      wordWrap(QTextOption::WrapAtWordBoundaryOrAnywhere), clickCausedFocus(0)
{
    ignoreAutomaticScrollbarAdjustment = false;
    preferRichText = false;
    showCursorOnInitialShow = true;
    inDrag = false;
}
 
QTextEditPrivate::~QTextEditPrivate()
{
    for (const QMetaObject::Connection &connection : connections)
        QObject::disconnect(connection);
}
 
void QTextEditPrivate::createAutoBulletList()
{
    QTextCursor cursor = control->textCursor();
    cursor.beginEditBlock();
 
    QTextBlockFormat blockFmt = cursor.blockFormat();
 
    QTextListFormat listFmt;
    listFmt.setStyle(QTextListFormat::ListDisc);
    listFmt.setIndent(blockFmt.indent() + 1);
 
    blockFmt.setIndent(0);
    cursor.setBlockFormat(blockFmt);
 
    cursor.createList(listFmt);
 
    cursor.endEditBlock();
    control->setTextCursor(cursor);
}
 
void QTextEditPrivate::init(const QString &html)
{
    Q_Q(QTextEdit);
    control = new QTextEditControl(q);
    control->setPalette(q->palette());
 
    connections = {
        QObjectPrivate::connect(control, &QTextEditControl::documentSizeChanged,
                                this, &QTextEditPrivate::adjustScrollbars),
        QObjectPrivate::connect(control, &QTextEditControl::updateRequest,
                                this, &QTextEditPrivate::repaintContents),
        QObjectPrivate::connect(control, &QTextEditControl::visibilityRequest,
                                this, &QTextEditPrivate::ensureVisible),
        QObjectPrivate::connect(control, &QTextEditControl::blockMarkerHovered,
                                this, &QTextEditPrivate::hoveredBlockWithMarkerChanged),
        QObjectPrivate::connect(control, &QTextEditControl::cursorPositionChanged,
                                this, &QTextEditPrivate::cursorPositionChanged),
        QObject::connect(control, &QTextEditControl::microFocusChanged,
                         q, [q]() { q->updateMicroFocus(); }),
        QObject::connect(control, &QTextEditControl::currentCharFormatChanged,
                         q, &QTextEdit::currentCharFormatChanged),
        QObject::connect(control, &QTextEditControl::textChanged,
                         q, &QTextEdit::textChanged),
        QObject::connect(control, &QTextEditControl::undoAvailable,
                         q, &QTextEdit::undoAvailable),
        QObject::connect(control, &QTextEditControl::redoAvailable,
                         q, &QTextEdit::redoAvailable),
        QObject::connect(control, &QTextEditControl::copyAvailable,
                         q, &QTextEdit::copyAvailable),
        QObject::connect(control, &QTextEditControl::selectionChanged,
                         q, &QTextEdit::selectionChanged),
        QObject::connect(control, &QTextEditControl::textChanged,
                         q, [q]() { q->updateMicroFocus(); }),
    };
 
    QTextDocument *doc = control->document();
    // set a null page size initially to avoid any relayouting until the textedit
    // is shown. relayoutDocument() will take care of setting the page size to the
    // viewport dimensions later.
    doc->setPageSize(QSize(0, 0));
    doc->documentLayout()->setPaintDevice(viewport);
    doc->setDefaultFont(q->font());
    doc->setUndoRedoEnabled(false); // flush undo buffer.
    doc->setUndoRedoEnabled(true);
 
    if (!html.isEmpty())
        control->setHtml(html);
 
    hbar->setSingleStep(20);
    vbar->setSingleStep(20);
 
    viewport->setBackgroundRole(QPalette::Base);
    q->setMouseTracking(true);
    q->setAcceptDrops(true);
    q->setFocusPolicy(Qt::StrongFocus);
    q->setAttribute(Qt::WA_KeyCompression);
    q->setAttribute(Qt::WA_InputMethodEnabled);
    q->setInputMethodHints(Qt::ImhMultiLine);
#ifndef QT_NO_CURSOR
    viewport->setCursor(Qt::IBeamCursor);
#endif
}
 
void QTextEditPrivate::repaintContents(const QRectF &contentsRect)
{
    if (!contentsRect.isValid()) {
        viewport->update();
        return;
    }
    const int xOffset = horizontalOffset();
    const int yOffset = verticalOffset();
    const QRectF visibleRect(xOffset, yOffset, viewport->width(), viewport->height());
 
    QRect r = contentsRect.intersected(visibleRect).toAlignedRect();
    if (r.isEmpty())
        return;
 
    r.translate(-xOffset, -yOffset);
    viewport->update(r);
}
 
void QTextEditPrivate::cursorPositionChanged()
{
    Q_Q(QTextEdit);
    emit q->cursorPositionChanged();
#if QT_CONFIG(accessibility)
    QAccessibleTextCursorEvent event(q, q->textCursor().position());
    QAccessible::updateAccessibility(&event);
#endif
}
 
void QTextEditPrivate::hoveredBlockWithMarkerChanged(const QTextBlock &block)
{
#if QT_CONFIG(cursor)
    Q_Q(QTextEdit);
    Qt::CursorShape cursor = cursorToRestoreAfterHover;
    if (block.isValid() && !q->isReadOnly()) {
        QTextBlockFormat::MarkerType marker = block.blockFormat().marker();
        if (marker != QTextBlockFormat::MarkerType::NoMarker) {
            if (viewport->cursor().shape() != Qt::PointingHandCursor)
                cursorToRestoreAfterHover = viewport->cursor().shape();
            cursor = Qt::PointingHandCursor;
        }
    }
    viewport->setCursor(cursor);
#endif
}
 
void QTextEditPrivate::pageUpDown(QTextCursor::MoveOperation op, QTextCursor::MoveMode moveMode)
{
    QTextCursor cursor = control->textCursor();
    bool moved = false;
    qreal lastY = control->cursorRect(cursor).top();
    qreal distance = 0;
    // move using movePosition to keep the cursor's x
    do {
        qreal y = control->cursorRect(cursor).top();
        distance += qAbs(y - lastY);
        lastY = y;
        moved = cursor.movePosition(op, moveMode);
    } while (moved && distance < viewport->height());
 
    if (moved) {
        if (op == QTextCursor::Up) {
            cursor.movePosition(QTextCursor::Down, moveMode);
            vbar->triggerAction(QAbstractSlider::SliderPageStepSub);
        } else {
            cursor.movePosition(QTextCursor::Up, moveMode);
            vbar->triggerAction(QAbstractSlider::SliderPageStepAdd);
        }
    }
    control->setTextCursor(cursor, moveMode == QTextCursor::KeepAnchor);
}
 
#if QT_CONFIG(scrollbar)
static QSize documentSize(QWidgetTextControl *control)
{
    QTextDocument *doc = control->document();
    QAbstractTextDocumentLayout *layout = doc->documentLayout();
 
    QSize docSize;
 
    if (QTextDocumentLayout *tlayout = qobject_cast<QTextDocumentLayout *>(layout)) {
        docSize = tlayout->dynamicDocumentSize().toSize();
        int percentageDone = tlayout->layoutStatus();
        // extrapolate height
        if (percentageDone > 0)
            docSize.setHeight(docSize.height() * 100 / percentageDone);
    } else {
        docSize = layout->documentSize().toSize();
    }
 
    return docSize;
}
 
void QTextEditPrivate::adjustScrollbars()
{
    if (ignoreAutomaticScrollbarAdjustment)
        return;
    ignoreAutomaticScrollbarAdjustment = true; // avoid recursion, #106108
 
    QSize viewportSize = viewport->size();
    QSize docSize = documentSize(control);
 
    // due to the recursion guard we have to repeat this step a few times,
    // as adding/removing a scroll bar will cause the document or viewport
    // size to change
    // ideally we should loop until the viewport size and doc size stabilize,
    // but in corner cases they might fluctuate, so we need to limit the
    // number of iterations
    for (int i = 0; i < 4; ++i) {
        hbar->setRange(0, docSize.width() - viewportSize.width());
        hbar->setPageStep(viewportSize.width());
 
        vbar->setRange(0, docSize.height() - viewportSize.height());
        vbar->setPageStep(viewportSize.height());
 
        // if we are in left-to-right mode widening the document due to
        // lazy layouting does not require a repaint. If in right-to-left
        // the scroll bar has the value zero and it visually has the maximum
        // value (it is visually at the right), then widening the document
        // keeps it at value zero but visually adjusts it to the new maximum
        // on the right, hence we need an update.
        if (q_func()->isRightToLeft())
            viewport->update();
 
        _q_showOrHideScrollBars();
 
        const QSize oldViewportSize = viewportSize;
        const QSize oldDocSize = docSize;
 
        // make sure the document is layouted if the viewport width changes
        viewportSize = viewport->size();
        if (viewportSize.width() != oldViewportSize.width())
            relayoutDocument();
 
        docSize = documentSize(control);
        if (viewportSize == oldViewportSize && docSize == oldDocSize)
            break;
    }
    ignoreAutomaticScrollbarAdjustment = false;
}
#endif
 
// rect is in content coordinates
void QTextEditPrivate::ensureVisible(const QRectF &_rect)
{
    const QRect rect = _rect.toRect();
    if ((vbar->isVisible() && vbar->maximum() < rect.bottom())
        || (hbar->isVisible() && hbar->maximum() < rect.right()))
        adjustScrollbars();
    const int visibleWidth = viewport->width();
    const int visibleHeight = viewport->height();
    const bool rtl = q_func()->isRightToLeft();
 
    if (rect.x() < horizontalOffset()) {
        if (rtl)
            hbar->setValue(hbar->maximum() - rect.x());
        else
            hbar->setValue(rect.x());
    } else if (rect.x() + rect.width() > horizontalOffset() + visibleWidth) {
        if (rtl)
            hbar->setValue(hbar->maximum() - (rect.x() + rect.width() - visibleWidth));
        else
            hbar->setValue(rect.x() + rect.width() - visibleWidth);
    }
 
    if (rect.y() < verticalOffset())
        vbar->setValue(rect.y());
    else if (rect.y() + rect.height() > verticalOffset() + visibleHeight)
        vbar->setValue(rect.y() + rect.height() - visibleHeight);
}
 
QTextEdit::QTextEdit(QWidget *parent)
    : QAbstractScrollArea(*new QTextEditPrivate, parent)
{
    Q_D(QTextEdit);
    d->init();
}
 
QTextEdit::QTextEdit(QTextEditPrivate &dd, QWidget *parent)
    : QAbstractScrollArea(dd, parent)
{
    Q_D(QTextEdit);
    d->init();
}
 
QTextEdit::QTextEdit(const QString &text, QWidget *parent)
    : QAbstractScrollArea(*new QTextEditPrivate, parent)
{
    Q_D(QTextEdit);
    d->init(text);
}
 
 
 
QTextEdit::~QTextEdit()
{
}
 
qreal QTextEdit::fontPointSize() const
{
    Q_D(const QTextEdit);
    return d->control->textCursor().charFormat().fontPointSize();
}
 
QString QTextEdit::fontFamily() const
{
    Q_D(const QTextEdit);
    return d->control->textCursor().charFormat().fontFamilies().toStringList().value(0, QString());
}
 
int QTextEdit::fontWeight() const
{
    Q_D(const QTextEdit);
    return d->control->textCursor().charFormat().fontWeight();
}
 
bool QTextEdit::fontUnderline() const
{
    Q_D(const QTextEdit);
    return d->control->textCursor().charFormat().fontUnderline();
}
 
bool QTextEdit::fontItalic() const
{
    Q_D(const QTextEdit);
    return d->control->textCursor().charFormat().fontItalic();
}
 
QColor QTextEdit::textColor() const
{
    Q_D(const QTextEdit);
    return d->control->textCursor().charFormat().foreground().color();
}
 
QColor QTextEdit::textBackgroundColor() const
{
    Q_D(const QTextEdit);
    const QBrush &brush = d->control->textCursor().charFormat().background();
    return brush.style() == Qt::NoBrush ? Qt::transparent : brush.color();
}
 
QFont QTextEdit::currentFont() const
{
    Q_D(const QTextEdit);
    return d->control->textCursor().charFormat().font();
}
 
void QTextEdit::setAlignment(Qt::Alignment a)
{
    Q_D(QTextEdit);
    QTextBlockFormat fmt;
    fmt.setAlignment(a);
    QTextCursor cursor = d->control->textCursor();
    cursor.mergeBlockFormat(fmt);
    d->control->setTextCursor(cursor);
    d->relayoutDocument();
}
 
Qt::Alignment QTextEdit::alignment() const
{
    Q_D(const QTextEdit);
    return d->control->textCursor().blockFormat().alignment();
}
 
void QTextEdit::setDocument(QTextDocument *document)
{
    Q_D(QTextEdit);
    d->control->setDocument(document);
    d->updateDefaultTextOption();
    d->relayoutDocument();
}
 
QTextDocument *QTextEdit::document() const
{
    Q_D(const QTextEdit);
    return d->control->document();
}
 
QString QTextEdit::placeholderText() const
{
    Q_D(const QTextEdit);
    return d->placeholderText;
}
 
void QTextEdit::setPlaceholderText(const QString &placeholderText)
{
    Q_D(QTextEdit);
    if (d->placeholderText != placeholderText) {
        d->placeholderText = placeholderText;
        if (d->control->document()->isEmpty())
            d->viewport->update();
    }
}
 
void QTextEdit::setTextCursor(const QTextCursor &cursor)
{
    doSetTextCursor(cursor);
}
 
void QTextEdit::doSetTextCursor(const QTextCursor &cursor)
{
    Q_D(QTextEdit);
    d->control->setTextCursor(cursor);
}
 
QTextCursor QTextEdit::textCursor() const
{
    Q_D(const QTextEdit);
    return d->control->textCursor();
}
 
void QTextEdit::setFontFamily(const QString &fontFamily)
{
    QTextCharFormat fmt;
    fmt.setFontFamilies({fontFamily});
    mergeCurrentCharFormat(fmt);
}
 
void QTextEdit::setFontPointSize(qreal s)
{
    QTextCharFormat fmt;
    fmt.setFontPointSize(s);
    mergeCurrentCharFormat(fmt);
}
 
void QTextEdit::setFontWeight(int w)
{
    QTextCharFormat fmt;
    fmt.setFontWeight(w);
    mergeCurrentCharFormat(fmt);
}
 
void QTextEdit::setFontUnderline(bool underline)
{
    QTextCharFormat fmt;
    fmt.setFontUnderline(underline);
    mergeCurrentCharFormat(fmt);
}
 
void QTextEdit::setFontItalic(bool italic)
{
    QTextCharFormat fmt;
    fmt.setFontItalic(italic);
    mergeCurrentCharFormat(fmt);
}
 
void QTextEdit::setTextColor(const QColor &c)
{
    QTextCharFormat fmt;
    fmt.setForeground(QBrush(c));
    mergeCurrentCharFormat(fmt);
}
 
void QTextEdit::setTextBackgroundColor(const QColor &c)
{
    QTextCharFormat fmt;
    fmt.setBackground(QBrush(c));
    mergeCurrentCharFormat(fmt);
}
 
void QTextEdit::setCurrentFont(const QFont &f)
{
    QTextCharFormat fmt;
    fmt.setFont(f);
    mergeCurrentCharFormat(fmt);
}
 
void QTextEdit::undo()
{
    Q_D(QTextEdit);
    d->control->undo();
}
 
void QTextEdit::redo()
{
    Q_D(QTextEdit);
    d->control->redo();
}
 
#ifndef QT_NO_CLIPBOARD
void QTextEdit::cut()
{
    Q_D(QTextEdit);
    d->control->cut();
}
 
void QTextEdit::copy()
{
    Q_D(QTextEdit);
    d->control->copy();
}
 
void QTextEdit::paste()
{
    Q_D(QTextEdit);
    d->control->paste();
}
#endif
 
void QTextEdit::clear()
{
    Q_D(QTextEdit);
    // clears and sets empty content
    d->control->clear();
}
 
 
void QTextEdit::selectAll()
{
    Q_D(QTextEdit);
    d->control->selectAll();
}
 
bool QTextEdit::event(QEvent *e)
{
    Q_D(QTextEdit);
    switch (e->type()) {
    case QEvent::ShortcutOverride:
    case QEvent::ToolTip:
        d->sendControlEvent(e);
        break;
    case QEvent::WindowActivate:
    case QEvent::WindowDeactivate:
        d->control->setPalette(palette());
        break;
#ifndef QT_NO_CONTEXTMENU
    case QEvent::ContextMenu:
        if (static_cast<QContextMenuEvent *>(e)->reason() == QContextMenuEvent::Keyboard) {
            ensureCursorVisible();
            const QPoint cursorPos = cursorRect().center();
            QContextMenuEvent ce(QContextMenuEvent::Keyboard, cursorPos, d->viewport->mapToGlobal(cursorPos));
            ce.setAccepted(e->isAccepted());
            const bool result = QAbstractScrollArea::event(&ce);
            e->setAccepted(ce.isAccepted());
            return result;
        }
        break;
#endif // QT_NO_CONTEXTMENU
#ifdef QT_KEYPAD_NAVIGATION
    case QEvent::EnterEditFocus:
    case QEvent::LeaveEditFocus:
        if (QApplicationPrivate::keypadNavigationEnabled())
            d->sendControlEvent(e);
        break;
#endif
    default:
        break;
    }
    return QAbstractScrollArea::event(e);
}
 
void QTextEdit::timerEvent(QTimerEvent *e)
{
    Q_D(QTextEdit);
    if (e->timerId() == d->autoScrollTimer.timerId()) {
        QRect visible = d->viewport->rect();
        QPoint pos;
        if (d->inDrag) {
            pos = d->autoScrollDragPos;
            visible.adjust(qMin(visible.width()/3,20), qMin(visible.height()/3,20),
                           -qMin(visible.width()/3,20), -qMin(visible.height()/3,20));
        } else {
            const QPoint globalPos = QCursor::pos();
            pos = d->viewport->mapFromGlobal(globalPos);
            QMouseEvent ev(QEvent::MouseMove, pos, mapTo(topLevelWidget(), pos), globalPos, Qt::LeftButton, Qt::LeftButton, Qt::NoModifier);
            mouseMoveEvent(&ev);
        }
        int deltaY = qMax(pos.y() - visible.top(), visible.bottom() - pos.y()) - visible.height();
        int deltaX = qMax(pos.x() - visible.left(), visible.right() - pos.x()) - visible.width();
        int delta = qMax(deltaX, deltaY);
        if (delta >= 0) {
            if (delta < 7)
                delta = 7;
            int timeout = 4900 / (delta * delta);
            d->autoScrollTimer.start(timeout, this);
 
            if (deltaY > 0)
                d->vbar->triggerAction(pos.y() < visible.center().y() ?
                                       QAbstractSlider::SliderSingleStepSub
                                       : QAbstractSlider::SliderSingleStepAdd);
            if (deltaX > 0)
                d->hbar->triggerAction(pos.x() < visible.center().x() ?
                                       QAbstractSlider::SliderSingleStepSub
                                       : QAbstractSlider::SliderSingleStepAdd);
        }
    }
#ifdef QT_KEYPAD_NAVIGATION
    else if (e->timerId() == d->deleteAllTimer.timerId()) {
        d->deleteAllTimer.stop();
        clear();
    }
#endif
}
 
void QTextEdit::setPlainText(const QString &text)
{
    Q_D(QTextEdit);
    d->control->setPlainText(text);
    d->preferRichText = false;
}
 
QString QTextEdit::toPlainText() const
{
    Q_D(const QTextEdit);
    return d->control->toPlainText();
}
 
#ifndef QT_NO_TEXTHTMLPARSER
void QTextEdit::setHtml(const QString &text)
{
    Q_D(QTextEdit);
    d->control->setHtml(text);
    d->preferRichText = true;
}
 
QString QTextEdit::toHtml() const
{
    Q_D(const QTextEdit);
    return d->control->toHtml();
}
#endif
 
#if QT_CONFIG(textmarkdownreader) && QT_CONFIG(textmarkdownwriter)
#endif
 
#if QT_CONFIG(textmarkdownreader)
void QTextEdit::setMarkdown(const QString &markdown)
{
    Q_D(const QTextEdit);
    d->control->setMarkdown(markdown);
}
#endif
 
#if QT_CONFIG(textmarkdownwriter)
QString QTextEdit::toMarkdown(QTextDocument::MarkdownFeatures features) const
{
    Q_D(const QTextEdit);
    return d->control->toMarkdown(features);
}
#endif
 
void QTextEdit::keyPressEvent(QKeyEvent *e)
{
    Q_D(QTextEdit);
 
#ifdef QT_KEYPAD_NAVIGATION
    switch (e->key()) {
        case Qt::Key_Select:
            if (QApplicationPrivate::keypadNavigationEnabled()) {
                // code assumes linksaccessible + editable isn't meaningful
                if (d->control->textInteractionFlags() & Qt::TextEditable) {
                    setEditFocus(!hasEditFocus());
                } else {
                    if (!hasEditFocus())
                        setEditFocus(true);
                    else {
                        QTextCursor cursor = d->control->textCursor();
                        QTextCharFormat charFmt = cursor.charFormat();
                        if (!(d->control->textInteractionFlags() & Qt::LinksAccessibleByKeyboard)
                            || !cursor.hasSelection() || charFmt.anchorHref().isEmpty()) {
                            e->accept();
                            return;
                        }
                    }
                }
            }
            break;
        case Qt::Key_Back:
        case Qt::Key_No:
            if (!QApplicationPrivate::keypadNavigationEnabled()
                    || (QApplicationPrivate::keypadNavigationEnabled() && !hasEditFocus())) {
                e->ignore();
                return;
            }
            break;
        default:
            if (QApplicationPrivate::keypadNavigationEnabled()) {
                if (!hasEditFocus() && !(e->modifiers() & Qt::ControlModifier)) {
                    if (e->text()[0].isPrint())
                        setEditFocus(true);
                    else {
                        e->ignore();
                        return;
                    }
                }
            }
            break;
    }
#endif
#ifndef QT_NO_SHORTCUT
 
    Qt::TextInteractionFlags tif = d->control->textInteractionFlags();
 
    if (tif & Qt::TextSelectableByKeyboard){
        if (e == QKeySequence::SelectPreviousPage) {
            e->accept();
            d->pageUpDown(QTextCursor::Up, QTextCursor::KeepAnchor);
            return;
        } else if (e ==QKeySequence::SelectNextPage) {
            e->accept();
            d->pageUpDown(QTextCursor::Down, QTextCursor::KeepAnchor);
            return;
        }
    }
    if (tif & (Qt::TextSelectableByKeyboard | Qt::TextEditable)) {
        if (e == QKeySequence::MoveToPreviousPage) {
            e->accept();
            d->pageUpDown(QTextCursor::Up, QTextCursor::MoveAnchor);
            return;
        } else if (e == QKeySequence::MoveToNextPage) {
            e->accept();
            d->pageUpDown(QTextCursor::Down, QTextCursor::MoveAnchor);
            return;
        }
    }
 
    if (!(tif & Qt::TextEditable)) {
        switch (e->key()) {
            case Qt::Key_Space:
                e->accept();
                if (e->modifiers() & Qt::ShiftModifier)
                    d->vbar->triggerAction(QAbstractSlider::SliderPageStepSub);
                else
                    d->vbar->triggerAction(QAbstractSlider::SliderPageStepAdd);
                break;
            default:
                d->sendControlEvent(e);
                if (!e->isAccepted() && e->modifiers() == Qt::NoModifier) {
                    if (e->key() == Qt::Key_Home) {
                        d->vbar->triggerAction(QAbstractSlider::SliderToMinimum);
                        e->accept();
                    } else if (e->key() == Qt::Key_End) {
                        d->vbar->triggerAction(QAbstractSlider::SliderToMaximum);
                        e->accept();
                    }
                }
                if (!e->isAccepted()) {
                    QAbstractScrollArea::keyPressEvent(e);
                }
        }
        return;
    }
#endif // QT_NO_SHORTCUT
 
    {
        QTextCursor cursor = d->control->textCursor();
        const QString text = e->text();
        if (cursor.atBlockStart()
            && (d->autoFormatting & AutoBulletList)
            && (text.size() == 1)
            && (text.at(0) == u'-' || text.at(0) == u'*')
            && (!cursor.currentList())) {
 
            d->createAutoBulletList();
            e->accept();
            return;
        }
    }
 
    d->sendControlEvent(e);
#ifdef QT_KEYPAD_NAVIGATION
    if (!e->isAccepted()) {
        switch (e->key()) {
            case Qt::Key_Up:
            case Qt::Key_Down:
                if (QApplicationPrivate::keypadNavigationEnabled()) {
                    // Cursor position didn't change, so we want to leave
                    // these keys to change focus.
                    e->ignore();
                    return;
                }
                break;
            case Qt::Key_Back:
                if (!e->isAutoRepeat()) {
                    if (QApplicationPrivate::keypadNavigationEnabled()) {
                        if (document()->isEmpty() || !(d->control->textInteractionFlags() & Qt::TextEditable)) {
                            setEditFocus(false);
                            e->accept();
                        } else if (!d->deleteAllTimer.isActive()) {
                            e->accept();
                            d->deleteAllTimer.start(750, this);
                        }
                    } else {
                        e->ignore();
                        return;
                    }
                }
                break;
            default: break;
        }
    }
#endif
}
 
void QTextEdit::keyReleaseEvent(QKeyEvent *e)
{
    Q_D(QTextEdit);
    if (!isReadOnly())
        d->handleSoftwareInputPanel();
#ifdef QT_KEYPAD_NAVIGATION
    if (QApplicationPrivate::keypadNavigationEnabled()) {
        if (!e->isAutoRepeat() && e->key() == Qt::Key_Back
            && d->deleteAllTimer.isActive()) {
            d->deleteAllTimer.stop();
            QTextCursor cursor = d->control->textCursor();
            QTextBlockFormat blockFmt = cursor.blockFormat();
 
            QTextList *list = cursor.currentList();
            if (list && cursor.atBlockStart()) {
                list->remove(cursor.block());
            } else if (cursor.atBlockStart() && blockFmt.indent() > 0) {
                blockFmt.setIndent(blockFmt.indent() - 1);
                cursor.setBlockFormat(blockFmt);
            } else {
                cursor.deletePreviousChar();
            }
            setTextCursor(cursor);
            e->accept();
            return;
        }
    }
#endif
    e->ignore();
}
 
QVariant QTextEdit::loadResource(int type, const QUrl &name)
{
    Q_UNUSED(type);
    Q_UNUSED(name);
    return QVariant();
}
 
void QTextEdit::resizeEvent(QResizeEvent *e)
{
    Q_D(QTextEdit);
 
    if (d->lineWrap == NoWrap) {
        QTextDocument *doc = d->control->document();
        QVariant alignmentProperty = doc->documentLayout()->property("contentHasAlignment");
 
        if (!doc->pageSize().isNull()
            && alignmentProperty.userType() == QMetaType::Bool
            && !alignmentProperty.toBool()) {
 
            d->adjustScrollbars();
            return;
        }
    }
 
    if (d->lineWrap != FixedPixelWidth
        && e->oldSize().width() != e->size().width())
        d->relayoutDocument();
    else
        d->adjustScrollbars();
}
 
void QTextEditPrivate::relayoutDocument()
{
    QTextDocument *doc = control->document();
    QAbstractTextDocumentLayout *layout = doc->documentLayout();
 
    if (QTextDocumentLayout *tlayout = qobject_cast<QTextDocumentLayout *>(layout)) {
        if (lineWrap == QTextEdit::FixedColumnWidth)
            tlayout->setFixedColumnWidth(lineWrapColumnOrWidth);
        else
            tlayout->setFixedColumnWidth(-1);
    }
 
    QTextDocumentLayout *tlayout = qobject_cast<QTextDocumentLayout *>(layout);
    QSize lastUsedSize;
    if (tlayout)
        lastUsedSize = tlayout->dynamicDocumentSize().toSize();
    else
        lastUsedSize = layout->documentSize().toSize();
 
    // ignore calls to adjustScrollbars caused by an emission of the
    // usedSizeChanged() signal in the layout, as we're calling it
    // later on our own anyway (or deliberately not) .
    const bool oldIgnoreScrollbarAdjustment = ignoreAutomaticScrollbarAdjustment;
    ignoreAutomaticScrollbarAdjustment = true;
 
    int width = viewport->width();
    if (lineWrap == QTextEdit::FixedPixelWidth)
        width = lineWrapColumnOrWidth;
    else if (lineWrap == QTextEdit::NoWrap) {
        QVariant alignmentProperty = doc->documentLayout()->property("contentHasAlignment");
        if (alignmentProperty.userType() == QMetaType::Bool && !alignmentProperty.toBool()) {
 
            width = 0;
        }
    }
 
    doc->setPageSize(QSize(width, -1));
    if (tlayout)
        tlayout->ensureLayouted(verticalOffset() + viewport->height());
 
    ignoreAutomaticScrollbarAdjustment = oldIgnoreScrollbarAdjustment;
 
    QSize usedSize;
    if (tlayout)
        usedSize = tlayout->dynamicDocumentSize().toSize();
    else
        usedSize = layout->documentSize().toSize();
 
    // this is an obscure situation in the layout that can happen:
    // if a character at the end of a line is the tallest one and therefore
    // influencing the total height of the line and the line right below it
    // is always taller though, then it can happen that if due to line breaking
    // that tall character wraps into the lower line the document not only shrinks
    // horizontally (causing the character to wrap in the first place) but also
    // vertically, because the original line is now smaller and the one below kept
    // its size. So a layout with less width _can_ take up less vertical space, too.
    // If the wider case causes a vertical scroll bar to appear and the narrower one
    // (narrower because the vertical scroll bar takes up horizontal space)) to disappear
    // again then we have an endless loop, as adjustScrollbars sets new ranges on the
    // scroll bars, the QAbstractScrollArea will find out about it and try to show/hide
    // the scroll bars again. That's why we try to detect this case here and break out.
    //
    // (if you change this please also check the layoutingLoop() testcase in
    // QTextEdit's autotests)
    if (lastUsedSize.isValid()
        && !vbar->isHidden()
        && viewport->width() < lastUsedSize.width()
        && usedSize.height() < lastUsedSize.height()
        && usedSize.height() <= viewport->height())
        return;
 
    adjustScrollbars();
}
 
void QTextEditPrivate::paint(QPainter *p, QPaintEvent *e)
{
    const int xOffset = horizontalOffset();
    const int yOffset = verticalOffset();
 
    QRect r = e->rect();
    p->translate(-xOffset, -yOffset);
    r.translate(xOffset, yOffset);
 
    QTextDocument *doc = control->document();
    QTextDocumentLayout *layout = qobject_cast<QTextDocumentLayout *>(doc->documentLayout());
 
    // the layout might need to expand the root frame to
    // the viewport if NoWrap is set
    if (layout)
        layout->setViewport(viewport->rect());
 
    control->drawContents(p, r, q_func());
 
    if (layout)
        layout->setViewport(QRect());
 
    if (!placeholderText.isEmpty() && doc->isEmpty() && !control->isPreediting()) {
        const QColor col = control->palette().placeholderText().color();
        p->setPen(col);
        const int margin = int(doc->documentMargin());
        p->drawText(viewport->rect().adjusted(margin, margin, -margin, -margin), Qt::AlignTop | Qt::TextWordWrap, placeholderText);
    }
}
 
void QTextEdit::paintEvent(QPaintEvent *e)
{
    Q_D(QTextEdit);
    QPainter p(d->viewport);
    d->paint(&p, e);
}
 
void QTextEditPrivate::updateDefaultTextOption()
{
    QTextDocument *doc = control->document();
 
    QTextOption opt = doc->defaultTextOption();
    QTextOption::WrapMode oldWrapMode = opt.wrapMode();
 
    if (lineWrap == QTextEdit::NoWrap)
        opt.setWrapMode(QTextOption::NoWrap);
    else
        opt.setWrapMode(wordWrap);
 
    if (opt.wrapMode() != oldWrapMode)
        doc->setDefaultTextOption(opt);
}
 
void QTextEdit::mousePressEvent(QMouseEvent *e)
{
    Q_D(QTextEdit);
#ifdef QT_KEYPAD_NAVIGATION
    if (QApplicationPrivate::keypadNavigationEnabled() && !hasEditFocus())
        setEditFocus(true);
#endif
    d->sendControlEvent(e);
}
 
void QTextEdit::mouseMoveEvent(QMouseEvent *e)
{
    Q_D(QTextEdit);
    d->inDrag = false; // paranoia
    const QPoint pos = e->position().toPoint();
    d->sendControlEvent(e);
    if (!(e->buttons() & Qt::LeftButton))
        return;
    if (e->source() == Qt::MouseEventNotSynthesized) {
        const QRect visible = d->viewport->rect();
        if (visible.contains(pos))
            d->autoScrollTimer.stop();
        else if (!d->autoScrollTimer.isActive())
            d->autoScrollTimer.start(100, this);
    }
}
 
void QTextEdit::mouseReleaseEvent(QMouseEvent *e)
{
    Q_D(QTextEdit);
    d->sendControlEvent(e);
    if (e->source() == Qt::MouseEventNotSynthesized && d->autoScrollTimer.isActive()) {
        d->autoScrollTimer.stop();
        ensureCursorVisible();
    }
    if (!isReadOnly() && rect().contains(e->position().toPoint()))
        d->handleSoftwareInputPanel(e->button(), d->clickCausedFocus);
    d->clickCausedFocus = 0;
}
 
void QTextEdit::mouseDoubleClickEvent(QMouseEvent *e)
{
    Q_D(QTextEdit);
    d->sendControlEvent(e);
}
 
bool QTextEdit::focusNextPrevChild(bool next)
{
    Q_D(const QTextEdit);
    if (!d->tabChangesFocus && d->control->textInteractionFlags() & Qt::TextEditable)
        return false;
    return QAbstractScrollArea::focusNextPrevChild(next);
}
 
#ifndef QT_NO_CONTEXTMENU
void QTextEdit::contextMenuEvent(QContextMenuEvent *e)
{
    Q_D(QTextEdit);
    d->sendControlEvent(e);
}
#endif // QT_NO_CONTEXTMENU
 
#if QT_CONFIG(draganddrop)
void QTextEdit::dragEnterEvent(QDragEnterEvent *e)
{
    Q_D(QTextEdit);
    d->inDrag = true;
    d->sendControlEvent(e);
}
 
void QTextEdit::dragLeaveEvent(QDragLeaveEvent *e)
{
    Q_D(QTextEdit);
    d->inDrag = false;
    d->autoScrollTimer.stop();
    d->sendControlEvent(e);
}
 
void QTextEdit::dragMoveEvent(QDragMoveEvent *e)
{
    Q_D(QTextEdit);
    d->autoScrollDragPos = e->position().toPoint();
    if (!d->autoScrollTimer.isActive())
        d->autoScrollTimer.start(100, this);
    d->sendControlEvent(e);
}
 
void QTextEdit::dropEvent(QDropEvent *e)
{
    Q_D(QTextEdit);
    d->inDrag = false;
    d->autoScrollTimer.stop();
    d->sendControlEvent(e);
}
 
#endif // QT_CONFIG(draganddrop)
 
void QTextEdit::inputMethodEvent(QInputMethodEvent *e)
{
    Q_D(QTextEdit);
#ifdef QT_KEYPAD_NAVIGATION
    if (d->control->textInteractionFlags() & Qt::TextEditable
        && QApplicationPrivate::keypadNavigationEnabled()
        && !hasEditFocus())
        setEditFocus(true);
#endif
    d->sendControlEvent(e);
    const bool emptyEvent = e->preeditString().isEmpty() && e->commitString().isEmpty()
                         && e->attributes().isEmpty();
    if (emptyEvent)
        return;
    ensureCursorVisible();
}
 
void QTextEdit::scrollContentsBy(int dx, int dy)
{
    Q_D(QTextEdit);
    if (isRightToLeft())
        dx = -dx;
    d->viewport->scroll(dx, dy);
    QGuiApplication::inputMethod()->update(Qt::ImCursorRectangle | Qt::ImAnchorRectangle);
}
 
QVariant QTextEdit::inputMethodQuery(Qt::InputMethodQuery property) const
{
    return inputMethodQuery(property, QVariant());
}
 
QVariant QTextEdit::inputMethodQuery(Qt::InputMethodQuery query, QVariant argument) const
{
    Q_D(const QTextEdit);
    switch (query) {
    case Qt::ImEnabled:
        return isEnabled() && !isReadOnly();
    case Qt::ImHints:
    case Qt::ImInputItemClipRectangle:
        return QWidget::inputMethodQuery(query);
    case Qt::ImReadOnly:
        return isReadOnly();
    default:
        break;
    }
 
    const QPointF offset(-d->horizontalOffset(), -d->verticalOffset());
    switch (argument.userType()) {
    case QMetaType::QRectF:
        argument = argument.toRectF().translated(-offset);
        break;
    case QMetaType::QPointF:
        argument = argument.toPointF() - offset;
        break;
    case QMetaType::QRect:
        argument = argument.toRect().translated(-offset.toPoint());
        break;
    case QMetaType::QPoint:
        argument = argument.toPoint() - offset;
        break;
    default:
        break;
    }
 
    const QVariant v = d->control->inputMethodQuery(query, argument);
    switch (v.userType()) {
    case QMetaType::QRectF:
        return v.toRectF().translated(offset);
    case QMetaType::QPointF:
        return v.toPointF() + offset;
    case QMetaType::QRect:
        return v.toRect().translated(offset.toPoint());
    case QMetaType::QPoint:
        return v.toPoint() + offset.toPoint();
    default:
        break;
    }
    return v;
}
 
void QTextEdit::focusInEvent(QFocusEvent *e)
{
    Q_D(QTextEdit);
    if (e->reason() == Qt::MouseFocusReason) {
        d->clickCausedFocus = 1;
    }
    QAbstractScrollArea::focusInEvent(e);
    d->sendControlEvent(e);
}
 
void QTextEdit::focusOutEvent(QFocusEvent *e)
{
    Q_D(QTextEdit);
    QAbstractScrollArea::focusOutEvent(e);
    d->sendControlEvent(e);
}
 
void QTextEdit::showEvent(QShowEvent *)
{
    Q_D(QTextEdit);
    if (!d->anchorToScrollToWhenVisible.isEmpty()) {
        scrollToAnchor(d->anchorToScrollToWhenVisible);
        d->anchorToScrollToWhenVisible.clear();
        d->showCursorOnInitialShow = false;
    } else if (d->showCursorOnInitialShow) {
        d->showCursorOnInitialShow = false;
        ensureCursorVisible();
    }
}
 
void QTextEdit::changeEvent(QEvent *e)
{
    Q_D(QTextEdit);
    QAbstractScrollArea::changeEvent(e);
    if (e->type() == QEvent::ApplicationFontChange
        || e->type() == QEvent::FontChange) {
        d->control->document()->setDefaultFont(font());
    }  else if (e->type() == QEvent::ActivationChange) {
        if (!isActiveWindow())
            d->autoScrollTimer.stop();
    } else if (e->type() == QEvent::EnabledChange) {
        e->setAccepted(isEnabled());
        d->control->setPalette(palette());
        d->sendControlEvent(e);
    } else if (e->type() == QEvent::PaletteChange) {
        d->control->setPalette(palette());
    } else if (e->type() == QEvent::LayoutDirectionChange) {
        d->sendControlEvent(e);
    }
}
 
#if QT_CONFIG(wheelevent)
void QTextEdit::wheelEvent(QWheelEvent *e)
{
    Q_D(QTextEdit);
    if (!(d->control->textInteractionFlags() & Qt::TextEditable)) {
        if (e->modifiers() & Qt::ControlModifier) {
            float delta = e->angleDelta().y() / 120.f;
            zoomInF(delta);
            return;
        }
    }
    QAbstractScrollArea::wheelEvent(e);
    updateMicroFocus();
}
#endif
 
#ifndef QT_NO_CONTEXTMENU
QMenu *QTextEdit::createStandardContextMenu()
{
    Q_D(QTextEdit);
    return d->control->createStandardContextMenu(QPointF(), this);
}
 
QMenu *QTextEdit::createStandardContextMenu(const QPoint &position)
{
    Q_D(QTextEdit);
    return d->control->createStandardContextMenu(position, this);
}
#endif // QT_NO_CONTEXTMENU
 
QTextCursor QTextEdit::cursorForPosition(const QPoint &pos) const
{
    Q_D(const QTextEdit);
    return d->control->cursorForPosition(d->mapToContents(pos));
}
 
QRect QTextEdit::cursorRect(const QTextCursor &cursor) const
{
    Q_D(const QTextEdit);
    if (cursor.isNull())
        return QRect();
 
    QRect r = d->control->cursorRect(cursor).toRect();
    r.translate(-d->horizontalOffset(),-d->verticalOffset());
    return r;
}
 
QRect QTextEdit::cursorRect() const
{
    Q_D(const QTextEdit);
    QRect r = d->control->cursorRect().toRect();
    r.translate(-d->horizontalOffset(),-d->verticalOffset());
    return r;
}
 
 
QString QTextEdit::anchorAt(const QPoint& pos) const
{
    Q_D(const QTextEdit);
    return d->control->anchorAt(d->mapToContents(pos));
}
 
bool QTextEdit::overwriteMode() const
{
    Q_D(const QTextEdit);
    return d->control->overwriteMode();
}
 
void QTextEdit::setOverwriteMode(bool overwrite)
{
    Q_D(QTextEdit);
    d->control->setOverwriteMode(overwrite);
}
 
qreal QTextEdit::tabStopDistance() const
{
    Q_D(const QTextEdit);
    return d->control->document()->defaultTextOption().tabStopDistance();
}
 
void QTextEdit::setTabStopDistance(qreal distance)
{
    Q_D(QTextEdit);
    QTextOption opt = d->control->document()->defaultTextOption();
    if (opt.tabStopDistance() == distance || distance < 0)
        return;
    opt.setTabStopDistance(distance);
    d->control->document()->setDefaultTextOption(opt);
}
 
int QTextEdit::cursorWidth() const
{
    Q_D(const QTextEdit);
    return d->control->cursorWidth();
}
 
void QTextEdit::setCursorWidth(int width)
{
    Q_D(QTextEdit);
    d->control->setCursorWidth(width);
}
 
bool QTextEdit::acceptRichText() const
{
    Q_D(const QTextEdit);
    return d->control->acceptRichText();
}
 
void QTextEdit::setAcceptRichText(bool accept)
{
    Q_D(QTextEdit);
    d->control->setAcceptRichText(accept);
}
 
void QTextEdit::setExtraSelections(const QList<ExtraSelection> &selections)
{
    Q_D(QTextEdit);
    d->control->setExtraSelections(selections);
}
 
QList<QTextEdit::ExtraSelection> QTextEdit::extraSelections() const
{
    Q_D(const QTextEdit);
    return d->control->extraSelections();
}
 
QMimeData *QTextEdit::createMimeDataFromSelection() const
{
    Q_D(const QTextEdit);
    return d->control->QWidgetTextControl::createMimeDataFromSelection();
}
 
bool QTextEdit::canInsertFromMimeData(const QMimeData *source) const
{
    Q_D(const QTextEdit);
    return d->control->QWidgetTextControl::canInsertFromMimeData(source);
}
 
void QTextEdit::insertFromMimeData(const QMimeData *source)
{
    Q_D(QTextEdit);
    d->control->QWidgetTextControl::insertFromMimeData(source);
}
 
bool QTextEdit::isReadOnly() const
{
    Q_D(const QTextEdit);
    return !d->control || !(d->control->textInteractionFlags() & Qt::TextEditable);
}
 
void QTextEdit::setReadOnly(bool ro)
{
    Q_D(QTextEdit);
    Qt::TextInteractionFlags flags = Qt::NoTextInteraction;
    if (ro) {
        flags = Qt::TextSelectableByMouse;
#if QT_CONFIG(textbrowser)
        if (qobject_cast<QTextBrowser *>(this))
            flags |= Qt::TextBrowserInteraction;
#endif
    } else {
        flags = Qt::TextEditorInteraction;
    }
    d->control->setTextInteractionFlags(flags);
    setAttribute(Qt::WA_InputMethodEnabled, shouldEnableInputMethod(this));
    QEvent event(QEvent::ReadOnlyChange);
    QCoreApplication::sendEvent(this, &event);
}
 
void QTextEdit::setTextInteractionFlags(Qt::TextInteractionFlags flags)
{
    Q_D(QTextEdit);
    d->control->setTextInteractionFlags(flags);
}
 
Qt::TextInteractionFlags QTextEdit::textInteractionFlags() const
{
    Q_D(const QTextEdit);
    return d->control->textInteractionFlags();
}
 
void QTextEdit::mergeCurrentCharFormat(const QTextCharFormat &modifier)
{
    Q_D(QTextEdit);
    d->control->mergeCurrentCharFormat(modifier);
}
 
void QTextEdit::setCurrentCharFormat(const QTextCharFormat &format)
{
    Q_D(QTextEdit);
    d->control->setCurrentCharFormat(format);
}
 
QTextCharFormat QTextEdit::currentCharFormat() const
{
    Q_D(const QTextEdit);
    return d->control->currentCharFormat();
}
 
QTextEdit::AutoFormatting QTextEdit::autoFormatting() const
{
    Q_D(const QTextEdit);
    return d->autoFormatting;
}
 
void QTextEdit::setAutoFormatting(AutoFormatting features)
{
    Q_D(QTextEdit);
    d->autoFormatting = features;
}
 
void QTextEdit::insertPlainText(const QString &text)
{
    Q_D(QTextEdit);
    d->control->insertPlainText(text);
}
 
#ifndef QT_NO_TEXTHTMLPARSER
void QTextEdit::insertHtml(const QString &text)
{
    Q_D(QTextEdit);
    d->control->insertHtml(text);
}
#endif // QT_NO_TEXTHTMLPARSER
 
void QTextEdit::scrollToAnchor(const QString &name)
{
    Q_D(QTextEdit);
    if (name.isEmpty())
        return;
 
    if (!isVisible()) {
        d->anchorToScrollToWhenVisible = name;
        return;
    }
 
    QPointF p = d->control->anchorPosition(name);
    const int newPosition = qRound(p.y());
    if ( d->vbar->maximum() < newPosition )
        d->adjustScrollbars();
    d->vbar->setValue(newPosition);
}
 
void QTextEdit::zoomIn(int range)
{
    zoomInF(range);
}
 
void QTextEdit::zoomOut(int range)
{
    zoomInF(-range);
}
 
void QTextEdit::zoomInF(float range)
{
    if (range == 0.f)
        return;
    QFont f = font();
    const float newSize = f.pointSizeF() + range;
    if (newSize <= 0)
        return;
    f.setPointSizeF(newSize);
    setFont(f);
}
 
void QTextEdit::moveCursor(QTextCursor::MoveOperation operation, QTextCursor::MoveMode mode)
{
    Q_D(QTextEdit);
    d->control->moveCursor(operation, mode);
}
 
bool QTextEdit::canPaste() const
{
    Q_D(const QTextEdit);
    return d->control->canPaste();
}
 
#ifndef QT_NO_PRINTER
void QTextEdit::print(QPagedPaintDevice *printer) const
{
    Q_D(const QTextEdit);
    d->control->print(printer);
}
#endif
 
bool QTextEdit::tabChangesFocus() const
{
    Q_D(const QTextEdit);
    return d->tabChangesFocus;
}
 
void QTextEdit::setTabChangesFocus(bool b)
{
    Q_D(QTextEdit);
    d->tabChangesFocus = b;
}
 
QTextEdit::LineWrapMode QTextEdit::lineWrapMode() const
{
    Q_D(const QTextEdit);
    return d->lineWrap;
}
 
void QTextEdit::setLineWrapMode(LineWrapMode wrap)
{
    Q_D(QTextEdit);
    if (d->lineWrap == wrap)
        return;
    d->lineWrap = wrap;
    d->updateDefaultTextOption();
    d->relayoutDocument();
}
 
int QTextEdit::lineWrapColumnOrWidth() const
{
    Q_D(const QTextEdit);
    return d->lineWrapColumnOrWidth;
}
 
void QTextEdit::setLineWrapColumnOrWidth(int w)
{
    Q_D(QTextEdit);
    d->lineWrapColumnOrWidth = w;
    d->relayoutDocument();
}
 
QTextOption::WrapMode QTextEdit::wordWrapMode() const
{
    Q_D(const QTextEdit);
    return d->wordWrap;
}
 
void QTextEdit::setWordWrapMode(QTextOption::WrapMode mode)
{
    Q_D(QTextEdit);
    if (mode == d->wordWrap)
        return;
    d->wordWrap = mode;
    d->updateDefaultTextOption();
}
 
bool QTextEdit::find(const QString &exp, QTextDocument::FindFlags options)
{
    Q_D(QTextEdit);
    return d->control->find(exp, options);
}
 
#if QT_CONFIG(regularexpression)
bool QTextEdit::find(const QRegularExpression &exp, QTextDocument::FindFlags options)
{
    Q_D(QTextEdit);
    return d->control->find(exp, options);
}
#endif
 
void QTextEdit::setText(const QString &text)
{
    Qt::TextFormat format = Qt::mightBeRichText(text) ? Qt::RichText : Qt::PlainText;
#ifndef QT_NO_TEXTHTMLPARSER
    if (format == Qt::RichText)
        setHtml(text);
    else
#else
    Q_UNUSED(format);
#endif
        setPlainText(text);
}
 
 
void QTextEdit::append(const QString &text)
{
    Q_D(QTextEdit);
    const bool atBottom = isReadOnly() ?  d->verticalOffset() >= d->vbar->maximum() :
            d->control->textCursor().atEnd();
    d->control->append(text);
    if (atBottom)
        d->vbar->setValue(d->vbar->maximum());
}
 
void QTextEdit::ensureCursorVisible()
{
    Q_D(QTextEdit);
    d->control->ensureCursorVisible();
}
 
QT_END_NAMESPACE
 
#include "moc_qtextedit.cpp"