qtextcontrol.cpp

奇趣公司比较新的qt/emd版本

        setClipboardSelection();
#endif
    }
    repaintOldAndNewSelection(oldSelection);

    cursorIsFocusIndicator = false;
    selectedWordOnDoubleClick = cursor;

    trippleClickPoint = pos;
    trippleClickTimer.start(qApp->doubleClickInterval(), q);
}

void QTextControlPrivate::contextMenuEvent(const QPoint &screenPos, const QPointF &docPos, QWidget *contextWidget)
{
#ifdef QT_NO_CONTEXTMENU
    Q_UNUSED(screenPos);
    Q_UNUSED(docPos);
    Q_UNUSED(contextWidget);
#else
    Q_Q(QTextControl);
    if (!hasFocus)
        return;
    QMenu *menu = q->createStandardContextMenu(docPos, contextWidget);
    if (!menu)
        return;
    menu->exec(screenPos);
    delete menu;
#endif
}

bool QTextControlPrivate::dragEnterEvent(QEvent *e, const QMimeData *mimeData)
{
    Q_Q(QTextControl);
    if (!(interactionFlags & Qt::TextEditable) || !q->canInsertFromMimeData(mimeData)) {
        e->ignore();
        return false;
    }

    dndFeedbackCursor = QTextCursor();

    return true; // accept proposed action
}

void QTextControlPrivate::dragLeaveEvent()
{
    Q_Q(QTextControl);

    const QRectF crect = q->cursorRect(dndFeedbackCursor);
    dndFeedbackCursor = QTextCursor();

    if (crect.isValid())
        emit q->updateRequest(crect);
}

bool QTextControlPrivate::dragMoveEvent(QEvent *e, const QMimeData *mimeData, const QPointF &pos)
{
    Q_Q(QTextControl);
    if (!(interactionFlags & Qt::TextEditable) || !q->canInsertFromMimeData(mimeData)) {
        e->ignore();
        return false;
    }

    const int cursorPos = doc->documentLayout()->hitTest(pos, Qt::FuzzyHit);
    if (cursorPos != -1) {
        QRectF crect = q->cursorRect(dndFeedbackCursor);
        if (crect.isValid())
            emit q->updateRequest(crect);

        dndFeedbackCursor = cursor;
        dndFeedbackCursor.setPosition(cursorPos);

        crect = q->cursorRect(dndFeedbackCursor);
        emit q->updateRequest(crect);
    }

    return true; // accept proposed action
}

bool QTextControlPrivate::dropEvent(const QMimeData *mimeData, const QPointF &pos, Qt::DropAction dropAction, QWidget *source)
{
    Q_Q(QTextControl);
    dndFeedbackCursor = QTextCursor();

    if (!(interactionFlags & Qt::TextEditable) || !q->canInsertFromMimeData(mimeData))
        return false;

    repaintSelection();

    QTextCursor insertionCursor = q->cursorForPosition(pos);
    insertionCursor.beginEditBlock();

    if (dropAction == Qt::MoveAction && source == contextWidget)
        cursor.removeSelectedText();

    cursor = insertionCursor;
    q->insertFromMimeData(mimeData);
    insertionCursor.endEditBlock();
    q->ensureCursorVisible();
    return true; // accept proposed action
}

void QTextControlPrivate::inputMethodEvent(QInputMethodEvent *e)
{
    if (!(interactionFlags & Qt::TextEditable) || cursor.isNull()) {
        e->ignore();
        return;
    }
    cursor.beginEditBlock();

    cursor.removeSelectedText();

    // insert commit string
    if (!e->commitString().isEmpty() || e->replacementLength()) {
        QTextCursor c = cursor;
        c.setPosition(c.position() + e->replacementStart());
        c.setPosition(c.position() + e->replacementLength(), QTextCursor::KeepAnchor);
        c.insertText(e->commitString());
    }

    QTextBlock block = cursor.block();
    QTextLayout *layout = block.layout();
    layout->setPreeditArea(cursor.position() - block.position(), e->preeditString());
    QList<QTextLayout::FormatRange> overrides;
    preeditCursor = e->preeditString().length();
    hideCursor = false;
    for (int i = 0; i < e->attributes().size(); ++i) {
        const QInputMethodEvent::Attribute &a = e->attributes().at(i);
        if (a.type == QInputMethodEvent::Cursor) {
            preeditCursor = a.start;
            hideCursor = !a.length;
        } else if (a.type == QInputMethodEvent::TextFormat) {
            QTextCharFormat f = qvariant_cast<QTextFormat>(a.value).toCharFormat();
            if (f.isValid()) {
                QTextLayout::FormatRange o;
                o.start = a.start + cursor.position() - block.position();
                o.length = a.length;
                o.format = f;
                overrides.append(o);
            }
        }
    }
    layout->setAdditionalFormats(overrides);
    cursor.endEditBlock();
}

QVariant QTextControl::inputMethodQuery(Qt::InputMethodQuery property) const
{
    Q_D(const QTextControl);
    QTextBlock block = d->cursor.block();
    switch(property) {
    case Qt::ImMicroFocus:
        return cursorRect();
    case Qt::ImFont:
        return QVariant(d->cursor.charFormat().font());
    case Qt::ImCursorPosition:
        return QVariant(d->cursor.position() - block.position());
    case Qt::ImSurroundingText:
        return QVariant(block.text());
    case Qt::ImCurrentSelection:
        return QVariant(d->cursor.selectedText());
    default:
        return QVariant();
    }
}

void QTextControl::setFocus(bool focus, Qt::FocusReason reason)
{
    QFocusEvent ev(focus ? QEvent::FocusIn : QEvent::FocusOut,
                   reason);
    processEvent(&ev);
}

void QTextControlPrivate::focusEvent(QFocusEvent *e)
{
    Q_Q(QTextControl);
    emit q->updateRequest(q->selectionRect());
    if (e->gotFocus()) {
#ifdef QT_KEYPAD_NAVIGATION
        if (!QApplication::keypadNavigationEnabled() || (hasEditFocus && e->reason() == Qt::PopupFocusReason)) {
#endif
        cursorOn = (interactionFlags & Qt::TextSelectableByKeyboard);
        if (interactionFlags & Qt::TextEditable) {
            setBlinkingCursorEnabled(true);
        }
#ifdef QT_KEYPAD_NAVIGATION
        }
#endif
    } else {
        setBlinkingCursorEnabled(false);

        if (interactionFlags & Qt::LinksAccessibleByKeyboard
            && e->reason() != Qt::ActiveWindowFocusReason
            && e->reason() != Qt::PopupFocusReason
            && cursor.hasSelection()) {
            cursor.clearSelection();
        }
    }
    hasFocus = e->gotFocus();
}

QString QTextControlPrivate::anchorForCursor(const QTextCursor &anchorCursor) const
{
    if (anchorCursor.hasSelection()) {
        QTextCursor cursor = anchorCursor;
        if (cursor.selectionStart() != cursor.position())
            cursor.setPosition(cursor.selectionStart());
        cursor.movePosition(QTextCursor::NextCharacter);
        QTextCharFormat fmt = cursor.charFormat();
        if (fmt.isAnchor() && fmt.hasProperty(QTextFormat::AnchorHref))
            return fmt.stringProperty(QTextFormat::AnchorHref);
    }
    return QString();
}

#ifdef QT_KEYPAD_NAVIGATION
void QTextControlPrivate::editFocusEvent(QEvent *e)
{
    Q_Q(QTextControl);

    if (QApplication::keypadNavigationEnabled()) {
        if (e->type() == QEvent::EnterEditFocus && interactionFlags & Qt::TextEditable) {
            const QTextCursor oldSelection = cursor;
            const int oldCursorPos = cursor.position();
            const bool moved = cursor.movePosition(QTextCursor::End, QTextCursor::MoveAnchor);
            q->ensureCursorVisible();
            if (moved) {
                if (cursor.position() != oldCursorPos)
                    emit q->cursorPositionChanged();
                emit q->microFocusChanged();
            }
            selectionChanged();
            repaintOldAndNewSelection(oldSelection);

            setBlinkingCursorEnabled(true);
        } else
            setBlinkingCursorEnabled(false);
    }

    hasEditFocus = e->type() == QEvent::EnterEditFocus ? true : false;
}
#endif

#ifndef QT_NO_CONTEXTMENU
QMenu *QTextControl::createStandardContextMenu(const QPointF &pos, QWidget *parent)
{
    Q_D(QTextControl);

    const bool showTextSelectionActions = d->interactionFlags & (Qt::TextEditable | Qt::TextSelectableByKeyboard | Qt::TextSelectableByMouse);

    d->linkToCopy = QString();
    if (!pos.isNull())
        d->linkToCopy = anchorAt(pos);

    if (d->linkToCopy.isEmpty() && !showTextSelectionActions)
        return 0;

    QMenu *menu = new QMenu(parent);
    QAction *a;

    if (d->interactionFlags & Qt::TextEditable) {
        QString text = tr("&Undo");
        a = menu->addAction(tr("&Undo") + ACCEL_KEY(QKeySequence::Undo), this, SLOT(undo()));
        a->setEnabled(d->doc->isUndoAvailable());
        a = menu->addAction(tr("&Redo") + ACCEL_KEY(QKeySequence::Redo), this, SLOT(redo()));
        a->setEnabled(d->doc->isRedoAvailable());
        menu->addSeparator();

        a = menu->addAction(tr("Cu&t") + ACCEL_KEY(QKeySequence::Cut), this, SLOT(cut()));
        a->setEnabled(d->cursor.hasSelection());
    }

    if (showTextSelectionActions) {
        a = menu->addAction(tr("&Copy") + ACCEL_KEY(QKeySequence::Copy), this, SLOT(copy()));
        a->setEnabled(d->cursor.hasSelection());
    }

    if ((d->interactionFlags & Qt::LinksAccessibleByKeyboard)
            || (d->interactionFlags & Qt::LinksAccessibleByMouse)) {

        a = menu->addAction(tr("Copy &Link Location"), this, SLOT(_q_copyLink()));
        a->setEnabled(!d->linkToCopy.isEmpty());
    }

    if (d->interactionFlags & Qt::TextEditable) {
#if !defined(QT_NO_CLIPBOARD)
        a = menu->addAction(tr("&Paste") + ACCEL_KEY(QKeySequence::Paste), this, SLOT(paste()));
        a->setEnabled(canPaste());
#endif
        a = menu->addAction(tr("Delete"), this, SLOT(_q_deleteSelected()));
        a->setEnabled(d->cursor.hasSelection());
    }


    if (showTextSelectionActions) {
        menu->addSeparator();
        a = menu->addAction(tr("Select All") + ACCEL_KEY(QKeySequence::SelectAll), this, SLOT(selectAll()));
        a->setEnabled(!d->doc->isEmpty());
    }

    if (d->interactionFlags & Qt::TextEditable) {
        menu->addSeparator();
        QUnicodeControlCharacterMenu *ctrlCharacterMenu = new QUnicodeControlCharacterMenu(this, menu);
        menu->addMenu(ctrlCharacterMenu);
    }

    return menu;
}
#endif // QT_NO_CONTEXTMENU

QTextCursor QTextControl::cursorForPosition(const QPointF &pos) const
{
    Q_D(const QTextControl);
    int cursorPos = d->doc->documentLayout()->hitTest(pos, Qt::FuzzyHit);
    if (cursorPos == -1)
        cursorPos = 0;
    QTextCursor c(d->doc);
    c.setPosition(cursorPos);
    return c;
}

QRectF QTextControl::cursorRect(const QTextCursor &cursor) const
{
    Q_D(const QTextControl);
    if (cursor.isNull())
        return QRectF();

   return d->rectForPosition(cursor.position());
}

QRectF QTextControl::cursorRect() const
{
    Q_D(const QTextControl);
    return cursorRect(d->cursor);
}

QString QTextControl::anchorAt(const QPointF &pos) const
{
    Q_D(const QTextControl);
    return d->doc->documentLayout()->anchorAt(pos);
}

QString QTextControl::anchorAtCursor() const
{
    Q_D(const QTextControl);

    return d->anchorForCursor(d->cursor);
}

bool QTextControl::overwriteMode() const
{
    Q_D(const QTextControl);
    return d->overwriteMode;
}

void QTextControl::setOverwriteMode(bool overwrite)
{
    Q_D(QTextControl);
    d->overwriteMode = overwrite;
}

int QTextControl::cursorWidth() const
{
#ifndef QT_NO_PROPERTIES
    Q_D(const QTextControl);
    return d->doc->documentLayout()->property("cursorWidth").toInt();
#else
    return 1;
#endif
}

void QTextControl::setCursorWidth(int width)
{
    Q_D(QTextControl);
#ifdef QT_NO_PROPERTIES
    Q_UNUSED(width);
#else
    d->doc->documentLayout()->setProperty("cursorWidth", width);
#endif
    d->repaintCursor();
}

bool QTextControl::acceptRichText() const
{
    Q_D(const QTextControl);
    return d->acceptRichText;
}

void QTextControl::setAcceptRichText(bool accept)
{
    Q_D(QTextControl);
    d->acceptRichText = accept;
}

#ifndef QT_NO_TEXTEDIT

void QTextControl::setExtraSelections(const QList<QTextEdit::ExtraSelection> &selections)
{
    Q_D(QTextControl);
    if (selections.count() == d->extraSelections.count()) {
        bool needUpdate = false;
        for (int i = 0; i < selections.count(); ++i)
            if (selections.at(i).cursor.position() != d->extraSelections.at(i).cursor.position()
                || selections.at(i).cursor.anchor() != d->extraSelections.at(i).cursor.anchor()