Esempio n. 1
0
void QTextDocumentPrivate::setBlockFormat(const QTextBlock &from, const QTextBlock &to,
				     const QTextBlockFormat &newFormat, FormatChangeMode mode)
{
    beginEditBlock();

    Q_ASSERT(mode != SetFormatAndPreserveObjectIndices); // only implemented for setCharFormat

    Q_ASSERT(newFormat.isValid());

    int newFormatIdx = -1;
    if (mode == SetFormat)
        newFormatIdx = formats.indexForFormat(newFormat);
    QTextBlockGroup *group = qobject_cast<QTextBlockGroup *>(objectForFormat(newFormat));

    QTextBlock it = from;
    QTextBlock end = to;
    if (end.isValid())
	end = end.next();

    for (; it != end; it = it.next()) {
        int oldFormat = block(it)->format;
        QTextBlockFormat format = formats.blockFormat(oldFormat);
        QTextBlockGroup *oldGroup = qobject_cast<QTextBlockGroup *>(objectForFormat(format));
        if (mode == MergeFormat) {
            format.merge(newFormat);
            newFormatIdx = formats.indexForFormat(format);
            group = qobject_cast<QTextBlockGroup *>(objectForFormat(format));
        }
        block(it)->format = newFormatIdx;

        block(it)->invalidate();

        QTextUndoCommand c = { QTextUndoCommand::BlockFormatChanged, true, QTextUndoCommand::MoveCursor, oldFormat,
                               0, it.position(), { 1 }, 0 };
        appendUndoItem(c);

        if (group != oldGroup) {
            if (oldGroup)
                oldGroup->blockRemoved(it);
            if (group)
                group->blockInserted(it);
        } else if (group) {
	    group->blockFormatChanged(it);
	}
    }

    documentChange(from.position(), to.position() + to.length() - from.position());

    endEditBlock();
}