C++ QTextFragment::charFormat方法代码示例

void TextDocument::replaceImageUrl(const QUrl &oldName, const QString &newName) {
	QList <QPair<int, int> > fragments;

	QTextBlock block = begin();

	while(block.isValid()) {
		QTextBlock::iterator iterator;
		for(iterator = block.begin(); !(iterator.atEnd()); ++iterator) {
			QTextFragment fragment = iterator.fragment();
			if(fragment.isValid() && fragment.charFormat().isImageFormat()) {
				QTextImageFormat format = fragment.charFormat().toImageFormat();
				if (QUrl::fromEncoded(format.name().toUtf8()) != oldName) {continue;}
				fragments.append(QPair<int, int>(fragment.position(), fragment.length()));
			}
		}
		block = block.next();
	}


	QTextCursor cursor(this);
	cursor.beginEditBlock();
	QPair<int, int> pair;
	foreach (pair, fragments) {
		cursor.setPosition(pair.first);
		cursor.movePosition(QTextCursor::Right, QTextCursor::KeepAnchor, pair.second);
		QTextImageFormat format = cursor.charFormat().toImageFormat();
		format.setName(newName);
		cursor.mergeCharFormat(format);
	}

void AudioTextDocumentDirector::processCustomFragment(const QTextFragment& fragment, const QTextDocument* doc)
{
  if ( fragment.charFormat().objectType() != AudioType )
    return Grantlee::MarkupDirector::processCustomFragment( fragment, doc );

  QString name = fragment.charFormat().property( AudioProperty ).toString();

  m_builder->addAudioTag( name );
}

void QTextOdfWriter::writeInlineCharacter(QXmlStreamWriter &writer, const QTextFragment &fragment) const
{
    writer.writeStartElement(drawNS, QString::fromLatin1("frame"));
    if (m_strategy == 0) {
        // don't do anything.
    }
    else if (fragment.charFormat().isImageFormat()) {
        QTextImageFormat imageFormat = fragment.charFormat().toImageFormat();
        writer.writeAttribute(drawNS, QString::fromLatin1("name"), imageFormat.name());

        // vvv  Copy pasted mostly from Qt =================
        QImage image;
        QString name = imageFormat.name();
        if (name.startsWith(QLatin1String(":/"))) // auto-detect resources
            name.prepend(QLatin1String("qrc"));
        QUrl url = QUrl::fromEncoded(name.toUtf8());
        const QVariant data = m_document->resource(QTextDocument::ImageResource, url);
        if (data.type() == QVariant::Image) {
            image = qvariant_cast<QImage>(data);
        } else if (data.type() == QVariant::ByteArray) {
            image.loadFromData(data.toByteArray());
        }

        if (image.isNull()) {
            QString context;
            if (QTextImageHandler::externalLoader)
                image = QTextImageHandler::externalLoader(name, context);

            if (image.isNull()) { // try direct loading
                name = imageFormat.name(); // remove qrc:/ prefix again
                image.load(name);
            }
        }

        // ^^^ Copy pasted mostly from Qt =================
        if (! image.isNull()) {
            QBuffer imageBytes;
            QImageWriter imageWriter(&imageBytes, "png");
            imageWriter.write(image);
            QString filename = m_strategy->createUniqueImageName();
            m_strategy->addFile(filename, QString::fromLatin1("image/png"), imageBytes.data());

            // get the width/height from the format.
            qreal width = (imageFormat.hasProperty(QTextFormat::ImageWidth)) ? imageFormat.width() : image.width();
            writer.writeAttribute(svgNS, QString::fromLatin1("width"), pixelToPoint(width));
            qreal height = (imageFormat.hasProperty(QTextFormat::ImageHeight)) ? imageFormat.height() : image.height();
            writer.writeAttribute(svgNS, QString::fromLatin1("height"), pixelToPoint(height));

            writer.writeStartElement(drawNS, QString::fromLatin1("image"));
            writer.writeAttribute(xlinkNS, QString::fromLatin1("href"), filename);
            writer.writeEndElement(); // image
        }
    }

    writer.writeEndElement(); // frame
}

/*!
  Replaces the entire contents of the document
  with the given HTML-formatted text in the \a text string
*/
void RichString::setHtml(const QString &text)
{
    QTextDocument doc;
    doc.setHtml(text);
    QTextBlock block = doc.firstBlock();
    QTextBlock::iterator it;
    for (it = block.begin(); !(it.atEnd()); ++it) {
        QTextFragment textFragment = it.fragment();
        if (textFragment.isValid()) {
            Format fmt;
            fmt.setFont(textFragment.charFormat().font());
            fmt.setFontColor(textFragment.charFormat().foreground().color());
            addFragment(textFragment.text(), fmt);
        }
    }
}

void ChangeFollower::processUpdates(const QList<int> &changedStyles)
{
    KoStyleManager *sm = m_styleManager.data();
    if (!sm) {
        // since the stylemanager would be the one calling this method, I doubt this
        // will ever happen.  But better safe than sorry..
        deleteLater();
        return;
    }

    // optimization strategy;  store the formatid of the formats we checked into
    // a qset for 'hits' and 'ignores' and avoid the copying of the format
    // (fragment.charFormat() / block.blockFormat()) when the formatId is
    // already checked previosly

    QTextCursor cursor(m_document);
    QTextBlock block = cursor.block();
    while (block.isValid()) {
        QTextBlockFormat bf = block.blockFormat();
        int id = bf.intProperty(KoParagraphStyle::StyleId);
        if (id > 0 && changedStyles.contains(id)) {
            cursor.setPosition(block.position());
            KoParagraphStyle *style = sm->paragraphStyle(id);
            Q_ASSERT(style);

            style->applyStyle(bf);
            cursor.setBlockFormat(bf);
        }
        QTextCharFormat cf = block.charFormat();
        id = cf.intProperty(KoCharacterStyle::StyleId);
        if (id > 0 && changedStyles.contains(id)) {
            KoCharacterStyle *style = sm->characterStyle(id);
            Q_ASSERT(style);
            style->applyStyle(block);
        }

        QTextBlock::iterator iter = block.begin();
        while (! iter.atEnd()) {
            QTextFragment fragment = iter.fragment();
            cf = fragment.charFormat();
            id = cf.intProperty(KoCharacterStyle::StyleId);
            if (id > 0 && changedStyles.contains(id)) {
                // create selection
                cursor.setPosition(fragment.position());
                cursor.setPosition(fragment.position() + fragment.length(), QTextCursor::KeepAnchor);
                KoCharacterStyle *style = sm->characterStyle(id);
                Q_ASSERT(style);

                style->applyStyle(cf);
                cursor.mergeCharFormat(cf);
            }
            iter++;
        }
        block = block.next();
    }
}

EmojiPtr FlatTextarea::getSingleEmoji() const {
	QString text;
	QTextFragment fragment;

	getSingleEmojiFragment(text, fragment);
	
	if (!text.isEmpty()) {
		QTextCharFormat format = fragment.charFormat();
		return emojiFromUrl(static_cast<const QTextImageFormat*>(&format)->name());
	}
	return 0;
}

QString Dialog::toStringFromDocument() {
    QTextDocument *doc = message()->document();
    QString txt;
    for (QTextBlock bl = doc->begin(); bl != doc->end(); bl = bl.next())
        if (bl.isValid()) {
            for (QTextBlock::iterator it = bl.begin(); !it.atEnd(); ++it) {
                QTextFragment fragm = it.fragment();
                if (fragm.isValid() && fragm.charFormat().isImageFormat()) {
                    QString imgName = fragm.charFormat().toImageFormat().name();
                    txt += imgName;
                } else if (fragm.isValid())
                    txt += fragm.text();
            }

            if (bl != doc->begin())
                txt += "\n";
        }
    int i = (int)txt.size() - 1;
    while (i >= 0 && (txt[i] == ' ' || txt[i] == '\n')) --i;
    txt.remove(i + 1, txt.size() - i - 1);
    return txt;
}

EmojiPtr FlatTextarea::getSingleEmoji() const {
	QString text;
	QTextFragment fragment;

	getSingleEmojiFragment(text, fragment);

	if (!text.isEmpty()) {
		QTextCharFormat format = fragment.charFormat();
		QString imageName = static_cast<const QTextImageFormat*>(&format)->name();
		return getEmoji(imageName.mid(8).toUInt(0, 16));
	}
	return 0;
}

int main(int argc, char *argv[])
{
    QApplication app(argc, argv);
    QTextEdit *editor = new QTextEdit;

    QTextDocument *document = new QTextDocument(editor);
    QTextCursor cursor(document);

    QTextImageFormat imageFormat;
    imageFormat.setName(":/images/advert.png");
    cursor.insertImage(imageFormat);

    QTextBlock block = cursor.block();
    QTextFragment fragment;
    QTextBlock::iterator it;

    for (it = block.begin(); !(it.atEnd()); ++it) {
        fragment = it.fragment();

        if (fragment.contains(cursor.position()))
            break;
    }

//! [0]
    if (fragment.isValid()) {
        QTextImageFormat newImageFormat = fragment.charFormat().toImageFormat();

        if (newImageFormat.isValid()) {
            newImageFormat.setName(":/images/newimage.png");
            QTextCursor helper = cursor;

            helper.setPosition(fragment.position());
            helper.setPosition(fragment.position() + fragment.length(),
                               QTextCursor::KeepAnchor);
            helper.setCharFormat(newImageFormat);
//! [0] //! [1]
        }
//! [1] //! [2]
    }
//! [2]

    cursor.insertBlock();
    cursor.insertText("Code less. Create more.");

    editor->setDocument(document);
    editor->setWindowTitle(tr("Text Document Image Format"));
    editor->resize(320, 480);
    editor->show();

    return app.exec();
}

void ChatView::mouseMoveEvent(QMouseEvent *event)
{
    QTextFragment frag = getFragmentUnderMouse(event->pos());
    QString cardName = getCardNameUnderMouse(frag);
    if (!cardName.isEmpty()) {
        viewport()->setCursor(Qt::PointingHandCursor);
        emit cardNameHovered(cardName);
    } else if (frag.charFormat().isAnchor())
        viewport()->setCursor(Qt::PointingHandCursor);
    else
        viewport()->setCursor(Qt::IBeamCursor);

    QTextBrowser::mouseMoveEvent(event);
}

EmojiPtr FlatTextarea::getSingleEmoji() const {
	QString text;
	QTextFragment fragment;

	getSingleEmojiFragment(text, fragment);

	if (!text.isEmpty()) {
		QTextCharFormat format = fragment.charFormat();
		QString imageName = static_cast<QTextImageFormat*>(&format)->name();
		if (imageName.startsWith(qstr("emoji://e."))) {
			return emojiFromUrl(imageName);
		}
	}
	return 0;
}

FormattedMessage FormattedMessage::parse(const QTextDocument *document)
{
	FormattedMessage result;

	QString text;

	QTextBlock block = document->firstBlock();
	bool firstParagraph = true;
	while (block.isValid())
	{
		bool firstFragment = true;
		for (QTextBlock::iterator it = block.begin(); !it.atEnd(); ++it)
		{
			QTextFragment fragment = it.fragment();
			if (!fragment.isValid())
				continue;

			if (!firstParagraph && firstFragment)
				text = '\n' + fragment.text();
			else
				text = fragment.text();

			QTextCharFormat format = fragment.charFormat();
			parseImages(result, text,
				format.font().bold(),
				format.font().italic(),
				format.font().underline(),
				format.foreground().color());

			firstFragment = false;
		}

		if (firstFragment)
			parseImages(result, "\n", false, false, false, QColor());

		block = block.next();
		firstParagraph = false;
	}

	return result;
}

void MoveViewController::selectAndMarkAnchor(const QString& link)
{
    QTextBlock block = this->document->begin();
    while(block != this->document->end())
    {
        QTextBlock::iterator it;
        for(it = block.begin(); !it.atEnd(); ++it)
        {
            QTextFragment fragment = it.fragment();
            if(!fragment.isValid())
            {
                continue;
            }
            QTextCharFormat format = fragment.charFormat();
            if(format.isAnchor() && format.anchorHref() == link)
            {
                QTextCursor cursor = this->textCursor();
                cursor.setPosition(fragment.position());
                int len = 0;
                bool finished = false;
                // we want to mark (highlight) everything from the
                // start of the anchor until the end of the move
                // the end of the move is indicated by an empty space
                // (there is always an empty space after a move)
                while(!finished && !it.atEnd()) {
                    if(it.fragment().text().startsWith(" ") || len >= 6) {
                        finished = true;
                    } else {
                        len+= it.fragment().text().length();
                        it++;
                    }
                }
                cursor.setPosition(fragment.position() + len, QTextCursor::KeepAnchor);
                setTextCursor(cursor);
                ensureCursorVisible();
                return;
            }
        }
    block = block.next();
    }
}

QString TextDocumentSerializer::processFragment(QTextFragment fragment)
{
    QTextCharFormat format = fragment.charFormat();

    QString text = fragment.text();

    if(format.isImageFormat())
        text = getImageTag(format.toImageFormat());

    if(format.fontFamily().contains("Courier"))
        text = QString("<code>%1</code>").arg(text);

    if(format.fontWeight() == QFont::Bold)
        text = QString("<b>%1</b>").arg(text);

    if(format.fontItalic())
        text = QString("<i>%1</i>").arg(text);

    text = text.replace(QChar(0x2028), "<br>");

    return text;
}

QString RichTextLineEdit::toSimpleHtml() const
{
    QString html;
    for (QTextBlock block = document()->begin(); block.isValid();
         block = block.next()) {
        for (QTextBlock::iterator i = block.begin(); !i.atEnd();
             ++i) {
            QTextFragment fragment = i.fragment();
            if (fragment.isValid()) {
                QTextCharFormat format = fragment.charFormat();
                QColor color = format.foreground().color();
                //QString text = Qt::escape(fragment.text()); //deleted for Qt5
                QString text = QString(fragment.text()).toHtmlEscaped(); //added for Qt5

                QStringList tags;
                if (format.verticalAlignment() ==
                    QTextCharFormat::AlignSubScript)
                    tags << "sub";
                else if (format.verticalAlignment() ==
                         QTextCharFormat::AlignSuperScript)
                    tags << "sup";
                if (format.fontItalic())
                    tags << "i";
                if (format.fontWeight() > QFont::Normal)
                    tags << "b";
                if (format.fontStrikeOut())
                    tags << "s";
                while (!tags.isEmpty())
                    text = QString("<%1>%2</%1>")
                                   .arg(tags.takeFirst()).arg(text);
                if (color != QColor(Qt::black))
                    text = QString("<font color=\"%1\">%2</font>")
                                   .arg(color.name()).arg(text);
                html += text;
            }
        }
    }
    return html;
}