From QString to QWebView.

[bunjee]

Hey guys,

I want to convert a QString to utf8 html compliant so it can be viewed in a QWebPage.

QTextCodec *codec = QTextCodec::codecForName("UTF-8");
QByteArray string = codec->fromUnicode(output);

QTextCodec *codec = QTextCodec::codecForName("UTF-8");
QByteArray string = codec->fromUnicode(output);

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I tried the above with no succes.

[yogeshgokul]

I am not sure what QWebPage got to do with UTF.
Though to convert QString to UTF, use this:

QString::toUtf8();

QString::toUtf8();

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[bunjee]

Consider this:

QByteArray string = string.toUtf8();
 
for (int i = 0; i < string.size(); i++)
{
      qDebug("%c", string.at(i));
}

QByteArray string = string.toUtf8();

for (int i = 0; i < string.size(); i++)
{
      qDebug("%c", string.at(i));
}

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That doesn't print the UTF8 byte sequence.

[yogeshgokul]

You can use:

qDebug() << yourString

qDebug() << yourString

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[bunjee]

UTF-8 encodes each character (code point) in 1 to 4 octets (8-bit bytes), with the single octet encoding used only for the 128 US-ASCII characters

I want to print the full byte sequence.

see http://www.tony-franks.co.uk/UTF-8.htm

[yogeshgokul]

QByteArray ba("Hello world");
 char *data = ba.data();
 while (*data) {
     cout << "[" << *data << "]" << endl;
     ++data;
 }

QByteArray ba("Hello world");
 char *data = ba.data();
 while (*data) {
     cout << "[" << *data << "]" << endl;
     ++data;
 }

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[bunjee]

QByteArray ba(QString("©").toUtf8());
char *data = ba.data();
while (*data)
{
    qkDebug("[%c]",  *data);
    ++data;
}

QByteArray ba(QString("©").toUtf8());
char *data = ba.data();
while (*data)
{
    qkDebug("[%c]",  *data);
    ++data;
}

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Output:

[Â][©]

[Â][©]

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This is not the conversion I want.

I expect "[&][#][1][6][9][;]";.

[yogeshgokul]

You have used %c, and it will print the character represented by byte. If you want a hexadecimal byte representation of your string. Why dont you use old school printf.

QByteArray ba(QString("©").toUtf8());
char *data = ba.data();
while (*data)
{
    printf("%x", *data);
    ++data;
}

QByteArray ba(QString("©").toUtf8());
char *data = ba.data();
while (*data)
{
    printf("%x", *data);
    ++data;
}

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[bunjee]

Thans for the replies,

EDIT: What I want is an UTF8 html encoded string.

[yogeshgokul]

I want.
I expect "[&][#][1][6][9][;]";.

If you can theoretically prove it.
I will give you code.
When you want to print a byte sequence, you have to decide the representation. A possible representation is hex. That I already told you how to do that. But your expected result is :

I expect "[&][#][1][6][9][;]";.

I dont know what is it. Can you please tell me whats in side []. a character/hex value/int /or something else.

[wysota]

You want the sgml entity, not a "utf-8 sequence" - there is no such thing.

Qt will not encode sgml entities by itself. You need to do that manually:

QString in;
QString out;
for(int i=0; i<in.size();i++){
    QChar c = in[i];
    if(c.toAscii()>127){
        out.append(QString("&#%1;").arg((int)c.toAscii()));
    } else out += c;
}

QString in;
QString out;
for(int i=0; i<in.size();i++){
    QChar c = in[i];
    if(c.toAscii()>127){
        out.append(QString("&#%1;").arg((int)c.toAscii()));
    } else out += c;
}

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This is a rough implementation which will not work for multi-octet characters - you need to adjust the if block for that.

[bunjee]

Nothing to add,

I missed the point on this one.
Thanks guys.

[bunjee]

Here is a first shot of a "toHtmlUtf8" method in my inherited QString class:

QString qkString::toHtmlUtf8() const
{
    QString result;
    for (int i = 0; i < size(); i++)
    {
        QChar c = at(i);
        char ascii = c.toAscii();
 
        if (ascii == ' ')
        {
            result += "&nbsp;";
        }
        else if (ascii == '\n')
        {
            result += "<br>";
        }
        else if (ascii < 48 || ascii > 122)
        {
            QByteArray bytes = QString(c).toUtf8();
 
            if (bytes.size() == 1)
            {
                result += QString("&#%1;").arg(QString::number(bytes.at(0)));
            }
            else
            {
                // FIXME
                // Insert multi byte code here
            }
            else result += "[?]";
        }
        else result += c;
    }
 
    return result;
}

QString qkString::toHtmlUtf8() const
{
    QString result;
    for (int i = 0; i < size(); i++)
    {
        QChar c = at(i);
        char ascii = c.toAscii();

        if (ascii == ' ')
        {
            result += "&nbsp;";
        }
        else if (ascii == '\n')
        {
            result += "<br>";
        }
        else if (ascii < 48 || ascii > 122)
        {
            QByteArray bytes = QString(c).toUtf8();

            if (bytes.size() == 1)
            {
                result += QString("&#%1;").arg(QString::number(bytes.at(0)));
            }
            else
            {
                // FIXME
                // Insert multi byte code here
            }
            else result += "[?]";
        }
        else result += c;
    }

    return result;
}

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Little help on the FIXME wouldn't hurt.