QTextEdit和类似bash的彩色输出仿真

我在文本中有一个转义序列，比如

char const * text = "\e[1;33m" "some colored text" "\e[0m";

通常在终端上打印。但我想在QTextEdit中转发此文本

在QTextEdit中使此类文本着色的最简单方法是什么？如何对转义序列进行过滤，即如何用正确的文本格式替换转义序列

我认为有可能出现QSyntaxHighlighter辅助解决方案，但我不知道如何处理转义序列本身以及如何将它们隐藏在输出中。

这些都是。它们的解析非常简单，特别是当您只控制一个小的固定子集时。可能有一些库也可以帮助您解析转义码，如果您认为需要支持比颜色更多的代码，那么尝试找到一个可能是有意义的，但是如果您只需要简单的颜色码并完全控制原始字符串，那么编写自己的代码可能会更快

因此，您需要做的是从字符串中解析这些转义代码，并用替换它们，这是HTML标记的子集

---

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另一种方法可能与此相反：使用HTML（或其他一些）标记存储字符串，然后将其转换为ANSI代码以用于彩色控制台输出。幸运的是，你甚至可以找到一个可以用ANSI转义码将HTML转换为文本的库。

最后，我找到了方法（大家都知道，

QTextEdit:：setReadOnly（true）

）：

//基于以下信息：http://en.m.wikipedia.org/wiki/ANSI_escape_code http://misc.flogisoft.com/bash/tip_colors_and_formatting http://invisible-island.net/xterm/ctlseqs/ctlseqs.html
void main window:：parseEscapeSequence（int属性，QListIterator&i，QTextCharFormat&textCharFormat，QTextCharFormat常量&defaultTextCharFormat）
{
开关（属性）{
案例0:{//Normal/Default（重置所有属性）
textCharFormat=defaultTextCharFormat；
打破
}
案例1:{//Bold/Bright（加粗或增加强度）
textCharFormat.setFontWeight（QFont:：Bold）；
打破
}
病例2：{//Dim/微弱（强度降低）
textCharFormat.setFontWeight（QFont:：Light）；
打破
}
案例3：{//斜体（斜体打开）
textCharFormat.SetFontalitic（true）；
打破
}
案例4:{//下划线（单下划线）
setUnderlineStyle（QTextCharFormat:：SingleUnderliner）；
textCharFormat.setFontUnderline（true）；
打破
}
案例5:{//闪烁（缓慢，显示为粗体）
textCharFormat.setFontWeight（QFont:：Bold）；
打破
}
案例6:{//闪烁（快速，显示为非常粗体）
textCharFormat.setFontWeight（QFont:：Black）；
打破
}
案例7:{//反转/反转（交换前景和背景）
QBrush foregroundBrush=textCharFormat.foreground（）；
setForeground（textCharFormat.background（））；
textCharFormat.setBackground（前地刷）；
打破
}
案例8:{//隐藏/隐藏/不可见（用于密码）
setForeground（textCharFormat.background（））；
打破
}
第9种情况：{//划掉的字符
textCharFormat.setFontStreekeout（true）；
打破
}
案例10:{//主（默认）字体
setFont（defaultTextCharFormat.font（））；
打破
}
案例11…19：{
Qfont数据库；
QString fontFamily=textCharFormat.fontFamily（）；
QStringList fontStyles=fontDatabase.styles（fontFamily）；
int fontStyleIndex=属性-11；
如果（fontStyleIndex// based on information: http://en.m.wikipedia.org/wiki/ANSI_escape_code http://misc.flogisoft.com/bash/tip_colors_and_formatting http://invisible-island.net/xterm/ctlseqs/ctlseqs.html
void MainWindow::parseEscapeSequence(int attribute, QListIterator< QString > & i, QTextCharFormat & textCharFormat, QTextCharFormat const & defaultTextCharFormat)
{
    switch (attribute) {
    case 0 : { // Normal/Default (reset all attributes)
        textCharFormat = defaultTextCharFormat;
        break;
    }
    case 1 : { // Bold/Bright (bold or increased intensity)
        textCharFormat.setFontWeight(QFont::Bold);
        break;
    }
    case 2 : { // Dim/Faint (decreased intensity)
        textCharFormat.setFontWeight(QFont::Light);
        break;
    }
    case 3 : { // Italicized (italic on)
        textCharFormat.setFontItalic(true);
        break;
    }
    case 4 : { // Underscore (single underlined)
        textCharFormat.setUnderlineStyle(QTextCharFormat::SingleUnderline);
        textCharFormat.setFontUnderline(true);
        break;
    }
    case 5 : { // Blink (slow, appears as Bold)
        textCharFormat.setFontWeight(QFont::Bold);
        break;
    }
    case 6 : { // Blink (rapid, appears as very Bold)
        textCharFormat.setFontWeight(QFont::Black);
        break;
    }
    case 7 : { // Reverse/Inverse (swap foreground and background)
        QBrush foregroundBrush = textCharFormat.foreground();
        textCharFormat.setForeground(textCharFormat.background());
        textCharFormat.setBackground(foregroundBrush);
        break;
    }
    case 8 : { // Concealed/Hidden/Invisible (usefull for passwords)
        textCharFormat.setForeground(textCharFormat.background());
        break;
    }
    case 9 : { // Crossed-out characters
        textCharFormat.setFontStrikeOut(true);
        break;
    }
    case 10 : { // Primary (default) font
        textCharFormat.setFont(defaultTextCharFormat.font());
        break;
    }
    case 11 ... 19 : {
        QFontDatabase fontDatabase;
        QString fontFamily = textCharFormat.fontFamily();
        QStringList fontStyles = fontDatabase.styles(fontFamily);
        int fontStyleIndex = attribute - 11;
        if (fontStyleIndex < fontStyles.length()) {
            textCharFormat.setFont(fontDatabase.font(fontFamily, fontStyles.at(fontStyleIndex), textCharFormat.font().pointSize()));
        }
        break;
    }
    case 20 : { // Fraktur (unsupported)
        break;
    }
    case 21 : { // Set Bold off
        textCharFormat.setFontWeight(QFont::Normal);
        break;
    }
    case 22 : { // Set Dim off
        textCharFormat.setFontWeight(QFont::Normal);
        break;
    }
    case 23 : { // Unset italic and unset fraktur
        textCharFormat.setFontItalic(false);
        break;
    }
    case 24 : { // Unset underlining
        textCharFormat.setUnderlineStyle(QTextCharFormat::NoUnderline);
        textCharFormat.setFontUnderline(false);
        break;
    }
    case 25 : { // Unset Blink/Bold
        textCharFormat.setFontWeight(QFont::Normal);
        break;
    }
    case 26 : { // Reserved
        break;
    }
    case 27 : { // Positive (non-inverted)
        QBrush backgroundBrush = textCharFormat.background();
        textCharFormat.setBackground(textCharFormat.foreground());
        textCharFormat.setForeground(backgroundBrush);
        break;
    }
    case 28 : {
        textCharFormat.setForeground(defaultTextCharFormat.foreground());
        textCharFormat.setBackground(defaultTextCharFormat.background());
        break;
    }
    case 29 : {
        textCharFormat.setUnderlineStyle(QTextCharFormat::NoUnderline);
        textCharFormat.setFontUnderline(false);
        break;
    }
    case 30 ... 37 : {
        int colorIndex = attribute - 30;
        QColor color;
        if (QFont::Normal < textCharFormat.fontWeight()) {
            switch (colorIndex) {
            case 0 : {
                color = Qt::darkGray;
                break;
            }
            case 1 : {
                color = Qt::red;
                break;
            }
            case 2 : {
                color = Qt::green;
                break;
            }
            case 3 : {
                color = Qt::yellow;
                break;
            }
            case 4 : {
                color = Qt::blue;
                break;
            }
            case 5 : {
                color = Qt::magenta;
                break;
            }
            case 6 : {
                color = Qt::cyan;
                break;
            }
            case 7 : {
                color = Qt::white;
                break;
            }
            default : {
                Q_ASSERT(false);
            }
            }
        } else {
            switch (colorIndex) {
            case 0 : {
                color = Qt::black;
                break;
            }
            case 1 : {
                color = Qt::darkRed;
                break;
            }
            case 2 : {
                color = Qt::darkGreen;
                break;
            }
            case 3 : {
                color = Qt::darkYellow;
                break;
            }
            case 4 : {
                color = Qt::darkBlue;
                break;
            }
            case 5 : {
                color = Qt::darkMagenta;
                break;
            }
            case 6 : {
                color = Qt::darkCyan;
                break;
            }
            case 7 : {
                color = Qt::lightGray;
                break;
            }
            default : {
                Q_ASSERT(false);
            }
            }
        }
        textCharFormat.setForeground(color);
        break;
    }
    case 38 : {
        if (i.hasNext()) {
            bool ok = false;
            int selector = i.next().toInt(&ok);
            Q_ASSERT(ok);
            QColor color;
            switch (selector) {
            case 2 : {
                if (!i.hasNext()) {
                    break;
                }
                int red = i.next().toInt(&ok);
                Q_ASSERT(ok);
                if (!i.hasNext()) {
                    break;
                }
                int green = i.next().toInt(&ok);
                Q_ASSERT(ok);
                if (!i.hasNext()) {
                    break;
                }
                int blue = i.next().toInt(&ok);
                Q_ASSERT(ok);
                color.setRgb(red, green, blue);
                break;
            }
            case 5 : {
                if (!i.hasNext()) {
                    break;
                }
                int index = i.next().toInt(&ok);
                Q_ASSERT(ok);
                switch (index) {
                case 0x00 ... 0x07 : { // 0x00-0x07:  standard colors (as in ESC [ 30..37 m)
                    return parseEscapeSequence(index - 0x00 + 30, i, textCharFormat, defaultTextCharFormat);
                }
                case 0x08 ... 0x0F : { // 0x08-0x0F:  high intensity colors (as in ESC [ 90..97 m)
                    return parseEscapeSequence(index - 0x08 + 90, i, textCharFormat, defaultTextCharFormat);
                }
                case 0x10 ... 0xE7 : { // 0x10-0xE7:  6*6*6=216 colors: 16 + 36*r + 6*g + b (0≤r,g,b≤5)
                    index -= 0x10;
                    int red = index % 6;
                    index /= 6;
                    int green = index % 6;
                    index /= 6;
                    int blue = index % 6;
                    index /= 6;
                    Q_ASSERT(index == 0);
                    color.setRgb(red, green, blue);
                    break;
                }
                case 0xE8 ... 0xFF : { // 0xE8-0xFF:  grayscale from black to white in 24 steps
                    qreal intensity = qreal(index - 0xE8) / (0xFF - 0xE8);
                    color.setRgbF(intensity, intensity, intensity);
                    break;
                }
                }
                textCharFormat.setForeground(color);
                break;
            }
            default : {
                break;
            }
            }
        }
        break;
    }
    case 39 : {
        textCharFormat.setForeground(defaultTextCharFormat.foreground());
        break;
    }
    case 40 ... 47 : {
        int colorIndex = attribute - 40;
        QColor color;
        switch (colorIndex) {
        case 0 : {
            color = Qt::darkGray;
            break;
        }
        case 1 : {
            color = Qt::red;
            break;
        }
        case 2 : {
            color = Qt::green;
            break;
        }
        case 3 : {
            color = Qt::yellow;
            break;
        }
        case 4 : {
            color = Qt::blue;
            break;
        }
        case 5 : {
            color = Qt::magenta;
            break;
        }
        case 6 : {
            color = Qt::cyan;
            break;
        }
        case 7 : {
            color = Qt::white;
            break;
        }
        default : {
            Q_ASSERT(false);
        }
        }
        textCharFormat.setBackground(color);
        break;
    }
    case 48 : {
        if (i.hasNext()) {
            bool ok = false;
            int selector = i.next().toInt(&ok);
            Q_ASSERT(ok);
            QColor color;
            switch (selector) {
            case 2 : {
                if (!i.hasNext()) {
                    break;
                }
                int red = i.next().toInt(&ok);
                Q_ASSERT(ok);
                if (!i.hasNext()) {
                    break;
                }
                int green = i.next().toInt(&ok);
                Q_ASSERT(ok);
                if (!i.hasNext()) {
                    break;
                }
                int blue = i.next().toInt(&ok);
                Q_ASSERT(ok);
                color.setRgb(red, green, blue);
                break;
            }
            case 5 : {
                if (!i.hasNext()) {
                    break;
                }
                int index = i.next().toInt(&ok);
                Q_ASSERT(ok);
                switch (index) {
                case 0x00 ... 0x07 : { // 0x00-0x07:  standard colors (as in ESC [ 40..47 m)
                    return parseEscapeSequence(index - 0x00 + 40, i, textCharFormat, defaultTextCharFormat);
                }
                case 0x08 ... 0x0F : { // 0x08-0x0F:  high intensity colors (as in ESC [ 100..107 m)
                    return parseEscapeSequence(index - 0x08 + 100, i, textCharFormat, defaultTextCharFormat);
                }
                case 0x10 ... 0xE7 : { // 0x10-0xE7:  6*6*6=216 colors: 16 + 36*r + 6*g + b (0≤r,g,b≤5)
                    index -= 0x10;
                    int red = index % 6;
                    index /= 6;
                    int green = index % 6;
                    index /= 6;
                    int blue = index % 6;
                    index /= 6;
                    Q_ASSERT(index == 0);
                    color.setRgb(red, green, blue);
                    break;
                }
                case 0xE8 ... 0xFF : { // 0xE8-0xFF:  grayscale from black to white in 24 steps
                    qreal intensity = qreal(index - 0xE8) / (0xFF - 0xE8);
                    color.setRgbF(intensity, intensity, intensity);
                    break;
                }
                }
                textCharFormat.setBackground(color);
                break;
            }
            default : {
                break;
            }
            }
        }
        break;
    }
    case 49 : {
        textCharFormat.setBackground(defaultTextCharFormat.background());
        break;
    }
    case 90 ... 97 : {
        int colorIndex = attribute - 90;
        QColor color;
        switch (colorIndex) {
        case 0 : {
            color = Qt::darkGray;
            break;
        }
        case 1 : {
            color = Qt::red;
            break;
        }
        case 2 : {
            color = Qt::green;
            break;
        }
        case 3 : {
            color = Qt::yellow;
            break;
        }
        case 4 : {
            color = Qt::blue;
            break;
        }
        case 5 : {
            color = Qt::magenta;
            break;
        }
        case 6 : {
            color = Qt::cyan;
            break;
        }
        case 7 : {
            color = Qt::white;
            break;
        }
        default : {
            Q_ASSERT(false);
        }
        }
        color.setRedF(color.redF() * 0.8);
        color.setGreenF(color.greenF() * 0.8);
        color.setBlueF(color.blueF() * 0.8);
        textCharFormat.setForeground(color);
        break;
    }
    case 100 ... 107 : {
        int colorIndex = attribute - 100;
        QColor color;
        switch (colorIndex) {
        case 0 : {
            color = Qt::darkGray;
            break;
        }
        case 1 : {
            color = Qt::red;
            break;
        }
        case 2 : {
            color = Qt::green;
            break;
        }
        case 3 : {
            color = Qt::yellow;
            break;
        }
        case 4 : {
            color = Qt::blue;
            break;
        }
        case 5 : {
            color = Qt::magenta;
            break;
        }
        case 6 : {
            color = Qt::cyan;
            break;
        }
        case 7 : {
            color = Qt::white;
            break;
        }
        default : {
            Q_ASSERT(false);
        }
        }
        color.setRedF(color.redF() * 0.8);
        color.setGreenF(color.greenF() * 0.8);
        color.setBlueF(color.blueF() * 0.8);
        textCharFormat.setBackground(color);
        break;
    }
    default : {
        break;
    }
    }
}

void MainWindow::setTextTermFormatting(QTextEdit * textEdit, QString const & text)
{
    QTextDocument * document = textEdit->document();
    QRegExp const escapeSequenceExpression(R"(\x1B\[([\d;]+)m)");
    QTextCursor cursor(document);
    QTextCharFormat const defaultTextCharFormat = cursor.charFormat();
    cursor.beginEditBlock();
    int offset = escapeSequenceExpression.indexIn(text);
    cursor.insertText(text.mid(0, offset));
    QTextCharFormat textCharFormat = defaultTextCharFormat;
    while (!(offset < 0)) {
        int previousOffset = offset + escapeSequenceExpression.matchedLength();
        QStringList capturedTexts = escapeSequenceExpression.capturedTexts().back().split(';');
        QListIterator< QString > i(capturedTexts);
        while (i.hasNext()) {
            bool ok = false;
            int attribute = i.next().toInt(&ok);
            Q_ASSERT(ok);
            parseEscapeSequence(attribute, i, textCharFormat, defaultTextCharFormat);
        }
        offset = escapeSequenceExpression.indexIn(text, previousOffset);
        if (offset < 0) {
            cursor.insertText(text.mid(previousOffset), textCharFormat);
        } else {
            cursor.insertText(text.mid(previousOffset, offset - previousOffset), textCharFormat);
        }
    }
    cursor.setCharFormat(defaultTextCharFormat);
    cursor.endEditBlock();
    //cursor.movePosition(QTextCursor::Start);
    textEdit->setTextCursor(cursor);
}