qcssparser.cpp

奇趣公司比较新的qt/emd版本

    return hit;
}

bool ValueExtractor::extractPosition(int *left, int *top, int *right, int *bottom, QCss::Origin *origin,
                                     Qt::Alignment *position, QCss::PositionMode *mode, Qt::Alignment *textAlignment)
{
    extractFont();
    bool hit = false;
    for (int i = 0; i < declarations.count(); i++) {
        const Declaration &decl = declarations.at(i);
        switch (decl.propertyId) {
        case Left: *left = lengthValue(decl); break;
        case Top: *top = lengthValue(decl); break;
        case Right: *right = lengthValue(decl); break;
        case Bottom: *bottom = lengthValue(decl); break;
        case QtOrigin: *origin = decl.originValue(); break;
        case QtPosition: *position = decl.alignmentValue(); break;
        case TextAlignment: *textAlignment = decl.alignmentValue(); break;
        case Position: *mode = decl.positionValue(); break;
        default: continue;
        }
        hit = true;
    }

    return hit;
}

bool ValueExtractor::extractBox(int *margins, int *paddings, int *spacing)
{
    extractFont();
    bool hit = false;
    for (int i = 0; i < declarations.count(); i++) {
        const Declaration &decl = declarations.at(i);
        switch (decl.propertyId) {
        case PaddingLeft: paddings[LeftEdge] = lengthValue(decl); break;
        case PaddingRight: paddings[RightEdge] = lengthValue(decl); break;
        case PaddingTop: paddings[TopEdge] = lengthValue(decl); break;
        case PaddingBottom: paddings[BottomEdge] = lengthValue(decl); break;
        case Padding: lengthValues(decl, paddings); break;

        case MarginLeft: margins[LeftEdge] = lengthValue(decl); break;
        case MarginRight: margins[RightEdge] = lengthValue(decl); break;
        case MarginTop: margins[TopEdge] = lengthValue(decl); break;
        case MarginBottom: margins[BottomEdge] = lengthValue(decl); break;
        case Margin: lengthValues(decl, margins); break;
        case QtSpacing: if (spacing) *spacing = lengthValue(decl); break;

        default: continue;
        }
        hit = true;
    }

    return hit;
}

int ValueExtractor::extractStyleFeatures()
{
    int features = StyleFeature_None;
    for (int i = 0; i < declarations.count(); i++) {
        const Declaration &decl = declarations.at(i);
        if (decl.propertyId == QtStyleFeatures)
            features = decl.styleFeaturesValue();
    }
    return features;
}

QSize ValueExtractor::sizeValue(const Declaration &decl)
{
    int x[2] = { 0, 0 };
    if (decl.values.count() > 0)
        x[0] = lengthValue(decl.values.at(0));
    if (decl.values.count() > 1)
        x[1] = lengthValue(decl.values.at(1));
    else
        x[1] = x[0];
    return QSize(x[0], x[1]);
}

void ValueExtractor::sizeValues(const Declaration &decl, QSize *radii)
{
    radii[0] = sizeValue(decl);
    for (int i = 1; i < 4; i++)
        radii[i] = radii[0];
}

bool ValueExtractor::extractBorder(int *borders, QBrush *colors, BorderStyle *styles,
                                   QSize *radii)
{
    extractFont();
    bool hit = false;
    for (int i = 0; i < declarations.count(); i++) {
        const Declaration &decl = declarations.at(i);
        switch (decl.propertyId) {
        case BorderLeftWidth: borders[LeftEdge] = lengthValue(decl); break;
        case BorderRightWidth: borders[RightEdge] = lengthValue(decl); break;
        case BorderTopWidth: borders[TopEdge] = lengthValue(decl); break;
        case BorderBottomWidth: borders[BottomEdge] = lengthValue(decl); break;
        case BorderWidth: lengthValues(decl, borders); break;

        case BorderLeftColor: colors[LeftEdge] = decl.brushValue(pal); break;
        case BorderRightColor: colors[RightEdge] = decl.brushValue(pal); break;
        case BorderTopColor: colors[TopEdge] = decl.brushValue(pal); break;
        case BorderBottomColor: colors[BottomEdge] = decl.brushValue(pal); break;
        case BorderColor: decl.brushValues(colors, pal); break;

        case BorderTopStyle: styles[TopEdge] = decl.styleValue(); break;
        case BorderBottomStyle: styles[BottomEdge] = decl.styleValue(); break;
        case BorderLeftStyle: styles[LeftEdge] = decl.styleValue(); break;
        case BorderRightStyle: styles[RightEdge] = decl.styleValue(); break;
        case BorderStyles:  decl.styleValues(styles); break;

        case BorderTopLeftRadius: radii[0] = sizeValue(decl); break;
        case BorderTopRightRadius: radii[1] = sizeValue(decl); break;
        case BorderBottomLeftRadius: radii[2] = sizeValue(decl); break;
        case BorderBottomRightRadius: radii[3] = sizeValue(decl); break;
        case BorderRadius: sizeValues(decl, radii); break;

        case BorderLeft:
            borderValue(decl, &borders[LeftEdge], &styles[LeftEdge], &colors[LeftEdge]);
            break;
        case BorderTop:
            borderValue(decl, &borders[TopEdge], &styles[TopEdge], &colors[TopEdge]);
            break;
        case BorderRight:
            borderValue(decl, &borders[RightEdge], &styles[RightEdge], &colors[RightEdge]);
            break;
        case BorderBottom:
            borderValue(decl, &borders[BottomEdge], &styles[BottomEdge], &colors[BottomEdge]);
            break;
        case Border:
            borderValue(decl, &borders[LeftEdge], &styles[LeftEdge], &colors[LeftEdge]);
            borders[TopEdge] = borders[RightEdge] = borders[BottomEdge] = borders[LeftEdge];
            styles[TopEdge] = styles[RightEdge] = styles[BottomEdge] = styles[LeftEdge];
            colors[TopEdge] = colors[RightEdge] = colors[BottomEdge] = colors[LeftEdge];
            break;

        default: continue;
        }
        hit = true;
    }

    return hit;
}

static Qt::Alignment parseAlignment(const Value *values, int count)
{
    Qt::Alignment a[2] = { 0, 0 };
    for (int i = 0; i < qMin(2, count); i++) {
        if (values[i].type != Value::KnownIdentifier)
            break;
        switch (values[i].variant.toInt()) {
        case Value_Left: a[i] = Qt::AlignLeft; break;
        case Value_Right: a[i] = Qt::AlignRight; break;
        case Value_Top: a[i] = Qt::AlignTop; break;
        case Value_Bottom: a[i] = Qt::AlignBottom; break;
        case Value_Center: a[i] = Qt::AlignCenter; break;
        default: break;
        }
    }

    if (a[0] == Qt::AlignCenter && a[1] != 0 && a[1] != Qt::AlignCenter)
        a[0] = (a[1] == Qt::AlignLeft || a[1] == Qt::AlignRight) ? Qt::AlignVCenter : Qt::AlignHCenter;
    if ((a[1] == 0 || a[1] == Qt::AlignCenter) && a[0] != Qt::AlignCenter)
        a[1] = (a[0] == Qt::AlignLeft || a[0] == Qt::AlignRight) ? Qt::AlignVCenter : Qt::AlignHCenter;
    return a[0] | a[1];
}

static QColor parseColorValue(Value v, const QPalette &pal)
{
    if (v.type == Value::Identifier || v.type == Value::String) {
        v.variant.convert(QVariant::Color);
        v.type = Value::Color;
    }

    if (v.type == Value::Color)
        return qvariant_cast<QColor>(v.variant);

    if (v.type == Value::KnownIdentifier && v.variant.toInt() == Value_Transparent)
        return Qt::transparent;

    if (v.type != Value::Function)
        return QColor();

    QStringList lst = v.variant.toStringList();
    if (lst.count() != 2)
        return QColor();

    if ((lst.at(0).compare(QLatin1String("palette"), Qt::CaseInsensitive)) == 0) {
        int role = findKnownValue(lst.at(1), values, NumKnownValues);
        if (role >= Value_FirstColorRole && role <= Value_LastColorRole)
            return pal.color((QPalette::ColorRole)(role-Value_FirstColorRole));

        return QColor();
    }

    bool rgb = true;

    // function name
    if ((lst.at(0).compare(QLatin1String("rgb"), Qt::CaseInsensitive) != 0)
        && (rgb = (lst.at(0).compare(QLatin1String("rgba"), Qt::CaseInsensitive) != 0)))
        return QColor();

    Parser p(lst.at(1));
    if (!p.testExpr())
        return QColor();

    QVector<Value> colorDigits;
    if (!p.parseExpr(&colorDigits))
        return QColor();

    if ((colorDigits.count() != (rgb ? 5 : 7))
        || colorDigits.at(1).type != Value::TermOperatorComma
        || colorDigits.at(3).type != Value::TermOperatorComma
        || (!rgb && colorDigits.at(5).type != Value::TermOperatorComma))
        return QColor();

    for (int i = 0; i < (rgb ? 5 : 7); i += 2) {
        if (colorDigits.at(i).type == Value::Percentage) {
            colorDigits[i].variant = colorDigits.at(i).variant.toDouble() * 255. / 100.;
            colorDigits[i].type = Value::Number;
        }
    }

    return QColor(colorDigits.at(0).variant.toInt(),
                  colorDigits.at(2).variant.toInt(),
                  colorDigits.at(4).variant.toInt(),
                  !rgb ? colorDigits.at(6).variant.toInt() : 255);
}

static QBrush parseBrushValue(Value v, const QPalette &pal)
{
    QColor c = parseColorValue(v, pal);
    if (c.isValid())
        return QBrush(c);

    if (v.type != Value::Function)
        return QBrush();

    QStringList lst = v.variant.toStringList();
    if (lst.count() != 2)
        return QBrush();

    QStringList gradFuncs;
    gradFuncs << QLatin1String("qlineargradient") << QLatin1String("qradialgradient") << QLatin1String("qconicalgradient") << QLatin1String("qgradient");
    int gradType = -1;

    if ((gradType = gradFuncs.indexOf(lst.at(0).toLower())) == -1)
        return QBrush();

    QHash<QString, qreal> vars;
    QVector<QGradientStop> stops;

    int spread = -1;
    QStringList spreads;
    spreads << QLatin1String("pad") << QLatin1String("reflect") << QLatin1String("repeat");

    Parser parser(lst.at(1));
    while (parser.hasNext()) {
        parser.skipSpace();
        if (!parser.test(IDENT))
            return QBrush();
        QString attr = parser.lexem();
        parser.skipSpace();
        if (!parser.test(COLON))
            return QBrush();
        parser.skipSpace();
        if (attr.compare(QLatin1String("stop"), Qt::CaseInsensitive) == 0) {
            Value stop, color;
            parser.next();
            if (!parser.parseTerm(&stop)) return QBrush();
            parser.skipSpace();
            parser.next();
            if (!parser.parseTerm(&color)) return QBrush();
            stops.append(QGradientStop(stop.variant.toDouble(), parseColorValue(color, pal)));
        } else {
            parser.next();
            Value value;
            parser.parseTerm(&value);
            if (attr.compare(QLatin1String("spread"), Qt::CaseInsensitive) == 0) {
                spread = spreads.indexOf(value.variant.toString());
            } else {
                vars[attr] = value.variant.toString().toDouble();
            }
        }
        parser.skipSpace();
        parser.test(COMMA);
    }

    if (gradType == 0) {
        QLinearGradient lg(vars.value(QLatin1String("x1")), vars.value(QLatin1String("y1")),
                           vars.value(QLatin1String("x2")), vars.value(QLatin1String("y2")));
        lg.setCoordinateMode(QGradient::ObjectBoundingMode);
        lg.setStops(stops);
        if (spread != -1)
            lg.setSpread(QGradient::Spread(spread));
        return QBrush(lg);
    }

    if (gradType == 1) {
        QRadialGradient rg(vars.value(QLatin1String("cx")), vars.value(QLatin1String("cy")),
                           vars.value(QLatin1String("radius")), vars.value(QLatin1String("fx")),
                           vars.value(QLatin1String("fy")));
        rg.setCoordinateMode(QGradient::ObjectBoundingMode);
        rg.setStops(stops);
        if (spread != -1)
            rg.setSpread(QGradient::Spread(spread));
        return QBrush(rg);
    }

    if (gradType == 2) {
        QConicalGradient cg(vars.value(QLatin1String("cx")), vars.value(QLatin1String("cy")),
                            vars.value(QLatin1String("angle")));
        cg.setCoordinateMode(QGradient::ObjectBoundingMode);
        cg.setStops(stops);
        if (spread != -1)
            cg.setSpread(QGradient::Spread(spread));
        return QBrush(cg);
    }

    return QBrush();
}

static BorderStyle parseStyleValue(Value v)
{
    if (v.type == Value::KnownIdentifier) {
        switch (v.variant.toInt()) {
        case Value_None:
            return BorderStyle_None;
        case Value_Dotted:
            return BorderStyle_Dotted;
        case Value_Dashed:
            return BorderStyle_Dashed;
        case Value_Solid:
            return BorderStyle_Solid;
        case Value_Double:
            return BorderStyle_Double;
        case Value_DotDash:
            return BorderStyle_DotDash;
        case Value_DotDotDash:
            return BorderStyle_DotDotDash;
        case Value_Groove:
            return BorderStyle_Groove;
        case Value_Ridge:
            return BorderStyle_Ridge;
        case Value_Inset:
            return BorderStyle_Inset;
        case Value_Outset:
            return BorderStyle_Outset;
        case Value_Native:
            return BorderStyle_Native;
        default:
            break;
        }
    }

    return BorderStyle_Unknown;
}

void ValueExtractor::borderValue(const Declaration &decl, int *width, QCss::BorderStyle *style, QBrush *color)
{
    *width = 0;
    *style = BorderStyle_None;
    *color = QColor();

    if (decl.values.isEmpty())
        return;

    int i = 0;
    if (decl.values.at(i).type == Value::Length || decl.values.at(i).type == Value::Number) {
        *width = lengthValue(decl.values.at(i));
        if (++i >= decl.values.count())
            return;
    }

    *style = parseStyleValue(decl.values.at(i));
    if (*style != BorderStyle_Unknown) {
        if (++i >= decl.values.count())
            return;
    } else {
        *style = BorderStyle_None;
    }

    *color = parseBrushValue(decl.values.at(i), pal);
}

static void parseShorthandBackgroundProperty(const QVector<Value> &values, QBrush *brush, QString *image, Repeat *repeat, Qt::Alignment *alignment, const QPalette &pal)
{
    *brush = QBrush();
    *image = QString();
    *repeat = Repeat_XY;
    *alignment = Qt::AlignTop | Qt::AlignLeft;

    for (int i = 0; i < values.count(); ++i) {
        const Value v = values.at(i);
        if (v.type == Value::Uri) {
            *image = v.variant.toString();
            continue;
        } else if (v.type == Value::KnownIdentifier && v.variant.toInt() == Value_None) {
            *image = QString();
            continue;
        }

        Repeat repeatAttempt = static_cast<Repeat>(findKnownValue(v.variant.toString(),
                                                   repeats, NumKnownRepeats));
        if (repeatAttempt != Repeat_Unknown) {
            *repeat = repeatAttempt;
            continue;
        }

        if (v.type == Value::KnownIdentifier) {
            const int start = i;
            int count = 1;