qcssparser.cpp

奇趣公司比较新的qt/emd版本

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#include "qcssparser_p.h"

#include <qdebug.h>
#include <qcolor.h>
#include <qfont.h>
#include <qfileinfo.h>
#include <qfontmetrics.h>
#include <qbrush.h>

#include "qcssscanner.cpp"

using namespace QCss;

const char *Scanner::tokenName(TokenType t)
{
    switch (t) {
        case NONE: return "NONE";
        case S: return "S";
        case CDO: return "CDO";
        case CDC: return "CDC";
        case INCLUDES: return "INCLUDES";
        case DASHMATCH: return "DASHMATCH";
        case LBRACE: return "LBRACE";
        case PLUS: return "PLUS";
        case GREATER: return "GREATER";
        case COMMA: return "COMMA";
        case STRING: return "STRING";
        case INVALID: return "INVALID";
        case IDENT: return "IDENT";
        case HASH: return "HASH";
        case ATKEYWORD_SYM: return "ATKEYWORD_SYM";
        case EXCLAMATION_SYM: return "EXCLAMATION_SYM";
        case LENGTH: return "LENGTH";
        case PERCENTAGE: return "PERCENTAGE";
        case NUMBER: return "NUMBER";
        case FUNCTION: return "FUNCTION";
        case COLON: return "COLON";
        case SEMICOLON: return "SEMICOLON";
        case RBRACE: return "RBRACE";
        case SLASH: return "SLASH";
        case MINUS: return "MINUS";
        case DOT: return "DOT";
        case STAR: return "STAR";
        case LBRACKET: return "LBRACKET";
        case RBRACKET: return "RBRACKET";
        case EQUAL: return "EQUAL";
        case LPAREN: return "LPAREN";
        case RPAREN: return "RPAREN";
        case OR: return "OR";
    }
    return "";
}

struct QCssKnownValue
{
    const char *name;
    int id;
};

static const QCssKnownValue properties[NumProperties - 1] = {
    { "-qt-background-role", QtBackgroundRole },
    { "-qt-block-indent", QtBlockIndent },
    { "-qt-list-indent", QtListIndent },
    { "-qt-paragraph-type", QtParagraphType },
    { "-qt-style-features", QtStyleFeatures },
    { "-qt-table-type", QtTableType },
    { "-qt-user-state", QtUserState },
    { "alternate-background-color", QtAlternateBackground },
    { "background", Background },
    { "background-attachment", BackgroundAttachment },
    { "background-clip", BackgroundClip },
    { "background-color", BackgroundColor },
    { "background-image", BackgroundImage },
    { "background-origin", BackgroundOrigin },
    { "background-position", BackgroundPosition },
    { "background-repeat", BackgroundRepeat },
    { "border", Border },
    { "border-bottom", BorderBottom },
    { "border-bottom-color", BorderBottomColor },
    { "border-bottom-left-radius", BorderBottomLeftRadius },
    { "border-bottom-right-radius", BorderBottomRightRadius },
    { "border-bottom-style", BorderBottomStyle },
    { "border-bottom-width", BorderBottomWidth },
    { "border-color", BorderColor },
    { "border-image", BorderImage },
    { "border-left", BorderLeft },
    { "border-left-color", BorderLeftColor },
    { "border-left-style", BorderLeftStyle },
    { "border-left-width", BorderLeftWidth },
    { "border-radius", BorderRadius },
    { "border-right", BorderRight },
    { "border-right-color", BorderRightColor },
    { "border-right-style", BorderRightStyle },
    { "border-right-width", BorderRightWidth },
    { "border-style", BorderStyles },
    { "border-top", BorderTop },
    { "border-top-color", BorderTopColor },
    { "border-top-left-radius", BorderTopLeftRadius },
    { "border-top-right-radius", BorderTopRightRadius },
    { "border-top-style", BorderTopStyle },
    { "border-top-width", BorderTopWidth },
    { "border-width", BorderWidth },
    { "bottom", Bottom },
    { "color", Color },
    { "float", Float },
    { "font", Font },
    { "font-family", FontFamily },
    { "font-size", FontSize },
    { "font-style", FontStyle },
    { "font-weight", FontWeight },
    { "height", Height },
    { "image", QtImage },
    { "image-position", QtImageAlignment },
    { "left", Left },
    { "list-style", ListStyle },
    { "list-style-type", ListStyleType },
    { "margin" , Margin },
    { "margin-bottom", MarginBottom },
    { "margin-left", MarginLeft },
    { "margin-right", MarginRight },
    { "margin-top", MarginTop },
    { "max-height", MaximumHeight },
    { "max-width", MaximumWidth },
    { "min-height", MinimumHeight },
    { "min-width", MinimumWidth },
    { "padding", Padding },
    { "padding-bottom", PaddingBottom },
    { "padding-left", PaddingLeft },
    { "padding-right", PaddingRight },
    { "padding-top", PaddingTop },
    { "page-break-after", PageBreakAfter },
    { "page-break-before", PageBreakBefore },
    { "position", Position },
    { "right", Right },
    { "selection-background-color", QtSelectionBackground },
    { "selection-color", QtSelectionForeground },
    { "spacing", QtSpacing },
    { "subcontrol-origin", QtOrigin },
    { "subcontrol-position", QtPosition },
    { "text-align", TextAlignment },
    { "text-decoration", TextDecoration },
    { "text-indent", TextIndent },
    { "text-underline-style", TextUnderlineStyle },
    { "top", Top },
    { "vertical-align", VerticalAlignment },
    { "white-space", Whitespace },
    { "width", Width }
};

static const QCssKnownValue values[NumKnownValues - 1] = {
    { "alternate-base", Value_AlternateBase },
    { "always", Value_Always },
    { "auto", Value_Auto },
    { "base", Value_Base },
    { "bold", Value_Bold },
    { "bottom", Value_Bottom },
    { "bright-text", Value_BrightText },
    { "button", Value_Button },
    { "button-text", Value_ButtonText },
    { "center", Value_Center },
    { "circle", Value_Circle },
    { "dark", Value_Dark },
    { "dashed", Value_Dashed },
    { "decimal", Value_Decimal },
    { "disc", Value_Disc },
    { "dot-dash", Value_DotDash },
    { "dot-dot-dash", Value_DotDotDash },
    { "dotted", Value_Dotted },
    { "double", Value_Double },
    { "groove", Value_Groove },
    { "highlight", Value_Highlight },
    { "highlighted-text", Value_HighlightedText },
    { "inset", Value_Inset },
    { "italic", Value_Italic },
    { "large", Value_Large },
    { "left", Value_Left },
    { "light", Value_Light },
    { "line-through", Value_LineThrough },
    { "link", Value_Link },
    { "link-visited", Value_LinkVisited },
    { "lower-alpha", Value_LowerAlpha },
    { "medium", Value_Medium },
    { "mid", Value_Mid },
    { "middle", Value_Middle },
    { "midlight", Value_Midlight },
    { "native", Value_Native },
    { "none", Value_None },
    { "normal", Value_Normal },
    { "nowrap", Value_NoWrap },
    { "oblique", Value_Oblique },
    { "outset", Value_Outset },
    { "overline", Value_Overline },
    { "pre", Value_Pre },
    { "pre-wrap", Value_PreWrap },
    { "ridge", Value_Ridge },
    { "right", Value_Right },
    { "shadow", Value_Shadow },
    { "small" , Value_Small },
    { "solid", Value_Solid },
    { "square", Value_Square },
    { "sub", Value_Sub },
    { "super", Value_Super },
    { "text", Value_Text },
    { "top", Value_Top },
    { "transparent", Value_Transparent },
    { "underline", Value_Underline },
    { "upper-alpha", Value_UpperAlpha },
    { "wave", Value_Wave },
    { "window", Value_Window },
    { "window-text", Value_WindowText },
    { "x-large", Value_XLarge },
    { "xx-large", Value_XXLarge }
};

static const QCssKnownValue pseudos[NumPseudos - 1] = {
    { "adjoins-item", PseudoClass_Item },
    { "bottom", PseudoClass_Bottom },
    { "checked", PseudoClass_Checked },
    { "closed", PseudoClass_Closed },
    { "default", PseudoClass_Default },
    { "disabled", PseudoClass_Disabled },
    { "editable", PseudoClass_Editable },
    { "enabled", PseudoClass_Enabled },
    { "exclusive", PseudoClass_Exclusive },
    { "first", PseudoClass_First },
    { "flat", PseudoClass_Flat },
    { "focus", PseudoClass_Focus },
    { "has-children", PseudoClass_Children },
    { "has-siblings", PseudoClass_Sibling },
    { "horizontal", PseudoClass_Horizontal },
    { "hover", PseudoClass_Hover },
    { "indeterminate" , PseudoClass_Indeterminate },
    { "last", PseudoClass_Last },
    { "left", PseudoClass_Left },
    { "middle", PseudoClass_Middle },
    { "next-selected", PseudoClass_NextSelected },
    { "no-frame", PseudoClass_Frameless },
    { "non-exclusive", PseudoClass_NonExclusive },
    { "off", PseudoClass_Unchecked },
    { "on", PseudoClass_Checked },
    { "only-one", PseudoClass_OnlyOne },
    { "open", PseudoClass_Open },
    { "pressed", PseudoClass_Pressed },
    { "previous-selected", PseudoClass_PreviousSelected },
    { "read-only", PseudoClass_ReadOnly },
    { "right", PseudoClass_Right },
    { "selected", PseudoClass_Selected },
    { "top", PseudoClass_Top },
    { "unchecked" , PseudoClass_Unchecked },
    { "vertical", PseudoClass_Vertical },
};

static const QCssKnownValue origins[NumKnownOrigins - 1] = {
    { "border", Origin_Border },
    { "content", Origin_Content },
    { "margin", Origin_Margin }, // not in css
    { "padding", Origin_Padding }
};

static const QCssKnownValue repeats[NumKnownRepeats - 1] = {
    { "no-repeat", Repeat_None },
    { "repeat-x", Repeat_X },
    { "repeat-xy", Repeat_XY },
    { "repeat-y", Repeat_Y }
};

static const QCssKnownValue tileModes[NumKnownTileModes - 1] = {
    { "repeat", TileMode_Repeat },
    { "round", TileMode_Round },
    { "stretch", TileMode_Stretch },
};

static const QCssKnownValue positions[NumKnownPositionModes - 1] = {
    { "absolute", PositionMode_Absolute },
    { "fixed", PositionMode_Fixed },
    { "relative", PositionMode_Relative },
    { "static", PositionMode_Static }
};

static const QCssKnownValue attachments[NumKnownAttachments - 1] = {
    { "fixed", Attachment_Fixed },
    { "scroll", Attachment_Scroll }
};

static const QCssKnownValue styleFeatures[NumKnownStyleFeatures - 1] = {
    { "background-color", StyleFeature_BackgroundColor },
    { "background-gradient", StyleFeature_BackgroundGradient },
    { "none", StyleFeature_None }
};

static bool operator<(const QString &name, const QCssKnownValue &prop)
{
    return QString::compare(name, QLatin1String(prop.name), Qt::CaseInsensitive) < 0;
}

static bool operator<(const QCssKnownValue &prop, const QString &name)
{
    return QString::compare(QLatin1String(prop.name), name, Qt::CaseInsensitive) < 0;
}

static int findKnownValue(const QString &name, const QCssKnownValue *start, int numValues)
{
    const QCssKnownValue *end = &start[numValues - 1];
    const QCssKnownValue *prop = qBinaryFind(start, end, name);
    if (prop == end)
        return 0;
    return prop->id;
}

///////////////////////////////////////////////////////////////////////////////
// Value Extractor
ValueExtractor::ValueExtractor(const QVector<Declaration> &decls, const QPalette &pal)
: declarations(decls), adjustment(0), fontExtracted(false), pal(pal)
{
}

int ValueExtractor::lengthValue(const Value& v)
{
    QString s = v.variant.toString();
    QRegExp re(QLatin1String("(-?[\\d\\.]*)(px|em|ex)?"), Qt::CaseInsensitive);
    if (re.indexIn(s) == -1)
        return 0;
    QString real = re.cap(1);
    QString unit = re.cap(2);

    bool ok;
    qreal number = real.toDouble(&ok);
    if (!ok)
        return 0;

    QFontMetrics fm(f);
    if (unit.compare(QLatin1String("ex"), Qt::CaseInsensitive) == 0)
        return qRound(fm.xHeight() * number);
    else if (unit.compare(QLatin1String("em"), Qt::CaseInsensitive) == 0)
        return qRound(fm.height() * number);

    return qRound(number);
}

int ValueExtractor::lengthValue(const Declaration &decl)
{
    if (decl.values.count() < 1)
        return 0;
    return lengthValue(decl.values.first());
}

void ValueExtractor::lengthValues(const Declaration &decl, int *m)
{
    int i;
    for (i = 0; i < qMin(decl.values.count(), 4); i++)
        m[i] = lengthValue(decl.values[i]);

    if (i == 0) m[0] = m[1] = m[2] = m[3] = 0;
    else if (i == 1) m[3] = m[2] = m[1] = m[0];
    else if (i == 2) m[2] = m[0], m[3] = m[1];
    else if (i == 3) m[3] = m[1];
}

bool ValueExtractor::extractGeometry(int *w, int *h, int *minw, int *minh, int *maxw, int *maxh)
{
    extractFont();
    bool hit = false;
    for (int i = 0; i < declarations.count(); i++) {
        const Declaration &decl = declarations.at(i);
        switch (decl.propertyId) {
        case Width: *w = lengthValue(decl); break;
        case Height: *h = lengthValue(decl); break;
        case MinimumWidth: *minw = lengthValue(decl); break;
        case MinimumHeight: *minh = lengthValue(decl); break;
        case MaximumWidth: *maxw = lengthValue(decl); break;
        case MaximumHeight: *maxh = lengthValue(decl); break;
        default: continue;
        }
        hit = true;
    }