cssstyleselector.cpp

khtml在gtk上的移植版本

        else if (sel->match == CSSSelector::Id)
            return e->hasID() && e->getIDAttribute() == sel->value;
        else if (style && (e != element || !htmlElement || !htmlElement->isMappedAttribute(sel->attr)))
            style->setAffectedByAttributeSelectors();

        const AtomicString& value = e->getAttribute(sel->attr);
        if (value.isNull()) return false; // attribute is not set

        switch(sel->match) {
        case CSSSelector::Exact:
	    if ((isXMLDoc && sel->value != value) ||
                (!isXMLDoc && !equalsIgnoreCase(sel->value, value)))
                return false;
            break;
        case CSSSelector::List:
        {
            int spacePos = value.find(' ', 0);
            if (spacePos == -1) {
                // There is no list, just a single item.  We can avoid
                // allocing QStrings and just treat this as an exact
                // match check.
                if ((isXMLDoc && sel->value != value) ||
                    (!isXMLDoc && !equalsIgnoreCase(sel->value, value)))
                    return false;
                break;
            }

            // The selector's value can't contain a space, or it's totally bogus.
            spacePos = sel->value.find(' ');
            if (spacePos != -1)
                return false;

            QString str = value.string();
            QString selStr = sel->value.string();
            int startSearchAt = 0;
            while (true) {
                int foundPos = str.find(selStr, startSearchAt, isXMLDoc);
                if (foundPos == -1) return false;
                if (foundPos == 0 || str[foundPos-1] == ' ') {
                    uint endStr = foundPos + selStr.length();
                    if (endStr == str.length() || str[endStr] == ' ')
                        break; // We found a match.
                }
                
                // No match.  Keep looking.
                startSearchAt = foundPos + 1;
            }

            break;
        }
        case CSSSelector::Contain:
        {
            //kdDebug( 6080 ) << "checking for contains match" << endl;
            QString str = value.string();
            QString selStr = sel->value.string();
            int pos = str.find(selStr, 0, isXMLDoc);
            if(pos == -1) return false;
            break;
        }
        case CSSSelector::Begin:
        {
            //kdDebug( 6080 ) << "checking for beginswith match" << endl;
            QString str = value.string();
            QString selStr = sel->value.string();
            int pos = str.find(selStr, 0, isXMLDoc);
            if(pos != 0) return false;
            break;
        }
        case CSSSelector::End:
        {
            //kdDebug( 6080 ) << "checking for endswith match" << endl;
            QString str = value.string();
            QString selStr = sel->value.string();
	    if (isXMLDoc && !str.endsWith(selStr)) return false;
	    if (!isXMLDoc) {
	        int pos = str.length() - selStr.length();
		if (pos < 0 || pos != str.find(selStr, pos, false) )
		    return false;
	    }
            break;
        }
        case CSSSelector::Hyphen:
        {
            //kdDebug( 6080 ) << "checking for hyphen match" << endl;
            QString str = value.string();
            QString selStr = sel->value.string();
            if(str.length() < selStr.length()) return false;
            // Check if str begins with selStr:
            if(str.find(selStr, 0, isXMLDoc) != 0) return false;
            // It does. Check for exact match or following '-':
            if(str.length() != selStr.length()
                && str[selStr.length()] != '-') return false;
            break;
        }
        default:
            break;
        }
    }
    if(sel->match == CSSSelector::Pseudo)
    {
        // Pseudo elements. We need to check first child here. No dynamic pseudo
        // elements for the moment
//	kdDebug() << "CSSOrderedRule::pseudo " << value << endl;
	switch (sel->pseudoType()) {
            case CSSSelector::PseudoEmpty:
                if (!e->firstChild())
                    return true;
                break;
            case CSSSelector::PseudoFirstChild: {
                // first-child matches the first child that is an element!
                if (e->parentNode()) {
                    DOM::NodeImpl* n = e->previousSibling();
                    while ( n && !n->isElementNode() )
                        n = n->previousSibling();
                    if ( !n )
                        return true;
                }
                break;
            }
            case CSSSelector::PseudoLastChild: {
                // last-child matches the last child that is an element!
                if (e->parentNode()) {
                    DOM::NodeImpl* n = e->nextSibling();
                    while ( n && !n->isElementNode() )
                        n = n->nextSibling();
                    if ( !n )
                        return true;
                }
                break;
            }
            case CSSSelector::PseudoOnlyChild: {
                // If both first-child and last-child apply, then only-child applies.
                if (e->parentNode()) {
                    DOM::NodeImpl* n = e->previousSibling();
                    while ( n && !n->isElementNode() )
                        n = n->previousSibling();
                    if ( !n ) {
                        n = e->nextSibling();
                        while ( n && !n->isElementNode() )
                            n = n->nextSibling();
                        if ( !n )
                            return true;
                    }
                }
                break;
            }
            case CSSSelector::PseudoFirstLine:
                if ( subject ) {
                    dynamicPseudo=RenderStyle::FIRST_LINE;
                    return true;
                }
                break;
            case CSSSelector::PseudoFirstLetter:
                if ( subject ) {
                    dynamicPseudo=RenderStyle::FIRST_LETTER;
                    return true;
                }
                break;
            case CSSSelector::PseudoTarget:
                if (e == e->getDocument()->getCSSTarget())
                    return true;
                break;
            case CSSSelector::PseudoAnyLink:
                if (pseudoState == PseudoUnknown)
                    checkPseudoState(e, false);
                if (pseudoState == PseudoAnyLink || pseudoState == PseudoLink || pseudoState == PseudoVisited)
                    return true;
                break;
            case CSSSelector::PseudoLink:
                if ( pseudoState == PseudoUnknown || pseudoState == PseudoAnyLink )
                    checkPseudoState( e );
                if ( pseudoState == PseudoLink )
                    return true;
                break;
            case CSSSelector::PseudoVisited:
                if ( pseudoState == PseudoUnknown || pseudoState == PseudoAnyLink )
                    checkPseudoState( e );
                if ( pseudoState == PseudoVisited )
                    return true;
                break;
            case CSSSelector::PseudoHover: {
                // If we're in quirks mode, then hover should never match anchors with no
                // href.  This is important for sites like wsj.com.
                if (strictParsing || e->id() != ID_A || e->hasAnchor()) {
                    if (element == e && style)
                        style->setAffectedByHoverRules(true);
                    if (e->renderer()) {
                        if (element != e)
                            e->renderer()->style()->setAffectedByHoverRules(true);
                        if (e->renderer()->mouseInside())
                            return true;
                    }
                }
                break;
            }
            case CSSSelector::PseudoDrag: {
                if (element == e && style)
                    style->setAffectedByDragRules(true);
                if (e->renderer()) {
                    if (element != e)
                        e->renderer()->style()->setAffectedByDragRules(true);
                    if (e->renderer()->isDragging())
                        return true;
                }
                break;
            }
            case CSSSelector::PseudoFocus:
                if (e && e->focused()) {
                    return true;
                }
                break;
            case CSSSelector::PseudoActive:
                // If we're in quirks mode, then :active should never match anchors with no
                // href. 
                if (strictParsing || e->id() != ID_A || e->hasAnchor()) {
                    if (element == e && style)
                        style->setAffectedByActiveRules(true);
                    else if (e->renderer())
                        e->renderer()->style()->setAffectedByActiveRules(true);
                    if (e->active())
                        return true;
                }
                break;
            case CSSSelector::PseudoRoot:
                if (e == e->getDocument()->documentElement())
                    return true;
                break;
            case CSSSelector::PseudoNot: {
                // check the simple selector
                for (CSSSelector* subSel = sel->simpleSelector; subSel;
                     subSel = subSel->tagHistory) {
                    // :not cannot nest.  I don't really know why this is a restriction in CSS3,
                    // but it is, so let's honor it.
                    if (subSel->simpleSelector)
                        break;
                    if (!checkOneSelector(subSel, e))
                        return true;
                }
                break;
            }
            case CSSSelector::PseudoSelection:
                dynamicPseudo = RenderStyle::SELECTION;
                return true;
            case CSSSelector::PseudoBefore:
                dynamicPseudo = RenderStyle::BEFORE;
                return true;
            case CSSSelector::PseudoAfter:
                dynamicPseudo = RenderStyle::AFTER;
                return true;
                
            case CSSSelector::PseudoNotParsed:
                assert(false);
                break;
            case CSSSelector::PseudoLang:
                /* not supported for now */
            case CSSSelector::PseudoOther:
                break;
        }
	return false;
    }
    // ### add the rest of the checks...
    return true;
}

// -----------------------------------------------------------------

CSSRuleSet::CSSRuleSet()
{
    m_idRules.setAutoDelete(true);
    m_classRules.setAutoDelete(true);
    m_tagRules.setAutoDelete(true);
    m_universalRules = 0;
    m_ruleCount = 0;
}

void CSSRuleSet::addToRuleSet(void* hash, QPtrDict<CSSRuleDataList>& dict,
                              CSSStyleRuleImpl* rule, CSSSelector* sel)
{
    if (!hash) return;
    CSSRuleDataList* rules = dict.find(hash);
    if (!rules) {
        rules = new CSSRuleDataList(m_ruleCount++, rule, sel);
        dict.insert(hash, rules);
    }
    else
        rules->append(m_ruleCount++, rule, sel);
}

void CSSRuleSet::addRule(CSSStyleRuleImpl* rule, CSSSelector* sel)
{
    if (sel->match == CSSSelector::Id) {
        addToRuleSet(sel->value.implementation(), m_idRules, rule, sel);
        return;
    }
    if (sel->match == CSSSelector::Class) {
        addToRuleSet(sel->value.implementation(), m_classRules, rule, sel);
        return;
    }
     
    Q_UINT16 localName = localNamePart(sel->tag);
    if (localName != anyLocalName) {
        addToRuleSet((void*)(int)localName, m_tagRules, rule, sel);
        return;
    }
    
    // Just put it in the universal rule set.
    if (!m_universalRules)
        m_universalRules = new CSSRuleDataList(m_ruleCount++, rule, sel);
    else
        m_universalRules->append(m_ruleCount++, rule, sel);
}

void CSSRuleSet::addRulesFromSheet(CSSStyleSheetImpl *sheet, const DOMString &medium)
{
    if (!sheet || !sheet->isCSSStyleSheet()) return;

    // No media implies "all", but if a media list exists it must
    // contain our current medium
    if (sheet->media() && !sheet->media()->contains(medium))
        return; // the style sheet doesn't apply

    int len = sheet->length();

    for (int i = 0; i < len; i++) {
        StyleBaseImpl *item = sheet->item(i);
        if (item->isStyleRule()) {
            CSSStyleRuleImpl* rule = static_cast<CSSStyleRuleImpl*>(item);
            for (CSSSelector* s = rule->selector(); s; s = s->next())
                addRule(rule, s);
        }
        else if(item->isImportRule()) {
            CSSImportRuleImpl *import = static_cast<CSSImportRuleImpl *>(item);

            //kdDebug( 6080 ) << "@import: Media: "
            //                << import->media()->mediaText().string() << endl;

            if (!import->media() || import->media()->contains(medium))
                addRulesFromSheet(import->styleSheet(), medium);
        }
        else if(item->isMediaRule()) {
            CSSMediaRuleImpl *r = static_cast<CSSMediaRuleImpl*>(item);
            CSSRuleListImpl *rules = r->cssRules();

            //DOMString mediaText = media->mediaText();
            //kdDebug( 6080 ) << "@media: Media: "
            //                << r->media()->mediaText().string() << endl;

            if ((!r->media() || r->media()->contains(medium)) && rules) {
                // Traverse child elements of the @media rule.
                for (unsigned j = 0; j < rules->length(); j++) {