cssstyleselector.cpp

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void CSSStyleSelector::computeFontSizesFor(QPaintDeviceMetrics* paintDeviceMetrics, int zoomFactor, QValueVector<int>& fontSizes, bool isFixed)
{
#ifdef APPLE_CHANGES
    // We don't want to scale the settings by the dpi.
    const float toPix = 1;
#else
    Q_UNUSED( isFixed );

    // ### get rid of float / double
    float toPix = paintDeviceMetrics->logicalDpiY()/72.;
    if (toPix  < 96./72.) toPix = 96./72.;
#endif // ######### fix isFixed code again.

    fontSizes.resize( MAXFONTSIZES );
    float scale = 1.0;
    static const float fontFactors[] =      {3./5., 3./4., 8./9., 1., 6./5., 3./2., 2., 3.};
    static const float smallFontFactors[] = {3./4., 5./6., 8./9., 1., 6./5., 3./2., 2., 3.};
    float mediumFontSize, minFontSize, factor;
    if (!khtml::printpainter) {
        scale *= zoomFactor / 100.0;
#ifdef APPLE_CHANGES
	if (isFixed)
	    mediumFontSize = settings->mediumFixedFontSize() * toPix;
	else
#endif
	    mediumFontSize = settings->mediumFontSize() * toPix;
        minFontSize = settings->minFontSize() * toPix;
    }
    else {
        // ## depending on something / configurable ?
        mediumFontSize = 12;
        minFontSize = 6;
    }
    const float* factors = scale*mediumFontSize >= 12.5 ? fontFactors : smallFontFactors;
    for ( int i = 0; i < MAXFONTSIZES; i++ ) {
        factor = scale*factors[i];
        fontSizes[i] = int(KMAX( mediumFontSize*factor +.5f, minFontSize));
        //kdDebug( 6080 ) << "index: " << i << " factor: " << factors[i] << " font pix size: " << int(KMAX( mediumFontSize*factor +.5f, minFontSize)) << endl;
    }
}

#undef MAXFONTSIZES

static inline void bubbleSort( CSSOrderedProperty **b, CSSOrderedProperty **e )
{
    while( b < e ) {
	bool swapped = false;
        CSSOrderedProperty **y = e+1;
	CSSOrderedProperty **x = e;
        CSSOrderedProperty **swappedPos = 0;
	do {
	    if ( !((**(--x)) < (**(--y))) ) {
		swapped = true;
                swappedPos = x;
                CSSOrderedProperty *tmp = *y;
                *y = *x;
                *x = tmp;
	    }
	} while( x != b );
	if ( !swapped ) break;
        b = swappedPos + 1;
    }
}

RenderStyle *CSSStyleSelector::styleForElement(ElementImpl *e)
{
    if (!e->getDocument()->haveStylesheetsLoaded() || !e->getDocument()->view()) {
        if (!styleNotYetAvailable) {
            styleNotYetAvailable = new RenderStyle();
            styleNotYetAvailable->setDisplay(NONE);
            styleNotYetAvailable->ref();
        }
        return styleNotYetAvailable;
    }

    // set some variables we will need
    pseudoState = PseudoUnknown;

    element = e;
    parentNode = e->parentNode();
    parentStyle = ( parentNode && parentNode->renderer()) ? parentNode->renderer()->style() : 0;
    view = element->getDocument()->view();
    part = view->part();
    settings = part->settings();
    paintDeviceMetrics = element->getDocument()->paintDeviceMetrics();

    style = new RenderStyle();
    if( parentStyle )
        style->inheritFrom( parentStyle );
    else
	parentStyle = style;

    unsigned int numPropsToApply = 0;
    unsigned int numPseudoProps = 0;

    // try to sort out most style rules as early as possible.
    Q_UINT16 cssTagId = localNamePart(element->id());
    int smatch = 0;
    int schecked = 0;

    for ( unsigned int i = 0; i < selectors_size; i++ ) {
	Q_UINT16 tag = localNamePart(selectors[i]->tag);
	if ( cssTagId == tag || tag == anyLocalName ) {
	    ++schecked;

	    checkSelector( i, e );

	    if ( selectorCache[i].state == Applies ) {
		++smatch;

// 		qDebug("adding property" );
		for ( unsigned int p = 0; p < selectorCache[i].props_size; p += 2 )
		    for ( unsigned int j = 0; j < (unsigned int )selectorCache[i].props[p+1]; ++j ) {
                        if (numPropsToApply >= propsToApplySize ) {
                            propsToApplySize *= 2;
			    propsToApply = (CSSOrderedProperty **)realloc( propsToApply, propsToApplySize*sizeof( CSSOrderedProperty * ) );
			}
			propsToApply[numPropsToApply++] = properties[selectorCache[i].props[p]+j];
		    }
	    } else if ( selectorCache[i].state == AppliesPseudo ) {
		for ( unsigned int p = 0; p < selectorCache[i].props_size; p += 2 )
		    for ( unsigned int j = 0; j < (unsigned int) selectorCache[i].props[p+1]; ++j ) {
                        if (numPseudoProps >= pseudoPropsSize ) {
                            pseudoPropsSize *= 2;
			    pseudoProps = (CSSOrderedProperty **)realloc( pseudoProps, pseudoPropsSize*sizeof( CSSOrderedProperty * ) );
			}
			pseudoProps[numPseudoProps++] = properties[selectorCache[i].props[p]+j];
			properties[selectorCache[i].props[p]+j]->pseudoId = (RenderStyle::PseudoId) selectors[i]->pseudoId;
		    }
	    }
	}
	else
	    selectorCache[i].state = Invalid;

    }

    // inline style declarations, after all others. non css hints
    // count as author rules, and come before all other style sheets, see hack in append()
    numPropsToApply = addInlineDeclarations( e, e->m_styleDecls, numPropsToApply );

//     qDebug( "styleForElement( %s )", e->tagName().string().latin1() );
//     qDebug( "%d selectors, %d checked,  %d match,  %d properties ( of %d )",
// 	    selectors_size, schecked, smatch, numPropsToApply, properties_size );

    bubbleSort( propsToApply, propsToApply+numPropsToApply-1 );
    bubbleSort( pseudoProps, pseudoProps+numPseudoProps-1 );

    // we can't apply style rules without a view() and a part. This
    // tends to happen on delayed destruction of widget Renderobjects
    if ( part ) {
        fontDirty = false;

        if (numPropsToApply ) {
            CSSStyleSelector::style = style;
            for (unsigned int i = 0; i < numPropsToApply; ++i) {
		if ( fontDirty && propsToApply[i]->priority >= (1 << 30) ) {
		    // we are past the font properties, time to update to the
		    // correct font
#ifdef APPLE_CHANGES
		    checkForGenericFamilyChange(style, parentStyle);
#endif
		    CSSStyleSelector::style->htmlFont().update( paintDeviceMetrics );
		    fontDirty = false;
		}
		DOM::CSSProperty *prop = propsToApply[i]->prop;
//		if (prop->m_id == CSS_PROP__KONQ_USER_INPUT) kdDebug(6080) << "El: "<<e->nodeName().string() << " user-input: "<<((CSSPrimitiveValueImpl *)prop->value())->getIdent() << endl;
//		if (prop->m_id == CSS_PROP_TEXT_TRANSFORM) kdDebug(6080) << "El: "<<e->nodeName().string() << endl;
                applyRule( prop->m_id, prop->value() );
	    }
	    if ( fontDirty ) {
#ifdef APPLE_CHANGES
	        checkForGenericFamilyChange(style, parentStyle);
#endif
		CSSStyleSelector::style->htmlFont().update( paintDeviceMetrics );
            }
        }

        // Clean up our style object's display and text decorations (among other fixups).
        adjustRenderStyle(style, e);

        if ( numPseudoProps ) {
	    fontDirty = false;
            //qDebug("%d applying %d pseudo props", e->cssTagId(), pseudoProps->count() );
            for (unsigned int i = 0; i < numPseudoProps; ++i) {
		if ( fontDirty && pseudoProps[i]->priority >= (1 << 30) ) {
		    // we are past the font properties, time to update to the
		    // correct font
		    //We have to do this for all pseudo styles
		    RenderStyle *pseudoStyle = style->pseudoStyle;
		    while ( pseudoStyle ) {
			pseudoStyle->htmlFont().update( paintDeviceMetrics );
			pseudoStyle = pseudoStyle->pseudoStyle;
		    }
		    fontDirty = false;
		}

                RenderStyle *pseudoStyle;
                pseudoStyle = style->getPseudoStyle(pseudoProps[i]->pseudoId);
                if (!pseudoStyle)
                {
                    pseudoStyle = style->addPseudoStyle(pseudoProps[i]->pseudoId);
                    if (pseudoStyle)
                        pseudoStyle->inheritFrom( style );
                }

                RenderStyle* oldStyle = style;
                RenderStyle* oldParentStyle = parentStyle;
                parentStyle = style;
		style = pseudoStyle;
                if ( pseudoStyle ) {
		    DOM::CSSProperty *prop = pseudoProps[i]->prop;
		    applyRule( prop->m_id, prop->value() );
		}
                style = oldStyle;
                parentStyle = oldParentStyle;
            }

	    if ( fontDirty ) {
		RenderStyle *pseudoStyle = style->pseudoStyle;
		while ( pseudoStyle ) {
		    pseudoStyle->htmlFont().update( paintDeviceMetrics );
		    pseudoStyle = pseudoStyle->pseudoStyle;
		}
	    }
        }
    }

    // Now adjust all our pseudo-styles.
    RenderStyle *pseudoStyle = style->pseudoStyle;
    while (pseudoStyle) {
        adjustRenderStyle(pseudoStyle, 0);
        pseudoStyle = pseudoStyle->pseudoStyle;
    }

    // Now return the style.
    return style;
}

void CSSStyleSelector::adjustRenderStyle(RenderStyle* style, DOM::ElementImpl *e)
{
     // Cache our original display.
     style->setOriginalDisplay(style->display());

    if (style->display() != NONE) {
        // If we have a <td> that specifies a float property, in quirks mode we just drop the float
        // property.
        // Sites also commonly use display:inline/block on <td>s and <table>s.  In quirks mode we force
        // these tags to retain their display types.
        if (!strictParsing && e) {
            if (e->id() == ID_TD) {
                style->setDisplay(TABLE_CELL);
                style->setFloating(FNONE);
            }
//             else if (e->id() == ID_TABLE)
//                 style->setDisplay(style->isDisplayInlineType() ? INLINE_TABLE : TABLE);
        }

        // Table headers with a text-align of auto will change the text-align to center.
        if (e && e->id() == ID_TH && style->textAlign() == TAAUTO)
            style->setTextAlign(CENTER);

        // Mutate the display to BLOCK or TABLE for certain cases, e.g., if someone attempts to
        // position or float an inline, compact, or run-in.  Cache the original display, since it
        // may be needed for positioned elements that have to compute their static normal flow
        // positions.  We also force inline-level roots to be block-level.
        if (style->display() != BLOCK && style->display() != TABLE /*&& style->display() != BOX*/ &&
            (style->position() == ABSOLUTE || style->position() == FIXED || style->floating() != FNONE ||
             (e && e->getDocument()->documentElement() == e))) {
             if (style->display() == INLINE_TABLE)
                 style->setDisplay(TABLE);
//             else if (style->display() == INLINE_BOX)
//                 style->setDisplay(BOX);
            else if (style->display() == LIST_ITEM) {
                // It is a WinIE bug that floated list items lose their bullets, so we'll emulate the quirk,
                // but only in quirks mode.
                if (!strictParsing && style->floating() != FNONE)
                    style->setDisplay(BLOCK);
            }
            else
                style->setDisplay(BLOCK);
        }

        // After performing the display mutation, check table rows.  We do not honor position:relative on
        // table rows. This has been established in CSS2.1 (and caused a crash in containingBlock() on
        // some sites).
        // Likewise, disallow relative positioning on table sections.
        if ( style->position() == RELATIVE && (style->display() > INLINE_TABLE && style->display() < TABLE_COLUMN_GROUP) )
            style->setPosition(STATIC);
    }

    // Frames and framesets never honor position:relative or position:absolute.  This is necessary to
    // fix a crash where a site tries to position these objects.
    if ( e ) {
        // ignore display: none for <frame>
        if ( e->id() == ID_FRAME ) {
            style->setPosition( STATIC );
            style->setDisplay( BLOCK );
        }
        else if ( e->id() == ID_FRAMESET ) {
            style->setPosition( STATIC );
        }
    }

    // Finally update our text decorations in effect, but don't allow text-decoration to percolate through
    // tables, inline blocks, inline tables, or run-ins.
    if (style->display() == TABLE || style->display() == INLINE_TABLE || style->display() == RUN_IN
        || style->display() == INLINE_BLOCK /*|| style->display() == INLINE_BOX*/)
        style->setTextDecorationsInEffect(style->textDecoration());
    else
        style->addToTextDecorationsInEffect(style->textDecoration());

    // Cull out any useless layers and also repeat patterns into additional layers.
    style->adjustBackgroundLayers();

    // Only use slow repaints if we actually have a background image.
    // FIXME: We only need to invalidate the fixed regions when scrolling.  It's total overkill to
    // prevent the entire view from blitting on a scroll.
    if (style->hasFixedBackgroundImage() && view)
        view->useSlowRepaints();
}

unsigned int CSSStyleSelector::addInlineDeclarations(DOM::ElementImpl* e,
                                                     DOM::CSSStyleDeclarationImpl *decl,
                                                     unsigned int numProps)
{
    CSSStyleDeclarationImpl* addDecls = 0;
#ifdef APPLE_CHANGES
    if (e->id() == ID_TD || e->id() == ID_TH)     // For now only TableCellElement implements the
        addDecls = e->getAdditionalStyleDecls();  // virtual function for shared cell rules.
#else
    Q_UNUSED( e );
#endif

    if (!decl && !addDecls)
        return numProps;

    QPtrList<CSSProperty>* values = decl ? decl->values() : 0;
    QPtrList<CSSProperty>* addValues = addDecls ? addDecls->values() : 0;
    if (!values && !addValues)
        return numProps;

    int firstLen = values ? values->count() : 0;
    int secondLen = addValues ? addValues->count() : 0;
    int totalLen = firstLen + secondLen;

    if (inlineProps.size() < (uint)totalLen)
        inlineProps.resize(totalLen + 1);

    if (numProps + totalLen >= propsToApplySize ) {
        propsToApplySize += propsToApplySize;
        propsToApply = (CSSOrderedProperty **)realloc( propsToApply, propsToApplySize*sizeof( CSSOrderedProperty * ) );
    }

    CSSOrderedProperty *array = (CSSOrderedProperty *)inlineProps.data();
    for(int i = 0; i < totalLen; i++)
    {
        if (i == firstLen)
            values = addValues;

        CSSProperty *prop = values->at(i >= firstLen ? i - firstLen : i);
	Source source = Inline;

        if( prop->m_bImportant ) source = InlineImportant;
	if( prop->nonCSSHint ) source = NonCSSHint;

	bool first;
        // give special priority to font-xxx, color properties
        switch(prop->m_id)
        {
        case CSS_PROP_FONT_STYLE:
	case CSS_PROP_FONT_SIZE:
	case CSS_PROP_FONT_WEIGHT:
        case CSS_PROP_FONT_FAMILY:
        case CSS_PROP_FONT:
        case CSS_PROP_COLOR: