css_valueimpl.cpp

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}

DOMString CSSMutableStyleDeclarationImpl::item( unsigned long /*index*/ ) const
{
    // ###
    //return m_lstValues->at(index);
    return DOMString();
}

CSSRuleImpl *CSSStyleDeclarationImpl::parentRule() const
{
    return (m_parent && m_parent->isRule() ) ?
	static_cast<CSSRuleImpl *>(m_parent) : 0;
}

DOM::DOMString CSSMutableStyleDeclarationImpl::cssText() const
{
    DOMString result = "";
    
    QValueListConstIterator<CSSProperty> end;
    for (QValueListConstIterator<CSSProperty> it = m_values.begin(); it != end; ++it)
        result += (*it).cssText();

    return result;
}

void CSSMutableStyleDeclarationImpl::setCssText(const DOM::DOMString& text, int &exceptionCode)
{
    exceptionCode = 0;
    m_values.clear();
    CSSParser parser(strictParsing);
    parser.parseDeclaration(this, text);
    // FIXME: Detect syntax errors and set exceptionCode.
    setChanged();
}

void CSSMutableStyleDeclarationImpl::merge(CSSMutableStyleDeclarationImpl *other, bool argOverridesOnConflict)
{
    QValueListConstIterator<CSSProperty> end;
    for (QValueListConstIterator<CSSProperty> it = other->valuesIterator(); it != end; ++it) {
        const CSSProperty &property = *it;
        CSSValueImpl *value = getPropertyCSSValue(property.id());
        if (value) {
            value->ref();
            value->deref();
            if (!argOverridesOnConflict)
                continue;
            removeProperty(property.id());
        }
        m_values.append(property);
    }
    // FIXME: This probably should have a call to setChanged() if something changed. We may also wish to add
    // a notifyChanged argument to this function to follow the model of other functions in this class.
}

void CSSStyleDeclarationImpl::diff(CSSMutableStyleDeclarationImpl *style) const
{
    if (!style)
        return;

    QValueList<int> properties;
    QValueListConstIterator<CSSProperty> end;
    for (QValueListConstIterator<CSSProperty> it(style->valuesIterator()); it != end; ++it) {
        const CSSProperty &property = *it;
        CSSValueImpl *value = getPropertyCSSValue(property.id());
        if (value) {
            value->ref();
            if (value->cssText() == property.value()->cssText()) {
                properties.append(property.id());
            }
            value->deref();
        }
    }
    
    for (QValueListIterator<int> it(properties.begin()); it != properties.end(); ++it)
        style->removeProperty(*it);
}

// This is the list of properties we want to copy in the copyInheritableProperties() function.
// It is the intersection of the list of inherited CSS properties and the
// properties for which we have a computed implementation in this file.
const int inheritableProperties[] = {
    CSS_PROP_BORDER_COLLAPSE,
    CSS_PROP_BORDER_SPACING,
    CSS_PROP_COLOR,
    CSS_PROP_FONT_FAMILY,
    CSS_PROP_FONT_SIZE,
    CSS_PROP_FONT_STYLE,
    CSS_PROP_FONT_VARIANT,
    CSS_PROP_FONT_WEIGHT,
    CSS_PROP_LETTER_SPACING,
    CSS_PROP_LINE_HEIGHT,
    CSS_PROP_TEXT_ALIGN,
    CSS_PROP__KHTML_TEXT_DECORATIONS_IN_EFFECT,
    CSS_PROP_TEXT_INDENT,
    CSS_PROP__APPLE_TEXT_SIZE_ADJUST,
    CSS_PROP_TEXT_TRANSFORM,
    CSS_PROP_ORPHANS,
    CSS_PROP_WHITE_SPACE,
    CSS_PROP_WIDOWS,
    CSS_PROP_WORD_SPACING,
};

const unsigned numInheritableProperties = sizeof(inheritableProperties) / sizeof(inheritableProperties[0]);

// This is the list of properties we want to copy in the copyBlockProperties() function.
// It is the list of CSS properties that apply to specially to block-level elements.
static const int blockProperties[] = {
    CSS_PROP_ORPHANS,
    CSS_PROP_OVERFLOW, // This can be also be applied to replaced elements
    CSS_PROP_PAGE_BREAK_AFTER,
    CSS_PROP_PAGE_BREAK_BEFORE,
    CSS_PROP_PAGE_BREAK_INSIDE,
    CSS_PROP_TEXT_ALIGN,
    CSS_PROP_TEXT_INDENT,
    CSS_PROP_WIDOWS
};

const unsigned numBlockProperties = sizeof(blockProperties) / sizeof(blockProperties[0]);

CSSMutableStyleDeclarationImpl *CSSMutableStyleDeclarationImpl::copyBlockProperties() const
{
    return copyPropertiesInSet(blockProperties, numBlockProperties);
}

void CSSMutableStyleDeclarationImpl::removeBlockProperties()
{
    removePropertiesInSet(blockProperties, numBlockProperties);
}

void CSSMutableStyleDeclarationImpl::removeInheritableProperties()
{
    removePropertiesInSet(inheritableProperties, numInheritableProperties);
}

CSSMutableStyleDeclarationImpl *CSSStyleDeclarationImpl::copyPropertiesInSet(const int *set, unsigned length) const
{
    QValueList<CSSProperty> list;
    for (unsigned i = 0; i < length; i++) {
        CSSValueImpl *value = getPropertyCSSValue(set[i]);
        if (value)
            list.append(CSSProperty(set[i], value, false));
    }
    return new CSSMutableStyleDeclarationImpl(0, list);
}

void CSSMutableStyleDeclarationImpl::removePropertiesInSet(const int *set, unsigned length)
{
    bool changed = false;
    for (unsigned i = 0; i < length; i++) {
        CSSValueImpl *value = getPropertyCSSValue(set[i]);
        if (value) {
            m_values.remove(CSSProperty(set[i], value, false));
            changed = true;
        }
    }
    if (changed)
        setChanged();
}

CSSMutableStyleDeclarationImpl *CSSMutableStyleDeclarationImpl::makeMutable()
{
    return this;
}

CSSMutableStyleDeclarationImpl *CSSMutableStyleDeclarationImpl::copy() const
{
    return new CSSMutableStyleDeclarationImpl(0, m_values);
}

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

unsigned short CSSInheritedValueImpl::cssValueType() const
{
    return CSSValue::CSS_INHERIT;
}

DOM::DOMString CSSInheritedValueImpl::cssText() const
{
    return DOMString("inherit");
}

unsigned short CSSInitialValueImpl::cssValueType() const
{ 
    return CSSValue::CSS_INITIAL; 
}

DOM::DOMString CSSInitialValueImpl::cssText() const
{
    return DOMString("initial");
}

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

CSSValueListImpl::CSSValueListImpl()
{
}

CSSValueListImpl::~CSSValueListImpl()
{
    CSSValueImpl *val = m_values.first();
    while( val ) {
	val->deref();
	val = m_values.next();
    }
}

unsigned short CSSValueListImpl::cssValueType() const
{
    return CSSValue::CSS_VALUE_LIST;
}

void CSSValueListImpl::append(CSSValueImpl *val)
{
    m_values.append(val);
    val->ref();
}

DOM::DOMString CSSValueListImpl::cssText() const
{
    DOMString result = "";

    for (QPtrListIterator<CSSValueImpl> iterator(m_values); iterator.current(); ++iterator) {
	if (result.length() != 0) {
	    result += ", ";
	}
	result += iterator.current()->cssText();
    }
    
    return result;
}

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

CSSPrimitiveValueImpl::CSSPrimitiveValueImpl()
    : CSSValueImpl()
{
    m_type = 0;
}

CSSPrimitiveValueImpl::CSSPrimitiveValueImpl(int ident)
    : CSSValueImpl()
{
    m_value.ident = ident;
    m_type = CSSPrimitiveValue::CSS_IDENT;
}

CSSPrimitiveValueImpl::CSSPrimitiveValueImpl(double num, CSSPrimitiveValue::UnitTypes type)
{
    m_value.num = num;
    m_type = type;
}

CSSPrimitiveValueImpl::CSSPrimitiveValueImpl(const DOMString &str, CSSPrimitiveValue::UnitTypes type)
{
    m_value.string = str.implementation();
    if(m_value.string) m_value.string->ref();
    m_type = type;
}

CSSPrimitiveValueImpl::CSSPrimitiveValueImpl(const Counter &c)
{
    m_value.counter = c.handle();
    if (m_value.counter)
	m_value.counter->ref();
    m_type = CSSPrimitiveValue::CSS_COUNTER;
}

CSSPrimitiveValueImpl::CSSPrimitiveValueImpl( RectImpl *r)
{
    m_value.rect = r;
    if (m_value.rect)
	m_value.rect->ref();
    m_type = CSSPrimitiveValue::CSS_RECT;
}

CSSPrimitiveValueImpl::CSSPrimitiveValueImpl( DashboardRegionImpl *r)
{
    m_value.region = r;
    if (m_value.region)
	m_value.region->ref();
    m_type = CSSPrimitiveValue::CSS_DASHBOARD_REGION;
}

CSSPrimitiveValueImpl::CSSPrimitiveValueImpl(QRgb color)
{
    m_value.rgbcolor = color;
    m_type = CSSPrimitiveValue::CSS_RGBCOLOR;
}

CSSPrimitiveValueImpl::~CSSPrimitiveValueImpl()
{
    cleanup();
}

void CSSPrimitiveValueImpl::cleanup()
{
    switch(m_type) {
    case CSSPrimitiveValue::CSS_STRING:
    case CSSPrimitiveValue::CSS_URI:
    case CSSPrimitiveValue::CSS_ATTR:
        if(m_value.string) m_value.string->deref();
        break;
    case CSSPrimitiveValue::CSS_COUNTER:
        m_value.counter->deref();
        break;
    case CSSPrimitiveValue::CSS_RECT:
        m_value.rect->deref();
        break;
    case CSSPrimitiveValue::CSS_DASHBOARD_REGION:
        if (m_value.region)
            m_value.region->deref();
        break;
    default:
        break;
    }

    m_type = 0;
}

int CSSPrimitiveValueImpl::computeLength( khtml::RenderStyle *style, QPaintDeviceMetrics *devMetrics )
{
    double result = computeLengthFloat( style, devMetrics );
#if APPLE_CHANGES
    // This conversion is imprecise, often resulting in values of, e.g., 44.99998.  We
    // need to go ahead and round if we're really close to the next integer value.
    int intResult = (int)(result + (result < 0 ? -0.01 : +0.01));
#else
    int intResult = (int)result;
#endif
    return intResult;    
}

int CSSPrimitiveValueImpl::computeLength( khtml::RenderStyle *style, QPaintDeviceMetrics *devMetrics, 
                                          double multiplier )
{
    double result = multiplier * computeLengthFloat( style, devMetrics );
#if APPLE_CHANGES
    // This conversion is imprecise, often resulting in values of, e.g., 44.99998.  We
    // need to go ahead and round if we're really close to the next integer value.
    int intResult = (int)(result + (result < 0 ? -0.01 : +0.01));
#else
    int intResult = (int)result;
#endif
    return intResult;    
}

double CSSPrimitiveValueImpl::computeLengthFloat( khtml::RenderStyle *style, QPaintDeviceMetrics *devMetrics,
                                                  bool applyZoomFactor )
{
    unsigned short type = primitiveType();

    double dpiY = 72.; // fallback
    if ( devMetrics )
        dpiY = devMetrics->logicalDpiY();
    if ( !khtml::printpainter && dpiY < 96 )
        dpiY = 96.;

    double factor = 1.;
    switch(type)
    {
    case CSSPrimitiveValue::CSS_EMS:
        factor = applyZoomFactor ?
          style->htmlFont().getFontDef().computedSize :
          style->htmlFont().getFontDef().specifiedSize;
        break;
    case CSSPrimitiveValue::CSS_EXS:
        // FIXME: We have a bug right now where the zoom will be applied multiple times to EX units.
        // We really need to compute EX using fontMetrics for the original specifiedSize and not use
        // our actual constructed rendering font.
	{
        QFontMetrics fm = style->fontMetrics();
#if APPLE_CHANGES
        factor = fm.xHeight();
#else
        QRect b = fm.boundingRect('x');
        factor = b.height();
#endif
        break;
	}
    case CSSPrimitiveValue::CSS_PX:
        break;
    case CSSPrimitiveValue::CSS_CM:
	factor = dpiY/2.54; //72dpi/(2.54 cm/in)
        break;
    case CSSPrimitiveValue::CSS_MM:
	factor = dpiY/25.4;
        break;
    case CSSPrimitiveValue::CSS_IN:
            factor = dpiY;
        break;
    case CSSPrimitiveValue::CSS_PT:
            factor = dpiY/72.;
        break;
    case CSSPrimitiveValue::CSS_PC:
        // 1 pc == 12 pt
            factor = dpiY*12./72.;
        break;
    default:
        return -1;
    }

    return getFloatValue(type)*factor;
}

void CSSPrimitiveValueImpl::setFloatValue( unsigned short unitType, double floatValue, int &exceptioncode )
{
    exceptioncode = 0;
    cleanup();
    // ### check if property supports this type
    if(m_type > CSSPrimitiveValue::CSS_DIMENSION) {
	exceptioncode = CSSException::SYNTAX_ERR + CSSException::_EXCEPTION_OFFSET;
	return;
    }
    //if(m_type > CSSPrimitiveValue::CSS_DIMENSION) throw DOMException(DOMException::INVALID_ACCESS_ERR);
    m_value.num = floatValue;
    m_type = unitType;
}

void CSSPrimitiveValueImpl::setStringValue( unsigned short stringType, const DOMString &stringValue, int &exceptioncode )
{
    exceptioncode = 0;
    cleanup();
    //if(m_type < CSSPrimitiveValue::CSS_STRING) throw DOMException(DOMException::INVALID_ACCESS_ERR);
    //if(m_type > CSSPrimitiveValue::CSS_ATTR) throw DOMException(DOMException::INVALID_ACCESS_ERR);
    if(m_type < CSSPrimitiveValue::CSS_STRING || m_type >> CSSPrimitiveValue::CSS_ATTR) {
	exceptioncode = CSSException::SYNTAX_ERR + CSSException::_EXCEPTION_OFFSET;
	return;
    }
    if(stringType != CSSPrimitiveValue::CSS_IDENT)
    {
	m_value.string = stringValue.implementation();
	m_value.string->ref();
	m_type = stringType;
    }
    // ### parse ident
}

DOMString CSSPrimitiveValueImpl::getStringValue() const
{
    switch (m_type) {