IntSize SVGImage::size() const
{
IntSize defaultSize(300, 150);
// FIXME: Eventually we'll be passed in the dest size and can scale against that
IntSize destSize = defaultSize;
if (!m_frame || !m_frame->document())
return IntSize();
SVGSVGElement* rootElement = static_cast<SVGDocument*>(m_frame->document())->rootElement();
if (!rootElement)
return defaultSize;
SVGLength width = rootElement->width();
SVGLength height = rootElement->height();
IntSize svgSize;
if (width.unitType() == LengthTypePercentage)
svgSize.setWidth(static_cast<int>(width.valueInSpecifiedUnits() * destSize.width()));
else
svgSize.setWidth(static_cast<int>(width.value()));
if (height.unitType() == LengthTypePercentage)
svgSize.setHeight(static_cast<int>(height.valueInSpecifiedUnits() * destSize.height()));
else
svgSize.setHeight(static_cast<int>(height.value()));
return svgSize;
}
IntSize SVGImage::size() const
{
if (!m_page)
return IntSize();
Frame* frame = m_page->mainFrame();
SVGSVGElement* rootElement = static_cast<SVGDocument*>(frame->document())->rootElement();
if (!rootElement)
return IntSize();
SVGLength width = rootElement->width();
SVGLength height = rootElement->height();
IntSize svgSize;
if (width.unitType() == LengthTypePercentage)
svgSize.setWidth(rootElement->relativeWidthValue());
else
svgSize.setWidth(static_cast<int>(width.value(rootElement)));
if (height.unitType() == LengthTypePercentage)
svgSize.setHeight(rootElement->relativeHeightValue());
else
svgSize.setHeight(static_cast<int>(height.value(rootElement)));
return svgSize;
}
float SVGTextLayoutEngineSpacing::calculateCSSKerningAndSpacing(const SVGRenderStyle* style, SVGElement* contextElement, const UChar* currentCharacter)
{
float kerning = 0;
SVGLength kerningLength = style->kerning();
if (kerningLength.unitType() == LengthTypePercentage)
kerning = kerningLength.valueAsPercentage() * m_font.pixelSize();
else {
SVGLengthContext lengthContext(contextElement);
kerning = kerningLength.value(lengthContext);
}
const UChar* lastCharacter = m_lastCharacter;
m_lastCharacter = currentCharacter;
if (!kerning && !m_font.letterSpacing() && !m_font.wordSpacing())
return 0;
float spacing = m_font.letterSpacing() + kerning;
if (currentCharacter && lastCharacter && m_font.wordSpacing()) {
if (Font::treatAsSpace(*currentCharacter) && !Font::treatAsSpace(*lastCharacter))
spacing += m_font.wordSpacing();
}
return spacing;
}
int SVGSVGElement::relativeHeightValue() const
{
SVGLength h = height();
if (h.unitType() != LengthTypePercentage)
return 0;
return static_cast<int>(h.valueAsPercentage() * m_containerSize.height());
}
int SVGSVGElement::relativeWidthValue() const
{
SVGLength w = width();
if (w.unitType() != LengthTypePercentage)
return 0;
return static_cast<int>(w.valueAsPercentage() * m_containerSize.width());
}
static v8::Handle<v8::Value> unitTypeAttrGetter(v8::Local<v8::String> name, const v8::AccessorInfo& info)
{
INC_STATS("DOM.SVGLength.unitType._get");
V8SVGPODTypeWrapper<SVGLength>* impWrapper = V8SVGPODTypeWrapper<SVGLength>::toNative(info.Holder());
SVGLength impInstance = *impWrapper;
SVGLength* imp = &impInstance;
return v8::Integer::New(imp->unitType());
}
void RenderSVGRoot::calcViewport()
{
SVGSVGElement* svg = static_cast<SVGSVGElement*>(node());
if (!svg->hasSetContainerSize()) {
// In the normal case of <svg> being stand-alone or in a CSSBoxModel object we use
// RenderBox::width()/height() (which pulls data from RenderStyle)
m_viewportSize = FloatSize(width(), height());
return;
}
// In the SVGImage case grab the SVGLength values off of SVGSVGElement and use
// the special relativeWidthValue accessors which respect the specified containerSize
// FIXME: Check how SVGImage + zooming is supposed to be handled?
SVGLength width = svg->width();
SVGLength height = svg->height();
m_viewportSize = FloatSize(width.unitType() == LengthTypePercentage ? svg->relativeWidthValue() : width.value(svg),
height.unitType() == LengthTypePercentage ? svg->relativeHeightValue() : height.value(svg));
}
void RenderSVGRoot::calcViewport()
{
SVGSVGElement* svg = static_cast<SVGSVGElement*>(node());
if (!selfNeedsLayout() && !svg->hasRelativeValues())
return;
if (!svg->hasSetContainerSize()) {
// In the normal case of <svg> being stand-alone or in a CSSBoxModel object we use
// RenderBox::width()/height() (which pulls data from RenderStyle)
m_viewportSize = FloatSize(width(), height());
} else {
// In the SVGImage case grab the SVGLength values off of SVGSVGElement and use
// the special relativeWidthValue accessors which respect the specified containerSize
SVGLength width = svg->width();
SVGLength height = svg->height();
float viewportWidth = (width.unitType() == LengthTypePercentage) ? svg->relativeWidthValue() : width.value(svg);
float viewportHeight = (height.unitType() == LengthTypePercentage) ? svg->relativeHeightValue() : height.value(svg);
m_viewportSize = FloatSize(viewportWidth, viewportHeight);
}
}
PassRefPtr<CSSPrimitiveValue> SVGLength::toCSSPrimitiveValue(const SVGLength& length)
{
CSSPrimitiveValue::UnitTypes cssType = CSSPrimitiveValue::CSS_UNKNOWN;
switch (length.unitType()) {
case LengthTypeUnknown:
break;
case LengthTypeNumber:
cssType = CSSPrimitiveValue::CSS_NUMBER;
break;
case LengthTypePercentage:
cssType = CSSPrimitiveValue::CSS_PERCENTAGE;
break;
case LengthTypeEMS:
cssType = CSSPrimitiveValue::CSS_EMS;
break;
case LengthTypeEXS:
cssType = CSSPrimitiveValue::CSS_EXS;
break;
case LengthTypePX:
cssType = CSSPrimitiveValue::CSS_PX;
break;
case LengthTypeCM:
cssType = CSSPrimitiveValue::CSS_CM;
break;
case LengthTypeMM:
cssType = CSSPrimitiveValue::CSS_MM;
break;
case LengthTypeIN:
cssType = CSSPrimitiveValue::CSS_IN;
break;
case LengthTypePT:
cssType = CSSPrimitiveValue::CSS_PT;
break;
case LengthTypePC:
cssType = CSSPrimitiveValue::CSS_PC;
break;
default:
ASSERT_NOT_REACHED();
};
return CSSPrimitiveValue::create(length.valueInSpecifiedUnits(), cssType);
}
float SVGTextLayoutEngineBaseline::calculateBaselineShift(const SVGRenderStyle* style, SVGElement* lengthContext) const
{
if (style->baselineShift() == BS_LENGTH) {
SVGLength baselineShiftValueLength = style->baselineShiftValue();
if (baselineShiftValueLength.unitType() == LengthTypePercentage)
return baselineShiftValueLength.valueAsPercentage() * m_font.pixelSize();
return baselineShiftValueLength.value(lengthContext);
}
switch (style->baselineShift()) {
case BS_BASELINE:
return 0;
case BS_SUB:
return -m_font.height() / 2;
case BS_SUPER:
return m_font.height() / 2;
default:
ASSERT_NOT_REACHED();
return 0;
}
}
// Helper function
static float calculateBaselineShift(RenderObject* item)
{
ASSERT(item);
ASSERT(item->style());
ASSERT(item->node());
ASSERT(item->node()->isSVGElement());
const Font& font = item->style()->font();
const SVGRenderStyle* svgStyle = item->style()->svgStyle();
float baselineShift = 0.0f;
if (svgStyle->baselineShift() == BS_LENGTH) {
SVGLength baselineShiftValueLength = svgStyle->baselineShiftValue();
if (baselineShiftValueLength.unitType() == LengthTypePercentage)
baselineShift = baselineShiftValueLength.valueAsPercentage() * font.pixelSize();
else
baselineShift = baselineShiftValueLength.value(static_cast<SVGElement*>(item->node()));
} else {
float baselineAscent = font.ascent() + font.descent();
switch (svgStyle->baselineShift()) {
case BS_BASELINE:
break;
case BS_SUB:
baselineShift = -baselineAscent / 2.0f;
break;
case BS_SUPER:
baselineShift = baselineAscent / 2.0f;
break;
default:
ASSERT_NOT_REACHED();
}
}
return baselineShift;
}
