SVGFontFaceElement.cpp [plain text]
#include "config.h"
#if ENABLE(SVG_FONTS)
#include "SVGFontFaceElement.h"
#include "CSSFontFaceSrcValue.h"
#include "CSSParser.h"
#include "CSSPropertyNames.h"
#include "CSSStyleSheet.h"
#include "CSSValueKeywords.h"
#include "CSSValueList.h"
#include "Document.h"
#include "ElementIterator.h"
#include "FontCascade.h"
#include "SVGDocumentExtensions.h"
#include "SVGFontElement.h"
#include "SVGFontFaceSrcElement.h"
#include "SVGGlyphElement.h"
#include "SVGNames.h"
#include "StyleProperties.h"
#include "StyleResolver.h"
#include "StyleRule.h"
#include <math.h>
namespace WebCore {
using namespace SVGNames;
inline SVGFontFaceElement::SVGFontFaceElement(const QualifiedName& tagName, Document& document)
: SVGElement(tagName, document)
, m_fontFaceRule(StyleRuleFontFace::create(MutableStyleProperties::create(CSSStrictMode)))
, m_fontElement(nullptr)
{
ASSERT(hasTagName(font_faceTag));
}
Ref<SVGFontFaceElement> SVGFontFaceElement::create(const QualifiedName& tagName, Document& document)
{
return adoptRef(*new SVGFontFaceElement(tagName, document));
}
void SVGFontFaceElement::parseAttribute(const QualifiedName& name, const AtomicString& value)
{
CSSPropertyID propId = cssPropertyIdForSVGAttributeName(name);
if (propId > 0) {
m_fontFaceRule->mutableProperties().setProperty(propId, value, false);
rebuildFontFace();
return;
}
SVGElement::parseAttribute(name, value);
}
unsigned SVGFontFaceElement::unitsPerEm() const
{
const AtomicString& value = fastGetAttribute(units_per_emAttr);
if (value.isEmpty())
return gDefaultUnitsPerEm;
return static_cast<unsigned>(ceilf(value.toFloat()));
}
int SVGFontFaceElement::xHeight() const
{
return static_cast<int>(ceilf(fastGetAttribute(x_heightAttr).toFloat()));
}
int SVGFontFaceElement::capHeight() const
{
return static_cast<int>(ceilf(fastGetAttribute(cap_heightAttr).toFloat()));
}
float SVGFontFaceElement::horizontalOriginX() const
{
if (!m_fontElement)
return 0.0f;
return m_fontElement->fastGetAttribute(horiz_origin_xAttr).toFloat();
}
float SVGFontFaceElement::horizontalOriginY() const
{
if (!m_fontElement)
return 0.0f;
return m_fontElement->fastGetAttribute(horiz_origin_yAttr).toFloat();
}
float SVGFontFaceElement::horizontalAdvanceX() const
{
if (!m_fontElement)
return 0.0f;
return m_fontElement->fastGetAttribute(horiz_adv_xAttr).toFloat();
}
float SVGFontFaceElement::verticalOriginX() const
{
if (!m_fontElement)
return 0.0f;
const AtomicString& value = m_fontElement->fastGetAttribute(vert_origin_xAttr);
if (value.isEmpty())
return horizontalAdvanceX() / 2.0f;
return value.toFloat();
}
float SVGFontFaceElement::verticalOriginY() const
{
if (!m_fontElement)
return 0.0f;
const AtomicString& value = m_fontElement->fastGetAttribute(vert_origin_yAttr);
if (value.isEmpty())
return ascent();
return value.toFloat();
}
float SVGFontFaceElement::verticalAdvanceY() const
{
if (!m_fontElement)
return 0.0f;
const AtomicString& value = m_fontElement->fastGetAttribute(vert_adv_yAttr);
if (value.isEmpty())
return 1.0f;
return value.toFloat();
}
int SVGFontFaceElement::ascent() const
{
const AtomicString& ascentValue = fastGetAttribute(ascentAttr);
if (!ascentValue.isEmpty())
return static_cast<int>(ceilf(ascentValue.toFloat()));
if (m_fontElement) {
const AtomicString& vertOriginY = m_fontElement->fastGetAttribute(vert_origin_yAttr);
if (!vertOriginY.isEmpty())
return static_cast<int>(unitsPerEm()) - static_cast<int>(ceilf(vertOriginY.toFloat()));
}
return static_cast<int>(ceilf(unitsPerEm() * 0.8f));
}
int SVGFontFaceElement::descent() const
{
const AtomicString& descentValue = fastGetAttribute(descentAttr);
if (!descentValue.isEmpty()) {
int descent = static_cast<int>(ceilf(descentValue.toFloat()));
return descent < 0 ? -descent : descent;
}
if (m_fontElement) {
const AtomicString& vertOriginY = m_fontElement->fastGetAttribute(vert_origin_yAttr);
if (!vertOriginY.isEmpty())
return static_cast<int>(ceilf(vertOriginY.toFloat()));
}
return static_cast<int>(ceilf(unitsPerEm() * 0.2f));
}
String SVGFontFaceElement::fontFamily() const
{
return m_fontFaceRule->properties().getPropertyValue(CSSPropertyFontFamily);
}
SVGFontElement* SVGFontFaceElement::associatedFontElement() const
{
ASSERT(parentNode() == m_fontElement);
ASSERT(!parentNode() || is<SVGFontElement>(*parentNode()));
return m_fontElement;
}
void SVGFontFaceElement::rebuildFontFace()
{
if (!inDocument()) {
ASSERT(!m_fontElement);
return;
}
auto srcElement = childrenOfType<SVGFontFaceSrcElement>(*this).first();
bool describesParentFont = is<SVGFontElement>(*parentNode());
RefPtr<CSSValueList> list;
if (describesParentFont) {
m_fontElement = downcast<SVGFontElement>(parentNode());
list = CSSValueList::createCommaSeparated();
list->append(CSSFontFaceSrcValue::createLocal(fontFamily()));
} else {
m_fontElement = nullptr;
if (srcElement)
list = srcElement->srcValue();
}
if (!list || !list->length())
return;
m_fontFaceRule->mutableProperties().addParsedProperty(CSSProperty(CSSPropertySrc, list));
if (describesParentFont) {
RefPtr<CSSValue> src = m_fontFaceRule->properties().getPropertyCSSValue(CSSPropertySrc);
CSSValueList* srcList = downcast<CSSValueList>(src.get());
unsigned srcLength = srcList ? srcList->length() : 0;
for (unsigned i = 0; i < srcLength; ++i) {
if (CSSFontFaceSrcValue* item = downcast<CSSFontFaceSrcValue>(srcList->itemWithoutBoundsCheck(i)))
item->setSVGFontFaceElement(this);
}
}
document().styleResolverChanged(DeferRecalcStyle);
}
Node::InsertionNotificationRequest SVGFontFaceElement::insertedInto(ContainerNode& rootParent)
{
SVGElement::insertedInto(rootParent);
if (!rootParent.inDocument()) {
ASSERT(!m_fontElement);
return InsertionDone;
}
document().accessSVGExtensions().registerSVGFontFaceElement(this);
rebuildFontFace();
return InsertionDone;
}
void SVGFontFaceElement::removedFrom(ContainerNode& rootParent)
{
SVGElement::removedFrom(rootParent);
if (rootParent.inDocument()) {
m_fontElement = nullptr;
document().accessSVGExtensions().unregisterSVGFontFaceElement(this);
m_fontFaceRule->mutableProperties().clear();
document().styleResolverChanged(DeferRecalcStyle);
} else
ASSERT(!m_fontElement);
}
void SVGFontFaceElement::childrenChanged(const ChildChange& change)
{
SVGElement::childrenChanged(change);
rebuildFontFace();
}
}
#endif // ENABLE(SVG_FONTS)