SVGFontFaceElement.cpp [plain text]
#include "config.h"
#if ENABLE(SVG_FONTS)
#include "SVGFontFaceElement.h"
#include "Attribute.h"
#include "CSSFontFaceSrcValue.h"
#include "CSSParser.h"
#include "CSSPropertyNames.h"
#include "CSSStyleSheet.h"
#include "CSSValueKeywords.h"
#include "CSSValueList.h"
#include "Document.h"
#include "Font.h"
#include "SVGDocumentExtensions.h"
#include "SVGFontElement.h"
#include "SVGFontFaceSrcElement.h"
#include "SVGGlyphElement.h"
#include "SVGNames.h"
#include "StylePropertySet.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())
, m_fontElement(0)
{
ASSERT(hasTagName(font_faceTag));
RefPtr<MutableStylePropertySet> styleDeclaration = MutableStylePropertySet::create(CSSStrictMode);
m_fontFaceRule->setProperties(styleDeclaration.release());
}
PassRefPtr<SVGFontFaceElement> SVGFontFaceElement::create(const QualifiedName& tagName, Document* document)
{
return adoptRef(new SVGFontFaceElement(tagName, document));
}
static CSSPropertyID cssPropertyIdForSVGAttributeName(const QualifiedName& attrName)
{
if (!attrName.namespaceURI().isNull())
return CSSPropertyInvalid;
static HashMap<AtomicStringImpl*, CSSPropertyID>* propertyNameToIdMap = 0;
if (!propertyNameToIdMap) {
propertyNameToIdMap = new HashMap<AtomicStringImpl*, CSSPropertyID>;
mapAttributeToCSSProperty(propertyNameToIdMap, font_familyAttr);
mapAttributeToCSSProperty(propertyNameToIdMap, font_sizeAttr);
mapAttributeToCSSProperty(propertyNameToIdMap, font_stretchAttr);
mapAttributeToCSSProperty(propertyNameToIdMap, font_styleAttr);
mapAttributeToCSSProperty(propertyNameToIdMap, font_variantAttr);
mapAttributeToCSSProperty(propertyNameToIdMap, font_weightAttr);
}
return propertyNameToIdMap->get(attrName.localName().impl());
}
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()));
}
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() || parentNode()->hasTagName(SVGNames::fontTag));
return m_fontElement;
}
void SVGFontFaceElement::rebuildFontFace()
{
if (!inDocument()) {
ASSERT(!m_fontElement);
return;
}
SVGFontFaceSrcElement* srcElement = 0;
for (Node* child = firstChild(); child && !srcElement; child = child->nextSibling()) {
if (child->hasTagName(font_face_srcTag))
srcElement = static_cast<SVGFontFaceSrcElement*>(child);
}
bool describesParentFont = parentNode()->hasTagName(SVGNames::fontTag);
RefPtr<CSSValueList> list;
if (describesParentFont) {
m_fontElement = static_cast<SVGFontElement*>(parentNode());
list = CSSValueList::createCommaSeparated();
list->append(CSSFontFaceSrcValue::createLocal(fontFamily()));
} else {
m_fontElement = 0;
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 = static_cast<CSSValueList*>(src.get());
unsigned srcLength = srcList ? srcList->length() : 0;
for (unsigned i = 0; i < srcLength; i++) {
if (CSSFontFaceSrcValue* item = static_cast<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 = 0;
document()->accessSVGExtensions()->unregisterSVGFontFaceElement(this);
m_fontFaceRule->mutableProperties()->clear();
document()->styleResolverChanged(DeferRecalcStyle);
} else
ASSERT(!m_fontElement);
}
void SVGFontFaceElement::childrenChanged(bool changedByParser, Node* beforeChange, Node* afterChange, int childCountDelta)
{
SVGElement::childrenChanged(changedByParser, beforeChange, afterChange, childCountDelta);
rebuildFontFace();
}
}
#endif // ENABLE(SVG_FONTS)