void TreeScope::setParentTreeScope(TreeScope& newParentScope) {
// A document node cannot be re-parented.
DCHECK(!rootNode().isDocumentNode());
m_parentTreeScope = &newParentScope;
setDocument(newParentScope.document());
}
AtomicString SVGURIReference::fragmentIdentifierFromIRIString(
const String& urlString,
const TreeScope& treeScope) {
SVGURLReferenceResolver resolver(urlString, treeScope.document());
if (!resolver.isLocal())
return emptyAtom;
return resolver.fragmentIdentifier();
}
void TreeScope::setParentTreeScope(TreeScope& newParentScope)
{
// A document node cannot be re-parented.
ASSERT(!rootNode().isDocumentNode());
newParentScope.guardRef();
if (m_parentTreeScope)
m_parentTreeScope->guardDeref();
m_parentTreeScope = &newParentScope;
setDocument(newParentScope.document());
}
AtomicString SVGURIReference::fragmentIdentifierFromIRIString(const String& url, const TreeScope& treeScope)
{
size_t start = url.find('#');
if (start == kNotFound)
return emptyAtom;
const Document& document = treeScope.document();
KURL base = start ? KURL(document.baseURI(), url.substring(0, start)) : document.baseURI();
if (equalIgnoringFragmentIdentifier(base, document.url()))
return AtomicString(url.substring(start + 1));
return emptyAtom;
}
static inline KURL urlFromIRIStringWithFragmentIdentifier(const String& url, const TreeScope& treeScope, AtomicString& fragmentIdentifier)
{
size_t startOfFragmentIdentifier = url.find('#');
if (startOfFragmentIdentifier == kNotFound)
return KURL();
const Document& document = treeScope.document();
// Exclude the '#' character when determining the fragmentIdentifier.
fragmentIdentifier = AtomicString(url.substring(startOfFragmentIdentifier + 1));
if (startOfFragmentIdentifier) {
KURL base(document.baseURI(), url.substring(0, startOfFragmentIdentifier));
return KURL(base, url.substring(startOfFragmentIdentifier));
}
return KURL(document.baseURI(), url.substring(startOfFragmentIdentifier));
}
void ScopedStyleResolver::keyframesRulesAdded(const TreeScope& treeScope) {
// Called when @keyframes rules are about to be added/removed from a
// TreeScope. @keyframes rules may apply to animations on elements in the
// same TreeScope as the stylesheet, or the host element in the parent
// TreeScope if the TreeScope is a shadow tree.
ScopedStyleResolver* resolver = treeScope.scopedStyleResolver();
ScopedStyleResolver* parentResolver =
treeScope.parentTreeScope()
? treeScope.parentTreeScope()->scopedStyleResolver()
: nullptr;
bool hadUnresolvedKeyframes = false;
if (resolver && resolver->m_hasUnresolvedKeyframesRule) {
resolver->m_hasUnresolvedKeyframesRule = false;
hadUnresolvedKeyframes = true;
}
if (parentResolver && parentResolver->m_hasUnresolvedKeyframesRule) {
parentResolver->m_hasUnresolvedKeyframesRule = false;
hadUnresolvedKeyframes = true;
}
if (hadUnresolvedKeyframes) {
// If an animation ended up not being started because no @keyframes
// rules were found for the animation-name, we need to recalculate style
// for the elements in the scope, including its shadow host if
// applicable.
invalidationRootForTreeScope(treeScope).setNeedsStyleRecalc(
SubtreeStyleChange, StyleChangeReasonForTracing::create(
StyleChangeReason::StyleSheetChange));
return;
}
// If we have animations running, added/removed @keyframes may affect these.
treeScope.document().timeline().invalidateKeyframeEffects(treeScope);
}
PassRefPtr<FilterEffect> ReferenceFilterBuilder::build(Filter* parentFilter, RenderObject* renderer, FilterEffect* previousEffect, const ReferenceFilterOperation* filterOperation)
{
if (!renderer)
return nullptr;
TreeScope* treeScope = &renderer->node()->treeScope();
if (DocumentResourceReference* documentResourceRef = documentResourceReference(filterOperation)) {
DocumentResource* cachedSVGDocument = documentResourceRef->document();
// If we have an SVG document, this is an external reference. Otherwise
// we look up the referenced node in the current document.
if (cachedSVGDocument)
treeScope = cachedSVGDocument->document();
}
if (!treeScope)
return nullptr;
Element* filter = treeScope->getElementById(filterOperation->fragment());
if (!filter) {
// Although we did not find the referenced filter, it might exist later
// in the document.
treeScope->document().accessSVGExtensions().addPendingResource(filterOperation->fragment(), toElement(renderer->node()));
return nullptr;
}
if (!isSVGFilterElement(*filter))
return nullptr;
SVGFilterElement& filterElement = toSVGFilterElement(*filter);
// FIXME: Figure out what to do with SourceAlpha. Right now, we're
// using the alpha of the original input layer, which is obviously
// wrong. We should probably be extracting the alpha from the
// previousEffect, but this requires some more processing.
// This may need a spec clarification.
RefPtr<SVGFilterBuilder> builder = SVGFilterBuilder::create(previousEffect, SourceAlpha::create(parentFilter));
ColorSpace filterColorSpace = ColorSpaceDeviceRGB;
bool useFilterColorSpace = getSVGElementColorSpace(&filterElement, filterColorSpace);
for (SVGElement* element = Traversal<SVGElement>::firstChild(filterElement); element; element = Traversal<SVGElement>::nextSibling(*element)) {
if (!element->isFilterEffect())
continue;
SVGFilterPrimitiveStandardAttributes* effectElement = static_cast<SVGFilterPrimitiveStandardAttributes*>(element);
RefPtr<FilterEffect> effect = effectElement->build(builder.get(), parentFilter);
if (!effect)
continue;
effectElement->setStandardAttributes(effect.get());
effect->setEffectBoundaries(SVGLengthContext::resolveRectangle<SVGFilterPrimitiveStandardAttributes>(effectElement, filterElement.primitiveUnits()->currentValue()->enumValue(), parentFilter->sourceImageRect()));
ColorSpace colorSpace = filterColorSpace;
if (useFilterColorSpace || getSVGElementColorSpace(effectElement, colorSpace))
effect->setOperatingColorSpace(colorSpace);
builder->add(AtomicString(effectElement->result()->currentValue()->value()), effect);
}
return builder->lastEffect();
}