StyleSheet* StyleBase::stylesheet()
{
StyleBase *b = this;
while (b && !b->isStyleSheet())
b = b->parent();
return static_cast<StyleSheet*>(b);
}
static GroupId calculateGroupId(StyleBase* styleBase)
{
ASSERT(styleBase);
StyleBase* current = styleBase;
StyleSheet* styleSheet = 0;
while (true) {
// Special case: CSSStyleDeclarations might be either inline and in this case
// we need to group them with their node or regular ones.
if (current->isMutableStyleDeclaration()) {
CSSMutableStyleDeclaration* cssMutableStyleDeclaration = static_cast<CSSMutableStyleDeclaration*>(current);
if (cssMutableStyleDeclaration->isInlineStyleDeclaration()) {
ASSERT(cssMutableStyleDeclaration->parent()->isStyleSheet());
return calculateGroupId(cssMutableStyleDeclaration->node());
}
// Either we have no parent, or this parent is a CSSRule.
ASSERT(cssMutableStyleDeclaration->parent() == cssMutableStyleDeclaration->parentRule());
}
if (current->isStyleSheet())
styleSheet = static_cast<StyleSheet*>(current);
StyleBase* parent = current->parent();
if (!parent)
break;
current = parent;
}
if (styleSheet) {
if (Node* ownerNode = styleSheet->ownerNode())
return calculateGroupId(ownerNode);
return GroupId(styleSheet);
}
return GroupId(current);
}
