void resolveTree(Document& document, Change change)
{
bool resolveRootStyle = change == Force || (document.shouldDisplaySeamlesslyWithParent() && change >= Inherit);
if (resolveRootStyle) {
RefPtr<RenderStyle> documentStyle = resolveForDocument(document);
#if PLATFORM(IOS)
// Inserting the pictograph font at the end of the font fallback list is done by the
// font selector, so set a font selector if needed.
if (Settings* settings = document.settings()) {
StyleResolver* styleResolver = document.styleResolverIfExists();
if (settings->fontFallbackPrefersPictographs() && styleResolver)
documentStyle->font().update(styleResolver->fontSelector());
}
#endif
Style::Change documentChange = determineChange(documentStyle.get(), document.renderer()->style(), document.settings());
if (documentChange != NoChange)
document.renderer()->setStyle(documentStyle.release());
}
Element* documentElement = document.documentElement();
if (!documentElement)
return;
if (change < Inherit && !documentElement->childNeedsStyleRecalc() && !documentElement->needsStyleRecalc())
return;
resolveTree(*documentElement, change);
}
void resolveTree(Document* document, Change change)
{
bool resolveRootStyle = change == Force || (document->shouldDisplaySeamlesslyWithParent() && change >= Inherit);
if (resolveRootStyle) {
RefPtr<RenderStyle> documentStyle = resolveForDocument(document);
Style::Change documentChange = determineChange(documentStyle.get(), document->renderer()->style(), document->settings());
if (documentChange != NoChange)
document->renderer()->setStyle(documentStyle.release());
}
for (Element* child = ElementTraversal::firstWithin(document); child; child = ElementTraversal::nextSibling(child)) {
if (change < Inherit && !child->childNeedsStyleRecalc() && !child->needsStyleRecalc())
continue;
resolveTree(child, change);
}
}
static void resolveShadowTree(ShadowRoot* shadowRoot, RenderStyle* parentElementStyle, Style::Change change)
{
if (!shadowRoot)
return;
StyleResolver& styleResolver = shadowRoot->document()->ensureStyleResolver();
styleResolver.pushParentShadowRoot(shadowRoot);
for (Node* child = shadowRoot->firstChild(); child; child = child->nextSibling()) {
if (child->isTextNode()) {
// Current user agent ShadowRoots don't have immediate text children so this branch is never actually taken.
updateTextStyle(toText(child), parentElementStyle, change);
continue;
}
resolveTree(toElement(child), change);
}
styleResolver.popParentShadowRoot(shadowRoot);
shadowRoot->clearNeedsStyleRecalc();
shadowRoot->clearChildNeedsStyleRecalc();
}
void resolveTree(Element* current, Change change)
{
ASSERT(change != Detach);
if (current->hasCustomStyleResolveCallbacks()) {
if (!current->willRecalcStyle(change))
return;
}
bool hasParentStyle = current->parentNodeForRenderingAndStyle() && current->parentNodeForRenderingAndStyle()->renderStyle();
bool hasDirectAdjacentRules = current->childrenAffectedByDirectAdjacentRules();
bool hasIndirectAdjacentRules = current->childrenAffectedByForwardPositionalRules();
if (change > NoChange || current->needsStyleRecalc())
current->resetComputedStyle();
if (hasParentStyle && (change >= Inherit || current->needsStyleRecalc()))
change = resolveLocal(current, change);
if (change != Detach) {
StyleResolverParentPusher parentPusher(current);
RenderStyle* currentStyle = current->renderStyle();
if (ShadowRoot* shadowRoot = current->shadowRoot()) {
if (change >= Inherit || shadowRoot->childNeedsStyleRecalc() || shadowRoot->needsStyleRecalc()) {
parentPusher.push();
resolveShadowTree(shadowRoot, currentStyle, change);
}
}
current->updateBeforePseudoElement(change);
// FIXME: This check is good enough for :hover + foo, but it is not good enough for :hover + foo + bar.
// For now we will just worry about the common case, since it's a lot trickier to get the second case right
// without doing way too much re-resolution.
bool forceCheckOfNextElementSibling = false;
bool forceCheckOfAnyElementSibling = false;
for (Node* child = current->firstChild(); child; child = child->nextSibling()) {
if (child->isTextNode()) {
updateTextStyle(toText(child), currentStyle, change);
continue;
}
if (!child->isElementNode())
continue;
Element* childElement = toElement(child);
bool childRulesChanged = childElement->needsStyleRecalc() && childElement->styleChangeType() == FullStyleChange;
if ((forceCheckOfNextElementSibling || forceCheckOfAnyElementSibling))
childElement->setNeedsStyleRecalc();
if (change >= Inherit || childElement->childNeedsStyleRecalc() || childElement->needsStyleRecalc()) {
parentPusher.push();
resolveTree(childElement, change);
}
forceCheckOfNextElementSibling = childRulesChanged && hasDirectAdjacentRules;
forceCheckOfAnyElementSibling = forceCheckOfAnyElementSibling || (childRulesChanged && hasIndirectAdjacentRules);
}
current->updateAfterPseudoElement(change);
}
current->clearNeedsStyleRecalc();
current->clearChildNeedsStyleRecalc();
if (current->hasCustomStyleResolveCallbacks())
current->didRecalcStyle(change);
}