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);
}
ElementUpdate TreeResolver::createAnimatedElementUpdate(std::unique_ptr<RenderStyle> newStyle, RenderElement* rendererToUpdate, Document& document)
{
ElementUpdate update;
std::unique_ptr<RenderStyle> animatedStyle;
if (rendererToUpdate && document.frame()->animation().updateAnimations(*rendererToUpdate, *newStyle, animatedStyle))
update.isSynthetic = true;
if (animatedStyle) {
update.change = determineChange(rendererToUpdate->style(), *animatedStyle);
// If animation forces render tree reconstruction pass the original style. The animation will be applied on renderer construction.
// FIXME: We should always use the animated style here.
update.style = update.change == Detach ? WTFMove(newStyle) : WTFMove(animatedStyle);
} else {
update.change = rendererToUpdate ? determineChange(rendererToUpdate->style(), *newStyle) : Detach;
update.style = WTFMove(newStyle);
}
return update;
}
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 Change resolveLocal(Element* current, Change inheritedChange)
{
Change localChange = Detach;
RefPtr<RenderStyle> newStyle;
RefPtr<RenderStyle> currentStyle = current->renderStyle();
Document* document = current->document();
if (currentStyle) {
newStyle = current->styleForRenderer();
localChange = determineChange(currentStyle.get(), newStyle.get(), document->settings());
}
if (localChange == Detach) {
AttachContext reattachContext;
reattachContext.resolvedStyle = newStyle.get();
reattachRenderTree(current, reattachContext);
return Detach;
}
if (RenderObject* renderer = current->renderer()) {
if (localChange != NoChange || pseudoStyleCacheIsInvalid(renderer, newStyle.get()) || (inheritedChange == Force && renderer->requiresForcedStyleRecalcPropagation()) || current->styleChangeType() == SyntheticStyleChange)
renderer->setAnimatableStyle(newStyle.get());
else if (current->needsStyleRecalc()) {
// Although no change occurred, we use the new style so that the cousin style sharing code won't get
// fooled into believing this style is the same.
renderer->setStyleInternal(newStyle.get());
}
}
// If "rem" units are used anywhere in the document, and if the document element's font size changes, then go ahead and force font updating
// all the way down the tree. This is simpler than having to maintain a cache of objects (and such font size changes should be rare anyway).
if (document->styleSheetCollection()->usesRemUnits() && document->documentElement() == current && localChange != NoChange && currentStyle && newStyle && currentStyle->fontSize() != newStyle->fontSize()) {
// Cached RenderStyles may depend on the re units.
if (StyleResolver* styleResolver = document->styleResolverIfExists())
styleResolver->invalidateMatchedPropertiesCache();
return Force;
}
if (inheritedChange == Force)
return Force;
if (current->styleChangeType() >= FullStyleChange)
return Force;
return localChange;
}