StyleRecalcChange Element::recalcOwnStyle(StyleRecalcChange change)
{
ASSERT(document().inStyleRecalc());
ASSERT(!parentNode()->needsStyleRecalc());
ASSERT(change >= Inherit || needsStyleRecalc());
ASSERT(parentRenderStyle());
RefPtr<RenderStyle> oldStyle = renderStyle();
RefPtr<RenderStyle> newStyle = styleForRenderer();
StyleRecalcChange localChange = RenderStyle::stylePropagationDiff(oldStyle.get(), newStyle.get());
ASSERT(newStyle);
if (localChange == Reattach) {
AttachContext reattachContext;
reattachContext.resolvedStyle = newStyle.get();
reattach(reattachContext);
return Reattach;
}
ASSERT(oldStyle);
if (RenderObject* renderer = this->renderer()) {
if (localChange != NoChange)
renderer->setStyle(newStyle.get());
}
if (styleChangeType() >= SubtreeStyleChange)
return Force;
if (change > Inherit || localChange > Inherit)
return max(localChange, change);
return localChange;
}
// If a whitespace node had no renderer and goes through a recalcStyle it may
// need to create one if the parent style now has white-space: pre.
bool Text::needsWhitespaceRenderer()
{
ASSERT(!renderer());
if (RenderStyle* style = parentRenderStyle())
return style->preserveNewline();
return false;
}
void Element::recalcStyle(StyleRecalcChange change)
{
ASSERT(document().inStyleRecalc());
ASSERT(!parentNode()->needsStyleRecalc());
if (change >= Inherit || needsStyleRecalc()) {
if (hasRareData()) {
ElementRareData* data = elementRareData();
data->clearComputedStyle();
}
if (parentRenderStyle())
change = recalcOwnStyle(change);
clearNeedsStyleRecalc();
}
// If we reattached we don't need to recalc the style of our descendants anymore.
if ((change >= Inherit && change < Reattach) || childNeedsStyleRecalc()) {
recalcChildStyle(change);
clearChildNeedsStyleRecalc();
}
}