RenderRubyRun* RenderRubyBase::rubyRun() const
{
ASSERT(parent());
ASSERT(parent()->isRubyRun());
return &toRenderRubyRun(*parent());
}
static RenderRubyRun* lastRubyRun(const RenderObject* ruby)
{
RenderObject* child = ruby->lastChild();
if (child && !child->isRubyRun())
child = child->previousSibling();
ASSERT(!child || child->isRubyRun() || child->isBeforeContent() || child == rubyBeforeBlock(ruby));
return child && child->isRubyRun() ? toRenderRubyRun(child) : 0;
}
static inline RenderRubyRun& findRubyRunParent(RenderObject& child)
{
RenderObject* ancestor = &child;
while (ancestor && !ancestor->isRubyRun())
ancestor = ancestor->parent();
ASSERT(ancestor);
return toRenderRubyRun(*ancestor);
}
RenderObject* RenderRubyRun::removeChild(RenderObject& child)
{
// If the child is a ruby text, then merge the ruby base with the base of
// the right sibling run, if possible.
if (!beingDestroyed() && !documentBeingDestroyed() && child.isRubyText()) {
RenderRubyBase* base = rubyBase();
RenderObject* rightNeighbour = nextSibling();
if (base && rightNeighbour && rightNeighbour->isRubyRun()) {
// Ruby run without a base can happen only at the first run.
RenderRubyRun* rightRun = toRenderRubyRun(rightNeighbour);
if (rightRun->hasRubyBase()) {
RenderRubyBase* rightBase = rightRun->rubyBaseSafe();
// Collect all children in a single base, then swap the bases.
rightBase->mergeChildrenWithBase(base);
moveChildTo(rightRun, base);
rightRun->moveChildTo(this, rightBase);
// The now empty ruby base will be removed below.
ASSERT(!rubyBase()->firstChild());
}
}
}
RenderObject* next = RenderBlockFlow::removeChild(child);
if (!beingDestroyed() && !documentBeingDestroyed()) {
// Check if our base (if any) is now empty. If so, destroy it.
RenderBlock* base = rubyBase();
if (base && !base->firstChild()) {
next = RenderBlockFlow::removeChild(*base);
base->deleteLines();
base->destroy();
}
// If any of the above leaves the run empty, destroy it as well.
if (isEmpty()) {
parent()->removeChild(*this);
deleteLines();
destroy();
next = nullptr;
}
}
return next;
}
static inline RenderRubyRun* findRubyRunParent(RenderObject* child)
{
while (child && !child->isRubyRun())
child = child->parent();
return toRenderRubyRun(child);
}