void PageCache::addIfCacheable(HistoryItem& item, Page* page)
{
if (item.isInPageCache())
return;
if (!page || !canCache(*page))
return;
// Make sure all the documents know they are being added to the PageCache.
setInPageCache(*page, true);
// Focus the main frame, defocusing a focused subframe (if we have one). We do this here,
// before the page enters the page cache, while we still can dispatch DOM blur/focus events.
if (page->focusController().focusedFrame())
page->focusController().setFocusedFrame(&page->mainFrame());
// Fire the pagehide event in all frames.
firePageHideEventRecursively(page->mainFrame());
// Check that the page is still page-cacheable after firing the pagehide event. The JS event handlers
// could have altered the page in a way that could prevent caching.
if (!canCache(*page)) {
setInPageCache(*page, false);
return;
}
// Make sure we no longer fire any JS events past this point.
NoEventDispatchAssertion assertNoEventDispatch;
item.m_cachedPage = std::make_unique<CachedPage>(*page);
item.m_pruningReason = PruningReason::None;
m_items.add(&item);
prune(PruningReason::ReachedMaxSize);
}
void PageCache::add(HistoryItem& item, Page& page)
{
ASSERT(canCache(&page));
// Remove stale cache entry if necessary.
remove(item);
item.m_cachedPage = std::make_unique<CachedPage>(page);
item.m_pruningReason = PruningReason::None;
m_items.add(&item);
prune(PruningReason::ReachedMaxSize);
}
void PageCache::add(PassRefPtr<HistoryItem> prpItem, Page& page)
{
ASSERT(prpItem);
ASSERT(canCache(&page));
HistoryItem* item = prpItem.leakRef(); // Balanced in remove().
// Remove stale cache entry if necessary.
if (item->m_cachedPage)
remove(item);
item->m_cachedPage = std::make_unique<CachedPage>(page);
addToLRUList(item);
++m_size;
prune();
}
