void DocAccessibleWrap::CacheViewportCallback(nsITimer* aTimer, void* aDocAccParam) { RefPtr<DocAccessibleWrap> docAcc( dont_AddRef(reinterpret_cast<DocAccessibleWrap*>(aDocAccParam))); if (!docAcc) { return; } nsIPresShell* presShell = docAcc->PresShell(); if (!presShell) { return; } nsIFrame* rootFrame = presShell->GetRootFrame(); if (!rootFrame) { return; } nsTArray<nsIFrame*> frames; nsIScrollableFrame* sf = presShell->GetRootScrollFrameAsScrollable(); nsRect scrollPort = sf ? sf->GetScrollPortRect() : rootFrame->GetRect(); nsLayoutUtils::GetFramesForArea( presShell->GetRootFrame(), scrollPort, frames, nsLayoutUtils::FrameForPointFlags::ONLY_VISIBLE); AccessibleHashtable inViewAccs; for (size_t i = 0; i < frames.Length(); i++) { nsIContent* content = frames.ElementAt(i)->GetContent(); if (!content) { continue; } Accessible* visibleAcc = docAcc->GetAccessibleOrContainer(content); if (!visibleAcc) { continue; } for (Accessible* acc = visibleAcc; acc && acc != docAcc->Parent(); acc = acc->Parent()) { if (inViewAccs.Contains(acc->UniqueID())) { break; } inViewAccs.Put(acc->UniqueID(), acc); } } if (IPCAccessibilityActive()) { DocAccessibleChild* ipcDoc = docAcc->IPCDoc(); nsTArray<BatchData> cacheData(inViewAccs.Count()); for (auto iter = inViewAccs.Iter(); !iter.Done(); iter.Next()) { Accessible* accessible = iter.Data(); auto uid = accessible->IsDoc() && accessible->AsDoc()->IPCDoc() ? 0 : reinterpret_cast<uint64_t>(accessible->UniqueID()); cacheData.AppendElement( BatchData(accessible->Document()->IPCDoc(), uid, accessible->State(), accessible->Bounds(), accessible->ActionCount(), nsString(), nsString(), nsString(), UnspecifiedNaN<double>(), UnspecifiedNaN<double>(), UnspecifiedNaN<double>(), UnspecifiedNaN<double>(), nsTArray<Attribute>())); } ipcDoc->SendBatch(eBatch_Viewport, cacheData); } else if (SessionAccessibility* sessionAcc = SessionAccessibility::GetInstanceFor(docAcc)) { nsTArray<AccessibleWrap*> accessibles(inViewAccs.Count()); for (auto iter = inViewAccs.Iter(); !iter.Done(); iter.Next()) { accessibles.AppendElement( static_cast<AccessibleWrap*>(iter.Data().get())); } sessionAcc->ReplaceViewportCache(accessibles); } if (docAcc->mCacheRefreshTimer) { docAcc->mCacheRefreshTimer = nullptr; } }