PLDHashOperator
NotificationController::TextEnumerator(nsCOMPtrHashKey<nsIContent>* aEntry,
void* aUserArg)
{
DocAccessible* document = static_cast<DocAccessible*>(aUserArg);
nsIContent* textNode = aEntry->GetKey();
Accessible* textAcc = document->GetAccessible(textNode);
// If the text node is not in tree or doesn't have frame then this case should
// have been handled already by content removal notifications.
nsINode* containerNode = textNode->GetParentNode();
if (!containerNode) {
NS_ASSERTION(!textAcc,
"Text node was removed but accessible is kept alive!");
return PL_DHASH_NEXT;
}
nsIFrame* textFrame = textNode->GetPrimaryFrame();
if (!textFrame) {
NS_ASSERTION(!textAcc,
"Text node isn't rendered but accessible is kept alive!");
return PL_DHASH_NEXT;
}
nsIContent* containerElm = containerNode->IsElement() ?
containerNode->AsElement() : nullptr;
nsAutoString text;
textFrame->GetRenderedText(&text);
// Remove text accessible if rendered text is empty.
if (textAcc) {
if (text.IsEmpty()) {
#ifdef A11Y_LOG
if (logging::IsEnabled(logging::eTree | logging::eText)) {
logging::MsgBegin("TREE", "text node lost its content");
logging::Node("container", containerElm);
logging::Node("content", textNode);
logging::MsgEnd();
}
#endif
document->ContentRemoved(containerElm, textNode);
return PL_DHASH_NEXT;
}
// Update text of the accessible and fire text change events.
#ifdef A11Y_LOG
if (logging::IsEnabled(logging::eText)) {
logging::MsgBegin("TEXT", "text may be changed");
logging::Node("container", containerElm);
logging::Node("content", textNode);
logging::MsgEntry("old text '%s'",
NS_ConvertUTF16toUTF8(textAcc->AsTextLeaf()->Text()).get());
logging::MsgEntry("new text: '%s'",
NS_ConvertUTF16toUTF8(text).get());
logging::MsgEnd();
}
#endif
TextUpdater::Run(document, textAcc->AsTextLeaf(), text);
return PL_DHASH_NEXT;
}
// Append an accessible if rendered text is not empty.
if (!text.IsEmpty()) {
#ifdef A11Y_LOG
if (logging::IsEnabled(logging::eTree | logging::eText)) {
logging::MsgBegin("TREE", "text node gains new content");
logging::Node("container", containerElm);
logging::Node("content", textNode);
logging::MsgEnd();
}
#endif
// Make sure the text node is in accessible document still.
Accessible* container = document->GetAccessibleOrContainer(containerNode);
NS_ASSERTION(container,
"Text node having rendered text hasn't accessible document!");
if (container) {
nsTArray<nsCOMPtr<nsIContent> > insertedContents;
insertedContents.AppendElement(textNode);
document->ProcessContentInserted(container, &insertedContents);
}
}
return PL_DHASH_NEXT;
}
void
NotificationController::WillRefresh(mozilla::TimeStamp aTime)
{
Telemetry::AutoTimer<Telemetry::A11Y_UPDATE_TIME> updateTimer;
// If the document accessible that notification collector was created for is
// now shut down, don't process notifications anymore.
NS_ASSERTION(mDocument,
"The document was shut down while refresh observer is attached!");
if (!mDocument)
return;
if (mObservingState == eRefreshProcessing ||
mObservingState == eRefreshProcessingForUpdate)
return;
// Any generic notifications should be queued if we're processing content
// insertions or generic notifications.
mObservingState = eRefreshProcessingForUpdate;
// Initial accessible tree construction.
if (!mDocument->HasLoadState(DocAccessible::eTreeConstructed)) {
// If document is not bound to parent at this point then the document is not
// ready yet (process notifications later).
if (!mDocument->IsBoundToParent()) {
mObservingState = eRefreshObserving;
return;
}
#ifdef A11Y_LOG
if (logging::IsEnabled(logging::eTree)) {
logging::MsgBegin("TREE", "initial tree created");
logging::Address("document", mDocument);
logging::MsgEnd();
}
#endif
mDocument->DoInitialUpdate();
NS_ASSERTION(mContentInsertions.Length() == 0,
"Pending content insertions while initial accessible tree isn't created!");
}
// Initialize scroll support if needed.
if (!(mDocument->mDocFlags & DocAccessible::eScrollInitialized))
mDocument->AddScrollListener();
// Process content inserted notifications to update the tree. Process other
// notifications like DOM events and then flush event queue. If any new
// notifications are queued during this processing then they will be processed
// on next refresh. If notification processing queues up new events then they
// are processed in this refresh. If events processing queues up new events
// then new events are processed on next refresh.
// Note: notification processing or event handling may shut down the owning
// document accessible.
// Process only currently queued content inserted notifications.
nsTArray<nsRefPtr<ContentInsertion> > contentInsertions;
contentInsertions.SwapElements(mContentInsertions);
uint32_t insertionCount = contentInsertions.Length();
for (uint32_t idx = 0; idx < insertionCount; idx++) {
contentInsertions[idx]->Process();
if (!mDocument)
return;
}
// Process rendered text change notifications.
for (auto iter = mTextHash.Iter(); !iter.Done(); iter.Next()) {
nsCOMPtrHashKey<nsIContent>* entry = iter.Get();
nsIContent* textNode = entry->GetKey();
Accessible* textAcc = mDocument->GetAccessible(textNode);
// If the text node is not in tree or doesn't have frame then this case should
// have been handled already by content removal notifications.
nsINode* containerNode = textNode->GetParentNode();
if (!containerNode) {
NS_ASSERTION(!textAcc,
"Text node was removed but accessible is kept alive!");
continue;
}
nsIFrame* textFrame = textNode->GetPrimaryFrame();
if (!textFrame) {
NS_ASSERTION(!textAcc,
"Text node isn't rendered but accessible is kept alive!");
continue;
}
nsIContent* containerElm = containerNode->IsElement() ?
containerNode->AsElement() : nullptr;
nsAutoString text;
textFrame->GetRenderedText(&text);
// Remove text accessible if rendered text is empty.
if (textAcc) {
if (text.IsEmpty()) {
#ifdef A11Y_LOG
if (logging::IsEnabled(logging::eTree | logging::eText)) {
logging::MsgBegin("TREE", "text node lost its content");
logging::Node("container", containerElm);
logging::Node("content", textNode);
logging::MsgEnd();
}
#endif
mDocument->ContentRemoved(containerElm, textNode);
continue;
}
// Update text of the accessible and fire text change events.
#ifdef A11Y_LOG
if (logging::IsEnabled(logging::eText)) {
logging::MsgBegin("TEXT", "text may be changed");
logging::Node("container", containerElm);
logging::Node("content", textNode);
logging::MsgEntry("old text '%s'",
NS_ConvertUTF16toUTF8(textAcc->AsTextLeaf()->Text()).get());
logging::MsgEntry("new text: '%s'",
NS_ConvertUTF16toUTF8(text).get());
logging::MsgEnd();
}
#endif
TextUpdater::Run(mDocument, textAcc->AsTextLeaf(), text);
continue;
}
// Append an accessible if rendered text is not empty.
if (!text.IsEmpty()) {
#ifdef A11Y_LOG
if (logging::IsEnabled(logging::eTree | logging::eText)) {
logging::MsgBegin("TREE", "text node gains new content");
logging::Node("container", containerElm);
logging::Node("content", textNode);
logging::MsgEnd();
}
#endif
// Make sure the text node is in accessible document still.
Accessible* container = mDocument->GetAccessibleOrContainer(containerNode);
NS_ASSERTION(container,
"Text node having rendered text hasn't accessible document!");
if (container) {
nsTArray<nsCOMPtr<nsIContent> > insertedContents;
insertedContents.AppendElement(textNode);
mDocument->ProcessContentInserted(container, &insertedContents);
}
}
}
mTextHash.Clear();
// Bind hanging child documents.
uint32_t hangingDocCnt = mHangingChildDocuments.Length();
nsTArray<nsRefPtr<DocAccessible>> newChildDocs;
for (uint32_t idx = 0; idx < hangingDocCnt; idx++) {
DocAccessible* childDoc = mHangingChildDocuments[idx];
if (childDoc->IsDefunct())
continue;
nsIContent* ownerContent = mDocument->DocumentNode()->
FindContentForSubDocument(childDoc->DocumentNode());
if (ownerContent) {
Accessible* outerDocAcc = mDocument->GetAccessible(ownerContent);
if (outerDocAcc && outerDocAcc->AppendChild(childDoc)) {
if (mDocument->AppendChildDocument(childDoc)) {
newChildDocs.AppendElement(Move(mHangingChildDocuments[idx]));
continue;
}
outerDocAcc->RemoveChild(childDoc);
}
// Failed to bind the child document, destroy it.
childDoc->Shutdown();
}
}
mHangingChildDocuments.Clear();
// If the document is ready and all its subdocuments are completely loaded
// then process the document load.
if (mDocument->HasLoadState(DocAccessible::eReady) &&
!mDocument->HasLoadState(DocAccessible::eCompletelyLoaded) &&
hangingDocCnt == 0) {
uint32_t childDocCnt = mDocument->ChildDocumentCount(), childDocIdx = 0;
for (; childDocIdx < childDocCnt; childDocIdx++) {
DocAccessible* childDoc = mDocument->GetChildDocumentAt(childDocIdx);
if (!childDoc->HasLoadState(DocAccessible::eCompletelyLoaded))
break;
}
if (childDocIdx == childDocCnt) {
mDocument->ProcessLoad();
if (!mDocument)
return;
}
}
// Process only currently queued generic notifications.
nsTArray < nsRefPtr<Notification> > notifications;
notifications.SwapElements(mNotifications);
uint32_t notificationCount = notifications.Length();
for (uint32_t idx = 0; idx < notificationCount; idx++) {
notifications[idx]->Process();
if (!mDocument)
return;
}
// Process invalidation list of the document after all accessible tree
// modification are done.
mDocument->ProcessInvalidationList();
// If a generic notification occurs after this point then we may be allowed to
// process it synchronously. However we do not want to reenter if fireing
// events causes script to run.
mObservingState = eRefreshProcessing;
ProcessEventQueue();
if (IPCAccessibilityActive()) {
size_t newDocCount = newChildDocs.Length();
for (size_t i = 0; i < newDocCount; i++) {
DocAccessible* childDoc = newChildDocs[i];
Accessible* parent = childDoc->Parent();
DocAccessibleChild* parentIPCDoc = mDocument->IPCDoc();
uint64_t id = reinterpret_cast<uintptr_t>(parent->UniqueID());
MOZ_ASSERT(id);
DocAccessibleChild* ipcDoc = childDoc->IPCDoc();
if (ipcDoc) {
parentIPCDoc->SendBindChildDoc(ipcDoc, id);
continue;
}
ipcDoc = new DocAccessibleChild(childDoc);
childDoc->SetIPCDoc(ipcDoc);
nsCOMPtr<nsITabChild> tabChild =
do_GetInterface(mDocument->DocumentNode()->GetDocShell());
static_cast<TabChild*>(tabChild.get())->
SendPDocAccessibleConstructor(ipcDoc, parentIPCDoc, id);
}
}
mObservingState = eRefreshObserving;
if (!mDocument)
return;
// Stop further processing if there are no new notifications of any kind or
// events and document load is processed.
if (mContentInsertions.IsEmpty() && mNotifications.IsEmpty() &&
mEvents.IsEmpty() && mTextHash.Count() == 0 &&
mHangingChildDocuments.IsEmpty() &&
mDocument->HasLoadState(DocAccessible::eCompletelyLoaded) &&
mPresShell->RemoveRefreshObserver(this, Flush_Display)) {
mObservingState = eNotObservingRefresh;
}
}
PLDHashOperator
NotificationController::TextEnumerator(nsCOMPtrHashKey<nsIContent>* aEntry,
void* aUserArg)
{
DocAccessible* document = static_cast<DocAccessible*>(aUserArg);
nsIContent* textNode = aEntry->GetKey();
Accessible* textAcc = document->GetAccessible(textNode);
// If the text node is not in tree or doesn't have frame then this case should
// have been handled already by content removal notifications.
nsINode* containerNode = textNode->GetNodeParent();
if (!containerNode) {
NS_ASSERTION(!textAcc,
"Text node was removed but accessible is kept alive!");
return PL_DHASH_NEXT;
}
nsIFrame* textFrame = textNode->GetPrimaryFrame();
if (!textFrame) {
NS_ASSERTION(!textAcc,
"Text node isn't rendered but accessible is kept alive!");
return PL_DHASH_NEXT;
}
nsIContent* containerElm = containerNode->IsElement() ?
containerNode->AsElement() : nsnull;
nsAutoString text;
textFrame->GetRenderedText(&text);
// Remove text accessible if rendered text is empty.
if (textAcc) {
if (text.IsEmpty()) {
#ifdef DEBUG_NOTIFICATIONS
PRUint32 index = containerNode->IndexOf(textNode);
nsCAutoString tag;
nsCAutoString id;
if (containerElm) {
containerElm->Tag()->ToUTF8String(tag);
nsIAtom* atomid = containerElm->GetID();
if (atomid)
atomid->ToUTF8String(id);
}
printf("\npending text node removal: container: %s@id='%s', index in container: %d\n\n",
tag.get(), id.get(), index);
#endif
document->ContentRemoved(containerElm, textNode);
return PL_DHASH_NEXT;
}
// Update text of the accessible and fire text change events.
#ifdef DEBUG_TEXTCHANGE
PRUint32 index = containerNode->IndexOf(textNode);
nsCAutoString tag;
nsCAutoString id;
if (containerElm) {
containerElm->Tag()->ToUTF8String(tag);
nsIAtom* atomid = containerElm->GetID();
if (atomid)
atomid->ToUTF8String(id);
}
printf("\ntext may be changed: container: %s@id='%s', index in container: %d, old text '%s', new text: '%s'\n\n",
tag.get(), id.get(), index,
NS_ConvertUTF16toUTF8(textAcc->AsTextLeaf()->Text()).get(),
NS_ConvertUTF16toUTF8(text).get());
#endif
TextUpdater::Run(document, textAcc->AsTextLeaf(), text);
return PL_DHASH_NEXT;
}
// Append an accessible if rendered text is not empty.
if (!text.IsEmpty()) {
#ifdef DEBUG_NOTIFICATIONS
PRUint32 index = containerNode->IndexOf(textNode);
nsCAutoString tag;
nsCAutoString id;
if (containerElm) {
containerElm->Tag()->ToUTF8String(tag);
nsIAtom* atomid = containerElm->GetID();
if (atomid)
atomid->ToUTF8String(id);
}
printf("\npending text node insertion: container: %s@id='%s', index in container: %d\n\n",
tag.get(), id.get(), index);
#endif
// Make sure the text node is in accessible document still.
Accessible* container = document->GetAccessibleOrContainer(containerNode);
NS_ASSERTION(container,
"Text node having rendered text hasn't accessible document!");
if (container) {
nsTArray<nsCOMPtr<nsIContent> > insertedContents;
insertedContents.AppendElement(textNode);
document->ProcessContentInserted(container, &insertedContents);
}
}
return PL_DHASH_NEXT;
}