void
ZoomConstraintsClient::Destroy()
{
if (!(mPresShell && mDocument)) {
return;
}
ZCC_LOG("Destroying %p\n", this);
if (mEventTarget) {
mEventTarget->RemoveEventListener(DOM_META_ADDED, this, false);
mEventTarget = nullptr;
}
nsCOMPtr<nsIObserverService> observerService = mozilla::services::GetObserverService();
if (observerService) {
observerService->RemoveObserver(this, BEFORE_FIRST_PAINT.Data());
}
if (mGuid) {
if (nsIWidget* widget = GetWidget(mPresShell)) {
ZCC_LOG("Sending null constraints in %p for { %u, %" PRIu64 " }\n",
this, mGuid->mPresShellId, mGuid->mScrollId);
widget->UpdateZoomConstraints(mGuid->mPresShellId, mGuid->mScrollId, Nothing());
mGuid = Nothing();
}
}
mDocument = nullptr;
mPresShell = nullptr;
}
MobileViewportManager::MobileViewportManager(nsIPresShell* aPresShell,
nsIDocument* aDocument)
: mDocument(aDocument)
, mPresShell(aPresShell)
, mIsFirstPaint(false)
, mPainted(false)
{
MOZ_ASSERT(mPresShell);
MOZ_ASSERT(mDocument);
MVM_LOG("%p: creating with presShell %p document %p\n", this, mPresShell, aDocument);
if (nsCOMPtr<nsPIDOMWindowOuter> window = mDocument->GetWindow()) {
mEventTarget = window->GetChromeEventHandler();
}
if (mEventTarget) {
mEventTarget->AddEventListener(DOM_META_ADDED, this, false);
mEventTarget->AddEventListener(DOM_META_CHANGED, this, false);
mEventTarget->AddEventListener(FULL_ZOOM_CHANGE, this, false);
mEventTarget->AddEventListener(LOAD, this, true);
}
nsCOMPtr<nsIObserverService> observerService = mozilla::services::GetObserverService();
if (observerService) {
observerService->AddObserver(this, BEFORE_FIRST_PAINT.Data(), false);
}
}
void
ZoomConstraintsClient::Init(nsIPresShell* aPresShell, nsIDocument* aDocument)
{
if (!(aPresShell && aDocument)) {
return;
}
mPresShell = aPresShell;
mDocument = aDocument;
if (nsCOMPtr<nsPIDOMWindow> window = mDocument->GetWindow()) {
mEventTarget = window->GetChromeEventHandler();
}
if (mEventTarget) {
mEventTarget->AddEventListener(DOM_META_ADDED, this, false);
mEventTarget->AddEventListener(DOM_META_CHANGED, this, false);
}
nsCOMPtr<nsIObserverService> observerService = mozilla::services::GetObserverService();
if (observerService) {
observerService->AddObserver(this, BEFORE_FIRST_PAINT.Data(), false);
}
Preferences::AddStrongObserver(this, "browser.ui.zoom.force-user-scalable");
}
NS_IMETHODIMP
ZoomConstraintsClient::Observe(nsISupports* aSubject, const char* aTopic, const char16_t* aData)
{
if (SameCOMIdentity(aSubject, mDocument) && BEFORE_FIRST_PAINT.EqualsASCII(aTopic)) {
ZCC_LOG("Got a before-first-paint event in %p\n", this);
RefreshZoomConstraints();
} else if (NS_PREF_CHANGED.EqualsASCII(aTopic)) {
ZCC_LOG("Got a pref-change event in %p\n", this);
// We need to run this later because all the pref change listeners need
// to execute before we can be guaranteed that gfxPrefs::ForceUserScalable()
// returns the updated value.
NS_DispatchToMainThread(NS_NewRunnableMethod(
this, &ZoomConstraintsClient::RefreshZoomConstraints));
}
return NS_OK;
}
NS_IMETHODIMP
ZoomConstraintsClient::Observe(nsISupports* aSubject, const char* aTopic, const char16_t* aData)
{
if (SameCOMIdentity(aSubject, mDocument) && BEFORE_FIRST_PAINT.EqualsASCII(aTopic)) {
ZCC_LOG("Got a before-first-paint event in %p\n", this);
RefreshZoomConstraints();
}
return NS_OK;
}
NS_IMETHODIMP
MobileViewportManager::Observe(nsISupports* aSubject, const char* aTopic, const char16_t* aData)
{
if (SameCOMIdentity(aSubject, mDocument) && BEFORE_FIRST_PAINT.EqualsASCII(aTopic)) {
MVM_LOG("%p: got a before-first-paint event\n", this);
mIsFirstPaint = true;
RefreshViewportSize(false);
}
return NS_OK;
}
NS_IMETHODIMP
MobileViewportManager::Observe(nsISupports* aSubject, const char* aTopic, const char16_t* aData)
{
if (SameCOMIdentity(aSubject, mDocument) && BEFORE_FIRST_PAINT.EqualsASCII(aTopic)) {
MVM_LOG("%p: got a before-first-paint event\n", this);
if (!mPainted) {
// before-first-paint message arrived before load event
SetInitialViewport();
}
}
return NS_OK;
}
void
MobileViewportManager::Destroy()
{
MVM_LOG("%p: destroying\n", this);
if (mEventTarget) {
mEventTarget->RemoveEventListener(DOM_META_ADDED, this, false);
mEventTarget->RemoveEventListener(FULL_ZOOM_CHANGE, this, false);
mEventTarget = nullptr;
}
nsCOMPtr<nsIObserverService> observerService = mozilla::services::GetObserverService();
if (observerService) {
observerService->RemoveObserver(this, BEFORE_FIRST_PAINT.Data());
}
mDocument = nullptr;
mPresShell = nullptr;
}
