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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=8 sts=2 et sw=2 tw=80: */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#include "mozilla/dom/UIDirectionManager.h"
#include "mozilla/Preferences.h"
#include "nsIObserverService.h"
#include "nsIWindowMediator.h"
#include "nsDocShell.h"
#include "nsServiceManagerUtils.h"
#include "mozilla/dom/Document.h"
#include "mozilla/Services.h"
#include "mozilla/SimpleEnumerator.h"
namespace mozilla::dom {
NS_IMPL_ISUPPORTS(UIDirectionManager, nsIObserver)
/* static */
NS_IMETHODIMP
UIDirectionManager::Observe(nsISupports* aSubject, const char* aTopic,
const char16_t* aData) {
NS_ENSURE_FALSE(strcmp(aTopic, "intl:app-locales-changed"), NS_ERROR_FAILURE);
// Iterate over all of the windows and notify them of the direction change.
nsCOMPtr<nsIWindowMediator> windowMediator =
do_GetService(NS_WINDOWMEDIATOR_CONTRACTID);
NS_ENSURE_TRUE(windowMediator, NS_ERROR_FAILURE);
nsCOMPtr<nsISimpleEnumerator> windowEnumerator;
windowMediator->GetEnumerator(nullptr, getter_AddRefs(windowEnumerator));
NS_ENSURE_TRUE(windowEnumerator, NS_ERROR_FAILURE);
for (auto& elements : SimpleEnumerator<nsISupports>(windowEnumerator)) {
nsCOMPtr<nsPIDOMWindowOuter> window = do_QueryInterface(elements);
if (window->Closed()) {
continue;
}
RefPtr<BrowsingContext> context = window->GetBrowsingContext();
MOZ_DIAGNOSTIC_ASSERT(context);
if (context->IsDiscarded()) {
continue;
}
context->PreOrderWalk([](BrowsingContext* aContext) {
if (dom::Document* doc = aContext->GetDocument()) {
doc->ResetDocumentDirection();
}
});
}
return NS_OK;
}
/* static */
void UIDirectionManager::Initialize() {
MOZ_ASSERT(!gUIDirectionManager);
MOZ_ASSERT(NS_IsMainThread());
RefPtr<UIDirectionManager> observer = new UIDirectionManager();
nsCOMPtr<nsIObserverService> obs = mozilla::services::GetObserverService();
if (NS_WARN_IF(!obs)) {
return;
}
obs->AddObserver(observer, "intl:app-locales-changed", false);
gUIDirectionManager = observer;
}
/* static */
void UIDirectionManager::Shutdown() {
MOZ_ASSERT(NS_IsMainThread());
if (!gUIDirectionManager) {
return;
}
RefPtr<UIDirectionManager> observer = gUIDirectionManager;
gUIDirectionManager = nullptr;
nsCOMPtr<nsIObserverService> obs = mozilla::services::GetObserverService();
if (!obs) {
return;
}
obs->RemoveObserver(observer, "intl:app-locales-changed");
}
mozilla::StaticRefPtr<UIDirectionManager>
UIDirectionManager::gUIDirectionManager;
} // namespace mozilla::dom
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