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