forked from mirrors/gecko-dev
112 lines
3.6 KiB
C++
112 lines
3.6 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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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/BrowsingContext.h"
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#include "mozilla/dom/CanonicalBrowsingContext.h"
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#include "mozilla/dom/Document.h"
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#include "mozilla/dom/WindowGlobalChild.h"
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#include "mozilla/dom/WindowGlobalParent.h"
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#include "mozilla/Services.h"
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#include "nsIObserverService.h"
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#include "nsIURI.h"
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#include "nsNetUtil.h"
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#include "nsPIDOMWindow.h"
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#include "nsReadableUtils.h"
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#include "nsThreadUtils.h"
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#include "RestoreTabContentObserver.h"
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using namespace mozilla::dom;
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NS_IMPL_ISUPPORTS(RestoreTabContentObserver, nsIObserver)
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const char* const kAboutReaderTopic = "AboutReader:Ready";
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const char* const kContentDocumentLoaded = "content-document-loaded";
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const char* const kChromeDocumentLoaded = "chrome-document-loaded";
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/* static */
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void RestoreTabContentObserver::Initialize() {
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MOZ_ASSERT(!gRestoreTabContentObserver);
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MOZ_ASSERT(NS_IsMainThread());
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RefPtr<RestoreTabContentObserver> observer = new RestoreTabContentObserver();
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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, kAboutReaderTopic, false);
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obs->AddObserver(observer, kContentDocumentLoaded, false);
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obs->AddObserver(observer, kChromeDocumentLoaded, false);
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gRestoreTabContentObserver = observer;
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}
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/* static */
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void RestoreTabContentObserver::Shutdown() {
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MOZ_ASSERT(NS_IsMainThread());
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if (!gRestoreTabContentObserver) {
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return;
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}
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RefPtr<RestoreTabContentObserver> observer = gRestoreTabContentObserver;
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gRestoreTabContentObserver = 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, kAboutReaderTopic);
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obs->RemoveObserver(observer, kContentDocumentLoaded);
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obs->RemoveObserver(observer, kChromeDocumentLoaded);
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}
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NS_IMETHODIMP
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RestoreTabContentObserver::Observe(nsISupports* aSubject, const char* aTopic,
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const char16_t* aData) {
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nsCOMPtr<nsPIDOMWindowInner> inner;
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if (!strcmp(aTopic, kAboutReaderTopic)) {
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inner = do_QueryInterface(aSubject);
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} else if (!strcmp(aTopic, kContentDocumentLoaded) ||
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!strcmp(aTopic, kChromeDocumentLoaded)) {
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nsCOMPtr<Document> doc = do_QueryInterface(aSubject);
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inner = doc ? doc->GetInnerWindow() : nullptr;
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}
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if (!inner) {
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return NS_OK;
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}
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nsCOMPtr<nsIURI> uri = inner->GetDocumentURI();
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if (!uri) {
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return NS_OK;
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}
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// We'll handle loading about:reader with "AboutReader:Ready"
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// rather than "content-document-loaded".
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if (uri->SchemeIs("about") &&
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StringBeginsWith(uri->GetSpecOrDefault(), "about:reader"_ns) &&
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strcmp(aTopic, kAboutReaderTopic) != 0) {
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return NS_OK;
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}
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RefPtr<BrowsingContext> bc = inner->GetBrowsingContext();
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if (!bc || !bc->Top()->GetHasRestoreData()) {
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return NS_OK;
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}
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if (XRE_IsParentProcess()) {
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if (WindowGlobalParent* wgp = bc->Canonical()->GetCurrentWindowGlobal()) {
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bc->Canonical()->Top()->RequestRestoreTabContent(wgp);
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}
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} else if (WindowContext* windowContext = bc->GetCurrentWindowContext()) {
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if (WindowGlobalChild* wgc = windowContext->GetWindowGlobalChild()) {
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wgc->SendRequestRestoreTabContent();
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}
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}
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return NS_OK;
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}
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mozilla::StaticRefPtr<RestoreTabContentObserver>
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RestoreTabContentObserver::gRestoreTabContentObserver;
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