| // Copyright 2017 The Chromium Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #include "content/renderer/manifest/manifest_change_notifier.h" |
| |
| #include <utility> |
| |
| #include "base/bind.h" |
| #include "content/public/renderer/render_frame.h" |
| #include "content/renderer/manifest/manifest_manager.h" |
| #include "third_party/WebKit/common/associated_interfaces/associated_interface_provider.h" |
| #include "third_party/WebKit/public/web/WebDocument.h" |
| #include "third_party/WebKit/public/web/WebLocalFrame.h" |
| |
| namespace content { |
| |
| ManifestChangeNotifier::ManifestChangeNotifier(RenderFrame* render_frame) |
| : RenderFrameObserver(render_frame), weak_factory_(this) {} |
| |
| ManifestChangeNotifier::~ManifestChangeNotifier() = default; |
| |
| void ManifestChangeNotifier::DidChangeManifest() { |
| // Manifests are not considered when the current page has a unique origin. |
| if (!ManifestManager::CanFetchManifest(render_frame())) |
| return; |
| |
| if (weak_factory_.HasWeakPtrs()) |
| return; |
| |
| // Changing the manifest URL can trigger multiple notifications; the manifest |
| // URL update may involve removing the old manifest link before adding the new |
| // one, triggering multiple calls to DidChangeManifest(). Coalesce changes |
| // during a single event loop task to avoid sending spurious notifications to |
| // the browser. |
| // |
| // During document load, coalescing is disabled to maintain relative ordering |
| // of this notification and the favicon URL reporting. |
| if (!render_frame()->GetWebFrame()->IsLoading()) { |
| render_frame() |
| ->GetTaskRunner(blink::TaskType::kUnspecedLoading) |
| ->PostTask(FROM_HERE, |
| base::BindOnce(&ManifestChangeNotifier::ReportManifestChange, |
| weak_factory_.GetWeakPtr())); |
| return; |
| } |
| ReportManifestChange(); |
| } |
| |
| void ManifestChangeNotifier::OnDestruct() { |
| delete this; |
| } |
| |
| void ManifestChangeNotifier::ReportManifestChange() { |
| auto manifest_url = |
| render_frame()->GetWebFrame()->GetDocument().ManifestURL(); |
| if (manifest_url.IsNull()) { |
| GetManifestChangeObserver().ManifestUrlChanged(base::nullopt); |
| } else { |
| GetManifestChangeObserver().ManifestUrlChanged(GURL(manifest_url)); |
| } |
| } |
| |
| mojom::ManifestUrlChangeObserver& |
| ManifestChangeNotifier::GetManifestChangeObserver() { |
| if (!manifest_change_observer_) { |
| render_frame()->GetRemoteAssociatedInterfaces()->GetInterface( |
| &manifest_change_observer_); |
| } |
| return *manifest_change_observer_; |
| } |
| |
| } // namespace content |