Factor out RenderWidgetHostConnector

content/browser/android/render_widget_host_connector.cc

+// 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/browser/android/render_widget_host_connector.h"
+
+#include "content/browser/frame_host/interstitial_page_impl.h"
+#include "content/browser/renderer_host/render_widget_host_view_android.h"
+#include "content/browser/web_contents/web_contents_impl.h"
+
+namespace content {
+
+RenderWidgetHostConnector::Observer::Observer(
+    WebContents* web_contents,
+    RenderWidgetHostConnector* connector)
+    : WebContentsObserver(web_contents),
+      connector_(connector),
+      rwhva_(nullptr) {}
+
+RenderWidgetHostConnector::Observer::~Observer() {}
+
+void RenderWidgetHostConnector::Observer::RenderViewReady() {
+  UpdateRenderWidgetHostView(GetRenderWidgetHostViewAndroid());
+}
+
+void RenderWidgetHostConnector::Observer::RenderViewHostChanged(
+    RenderViewHost* old_host,
+    RenderViewHost* new_host) {
+  if (new_host) {
+    UpdateRenderWidgetHostView(static_cast<RenderWidgetHostViewAndroid*>(
+        new_host->GetWidget()->GetView()));
+  } else {
+    UpdateRenderWidgetHostView(nullptr);
+  }
+}
+
+void RenderWidgetHostConnector::Observer::DidAttachInterstitialPage() {
+  UpdateRenderWidgetHostView(GetRenderWidgetHostViewAndroid());
+}
+
+void RenderWidgetHostConnector::Observer::DidDetachInterstitialPage() {
+  UpdateRenderWidgetHostView(GetRenderWidgetHostViewAndroid());
+}
+
+void RenderWidgetHostConnector::Observer::WebContentsDestroyed() {
+  UpdateRenderWidgetHostView(nullptr);
+  delete connector_;
+}
+
+RenderWidgetHostViewAndroid*
+RenderWidgetHostConnector::Observer::GetRenderWidgetHostViewAndroid() const {
+  RenderWidgetHostView* rwhv = web_contents()->GetRenderWidgetHostView();
+  WebContentsImpl* web_contents_impl =
+      static_cast<WebContentsImpl*>(web_contents());
+  if (web_contents_impl->ShowingInterstitialPage()) {
+    rwhv = web_contents_impl->GetInterstitialPage()
+               ->GetMainFrame()
+               ->GetRenderViewHost()
+               ->GetWidget()
+               ->GetView();
+  }
+  return static_cast<RenderWidgetHostViewAndroid*>(rwhv);
+}
+
+void RenderWidgetHostConnector::Observer::UpdateRenderWidgetHostView(
+    RenderWidgetHostViewAndroid* new_rwhva) {
+  if (rwhva_ == new_rwhva)
+    return;
+
+  connector_->UpdateRenderProcessConnection(rwhva_, new_rwhva);
+  rwhva_ = new_rwhva;
+}
+
+void RenderWidgetHostConnector::Observer::ResetRenderWidgetHostView(
+    RenderWidgetHostViewAndroid* deleted_rwhva) {
+  if (rwhva_ == deleted_rwhva)
+    rwhva_ = nullptr;
+}
+
+RenderWidgetHostConnector::RenderWidgetHostConnector(WebContents* web_contents)
+    : render_widget_observer_(new Observer(web_contents, this)) {}
+
+RenderWidgetHostConnector::~RenderWidgetHostConnector() {}
+
+void RenderWidgetHostConnector::ResetRenderWidgetHostView(
+    RenderWidgetHostViewAndroid* deleted_rwhva) {
+  render_widget_observer_->ResetRenderWidgetHostView(deleted_rwhva);
+}
+
+}  // namespace content