[Chromecast] Add CastWebContents

chromecast/browser/cast_web_view.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 "chromecast/browser/cast_web_view.h"
+
+#include "base/logging.h"
+#include "base/threading/thread_task_runner_handle.h"
+#include "chromecast/base/metrics/cast_metrics_helper.h"
+#include "content/public/browser/navigation_handle.h"
+#include "content/public/browser/render_frame_host.h"
+#include "content/public/browser/render_view_host.h"
+#include "content/public/browser/render_widget_host.h"
+#include "content/public/browser/render_widget_host_view.h"
+#include "content/public/common/renderer_preferences.h"
+#include "ipc/ipc_message.h"
+#include "net/base/net_errors.h"
+#include "ui/display/display.h"
+#include "ui/display/screen.h"
+#include "url/gurl.h"
+
+#if defined(OS_ANDROID)
+#include "chromecast/browser/android/cast_web_contents_activity.h"
+#endif  // defined(OS_ANDROID)
+
+#if defined(USE_AURA)
+#include "ui/aura/window.h"
+#endif
+
+namespace chromecast {
+
+namespace {
+// The time (in milliseconds) we wait for after a page is closed (i.e.
+// after an app is stopped) before we delete the corresponding WebContents.
+constexpr int kWebContentsDestructionDelayInMs = 50;
+
+std::unique_ptr<content::WebContents> CreateWebContents(
+    content::BrowserContext* browser_context,
+    scoped_refptr<content::SiteInstance> site_instance) {
+  CHECK(display::Screen::GetScreen());
+  gfx::Size display_size =
+      display::Screen::GetScreen()->GetPrimaryDisplay().size();
+
+  content::WebContents::CreateParams create_params(browser_context, NULL);
+  create_params.routing_id = MSG_ROUTING_NONE;
+  create_params.initial_size = display_size;
+  create_params.site_instance = site_instance;
+  content::WebContents* web_contents =
+      content::WebContents::Create(create_params);
+
+#if defined(USE_AURA)
+  // Resize window
+  aura::Window* content_window = web_contents->GetNativeView();
+  content_window->SetBounds(
+      gfx::Rect(display_size.width(), display_size.height()));
+#endif
+
+#if defined(OS_ANDROID)
+  content::RendererPreferences* prefs = web_contents->GetMutableRendererPrefs();
+  prefs->use_video_overlay_for_embedded_encrypted_video = true;
+  web_contents->GetRenderViewHost()->SyncRendererPrefs();
+#endif
+
+  return base::WrapUnique(web_contents);
+}
+
+}  // namespace
+
+CastWebView::CastWebView(Delegate* delegate,
+                         content::BrowserContext* browser_context,
+                         scoped_refptr<content::SiteInstance> site_instance,
+                         bool transparent)
+    : delegate_(delegate),
+      browser_context_(browser_context),
+      site_instance_(std::move(site_instance)),
+      transparent_(transparent),
+      window_(shell::CastContentWindow::Create(delegate)),
+      web_contents_(CreateWebContents(browser_context_, site_instance_)),
+      weak_factory_(this) {
+  DCHECK(delegate_);
+  DCHECK(browser_context_);
+  DCHECK(window_);
+  content::WebContentsObserver::Observe(web_contents_.get());
+  web_contents_->SetDelegate(this);
+
+  if (transparent_)
+    window_->SetTransparent();
+}
+
+CastWebView::~CastWebView() {}

[halliwell, 2017/02/20 22:09:11]

do we need WebContentsObserver::Observe(nullptr), or is that guaranteed to be
taken care of elsewhere.

[derekjchow1, 2017/02/22 00:50:41]

Looks like it's taken care of in the WebContentsObserver destructor.
https://cs.chromium.org/chromium/src/content/public/browser/web_contents_obse...

+
+void CastWebView::LoadUrl(GURL url) {
+  web_contents_->GetController().LoadURL(url, content::Referrer(),
+                                         ui::PAGE_TRANSITION_TYPED, "");
+}
+
+void CastWebView::ClosePage() {
+  content::WebContentsObserver::Observe(nullptr);
+  web_contents_->ClosePage();
+}
+
+void CastWebView::CloseContents(content::WebContents* source) {
+  DCHECK_EQ(source, web_contents_.get());
+
+  // We need to delay the deletion of web_contents_ (currently for 50ms) to

[halliwell, 2017/02/20 22:09:11]

nit, delete 'currently for 50ms' ... just risks becoming incorrect :)

[derekjchow1, 2017/02/22 00:50:41]

Done.

+  // give (and guarantee) the renderer enough time to finish 'onunload'
+  // handler (but we don't want to wait any longer than that to delay the
+  // starting of next app).
+  base::ThreadTaskRunnerHandle::Get()->PostDelayedTask(
+      FROM_HERE, base::Bind(&CastWebView::DelayedCloseContents,
+                            weak_factory_.GetWeakPtr()),
+      base::TimeDelta::FromMilliseconds(kWebContentsDestructionDelayInMs));
+}
+
+void CastWebView::DelayedCloseContents() {
+  // Delete the WebContents object here so that the gfx surface will be
+  // deleted as part of destroying RenderWidgetHostViewCast object.
+  // We want to delete the surface before we start the next app because
+  // the next app could be an external one whose Start() function would
+  // destroy the primary gfx plane.
+  web_contents_.reset();
+  delegate_->OnPageStopped(net::OK);
+}
+
+void CastWebView::Show(CastWindowManager* window_manager) {
+  DCHECK(window_manager);
+  window_->ShowWebContents(web_contents_.get(), window_manager);
+  web_contents_->Focus();
+}
+
+content::WebContents* CastWebView::OpenURLFromTab(
+    content::WebContents* source,
+    const content::OpenURLParams& params) {
+  LOG(INFO) << "Change url: " << params.url;
+  // If source is NULL which means current tab, use web_contents_ of this class.
+  if (!source)
+    source = web_contents_.get();
+  DCHECK_EQ(source, web_contents_.get());
+  // We don't want to create another web_contents. Load url only when source is
+  // specified.
+  if (source) {

[halliwell, 2017/02/20 22:09:11]

in what scenario is source null here?

[derekjchow1, 2017/02/22 00:50:41]

I don't think it's ever null. I don't think web_contents_ can be null in this
function since it's a WebContentsDelegate funciton. Removed check.

+    source->GetController().LoadURL(params.url, params.referrer,
+                                    params.transition, params.extra_headers);
+  }
+  return source;
+}
+
+void CastWebView::LoadingStateChanged(content::WebContents* source,
+                                      bool to_different_document) {
+  delegate_->OnLoadingStateChanged(source->IsLoading());
+}
+
+void CastWebView::ActivateContents(content::WebContents* contents) {
+  DCHECK_EQ(contents, web_contents_.get());
+  contents->GetRenderViewHost()->GetWidget()->Focus();
+}
+
+#if defined(OS_ANDROID)
+base::android::ScopedJavaLocalRef<jobject>
+CastWebView::GetContentVideoViewEmbedder() {
+  DCHECK(web_contents_);
+  auto activity = shell::CastWebContentsActivity::Get(web_contents_.get());
+  return activity->GetContentVideoViewEmbedder();
+}
+#endif  // defined(OS_ANDROID)
+
+void CastWebView::RenderProcessGone(base::TerminationStatus status) {
+  LOG(INFO) << "APP_ERROR_CHILD_PROCESS_CRASHED";
+  delegate_->OnPageStopped(net::ERR_UNEXPECTED);
+}
+
+void CastWebView::RenderViewCreated(content::RenderViewHost* render_view_host) {
+  content::RenderWidgetHostView* view =
+      render_view_host->GetWidget()->GetView();
+  if (view) {
+    view->SetBackgroundColor(transparent_ ? SK_ColorTRANSPARENT
+                                          : SK_ColorBLACK);
+  }
+}
+
+void CastWebView::DidFinishNavigation(
+    content::NavigationHandle* navigation_handle) {
+  // If the navigation was not committed, it means either the page was a
+  // download or error 204/205, or the navigation never left the previous
+  // URL. Ignore these navigations.
+  if (!navigation_handle->HasCommitted()) {
+    LOG(WARNING) << "Navigation did not commit: url="
+                 << navigation_handle->GetURL();
+    return;
+  }
+
+  net::Error error_code = navigation_handle->GetNetErrorCode();
+  if (!navigation_handle->IsErrorPage())
+    return;
+
+  // If we abort errors in an iframe, it can create a really confusing
+  // and fragile user experience.  Rather than create a list of errors
+  // that are most likely to occur, we ignore all of them for now.
+  if (!navigation_handle->IsInMainFrame()) {
+    LOG(ERROR) << "Got error on sub-iframe: url=" << navigation_handle->GetURL()
+               << ", error=" << error_code
+               << ", description=" << net::ErrorToShortString(error_code);
+    return;
+  }
+
+  LOG(ERROR) << "Got error on navigation: url=" << navigation_handle->GetURL()
+             << ", error_code=" << error_code
+             << ", description= " << net::ErrorToShortString(error_code);
+  delegate_->OnPageStopped(error_code);
+}
+
+void CastWebView::DidFailLoad(content::RenderFrameHost* render_frame_host,
+                              const GURL& validated_url,
+                              int error_code,
+                              const base::string16& error_description,
+                              bool was_ignored_by_handler) {
+  // Only report an error if we are the main frame.  See b/8433611.
+  if (render_frame_host->GetParent()) {
+    LOG(ERROR) << "Got error on sub-iframe: url=" << validated_url.spec()
+               << ", error=" << error_code;
+  } else if (error_code == net::ERR_ABORTED) {
+    // ERR_ABORTED means download was aborted by the app, typically this happens
+    // when flinging URL for direct playback, the initial URLRequest gets
+    // cancelled/aborted and then the same URL is requested via the buffered
+    // data source for media::Pipeline playback.
+    LOG(INFO) << "Load canceled: url=" << validated_url.spec();
+  } else {
+    LOG(ERROR) << "Got error on load: url=" << validated_url.spec()
+               << ", error_code=" << error_code;
+    delegate_->OnPageStopped(error_code);
+  }
+}
+
+void CastWebView::DidFirstVisuallyNonEmptyPaint() {
+  metrics::CastMetricsHelper::GetInstance()->LogTimeToFirstPaint();
+}
+
+void CastWebView::DidStartNavigation(
+    content::NavigationHandle* navigation_handle) {
+#if defined(USE_AURA)
+  // Resize window
+  gfx::Size display_size =
+      display::Screen::GetScreen()->GetPrimaryDisplay().size();
+  aura::Window* content_window = web_contents()->GetNativeView();
+  content_window->SetBounds(
+      gfx::Rect(display_size.width(), display_size.height()));
+#endif
+}
+
+void CastWebView::MediaStartedPlaying(const MediaPlayerInfo& media_info,
+                                      const MediaPlayerId& id) {
+  metrics::CastMetricsHelper::GetInstance()->LogMediaPlay();
+}
+
+void CastWebView::MediaStoppedPlaying(const MediaPlayerInfo& media_info,
+                                      const MediaPlayerId& id) {
+  metrics::CastMetricsHelper::GetInstance()->LogMediaPause();
+}
+
+}  // namespace chromecast