Media Remoting: Add interstitial elements to media element shadow dom.

third_party/WebKit/Source/core/html/shadow/MediaRemotingInterstitial.cpp

+// 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 "core/html/shadow/MediaRemotingInterstitial.h"
+
+#include "core/html/HTMLImageElement.h"
+#include "core/html/HTMLVideoElement.h"
+#include "core/html/shadow/MediaRemotingElements.h"
+
+namespace blink {
+
+MediaRemotingInterstitial::MediaRemotingInterstitial(
+    HTMLVideoElement& videoElement)
+    : HTMLDivElement(videoElement.GetDocument()),
+      video_element_(&videoElement) {
+  SetShadowPseudoId(AtomicString("-internal-media-remoting-interstitial"));
+  background_image_ = HTMLImageElement::Create(videoElement.GetDocument());
+  background_image_->SetShadowPseudoId(
+      AtomicString("-internal-media-remoting-background-image"));
+  background_image_->SetSrc(videoElement.getAttribute(HTMLNames::posterAttr));
+  AppendChild(background_image_);
+
+  cast_icon_ = new MediaRemotingCastIconElement(*this);
+  AppendChild(cast_icon_);
+
+  cast_text_message_ = new MediaRemotingCastMessageElement(*this);
+  AppendChild(cast_text_message_);
+
+  exit_button_ = new MediaRemotingExitButtonElement(*this);
+  AppendChild(exit_button_);
+}
+
+void MediaRemotingInterstitial::Show() {
+  RemoveInlineStyleProperty(CSSPropertyDisplay);
+  exit_button_->OnShown();
+}
+
+void MediaRemotingInterstitial::Hide() {
+  SetInlineStyleProperty(CSSPropertyDisplay, CSSValueNone);
+  exit_button_->OnHidden();
+}
+
+void MediaRemotingInterstitial::OnPosterImageChanged() {
+  background_image_->SetSrc(
+      GetVideoElement().getAttribute(HTMLNames::posterAttr));
+}
+
+DEFINE_TRACE(MediaRemotingInterstitial) {
+  visitor->Trace(video_element_);
+  visitor->Trace(background_image_);
+  visitor->Trace(exit_button_);
+  visitor->Trace(cast_icon_);
+  visitor->Trace(cast_text_message_);
+  HTMLDivElement::Trace(visitor);
+}
+
+}  // namespace blink