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

third_party/WebKit/Source/core/html/HTMLVideoElement.cpp

Index: third_party/WebKit/Source/core/html/HTMLVideoElement.cpp
diff --git a/third_party/WebKit/Source/core/html/HTMLVideoElement.cpp b/third_party/WebKit/Source/core/html/HTMLVideoElement.cpp
index 49375b0942e8390506bb741c7e62c5883218759a..692ed57edad6b9ec5db59a9d7e2a0f76414fffc8 100644
--- a/third_party/WebKit/Source/core/html/HTMLVideoElement.cpp
+++ b/third_party/WebKit/Source/core/html/HTMLVideoElement.cpp
@@ -39,6 +39,7 @@
 #include "core/frame/Settings.h"
 #include "core/html/media/MediaCustomControlsFullscreenDetector.h"
 #include "core/html/parser/HTMLParserIdioms.h"
+#include "core/html/shadow/MediaRemotingInterstitial.h"
 #include "core/imagebitmap/ImageBitmapOptions.h"
 #include "core/layout/LayoutImage.h"
 #include "core/layout/LayoutVideo.h"
@@ -66,7 +67,9 @@ enum VideoPersistenceControlsType {
 }  // anonymous namespace
 
 inline HTMLVideoElement::HTMLVideoElement(Document& document)
-    : HTMLMediaElement(videoTag, document) {
+    : HTMLMediaElement(videoTag, document),
+      m_mediaRemotingStatus(NotStarted),
+      m_remotingInterstitial(nullptr) {
   if (document.settings()) {
     m_defaultPosterURL =
         AtomicString(document.settings()->getDefaultVideoPosterURL());
@@ -88,6 +91,7 @@ HTMLVideoElement* HTMLVideoElement::create(Document& document) {
 DEFINE_TRACE(HTMLVideoElement) {
   visitor->trace(m_imageLoader);
   visitor->trace(m_customControlsFullscreenDetector);
+  visitor->trace(m_remotingInterstitial);
   HTMLMediaElement::trace(visitor);
 }
 
@@ -179,6 +183,8 @@ void HTMLVideoElement::parseAttribute(
     // Notify the player when the poster image URL changes.
     if (webMediaPlayer())
       webMediaPlayer()->setPoster(posterImageURL());
+    if (m_remotingInterstitial)

[mlamouri (slow - plz ping), 2017/04/10 13:44:22]

Can you add a TODO explaining that ideally, the original poster should be
painted but for this, it would need to be painted in greyscale?

[xjz, 2017/04/11 04:29:44]

Add comment. It's not TODO, but by design, we need to convert the poster image
to grayscale and blur it after. 

+      m_remotingInterstitial->onPosterImageChanged();
   } else {
     HTMLMediaElement::parseAttribute(params);
   }
@@ -478,4 +484,31 @@ ScriptPromise HTMLVideoElement::createImageBitmap(
                           eventTarget.toLocalDOMWindow()->document(), options));
 }
 
+void HTMLVideoElement::mediaRemotingStarted() {
+  DCHECK_EQ(m_mediaRemotingStatus, NotStarted);
+  m_mediaRemotingStatus = Started;
+  if (!m_remotingInterstitial) {
+    m_remotingInterstitial = new MediaRemotingInterstitial(*this);
+    ShadowRoot& shadowRoot = ensureUserAgentShadowRoot();
+    shadowRoot.insertBefore(m_remotingInterstitial, shadowRoot.firstChild());
+    HTMLMediaElement::assertShadowRootChildren(shadowRoot);
+  }
+  if (m_remotingInterstitial)
+    m_remotingInterstitial->show();
+}
+
+void HTMLVideoElement::mediaRemotingStopped() {
+  if (m_mediaRemotingStatus != Disabled)
+    m_mediaRemotingStatus = NotStarted;
+  if (m_remotingInterstitial)
+    m_remotingInterstitial->hide();
+}
+
+void HTMLVideoElement::disableMediaRemoting() {
+  if (webMediaPlayer())
+    webMediaPlayer()->requestRemotePlaybackDisabled(true);
+  m_mediaRemotingStatus = Disabled;
+  mediaRemotingStopped();
+}
+
 }  // namespace blink