Implement media cast buttons

Source/core/html/shadow/MediaControlElements.cpp

 /*
  * Copyright (C) 2008, 2009, 2010, 2011 Apple Inc. All rights reserved.
  * Copyright (C) 2012 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  *
  * 1.  Redistributions of source code must retain the above copyright
  *     notice, this list of conditions and the following disclaimer.
@@ skipping 192 matching lines @@
 {
     return adoptRefWillBeNoop(new MediaControlOverlayEnclosureElement(mediaControls));
 }
 
 const AtomicString& MediaControlOverlayEnclosureElement::shadowPseudoId() const
 {
     DEFINE_STATIC_LOCAL(AtomicString, id, ("-webkit-media-controls-overlay-enclosure", AtomicString::ConstructFromLiteral));
     return id;
 }
 
+void* MediaControlOverlayEnclosureElement::preDispatchEventHandler(Event* event)
+{
+    // When the media element is touched we want to make the overlay cast button visible
+    // (if the other requirements are right) even if JavaScript is doing its own handling of the event.
+    // Doing it in preDispatchEventHandler prevents any interference from JavaScript.
+    if (event && (event->type() == EventTypeNames::click || event->type() == EventTypeNames::touchstart) && mediaElement().hasRemoteRoutes() && !mediaElement().shouldShowControls())

[abarth-chromium, 2014/09/11 16:42:54]

Why click and touchstart?  Isn't click enough?

[aberent, 2014/09/11 17:08:31]

If the JS has a touchstart handler, as on style.com videos, then this can
prevent translation of the touch into a click, hence the need for touchstart. I
have expanded to comment to explain this.

+        mediaControls().showOverlayCastButton();
+    return MediaControlDivElement::preDispatchEventHandler(event);
+}
+
+
 // ----------------------------
 
 MediaControlMuteButtonElement::MediaControlMuteButtonElement(MediaControls& mediaControls)
     : MediaControlInputElement(mediaControls, MediaMuteButton)
 {
 }
 
 PassRefPtrWillBeRawPtr<MediaControlMuteButtonElement> MediaControlMuteButtonElement::create(MediaControls& mediaControls)
 {
     RefPtrWillBeRawPtr<MediaControlMuteButtonElement> button = adoptRefWillBeNoop(new MediaControlMuteButtonElement(mediaControls));
@@ skipping 322 matching lines @@
     return id;
 }
 
 void MediaControlFullscreenButtonElement::setIsFullscreen(bool isFullscreen)
 {
     setDisplayType(isFullscreen ? MediaExitFullscreenButton : MediaEnterFullscreenButton);
 }
 
 // ----------------------------
 
+MediaControlCastButtonElement::MediaControlCastButtonElement(MediaControls& mediaControls, bool isOverlayButton)
+    : MediaControlInputElement(mediaControls, MediaCastOnButton), m_isOverlayButton(isOverlayButton)
+{
+}
+
+PassRefPtrWillBeRawPtr<MediaControlCastButtonElement> MediaControlCastButtonElement::create(MediaControls& mediaControls, bool isOverlayButton)
+{
+    RefPtrWillBeRawPtr<MediaControlCastButtonElement> button = adoptRefWillBeRefCountedGarbageCollected(new MediaControlCastButtonElement(mediaControls, isOverlayButton));
+    button->ensureUserAgentShadowRoot();
+    button->setType("button");
+    return button.release();
+}
+
+void MediaControlCastButtonElement::defaultEventHandler(Event* event)
+{
+    if (event->type() == EventTypeNames::click) {
+        if (mediaElement().isPlayingRemotely()) {
+            mediaElement().requestRemotePlaybackControl();
+        } else {
+            mediaElement().requestRemotePlayback();
+        }
+    }
+    HTMLInputElement::defaultEventHandler(event);
+}
+
+const AtomicString& MediaControlCastButtonElement::shadowPseudoId() const
+{
+    DEFINE_STATIC_LOCAL(AtomicString, id_nonOverlay, ("-internal-media-controls-cast-button", AtomicString::ConstructFromLiteral));
+    DEFINE_STATIC_LOCAL(AtomicString, id_overlay, ("-internal-media-controls-overlay-cast-button", AtomicString::ConstructFromLiteral));
+    return m_isOverlayButton ? id_overlay : id_nonOverlay;
+}
+
+void MediaControlCastButtonElement::setIsPlayingRemotely(bool isPlayingRemotely)
+{
+    setDisplayType(isPlayingRemotely ? MediaCastOnButton : MediaCastOffButton);
+}
+
+bool MediaControlCastButtonElement::keepEventInNode(Event* event)
+{
+    return isUserInteractionEvent(event);
+}
+
+// ----------------------------
+
 MediaControlTimeRemainingDisplayElement::MediaControlTimeRemainingDisplayElement(MediaControls& mediaControls)
     : MediaControlTimeDisplayElement(mediaControls, MediaTimeRemainingDisplay)
 {
 }
 
 PassRefPtrWillBeRawPtr<MediaControlTimeRemainingDisplayElement> MediaControlTimeRemainingDisplayElement::create(MediaControls& mediaControls)
 {
     return adoptRefWillBeNoop(new MediaControlTimeRemainingDisplayElement(mediaControls));
 }
 
@@ skipping 149 matching lines @@
     float fontSize = smallestDimension * 0.05f;
     if (fontSize != m_fontSize) {
         m_fontSize = fontSize;
         setInlineStyleProperty(CSSPropertyFontSize, fontSize, CSSPrimitiveValue::CSS_PX);
     }
 }
 
 // ----------------------------
 
 } // namespace blink