New media playback UI.

Source/core/html/shadow/MediaControlElementTypes.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 53 matching lines @@
     HTMLElement* element = toHTMLElement(node);
     if (isHTMLInputElement(*element))
         return static_cast<MediaControlInputElement*>(element)->displayType();
     return static_cast<MediaControlDivElement*>(element)->displayType();
 }
 
 MediaControlElement::MediaControlElement(MediaControls& mediaControls, MediaControlElementType displayType, HTMLElement* element)
     : m_mediaControls(mediaControls)
     , m_displayType(displayType)
     , m_element(element)
+    , m_isShown(true)
+    , m_isWanted(true)
 {
 }
 
 HTMLMediaElement& MediaControlElement::mediaElement() const
 {
     return mediaControls().mediaElement();
 }
 
 void MediaControlElement::hide()
 {
     m_element->setInlineStyleProperty(CSSPropertyDisplay, CSSValueNone);
+    m_isShown = false;
 }
 
 void MediaControlElement::show()
 {
     m_element->removeInlineStyleProperty(CSSPropertyDisplay);
+    m_isShown = true;
+}
+
+bool MediaControlElement::isShown()
+{
+    return m_isShown;
+}
+
+void MediaControlElement::want()
+{
+    m_isWanted = true;
+    show();
+}
+
+void MediaControlElement::dontWant()
+{
+    m_isWanted = false;
+    hide();
+}
+
+bool MediaControlElement::isWanted()
+{
+    return m_isWanted;
+}
+
+int MediaControlElement::minimumWidth()
+{
+    int minWidthInPixels = 48;

[philipj_slow, 2015/07/08 15:06:38]

Not sure the local variable explains much in such a short method, just returning
the values seems OK.

[liberato (no reviews please), 2015/07/09 12:10:56]

Done.

+
+    // We could check the computed style here, but that depends on whether
+    // we've been shown.  Instead, we just memorize 48 except for the

[philipj_slow, 2015/07/08 15:06:38]

Not sure what "memorize" means here, maybe "assume"?

[liberato (no reviews please), 2015/07/09 12:10:56]

Done.

+    // timeline bar.
+    if (m_displayType == MediaSlider)
+        minWidthInPixels = 55;
+
+    return minWidthInPixels;
 }
 
 void MediaControlElement::setDisplayType(MediaControlElementType displayType)
 {
     if (displayType == m_displayType)
         return;
 
     m_displayType = displayType;
     if (LayoutObject* object = m_element->layoutObject())
         object->setShouldDoFullPaintInvalidation();
@@ skipping 44 matching lines @@
     , m_currentValue(0)
 {
 }
 
 void MediaControlTimeDisplayElement::setCurrentValue(double time)
 {
     m_currentValue = time;
 }
 
 } // namespace blink