Navigation transitions (web to native app): Hide/Show transition elements (Blink side)

Source/core/dom/Document.cpp

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  *           (C) 2001 Dirk Mueller (mueller@kde.org)
  *           (C) 2006 Alexey Proskuryakov (ap@webkit.org)
  * Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009, 2011, 2012 Apple Inc. All rights reserved.
  * Copyright (C) 2008, 2009 Torch Mobile Inc. All rights reserved. (http://www.torchmobile.com/)
  * Copyright (C) 2008, 2009, 2011, 2012 Google Inc. All rights reserved.
  * Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies)
  * Copyright (C) Research In Motion Limited 2010-2011. All rights reserved.
@@ skipping 5627 matching lines @@
             newElements.elements.append(transitionElement);
         }
 
         newElements.scope = metaElementContents.substring(firstSemicolon + 1).stripWhiteSpace();
         newElements.selector = selector;
         newElements.markup = markup.toString();
         elementData.append(newElements);
     }
 }
 
-void Document::hideTransitionElements(const AtomicString& cssSelector)
+void Document::updateElementOpacity(const AtomicString& cssSelector, double opacity)
 {
     TrackExceptionState exceptionState;
     RefPtrWillBeRawPtr<StaticElementList> elementList = querySelectorAll(cssSelector, exceptionState);
     if (elementList && !exceptionState.hadException()) {
         unsigned nodeListLength = elementList->length();
 
         for (unsigned nodeIndex = 0; nodeIndex < nodeListLength; ++nodeIndex) {
             Element* element = elementList->item(nodeIndex);
-            element->setInlineStyleProperty(CSSPropertyOpacity, 0.0, CSSPrimitiveValue::CSS_NUMBER);
+            element->setInlineStyleProperty(CSSPropertyOpacity, opacity, CSSPrimitiveValue::CSS_NUMBER);
         }
     }
 }
 
+void Document::hideTransitionElements(const AtomicString& cssSelector)
+{
+    updateElementOpacity(cssSelector, 0.0);
+}
+
+void Document::showTransitionElements(const AtomicString& cssSelector)
+{
+    updateElementOpacity(cssSelector, 1.0);
+}
+
 bool Document::hasFocus() const
 {
     Page* page = this->page();
     if (!page)
         return false;
     if (!page->focusController().isActive() || !page->focusController().isFocused())
         return false;
     Frame* focusedFrame = page->focusController().focusedFrame();
     if (focusedFrame && focusedFrame->isLocalFrame()) {
         if (toLocalFrame(focusedFrame)->tree().isDescendantOf(frame()))
@@ skipping 166 matching lines @@
 #ifndef NDEBUG
 using namespace blink;
 void showLiveDocumentInstances()
 {
     WeakDocumentSet& set = liveDocumentSet();
     fprintf(stderr, "There are %u documents currently alive:\n", set.size());
     for (Document* document : set)
         fprintf(stderr, "- Document %p URL: %s\n", document, document->url().string().utf8().data());
 }
 #endif