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

Source/core/dom/Document.cpp

Index: Source/core/dom/Document.cpp
diff --git a/Source/core/dom/Document.cpp b/Source/core/dom/Document.cpp
index 50bfccb701b158c6c80e287d9936e622c79077fb..7e148051480e00659aa313a6e399da3ad07d82e0 100644
--- a/Source/core/dom/Document.cpp
+++ b/Source/core/dom/Document.cpp
@@ -5659,6 +5659,20 @@ void Document::hideTransitionElements(const AtomicString& cssSelector)
     }
 }
 
+void Document::showTransitionElements(const AtomicString& cssSelector)

[Nate Chapin, 2014/11/11 22:18:56]

It might be good to have a private helper to share code between
show/hideTransitionElements, but it's up to you whether it's worth it.

[Zhen Wang, 2014/11/11 22:55:58]

Added a helper function, which updates element's opacity. I am not sure if it is
too general, though it is private. ptal.

+{
+    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, 1.0, CSSPrimitiveValue::CSS_NUMBER);
+        }
+    }
+}
+
 bool Document::hasFocus() const
 {
     Page* page = this->page();