Navigation transitions: Added createStyledMarkupForNavigationTransition

Source/core/editing/markup.cpp

Index: Source/core/editing/markup.cpp
diff --git a/Source/core/editing/markup.cpp b/Source/core/editing/markup.cpp
index 2ea076869acc2465946b2c0dd052084f46f536dc..c2b23c359fb6df6067664cf41cfcc71f9417aed8 100644
--- a/Source/core/editing/markup.cpp
+++ b/Source/core/editing/markup.cpp
@@ -136,7 +136,7 @@ private:
     enum NodeTraversalMode { EmitString, DoNotEmitString };
     Node* traverseNodesForSerialization(Node* startNode, Node* pastEnd, NodeTraversalMode);
 
-    bool shouldAnnotate() { return m_shouldAnnotate == AnnotateForInterchange; }
+    bool shouldAnnotate() const { return m_shouldAnnotate == AnnotateForInterchange || m_shouldAnnotate == AnnotateForNavigationTransition; }
     bool shouldApplyWrappingStyle(const Node& node) const
     {
         return m_highestNodeToBeSerialized && m_highestNodeToBeSerialized->parentNode() == node.parentNode()
@@ -305,6 +305,9 @@ void StyledMarkupAccumulator::appendElement(StringBuilder& out, Element& element
             if (shouldAnnotate())
                 newInlineStyle->mergeStyleFromRulesForSerialization(&toHTMLElement(element));
 
+            if (element == m_highestNodeToBeSerialized && m_shouldAnnotate == AnnotateForNavigationTransition)
+                newInlineStyle->addAbsolutePositioningFromElement(&element);
+
             if (addDisplayInline)
                 newInlineStyle->forceInline();
 
@@ -331,8 +334,12 @@ Node* StyledMarkupAccumulator::serializeNodes(Node* startNode, Node* pastEnd)
         m_highestNodeToBeSerialized = lastClosed;
     }
 
-    if (m_highestNodeToBeSerialized && m_highestNodeToBeSerialized->parentNode())
+    if (m_highestNodeToBeSerialized && m_highestNodeToBeSerialized->parentNode()) {
         m_wrappingStyle = EditingStyle::wrappingStyleForSerialization(m_highestNodeToBeSerialized->parentNode(), shouldAnnotate());
+        if (m_shouldAnnotate == AnnotateForNavigationTransition)
+            m_wrappingStyle->style()->removeProperty(CSSPropertyBackground);
+    }
+
 
     return traverseNodesForSerialization(startNode, pastEnd, EmitString);
 }
@@ -1071,4 +1078,12 @@ void mergeWithNextTextNode(PassRefPtr<Node> node, ExceptionState& exceptionState
         textNext->remove(exceptionState);
 }
 
+String createStyledMarkupForNavigationTransition(Node* node)
+{
+    StyledMarkupAccumulator accumulator(0, ResolveAllURLs, AnnotateForNavigationTransition, 0, 0);
+    accumulator.serializeNodes(node, NodeTraversal::nextSkippingChildren(*node));
+
+    return accumulator.takeResults();
+}
+
 }