Navigation transitions: Added createStyledMarkupForNavigationTransition

Source/core/editing/markup.cpp

 /*
  * Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009 Apple Inc. All rights reserved.
  * Copyright (C) 2008, 2009, 2010, 2011 Google Inc. All rights reserved.
  * Copyright (C) 2011 Igalia S.L.
  * Copyright (C) 2011 Motorola Mobility. 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
@@ skipping 128 matching lines @@
     const String& styleNodeCloseTag(bool isBlock = false);
     virtual void appendText(StringBuilder& out, Text&) OVERRIDE;
     String renderedText(Node&, const Range*);
     String stringValueForRange(const Node&, const Range*);
     void appendElement(StringBuilder& out, Element&, bool addDisplayInline, RangeFullySelectsNode);
     virtual void appendElement(StringBuilder& out, Element& element, Namespaces*) OVERRIDE { appendElement(out, element, false, DoesFullySelectNode); }
 
     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()
             && m_wrappingStyle && m_wrappingStyle->style();
     }
 
     Vector<String> m_reversedPrecedingMarkup;
     const EAnnotateForInterchange m_shouldAnnotate;
     RawPtrWillBeMember<Node> m_highestNodeToBeSerialized;
     RefPtrWillBeMember<EditingStyle> m_wrappingStyle;
@@ skipping 150 matching lines @@
         } else
             newInlineStyle = EditingStyle::create();
 
         if (element.isStyledElement() && element.inlineStyle())
             newInlineStyle->overrideWithStyle(element.inlineStyle());
 
         if (shouldAnnotateOrForceInline) {
             if (shouldAnnotate())
                 newInlineStyle->mergeStyleFromRulesForSerialization(&toHTMLElement(element));
 
+            if (&element == m_highestNodeToBeSerialized && m_shouldAnnotate == AnnotateForNavigationTransition)
+                newInlineStyle->addAbsolutePositioningFromElement(element);
+
             if (addDisplayInline)
                 newInlineStyle->forceInline();
 
             // If the node is not fully selected by the range, then we don't want to keep styles that affect its relationship to the nodes around it
             // only the ones that affect it and the nodes within it.
             if (rangeFullySelectsNode == DoesNotFullySelectNode && newInlineStyle->style())
                 newInlineStyle->style()->removeProperty(CSSPropertyFloat);
         }
 
         if (!newInlineStyle->isEmpty()) {
             out.appendLiteral(" style=\"");
             appendAttributeValue(out, newInlineStyle->style()->asText(), documentIsHTML);
             out.append('\"');
         }
     }
 
     appendCloseTag(out, element);
 }
 
 Node* StyledMarkupAccumulator::serializeNodes(Node* startNode, Node* pastEnd)
 {
     if (!m_highestNodeToBeSerialized) {
         Node* lastClosed = traverseNodesForSerialization(startNode, pastEnd, DoNotEmitString);
         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(CSSPropertyBackgroundColor);
+            m_wrappingStyle->style()->removeProperty(CSSPropertyBackgroundImage);
+        }
+    }
+
 
     return traverseNodesForSerialization(startNode, pastEnd, EmitString);
 }
 
 Node* StyledMarkupAccumulator::traverseNodesForSerialization(Node* startNode, Node* pastEnd, NodeTraversalMode traversalMode)
 {
     const bool shouldEmit = traversalMode == EmitString;
     WillBeHeapVector<RawPtrWillBeMember<Node> > ancestorsToClose;
     Node* next;
     Node* lastClosed = 0;
     for (Node* n = startNode; n != pastEnd; n = next) {
         // According to <rdar://problem/5730668>, it is possible for n to blow
         // past pastEnd and become null here. This shouldn't be possible.
         // This null check will prevent crashes (but create too much markup)
         // and the ASSERT will hopefully lead us to understanding the problem.
         ASSERT(n);
         if (!n)
             break;
 
         next = NodeTraversal::next(*n);
         bool openedTag = false;
 
         if (isBlock(n) && canHaveChildrenForEditing(n) && next == pastEnd)
             // Don't write out empty block containers that aren't fully selected.
             continue;
 
-        if (!n->renderer() && !enclosingNodeWithTag(firstPositionInOrBeforeNode(n), selectTag)) {
+        if (!n->renderer() && !enclosingNodeWithTag(firstPositionInOrBeforeNode(n), selectTag) && m_shouldAnnotate != AnnotateForNavigationTransition) {
             next = NodeTraversal::nextSkippingChildren(*n);
             // Don't skip over pastEnd.
             if (pastEnd && pastEnd->isDescendantOf(n))
                 next = pastEnd;
         } else {
             // Add the node to the markup if we're not skipping the descendants
             if (shouldEmit)
                 appendStartTag(*n);
 
             // If node has no children, close the tag now.
@@ skipping 703 matching lines @@
     if (!next || !next->isTextNode())
         return;
 
     RefPtrWillBeRawPtr<Text> textNode = toText(node.get());
     RefPtrWillBeRawPtr<Text> textNext = toText(next);
     textNode->appendData(textNext->data());
     if (textNext->parentNode()) // Might have been removed by mutation event.
         textNext->remove(exceptionState);
 }
 
+String createStyledMarkupForNavigationTransition(Node* node)
+{
+    StyledMarkupAccumulator accumulator(0, ResolveAllURLs, AnnotateForNavigationTransition, nullptr, 0);

[esprehn, 2014/07/14 22:04:31]

What updates the style of the page before you get here?

[oystein (OOO til 10th of July), 2014/07/14 22:44:57]

Not sure what you're asking here, exactly. If there's anything calling
recalcStyle if needed? The other places the markup serialization code is used
(like Element::innerHTML/outerHTML) doesn't seem to have anything like this.

+    accumulator.serializeNodes(node, NodeTraversal::nextSkippingChildren(*node));
+
+    static const char* documentMarkup = "<!DOCTYPE html><meta name=\"viewport\" content=\"width=device-width, user-scalable=0\">";
+    return documentMarkup + accumulator.takeResults();
 }
+
+}