Rewrite Shadow DOM distribution engine to support partial synchronous distribution for v1

third_party/WebKit/Source/core/dom/Node.h

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  *           (C) 2001 Dirk Mueller (mueller@kde.org)
  * Copyright (C) 2004-2011, 2014 Apple Inc. All rights reserved.
  * Copyright (C) 2008, 2009 Torch Mobile Inc. All rights reserved. (http://www.torchmobile.com/)
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
  * License as published by the Free Software Foundation; either
@@ skipping 277 matching lines @@
     bool isStyledElement() const { return isHTMLElement() || isSVGElement(); }
 
     bool isDocumentNode() const;
     bool isTreeScope() const;
     bool isDocumentFragment() const { return getFlag(IsDocumentFragmentFlag); }
     bool isShadowRoot() const { return isDocumentFragment() && isTreeScope(); }
     bool isInsertionPoint() const { return getFlag(IsInsertionPointFlag); }
 
     bool canParticipateInFlatTree() const;
     bool isSlotOrActiveInsertionPoint() const;
-    bool slottable() const { return isElementNode() || isTextNode(); }
+    // A re-distribution across v0 and v1 shadow trees is not supported.
+    bool isSlotable() const { return isTextNode() || (isElementNode() && !isInsertionPoint()); }
     AtomicString slotName() const;
 
-    static AtomicString normalizeSlotName(const AtomicString&);
-
     bool hasCustomStyleCallbacks() const { return getFlag(HasCustomStyleCallbacksFlag); }
 
     // If this node is in a shadow tree, returns its shadow host. Otherwise, returns nullptr.
     // TODO(kochi): crbug.com/507413 shadowHost() can return nullptr even when it is in a
     // shadow tree but its root is detached from its host. This can happen when handling
     // queued events (e.g. during execCommand()).
     Element* shadowHost() const;
     // crbug.com/569532: containingShadowRoot() can return nullptr even if isInShadowTree() returns true.
     // This can happen when handling queued events (e.g. during execCommand())
     ShadowRoot* containingShadowRoot() const;
@@ skipping 170 matching lines @@
         return getFlag(InDocumentFlag);
     }
     bool isInShadowTree() const { return getFlag(IsInShadowTreeFlag); }
     bool isInTreeScope() const { return getFlag(static_cast<NodeFlags>(InDocumentFlag | IsInShadowTreeFlag)); }
 
     ElementShadow* parentElementShadow() const;
     bool isInV1ShadowTree() const;
     bool isInV0ShadowTree() const;
     bool isChildOfV1ShadowHost() const;
     bool isChildOfV0ShadowHost() const;
-    bool isSlotAssignable() const { return isTextNode() || isElementNode(); }
+    ShadowRoot* v1ShadowRootOfParent() const;
 
     bool isDocumentTypeNode() const { return getNodeType() == DOCUMENT_TYPE_NODE; }
     virtual bool childTypeAllowed(NodeType) const { return false; }
     unsigned countChildren() const;
 
     bool isDescendantOf(const Node*) const;
     bool contains(const Node*) const;
     bool isShadowIncludingInclusiveAncestorOf(const Node*) const;
     bool containsIncludingHostElements(const Node&) const;
     Node* commonAncestor(const Node&, ContainerNode* (*parent)(const Node&)) const;
@@ skipping 165 matching lines @@
 
     StaticNodeList* getDestinationInsertionPoints();
     HTMLSlotElement* assignedSlot() const;
     HTMLSlotElement* assignedSlotForBinding();
 
     void setAlreadySpellChecked(bool flag) { setFlag(flag, AlreadySpellCheckedFlag); }
     bool isAlreadySpellChecked() { return getFlag(AlreadySpellCheckedFlag); }
 
     bool isFinishedParsingChildren() const { return getFlag(IsFinishedParsingChildrenFlag); }
 
-    void updateAssignmentForInsertedInto(ContainerNode*);
+    void checkSlotChangeAfterInserted() { checkSlotChange(); }
+    void checkSlotChangeBeforeRemoved() { checkSlotChange(); }
 
     DECLARE_VIRTUAL_TRACE();
 
     DECLARE_VIRTUAL_TRACE_WRAPPERS();
 
     unsigned lengthOfContents() const;
 
     v8::Local<v8::Object> wrap(v8::Isolate*, v8::Local<v8::Object> creationContext) override;
     v8::Local<v8::Object> associateWithWrapper(v8::Isolate*, const WrapperTypeInfo*, v8::Local<v8::Object> wrapper) override WARN_UNUSED_RETURN;
 
@@ skipping 100 matching lines @@
     void setIsFinishedParsingChildren(bool value) { setFlag(value, IsFinishedParsingChildrenFlag); }
 
 private:
     // Gets nodeName without caching AtomicStrings. Used by
     // debugName. Compositor may call debugName from the "impl" thread
     // during "commit". The main thread is stopped at that time, but
     // it is not safe to cache AtomicStrings because those are
     // per-thread.
     virtual String debugNodeName() const;
 
+    void checkSlotChange();
+
     enum EditableLevel { Editable, RichlyEditable };
     bool hasEditableStyle(EditableLevel, UserSelectAllTreatment = UserSelectAllIsAlwaysNonEditable) const;
     bool isEditableToAccessibility(EditableLevel) const;
 
     bool isUserActionElementActive() const;
     bool isUserActionElementInActiveChain() const;
     bool isUserActionElementHovered() const;
     bool isUserActionElementFocused() const;
 
     void recalcDistribution();
@@ skipping 104 matching lines @@
 } // namespace blink
 
 #ifndef NDEBUG
 // Outside the WebCore namespace for ease of invocation from gdb.
 void showNode(const blink::Node*);
 void showTree(const blink::Node*);
 void showNodePath(const blink::Node*);
 #endif
 
 #endif // Node_h