| /* |
| * Copyright (C) 2011 Google Inc. All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions are |
| * met: |
| * |
| * * Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * * Neither the name of Google Inc. nor the names of its |
| * contributors may be used to endorse or promote products derived from |
| * this software without specific prior written permission. |
| * |
| * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
| * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
| * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
| * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| */ |
| |
| #ifndef ShadowRoot_h |
| #define ShadowRoot_h |
| |
| #include "core/dom/ContainerNode.h" |
| #include "core/dom/Document.h" |
| #include "core/dom/DocumentFragment.h" |
| #include "core/dom/Element.h" |
| #include "core/dom/TreeScope.h" |
| #include "wtf/DoublyLinkedList.h" |
| |
| namespace WebCore { |
| |
| class ElementShadow; |
| class ExceptionState; |
| class InsertionPoint; |
| class ScopeContentDistribution; |
| |
| class ShadowRoot FINAL : public DocumentFragment, public TreeScope, public DoublyLinkedListNode<ShadowRoot> { |
| friend class WTF::DoublyLinkedListNode<ShadowRoot>; |
| public: |
| // FIXME: We will support multiple shadow subtrees, however current implementation does not work well |
| // if a shadow root is dynamically created. So we prohibit multiple shadow subtrees |
| // in several elements for a while. |
| // See https://bugs.webkit.org/show_bug.cgi?id=77503 and related bugs. |
| enum ShadowRootType { |
| UserAgentShadowRoot = 0, |
| AuthorShadowRoot |
| }; |
| |
| static PassRefPtr<ShadowRoot> create(Document* document, ShadowRootType type) |
| { |
| return adoptRef(new ShadowRoot(document, type)); |
| } |
| |
| void recalcStyle(StyleChange); |
| |
| bool applyAuthorStyles() const { return m_applyAuthorStyles; } |
| void setApplyAuthorStyles(bool); |
| bool resetStyleInheritance() const { return m_resetStyleInheritance; } |
| void setResetStyleInheritance(bool); |
| |
| Element* host() const { return toElement(parentOrShadowHostNode()); } |
| ElementShadow* owner() const { return host() ? host()->shadow() : 0; } |
| |
| String innerHTML() const; |
| void setInnerHTML(const String&, ExceptionState&); |
| |
| Element* activeElement() const; |
| |
| ShadowRoot* youngerShadowRoot() const { return prev(); } |
| ShadowRoot* olderShadowRoot() const { return next(); } |
| |
| ShadowRoot* bindingsOlderShadowRoot() const; |
| bool shouldExposeToBindings() const { return type() == AuthorShadowRoot; } |
| |
| bool isYoungest() const { return !youngerShadowRoot(); } |
| bool isOldest() const { return !olderShadowRoot(); } |
| bool isOldestAuthorShadowRoot() const; |
| |
| virtual void attach(const AttachContext& = AttachContext()) OVERRIDE; |
| |
| virtual InsertionNotificationRequest insertedInto(ContainerNode*) OVERRIDE; |
| virtual void removedFrom(ContainerNode*) OVERRIDE; |
| |
| virtual void registerScopedHTMLStyleChild() OVERRIDE; |
| virtual void unregisterScopedHTMLStyleChild() OVERRIDE; |
| |
| ScopeContentDistribution* scopeDistribution() { return m_scopeDistribution.get(); } |
| const ScopeContentDistribution* scopeDistribution() const { return m_scopeDistribution.get(); } |
| ScopeContentDistribution* ensureScopeDistribution(); |
| |
| bool containsShadowElements() const; |
| bool containsContentElements() const; |
| bool containsInsertionPoints() const { return containsShadowElements() || containsContentElements(); } |
| bool containsShadowRoots() const; |
| InsertionPoint* insertionPoint() const; |
| |
| ShadowRootType type() const { return static_cast<ShadowRootType>(m_type); } |
| |
| PassRefPtr<Node> cloneNode(bool, ExceptionState&); |
| PassRefPtr<Node> cloneNode(ExceptionState& es) { return cloneNode(true, es); } |
| |
| private: |
| ShadowRoot(Document*, ShadowRootType); |
| virtual ~ShadowRoot(); |
| |
| virtual void dispose() OVERRIDE; |
| virtual bool childTypeAllowed(NodeType) const OVERRIDE; |
| virtual void childrenChanged(bool changedByParser, Node* beforeChange, Node* afterChange, int childCountDelta) OVERRIDE; |
| |
| // ShadowRoots should never be cloned. |
| virtual PassRefPtr<Node> cloneNode(bool) OVERRIDE { return 0; } |
| |
| // FIXME: This shouldn't happen. https://bugs.webkit.org/show_bug.cgi?id=88834 |
| bool isOrphan() const { return !host(); } |
| bool isActive() const; |
| |
| ShadowRoot* m_prev; |
| ShadowRoot* m_next; |
| OwnPtr<ScopeContentDistribution> m_scopeDistribution; |
| unsigned m_numberOfStyles : 28; |
| unsigned m_applyAuthorStyles : 1; |
| unsigned m_resetStyleInheritance : 1; |
| unsigned m_type : 1; |
| unsigned m_registeredWithParentShadowRoot : 1; |
| }; |
| |
| inline Element* ShadowRoot::activeElement() const |
| { |
| if (Element* element = treeScope()->adjustedFocusedElement()) |
| return element; |
| return 0; |
| } |
| |
| inline const ShadowRoot* toShadowRoot(const Node* node) |
| { |
| ASSERT_WITH_SECURITY_IMPLICATION(!node || node->isShadowRoot()); |
| return static_cast<const ShadowRoot*>(node); |
| } |
| |
| inline ShadowRoot* toShadowRoot(Node* node) |
| { |
| return const_cast<ShadowRoot*>(toShadowRoot(static_cast<const Node*>(node))); |
| } |
| |
| } // namespace |
| |
| #endif |