| /* |
| * 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/CoreExport.h" |
| #include "core/dom/ContainerNode.h" |
| #include "core/dom/DocumentFragment.h" |
| #include "core/dom/Element.h" |
| #include "core/dom/TreeScope.h" |
| |
| namespace blink { |
| |
| class Document; |
| class ElementShadow; |
| class ExceptionState; |
| class HTMLShadowElement; |
| class HTMLSlotElement; |
| class InsertionPoint; |
| class ShadowRootRareDataV0; |
| class SlotAssignment; |
| class StyleSheetList; |
| |
| enum class ShadowRootType { UserAgent, V0, Open, Closed }; |
| |
| class CORE_EXPORT ShadowRoot final : public DocumentFragment, public TreeScope { |
| DEFINE_WRAPPERTYPEINFO(); |
| USING_GARBAGE_COLLECTED_MIXIN(ShadowRoot); |
| |
| public: |
| // FIXME: Current implementation does not work well if a shadow root is |
| // dynamically created. So multiple shadow subtrees in several elements are |
| // prohibited. |
| // See https://github.com/w3c/webcomponents/issues/102 and |
| // http://crbug.com/234020 |
| static ShadowRoot* create(Document& document, ShadowRootType type) { |
| return new ShadowRoot(document, type); |
| } |
| |
| // Disambiguate between Node and TreeScope hierarchies; TreeScope's |
| // implementation is simpler. |
| using TreeScope::document; |
| using TreeScope::getElementById; |
| |
| // Make protected methods from base class public here. |
| using TreeScope::setDocument; |
| using TreeScope::setParentTreeScope; |
| |
| Element& host() const { |
| DCHECK(parentOrShadowHostNode()); |
| return *toElement(parentOrShadowHostNode()); |
| } |
| ElementShadow* owner() const { return host().shadow(); } |
| ShadowRootType type() const { return static_cast<ShadowRootType>(m_type); } |
| String mode() const { |
| return (type() == ShadowRootType::V0 || type() == ShadowRootType::Open) |
| ? "open" |
| : "closed"; |
| }; |
| |
| bool isOpenOrV0() const { |
| return type() == ShadowRootType::V0 || type() == ShadowRootType::Open; |
| } |
| bool isV1() const { |
| return type() == ShadowRootType::Open || type() == ShadowRootType::Closed; |
| } |
| |
| void attachLayoutTree(const AttachContext& = AttachContext()) override; |
| void detachLayoutTree(const AttachContext& = AttachContext()) override; |
| |
| InsertionNotificationRequest insertedInto(ContainerNode*) override; |
| void removedFrom(ContainerNode*) override; |
| |
| // For V0 |
| ShadowRoot* youngerShadowRoot() const; |
| ShadowRoot* olderShadowRoot() const; |
| ShadowRoot* olderShadowRootForBindings() const; |
| void setYoungerShadowRoot(ShadowRoot&); |
| void setOlderShadowRoot(ShadowRoot&); |
| bool isYoungest() const { return !youngerShadowRoot(); } |
| bool isOldest() const { return !olderShadowRoot(); } |
| bool containsShadowElements() const; |
| bool containsContentElements() const; |
| bool containsInsertionPoints() const { |
| return containsShadowElements() || containsContentElements(); |
| } |
| unsigned descendantShadowElementCount() const; |
| HTMLShadowElement* shadowInsertionPointOfYoungerShadowRoot() const; |
| void setShadowInsertionPointOfYoungerShadowRoot(HTMLShadowElement*); |
| void didAddInsertionPoint(InsertionPoint*); |
| void didRemoveInsertionPoint(InsertionPoint*); |
| const HeapVector<Member<InsertionPoint>>& descendantInsertionPoints(); |
| |
| // For Internals, don't use this. |
| unsigned childShadowRootCount() const { return m_childShadowRootCount; } |
| unsigned numberOfStyles() const { return m_numberOfStyles; } |
| |
| void recalcStyle(StyleRecalcChange); |
| |
| void registerScopedHTMLStyleChild(); |
| void unregisterScopedHTMLStyleChild(); |
| |
| SlotAssignment& ensureSlotAssignment(); |
| |
| void distributeV1(); |
| |
| Element* activeElement() const; |
| |
| String innerHTML() const; |
| void setInnerHTML(const String&, ExceptionState&); |
| |
| Node* cloneNode(bool, ExceptionState&); |
| |
| void setDelegatesFocus(bool flag) { m_delegatesFocus = flag; } |
| bool delegatesFocus() const { return m_delegatesFocus; } |
| |
| bool containsShadowRoots() const { return m_childShadowRootCount; } |
| |
| StyleSheetList& styleSheets(); |
| void setStyleSheets(StyleSheetList* styleSheetList) { |
| m_styleSheetList = styleSheetList; |
| } |
| |
| DECLARE_VIRTUAL_TRACE(); |
| |
| DECLARE_VIRTUAL_TRACE_WRAPPERS(); |
| |
| private: |
| ShadowRoot(Document&, ShadowRootType); |
| ~ShadowRoot() override; |
| |
| void childrenChanged(const ChildrenChange&) override; |
| |
| ShadowRootRareDataV0& ensureShadowRootRareDataV0(); |
| |
| void addChildShadowRoot() { ++m_childShadowRootCount; } |
| void removeChildShadowRoot() { |
| DCHECK_GT(m_childShadowRootCount, 0u); |
| --m_childShadowRootCount; |
| } |
| void invalidateDescendantInsertionPoints(); |
| |
| // ShadowRoots should never be cloned. |
| Node* cloneNode(bool) override { return nullptr; } |
| |
| Member<ShadowRootRareDataV0> m_shadowRootRareDataV0; |
| Member<StyleSheetList> m_styleSheetList; |
| Member<SlotAssignment> m_slotAssignment; |
| unsigned m_numberOfStyles : 14; |
| unsigned m_childShadowRootCount : 13; |
| unsigned m_type : 2; |
| unsigned m_registeredWithParentShadowRoot : 1; |
| unsigned m_descendantInsertionPointsIsValid : 1; |
| unsigned m_delegatesFocus : 1; |
| }; |
| |
| inline Element* ShadowRoot::activeElement() const { |
| return adjustedFocusedElement(); |
| } |
| |
| inline ShadowRoot* Element::shadowRootIfV1() const { |
| ShadowRoot* root = this->shadowRoot(); |
| if (root && root->isV1()) |
| return root; |
| return nullptr; |
| } |
| |
| DEFINE_NODE_TYPE_CASTS(ShadowRoot, isShadowRoot()); |
| DEFINE_TYPE_CASTS(ShadowRoot, |
| TreeScope, |
| treeScope, |
| treeScope->rootNode().isShadowRoot(), |
| treeScope.rootNode().isShadowRoot()); |
| DEFINE_TYPE_CASTS(TreeScope, ShadowRoot, shadowRoot, true, true); |
| |
| CORE_EXPORT std::ostream& operator<<(std::ostream&, const ShadowRootType&); |
| |
| } // namespace blink |
| |
| #endif // ShadowRoot_h |