Torne (Richard Coles) | 53e740f | 2013-05-09 18:38:43 +0100 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2012 Google Inc. All rights reserved. |
| 3 | * |
| 4 | * Redistribution and use in source and binary forms, with or without |
| 5 | * modification, are permitted provided that the following conditions are |
| 6 | * met: |
| 7 | * |
| 8 | * * Redistributions of source code must retain the above copyright |
| 9 | * notice, this list of conditions and the following disclaimer. |
| 10 | * * Neither the name of Google Inc. nor the names of its |
| 11 | * contributors may be used to endorse or promote products derived from |
| 12 | * this software without specific prior written permission. |
| 13 | * |
| 14 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| 15 | * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| 16 | * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
| 17 | * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
| 18 | * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| 19 | * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
| 20 | * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| 21 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| 22 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| 23 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| 24 | * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| 25 | */ |
| 26 | |
| 27 | #ifndef ElementShadow_h |
| 28 | #define ElementShadow_h |
| 29 | |
| 30 | #include "core/dom/ExceptionCode.h" |
Torne (Richard Coles) | e524955 | 2013-05-15 11:35:13 +0100 | [diff] [blame] | 31 | #include "core/dom/shadow/ContentDistributor.h" |
| 32 | #include "core/dom/shadow/ShadowRoot.h" |
| 33 | #include "wtf/DoublyLinkedList.h" |
| 34 | #include "wtf/Noncopyable.h" |
| 35 | #include "wtf/PassOwnPtr.h" |
| 36 | #include "wtf/PassRefPtr.h" |
| 37 | #include "wtf/Vector.h" |
Torne (Richard Coles) | 53e740f | 2013-05-09 18:38:43 +0100 | [diff] [blame] | 38 | |
| 39 | namespace WebCore { |
| 40 | |
| 41 | class ElementShadow { |
Torne (Richard Coles) | e524955 | 2013-05-15 11:35:13 +0100 | [diff] [blame] | 42 | WTF_MAKE_NONCOPYABLE(ElementShadow); WTF_MAKE_FAST_ALLOCATED; |
Torne (Richard Coles) | 53e740f | 2013-05-09 18:38:43 +0100 | [diff] [blame] | 43 | public: |
| 44 | static PassOwnPtr<ElementShadow> create() |
| 45 | { |
| 46 | return adoptPtr(new ElementShadow()); |
| 47 | } |
| 48 | |
| 49 | ~ElementShadow() |
| 50 | { |
| 51 | removeAllShadowRoots(); |
| 52 | } |
| 53 | |
| 54 | Element* host() const; |
| 55 | ShadowRoot* youngestShadowRoot() const { return m_shadowRoots.head(); } |
| 56 | ShadowRoot* oldestShadowRoot() const { return m_shadowRoots.tail(); } |
| 57 | ElementShadow* containingShadow() const; |
| 58 | |
| 59 | ShadowRoot* addShadowRoot(Element* shadowHost, ShadowRoot::ShadowRootType); |
| 60 | |
| 61 | void attach(); |
| 62 | void detach(); |
| 63 | |
| 64 | bool childNeedsStyleRecalc() const; |
| 65 | bool needsStyleRecalc() const; |
| 66 | void recalcStyle(Node::StyleChange); |
| 67 | void removeAllEventListeners(); |
| 68 | |
| 69 | void invalidateDistribution() { m_distributor.invalidateDistribution(host()); } |
| 70 | void didAffectSelector(AffectedSelectorMask mask) { m_distributor.didAffectSelector(host(), mask); } |
| 71 | void willAffectSelector() { m_distributor.willAffectSelector(host()); } |
| 72 | |
| 73 | ContentDistributor& distributor() { return m_distributor; } |
| 74 | const ContentDistributor& distributor() const { return m_distributor; } |
| 75 | |
| 76 | void reportMemoryUsage(MemoryObjectInfo*) const; |
| 77 | |
| 78 | private: |
| 79 | ElementShadow() { } |
| 80 | |
| 81 | void removeAllShadowRoots(); |
| 82 | |
| 83 | DoublyLinkedList<ShadowRoot> m_shadowRoots; |
| 84 | ContentDistributor m_distributor; |
| 85 | }; |
| 86 | |
| 87 | inline Element* ElementShadow::host() const |
| 88 | { |
| 89 | ASSERT(!m_shadowRoots.isEmpty()); |
| 90 | return youngestShadowRoot()->host(); |
| 91 | } |
| 92 | |
| 93 | inline ShadowRoot* Node::youngestShadowRoot() const |
| 94 | { |
| 95 | if (!this->isElementNode()) |
| 96 | return 0; |
| 97 | if (ElementShadow* shadow = toElement(this)->shadow()) |
| 98 | return shadow->youngestShadowRoot(); |
| 99 | return 0; |
| 100 | } |
| 101 | |
Torne (Richard Coles) | 521d96e | 2013-06-19 11:58:24 +0100 | [diff] [blame] | 102 | inline void Element::ensureDistribution() |
| 103 | { |
| 104 | ContentDistributor::ensureDistribution(this); |
| 105 | } |
| 106 | |
Torne (Richard Coles) | 53e740f | 2013-05-09 18:38:43 +0100 | [diff] [blame] | 107 | inline ElementShadow* ElementShadow::containingShadow() const |
| 108 | { |
| 109 | if (ShadowRoot* parentRoot = host()->containingShadowRoot()) |
| 110 | return parentRoot->owner(); |
| 111 | return 0; |
| 112 | } |
| 113 | |
| 114 | class ShadowRootVector : public Vector<RefPtr<ShadowRoot> > { |
| 115 | public: |
| 116 | explicit ShadowRootVector(ElementShadow* tree) |
| 117 | { |
| 118 | for (ShadowRoot* root = tree->youngestShadowRoot(); root; root = root->olderShadowRoot()) |
| 119 | append(root); |
| 120 | } |
| 121 | }; |
| 122 | |
| 123 | inline ElementShadow* shadowOfParent(const Node* node) |
| 124 | { |
| 125 | if (!node) |
| 126 | return 0; |
| 127 | if (Node* parent = node->parentNode()) |
| 128 | if (parent->isElementNode()) |
| 129 | return toElement(parent)->shadow(); |
| 130 | return 0; |
| 131 | } |
| 132 | |
| 133 | |
| 134 | } // namespace |
| 135 | |
| 136 | #endif |