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1 // Copyright 2015 The Chromium Authors. All rights reserved. | 1 // Copyright 2015 The Chromium Authors. All rights reserved. |
2 // Use of this source code is governed by a BSD-style license that can be | 2 // Use of this source code is governed by a BSD-style license that can be |
3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
4 | 4 |
5 #include "core/dom/shadow/SlotAssignment.h" | 5 #include "core/dom/shadow/SlotAssignment.h" |
6 | 6 |
7 #include "core/HTMLNames.h" | 7 #include "core/HTMLNames.h" |
8 #include "core/dom/ElementTraversal.h" | 8 #include "core/dom/ElementTraversal.h" |
9 #include "core/dom/NodeTraversal.h" | 9 #include "core/dom/NodeTraversal.h" |
10 #include "core/dom/shadow/InsertionPoint.h" | 10 #include "core/dom/shadow/InsertionPoint.h" |
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24 node.lazyReattachIfAttached(); | 24 node.lazyReattachIfAttached(); |
25 } | 25 } |
26 | 26 |
27 void SlotAssignment::resolveAssignment(const ShadowRoot& shadowRoot) | 27 void SlotAssignment::resolveAssignment(const ShadowRoot& shadowRoot) |
28 { | 28 { |
29 m_assignment.clear(); | 29 m_assignment.clear(); |
30 | 30 |
31 using Name2Slot = HashMap<AtomicString, HTMLSlotElement*>; | 31 using Name2Slot = HashMap<AtomicString, HTMLSlotElement*>; |
32 Name2Slot name2slot; | 32 Name2Slot name2slot; |
33 HTMLSlotElement* defaultSlot = nullptr; | 33 HTMLSlotElement* defaultSlot = nullptr; |
34 Vector<HTMLSlotElement*> slots; | |
35 | 34 |
36 // TODO(hayato): Cache slots elements so that we do not have to travese the
shadow tree. See ShadowRoot::descendantInsertionPoints() | 35 // TODO(hayato): Cache slots elements so that we do not have to travese the
shadow tree. See ShadowRoot::descendantInsertionPoints() |
37 for (HTMLSlotElement& slot : Traversal<HTMLSlotElement>::descendantsOf(shado
wRoot)) { | 36 for (HTMLSlotElement& slot : Traversal<HTMLSlotElement>::descendantsOf(shado
wRoot)) { |
38 slot.clearDistribution(); | 37 slot.clearDistribution(); |
39 | 38 |
40 slots.append(&slot); | |
41 | |
42 AtomicString name = slot.fastGetAttribute(HTMLNames::nameAttr); | 39 AtomicString name = slot.fastGetAttribute(HTMLNames::nameAttr); |
43 if (name.isNull() || name.isEmpty()) { | 40 if (name.isNull() || name.isEmpty()) { |
44 if (!defaultSlot) | 41 if (!defaultSlot) |
45 defaultSlot = &slot; | 42 defaultSlot = &slot; |
46 } else { | 43 } else { |
47 name2slot.add(name, &slot); | 44 name2slot.add(name, &slot); |
48 } | 45 } |
49 } | 46 } |
50 | 47 |
51 for (Node& child : NodeTraversal::childrenOf(*shadowRoot.host())) { | 48 for (Node& child : NodeTraversal::childrenOf(*shadowRoot.host())) { |
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67 assign(child, *slot); | 64 assign(child, *slot); |
68 else | 65 else |
69 detachNotAssignedNode(child); | 66 detachNotAssignedNode(child); |
70 } | 67 } |
71 } else if (defaultSlot) { | 68 } else if (defaultSlot) { |
72 assign(child, *defaultSlot); | 69 assign(child, *defaultSlot); |
73 } else { | 70 } else { |
74 detachNotAssignedNode(child); | 71 detachNotAssignedNode(child); |
75 } | 72 } |
76 } | 73 } |
77 | |
78 // Update each slot's distribution in reverse tree order so that a child slo
t is visited before its parent slot. | |
79 for (auto slot = slots.rbegin(); slot != slots.rend(); ++slot) | |
80 (*slot)->updateDistributedNodesWithFallback(); | |
81 } | 74 } |
82 | 75 |
83 void SlotAssignment::assign(Node& hostChild, HTMLSlotElement& slot) | 76 void SlotAssignment::assign(Node& hostChild, HTMLSlotElement& slot) |
84 { | 77 { |
85 m_assignment.add(&hostChild, &slot); | 78 m_assignment.add(&hostChild, &slot); |
86 slot.appendAssignedNode(hostChild); | 79 slot.appendAssignedNode(hostChild); |
87 if (isHTMLSlotElement(hostChild)) | 80 if (isHTMLSlotElement(hostChild)) |
88 slot.appendDistributedNodes(toHTMLSlotElement(hostChild).getDistributedN
odes()); | 81 slot.appendDistributedNodes(toHTMLSlotElement(hostChild).getDistributedN
odes()); |
89 else | 82 else |
90 slot.appendDistributedNode(hostChild); | 83 slot.appendDistributedNode(hostChild); |
91 } | 84 } |
92 | 85 |
93 DEFINE_TRACE(SlotAssignment) | 86 DEFINE_TRACE(SlotAssignment) |
94 { | 87 { |
95 #if ENABLE(OILPAN) | 88 #if ENABLE(OILPAN) |
96 visitor->trace(m_assignment); | 89 visitor->trace(m_assignment); |
97 #endif | 90 #endif |
98 } | 91 } |
99 | 92 |
100 } // namespace blink | 93 } // namespace blink |
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