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/*
* Copyright (C) 2012 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.
* * Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the following disclaimer
* in the documentation and/or other materials provided with the
* distribution.
* * 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.
*/
#include "third_party/blink/renderer/core/dom/node_rare_data.h"
#include "third_party/blink/renderer/core/dom/container_node.h"
#include "third_party/blink/renderer/core/dom/element.h"
#include "third_party/blink/renderer/core/dom/element_rare_data.h"
#include "third_party/blink/renderer/core/dom/flat_tree_node_data.h"
#include "third_party/blink/renderer/core/dom/mutation_observer_registration.h"
#include "third_party/blink/renderer/core/dom/node_lists_node_data.h"
#include "third_party/blink/renderer/core/page/page.h"
#include "third_party/blink/renderer/platform/heap/handle.h"
namespace blink {
struct SameSizeAsNodeRareData {
void* pointer_;
Member<void*> willbe_member_[3];
unsigned bitfields_;
};
static_assert(sizeof(NodeRareData) == sizeof(SameSizeAsNodeRareData),
"NodeRareData should stay small");
void NodeMutationObserverData::Trace(Visitor* visitor) {
visitor->Trace(registry_);
visitor->Trace(transient_registry_);
}
void NodeMutationObserverData::AddTransientRegistration(
MutationObserverRegistration* registration) {
transient_registry_.insert(registration);
}
void NodeMutationObserverData::RemoveTransientRegistration(
MutationObserverRegistration* registration) {
DCHECK(transient_registry_.Contains(registration));
transient_registry_.erase(registration);
}
void NodeMutationObserverData::AddRegistration(
MutationObserverRegistration* registration) {
registry_.push_back(registration);
}
void NodeMutationObserverData::RemoveRegistration(
MutationObserverRegistration* registration) {
DCHECK(registry_.Contains(registration));
registry_.EraseAt(registry_.Find(registration));
}
void NodeRareData::TraceAfterDispatch(blink::Visitor* visitor) {
visitor->Trace(mutation_observer_data_);
visitor->Trace(flat_tree_node_data_);
// Do not keep empty NodeListsNodeData objects around.
if (node_lists_ && node_lists_->IsEmpty())
node_lists_.Clear();
else
visitor->Trace(node_lists_);
}
void NodeRareData::Trace(Visitor* visitor) {
if (is_element_rare_data_)
static_cast<ElementRareData*>(this)->TraceAfterDispatch(visitor);
else
TraceAfterDispatch(visitor);
}
void NodeRareData::FinalizeGarbageCollectedObject() {
if (is_element_rare_data_)
static_cast<ElementRareData*>(this)->~ElementRareData();
else
this->~NodeRareData();
}
void NodeRareData::IncrementConnectedSubframeCount() {
SECURITY_CHECK((connected_frame_count_ + 1) <= Page::kMaxNumberOfFrames);
++connected_frame_count_;
}
NodeListsNodeData& NodeRareData::CreateNodeLists() {
node_lists_ = MakeGarbageCollected<NodeListsNodeData>();
return *node_lists_;
}
FlatTreeNodeData& NodeRareData::EnsureFlatTreeNodeData() {
if (!flat_tree_node_data_)
flat_tree_node_data_ = MakeGarbageCollected<FlatTreeNodeData>();
return *flat_tree_node_data_;
}
// Ensure the 10 bits reserved for the connected_frame_count_ cannot overflow.
static_assert(Page::kMaxNumberOfFrames <
(1 << NodeRareData::kConnectedFrameCountBits),
"Frame limit should fit in rare data count");
static_assert(static_cast<int>(NodeRareData::kNumberOfElementFlags) ==
static_cast<int>(ElementFlags::kNumberOfElementFlags),
"kNumberOfElementFlags must match.");
static_assert(
static_cast<int>(NodeRareData::kNumberOfDynamicRestyleFlags) ==
static_cast<int>(DynamicRestyleFlags::kNumberOfDynamicRestyleFlags),
"kNumberOfDynamicRestyleFlags must match.");
} // namespace blink