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7fdb378650
Currently, attribute and child arrays (implemented in dom/base/nsAttrAndChildArray.h) start out empty. When cloning, the array ends up being resized multiple times in order to add the attributes and children that are being cloned from the original node. This would be quicker if the array was initialized to the correct size in the first place so that resizes are not necessary. However, preallocating space for children is only necessary when performing a deep clone. Therefore, an additional parameter is being added to the Clone, CopyInnerTo, and CloneDocHelper methods to indicate whether preallocation of children should happen. Attributes are copied either way, so that part of the array is preallocated in both cases. MozReview-Commit-ID: 3iVezeAKXnI --HG-- extra : rebase_source : 9c3deec6d7aafd6411044d623d4863637b45fd58
75 lines
2.2 KiB
C++
75 lines
2.2 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#ifndef mozilla_dom_HTMLDetailsElement_h
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#define mozilla_dom_HTMLDetailsElement_h
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#include "mozilla/AsyncEventDispatcher.h"
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#include "mozilla/Attributes.h"
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#include "nsGenericHTMLElement.h"
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namespace mozilla {
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namespace dom {
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// HTMLDetailsElement implements the <details> tag, which is used as a
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// disclosure widget from which the user can obtain additional information or
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// controls. Please see the spec for more information.
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// https://html.spec.whatwg.org/multipage/forms.html#the-details-element
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//
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class HTMLDetailsElement final : public nsGenericHTMLElement
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{
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public:
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using NodeInfo = mozilla::dom::NodeInfo;
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explicit HTMLDetailsElement(already_AddRefed<NodeInfo>& aNodeInfo)
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: nsGenericHTMLElement(aNodeInfo)
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{
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}
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NS_IMPL_FROMCONTENT_HTML_WITH_TAG(HTMLDetailsElement, details)
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nsIContent* GetFirstSummary() const;
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nsresult Clone(NodeInfo* aNodeInfo, nsINode** aResult,
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bool aPreallocateChildren) const override;
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nsChangeHint GetAttributeChangeHint(const nsIAtom* aAttribute,
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int32_t aModType) const override;
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nsresult BeforeSetAttr(int32_t aNameSpaceID, nsIAtom* aName,
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const nsAttrValueOrString* aValue,
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bool aNotify) override;
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// HTMLDetailsElement WebIDL
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bool Open() const { return GetBoolAttr(nsGkAtoms::open); }
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void SetOpen(bool aOpen, ErrorResult& aError)
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{
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SetHTMLBoolAttr(nsGkAtoms::open, aOpen, aError);
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}
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void ToggleOpen()
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{
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ErrorResult rv;
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SetOpen(!Open(), rv);
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rv.SuppressException();
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}
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virtual void AsyncEventRunning(AsyncEventDispatcher* aEvent) override;
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protected:
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virtual ~HTMLDetailsElement();
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JSObject* WrapNode(JSContext* aCx,
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JS::Handle<JSObject*> aGivenProto) override;
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RefPtr<AsyncEventDispatcher> mToggleEventDispatcher;
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};
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} // namespace dom
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} // namespace mozilla
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#endif /* mozilla_dom_HTMLDetailsElement_h */
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