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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
61 lines
1.9 KiB
C++
61 lines
1.9 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_HTMLSummaryElement_h
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#define mozilla_dom_HTMLSummaryElement_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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class HTMLDetailsElement;
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// HTMLSummaryElement implements the <summary> tag, which is used as a summary
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// or legend of the <details> tag. 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 HTMLSummaryElement 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 HTMLSummaryElement(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(HTMLSummaryElement, summary)
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nsresult Clone(NodeInfo* aNodeInfo, nsINode** aResult,
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bool aPreallocateChildren) const override;
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nsresult PostHandleEvent(EventChainPostVisitor& aVisitor) override;
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bool IsHTMLFocusable(bool aWithMouse, bool* aIsFocusable,
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int32_t* aTabIndex) override;
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int32_t TabIndexDefault() override;
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// Return true if this is the first summary element child of a details or the
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// default summary element generated by DetailsFrame.
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bool IsMainSummary() const;
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// Return the details element which contains this summary. Otherwise return
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// nullptr if there is no such details element.
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HTMLDetailsElement* GetDetails() const;
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protected:
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virtual ~HTMLSummaryElement();
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JSObject* WrapNode(JSContext* aCx,
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JS::Handle<JSObject*> aGivenProto) override;
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};
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} // namespace dom
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} // namespace mozilla
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#endif /* mozilla_dom_HTMLSummaryElement_h */
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