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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
88 lines
2.4 KiB
C++
88 lines
2.4 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* vim: set ts=8 sts=2 et sw=2 tw=80: */
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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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/**
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* Declaration of HTML <label> elements.
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*/
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#ifndef HTMLLabelElement_h
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#define HTMLLabelElement_h
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#include "mozilla/Attributes.h"
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#include "nsGenericHTMLElement.h"
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#include "nsIDOMHTMLLabelElement.h"
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namespace mozilla {
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class EventChainPostVisitor;
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namespace dom {
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class HTMLLabelElement final : public nsGenericHTMLElement,
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public nsIDOMHTMLLabelElement
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{
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public:
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explicit HTMLLabelElement(already_AddRefed<mozilla::dom::NodeInfo>& aNodeInfo)
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: nsGenericHTMLElement(aNodeInfo),
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mHandlingEvent(false)
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{
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}
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NS_IMPL_FROMCONTENT_HTML_WITH_TAG(HTMLLabelElement, label)
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// nsISupports
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NS_DECL_ISUPPORTS_INHERITED
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// Element
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virtual bool IsInteractiveHTMLContent(bool aIgnoreTabindex) const override
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{
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return true;
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}
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// nsIDOMHTMLLabelElement
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NS_DECL_NSIDOMHTMLLABELELEMENT
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HTMLFormElement* GetForm() const;
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void GetHtmlFor(nsString& aHtmlFor)
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{
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GetHTMLAttr(nsGkAtoms::_for, aHtmlFor);
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}
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void SetHtmlFor(const nsAString& aHtmlFor, ErrorResult& aError)
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{
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SetHTMLAttr(nsGkAtoms::_for, aHtmlFor, aError);
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}
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nsGenericHTMLElement* GetControl() const
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{
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return GetLabeledElement();
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}
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using nsGenericHTMLElement::Focus;
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virtual void Focus(mozilla::ErrorResult& aError) override;
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virtual bool IsDisabled() const override { return false; }
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// nsIContent
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virtual nsresult PostHandleEvent(
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EventChainPostVisitor& aVisitor) override;
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virtual bool PerformAccesskey(bool aKeyCausesActivation,
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bool aIsTrustedEvent) override;
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virtual nsresult Clone(mozilla::dom::NodeInfo *aNodeInfo, nsINode **aResult,
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bool aPreallocateChildren) const override;
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nsGenericHTMLElement* GetLabeledElement() const;
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protected:
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virtual ~HTMLLabelElement();
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virtual JSObject* WrapNode(JSContext *aCx, JS::Handle<JSObject*> aGivenProto) override;
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nsGenericHTMLElement* GetFirstLabelableDescendant() const;
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// XXX It would be nice if we could use an event flag instead.
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bool mHandlingEvent;
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};
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} // namespace dom
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} // namespace mozilla
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#endif /* HTMLLabelElement_h */
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